US3864938A - Refrigerant flow control device - Google Patents

Refrigerant flow control device Download PDF

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US3864938A
US3864938A US400475A US40047573A US3864938A US 3864938 A US3864938 A US 3864938A US 400475 A US400475 A US 400475A US 40047573 A US40047573 A US 40047573A US 3864938 A US3864938 A US 3864938A
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refrigerant
flow control
control device
metering
passages
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US400475A
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Jr Richmond S Hayes
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Carrier Corp
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Carrier Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0282—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry of conduit ends, e.g. by using inserts or attachments for modifying the pattern of flow at the conduit inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • F25B41/45—Arrangements for diverging or converging flows, e.g. branch lines or junctions for flow control on the upstream side of the diverging point, e.g. with spiral structure for generating turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0396—Involving pressure control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85938—Non-valved flow dividers

Definitions

  • Cl 62/504, 62/51 1; 62/525, circuits of a multi-circuit evaporator in a refrigeration 137/14 7 5 system comprising an orifice plate having a refriger- 51 Int. Cl F25b 39/02 911! expansion Orifice and a distributor Plate having [58] Field 61 Search 62/504, 511, 525, 527, Passages into which interchangeable metering jets are I 5 137/14, 5 inserted. Refrigerant flows first through the expansion orifice and experiences a first pressure drop, and then [56] References Cited through the metering jets which complete the expan- UNITED STATES PATENTS sion of the refrigerant.
  • Refrigerant feedlines lead from the distributor plate passages to each of the evapora- 2,432,859 12 1947 Carter 62/504 tor circuits I 2,707,868 5/1955 Goodman 62/504 1 2,939,487 6/ I960 Fraser 62/527 5 Claims, 3 Drawing Figures BACKGROUND OF THE INVENTION 1.
  • This invention relates to the control of refrigerant flow from a condenser to a multi-circuit evaporator in a refrigeration system, and in'particular to the expansion of the refrigerant and to the distribution of the refrigerant to the evaporator circuits.
  • refrigerant liquid flows from a condenser, through an expansion device and into an evaporator.
  • Refrigerant vapor proceeds from the evaporator to a compressor, and then back to the condenser to complete the cycle.
  • Some evaporators have a plurality of refrigerant flow paths extending therethrough, and these evaporators require the use of a distribution device on the upstream side of the evaporator for directing refrigerant to each of the circuits.
  • U.S. Pat. No. 2,803,] 16 discloses a flow regulating device which comprises a unitary metal element having an inlet passage at one end from which a plurality of refrigerant passages fan out to the outlet of the device. A venturi is provided at the junction of these passages for expanding refrigerant flowing through the device. It is not feasible to modify such a distributor to vary its expansion characteristics.
  • expansion devices which incorporate interchangeable inserts having different sizes of restriction orifices. Expansion devices of the latter type are taught by U.S. Pat. Nos. 2,676,470 and 3,311,131. The foregoing devices do not serve to distribute refrigerant among a plurality of circuits.
  • An object of the invention is to provide an improved refrigerant flow control device for expanding refrigerant flowing from the condenser to a multi-circuit evaporator in a compression refrigeration system and for distributing the refrigerant among the evaporator circuits.
  • a more particular object of the invention is to provide a refrigerant flow control device of the preceding type which is adaptable for use in various compression refrigeration systems.
  • a further object of the invention is to provide a device of the foregoing type which can be modified for use with a separate expansion device.
  • Yet another object of the invention is to provide a refrigerant flow control device for expanding and distributing refrigerant flowing through a refrigeration system, which device can be inspected and cleaned easily.
  • a refrigerant flow control device which serves the dual functions of expanding refrigerant flowing through a compression refrigeration system and of distributing that refrigerant among the circuits of a multicircuit evaporator in the system.
  • the device comprises I a cup-shaped casing in which are mounted an orifice plate having restriction for imparting a first pressure drop to the refrigerant flowing therethrough and a distributor plate having passages in which are inserted both metering jets for completing the expansion of the refrigerant and feedlines leading to the evaporator circuits.
  • the metering jets are removable and interchangeable whereby different size jets can be used to change the expansion characteristics of the device.
  • the device can be disassembled easily for inspection and for cleaning, and the metering jets can be removed from the device entirely when it is to be used in conjunction .with another expansion device.
  • FIG. 1 shows in schematic form a compression refrigeration system including a refrigerant flow control device according to the present invention, a part of which is cutaway to reveal the inner components thereof-
  • FIG. 2 is a partially cross-section detailed view of the refrigerant flow control device shown in FIG. 1.
  • FIG. 3 is a view taken in the direction of 3-3 as indicated in FIG. 2.
  • the present invention in its preferred form comprises a refrigerant flow control device for expanding refrigerant and for distributing the refrigerant to the circuits of a multi-circuit evaporator.
  • the device is adaptable for use under various operating conditions and it can easily be disassembled for inspection and cleaning.
  • the device includes an orifice plate at its inlet end wherein a restriction imparts a first pressure drop to refrigerant liquid flowing from a condenser, and a distributor plate havingrefrigerant passages in which are inserted interchangeable metering jets for imparting a final pressure drop to the refrigerant.
  • the passages are adapted to receive feedlines which lead to each of the circuits of a multi-circuit evaporator.
  • a refrigeration system which includes a condenser 1, a flow control device 3 according to the invention, a multi-circuit evaporator 5, and a compressor 7.
  • Compressed refrigerant gas proceeds from compressor 7 to condenser l where it gives up heat and condenses.
  • the liquid refrigerant proceeds through device 3 where it is expanded, and it flows through a set of feedlines 9 which direct the re frigerant to the various refrigerant circuits 11 in evaporator 5.
  • the refrigerant absorbs heat in the evaporator and vaporizes, and the vaporized refrigerant returns to compressor 7.
  • Flow control device 3 is illustrated in detail in FIG. 2.
  • the device has an outer casing 13 which has a generally cup-shaped configuration.
  • An orifice plate 15 in the form of a disc having a central restriction orifice 17 is located on rim 19 extending inwardly from the side walls of casing 13.
  • End wall 21 of casing 13 locates a distributor plate 23 in a position parallel to that of orifice plate 15.
  • Distributor plate 23 includes a set of passages 25 for conducting refrigerant through the plate. As indicated more clearly in FIG. 3, there are three such passages one for each circuit in evaporator 5.
  • Each passage 25 is configured to receive a tubular metering jet 27 and the end of a feedline 9.
  • Metering jets 27 are interchangeable inserts comprising tubular portions 29 dimensioned for insertion into a narrow portion 31 of passages 25, and cap 33 for abutting against the upstream face of distributor plate 23.
  • Passages 25 include a widened portion 35 on the downstream side of distributor plate 23 for receiving the ends of feedlines 9.
  • Feedlines 9 are insertable into passages 25 until they abut against shoulders 37 which separate the narrow and wide portions of each of passages 25.
  • Metering jets 27 may be longer than the length of portion 31 of passages 25, in which case the metering jets are in a telescoping relationship with the ends of each of feedlines 9.
  • Metering jets 27 are preferably removable inserts as described more fully below, but feedlines 9 can be permanently bonded to the distributor plate 23 by some appropriate means such as brazing, epoxy, etc.
  • Distributor plate 23 has on its upstream face a centrally located conical portion 39 for reducing the effective size of orifice 17 to increase the expansion of the refrigerant and for directing refrigerant flowing through orifice 17 toward the upstream face of distributor plate 23.
  • Refrigerant is directed into device 3 by a refrigerant line 41 which can include an expanded portion 43 for containing a strainer which functions to remove impurities from the refrigerant.
  • Refrigerant line 41 can be connected to casing 13 of device 3 by means of a braze 45, or by some other suitable means.
  • Refrigerant from condenser l flows through refrigerant line 41 and passes through orifice 17 of orifice plate 15. As liquid regrigerant passes through the orifice, some of the liquid flashes to its gaseous state. The gasliquid mixture is guided in part by the conical surface of element 39 into metering jets 27. By virtue of length and diameter of each of metering jets 27, the remaining liquid refrigerant further expands and flows into feedlines 9 leading to circuits 11 of evaporator 5.
  • Flow control device 3 can easily be modified to change its refrigerant expansion capabilities. To accomplish this, orifice plate is removed giving access to the upstream side of distributor plate 23. Then, using an appropriate tool, metering jets 27 are removed and exchanged for other jets having the desired expansion capabilities. It is also possible to replace orifice plate 15 with another plate having a different size orifice. Likewise, should it be desired to inspect or clean the interior of metering device 3, orifice plate 15 can be removed and jets 27 can be visually inspected. They can be removed, and if obstructions are present therein, they can be cleaned or replaced. Moreover, when device 3 is to be used in a system having a thermal expansion valve or in some other arrangement wherein the device is to function solely as a distributor, it is practicable to remove metering jets 27. Orifice plate 15 can be removed as well.
  • the refrigerant flow regulating device can be tailor fit to refrigeration systems wherein the circuits in evaporator 5 vary among themselves. In situations where the circuits require different amounts of refrigerant expansion for optimum efficiency, it is entirely feasible to insert appropriate metering jets 27 into distributor plate 23 according to the particular circuit 11 being supplied by the jet. Once device 3 has been assembled and it becomes necessary to open the device up to give access to the interior thereof, it may be necessary to break braze 45 and to subsequently rebraze the juncture between refrigerant line 41 and casing 13. This would present no great difficulty and it could be done in the field.
  • the components of flow control device 3 can be fabricated from brass or from some other corrosionresistant metal or plastic, using conventional manufacturing techniques.
  • a refrigerant flow control device for controlling the flow of refrigerant to a multi-circuit evaporator in a refrigeration system, said device comprising:
  • a distributor plate including refrigerant passages for passing refrigerant to feedlines leading to each of the circuits in the evaporators;
  • metering jets having tubular means extending into said refrigerant passages, said tubular means being dimensioned to expand refrigerant flowing therethrough according to the load on the particular circuit receiving refrigerant from the respective metering jets;
  • an orifice plate having orifice means dimensioned to expand refrigerant flowing therethrough;
  • said orifice plate and said distributor plate being mounted in spaced parallel relation in said casing.
  • a refrigerant flow control device according to claim 1 wherein said metering jets are removably inserted in said refrigerant passages.
  • a refrigerant flow control device configured to receive said metering jets and feedlines leading to each of the evaporator circuits, in a telescoping relationship to the tubular means.
  • a refrigerant flow control device according to claim 1 wherein said metering jets each further include a cap for abutting against said distributor plate when the tubular means is inserted into a passage in said distributor for locating said metering jet in the passage.
  • tubular means of at least one of said metering jets is dimensioned differently from the tubular means of others of said metering jets.

Abstract

A device for controlling the flow of refrigerant to the circuits of a multi-circuit evaporator in a refrigeration system, comprising an orifice plate having a refrigerant expansion orifice and a distributor plate having passages into which interchangeable metering jets are inserted. Refrigerant flows first through the expansion orifice and experiences a first pressure drop, and then through the metering jets which complete the expansion of the refrigerant. Refrigerant feedlines lead from the distributor plate passages to each of the evaporator circuits.

Description

O United States Patent Hayes, Jr. Feb. 11, 1975 REFRIGERANT FLOW CONTROL DEVICE 3,120,743 2/1964 Wilson 62/504 3,563,055 2/197] Owens 62/504 [75] Inventor- 'f Hayes 3,795,259 3/1974 Brandin 62/522 I Fayettev1lle, NY. [73] Assignee: Carrier Corporation, Syracuse, NY. Primary y J rIin A I F R' Filed: m 25,1973 ttorney Agent or 1rm aymond Curt1n [2]] Appl. No.: 400,475 [57] ABSTRACT A device for controlling the flow of refrigerant to the [52] US. Cl 62/504, 62/51 1; 62/525, circuits of a multi-circuit evaporator in a refrigeration 137/14 7 5 system, comprising an orifice plate having a refriger- 51 Int. Cl F25b 39/02 911! expansion Orifice and a distributor Plate having [58] Field 61 Search 62/504, 511, 525, 527, Passages into which interchangeable metering jets are I 5 137/14, 5 inserted. Refrigerant flows first through the expansion orifice and experiences a first pressure drop, and then [56] References Cited through the metering jets which complete the expan- UNITED STATES PATENTS sion of the refrigerant. Refrigerant feedlines lead from the distributor plate passages to each of the evapora- 2,432,859 12 1947 Carter 62/504 tor circuits I 2,707,868 5/1955 Goodman 62/504 1 2,939,487 6/ I960 Fraser 62/527 5 Claims, 3 Drawing Figures BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the control of refrigerant flow from a condenser to a multi-circuit evaporator in a refrigeration system, and in'particular to the expansion of the refrigerant and to the distribution of the refrigerant to the evaporator circuits.
2. Description of the Prior Art In compression refrigeration systems, refrigerant liquid flows from a condenser, through an expansion device and into an evaporator. Refrigerant vapor proceeds from the evaporator to a compressor, and then back to the condenser to complete the cycle. Some evaporators have a plurality of refrigerant flow paths extending therethrough, and these evaporators require the use of a distribution device on the upstream side of the evaporator for directing refrigerant to each of the circuits.
It is known in the art to incorporate in a single device means for both metering refrigerant flowing toward the evaporator and means for distributing refrigerant among the evaporator circuits. For example, U.S. Pat. No. 2,803,] 16 discloses a flow regulating device which comprises a unitary metal element having an inlet passage at one end from which a plurality of refrigerant passages fan out to the outlet of the device. A venturi is provided at the junction of these passages for expanding refrigerant flowing through the device. It is not feasible to modify such a distributor to vary its expansion characteristics.
However, expansion devices are known which incorporate interchangeable inserts having different sizes of restriction orifices. Expansion devices of the latter type are taught by U.S. Pat. Nos. 2,676,470 and 3,311,131. The foregoing devices do not serve to distribute refrigerant among a plurality of circuits.
SUMMARY OF THE INVENTION An object of the invention is to provide an improved refrigerant flow control device for expanding refrigerant flowing from the condenser to a multi-circuit evaporator in a compression refrigeration system and for distributing the refrigerant among the evaporator circuits.
A more particular object of the invention is to provide a refrigerant flow control device of the preceding type which is adaptable for use in various compression refrigeration systems.
Specifically, it is an object of the present invention to provide a refrigerant flow control device of the foregoing type which can easily be modified to change the expansion characteristics of the device.
A further object of the invention is to provide a device of the foregoing type which can be modified for use with a separate expansion device.
Yet another object of the invention is to provide a refrigerant flow control device for expanding and distributing refrigerant flowing through a refrigeration system, which device can be inspected and cleaned easily.
Other objects will be apparent from the description to follow and from the appended claims.
The preceding objects are achieved according to the preferred embodiment of the invention by the provision of a refrigerant flow control device which serves the dual functions of expanding refrigerant flowing through a compression refrigeration system and of distributing that refrigerant among the circuits of a multicircuit evaporator in the system. The device comprises I a cup-shaped casing in which are mounted an orifice plate having restriction for imparting a first pressure drop to the refrigerant flowing therethrough and a distributor plate having passages in which are inserted both metering jets for completing the expansion of the refrigerant and feedlines leading to the evaporator circuits. The metering jets are removable and interchangeable whereby different size jets can be used to change the expansion characteristics of the device. The device can be disassembled easily for inspection and for cleaning, and the metering jets can be removed from the device entirely when it is to be used in conjunction .with another expansion device.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows in schematic form a compression refrigeration system including a refrigerant flow control device according to the present invention, a part of which is cutaway to reveal the inner components thereof- FIG. 2 is a partially cross-section detailed view of the refrigerant flow control device shown in FIG. 1.
FIG. 3 is a view taken in the direction of 3-3 as indicated in FIG. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention in its preferred form comprises a refrigerant flow control device for expanding refrigerant and for distributing the refrigerant to the circuits of a multi-circuit evaporator. The device is adaptable for use under various operating conditions and it can easily be disassembled for inspection and cleaning. The device includes an orifice plate at its inlet end wherein a restriction imparts a first pressure drop to refrigerant liquid flowing from a condenser, and a distributor plate havingrefrigerant passages in which are inserted interchangeable metering jets for imparting a final pressure drop to the refrigerant. The passages are adapted to receive feedlines which lead to each of the circuits of a multi-circuit evaporator.
Referring now to FIG. 1, a refrigeration system is depicted which includes a condenser 1, a flow control device 3 according to the invention, a multi-circuit evaporator 5, and a compressor 7. Compressed refrigerant gas proceeds from compressor 7 to condenser l where it gives up heat and condenses. The liquid refrigerant proceeds through device 3 where it is expanded, and it flows through a set of feedlines 9 which direct the re frigerant to the various refrigerant circuits 11 in evaporator 5. The refrigerant absorbs heat in the evaporator and vaporizes, and the vaporized refrigerant returns to compressor 7.
Flow control device 3 is illustrated in detail in FIG. 2. The device has an outer casing 13 which has a generally cup-shaped configuration. An orifice plate 15 in the form of a disc having a central restriction orifice 17 is located on rim 19 extending inwardly from the side walls of casing 13. End wall 21 of casing 13 locates a distributor plate 23 in a position parallel to that of orifice plate 15. Distributor plate 23 includes a set of passages 25 for conducting refrigerant through the plate. As indicated more clearly in FIG. 3, there are three such passages one for each circuit in evaporator 5. Each passage 25 is configured to receive a tubular metering jet 27 and the end of a feedline 9. Metering jets 27 are interchangeable inserts comprising tubular portions 29 dimensioned for insertion into a narrow portion 31 of passages 25, and cap 33 for abutting against the upstream face of distributor plate 23. Passages 25 include a widened portion 35 on the downstream side of distributor plate 23 for receiving the ends of feedlines 9. Feedlines 9 are insertable into passages 25 until they abut against shoulders 37 which separate the narrow and wide portions of each of passages 25. Metering jets 27 may be longer than the length of portion 31 of passages 25, in which case the metering jets are in a telescoping relationship with the ends of each of feedlines 9. Metering jets 27 are preferably removable inserts as described more fully below, but feedlines 9 can be permanently bonded to the distributor plate 23 by some appropriate means such as brazing, epoxy, etc.
Distributor plate 23 has on its upstream face a centrally located conical portion 39 for reducing the effective size of orifice 17 to increase the expansion of the refrigerant and for directing refrigerant flowing through orifice 17 toward the upstream face of distributor plate 23.
Refrigerant is directed into device 3 by a refrigerant line 41 which can include an expanded portion 43 for containing a strainer which functions to remove impurities from the refrigerant. Refrigerant line 41 can be connected to casing 13 of device 3 by means of a braze 45, or by some other suitable means.
Refrigerant from condenser l flows through refrigerant line 41 and passes through orifice 17 of orifice plate 15. As liquid regrigerant passes through the orifice, some of the liquid flashes to its gaseous state. The gasliquid mixture is guided in part by the conical surface of element 39 into metering jets 27. By virtue of length and diameter of each of metering jets 27, the remaining liquid refrigerant further expands and flows into feedlines 9 leading to circuits 11 of evaporator 5.
Flow control device 3 can easily be modified to change its refrigerant expansion capabilities. To accomplish this, orifice plate is removed giving access to the upstream side of distributor plate 23. Then, using an appropriate tool, metering jets 27 are removed and exchanged for other jets having the desired expansion capabilities. It is also possible to replace orifice plate 15 with another plate having a different size orifice. Likewise, should it be desired to inspect or clean the interior of metering device 3, orifice plate 15 can be removed and jets 27 can be visually inspected. They can be removed, and if obstructions are present therein, they can be cleaned or replaced. Moreover, when device 3 is to be used in a system having a thermal expansion valve or in some other arrangement wherein the device is to function solely as a distributor, it is practicable to remove metering jets 27. Orifice plate 15 can be removed as well.
The refrigerant flow regulating device according to this invention can be tailor fit to refrigeration systems wherein the circuits in evaporator 5 vary among themselves. In situations where the circuits require different amounts of refrigerant expansion for optimum efficiency, it is entirely feasible to insert appropriate metering jets 27 into distributor plate 23 according to the particular circuit 11 being supplied by the jet. Once device 3 has been assembled and it becomes necessary to open the device up to give access to the interior thereof, it may be necessary to break braze 45 and to subsequently rebraze the juncture between refrigerant line 41 and casing 13. This would present no great difficulty and it could be done in the field.
The components of flow control device 3 can be fabricated from brass or from some other corrosionresistant metal or plastic, using conventional manufacturing techniques.
The invention has been described in detail with particular reference to a preferred embodiment thereof, but it is to be understood that variations and modifications within the scope of the invention may occur to those skilled in the art to which this invention pertains.
l' claim:
1. A refrigerant flow control device for controlling the flow of refrigerant to a multi-circuit evaporator in a refrigeration system, said device comprising:
a distributor plate including refrigerant passages for passing refrigerant to feedlines leading to each of the circuits in the evaporators;
metering jets having tubular means extending into said refrigerant passages, said tubular means being dimensioned to expand refrigerant flowing therethrough according to the load on the particular circuit receiving refrigerant from the respective metering jets;
a casing; and
an orifice plate having orifice means dimensioned to expand refrigerant flowing therethrough;
said orifice plate and said distributor plate being mounted in spaced parallel relation in said casing.
2. A refrigerant flow control device according to claim 1 wherein said metering jets are removably inserted in said refrigerant passages.
3. A refrigerant flow control device according to claim 1 wherein said refrigerant passages in said distributor plate are configured to receive said metering jets and feedlines leading to each of the evaporator circuits, in a telescoping relationship to the tubular means.
4. A refrigerant flow control device according to claim 1 wherein said metering jets each further include a cap for abutting against said distributor plate when the tubular means is inserted into a passage in said distributor for locating said metering jet in the passage.
5. The invention according to claim 1 wherein the tubular means of at least one of said metering jets is dimensioned differently from the tubular means of others of said metering jets.
l l= l

Claims (5)

1. A refrigerant flow control device for controlling the flow of reFrigerant to a multi-circuit evaporator in a refrigeration system, said device comprising: a distributor plate including refrigerant passages for passing refrigerant to feedlines leading to each of the circuits in the evaporators; metering jets having tubular means extending into said refrigerant passages, said tubular means being dimensioned to expand refrigerant flowing therethrough according to the load on the particular circuit receiving refrigerant from the respective metering jets; a casing; and an orifice plate having orifice means dimensioned to expand refrigerant flowing therethrough; said orifice plate and said distributor plate being mounted in spaced parallel relation in said casing.
2. A refrigerant flow control device according to claim 1 wherein said metering jets are removably inserted in said refrigerant passages.
3. A refrigerant flow control device according to claim 1 wherein said refrigerant passages in said distributor plate are configured to receive said metering jets and feedlines leading to each of the evaporator circuits, in a telescoping relationship to the tubular means.
4. A refrigerant flow control device according to claim 1 wherein said metering jets each further include a cap for abutting against said distributor plate when the tubular means is inserted into a passage in said distributor for locating said metering jet in the passage.
5. The invention according to claim 1 wherein the tubular means of at least one of said metering jets is dimensioned differently from the tubular means of others of said metering jets.
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Cited By (52)

* Cited by examiner, † Cited by third party
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US4126058A (en) * 1977-07-18 1978-11-21 Caterpillar Tractor Co. Fluid flow divider
US4202182A (en) * 1977-05-10 1980-05-13 Hitachi, Ltd. Multi-tube evaporator for a cooler used in an automobile
WO1982003680A1 (en) * 1981-04-13 1982-10-28 Corp Altas Two-phase thermosyphon heater
US4505297A (en) * 1983-08-02 1985-03-19 Shell California Production Inc. Steam distribution manifold
US4512368A (en) * 1982-03-20 1985-04-23 Sumitomo Metal Industries, Ltd. Fluid distributor
US4546610A (en) * 1975-09-22 1985-10-15 Zwick Eugene B Prevaporizing combustion method
EP0160542A2 (en) * 1984-04-27 1985-11-06 Suter Environmental Ltd. Improvements in refrigerant distributors and method of setting up the same
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US4955210A (en) * 1989-08-25 1990-09-11 American Standard Inc. Capillary tube assembly and method of manufacture
US5045874A (en) * 1990-11-05 1991-09-03 Eastman Kodak Company Water distributor system for crossover assemblies in a film processor
US5123263A (en) * 1991-07-05 1992-06-23 Thermo King Corporation Refrigeration system
US5156642A (en) * 1991-08-16 1992-10-20 Robert Lopez Fluid distribution manifold with circularly arranged output ports
WO1993015283A1 (en) * 1992-01-27 1993-08-05 Aqua Smart, Inc. Water saving dispensing device
US5241867A (en) * 1987-07-10 1993-09-07 Bertin Et Cie Method and apparatus for apportioning a primary volume of fluid into a determined number of secondary volumes having a predefined mutual relationship
US5241839A (en) * 1991-04-24 1993-09-07 Modine Manufacturing Company Evaporator for a refrigerant
US5243838A (en) * 1989-08-18 1993-09-14 Matsushita Refrigeration Company Refrigerant shunt
US5253670A (en) * 1992-12-14 1993-10-19 C. H. Perrott, Inc. Multiple drain trap primer valve assembly for sewer lines
US5341656A (en) * 1993-05-20 1994-08-30 Carrier Corporation Combination expansion and flow distributor device
US5960827A (en) * 1996-10-04 1999-10-05 Rosenberg; Peretz Water metering device particularly useful for multiple outlet units
US5979547A (en) * 1996-03-22 1999-11-09 Sanden Corporation Distribution device capable of uniformly distributing a medium to a plurality of tubes of a heat exchanger
US6023940A (en) * 1998-07-06 2000-02-15 Carrier Corporation Flow distributor for air conditioning unit
US6363965B1 (en) 1998-08-25 2002-04-02 Eaton Aeroquip Inc. Manifold assembly
US20050028553A1 (en) * 2003-08-07 2005-02-10 Grau Jeffrey M. Adjustable nozzle distributor
US20070072472A1 (en) * 2005-09-27 2007-03-29 Wiser Herman D Universal coupling device
US20080190134A1 (en) * 2006-11-29 2008-08-14 Parker-Hannifin Corporation Refrigerant flow distributor
US20090314022A1 (en) * 2005-06-14 2009-12-24 Shun Yoshioka Refrigerant flow divider
US20100024440A1 (en) * 2008-08-04 2010-02-04 John Dain Flow Control of a Cryogenic Element to Remove Heat
US20100293980A1 (en) * 2009-05-20 2010-11-25 Sanyo Electric Co., Ltd. Refrigerant distributor
US20100300134A1 (en) * 2009-06-02 2010-12-02 Johnson Controls Technology Company Refrigerant distribution device for refrigeration system
US20120018015A1 (en) * 2010-07-22 2012-01-26 General Electric Company Exhaust plenum flow splitter
CN102829587A (en) * 2012-08-06 2012-12-19 海信科龙电器股份有限公司 Refrigeration equipment for air conditioner and air conditioner comprising same
CN101749897B (en) * 2008-12-01 2013-04-17 浙江三花股份有限公司 Electric flow distributor mechanism
CN101749898B (en) * 2008-12-10 2013-05-01 浙江三花股份有限公司 Electric flow distributor mechanism
CN101762120B (en) * 2008-11-14 2013-06-19 浙江三花股份有限公司 Electric flow distributor
CN101762126B (en) * 2008-11-20 2013-06-19 浙江三花股份有限公司 Electric throttling distributor
US20140050863A1 (en) * 2009-12-31 2014-02-20 Samsung Display Co., Ltd. Evaporator with internal restriction
CN101738030B (en) * 2008-11-06 2014-03-05 浙江三花股份有限公司 Throttle mechanism
CN103673429A (en) * 2013-12-16 2014-03-26 Tcl空调器(中山)有限公司 Capillary tube device used for air-conditioning system refrigeration matching debugging
US20150000332A1 (en) * 2012-02-10 2015-01-01 Daikin Industries, Ltd. Air conditioner
US8931509B2 (en) 2011-10-07 2015-01-13 Trane International Inc. Pressure correcting distributor for heating and cooling systems
US20150047714A1 (en) * 2012-04-13 2015-02-19 Process Development Centre Pty Ltd. Flow distributor
EP2661590A4 (en) * 2011-01-07 2015-10-07 Thermo King Corp Refrigeration system with a distributor having a flow control mechanism and a method for controlling such a system
US20160054037A1 (en) * 2013-04-09 2016-02-25 BSH Hausgeräte GmbH Refrigeration Device Comprising an Evaporator
US20160273847A1 (en) * 2015-03-20 2016-09-22 Hamilton Sundstrand Corporation Heat exchanger distributor swirl vane
EP2357429A3 (en) * 2010-02-17 2017-01-11 Mitsubishi Heavy Industries, Ltd. Refrigerant distributor
CN106766425A (en) * 2017-02-03 2017-05-31 青岛海尔空调器有限总公司 Air-conditioning and its knockout
US20170184351A1 (en) * 2014-07-04 2017-06-29 Mitsubishi Electric Corporation Refrigerant distributor, and heat pump device having the refrigerant distributor
CN107003047A (en) * 2015-01-16 2017-08-01 三菱电机株式会社 Distributor and refrigerating circulatory device
US9902571B2 (en) * 2016-02-29 2018-02-27 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20180128527A1 (en) * 2016-11-07 2018-05-10 Trane International Inc. Variable orifice for a chiller
US10563895B2 (en) * 2016-12-07 2020-02-18 Johnson Controls Technology Company Adjustable inlet header for heat exchanger of an HVAC system
US10820482B2 (en) 2014-11-04 2020-11-03 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system

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Cited By (84)

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Publication number Priority date Publication date Assignee Title
US4546610A (en) * 1975-09-22 1985-10-15 Zwick Eugene B Prevaporizing combustion method
US4202182A (en) * 1977-05-10 1980-05-13 Hitachi, Ltd. Multi-tube evaporator for a cooler used in an automobile
US4126058A (en) * 1977-07-18 1978-11-21 Caterpillar Tractor Co. Fluid flow divider
WO1982003680A1 (en) * 1981-04-13 1982-10-28 Corp Altas Two-phase thermosyphon heater
US4393663A (en) * 1981-04-13 1983-07-19 Gas Research Institute Two-phase thermosyphon heater
US4512368A (en) * 1982-03-20 1985-04-23 Sumitomo Metal Industries, Ltd. Fluid distributor
US4557874A (en) * 1983-06-07 1985-12-10 Volkswagenwerk Aktiengesellschaft Distribution system for a two-phase fluid mixture
US4505297A (en) * 1983-08-02 1985-03-19 Shell California Production Inc. Steam distribution manifold
EP0160542A2 (en) * 1984-04-27 1985-11-06 Suter Environmental Ltd. Improvements in refrigerant distributors and method of setting up the same
EP0160542A3 (en) * 1984-04-27 1986-09-03 Suter Environmental Ltd. Improvements in refrigerant distributors and method of setting up the same
US5241867A (en) * 1987-07-10 1993-09-07 Bertin Et Cie Method and apparatus for apportioning a primary volume of fluid into a determined number of secondary volumes having a predefined mutual relationship
US5243838A (en) * 1989-08-18 1993-09-14 Matsushita Refrigeration Company Refrigerant shunt
US4955210A (en) * 1989-08-25 1990-09-11 American Standard Inc. Capillary tube assembly and method of manufacture
US5045874A (en) * 1990-11-05 1991-09-03 Eastman Kodak Company Water distributor system for crossover assemblies in a film processor
US5287565A (en) * 1990-12-10 1994-02-22 Aqua Smart, Inc. Water saving dispensing device
US5241839A (en) * 1991-04-24 1993-09-07 Modine Manufacturing Company Evaporator for a refrigerant
US5123263A (en) * 1991-07-05 1992-06-23 Thermo King Corporation Refrigeration system
US5156642A (en) * 1991-08-16 1992-10-20 Robert Lopez Fluid distribution manifold with circularly arranged output ports
WO1993015283A1 (en) * 1992-01-27 1993-08-05 Aqua Smart, Inc. Water saving dispensing device
US5253670A (en) * 1992-12-14 1993-10-19 C. H. Perrott, Inc. Multiple drain trap primer valve assembly for sewer lines
US5341656A (en) * 1993-05-20 1994-08-30 Carrier Corporation Combination expansion and flow distributor device
EP0625684A1 (en) * 1993-05-20 1994-11-23 Carrier Corporation Combination expansion and flow distributor device
US5979547A (en) * 1996-03-22 1999-11-09 Sanden Corporation Distribution device capable of uniformly distributing a medium to a plurality of tubes of a heat exchanger
US5960827A (en) * 1996-10-04 1999-10-05 Rosenberg; Peretz Water metering device particularly useful for multiple outlet units
US6023940A (en) * 1998-07-06 2000-02-15 Carrier Corporation Flow distributor for air conditioning unit
US6363965B1 (en) 1998-08-25 2002-04-02 Eaton Aeroquip Inc. Manifold assembly
US20050028553A1 (en) * 2003-08-07 2005-02-10 Grau Jeffrey M. Adjustable nozzle distributor
US7174726B2 (en) 2003-08-07 2007-02-13 Parker-Hannifin Corporation Adjustable nozzle distributor
US20090314022A1 (en) * 2005-06-14 2009-12-24 Shun Yoshioka Refrigerant flow divider
US7921671B2 (en) * 2005-06-14 2011-04-12 Daikin Industries, Ltd. Refrigerant flow divider
US7392664B2 (en) * 2005-09-27 2008-07-01 Danfoss Chatleff, Inc. Universal coupling device
US20080289343A1 (en) * 2005-09-27 2008-11-27 Wiser Herman D Universal coupling device
US7823395B2 (en) * 2005-09-27 2010-11-02 Danfoss Chatleff, Inc. Universal coupling device
US20070072472A1 (en) * 2005-09-27 2007-03-29 Wiser Herman D Universal coupling device
US20080190134A1 (en) * 2006-11-29 2008-08-14 Parker-Hannifin Corporation Refrigerant flow distributor
US20100024440A1 (en) * 2008-08-04 2010-02-04 John Dain Flow Control of a Cryogenic Element to Remove Heat
CN101738030B (en) * 2008-11-06 2014-03-05 浙江三花股份有限公司 Throttle mechanism
CN101762120B (en) * 2008-11-14 2013-06-19 浙江三花股份有限公司 Electric flow distributor
CN101762126B (en) * 2008-11-20 2013-06-19 浙江三花股份有限公司 Electric throttling distributor
CN101749897B (en) * 2008-12-01 2013-04-17 浙江三花股份有限公司 Electric flow distributor mechanism
CN101749898B (en) * 2008-12-10 2013-05-01 浙江三花股份有限公司 Electric flow distributor mechanism
US20100293980A1 (en) * 2009-05-20 2010-11-25 Sanyo Electric Co., Ltd. Refrigerant distributor
US8210574B2 (en) * 2009-05-20 2012-07-03 Sanyo Electric Co., Ltd. Refrigerant distributor
US20100300134A1 (en) * 2009-06-02 2010-12-02 Johnson Controls Technology Company Refrigerant distribution device for refrigeration system
US20140054325A1 (en) * 2009-12-31 2014-02-27 Samsung Display Co., Ltd. Evaporator with internal restriction
US8904819B2 (en) * 2009-12-31 2014-12-09 Samsung Display Co., Ltd. Evaporator with internal restriction
US20140050863A1 (en) * 2009-12-31 2014-02-20 Samsung Display Co., Ltd. Evaporator with internal restriction
EP2357429A3 (en) * 2010-02-17 2017-01-11 Mitsubishi Heavy Industries, Ltd. Refrigerant distributor
US8418717B2 (en) * 2010-07-22 2013-04-16 General Electric Company Exhaust plenum flow splitter
US20120018015A1 (en) * 2010-07-22 2012-01-26 General Electric Company Exhaust plenum flow splitter
CN102400722A (en) * 2010-07-22 2012-04-04 通用电气公司 Exhaust plenum flow splitter
CN102400722B (en) * 2010-07-22 2015-11-25 通用电气公司 Exhaust plenum flow splitter
EP2661590A4 (en) * 2011-01-07 2015-10-07 Thermo King Corp Refrigeration system with a distributor having a flow control mechanism and a method for controlling such a system
US8931509B2 (en) 2011-10-07 2015-01-13 Trane International Inc. Pressure correcting distributor for heating and cooling systems
US20150000332A1 (en) * 2012-02-10 2015-01-01 Daikin Industries, Ltd. Air conditioner
US9765999B2 (en) * 2012-02-10 2017-09-19 Daikin Industries, Ltd. Air conditioner
US20150047714A1 (en) * 2012-04-13 2015-02-19 Process Development Centre Pty Ltd. Flow distributor
JP2015517902A (en) * 2012-04-13 2015-06-25 プロセス ディヴェロップメント センター ピーティーワイ リミテッド Flow distributor
US10465829B2 (en) * 2012-04-13 2019-11-05 Process Development Centre Pty Ltd Flow distributor
CN102829587A (en) * 2012-08-06 2012-12-19 海信科龙电器股份有限公司 Refrigeration equipment for air conditioner and air conditioner comprising same
US20160054037A1 (en) * 2013-04-09 2016-02-25 BSH Hausgeräte GmbH Refrigeration Device Comprising an Evaporator
CN103673429A (en) * 2013-12-16 2014-03-26 Tcl空调器(中山)有限公司 Capillary tube device used for air-conditioning system refrigeration matching debugging
US20170184351A1 (en) * 2014-07-04 2017-06-29 Mitsubishi Electric Corporation Refrigerant distributor, and heat pump device having the refrigerant distributor
US10508871B2 (en) * 2014-07-04 2019-12-17 Mitsubishi Electric Corporation Refrigerant distributor, and heat pump device having the refrigerant distributor
US10827668B2 (en) 2014-11-04 2020-11-10 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10820482B2 (en) 2014-11-04 2020-11-03 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20170276414A1 (en) * 2015-01-16 2017-09-28 Mitsubishi Electric Corporation Distributor and refrigeration cycle apparatus
US10254024B2 (en) * 2015-01-16 2019-04-09 Mitsubishi Electric Corporation Distributor and refrigeration cycle apparatus
CN107003047B (en) * 2015-01-16 2019-12-17 三菱电机株式会社 Distributor and refrigeration cycle device
CN107003047A (en) * 2015-01-16 2017-08-01 三菱电机株式会社 Distributor and refrigerating circulatory device
US20160273847A1 (en) * 2015-03-20 2016-09-22 Hamilton Sundstrand Corporation Heat exchanger distributor swirl vane
US10899561B2 (en) 2016-02-29 2021-01-26 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US9902571B2 (en) * 2016-02-29 2018-02-27 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10486919B2 (en) * 2016-02-29 2019-11-26 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US20180134505A1 (en) * 2016-02-29 2018-05-17 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10676291B2 (en) 2016-02-29 2020-06-09 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10421623B2 (en) * 2016-02-29 2019-09-24 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
US10994952B2 (en) 2016-02-29 2021-05-04 Cnh Industrial Canada, Ltd. Air distribution system for a pneumatic conveying system
CN108061409A (en) * 2016-11-07 2018-05-22 特灵国际有限公司 For the variable orifice of chiller unit
US20180128527A1 (en) * 2016-11-07 2018-05-10 Trane International Inc. Variable orifice for a chiller
US11105544B2 (en) * 2016-11-07 2021-08-31 Trane International Inc. Variable orifice for a chiller
US10563895B2 (en) * 2016-12-07 2020-02-18 Johnson Controls Technology Company Adjustable inlet header for heat exchanger of an HVAC system
US11506434B2 (en) * 2016-12-07 2022-11-22 Johnson Controls Tyco IP Holdings LLP Adjustable inlet header for heat exchanger of an HVAC system
CN106766425A (en) * 2017-02-03 2017-05-31 青岛海尔空调器有限总公司 Air-conditioning and its knockout

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