CA1169672A - Direct fired fryer with wiper means - Google Patents

Direct fired fryer with wiper means

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Publication number
CA1169672A
CA1169672A CA000402122A CA402122A CA1169672A CA 1169672 A CA1169672 A CA 1169672A CA 000402122 A CA000402122 A CA 000402122A CA 402122 A CA402122 A CA 402122A CA 1169672 A CA1169672 A CA 1169672A
Authority
CA
Canada
Prior art keywords
cooking
combustion chamber
fryer
vat
serving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000402122A
Other languages
French (fr)
Inventor
Andrew A. Caridis
Clark K. Benson
Anthony A. Caridis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heat and Control Inc
Original Assignee
Heat and Control Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heat and Control Inc filed Critical Heat and Control Inc
Application granted granted Critical
Publication of CA1169672A publication Critical patent/CA1169672A/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J37/00Baking; Roasting; Grilling; Frying
    • A47J37/12Deep fat fryers, e.g. for frying fish or chips
    • A47J37/1214Deep fat fryers, e.g. for frying fish or chips the food being transported through an oil-bath
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00Liquid purification or separation
    • Y10S210/08Fat fryer

Abstract

ABSTRACT

A direct fired fryer includes a combustion chamber heated by burner means and heats a vat of cooking oil through a partition wall as well as through a network of heat conduct-ing tubes arranged in the vat and communicating with the combustion chamber. A wiper conveyor sweeps fines from the bottom of the vat to a sump for discharge outside of the conveyor and also cleans the upper surfaces of the heat con-ducting tubes to minimize carbonaceous burnoff.

Description

1 1~9~72 P.- 36 817/DNM

IMPROVED DIRECT FIRED FRYER WITH WIPER MEANS

ThiQ invention relateQ to a food cooker and more particu-larly concern~ a food eooker of the direct fired fryer type which i8 adaptable for cooking a large variety of ood S products including breaded and battered product~, fish ~ticks, meat patties, breaded veal cutlet~ and pet food Prior development~ in cooker de~ign are di~clo~ed $n the issued United State- patents held by the a~signee of the present applieation, including U 8. Patents 3,472,155 grant-ed Oetober 14, 1969, No 3,309,981 granted March 21, 1967, No. 3,209,678 granted October 5, 1965 and No 2,833,203 grant d May 6, 1958. With the exception of the food cooker di-clos~a in the la~t mentioned patent, such developments in cooker~ u~ing eooking oil included a heatinq meaw separat-ed from the cook-r ~uch a- a heat exchanger where the cook-ing oil was eirculated by a pump between the eooking vat and heat exehanger It i- apparent that there i8 a ~ub~tantial eapital investment in a cooking sy~tem which $ncludes a heat exch~nger, pumps and filter mean~ all of which permit sub-tantial eontrol to be maintained over the cooking oilguality a~ w-ll a- affording good thermal effieiencies in op-ration. The la~t eriteria i~ e~pocially ignificant when comparlng the thermal efficiencie~ realized in prior direct fired fryer- with tho~- having a remotely located heat exehanger but h-r it hould be appreeiated that the better fficieneie~ in eooker- eguipped with heat exchanger- i8 due in ~ome mea-ure to economie- of ~eale being that the~e 1 169~72
-2-unit~ are generally larger in capacity than the direct fired fryer. Neverthe1ess, it is recognized that direct fired fryers tend to use a disproportionate amount of fuel when fired from below or when fired through cros~ tube~ or longi-tudinal tubes disposed in tho oil contained by the cookingvat. Inferior combu~tion efficiencie~ and poor fuel utili-zation were common where firing was into the tubes because the restricted space available in the tuhes did not permit complete combustion of the fuel and resulted in compromise between a very long yellow flame or a very bright but noisy blue flame projecting into the firing tube.

Contributing to the generally higher operational co~ts of prior direct fired fryers when viewed on an output basis is the tendency of the heated surfaces to acquire a coating of carbonaceous materials deposited by the product through the oil called ~burn on.~ ~he burn on material reduce~ heat conductivity through the metal whether ~t be on the bottom pan surface or on tho cros- tube~ for tube-fired fryers.
A ~orious cleaning problem is al~o cau~ed by burn on with-in tho fryer which must be taken into account in the over-all co~t of fryer operation. Furthermore, the presence of burn on within a fryer degrade~ the product by cau~ing black specks which are picked up by the product and can be un-sightly. Further carbon part;cles in the oil ultimately result in an increased free fatty acid presence within the cooking oil which causes the oil to have a rancid taste. It has been recognized that an $ncrea~e in free fatty acid~ with-in the cooking o$1 results in product degradation. An impor-tant consideration in this invention was to avoid these short-comings.

In ~ummary, the invention re~ides in an improved directfirod fryer including ~ frame having a combustion chamber there~ equipped with burner mean~ for heating the atmos-1 169~72 phere within the combustion chamber. A cooking vat hav-ing wall~ exposed to the combustion chamber 1~ equipped with a plurallty of heat conducting tubes arranged therein in first and second group~ with the first group of tube~
connecting with a manifold communlc~ting with the combustion chamber and also connecting with a second manifold A
second group of heat conducting tube- connects the second manifold to a third manifold which communicates with an exhaust ~tack The heated atmosphere from the combustion chamber circulates through the heating tubes di-posed below the nominal oil level in the cooking vat and wiper means arranged in the cooking vat sweep fines towards ~ ump ~t one end of the vat and also wipes the top ~urfaces of the heat conductlng tubes An ob~ect of the invention is to provide an improved direct fired fryer which i- economical both to fabricate ~nd to operate by achi-vlng efficiencie~ in fuel utilization and by maintaining a clean condition over extended period~ of oporation Another ob~ect of the invention is to provide a cooking unit of the type de-cribed including means for continually brush-ing, sweeping or wiping the surface~ which ~ct ~8 heat transmitting elements to the cooklng oil and thus reduce burn on Another ob~ect of th- invention i~ to provide a fryer in-corporating an improved oil filtering system having movable ~ean- for continually we-ping ~olid p~rticle- from tatlonary filt r mean-Anoth-r ob~ect of the invention i- to provide a d~rect fired fryer which include- heat transf-r urfaces along the side wall~ of the fry-r ~ well ~- ~long the bottom ~nd which in-clude~ heat tran~fer urfaces immer~ed in the cooking oil contained by th- fry-r vat 1 169~72 The~o and other ob~ect~ will be better under~tood from the following description of a preferred form of the invention as illustrated ln the accompanying drawing~.

Figure 1 i8 a longitudinal sectional view of the improved S fryer of tho pre~ent invention;

Figure 2 i~ an enlarged fragmentary, tran~verse ~ectional view taken in the direction of the arrows 2-2 of Figure 3;

Figure 3 is a view in the direction of the arrow~ 3-3 of Figure l;

Figure 4 i8 a fragmentary view in the plane of Figure 1 but showing on an enlarged scale the feed end of the fryer with the infeed conveyor in a lowered condition;

Figure 5 i- a view like Figure 4 but ~howing the discharge end of the fryer;

Figure 6 io a view in the direction of the arrowQ 6-6 from Figure 3;

Figure 7 i~ a view of a reduced ~cale taken in the direction of the arrow~ 7-7 from Figure 3;

Figure 8 i~ an enlongated fragmentation view a~ indicated by the arrows 8 of Figure 7; and Figure 9 1~ a view of another form of the filter ~y~tem u~eful with the prc~ent invention.

11~9~72 Ihe cooking ystem or fryer 10 of the present invention is ~hown in Figures 1, 2 and 3 of the drawing~ and includes a rame 11 formed of sheet metal and structural members, including the leg~ 12, and serve~ to embrace a combus~ion S chamber 13 equipped with a burner 14. In the upper portions of the combustion chamber 13 i8 disposed the bottom wall 16 of a cooking vat or container 17 which holds a supply of cooking oil (not shown). Portion~ of the combustion chamber extend along the side walls of the vat 17 as will appear below. The vat 17 i8 enclo~ed on the top by a hood 18 which i9 equipped with an exhau~t ~tack 19 which contains the cooking oil v~pors within the cooker 10 to minimize discharge of the cooking vapors into the surrounding work area.

A product conveyor 21, referring to Figures 2 and 4, is arranged in the cooking vat 16 to receive product from an in-feed conveyor 22, which may occupy upon choice a de-clining attitude as shown in Figur~ 1, or a .orizontal attitude as shown in Figure 4. The product conveyor~
carry the product through the cooking vat to the discharge section 23 of the conveyor where the product is elevated from the cooking oil to di~charge from the cooker 10 into a ~ub~equent finishing operation including seasoning, packaging and the like.

Arranged below the product conveyor 21 in the vat 16 is a wiper conveyor system 24 which serves to ~weep fine~ towards a sump 26 arranged at the feed end of the cooker 10, a continuously ~ovable filter system 27 may be di~posed in tho sump 26, as indicated in Figure~ 4 and 7, for romoving fines from tho unit while filtering the cooking oil. The wiping conveyor system 24, ~ump 26 and filtor ~ystem 27 will b~ described moro fully below.

She combu-tion chamb-r 13 xtends substantially the full length of the cooking v~t 16 a~ hown in Figure 1 but is 1169~72 ~omewhat wider than the vat 17 ~8 hown in Figur~ 3 80 a8 to provide heating compartments or manifold portions 32, 34 and 38 along the side wall~ 35 of the vat and the side~
30 of the combw tion chamber as may be seen fro~ Pigure~
2, 3 and 6 The combustion chamber i3 preferably provided with walls arranged with insulating materials such a~
insulating blocks or insulating fire brick or the l$ke 28 mounted in the casing 11 and this arrangement ~ubstantially reduces heat flow out to tho surroundings from the combus-tion chamber 13 where the burner 14 may create temperatureson the order of 1500 to 1900F A substantial a unt of heat is transmitted to the cooking oil through the bottom wall or pan 16 of the vat 17 as well a~ through the side wall portion~ 3S of the vat which define one boundary of the manifolds 32, 34 and 38 de~cribed below A further considerable amount of heat is imparted to the cooking oil within the vat 17 by a plurality of heat conducting tube~
29 arranged in ets to communicate with a plurality of manifold~ ~o that the hot atmo~phere from the combustion chamber 13 may circulate through the manifold and tube~
in a path to be described in detail below before exiting the cooker 10 at a stack 31, Pigure 3 More p~rticularly, the system for u~ing the heated atmosphere from the combustion chamber 13 for heating the cooking oil through use of the heating tubes 29 include- the provi~ion of a first manifold 32, a~ shown in Figures 3 and 6, which is formed by the space between th- ~ide wall~ 35 of the vat 17 and the surface 30 of th fire brick and which communicate~
with th- combustion chamber 13 through an elongated slot 33 formed between the vat and ~ recess in the ln-ulation block-28 a~ ~hown in Figure~ 1 and 6 The manifold 32 i~ arranged at each end of the fryer 10 a~ may be seen from Figure 3 A
Jecond manifold 34, similarly constructed, is arranged on the oppoJite Jide of the fryer and extend8 gub~tantially the full length of the p~n but iQ not in eommunication wlth the eombustion chamber 13 as are the fir~t manifold~ 32 but reeoive~ heated atmo~phere therein transferrod to it through the heat eondueting tube- as de~erlbed below S A~ shown in Figure 3, a first ~et 36 of eight heat conduct-ing pipes or tubeQ 29 extends between the first 32 and ~econd 34 manifolds at each end of the vat Depending upon the Qize and heat requirement~ of the unit a larger or smaller number than eight tubes in the first set may be employed A seeond ~et 37 of, for example, sixteen eonducting tubes 29 extends from the second manifold 34 to a third manifold 38 in communi-cation with the stack 31 It i~ apparent from the above that the hot atmosphere generated in the combu~tion chamber 13 heats the oil through the pan 16 and i~ caused to eirculate into the fir~t manifold 32 through the slots 33 from the combu~tion chamber 13 The hot atmosphore then passe~ from tho fir~t manifold 32 through the first set 36 of eondueting tubes into the seeond manifold 34 and then into the second set 37 of eonducting pipes to the third manifold 38 before exiting to the ~tack 31 of tho hoating ystem As may be ~een from Figure 2, the eonducting tubes 29 are arranged above the bottom wall 16 of the vat 17 and below the nominal liquid level 39 of the oil The substantial external area of the tube~ 29 afford rapid heat tran~fer to the eooking oil and through the inelusion of solected internal heat absorbing partition~ or heat recouperator~
(not shown) within the tubes 29 the heat transfer may be furthor lner-a~ed ~o that a ~ubstantial amount of hoat ie taken from the atmosphere generated in the eombustion eh~mbor nd d livered to th- eooking oil Por ex~mplo, the unit 10 maintaln- tho eooking oil at a temperature on th- order of 300 to 375 F with a tack temperatur on the ordor of 900~F and a eombu tion ehamber temperaturo on the ~1~9S72 order of 1700F The volu~e of oil in th~ v~t 1~ on the order of 150 gallon~ ~n a fryor unit wher~ th~ coo~ing surfac- axea waJ on the order of 30 squaro fe-t the heat transfer area, arranged in he configuration described S above, waJ 86 ~quare feet giving a ratio of heat transfer area to cooking area of 2 8 which i3 substantially ~ore heat transfer area than achieved in previou~ direct fired cooking units The fine~ wiper conveyor 24, Figur 2, 18 adapted to sweep the bottom wall 16 of the vat 17 with it~ lower run ql and to wipe the upper periphery of each conducting tube 29 on the upper run 42 m e wiper conveyor 24 i8 of endle~J con-veyor construction having a plurality of interconnected chain links 43 reeved over ~procket~ 44, Figure 4, one pair lS of which are driven through a driv~ shaft 46 coupled to a motor through a speed reducer (not shown) ~o that the con-veyor 24 ves at a very slow rat of speed, say, 12 inche~
por minute, for progreJsively cloaning the vat The wiper element- 51 are form d of length~ of wire screen mesh materi-al and ~u~pended from cros~ rod~ 52 which extend betweenchain link- 43 arranged on oppo~it~ side~ of th~ wiper con-veyor Tho wiper elements 51 extend somewhat les~ than the full width of the pan and preferably are short elements maintained in spaced posit~on by ~pacer member~ 53 arranged on succes~ive cros~ rods 52 in staggered relationship ~o that one cro~s rod 52 may have a plurality of wiper and ~pacer elements arranged there~long off~et from the cros~
rod~ and spacer~ 53 on the next ad~acent rod 52, as shown in Figure 2 Tho end of each cross rod 52 i~ equipped with a non-metalic sliding block 54 arranged on the outside of the cha$n link 43 ~o that the wiper may ~lide along tho bottom p~n 16 on tho lowor run 41 and along the horizontal track 56 on tho upper wiper run 42 A guide rall 57, Pigure 4, i8 provid~d to guide the run 42 onto the track 56 ~ 169672 so that the wiper elements 51 may ta~e the position ~hown in Pigure 4 for wiping action over the upper 180 circum ferential surface of the cro~s tubeA 29 , .
Referring no~ to ~igure~ 4 and 7, food particlo~ 60 and S the li~e may drop from the product conveyor 21 and fall through the cooking oil These are swept in a po~itive manner along the pan 16 by the continuously movable wiping conveyor 24 and are deposited in the ~ump 26 An outlet 61 from the qump i8 coupled to an oil circulating, positive displacement pump (n,ot shown) 80 that oil may be continu-ously withdrawn from the sump 26 through a fine~ removal system 27 at the rate of about 20 gallon~ per minute The oil thus removed and filtered to eliminate particle~
down to about tho 10 micron or le~a range, is returned to the vat 17 at an inlet ~not shown) near the product dis-charge More particularly, the fines removal filter ~ystem useful with the invention includea a ~tationary fi}ter element 62 arranged over a pl~num 63 which extend- upwardly ~ to about the nominal oil level 39, Figure 7 If deJired, a layer of d~atomaceow earth 64 may bo retained upon the ' stationary filt~r element 62 or other filter media may be employed such a- fin- wire ~creen 6S, filter paper 69 or the like, or a combination of theQe element , Figure 8 The filtor system 27 includes a continuou~ly wiping conveyor 66 having flight~ 67 ad~u~table with re~pect to the distance above the filter ~urface This g~ve~ a wiping action across the surface of the stationary filter 62 with the conveyor 66 delivering the particle~ 60 thua removed to a di~charge chute 68 below which may be positioned a refuse container (not ahown~. ThUJ, fineJ carried along the pan 16 into tho JUmp 26 ar~ ~aintained entrained in the oil withdrawn from the sump through the di~charga outlet 61 and thus the fine~ are drawn again~t tha Jtationary filter 62 equipped with JUit-1 169~7~

abl- filter media Th~ flighted, continuou- conveyor 66 sweep~ over the surface of the fllter 62 and move- the par~icles entrained thereon to the di charge chute 68 for collection outside of the fryer 10 S The operation of the fryer 10 involve~ the step~ of supply-ing to the cooking container or vat 17 a volume of cooking oil to cover the heat transfer tube- 29 and to extend to a level 39 to cover the product conveyor 21 which may be of conventional arrangement The burner 14, fired with conven-tional fossil fuels which may be gaseous, liquid or solidfuels such as coal or wood and wood chip-, i- ignited so as to raise the temperature within the combustion chamber 13 as well as to generate therein a positive pressure to encourage flow of the hot atmosphere through the conduct-ing tubes 29 towards the ~tack 31. While a burner 41 has been shown in a preferred form of the invention it i~ also fea~ible to u~e electrically heated element arranged within tho chamber 13 and u~ed with a fan or centrifugal blower for supplying the po-itive pressure to the atmosphere de~ired to encourage flow of the atmo~phere through the c,onducting tube~. The motor driving the wiper conveyor 24 1- set into op ration 80 that the lower run 41 will move the wiper,element 51 toward~ the sump 26 and the upper run 42 will mov th- wiper lement- over th- conducting tubes 29 The in-feed conveyor 22 and product conveyor 21 aro both oper~ted for carrying product through the fryer 10 Mean~
in the stack 31 to control the draft from the third manifold 38 is ad~u-ted to provid optimum flow of gases through th-' manlfold ~ection- w that th- hot atmosphore will flow from th- comb w tion ch~mber 13 through the two first manifold 32 through th- fir~t et of conducting tube- 36 into tho ~econd manlfold 3~ Th- hot atmosphero then flows through the secona -t 37 of th- conducting tube- through to the third manlfol~ 38 ~nd thence to th- tack 31 Throughout the pas~age of the hot ga~ heat iB released to the cooking oil, thereby ~chieving substantlal efficiency in use of any fuel~ or electrical energy, a~ the c~e may be wlth the burner me~n~ suppliod.

The fines carried into the sump are treated as described above being swept along with the oil flow toward the ~tationary ~creen which is swept by the ~light 67 for continuous cleaning with the fines being depo~ited outside of the cooker 10.

There i~ shown in Figure 9 of the drawings a filter syRtem 70 which achieves the function of the filter sy3tem 27 described above and shown in Figures 7 and 8 and thu~ where the components are ~imilar to those shown in Figure~ 7 and 8 those shown in Figure 9 are indicated with ~prime" num-bers. The filter ~y~tem 70 may be located remotely from abody of liquid material to be filtered, such a~ the cook-~ng y~tem 10, but coupled to the body of llquid to be fllterea through th- lnlet plpe 71. A ~uction head is caused through the oil ~uction outlet 61~ which is coupled to a positive displacement suctlon pump ~not shown). The effect of the pump i~ to maintain an oil flow ln the direction of the arrows as shown ln F~gure 9 through the plenum 63'. Thus, oil entering throu~h the outlet 71 i~
spread acros~ the stationary filter portion 62' which may compri~e a fines filter screen 65' or a layer of diatoma-ceo w earth 64' or f$1ter paper 69'. The continuow ly movable flightea conveyor 66' serve~ to ~weep the food partlcles or the like 60 along the ~urface of the filter bed to dlscharg- a~ ~hown. The fllght 67' 1- paced above the bod, for ex~mple V 16 of an inch, ln the conigura-tion a~ ~hown in Figure~ ~ ana 9, and thus thc filter media co~pri-e- not only the abov mentioned elements but al80 a ~ed of filterea food partlclos and the llke. One 1 1~9672 di~tinct advantage of the filter systom 70 i- that it may be coupled to ~n oxi~ting fryer without ~ubstanti~l modl-fication- to the unit and system The filter member 62 and 62' supply the mechanical str-ngth to ~upport the filter element~ 6~', 65', and 69' against the suction head of oil p~ssing through the filter The ~upport i~ ~ufficient to permit a build-up of a c~ke of entrained, flltered-out material and to permit that ma-teri~l to be re ved by ~hearing off with the flights or blades The system 70 may be used in connection with the w~ter re-moval ~y~tem di~clo~ed in U S Patent No 4,251,895 It will be ~pparent from the above that there h~ been di~-clo~ed an improved direct fired fryer system which may be lS constructed in different ~izes to roalize different capacity of foo4 treatment while yet retaining high effieieney in w e of fuol. Th~ heat tran-f~r area ub~tantlally incr-a~ed through heating of the bottom and ide wall~ of the cooking vat from tho eombu-tion ehamber and by condueting the heat-ing ga~es through conduct$on tube~ lmmersed in the cookingoil A combu~tion ehamber providea a~ ~hown in the dr~w-ing- give- ~mple volume for full combustion of the fuel enhanclng the efficieney of th- unit Further, the pre~enee of conductlng tubes within the vat materially reduce- the volu~e of eooking oil required and the pre~ence of the wiper ~y~te~ materially reduce- the contamination of the eooking oil by partlcle- of product whleh fall through th- product conveyor belt 21. The inventlon a- describea above 1 a fine~ by tho clalm~ whlch follow.

Claims (9)

What is Claimed is:
1. An improved, direct fired fryer for cooking foodstuffs, comprising a frame, means on said frame defining a combus-tion chamber, burner means serving to heat the atmosphere within said combustion chamber, means providing a cooking vat on said frame serving to hold a supply of cooking oil or the like and including a generally planar bottom wall serving as a heat transmitting member between said combustion chamber and the cooking oil within said container, first, second and third manifold means on said frame, said first manifold means being in communication with said combustion chamber, said first and second manifold means including a first set of heat conducting tubes extending therebetween, said second and third manifold means including a second set of heat conducting tubes extending therebetween, said sets of heat conducting tubes serving to transfer heat from the combustion chamber to the cooking oil and being disposed in said cooking vat below the nominal oil liquid level therein and above said bottom wall, means on said fryer providing an exhaust stack in communication with said third manifold means, said combustion chamber, manifold means, conducting tubes and exhaust stack communicating in a circuit so that the heated atmosphere from said combustion chamber traverses sequentially said first manifold means and first set of heat conducting tubes, said second manifold means and said second set of heat conducting tubes and thence through said third manifold means and the exhaust stack.
2. The fryer of Claim 1 and further including conveyor means serving to carry a product with respect to said cook-ing container, said conveyor being arranged with at least on run thereof disposed below the nominal oil liquid level and above said heat conducting tube means.
3. The fryer of Claim 2 wherein said product carrying con-veyor means includes infeed conveyor means and outfeed con-veyor means serving respectively to carry product into and out of said cooking container.
4. The fryer of Claim 1 wherein said combustion chamber means is substantially coextensive with said cooking con-tainer means, and wherein said sets of heat conducting tubes extend transversely to the path of said wiper conveyor means.
5. The fryer of Claim 1 wherein means defining a sump are provided arranged below the general plane of said bottom wall, wiper means arranged in said cooking vat and includ-ing a conveyor having a lower run serving to sweep fines along said bottom wall toward said sump means, and a top run of said conveyor serving to wipe the upper surfaces ] of said heat conducting tubes, thereby to reduce burn-on of carbonaceous materials on said bottom wall and conduct-ing tubes.
6. The fryer of Claim 5 wherein said sump means is equipped with a filter means, said filter means including a stationary filter member and a movable wiper means arranged above said stationary member and being adjustable to permit varying heights of filter media bed to be generated upon such stationary filter member.
7. A direct fired fryer for cooking foodstuffs, comprising a frame, means on said frame defining a combustion chamber, burner means serving to heat the atmosphere within said combustion chamber, means providing a cooking vat on said frame and including end, bottom and side walls serving to hold a supply of cooking oil therein, said combustion chamber and cooking vat being arranged such that the side wall portions of said cooking vat are spaced from the con-fronting side wall portions of said combustion chamber thereby providing a space therebetween, and means providing manifolds along the side wall of said cooking vat, one portion of said manifold means being in communication with said combustion chamber and another portion of said mani-fold means being in communication with an exhaust stack, and heat conducting tube means disposed in communication with said manifold means and being arranged in said cook-ing vat above the bottom wall thereof and disposed below the nominal cooking oil level, said manifold means and said conducting tube means communicating in a circuit so that the heated atmosphere from said combustion chamber traverses said manifold and conducting tube means en route to the exhaust stack.
8. The fryer of Claim 7 wherein said pan is equipped with a sump disposed below the general plane of the bottom wall of said vat, wiper means arranged in said cooking vat and including a conveyor having a lower run serving to sweep fines along said bottom wall towards said sump, and a top run of said conveyor serving to wipe the upper surface of said heat conducting tube means
9 The fryer of Claim 8 wherein said sump is equipped with filter means, said filter means including a stationary filter member and a movable wiper blade means arranged above said stationary member serving to shear material accumulated upon the stationary filter member, and discharge means arranged on said sump for receiving the sheared, filtered material.
CA000402122A 1981-05-04 1982-05-03 Direct fired fryer with wiper means Expired CA1169672A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US260,101 1981-05-04
US06/260,101 US4372200A (en) 1981-05-04 1981-05-04 Direct fired fryer with wiper means

Publications (1)

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CA1169672A true CA1169672A (en) 1984-06-26

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US (1) US4372200A (en)
EP (1) EP0064407B1 (en)
JP (1) JPS5832715A (en)
AT (1) ATE13967T1 (en)
AU (1) AU546280B2 (en)
CA (1) CA1169672A (en)
DE (1) DE3264410D1 (en)

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Also Published As

Publication number Publication date
EP0064407B1 (en) 1985-06-26
JPS5832715A (en) 1983-02-25
AU546280B2 (en) 1985-08-22
AU8326482A (en) 1982-11-11
EP0064407A3 (en) 1982-12-29
EP0064407A2 (en) 1982-11-10
US4372200A (en) 1983-02-08
DE3264410D1 (en) 1985-08-01
ATE13967T1 (en) 1985-07-15

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