DE3308014A1 - Circulation pump drive for dishwashers - Google Patents

Abstract

The circulation pump drive is intended to be distinguished by a simple and space-saving construction and is intended to prevent connection errors during installation in the dishwasher. To this end, a connection block (8) is inserted into a recess (7) in a motor bearing cover (6), which connection block (8) has plug contacts (9) or plug sockets which are connected to the motor winding as a correct-position, mechanical and electrical connection to a starting relay (11). <IMAGE>

Description

Circulating pump drive for dishwashers

The invention relates to a circulation pump drive for dishwashers, with an AC induction motor and a starting auxiliary device.

The known dishwashers have to drive the circulation pump an induction motor with a motor capacitor as a start-up or operating aid.

DE-AS 20 Ol 834 discloses a circulating pump drive with an alternating current squirrel cage motor known, the one switchable either in series with the main or auxiliary winding Has running capacitor.

In a known selector circuit for the washing pressure of a dishwasher, whose circulation pump is powered by an alternating current Asynchronous motor with squirrel cage is driven, a series connection in parallel with a first stator winding consists of a main capacitor and a second stator winding and is used to reduce torque Parts of the second stator winding in series with the first stator winding via a selector switch are switchable, an auxiliary skondensator is provided when the asynchronous motor is in operation with reduced torque via a selector switch parallel to the main capacitor is switchable (DE-OS 22 53 848).

The well-known AC motors with motor capacitors are designed in such a way that that of their working and the auxiliary winding, respectively, the beginnings and ends of the windings are led out as connecting lines. Such AC motors must be im generally be connected to the operating capacitor at the place of use. Although a trained specialist must be available for this work, it can be show that switching errors occur.

In addition, the capacitors usually used Take up a relatively large amount of space and require a lot of effort.

The invention is based on the object of a circulating pump drive for dishwashers to create that is less expensive and more space-saving is built as well as a fault-free connection even when using assistance guaranteed.

According to the invention this object is achieved in that in a recess of a motor bearing cover a connection block is inserted, the Plug contacts or sockets connected to the motor winding as correctly positioned, Has mechanical and electrical connection with a start relay. For assembly of one part of the auxiliary start-up device - usually by the engine manufacturer - Only the connection block with the motor winding ends connected and the connection block inserted into the bearing cap recess. When installing the motor in the dishwasher the connection of the start-up relay is established in the specified correct connection position made with the terminal block.

The error-free assembly of the connection block on the motor or

of the start-up relay on the connection block is achieved by the shape of the recess in the bearing cover and the shape of the connection block, the installation position of the connection block and by the arrangement and / or design of the plug contacts or sockets of the connection block and the arrangement and / or design of the Sockets or the plug of the start-up relay determine the assignment of the start-up relay to the Terminal block is determined.

The starting relay can be designed as a gravity relay through the arrangement and / or design of the direct plug-in connection between the start-up relay and terminal block ensures that the gravity relay is in the correct position hanging position is attached to the connection block.

According to a further embodiment of the invention, the motor bearing cover in the area of the outer contour of the recess an electrical connection between the starting relay and the Ansellluí3block at least partially covering the electrical Parts protective shield molded on.

There is a simple and expedient embodiment of the invention in that the motor winding wires are directly connected to those in the plastic terminal block, standing in an electrically conductive connection with the plug contacts or sockets Terminal block parts are connected, so that the use of additional Litz wires unnecessary.

An embodiment of the invention is described with reference to the drawing, which is a top view of the bearing cover and the connection block attached therein of the drive motor according to the invention and in a separate arrangement to be pluggable Starting relay shows.

The top view of the one for driving the drain pump of a dishwasher certain induction motor shows by a partially in its middle area recessed motor bearing cover 6 the rotor i of the motor, which is attached to the not visible, remote end an on a motor shaft 2 screwable impeller and on the visible Motor shaft end has a short-circuit ring 4. On those made of aluminum or an aluminum alloy injection-molded short-circuit ring, several fan blades 5 are injection-molded. Between the facing bearing cover 6 and a rear only visible in its outline Bearing cover 3 is a laminated core and the motor winding. The short-circuit ring 4 associated bearing cover 6 has several webs 10 in its central area, which form a cage over the fan blades 5.

A recess 7 is provided in the edge area of the motor bearing cover 6, the shape is designed so that one made of plastic existing Terminal block 8 can only be inserted into recess 7 in the correct arrangement.

In the embodiment, the terminal block 8, its electrical Parts can be connected directly to the ends of the motor winding, on its free Front plug contacts 9 in such an arrangement and / or training that a starting relay 11 with its mating contacts only in the predetermined arrangement can be coupled to the connection block.

To protect the connection block 8 and the connection to the starter relay 11, a shield 12 is formed on the edge of the bearing cover 6.

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Claims (4)

Claims circulation pump drive for dishwashers, with an AC induction motor and a starting auxiliary device, d a d u r c h e k e n n n n z e i c h n e t that in a recess (7) of a motor bearing cover (6) a connection block (8) is inserted, which is connected to the motor winding Plug contacts (9) or sockets as correctly positioned, mechanical and electrical Has connection with a starting relay (ii). 2. Circulation pump drive according to claim 1, characterized in that by the shape of the recess (7) of the bearing cover (6) and the shape of the connection block (8) the installation position of the connection block and the arrangement and / or design the plug contacts (9) or sockets of the connection block and the arrangement and / or Formation of the sockets or the plug of the starting relay (ii) the assignment of the start-up relay is intended for the connection block. 3. Circulation pump drive according to claim 1 and 2, characterized in that that the starting relay (11) is designed as a gravity relay and in that of the connection block (8) predetermined hanging arrangement plugged directly onto the connection block is. 4. Circulation pump drive according to claim 1 and 2, characterized in that that on the motor bearing cover (f) around the outer contour of the recess (7) an electrical Connection between your start-up relay (is) and the connection block (8) Shield (i ') is molded. :). Circulating pump drive according to claim i, characterized in that the motor winding wires directly to the ones in the plastic terminal block (8), with the plug contacts (9) or sockets in an electrically conductive connection Terminal block parts are connected.