JP2007181573A - Pump for dishwasher and dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump for a dishwasher, which has an inexpensive switching mechanism having a simple structure and facilitating the opening/closing operation. <P>SOLUTION: This pump 10 for the dishwasher comprises a motor part 11 and a pump part 12, the pump part 12 has a water intake 13 and a delivery port 14, a branch part 18 branched into water supply passages 16 and 17 communicating with washing nozzles 4 and 5 is provided in a passage from the delivery port 14, and a selector valve 20 opening/closing the plurality of water supply passages 16 and 17 is disposed in the branch part 18. The selector valve 20 is formed of a freely rotatable rotation body having a water passing part 24 and a water shutoff part 24, and the water passing part 24 opens at least one passage out of the plurality of water supply passages 16 and 17 according to the turning angle of the rotor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dishwasher pump and a dishwasher using the pump.

  In recent years, dishwashers have become more efficient by increasing the size of the dishwashing tank and using multiple washing nozzles to inject washing water from multiple directions in response to demands for improved washing performance or increased capacity for objects to be washed. Products that can wash typical dishes are popular.

In this type of dishwasher, washing nozzles for spraying washing water toward the dishes are provided at the lower and upper parts of the washing tank, and washing water is sprayed from the upper washing nozzle or from the lower washing nozzle. A variety of cleaning methods can be obtained, such as spraying or spraying cleaning water from the upper and lower cleaning nozzles at the same time. Such cleaning methods are selected by various switching methods. (For example, patent document 1).
JP 2003-339609 A

  However, the conventional switching method is, as described in the above document, a method in which a switching valve is provided at a branch portion of a water supply path for supplying cleaning water discharged from a cleaning pump to a plurality of cleaning nozzles, or in the middle of piping to each cleaning nozzle. A switching valve with a special structure or an expensive solenoid valve is used for such a switching valve, and a switching valve provided in the middle of the piping is complicated in piping and control system. Therefore, the increase in the number of parts is accompanied by the problem of hindering the cost increase, light weight and downsizing of the product.

  Therefore, the present invention is advantageous in reducing the cost, weight and size of the product by simplifying the piping in the dishwasher, which has a switching mechanism that is simple in structure, easy to open and close, and inexpensive. An object of the present invention is to provide a pump suitable for the dishwasher.

  The invention of claim 1 is a pump that is built in a dishwasher having a plurality of washing nozzles and is used to supply washing water, comprising a motor part and a pump part, wherein the pump part has a water suction port and a discharge port. A dishwasher pump comprising: a branch portion that branches into a water supply passage that communicates with the plurality of washing nozzles; and a switching valve that opens and closes the plurality of water supply passages is disposed in the branch portion. The switching valve includes a rotatable rotating body having a water passage portion and a water stop portion, and the water passage portion has at least one passage of the plurality of water supply passages according to a rotation angle of the rotating body. The dishwasher pump is characterized by being opened.

  According to a second aspect of the present invention, a position detection device that detects the rotation position of the rotating body is provided, and the opening and closing of the switching valve is controlled by interlocking the signal from the detection device with the rotational speed or on / off of the motor unit. The dishwasher pump according to claim 1, further comprising: a control unit configured to control the dishwasher.

  The invention of claim 3 is a pump that is built in a dishwasher having a plurality of washing nozzles and is used to supply washing water, comprising a motor part and a pump part, wherein the pump part has a water inlet and a discharge outlet. A dishwasher pump having a plurality of water supply passages extending from the discharge port to the plurality of washing nozzles, wherein the plurality of water supply passages are formed by a plurality of discharge pipes branched directly from the discharge port of the pump unit. In the dishwasher pump, the plurality of discharge pipes have switching valves for opening and closing the respective water supply passages.

  According to a fourth aspect of the present invention, there is provided the dishwasher pump according to the third aspect, further comprising a control unit that opens and closes the switching valve in conjunction with the rotation speed or on / off of the motor unit.

  The invention of claim 5 is a dishwasher characterized in that the dishwasher pump according to any one of claims 1 to 4 is used as a washing pump.

  According to the dishwasher pump of the present invention, the switching valve and its control circuit can be made inexpensive by simplifying the switching valve, and the piping around the pump to the washing nozzle is simplified. , Can shorten and reduce the number of parts of piping. As a result, it is possible to improve the performance of the dishwasher at a low price, a light weight and a small size.

  Embodiments of the present invention will be described with reference to the drawings.

[Description of dishwasher]
FIG. 1 is a schematic cross-sectional view showing the configuration of the dishwasher 100. The dishwasher 100 includes a dish washing tank 2 inside the outer frame main body 1, and in the washing tank 2, tableware baskets 3 a and 3 b for storing dishes are provided in two upper and lower stages. The lower cleaning nozzle 4 (a, b) is provided at the lower part of the cleaning tank 2 and two upper cleaning nozzles 5 (a, b) are provided at the upper part. The upper and lower cleaning nozzles 4, 5 are sprayed with cleaning water. It is provided so as to be rotatable by a reaction force, and the washing water is sprayed while rotating to clean dishes.

  A cleaning water tank 6 is provided below the cleaning tank 2. The washing water in the washing water tank 6 is sucked into the washing pump 7 and pressurized, and is sent to the upper and lower washing nozzles 4 and 5 for injection. The drainage pump 8 sucks the washed water after washing from the washing water tank 6 and drains it outside the machine. The cleaning pump 7 and the drainage pump 8 are driven by the motor unit 9 and cause the cleaning pump 7 and the drainage pump 8 to function individually depending on the rotation direction of the motor unit 9.

  In addition, a control device and panel switches for controlling the washing, draining, drying and the like of the dishwasher 100, a blower fan that sends dry air to the washed dishes, and a heater for heating the drying air and washing water Etc. are provided.

  The cleaning pump 7 supplies the suctioned cleaning water individually to the lower cleaning nozzle 4 and the upper cleaning nozzle 5 or simultaneously supplies the lower and upper cleaning nozzles 4 and 5 to each other. The cleaning water opening / closing means for opening and closing the supply of cleaning water is provided in the middle of the water supply passage from the discharge port of the cleaning pump 7 to each of the cleaning nozzles 4 and 5.

[First Embodiment]
A cleaning pump 10 according to the first embodiment shown in FIG. 2 includes a motor unit 11 and a pump unit 12. The pump unit 12 includes a water inlet 13 and a discharge port 14, and the water inlet 13 is a cleaning water tank 6. The discharge port 14 is connected to the lower cleaning nozzle 4 and the upper cleaning nozzle 5 through a water supply pipe 15, respectively.

  The motor unit 11 is not particularly limited, and a brushless DC motor, an induction motor, a synchronous motor, or the like can be used.

  An impeller is mounted on the rotating shaft of the motor unit 11, and the impeller is disposed in the pump chamber of the pump unit 12. The cleaning water of the cleaning tank 6 sucked from the water suction port 13 by the rotation of the impeller from the pump chamber. The cleaning water is sent to the discharge port 14, and the cleaning water is pumped to the upper and lower cleaning nozzles 4, 5.

  A water supply pipe 15 communicating with the upper and lower cleaning nozzles 4 and 5 is connected to the discharge port 14, and the water supply pipe 15 is connected to a water supply path 16 to the lower cleaning nozzle 4 and a water supply path 17 to the upper cleaning nozzle 5. A branching portion 18 that branches in a direction is provided, and a rotatable switching valve 20 that opens and closes the water supply passages 16 and 17 in two directions is housed in the branching portion 18.

  A position detection device 30 that detects the rotational position of the switching valve 20 is provided on the outer peripheral portion of the branching portion 18.

  As shown in FIGS. 3 and 4, the switching valve 20 is formed of a disk-shaped rotating body, and a slidable rotating shaft 21 penetrating the center portion is provided on the bearing portion 22 on the discharge port 14 side and on the water supply pipe 15 side. A flange portion 19 is provided that is fitted between the bearing portion 23 and rotatably supported, and on the inner peripheral side of the branch portion 18, the outer periphery of the rotating body of the switching valve 20 abuts.

  The switching valve 20 opens a water passage portion 24 formed of a through hole having a semicircular cross section in a disk-like portion, a symmetric position thereof is a water stop portion 25, and a magnet 26 for detecting a rotational position is embedded. ing.

  The rotation means of the switching valve 20 is not particularly limited. For example, the blade 27 protruding downward from the bottom of the rotating body as shown in FIG. For example, a stopper that uses a claw and a claw wheel and stops at every predetermined rotation angle while being rotated in a predetermined direction and pressed by washing water is used.

  FIG. 5 is a cross-sectional view taken along line AA in FIG. 4 (the position detection device 30 is omitted), and the openings of the water supply passages 16 and 17 leading to the cleaning nozzles 4 and 5 cross the pipe. The bearing portion 23 provided in this manner branches from the discharge port 14 in two directions and opens.

  In the configuration of the present embodiment, the switching valve 20 is rotated in the axial direction while rotating by the water pressure of the cleaning pump 10, and the switching valve 20 is locked at a predetermined rising position and rotating position by the flange portion 19, so This is a switching method, and the outer peripheral portion of the switching valve 20 abuts on the flange portion 19 to prevent water leakage in an unnecessary direction.

  As shown in FIG. 5A, when the water passage portion 24 of the switching valve 20 is positioned at the left rotation angle of the branching portion 18, the water supply passage 17 to the upper nozzle 5 is closed and the lower nozzle Washing water is supplied only to the lower nozzle 4 through the water supply passage 16 to 4.

  As shown in FIGS. 5 (b) and 5 (d), when the water passage portion 24 of the switching valve 20 is positioned at a rotation angle that straddles both the water supply passages 16 and 17, the connection to the lower nozzle 4 and the upper nozzle 5 is performed. Both water supply passages 16 and 17 are opened, and cleaning water is supplied to the lower nozzle 4 and the upper nozzle 5. However, since the inlets of the two water supply passages 16 and 17 are each closed by about a half portion by the water stop portion 25 of the switching valve 20, the wash water supplied to the respective nozzles is reduced.

  Further, as shown in FIG. 5C, when the water passing portion 24 of the switching valve 20 is positioned at the right rotation angle, the water supply passage 16 to the lower nozzle 4 is closed and the water supply passage 17 is passed through. Washing water is supplied only to the upper nozzle 5.

  In this case, since the water passing portion 24 of the switching valve 20 has a semicircular cross section, the rotational movement angle for opening and closing the switching valve 20 is performed at a double pitch of 90 degrees. While detecting the rotational position of the switching valve 20, the controller controls the washing water in conjunction with the on / off operation of the pump 10 according to the washing mode of the dishwasher 100 and the rotation speed of the motor (water pressure and supply amount of the washing water). The cleaning nozzle to be supplied and the amount of cleaning water can be set.

  Further, when the rotational movement angle of the switching valve 20 is performed at a shift pitch of 90/60/30/90/60/30 degrees, for example, the opening area of the water supply passages 16 and 17 to the lower nozzle 4 and the upper nozzle 5 The amount of cleaning water supplied to each cleaning nozzle can be adjusted by equalizing or changing the.

  With the above configuration, the switching valve can be manufactured with a simple structure at low cost, and the switching mechanism can be operated reliably. In addition, since switching can be performed in the vicinity of the pump, piping can be simplified, the number of parts can be reduced, and the dishwasher can be reduced in size, weight, and cost. Furthermore, the residual water in the piping is reduced.

[Second Embodiment]
The cleaning pump 50 according to the second embodiment shown in FIG. 7 includes a motor unit 51 and a pump unit 52, and the pump unit 52 includes a water inlet 53 and a discharge port 54, and the water inlet 53 is the cleaning water tank 6. The discharge port 54 is connected to the lower cleaning nozzle 4 and the upper cleaning nozzle 5 through water supply passages 58 and 59, respectively.

  The motor unit 51 is not particularly limited like the pump 10, and a brushless DC motor, an induction motor, a synchronous motor, or the like can be used.

  An impeller is mounted on the rotation shaft of the motor unit 51, and the impeller is arranged in the pump chamber of the pump unit 52. The cleaning water of the cleaning tank 6 sucked from the water suction port 53 by the rotation of the impeller from the pump chamber. The cleaning water is sent to the discharge port 54, and the cleaning water is pumped to the cleaning nozzles 4 and 5.

  The discharge port 54 has discharge pipes 56 and 57 that branch directly from the discharge port opening of the pump unit 52 and project in a bifurcated shape in two directions.

  The discharge pipes 56 and 57 are formed integrally with the resin casing 55 of the pump unit 52. Moreover, what connected the bifurcated discharge pipe which consists of another parts to the discharge outlet 54 may be used.

  The discharge pipes 56 and 57 are respectively connected to a water supply passage 58 that communicates with the lower cleaning nozzle 4 and a water supply passage 59 that communicates with the upper cleaning nozzle 5, and switching valves 61 and 62 that open and close the passage are provided at the connection portions. Yes.

  The switching valves 61 and 62 use solenoid valves and are connected to a control circuit provided in the dishwasher 100, and are linked to the on / off state of the pump 50 and the rotational speed of the motor according to the washing mode of the dishwasher 100. Then, one or both of the switching valves 61 and 62 are opened and closed, and the cleaning water is sprayed from the lower cleaning nozzle 4 only, the upper cleaning nozzle 5 only, or the upper and lower cleaning nozzles 4 and 5 simultaneously. it can.

  By switching the switching valves 61 and 62 in conjunction with the number of rotations of the motor 51, for example, when a large amount of tableware is used, the cleaning water is sprayed from the upper and lower nozzles 4 and 5 and the amount of the cleaning object is small. It can contribute to energy saving by reducing the number of rotations and washing with a small amount of washing water.

  With the above configuration, the piping distance from the pump to each cleaning nozzle can be minimized to simplify the piping and reduce the number of parts. Therefore, the dishwasher can be reduced in size, weight, and cost. .

  The dishwasher pump of the present invention is suitable for a dishwasher.

It is a schematic sectional drawing which shows the principal part structure of a dishwasher. It is the schematic of the pump of 1st Embodiment. It is a longitudinal cross-sectional view of the switching part of a pump discharge port same as the above. It is a top view of a switching valve. It is the schematic which looked at the AA line cross section in FIG. 3 from upper direction. It is a bottom view which illustrates the rotation mechanism of a switching valve. It is the schematic of the pump of 2nd Embodiment. It is a longitudinal cross-sectional view of the switching part of a pump discharge port same as the above.

Explanation of symbols

4, 5 ... Cleaning nozzle 10 ... Pump 11 ... Motor unit 12 ... Pump unit 13 ... Water intake port 14 ... Discharge port 16, 17 ... Water supply passage 18 ... Branching unit 20 ... Switching valve 24 ... ... Water passage 25 ... Water stop

Claims (5)

A pump that is built in a dishwasher having a plurality of washing nozzles and is used to supply washing water,
It consists of a motor part and a pump part.
The pump unit has a water inlet and a discharge port,
A branching portion branching into a water supply passage leading to the plurality of cleaning nozzles is provided in the passage from the discharge port,
In the dishwasher pump provided with a switching valve for opening and closing the plurality of water supply passages at the branch portion,
The switching valve comprises a rotatable rotating body having a water passage portion and a water stop portion,
The dishwasher pump, wherein the water passage portion opens at least one of the plurality of water supply passages according to a rotation angle of the rotating body. A position detection device that detects a rotation position of the rotating body, and a control unit that controls the opening and closing of the switching valve by linking a signal from the detection device with the rotation speed or on / off of the motor unit. The dishwasher pump according to claim 1, wherein A pump that is built in a dishwasher having a plurality of washing nozzles and is used to supply washing water,
It consists of a motor part and a pump part.
The pump unit has a water inlet and a discharge port,
In the dishwasher pump having a plurality of water supply passages leading from the discharge port to the plurality of washing nozzles,
The plurality of water supply passages are formed by a plurality of discharge pipes branched directly from the discharge port of the pump unit,
The plurality of discharge pipes have switching valves that open and close the respective water supply passages. The dishwasher pump according to claim 3, further comprising a control unit that opens and closes the switching valve in conjunction with the rotation speed or on / off of the motor unit. The dishwasher pump according to any one of claims 1 to 4, wherein the dishwasher pump is used as a washing pump.

Images