JPH11113828A - Pump and tableware washing machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water leakage from a delivery port blocked up by a valve element by installing an elastic body on a surface of a directional control valve in a pump having the directional control valve capable of opening or blocking-up a two-way delivery port formed in a casing cover. SOLUTION: In a pump to perform washing and drainage in a tableware washing machine, the flowing direction of fluid in a casing 101 is changed by reciprocally rotating an impeller 104 of the pump. Therefore, a valve element 105 is rotated by changing the direction of pressure applied to the valve element 105, and washing and drainage are switched by alternately blocking up a wash water delivery port 102 and a waste water delivery port 103. That is, the valve element 105 blocks up the waste water delivery port 103 by a fluid flow when the impeller 104 rotates in the clockwise direction. At this time, water leakage from the waste water delivery port 103 is prevented by sealing the waste water delivery port 103 by an elastic body 106 installed in the valve element 105. When the impeller 104 starts rotation in the anticlockwise direction, fluid strikes on the valve element 105, and the valve element 105 rotates by its pressure, and blocks up the wash water delivery port 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly to a dishwasher which is mounted in a casing or a casing cover of a single pump to which the power of an electric motor is transmitted by rotating the impeller forward and reverse. The present invention also relates to a dishwasher having a valve for switching a flow at at least two directions of discharge ports.

[0002]

2. Description of the Related Art A switching valve used in a conventional pump or the like includes:
For example, as described in Japanese Patent Application Laid-Open No. Sho 60-26199, two discharge ports are closed by a single substantially flat valve body. This valve body is for rotating the pressurized fluid in the pump casing forward and backward by rotating the impeller under the influence of the pressurized fluid and discharging the fluid from desired discharge ports. .

[0003]

However, in the technique disclosed in Japanese Patent Application Laid-Open No. Sho 60-26199, since the valve body is substantially flat, a pump having two or more discharge ports is used. When applied to the disposed dishwasher, impurities such as fine food debris peculiar to the dishwasher enter between the valve body and the discharge port wall, and the valve body cannot fully adhere to the discharge port wall, so that the washing water is removed. Water leaks from the discharge port, and when this discharge port is a drain discharge port, it is discharged out of the air, resulting in a problem that the amount of cleaning water is insufficient and cleaning is poor.

An object of the present invention is to solve the above-mentioned problems, and to provide a dishwasher in which a valve body is in close contact with a discharge port, prevents water leakage from a closed discharge port, and has a stable operation.

[0005]

In order to achieve the above object, the present invention is characterized in that a casing and at least two casings formed on the casing or the casing cover are provided.
Directional discharge port, an impeller disposed in the casing, a switching valve capable of opening or closing the discharge port, and a driving means for driving the impeller, wherein a surface of the switching valve In that an elastic body is attached. Furthermore,
A feature of the invention resides in a dishwasher using the pump in addition to the above features.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a dishwasher will be described as an example. In the drawings, the same components are denoted by the same reference numerals. 4 and 5, the main body 401 of the dishwasher has an opening / closing door 402 in an upper opening portion, and has a dish storage tank (hereinafter, storage tank) 501 inside. The storage tank 501 has a tableware storage basket (hereinafter, storage basket) 502 for storing tableware.

The storage tank 501 has a circulating water jet nozzle (hereinafter, nozzle) 503 for discharging circulating water in the process of washing dishes. Further, a pump 504 for pressurizing the circulating water is provided below the storage tank 501. The pump 504 includes an electric motor 506 connected by a shaft 505.
Driven by 507 is a water tank to a storage tank 50.
It is a water supply valve for supplying water to 1.

Next, the operation of the dishwasher according to one embodiment of the present invention will be described with reference to FIGS.

In the washing process of tableware, water is supplied from a water supply valve 507 and stored to a predetermined position. The circulating water stored in the storage tank 501 is heated by a heater (not shown) to become hot water. The circulating water heated by the heater and turned into hot water is pressurized in the pump 504 to which the power of the electric motor 506 is transmitted, and the washing water outlet 50
8 and is sent to the nozzle 503. The supplied circulating water is jetted from the nozzle 503 to wash the dishes stored in the storage basket 502 and drop into the storage tank 501. The circulating water dropped into the storage tank 501 is pressurized again in the pump 504 and sent to the nozzle 503.

Next, the drainage process of the circulating water will be described. The impeller 509 is rotated in the direction opposite to the direction of the washing to guide the circulating water to the drainage hose 510 and discharged out of the dishwasher 401.

[0011] After the circulating water is discharged out of the machine, the drying process of the tableware is started.

As described above, the dishwasher of this embodiment is
Washing and drainage are performed by one pump. When such a pump is used, for example, when shifting from the washing process to the draining process, it is necessary to rotate the valve body in the pump 504 and switch the water outlet in the pump. The means for switching will be described below.

FIGS. 1 to 3 show longitudinal sectional views of a pump 504 according to an embodiment of the present invention.

1 to 3, reference numeral 101 denotes a pump casing according to an embodiment of the present invention. The casing 101 includes a washing water discharge port 102 and a drain discharge port 103.
Having. 104 is an impeller, 105 is a valve for switching the discharge port, and the valve 105 has an elastic body 106. The valve body 105 rotates around a shaft 107.

Switching between washing and drainage is performed as follows.

By rotating the driving direction of the electric motor forward and reverse, the impeller 104 of the pump is rotated forward and reverse, and by changing the flow direction of the fluid in the casing 101, the pressure direction of the valve body 105 is changed. Then, the valve body 105 is rotated. By rotating the valve body 105 to alternately close the washing water discharge port and the drainage discharge port, cleaning and drainage are switched. The details of the operation are as follows.

First, in FIG. 1, the impeller 104 is rotating clockwise. At this time, due to the flow of the fluid due to the rotation of the impeller, the valve body 105 is at a position where the drainage outlet 103 is closed.

Also, from this state, when the impeller 104 comes to a standstill and the impeller 104 starts rotating in the opposite direction, ie, counterclockwise as shown in FIG. , The valve body 105 rotates and closes the washing water discharge port 102. As a result, the fluid is guided to the drain hose 510 through the drain outlet 103, and is discharged outside the machine.

According to this embodiment, when the valve 105 is on the drain outlet 103 side (FIG. 1), the valve 105 closes the drain outlet 103 and releases the washing water outlet 102. Thus, the circulating water is discharged from the cleaning water discharge port, and the cleaning water is supplied to the nozzle 503 in the tableware storage tank 501.

At this time, the elastic body 106 attached to the valve body 105 seals the drain discharge port 103,
Water leakage from the drainage discharge port 103 is prevented.

The elastic body is similarly attached to the cleaning water discharge port 102 side as shown at 301 in FIG. 3 so that when the cleaning water is drained from the drain discharge port 103, the water leaks from the cleaning water discharge port 102. As a result, efficient drainage can be realized, and the effect of reducing the remaining amount of washing water remaining in the dishwasher after one cycle of operation can be expected.

[0022]

According to the present invention, the valve body is provided with an elastic body,
By adhering the elastic body to the discharge port, it is possible to prevent leakage of cleaning water from the discharge port.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a pump according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a pump according to one embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a pump according to one embodiment of the present invention.

FIG. 4 is a perspective view showing the overall appearance of the dishwasher according to one embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of the dishwasher according to one embodiment of the present invention.

[Explanation of symbols]

101 ... casing, 102 ... washing water discharge port, 103 ...
Drainage outlet 104, impeller 105, valve body 106,
301: elastic body, 501: tableware storage tank, 502: tableware storage basket, 503: circulating water injection nozzle, 504: pump, 5
06 ... motor, 508 ... wash water discharge port, 510 ... drain hose.

 ──────────────────────────────────────────────────の Continuing from the front page (72) Fumio Takahagi 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Pref.

Claims (2)

[Claims] 1. A casing, and a discharge port in at least two directions formed in the casing or the casing cover.
In a pump having an impeller disposed in the casing, a switching valve capable of opening or closing the discharge port, and a driving unit for driving the impeller, an elastic body is mounted on a surface of the switching valve. A pump characterized in that: 2. A dishwasher using the pump according to claim 1.