JPS5851885Y2 - Dishwasher water supply control - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a float device for detecting the amount of water supplied in a water supply control device for a dishwasher.

The structure of a dishwasher to which the float device of the present invention is applied will be explained with reference to FIG.

1 is the main body of the dishwasher, 2 is a washing tank, 3 is a circulation pump, and a discharge pipe 4 is fixed to the bottom plate 2' of the washing tank 2, and a horizontal nozzle 6 and a tower nozzle 7 are rotatable by a coupling 5. It is installed on.

A suction pipe 8 of the circulation pump 3 sucks the cleaning liquid in the cleaning tank 2 from a pocket 9 provided in the bottom plate 2' of the cleaning tank 2 through a filter 10.

11 is an electric motor for driving the circulation pump 3.

12 is a water supply valve that supplies water to the cleaning tank 2; 13 is a drain pump that drains the cleaning liquid in the cleaning tank 2 from the pocket 9; 14;
is its driving electric motor.

15 is an opening/closing door, 16 is an upper tableware basket, 17 is a lower tableware basket, 18 is a water supply hose, and 19 is a drain hose.

20 is a float device that detects the water level in the cleaning tank 2, and controls the water supply valve 12 based on its output.

Next, a conventional float device to which the present invention is improved will be explained with reference to FIG.

Reference numeral 21 is a main body of an inverted cup-shaped float having a central axis 22, and an inner chamber 24 is divided into an outer chamber 25 by a concentric partition plate 23 centered on the central axis 22.

Reference numeral 26 denotes a shaft cylinder which is provided vertically through the bottom plate 2' of the cleaning tank, and its upper end is open above the cleaning liquid level in the cleaning tank 2, and its lower end is communicated with the outside air under the bottom plate 2'. .

The central shaft 22 is fitted into a shaft cylinder 26, and its lower end abuts against a contact plate 28 of a microswitch 27, thereby holding the float main body 21.

In Figure 2 A, there is no cleaning liquid in the cleaning tank 2, and the float body 2
1 is applied to the contact plate 28, and the micro switch 2
7 shows a state when the circuit of the water supply valve 12 is closed and water is supplied to the cleaning tank 2.

As the water supply progresses and the water level in the cleaning tank 2 rises, the float main body 21 rises accordingly, and when a predetermined water level is reached, the lower end of the central shaft 22 separates from the contact plate 28 and the microswitch 2T turns off. , stop the water supply.

However, when the above-mentioned float device is used, as shown in the opening in Figure 2, when foaming occurs in the cleaning water 29, the foamed water 30 rises along the shaft tube 26 and enters from the upper end of the tube to the outside of the cleaning tank. and contaminates and deteriorates parts.

If foamy water discharged by the octopus reaches the microswitch 27, it may cause an accident such as poor insulation.

The object of the present invention is to provide a float device that does not have these drawbacks.

An embodiment of the float device of the present invention will be described with reference to FIG.

31 is an inverted cup-shaped float main body having a central axis 32, and a recess 33 is provided in a part of the upper periphery of the float to accommodate the magnet 3.
4 is inserted.

On the other hand, a bottomed shaft cylinder 35 into which a central shaft 32 is fitted is provided upright on the bottom plate 2' of the cleaning tank 2.

This shaft cylinder 35 is provided at a position where the side surface of the float main body 31 moves up and down along the side wall 36 of the cleaning tank.

37 is a microswitch attached to the route where the magnet 34 moves up and down along the side wall 36, and its height is set at a position opposite to the magnet 34 when the water level of the cleaning liquid in the cleaning tank reaches a predetermined level.

Figure 3A shows the case where there is no cleaning liquid in the cleaning tank.
Since the float main body 31 is lowering due to its own weight, the magnet 34 is separated from the microswitch 37.

Therefore, the micro switch 31 is turned on and the water supply valve 1 is turned on.
Water is supplied by 2.

As the water supply progresses, the float main body 31 floats up and reaches a predetermined water level, and when the magnet 34 reaches the position of the microswitch 37 as shown in FIG. 3, the microswitch 37 is turned off and the water supply is stopped.

As described above, the water supply control device of the present invention has a bottomed shaft cylinder 35 upright on the bottom plate 2' of the cleaning tank 2, and an inverted cup-shaped float having a central shaft 32 that fits into the shaft cylinder 35. A recess 33 is provided in a part of the upper periphery of the main body 31, and the magnet 3
4, and a microswitch 37 facing the magnet 34 is provided on the side wall 36 of the cleaning tank close to the float main body 31, and the water supply valve 12 that supplies water to the cleaning tank 2 is controlled by opening and closing the microswitch. Therefore, the water level in the cleaning tank is automatically controlled by a float device including a magnet 34 and a microswitch 37.

Moreover, this float device is separated from the microswitch 37, and its shaft cylinder 35 has a bottom, unlike the conventional shaft cylinder 2 in FIG.
6, there is no communication with the outside, so there is no leakage of cleaning liquid to the outside.

Therefore, it is possible to provide a water supply control device for a dishwasher equipped with a float device that does not cause accidents due to liquid leakage and eliminates the above-mentioned drawbacks of conventional float devices.

[Brief explanation of the drawing]

Figure 1 shows the overall structure of a dishwasher. Figure 2 shows a conventional float device.
Figure 3 shows the float device of the present invention, A is when there is no flushing water, and the mouth is when there is flushing water. 1...Main body, 2... ...Cleaning tank, 3...
...Circulation pump, 6...Horizontal nozzle, T...
... Tower nozzle, 12 ... Water supply valve, 20
...Float device, 31 ... Float main body, 32 ... Central axis, 33 ... Concavity, 34 ... Magnet, 35 ... ...Axis tube, 36...Side wall, 37...Micro switch.

Claims (1)

[Scope of utility model registration request] A shaft cylinder with a bottom is provided upright on the bottom plate of the cleaning tank, and four parts are provided around the upper part of an inverted cup-shaped float main body having a central shaft that fits into the shaft cylinder, and a magnet is fitted into the main body of the float. A water supply control device for a dishwasher, characterized in that a microswitch facing the magnet is provided on a side wall of a washing tank adjacent to the washing tank, and opening and closing of a water supply valve that supplies water to the washing tank is controlled by opening and closing of the microswitch by the magnet. .