JPS6326136Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to dishwashers, and particularly relates to an improvement in the structure of a float switch for controlling the water level of dishwashers.

(B) Prior Art Conventionally, a float switch for controlling the water level of a dishwasher detects the water level by providing an independent chamber on the outer surface of the lower side wall of the washing tank and guiding water through a water channel. However, this configuration has the disadvantage that it takes up space, increases the size of the product, and increases cost.

Furthermore, with conventional float switches, the float of the float switch is always located in still water, so food scraps and oils and fats adhere to it over long periods of use, eventually interfering with the vertical movement of the float and controlling the water level. There were also problems that caused problems.

(c) Purpose This invention was made in view of the above points, and is intended to provide a dishwasher in which a float switch can be easily accommodated.

Furthermore, the present invention aims to provide a dishwasher in which the float of the float switch operates reliably even during long-term use.

(d) Structure In this invention, a float switch for controlling the water level of the cleaning tank is integrated into the drain pump, and the float of the float switch is further provided to be rotated by the drain flow.The detailed structure is as follows. , a cleaning tank equipped with a nozzle that sprays cleaning water and rinsing water, a water supply mechanism that supplies water into the cleaning tank, and a circulation supply mechanism that circulates and supplies the cleaning water and rinsing water stored in the cleaning tank to the nozzle; In a dishwasher equipped with a drain pump for discharging washing water and rinsing water in a washing tank to the outside, the drain pump is provided at a position corresponding to a predetermined storage level of the washing tank, and a float and a case for the drain pump are provided. It is equipped with a float switch that controls the water level of the cleaning tank, consisting of a storage case for the float that communicates with the storage case, and a reed switch that is installed in the storage case and is activated as the float moves up and down. This is a dishwasher in which this float is attached with a rotating blade that can be rotated within a storage case by the flow of drainage water.

(e) Examples Examples of this invention will be described below in detail with reference to the drawings, but this invention is not limited to the following examples.

The overall structure of the dishwasher will be briefly explained with reference to FIG.

In the dishwasher 1, a cleaning tank 3 is attached to a base 2,
A lid 4 is attached on top of the cleaning tank 3 to form its outer shape. A nozzle 5 is rotatably provided at the bottom of the cleaning tank 3. Base body 2 below cleaning tank 3
A circulation pump 6 serving as a circulation supply mechanism is provided inside the cleaning tank 3.
Washing water and rinsing water stored in the dish basket 7 are circulated and supplied to the nozzle 5, and the washing nozzle 5 rotates and sprays the washing water and rinsing water to wash and rinse the dishes in the tableware basket 7. 8 constitutes a drying mechanism with a blower. 9 is a drainage pump which is a drainage mechanism; 10 is a control unit; 11 is a water supply valve which is a water supply mechanism; 12 is a heater for increasing the temperature of washing water and rinsing water; 13 is an operation unit;
An exhaust port 14 for blowing air by the blower 8 is provided.

The dishwasher 1 sequentially washes, rinses, and dries dishes according to commands from a control section 10. Commands to the control section 10 are performed by operating buttons on an operation section 13.

The configuration of the drainage pump 9, which is a characteristic configuration of this invention, will be explained below with reference to FIG.

As shown in FIG. 1, the drain pump 9 is provided at the lower side of the cleaning tank 3 in order to correspond to a predetermined storage level of the cleaning tank 3. A drain pipe 15 from the bottom of the cleaning tank 3 and a drain pipe 15 led outward are connected to the drain pump 9, respectively. 1
Reference numeral 6 denotes a motor, which is integrally provided at the upper part of the drain pipe 9 and has its rotating shaft 17 protruding into the drain pump 9. The outer shape of the drain pump 9 is composed of a lower case 18, an upper case 19, and a storage case 21 for a float switch 20. The upper case 19 has a cylindrical portion 22 that projects upward, and the end of the rotating shaft 17 is inserted into the cylindrical portion 22 . Reference numeral 23 denotes an impeller, which has an elongated boss portion 24 at the top, in which the end of the rotating shaft 17 is embedded and fixed, and the motor 1
6 causes the impeller 23 to rotate. The storage case 21 consists of a large-diameter cylindrical portion 25 and a lid portion 26. The cylindrical lower portion 28 of the float 27 of the float switch 20 is located inside the cylindrical portion 25, and the cylindrical lower portion 28 of the float 27 of the float switch 20 is located inside the narrow-diameter cylindrical portion 29 of the lid portion 26. The rod-shaped upper part 30 of the float 27 is located at. There is a reed switch 3 on the top 30.
A magnet 32 is attached to operate the magnet 1. The reed switches 31 are attached to the outer surface of the cylindrical portion 29 in three stages. Both the upper and lower reed switches 31 are connected to the drain pump 9,
The middle reed switch 31 is connected to the water supply valve 11.

The space in which the impeller 23 and the float 27 exist communicate with each other as shown in FIG. 3. That is, when the impeller 23 rotates and drains water, the float 27 receives water pressure from the water flow. Four rotating blades 33 are integrally provided on the lower surface of the lower portion 28 of the float 27. That is, the float 27 rotates when the rotating blades 33 receive the above-mentioned water pressure.

Below, the float switch 20 in the above embodiment
Let me briefly explain how it works.

When the water supply valve 11 is opened and water is injected into the cleaning tank 3 during cleaning, the water level in the drain pump 9 also rises in the same way as the water level in the cleaning tank 3. When the float 27 rises and its magnet 32 approaches the middle reed switch 31 and turns it ON or OFF, the reed switch 31 sends the signal to the water supply valve 11 to stop the water supply. If the water supply valve 11 is out of order, the water level will rise further and the magnet 32 will move closer to the upper reed switch 31 to operate it, and the reed switch 31 will send a drain start signal to the drain pump 9 to start draining. This prevents water from overflowing from inside the cleaning tank 3. The lower reed switch 31 serves to notify the drainage pump 9 of the completion of general drainage and to stop the drainage.

(f) Effects This idea is structured as described above, so
If the drain pump is installed in a predetermined position, a float switch can be installed at the same time, which reduces the number of parts, making it possible to provide the system at a lower cost and simplifying the manufacturing process. Of course, compared to conventional float switches, the float switch does not require a separate installation space, so the entire product is made smaller.

Furthermore, the float of the float switch is exposed to flowing water in the drain pump, and is rotated by the presence of rotating vanes, which prevents food scraps and oils from adhering to the float, ensuring normal up and down movement of the float. is ensured.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of an embodiment of this invention, FIG. 2 is a longitudinal cross-sectional view of the same main part, and FIG. 3 is a schematic view of the main part opened at the bottom. 1...Dishwasher, 3...Washing tank, 5...Nozzle, 6...Circulation pump (circulation supply mechanism), 9...
Drain pump, 11... Water supply valve (water supply mechanism), 20
...Float switch, 27...Float, 31
Reed switch, 33...Rotating blade.

Claims (1)

[Scope of claim for utility model registration] A cleaning tank equipped with a nozzle that sprays cleaning water and rinsing water, a water supply mechanism that supplies water to the cleaning tank, and circulation of the cleaning water and rinsing water stored in the cleaning tank to the nozzle. In a dishwasher equipped with a circulation supply mechanism and a discharge pump for discharging washing water and rinsing water in a washing tank to the outside, the drain pump is provided at a position corresponding to a predetermined storage level of the washing tank, and It is equipped with a float, a storage case for the float that communicates with the case of the drainage pump, and a reed switch that is installed in the storage case and is activated as the float moves up and down.The float switch controls the water level in the cleaning tank. A dishwasher in which a rotary blade is attached to the float of the float switch so that the float can be rotated within a storage case by the drainage flow.