JPS59120921A - Float of tableware washing machine - Google Patents

Abstract

PURPOSE:To prevent residua from sticking to a float, by dividing the float to air chamber parts and gap parts of float guides and connecting them with several ribs and flowing washing water around the float and float guides to give the self-washing function to the float during the operation of tableware washing. CONSTITUTION:A float 14 is constituted of air chamber parts 14a and gap parts 14b covering float guides 13, and they are connected into one body with several ribs 14c. Plural slits 21a are formed on the upper face of a float cover 21. When water is supplied into a washing tank 2 to start the washing step, oil and residua included washing water are stuck to the float 14 and float guides 13. However, the washing water always flows around the float and insides of float guides and the float cover in this invention to wash these parts, and therefore, they are always washed in washing and rinsing steps, and residua and oil are not stuck to them after the end of one cycle, and thus, the operation defect of the float is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in a float for detecting water level in a dishwasher.

[Prior art]

Conventionally, pressure cusp inches and float switches have been used to detect the water level in dishwashers, but the use of float switches is increasing due to their ability to detect low water levels, reliability, and cost. However, this float sinch had the following drawbacks.

In other words, due to water level fluctuations during dishwashing operation, oil and residue contained in the washing water gradually accumulate around the float and float guide, making it impossible for the float to float up and water level detection to occur. The problem is that the water supply continues and the water temperature becomes too high.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a float which has a cleaning action and is free from the adhesion of residues, in order to solve the above-mentioned problems.

[Summary of the invention]

In order to achieve the above object, the present invention divides the float into an air chamber and a float guide cap, and connects them with several ribs to distribute cleaning water around the float and float guide. It has a self-cleaning effect while running the sink and dishes, eliminating the buildup of residue.

Example An actual case of the present invention will be described below with reference to the drawings.

In the figure, l is an outer frame that houses the cleaning tank 2, and the front part is
A door 3 is provided for taking dishes in and out of the washing tank 2.

4 is a water supply solenoid valve installed between the outer frame 1 and the cleaning tank 2;
It is opened by a command from a timer 5 and closed by a signal from a float switch 6.

7 is a water supply pipe communicating with a water faucet.

Inside the washing tank 2, dish baskets 8 for storing dishes are removably installed in two stages, upper and lower. Below each dish basket 8, an upper nozzle and a lower nozzle 10 that rotate in a horizontal plane are arranged. has been done.

The lower nozzle 10 is rotatably attached to the discharge port of a circulation pump 11, and the circulation pump 11 is driven by an electric motor 12 provided below the cleaning tank 2.

A float 14 passes through a float guide 13 installed at the bottom of the cleaning tank 2 and is connected to an operation frame 15, and the float switch 6 is interlocked with the float 14 via a switch lever 16.

Switch lever 16 and float switch 6ti cleaning tank 2
It is attached to the switch base 17 on the bottom surface of the switch. 1
9 is a fulcrum of the switch lever 16. 20 is a stopper to prevent vibration since the float does not come out.

Further, as shown in the figure, the float 14 is composed of an air chamber part 14a and a camp part 14b that covers the float guide 13, which are connected and integrated by several lips 14c.Furthermore, 21 is a float cover. A plurality of cylinders 21a are formed on the upper surface of the door.

Next, we will show the operation in normal operation.

When the timer 5 is set, the water supply solenoid valve 4 opens and the cleaning tank 2 is opened.
Supply water inside. Fu D-114 rises with the water level,
When the specified value is reached, the float switch 6 is operated to close the water supply solenoid valve 4 and the cleaning process can begin.

At this time, the water level in the cleaning tank 2 is undulating or splashing due to the influence of the water jetted from the arm nozzle 9°lO, and the oil and residue contained in the cleaning water are floating in the float 14.
．． It adheres around the float guide 13. Fig. 4 shows the structure of a conventional float. In this structure, residues and oils and fats that get stuck between the outer circumference of the float and the inner surface of the float cover, and between the inner surface of the float and the outer circumference of the float guide gradually disappear. and due to friction between them,
Even when the water level reached the specified level, the float would not rise, resulting in water supply continuing, and in the worst case scenario, the dishwasher would get wet and water would overflow outside the dishwasher, leading to a major accident.

However, in the present invention, as shown in Fig. 3, the washing water constantly flows around the float, the float guide, and the inner surface of the float cover to clean these parts, so the dishwasher's washing and washing processes are always carried out. After being cleaned and completing one cycle, there will be no residue, oil or fat attached, and the float will no longer malfunction as in the past.

The purpose of the float cover 21 is to prevent tableware or the like from falling and pressing against the float, thereby preventing the float from floating.

〔Effect of the invention〕

As described above, according to the present invention, the area around the float is constantly cleaned during the operation of the dishwasher 1, eliminating the adhesion of residues, oils, etc. that may cause malfunction, and enabling stable water level detection. It is effective to provide.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view schematically showing the structure of a dishwasher, Fig. 2 is a detailed view of the float section showing an embodiment of the present invention, and Fig. 3 F
i, a sectional view taken along line III--III in FIG. 2, and FIG. 4 a detailed view of a conventional float section.

Claims (1)

[Claims] 1. A float for water level detection is attached to the bottom of the washing tank, and in a device that detects the water level for washing dishes, the float is divided into an air chamber and a cap that covers the float guide, and both are connected to a multi-tube lip. A dishwasher float characterized by being integrated with.