JPS633831A - Water feeder of tableware washer - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water supply device for a dishwasher or the like that has an improved water amount detection section that detects the amount of water supplied to a washing tank.

(Prior Art) Conventionally, there has been provided a dishwasher that is equipped with a washing tank inside the main body and supplies water to the washing tank through a water supply pipe connected to a water supply device. In this type of dishwasher, in order to control the amount of water supplied in the washing tank, for example, a water level switch is provided as a water amount detection means to detect the water level in the washing tank and control the amount of water supplied. Water supply is controlled by a timer device.

(Problem to be Solved by the Invention) However, in the case of the above-mentioned water level switch, it is impossible to accurately detect the water level because the water level changes drastically during the washing or rinsing process. If the water level is too low, water level detection becomes difficult. In addition, in the case of a timer device, if the pressure of the water flowing inside the water supply pipe is not always constant, the amount of water supplied will increase (change).

Therefore, the present invention has been made in consideration of the above circumstances, and an object thereof is to provide a water supply device for a dishwasher or the like that can accurately detect the amount of water supplied into a washing tank and supply appropriate water. .

[Structure of the Invention] (Means for Solving the Problem) In order to solve the above problems, the present invention forms a magnetic field perpendicular to the water supply pipe connected to the water supply device, and also creates a magnetic field orthogonal to this magnetic field. A water amount detection section with an electrode provided at a position, and a central control section connected to the water amount detection section and the water supply device were provided.

(Function) According to the above means, a voltage proportional to the amount of water flowing in the water supply pipe is generated at the electrode of the water amount detection section, and this voltage is converted into a predetermined electric signal by the central control section, and the voltage is converted into a predetermined electric signal and used as the predetermined water supply amount data. The water 2 in the water supply device was controlled by performing comparison calculations.

(Example) An example of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a main body of a dishwasher, which is equipped with a washing tank 2 inside, and its front opening is closed by a door 3 so as to be openable and closable. Reference numeral 4 denotes a spray body, which is located at the inner bottom of the cleaning tank 2 and is rotatably attached to the cleaning pump 5. The cleaning pump 5 is connected via a connecting pipe to an outlet (not shown) formed at the bottom of the cleaning tank 2, and is operated by being connected to a drive motor 6. Reference numeral 7 denotes a water supply device, which includes a water supply valve (not shown) to which a water supply pipe 8 is connected and which adjusts the amount of water supplied into the washing tank 2. A water amount detection unit 9 is connected to a water source outside the main body 1. is connected to.

The water amount detection unit 9 includes a coil 11 that is connected to an AC power supply 10 and is a magnetic field forming unit that forms an alternating magnetic field perpendicular to the water supply pipe 8, and a coil 11 that is provided in the water supply pipe 8 at a position orthogonal to this magnetic field. It is provided with a pair of electrodes 12, 12. The water amount detection section 9 detects a minute alternating current voltage generated by electromagnetic induction in proportion to the amount of water flowing in the water supply pipe 8 using electrodes 12 and 12 when a vertical magnetic field is formed. Further, the electrodes 12.12 are connected to a central control unit 13, which converts the voltage generated at the electrodes 12.12 into a predetermined electrical signal at predetermined time intervals, and stores the voltage in a memory (not shown). The water supply amount data is accumulated and stored in a predetermined area of the unit, and is compared with predetermined water supply amount data previously stored in a predetermined area. Based on the calculation result, the water supply valve is connected to the water supply device 7 connected via a signal line. It outputs a control signal instructing the open/close state.

In addition, 14 is a tableware basket installed in the washing tank 2, and 15 is an exhaust port provided in the upper part of the main body 1 so as to communicate with the inside of the washing tank 2.

Next, the operation of the above configuration will be explained.

In order to supply water into the cleaning tank 2, water can be supplied by opening the water supply valve of the water supply device 7. At this time, the water amount detection unit 9 is in an operating state, and the coil 11 forms a magnetic field perpendicular to the water supply pipe 8. A voltage proportional to the amount of water flowing in the water supply pipe 8 is generated at the electrode 12.1.
The voltage generated at 2 is converted into an electric signal at predetermined time intervals by the central control unit 13, stored in a predetermined storage unit as water amount data, and compared with predetermined water supply data. In this calculation, for example, if the water amount data accumulated and stored in the storage section is smaller than the water supply data, the central control section 13 issues a control signal to the water supply device 7 so that the water supply valve remains open. Further, when the water amount data becomes larger than the water supply data, the central control unit 13 issues a control signal to the water supply device 7 to close the water supply valve and stop the water supply into the cleaning tank 2.

According to the above embodiment, the coil 11 forms a magnetic field perpendicular to the water supply pipe 8, and the electrode 1 is provided at a position orthogonal to the magnetic field.
2. Since the water amount detection unit 9 equipped with 12 is provided, the cleaning tank 2
The amount of water supplied into the washing tank 2 can be accurately detected by the water supply pipe 8 that supplies water to the cleaning tank 2, and appropriate water can be supplied. Especially in the past,
If the water in the cleaning tank sways and the water level changes drastically or is too low, or if the water pressure in the water supply pipe is not always constant, it is not possible to supply water accurately.
According to the present invention, it is convenient because it is not affected by fluctuations in the water level in the cleaning tank or water pressure in the water supply pipe, and can always accurately detect the amount of water supplied. Moreover, it is economical and sanitary because it never occurs that more water is supplied than necessary, or that the dishwashing becomes insufficient due to insufficient water supply. Moreover, the above-mentioned small size can be easily applied to conventional products by unitizing the water level detection section, and is highly usable.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the scope of the invention.

[Effects of the Invention] As described above, the present invention includes a water amount detection unit that forms a magnetic field perpendicularly to the water supply pipe connected to the water supply device and has an electrode at a position orthogonal to the magnetic field. This has the excellent effect of being able to accurately detect the amount of water being supplied into the interior of the system, and ensuring appropriate water supply at all times.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is an overall diagram with a part cut away, Fig. 2 is a schematic diagram of the water level detection section, and Fig. 3 is an electrical configuration diagram. . In the figure, 1 is the main body, 2 is a cleaning tank, 7 is a water supply device, 8 is a water supply pipe, 9 is a water amount detection section, 11 is a coil (magnetic field forming section), 1
2 is an electrode, and 13 is a central control unit. ] Qi 1 figure

Claims (1)

[Claims] 1. A cleaning tank equipped in the main body, a water supply device that supplies water to the cleaning tank and connects a water supply pipe, and a magnetic field forming part that forms a magnetic field perpendicular to the water supply pipe, and a position perpendicular to this magnetic field. 1. A water supply device for a dishwasher or the like, comprising: a water amount detection section provided with an electrode; and a central control section connected to the water amount detection section to control the water supply amount of the water supply device.