JPH11104057A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent high water pressure from being applied to a water feed valve so as to use an inexpensive water feed valve by disposing a pressure relief valve in a water feed line to the water feed valve for controlling the feed of water to a washing vessel for storing and washing tableware, and returning water discharged from a water drip part of the pressure relief valve to the washing vessel. SOLUTION: When tableware 3 is arranged in a dish basket 4 and the operation is started, a heater 5, a washing pump 6, a water feed valve 8, a drain pump and the like are operated by a control device 11 to sequentially execute the respective processes of washing, rinsing and drying the tableware 3. The water feed valve 8 is always subjected to water pressure of city water at this time becaused the washing, rinsing and drying processes proceed automatically, and when connected to the water line under high water pressure, a valve element of a pressure relief valve incorporated in a branch part 13 is opened against a spring in a water feed line to the water feed valve, so that city water is discharged through a hose 14 to a washing vessel 2. Thus, city water at the time of pressure relief is discharged to the washing vessel 2 so as to use an inexpensive water feed valve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for storing dishes in a washing tank and washing, rinsing and drying the dishes.

[0002]

2. Description of the Related Art Conventionally, this type of dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, a dishwasher main body 1 has a washing tank 2 provided therein, and a dish basket 4 for accommodating a tableware 3 in the washing tank 2. In cleaning tank 2, cleaning tank 2
A heater 5 for heating the cleaning water in the inside is provided, a cleaning pump 6 is provided on the lower surface of the cleaning tank 2, and the cleaning water is injected from the cleaning nozzle 7 to wash the tableware 3 stored in the tableware basket 4. I have. The water supply valve 8 supplies tap water to the washing tank 2. The water supply side of the water supply valve 8 is connected to a faucet (not shown) of the house by a water supply hose 9. The washing water in the washing tank 2 is drained by a drain pump (not shown).

A temperature sensor 10 is formed of a thermistor, and is attached to the lower surface of the washing tank 2 and is inputted to a control device 11 to detect the temperature of the washing water in the washing tank 2 and control the temperature of the washing water by the control device 11. In addition, the temperature is controlled during the drying process. A lid 12 is provided on the front surface of the cleaning tank 2 so as to be freely opened and closed.

The operation of the above configuration will be described. When the user opens the lid 12, places the tableware 3 in the tableware basket 4, stores the tableware in the washing tank 2 and puts in the detergent, and starts operation,
The operation of the heater 5, the cleaning pump 6, the water supply valve 8, the drainage pump, and the like is controlled by the control device 11, and the tableware 3 stored in the tableware basket 4 is washed, rinsed, and dried.

[0006]

In such a conventional configuration, the control device 11 automatically advances the washing, rinsing, and drying processes. During the rinsing process, the water supply valve 8 is opened and closed each time water is supplied to the washing tank 2. Due to the installation conditions of the dishwasher, when installed at high temperature and high tap water pressure,
For example, when connected to a pressurized boiler, the water supply valve 8 is repeatedly subjected to high-temperature, high-pressure water pressure.

[0007] The conventional water supply valve 8 has a problem in that it has a complicated shape, uses an expensive material, and increases the cost in order to withstand the high temperature and the high water pressure.

In recent years, kitchen faucets are of a one-touch lever type, which can open and close the faucet. The one-touch lever type for switching water supply from open to closed, and when the faucet is operated, a water hammer phenomenon occurs. The inside of the temporary water supply path is in a high water pressure state. One-touch lever type dishwasher,
When connected to a water supply path that can open and close the faucet, when operating the faucet with a one-touch lever type from the open to closed water supply,
High water pressure is also temporarily applied to the water supply valve 8. In order to withstand this high water pressure, the water supply valve 8 has a complicated shape, uses an expensive material, and raises the cost.

The present invention has been made to solve the above-mentioned problems. Even if high temperature and high pressure are repeatedly applied to a dishwasher, high temperature and high pressure are not applied to a water supply valve, thereby improving safety at low cost. It is intended to be.

[0010]

In order to achieve the above object, the present invention controls the water supply to a washing tank for storing and washing tableware by a water supply valve, and connects a water supply valve and a faucet of a house with a water supply hose. And the operation of the water supply valve is controlled by the control means. A pressure relief valve is provided in a water supply path to a water supply valve, and water discharged from a drain portion of the pressure relief valve is returned to the cleaning tank.

Thus, even when high-temperature and high-pressure water pressure is repeatedly applied, high water pressure is not applied to the water supply valve, the water supply valve can be made of a low-cost general material, and the drainage portion of the pressure relief valve can be formed. Even if the discharge water is generated from the cleaning tank, it is possible to prevent the water from leaking out of the apparatus by returning the discharge water into the cleaning tank.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The first aspect of the present invention relates to a cleaning tank for storing and washing dishes, a water supply valve for controlling water supply to the cleaning tank, and an operation of the water supply valve. Control means for controlling, and a water supply hose for connecting the water supply valve and a faucet of a house, a pressure relief valve is provided in a water supply path to the water supply valve, and discharge from a drain portion of the pressure relief valve is provided. The structure is such that water is returned to the washing tank, and even if high-temperature, high-pressure water pressure is repeatedly applied to the dishwasher, water is discharged from the drain portion of the pressure relief valve, and high water pressure is applied to the water supply valve. The water supply valve can be made of a low-cost general material, and even if discharge water is generated from the drainage part of the pressure relief valve, the discharge water is returned to the cleaning tank so that the water is discharged outside the machine. Leakage can also be prevented.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a water level detecting device for detecting a water supply level in the cleaning tank, wherein the water discharged from a drain portion of a pressure relief valve is used. The water level rise in the washing tank is configured to be detected by the water level detection device, and when high water pressure is applied to the dishwasher, the pressure is released by the pressure relief valve,
By detecting the discharge water, it is possible to detect that an abnormality has occurred in the water supply path, and it is possible to take a countermeasure.

According to a third aspect of the present invention, in the second aspect of the present invention, the water level detecting device detects a rise in the water level in the cleaning tank due to the water discharged from the drainage portion of the pressure relief valve, and the control means. In this way, at least one of the display and the sound is used to notify the abnormality of the water supply path.The user is notified of the abnormality of the water supply path, and measures for the water supply path such as closing the faucet or reducing the pressure of the water supply are performed. It is possible to take.

According to a fourth aspect of the present invention, there is provided a washing tank for storing and washing dishes, a water supply valve for controlling water supply to the washing tank, a control means for controlling the operation of the water supply valve, and the like. A water supply hose for connecting a water supply valve to a faucet of a house, a water receiving portion provided at a lower portion of the dishwasher main body, and a water leakage detecting device for detecting water leakage to the water receiving portion. A pressure relief valve is provided in the water supply path of the above, the discharge water from the drain portion of the pressure relief valve is received by the water receiving portion, and a rise in the water level in the water receiving portion due to the discharged water is detected by the water leakage detecting device. The discharge water from the pressure relief valve can be reliably detected. That is, for example, when high water pressure is applied to the water supply valve during the cleaning process, the water level in the cleaning tank and the water level detecting device is waving due to the operation of the cleaning pump, and accurate detection by the water level detecting device cannot be performed. There is. The water receiver provided in the lower part of the dishwasher main body can reliably detect water leakage in the entire process of the dishwasher, and can promptly confirm an abnormality in the water supply path.

According to a fifth aspect of the present invention, in accordance with the fourth aspect of the present invention, a rise in the water level in the water receiving portion due to the water discharged from the drain portion of the pressure relief valve is detected by the water leakage detecting device, and the control means In this way, at least one of the display and the sound is used to provide an abnormality notification.The abnormality of the water supply path is confirmed at an early stage, the user is notified of the abnormality of the water supply path at an early stage, and the faucet is closed or the water supply is stopped. It is possible to take measures for the water supply path such as reducing the pressure.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

(Embodiment 1) As shown in FIG. 1, an indoor faucet (not shown) and a water supply valve 8 of a dishwasher are connected to a water supply hose 9.
And a T-shaped branch portion 13 is provided in a water supply hose 9 which is a water supply path to the water supply valve 8. One end of the branch portion 13 is connected to a hose 14, and the other end of the hose 14 is connected to the cleaning tank 2.
Is in communication with

As shown in FIG. 2, the T-shaped branch portion 13 is connected to the water supply hose 9 at both ends of the branch portion 13 and both ends are sealed with a packing 15. Branch 1
3 has one end connected to the hose 14, and the branch 13 and the hose 1
4, a pressure relief valve 16 is arranged. The pressure relief valve 16 includes a relief valve body 16a and a relief valve body 1.
An O-ring that seals between the branch 6a and the branch portion 13 is provided, and a drain hole (a drain portion) 16b that connects the branch portion 13 and the hose 14 is provided.

A packing 17 for closing the drain hole 16b is provided in the drain hole 16b. The packing 17 is a spring 18 and is normally pressed against the relief valve body 16a so as to close the drain hole 16b. Spring 18
Is housed in the relief valve body 16a by a holding screw 19.

The operation will be described in the above configuration. When the user opens the lid 12, arranges the tableware 3 in the tableware basket 4, stores it in the washing tank 2 and puts in the detergent, and starts operation,
The control device (control means) 11 controls the operations of the heater 5, the cleaning pump 6, the water supply valve 8, the drainage pump, and the like, and cleans, rinses, and dries the tableware 3 arranged in the tableware basket 4.

The tap water pressure is constantly applied to the water supply valve 8 in order to automatically advance the washing, rinsing and drying processes. When the dishwasher is installed and connected to a tap under high water pressure, the spring 18 of the pressure relief valve 16 is pushed by the tap water pressure, the packing 17 is separated from the relief valve body 16a, and the tap water is released from the pressure. Drain hole 16b of valve 16, hose 14
And is discharged to the cleaning tank 2.

Therefore, an abnormal tap water pressure set in advance is not applied to the water supply valve 8. Further, the tap water from the drain hole 16b of the pressure relief valve 16 is discharged into the cleaning tank 2, so that water leakage to the outside of the apparatus or the like can be prevented.

(Embodiment 2) As shown in FIG.
The other end of the hose 20 communicating with the washing tank 3 is connected to an auxiliary tank 21 for detecting the water level of the washing tank 2. A cleaning water level detection switch 22 for detecting a cleaning water level and an overflow water level detection switch (water level detection device) 23 are provided in the auxiliary tank 21.
And the washing tank 2 communicate with each other.

The lid 12 is provided with a control device 11, and on the surface of the control device 11, as shown in FIG. 4, a course setting switch 24a for setting courses such as careful, standard, pre-wash only, and dry only. , A start / pause switch 24b for starting and temporarily stopping the operation, and display units 25a to 25d for careful, standard, pre-wash only, and dry only.

Normally, for example, when the standard course is selected, the standard display section 25b is turned on, and when the operation is started, the standard display section 25b is turned on and off. When the water level is detected by the water level detection switch 23, all the display sections 25a to 25d are blinked to notify the user of the abnormality of the water supply path. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. When the dishwasher is installed and connected to a tap under high water pressure, the spring 18 of the pressure relief valve 16 is connected to the tap water pressure as in the first embodiment. Then, the packing 17 is separated from the relief valve body 16a, and the tap water is discharged to the auxiliary tank 21 through the drain hole 16b of the pressure relief valve 16 and the hose 20.

Therefore, an abnormal tap water pressure set in advance is not applied to the water supply valve 8. Further, the auxiliary tank 21 and the cleaning tank 2 are in communication with each other, and the cleaning water level in the cleaning tank 2 and the cleaning water level in the auxiliary tank 21 rise above the normal cleaning water level, and the overflow water level detection switch 23 is operated to cause an abnormality. Can be detected, and based on the abnormality detection by the overflow water level detection switch 23, all the display units 25a to 25d blink,
It is possible to take measures for the water supply path, such as notifying the user of the abnormality of the water supply path and closing the faucet or reducing the supply pressure.

(Embodiment 3) As shown in FIG. 5, a water receiver 26 is provided at the lower part of the dishwasher main body 1, and the water receiver 26 detects a water level when water leaks from the washing tank 2 or the like. A water leak detection switch 27 is provided. The other end of the hose 28 communicating with the branch portion 13 is connected to the water receiving portion 26 so that the water discharged from the drain hole 16b of the pressure relief valve 16 is received by the water receiving portion 26. When the rise of the water level in the inside is detected by the leak detection switch 27,
a to 25d are blinked to notify the user of an abnormality in the water supply path. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. When the dishwasher is installed and connected to a tap under a high water pressure, the spring 18 of the pressure relief valve 16 is connected to the tap water pressure as in the first embodiment. , The packing 17 is separated from the relief valve body 16a, and the tap water is discharged to the water receiving portion 26 through the drain hole 16b of the pressure relief valve 16 and the hose 28.

Therefore, an abnormal tap water pressure set in advance is not applied to the water supply valve 8. In addition, the rise of the water level in the water receiving section 26 due to the discharged water is detected by the water leakage detection switch 2.
7, and based on the abnormality detection by the water leakage detection switch 27, all the display portions 25a to 25d blink, informing the user of the abnormality of the water supply path, closing the water faucet, It is possible to take measures for the water supply path such as reducing the pressure.

The water receiving portion 26 is a portion where water must not accumulate, and during the entire process of washing, rinsing and drying, the water supply valve 8 is provided.
When water is discharged from the drain hole 16b of the pressure relief valve 16 when a high pressure is applied to the pressure relief valve 16, it is possible to reliably and early detect the water.

[0033]

As described above, according to the first aspect of the present invention, a washing tank for storing and washing dishes, a water supply valve for controlling water supply to the washing tank, and the water supply valve. Control means for controlling the operation of the water supply valve, and a water supply hose connecting the water supply valve to the faucet of the house. A pressure relief valve is provided in a water supply path to the water supply valve, and the pressure relief valve is drained. Since the water discharged from the section is returned to the washing tank, even if high-temperature, high-pressure water pressure is repeatedly applied to the dishwasher, water is discharged from the drain portion of the pressure relief valve, and the high water pressure is applied to the water supply valve. Without adding water, the water supply valve can be made of a low-cost general material, and even if discharge water is generated from the drain portion of the pressure relief valve, the discharge water is returned into the cleaning tank. Also, it is possible to prevent water leakage outside the machine.

According to the second aspect of the present invention, there is provided a water level detecting device for detecting a water supply level in the cleaning tank, and a water level rise in the cleaning tank due to water discharged from a drain portion of the pressure relief valve. Is detected by the water level detection device, when high water pressure is applied to the dishwasher, the pressure is released by the pressure relief valve, and the discharge water is detected, thereby causing an abnormality in the water supply path. Can be detected and countermeasures can be taken.

According to the third aspect of the present invention, the water level detecting device detects a rise in the water level in the washing tank due to the water discharged from the drainage portion of the pressure relief valve, and the display means and the sound are displayed by the control means. At least one of them is configured to perform the abnormality notification, so that it is possible to notify the user of the abnormality of the water supply path, take measures such as closing the water faucet or reducing the pressure of the water supply path.

According to the fourth aspect of the present invention, a washing tank for storing and washing dishes, a water supply valve for controlling water supply to the washing tank, and a control for controlling the operation of the water supply valve and the like. Means, a water supply hose that connects the water supply valve and a faucet of a house, a water receiver provided at a lower portion of the dishwasher main body, and a water leakage detector that detects water leakage to the water receiver. A pressure relief valve is provided in a water supply path to the water supply valve, and the discharge water from a drain portion of the pressure relief valve is received by the water receiving portion, and a rise in water level in the water receiving portion due to the discharged water is caused by the water leakage. Since the detection device is configured to detect the water, the water discharged from the pressure relief valve can be reliably detected, and the abnormality of the water supply path can be confirmed at an early stage.

According to the fifth aspect of the present invention, an increase in the water level in the water receiving portion due to the water discharged from the drain portion of the pressure relief valve is detected by the water leakage detecting device, and the display and sound of the sound are detected by the control means. At least on the other hand, because the system is configured to perform anomaly notification, the water supply path is checked early, the user is notified of the water supply path abnormality at an early stage, the faucet is closed, the water supply pressure is reduced, etc. It is possible to take measures for the route.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dishwasher according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of the dishwasher.

FIG. 3 is a longitudinal sectional view of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is a front view of an operation display unit of the dishwasher.

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

FIG. 6 is a longitudinal sectional view of a conventional dishwasher.

[Explanation of symbols]

 2 Washing tank 3 Tableware 8 Water supply valve 9 Water supply hose 11 Control device (control means) 16 Pressure relief valve 16b Drain hole (drain portion)

Claims (5)

[Claims] 1. A washing tank for storing and washing tableware, a water supply valve for controlling water supply to the washing tank, control means for controlling the operation of the water supply valve, and the like, and a water faucet for the water supply valve and house. And a water supply hose for connecting the pressure relief valve to the water supply valve, a pressure relief valve provided in a water supply path to the water supply valve, and water discharged from a drain portion of the pressure relief valve being returned to the washing tank. 2. A water level detecting device for detecting a water supply water level in a washing tank, wherein a rise in the water level in the washing tank due to water discharged from a drain portion of a pressure relief valve is detected by the water level detecting device. The dishwasher according to claim 1. 3. A configuration in which a rise in the water level in the washing tank due to water discharged from a drain portion of the pressure relief valve is detected by a water level detection device, and at least one of a display and a sound is notified by a control means to notify an abnormality. The dishwasher according to claim 2. 4. A washing tank for storing and washing tableware, a water supply valve for controlling water supply to the washing tank, control means for controlling the operation of the water supply valve, and the like, and a water faucet for the water supply valve and house. A water supply hose, a water receiver provided at the lower portion of the dishwasher main body, and a water leakage detection device for detecting water leakage to the water receiver, and pressure relief is provided in a water supply path to the water supply valve. A dishwasher provided with a valve, configured to receive discharge water from a drain portion of the pressure relief valve by the water receiving portion, and configured to detect a rise in water level in the water receiving portion due to the discharged water by the water leakage detection device. . 5. A structure in which a rise in the water level in a water receiving portion due to water discharged from a drain portion of a pressure relief valve is detected by a water leakage detecting device, and at least one of a display and a sound is notified by a control means of abnormality. The dishwasher according to claim 4.