JPH105169A - Dishwasher with built-in water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher with a built-in water heater which has a function of self-supplying hot water to be used and by which waiting time for temperature rise in the hot water is almost eliminated. SOLUTION: A tableware washing machine 1 with built-in water heater has a cleaning tank 3 to house tableware 13 to be cleaned and a means (a nozzle 17) to inject wash water into this tableware 13, and also has a gas fired water heater 25, a hot water storage tank 19 to store warm water and a pipe line to send the warm water of the hot water storage tank 19 to the nozzle 17 in a complete set of casing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes by injecting hot water into the dishes. In particular, the present invention relates to a dishwasher with a built-in water heater, which has a function of self-supplying hot water to be used and can hardly wait for warming up of hot water.

[0002]

2. Description of the Related Art In a conventional general dishwasher, the temperature of hot water sprayed on tableware at the time of washing is about 60 ° C., and the temperature of the hot water at the time of rinsing is about 70 ° C. The reason for the higher temperature during rinsing is to promote drying after rinsing. As the water to be used, supply of water from tap water or hot water from a water heater is stored in a tank in the dishwasher, and the temperature is set to 60 ° C. or 70 ° C. by an electric heater provided with the tank.
Heat to ° C. The hot water in this tank is pressurized by a washing pump and jetted from a nozzle.

[0003]

In a conventional dishwasher, when water with a water temperature of 20 ° C. is supplied, it takes 20 to 3 minutes to raise the temperature with a built-in electric heater (normally about 1.0 kW).
It takes 0 minutes. Even if it is connected to a water heater, the cold water in the piping connecting the water heater and the dishwasher causes the hot water in the pipe to cool down, and the dishwasher is eventually heated by an electric heater. And the effect of time reduction is not improved.

[0004] Even when hot water of 60 ° C is supplied, it is necessary to raise the temperature to 70 ° C during the heating and rinsing, so that a heating time of 5 to 10 minutes is required. When hot water is supplied, the cleaning time (including heating time) is reduced compared to when water is supplied, but since the other terminal (bath, shower, etc.) is connected to the water heater, the set temperature is lower. In some cases, the temperature is around 40 ° C., and the advantage of shortening the time by connecting hot water is not sufficiently exhibited.

[0005] After all, the conventional electric heater type has a limited heating capacity, and it takes a long time to wash dishes. The present invention relates to a dishwasher for washing by spraying hot water onto tableware, which has a function of self-supplying hot water to be used, and has a built-in water heater that can almost eliminate a waiting time for a rise in hot water temperature. It is intended to provide a dishwasher.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a dishwasher with a built-in water heater of the present invention has a washing tank for accommodating dishes to be washed, and sprays washing water onto the dishes in the washing tank. Means, a gas-fired water heater, a hot water storage tank for storing the hot water boiled by the water heater, and a pipeline for sending the hot water in the hot water storage tank to the washing water injection means in a set of casings. Features.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific description will be given with reference to the drawings. FIG. 1 is a view schematically showing a dishwasher with a built-in water heater according to one embodiment of the present invention. (A) is a front sectional view, and (B) is a side sectional view. The dishwasher 1 with a built-in water heater of FIG. 1 has a box-shaped casing 3. A control unit 5 is installed in an upper part in the casing 3. The control unit 5 controls the entire dishwasher with a built-in water heater (such as an automatic washing sequence). An operation panel 7 is provided on the front of the control unit 5. Using the operation panel 7,
The user performs an operation input.

A washing tank 9 is formed in the center of the casing 3. In the washing tank 9, a tableware basket 11 on which tableware 13 is set is placed. A nozzle 17 is provided at the bottom of the cleaning tank 9. A shower 15 is sprayed from the nozzle 17 toward the tableware 13 in the basket 11. Shower 15
The hot water is supplied to the nozzle 17 through a pipe by pressurizing hot water in a hot water storage tank 19 described later by a cleaning pump (not shown).

Below the washing tank 9, a hot water storage tank 19 is provided. A water heater including a gas control board 21, a gas control unit 23, a gas combustion unit 25, and the like is provided below the hot water storage tank 19.

A specific configuration example of the gas combustion section 25 is shown in FIG.
This is shown in (B). That is, a flat gas burner 37 is provided at the lower part of the part 25 so as to spread over substantially the entire part 25. City gas is supplied to the gas burner 37 from a gas source pipe 43 through a gas proportional valve 39 and a gas solenoid valve 41. Gas proportional valve 39
Is a valve for controlling the gas amount so that the hot water temperature becomes the target hot water temperature. The solenoid valve 41 is a valve that shuts off the gas supply to the gas burner 37 when it goes out or when it is burning empty. Although not shown, the gas burner 37
, A temperature sensor for detecting the extinguishing of the gas burner 37, a water flow switch for detecting empty heating, and the like.

On the gas burner 37, a finned water pipe 31 folded in a U-shape is provided so as to cover the gas burner 37. Flame 35 from gas burner 37
The finned water pipe 31 is heated by the combustion gas, and the water flowing in the finned water pipe 31 is heated. Water tube with fins 3
1 is supplied with water from a connected water source pipe 33 through a water supply valve 32. The exit side end of the finned water pipe 31 is connected to the hot water storage tank 19, and the warmed warm water is sent from the finned water pipe 31 to the hot water storage tank 19 and stored therein.

The combustion exhaust gas from the gas burner 37 passes through the exhaust duct 12 rising from the back side of the gas combustion section 25 to the back side of the washing tank 9, and is discharged from the exhaust port 10 opening upward from the upper back side of the casing 3. You. In addition, hot water storage tank 1
9 may be provided with an electric heater for temperature adjustment.

Next, control of the water heater in the dishwasher with a built-in water heater of this embodiment will be described. FIG. 2 is a flowchart showing a control flow of the water heater in the dishwasher with a built-in water heater of the present embodiment. First, when the start switch of the dishwasher is turned ON (101), the finned water pipe 31 is turned on.
The water supply valve 32 for sending water to the valve is opened (102). Next, after confirming the passage of water to the finned water pipe 31, the combustion of the gas burner 37 starts (103). Then, hot water supply to hot water storage tank 19 starts (104).

Next, the level of the hot water storage tank 19 is checked (105).
Return to and continue hot water supply. If it is full (YES),
The combustion of the gas burner is stopped (106), and then the water supply valve 32 is closed (107). Then, the washing of the dishwasher is started (108).

[0015]

As is apparent from the above description, the present invention has the following effects. By incorporating a water heater in the dishwasher main body, it is not necessary to use cold water in the piping from the external water heater as before, and there is no piping loss, and hot water from the built-in water heater can be used directly Therefore, the cleaning time can be reduced. Since the temperature of the hot water can be arbitrarily adjusted in the hot water section, there is no need to use an electric heater.

[Brief description of the drawings]

FIG. 1 is a view schematically showing a dishwasher with a built-in water heater according to one embodiment of the present invention. (A) is a front sectional view, (B)
Is a side sectional view.

FIG. 2 is a flowchart showing a control flow of the water heater in the dishwasher with a built-in water heater of the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Dishwasher 3 Casing 5 Control part 7 Operation panel 9 Cleaning tank 10 Exhaust port 11 Basket 12 Exhaust duct 13 Tableware 15 Shower 17 Nozzle 19 Hot water storage tank 21 Gas control board 23 Gas control part 25 Gas combustion part 31 Water pipe with fin 32 Water supply Valve 33 Water pipe 35 Flame 37 Gas burner 39 Gas proportional valve 41 Gas solenoid valve 43 Gas pipe

Claims (1)

[Claims] 1. A washing tank for storing dishes to be washed, means for injecting washing water into dishes in the washing tank, a gas-fired water heater, and a hot water storage tank for storing hot water boiled by the water heater. A dishwasher with a built-in water heater, comprising a set of casings, and a conduit for sending hot water from a hot water storage tank to the washing water jetting means.