JP2000245678A - Dish washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washing and drying machine which is capable of supplying washing water of adequate temperature in the washing step. SOLUTION: The dish washing and drying machine 1 has a dish busket 5 which houses tableware to be washed, supply piping 23 for supplying the washing water to dishes in the dish busket 5, a hot water storage tank 11 for storing the supplied washing water, an electric heater 13 for heating the washing water in the hot water storage tank 11 and a nozzle 13 for injecting the washing water in the hot water storage tank 11. Water feed piping 25 for supplying the non-heated water from a water pipe and hot water feed piping 27 for supplying the heated water from a gas hot water heater, etc., are connected to the supply piping 23. The heated water is supplied from the hot water feed piping 27 in a regular washing and heated rinsing step. The non-heated water is supplied from the water feed piping 25 in a prewashing and rinsing step.

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 and drying by spraying warm water on dishes. In particular, the present invention relates to a dishwasher that supplies washing water at an appropriate temperature in a washing process.

[0002]

2. Description of the Related Art The washing operation of a dishwasher usually includes the steps of pre-washing, main washing, rinsing 1, rinsing 2, and heating rinsing, and the washing water in the hot water storage tank is replaced at each step. Further, the temperature of the cleaning water supplied for each process is set to an appropriate temperature. In other words, the pre-washing, rinsing 1 and rinsing 2 steps may be performed at a relatively low temperature,
In the main cleaning and heating rinsing steps, high-temperature (about 60 ° C.) cleaning water is required. In particular, in the heating rinsing, high-temperature hot water is required to facilitate drying after rinsing. Conventionally, the water supply system of the supplied cleaning water is one system, and is supplied from a pipe of either a water supply system to which unheated water such as tap water is supplied or a hot water supply system to which heated water is supplied from a water heater or the like. Branched and connected.

[0003]

Therefore, when the washing water is supplied only from the water supply system, pre-washing, rinsing 1,
In the main washing and heating rinsing steps, tap water is supplied with hot water heated to a predetermined temperature by a built-in electric heater in the rinsing 2 step. At this time, it takes time to heat the tap water with the electric heater, and the running cost is further increased.

When heating water is supplied as washing water from a gas heater or the like, the running cost is lower than when tap water is heated by an electric heater. However, warm water is also used in the pre-washing, rinsing 1 and rinsing 2 steps in which originally low-temperature tap water is used, so that the temperature rising energy is wasted.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a dishwasher and dryer capable of supplying washing water at an appropriate temperature in a washing process.

[0006]

According to a first aspect of the present invention, there is provided a dish-washing / drying machine according to the first aspect of the present invention, which supplies cleaning water to tableware for storing tableware to be cleaned and tableware in the tableware basket. A hot water storage tank for storing the supplied cleaning water, a means for heating the cleaning water in the hot water storage tank, and a means for injecting the cleaning water in the hot water storage tank, for supplying unheated water from a water pipe. A system and a hot water supply system for supplying heated water from a gas water heater or the like are connected to the washing water supply means. In this aspect, it is possible to supply heated water from the hot water supply system in the main washing and heating rinsing steps, and to supply non-heated water from the water supply system in the pre-washing and rinsing steps.

[0007] Since the specification is such that hot water and water are arbitrarily selected and supplied for each process, the running cost can be reduced by switching the supply of hot water and water for each process.
That is, in the main cleaning and heating rinsing steps, by supplying the heating water from the hot water supply system, the cost required for raising the temperature is lower than in the case of supplying tap water. In addition, by supplying tap water during the pre-washing and rinsing steps, it is possible to reduce the utility cost required for heating the water.

In addition, the hot water supply system and the water supply system are each provided with a water supply valve, and the water supply valves can be linked to adjust the supply amount of the washing water from each system. Alternatively, the temperature of the supplied washing water can be controlled by changing the mixing ratio of water and heating water.

Further, the hot water supply system and the water supply system may include:
A three-way valve may be provided between the above-mentioned cleaning water supply means, and the three-way valve may be switched to adjust the supply amount of the cleaning water from each system. In this case, the configuration is simple, and the cost of the apparatus can be reduced.

Further, the dish washer-dryer of the present invention is provided with a controller for setting the time of the washing process and selecting each process.
Cleaning and drying can be performed according to the set process. The time of each step can be set finely according to the number of dishes to be washed and the degree of contamination, thereby preventing excessive energy consumption and shortening the washing time.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view schematically showing a dishwasher / dryer according to one embodiment of the present invention. The dishwasher 1 has a box-shaped casing 3. A tableware basket 5 is provided in the casing 3 and stores tableware to be washed. The control unit 7 has a function of arbitrarily selecting a stroke and setting a time required for each stroke, in addition to a normal dishwashing and drying operation. The dishes are washed and dried according to the stroke and time set by the control unit 7.

A water inlet 9 is provided above the tableware basket 5 in the casing 3, and washing water is sprayed on the tableware in the tableware basket 5. The cleaning water supply pipe 23 will be described later.
A hot water storage tank 11 is provided below the tableware basket 5, and stores the injected cleaning water. This hot water storage tank 1
An electric heater 13 and a temperature sensor 15 are provided in 1. The electric heater 13 heats the cleaning water when the cleaning water in the hot water storage tank 11 has not reached a predetermined temperature. The washing water in the hot water storage tank 11 is pumped up by the washing pump 17 and is jetted through the nozzle 19 to the dishes in the tableware basket 5 to wash the dishes. After the elapse of a predetermined washing time, the injection stops, and the washing water stored in the hot water storage tank 11 is pumped up by the drainage pump 21 and drained. The temperature detected by the temperature sensor 15 is sent to the control unit 7, and the electric heater 13, the cleaning pump 17, and the drain pump 21 are controlled by the control unit 7.

A pipe 23 for supplying the cleaning water is connected to a water supply pipe 25 such as tap water and a hot water supply pipe 27 via a gas water heater or the like. The water supply pipe 25 and the hot water supply pipe 27 are provided with a water supply valve A29 and a water supply valve B31, respectively. The opening and closing of these water supply valves is operated by the control unit 7.

FIG. 2 is a flowchart showing the steps of the dishwasher / dryer of FIG. Dishwashing and drying are pre-washed in order according to the time of each process input to the control unit,
The main washing, rinsing 1, rinsing 2, and heating rinsing are performed.
In the pre-washing, rinsing 1 and rinsing 2 steps, hot water is not particularly required, and low-temperature washing water such as tap water is supplied. In the main cleaning and the heating and rinsing, high-temperature cleaning water having a high cleaning function and a high drying function is supplied.

FIG. 3 shows the pre-washing of the dishwasher of FIG.
It is a flowchart which shows the process of rinsing 1 and rinsing 2. In the pre-washing, rinsing 1 and rinsing 2 steps,
At 10, the water supply valve A29 provided in the low-temperature water supply pipe 25 is opened, and tap water is poured from the water inlet 9 and stored in the hot water storage tank 11 in the casing 3. Next, S11
When the hot water storage tank 11 becomes full, the water supply valve A29 is closed in S12. Next, in S13, the cleaning pump 17 is operated, the cleaning water stored in the hot water storage tank 11 is pumped, and the cleaning water is sprayed from the nozzle 19 toward the tableware in the tableware basket 5. In S14, the injection is continued until the preset time is reached, and when the predetermined time is reached, the cleaning pump 17 is stopped in S15. Next, at S16, the drainage pump 21
Operates, and the water in the hot water storage tank 11 is drained.

FIG. 4 is a flowchart showing the main washing and heating rinsing steps of the dishwasher / dryer of FIG. In the main washing and heating rinsing steps, first, in S20, the water supply valve B31 provided in the high-temperature hot water supply pipe 27 is opened,
Heated water is poured from the water inlet 9 and stored in the hot water storage tank 11 in the casing 5. Next, in S21, the hot water storage tank 11
Is full, the water supply valve B31 is closed in S22. Next, in S23, the temperature of the washing water stored by the temperature sensor 15 in the hot water storage tank 11 is measured, and if the temperature is set by the user or set in advance, the washing pump 17 is operated in S24.

In S23, if the temperature of the washing water in the hot water storage tank 11 has not reached the predetermined temperature, the process proceeds to S25, in which the electric heater 13 is operated. Next, in S26, the temperature in hot water storage tank 11 is measured again. If the temperature has reached the predetermined temperature, the process proceeds to S27 and the electric heater 13 is stopped.
If the temperature has not reached the predetermined temperature, the electric heater 13 is continuously operated. Thereafter, the process proceeds to S24, where the cleaning pump 17 is operated. The cleaning pump 17 pumps up the cleaning water stored in the hot water storage tank 11 and injects it from the nozzle toward the tableware in the tableware basket. Injection is continued until the preset time is reached in S28, and when the predetermined time is reached, S2 is reached.
At 9, the cleaning pump 17 stops. Next, in S30, the drain pump 21 is operated to drain the water in the hot water storage tank.

If it is desired to use hot water even in the pre-washing and rinsing steps according to the degree of soiling of the dishes, the control unit 7 controls the opening and closing of the water supply valve A29 and the water supply valve B31 of the water supply pipe and the hot water supply pipe to obtain an appropriate temperature. Can also be supplied as

Further, the water supply pipe 25 and the hot water supply pipe 27 are not provided with the water supply valve A29 and the water supply valve B31, respectively.
A three-way valve may be provided at the connection between the water supply pipe 3 and the water supply pipe 25 and the hot water supply pipe 27. The opening and closing of the three-way valve on the water supply pipe 25 side and the hot water supply pipe 27 side is controlled by the control unit 7.

[0020]

As is clear from the above description, according to the present invention, hot water and water are arbitrarily selected and supplied for each step of the dishwasher, so that hot water
By switching the water supply, the running cost can be reduced. In other words, when heating water is supplied from the hot water supply system in the main cleaning and heating rinsing steps, the cost required for raising the temperature is lower than when tap water is supplied. In addition, if tap water is supplied during the pre-washing and rinsing steps, the utility costs required for a water heater or the like provided in the hot water supply system become unnecessary.

[Brief description of the drawings]

FIG. 1 is a view schematically showing a dishwasher / dryer according to one embodiment of the present invention.

FIG. 2 is a flowchart showing a process of the dishwasher / dryer of FIG. 1;

FIG. 3 is a flowchart showing the steps of prewashing, rinsing 1, and rinsing 2 of the dishwasher of FIG. 1;

FIG. 4 is a flowchart showing the main cleaning and heating rinsing steps of the dishwasher / dryer of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dishwasher / dryer 3 Casing 5 Tableware basket 7 Control part 9 Water inlet 11 Hot water storage tank 13 Electric heater 15 Temperature sensor 17 Washing pump 19 Nozzle 21 Drainage pump 23 Supply pipe 25 Water supply pipe 27 Water supply pipe 29 Water supply valve A 31 Water supply valve B

Claims (5)

[Claims] 1. A tableware for storing tableware to be washed, means for supplying cleaning water to the tableware in the tableware basket, a hot water storage tank for storing the supplied cleaning water, and heating of the cleaning water in the hot water storage tank. Means and a means for injecting washing water in the hot water storage tank, wherein a water supply system for supplying non-heating water from a water pipe and a hot water supply system for supplying heating water from a gas water heater or the like are connected to the washing water supply means. Dishwasher / dryer characterized by being made. 2. A dishwasher having a pre-washing, main-washing, rinsing, and heating rinsing steps, wherein heating water is supplied from a hot water supply system in a main-washing and heating rinsing steps, and water is supplied in a pre-washing and rinsing step. Dishwasher / dryer characterized by supplying unheated water from a system. 3. The tableware according to claim 1, wherein a water supply valve is provided in each of the hot water supply system and the water supply system, and the supply amount of the wash water from each system is adjusted by interlocking each water supply valve. Wash dryer. 4. A three-way valve is provided between the hot water supply system and the water supply system and the washing water supply means, and the three-way valve is switched to adjust a supply amount of washing water from each system. Item 3. A dishwasher / dryer according to item 1 or 2. 5. A control unit for setting a time of a cleaning process and selecting each process, wherein cleaning and cleaning are performed in accordance with the set processes.
The dishwasher / dryer according to any one of claims 1 to 4, wherein drying is performed.