JP2001054497A - Tableware washing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tableware washing system, which can be installed by a minimum appurtenant work, does not require a large space, is safe, can instantly use a large amount of hot water as rinsing water, and can suppress costs such as electric charges as the maintenance cost to its minimum as well. SOLUTION: The tableware washing system is equipped with a hot water generating station 10 and a washing station 20. In this case, the hot water generating station 10 is equipped with a high temperature heat storage tank 11, and a steam-water mixer 18. Then, the high temperature heat storage tank 11 is equipped with a heat storage material 12, an electric heater 13 to heat the heat storage material 12, and a heating tube 15, which is arranged through the heat storage material 12, and converts water fed through the inside into steam when receiving the heat stored in the heat storage material 12. The steam-water mixer 18 generates hot water by mixing steam with water when receiving the steam from the heating tube 15. Also, the washing station 20 is equipped with a hot water jetting means 28 to jet hot water from the steam- water mixer 18 to tableware 1 and 2 being arranged in the washing station 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a plate, a cup, a bowl,
The present invention relates to a tableware cleaning system for cleaning tableware such as chopsticks, knives, spoons, and hawks.

[0002]

2. Description of the Related Art In kitchens such as various restaurants, employee cafeterias, and school lunches, dirty dishes, cups, bowls,
It is common to use a dishwasher to wash dishes, such as chopsticks, knives, spoons, and hawks. These dishwashers usually incorporate a hot water generator for generating hot water used as rinsing water or the like. As a heating source of a hot water generator incorporated in this type of dishwasher, an electric heater is generally used from the viewpoint of safety without using an open flame.

[0003]

Since a large amount of tableware must be quickly washed, a large amount of hot water is required at a time as rinsing water, and a large-capacity electric heater is required as a heat source. I was When a large-capacity electric heater is used, it is necessary to supply a large-capacity electric power, and it may be necessary to change the design of existing electric equipment and the like.

[0004] Therefore, the electric heater to be used is of a small capacity so that existing electric equipment can be used, and as a preheating equipment for preheating water to be heated by the electric heater,
In some cases, a water heater using oil or gas was separately provided.

In the case of using a large-capacity electric heater,
In addition to the cost of changing the design of existing electrical equipment, the cost of electricity as a daily maintenance cost was also extremely high.

In the case where an oil water heater or a gas water heater is separately provided from the electric heater, an installation space for the oil heater or the gas water heater is required. The use of fire was a concern for safety.

Conventionally, a dishwashing system to be installed and used in a kitchen or the like has been required to satisfy the following conditions. (1) Generally, the kitchen is a limited space,
It must be as compact as possible and do not require a large installation space. (2) Being sanitary and safe for use in the kitchen. (3) A large amount of hot water can be used instantaneously so that the cleaning process can be performed in a short time. (4) In a restaurant or the like, the service provided to the customer is various dishes, but the price includes the washing cost of tableware, so that the offered price is reduced without lowering the quality of the dishes themselves. Therefore, it is necessary to reduce the cleaning cost as much as possible, and therefore, the initial cost and the running cost for the cleaning must be reduced as much as possible.

[0008] From the above, it can be installed in a limited space such as a kitchen with a minimum amount of incidental work, takes up little space, and can safely and instantaneously use a large amount of warm water as rinsing water. There has been a strong demand for a dishwashing system that can minimize costs such as electricity costs as maintenance costs.

It is an object of the present invention to provide a dishwashing system which can meet such a demand.

[0010]

DISCLOSURE OF THE INVENTION A dishwashing system according to the present invention uses a hot water generating station for generating hot water as washing water, a tableware to be washed, and uses hot water from the hot water generating station. A washing station for washing the dishes, the hot water generating station includes a high-temperature heat storage tank and a steam / water mixer, and the high-temperature heat storage tank includes a heat storage material and the heat storage material. An electric heater for heating the material, a heat transfer pipe for receiving heat stored in the heat storage material and being piped through the heat storage material, and converting water supplied through the inside into steam, The steam / water mixer receives the steam from the heat transfer tube and mixes it with water to generate hot water, and the washing station performs the steam processing on the tableware disposed therein. Characterized in that it comprises a hot water injection means for injecting hot water from the water mixer.

According to one embodiment of the present invention, the water supplied to the heat transfer tube and the steam / water mixer is tap water.

According to another embodiment of the present invention, the heat storage material is a mixture of a solid and a liquid.

According to one embodiment of the present invention, the solid is magnesia and the liquid is a nitrate.

According to another embodiment of the present invention, the electric heater is adapted to be selectively energized by nighttime power.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in more detail with reference to the accompanying drawings according to embodiments and examples of the present invention.

FIG. 1 schematically shows the configuration of a dishwashing system according to one embodiment of the present invention. As shown in FIG. 1, the dishwashing system includes a hot water generation station 10 for generating hot water as wash water.
And hot water generation station 1
A washing station 20 for washing dishes using hot water from zero. Hot water generation station 10
Has a high-temperature heat storage tank 11 and a steam / water mixer 18. In the high-temperature heat storage tank 11, an internal casing is provided via an insulating material in an external casing, and a heat storage material 12 is stored in the internal casing.

As the heat storage material 12, a mixture of a solid and a liquid is preferable because a large amount of heat can be obtained and heat transfer can be promoted. The solid heat storage material is magnesia, and the liquid heat storage material is magnesia. Nitrate (NaNO ₂ / NaNO ₃ / KN
O ₃ ) is preferred. As for magnesia, it is preferable to use a clinker-like material obtained by crushing a rough stone in terms of cost.

An electric heater 13 for heating the heat storage material 12 is provided in the high-temperature heat storage tank 11. The electric heater 13 is provided, for example, so as to extend all over the heat storage material 12. It may be a sheath heater or the like. Further, a heat transfer tube 15 is provided in the high-temperature heat storage tank 11 so as to allow the heat storage material 12 to pass therethrough. The lower end of the heat transfer pipe 15 is connected to a water supply pipe 14 for supplying tap water, and the upper end of the heat transfer pipe 15 is connected to the steam / water mixer 1.
8 is opened in the upper space.

Further, the hot water generation station 10 includes:
A conduit 16 for supplying water to the steam / water mixer 18 is provided. One end of the conduit 16 is connected to the water supply pipe 14, and the other end is opened to a space above the steam / water mixer 18. Have been. A water flow control valve 17 is provided in the middle of the conduit 16. A hot water supply pipe 19 is connected to a lower portion of the steam / water mixer 18 so that hot water can be supplied to the washing station 20 as described later.

On the other hand, the washing station 20 is
1, a placing plate 22 for placing tableware such as a dish 1 and a bowl 2 to be washed is provided below the washing chamber 21. The washing chamber 21 is further provided with a filter plate 23 for filtering remaining residue and the like below the placing plate 22, and a drain pipe 24 for draining waste liquid is connected to the lowest part. Above the mounting plate 22, a holding frame 25 for holding tableware to be washed in an appropriate posture is arranged. In addition, an ejection nozzle 28 for ejecting washing water or rinsing water to the dishes 1 and 2 held on the mounting plate 22 is disposed above the washing chamber 21. And the injection nozzle 28
The steam / water mixer 18 of the hot water generation station 10
The hot water is supplied from a hot water supply pipe 19 connected to a water supply pump 26 through a conduit 27 by a water supply pump 26.

Next, the overall operation of the dishwashing system having such an overall configuration will be described.

The hot water generation station 10 as described above
And a dishwashing machine in which the washing station 20 is integrated as a dishwashing system, is installed at an appropriate place in the kitchen, and a power supply connection terminal 13A of the electric heater 13 is connected to an appropriate power supply circuit and wired. To an appropriate tap water supply circuit. In this case, the power supply circuit may be selectively turned on and off so as to supply only nighttime power. In addition, the tap water supply circuit may be, for example, one that is connected to a normal tap and can be turned on and off by operating a tap of the tap.

In use, an operator turns on a normal power supply connected to a power supply circuit. Then, when entering a nighttime power zone where the electricity rate becomes low, the high-temperature heat storage tank 1 of the hot water generation station 10 is automatically turned on by the power supply circuit.
The first electric heater 13 starts to be energized. Thus, when the electric heater 13 is energized, the heat storage material 12 is heated, and heat is stored at night. When heat is stored to the full capacity of the heat storage material 12 during the night power hours, the power supply circuit automatically stops the energization of the electric heater 13, and the heat stored in the heat storage material 12 is released by natural heat dissipation. When it decreases, an automatic control circuit that re-energizes the electric heater may be provided.

For example, in the early morning of the next day, at the start of business before opening the store, if it is desired to wash dishes that have become dirty from use on the previous day, the dishes 1 and the bowls 2 to be washed, etc. Is stored in the cleaning chamber 21 of the cleaning station 20 to start cleaning. Then, at the timing of injecting the rinsing water as a finish of the cleaning, the worker operates the tap of the tap of the tap connected to the tap water supply circuit, and the tap water passes through the water supply pipe 14 and the heat transfer pipe 15 and the pipe 16 Is supplied with tap water.

The tap water passed through the heat transfer tube 15 is a heat storage material 1
In response to the heat stored in 2, it is heated and converted into steam, which is released into the upper space of the steam / water mixer 18. On the other hand, conduit 1
The tap water passed through 6 is discharged in the upper space of the steam / water mixer 18 and near the opening of the heat transfer tube 15 at a flow rate controlled by the water amount control valve 17. The discharge of the tap water from the opening of the conduit 16 forces the suction and discharge of the steam through the heat transfer tube 15 into the steam / water mixer 18. Thus, the steam and the tap water discharged into the upper space of the steam / water mixer 18 are mixed in the lower space of the steam / water mixer 18 to generate hot water.
It is inevitable that the temperature of the generated hot water also decreases as the temperature of the heat storage material decreases. However, in order to suppress such a decrease in the temperature of the generated hot water as much as possible, the vicinity of the inlet of the heat transfer tube 15 is required. The heat transfer tubes 15 are arranged such that heat can be sequentially extracted from the heat storage material 12 to the heat storage material 12 near the outlet.

The water pump 26 is operated so that the timing of the generation of the hot water in the steam / water mixer 18 is synchronized with the timing of the generation of the hot water in the steam / water mixer 18. The nozzle 28 is sprayed onto the dishes 1 and 2, and the dishes are washed and rinsed. It is said that the temperature of washing and rinsing water for tableware is about 80 ° C, but the generation of hot water at such a temperature depends on the type of heat storage material, heat capacity, diameter and length of heat transfer tubes, and heat transfer tubes. It can be achieved by appropriately selecting various parameters such as the flow rate of tap water, the flow rate of tap water through the conduit 16, and the capacity of the electric heater.

[0027]

According to the structure of the dishwashing system of the present invention, first, the hot water generated by mixing the steam and the water steering in the steam / water mixer can be used as it is as the rinsing water. In addition, a hot water storage tank or the like that requires a large space is not required, and a large installation space is not required.

Enabling the electric heater to be connected to a power source,
It only needs to be constructed so that the water supply pipe can be connected to the water tap, so it can be installed with minimal incidental work.

Since oil or gas is not used as a heat source, it is sanitary and safe.

Since a large amount of heat is stored in the heat storage material, steam is instantaneously generated and hot water is instantaneously generated by mixing the steam with water, so that a large amount of washing can be performed in a short time. .

By utilizing the heat stored by heating the electric heater during the nighttime power hours when the electricity rate is low, costs such as electricity bills as maintenance costs can be minimized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a dishware cleaning system as one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 plate 2 bowl 10 hot water generation station 11 high temperature heat storage tank 12 heat storage material 13 electric heater 13A power supply connection terminal 14 water supply pipe 15 heat transfer pipe 16 conduit 17 water quantity control valve 18 steam / water mixer 19 hot water supply pipe 20 washing station 21 washing Chamber 22 Mounting plate 23 Filtration plate 24 Drain tube 25 Holding frame 26 Water pump 27 Conduit 28 Injection nozzle

Claims (5)

[Claims] 1. A hot water generating station for generating hot water as washing water, and a washing station for arranging dishes to be washed and washing the dishes using hot water from the hot water generating station. The hot water generation station includes a high-temperature heat storage tank and a steam / water mixer, wherein the high-temperature heat storage tank includes a heat storage material, an electric heater for heating the heat storage material, and the heat storage material. And a heat transfer pipe for receiving heat stored in the heat storage material and converting water supplied through the inside into steam, wherein the steam / water mixer is provided with Receiving the steam and mixing with the water to generate hot water, wherein the washing station is configured to inject hot water from the steam / water mixer into the tableware disposed therein; means A dishwashing system comprising: 2. The dishwashing system according to claim 1, wherein the water supplied to the heat transfer tube and the steam / water mixer is tap water. 3. The dishwashing system according to claim 1, wherein the heat storage material is a mixture of a solid and a liquid. 4. The dishwashing system according to claim 3, wherein the solid is magnesia, and the liquid is a nitrate. 5. The dishwashing system according to claim 1, wherein the electric heater is selectively energized by nighttime electric power.