JPH0923978A - Cooled hot water supplier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooled hot water supplier capable of instantaneously making cooled hot water and continuously and sanitarily supplying it. SOLUTION: This cooled hot water supplier is provided with a hot water tank device 4 for making boiled water and storing it, replenishing water supply devices 5 and 6 for supplying replenishing water to the hot water tank device 4, cooling devices 9, 10 and 11 for forcibly lowering the temperature of the boiled water to a prescribed temperature and making the cooled hot water in the process of passing the boiled water sent from the hot water tank device 4 and supply devices 7 and 8 for passing the boiled water inside the hot water tank device 4 to the cooling devices 9, 10 and 11 and then supplying it to the outside based on a supply command.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-cooling feeder for supplying a large amount of hot water at an appropriate temperature in a short time for powdered milk or green tea.

[0002]

2. Description of the Related Art An electric pot with a temperature maintenance control device has been known as a hot water supply device (Actually, Shokai 5).
9-70635). In this electric pot, water or hot water is boiled once in the electric pot and then naturally cooled,
It is designed so that it can be stored while maintaining a suitable temperature in an electric pot as a water bath.

[0003]

In such a conventional electric pot, since the structure is such that it can be naturally cooled, the time required to obtain the water can be increased, and the amount of the water supplied can be the capacity of the electric pot. There was a problem that was regulated by. Further, the electric pot itself does not have a function of keeping the spout and the like in a sanitary state, and there is a sanitary problem.

The present invention has been made in order to solve the above problems, and provides a hot water supply device capable of instantaneously making a hot water supply and continuously and hygienically supplying it. That is the purpose.

[0005]

In order to achieve the above-mentioned object, a hot water supply feeder according to claim 1 is a hot water tank device for producing boiling water and storing the same, and a makeup water supply for supplying makeup water to the hot water tank device. Device, a cooling device that forcibly drops the temperature of boiling water to a predetermined temperature in the process of passing boiling water sent from the hot water tank device, and a hot water tank device based on a supply command And a supply device for supplying the boiling water in the inside to the outside after passing the water through the cooling device.

In the hot-water cooling feeder of claim 1, the cooling device heat-exchanges the boiling water sent from the hot-water tank device with the cooling water for cooling the boiling water, and the cooling water to the heat exchanger. It is preferable to have a cooling water water supply device for supplying water.

According to another aspect of the present invention, there is provided a cooling water supply device, wherein the cooling water supply device includes a cooling water tank for storing the cooling water, a cooling water pump for supplying the cooling water in the cooling water tank to the heat exchanger, and a cooling water tank. To a heat exchanger via a cooling water pump.

In the hot-water cooling feeder of claim 2, the cooling-water feeding device stores the cooling water and is provided at a position higher than the hot-water tank device, and cooling from the cooling water tank to the heat exchanger. It is preferable to have a water pipe and a water supply valve interposed in the cooling water pipe.

It is preferable that the water-cooling feeder according to claim 3 or 4 further comprises an ice making device for feeding an ice block into the cooling water tank.

It is preferable that the boiling water supply device according to any one of claims 2 to 5 further comprises a boiling water supply device for passing the boiling water in the hot water tank device to the cooling water passage of the heat exchanger.

The water-boiler feeder according to any one of claims 1 to 6, further comprising a controller for controlling the operation of the cooling device and the supplying device, wherein the controller operates the supplying device in a state in which the cooling device is operated. Before, it is preferable to operate the supply device with the cooling device deactivated.

[0012]

According to the hot water supply device of claim 1, the hot water tank device produces boiling water and stores it.
The supply device is operated based on the supply instruction, the boiling water in the hot water tank device is passed through the cooling device, and then supplied to the outside.
The boiling water passed through the cooling device is forcibly lowered in temperature to a predetermined temperature by this cooling device and supplied to the outside as a chiller. Further, in the hot water tank device, the same amount of make-up water supplied to the outside as the amount of boiling water (boiling water) is supplied by the make-up water supply device. In this way, in the hot water tank device, the make-up water supplied as the hot water is constantly supplied and is stored in the boiling state, so that the hot water can be continuously supplied semipermanently. Further, since the cooling device is configured to forcibly lower the temperature of the boiling water to a predetermined temperature, a large amount of boiling water can be produced in a short time.

According to another aspect of the present invention, the cooling device sends the cooling water to the heat exchanger and the heat exchanger for exchanging heat between the boiling water and the cooling water sent from the hot water tank device. Since it is configured with the cooling water water supply device, the cooling water or the like does not mix with the boiling water, and the boiling water can be kept sterilized by boiling. Moreover, it is not necessary to consider the quality of the cooling water in terms of hygiene.

According to the third aspect of the hot water supply device, the cooling water feeding device comprises the cooling water tank, the cooling water pump for feeding the cooling water in the cooling water tank to the heat exchanger, and the cooling water pipe. Therefore, the temperature drop of the boiling water can be easily controlled by turning the cooling water pump on and off.
Also, if the cooling water sent to the heat exchanger is returned to the cooling water tank, the cooling water can be circulated and used. The cooling water tank can also be used as a heat storage tank. That is, it is possible to heat-exchange the cooling water that has been heated by exchanging heat with the boiling water in the hot water tank with the cold water that is next supplied to the hot water tank and raise the temperature thereof in the winter season.

According to the above-mentioned hot water supply device of the present invention, the cooling water supply device is constituted by the cooling water tank arranged at a position higher than the hot water tank device, the cooling water pipe and the water supply valve. Water can be sent to the heat exchanger by natural flow, and the device configuration can be simplified. In addition, by storing the cooling water in the cooling water tank,
Cooling water can be stably sent.

According to the hot-water cooling feeder of claim 5, the cooling water stored in the cooling water tank can be kept at 0 ° C. at all times by providing the ice making device for supplying the ice blocks in the cooling water tank. And the temperature difference at the time of heat exchange can be increased, and the heat exchange efficiency is improved.

According to the sixth aspect of the hot water supply device, by providing a boiling water supply device for passing the boiling water in the hot water tank device to the cooling water passage of the heat exchanger, when the boiling water is passed, the heat The cooling water flow path of the exchanger is heated, and it is possible to suppress the generation of algae on the inner wall of the cooling water flow path, and when circulating the cooling water, bacteria that corrode pipes etc. It is possible to suppress the generation of algae and algae.

According to another aspect of the present invention, the control device operates the supply device with the cooling device stopped before the control device operates the cooling device with the cooling device operated. As a result, before the start of the supply of the hot water, it is possible to pass boiling water through the hot water supply supply channel formed in the supply device or the cooling device, and the hot water supply can be disinfected at all times. .

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the water-boiler feeder according to the present invention will be described below with reference to the accompanying drawings. This hot water supply device automatically sells a hot water cooler for powdered milk or green tea, and FIG. 1 is a conceptual diagram showing the device configuration of the hot water cooler supply device. As shown in FIG. 1, the hot water supply device 1 is a hot water tank device 4 including a hot water tank 2 and an electric heater 3 immersed in the hot water tank 2, and a replenishment water supply device for supplying makeup water to the hot water tank 2. A water pipe 5 and a makeup water valve 6, a supply pipe 7 and a supply valve 8 which are supply devices for supplying hot water from the hot water tank 2, a heat exchanger 9 interposed in the supply pipe 7, and cooling water to the heat exchanger 9. A cooling water pump 10 for supplying water, a cooling water tank 11 for storing the cooling water,
An ice making unit (ice making device) 12 that produces ice blocks from the cooling water in the cooling water tank 11 and a controller (control means) 13 that controls the operation of the boiling water supply device 1 are provided. Also,
The hot water tank 2 and the heat exchanger 9 are communicated with each other via a boiling water pipe 14 and a boiling water valve 15 which are boiling water supply devices.

The water supplied to the hot water tank 2 through the makeup water pipe 5 is heated by the electric heater 3 to be boiled and stored as boiling water. When a sales command is issued from this state, the supply valve 8 is opened, the boiling water in the hot water tank 2 is cooled through the heat exchanger 9, and is supplied to the outside as a chiller. At that time, cooling water is passed through the heat exchanger 9 by the cooling water pump 10. This cooling water is kept at 0 ° C. in the cooling water tank 11 by the ice making unit 12,
It is circulated and supplied to the heat exchanger 9 via the cooling water pump 10.

The hot water tank 2 is made of a corrosion-resistant material, for example, stainless steel, etc., and the makeup water pipe 5 is connected to the upper part, the supply pipe 7 is connected to the middle part, and the boiling water pipe 14 is connected to the lower part. . A make-up water valve 6 made up of an electromagnetic valve is interposed in the make-up water pipe 5, while a float switch 16 is provided in the hot water tank 2. When the float switch 16 detects a drop in the full water level, the makeup water valve 6 is opened, and tap water is appropriately supplemented (supplied) from the makeup water pipe 5 into the hot water tank 2.

A supply valve 8 composed of an electromagnetic valve is interposed in the supply pipe 7, and the supply valve 8 is opened in response to a sales command so that the boiling water in the hot water tank 2 is transferred to the heat exchanger 9. After passing water and being cooled to an appropriate temperature here, it is supplied to the outside as a chiller. Further, this supply valve 8 is provided with a cooling water pump 10
The valve is periodically opened with the water being stopped, and boiling water is passed through this supply system. Thereby, the supply pipe 7 and the heat exchanger 9
Boiling water is passed through the primary side flow path 17 to perform hot water sterilization, and the supply system is appropriately sterilized to maintain hygiene.

Further, a boiling water valve 15 composed of an electromagnetic valve is interposed in the boiling water pipe 14, and by opening the boiling water valve 15, the secondary side flow path (cooling of the heat exchanger 9) Boiling water can be passed through the water flow path) 18. The downstream end of the boiling water pipe 14 is connected to the upper portion of the heat exchanger 9, while the drain pipe 19 and the drain valve 20 are connected to the lower portion of the heat exchanger 9. The water drain valve 20 is an electromagnetic valve, and the water drain pipe 19 communicates with the cooling water tank 11. The water flow to the heat exchanger 9 of the boiling water is performed when the hot water supply device 1 is on sale. At that time, the drain valve 19 and the boiling water valve 15 are opened. The boiling water is passed through the secondary side flow path 18 of the heat exchanger 9. The boiling water is collected in the cooling water tank 11 through the drain pipe 19 and reused as cooling water. Reference numeral 21 in the figure
Is a check valve interposed in the boiling water pipe 14 and prevents the cooling water sent by the cooling water pump 10 from flowing back to the hot water tank 2 side.

In this way, the secondary side flow path 18 of the heat exchanger 9
It is possible to prevent algae and other germs from propagating in the secondary side flow path 18 by passing boiling water to the second side flow path 18, and thus to propagate algae and other germs that promote corrosion of piping etc. throughout the cooling water system. Can be suppressed. At the same time, algae and the like do not adhere to the secondary side flow path 18, and it is possible to suppress a decrease in heat exchange efficiency. The above-mentioned supply valve 8
May be a three-way valve, and the supply valve 8 and the boiling water valve 15 may be combined. Further, the boiling water may be drained to the outside of the cooling water tank 11 via the drain pipe 19.

On the other hand, below the hot water tank 2, an electric heater 3 and a water temperature detection sensor 22 are arranged, and the electric heater 3 is controlled based on the detection result of the water temperature detection sensor 22. That is, the electric heater 3 is the hot water tank 2
ON-O so that the water inside keeps boiling (about 95 ° C)
FF is performed. In this case, the tap water (normal temperature) supplied from the makeup water pipe 5 collects in the lower part of the hot water tank 2, so that the electric heater 3 is arranged in the lower part of the hot water tank 2 and the supply pipe 7 for supplying the boiling water. The connection position is arranged in the middle part of the hot water tank 2.

The heat exchanger 9 is of a water tank type in which a primary side flow passage 17 which is a flow passage for boiling water is formed in a coil shape.
An inflow port 9a and an outflow port 9b are formed in the upper part. A cooling water outflow pipe 23 extending from the cooling water pump 10 is connected to the inflow port 9a, and a cooling water return pipe 24 reaching the cooling water tank 11 is connected to the outflow port 9b. The cooling water sent through the cooling water pump 10 receives the inflow port 9a.
Flows into the heat exchanger 9 from where it exchanges heat with the boiling water (water-water heat exchange) and is returned to the cooling water tank 11 from the outlet 9b. In this case, the length and pipe diameter of the primary side flow path 17 are determined by the discharge amount of the cooling water pump 10 and the temperature of the cooling water (0 ° C.).
In consideration of heat exchange efficiency, boiling water of 95 ° C on the inlet side is designed to be heated to 50 ° C on the outlet side.

In this embodiment, the inflow port 9a is provided above the heat exchanger 9 so that the cooling water pump 10 is not affected by heat when the boiling water is passed through the secondary side flow passage 18. Although a check valve is provided near the inlet 9a,
You may provide a in the lower part of the heat exchanger 9. With this configuration, the structure of the heat exchanger 9 is a counterflow type (the primary side and the secondary side flow in opposite directions), and heat exchange efficiency can be improved.

The cooling water system is composed of the cooling water going pipe 23 and the cooling water returning pipe 24, and the cooling water pump 10 interposed in the cooling water going pipe 23. The cooling water in the cooling water tank 11 is sent by the cooling water pump 10 to the heat exchanger 9 via the cooling water forward pipe 23, and further from the heat exchanger 9 to the cooling water tank 11 via the cooling water return pipe 24. Returned inside.
That is, the cooling water is recycled. The heat exchanger 9
The secondary side flow passage 18 is drained of cooling water by the water drain valve 20 except when the cooling water pump 10 is driven, so that dew condensation does not occur in the primary side flow passage 17 of the heat exchanger 9. It has become. This prevents miscellaneous bacteria from propagating in the primary side flow path 17.

The ice making unit 12 comprises an ice making device 25 and a refrigerant pipe 26 connected to the ice making device 25, and a part of the refrigerant pipe 26 is immersed in the cooling water tank 11. In this case, the cooling water in contact with the refrigerant pipe 26 is frozen to form an ice block, and the cooling water in the cooling water tank 11 is always kept at 0 ° C. That is, the cooling water sent to the heat exchanger 9 by the cooling water pump 11 has a temperature of approximately 0 ° C., and the temperature difference between the cooling water and the boiling water that exchanges heat can be maximized. As a result, the heat exchange efficiency of the heat exchanger 9 can be increased. In addition, the code | symbol 27 in a figure is
It is a water temperature detection sensor that detects the temperature of the cooling water in the cooling water tank 11.

Now, the control of each part and the whole by the controller 13 will be described. The description of the connection between the controller 13 and each device will be made with reference to the drawings, and the description thereof will be omitted. As described above, the makeup water valve 6 is controlled based on the detection result of the water level by the float switch 16. The make-up water valve 6 is opened and closed so that the float switch 16 detects the full water level in the hot water tank 2, and the hot water tank 2 is always kept full.

The supply valve 8 is controlled based on the sterilization command and the sales command from the controller 13. For example, when a sterilization command is issued just before the start of sales or every dozens of times of sales, the supply valve 8 opens and boiling water flows through the supply pipe 7 and the primary side flow path 17 of the heat exchanger 9. To be watered. In this case,
The hot water supply device 1 is in a sales stop state. Further, in the sales command based on the push button of the customer, the supply valve 8 is pressed while the push button is pressed.
Is opened, the boiling water in the hot water tank 2 is passed through the heat exchanger 9, and is continuously supplied to the outside as a chiller.

Similarly, the boiling water valve 15 and the drainage valve 20
Are controlled based on the sterilization command from the controller 13.
Similarly to the above, when the sterilization command is issued just before the start of sales or every tens of sales, the water drain valve 20 opens and the cooling water in the secondary side flow path 18 of the heat exchanger 9 is released. After being removed, the boiling water valve 15 opens, and the boiling water flows through the boiling water pipe 14 to the secondary side flow path 18 of the heat exchanger 9.

The electric heater 3 is controlled based on the detection result of the water temperature detection sensor 22 of the hot water tank 2. The electric heater 3 is turned on and off so that the water temperature detection sensor 22 detects boiling of the hot water in the hot water tank 2 (95 ° C.), that is, the hot water in the hot water tank 2 maintains the boiling state.

The cooling water pump 10 is controlled based on the sales command. Cooling water pump 1 when sales order is issued
0 is driven, and cooling water is passed through the secondary side flow path 18 of the heat exchanger 9. In this case, the supply valve 7 is also opened by the sales command, but the supply valve 7 is opened after waiting for a certain period of time before the cooling water pump 10 is driven. That is, the cooling water is passed through the secondary side flow path 18 of the heat exchanger 9 to
After making the state of heat stable, boiling water is caused to flow into the primary side flow path 17 of the heat exchanger 9 so as to obtain the desired temperature. The water drain valve 20 is the cooling water pump 1
The valve is closed immediately before the 0 drive starts.

The ice making unit 12 is controlled based on the detection result of the water temperature detection sensor 27 provided in the cooling water tank 11. When the water temperature detection sensor 27 detects a water temperature of, for example, about 2 to 3 ° C., it is determined that the ice blocks have melted, and the ice making unit 12 is turned ON-OF so that the temperature of the cooling water becomes 0 ° C.
Perform F control. The controller 13 determines when the cooling water tank 11 is free of ice blocks and when the primary side flow path 17 of the heat exchanger 9 is used.
And while boiling water is being passed through the secondary side flow path 18, the water-cooling feeder 1 is put into a sales stop state.

As described above, according to the present embodiment, in the process of supplying the boiling water, boiling water stored by boiling is passed through the heat exchanger 9 to forcibly turn it into a boiling water. Since the boiling water tank 2 is supplied with the same amount of tap water as the supplied hot water, it is possible to always prepare a sufficient amount of boiling water. Can be supplied to a large-scale water-boiler feeder 1 different from the conventional electric pot.

In the above embodiment, a water-cooling type using a heat exchanger is adopted as the cooling device, but an air-cooling type using a fan or the like may be used. Further, the cooling water tank may be arranged at a position higher than the hot water tank, and the cooling water may be supplied to the heat exchanger by gravity flow. With this configuration, the cooling water pump can be omitted, and the device configuration can be simplified. Further, in a hospital or the like, if hot water tanks and heat exchangers are provided at various places and a heat storage tank for air conditioning is used as a cooling water tank, the hot water supply device can be a low cost central system.

[0038]

As described above, according to the hot water feeder of the present invention, in the process of feeding the hot water, the boiling water is forcibly lowered in temperature to make the hot water, so that a large amount of hot water is semipermanent. Can be continuously supplied continuously, and a large amount of water can be instantly produced. Also, since the boiling water is passed through the supply device,
The hot water can be supplied extremely hygienically.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a device configuration of a hot water dispenser according to an embodiment of the present invention.

[Explanation of symbols]

 1 Hot Water Supply Machine 2 Hot Water Tank 3 Electric Heater 4 Hot Water Tank Device 5 Makeup Water Pipe 6 Makeup Water Valve 7 Water Supply Pipe 8 Water Supply Valve 9 Heat Exchanger 10 Cooling Water Pump 11 Cooling Water Tank 12 Ice Making Unit 13 Controller 14 Boiling Water Pipe 15 Boiling Water valve 17 Primary side flow path 18 Secondary side flow path 23 Cooling water forward pipe 24 Cooling water return pipe

Claims (7)

[Claims] 1. A hot water tank device for producing boiling water and storing the same, a make-up water supply device for supplying make-up water to the hot water tank device, and a passage of boiling water sent from the hot water tank device. In the process, a cooling device that forcibly lowers the temperature of boiling water to a predetermined temperature to create a chiller, and based on a supply command, the boiling water in the hot water tank device is supplied to the outside after passing through the cooling device. Supply device
A hot water supply machine characterized by being equipped. 2. The heat exchanger for exchanging heat between the boiling water sent from the hot water tank device and the cooling water for cooling the cooling water, and the cooling water for sending the cooling water to the heat exchanger. A water supply device according to claim 1, further comprising a water supply device. 3. The cooling water supply device comprises a cooling water tank for storing cooling water, a cooling water pump for supplying the cooling water in the cooling water tank to the heat exchanger, and a cooling water pump from the cooling water tank. A cooling water pipe through the above to the heat exchanger,
The hot water supply machine according to claim 2, characterized by having. 4. The cooling water sending device stores a cooling water and is arranged at a position higher than the hot water tank device, and a cooling water pipe from the cooling water tank to the heat exchanger. A water supply valve interposed in the cooling water pipe,
The hot water supply machine according to claim 2, characterized by having. 5. The water-bath supply machine according to claim 3, further comprising an ice making device for supplying an ice block into the cooling water tank. 6. The boiling water supply device for passing the boiling water in the hot water tank device to the cooling water flow path of the heat exchanger, as claimed in any one of claims 2 to 5. Hot water supply machine. 7. A control device for controlling the operation of the cooling device and the supply device is further provided, and the control device controls the operation of the cooling device before the operation of the supply device in the operated state of the cooling device. 7. The water-bath supply machine according to claim 1, wherein the supply device is operated in a state in which the operation is stopped.