JPH01131991A - Water cooling heat storage type beverage cooler - Google Patents

Abstract

PURPOSE: To perform cooling at a desired temperature in an early stage without generating ice pieces inside a cooling coil by circulating a beverage inside the cooling coil even when the inside of a cooling water tank is turned to an supercooled state. CONSTITUTION: Water near a cooler 16 is cooled by the cooler 16. Further, it is agitated by an agitator 13 and cooling is performed over the entire area of a water tank. When the water temprature of the temperature-sensitive part of a thermostat 26 for valve changeover control becomes close to 0 deg.C, a contact point 27 is switched, a pump 6 is driven further and the cooled beverage is circulated from the cooling coil 10 through a bypass valve 23 and a switching valve 24 to the cooling coil 10 again. Even though the water inside the cooling water tank 17 is turned to the supercooled state at the time, the ice pieces are not generated since the inside of the cooling coil 10 is turned to a circulation stream and an ice layer is generated only near the cooler 16. Also, since the agitator is driven at all times, the beverage inside the cooling coil is cooled at the desired temperature of 0 deg.C in the early stage.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is applicable to cup-type soft drink vending machines, cold water or
This invention relates to a water-cooled thermal storage beverage cooling device used in soft drink dispensers, etc.

BACKGROUND OF THE INVENTION In recent years, beverage cooling systems have been developed, as described in Japanese Patent Publication No. 61-538, in which a cooler, which is an evaporator of a refrigerator, is inserted into a cooling water tank filled with water, and a beverage supply pipeline. There is a well-known device in which a beverage cooling coil and an electric agitator for stirring water are arranged in an immersed manner, and the beverage in the beverage cooling coil is cooled by operating a refrigerator using water in a water tank as a heat transfer medium. In this case, in order to reduce the capacity of the refrigerator, a so-called ice bank is constantly made around the cooler in the water tank, and the amount of heat stored in the ice is utilized even when the refrigerator is not operating. Generally, a method is widely adopted in which the cooling water in the tank is maintained at a low temperature, thereby instantaneously increasing the beverage cooling capacity.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional water-cooled thermal storage type beverage cooling device as described above will be described below with reference to the drawings. FIG. 5 is a system diagram of the water-cooled thermal storage type beverage cooling device, and FIG. 6 is an installation layout diagram of the temperature sensing part of the thermostat used in FIG. Moreover, FIG. 7 is an operation control circuit diagram, and FIG. 8 is a time chart of detailed cooling operation.

In FIG. 6, 1 is a drinking water source such as tap water. 2 is a drinking water tank, and 3 is a drinking water supply pipe that is drawn out from the tank 2 and is arranged to supply a drink to a cup 6 placed on a bending stage 4. 6 is a drinking water supply pump, and 7 is a drinking water supply valve disposed near the end of the pipeline 3.

8 is a beverage supply control circuit. On the other hand, beverage cooling device 9
A cooling water tank 17 filled with water 11, a cooler 16 which is an evaporator of the cooler 12 placed immersed in the water in the water tank 17, and a cooler 16 inserted in the middle of the pipeline 3 into the water tank. Beverage cooling coils 1 placed further apart
It is composed of o. Note that 14 is a compressor motor of the refrigerator 12, 15 is a drive motor of the agitator 13, and 18 is an ice bank formed on the circumferential surface of the cooler 16. Furthermore, as shown in FIG.
019 is an operation control motor for the above-mentioned Shita compressor morph 14. FIG. 7 shows a conventional basic operation control circuit, and 21 is a contact point of a thermostat for controlling compressor motor operation connected in series with the compressor motor 14.
The temperature sensing portion 19 is located apart from the cooler 16.Furthermore, 22 is a contact point of a thermostat for controlling the operation of the agitator drive motor connected in series with the agitator drive motor 15, and the temperature sensing portion 20 is It is installed in the water 11 in the water tank 17 at a sufficient distance from the cooler 16.

The operation of the water-cooled thermal storage beverage chiller configured as above will be explained below.Drinking water is always kept in the tank 2.
When a beverage supply command signal is given, the supply valve 7 opens, and at the same time the pump 6 is operated to supply the cooling coil/
Drinking water cooled at L/10 is supplied to cup 6.

In addition, when the compressor motor 14 is operated, a layer of ice formed around the cooler 16 grows and becomes an ice bank 18. When this ice bank 18 reaches a predetermined thickness, the compressor motor can be controlled and used for both purposes. The temperature sensing portion 19 of the thermostat operates when covered with a layer of ice, opens the contact 21, and stops the compressor motor 14. Once again, the ice melts and the temperature sensing part 19 becomes an ice layer! When the voltage reaches 1llN, the return operation is performed, the contact 21 is closed, and the refrigerator 12 is operated to resume operation. The agitator drive motor 15 agitates the water 11 in the water tank 17 in order to improve heat transfer characteristics. Further, as shown in the time chart shown in FIG. 8, the temperature sensing part 20 of the thermostat for controlling the operation of the agitator drive motor, which is installed in the water 11 in the water tank 17, is at a plus temperature T2 near 0° C., where the nearby water temperature is the freezing point. For example, when the temperature drops to 1.2° C., this temperature is sensed and the contact 22 opens to stop the agitator drive motor 15. In the process of cooling the water 11 in the cooling water tank 17, the water temperature near the cooler 16 is shown in B, and the water temperature in the cooling coil 1o is shown in A. When this water temperature drops to 12°C, the water 11 in the water tank 17 The cooling coil L'10 is not stirred and remains stationary, and the supercooling phenomenon is slightly limited to the area around the cooler 16, thereby preventing the inside of the cooling coil L'10 from becoming supercooled. The inside of L/10 is supercooled,
It is possible to prevent beverage jams caused by ice chips forming inside the cooling carp/L/10.

Problems to be Solved by the Invention However, in the above configuration, the temperature sensed by the motorstat 20 (the thermostat) 20 for controlling the operation of the agitator drive motor in the water tank 17 is the same. Water temperature is 0
In order to stop the agitator drive motor 16 when the water temperature reaches around ℃, the water temperature A in the cooling coil/L/10 shown in FIG.
As shown in , the time to reach the desired water temperature of 0℃ (t
2-tl) takes a very long time 0 Also, this is caused by variations in the temperature characteristics of the thermostat 20 and variations in the mounting position, and furthermore, variations in the time for the water temperature in the cooling coil/L/10 to reach the desired temperature. occurs.

In view of the above-mentioned problems, the present invention provides a water-cooled thermal storage beverage cooling device that quickly cools the beverage to a desired temperature without generating ice chips in the cooling coil. Means for Solving the Problems Above In order to solve the problems, the water-cooled thermal storage type beverage cooling device of the present invention includes a cooler that generates an ice layer on the surface, a beverage water supply pump inserted in the middle of a beverage supply pipeline, and the beverage water supply pump. a cooling coil disposed on the downstream side of the cooling coil, a bypass valve disposed on the downstream side of the cooling coil, a beverage bypass pipe, a cooling water tank filled with water and having the cooling coil and the bypass pipe disposed therein; An electric agitator stirs the water in the cooling water tank, and when it detects that the water temperature in the water tank is close to the freezing point, it operates the bypass valve and the drinking water pump, and the water in the cooling coil is activated. The system includes a beverage circulation control means for circulating water, and further includes a thermostat having a temperature sensing part that senses water temperature, and a contact point for controlling the operation of a bypass valve.

Effect of the Invention The present invention has the above-described configuration, so that even if the water temperature in the cooling water tank is cooled by the cooler and reaches a supercooled state, the pump continues to cool the water from the cooling coil through the bypass valve to the switching valve and then to the cooling coil. Because the water in the coil is circulating, the beverage in the cooling coil will not produce ice chips that would occur in a stationary state in a supercooled state.

Furthermore, since the bypass pipe is also disposed under water in the cooling water tank, the drinking water is always cooled.

Furthermore, since the agitator drive motor is constantly operating and stirring the water in the cooling water tank, the water temperature in the water tank is quickly cooled, and the beverage in the cooling coil quickly reaches the desired temperature.

EXAMPLE Hereinafter, a water-cooled thermal storage type beverage cooling device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a beverage system diagram of a water-cooled thermal storage type cooling device in one embodiment of the present invention. Further, FIG. 2 shows an embodiment of the installation of each operation control thermostat of the present invention, FIG. 3 shows an embodiment of the circuit diagram, and FIG. 4 shows a timing chart of the temperature in the water tank, etc.

Components that are the same as those in the conventional example are given the same reference numerals, explanations are omitted, and only different components will be explained.

24 is a switching valve that operates in synchronization with the bypass valve 23. A bypass pipe 25 connects the bypass valve 23 and the switching valve 24, and is disposed in the water 11 of the cooling water tank 17 similarly to the cooling carp/L/10. 26
is a temperature-sensing part of the thermostat for controlling the valve switching of the bypass valve 23 and the switching valve 24, and is installed at a sufficient distance from the cooler 16, and 27 is its contact point. The operation of the water-cooled thermal storage beverage cooling device will be explained below.The water near the cooler 16 is cooled by the cooler 16. Furthermore, when the temperature of the water at the temperature sensing part of the thermostat for zero-valve switching control, which is agitated by the agitator 13 and cools the entire area inside the water tank, reaches around 0°C, the contact 27 switches, and further The pump 6 is operated, and the cooled beverage is circulated from the cooling coil 1o through the bypass valve 23, to the switching valve 24, and again to the cooling coil μmo.

At this time, the water in the cooling water tank 1 becomes supercooled, but since there is a circulating flow inside the cooling water tank 10, no ice chips are generated, and a layer of ice grows only near the cooler 16. That will happen. In addition, at the time of sale or valve switching thermostat 2
1 is higher than the sensing temperature, the beverage passes through a thread path passing through the switching valve 24, the cooling coil/L'10, and the bypass valve 25.

As described above, the present invention provides a cooler that generates an ice layer on the surface;
A beverage water supply pump inserted in the middle of a beverage supply pipeline, a cooling coil disposed downstream of the beverage water supply pump, a bypass valve provided downstream of the cooling coil, and a beverage bypass pipe; A cooling water tank filled with water in which the cooling coil and the bypass pipe are disposed, an electric agitator that stirs the water in the cooling water tank, and a water temperature in the water tank that is close to the freezing point. Beverage circulation control means, which is a contact point for controlling the operation of a thermostat and a bypass valve, which has a temperature-sensing section that detects the water temperature to operate the bias valve and the beverage water supply pump and circulate the water in the cooling coil. By providing this, even if the inside of the cooling water tank becomes supercooled, by circulating the beverage in the cooling coil, not only no ice chips will be generated in the beverage coil, but also because the agitator is constantly operating. , it is possible to quickly cool the beverage in the cooling coil to a desired temperature of 0°C.

[Brief explanation of the drawing]

FIG. 1 is a beverage system diagram of a water-cooled thermal storage type beverage cooling device according to an embodiment of the present invention, FIG. 2 is an installation diagram of each control thermostat of this embodiment, FIG. 3 is a circuit diagram of this embodiment, and FIG. The figure is a water temperature timing chart of this embodiment, Figure 6 is a beverage system diagram of a conventional water-cooled thermal storage type beverage cooler, Figure 6 is an installation diagram of each conventional control thermostat, and Figure 7 is a conventional circuit diagram. 8th
The figure is a conventional water temperature timing chart. 16...Cooler, 6...Pump for drinking water supply, 10...Cooling coil, 23...
Bypass valve, 17... Cooling water tank, 13...
... Agitator, 26 ... Bypass pipe, 2
8...Beverage circulation control means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure and! Figure 5 Figure 6

Claims (2)

[Claims] (1) A cooler that generates an ice layer on the surface, a drinking water pump inserted in the middle of the drinking water supply pipeline, a cooling coil installed downstream of the drinking water pump, and a cooling coil installed on the downstream side of the drinking water pump. a bypass valve provided on the downstream side, a beverage bypass pipe, a cooling water tank filled with water in which the cooling coil and the bypass pipe are disposed, an electric agitator for stirring the water in the cooling water tank; The bypass valve detects that the water temperature in the water tank is close to the freezing point;
A water-cooled thermal storage type beverage cooling device comprising a beverage circulation control means that operates the beverage water supply pump and circulates water in the cooling coil. (2) The water-cooled thermal storage type beverage cooling device according to claim 1, wherein the beverage circulation control means is a thermostat having a temperature sensing part that senses water temperature and a contact point for controlling the operation of a bypass valve.