JPH0526558A - Water-cooled heat accumulation type beverage cooling device - Google Patents

Abstract

PURPOSE:To produce water of good quality without over-cooling of an interior side of a cooling water tank by a cooler in a water tank and to improve a heat accumulation performance. CONSTITUTION:In the case that a temperature of water 10 within a cooling water tank 12 is decreased and a water temperature near a thermostat 23 for judging ON-OFF of an inverter 22 of a compressor 13a is lowered to an icing point or a temperature near its icing point, this temperature is detected, the inverter 22 is operated, its frequency is increased, a freezing capability of the compressor 13a is improved and then ice is generated at a surface of a cooling device 14. In addition, an agitating motor 16 is not stopped, resulting in that the water shows rapidly a desired beverage temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-cooled heat storage type beverage cooling device used for a beverage dispenser of a cup type beverage vending machine.

[0002]

2. Description of the Related Art In recent years, a water-cooled heat storage type beverage cooling device has a cooler and a beverage cooling coil arranged in a cooling water tank filled with water as described in Japanese Patent Publication No. 61-538.
There is known a device for cooling the beverage in the beverage cooling coil by using the water in the water tank as a heat transfer medium by operating the refrigerator. The beverage chiller constantly makes ice around the cooler in the water tank, so-called ice bank, and uses the stored heat of the ice even when the refrigerator is not operating.
Generally, a method of maintaining the temperature in the vicinity of 0 ° C. to enhance the beverage cooling capacity is widely adopted.

A conventional water-cooled heat storage type beverage cooling device will be described below with reference to FIGS. In the figure, 1 is a drinking water source such as tap water. Reference numeral 2 is a drinking water tank, and 3 is a beverage supply pipe arranged so as to be drawn out from the drinking water tank 2 and opened toward a cup 5 placed on the bend stage 4. Reference numeral 6 is a beverage water supply pump, 7 is a beverage supply valve disposed near the end of the beverage supply pipe 3, and 8 is a beverage supply control device. On the other hand, the beverage cooling device 9 includes a cooling water tank 12 filled with water 10, a refrigerator 13 provided below the cooling water tank 12, a compressor 13a of the refrigerator 13 and the water 10 in the cooling water tank 12. Beverage cooling coil 1 disposed between the disposed cooler 14 and the beverage supply pipe 3 and in the cooling water tank 12 spaced apart from the cooler 14.
It is composed of 5 and 5. In addition, 16 is the cooling water tank 12
An agitator motor that stirs the inside, and 17 is an ice bank formed on the peripheral surface of the cooler 14. Reference numeral 18 denotes a thermostat heat-sensitive section for operation control of the agitator motor 16 provided in the water 10 of the cooling water tank 12 so as to be separated from the cooler 14. Reference numeral 19 denotes a thermostat heat-sensitive portion for operation control of the compressor 13a, which is arranged apart from the cooler 14. Further, FIG. 9 shows a conventional operation control circuit.
Is a contact of a thermostat for controlling the operation of the agitator motor 16. Further, reference numeral 21 is a contact of a thermostat for operation control of the compressor 3a.

The operation of the ice-cold heat storage type beverage cooling device configured as described above will be described below.

Drinking water is always stored in the drinking water tank 2. When a beverage supply control device 8 gives a beverage supply command signal, the beverage supply valve 7 is opened, and at the same time, the beverage water supply pump 6 is operated. Drinking water cooled by the beverage cooling coil 15 is supplied to the cup 5.

[0006] By the operation of the compressor 13a, an ice layer formed around the cooler 14 grows and becomes an ice bank 17. When the ice bank 17 has a predetermined thickness, the thermostat heat-sensitive part 1 for controlling the operation of the compressor.
9 operates by being covered with an icing layer to open the contact 21 and stop the compressor 13a. Further, when the ice melts and the thermostat heat-sensitive part 19 for controlling the operation of the compressor is exposed from the ice layer, the restoring operation is performed and the contact 21 is closed, and the compressor 1
3a is activated and ice layer formation is restarted. At this time, the agitator motor 16 is stirring the water 10 in the cooling water tank 12 in order to improve the heat transmission characteristics.

Further, as shown in the time chart of FIG. 10, the thermostat heat-sensitive portion 18 for operation control of the agitator motor 16 of FIG. 10 provided in the water 10 in the cooling water tank 12 has a water temperature near 0 ° C. which is a freezing point. Temperature T ₂ . For example, when the temperature drops to 1.2 ° C., this temperature is sensed, the operation control thermostat contact 20 of the agitator motor 16 is opened, and the agitator motor 16 is stopped. As shown in FIG. 10, in the process of cooling the water 10 in the cooling water tank 12, the water temperature near the cooler 14 is set to B, and the agitator motor 1 is set.
6 The water temperature in the vicinity of the control thermostat heat-sensitive part 18 is indicated by A. When the water temperature of A falls to T ₂ , ice chips are generated in the cooler 14, so that the stirring of the water 10 by the agitator motor 16 in the cooling water tank 12 is prevented. Stop.

[0008]

However, in the above-mentioned configuration, the temperature of the water 10 in the cooling water tank 12 which is the temperature sensed by the control thermostat heat sensitive portion 18 of the agitator motor 16 in the cooling water tank 12 is around 0 ° C. When this happens, the agitator motor 16 is stopped, so air bubbles are mixed in the ice bank 17 generated around the cooler 14, heat storage performance is reduced, and the temperature of the cooled drinking water rises during continuous sales. Was great.

In view of the above-mentioned problems, the present invention provides a thermostat heat-sensing section, when the water temperature is around 0 ° C.,
Without stopping the electric agitator motor, the rotation speed of the compressor is further increased by the inverter, the capacity of the cooler is increased, and an ice bank is generated around the cooler, so that a good-quality ice bank is generated. As a result, a water-cooled heat storage type cooling device having improved heat storage performance is provided.

[0010]

In order to solve the above-mentioned problems, a water-cooled heat storage type beverage cooling apparatus of the present invention is provided with an agitator motor for constantly stirring water in a cooling water tank, and a process of generating an ice layer in a cooler. A determination means using a thermostat that detects when the water temperature of the cooling water tank has dropped to a temperature close to the freezing point, and a compressor rotation speed control means that changes the rotation speed of the compressor that has been operating up to now Is.

[0011]

With this configuration, when the water temperature in the cooling water tank becomes close to 0 ° C., the thermostat that detects the temperature activates the inverter to increase the rotation speed of the compressor and increase the ice making capacity of the cooler, thereby increasing the agitator motor. Since it constantly operates to stir the water in the cooling water tank, it is possible to generate a good-quality ice bank in which air bubbles are not mixed, and the heat storage performance is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

1 to 6, reference numeral 22 is an inverter for controlling the rotation speed of the compressor 13a of the refrigerator 13, one end of which is directly connected to a power source and the other end of which is provided with a contact 21 of a compressor controlling thermostat. Connected to the power supply. The output side of the inverter 22 is connected to the compressor 13a.
It is connected to the. Reference numeral 23 is a contact of a thermostat of the inverter 22, one end of which is a power source and the other end of which is the inverter 2
Connected to 2. Further, the control thermostat heat-sensitive portion 23a of the inverter 22 is arranged in the water 10 of the cooling water tank 12 so as to be spaced apart from the cooler 14.

In FIG. 4, reference numeral 24 is a judging means, which comprises a thermostat heat-sensitive section 19, a thermostat contact 21, a thermostat contact 23, and a thermostat heat-sensitive section 23a. The compressor and the rotation speed control means 25 are composed of an inverter 22 and the like.

The operation of the water-cooled heat storage type beverage cooling device configured as described above will be described. The contact 21 of the thermostat that controls the generation of the ice bank 17 in the cooling water tank 12 is closed, and the compressor 13a operates. (Step 1) In the process of cooling the water 10 in the cooling water tank 12, the water temperature in the vicinity of the cooler 14 is indicated by B, and the water temperature in the vicinity of the thermostat heat-sensitive part 23a controlled by the inverter 22 of the compressor 13a is indicated by A. When the temperature of the water 10 in the cooling water tank 12 decreases and the water temperature A near the thermostat heat-sensitive part 23a that controls the inverter 22 of the compressor 13a decreases to a freezing point or a temperature close to the water point, T ₂ temperature, for example, 1.2 ° C. When this occurs, (step 2), the inverter 22 is activated by detecting the T ₂ temperature and the frequency is increased.

As a result, the number of revolutions of the compressor 13a is increased and the refrigerating capacity is increased. Therefore, from this point of time, the capacity of the cooler 14 provided in the cooling water tank 12 increases and ice nuclei are generated on the surface of the cooler 14.

Further, since the agitator motor 16 is constantly operated to increase the capacity of the cooler 14, the desired beverage sensitivity is reached early.

[0018]

As described above, according to the present invention, a refrigerator constituted by a cooling water tank filled with water, a compressor, etc., a cooler arranged inside the cooling water tank, a beverage cooling coil, and an agitator for stirring water are provided. Compressor rotation control for increasing the rotation speed of the compressor that has been operating until now when the water temperature in the cooling water tank drops to a temperature close to the freezing point in the process of forming an ice layer in the motor and the cooler By providing the means, the beverage in the cooling coil can be rapidly cooled to a desired temperature at an early stage.

Further, since the electric agitator motor is not stopped at the time of ice accretion, bubbles are not mixed in the ice and the heat storage performance is improved by the good quality ice.

[Brief description of drawings]

FIG. 1 is a rotation speed control circuit diagram of a water cooling heat storage type beverage cooling device according to an embodiment of the present invention.

FIG. 2 is a water temperature characteristic diagram of a water cooling heat storage type beverage cooling device according to an embodiment of the present invention.

FIG. 3 is a flowchart of a water-cooled heat storage type beverage cooling device according to an embodiment of the present invention.

FIG. 4 is a block diagram of a water-cooled heat storage type beverage cooling device according to an embodiment of the present invention.

FIG. 5 is a beverage piping diagram of a water-cooled heat storage type beverage cooling device showing an embodiment of the present invention.

FIG. 6 is a mounting view of each control thermostat of the water-cooled heat storage type beverage cooling device showing an embodiment of the present invention.

FIG. 7 is a front view showing a state in which each control thermostat of the conventional water-cooled heat storage type beverage cooling device is attached.

FIG. 8 is a beverage piping diagram of a conventional water-cooled heat storage type beverage cooling device.

FIG. 9 is an operation control circuit diagram of a conventional water-cooled heat storage type beverage cooling device.

FIG. 10 is a water temperature characteristic diagram of a conventional water cooling heat storage type beverage cooling device.

[Explanation of symbols]

 3 Beverage Supply Pipe 10 Water 12 Cooling Water Tank 13 Refrigerator 13a Compressor 14 Cooler 15 Beverage Cooling Coil 16 Electric Agitator Motor 22 Inverter 25 Refrigerator Rotation Control Means

Claims (1)

Claims: 1. A refrigerator comprising a cooling water tank filled with water, a compressor, etc., a cooler and a beverage cooling coil respectively arranged inside the cooling water tank, and water is stirred. An agitator motor and a compressor that increases the rotational speed of the compressor that has been operating until now when the water temperature in the cooling water tank drops to a temperature close to the freezing point in the process of forming an ice layer in the cooler. A water cooling heat storage type beverage cooling device comprising: a rotation control means.