JP3190372B2 - Water-cooled thermal storage beverage cooling system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, as described in Japanese Patent Publication No. 61-538, a water-cooled regenerative beverage cooling device is provided with a cooler and a beverage cooling coil arranged in a cooling water tank filled with water.
An apparatus for cooling a beverage in the beverage cooling coil by operating a refrigerator using water in a water tank as a heat transfer medium is well known. The beverage cooling device constantly makes ice called a so-called ice bank around a cooler in a water tank, and uses the heat storage of the ice even when the operation of the refrigerator is stopped.
In general, a method of maintaining the temperature in the vicinity of ° C. and thereby enhancing the cooling capacity of the beverage is widely used.

[0003] A conventional water-cooled thermal storage beverage cooling device will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a drinking water source such as tap water. Reference numeral 2 denotes a drinking water tank, and reference numeral 3 denotes a beverage supply pipe which is drawn out from the drinking water tank 2 and is arranged to open toward the cup 5 placed on the bend stage 4. Reference numeral 6 denotes a beverage water supply pump, 7 denotes a beverage supply valve disposed near the end of the beverage supply pipe 3, and 8 denotes 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 13 a of the refrigerator 13, and the water 10 in the cooling water tank 12. A cooling device 14 disposed therein, and a beverage cooling coil 1 inserted in the middle of the beverage supply pipe 3 and disposed in the cooling water tank 12 at a distance from the cooling device 14.
5 is comprised. 16 is the cooling water tank 12
An agitator motor for agitating the inside of the cooler 14 is an ice bank formed on the peripheral surface of the cooler 14. Reference numeral 18 denotes a thermostat for controlling the operation of the agitator motor 16 which is disposed 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 for controlling the operation of the compressor 13a, which is disposed apart from the cooler 14. FIG. 9 shows a conventional operation control circuit.
Reference numeral denotes a thermostat contact for controlling the operation of the agitator motor 16. Further, reference numeral 21 denotes a contact of an operation control thermostat of the compressor 3a.

[0004] The operation of the ice-cooled thermal storage beverage cooling device configured as described above will be described below.

[0005] Drinking water is always stored in the drinking water tank 2, and when a beverage supply command signal is given by the beverage supply control device 8, the beverage supply valve 7 is opened, and at the same time, the drinking water pump 6 is operated. Drinking water cooled by the drink cooling coil 15 is supplied to the cup 5.

[0006] By the operation of the compressor 13a, a frozen layer formed around the cooler 14 grows to form an ice bank 17. When the ice bank 17 has a predetermined thickness, the thermostat heat-sensing section 1 for controlling the operation of the compressor is provided.
9 operates by being covered with the ice layer, opening the contact 21 and stopping the compressor 13a. When the ice melts and the thermostat 19 for controlling the operation of the compressor is exposed from the ice layer, a return operation is performed, the contact 21 is closed, and the compressor 1 is closed.
3a is activated to resume ice layer formation. 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 18 for controlling the operation of the agitator motor 16 shown in FIG. 10 provided in the water 10 in the cooling water tank 12 has a water temperature near the freezing point close to 0 ° C. which is the freezing point. Temperature T ₂ . For example, when the temperature drops to 1.2 ° C., this temperature is sensed, the thermostat contact 20 for operation control of the agitator motor 16 is opened, and the agitator motor 16 stops. 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
Show 6 water temperature control thermostat heat sensitive portion 18 near to A, the water temperature of A is reduced to T _2, agitation of the water 10 by the agitator motor 16 in the cooling water tank 12 for generating ice chips to the cooler 14 Stop.

[0008]

However, in the above configuration, the temperature of the water 10 in the cooling water tank 12, which is the temperature sensed by the control thermostat 18 of the agitator motor 16 in the cooling water tank 12, is close to 0 ° C. In this case, the agitator motor 16 is stopped, so that air bubbles are mixed into the ice bank 17 generated around the cooler 14, the heat storage performance is reduced, and the temperature of the cooled drinking water during continuous sale increases. Was big.

The present invention has been made in view of the above problems, and when the water temperature, which is the temperature sensed by the thermostat heat-sensitive portion, becomes close to 0 ° C.
Without stopping the electric agitator motor, a high-quality ice bank is generated by further increasing the number of revolutions of the compressor by the inverter, increasing the capacity of the cooler, and generating an ice bank around the cooler. Thus, a water-cooled regenerative cooling device with improved heat storage performance is provided.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a water-cooled regenerative beverage cooling apparatus according to the present invention comprises an agitator motor for constantly stirring water in a cooling water tank and a process for generating an ice layer in a cooler. When the water temperature of the cooling water tank drops to a temperature close to the freezing point, a determination means based on a thermostat that detects the temperature is used, and the agitator motor is not stopped.
In addition, the compressor is provided with a compressor rotation speed control means for changing the rotation speed of the compressor which has been operating up to now.

[0011]

With this configuration, when the water temperature in the cooling water tank becomes close to 0 ° C., the inverter is operated by the thermostat detected at that temperature to increase the rotation speed of the compressor, increase the ice making capacity of the cooler, and increase the agitator motor. Since the water is constantly operated to stir the water in the cooling water tank, a high quality ice bank free of air bubbles can be generated, and the heat storage performance is improved.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted.

1 to 6, reference numeral 22 denotes 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 connected to a contact 21 of a compressor control thermostat. Connected to power through. The output side of the inverter 22 is connected to the compressor 13a.
It is connected to the. Reference numeral 23 denotes a thermostat contact of the inverter 22, one end of which is a power source, and the other end of which is the inverter 2
2 connected. The control thermostat 23a of the inverter 22 is disposed in the water 10 of the cooling water tank 12 so as to be separated from the cooler 14.

In FIG. 4, reference numeral 24 denotes a judging means, which comprises a thermostat thermosensitive section 19, a thermostat contact 21, a thermostat contact 23, and a thermostat thermosensitive section 23a. Further, the compressor and the rotation speed control means 25 are constituted by an inverter 22 and the like.

The operation of the water-cooled regenerative beverage cooling apparatus configured as described above will be described. The contact point 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 thermosensitive part 23a controlled by the inverter 22 of the compressor 13a is indicated by A. , the temperature of the water 10 in the cooling water tank 12 is reduced, the compressor 13a inverter 22 controlled thermostatically sensitive portion 23a T ₂ temperature e.g. 1.2 ° C. when the temperature a has dropped to a temperature close to the freezing point or water point near the when it becomes, (step 2), the inverter 22 is activated by detecting the T ₂ temperature, increasing the frequency.

As a result, the rotation speed of the compressor 13a increases, and the refrigerating capacity increases. Therefore, from this point on, 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, the present invention provides a refrigerator including a cooling water tank filled with water, a compressor, etc., a cooler disposed inside the cooling water tank, a beverage cooling coil, and an agitator for stirring water. When the water temperature in the cooling water tank decreases to a temperature near the freezing point in the process of forming an ice layer on the motor and the cooler, without stopping the agitator motor,
The provision of the compressor rotation control means for increasing the number of rotations of the compressor, which has been operating up to now, enables the beverage in the cooling coil to be quickly cooled to a desired temperature at an early stage.

In addition, since the electric agitator motor is not stopped at the time of icing, high-quality ice improves the heat storage performance without bubbles being mixed into the ice.

[Brief description of the drawings]

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

FIG. 2 is a water temperature characteristic diagram of the water-cooled heat storage type beverage cooling device in one embodiment of the present invention.

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

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

FIG. 5 is a beverage piping diagram of a water-cooled regenerative beverage cooling device showing one embodiment of the present invention.

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

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

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

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

FIG. 10 is a water temperature characteristic diagram of a conventional water-cooled thermal storage 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)

(57) [Claims] 1. A refrigerator comprising a cooling water tank filled with water, a compressor, and the like; a cooler and a beverage cooling coil respectively disposed inside the cooling water tank; an agitator motor for stirring water; when the water temperature of the cooling water tank to the ice layer in the process of being produced was reduced to a temperature close to the freezing point to the vessel, before
A water-cooled regenerative beverage cooling device, comprising: compressor rotation control means for increasing the number of rotations of the compressor which has been operating without stopping the agitator motor .