JP2589744B2 - Water-cooled thermal storage beverage cooling system - Google Patents

Description

The present invention relates to a cup-type soft drink vending machine, cold water or
The present invention relates to a water-cooled heat storage type beverage cooling device used for a soft drink dispenser or the like.

2. Description of the Related Art In recent years, as described in Japanese Patent Publication No. 60-37381, a beverage cooling apparatus has a cooling water tank filled with water and a cooler, which is an evaporator of a refrigerator, inserted into a beverage supply pipeline. An apparatus is known in which a beverage cooling coil and an electric agitator for stirring water are immersed and arranged, 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, for the purpose of reducing the capacity of the refrigerator, ice called 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 used even when the operation of the refrigerator is stopped. A method of maintaining the internal cooling water at a low temperature and thereby instantaneously increasing the beverage cooling capacity has been widely adopted.

Hereinafter, a conventional water-cooled thermal storage beverage cooling device as described above will be described with reference to the drawings. FIG. 5 is a system diagram of the water-cooled regenerative beverage cooling device, FIG. 6 is an operation control circuit diagram, and FIG. 7 is a time chart of a cooling operation progress.

In FIG. 5, reference numeral 1 denotes a drinking water source such as tap water. 2
Reference numeral 3 denotes a drinking water supply pipe which is drawn out of the tank 2 and 3 is disposed so as to open toward the cup 5 placed on the bend stage 4. Reference numeral 6 denotes a beverage water supply pump, reference numeral 7 denotes a beverage supply valve disposed near the end of the pipeline 3, and reference numeral 8 denotes a beverage supply control circuit. On the other hand, the beverage cooling device 9 is provided with a cooling water tank 17 filled with water 11, a cooler 16 which is an evaporator of the refrigerator 12 arranged immersed in the water 11, and inserted in the middle of the pipeline 3 to form a water tank. And a beverage cooling coil 10 arranged at a distance from the cooler 16. Reference numeral 14 denotes a compressor motor of the refrigerator 12, reference numeral 15 denotes an agitator drive motor, and reference numeral 18 denotes an ice bank generated on the peripheral surface of the cooler 16. Reference numeral 19 denotes an ice sensor which is installed close to the surface of the cooler 16 and has a pair of electrode rods 20. It is configured to detect the formation of an ice layer on the surface of the device and to output an ice detection signal from the conversion circuit 21. S denotes an agitator operation control contact, which is inserted in the power supply circuit of the agitator drive motor 15.

The operation of the water-cooled heat storage beverage cooling device configured as described above will be described below. The contact S is closed based on an ice detection signal from the ice sensor 19. That is, while no ice is generated, the electrical resistance between the electrode rods 20 is small, and no signal is output from the conversion circuit 21, so that the contact point S is open. With the operation of the refrigerator 12, an ice layer of the ice bank 18 is generated on the surface of the cooler 16, and when the electrode rod 20 is covered with the ice layer, the interelectrode resistance increases and the conversion circuit 21 An ice detection signal is output, the contact S is closed, and the agitator drive motor 15 is closed.
It operates to start the operation.

According to the above control, in the cooling process of generating the ice bank 18, the contact S is opened and the operation is stopped at least until the ice layer is formed on the surface of the cooler 16 in the agitator drive motor 15, and the operation is stopped. The operation is started by closing the contact point S from the time when the occurrence is detected by the ice sensor 19. Therefore, the water 11 in the cooling water tank 17 is not agitated until the ice is generated on the surface of the cooler 16 in a water temperature range near 0 ° C., so that the water 11 is kept stationary.

However, in the above configuration, the cooling water tank 17
In the water temperature range of 0 ° C. in the vicinity of 0 ° C., the ice is not stirred until ice is generated on the surface of the cooler 16,
As shown by the water temperature A in the cooling coil 10 shown in FIG.
The time to reach the desired 0 ° C. water temperature (t ₂ −t ₁ ) is very long. In addition, since the agitator drive motor is stopped at the initial stage of ice making, air bubbles are mixed in the stopped ice making ice bank, so that the ice quality is poor, which adversely affects the heat storage performance of the ice and is sold during continuous sales. There was a problem that the number was reduced. In addition, if the agitator is temporarily stopped, the water temperature in the water tank may be transferred to the agitator drive motor to cool the motor, dew may be formed inside, and the motor insulation may be deteriorated.

In view of the above problems, the present invention does not supercool the water in the cooling water tank and does not supercool the water in the cooling coil,
An object of the present invention is to provide a water-cooled regenerative beverage cooling device that cools to a desired temperature at an early stage and generates a high-quality ice bank that is not generated by a cooler and air bubbles are not mixed into an eye bank.

Means for Solving the Problems In order to solve the above-mentioned problems, the water-cooled regenerative beverage cooling device of the present invention has an electric agitator for stirring water in a cooling water tank and an ice layer formed on the surface of the cooler. It is provided with an ice sensor for detecting, and a rotational speed control contact of the agitator drive motor for switching the rotational speed of the agitator drive motor.

Function The present invention has the above-described configuration, and when the water temperature in the cooling water tank is close to 0 ° C., the number of rotations of the agitator is reduced at a low speed until the ice layer is detected on the surface of the cooler without water. The water in the cooling water tank is not supercooled, and the beverage in the cooling coil does not freeze.

In addition, the agitator drive motor always operates and agitates the water in the cooling water tank, so that a high-quality ice bank is generated, the water in the water tank is cooled early, and the beverage in the cooling coil is also released as soon as desired. Temperature will be reached.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a water-cooled thermal storage beverage cooling device according to an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 15 denotes an agitator drive motor for rotation control having an H (high-speed rotation) terminal and an L (low-speed rotation) terminal, and P switches an agitator drive for rotation control by switching contacts based on an ice detection signal of an ice sensor 19. A rotation speed control contact of the rotation control agitator drive motor for switching the rotation speed of the motor 15; the rotation control agitator drive motor 15
Power supply circuit.

The operation of the water-cooled thermal storage beverage cooling device configured as described above will be described.

First, while no ice is generated, the electric resistance between the electrode rods 20 is small, and no signal is output from the conversion circuit 21, so that the rotation speed control contact P is at the L (low speed rotation) side contact, The agitator drive motor 15 for control is rotating at low speed (about 500 rpm). When the refrigerator 12 is operated, an ice layer of the ice bank 18 is generated on the surface of the cooler 16, and when the electrode rod 20 is covered with the ice layer, the interelectrode resistance increases and the conversion is performed. An ice detection signal is output from the circuit 21, the rotation speed control contact P switches from the L (low speed rotation) contact to the H (high speed rotation) contact, and the agitator drive motor 15 for rotation control is driven by a high speed circuit (approximately 1700 rpm).

That is, since the present invention operates the agitator 13 continuously, not only cools the beverage in the cooling coil to the desired temperature 0 ° C. early, but also operates the agitator 13 continuously, By stopping the agitator 13, high-quality ice bank 18 can be made without air bubbles entering the ice bank 18, and high-performance cooling performance can be exhibited.

A second embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is an operation control circuit diagram of a water-cooled regenerative beverage cooling apparatus showing a second embodiment, and FIG. It is a time chart of progress.

In the figure, the agitator drive motor for rotation control
A switching contact Q and a NO side of a contact T _S1 of a water temperature thermostat for detecting the water temperature of the tank water 11 are connected in series to the 15 L-side power supply circuit, and the switching contact Q is connected in series with the compressor motor 14. It is connected in series with the contact T _{S2 of the} compressor motor operation control thermostat and in parallel with the NO side of the contact T _S1 of the water temperature thermostat.
Next, the H-side power supply circuit of the agitator drive motor 15 for rotation control includes the rotation speed control contact P, a relay contact X that closes based on the beverage supply command signal, and the NC side of the contact T _S1. They are connected in parallel and inserted.

The operation of the water-cooled heat storage beverage cooling device configured as described above will be described below.

The operation result of the agitator drive motor 15 for rotation control is as shown in FIG. 5 by the opening / closing operation of each operation control contact T _S1 , T _S2 , X, P, Q of the agitator drive motor 15 for rotation control.
That is, Q is a normally closed contact, and the freezing layer starts to be formed in the process of cooling the water tank water 11 and forming the ice bank 18.
In the water temperature range around ℃, the water temperature thermostat contact T
_S1 closes to NO side and agitator drive motor 15 for rotation control
Is energized to the L side to start low-speed rotation. When the contact T _S2 of the compressor motor operation control thermostat closes, the drive motor 15 for rotation control similarly rotates at a low speed. However, at this time, when the contact X is closed based on the beverage supply command signal, the switching contact Q is opened and the agitator drive motor 15 for rotation control is energized to the H side to start high-speed rotation. When the rotation speed control contact P is closed in response to a signal from the ice sensor 19, the switching contact Q is opened and the agitator drive motor 15 for rotation control is energized to the H side to start high-speed rotation.

As described above, the agitator drive motor 15 for rotation control
On the L side, a switching contact Q and a NO side of a contact T _S1 of a water temperature thermostat for detecting the water temperature of the water tank water 11 are connected in series.
The switching contact Q is connected in series with the contact T _{S2 of} the compressor motor operation control thermostat connected in series with the compressor motor 14 and in parallel with the NO side of the contact T _S1 of the water temperature thermostat. The H-side power supply circuit of the agitator drive motor 15 for rotation control has a rotation speed control contact P
And a relay contact X that closes based on the beverage supply command signal
And the NC side of the contact T _S1 are connected in parallel to each other, so that the cooling operation can be performed with high heat transmission efficiency even at the time of beverage supply.

As described above, the present invention provides an electric agitator that stirs water in a cooling water tank, and an ice sensor that is installed near the surface of the cooler and detects the formation of an ice layer on the surface of the cooler. When,
By providing an agitator drive motor for driving the agitator and a rotation speed control contact of the agitator drive motor for switching a contact based on an ice detection signal of the ice sensor to switch a rotation speed of the agitator drive motor, the agitator is continuously operated. In operation, not only the beverage in the cooling coil is cooled to the desired temperature of 0 ° C. at an early stage, but also because the agitator is continuously operated, the agitator is stopped so that air bubbles are generated in the ice bank 18. The ice bank 18 of good quality can be made without mixing of water, so that high-performance cooling performance can be exhibited. In addition, since the agitator is operated continuously without stopping even temporarily, the water temperature in the water tank is transferred to the agitator drive motor to cool the motor, and there is no danger that the motor will be dewed to cause deterioration of the motor insulation.

[Brief description of the drawings]

FIG. 1 is an operation control circuit diagram of a water-cooled regenerative beverage cooling apparatus according to a first embodiment of the present invention, FIG. 2 is a time chart of a cooling operation progress according to FIG. 1, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is an operation control circuit diagram of the water-cooled heat storage type beverage cooling device in the embodiment, FIG. 4 is a time chart of the cooling operation progress according to FIG. 3, FIG. 5 is a piping diagram of a general water-cooled heat storage type beverage cooling device, FIG. Fig. 7 is an operation control circuit diagram of a conventional water-cooled regenerative beverage cooling device, and Fig. 7 is a time chart of the progress of the cooling operation according to Fig. 6. 3 ... Beverage supply pipe, 10 ... Beverage cooling coil, 11 ...
Water, 13 agitator, 15 agitator drive motor,
16 ... cooler, 17 ... cooling water tank, 19 ... ice sensor, P ...
... Revolution speed control contact.

Claims (1)

(57) [Claims] 1. A cooler for generating an ice layer on a surface, a beverage cooling coil inserted in the middle of a beverage supply pipeline, a cooling water tank containing the cooler and the beverage cooling coil and filled with water, An electric agitator for stirring water in the cooling water tank, an ice sensor installed near the surface of the cooler to detect the formation of an ice layer on the surface of the cooler, and an agitator drive motor for driving the agitator And a rotation control contact of the agitator drive motor for switching a rotation speed of the agitator drive motor by switching a contact based on an ice detection signal of the ice sensor.