TW201807368A - Central cooling system - Google Patents

Abstract

The invention provides a central cooling system, including a control box, a cooling device, a chiller, a chiller tank and a valve assembly. The valve assembly is connected to production lines or equipment by pipeline. The chiller tank is connected to the valve assembly by the pipeline. The chiller is connected to the chiller tank by the pipeline. The cooling device is connected to the chiller and the production lines or the equipment by the pipe. The control box is connected electrically to the production lines or the equipment, the valve assembly, the chiller tank, the chiller and the cooling device. As the control box detects a working temperature of the production lines or the equipment reaching to a predetermined temperature value, the control box may control the valve assembly to deliver the ice water of the chiller tank to the production lines or the equipment, the control box is also driving the chiller to produce and send ice water to the chiller tank, and the control box may control the cooling device to work on the chiller for cooling.

Description

Central cooling system

The present invention relates to a central cooling system, and more particularly to a centrally manufactured ice water system that produces ice water to cool a production line or equipment.

Electroplating technology basically applies a metal plating on the material to impart luster and beauty to the material, rust prevention of the article, prevention of abrasion, and the like.

When the existing electroplating production line is electroplated, the production line 10a of each (column) electroplating equipment will increase the working temperature of the electroplating equipment during the electroplating process after the electroplating solution is entered, so that a refrigerating machine is arranged in each production line 10a. 20a and a cooling water tower 30a perform cooling treatment of the working temperature of the plating apparatus. When the cooling process is performed, the heat source on the line 10a enters the freezer 20a, is cooled by the compressor, and is returned to the production line 10a via the compressor. The water in the cooling tower 30a enters the freezer 20a to cool the compressor, and then returns to the cooling tower 30a for heat dissipation (cooling tower) It can only cool down 3~5 degrees, and the long-term use of water temperature will cause the compressor pressure to increase and the current will increase). In this way, the freezer 20a and the cooling water tower 30a use a minimum current of 60 A/h, and if four production lines 10a, a power consumption of 240 A/h is required. Moreover, the cooling water tower 30a loses 4 tons of water when it is operated 24 hours a day, and a total of 16 tons of water is lost every day in the four production lines 10a. The cooling system of the existing production line 10a is too power and water in use.

Therefore, the main object of the present invention is to solve the problem that the existing production line is too power-consuming and consumes water. The present invention redesigns the cooling system of the production line so that multiple production lines can share a group of central cooling systems to achieve Less power and water.

In order to achieve the above object, the present invention provides a central cooling system in which a pipeline is connected to a production line or equipment, including: a control box, a cooling device, an ice water machine, an ice water tank, and a valve body group. The valve body group is in communication with the line or the apparatus through the line. The ice water tank communicates with the valve body group through the pipeline. The chiller is in communication with the ice water tank through the pipeline. The cooling device is in communication with the chiller and the production line or the apparatus through the conduit. The control box is electrically connected to the production line or the device, the valve body group, the ice water tank, the ice water machine, and the cooling device. Wherein, when the control box detects that the working line or the working temperature of the device reaches the set temperature value, the control box controls the valve body group to send the ice water of the ice water tank to the production line or the device, and the control box also The ice water mechanism ice water is driven into the ice water tank, and the control box controls the cooling device to cool the ice water machine.

In an embodiment of the invention, the control box includes a PLC controller for detecting the water temperature of the production line or the sink of the device, and the water temperature and water level of the ice water tank and the cooling device or Liquid level.

In an embodiment of the present invention, the cooling device includes a cooling water tower, a first cooling water tank, a second cooling water tank, and a water storage tank for storing underground tap water and passing the pipeline with the first The cooling water tank or the second cooling water tank is in communication, and the first cooling water tank and the second cooling water tank are interconnected through the pipeline, and are also in communication with the ice water machine, the cooling water tower and the production line or the equipment.

In an embodiment of the present invention, the cooling device further includes a plurality of liquid level detecting and a temperature sensor, wherein the liquid level detectors are respectively disposed in the cooling water tower, the first cooling water tank, and the second cooling The water tank and the water storage tank are respectively electrically connected to the PLC controller to transmit the detected liquid level signal to the PLC controller, and the PLC controller will drive the external pump to the water storage tank, the first cooling The water tank, the second cooling water tank or the cooling water tower is hydrated.

In an embodiment of the present invention, the cooling water tower communicates with the ice water machine through the pipeline to receive heat from the cooled water of the ice water machine, wherein the temperature sensor and the PLC controller are disposed in the cooling water tower. The sexual connection determines whether the temperature of the cooling water returned by the ice water machine exceeds the set temperature value. When the set temperature value is not exceeded, the cooling tower is cooled by water, and the sensed water temperature exceeds the set temperature value. The PLC controller will start a cooling fan configured by the cooling tower to dissipate heat.

In an embodiment of the invention, the temperature value is 35 degrees or more.

In an embodiment of the present invention, the chiller includes a first chiller and a second chiller, and the first chiller and the second chiller are connected through the pipeline household, and then The ice water tank is connected to the first ice water machine or the second ice water machine, and the water of the ice water tank is made into ice water, and then sent back to the ice water tank, and the cooling water after the ice water water is cooled by the cold water. The device is cooled.

In an embodiment of the present invention, the PLC controller detects a compressor operating power of the first ice water machine or the second ice water machine, and the PLC controls when the first ice water machine runs more than 50% power. The second ice water machine is started; when the operating power of the first ice water machine and the second ice water machine is less than 30%, the PLC controller stops the first ice water machine or the first The second ice machine is running.

In an embodiment of the present invention, the first ice water machine and the second ice water machine are of an unloading type, and the first ice water machine and the second ice water machine respectively have a set of compressors and condensers And the composition of the evaporator.

In an embodiment of the present invention, the ice water tank includes a first ice water tank, a second ice water tank, a temperature detector, and a water level detector. The first ice water tank and the second ice water tank pass through the pipeline household. In addition to communication, the valve body group is connected to the production line or the device.

In an embodiment of the invention, the cooled water of the production line or equipment is returned to the second ice water tank, and the temperature detector is configured by the second ice water tank or the temperature detector disposed inside the first ice water tank. Electrically connecting with the PLC controller, and transmitting the signal detected by the first ice water tank or the second ice water tank to the PLC controller to determine that the temperature of the water does not reach the set value, the PLC controller starts the first ice water machine or The second ice water machine performs ice water production on the first ice water tank or the second ice water tank.

In an embodiment of the present invention, the first ice water tank or the water level detector disposed inside the second ice water tank, the water level detector is electrically connected to the PLC controller to detect the first ice water tank or the first The water level of the second ice water tank is insufficient, and the detection signal is transmitted to the PLC controller, and the PLC controller starts an external pump to replenish the first ice water tank or the second ice water tank.

In an embodiment of the invention, the valve body assembly is disposed on the pipeline in which the ice water tank is in communication with the production line or the apparatus.

In one embodiment of the invention, the valve body set will increase depending on the number of lines or equipment.

In an embodiment of the invention, the valve body assembly includes an electric valve and a motor, and the motor is electrically connected to the PLC controller, and the PLC controller detects the production line or the operation of the device. The operating temperature, and based on the detected temperature, controls the motor to drive the electric valve to release the amount of ice water to achieve the amount of ice water required by the line or equipment.

In an embodiment of the present invention, the PLC controller controls the motor to drive the valve of the electric valve according to the sensed water temperature, and the water temperature of the production line or the device is controlled by 25±0.5° C., and the PLC controller Sensing the temperature difference of the production line or the device to control the opening of the valve to release ice water, the opening amount of the valve at 30 °C at 25.5 °C is 30%, the opening amount of the valve at 26 °C is 40%, or the valve at 27 °C The opening amount is 60%.

In an embodiment of the invention, the production line or the sink of the apparatus is provided with a temperature sensor.

The technical content and detailed description of the present invention are as follows:

Please refer to FIG. 2 and FIG. 3, which are schematic diagrams of the pipeline connection process and the electrical connection control flow of the central cooling system of the present invention. As shown in the figure, the central cooling system of the present invention comprises: a control box 10, a cooling device 20, a chiller 30, an ice water tank 40 and a valve body group 50. The control box 10 detects the temperature generated when the production line 60 or the device 70 is operated, and controls the valve body group 50 to release the ice water in the ice water tank 40 to the production line 60 or the device 70 for cooling operation according to the temperature, and also starts. The chiller 30 produces ice water into the ice water tank 40, while the control box 10 also controls the cooling device 20 to cool the chiller 30 to achieve a circulating cooling effect on the production line 60 or equipment 70.

The control box 10 includes a Programmable Logic Controller (PLC), which is simply referred to as a PLC controller 102 in the present invention. The PLC controller 102 is configured to detect that the operating temperature of the production line 60 or the device 70 (the water temperature of the water tank) reaches a set temperature value to control the flow of ice water from the valve body group 50 to release the ice water tank 40 to the production line 60 or the device 70 for cooling. At the same time, the PLC controller 102 controls the chiller 30 to operate synchronously by one or two units according to the amount of released ice water. When the PLC controller 102 detects that the water level of the cooling device 20 and the ice water tank 40 is insufficient, the PLC controller 102 controls the external pump (not shown) to replenish the cooling device 20 and the ice water tank 40. Further, when the PLC controller 102 detects that the water temperature of the cooling tower 202 of the cooling device 20 exceeds the setting, the PLC controller 102 drives the cooling fan 214 of the cooling water tower 202 to dissipate heat.

The cooling device 20 includes a cooling water tower 202, a first cooling water tank 204, a second cooling water tank 206, a water storage tank 208, a plurality of liquid level detections 210, and a temperature sensor 212. The water storage tank 208 is configured to store underground tap water (because the groundwater temperature is low), and communicate with the first cooling water tank 204 or the second cooling water tank 206 through the pipeline, and the first cooling water tank 204 and the second cooling water tank 206 pass through The pipeline interconnect is also connected to the production line 60, the chiller 30, and the cooling tower 202, and the cooling water of the first cooling water tank 204 or the second cooling water tank 206 is supplied to the production line 60 or the equipment 70 for cleaning water. The liquid level detectors 210 are respectively disposed in the cooling water tower 202, the first cooling water tank 204, the second cooling water tank 206, and the water storage tank 208, and are electrically connected to the PLC controller 102, respectively. The detected liquid level signal is transmitted to the PLC controller 102, which will drive the external pump to replenish the water storage tank 208, and also replenish the water of the water storage tank 208 to the first cooling water tank 204 or In the second cooling water tank 206, the first cooling water tank 204 or the second cooling water tank 206 is replenished with water in the cooling water tower 202. The cooling water tower 202 communicates with the ice water machine 30 through a pipeline to receive heat from the cooled water of the ice water machine 30, and a temperature sensor 212 is disposed in the cooling water tower 202 to electrically connect with the PLC controller 102. The temperature signal of the cooling water that senses the backflow of the ice water machine 30 is transmitted to the PLC controller 102 to determine whether the temperature value is exceeded. If the set temperature value is not exceeded, the cooling water tower 202 is cooled by water, and if the water temperature is sensed. Above the set temperature value, the PLC controller 102 will activate the cooling fan 214 disposed on the cooling water tower 202 to dissipate heat. In the figure, the temperature value is 35 degrees or more.

The chiller 30 includes a first chiller 302 and a second chiller 304. The first ice water machine 302 and the second ice water machine 304 communicate with the ice water tank 40 and the first cooling water tank 204 or the second cooling water tank 206 in addition to the pipeline. The first ice water machine 302 and the second ice water machine 304 respectively have a set of a compressor, a condenser and an evaporator. When the ice water is manufactured, the first ice water machine 302 or the second ice water machine 304 makes the water of the ice water tank 40 into ice water, and then returns it to the ice water tank 40, and the cooling water is cooled by the cold device 20. The first cooling water tank 204 is sent to the first ice water machine 302 and the second ice water machine 304 for cooling, and the cooled water is returned to the cooling water tower 202 for cooling. When the ice water is manufactured, the PLC controller 102 of the control box 10 controls the compressor operation, because the first ice water machine 302 and the second ice water machine 304 are of an unloading type, so the PLC controller 102 simultaneously detects The compressor operating power of the first ice water machine 302 or the second ice water machine 304 is measured. When the single first ice water machine 302 runs more than 50% of power, the PLC controller 102 activates the second ice water machine. 304. When the two operating powers of the first ice water machine 302 and the second ice water machine 304 are less than 30%, the PLC controller 102 stops one.

The ice water tank 40 includes a first ice water tank 402, a second ice water tank 404, a temperature detector 406, and a water level detector 408. The first ice water tank 402 and the second ice water tank 404 are in communication with the production line 60 and the equipment 70 in addition to the pipeline. Under the control of the PLC controller 102 of the control box 10, the ice water of the first ice water tank 402 is sent to the production line 60 or the water tank of the device 70, and the heat source generated by the production line 60 or the device 70 is operated. The cooling process allows the line 60 or the apparatus 70 to function properly. The water cooled by the production line 60 or the device 70 is returned to the second ice water tank 404. Since the temperature detector 406 is disposed inside the second ice water tank 404 or the first ice water tank 402, the temperature detector 406 and the control The PLC controller 102 of the box 10 is electrically connected, and the water temperature signal detected by the first ice water tank 402 or the second ice water tank 404 is transmitted to the PLC controller 102 of the control box 10 to determine that the water ice has not reached the set value. At this time, the PLC controller 102 activates the first ice water machine 302 or the second ice water machine 304 to perform ice water production on the first ice water tank 402 or the second ice water tank 404. A water level detector 408 is disposed inside the first ice water tank 402 or the second ice water tank 404, and the water level detector 408 is electrically connected to the PLC controller 102 to detect the first ice water tank 402 or the second ice. The water level of the water tank 404 is insufficient, and the detection signal is transmitted to the PLC controller 102, and the external pump is activated by the PLC controller 102 to replenish the first ice water tank 402 or the second ice water tank 404.

The valve body group 50 is disposed on a pipeline that the first ice water tank 402 communicates with the production line 60 or the device 70. The valve body set 50 will increase depending on the number of production lines 60 or devices 70. The valve body assembly 50 includes an electric valve and a motor. The motor is electrically coupled to the PLC controller 102 of the control box 10. The PLC controller 102 detects the temperature generated by the operation of the production line 60 or the device 70, and controls the motor to drive the electric valve to release the amount of ice water according to the detected temperature to reach each production line 60 or device 70. The amount of ice water needed.

When the central cooling system of the present invention is in operation, the PLC controller 102 of the control box 10 detects the temperature of the water sensed by the temperature sensor 80 placed in the water line of the production line 60 or the device 70. The PLC controller 102 According to the sensed water temperature, the valve of the motor-driven electric valve is opened. If the water temperature of the production line 60 or the device 70 is controlled by 25±0.5°C, the PLC controller 102 controls according to the sensed temperature difference between the production line 60 or the device 70. The size of the valve is open to release ice water. For example, the opening of the valve at 30 °C is 30%, the opening of the valve at 40 °C is 40%, or the opening of the valve at 27 °C is 60%.

After the valve of the electric valve is opened, the ice water of the first ice water tank 402 of the ice water tank 40 flows onto the production line 60 or the device 70, and the PLC controller 102 controls the ice water machine 30 according to the amount of released ice water. One of the first ice water machines 302 or the two first ice water machines 302 and the second ice water machine 304 operate in synchronization. The water cooled by the production line 60 or the equipment 70 will be returned to the second ice water tank 404, and the detected temperature signal will be detected by the second ice water tank 404 or the temperature detector 406 of the first ice water tank 402. When the PLC controller 102 transmitted to the control box 10 determines that the ice of the water has not reached the set value, the PLC controller 102 activates the first ice water machine 302 or the second ice water machine 304 to the first ice water tank 402. Or the second ice water tank 404 performs ice water production.

When the ice water is manufactured, the PLC controller 102 of the control box 10 simultaneously detects the compressor operating power of the first ice water machine 302 or the second ice water machine 304, when the single first ice water machine 302 runs more than At 50% power, the PLC controller 102 activates the second ice water machine 304. When the operating power of the first ice water machine 302 or the second ice water machine 304 is less than 30%, the PLC controller 102 stops. Drop one.

During the process of making the ice water, when the water cooled by the chiller 30 is returned to the cooling water tower 202, the temperature sensor 212 senses the temperature signal of the cooling water and transmits it to the PLC controller 102 to determine whether the temperature exceeds the set temperature value by 35 ° C. If the set temperature value is not more than 35 ° C, the cooling water tower 202 is cooled by water at a normal temperature, and if the sensed water temperature exceeds the set temperature value of 35 ° C, the PLC controller 102 will start the cooling water tower 202. The disposed cooling fan 214 performs heat dissipation.

The water level detector 408 of the first ice water tank 402 or the second ice water tank 404 detects that the water level of the first ice water tank 402 or the second ice water tank 404 is insufficient, and transmits a detection signal to the PLC controller 102. The PLC controller 102 activates an external pump to replenish the first ice water tank 402 or the second ice water tank 404.

When the PLC controller 102 detects the liquid level shortage signal detected by the liquid level detectors 210 of the cooling water tower 202, the first cooling water tank 204, the second cooling water tank 206, and the water storage tank 208, the PLC control The device 102 will drive the external pump to replenish the water storage tank 208, and the water in the water storage tank 208 will also be replenished to the first cooling water tank 204 or the second cooling water tank 206 or the cooling water tower 202.

The production line 60 and the equipment 70 are heat treated by circulating ice water to ensure the operation of the production line 60 or the equipment 70.

In order to further understand the characteristics of the new technology of the present invention, the following is explained:

1. The central cooling system of the present invention uses two ice water machines and one cooling water tower, and is matched with a circulating pump (not shown) and a flow valve (valve body group) to provide four production lines and four. The rectifier equipment is cooled, and its current consumption is up to 170A/h (average current consumption is 140A/h). At least 30% of the electricity can be saved compared with the previous one. The cooling tower will lose 12 tons of water when it is operated 24 hours a day. At least 4 tons compared with the previous one (because the temperature of the return cooling water of the present invention must exceed 35 degrees, the cooling fan will start to reduce water loss).

2. Since the underground tap water tank supplies lower temperature water to the cooling water tank and cools the ice water machine (ensure that the compressor pressure is normal, it will not cause high voltage and high current to save electricity), and the water after cooling and cooling is supplied to the on-site production line or equipment for cleaning. Make sure that the ice water machine has a low temperature tap water at any time.

3, two ice water machines use variable frequency equipment, the workload of the two divisions controlled by the PLC controller does not cause a full-time work to rest.

4. The ice water is installed in the production line and equipment to install the flow valve (valve body group). The PLC controller controls the ice water flow to prevent the ice water temperature from changing too much, causing the chiller to restart repeatedly and waste electricity.

5, the circulating pump is also controlled by the PLC controller according to the flow rate, depending on the flow demand, it is decided that several pumps of 1~3 pumps should be started.

However, the above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalents thereof are all included in the scope of the present invention. Within the scope of protection, it is given to Chen Ming.

10‧‧‧Control box

102‧‧‧PLC controller

20‧‧‧Cooling device

202‧‧‧Cooling tower

204‧‧‧First cooling sink

206‧‧‧Second cooling sink

208‧‧‧storage tank

210‧‧‧Level detection

212‧‧‧Temperature sensor

214‧‧‧ cooling fan

30‧‧‧ice water machine

302‧‧‧First ice water machine

304‧‧‧Second ice water machine

40‧‧‧ ice sink

402‧‧‧First ice sink

404‧‧‧Second ice sink

406‧‧‧ Temperature detector

408‧‧‧Water level detector

50‧‧‧ valve body group

60‧‧‧Production line

70‧‧‧ Equipment

80‧‧‧temperature sensor

Figure 1, is a schematic diagram of a cooling system configuration of a conventional electroplating equipment production line;

2 is a schematic diagram of a pipeline connection process of the central cooling system of the present invention;

Figure 3 is a schematic diagram showing the electrical connection control flow of the central cooling system of the present invention.

Claims (17)

A central cooling system in which a pipeline is connected to a production line or equipment, comprising: a valve body group that communicates with the production line or the apparatus through the pipeline; an ice water tank that communicates with the valve body group through the pipeline An ice water machine is connected to the ice water tank through the pipeline; a cooling device is connected to the ice water machine and the production line or the device through the pipeline; a control box is connected to the production line or the equipment The valve body group, the ice water tank, the ice water machine and the cooling device are electrically connected; wherein, when the control box detects that the working line or the working temperature of the device reaches a set temperature value, the control box control valve The body group sends the ice water of the ice water tank to the production line or the equipment, and the control box also drives the ice water mechanism ice water into the ice water tank, and the control box controls the cooling device to cool the ice water machine. The central cooling system of claim 1, wherein the control box includes a PLC controller for detecting a water temperature of the production line or a sink of the device, and the ice sink and the The water temperature and water level or level of the cooling unit. The central cooling system of claim 2, wherein the cooling device comprises a cooling water tower, a first cooling water tank, a second cooling water tank and a water storage tank for storing underground tap water and transmitting The pipeline is connected to the first cooling water tank or the second cooling water tank, and the first cooling water tank and the second cooling water tank are interconnected through the pipeline, and the ice water machine, the cooling water tower and the production line Or the device is connected. The central cooling system of claim 3, wherein the cooling device further comprises a plurality of liquid level detecting and a temperature sensor, wherein the liquid level detectors are respectively disposed on the cooling water tower, the first Cooling the water tank, the second cooling water tank and the water storage tank, and electrically connecting to the PLC controller respectively, to transmit the detected liquid level signal to the PLC controller, the PLC controller will drive the external pump Water is supplied to the water storage tank, the first cooling water tank, the second cooling water tank, or the cooling water tower. The central cooling system of claim 4, wherein the cooling water tower communicates with the ice water machine through the pipeline to receive heat from the cooled water of the ice water machine, wherein the temperature is arranged in the cooling water tower. The inductor is electrically connected to the PLC controller to sense the temperature of the cooling water returned by the ice water machine and determine whether the temperature exceeds the set temperature value. When the set temperature value is not exceeded, the cooling tower is cooled by water. When the water temperature exceeds the set temperature value, the PLC controller will start a cooling fan configured by the cooling tower to dissipate heat. The central cooling system of claim 5, wherein the temperature value is 35 degrees or more. The central cooling system of claim 2, wherein the chiller comprises a first chiller and a second chiller, the first chiller and the second chiller The roadway is connected to the ice water tank, and the first ice water machine or the second ice water machine makes the water of the ice water tank into ice water, and then returns it to the ice water tank, the ice water mechanism ice water The cooled water is cooled by the cold device. The central cooling system of claim 7, wherein the PLC controller detects a compressor operating power of the first ice water machine or the second ice water machine, and the first ice water machine operates more than 50 When the power is %, the PLC controller starts the second ice water machine; when the operating power of the first ice water machine and the second ice water machine is less than 30%, the PLC controller stops the first An ice water machine or the second ice water machine operates. The central cooling system of claim 8, wherein the first ice water machine and the second ice water machine are of an unloading type, and the first ice water machine and the second ice water machine respectively have one inside The group consists of a compressor, a condenser and an evaporator. The central cooling system of claim 2, wherein the ice water tank comprises a first ice water tank, a second ice water tank, a temperature detector and a water level detector, the first ice water tank and the first The second ice water tank is connected to the pipeline through the pipeline household, and then communicates with the production line or the equipment through the valve body group. The central cooling system of claim 10, wherein the cooled water of the production line or equipment is returned to the second ice water tank due to the temperature of each of the second ice water tank or the first ice water tank. a detector, the temperature detector is electrically connected to the PLC controller, and the PLC controller starts when the signal detected by the first ice water tank or the second ice water tank is transmitted to the PLC controller to determine that the water temperature does not reach the set value. The first ice water machine or the second ice water machine performs ice water production on the first ice water tank or the second ice water tank. The central cooling system of claim 11, wherein the first ice water tank or the water level detector disposed inside the second ice water tank is electrically connected to the PLC controller to detect the water level detector. The water level of the first ice water tank or the second ice water tank is insufficient, and a detection signal is transmitted to the PLC controller, and the PLC controller starts an external pump to replenish the first ice water tank or the second ice water tank. The central cooling system of claim 2, wherein the valve body assembly is disposed on the pipeline in which the ice water tank is in communication with the production line or the apparatus. The central cooling system of claim 13, wherein the valve body group is increased according to the number of the production line or the equipment. The central cooling system of claim 13, wherein the valve body group includes an electric valve and a motor, the motor is electrically connected to the PLC controller, and the PLC controller detects the production line or the The operating temperature generated by the operation of the device, and controlling the motor to drive the electric valve to release the amount of ice water according to the detected temperature to achieve the amount of ice water required by the production line or the device. The central cooling system of claim 15, wherein the PLC controller controls the motor to drive the valve of the electric valve to be opened according to the sensed water temperature, and the water temperature of the production line or the device is controlled by 25±0.5°. C, the PLC controller will control the opening of the valve according to the temperature difference of the induction line or the device to release the ice water. The opening amount of the valve is 30% at 25.5 °C, and the opening amount of the valve is 40% at 26 °C. Or the opening of the valve at 60 ° C is 60%. The central cooling system of claim 2, wherein the production line or the water tank of the apparatus is provided with a temperature sensor.