CN-121993996-A - High-precision temperature control method for temperature control laser water chiller and water chiller

CN121993996ACN 121993996 ACN121993996 ACN 121993996ACN-121993996-A

Abstract

The invention discloses a high-precision temperature control laser water chiller temperature control method and a water chiller. The problems that an existing high-precision laser water chiller is complex in structure and control strategy are solved. The method comprises the steps of obtaining the outlet water temperature of the water tank of the evaporator in real time, calculating a first temperature difference between the target temperature and the outlet water temperature, adjusting the time for alternately opening and closing the first electromagnetic valve and the second electromagnetic valve according to the first temperature difference when the first temperature difference is not larger than a temperature difference threshold value, and repeating the step S1 and the step S2 until the outlet water temperature reaches the target temperature. According to the invention, the low-temperature circulation loop and the high-temperature circulation loop are arranged, and the alternating opening time of the low-temperature circulation loop and the high-temperature circulation loop is regulated in real time according to the temperature difference of dynamic change to control the temperature of the laser water chiller, so that the temperature control precision of the laser water chiller is improved, and meanwhile, the temperature stability of the laser water chiller is maintained.

Inventors

ZHANG FUYU
GONG YONGYONG
ZHENG DONGYU
DENG HONGBO
LU ZHIYUAN

Assignees

浙江先导热电科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (10)

1. The high-precision temperature control laser water chiller temperature control method is characterized in that the water chiller comprises a low-temperature circulation loop, a high-temperature circulation loop and a heat exchange loop, wherein the low-temperature circulation loop is formed by surrounding an evaporator water tank, a first electromagnetic valve is arranged on the low-temperature circulation loop, a second electromagnetic valve is arranged on the low-temperature circulation loop, and the method comprises the following steps: S1, acquiring evaporation in real time the outlet water temperature of the water tank; S2, calculating a first temperature difference between the target temperature and the outlet water temperature, and adjusting the time for alternately opening and closing the first electromagnetic valve and the second electromagnetic valve according to the first temperature difference when the first temperature difference is not greater than a temperature difference threshold value; s3, repeating the step S1 and the step S2 until the temperature of the effluent reaches the target temperature.
2. The method for controlling the temperature of the high-precision temperature-control laser water chiller according to claim 1, wherein the method comprises the following steps: And when the first temperature difference is larger than the temperature difference threshold value, starting a continuous refrigeration state or a continuous heating state until the first temperature difference reaches the temperature difference threshold value.
3. The method for controlling the temperature of a high-precision temperature-controlled laser chiller according to claim 2, wherein the adjusting the time for alternately opening and closing the first solenoid valve and the second solenoid valve according to the first temperature difference comprises: Setting the total time for alternately opening the first electromagnetic valve and the second electromagnetic valve, wherein for the first temperature difference, the opening time of the first electromagnetic valve/the second electromagnetic valve is longer than the opening total time of the second electromagnetic valve/the first electromagnetic valve in the second set proportion every time the temperature difference threshold value of the first set proportion is included, so that the opening time of the first electromagnetic valve and the opening time of the second electromagnetic valve are calculated.
4. A method of controlling the temperature of a high-precision temperature-controlled laser chiller according to claim 1,2 or 3 wherein the chiller comprises an electric heater disposed in the evaporator water tank, the method further comprising: when the temperature of the outlet water is lower than the target temperature and the first temperature difference is greater than the temperature difference threshold value, starting the continuous heating state, and starting the electric heater to heat.
5. A high-precision temperature control laser water chiller implementing the control method of any one of claims 1-4 is characterized by comprising an evaporator water tank, wherein a low-temperature circulation loop and a high-temperature circulation loop are respectively connected between an air inlet and an air outlet of the evaporator water tank, a first electromagnetic valve and a second electromagnetic valve for switching the two circulation loops are respectively arranged on the low-temperature circulation loop and the high-temperature circulation loop, and a heat exchange loop is connected between a water inlet and a water outlet of the evaporator water tank.
6. The high-precision temperature-control laser water chiller according to claim 5 wherein the low-temperature circulation loop comprises a compressor and a condenser, wherein the compressor outlet is connected to the condenser inlet, the condenser outlet is connected to the evaporator water tank air inlet after capillary tube by connecting to the first solenoid valve, and the evaporator water tank air outlet is connected to the compressor inlet.
7. The high-precision temperature-control laser water chiller according to claim 5 wherein the high-temperature circulation loop comprises a compressor, the compressor outlet being connected to the evaporator water tank air inlet by connecting to the second solenoid valve, the evaporator water tank air outlet being connected to the compressor inlet.
8. The high-precision temperature control laser water chiller according to claim 5 wherein the heat exchange circuit comprises a water pump and heat exchange equipment, wherein the outlet of the heat exchange equipment is connected with the water inlet of the evaporator water tank, the water outlet of the evaporator water tank is connected with the water pump inlet, and the water pump outlet is connected with the heat exchange equipment inlet.
9. A high-precision temperature-controlled laser water chiller according to claim 5 or 6 or 7 or 8 wherein an electric heater is disposed in the evaporator water tank.
10. The high-precision temperature-control laser water chiller according to claim 6 wherein a dry filter is disposed between the condenser outlet and the capillary tube.

Description

High-precision temperature control method for temperature control laser water chiller and water chiller Technical Field The invention relates to the technical field of water coolers, in particular to a high-precision temperature control laser water cooler temperature control method and a water cooler. Background Since the core components of the laser device are extremely sensitive to temperature, temperature fluctuation can lead to unstable laser output power, reduced beam quality and even damage to the device, and therefore, a high-precision laser water chiller must be used. The price of the existing high-precision laser water chiller in the market is far higher than that of a common industrial water chiller or an air cooling heat dissipation system, the price of one high-precision laser water chiller can be several times or even tens times that of common cooling equipment, and meanwhile, the volume and the weight of the high-precision laser water chiller are usually much larger than those of a common cooling device due to the adoption of a more complex refrigerating system, a larger heat exchanger and a water storage tank. At present, there is also an improvement scheme of the water chiller, such as the Chinese patent with publication number CN119802979A, which relates to a control method of the water chiller, and the patent adopts a method of adjusting the heat exchange quantity of the heat exchange loop by two loops, so as to improve the temperature control precision of the laser water chiller, and simultaneously, the cost of the water chiller is reduced by utilizing a capillary tube and an electromagnetic valve. However, the patent has a complicated structure, and the heat exchange control strategy is complicated, so that the patent has a further simplified space. Disclosure of Invention The invention mainly solves the problems of complex structure and control strategy of the existing high-precision laser water chiller, and provides a high-precision temperature control method for the laser water chiller and the water chiller. The technical problem is mainly solved by the following technical scheme that the high-precision temperature control laser water chiller temperature control method comprises a low-temperature circulation loop, a high-temperature circulation loop and a heat exchange loop, wherein the low-temperature circulation loop is formed by surrounding an evaporator water tank, a first electromagnetic valve is arranged on the low-temperature circulation loop, a second electromagnetic valve is arranged on the low-temperature circulation loop, and the method comprises the following steps of: S1, acquiring evaporation in real time the outlet water temperature of the water tank; S2, calculating a first temperature difference between the target temperature and the outlet water temperature, and adjusting the time for alternately opening and closing the first electromagnetic valve and the second electromagnetic valve according to the first temperature difference when the first temperature difference is not greater than a temperature difference threshold value; s3, repeating the step S1 and the step S2 until the temperature of the effluent reaches the target temperature. According to the invention, the low-temperature circulation loop and the high-temperature circulation loop are arranged, and the alternating opening time of the low-temperature circulation loop and the high-temperature circulation loop is regulated in real time according to the temperature difference of dynamic change to control the temperature of the laser water chiller, so that the temperature control precision of the laser water chiller is improved, and meanwhile, the temperature stability of the laser water chiller is maintained. Based on the temperature control method, the temperature control precision of the water chiller is ensured to be +/-0.1 ℃. The laser water chiller is used for controlling the temperature of target equipment, wherein the low-temperature circulation loop is used for outputting low-temperature refrigerant, the high-temperature circulation loop is used for outputting high-temperature refrigerant, the refrigerant enters a copper pipe of the evaporator water tank, heat exchange is carried out on water in the evaporator water tank, and the heat exchange loop is used for outputting water in the evaporator water tank to control the temperature of the target equipment. The communication time of the low-temperature circulation loop and the high-temperature circulation loop is controlled by changing the alternating opening and closing time of electromagnetic valves in the low-temperature circulation loop and the high-temperature circulation loop, and the low-temperature refrigerant and the high-temperature refrigerant alternately enter copper tubes of the evaporator water tank so as to control the temperature in the evaporator water tank. The target temperature is a temperature for maintaining target equipment to wor