Control method for compressor immersion liquid cooling system

Abstract

The application discloses a control method of a compressor immersion liquid cooling system, and is characterized in that the method comprises the following steps: (1) constructing a system; (2) immersing a device with a heat load into liquid coolant in a liquid cooling tank, heat of the device being absorbed by the liquid coolant, and the liquid coolant being evaporated into high-temperature low-pressure gas; (3) the high-temperature low-pressure gas is converted into low-temperature high-pressure liquid by sequentially entering a compressor and a condenser, and is temporarily stored by a liquid storage tank; (4) monitoring a liquid level of the liquid coolant in the liquid storage tank in real time, dynamically controlling opening and closing of an electromagnetic valve according to a comparison result of the liquid level and a preset threshold value, and controlling the liquid storage tank to supplement or stop supplementing the liquid coolant to the liquid cooling tank; and (5) through dynamic adjustment of a supplement amount of the liquid coolant, maintaining the liquid coolant pressure and saturation temperature in the liquid cooling tank in a preset working interval, and realizing adaptive control of a heat dissipation load. The control method can dynamically adjust the liquid coolant circulation and pressure, realize accurate heat dissipation and energy saving, is compatible with multiple types of compressors, and improves system universality.

Description

Technical Field

[0001] This invention relates to compressor cooling technology, and in particular to a control method for a compressor immersion liquid cooling system. Background Technology

[0002] As a core component in industrial refrigeration, compression, and power systems, compressors continuously generate a large amount of heat during operation. If heat dissipation is not timely or the heat dissipation control precision is insufficient, it will lead to decreased compressor efficiency, increased energy consumption, poor operational stability, and even problems such as overheating damage and shortened lifespan.

[0003] Currently, there are immersion liquid cooling solutions for compressors in the industry. These solutions achieve heat dissipation by having the refrigerant directly contact the heat-generating components, offering advantages such as high heat exchange efficiency, compact structure, and low noise. However, existing immersion liquid cooling systems rely on fixed threshold control strategies, which can only adjust the refrigerant flow based on preset temperature or pressure thresholds. They cannot dynamically adjust based on the real-time heat output of the compressor. When the equipment experiences short-term high loads and a surge in heat output, insufficient refrigerant supply can easily lead to temperature and pressure exceeding limits. Conversely, under low-load conditions, refrigerant supply is often excessive, resulting in refrigerant waste, high system energy consumption, and poor overall control accuracy. Furthermore, this type of control logic is tied to the compressor model, making it unsuitable for models with different power ratings and heat dissipation requirements, thus limiting the system's application range. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a control method for a compressor immersion liquid cooling system. This control method can dynamically adjust the refrigerant circulation and pressure to achieve precise heat dissipation and energy saving, while being compatible with multiple compressor models and improving the system's versatility.

[0005] To solve the above technical problems, the following technical solution is adopted: A control method for a compressor immersion liquid cooling system, characterized by comprising the following steps: (1) System construction: The system includes a liquid cooling tank, a compressor, a condenser, a liquid storage tank, a solenoid valve and a control device. The gaseous refrigerant outlet of the liquid cooling tank is connected to the air inlet of the compressor, the air outlet of the compressor is connected to the air inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the liquid storage tank, a liquid level monitoring device is installed in the liquid storage tank, and the liquid outlet of the liquid storage tank is connected to the refrigerant inlet of the liquid cooling tank through a solenoid valve; the signal output terminal of the liquid level monitoring device is electrically connected to the corresponding signal input terminal of the control device, and the corresponding signal output terminal of the control device is electrically connected to the signal input terminal of the solenoid valve. (2) The heat-loaded equipment is immersed in the liquid refrigerant in the liquid cooling tank. The heat of the equipment is absorbed by the liquid refrigerant, and the liquid refrigerant evaporates into a high-temperature, low-pressure gas. (3) After the high temperature and low pressure gas enters the compressor and is compressed into high temperature and high pressure saturated steam, it enters the condenser and is condensed into low temperature and high pressure liquid, and is temporarily stored in the liquid storage tank. (4) Monitor the refrigerant level in the storage tank in real time, and dynamically control the opening and closing of the solenoid valve based on the comparison result between the liquid level and the preset threshold, so as to control the storage tank to replenish or stop replenishing liquid refrigerant to the liquid cooling tank. (5) By dynamically adjusting the amount of refrigerant replenishment, the refrigerant pressure and saturation temperature in the liquid cooling tank are maintained within the preset working range, thereby achieving adaptive control of heat dissipation load.

[0006] During heat generation regulation, the heat-loaded equipment is immersed in liquid refrigerant in the liquid cooling tank. The constant-temperature refrigerant in the tank absorbs the heat generated by the equipment and converts it into high-temperature, low-pressure gas. This gas is then compressed by the compressor and condensed by the condenser, transforming into low-temperature, high-pressure liquid, which is temporarily stored in the storage tank. As the heat generation of the equipment increases, the refrigerant in the tank absorbs more heat, the evaporation rate accelerates, and the amount of gaseous refrigerant generated per unit time increases. The proportion of gaseous refrigerant in the tank rises, leading to an increase in pressure within the tank. The saturation temperature rises along with the saturation pressure. At this point, more low-temperature, high-pressure liquid condenses. When the liquid level in the storage tank is detected to be higher than a preset threshold, the solenoid valve opens, replenishing the tank with low-temperature, high-pressure liquid refrigerant. The replenished liquid refrigerant absorbs heat and evaporates, and the pressure inside the tank is controlled by the balance of liquid refrigerant injection and evaporation, causing the pressure to drop back to the set range, and the saturation temperature also decreases to the target range. When the liquid level in the storage tank is detected to be lower than the preset threshold, the solenoid valve closes, stopping the replenishment of refrigerant to the tank. This liquid cooling system forms a closed-loop control link by setting up a liquid level monitoring device, a control device, and a solenoid valve. It collects liquid level signals in real time and automatically performs refrigerant replenishment. It has a fast response and stable operation, requiring no manual intervention. It can dynamically adjust the refrigerant circulation and pressure to achieve precise heat dissipation and energy saving. Moreover, the overall structure is simple and can be compatible with different models of compressors without complicated modifications, thus improving the system's versatility.

[0007] The control device can be a single-chip microcomputer or a microcomputer controller.

[0008] In the preferred embodiment, in step (4), the liquid level monitoring device monitors the refrigerant level in the storage tank in real time. The preset thresholds include an upper limit and a lower limit. When the liquid level in the storage tank is higher than the upper limit, the solenoid valve opens to replenish the liquid refrigerant to the liquid cooling tank. When the liquid level in the storage tank is lower than the lower limit, the solenoid valve closes to stop replenishing the refrigerant. By setting dual thresholds for the upper and lower limits, the automatic start and stop of the solenoid valve is controlled within a range to avoid excessive, insufficient, or frequent start and stop of refrigerant replenishment. This allows for rapid balancing of the gas-liquid ratio in the liquid cooling tank when the heat output of the equipment fluctuates, ensuring stable pressure and temperature inside the tank.

[0009] In a preferred embodiment, the liquid level monitoring device is a liquid level gauge, which is used to collect refrigerant liquid level data in the storage tank in real time and output signals to the control device.

[0010] In the preferred embodiment, in step (2), the heat-loaded equipment is completely immersed in the liquid refrigerant in the liquid cooling tank. Completely immersing the equipment in the liquid refrigerant maximizes the heat exchange area, improves heat transfer efficiency, quickly removes heat from the equipment, and avoids slow local heat dissipation or local overheating due to contact with high-temperature, low-pressure gas.

[0011] The beneficial effects of this invention are that this control method can dynamically adjust the refrigerant circulation and pressure to achieve precise heat dissipation and energy saving, while being compatible with multiple models of compressors and improving system versatility. Attached Figure Description

[0012] Figure 1 This is a connection block diagram of the compressor immersion liquid cooling system in an embodiment of the present invention. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: A control method for a compressor immersion liquid cooling system, characterized by comprising the following steps: (1) Constructing such Figure 1 The system shown includes a liquid coolant tank 1, a compressor 2, a condenser 3, a liquid storage tank 4, a solenoid valve 5, and a control device (not shown in the figure). The gaseous refrigerant outlet of the liquid coolant tank 1 is connected to the air inlet of the compressor 2, the air outlet of the compressor 2 is connected to the air inlet of the condenser 3, the liquid outlet of the condenser 3 is connected to the liquid inlet of the liquid storage tank 4, the liquid storage tank 4 is equipped with a liquid level monitoring device 401, and the liquid outlet of the liquid storage tank 4 is connected to the refrigerant inlet of the liquid coolant tank 1 through the solenoid valve 5. The signal output terminal of the liquid level monitoring device 401 is electrically connected to the corresponding signal input terminal of the control device, and the corresponding signal output terminal of the control device is electrically connected to the signal input terminal of the solenoid valve 5. (2) The heat-loaded equipment 6 is immersed in the liquid refrigerant in the liquid cooling tank 1. The heat of the equipment 6 is absorbed by the liquid refrigerant, and the liquid refrigerant evaporates into a high-temperature, low-pressure gas. (3) After the high temperature and low pressure gas enters the compressor 2 and is compressed into high temperature and high pressure saturated steam, it enters the condenser 3 and is condensed into low temperature and high pressure liquid, and is temporarily stored in the liquid storage tank 4. (4) The liquid level monitoring device 401 monitors the refrigerant level in the storage tank 4 in real time. The preset thresholds include the upper limit and the lower limit of the liquid level. Based on the comparison between the liquid level and the preset thresholds, the solenoid valve 5 is dynamically controlled to open and close. When the liquid level in the storage tank 4 is higher than the upper limit, the solenoid valve 5 opens to replenish the liquid refrigerant to the liquid cooling tank 1. When the liquid level in the storage tank 4 is lower than the lower limit, the solenoid valve 5 closes to stop replenishing the refrigerant. (5) By dynamically adjusting the amount of refrigerant replenishment, the refrigerant pressure and saturation temperature in the liquid cooling tank 1 are maintained within the preset working range, thereby achieving adaptive control of heat dissipation load.

[0014] During heat generation regulation, the heat-loaded device 6 is immersed in the liquid refrigerant in the liquid cooling tank 1. The constant-temperature refrigerant in the liquid cooling tank 1 absorbs the heat emitted by the device 6 and transforms it into a high-temperature, low-pressure gas. This gas is then compressed by the compressor 2 and condensed by the condenser 3, transforming into a low-temperature, high-pressure liquid, which is temporarily stored in the storage tank 4. When the heat generation of the device 6 increases, the heat absorbed by the refrigerant in the liquid cooling tank 1 increases, the evaporation rate accelerates, and the amount of gaseous refrigerant generated per unit time increases. The proportion of gaseous refrigerant in the liquid cooling tank 1 rises, leading to an increase in pressure within the liquid cooling tank 1. The saturation temperature will increase with the saturation pressure. As the refrigerant levels rise together, the amount of condensed, low-temperature, high-pressure liquid increases. When the liquid level in storage tank 4 exceeds the upper limit, solenoid valve 5 opens, replenishing the liquid cooling tank 1 with low-temperature, high-pressure liquid refrigerant. The replenished liquid refrigerant absorbs heat and evaporates, and the pressure inside the tank is controlled by the injection and evaporation balance of the liquid refrigerant, causing the pressure to drop back to the set range, and the saturation temperature also decreases to the target range. When the liquid level in storage tank 4 falls below the lower limit, solenoid valve 5 closes, stopping the replenishment of refrigerant to liquid cooling tank 1, quickly balancing the gas-liquid ratio inside liquid cooling tank 1, and ensuring stable pressure and temperature inside the tank. This liquid cooling system forms a closed-loop control link by setting up a liquid level monitoring device 401, a control device, and solenoid valve 5. It collects liquid level signals in real time and automatically executes refrigerant replenishment actions, with a fast response and stable operation. It requires no manual intervention, can dynamically adjust refrigerant circulation and pressure, achieve precise heat dissipation and energy saving, and has a simple overall structure that can be compatible with different models of compressor 2 without complex modifications, improving system versatility.

[0015] The control device uses a microcomputer controller.

[0016] The liquid level monitoring device 401 uses a liquid level gauge to collect real-time refrigerant liquid level data in the storage tank 4 and output signals to the control device.

[0017] In step (2), the heat-loaded device 6 is completely immersed in the liquid refrigerant in the liquid cooling tank 1. Completely immersing the device 6 in the liquid refrigerant maximizes the heat exchange area, improves heat transfer efficiency, and quickly removes heat from the device 6, avoiding slow local heat dissipation or local overheating due to contact with high-temperature, low-pressure gas.

Claims

1. A control method for a compressor immersion liquid cooling system, characterized in that... Includes the following steps: (1) System construction: The system includes a liquid cooling tank, a compressor, a condenser, a liquid storage tank, a solenoid valve and a control device. The gaseous refrigerant outlet of the liquid cooling tank is connected to the air inlet of the compressor, the air outlet of the compressor is connected to the air inlet of the condenser, the liquid outlet of the condenser is connected to the liquid inlet of the liquid storage tank, a liquid level monitoring device is installed in the liquid storage tank, and the liquid outlet of the liquid storage tank is connected to the refrigerant inlet of the liquid cooling tank through a solenoid valve; the signal output terminal of the liquid level monitoring device is electrically connected to the corresponding signal input terminal of the control device, and the corresponding signal output terminal of the control device is electrically connected to the signal input terminal of the solenoid valve. (2) The heat-loaded equipment is immersed in the liquid refrigerant in the liquid cooling tank. The heat of the equipment is absorbed by the liquid refrigerant, and the liquid refrigerant evaporates into a high-temperature, low-pressure gas. (3) After the high temperature and low pressure gas enters the compressor and is compressed into high temperature and high pressure saturated steam, it enters the condenser and is condensed into low temperature and high pressure liquid, and is temporarily stored in the liquid storage tank. (4) Monitor the refrigerant level in the storage tank in real time, and dynamically control the opening and closing of the solenoid valve based on the comparison result between the liquid level and the preset threshold, so as to control the storage tank to replenish or stop replenishing liquid refrigerant to the liquid cooling tank. (5) By dynamically adjusting the amount of refrigerant replenishment, the refrigerant pressure and saturation temperature in the liquid cooling tank are maintained within the preset working range, thereby achieving adaptive control of heat dissipation load.

2. The control method for the compressor immersion liquid cooling system as described in claim 1, characterized in that: In step (4), the liquid level monitoring device monitors the refrigerant level in the storage tank in real time; the preset threshold includes an upper limit and a lower limit. When the liquid level in the storage tank is higher than the upper limit, the solenoid valve opens to replenish the liquid refrigerant to the liquid cooling tank; when the liquid level in the storage tank is lower than the lower limit, the solenoid valve closes to stop replenishing the refrigerant.

3. The control method for the compressor immersion liquid cooling system as described in claim 1, characterized in that: The liquid level monitoring device uses a liquid level gauge to collect refrigerant liquid level data in the storage tank in real time and output signals to the control device.

4. The control method for the compressor immersion liquid cooling system as described in claim 1, characterized in that: In step (2), the heat-loaded equipment is completely immersed in the liquid refrigerant in the liquid cooling tank.

Images