A large-load constant-temperature liquid supply cooling device and a temperature control method

Abstract

The application discloses a kind of big load constant temperature liquid supply cooling device and temperature control method, including cold storage, temperature control, liquid supply three big units, cold storage, temperature control, liquid supply three form multiple circulation loops, independent and synergistic each other.Supply liquid unit in cooling liquid absorption load heat, with low-temperature liquid in cold storage unit in heat exchanger of temperature control unit heat exchange, according to the feedback of temperature sensor, flow sensor, through the frequency conversion of temperature control circulating pump in temperature control unit and the opening degree adjustment function of electric two-way regulating valve and electric three-way regulating valve, the flow of cold and hot fluid into heat exchanger is automatically adjusted, so that the temperature of cooling liquid in buffer tank is maintained in the supply liquid temperature range, then the effect of continuously cooling and cooling for heat load can be achieved.The application proposes a new temperature control strategy and designs a constant temperature liquid supply device, which solves the problems of unstable temperature control and insufficient liquid supply in the cooling process of existing liquid cooling system for large load equipment, and has great practical value.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling systems, and more specifically to a high-load constant-temperature liquid supply cooling device and temperature control method. Background Technology

[0002] With the dramatic increase in the size and power of electronic devices, the spatial integration of components is becoming increasingly complex, and their heat flux density is also constantly increasing. Consequently, the need for heat dissipation for these components and devices that generate heat for extended periods is becoming increasingly urgent. Traditional natural cooling or forced air cooling methods are only effective for devices with low heat flux density or a small number of heat sources. For large-load devices with a large number of heat sources that are widely dispersed, air cooling methods often fail to meet the desired heat dissipation requirements. In contrast, liquid circulation cooling technology, due to its advantages such as high heat transfer coefficient, stable operation, and low noise, is gradually becoming the first choice for cooling large-load, integrated electronic devices.

[0003] Liquid circulation cooling technology continuously provides a coolant at a certain temperature, flow rate, and pressure to the heat load, continuously cooling the localized areas of the heat load and creating a stable and favorable working environment for the entire integrated system, enabling it to operate continuously. The core of this technology lies in the coordination and control between cold storage, temperature control, and coolant supply to achieve the most efficient heat dissipation. Summary of the Invention

[0004] To overcome the shortcomings of traditional air cooling in terms of insufficient heat dissipation capacity for equipment with multiple heat sources and high heat flux density, and to address the issue that existing conventional liquid cooling systems often have unstable temperature control for large-load equipment, this invention provides a new temperature control strategy and a constant-temperature liquid supply device design that can meet the cooling requirements of continuous constant-temperature liquid supply for large-load equipment.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A high-load constant-temperature liquid supply cooling device includes a cold storage unit, a temperature control unit, and a liquid supply unit that are independent yet work together.

[0007] The cold storage unit A includes a refrigeration unit, a cold storage water tank, and a cold storage circulation pump, which are connected by pipelines to form a circulation loop.

[0008] The temperature control unit includes a heat exchanger, a buffer water tank, a second electric two-way regulating valve, a temperature control circulating pump, and an electric three-way regulating valve.

[0009] The liquid supply unit includes a buffer tank, a load, a first electric two-way regulating valve, and an electric three-way regulating valve.

[0010] Several temperature sensors are installed on the pipelines of the temperature control unit and the liquid supply unit, and a flow sensor is installed on the pipeline of the temperature control unit.

[0011] The high-load constant-temperature cooling device uses a heat exchanger as a link. Based on the feedback from temperature and flow sensors in the supply and return pipelines, it adjusts the frequency of the temperature control circulation pump and the opening of the second electric two-way regulating valve and electric three-way regulating valve in the temperature control unit. This, in turn, regulates the flow rate of the cold and hot fluids entering the heat exchanger for heat exchange, ultimately maintaining the liquid in the buffer tank within the set temperature range to achieve good temperature control. Consequently, it can provide a continuous and reliable constant-temperature coolant to the load equipment.

[0012] As a preferred embodiment of the above scheme, the temperature control unit forms two sets of circulation loops with the heat exchanger as the core;

[0013] The cold water storage tank, heat exchanger, second electric two-way regulating valve, and temperature-controlled circulating pump are connected by pipelines to form a circulation loop;

[0014] The heat exchanger, buffer tank, electric three-way regulating valve, and flow sensor are connected by pipelines to form another circuit.

[0015] As a preferred embodiment of the above scheme, the liquid supply unit further includes a standby small pump, an electric heater, a first liquid supply pump, and a second liquid supply pump; a buffer tank, a standby small pump, a load, an electric heater, a first electric two-way regulating valve, a first liquid supply pump, a second liquid supply pump, an electric three-way regulating valve, and a flow sensor are connected by pipelines to form a circulation loop.

[0016] As a preferred embodiment of the above scheme, the standby pump, the first liquid supply pump, the second liquid supply pump, and the temperature-controlled circulation pump are all variable frequency pumps.

[0017] As a preferred embodiment of the above scheme, the cold storage unit, temperature control unit, and liquid supply unit all include multiple sets of throttling devices.

[0018] As a preferred embodiment of the above scheme, both the cold water storage tank and the buffer water tank are equipped with temperature sensors and level gauges.

[0019] As a preferred embodiment of the above scheme, the first electric two-way regulating valve, the electric three-way regulating valve, and the second electric two-way regulating valve are all proportional regulating electric valves.

[0020] As a preferred option, pressure gauges are installed on the liquid supply lines of the cold storage unit A, temperature control unit B, and liquid supply unit C.

[0021] A temperature control method for a high-load constant-temperature liquid supply cooling device includes the following steps:

[0022] Step 1: The refrigeration unit in the cold storage unit maintains the liquid in the cold storage tank at a stable low temperature. Its temperature is set and adjusted automatically. The cold storage tank is equipped with a temperature sensor and a level gauge. The system calculates the stored cold energy through temperature and level.

[0023] Step 2: The buffer tank in the liquid supply unit provides coolant with a constant temperature and variable flow rate to the load; wherein: for heat loads with low heat flux density, low flow rate liquid supply is achieved by relying on the standby small pump and the first electric two-way regulating valve to bypass and regulate; for heat loads with high heat flux density, the start / stop and frequency of the first liquid supply pump and the second liquid supply pump are automatically determined by comparing the set flow rate and the total return flow rate.

[0024] Step 3: Based on the feedback from the temperature sensor, level gauge, flow sensor, and fifth temperature sensor in the buffer tank, control the opening of the electric three-way regulating valve to regulate the flow rate into the heat exchanger at the hot end. Specifically, the coolant after load cooling is split via the electric three-way regulating valve: one path flows directly back to the buffer tank, while the other path exchanges heat with the low-temperature liquid in the heat exchanger before flowing back to the buffer tank.

[0025] Step 4: The low-temperature liquid in the cold water tank of the temperature control unit enters the heat exchanger through the frequency conversion regulation of the temperature control circulation pump, and the flow rate is further regulated by the second electric two-way regulating valve, and then heat is exchanged with the return liquid in the liquid supply unit C.

[0026] Step 5: The electric three-way regulating valve in the temperature control unit adjusts the flow rate of the return liquid into the heat exchanger based on the feedback from the temperature sensor and flow sensor on the pipeline, so as to exchange heat with the low-temperature liquid in the cold storage unit and thus maintain the stable temperature of the coolant in the buffer tank.

[0027] Step 6: The electric heating system performs thermal compensation on the return liquid based on the feedback from the temperature sensor in the buffer tank and the third temperature sensor on the pipeline, further ensuring the stability of the coolant temperature in the buffer tank.

[0028] Step 7: Multiple circulation loops are formed in the cold storage unit, temperature control unit, and liquid supply unit.

[0029] Due to the above structure, the beneficial effects of the present invention are as follows:

[0030] (1) This invention solves the shortcomings of existing liquid cooling systems, such as unstable temperature control and insufficient liquid supply flow during the cooling of large-load equipment, by proposing a new temperature control strategy and designing a constant temperature liquid supply device. It has great practical value.

[0031] (2) The two-stage water tanks coordinate cold storage and cold supply, resulting in good temperature control;

[0032] (3) Suitable for large load equipment with high heat flux density and large flow cooling requirements;

[0033] (4) The constant temperature liquid supply is stable and reliable, and the operation is simple. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Among them, A-cold storage unit; B-temperature control unit; C-liquid supply unit; 1-refrigeration unit; 2-first throttling device; 3-cold storage water tank; 4-second throttling device; 5-third throttling device; 6-first temperature sensor; 7-heat exchanger; 8-second temperature sensor; 9-buffer water tank; 10-third throttling device; 11-fourth throttling device; 12-standby pump; 13-fifth throttling device; 14-third temperature sensor; 15-load; 16-fourth temperature sensor; 16-electrical... Heating, 17-First electric two-way regulating valve, 18-First liquid supply pump, 19-Second liquid supply pump, 20-Sixth throttling device, 21-Electric three-way regulating valve, 22-Seventh throttling device, 23-Flow sensor, 24-Fifth temperature sensor, 25-Sixth temperature sensor, 26-Second electric two-way regulating valve, 27-Eighth throttling device, 28-Temperature-controlled circulating pump, 29-Ninth throttling device, 30-Tenth throttling device, 31-Eleventh throttling device, 32-Cold storage circulating pump. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, this embodiment provides a high-load constant-temperature liquid supply cooling device, including a cold storage unit A, a temperature control unit B, and a liquid supply unit C that are independent of each other but work together.

[0039] in:

[0040] The cold storage unit A includes a refrigeration unit 1, a first throttling device 2, a cold storage water tank 3, an eleventh throttling device 31, a cold storage circulation pump 32, and a pressure gauge on the pipeline, forming a circulation loop;

[0041] The core of temperature control unit B is heat exchanger 7. Cold water tank 3, second throttling device 4, third throttling device 5, first temperature sensor 6, heat exchanger 7, sixth temperature sensor 25, electric two-way regulating valve 26, eighth throttling device 27, temperature control circulating pump 28, ninth throttling device 29, and tenth throttling device 30 are connected by pipelines to form a circulation loop. Heat exchanger 7, second temperature sensor 8, buffer water tank 9, electric three-way regulating valve 21, seventh throttling device 22, flow sensor 23, and fifth temperature sensor 24 are connected by pipelines to form a loop.

[0042] The liquid supply unit C consists of a buffer water tank 9, a third throttling device 10, a fourth throttling device 11, a standby small pump 12, a fifth throttling device 13, a third temperature sensor 14, a load 15, a fourth temperature sensor 16, an electric heater 16, a first electric two-way regulating valve 17, a first liquid supply pump 18, a second liquid supply pump 19, a sixth throttling device 20, an electric three-way regulating valve 21, a seventh throttling device 22, and a fifth temperature sensor 24, which are connected by pipelines to form a circulation loop.

[0043] In the cold storage unit A, the cooling function of the refrigeration unit 1 keeps the liquid inside the cold storage tank 3 at a low temperature, providing a cold source for the heat exchanger 7 in the temperature control unit. The low-temperature liquid in the cold storage tank 3 flows back to the cold storage tank 3 after passing through the heat exchanger 7. In the liquid supply unit C, the coolant in the buffer tank 9 cools the load 15 and then increases its temperature. After exchanging heat with the low-temperature liquid in the cold storage tank 3 through the heat exchanger 7, it flows back to the buffer tank 9. The second electric two-way regulating valve 26 and the electric three-way regulating valve 21 of the temperature control unit B automatically adjust their opening based on the feedback from the temperature sensors (first temperature sensor 6, second temperature sensor 8, fifth temperature sensor 24, sixth temperature sensor 25) and the flow sensor 23 on the supply and return liquid pipelines. This adjusts the flow rate of the cold and hot fluids into the heat exchanger 7, ensuring that the coolant in the buffer tank 9 remains within the range of the supply liquid temperature fluctuation, achieving temperature control and thus continuously providing constant-temperature liquid cooling to the load.

[0044] In this embodiment, pressure gauges are installed on the liquid supply lines of the cold storage unit A, the temperature control unit B, and the liquid supply unit C. 。

[0045] In this embodiment, the standby pump 12, the first liquid supply pump 18, the second liquid supply pump 19, and the temperature-controlled circulation pump 28 are all variable frequency pumps.

[0046] In this embodiment, both the cold water storage tank 3 and the buffer water tank 9 are equipped with temperature sensors and level gauges.

[0047] In this embodiment, the first electric two-way regulating valve 17, the electric three-way regulating valve 21, and the second electric two-way regulating valve 26 are all proportional regulating electric valves.

[0048] The high-load constant-temperature cooling device in this embodiment uses heat exchanger 7 as a link. Based on the feedback from temperature sensors and flow sensors in the supply and return liquid pipelines, it adjusts the frequency of temperature control circulation pump 28 in temperature control unit B and the opening of the second electric two-way regulating valve 26 and electric three-way regulating valve 21. This, in turn, adjusts the flow rate of cold and hot fluids entering heat exchanger 7 for heat exchange, ultimately keeping the liquid in buffer tank 9 within the set temperature range, achieving good temperature control, and thus providing continuous and reliable constant-temperature coolant to the load 15 equipment.

[0049] This embodiment also provides a temperature control method for a high-load constant-temperature liquid supply cooling device, including:

[0050] Step 1: The refrigeration unit 1 in the cold storage unit A maintains the liquid in the cold storage tank 3 at a stable low temperature. The temperature can be set and adjusted independently. The cold storage tank 3 is equipped with a temperature sensor and a level gauge. The amount of cold stored in the system can be calculated by measuring the temperature and level.

[0051] Step 2: The buffer tank 9 in the liquid supply unit C provides coolant at a constant temperature and with a variable flow rate to the load 15. Specifically: for heat loads with low heat flux density, low-flow-rate liquid supply can be achieved by relying on the standby mini pump 12 and the first electric two-way regulating valve 17 for bypass regulation; for heat loads with high heat flux density, the start / stop and frequency of the first liquid supply pump 18 and the second liquid supply pump 19 can be automatically determined by comparing the set flow rate and the total return flow rate.

[0052] Step 3: Based on the feedback from the temperature sensor, level gauge, flow sensor 23, and fifth temperature sensor 24 in the buffer tank 9, control the opening of the electric three-way regulating valve 21, thereby regulating the flow rate of the hot end into the heat exchanger 7. That is, the coolant after the load 15 is cooled is split through the electric three-way regulating valve 21, one path flows directly back to the buffer tank 9, and the other path exchanges heat with the low-temperature liquid in the heat exchanger 7 before flowing back to the buffer tank 9.

[0053] Step 4: The low-temperature liquid in the cold water tank 3 in the temperature control unit B enters the heat exchanger 7 through the frequency conversion adjustment of the temperature control circulation pump 28. The flow rate can be further adjusted by the bypass of the second electric two-way regulating valve 26, and then exchange heat with the return liquid (hot flow) in the liquid supply unit C.

[0054] Step 5: The electric three-way regulating valve 21 in the temperature control unit B adjusts the flow rate of the return liquid (hot flow) into the heat exchanger 7 based on the feedback from the fifth temperature sensor 24, the second temperature sensor 8 and the flow sensor 23, so as to exchange heat with the low temperature liquid (cold flow) in the cold storage unit A, thereby maintaining the temperature of the coolant in the buffer tank 9.

[0055] Step 6: The electric heater 16 performs thermal compensation on the return liquid based on the feedback from the temperature sensor in the buffer tank 9 and the third temperature sensor 14 (mainly used for the first liquid supply cycle and in low temperature environments) to further ensure the stability of the coolant temperature in the buffer tank 9.

[0056] Step 7: Multiple circulation loops are formed in the cold storage unit A, temperature control unit B, and liquid supply unit C.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-load constant-temperature liquid supply cooling device, characterized in that: It includes a cold storage unit A, a temperature control unit B, and a liquid supply unit C, which are independent yet work together. The cold storage unit A includes a refrigeration unit (1), a cold storage water tank (3), and a cold storage circulation pump (32), which form a circulation loop through pipelines; The temperature control unit B includes a heat exchanger (7), a buffer tank (9), a second electric two-way regulating valve (26), a temperature control circulating pump (28), and an electric three-way regulating valve (21). The temperature control unit B forms two sets of circulation loops with the heat exchanger (7) as the core. The cold water tank (3), the first temperature sensor (6), the heat exchanger (7), the sixth temperature sensor (25), and the temperature-controlled circulation pump (28) are connected by pipelines to form a circulation loop; the low-temperature liquid in the cold water tank (3) enters the heat exchanger (7) through the frequency conversion adjustment of the temperature-controlled circulation pump (28), and the flow rate is further adjusted by the bypass of the second electric two-way regulating valve (26), and then heat exchanged with the return liquid in the liquid supply unit C. The first temperature sensor (6) and the sixth temperature sensor (25) are respectively installed at the liquid outlet and liquid inlet of the heat exchanger (7) in the circulation loop; The heat exchanger (7), the second temperature sensor (8), the buffer tank (9), the electric three-way regulating valve (21), the flow sensor (23), and the fifth temperature sensor (24) are connected by pipelines and form another set of circulation loops with the liquid supply unit C. The coolant after cooling the load (15) is diverted by the electric three-way regulating valve (21). One path flows directly back to the buffer tank (9), and the other path exchanges heat with the low-temperature liquid in the heat exchanger (7) and then flows back to the buffer tank (9). The second temperature sensor (8) and the fifth temperature sensor (24) are respectively installed at the outlet and inlet of the heat exchanger (7) in the other set of circulation loops. A flow sensor is installed on the pipeline of the temperature control unit B; The liquid supply unit C includes a buffer tank (9), a load (15), a first electric two-way regulating valve (17), and an electric three-way regulating valve (21). The high-load constant temperature liquid supply cooling device uses the heat exchanger (7) as a link. Based on the feedback from the first temperature sensor (6), the sixth temperature sensor (25), the second temperature sensor (8), the fifth temperature sensor (24) and the flow sensor in the supply and return liquid pipeline, it adjusts the frequency of the temperature control circulation pump (28) in the temperature control unit B and the opening of the second electric two-way regulating valve (26) and the electric three-way regulating valve (21). Then, it adjusts the flow rate of the cold and hot fluids entering the heat exchanger (7) for heat exchange. Finally, it keeps the liquid in the buffer tank (9) within the set temperature range, achieves good temperature control effect, and can provide a continuous and reliable constant temperature coolant to the load (15) equipment.

2. The high-load constant-temperature liquid supply cooling device according to claim 1, characterized in that: The liquid supply unit C also includes a standby small pump (12), an electric heater (16), a first liquid supply pump (18), and a second liquid supply pump (19); the buffer tank (9), the standby small pump (12), the load (15), the electric heater (16), the first electric two-way regulating valve (17), the first liquid supply pump (18), the second liquid supply pump (19), the electric three-way regulating valve (21), and the flow sensor (23) are connected by pipelines to form a circulation loop.

3. The high-load constant-temperature liquid supply cooling device according to claim 2, characterized in that: The standby pump (12), the first liquid supply pump (18), the second liquid supply pump (19), and the temperature-controlled circulation pump (28) are all variable frequency pumps.

4. The high-load constant-temperature liquid supply cooling device according to claim 1, characterized in that: The cold storage unit A, temperature control unit B, and liquid supply unit C each include multiple sets of throttling devices.

5. The high-load constant-temperature liquid supply cooling device according to claim 1, characterized in that: Temperature sensors and level gauges are installed in both the cold storage water tank (3) and the buffer water tank (9).

6. The high-load constant-temperature liquid supply cooling device according to claim 1, characterized in that: The first electric two-way regulating valve (17), the electric three-way regulating valve (21), and the second electric two-way regulating valve (26) are all proportional regulating electric valves.

7. A high-load constant-temperature liquid supply cooling device according to claim 1, characterized in that: Pressure gauges are installed on the liquid supply lines of the cold storage unit A, temperature control unit B, and liquid supply unit C.

8. A temperature control method for a high-load constant-temperature liquid supply cooling device according to any one of claims 1 to 7, characterized in that: Includes the following steps: Step 1: The refrigeration unit (1) in the cold storage unit A keeps the liquid in the cold storage tank (3) at a stable low temperature. Its temperature is set and adjusted automatically. The cold storage tank (3) is equipped with a temperature sensor and a level gauge. The cold storage capacity is calculated by the temperature and level calculation system. Step 2: The buffer tank (9) in the liquid supply unit C provides the load (15) with a constant temperature and variable flow rate of coolant; wherein: for heat loads with low heat flux density, low flow rate liquid supply is achieved by relying on the standby small pump (12) and the first electric two-way regulating valve (17) for bypass regulation; for heat loads with high heat flux density, the start-up and shutdown and frequency of the first liquid supply pump (18) and the second liquid supply pump (19) are automatically determined by comparing the set flow rate and the total return flow rate. Step 3: Based on the feedback from the temperature sensor, level gauge and flow sensor (23) and fifth temperature sensor (24) in the buffer tank (9), control the opening of the electric three-way regulating valve (21) to adjust the flow rate of the hot end into the heat exchanger (7). That is, the coolant after cooling the load (15) is split by the electric three-way regulating valve (21), one path flows directly back to the buffer tank (9), and the other path exchanges heat with the low temperature liquid in the heat exchanger (7) before flowing back to the buffer tank (9). Step 4: The low-temperature liquid in the cold water tank (3) in temperature control unit B enters the heat exchanger (7) through the frequency conversion adjustment of the temperature control circulation pump (28), and the flow rate is further adjusted by the bypass of the second electric two-way regulating valve (26), and then heat exchanged with the return liquid in the liquid supply unit C. Step 5: The electric three-way regulating valve (21) in temperature control unit B adjusts the flow rate of the return liquid entering the heat exchanger (7) based on the feedback from the fifth temperature sensor (24), the second temperature sensor (8) and the flow sensor (23) on the pipeline, and exchanges heat with the low temperature liquid in cold storage unit A, thereby maintaining the temperature of the coolant in the buffer tank (9) stable. Step 6: Electric heating (16) performs thermal compensation on the return liquid based on the feedback from the temperature sensor in the buffer tank (9) and the third temperature sensor (14) on the pipeline, further ensuring the stability of the coolant temperature in the buffer tank (9); Step 7: Multiple circulation loops are formed in the cold storage unit A, temperature control unit B, and liquid supply unit C.

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