Temperature control system

Abstract

A temperature control system, comprising a first heat exchanger, a second heat exchanger, a first bypass branch and a first valve, wherein a first interface of the first heat exchanger is in communication with a first interface of the second heat exchanger; an inlet of the first bypass branch is connected to the first interface of the first heat exchanger, and an outlet of the first bypass branch is in communication with a second interface of the second heat exchanger, such that a heat exchange medium of the first bypass branch and a heat exchange medium of the second interface of the second heat exchanger are mixed into a mixed-temperature heat exchange medium, and the mixed-temperature heat exchange medium flows into the second interface of the first heat exchanger; and the first valve can be used for adjusting the flow of the heat exchange medium of the first bypass branch. By means of the temperature control system, a first bypass branch is introduced so as to perform high-precision fine tuning on temperature, such that full use is made of heat which is wasted by a high-temperature heat exchange medium, thereby reducing a loss of the whole system, and facilitating energy saving.

Description

A temperature control system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 28, 2023, with application number 202310789982.6 and invention name “A Temperature Control System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of temperature control, and more particularly to a temperature control system. Background Art

[0003] In the existing high-precision temperature control cooling field, such as the high-precision temperature control air-conditioning cooling system, please refer to Figure 1. The first interface of the first heat exchanger 01 is connected to the first interface of the second heat exchanger 02, and the second interface of the second heat exchanger 02 is connected to the second interface of the first heat exchanger 01 through the heater 03 and the heat buffer 04 in sequence. The first heat exchanger 01 is the terminal heat exchanger. After it exchanges heat with the equipment, the temperature of the heat exchange medium therein rises, and the high-temperature heat exchange medium flows back to the second heat exchanger 02, is re-cooled in the second heat exchanger 02, and passes through the action of the heater 03 and the heat buffer 04, and flows back into the first heat exchanger 01 to cool the external environment or equipment.

[0004] Temperature compensation in this cooling system is achieved by a heater, typically an electric heating wire. When the temperature approaches the critical required temperature, the heater electrically heats the heat exchange medium, quickly achieving the required temperature with minimal fluctuations. However, using a heater for temperature compensation, as a power-consuming device, increases overall system losses, leading to an increase in Power Usage Effectiveness (PUE), which is detrimental to energy conservation.

[0005] In summary, how to perform temperature compensation without a heater, thereby improving the high energy consumption of the cooling system, is a problem that currently needs to be solved by those skilled in the art.

[0006] Summary of the Invention

[0007] In view of this, an object of the present invention is to provide a temperature control system, the structural design of which system loop can eliminate the need for temperature compensation through a heater, thereby improving the problem of high energy consumption of the cooling system.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A temperature control system is applied to equipment with high-precision heat dissipation requirements, and the temperature control system includes:

[0010] A first heat exchanger and a second heat exchanger, wherein a first interface of the first heat exchanger is in communication with a first interface of the second heat exchanger;

[0011] a first bypass branch, wherein the inlet of the first bypass branch is connected to the first interface of the first heat exchanger, and the outlet of the first bypass branch is connected to the second interface of the second heat exchanger, so that the heat exchange medium in the first bypass branch and the heat exchange medium in the second interface of the second heat exchanger are mixed to form a mixed temperature heat exchange medium and then flow into the second interface of the first heat exchanger;

[0012] The first valve can be used to adjust the flow rate of the heat exchange medium in the first bypass branch to adjust the temperature of the mixed heat exchange medium until the temperature difference between the mixed heat exchange medium and the preset target heat exchange medium temperature is in the range of (-0.3 to 0.3) °C.

[0013] Optionally, the above-mentioned temperature control system also includes a first temperature sensor for detecting the temperature of the mixed heat exchange medium, and a controller, wherein the controller is used to control the opening of the first valve according to the detection value of the first temperature sensor, so as to adjust the flow rate of the heat exchange medium of the first bypass branch by controlling the opening rate of the first valve, so that the flow rate of the heat exchange medium of the first bypass branch is (0.1~10)% of the flow rate of the heat exchange medium of the second interface of the second heat exchanger.

[0014] Optionally, the temperature control system further includes a second temperature sensor for detecting the temperature of the heat exchange medium at the second interface of the second heat exchanger, and the controller further controls the opening of the first valve according to the detection value of the second temperature sensor.

[0015] Optionally, the temperature control system further includes a first flow sensor for detecting the flow of the working medium in the first bypass branch, and the controller further controls the opening of the first valve according to the detection value of the first flow sensor.

[0016] Optionally, the above-mentioned temperature control system also includes a second flow sensor arranged at the first interface of the first heat exchanger, and the second flow sensor is used to detect the flow of the heat exchange medium at the first interface of the first heat exchanger. The controller also controls the opening of the first valve according to the detection value of the second flow sensor.

[0017] Optionally, in the above-mentioned temperature control system, the accuracy of the first temperature sensor and the second temperature sensor is within ±0.3°C, the accuracy of the first valve is within 1%, and the accuracy of the first flow sensor and the second flow sensor is within 1%.

[0018] Optionally, the above-mentioned temperature control system further includes a third temperature sensor or a first pressure sensor arranged at the first interface of the first heat exchanger, and / or a fourth temperature sensor or a second pressure sensor arranged at the second interface of the first heat exchanger; wherein, the third temperature sensor or the first pressure sensor is used to detect the temperature or pressure of the heat exchange medium of the first interface of the first heat exchanger, and the fourth temperature sensor or the second pressure sensor is used to detect the temperature or pressure of the heat exchange medium of the second interface of the first heat exchanger, and the controller also adjusts the preset target heat exchange medium temperature of the second interface of the first heat exchanger according to the heat exchange medium temperature or pressure of the second interface of the first heat exchanger, and / or the heat exchange medium temperature or pressure of the first interface of the first heat exchanger.

[0019] Optionally, the above-mentioned temperature control system also includes a mixer that mixes the heat exchange medium of the first bypass branch and the heat exchange medium of the second interface of the second heat exchanger into a mixed temperature heat exchange medium, and the mixer is respectively connected to the outlet of the first bypass branch and the second interface of the second heat exchanger; at least one blocking component is provided in the mixer, and there is a gap between the blocking component and the inner wall of the mixer.

[0020] Optionally, the above-mentioned temperature control system also includes a thermal buffer device, which is connected between the second interface of the first heat exchanger and the outlet of the mixer; a heater for adjusting the temperature of the mixed heat exchange medium is also provided between the thermal buffer device and the mixer, and a driving pump is provided between the heater and the mixer; a water tank for storing the mixed heat exchange medium is also provided between the driving pump and the mixer.

[0021] Optionally, the above-mentioned temperature control system also includes a second bypass branch connected to the first interface and the second interface of the first heat exchanger respectively, and the second bypass branch is used to bypass part of the working fluid of the first interface of the first heat exchanger to the second interface of the first heat exchanger, and the second bypass branch is provided with a second valve.

[0022] The temperature control system provided by the present invention includes a first heat exchanger, a second heat exchanger, a first bypass branch and a first valve. The first interface of the first heat exchanger is connected to the first interface of the second heat exchanger, the inlet of the first bypass branch is connected to the first interface of the first heat exchanger, and the outlet of the first bypass branch is connected to the second interface of the second heat exchanger, so that the heat exchange medium of the first bypass branch and the heat exchange medium of the second interface of the second heat exchanger are mixed into a mixed heat exchange medium and flow into the second interface of the first heat exchanger. The first valve can be used to adjust the flow rate of the heat exchange medium of the first bypass branch to adjust the temperature of the mixed heat exchange medium until the temperature difference between the temperature of the mixed heat exchange medium and the temperature of the preset target heat exchange medium is in the range of (-0.3~0.3)℃.

[0023] By applying the temperature control system provided by the present invention, the high-temperature heat exchange medium flowing out of the first interface of the first heat exchanger flows through the second heat exchanger for cooling to reach a temperature close to the target cooling temperature, which is slightly lower than the target cooling temperature. Through the first bypass branch, part of the high-temperature heat exchange medium of the first interface of the first heat exchanger is transported to the first interface of the second heat exchanger and the two are mixed. The flow rate of the first bypass branch is usually small, so as to achieve high-precision fine-tuning of the temperature, and the adjusted mixed temperature heat exchange medium is transported to the second interface of the first heat exchanger. After the first heat exchanger absorbs the heat of the device or environment that needs to be cooled, the high-temperature heat exchange medium flows out from the first interface to form a circulation loop. In summary, the temperature control system provided by the present invention, by introducing the first bypass branch, makes full use of the heat of the high-temperature heat exchange medium wasted in the electric heating method, and can achieve temperature compensation without setting a heater, thereby reducing the loss of the entire system and being beneficial to energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] FIG1 is a schematic structural diagram of a temperature control system in the prior art;

[0026] FIG2 is a schematic structural diagram of a temperature control system according to a specific embodiment of the present invention;

[0027] FIG3 is a schematic diagram of a first valve connection;

[0028] FIG4 is another schematic diagram of the first valve connection;

[0029] FIG5 is a schematic structural diagram of a temperature control system according to another embodiment of the present invention;

[0030] FIG6 is a schematic diagram of an external circuit of a second heat exchanger;

[0031] FIG7 is a schematic structural diagram of a temperature control system according to another specific embodiment of the present invention.

[0032] The following are marked in the accompanying drawings:

[0033] First heat exchanger 1, second heat exchanger 2, inlet A of the first bypass branch, outlet B of the first bypass branch, first valve 3, mixer 4, blocking component 41, heat buffer 5, compressor cooling circuit 6, expansion valve 61, bypass valve 62, compressor 63, cooling water cooling circuit 7, third heat exchanger 71, second valve 8, drive pump 9, water tank 10, heater 11. DETAILED DESCRIPTION

[0034] An embodiment of the present invention discloses a temperature control system, which distributes waste heat through flow regulation, realizes temperature compensation and reduces energy consumption of temperature compensation.

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The temperature control system provided by the present invention is applied to equipment with high-precision heat dissipation requirements. By introducing a first bypass branch, a portion of the high-temperature heat exchange medium of the first heat exchanger 1 is introduced into the outlet of the second heat exchanger 2. This utilizes the heat wasted by the high-temperature heat exchange medium to achieve fine-tuning of the outlet temperature. The configuration of the main cooling circuit formed by the first heat exchanger 1 and the second heat exchanger 2 can refer to the structure of a conventional cooling system. It should be noted that in this embodiment, high precision refers to the requirement that the temperature control accuracy deviation value is within the target temperature ±0.3°C and its range.

[0037] Please refer to FIG2 , which is a schematic structural diagram of a temperature control system according to a specific embodiment of the present invention.

[0038] In one embodiment, the temperature control system provided by the present invention includes a first heat exchanger 1, a second heat exchanger 2, a first bypass branch, and a first valve 3. The first heat exchanger 1 serves as the terminal heat exchanger, exchanging heat with components or environments requiring cooling. The second heat exchanger 2 cools the high-temperature heat exchange medium flowing out of the first heat exchanger 1. It is understood that the heat exchange medium includes, but is not limited to, coolant liquids such as cooling water, and may also be a fluid such as gas, as needed. The first interface of the first heat exchanger 1 communicates with the first interface of the second heat exchanger 2, and the second interface of the second heat exchanger 2 communicates with the first interface of the first heat exchanger 1. The first interface of the first heat exchanger 1 serves as the return port of the temperature control system, and the second interface of the first heat exchanger 1 serves as the outlet port of the temperature control system. The high-precision temperature-controlled heat exchange medium flowing out of the outlet port of the temperature control system is supplied to the components requiring cooling via the first heat exchanger 1. The heat exchange medium at the return port of the temperature control system exchanges heat with the components or environments requiring cooling in the first heat exchanger 1, absorbs heat from the components or environments requiring cooling, and then flows through the second heat exchanger 2 for cooling. The inlet A of the first bypass branch is connected to the first interface of the first heat exchanger 1, and the outlet B of the first bypass branch is connected to the second interface of the second heat exchanger 2, so that the heat exchange medium of the first bypass branch and the heat exchange medium of the second interface of the second heat exchanger 2 are mixed into a mixed temperature heat exchange medium and flow into the second interface of the first heat exchanger 1. The first valve 3 can be used to adjust the flow rate of the heat exchange medium of the first bypass branch to adjust the temperature of the mixed temperature heat exchange medium until the temperature difference between the mixed temperature heat exchange medium and the preset target temperature of the heat exchange medium is in the range of -0.3 to 0.3°C. Among them, the preset target temperature of the heat exchange medium can specifically refer to the target temperature of the second interface of the first heat exchanger 1. The first valve 3 can be specifically arranged in the first bypass branch.

[0039] By applying the temperature control system provided by the present invention, the high-temperature heat exchange medium flowing out of the first interface of the first heat exchanger 1 flows through the second heat exchanger 2 for cooling to reach a temperature close to the target cooling temperature, which is slightly lower than the target cooling temperature. Through the first bypass branch, part of the high-temperature heat exchange medium of the first interface of the first heat exchanger 1 is transported to the first interface of the second heat exchanger 2 and the two are mixed. The flow rate of the first bypass branch is usually small, so as to achieve high-precision fine-tuning of the temperature, and the adjusted mixed temperature heat exchange medium is transported to the second interface of the first heat exchanger 1. After the first heat exchanger 1 absorbs the heat of the device or environment that needs to be cooled, the high-temperature heat exchange medium flows out from the first interface to form a circulation loop. In summary, the temperature control system provided by the present invention, by introducing the first bypass branch, makes full use of the heat wasted by the high-temperature heat exchange medium, and can achieve temperature compensation without setting a heater, thereby reducing the loss of the entire system and being beneficial to energy saving.

[0040] In one embodiment, the flow rate of the outlet B of the first bypass branch is not higher than the flow rate of the second interface of the second heat exchanger 2. Specifically, the flow rate of the heat exchange medium of the first bypass branch is (0.1 to 10)% of the flow rate of the heat exchange medium of the second interface of the second heat exchanger 2. The heat exchange medium flowing out of the first interface of the first heat exchanger 1 can partially enter the first bypass branch and partially enter the first interface of the second heat exchanger 2. Specifically, the flow rate entering the first bypass branch is regulated by the first valve 3, and the flow rate of the outlet B of the first bypass branch is controlled to be no higher than the flow rate of the second interface of the second heat exchanger 2, and the temperature difference between the temperature of the mixed heat exchange medium and the preset target heat exchange medium temperature is in the range of -0.3 to 0.3°C. Since the first bypass branch is used as a temperature compensation adjustment to replace the conventional heater, its flow rate is usually small, and the smaller the flow rate, the higher the relative accuracy.

[0041] Among them, the first valve 3 is a regulating valve with adjustable opening, and its opening can be adjusted by manual control. At this time, the first valve 3 can be a mechanical valve, and its opening can be slowly adjusted manually. Alternatively, the first valve 3 can be an electronic valve, and its opening can be controlled and adjusted by the system controller. In this embodiment, the first valve 3 is preferably set to an electronic valve, and its opening is controlled and adjusted by the controller, which has higher adjustment accuracy.

[0042] In one embodiment, the temperature control system also includes a first temperature sensor T1 for detecting the temperature of the mixed-temperature heat exchange medium. The temperature of the mixed-temperature heat exchange medium is detected by the first temperature sensor T1, thereby providing a basis for adjusting the flow of the first bypass branch, that is, adjusting the opening of the first valve 3 according to the temperature of the mixed-temperature heat exchange medium, thereby changing the flow of the first bypass branch and further improving the control accuracy.

[0043] In one embodiment, the temperature control system further includes a controller configured to control the opening of the first valve 3 based on the detection value of the first temperature sensor T1, so as to adjust the flow rate of the heat exchange medium in the first bypass branch by controlling the opening of the first valve 3, so that the flow rate of the heat exchange medium in the first bypass branch is (0.1-10)% of the flow rate of the heat exchange medium at the second interface of the second heat exchanger 2. The controller controls the flow rate of the first bypass branch within this numerical range based on the first temperature sensor T1, thereby meeting the high precision requirements of the temperature control system.

[0044] In one embodiment, the temperature control system further includes a second temperature sensor T2 for detecting the temperature of the heat exchange medium at the second interface of the second heat exchanger 2. It is understood that the second temperature sensor T2 should be located before the point where the first bypass branch connects to the second interface of the second heat exchanger 2 to allow mixing of the two. By detecting the temperature of the second interface of the second heat exchanger 2 via the second temperature sensor T2, the flow rate of the first bypass branch can be adjusted accordingly. That is, the opening of the first valve 3 is controlled based on the temperature of the heat exchange medium at the second interface of the second heat exchanger 2, thereby changing the flow rate in the first bypass branch. In this way, the opening of the first valve 3 can be precisely controlled based on the detection values ​​of the first temperature sensor T1, the detection values ​​of the second temperature sensor T2, and the preset target temperature of the heat exchange medium, thereby precisely adjusting the flow rate of the heat exchange medium in the first bypass branch and adjusting the temperature of the mixed heat exchange medium until the temperature difference between the mixed heat exchange medium and the preset target temperature is within a range of (-0.3 to 0.3)°C, achieving higher regulation accuracy.

[0045] Furthermore, the controller also controls the opening of the first valve 3 based on the detection value of the second temperature sensor T2. By controlling the opening of the first valve 3 based on the detection values ​​of the first temperature sensor T1 combined with the second temperature sensor T2, the controller further improves control accuracy and reduces the impact of temperature fluctuations of the heat exchange medium at the second interface of the second heat exchanger 2 on the temperature control accuracy of the mixed-temperature heat exchange medium.

[0046] In one embodiment, the temperature control system further includes a first flow sensor F1 for detecting the flow rate of the working medium in the first bypass branch. The flow rate of the first bypass branch is fed back through the first flow sensor F1, i.e., feedback adjustment is performed based on the detected value of the flow rate of the first bypass branch, thereby facilitating precise control of the flow rate of the first bypass branch. Furthermore, the controller controls the opening of the first valve 3 based on the detection value of the first flow sensor F1.

[0047] In one embodiment, the temperature control system further includes a second flow sensor F2 disposed at the first interface of the first heat exchanger 1. The second flow sensor F2 is used to detect the flow rate of the heat exchange medium at the first interface of the first heat exchanger 1. By providing feedback from the second flow sensor F2 on the flow rate at the first interface of the first heat exchanger 1, the opening of the first valve 3 can be controlled based on the detected flow rate at the first interface of the first heat exchanger 1, thereby varying the flow rate in the first bypass branch and facilitating precise control of the flow rate in the first bypass branch. Furthermore, the controller controls the opening of the first valve 3 based on the detected value of the second flow sensor F2, thereby precisely controlling the flow rate in the first bypass branch.

[0048] In one embodiment, in order to ensure the high precision of the temperature control system, the accuracy of the first temperature sensor T1 and the second temperature sensor T2 are both within ±0.03°C, the accuracy of the first valve is within 1%, and the accuracy of the first flow sensor F1 and the second flow sensor F2 are both within 1%. In this way, the temperature control system can be used in a high-precision adjustment system to perform temperature adjustment on equipment with high-precision heat dissipation requirements, meet the high-precision requirements of the high-precision temperature adjustment system for temperature monitoring and valve opening, and match the high-precision adjustment of the temperature control system.

[0049] In one embodiment, the temperature control system further includes a third temperature sensor T3 or a first pressure sensor P1, and / or a fourth temperature sensor T4 or a second pressure sensor P2 for monitoring changes in the load of the first heat exchanger 1, wherein the third temperature sensor T3 or the first pressure sensor P1 is arranged at the first interface of the first heat exchanger 1, and the fourth temperature sensor T4 or the second pressure sensor P2 is arranged at the second interface of the first heat exchanger 1; by monitoring changes in temperature or pressure of the first interface and / or the second interface of the first heat exchanger 1, changes in the load of the first heat exchanger 1 can be monitored, that is, changes in heat exchange of the parts or environment that need to be cooled down in the first heat exchanger 1 can be monitored. When the load heat exchange demand increases or decreases, the temperature control temperature of the entire temperature control system can be adjusted in time to always match the heat exchange demand of the load.

[0050] In this way, the temperature detected by the third temperature sensor T3 or the pressure detected by the first pressure sensor P1, or the temperature detected by the fourth temperature sensor T4 or the pressure detected by the second pressure sensor P2, can be adjusted in time to control the opening of the first valve 3, thereby realizing flow regulation of the first bypass branch, so that the temperature of the mixed-temperature heat exchange medium can reach the preset target heat exchange medium temperature after the load is updated.

[0051] Furthermore, the controller also adjusts the preset target heat exchange medium temperature of the second interface of the first heat exchanger 1 according to the heat exchange medium temperature or pressure of the second interface of the first heat exchanger 1, and / or the heat exchange medium temperature or pressure of the first interface of the first heat exchanger 1. The detection of pressure can convert the feedback of the corresponding flow. When the load at the end changes, the third temperature sensor T3 or the first pressure sensor P1, and / or the fourth temperature sensor T4 or the second pressure sensor P2 feedbacks the change of the return water temperature or flow, the outlet temperature or flow, or the temperature difference or flow between the two, and then adjusts the opening of the first valve 3 accordingly to achieve precise control.

[0052] In one embodiment, the first valve 3 can be a two-way valve or a three-way valve. Referring to Figure 3 , the first valve 3 is a two-way valve, wherein the first interface of the two-way valve is connected to the first interface of the first heat exchanger 1, and the second interface of the two-way valve is connected to the second interface of the second heat exchanger 2. That is, the first interface of the two-way valve is the inlet A of the first bypass branch. In other embodiments, referring to Figure 4 , the first valve 3 is a three-way valve, wherein the first interface of the three-way valve is connected to the first interface of the first heat exchanger 1, the second interface of the three-way valve is connected to the second interface of the second heat exchanger 2, and the third interface of the three-way valve is connected to the first interface of the second heat exchanger 2. The first interface of the three-way valve is connected to the second interface and the third interface respectively, and the flow of the first bypass branch is regulated by the three-way valve.

[0053] In one embodiment, referring to FIG2 , the temperature control system further includes a mixer 4 , which mixes the heat exchange medium in the first bypass branch with the heat exchange medium at the second interface of the second heat exchanger 2 to form a mixed heat exchange medium. The inlet of the mixer 4 is connected to the outlet B of the first bypass branch and the second interface of the second heat exchanger 2 , respectively, while the outlet of the mixer 4 is connected to the second interface of the first heat exchanger 1 . The provision of the mixer 4 accelerates temperature uniformity and improves the efficiency and accuracy of the overall temperature control system. In other embodiments, the mixer 4 may not be provided. For example, the outlet B of the first bypass branch and the second interface of the second heat exchanger 2 may be connected to the second interface of the first heat exchanger 1 via a main pipe, and mixing occurs within the main pipe. Alternatively, the outlet B of the first bypass branch may be connected to the pipeline between the second interface of the second heat exchanger 2 and the second interface of the first heat exchanger 1 , which can also achieve mixing. Specifically, when the mixer 4 is provided, a first temperature sensor T1 may be provided at the outlet of the mixer 4 to detect the temperature of the mixed heat exchange medium at the outlet of the mixer 4 .

[0054] In one embodiment, at least one barrier member 41 is provided within the mixer 4, with a gap between the barrier member 41 and the inner wall of the mixer 4. In other words, the barrier member 41 is in a semi-enclosed state. The barrier member 41 is provided to guide the fluid within the mixer 4 and extend the flow path within the mixer 4, thereby achieving more uniform mixing. Specifically, the barrier member 41 may be a baffle.

[0055] In one embodiment, the temperature control system further includes a thermal buffer device 5 connected between the second port of the first heat exchanger 1 and the outlet of the mixer 4. The thermal buffer device 5 is provided to adjust the temperature stability. After achieving high-precision temperature fine-tuning through the first bypass branch, the temperature is further stabilized, and the temperature-stabilized heat exchange medium is provided to the second port of the first heat exchanger 1, achieving precise control.

[0056] In one embodiment, as shown in Figure 5 , a heater 11 is provided between the thermal buffer device 5 and the mixer 4 to regulate the temperature of the mixed-temperature heat exchange medium. A drive pump 9 is provided between the heater 11 and the mixer 4. A water tank 10 is also provided between the drive pump 9 and the mixer 4 to store the mixed-temperature heat exchange medium. The heater 11 positioned after the mixer 4 further heats the mixed-temperature heat exchange medium passing through the mixer 4, achieving further temperature compensation. The first bypass branch and the heater 11 work together to achieve multi-stage temperature compensation, further improving temperature control accuracy. The drive pump 9 provides power for the flow of the mixed-temperature heat exchange medium. Furthermore, the water tank 10 provides a larger buffer space for the heat exchange medium, enabling better mixing and more uniform temperature distribution, further enhancing the accuracy and stability of the temperature control system. A seventh temperature sensor T7 can be installed at the outlet of the heater 11, and a third pressure sensor P3 can be installed at the outlet of the drive pump 9. An eighth temperature sensor T8 can be installed in the infusion line of the water tank 10.

[0057] In one embodiment, the second heat exchanger 2 is externally connected to at least one of a compressor cooling circuit 6 and a cooling water cooling circuit 7. The compressor cooling circuit 6 or the cooling water cooling circuit 7 cools the heat exchange medium flowing through the second heat exchanger 2 to the temperature of the water outlet. Using the compressor cooling circuit 6 or the cooling water cooling circuit 7 provides higher cooling efficiency. In other embodiments, the second heat exchanger 2 can also be cooled by air cooling or other methods.

[0058] In one embodiment, referring to Figure 2 , the second heat exchanger 2 is connected only to an external cooling water cooling circuit 7. The second heat exchanger 2 includes a third interface and a fourth interface, where the third interface serves as a cooling medium outlet and the fourth interface serves as a cooling medium inlet. The external cooling medium cools the heat exchange medium within the second heat exchanger 2. Specifically, the third interface can be connected to a fifth temperature sensor T5, and the fourth interface can be connected to a sixth temperature sensor T6 and a third flow sensor F3, respectively, for detecting the cooling medium temperature.

[0059] In one embodiment, referring to FIG6 , the cooling water circuit includes a third heat exchanger 71 , the compressor cooling circuit 6 includes an expansion valve 61 , a bypass valve 62 , and a compressor 63 , and the second heat exchanger 2 includes a third interface and a fourth interface. The third interface is connected to the first interface of the third heat exchanger 71 via the expansion valve 61 , and the second interface of the third heat exchanger 71 is connected to the fourth interface of the second heat exchanger 2 via the compressor 63 . The bypass valve 62 is connected between the first interface of the third heat exchanger 71 and the second interface of the second heat exchanger 2 . The third heat exchanger 71 is connected to an external cooling medium. The cooling medium connected to the third heat exchanger 71 first cools the heat exchange medium within it. The initially cooled heat exchange medium is further cooled by the compressor 63 , thereby cooling the heat exchange medium within the second heat exchanger 2 . Specifically, the third heat exchanger 71 includes a third interface and a fourth interface. The third interface is the cooling medium outlet, and the fourth interface is the cooling medium inlet. The external cooling medium cools the heat exchange medium within the third heat exchanger 71 . Specifically, the third interface of the third heat exchanger 71 can be connected to a fifth temperature sensor T5, and the fourth interface can be connected to a sixth temperature sensor T6, respectively, for detecting the temperature of the cooling medium. The expansion valve 61 and bypass valve 62 in the compressor cooling circuit 6 can be used to prevent overheating of the compressor 63 and to bypass hot gas.

[0060] In other embodiments, the cooling water cooling circuit 7 may not be provided, and the heat exchange medium in the second heat exchanger 2 may be cooled only by the compressor cooling circuit 6. Depending on the load variation, when the cooling water cooling circuit 7 can meet the load requirements, the cooling water cooling circuit 7 is preferred. When the cooling water cooling circuit 7 does not meet the load requirements, the compressor cooling circuit 6 may be used alone, or as shown in FIG5 , the compressor cooling circuit 6 and the cooling water cooling circuit 7 may be combined to supplement the cooling capacity or temperature difference.

[0061] In one embodiment, referring to Figure 7 , the temperature control system further includes a second bypass branch, which is connected to the first port and the second port of the first heat exchanger 1, respectively. The second bypass branch is used to bypass a portion of the working fluid from the first port of the first heat exchanger 1 to the second port of the first heat exchanger 1. A second valve 8 is provided within the second bypass branch for regulating the flow rate of the second bypass branch. The second bypass branch can introduce the mixed-temperature heat exchange medium into the first port of the first heat exchanger 1. The provision of the second bypass branch enables flow regulation of the system to control the flow rate of the heat exchange medium flowing into the first heat exchanger 1.

[0062] Specifically, the second valve 8 is a three-way valve, the first interface of the three-way valve is connected to the first interface of the first heat exchanger 1, the second interface is connected to the second interface of the first heat exchanger 1, and the third interface is connected after the outlet B of the first bypass branch and the second interface connection position of the second heat exchanger 2, and the third interface of the three-way valve is respectively connected to the first interface and the second interface of the three-way valve.

[0063] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0064] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A temperature control system, characterized in that: Applied to equipment with high-precision heat dissipation requirements, the temperature control system includes: A first heat exchanger (1) and a second heat exchanger (2), wherein a first interface of the first heat exchanger (1) is in communication with a first interface of the second heat exchanger (2); a first bypass branch, wherein the inlet (A) of the first bypass branch is connected to the first interface of the first heat exchanger (1), and the outlet (B) of the first bypass branch is connected to the second interface of the second heat exchanger (2), so that the heat exchange medium of the first bypass branch and the heat exchange medium of the second interface of the second heat exchanger (2) are mixed to form a mixed temperature heat exchange medium and flow into the second interface of the first heat exchanger (1); The first valve (3) can be used to adjust the flow rate of the heat exchange medium in the first bypass branch to adjust the temperature of the mixed temperature heat exchange medium until the temperature difference between the mixed temperature heat exchange medium and the preset target temperature of the heat exchange medium is in the range of (-0.3 to 0.3)°C.

2. The temperature control system according to claim 1, characterized in that: The device also includes a first temperature sensor for detecting the temperature of the mixed-temperature heat exchange medium, and a controller, wherein the controller is used to control the opening of the first valve (3) according to the detection value of the first temperature sensor, so as to adjust the flow rate of the heat exchange medium in the first bypass branch by controlling the opening rate of the first valve, so that the flow rate of the heat exchange medium in the first bypass branch is (0.1 to 10)% of the flow rate of the heat exchange medium at the second interface of the second heat exchanger (2).

3. The temperature control system according to claim 2, characterized in that: It also includes a second temperature sensor for detecting the temperature of the heat exchange medium at the second interface of the second heat exchanger (2), and the controller also controls the opening of the first valve (3) according to the detection value of the second temperature sensor.

4. The temperature control system according to claim 3, characterized in that: It also includes a first flow sensor for detecting the flow of the working medium in the first bypass branch, and the controller also controls the opening of the first valve (3) according to the detection value of the first flow sensor.

5. The temperature control system according to claim 4, characterized in that: It also includes a second flow sensor arranged at the first interface of the first heat exchanger (1), the second flow sensor is used to detect the flow of the heat exchange medium at the first interface of the first heat exchanger (1), and the controller also controls the opening of the first valve (3) according to the detection value of the second flow sensor.

6. The temperature control system according to any one of claim 5, characterized in that: The accuracy of the first temperature sensor and the second temperature sensor is within ±0.3°C, the accuracy of the first valve (3) is within 1%, and the accuracy of the first flow sensor and the second flow sensor is within 1%.

7. The temperature control system according to claim 2, characterized in that: It also includes a third temperature sensor or a first pressure sensor arranged at the first interface of the first heat exchanger (1), and / or a fourth temperature sensor or a second pressure sensor arranged at the second interface of the first heat exchanger (1); wherein the third temperature sensor or the first pressure sensor is used to detect the temperature or pressure of the heat exchange medium at the first interface of the first heat exchanger (1), and the fourth temperature sensor or the second pressure sensor is used to detect the temperature or pressure of the heat exchange medium at the second interface of the first heat exchanger (1); the controller also adjusts the preset target heat exchange medium temperature of the second interface of the first heat exchanger (1) according to the heat exchange medium temperature or pressure of the second interface of the first heat exchanger (1), and / or the heat exchange medium temperature or pressure of the first interface of the first heat exchanger (1).

8. The temperature control system according to claim 1, characterized in that: The invention also comprises a mixer (4) for mixing the heat exchange medium of the first bypass branch with the heat exchange medium of the second interface of the second heat exchanger (2) into a mixed temperature heat exchange medium, wherein the mixer (4) is respectively connected to the outlet (B) of the first bypass branch and the second interface of the second heat exchanger (2); and the mixer (4) is provided with at least one baffle component (41), and a gap is provided between the baffle component (41) and the inner wall of the mixer (4).

9. The temperature control system according to claim 8, characterized in that: The heat exchanger (1) further comprises a heat buffer device (5), the heat buffer device (5) being connected between the second interface of the first heat exchanger (1) and the outlet of the mixer (4); a heater (11) for adjusting the temperature of the mixed-temperature heat exchange medium is provided between the heat buffer device (5) and the mixer (4); a driving pump (9) is provided between the heater (11) and the mixer (4); and a water tank (10) for storing the mixed-temperature heat exchange medium is provided between the driving pump (9) and the mixer (4).

10. The temperature control system according to claim 1, characterized in that: It also comprises a second bypass branch connected to the first interface and the second interface of the first heat exchanger (1) respectively, the second bypass branch being used to bypass part of the working fluid of the first interface of the first heat exchanger (1) to the second interface of the first heat exchanger (1), and the second bypass branch being provided with a second valve (8).

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