A high-precision temperature control system

Abstract

The application relates to the technical field of temperature control, and particularly discloses a high-precision temperature control system which comprises a first heat exchanger, a second heat exchanger, a first bypass branch, a second bypass branch, a first valve and a second valve. Heat exchange medium of the first bypass branch is mixed with heat exchange medium of a second interface of the second heat exchanger to form first mixed temperature heat exchange medium, heat exchange medium of the second bypass branch is mixed with the first mixed temperature heat exchange medium to form second mixed temperature heat exchange medium, the first valve is arranged in the first bypass branch, and the second valve is arranged in the second bypass branch. The high-precision temperature control system can make the temperature difference between the temperature of the second mixed temperature heat exchange medium and the temperature of preset target heat exchange medium be (0.1-0.1) DEG C, improve the temperature compensation precision, and thus realize high-precision control of the temperature control system.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology, and more specifically, to a high-precision temperature control system. Background Technology

[0002] For existing applications in high-precision temperature control and cooling, such as high-precision temperature control air conditioning cooling systems, please refer to [link / reference]. Figure 1 The first port of the first heat exchanger 01 is connected to the first port of the second heat exchanger 02. The second port of the second heat exchanger 02 is connected to the second port of the first heat exchanger 01 in sequence via the heater 03 and the heat buffer 04. The first heat exchanger 01 is a terminal heat exchanger. After exchanging heat with the external environment or equipment, the temperature of the heat exchange medium inside it rises. The high-temperature heat exchange medium flows back to the second heat exchanger 02, is cooled again in the second heat exchanger 02, and flows back into the first heat exchanger 01 to cool the external environment or equipment after passing through the heater 03 and the heat buffer 04.

[0003] Temperature compensation in this cooling system is achieved by a heater, typically an electric heating wire. That is, when the temperature approaches the critical required temperature, the heat exchange medium is electrically heated by the heater to achieve the desired temperature and minimize fluctuations. However, temperature compensation via a single-stage electric heating method is energy-intensive and has relatively low accuracy.

[0004] In summary, how to effectively improve the low accuracy of cooling systems without using heaters is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a high-precision temperature control system that does not require temperature compensation through a heater, thereby improving the problem of low accuracy in cooling systems.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-precision temperature control system is applied to equipment with high-precision heat dissipation requirements. The high-precision temperature control system includes a first heat exchanger and a second heat exchanger, wherein a first interface of the first heat exchanger is connected to a first interface of the second heat exchanger.

[0008] The first bypass branch has its inlet connected to the first interface of the first heat exchanger and its outlet 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 to form a first mixed-temperature heat exchange medium.

[0009] The second bypass branch has its inlet connected to the first bypass branch and its outlet connected to the second interface of the second heat exchanger, so that the heat exchange medium of the second bypass branch is mixed with the first mixed-temperature heat exchange medium to form a second mixed-temperature heat exchange medium.

[0010] A first valve is installed in the first bypass branch and can be used to adjust the flow rate of the heat exchange medium in the first bypass branch. A second valve is installed in the second bypass branch and can be used to adjust the flow rate of the heat exchange medium in the second bypass branch, so as to adjust the temperature of the first mixed-temperature heat exchange medium and the temperature of the second mixed-temperature heat exchange medium until the temperature difference between the temperature of the second mixed-temperature heat exchange medium and the temperature of the preset target heat exchange medium is within the range of (-0.1 to 0.1)℃.

[0011] Optionally, the above-mentioned high-precision temperature control system further includes a first temperature sensor for detecting the temperature of the first mixed-temperature heat exchange medium, a second temperature sensor for detecting the temperature of the second mixed-temperature heat exchange medium, and a controller. The controller is used to control the opening degree of the first valve and the second valve according to the detection value of the first temperature sensor and the detection value of the second temperature sensor, so as to adjust the flow rate of the heat exchange medium in the first bypass branch by controlling the opening degree of the first valve and the flow rate of the heat exchange medium in the second bypass branch by controlling the opening degree of the second valve, 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, and the flow rate of the heat exchange medium in the second bypass branch is (0.1~10)% of the flow rate of the heat exchange medium in the first bypass branch.

[0012] Optionally, the high-precision temperature control system described above also includes a third 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 degree of the first valve based on the detection value of the third temperature sensor.

[0013] Optionally, the high-precision temperature control system described above also includes a first flow sensor for detecting the flow rate of the heat exchange medium in the first bypass branch, and the controller further controls the opening degree of the first valve and the opening degree of the second valve based on the detection value of the first flow sensor.

[0014] Optionally, the above-mentioned high-precision temperature control system also includes a second flow sensor disposed at the first interface of the first heat exchanger. The second flow sensor is used to detect the flow rate of the heat exchange medium at the first interface of the first heat exchanger. The controller also controls the opening degree of the first valve and the opening degree of the second valve according to the detection value of the second flow sensor.

[0015] Optionally, in the above-mentioned high-precision temperature control system, the accuracy of the first temperature sensor and the third temperature sensor is within ±0.3℃, the accuracy of the second temperature sensor is within ±0.1℃, the accuracy of the first valve and the second valve is within 1%, and the accuracy of the first flow sensor and the second flow sensor is within 1%.

[0016] Optionally, the above-mentioned high-precision temperature control system also includes a fourth temperature sensor or a first pressure sensor for monitoring changes in the load of the first heat exchanger, and / or a fifth temperature sensor or a second pressure sensor.

[0017] The fourth temperature sensor or the first pressure sensor is located at the first interface of the first heat exchanger, and the fifth temperature sensor or the second pressure sensor is located at the second interface of the first heat exchanger.

[0018] Optionally, the above-mentioned high-precision temperature control system further includes a first mixer 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 to form a first mixed-temperature heat exchange medium, and a second mixer for mixing the heat exchange medium of the second bypass branch with the first mixed-temperature heat exchange medium to form a second mixed-temperature heat exchange medium; both the first mixer and the second mixer are provided with at least one baffle component, and the baffle component has a gap with the inner wall of the first mixer or the second mixer.

[0019] Optionally, the above-mentioned high-precision temperature control system further includes a heat buffer device, which is connected between the first heat exchanger and the second mixer; a drive pump is provided between the second mixer and the first mixer.

[0020] Optionally, the above-mentioned high-precision temperature control system further includes a third bypass branch connected to the first interface and the second interface of the first heat exchanger respectively. The third 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 third bypass branch is provided with a third valve.

[0021] The high-precision temperature control system provided by this invention uses a first bypass branch and a second bypass branch for temperature compensation. Through the first bypass branch, a portion of the high-temperature heat exchange medium from the first interface of the first heat exchanger is transported to the first interface of the second heat exchanger, where they are mixed to form a first mixed-temperature heat exchange medium. The flow rate of the first bypass branch is typically small; specifically, the flow rate of the heat exchange medium in the first bypass branch is adjusted by a first valve to achieve high-precision temperature fine-tuning. The adjusted first mixed-temperature heat exchange medium is then mixed with the heat exchange medium from the second bypass branch to form a second mixed-temperature heat exchange medium. Specifically, the flow rate of the heat exchange medium in the second bypass branch is adjusted by a second valve. Through the second bypass branch, the temperature of the first mixed-temperature heat exchange medium is further precisely adjusted, thereby improving temperature control accuracy. The temperature difference between the second mixed-temperature heat exchange medium and the preset target heat exchange medium temperature is within the range of (-0.1 to 0.1)℃. In summary, the high-precision temperature control system provided by this application fully utilizes the heat wasted by electric heating of the high-temperature heat exchange medium, achieving temperature compensation without the need for a heater, reducing overall system losses, and contributing to energy conservation. Furthermore, the first bypass branch works in conjunction with the second bypass branch to improve the temperature compensation accuracy, thereby achieving high-precision control of the temperature control system. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a temperature control system in the prior art;

[0024] Figure 2 This is a schematic diagram of the structure of a high-precision temperature control system according to a specific embodiment of the present invention.

[0025] The following labels are used in the attached diagram:

[0026] First heat exchanger 1, second heat exchanger 2, inlet A1 of the first bypass branch, outlet B1 of the first bypass branch, inlet A2 of the second bypass branch, outlet B2 of the second bypass branch, first valve 31, second valve 32, first mixer 41, second mixer 42, heat buffer device 5, drive pump 6. Detailed Implementation

[0027] This invention discloses a high-precision temperature control system that eliminates the need for a heater and improves temperature control accuracy.

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a high-precision temperature control system according to a specific embodiment of the present invention.

[0030] In one specific embodiment, the high-precision temperature control system provided by the present invention includes a first heat exchanger 1, a second heat exchanger 2, a first bypass branch, a second bypass branch, a first valve 31, and a second valve 32. The first heat exchanger 1 serves as a terminal heat exchanger for exchanging heat with parts or the environment requiring cooling. The second heat exchanger 2 is used to cool 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 such as cooling water; fluids such as gases can also be used as needed. The first port of the first heat exchanger 1 is connected to the first port of the second heat exchanger 2, and the second port of the second heat exchanger 2 is connected to the first port of the first heat exchanger 1 via the first bypass branch and the second bypass branch. The first interface of the first heat exchanger 1 is the return port of the high-precision temperature control system, and the second interface of the first heat exchanger 1 is the outlet of the temperature control system. The high-precision temperature-controlled heat exchange medium flowing out of the outlet of the high-precision temperature control system is provided to the device that needs to be cooled through the first heat exchanger 1. The heat exchange medium at the return port of the temperature control system exchanges heat with the part or environment that needs to be cooled in the first heat exchanger 1. After absorbing the heat from the part or environment that needs to be cooled, it flows through the second heat exchanger 2 for cooling.

[0031] The inlet A1 of the first bypass branch is connected to the first interface of the first heat exchanger 1, and the outlet B1 of the first bypass branch is connected to the second interface of the second heat exchanger 2, both connecting to the outlet B2 of the second bypass branch. This allows the heat exchange medium from the first bypass branch to mix with the heat exchange medium from the second interface of the second heat exchanger 2 to form a first mixed-temperature heat exchange medium, which is then mixed with the heat exchange medium from the second bypass branch. A first valve 31 is provided in the first bypass branch to regulate the flow rate at the outlet B1. The inlet A2 of the second bypass branch is specifically connected to the outlet of the first valve 3 of the first bypass branch. This means that the heat recovery from the second bypass branch can be diverted from the first bypass branch, allowing a higher-temperature heat exchange medium to be introduced into the first mixed-temperature heat exchange medium for further high-precision temperature regulation. A second valve 32 is provided in the second bypass branch to regulate the flow rate at the outlet B1. The flow rates of the first valve 31 and the second valve 32 are adjusted to regulate the temperatures of the first and second mixed-temperature heat exchange media until the temperature difference between the second mixed-temperature heat exchange media and the preset target heat exchange media is within the range of (-0.1 to 0.1)℃. Specifically, the preset target heat exchange media temperature refers to the target temperature of the second interface of the first heat exchanger 1. Specifically, the temperature of the first mixed-temperature heat exchange media can be adjusted to a temperature difference range of (-0.3 to 0.3)℃ with the preset target heat exchange media via the first bypass branch, and then the temperature difference between the second mixed-temperature heat exchange media and the preset target heat exchange media can be adjusted to a temperature difference range of (-0.1 to 0.1)℃ via the second bypass branch.

[0032] The high-precision temperature control system provided by this invention uses a first bypass branch and a second bypass branch for temperature compensation. Through the first bypass branch, a portion of the high-temperature heat exchange medium from the first interface of the first heat exchanger 1 is transported to the first interface of the second heat exchanger 2, where they are mixed to form a first mixed-temperature heat exchange medium. The flow rate of the first bypass branch is typically small; specifically, the flow rate of the heat exchange medium in the first bypass branch is adjusted by the first valve 31 to achieve high-precision temperature fine-tuning, ensuring that the temperature difference between the first mixed-temperature heat exchange medium and the preset target heat exchange medium is within the range of (-0.3 to 0.3)℃. The adjusted first mixed-temperature heat exchange medium is then mixed with the heat exchange medium from the second bypass branch to form a second mixed-temperature heat exchange medium. Specifically, the flow rate of the heat exchange medium in the second bypass branch is adjusted by the second valve 32. Through the second bypass branch, the temperature of the first mixed-temperature heat exchange medium is further precisely adjusted, thereby improving the temperature control accuracy and ensuring that the temperature difference between the second mixed-temperature heat exchange medium and the preset target heat exchange medium is within the range of (-0.1 to 0.1)℃. In summary, the high-precision temperature control system provided in this application fully utilizes the heat wasted by the high-temperature heat exchange medium in electric heating methods, achieving temperature compensation without the need for a heater, thus reducing overall system losses and contributing to energy conservation. Furthermore, the cooperation between the first and second bypass branches improves the temperature compensation accuracy, thereby achieving high-precision control of the temperature control system. It should be noted that in this embodiment, high precision refers to the required temperature control accuracy deviation being within ±0.1℃ of the target temperature; for example: T±0.01℃, T±0.001℃…

[0033] The first valve 31 is an adjustable valve with an adjustable opening. Its opening can be adjusted manually. In this case, the first valve 31 can be a mechanical valve, and its opening can be slowly adjusted manually. Alternatively, the first valve 31 can be an electronic valve, and its opening can be controlled and adjusted by the system controller. In this embodiment, the first valve 31 is preferably set as an electronic valve, and its opening can be controlled and adjusted by the controller, resulting in higher adjustment accuracy.

[0034] In one embodiment, the high-precision temperature control system further includes a first temperature sensor for detecting the temperature of the first mixed-temperature heat exchange medium. By detecting the temperature of the first mixed-temperature heat exchange medium through the first temperature sensor, a basis can be provided for the flow regulation of the first bypass branch. That is, the opening degree of the first valve 31 is adjusted according to the temperature of the first mixed-temperature heat exchange medium, thereby changing the flow of the first bypass branch and further improving the control accuracy.

[0035] In one embodiment, the high-precision temperature control system further includes a controller. The controller controls the opening degree of the first valve 31 based on the detection value of the first temperature sensor, thereby adjusting the flow rate of the heat exchange medium in the first bypass branch to a value of (0.1~10)% of the flow rate of the heat exchange medium at the second interface of the second heat exchanger 2. By controlling the flow rate of the first bypass branch within this range based on the first temperature sensor, the controller can meet the high-precision requirements of the temperature control system. Since the first bypass branch serves as a temperature compensation adjustment to replace the conventional heater, the lower the flow rate, the higher its relative accuracy.

[0036] In one embodiment, the high-precision temperature control system further includes a second temperature sensor for detecting the temperature of the second mixed-temperature heat exchange medium. By detecting the temperature of the second mixed-temperature heat exchange medium through the second temperature sensor, a basis can be provided for the flow regulation of the second bypass branch. That is, the opening degree of the second valve 32 is adjusted according to the temperature of the second mixed-temperature heat exchange medium, thereby changing the flow of the second bypass branch and further improving the control accuracy.

[0037] In one embodiment, the controller controls the opening of the second valve 32 based on the detection value of the second temperature sensor, thereby adjusting the flow rate of the heat exchange medium in the second bypass branch to a value of (0.1~10)% of the flow rate of the heat exchange medium in the first bypass branch. By controlling the flow rate of the second bypass branch within this range based on the second temperature sensor reading, the controller can meet the high-precision requirements of the temperature control system. The lower the flow rate of the second bypass branch, the higher its relative accuracy.

[0038] Similarly, the second valve 32 is an adjustable valve, which can be manually controlled to adjust its opening. In this case, the second valve 32 can be a mechanical valve, which can be slowly adjusted manually. Alternatively, the second valve 32 can be an electronic valve, which can be controlled and adjusted by the system controller. In this embodiment, the second valve 32 is preferably set as an electronic valve, and its opening is controlled and adjusted by the controller, resulting in higher adjustment accuracy.

[0039] In one embodiment, the high-precision temperature control system further includes a third temperature sensor for detecting the temperature of the heat exchange medium at the second port of the second heat exchanger 2. It is understood that the third temperature sensor should be located before the point where the first bypass branch connects to the second port of the second heat exchanger 2 to allow mixing. By detecting the temperature of the second port of the second heat exchanger 2 using the third temperature sensor, the flow rate of the first bypass branch can be adjusted accordingly based on that temperature; that is, the opening of the first valve 31 is controlled based on the temperature of the heat exchange medium at the second port of the second heat exchanger 2, thereby changing the flow rate in the first bypass branch.

[0040] Furthermore, the controller also controls the opening degree of the first valve 31 based on the detection value of the third temperature sensor. By controlling the opening degree of the first valve 31 based on the detection values ​​of the first and third temperature sensors, the controller further improves the control accuracy and reduces the impact of the temperature fluctuation 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.

[0041] Thus, by using the detection values ​​of the first temperature sensor, the second temperature sensor, the third temperature sensor, and the preset target heat exchange medium temperature, the opening degree of the first valve and the second valve can be precisely controlled, thereby precisely adjusting the flow rate of the heat exchange medium in the first bypass branch and the second bypass branch, and adjusting the temperature of the first mixed-temperature heat exchange medium and the second mixed-temperature heat exchange medium. This achieves a temperature difference range of (-0.3 to 0.3)℃ between the temperature of the first mixed-temperature heat exchange medium and the temperature of the preset target heat exchange medium, until the temperature difference range of (-0.1 to 0.1)℃ is achieved, resulting in higher adjustment accuracy.

[0042] In one embodiment, the high-precision temperature control system further includes a first flow sensor for detecting the flow rate of the working fluid in the first bypass branch. The flow rate of the first bypass branch is fed back through the first flow sensor; that is, feedback adjustment is performed based on the detected flow rate of the first bypass branch to facilitate precise control of the flow rates in both the first and second bypass branches. Furthermore, the controller also controls the opening degree of the first valve 31 and the second valve 32 based on the detection value of the first flow sensor.

[0043] In one embodiment, the high-precision temperature control system further includes a second flow sensor disposed at the first interface of the first heat exchanger 1. The second flow sensor is used to detect the flow rate of the heat exchange medium at the first interface of the first heat exchanger 1. By feeding back the flow rate at the first interface of the first heat exchanger 1 through the second flow sensor, the opening degree of the first valve 31 and the second valve 32 can be controlled according to the detected flow rate value at the first interface of the first heat exchanger 1, thereby changing the flow rate in the first bypass branch and the second bypass branch, so as to facilitate precise control of the flow rate in the first bypass branch and the second bypass branch. Furthermore, the controller also controls the opening degree of the first valve 31 and the second valve 32 according to the detection value of the second flow sensor, thereby accurately controlling the flow rate value of the first bypass branch and the second bypass branch.

[0044] In one embodiment, to ensure the high precision of this high-precision temperature control system, the accuracy of the first temperature sensor and the third temperature sensor is within ±0.3℃, the accuracy of the second temperature sensor is within ±0.1℃, the accuracy of the first valve 31 and the second valve 32 is within 1%, and the accuracy of the first flow sensor and the second flow sensor is within 1%. In this way, this high-precision temperature control system can be applied to a high-precision regulation system to regulate the temperature of equipment with high-precision heat dissipation requirements, meeting the high-precision requirements of the high-precision temperature regulation system for temperature monitoring and valve opening, thus matching the high-precision regulation of the temperature control system.

[0045] In one embodiment, the high-precision temperature control system further includes a fourth temperature sensor or a first pressure sensor for monitoring changes in the load of the first heat exchanger 1, and / or a fifth temperature sensor or a second pressure sensor, wherein the fourth temperature sensor or the first pressure sensor is disposed at the first interface of the first heat exchanger 1, and the fifth temperature sensor or the second pressure sensor is disposed at the second interface of the first heat exchanger 1; by monitoring changes in temperature or pressure at 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 between the parts or environment that need to be cooled by the first heat exchanger 1. When the heat exchange demand of the load increases or decreases, the temperature control temperature of the entire high-precision temperature control system can be adjusted in a timely manner to match the heat exchange demand of the load.

[0046] The opening degree of the first valve 31 and the second valve 32 can be adjusted in a timely manner by means of the temperature detected by the fourth temperature sensor or the pressure detected by the first pressure sensor, or by means of the fifth temperature sensor or the second pressure sensor, thereby realizing the flow regulation of the first bypass branch and the second bypass branch, so that the temperature of the second mixed-temperature heat exchange medium can reach the updated preset target temperature of the heat exchange medium.

[0047] Furthermore, the controller adjusts the preset target heat exchange medium temperature of the second port of the first heat exchanger 1 based on the heat exchange medium temperature or pressure at the second port of the first heat exchanger 1, and / or the heat exchange medium temperature or pressure at the first port of the first heat exchanger 1. Pressure detection can be converted into feedback on the corresponding flow rate. When the load at the terminal changes, after receiving feedback from the fourth temperature sensor or the first pressure sensor, and / or the fifth temperature sensor or the second pressure sensor on changes in the return water temperature or flow rate, the outlet water temperature or flow rate, or the temperature difference or flow rate between the two, the controller adjusts the opening degree of the first valve 31 and the second valve 32 accordingly to achieve precise control.

[0048] In one embodiment, the high-precision temperature control system further includes a first mixer 41 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 to form a first mixed-temperature heat exchange medium, and a second mixer 42 for mixing the heat exchange medium of the second bypass branch with the first mixed-temperature heat exchange medium to form a second mixed-temperature heat exchange medium. Specifically, the outlet B1 of the first bypass branch and the second interface of the second heat exchanger 2 are respectively connected to the inlet of the first mixer 41, the outlet of the first mixer 41 is connected to the inlet of the second mixer 42, and the first bypass branch is connected to the inlet of the second mixer 42, while the outlet of the second mixer 42 is connected to the second interface of the first heat exchanger 1. The first mixer 41 accelerates uniform temperature mixing, improving the efficiency and accuracy of the overall high-precision temperature control system. In other embodiments, the first mixer 41 may not be provided; for example, the outlet B1 of the first bypass branch and the second interface of the second heat exchanger 2 may be connected to the second bypass branch via a main pipe, and the mixture may be formed within the main pipe. Specifically, when a first mixer 41 is provided, a first temperature sensor can be installed at the outlet of the first mixer 41 to detect the temperature of the first mixing heat exchange medium at the outlet of the first mixer 41. The arrangement and function of the second mixer 42 are similar to those of the first mixer 41, and will not be described in detail here.

[0049] In one embodiment, at least one baffle component is provided in each of the first mixer 41 and the second mixer 42, and a gap exists between the baffle component and the inner wall of the corresponding first mixer 41 or second mixer 42. That is, the baffle component is in a semi-closed state. By providing the baffle component, the fluid in the first mixer 41 and the second mixer 42 is guided, and the flow path in the first mixer 41 and the second mixer 42 is extended, resulting in more uniform mixing. Specifically, the baffle component can be a partition.

[0050] In one embodiment, the high-precision temperature control system further includes a heat buffer device 5, which is connected between the second interface of the first heat exchanger 1 and the outlet of the second mixer 42. The heat buffer 5 is used to regulate temperature stability, allowing for further temperature stabilization after high-precision fine-tuning via the second bypass branch, and providing a temperature-stable heat exchange medium to the second interface of the first heat exchanger 1, thus achieving precise control.

[0051] Furthermore, a drive pump 6 is provided between the second mixer 42 and the first mixer 41. By providing the drive pump 6, the flow of the first mixing heat exchange medium is powered.

[0052] In one embodiment, a collection box for storing the first mixed-temperature heat exchange medium is further provided between the second mixer 42 and the first mixer 41. The collection box provides a larger buffer space for the first mixed-temperature heat exchange medium, allowing for better mixing within it and resulting in a more uniform temperature, thereby further improving the accuracy and stability of the high-precision temperature control system.

[0053] In one embodiment, the high-precision temperature control system further includes a third bypass branch connected to both the first and second interfaces of the first heat exchanger 1. The third bypass branch is used to bypass a portion of the working fluid from the first interface of the first heat exchanger 1 to the second interface, and is equipped with a third valve to control its flow rate. The third bypass branch also introduces a second mixed-temperature heat exchange medium into the first interface of the first heat exchanger 1. By providing the third bypass branch, the system's flow rate can be regulated to control the flow rate of the heat exchange medium flowing into the first heat exchanger 1.

[0054] Specifically, the third valve is a three-way valve. The first port of the three-way valve is connected to the first port of the first heat exchanger 1, the second port is connected to the second port of the first heat exchanger 1, and the third port is connected after the outlet of the second bypass branch, such as the outlet of the second mixer 42 or the outlet of the heat buffer device 5. The third port of the three-way valve is connected to the first port and the second port of the three-way valve, respectively.

[0055] In one embodiment, the second heat exchanger 2 is externally connected to at least one of a compressor cooling circuit and a cooling water cooling circuit. The heat exchange medium flowing through the second heat exchanger 2 is cooled by the compressor cooling circuit or the cooling water cooling circuit to a temperature close to that of the outlet. Using a compressor cooling circuit or a cooling water cooling circuit has high cooling efficiency. In other embodiments, the second heat exchanger 2 can also be cooled by a fan or the like.

[0056] In one embodiment, the second heat exchanger 2 is only connected to an external cooling water circuit. The second heat exchanger 2 includes a third interface and a fourth interface that are connected to each other. The third interface is the cooling medium outlet, and the fourth interface is the cooling medium inlet. The heat exchange medium inside the second heat exchanger 2 is cooled by the external cooling medium. Specifically, the third interface can be connected to temperature sensors for detecting the temperature of the cooling medium.

[0057] In one embodiment, the cooling water cooling circuit includes a third heat exchanger, the compressor cooling circuit includes an expansion valve, a bypass valve, and a compressor, and the second heat exchanger 2 includes a third port and a fourth port connected together. The third port is connected to the first port of the third heat exchanger via the expansion valve, and the second port of the third heat exchanger is connected to the fourth port of the second heat exchanger 2 via the compressor. The bypass valve is connected between the first port of the third heat exchanger and the second port of the second heat exchanger 2. The third heat exchanger is externally connected to a cooling medium. The externally connected cooling medium first cools the heat exchange medium inside the third heat exchanger. The initially cooled heat exchange medium is further cooled by the compressor, thereby cooling the heat exchange medium inside the second heat exchanger 2. Specifically, the third heat exchanger includes a third port and a fourth port connected together. The third port is the cooling medium outlet, and the fourth port is the cooling medium inlet. The externally connected cooling medium cools the heat exchange medium inside the third heat exchanger. Specifically, the third port and the fourth port of the third heat exchanger can be connected to temperature sensors for cooling medium temperature detection. The expansion valve and bypass valve in the compressor cooling circuit can be used to prevent the compressor from overheating and to allow hot gas to bypass.

[0058] In other embodiments, a cooling water cooling circuit may not be provided; instead, the heat exchange medium in the second heat exchanger 2 may be cooled solely by a compressor cooling circuit. Specifically, depending on load changes, the cooling water cooling circuit is preferred when it can meet the load requirements. When the cooling water cooling circuit does not meet the load requirements, a compressor cooling circuit may be used alone, or a combination of a compressor cooling circuit and a cooling water cooling circuit may be used, with the compressor cooling circuit supplementing the cooling capacity or temperature difference.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-precision temperature control system, characterized in that, The high-precision temperature control system is applied to equipment with high-precision heat dissipation requirements. It includes a first heat exchanger (1) and a second heat exchanger (2), with the first interface of the first heat exchanger (1) connected to the first interface of the second heat exchanger (2). The first bypass branch has its inlet (A1) connected to the first interface of the first heat exchanger (1) and its outlet (B1) 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 first mixed-temperature heat exchange medium. The second bypass branch has its inlet (A2) connected to the first bypass branch and its outlet (B2) connected to the second interface of the second heat exchanger (2), so that the heat exchange medium of the second bypass branch is mixed with the first mixed-temperature heat exchange medium to form the second mixed-temperature heat exchange medium. The first valve (31) is located in the first bypass branch and can be used to adjust the flow rate of the heat exchange medium in the first bypass branch. The second valve (32) is located in the second bypass branch and can be used to adjust the flow rate of the heat exchange medium in the second bypass branch, so as to adjust the temperature of the first mixed-temperature heat exchange medium and the temperature of the second mixed-temperature heat exchange medium until the temperature difference between the temperature of the second mixed-temperature heat exchange medium and the temperature of the preset target heat exchange medium is within the range of (-0.1~0.1)℃. The controller is used to adjust the opening degree of the first valve (31) and the second valve (32).

2. The high-precision temperature control system according to claim 1, characterized in that, It also includes a first temperature sensor for detecting the temperature of the first mixed-temperature heat exchange medium and a second temperature sensor for detecting the temperature of the second mixed-temperature heat exchange medium. The controller is used to control the opening of the first valve (31) and the second valve (32) according to the detection value of the first temperature sensor and the detection value of the second temperature sensor, 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 (31) and adjust the flow rate of the heat exchange medium in the second bypass branch by controlling the opening of the second valve (32), 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), and the flow rate of the heat exchange medium in the second bypass branch is (0.1~10)% of the flow rate of the heat exchange medium in the first bypass branch.

3. The high-precision temperature control system according to claim 2, characterized in that, It also includes a third temperature sensor for detecting the temperature of the heat exchange medium at the second port of the second heat exchanger (2), and the controller further controls the opening degree of the first valve (31) based on the detection value of the third temperature sensor.

4. The high-precision temperature control system according to claim 3, characterized in that, It also includes a first flow sensor for detecting the flow rate of the heat exchange medium in the first bypass branch, and the controller further controls the opening degree of the first valve (31) and the opening degree of the second valve (32) based on the detection value of the first flow sensor.

5. The high-precision temperature control system according to claim 4, characterized in that, It also includes a second flow sensor disposed at the first interface of the first heat exchanger (1), the second flow sensor being used to detect the flow rate of the heat exchange medium at the first interface of the first heat exchanger (1), and the controller further controlling the opening degree of the first valve (31) and the opening degree of the second valve (32) according to the detection value of the second flow sensor.

6. The high-precision temperature control system according to claim 5, characterized in that, The accuracy of the first temperature sensor and the third temperature sensor is within ±0.3℃, the accuracy of the second temperature sensor is within ±0.1℃, the accuracy of the first valve (31) and the second valve (32) is within 1%, and the accuracy of the first flow sensor and the second flow sensor is within 1%.

7. The high-precision temperature control system according to claim 2, characterized in that, It also includes a fourth temperature sensor or a first pressure sensor for monitoring changes in the load of the first heat exchanger (1), and / or a fifth temperature sensor or a second pressure sensor; The fourth temperature sensor or the first pressure sensor is located at the first interface of the first heat exchanger (1), and the fifth temperature sensor or the second pressure sensor is located at the second interface of the first heat exchanger (1).

8. The high-precision temperature control system according to any one of claims 1-7, characterized in that, It also includes a first mixer (41) 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) to form a first mixed-temperature heat exchange medium, and a second mixer (42) for mixing the heat exchange medium of the second bypass branch with the first mixed-temperature heat exchange medium to form a second mixed-temperature heat exchange medium; both the first mixer (41) and the second mixer (42) are provided with at least one baffle component, and the baffle component has a gap with the inner wall of the first mixer (41) or the second mixer (42).

9. The high-precision temperature control system according to claim 8, characterized in that, It also includes a heat buffer device (5), which is connected between the first heat exchanger (1) and the second mixer (42); a drive pump (6) is provided between the second mixer (42) and the first mixer (41).

10. The high-precision temperature control system according to claim 1, characterized in that, It also includes a third bypass branch connected to the first interface and the second interface of the first heat exchanger (1) respectively. The third bypass branch is 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 third bypass branch is provided with a third valve.

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