Refrigerating system and aging test equipment

Abstract

The utility model relates to a refrigeration system and aging test equipment. The refrigerating system comprises a first refrigerating assembly used for circulating a refrigerant, and the first refrigerating assembly comprises a compressor, a condenser and a heat exchanger which are sequentially connected end to end through a pipeline and form a first circulating loop; the second refrigerating assembly is used for circulating a secondary refrigerant and comprises a refrigerating pipeline, a pump and an evaporator, wherein the pump and the evaporator are mounted on the refrigerating pipeline; the switching assembly comprises a first control pipeline and a second control pipeline, the two ends of the refrigeration pipeline are connected with the heat exchanger through the first control pipeline so that the pump, the evaporator and the heat exchanger can form a second circulation loop, and the two ends of the refrigeration pipeline are connected with the condenser through the second control pipeline. The pump, the evaporator and the condenser form a third circulation loop; the first control pipeline and the second control pipeline are configured to be selectively conducted; and the liquid supply pipeline is used for circulating cooling liquid and is connected with the condenser.

Description

Technical Field

[0001] The present application relates to the technical field of semiconductor manufacturing equipment, and specifically to a refrigeration system and aging test equipment. Background Art

[0002] Chip burn-in testing is a crucial step in the chip manufacturing process, aimed at reducing the potential for early chip failure. Burn-in testing involves placing the chip in a burn-in chamber and applying a bias voltage to simulate the worst-case bias conditions experienced during the chip's lifetime. During burn-in testing, the chip generates heat while powered on, raising the temperature inside the test chamber. To maintain the ambient temperature in the test chamber, equipment must continuously generate cool air to cool the chip.

[0003] Traditionally, aging test equipment primarily uses a vapor-compression refrigeration cycle to generate a low-temperature refrigerant, which then enters the evaporator for heat exchange, thereby controlling the temperature of the test chamber. However, this vapor-compression refrigeration cycle has drawbacks such as high energy consumption and frequent compressor failures. Utility Model Content

[0004] Based on this, it is necessary to provide a refrigeration system and aging test equipment that can reduce energy consumption and compressor failure frequency to address the above problems.

[0005] A refrigeration system comprising:

[0006] A first refrigeration assembly for circulating refrigerant includes a compressor, a condenser, and a heat exchanger connected end to end through a pipeline to form a first circulation loop;

[0007] A second refrigeration assembly for circulating a secondary refrigerant, comprising a refrigeration pipeline and a pump and an evaporator installed on the refrigeration pipeline;

[0008] a switching assembly comprising a first control line and a second control line, wherein both ends of the refrigeration line are connected to the heat exchanger via the first control line, so that the pump, the evaporator, and the heat exchanger form a second circulation loop; and wherein both ends of the refrigeration line are connected to the condenser via the second control line, so that the pump, the evaporator, and the condenser form a third circulation loop; and wherein the first control line and the second control line are configured to be selectively conductive; and

[0009] A liquid supply pipeline for circulating cooling liquid is connected to the condenser.

[0010] In some embodiments, the refrigeration line has a first end and a second end, and the pump is located between the evaporator and the first end;

[0011] The first control pipeline includes a first connecting pipe, a second connecting pipe and a first control valve. The first connecting pipe is connected between the first end and the heat exchanger, and the second connecting pipe is connected between the second end and the heat exchanger. The first control valve is installed on the second connecting pipe to control the on and off of the second connecting pipe.

[0012] In some embodiments, the second control pipeline includes a third connecting pipe, a fourth connecting pipe and a second control valve, the third connecting pipe is connected between the first end and the condenser, the fourth connecting pipe is connected between the second end and the condenser, and the second control valve is installed on the fourth connecting pipe to control the on and off of the fourth connecting pipe.

[0013] In some embodiments, a coolant regulating valve is installed on the liquid supply pipeline, and the coolant regulating valve is used to regulate the flow rate of coolant flowing from the liquid supply pipeline to the condenser.

[0014] In some embodiments, the second refrigeration component further includes a first regulating pipeline and a first regulating valve, one end of the first regulating pipeline is connected to a portion of the refrigeration pipeline located on the refrigerant inlet side of the evaporator, and the other end of the first regulating pipeline is connected to a portion of the refrigeration pipeline located on the refrigerant outflow side of the evaporator, and the first regulating valve is installed on the first regulating pipeline for regulating the refrigerant flow in the first regulating pipeline.

[0015] In some embodiments, the second refrigeration assembly further includes a second regulating pipeline and a second regulating valve, one end of the second regulating pipeline being in communication with a portion of the refrigeration pipeline located on a brine inflow side of the pump, and the other end of the second regulating pipeline being in communication with a portion of the refrigeration pipeline located on a brine outflow side of the pump, the second regulating valve being installed on the second regulating pipeline for regulating the on / off state of the second regulating pipeline;

[0016] In a vertical direction, the condenser is located at a higher position than the evaporator.

[0017] In some embodiments, the second refrigeration assembly further includes a one-way valve installed on the refrigeration pipeline, and the one-way valve is located between the pump and the evaporator.

[0018] In some embodiments, the first refrigeration component further includes a first throttle valve, which is connected in parallel with the compressor in the first circulation loop through a pipeline.

[0019] In some embodiments, the first refrigeration assembly further includes a second throttle valve, which is connected in series in the first circulation loop and is located between the condenser and the heat exchanger.

[0020] An aging test device comprises an aging test device and a refrigeration system as described in any of the above embodiments, wherein the aging test device has an aging test chamber for accommodating a product, and the aging test device is used to perform an aging test on the product accommodated in the aging test chamber;

[0021] The evaporator is arranged in the aging test chamber so that the air in the aging test chamber exchanges heat with the coolant flowing through the evaporator.

[0022] During actual use of the above-mentioned refrigeration system and aging test equipment, when the first control line is connected and the second control line is disconnected, the refrigeration system is in a vapor compression cycle mode. At this time, the first circulation loop is connected, the second circulation loop is also connected, and the third circulation loop is disconnected. In the first circulation loop, the compressor compresses the high-temperature, low-pressure refrigerant flowing out of the heat exchanger into high-temperature, high-pressure refrigerant. The high-temperature, high-pressure refrigerant enters the condenser and is cooled by the coolant in the liquid supply line to become low-temperature refrigerant. The low-temperature refrigerant then enters the heat exchanger, repeating this cycle. At the same time, in the second circulation loop, under the pumping action of the pump, the refrigerant enters the evaporator to exchange heat with the air in the aging test chamber, absorbing heat from the air in the aging test chamber. After absorbing heat, the refrigerant enters the heat exchanger to exchange heat with the low-temperature refrigerant in the first circulation loop, causing the low-temperature refrigerant to cool the refrigerant. The cooled refrigerant then enters the evaporator through the pump, repeating this cycle. That is to say, the coolant in the liquid supply pipeline cools the refrigerant in the first circulation loop in the condenser, the refrigerant in the first circulation loop cools the coolant in the second circulation loop in the heat exchanger, and the coolant in the second circulation loop cools the air in the aging test chamber in the evaporator.

[0023] When the first control line is disconnected and the second control line is connected, the refrigeration system is in the liquid cooling pump circulation mode. At this time, the second circulation loop is disconnected and the third circulation loop is connected, the control compressor stops working, and the first circulation loop stops running. In the third circulation loop, under the pumping action of the pump, the refrigerant enters the evaporator and performs heat exchange with the air in the aging test chamber, that is, absorbs the heat of the air in the aging test chamber. After absorbing the heat, the refrigerant enters the condenser and performs heat exchange with the coolant in the liquid supply line, so that the coolant cools the refrigerant. The cooled refrigerant then enters the evaporator through the pump, and the cycle repeats. In other words, the coolant in the liquid supply line cools the refrigerant in the third circulation loop in the condenser, and the refrigerant in the third circulation loop cools the air in the aging test chamber in the evaporator.

[0024] In this way, when the target temperature is less than T1, the refrigeration system can be controlled to be in the vapor compression circulation mode, thereby using the coolant in the liquid supply line, the refrigerant in the first circulation loop, and the coolant in the second circulation loop to perform three-stage refrigeration, ensuring that the air temperature in the aging test chamber is reduced to the target temperature. When the target temperature is greater than T1 and less than T2, the refrigeration system can be controlled to be in the liquid cooling pump circulation mode, thereby using the coolant in the liquid supply line and the coolant in the third circulation loop to perform two-stage refrigeration, ensuring that the air temperature in the aging test chamber is reduced to the target temperature. In other words, the refrigeration system can selectively switch between the vapor compression circulation mode and the liquid cooling pump circulation mode. When switching to the liquid cooling pump circulation mode, components such as the compressor and heat exchanger on the first circulation loop stop working, which greatly reduces the energy consumption of the refrigeration system and also reduces the failure frequency of components such as the compressor and heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a refrigeration system in one embodiment of the present application;

[0026] Figure 2 Schematic diagram of the structure of an aging test device in one embodiment of the present application. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] See Figure 1 and Figure 2 The present application provides a aging test device, including a aging test apparatus and a refrigeration system. The aging test apparatus includes a aging test chamber 100 for receiving a product, and the aging test apparatus is used to perform an aging test on the product received in the aging test chamber 100. The refrigeration system is used to cool the interior of the aging test chamber 100.

[0034] It should be noted that the aging test equipment further includes a heater 200 disposed in the aging test chamber 100, and the heater 200 is used to heat the aging test chamber 100. Thus, the temperature in the aging test chamber 100 is precisely controlled by the cooperation of the refrigeration system and the heater 200.

[0035] When the temperature in the aging test chamber 100 is higher than the target temperature range, the refrigeration system is used to cool the aging test chamber 100 so that the temperature in the aging test chamber 100 is reduced to the target temperature range; when the temperature in the aging test chamber 100 is lower than the target temperature range, the heater 200 is used to heat the aging test chamber 100 so that the temperature in the aging test chamber 100 is increased to the target temperature range, thereby ensuring that the temperature in the aging test chamber 100 is maintained within the target temperature range, that is, achieving precise control of the temperature in the aging test chamber 100.

[0036] In an embodiment of the present application, the refrigeration system includes a first refrigeration assembly 10 for circulating refrigerant, a second refrigeration assembly 20 for circulating a secondary coolant, a switching assembly 30, and a liquid supply line 40 for circulating a coolant. The first refrigeration assembly 10 includes a compressor 11, a condenser 12, a second throttle valve 13, and a heat exchanger 14, which are connected end-to-end via pipelines to form a first circulation loop. The second refrigeration assembly 20 includes a refrigeration line 21, a pump 22 mounted on the refrigeration line 21, and an evaporator 23. The evaporator 23 is disposed within the aging test chamber 100, so that the secondary coolant in the refrigeration line exchanges heat with the air within the aging test chamber 100 in the evaporator 23, thereby cooling the interior of the aging test chamber 100. The switching assembly 30 includes a first control line 31 and a second control line 32. Both ends of the refrigeration line 21 are connected to the heat exchanger 14 via the first control line 31, so that the pump 22, evaporator 23, and heat exchanger 14 form a second circulation loop. Both ends of the refrigeration line 21 are connected to the condenser 12 via a second control line 32, forming a third circulation loop between the pump 22, the evaporator 23, and the condenser 12. The first and second control lines 31, 32 are configured to selectively conduct. A liquid supply line 40 is connected to the condenser 12, allowing heat exchange between the refrigerant in the first circulation loop and the coolant in the liquid supply line 40 in the condenser 12, or between the brine in the third circulation loop and the coolant in the liquid supply line 40 in the condenser 12.

[0037] In actual use of the above-mentioned refrigeration system, when the first control line 31 is connected and the second control line 32 is disconnected, the refrigeration system is in a vapor compression cycle mode. At this time, the first circulation loop is connected, the second circulation loop is also connected, and the third circulation loop is disconnected. In the first circulation loop, the compressor 11 compresses the high-temperature, low-pressure refrigerant flowing out of the heat exchanger 14 into a high-temperature, high-pressure refrigerant. The high-temperature, high-pressure refrigerant enters the condenser 12 and is cooled by the coolant in the liquid supply line 40 to become a low-temperature, high-pressure refrigerant. The low-temperature, high-pressure refrigerant is then throttled by the second throttle valve 13 to form a low-temperature, low-pressure refrigerant. The low-temperature, low-pressure refrigerant then enters the heat exchanger 14 for heat exchange, and this cycle repeats. At the same time, in the second circulation loop, under the pumping action of the pump 22, the refrigerant enters the evaporator 23 and exchanges heat with the air in the aging test chamber 100, that is, absorbs the heat of the air in the aging test chamber 100. After absorbing the heat, the refrigerant enters the heat exchanger 14 and exchanges heat with the low-temperature refrigerant in the first circulation loop, so that the low-temperature and low-pressure refrigerant cools the refrigerant. The cooled refrigerant then enters the evaporator 23 through the pump 22, and the cycle repeats. In other words, the coolant in the liquid supply line 40 cools the refrigerant in the first circulation loop in the condenser 12, the refrigerant in the first circulation loop cools the refrigerant in the second circulation loop in the heat exchanger 14, and the refrigerant in the second circulation loop cools the air in the aging test chamber in the evaporator 23.

[0038] When the first control line 31 is disconnected and the second control line 32 is connected, the refrigeration system is in the liquid cooling pump circulation mode. At this time, the second circulation loop is disconnected and the third circulation loop is connected, and the compressor 11 is controlled to stop working, so that the first circulation loop stops running. In the third circulation loop, under the pumping action of the pump 22, the refrigerant enters the evaporator 23 and exchanges heat with the air in the aging test chamber 100, that is, absorbs the heat of the air in the aging test chamber 100. After absorbing the heat, the refrigerant enters the condenser 12 and exchanges heat with the coolant in the liquid supply line 40, so that the coolant cools the refrigerant. The cooled refrigerant then enters the evaporator 23 through the pump 22, and the cycle repeats. In other words, the coolant in the liquid supply line 40 cools the refrigerant in the third circulation loop in the condenser 12, and the refrigerant in the third circulation loop cools the air in the aging test chamber in the evaporator 23.

[0039] Thus, when the target temperature is less than T1, the refrigeration system can be controlled to be in a vapor compression cycle mode, thereby utilizing the coolant in the liquid supply line 40, the refrigerant in the first circulation loop, and the coolant in the second circulation loop for three-stage refrigeration, ensuring that the air temperature in the aging test chamber 100 is reduced to the target temperature. When the target temperature is greater than T1 and less than T2, the refrigeration system can be controlled to be in a liquid cooling pump circulation mode, thereby utilizing the coolant in the liquid supply line 40 and the coolant in the third circulation loop for two-stage refrigeration, ensuring that the air temperature in the aging test chamber 100 is reduced to the target temperature. In other words, the refrigeration system can selectively switch between the vapor compression cycle mode and the liquid cooling pump circulation mode. When switching to the liquid cooling pump circulation mode, components such as the compressor 11 and the heat exchanger 14 on the first circulation loop stop working, greatly reducing the energy consumption of the refrigeration system and also reducing the failure frequency of components such as the compressor 11 and the heat exchanger 14.

[0040] It should be noted that the target temperature refers to the temperature of the air after heat exchange with the brine in the evaporator 23. As for the specific values ​​of T1 and T2, they can be set according to actual working conditions and are not particularly limited here.

[0041] In some embodiments, the refrigeration line 21 has a first end 211 and a second end 212, respectively. The pump 22 is located between the evaporator 23 and the first end 211 of the refrigeration line 21. The first control line 31 includes a first connecting pipe 311, a second connecting pipe 312, and a first control valve 313. The first connecting pipe 311 is connected between the first end 211 of the refrigeration line 21 and the heat exchanger 14, and the second connecting pipe 312 is connected between the second end 212 of the refrigeration line 21 and the heat exchanger 14. The first control valve 313 is mounted on the second connecting pipe 312 to control the on / off state of the second connecting pipe 312. In this way, the first end 211 and the second end 212 of the refrigeration pipeline 21 are connected to the heat exchanger 14 via the first connecting pipe 311 and the second connecting pipe 312, respectively. The first control valve 313 is used to control the opening and closing of the second connecting pipe 312. When the refrigeration system needs to switch to the vapor compression cycle mode, the first control valve 313 is controlled to open to connect the second circulation loop; when the refrigeration system needs to switch to the liquid cooling pump circulation mode, the first control valve 313 is controlled to close to disconnect the second circulation loop. It should be noted that the first control valve 313 can be a solenoid ball valve, and of course other types of valves can also be used, as long as they can control the opening and closing of the second connecting pipe 312, and there is no special limitation here.

[0042] Specifically, in this embodiment, the second control line 32 includes a third connecting line 321, a fourth connecting line 322, and a second control valve 323. The third connecting line 321 is connected between the first end 211 of the refrigeration line 21 and the condenser 12, and the fourth connecting line 322 is connected between the second end 212 of the refrigeration line 21 and the condenser 12. The second control valve 323 is mounted on the fourth connecting line 322 to control the on / off state of the fourth connecting line 322. In this way, the first end 211 and the second end 212 of the refrigeration pipeline 21 are connected to the condenser 12 via the third connecting pipe 321 and the fourth connecting pipe 322, respectively, and the second control valve 323 is used to control the opening and closing of the fourth connecting pipe 322. Therefore, when the refrigeration system needs to switch to the vapor compression cycle mode, the first control valve 313 is controlled to open to connect the second circulation loop, and the second control valve 323 is controlled to close to disconnect the third circulation loop; when the refrigeration system needs to switch to the liquid cooling pump circulation mode, the first control valve 313 is controlled to close to disconnect the second circulation loop, and the second control valve 323 is controlled to open to connect the third circulation loop. It should be noted that the second control valve 323 can be an electromagnetic ball valve, and of course other types of valves can also be used, as long as it can control the opening and closing of the fourth connecting pipe 322, and there is no special limitation here.

[0043] In the embodiment of the present application, a coolant regulating valve 41 is installed on the liquid supply line 40. The coolant regulating valve 41 is used to adjust the coolant flow rate from the liquid supply line 40 to the condenser 12. In this way, when the refrigeration system switches to the vapor compression cycle mode, the coolant flow rate from the liquid supply line 40 to the condenser 12 is adjusted by the coolant regulating valve 41, thereby adjusting the heat exchange efficiency between the refrigerant and the coolant in the condenser 12, that is, adjusting the temperature of the refrigerant in the heat exchanger 14. In turn, the temperature of the coolant reaching the evaporator 23 (that is, the liquid supply temperature) is adjusted by the refrigerant, thereby achieving the purpose of accurately adjusting the temperature in the aging test chamber 100.

[0044] It is understood that when the opening of the coolant regulating valve 41 is controlled to increase, the coolant flow rate flowing to the condenser 12 increases, thereby increasing the temperature drop of the refrigerant after heat exchange in the condenser 12, and further increasing the temperature drop of the secondary refrigerant after heat exchange in the heat exchanger 14 (i.e., the supply liquid temperature decreases), and ultimately, the temperature drop of the air after heat exchange in the evaporator 23 also increases. Conversely, when the opening of the coolant regulating valve 41 is controlled to decrease, the coolant flow rate flowing to the condenser 12 decreases, thereby decreasing the temperature drop of the refrigerant after heat exchange in the condenser 12, and further decreasing the temperature drop of the secondary refrigerant after heat exchange in the heat exchanger 14 (i.e., the supply liquid temperature increases), and ultimately, the temperature drop of the air after heat exchange in the evaporator 23 also decreases.

[0045] In this way, in actual use, if the supply liquid temperature is too low, the opening of the coolant regulating valve 41 is controlled to increase to improve the heat exchange efficiency between the coolant and the refrigerant in the condenser 12, thereby increasing the temperature of the refrigerant entering the heat exchanger 14, and then increasing the temperature of the coolant entering the evaporator 23 (i.e., the supply liquid temperature), until the supply liquid temperature rises to a preset temperature range. If the supply liquid temperature is too high, the opening of the coolant regulating valve 41 is controlled to decrease to reduce the heat exchange efficiency between the coolant and the refrigerant in the condenser 12, thereby reducing the temperature of the refrigerant entering the heat exchanger 14, and then reducing the temperature of the coolant entering the evaporator 23 (i.e., the supply liquid temperature), until the supply liquid temperature falls to a preset temperature range. The preset temperature range can be set according to the actual working conditions and is not specifically limited here.

[0046] Specifically in the embodiment, the first refrigeration assembly 10 further includes a first throttle valve 15, which is connected in parallel with the compressor 11 in the first circulation loop via a pipeline. Thus, when the heat exchange capacity of the heat exchanger 14 is low, the first throttle valve 15 is activated, allowing a portion of the refrigerant flowing out of the heat exchanger 14 to enter the compressor 11 for compression before entering the condenser 12, while the other portion is throttled by the first throttle valve 15 before entering the condenser 12, thereby preventing the compressor 11 from operating with liquid. It should be noted that the criterion for determining whether the heat exchange capacity of the heat exchanger 14 is low can be set according to actual conditions. For example, when the suction superheat is less than 8°C or the exhaust superheat is less than 35°C, it is determined that the heat exchange capacity of the heat exchanger 14 is low and the first throttle valve 15 needs to be opened.

[0047] In the embodiment of the present application, the second refrigeration assembly 20 further includes a first regulating line 24 and a first regulating valve 25. One end of the first regulating line 24 is connected to the portion of the refrigeration line 21 located on the coolant inflow side of the evaporator 23, and the other end of the first regulating line 24 is connected to the portion of the refrigeration line 21 located on the coolant outflow side of the evaporator 23. The first regulating valve 25 is mounted on the first regulating line 24 and is used to regulate the coolant flow rate within the first regulating line 24. In this way, a portion of the coolant output by the pump 22 enters the first regulating line 24, thereby bypassing the evaporator 23, while the other portion enters the evaporator 23. Therefore, by regulating the coolant flow rate within the first regulating line 24 through the first regulating valve 25, the coolant pressure (i.e., the liquid supply pressure) entering the evaporator 23 can be adjusted to achieve the purpose of accurately regulating the temperature within the aging test chamber 100.

[0048] In actual use, if the liquid supply pressure is too high, the opening of the first regulating valve 25 is controlled to increase, thereby increasing the flow rate of the brine in the first regulating pipeline 24, thereby reducing the pressure of the brine entering the evaporator 23 (i.e., the liquid supply pressure is reduced) until the liquid supply pressure is reduced to a preset pressure range. If the liquid supply pressure is too low, the opening of the first regulating valve 25 is controlled to decrease, thereby reducing the flow rate of the brine in the first regulating pipeline 24, thereby increasing the pressure of the brine entering the evaporator 23 (i.e., the liquid supply pressure is increased) until the liquid supply pressure increases to a preset pressure range. This preset pressure range can be set according to actual operating conditions and is not limited here.

[0049] Specifically, in this embodiment, the second refrigeration assembly 20 further includes a second regulating line 26 and a second regulating valve 27. One end of the second regulating line 26 communicates with the portion of the refrigeration line 21 located on the brine inflow side of the pump 22, and the other end of the second regulating line 26 communicates with the portion of the refrigeration line 21 located on the brine outflow side of the pump 22. The second regulating valve 27 is mounted on the second regulating line 26 and is used to regulate the on / off state of the second regulating line 26. Vertically, the condenser 12 is located higher than the evaporator 23.

[0050] In this way, when the target temperature is higher than T2 (T2 is greater than the boiling point of the refrigerant), the refrigerant changes from liquid to gas after heat exchange in the evaporator 23. At this time, the gaseous refrigerant can flow downstream to the condenser under the action of its own buoyancy force, and the pump 22 does not need to provide pumping force. At this time, the first control valve 313 can be controlled to close, the second control valve 323 can be controlled to open, the first regulating valve 25 can be controlled to close, the second regulating valve 27 can be controlled to open, and the compressor 11 and the pump 22 can be controlled to stop, so that the refrigeration system switches to the liquid-cooled self-circulation mode. At this time, the refrigerant becomes a gaseous refrigerant after heat exchange in the evaporator 23. The gaseous refrigerant flows upward under the action of the buoyancy force and enters the condenser 12. The gaseous refrigerant becomes a liquid refrigerant after heat exchange with the coolant in the condenser 12. Since the condenser 12 is vertically higher than the evaporator 23, the liquid refrigerant in the condenser 12 can flow downward under the action of its own gravity and pass through the third connecting pipe 321 and the second regulating pipe 26 in turn, and then enter the evaporator 23 for heat exchange, and the cycle repeats.

[0051] It should be noted that the refrigeration system can switch between a vapor compression cycle mode, a liquid cooling pump cycle mode, and a liquid cooling self-circulation mode according to the target temperature. Since the refrigeration effect of the refrigeration system decreases in the vapor compression cycle mode, the liquid cooling pump cycle mode, and the liquid cooling self-circulation mode, when the target temperature is less than T1, the refrigeration system switches to the vapor compression cycle mode, when the target temperature is greater than T1 and less than T2, the refrigeration system switches to the liquid cooling pump cycle mode, and when the target temperature is greater than T2, the refrigeration system switches to the liquid cooling self-circulation mode. In this way, when the refrigeration system switches to the liquid cooling pump cycle mode, components such as the compressor 11 and the heat exchanger 14 on the first circulation loop stop working, and when the refrigeration system switches to the liquid cooling self-circulation mode, components such as the compressor 11, the heat exchanger 14, and the pump 22 stop working, thereby greatly reducing the energy consumption of the refrigeration system and reducing the failure frequency of components such as the compressor 11, the heat exchanger 14, and the pump 22.

[0052] Furthermore, the second refrigeration component 20 also includes a one-way valve 28 installed on the refrigeration pipeline 21, and the one-way valve 28 is located between the pump 22 and the evaporator 23, which is used to allow the refrigerant in the refrigeration pipeline 21 to flow from the pump 22 to the evaporator 23, and prevent the refrigerant in the refrigeration pipeline 21 from flowing from the evaporator 23 to the pump 22, thereby avoiding the gaseous refrigerant from flowing back into the pump 22 when the refrigeration system switches to the liquid-cooled self-circulation mode, thereby ensuring the reliability of the pump 22.

[0053] Furthermore, the second refrigeration assembly 20 also includes a reservoir 29 mounted on the refrigeration line 21, located between the first end 211 of the refrigeration line 21 and the pump 22, for storing brine. Thus, the reservoir 29 replenishes and collects brine in the refrigeration line 21, maintaining a continuous flow of brine and a stable pressure in the second or third circulation loops. Of course, depending on actual needs, the reservoir 29 can also be located elsewhere on the refrigeration line 21, or it can be omitted. This is not a specific limitation.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A refrigeration system, characterized in that: include: A first refrigeration assembly (10) for circulating a refrigerant, comprising a compressor (11), a condenser (12), and a heat exchanger (14) connected end to end via a pipeline to form a first circulation loop; A second refrigeration assembly (20) for circulating a secondary refrigerant, comprising a refrigeration pipeline (21) and a pump (22) and an evaporator (23) installed on the refrigeration pipeline (21); A switching assembly (30) comprises a first control line (31) and a second control line (32), wherein both ends of the refrigeration line (21) are connected to the heat exchanger (14) via the first control line (31), so that the pump (22), the evaporator (23) and the heat exchanger (14) form a second circulation loop, and both ends of the refrigeration line (21) are connected to the condenser (12) via the second control line (32), so that the pump (22), the evaporator (23) and the condenser (12) form a third circulation loop; the first control line (31) and the second control line (32) are configured to be selectively connected; and A liquid supply pipeline (40) for circulating cooling liquid is connected to the condenser (12).

2. The refrigeration system according to claim 1, characterized in that The two ends of the refrigeration pipeline (21) are respectively a first end (211) and a second end (212), and the pump (22) is located between the evaporator (23) and the first end (211); The first control pipeline (31) comprises a first connecting pipe (311), a second connecting pipe (312) and a first control valve (313); the first connecting pipe (311) is connected between the first end (211) and the heat exchanger (14); the second connecting pipe (312) is connected between the second end (212) and the heat exchanger (14); and the first control valve (313) is installed on the second connecting pipe (312) and is used to control the on / off of the second connecting pipe (312).

3. The refrigeration system according to claim 2, characterized in that The second control pipeline (32) comprises a third connecting pipe (321), a fourth connecting pipe (322) and a second control valve (323); the third connecting pipe (321) is connected between the first end (211) and the condenser (12); the fourth connecting pipe (322) is connected between the second end (212) and the condenser (12); and the second control valve (323) is installed on the fourth connecting pipe (322) and is used to control the on / off of the fourth connecting pipe (322).

4. The refrigeration system according to claim 1, wherein: A coolant regulating valve (41) is installed on the liquid supply pipeline (40), and the coolant regulating valve (41) is used to regulate the flow rate of coolant flowing from the liquid supply pipeline (40) to the condenser (12).

5. The refrigeration system according to claim 1, wherein: The second refrigeration component (20) further includes a first regulating pipeline (24) and a first regulating valve (25), one end of the first regulating pipeline (24) being connected to a portion of the refrigeration pipeline (21) located on the coolant inflow side of the evaporator (23), and the other end of the first regulating pipeline (24) being connected to a portion of the refrigeration pipeline (21) located on the coolant outflow side of the evaporator (23), and the first regulating valve (25) being installed on the first regulating pipeline (24) for regulating the coolant flow in the first regulating pipeline (24).

6. The refrigeration system according to claim 1, wherein: The second refrigeration assembly (20) further includes a second regulating pipeline (26) and a second regulating valve (27), one end of the second regulating pipeline (26) being in communication with a portion of the refrigeration pipeline (21) located on a coolant inflow side of the pump (22), and the other end of the second regulating pipeline (26) being in communication with a portion of the refrigeration pipeline (21) located on a coolant outflow side of the pump (22), and the second regulating valve (27) being installed on the second regulating pipeline (26) for regulating the on / off state of the second regulating pipeline (26); In the vertical direction, the position of the condenser (12) is higher than the position of the evaporator (23).

7. The refrigeration system according to claim 1, wherein: The second refrigeration assembly (20) further comprises a one-way valve (28) installed on the refrigeration pipeline (21), wherein the one-way valve (28) is located between the pump (22) and the evaporator (23).

8. The refrigeration system according to claim 1, wherein: The first refrigeration component (10) further comprises a first throttle valve (15), and the first throttle valve (15) is connected in parallel with the compressor (11) in the first circulation loop through a pipeline.

9. The refrigeration system according to claim 1, wherein: The first refrigeration assembly (10) further includes a second throttle valve (13), which is connected in series in the first circulation loop and is located between the condenser (12) and the heat exchanger (14).

10. An aging test device, characterized in that: The refrigeration system comprises an aging test device and the refrigeration system according to any one of claims 1 to 9, wherein the aging test device has an aging test chamber (100) for accommodating a product, and the aging test device is used to perform an aging test on the product accommodated in the aging test chamber (100); The evaporator (23) is arranged in the aging test chamber (100) so that the air in the aging test chamber (100) exchanges heat with the coolant flowing through the evaporator (23).

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