CN220250779U - Heat exchange system and sorting test equipment - Google Patents

Abstract

The utility model relates to a heat exchange system and sorting test equipment, comprising: the heat exchange mechanism comprises a heat exchanger, wherein the heat exchanger is used for exchanging heat with a piece to be detected so as to control the temperature of the piece to be detected; the liquid storage mechanism is provided with an exhaust port capable of being opened and closed; and the blowing mechanism is communicated with the heat exchange mechanism and is used for blowing air to the heat exchange mechanism. Compared with the prior art, the heat exchange medium can be guided back to the liquid storage mechanism by disassembling the pipeline, the heat exchange medium in the heat exchange mechanism can be guided to the liquid storage mechanism for storage without disassembling the pipeline, the operation is simple, the time and the labor are saved, the tightness of the pipeline is ensured, the volatilization of the heat exchange medium is not easy to cause, and the waste of the heat exchange medium is avoided.

Description

Heat exchange system and sorting test equipment

Technical Field

The utility model relates to the technical field of temperature control, in particular to a heat exchange system and sorting test equipment.

Background

With the continuous development of integrated circuits, the application fields of the integrated circuits are also increasing. Some special fields, such as automotive electronics, avionics, military electronics, etc., have raised requirements for reliability and stability of electronic components at various ambient temperatures. When high and low temperature testing is performed on electronic components, a high and low temperature testing environment needs to be built. Specifically, the heat exchange medium circularly flows in the heat exchange mechanism and exchanges heat with the electronic components through the heat exchanger, so that the temperature of the electronic components is controlled.

In general, heat exchange media are expensive and some of them are extremely volatile. The temperature difference between the high temperature environment and the low temperature environment created by the heat exchange mechanism is large, so that in many situations, the heat exchange medium in the heat exchange mechanism needs to be led back to the liquid storage mechanism for storage.

In some techniques, the heat exchange medium is often directed back into the reservoir mechanism by removing the drain. The operation mode has complex procedures, can not ensure the tightness of the pipeline, and is easy to volatilize heat exchange media, so that the heat exchange media are wasted.

Disclosure of Invention

Based on the above, it is necessary to provide a heat exchange system and a sorting test device which are simple to operate and not easy to cause waste of heat exchange medium, aiming at the problems that the process is complicated and waste of heat exchange medium is easy to cause by adopting a liquid discharging disassembling mode.

A heat exchange system, comprising:

the heat exchange mechanism comprises a heat exchanger, wherein the heat exchanger is used for exchanging heat with a piece to be detected so as to control the temperature of the piece to be detected; the liquid storage mechanism is provided with an exhaust port capable of being opened and closed;

and the blowing mechanism is communicated with the heat exchange mechanism and is used for blowing air to the heat exchange mechanism.

In one embodiment, the heat exchange system has a purge state and a dwell state; when the heat exchange system is in the purging state, the exhaust port is opened, and the blowing mechanism blows air to the heat exchange mechanism, so that a heat exchange medium in the heat exchange mechanism flows to the liquid storage mechanism for storage; when the heat exchange system is in the pressure maintaining state, the air outlet is closed, and the air blowing mechanism blows air to the heat exchange mechanism, so that the pressure in the closed loop reaches a preset value.

In one embodiment, the air blowing mechanism comprises an air blowing pipeline and a first control valve, wherein the air blowing pipeline is communicated with the heat exchange mechanism, and the first control valve is arranged on the air blowing pipeline and used for controlling the on-off of the air blowing pipeline.

In one embodiment, the blowing mechanism further comprises a pressure control valve arranged on the blowing pipeline for controlling the pressure of the gas in the blowing pipeline flowing to the heat exchange mechanism; and/or

The air blowing mechanism further comprises a first one-way valve which is arranged on the air blowing pipeline to allow the air in the air blowing pipeline to positively flow into the heat exchange mechanism; and/or

The air blowing mechanism further comprises an air source, and the air source is communicated with the air blowing pipeline and is used for supplying air into the air blowing pipeline.

In one embodiment, the heat exchange mechanism further comprises a first pipeline and a second pipeline, wherein the first pipeline is communicated between the liquid storage mechanism and the input end of the heat exchanger, and the second pipeline is communicated between the liquid storage mechanism and the output end of the heat exchanger;

the blowing mechanism is communicated with the first pipeline or the second pipeline.

In one embodiment, the heat exchange system further comprises a second control valve, wherein the second control valve is arranged on a pipeline communicated with the air blowing mechanism, and the second control valve is positioned between a connection point of the pipeline communicated with the air blowing mechanism and the liquid storage mechanism; the second control valve is used for controlling the on-off of the part of the pipeline between the connecting point and the liquid storage mechanism.

In one embodiment, the heat exchange system further comprises a branch, which is communicated between the heat exchange mechanism and the liquid storage mechanism; the blowing mechanism can blow the heat exchange medium in the heat exchange mechanism into the branch and flow to the liquid storage mechanism for storage through the branch.

In one embodiment, the heat exchange mechanism further comprises a first pipeline and a second pipeline, wherein the first pipeline is communicated between the liquid storage mechanism and the input end of the heat exchanger, and the second pipeline is communicated between the liquid storage mechanism and the output end of the heat exchanger; a second one-way valve is arranged on the first pipeline and allows the heat exchange medium in the liquid storage mechanism to flow to the heat exchanger through the first pipeline; the air blowing mechanism is communicated with the second pipeline;

the branch is communicated between the first pipeline and the liquid storage mechanism, and a communication point of the branch and the first pipeline is positioned between the second one-way valve and the heat exchanger.

In one embodiment, the heat exchange system further comprises a third one-way valve provided on the branch to allow the heat exchange medium in the heat exchange mechanism to flow to the liquid storage mechanism for storage via the branch.

In one embodiment, the heat exchange system further comprises an exhaust valve mounted on the liquid storage mechanism, wherein the exhaust valve is used for opening and closing the exhaust port.

A sort test apparatus comprising a heat exchange system as claimed in any one of the preceding claims.

According to the heat exchange system and the sorting test equipment, when the heat exchange medium in the heat exchange mechanism is required to be led back to the liquid storage mechanism for storage, the air outlet of the liquid storage mechanism is controlled to be opened, the air blowing mechanism blows air into the heat exchange mechanism, and because the air outlet is communicated with the outside, air flows from the heat exchange mechanism to the liquid storage mechanism, and the heat exchange medium in the heat exchange mechanism is driven to flow into the liquid storage mechanism in the air flowing process, so that the heat exchange medium in the heat exchange mechanism is finally stored into the liquid storage mechanism for storage. Compared with the prior art, the heat exchange medium can be guided back to the liquid storage mechanism by disassembling the pipeline, the heat exchange medium in the heat exchange mechanism can be guided to the liquid storage mechanism for storage without disassembling the pipeline, the operation is simple, the time and the labor are saved, the tightness of the pipeline is ensured, the volatilization of the heat exchange medium is not easy to cause, and the waste of the heat exchange medium is avoided. When the exhaust port of the liquid storage mechanism is controlled to be closed, the air blowing mechanism blows air into the heat exchange mechanism, so that the pressure in the closed loop can reach a preset value. And after a certain time, observing the pressure drop condition in the closed loop, and judging whether leakage occurs in the closed loop. That is, the heat exchange system provided by the embodiment of the application not only can store heat exchange media, but also can perform pressure maintaining operation to judge whether leakage risk exists, so that the operation reliability of the heat exchange system is improved.

Drawings

FIG. 1 is a schematic diagram of a heat exchange system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a heat exchange system according to another embodiment of the present disclosure (the heat exchange system in FIG. 2 omits a refrigeration mechanism and a coolant circuit);

FIG. 3 is a schematic diagram of a heat exchange system according to another embodiment of the present disclosure (the heat exchange system in FIG. 2 omits a refrigeration mechanism and a coolant circuit);

fig. 4 is a schematic diagram of a heat exchange system according to another embodiment of the present disclosure (the heat exchange system in fig. 2 omits a refrigeration mechanism and a coolant circuit).

Reference numerals illustrate:

100. a heat exchange system; 10. a heat exchange mechanism; 11. a heat exchanger; 12. a first pipeline; 13. a second pipeline; 20. a liquid storage mechanism; 21. an exhaust port; 22. a first liquid filling port; 23. a second liquid adding port; 30. an exhaust valve; 40. an air blowing mechanism; 41. a blowing pipeline; 42. a first control valve; 43. a pressure control valve; 44. a first one-way valve; 45. a gas source; 50. a circulation pump; 60. a first bypass mechanism; 61. a first bypass line; 62. a fourth one-way valve; 63. a first ball valve; 70. a second bypass mechanism; 71. a second bypass line; 72. a fifth check valve; 73. a second ball valve; 74. a third control valve; 80. a refrigeration mechanism; 81. a high temperature stage refrigeration module; 811. a first compressor; 812. a first condenser; 813. a first throttle valve; 814. an evaporative condenser; 82. a low temperature stage refrigeration module; 821. a second compressor; 822. a second throttle valve; 823. an evaporator; 824. a second condenser; 825. a regenerator; 826. a first communication pipe; 827. a second communicating pipe; 90. a coolant circuit; 110. a heating mechanism; 120. a liquid adding electromagnetic valve; 130. a second control valve; 140. a branch; 150. a second one-way valve; 160. a third one-way valve; 170. a pressure sensor.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As described in the background: when the heat exchange medium is required to be led back to the liquid storage mechanism for storage, the traditional operation mode has complex procedures and easily causes waste of the heat exchange medium.

The applicant has found that the root cause of the above problems is: when the heat exchange medium is guided back to the liquid storage mechanism for storage in a liquid discharging disassembling mode, the pipeline of the heat exchange mechanism is required to be disassembled, an operable end is formed at the disassembling position, and the heat exchange medium in the pipeline and the heat exchanger of the heat exchange mechanism is guided to the liquid storage mechanism for storage through the operable end. When the drainage is completed, the pipeline is required to be reconnected for the next use. Therefore, the whole process is complex, and meanwhile, the tightness of a pipeline cannot be guaranteed in the liquid guide process, and the volatilization of a heat exchange medium is easy to cause, so that the waste of the heat exchange medium is caused.

In order to solve the above-mentioned problems, referring to fig. 1, the present application provides a heat exchange system 100 for creating a high-low temperature test environment to control the temperature of a workpiece to be tested. Specifically, the part to be measured is an electronic component. Of course, in other embodiments, the type of the device under test is not limited.

The heat exchange system 100 includes a heat exchange mechanism 10 and a liquid storage mechanism 20, and the heat exchange mechanism 10 and the liquid storage mechanism 20 are connected to each other to form a closed circuit. The heat exchange mechanism 10 comprises a heat exchanger 11, and the heat exchanger 11 is used for exchanging heat with the to-be-measured piece. In this way, when the heat exchange medium circulates in the closed loop, heat exchange can be performed between the heat exchanger 11 and the workpiece to be tested, so as to control the temperature of the workpiece to be tested. Specifically, the heat exchanger 11 includes piping and flow channels to facilitate the flow of the heat exchange medium in the heat exchanger 11.

In some embodiments, the reservoir mechanism 20 is a reservoir. In other embodiments, the type of the liquid storage mechanism 20 is not limited. Specifically, the liquid storage mechanism 20 has an exhaust port 21 that can be opened and closed. When the exhaust port 21 is opened, the gas in the closed circuit can be discharged to the outside through the exhaust port 21; when the exhaust port 21 is closed, the closed circuit forms a closed space in which the gas cannot be exhausted to the outside. Specifically, the heat exchange system 100 further includes an exhaust valve 30 mounted on the liquid storage mechanism 20, and the exhaust valve 30 is used to open and close the exhaust port 21.

The heat exchange system 100 further comprises a blowing mechanism 40, the blowing mechanism 40 being in communication with the heat exchange mechanism 10 for blowing air towards the heat exchange mechanism 10. Specifically, the gas blown by the blowing mechanism 40 toward the heat exchange mechanism 10 is compressed air. Of course, in other embodiments, the type of the gas blown by the blowing mechanism 40 to the heat exchange mechanism 10 is not limited, as long as the gas does not affect the heat exchange effect of the heat exchange medium.

According to the heat exchange system 100 provided by the embodiment of the application, when the heat exchange medium in the heat exchange mechanism 10 needs to be led back to the liquid storage mechanism 20 for storage, the air outlet 21 of the liquid storage mechanism 20 is controlled to be opened, the air blowing mechanism 40 blows air into the heat exchange mechanism 10, and as the air outlet 21 is communicated with the outside, air flows from the heat exchange mechanism 10 to the liquid storage mechanism 20, and the heat exchange medium in the heat exchange mechanism 10 is driven to flow into the liquid storage mechanism 20 in the air flowing process, so that the heat exchange medium in the heat exchange mechanism 10 is finally stored into the liquid storage mechanism 20 for storage. Compared with the prior art, the heat exchange medium can be guided back to the liquid storage mechanism 20 by disassembling the pipeline, the heat exchange medium in the heat exchange mechanism 10 can be guided to the liquid storage mechanism 20 for storage without disassembling the pipeline, the operation is simple, the time and the labor are saved, the tightness of the pipeline is ensured, the volatilization of the heat exchange medium is not easy to cause, and the waste of the heat exchange medium is avoided. When the exhaust port 21 of the liquid storage mechanism 20 is controlled to be closed, the air blowing mechanism 40 blows air into the heat exchange mechanism 10, so that the pressure in the closed circuit can reach a preset value. And after a certain time, observing the pressure drop condition in the closed loop, and judging whether leakage occurs in the closed loop. That is, the heat exchange system 100 provided in the embodiment of the present application not only can store the heat exchange medium, but also can perform pressure maintaining operation to determine whether the heat exchange medium has a leakage risk, thereby increasing the operation reliability of the heat exchange system 100.

In some embodiments, the heat exchange system 100 has a purge state and a dwell state. When the heat exchange system 100 is in the purge state, the air outlet 21 is opened, and the air blowing mechanism 40 blows air to the heat exchange mechanism 10 so that the heat exchange medium in the heat exchange mechanism 10 flows to the liquid storage mechanism 20 for storage. When the heat exchange system 100 is in a pressure maintaining state, the air outlet 21 is closed, and the air blowing mechanism 40 blows air to the heat exchange mechanism 10 so that the pressure in the closed circuit reaches a preset value. That is, the heat exchange medium in the heat exchange mechanism 10 can be guided to the liquid storage mechanism 20 for storage in the purge state of the heat exchange system 100; the heat exchange system 100 can make the pressure in the closed circuit reach a preset value when the pressure is maintained, so as to determine whether the closed circuit leaks. Specifically, a pressure sensor 170 is disposed on the closed loop, and the pressure sensor 170 can detect the pressure of the closed loop to determine whether there is a leakage problem in the closed loop.

Referring to fig. 2-4, the heat exchange mechanism 10 further includes a first pipeline 12 and a second pipeline 13, the first pipeline 12 is connected between the liquid storage mechanism 20 and the input end of the heat exchanger 11, and the second pipeline 13 is connected between the liquid storage mechanism 20 and the output end of the heat exchanger 11. Wherein the blowing mechanism 40 communicates with the first pipe 12 or the second pipe 13. In this way, the blowing means 40 can first blow gas towards the line connected thereto, through which line the gas flows to the heat exchanger 11 and finally from the heat exchanger 11 to the reservoir means 20 through the other line, so that the heat exchange medium is finally stored in the reservoir means 20.

Specifically, the heat exchange system 100 further includes a circulation pump 50, and the circulation pump 50 is provided on the first pipe 12 or the second pipe 13 to enable circulation of the heat exchange medium in a closed circuit.

Further, with continued reference to FIG. 1, the heat exchange system 100 also includes a first bypass mechanism 60 and a second bypass mechanism 70. The first bypass mechanism 60 includes a first bypass line 61, a fourth check valve 62 and a first ball valve 63, the first bypass line 61 connects the first line 12 and the second line 13, the fourth check valve 62 and the first ball valve 63 are both disposed on the first bypass line 61, the fourth check valve 62 allows the heat exchange medium to flow unidirectionally from the first line 12 to the second line 13 through the first bypass line 61, and the first ball valve 63 is used for flow regulation and control of the heat exchange medium in the first bypass line 61. The second bypass mechanism 70 includes a second bypass pipeline 71, a fifth one-way valve 72, a second ball valve 73 and a third control valve 74, the second bypass pipeline 71 is communicated with the first pipeline 12 and the second pipeline 13, the fifth one-way valve 72, the second ball valve 73 and the third control valve 74 are all arranged on the second bypass pipeline 71, the fifth one-way valve 72 allows the heat exchange medium to flow unidirectionally into the second pipeline 13 through the second bypass pipeline 71, the second ball valve 73 is used for adjusting and controlling the flow of the heat exchange medium in the second bypass pipeline 71, and the third control valve 74 is used for controlling the on-off of the second bypass pipeline 71. Specifically, the first bypass mechanism 60 is normally open regardless of the operating condition (high temperature or low temperature) of the heat exchange system 100, and the second bypass mechanism 70 is open when the heat exchange system 100 is in high temperature.

Here, by providing the first bypass mechanism 60 and the second bypass mechanism 70, the flow rate of the heat exchange medium supplied to the heat exchanger 11 can be adjusted within a certain range.

In some embodiments, the heat exchange system 100 further includes a refrigeration mechanism 80, and in particular, the refrigeration mechanism 80 is a two-stage cascade refrigeration mechanism. The refrigeration mechanism 80 includes a high-temperature-stage refrigeration module 81 and a low-temperature-stage refrigeration module 82. The high-temperature-stage refrigeration module 81 includes a first compressor 811, a first condenser 812, a first throttle valve 813, and an evaporation condenser 814, and the low-temperature-stage refrigeration module 82 includes a second compressor 821, an evaporation condenser 814, a second throttle valve 822, and an evaporator 823. Wherein the high temperature stage refrigeration module 81 is thermally coupled to the low temperature stage refrigeration module 82 through the evaporative condenser 814 and the closed loop is thermally coupled to the low temperature stage refrigeration module 82 through the evaporator 823.

Here, the thermal coupling of the high-temperature-stage refrigeration module 81 and the low-temperature-stage refrigeration module 82 through the evaporation condenser 814 means that: the high-temperature-stage refrigeration module 81 and the low-temperature-stage refrigeration module 82 are connected through the evaporation condenser 814 and exchange heat. The closed loop thermally coupled to the low temperature stage refrigeration module 82 means: the closed circuit is connected to the low temperature stage refrigeration module 82 through the evaporator 823 and exchanges heat.

When the refrigeration mechanism 80 is in operation, the high-temperature low-pressure refrigerant gas output from the output end of the evaporation condenser 814 is sucked into the first compressor 811, compressed into high-temperature high-pressure refrigerant gas through compression work, and discharged from the discharge end of the first compressor 811 to the first condenser 812. When passing through the first condenser 812, the refrigerant is condensed into medium-temperature high-pressure refrigerant liquid by the first condenser 812, and the first throttle valve 813 is expanded and depressurized into low-temperature low-pressure refrigerant liquid, and finally enters the evaporation condenser 814 again from the input end of the evaporation condenser 814. When the low-temperature low-pressure liquid refrigerant enters the evaporation condenser 814, heat exchange can be performed between the low-temperature low-pressure liquid refrigerant and the low-temperature-stage refrigeration module 82, and the refrigerant after heat exchange enters the first compressor 811 again from the output end of the evaporation condenser 814, so that the refrigerant is circulated and reciprocated. Meanwhile, the high-temperature low-pressure refrigerant gas output from the output end of the evaporator 823 is sucked into the second compressor 821, compressed into high-temperature high-pressure refrigerant gas through compression work, and discharged to the evaporation condenser 814 from the discharge end of the second compressor 821. When passing through the evaporator-condenser 814, the refrigerant is condensed into medium-temperature high-pressure refrigerant liquid by the evaporator-condenser 814, and expanded and depressurized into low-temperature low-pressure refrigerant liquid by the second throttle valve 822, and finally enters the evaporator 823 again from the input end of the evaporator 823. When the low-temperature low-pressure liquid refrigerant enters the evaporator 823, heat exchange can be performed with the closed loop. The refrigerant after heat exchange enters the second compressor 821 again from the output end of the evaporator 823, and thus circulates and reciprocates.

Through the cooperation of the high-temperature-level refrigeration module 81 and the low-temperature-level refrigeration module 82, the actual temperature of the refrigerant flowing to the input end of the evaporator 823 reaches the target temperature, and exchanges heat with the closed loop in the evaporator 823, so that the temperature of the heat exchange medium in the closed loop is in a set value, and the temperature requirement of the to-be-detected piece under the low-temperature working condition is met.

It is contemplated that in other embodiments, the refrigeration mechanism 80 may omit the high temperature stage refrigeration module 81 or include more refrigeration modules, and is not limited in this regard.

Further, the refrigeration mechanism 80 includes a heat dissipating assembly for dissipating heat from the first condenser 812. Specifically, the heat dissipation mechanism is a coolant loop 90, and the coolant loop 90 is thermally coupled to the high-temperature stage refrigeration module 81 through a first condenser 812.

It should be noted that, the thermal coupling of the coolant circuit 90 and the high-temperature-stage refrigeration module 81 means: the coolant loop 90 is connected to the high temperature stage refrigeration module 81 through a first condenser 812 for heat exchange. That is, the coolant circuit 90 can be used to dissipate heat from the first condenser 812.

It is contemplated that in other embodiments, the heat dissipating assembly is not limited, as the heat dissipating assembly may also be a fan.

In one embodiment, the coolant flowing in the coolant circuit 90 is cooling water. In another embodiment, the type of coolant flowing in the coolant circuit 90 is not limited.

Specifically, the coolant circuit 90 is capable of providing coolant at a constant temperature and flow rate. If the coolant flowing in the coolant circuit 90 is cooling water, the coolant circuit 90 includes a chiller that can provide cooling water to the coolant circuit 90 at a constant temperature and flow rate for heat rejection by the first condenser 812.

Further, the low temperature stage refrigeration module 82 further includes a second condenser 824, the second condenser 824 being disposed between the second compressor 821 and the evaporative condenser 814, the coolant loop 90 being thermally coupled to the low temperature stage refrigeration module 82 via the second condenser 824. That is, the coolant in the coolant loop 90 can exchange heat with the coolant in the low-temperature-stage refrigeration module 82 through the second condenser 824 to cool the coolant, and the cooled coolant flows to the evaporation condenser 814 for secondary cooling.

Still further, the low-temperature-stage refrigeration module 82 further includes a regenerator 825, a first communication pipe 826 and a second communication pipe 827, the first communication pipe 826 is communicated between the evaporative condenser 814 and the second throttle valve 822, the second communication pipe 827 is communicated between the output end of the evaporator 823 and the input end of the second compressor 821, and the first communication pipe 826 and the second communication pipe 827 are thermally coupled through the regenerator 825. In this way, the temperature of the refrigerant condensed by the evaporator-condenser 814 can be reduced as well as the return air temperature of the second compressor 821 can be increased.

In some embodiments, the heat exchange system 100 further includes a heating mechanism 110, where the heating mechanism 110 is configured to heat a heat exchange medium flowing in the closed loop to meet the high temperature operating requirement. Specifically, the heating mechanism 110 includes an electrothermal tube, which can heat the heat exchange medium flowing in the first pipeline 12 and the second pipeline 13, so as to further ensure that the temperature of the heat exchange medium in the whole closed loop is at a set value.

In one embodiment, the electrical heating tube is positioned adjacent to the reservoir 20 such that the electrical heating tube heats the heat transfer medium flowing from the reservoir 20 to the first conduit 12 and heats the heat transfer medium flowing from the second conduit 13 to the reservoir 20. Of course, in other embodiments, the position where the electrothermal tube is disposed is not limited.

It should be noted that, when the heat exchange system 100 is in the purge state and the pressure maintaining state, both the cooling mechanism 80 and the heating mechanism 110 are in the shutdown state, and the cooling mechanism 80 and the heating mechanism 110 only start to operate when the heat exchange system 100 is in the normal operating state.

In some embodiments, the reservoir 20 has a fill port, thus facilitating the addition of a heat exchange medium to the reservoir 20. The liquid storage mechanism 20 is internally provided with a liquid level meter for detecting the liquid level of the heat exchange medium in the liquid storage mechanism 20 so as to judge whether the heat exchange medium needs to be added into the liquid storage mechanism 20. The liquid storage mechanism 20 has a first liquid filling port and a second liquid filling port 23. The liquid storage mechanism 20 is provided with a sealing cover, the sealing cover is arranged at the first liquid adding opening 22, and the sealing cover can be manually opened to add liquid from the first liquid adding opening 22. The heat exchange system 100 further includes a charging solenoid valve 120, where the charging solenoid valve 120 is used to control the opening and closing of the second charging port 23, and the charging solenoid valve 120 is controlled by the control mechanism, so that the external charging mechanism is convenient to automatically charge the liquid into the liquid storage mechanism 20.

In some embodiments, the heat exchange system 100 further includes a second control valve 130, the second control valve 130 being disposed on a line in communication with the blowing mechanism 40, and the second control valve 130 being located between a connection point of the line with which the blowing mechanism 40 communicates and the liquid storage mechanism 20. The second control valve 130 is used for controlling the on-off of the part of the pipeline between the connection point and the liquid storage mechanism 20. In this way, when the heat exchange system 100 is in a normal working state and the heat exchange system 100 is in a pressure maintaining state, the second control valve 130 is opened, and when the heat exchange system 100 is in a purging state, the second control valve 130 is closed, the air blowing mechanism 40 blows air into the heat exchange mechanism 10, and because the second control valve 130 is closed, air flows towards the heat exchanger 11 and drives the heat exchange medium to flow from the heat exchanger 11 to another pipeline and then to be stored in the liquid storage mechanism 20, so that the effect of guiding the heat exchange medium to the liquid storage mechanism 20 is ensured.

In one embodiment, the air blowing mechanism 40 is in communication with the second pipeline 13, and the second control valve 130 is disposed between the connection point of the air blowing mechanism 40 and the second pipeline 13 and the liquid storage mechanism 20. When the heat exchange system 100 is in the purge state, the gas is blown to the second pipeline 13 through the blowing mechanism 40, the heat exchange medium flows to the heat exchanger 11 through the second pipeline 13, then flows to the first pipeline 12 from the heat exchanger 11, finally flows to the liquid storage mechanism 20 from the first pipeline 12 for storage, and finally the gas is discharged from the air outlet 21 of the liquid storage mechanism 20. In another embodiment, the air blowing mechanism 40 is in communication with the first pipeline 12, and the second control valve 130 is disposed between the connection point of the air blowing mechanism 40 and the first pipeline 12 and the liquid storage mechanism 20. When the heat exchange system 100 is in the purge state, the gas is blown to the first pipeline 12 through the blowing mechanism 40, the heat exchange medium flows to the heat exchanger 11 through the first pipeline 12, then flows to the second pipeline 13 from the heat exchanger 11, finally flows to the liquid storage mechanism 20 from the second pipeline 13 for storage, and the gas is finally discharged from the air outlet 21 of the liquid storage mechanism 20.

Further, the heat exchange system 100 further includes a branch 140, where the branch 140 is connected between the heat exchange mechanism 10 and the heat exchange mechanism 10, and the air blowing mechanism 40 can blow the heat exchange medium in the heat exchange mechanism 10 into the branch 140, and flow to the liquid storage mechanism 20 through the branch 140 for storage.

In one embodiment, the heat exchange system 100 further includes a second check valve 150, where the second check valve 150 is disposed on the first pipeline 12 and located between the liquid storage mechanism 20 and the heating mechanism 110, so as to prevent the heat exchange medium flowing out of the liquid storage mechanism 20 from flowing back into the liquid storage mechanism 20. The air blowing mechanism 40 is communicated with the second pipeline 13, the branch 140 is communicated between the first pipeline 12 and the liquid storage mechanism 20, and a communication point of the branch 140 and the first pipeline 12 is positioned between the second one-way valve 150 and the heat exchanger 11. Thus, when the heat exchange system 100 is in the purging state, the gas is blown to the second pipeline 13 by the blowing mechanism 40, the heat exchange medium flows to the heat exchanger 11 through the second pipeline 13, flows from the heat exchanger 11 to the first pipeline 12, finally flows to the branch 140 through the first pipeline 12, and flows to the liquid storage mechanism 20 for storage.

Specifically, the circulation pump 50 is located between the heating mechanism 110 and the heat exchanger 11. Referring to fig. 1, in some embodiments, the point of communication between the branch 140 and the first conduit 12 is located between the heating mechanism 110 and the circulation pump 50. Referring to fig. 2, in other embodiments, the communication point between the branch 140 and the first pipeline 12 is located between the second check valve 150 and the heating mechanism 110. Referring to fig. 3 and 4, in still other embodiments, the branch 140 is connected between the circulating pump 50 and the heat exchanger 11 of the first pipeline 12. Here, the positions of the communication points in fig. 3 and 4 are slightly different, and the positions of the communication points in fig. 3 are far from the heat exchanger relative to the positions of the communication points in fig. 4.

Further, the heat exchange system 100 further includes a third check valve 160, where the third check valve 160 is disposed on the branch 140 to allow the heat exchange medium in the first pipeline 12 to flow to the liquid storage mechanism 20 through the branch 140 for storage, so as to avoid backflow of the heat exchange medium in the liquid storage mechanism 20 from the branch 140 into the first pipeline 12.

The air blowing mechanism 40 comprises an air blowing pipeline 41 and a first control valve 42, wherein the air blowing pipeline 41 is communicated with the heat exchange mechanism 10, and the first control valve 42 is arranged on the air blowing pipeline 41 and used for controlling the on-off of the air blowing pipeline 41. Thus, the first control valve 42 can be controlled to control the on-off of the air blowing pipeline 41 so as to control whether the air blowing mechanism 40 blows air into the heat exchange mechanism 10. Specifically, the first control valve 42, the second control valve 130, and the third control valve 74 are all solenoid valves.

Further, the blowing mechanism 40 further includes a pressure control valve 43, and the pressure control valve 43 is provided on the blowing line 41 for controlling the pressure of the gas in the blowing line 41 flowing to the heat exchanging mechanism 10. Thus, when the heat exchange system 100 is in a purge state, the flow rate of the gas in the closed circuit can be controlled by controlling the pressure control valve 43, thereby controlling the rate at which the heat exchange medium is directed into the reservoir mechanism 20. When the heat exchange system 100 is in a pressure maintaining state, the pressure of the closed circuit can be controlled to reach a preset value by controlling the pressure control valve 43.

The blowing mechanism 40 further includes a first check valve 44, and the first check valve 44 is provided on the blowing pipe 41 to allow the gas in the blowing pipe 41 to flow forward into the heat exchange mechanism 10, avoiding the reverse flow of the gas.

Further, the air blowing mechanism 40 further includes an air source 45, the air blowing pipeline 41 is communicated with the air source 45, and the air source 45 can supply air into the air blowing pipeline 41 so as to avoid using external equipment to blow air into the air blowing mechanism 40.

In another embodiment of the present application, a sorting test device including the heat exchange system 100 is further provided, and since the heat exchange system 100 has the beneficial effects, the sorting test device has the same beneficial effects, and will not be described in detail herein.

The working principle of the heat exchange system 100 and the sorting test device provided in the embodiment of the present application is as follows:

when the heat exchange system 100 is in the purge state, the second control valve 130 is closed and the exhaust valve 30 is opened, and the air blowing mechanism 40 blows air into the second pipe 13. The gas sequentially passes through the second pipeline 13, the heat exchanger 11, the first pipeline 12 and the branch 140, and finally reaches the liquid storage mechanism 20 through the branch 140, so that heat exchange mediums in the second pipeline 13, the heat exchanger 11 and the first pipeline 12 all flow to the liquid storage mechanism for storage.

When the heat exchange system 100 is in a pressure maintaining state, the second control valve 130 is opened, the exhaust valve 30 is closed, the air blowing mechanism 40 blows air into the second pipeline 13, and the pressure control valve 43 is adjusted so that the pressure in the closed loop reaches a preset value. The air source 45 is cut off, the pressure sensor 170 is used for monitoring the pressure of the closed loop, after the pressure is stabilized for a preset time period (for example, 10 min), timing is started, and the pressure drop condition is observed after a certain time period. And further analyzing whether leakage occurs in the closed loop, opening the exhaust valve 30 after the pressure maintaining is completed, exhausting gas, and completing the pressure maintaining.

The heat exchange system 100 provided in the embodiment of the application has the following beneficial effects:

1. on the basis of not changing the structural arrangement of the heat exchange system 100, the heat exchange medium in the heat exchange mechanism 10 can be recovered by adopting a compressed gas pressurized purging mode without disassembling the pipeline, and the operation is simple, time-saving and labor-saving.

2. By the pressure maintaining of the compressed gas, whether leakage points exist in the heat exchanger 11 and the pipeline of the heat exchange system 100 can be rapidly judged, and the operation reliability of the heat exchange system 100 is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (11)

1. A heat exchange system, comprising:

the heat exchange mechanism (10) and the liquid storage mechanism (20) are connected with each other to form a closed loop, the heat exchange mechanism (10) comprises a heat exchanger (11), and the heat exchanger (11) is used for exchanging heat with a piece to be detected so as to control the temperature of the piece to be detected; the liquid storage mechanism (20) is provided with an exhaust port (21) which can be opened and closed;

and the blowing mechanism (40) is communicated with the heat exchange mechanism (10) and is used for blowing air to the heat exchange mechanism (10).

2. The heat exchange system of claim 1, wherein the heat exchange system has a purge state and a dwell state; when the heat exchange system is in the purging state, the exhaust port (21) is opened, and the air blowing mechanism (40) blows air to the heat exchange mechanism (10) so that heat exchange medium in the heat exchange mechanism (10) flows to the liquid storage mechanism (20) for storage; when the heat exchange system is in the pressure maintaining state, the air outlet (21) is closed, and the air blowing mechanism (40) blows air to the heat exchange mechanism (10) so that the pressure in the closed loop reaches a preset value.

3. Heat exchange system according to claim 1, wherein the blowing means (40) comprises a blowing line (41) and a first control valve (42), the blowing line (41) being in communication with the heat exchange means (10), the first control valve (42) being provided on the blowing line (41) for controlling the on-off of the blowing line (41).

4. A heat exchange system according to claim 3, wherein the blowing mechanism (40) further comprises a pressure control valve (43), the pressure control valve (43) being provided on the blowing line (41) for controlling the pressure of the gas in the blowing line (41) flowing into the heat exchange mechanism (10); and/or

The blowing mechanism (40) further comprises a first one-way valve (44), and the first one-way valve (44) is arranged on the blowing pipeline (41) so as to allow the gas in the blowing pipeline (41) to positively flow into the heat exchange mechanism (10); and/or

The blowing mechanism (40) further comprises a gas source (45), and the gas source (45) is communicated with the blowing pipeline (41) and is used for supplying gas into the blowing pipeline (41).

5. The heat exchange system according to claim 1, wherein the heat exchange mechanism (10) further comprises a first conduit (12) and a second conduit (13), the first conduit (12) being in communication between the reservoir (20) and the input of the heat exchanger (11), the second conduit (13) being in communication between the reservoir (20) and the output of the heat exchanger (11);

the blowing mechanism (40) is communicated with the first pipeline (12) or the second pipeline (13).

6. The heat exchange system according to claim 5, further comprising a second control valve (130), the second control valve (130) being provided on a line communicating with the blowing mechanism (40), and the second control valve (130) being located between a connection point of the line with which the blowing mechanism (40) communicates and the liquid storage mechanism (20); the second control valve (130) is used for controlling the on-off of the part of the pipeline between the connecting point and the liquid storage mechanism (20).

7. The heat exchange system according to claim 1, further comprising a branch (140), the branch (140) being in communication between the heat exchange means (10) and the reservoir means (20); the blowing mechanism (40) can blow the heat exchange medium in the heat exchange mechanism (10) into the branch (140) and flow to the liquid storage mechanism (20) for storage through the branch (140).

8. The heat exchange system according to claim 7, wherein the heat exchange mechanism (10) further comprises a first conduit (12) and a second conduit (13), the first conduit (12) being in communication between the reservoir (20) and the input of the heat exchanger (11), the second conduit (13) being in communication between the reservoir (20) and the output of the heat exchanger (11); a second one-way valve (150) is arranged on the first pipeline (12), and the second one-way valve (150) allows a heat exchange medium in the liquid storage mechanism (20) to flow to the heat exchanger (11) through the first pipeline (12); the blowing mechanism (40) is communicated with the second pipeline (13);

the branch circuit (140) is communicated between the first pipeline (12) and the liquid storage mechanism (20), and a communication point of the branch circuit (140) and the first pipeline (12) is positioned between the second one-way valve (150) and the heat exchanger (11).

9. The heat exchange system according to claim 7, further comprising a third one-way valve (160), said third one-way valve (160) being provided on said branch (140) to allow heat exchange medium in said heat exchange means (10) to flow through said branch (140) to said reservoir means (20) for storage.

10. Heat exchange system according to any one of claims 1-9, further comprising a vent valve (30) mounted on the reservoir (20), the vent valve (30) being adapted to open and close the vent (21).

11. A sorting test apparatus comprising a heat exchange system according to any one of claims 1 to 10.