Refrigerating system and testing and sorting equipment

Abstract

The utility model relates to a refrigeration system and test sorting equipment, comprising: a first refrigeration module comprising a first compressor, a first condenser, a first throttle valve and an evaporator which are sequentially communicated to form a first circulation loop, the first circulation loop comprising an air return pipeline and an exhaust pipeline which are respectively communicated with the input end and the output end of the compressor; the heat exchange mechanism is thermally coupled with the exhaust pipeline through the exhaust cooler, so that the temperature of a refrigerant in the exhaust pipeline is reduced when the refrigerating system is in a first refrigerating mode; and the heat exchange mechanism is thermally coupled with the air return pipeline through at least one heat exchanger, so that the temperature of the refrigerant in the air return pipeline is reduced when the refrigerating system is in the first refrigerating mode and / or the temperature of the refrigerant in the air return pipeline is increased when the refrigerating system is in the second refrigerating mode.

Description

Technical Field

[0001] The utility model relates to the technical field of testing and sorting, in particular to a refrigeration system and testing and sorting equipment. Background Art

[0002] With the development of economy and the progress of society, electronic components are widely used in various fields. Before electronic components are put into use, they need to be tested for reliability and stability at various temperatures by test sorting equipment. Test sorting equipment generally includes a refrigeration system and a heating system. The heating system is used as a heat source, and the refrigeration system is used as a cold source. The temperature of the test environment is controlled by the heat and cold confrontation between the heat source and the cold source.

[0003] At present, the temperature control range requirements for electronic components are wide, such as the need to meet the temperature control requirements of -55℃-150℃. Under high temperature conditions, the return temperature of the refrigerant from the evaporator to the compressor is too high due to the large heat transfer temperature difference, and the exhaust temperature of the compressor is too high, resulting in instability of the refrigeration system, and then poor temperature control effect. Under low temperature conditions, because the temperature of the refrigerant in the evaporator after heat exchange with the electronic components is too low, there is often a risk of return gas carrying liquid, which will also cause instability of the refrigeration system, and then poor temperature control effect. Utility Model Content

[0004] Based on this, it is necessary to provide a refrigeration system and testing and sorting equipment that ensures stable operation of the system to ensure the temperature control effect in order to address the problem of poor temperature control effect caused by system instability when the refrigeration system is operating under high or low temperature conditions.

[0005] A refrigeration system, comprising:

[0006] A first refrigeration module, comprising a first compressor, a first condenser, a first throttle valve and an evaporator connected in sequence to form a first circulation loop, wherein the first circulation loop comprises a return air pipeline and an exhaust air pipeline connected to an input end and an output end of the first compressor respectively;

[0007] An exhaust gas cooler, a heat exchange mechanism and at least one heat exchanger; the heat exchange mechanism is thermally coupled to the exhaust gas pipeline through the exhaust gas cooler, so that the temperature of the refrigerant in the exhaust gas pipeline is reduced when the refrigeration system is in the first refrigeration mode; the heat exchange mechanism is thermally coupled to the return gas pipeline through at least one of the heat exchangers, so that the temperature of the refrigerant in the return gas pipeline is reduced when the refrigeration system is in the first refrigeration mode and / or the temperature of the refrigerant in the return gas pipeline is increased when the refrigeration system is in the second refrigeration mode.

[0008] In one embodiment, the heat exchange mechanism comprises:

[0009] A coolant circuit, wherein the coolant circuit is thermally coupled to the exhaust pipeline through the exhaust gas cooler;

[0010] A second refrigeration module comprises a throttling mechanism, a second compressor and a second condenser, wherein the throttling mechanism comprises a second throttling valve, the second compressor, the second condenser, the second throttling valve and the first condenser are sequentially connected to form a second circulation loop; the secondary refrigerant loop is thermally coupled to the second circulation loop through the second condenser;

[0011] The second refrigeration module also includes at least one heat exchange pipeline, and both ends of each heat exchange pipeline are respectively connected to the output end of the second condenser and the input end of the second compressor; each heat exchange pipeline is thermally coupled with the return air pipeline through one heat exchanger, so that the temperature of the refrigerant in the return air pipeline decreases when the refrigeration system is in the first refrigeration mode and / or increases when the refrigeration system is in the second refrigeration mode.

[0012] In one embodiment, the heat exchange pipeline is arranged independently from the second circulation loop.

[0013] In one of the embodiments, the second refrigeration module includes one of the heat exchange pipelines;

[0014] One end of the heat exchange pipeline is connected to the output end of the second throttle valve, and the other end is connected to the input end of the second compressor; the refrigerant in the heat exchange pipeline expands and reduces pressure through the second throttle valve and then flows to the heat exchanger, so that the temperature of the refrigerant in the return air pipeline decreases when the refrigeration system is in the first refrigeration mode and the temperature of the refrigerant in the return air pipeline increases when the refrigeration system is in the second refrigeration mode; or

[0015] One end of the heat exchange pipeline is connected to the output end of the second condenser, and the other end is connected to the input end of the second compressor. The throttling mechanism also includes a third throttle valve, which is arranged on the heat exchange pipeline. The refrigerant in the heat exchange pipeline expands and reduces pressure through the third throttle valve and then flows to the heat exchanger, so that the temperature of the refrigerant in the return air pipeline decreases when the refrigeration system is in the first refrigeration mode and increases when the refrigeration system is in the second refrigeration mode.

[0016] In one embodiment, the second refrigeration module includes two heat exchange pipelines, each of which is thermally coupled to the return air pipeline via one heat exchanger;

[0017] The refrigerant in one of the heat exchange pipelines is expanded and reduced in pressure through the throttling mechanism and then flows to the heat exchanger, so that the temperature of the refrigerant in the return air pipeline is reduced when the refrigeration system is in the first refrigeration mode. The refrigerant in the other heat exchange pipeline is expanded and reduced in pressure through the throttling mechanism after exchanging heat with the refrigerant in the return air pipeline in the heat exchanger and then flows to the second compressor, so that the temperature of the refrigerant in the return air pipeline is increased when the refrigeration system is in the second refrigeration mode.

[0018] In one embodiment, the refrigeration system further includes a first control valve, which is disposed on the heat exchange pipeline to control the on-off of the heat exchange pipeline.

[0019] In one of the embodiments, the refrigeration system includes a heat exchange pipeline;

[0020] The heat exchange pipeline is part of the second circulation loop and is located between the output end of the second throttle valve and the input end of the first condenser; the refrigerant in the heat exchange pipeline is expanded and reduced in pressure through the second throttle valve and then flows to the heat exchanger, so that the temperature of the refrigerant in the return air pipeline decreases when the refrigeration system is in the first refrigeration mode and increases when the refrigeration system is in the second refrigeration mode.

[0021] In one of the embodiments, the refrigerant circuit is thermally coupled to the return air line via a heat exchanger.

[0022] In one embodiment, the refrigerant circuit includes a main circuit and a branch circuit, the main circuit is thermally coupled to the second condenser, and the branch circuit is thermally coupled to the exhaust gas pipeline through the exhaust gas cooler or thermally coupled to the return gas pipeline through the heat exchanger; or

[0023] The refrigeration system includes a plurality of independently arranged brine circuits, each of which is thermally coupled to a corresponding structure.

[0024] In one embodiment, the refrigeration system further includes a second control valve, which is disposed on the refrigerant circuit to control the on / off of the refrigerant circuit.

[0025] In one embodiment, the coolant in the coolant circuit is cooling water.

[0026] A testing and sorting device comprises the refrigeration system as described above.

[0027] The above-mentioned refrigeration system and test and sorting equipment, when the refrigeration system is working under high temperature conditions, the refrigeration system is in the first refrigeration mode, and the temperature of the refrigerant flowing from the evaporator to the first compressor is too high due to the large heat transfer temperature difference. The heat exchange mechanism exchanges heat with the refrigerant in the return air pipeline through the heat exchanger (at this time, the heat exchanger acts as a cooler), thereby reducing the temperature of the refrigerant in the return air pipeline. At the same time, the heat exchange mechanism exchanges heat with the refrigerant in the exhaust pipeline through the exhaust cooler, thereby reducing the temperature of the refrigerant in the exhaust pipeline, so as to avoid the return air temperature and exhaust temperature of the first compressor being too high, thereby ensuring the stable operation of the refrigeration system. When the refrigeration system is working under low temperature conditions, the refrigeration system is in the second refrigeration mode. When there is a risk of return air carrying liquid due to the low temperature of the refrigerant in the evaporator after heat exchange with the electronic components, the heat exchange mechanism exchanges heat with the refrigerant in the return air pipeline through the heat exchanger (at this time, the heat exchanger acts as a heat recuperator), thereby increasing the temperature of the refrigerant in the return air pipeline to avoid liquid in the return air of the first compressor, thereby ensuring the stable operation of the refrigeration system and the temperature control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a refrigeration system provided in one embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of a refrigeration system provided in another embodiment of the present application;

[0030] Figure 3 A schematic diagram of the structure of a refrigeration system provided in yet another embodiment of the present application;

[0031] Figure 4 A schematic diagram of the structure of a refrigeration system provided in yet another embodiment of the present application;

[0032] Figure 5 A schematic diagram of the structure of a refrigeration system provided in yet another embodiment of the present application;

[0033] Figure 6 A schematic structural diagram of a refrigeration system provided in another embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100. refrigeration system; 10. first refrigeration module; 11. first compressor; 12. first condenser; 13. first throttle valve; 14. evaporator; 15. return air pipeline; 16. exhaust pipeline; 20. exhaust cooler; 30. heat exchange mechanism; 31. refrigerant circuit; 311. main circuit; 312. branch circuit; 313. cold source; 314. refrigerant pipeline; 315. main circuit; 32. second refrigeration module; 321. second compressor; 322. second condenser; 323. second throttle valve; 324. heat exchange pipeline; 324a. first heat exchange pipeline; 324b. second heat exchange pipeline; 325. third throttle valve; 326. fourth throttle valve; 327. fifth throttle valve; 40. heat exchanger; 50. first control valve; 60. second control valve. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, 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 invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature 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. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] See also Figure 1 An embodiment of the present application provides a refrigeration system 100, including a first refrigeration module 10. The first refrigeration module 10 includes a first compressor 11, a first condenser 12, a first throttle valve 13 and an evaporator 14, and the first compressor 11, the first condenser 12, the first throttle valve 13 and the evaporator 14 are connected in sequence to form a first circulation loop.

[0043] When the first circulation loop is working, the first compressor 11 sucks the high-temperature, low-pressure refrigerant gas output from the output end of the evaporator 14, compresses the refrigerant into a high-temperature, high-pressure refrigerant gas, and discharges it from the exhaust end (output end) of the first compressor 11 to the first condenser 12. When the refrigerant passes through the first condenser 12, it is condensed into a medium-temperature, high-pressure refrigerant liquid by the first condenser 12, and is expanded and reduced in pressure to a low-temperature, low-pressure refrigerant liquid through the first throttle valve 13, and finally input into the evaporator 14 again from the input end of the evaporator 14. When the low-temperature, low-pressure liquid refrigerant enters the evaporator 14, it can exchange heat with electronic components, thereby controlling the temperature of the electronic components. The refrigerant after heat exchange enters the first compressor 11 again from the output end of the evaporator 14, and the cycle repeats.

[0044] The first circulation loop includes a return air pipeline 15 and an exhaust air pipeline 16. The two ends of the return air pipeline 15 are respectively connected to the output end of the evaporator 14 and the input end of the first compressor 11. The two ends of the exhaust air pipeline 16 are respectively connected to the output end of the first compressor 11 and the input end of the first condenser 12. In this way, the refrigerant passes through the output end of the first compressor 11 to the exhaust air pipeline 16, and enters the first condenser 12 through the exhaust air pipeline 16. The refrigerant passes through the output end of the evaporator 14 to the return air pipeline 15, and enters the first compressor 11 through the return air pipeline 15.

[0045] Further reading Figure 1 The refrigeration system 100 further includes an exhaust gas cooler 20, a heat exchange mechanism 30, and at least one heat exchanger 40. The heat exchange mechanism 30 is thermally coupled to the exhaust gas pipeline 16 through the exhaust gas cooler 20, so that the temperature of the refrigerant in the exhaust gas pipeline 16 is reduced when the refrigeration system 100 is in the first refrigeration mode. The heat exchange mechanism 30 is thermally coupled to the return gas pipeline 15 through at least one heat exchanger 40, so that the temperature of the refrigerant in the return gas pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode and / or the temperature of the refrigerant in the return gas pipeline 15 is increased when the refrigeration system 100 is in the second refrigeration mode.

[0046] It should be noted that the heat exchange mechanism 30 is thermally coupled to the return air pipeline 15 through at least one heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode and / or the temperature of the refrigerant in the return air pipeline 15 is increased when the refrigeration system 100 is in the second refrigeration mode, including three situations:

[0047] 1. The heat exchange mechanism 30 is thermally coupled to the return air pipeline 15 through at least one heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode.

[0048] 2. The heat exchange mechanism 30 is thermally coupled to the return air pipeline 15 via at least one heat exchanger 40 so that the temperature of the refrigerant in the return air pipeline 15 increases when the refrigeration system 100 is in the second refrigeration mode.

[0049] 3. The heat exchange mechanism 30 is thermally coupled to the return air pipeline 15 through at least one heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode, and the temperature of the refrigerant in the return air pipeline 15 is increased when the refrigeration system 100 is in the second refrigeration mode. It should be noted that the heat exchanger 40 in this case can have two functions of cooling and heating the return air pipeline 15, but these two functions are determined by the two refrigeration modes of the refrigeration system 100 one by one, rather than having them simultaneously in one refrigeration mode.

[0050] When the refrigeration system 100 is working under high temperature conditions, the refrigeration system 100 is in the first refrigeration mode. Due to the large heat transfer temperature difference, the temperature of the refrigerant flowing from the evaporator 14 to the first compressor 11 is too high. The heat exchange mechanism 30 exchanges heat with the refrigerant in the return gas pipeline 15 through the heat exchanger 40 (at this time, the heat exchanger 40 acts as a cooler), thereby reducing the temperature of the refrigerant in the return gas pipeline 15. At the same time, the heat exchange mechanism 30 exchanges heat with the refrigerant in the exhaust gas pipeline 16 through the exhaust gas cooler 20, thereby reducing the temperature of the refrigerant in the exhaust gas pipeline 16. In this way, the return gas temperature and exhaust gas temperature of the first compressor 11 are prevented from being too high, and the stable operation of the refrigeration system 100 is ensured, thereby ensuring the temperature control effect. When the refrigeration system 100 is working under low temperature conditions, the refrigeration system 100 is in the second refrigeration mode. Because the temperature of the refrigerant in the evaporator 14 is too low after heat exchange with the electronic components, there is a risk of liquid in the return gas. The heat exchange mechanism 30 exchanges heat with the refrigerant in the return air pipeline 15 through the heat exchanger 40 (at this time, the heat exchanger 40 acts as a heat recuperator), thereby increasing the temperature of the refrigerant in the return air pipeline 15 to avoid liquid in the return air of the first compressor 11, thereby ensuring the stable operation of the refrigeration system 100 and thus ensuring the temperature control effect.

[0051] It should be noted here that since the heat exchange mechanism 30 is independently arranged from the first circulation loop, compared with the prior art method of solving the problem of excessive return air and exhaust temperatures of the first compressor 11 due to excessive heat transfer temperature difference under high temperature conditions through return air bypass (a bypass line is drawn out from the outlet of the first condenser 12 to the output end of the evaporator 14, and part of the refrigerant flows through the bypass line through the first condenser 12 to the output end of the evaporator 14), it will not cause the loss of refrigeration capacity in the first circulation loop, so that the first circulation loop can exert a better refrigeration capacity.

[0052] In some embodiments, continue to refer to Figure 1, the heat exchange mechanism 30 includes a refrigerant circuit 31, and the refrigerant can circulate in the refrigerant circuit 31. The refrigerant circuit 31 is thermally coupled to the exhaust pipe 16 through the exhaust cooler 20, and the refrigerant in the refrigerant circuit 31 can exchange heat with the refrigerant in the exhaust pipe 16 in the exhaust cooler 20. After the heat exchange, the temperature of the refrigerant increases and the temperature of the refrigerant decreases, thereby avoiding excessive exhaust temperature of the refrigeration system 100 under high temperature conditions. Optionally, the refrigerant is cooling water. The cooling water temperature is generally 10°C-15°C, and the exhaust temperature of the first compressor 11 is much higher than the temperature of the cooling water. The cooling water can exchange heat with the refrigerant in the exhaust cooler 20 to reduce the exhaust temperature of the first compressor 11. Of course, in some other embodiments, the type of refrigerant is not limited.

[0053] Continue reading Figure 1 , the heat exchange mechanism 30 also includes a second refrigeration module 32. The second refrigeration module 32 includes a throttling mechanism, a second compressor 321 and a second condenser 322, and the throttling mechanism includes a second throttle valve 323. The second compressor 321, the second condenser 322, the second throttle valve 323 and the first condenser 12 are connected in sequence to form a second circulation loop. The refrigerant loop 31 is thermally coupled with the second circulation loop through the second condenser 322 for heat dissipation of the second circulation loop. The first circulation loop and the second circulation loop are thermally coupled through the first condenser 12, and the first condenser 12 serves as a condenser of the first circulation loop and as an evaporator 14 of the second circulation loop. At this time, the first refrigeration module 10 is a low-temperature refrigeration module, and the second refrigeration module 32 is a high-temperature refrigeration module.

[0054] It should be noted that the changes in pressure and form of the refrigerant in the second circulation loop refer to the first circulation loop and will not be repeated here.

[0055] The second refrigeration module 32 further includes at least one heat exchange pipeline 324, and both ends of each heat exchange pipeline 324 are respectively connected to the output end of the second condenser 322 and the input end of the second compressor 321. Each heat exchange pipeline 324 is thermally coupled to the return air pipeline 15 through a heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode and / or increased when the refrigeration system 100 is in the second refrigeration mode.

[0056] It should be noted that when the refrigeration system 100 is operated in the first refrigeration mode, the temperature of the refrigerant in the heat exchange pipe 324 after expansion and pressure reduction by the throttling mechanism is much lower than the temperature of the refrigerant output through the output end of the evaporator 14, and can be used for cooling the return air of the first compressor 11. When the refrigeration system 100 is operated in the second refrigeration mode, the temperature of the refrigerant in the heat exchange pipe 324 is higher than the temperature of the refrigerant output through the output end of the evaporator 14, and can be used for heating the return air of the first compressor 11.

[0057] In some embodiments, the heat exchange line 324 is independently provided from the second circulation loop. Thus, when the heat exchange line 324 exchanges heat with the return air line 15 through the heat exchanger 40, the operation of the second circulation loop is not affected, so that the refrigerant flowing to the evaporator 14 in the first circulation loop can reach a lower temperature.

[0058] In some specific implementations, see Figure 2 , the second refrigeration module 32 includes a heat exchange pipeline 324. One end of the heat exchange pipeline 324 is connected to the output end of the second throttle valve 323, and the other end is connected to the input end of the second compressor 321. The refrigerant in the heat exchange pipeline 324 expands and reduces pressure through the second throttle valve 323 and then flows to the heat exchanger 40, and exchanges heat with the refrigerant in the return air pipeline 15 in the heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode, and the temperature of the refrigerant in the return air pipeline 15 is increased when the refrigeration system 100 is in the second refrigeration mode. At this time, the refrigerant in the second circulation loop and the refrigerant in the heat exchange pipeline 324 are both expanded and reduced in pressure through the second throttle valve 323, which simplifies the structural setting of the refrigeration system 100.

[0059] In some other specific implementations, please refer to Figure 1 , the second refrigeration module 32 includes a heat exchange pipeline 324. One end of the heat exchange pipeline 324 is connected to the output end of the second condenser 322, and the other end is connected to the input end of the second compressor 321. The throttling mechanism also includes a third throttle valve 325, which is arranged on the heat exchange pipeline 324. The refrigerant in the heat exchange pipeline 324 expands and depressurizes through the third throttle valve 325 and then flows to the heat exchanger 40, and exchanges heat with the refrigerant in the return air pipeline 15 in the heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode, and the temperature of the refrigerant in the return air pipeline 15 is increased when the refrigeration system 100 is in the second refrigeration mode. At this time, the refrigerant in the second circulation loop and the refrigerant in the heat exchange pipeline 324 are expanded and depressurized through the second throttle valve 323 and the third throttle valve 325 respectively, and do not affect each other.

[0060] In some other embodiments, see Figure 3The second refrigeration module 32 includes two heat exchange pipelines 324, each heat exchange pipeline 324 is thermally coupled to the return air pipeline 15 through a heat exchanger 40. The refrigerant in one heat exchange pipeline 324 is expanded and depressurized by a throttling mechanism and then flows to the heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode, so as to be used for return air cooling under high temperature conditions. The refrigerant in the other heat exchange pipeline 324 exchanges heat with the refrigerant in the return air pipeline 15 in the heat exchanger 40, and then expands and depressurizes by a throttling mechanism and then flows to the second compressor 321, so that the temperature of the refrigerant in the return air pipeline 15 is increased when the refrigeration system 100 is in the second refrigeration mode. In this way, the heat exchange pipeline 324 corresponding to the return air cooling under high temperature conditions and the heat exchange pipeline 324 corresponding to the return air heating under low temperature conditions are independently set and do not affect each other.

[0061] The heat exchange pipeline 324 corresponding to the return air temperature reduction under high temperature conditions is defined as the first heat exchange pipeline 324a, and the heat exchange pipeline 324 corresponding to the return air temperature increase under low temperature conditions is defined as the second heat exchange pipeline 324b. In some specific embodiments, one end of the first heat exchange pipeline 324a is connected to the output end of the second throttle valve 323, and the other end is connected to the input end of the second compressor 321. The refrigerant in the first heat exchange pipeline 324a flows to the corresponding heat exchanger 40 after expansion and pressure reduction through the second throttle valve 323, and exchanges heat with the refrigerant in the return air pipeline 15 in the heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode. The refrigerant in the first heat exchange pipeline 324a directly flows back to the second compressor 321 after heat exchange with the refrigerant in the return air pipeline 15. One end of the second heat exchange pipeline 324b is connected to the output end of the second condenser 322, and the other end is connected to the input end of the second throttle valve 323. The refrigerant in the second heat exchange pipeline 324b flows to the corresponding heat exchanger 40 to exchange heat with the refrigerant in the return air pipeline 15, so that the temperature of the refrigerant in the return air pipeline 15 increases when the refrigeration system 100 is in the second refrigeration mode. The refrigerant in the second heat exchange pipeline 324b exchanges heat with the refrigerant in the return air pipeline 15, and flows to the first condenser 12 through the second throttle valve 323 after expansion and decompression. In this way, the refrigerant in the second circulation loop and the refrigerant in the heat exchange pipeline 324 are both expanded and decompressed through the second throttle valve 323, which simplifies the structural setting of the refrigeration system 100.

[0062] In some other specific implementations, please refer to Figure 3One end of the first heat exchange pipeline 324a is connected to the output end of the second condenser 322, and the other end is connected to the input end of the second compressor 321. The throttling mechanism also includes a fourth throttle valve 326, which is arranged on the first heat exchange pipeline 324a. The refrigerant in the first heat exchange pipeline 324a flows to the corresponding heat exchanger 40 after expansion and pressure reduction through the fourth throttle valve 326, and exchanges heat with the refrigerant in the return air pipeline 15 in the heat exchanger 40, so that the temperature of the refrigerant in the return air pipeline 15 is reduced when the refrigeration system 100 is in the first refrigeration mode. The refrigerant in the first heat exchange pipeline 324a directly flows back to the second compressor 321 after heat exchange with the refrigerant in the return air pipeline 15. The throttling mechanism also includes a fifth throttle valve 327. One end of the second heat exchange pipeline 324b is connected to the output end of the second condenser 322, and the other end is connected to the input end of the first condenser 12. The fifth throttle valve 327 is arranged on the second heat exchange pipeline 324b. The refrigerant in the second heat exchange pipeline 324b flows to the corresponding heat exchanger 40 to exchange heat with the refrigerant in the return air pipeline 15, so that the temperature of the refrigerant in the return air pipeline 15 increases when the refrigeration system 100 is in the second refrigeration mode. The refrigerant in the second heat exchange pipeline 324b exchanges heat with the refrigerant in the return air pipeline 15, and flows to the first condenser 12 after expansion and pressure reduction by the fifth throttle valve 327. The refrigerant in the second circulation loop and the refrigerant in the first heat exchange pipeline 324a are expanded and reduced in pressure through the second throttle valve 323 and the fourth throttle valve 326 respectively, without affecting each other; similarly, the refrigerant in the second circulation loop and the refrigerant in the second heat exchange pipeline 324b are expanded and reduced in pressure through the second throttle valve 323 and the fifth throttle valve 327 respectively, without affecting each other.

[0063] See also Figure 4 The refrigeration system 100 further includes a first control valve 50, which is disposed on the heat exchange pipeline 324 to control the on-off of the heat exchange pipeline 324. Thus, when the refrigerant in the return gas pipeline 15 does not need to be cooled or heated, the first control valve 50 is closed and the heat exchange pipeline 324 is disconnected, and when the refrigerant in the return gas pipeline 15 needs to be cooled or heated, the first control valve 50 is opened and the heat exchange pipeline 324 is connected, which is convenient for control.

[0064] In some other embodiments, see Figure 5, the refrigeration system 100 includes a heat exchange line 324, which is a part of the second circulation loop and is located between the output end of the second throttle valve 323 and the input end of the first condenser 12. The refrigerant in the heat exchange line 324 flows to the heat exchanger 40 after expansion and decompression through the second throttle valve 323. In this way, when the refrigeration system 100 operates in the first refrigeration mode, the refrigerant in the heat exchange line 324 flows to the heat exchanger 40 after expansion and decompression through the second throttle valve 323, and exchanges heat with the refrigerant in the return air line 15 in the heat exchanger 40. After the heat exchange, the temperature of the refrigerant in the return air line 15 decreases and flows back to the first compressor 11, and the temperature of the refrigerant in the heat exchange line 324 increases and flows to the first condenser 12. When the refrigeration system 100 operates in the second refrigeration mode, the refrigerant in the heat exchange line 324 expands and reduces pressure through the second throttle valve 323 and flows to the heat exchanger 40, where it exchanges heat with the refrigerant in the return air line 15. After the heat exchange, the temperature of the refrigerant in the return air line 15 increases and flows back to the second compressor 321, while the temperature of the refrigerant in the heat exchange line 324 decreases and flows to the first condenser 12.

[0065] In some embodiments, see Figure 6 The refrigerant loop 31 is thermally coupled to the return gas line 15 through a heat exchanger 40, so that the temperature of the refrigerant in the return gas line 15 is reduced when the refrigeration system 100 is in the first refrigeration mode and / or the temperature of the refrigerant in the return gas line 15 is increased when the refrigeration system 100 is in the second refrigeration mode. The temperature of the cooling water is generally 10°C-15°C. When the refrigeration system 100 is in the first refrigeration mode, the temperature of the cooling water is much lower than the temperature of the refrigerant output through the output end of the evaporator 14, and the cooling water can be used to cool the refrigerant in the return gas line 15. When the refrigeration system 100 is in the second refrigeration mode, the temperature of the cooling water is higher than the temperature of the refrigerant output through the output end of the evaporator 14, and the cooling water can be used to increase the temperature of the refrigerant in the return gas line 15.

[0066] In some embodiments, continue to refer to Figure 4 The refrigerant circuit 31 includes a main circuit 311 and a branch circuit 312 which are interconnected. The main circuit 311 is thermally coupled with the second circulation circuit through the second condenser 322, and the branch circuit 312 is thermally coupled with the exhaust pipe 16 through the exhaust gas cooler 20 or the branch circuit 312 is thermally coupled with the return gas pipe 15 through the heat exchanger 40. Specifically, the main circuit 311 includes a cold source and a main circuit 315, the main circuit 315 is connected with the cold source 314 to form the main circuit 311, and the branch circuit 312 is connected with the main circuit.

[0067] In some other embodiments, continue to refer to Figure 6The refrigeration system 100 includes a plurality of independently arranged refrigerant loops 31, specifically three, one refrigerant loop 31 is thermally coupled to the exhaust pipe 16 through the exhaust gas cooler 20, another refrigerant loop 31 is thermally coupled to the second circulation loop through the second condenser 322, and another refrigerant loop 31 is thermally coupled to the return air pipe 15 through the heat exchanger 40. Each refrigerant loop 31 includes a cold source 313 and a cold pipe 314, and the cold source 313 and the cold pipe 314 are connected to form the refrigerant loop 31.

[0068] Continue reading Figure 4 The refrigeration system 100 further includes a second control valve 60 , which is disposed in the refrigerant circuit 31 to control the on-off of the refrigerant circuit 31 .

[0069] Another embodiment of the present application further provides a testing and sorting device, comprising the above-mentioned refrigeration system 100. Since the above-mentioned refrigeration system 100 has beneficial effects, the testing and sorting device comprising the above-mentioned refrigeration system 100 has the same beneficial effects, which will not be described in detail here.

[0070] The specific embodiment of this application (see Figure 6 The working principle of the refrigeration system 100 and the test and sorting equipment provided by ) is as follows:

[0071] When the refrigeration system 100 operates in the first refrigeration mode:

[0072] The brine circuit 31 thermally coupled with the exhaust pipe 16 is communicated, and the brine in the brine circuit 31 exchanges heat with the refrigerant in the exhaust pipe 16 through the exhaust cooler 20, so that the temperature of the refrigerant in the exhaust pipe 16 is reduced. At the same time, the brine circuit 31 thermally coupled with the return pipe 15 is communicated, and the brine in the brine circuit 31 exchanges heat with the refrigerant in the return pipe 15 through the heat exchanger 40, so that the temperature of the refrigerant in the return pipe 15 is reduced. After the refrigerant in the return pipe 15 exchanges heat with the brine, it flows to the next heat exchanger 40 to exchange heat with the refrigerant in the heat exchange pipe 324. The temperature of the refrigerant in the return pipe 15 is further reduced and then flows to the first compressor 11. In this way, the refrigerant in the exhaust pipe 16 is cooled after heat exchange with the coolant, and the refrigerant in the return air pipe 15 is cooled after heat exchange with the coolant, and then cooled again by heat exchange with the refrigerant in the heat exchange pipe 324 of the high-temperature refrigeration module, thereby reducing the amount of refrigerant flowing from the high-temperature refrigerant module to the heat exchange pipe 314, ensuring that the amount of refrigerant in the second circulation loop is sufficient, so that the refrigeration capacity of the system can be fully utilized.

[0073] When the refrigeration system 100 operates in the second refrigeration mode:

[0074] The brine circuit 31 thermally coupled with the exhaust pipe 16 is disconnected, and the brine circuit 31 thermally coupled with the return pipe 15 is connected. The brine in the brine circuit 31 exchanges heat with the refrigerant in the return pipe 15 through the heat exchanger 40, so that the temperature of the refrigerant in the return pipe 15 increases. At this time, the heat exchange pipe 324 can be connected with the brine circuit 31 to jointly participate in the temperature increase of the refrigerant in the return pipe 15, or it can be disconnected, and the brine in the brine circuit 31 is used to heat the refrigerant in the return pipe 15.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0076] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A refrigeration system, characterized in that: include: A first refrigeration module (10) comprises a first compressor (11), a first condenser (12), a first throttle valve (13) and an evaporator (14) which are connected in sequence to form a first circulation loop, wherein the first circulation loop comprises a return air pipeline (15) and an exhaust air pipeline (16) which are respectively connected to an input end and an output end of the first compressor (11); An exhaust gas cooler (20), a heat exchange mechanism (30) and at least one heat exchanger (40); the heat exchange mechanism (30) is thermally coupled to the exhaust gas pipeline (16) through the exhaust gas cooler (20), so that the temperature of the refrigerant in the exhaust gas pipeline (16) is reduced when the refrigeration system is in a first refrigeration mode; the heat exchange mechanism (30) is thermally coupled to the return gas pipeline (15) through at least one heat exchanger (40), so that the temperature of the refrigerant in the return gas pipeline (15) is reduced when the refrigeration system is in the first refrigeration mode and / or the temperature of the refrigerant in the return gas pipeline (15) is increased when the refrigeration system is in a second refrigeration mode.

2. The refrigeration system according to claim 1, characterized in that: The heat exchange mechanism (30) comprises: A coolant circuit (31), wherein the coolant circuit (31) is thermally coupled to the exhaust pipeline (16) via the exhaust gas cooler (20); The second refrigeration module (32) comprises a throttling mechanism, a second compressor (321) and a second condenser (322), the throttling mechanism comprises a second throttling valve (323), the second compressor (321), the second condenser (322), the second throttling valve (323) and the first condenser (12) are sequentially connected to form a second circulation loop; the secondary refrigerant loop (31) is thermally coupled to the second circulation loop through the second condenser (322); The second refrigeration module (32) further comprises at least one heat exchange pipeline (324), and two ends of each heat exchange pipeline (324) are respectively connected to the output end of the second condenser (322) and the input end of the second compressor (321); each heat exchange pipeline (324) is thermally coupled to the return air pipeline (15) via one of the heat exchangers (40), so that the temperature of the refrigerant in the return air pipeline (15) decreases when the refrigeration system is in the first refrigeration mode and / or increases when the refrigeration system is in the second refrigeration mode.

3. The refrigeration system according to claim 2, characterized in that: The heat exchange pipeline (324) is arranged independently from the second circulation loop.

4. The refrigeration system according to claim 3, characterized in that: The second refrigeration module (32) comprises a heat exchange pipeline (324); One end of the heat exchange pipeline (324) is connected to the output end of the second throttle valve (323), and the other end is connected to the input end of the second compressor (321); the refrigerant in the heat exchange pipeline (324) expands and reduces pressure through the second throttle valve (323) and then flows to the heat exchanger (40), so that the temperature of the refrigerant in the return air pipeline (15) decreases when the refrigeration system is in the first refrigeration mode and the temperature of the refrigerant in the return air pipeline (15) increases when the refrigeration system is in the second refrigeration mode; or One end of the heat exchange pipeline (324) is connected to the output end of the second condenser (322), and the other end is connected to the input end of the second compressor (321). The throttling mechanism also includes a third throttle valve (325). The third throttle valve (325) is arranged on the heat exchange pipeline (324). The refrigerant in the heat exchange pipeline (324) expands and reduces pressure through the third throttle valve (325) and then flows to the heat exchanger (40), so that the temperature of the refrigerant in the return air pipeline (15) decreases when the refrigeration system is in the first refrigeration mode and the temperature of the refrigerant in the return air pipeline (15) increases when the refrigeration system is in the second refrigeration mode.

5. The refrigeration system according to claim 3, characterized in that: The second refrigeration module (32) comprises two heat exchange pipelines (324), each of the heat exchange pipelines (324) being thermally coupled to the return air pipeline (15) via a heat exchanger (40); The refrigerant in one of the heat exchange pipelines (324) is expanded and reduced in pressure through the throttling mechanism and then flows to the heat exchanger (40), so that the temperature of the refrigerant in the return air pipeline (15) is reduced when the refrigeration system is in the first refrigeration mode. The refrigerant in the other heat exchange pipeline (324) is expanded and reduced in pressure through the throttling mechanism and then flows to the second compressor (321), so that the temperature of the refrigerant in the return air pipeline (15) is increased when the refrigeration system is in the second refrigeration mode.

6. The refrigeration system according to claim 3, characterized in that: The refrigeration system further comprises a first control valve (50), wherein the first control valve (50) is arranged on the heat exchange pipeline (324) and is used to control the on-off of the heat exchange pipeline (324).

7. The refrigeration system according to claim 3, characterized in that: The refrigeration system comprises a heat exchange pipeline (324); The heat exchange pipeline (324) serves as a part of the second circulation loop and is located between the output end of the second throttle valve (323) and the input end of the first condenser (12); the refrigerant in the heat exchange pipeline (324) expands and reduces pressure through the second throttle valve (323) and then flows to the heat exchanger (40), so that the temperature of the refrigerant in the return air pipeline (15) decreases when the refrigeration system is in the first refrigeration mode and increases when the refrigeration system is in the second refrigeration mode.

8. The refrigeration system according to claim 2, characterized in that: The secondary refrigerant circuit (31) is thermally coupled to the return air pipeline (15) via a heat exchanger (40).

9. The refrigeration system according to claim 2 or 8, characterized in that: The secondary refrigerant circuit (31) comprises a main circuit (311) and a branch circuit (312), the main circuit (311) is thermally coupled to the second condenser (322), and the branch circuit (312) is thermally coupled to the exhaust gas pipeline (16) through the exhaust gas cooler (20) or is thermally coupled to the return gas pipeline (15) through the heat exchanger (40); or The refrigeration system comprises a plurality of independently arranged brine circuits (31), each of which is thermally coupled to a corresponding structure.

10. The refrigeration system according to claim 2 or 8, characterized in that: The refrigeration system further comprises a second control valve (60), wherein the second control valve (60) is arranged on the refrigerant circuit (31) and is used to control the on-off of the refrigerant circuit (31).

11. The refrigeration system according to claim 2 or 8, characterized in that: The coolant in the coolant circuit (31) is cooling water.

12. A test sorting device, characterized in that: Comprising a refrigeration system as described in any one of claims 1-11.

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