Two-stage circulation compressor system and vehicle
By using a two-stage compression cycle loop in a two-stage compressor system, the compressor's pressure ratio is reduced, solving the problem of excessive compressor power and limited capacity in new energy vehicles when cooling or heating under high and low ambient temperatures, thus improving the compressor's efficiency.
Patent Information
- Application Number
- CN202520089442.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-15
AI Technical Summary
In new energy vehicles, there is a problem of excessive compressor power and limited capacity under high ambient temperature and high load cooling conditions or low ambient temperature and high load heating conditions.
The system employs a two-stage compression cycle, comprising a compressor, a first cooling module, a second cooling module, and a heat exchange module. Through two-stage compression cycle loops, compression, condensation, expansion, and evaporation are performed respectively, reducing the pressure ratio of each compression cycle and keeping the compressor within a suitable operating range.
It improves the efficiency of the compressor and solves the problems of excessive compressor power and limited capacity, making it suitable for refrigeration or heating systems in new energy vehicles.
Smart Images
Figure CN223677990U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vehicle technical field especially two -stage circulation compressor system and vehicle. BACKGROUND
[0002] In new energy automobile, usually use compressor system to refrigerate or heat, and then carry out temperature reduction or temperature rise to power battery.
[0003] Under the high ambient temperature of big load refrigeration working condition, evaporative pressure and evaporative temperature usually belong to normal operation range, but due to the refrigeration load is relatively big, will lead to the high compressor speed, the condensing heat dissipation of whole system is big, and at this time belongs to very high ambient temperature condition, further lead to the condensing pressure and condensing temperature of system is very high, even close to the critical pressure of refrigerant, the pressure ratio of evaporative pressure and condensing pressure of system is too big.Under the low ambient temperature of big load heating working condition, condensing pressure and condensing temperature usually belong to normal operation range, but due to the heating load is relatively big, will lead to the high compressor speed, the evaporative heat absorption of whole system is big, and at this time belongs to very low ambient temperature condition, further lead to the evaporative pressure and evaporative temperature of system is very low, even close to negative pressure, the pressure ratio of evaporative pressure and condensing pressure of system is too big.Obviously, under the high ambient temperature of big load refrigeration working condition or the low ambient temperature of big load heating working condition, the compressor power is too big, and the capacity is limited. SUMMARY
[0004] According to one aspect of the utility model, the utility model provides two -stage circulation compressor system to solve the problem that the compressor power is too big and the capacity is limited in prior art under the high ambient temperature of big load refrigeration working condition or the low ambient temperature of big load heating working condition.
[0005] In order to achieve the above object, the utility model adopts the following technical scheme:
[0006] Two -stage circulation compressor system, comprising:
[0007] Compressor for compressing gaseous refrigerant, the compressor has suction port for gaseous refrigerant to enter and intermediate air inlet, and has intermediate exhaust port for gaseous refrigerant to discharge and exhaust port, the suction port is communicated with the intermediate exhaust port, and the intermediate air inlet is communicated with the exhaust port;
[0008] First cooling module has first inlet end and first outlet end, the first inlet end is communicated with the exhaust port, and the first cooling module is used to liquefy and expand gaseous refrigerant, and the first outlet end is communicated with the intermediate air inlet through heat exchange module;
[0009] a second cooling module having a second inlet end and a second outlet end, the second inlet end being in communication with the intermediate exhaust port through the heat exchange module, the second cooling module being used for expanding the refrigerant and exchanging heat with external structure, the second outlet end being in communication with the suction port;
[0010] the heat exchange module is used for exchanging heat between the refrigerant discharged through the first outlet end and the refrigerant discharged through the intermediate exhaust port.
[0011] As a preferred solution of the two-stage cycle compressor system, the heat exchange module is a heat exchanger having a first heat exchange inlet end, a first heat exchange outlet end, a second heat exchange inlet end and a second heat exchange outlet end, the first heat exchange inlet end being in communication with the first outlet end, the first heat exchange outlet end being in communication with the intermediate air supplement port, the second heat exchange inlet end being in communication with the intermediate exhaust port, the second heat exchange outlet end being in communication with the second inlet end, the heat exchanger being used for exchanging heat between the refrigerant entering through the first heat exchange inlet end and the refrigerant entering through the second heat exchange inlet end.
[0012] As a preferred solution of the two-stage cycle compressor system, the heat exchange module is a gas-liquid separator having a mixing inlet end, a liquid outlet end and a gas outlet end, the mixing inlet end being in communication with the first outlet end and the intermediate exhaust port at the same time, the liquid outlet end being in communication with the second inlet end, the gas outlet end being in communication with the intermediate air supplement port, the gas-liquid separator being used for mixing and exchanging heat between the refrigerant discharged through the first outlet end and the refrigerant discharged through the intermediate exhaust port, and discharging liquid refrigerant through the liquid outlet end and discharging gaseous refrigerant through the gas outlet end.
[0013] As a preferred solution of the two-stage cycle compressor system, the first cooling module comprises a condenser and a first expansion valve connected with the condenser, the first inlet end being arranged at the condenser, the first outlet end being arranged at the first expansion valve, the condenser being used for liquefying gaseous refrigerant, and the liquefied refrigerant being able to flow to the first expansion valve, the first expansion valve being used for expanding the liquid refrigerant.
[0014] As a preferred solution of the two-stage cycle compressor system, the condenser is connected with the first expansion valve through a first liquid storage tank, the first liquid storage tank being used for storing liquid refrigerant.
[0015] As a preferred solution of the two-stage cycle compressor system, the first expansion valve is an electromagnetic expansion valve.
[0016] As the preferred scheme of the secondary circulation compressor system, the second cooling module comprises a second expansion valve and a cooler connected with the second expansion valve, the second inlet end is arranged at the second expansion valve, the second outlet end is arranged at the cooler, the second expansion valve is used for expanding the refrigerant, and the expanded refrigerant can flow to the cooler, and the cooler is used for heat exchange between the refrigerant and an external structure.
[0017] As the preferred scheme of the secondary circulation compressor system, the second expansion valve is connected with the heat exchange module through a second liquid storage tank, and the second liquid storage tank is used for storing liquid refrigerant.
[0018] As the preferred scheme of the secondary circulation compressor system, the compressor has a first gas flow channel and a second gas flow channel, the suction port is communicated with the first gas flow channel, the first gas flow channel is communicated with the intermediate exhaust port, the intermediate supplement gas port is communicated with the second gas flow channel, and the second gas flow channel is communicated with the exhaust port.
[0019] According to another aspect of the utility model, provide vehicle, including above -mentioned secondary circulation compressor system, still include power battery, second cooling module can with power battery heat exchange.
[0020] The utility model discloses the beneficial effect is:
[0021] The utility model provides a two-stage circulation compressor system, including compressor, first cooling module, second cooling module and heat exchange module. Compressor is used for compressing gaseous refrigerant, and the compressor has a suction port for gase gas refrigerant to enter and an intermediate air inlet, and has an intermediate exhaust port for gaseous refrigerant to discharge and an exhaust port, the suction port is communicated with the intermediate exhaust port, and the intermediate air inlet is communicated with the exhaust port, so that the gaseous refrigerant entering through the suction port can be compressed by the compressor, and the compressed gaseous refrigerant is discharged from the intermediate exhaust port, in addition, the gaseous refrigerant entering through the intermediate air inlet is compressed by the compressor, and the compressed gaseous refrigerant is discharged from the exhaust port. The first cooling module has a first inlet end and a first outlet end, the first inlet end is communicated with the exhaust port, and the first cooling module is used for liquefying and expanding the gaseous refrigerant, in the process of liquefying, the gaseous refrigerant compressed by the compressor condenses and releases heat, and expands. The first outlet end is communicated with the intermediate air inlet through the heat exchange module, the second cooling module has a second inlet end and a second outlet end, the second inlet end is communicated with the intermediate exhaust port through the heat exchange module, and the heat exchange module is used for heat exchange between the refrigerant discharged through the first outlet end and the refrigerant discharged through the intermediate exhaust port, so that the refrigerant expanded through the first cooling module is heat exchanged with the refrigerant compressed by the compressor and discharged through the intermediate exhaust port, the refrigerant expanded through the first cooling module evaporates and absorbs heat, forms high-temperature refrigerant, the refrigerant discharged through the intermediate exhaust port condenses and releases heat, forms low-temperature refrigerant, the high-temperature refrigerant flows back to the compressor through the intermediate air inlet, and the low-temperature refrigerant flows to the second cooling module, and the second cooling module is used for expanding the low-temperature refrigerant and heat exchanging with the external structure, so that the external structure is cooled, and the refrigerant evaporates and absorbs heat again, and becomes gaseous again, the second outlet end is communicated with the suction port, so that the gaseous refrigerant flows into the compressor and circulates again. In the two-stage circulation compressor system, the first-stage compression circulation loop is formed through the suction port, the intermediate exhaust port and the second cooling module, and the refrigerant is compressed, condensed, expanded and evaporated in sequence, so that the external structure is cooled, in addition, the second-stage compression circulation loop is formed through the intermediate air inlet, the exhaust port and the first cooling module, and the refrigerant is compressed, condensed, expanded and evaporated in sequence, so that the refrigerant in the first-stage compression circulation loop is cooled and cooled through the heat exchange module, and condenses, so that the pressure ratio of each stage of compression circulation can be reduced, the compressor is in a more suitable working range, and the efficiency of the compressor is improved.
[0022] The utility model also provides vehicle, including above-mentioned two stage circulation compressor system, still include power battery, second cooling module can exchange heat with power battery, in this two stage circulation compressor system, through suction port, intermediate exhaust port and second cooling module form first stage compression circulation loop, refrigerant carries out compression, condensation, expansion, evaporation in proper order to cool down power battery, in addition, through intermediate air supplement port, exhaust port and first cooling module form second stage compression circulation loop, refrigerant carries out compression, condensation, expansion, evaporation in proper order to cool down the refrigerant in first stage compression circulation loop through heat exchange module, make it condense, like this can reduce the pressure ratio in each stage compression circulation, make compressor be in more suitable working range to improve the efficiency of compressor. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the structure schematic diagram of two stage circulation compressor system in the utility model embodiment one;
[0024] Figure 2 It is the structure schematic diagram of compressor in the utility model embodiment one;
[0025] Figure 3 It is the sectional view of compressor in the utility model embodiment one;
[0026] Figure 4 It is the structure schematic diagram of two stage circulation compressor system in the utility model embodiment two;
[0027] Figure 5 It is the structure schematic diagram of two stage circulation compressor system in the utility model embodiment three;
[0028] Figure 6 It is the structure schematic diagram of two stage circulation compressor system in the utility model embodiment four.
[0029] In the drawing:
[0030] 1, compressor; 101, suction port; 102, intermediate exhaust port; 1021, intermediate exhaust port communication flow channel; 103, intermediate air supplement port; 1031, intermediate air supplement port communication flow channel; 104, exhaust port; 1041, exhaust port communication flow channel; 105, first gas flow channel; 106, second gas flow channel;
[0031] 2, first cooling module; 21, condenser; 22, first expansion valve; 23, first liquid storage tank;
[0032] 3, second cooling module; 31, second expansion valve; 32, cooler; 33, second liquid storage tank;
[0033] 4, heat exchanger; 401, first heat exchange inlet end; 402, first heat exchange outlet end; 403, second heat exchange inlet end; 404, second heat exchange outlet end;
[0034] 5, gas-liquid separator; 501, mixing inlet end; 502, liquid outlet end; 503, gas outlet end. DETAILED DESCRIPTION
[0035] The utility model will be described in further detail below in connection with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the utility model and are not a limitation on the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0036] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0037] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0038] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.
[0039] Embodiment one
[0040] In a new energy vehicle, a compressor system is usually used for refrigeration or heating, so as to cool or heat the power battery. However, in the high ambient temperature and large load refrigeration working condition or the low ambient temperature and large load heating working condition, the problem of excessive compressor power and limited capacity will occur.
[0041] To solve the above problems, the embodiment provides a two-stage circulating compressor system to solve the problem of excessive compressor power and limited capacity in the high ambient temperature and large load refrigeration working condition or the low ambient temperature and large load heating working condition in the prior art, and can be used in the technical field of vehicles.
[0042] Reference Figure 1The two-stage circulation compressor system comprises a compressor 1, a first cooling module 2, a second cooling module 3 and a heat exchange module. The compressor 1 is used for compressing gaseous refrigerant. The compressor 1 has a suction port 101 for the gaseous refrigerant to enter and an intermediate supplement gas port 103, and has an intermediate exhaust port 102 and an exhaust port 104 for the gaseous refrigerant to be discharged. The suction port 101 is communicated with the intermediate exhaust port 102, and the intermediate supplement gas port 103 is communicated with the exhaust port 104, so that the gaseous refrigerant entering through the suction port 101 can be compressed by the compressor 1, and the compressed gaseous refrigerant is discharged from the intermediate exhaust port 102. In addition, the gaseous refrigerant entering through the intermediate supplement gas port 103 is compressed by the compressor 1, and the compressed gaseous refrigerant is discharged from the exhaust port 104. The first cooling module 2 has a first inlet end and a first outlet end. The first inlet end is communicated with the exhaust port 104, and the first cooling module 2 is used for liquefying and expanding the gaseous refrigerant. In the process of liquefying, the gaseous refrigerant compressed by the compressor 1 is condensed and releases heat, and then is expanded. The first outlet end is communicated with the intermediate supplement gas port 103 through the heat exchange module. The second cooling module 3 has a second inlet end and a second outlet end. The second inlet end is communicated with the intermediate exhaust port 102 through the heat exchange module. The heat exchange module is used for heat exchange between the refrigerant discharged through the first outlet end and the refrigerant discharged through the intermediate exhaust port 102, so that the refrigerant expanded through the first cooling module 2 is heat-exchanged with the refrigerant compressed by the compressor 1 and discharged through the intermediate exhaust port 102. The refrigerant expanded through the first cooling module 2 evaporates and absorbs heat to form high-temperature refrigerant. The refrigerant discharged through the intermediate exhaust port 102 condenses and releases heat to form low-temperature refrigerant. The high-temperature refrigerant flows back to the compressor 1 through the intermediate supplement gas port 103, and the low-temperature refrigerant flows to the second cooling module 3. The second cooling module 3 is used for expanding the low-temperature refrigerant and heat-exchanging with the external structure to cool the external structure and evaporate the refrigerant to be gaseous again. The second outlet end is communicated with the suction port 101, so that the gaseous refrigerant flows into the compressor 1 to circulate again. In the two-stage circulation compressor system, a first-stage compression circulation loop is formed by the suction port 101, the intermediate exhaust port 102 and the second cooling module 3. The refrigerant is compressed, condensed, expanded and evaporated in sequence to cool and lower the temperature of the external structure. In addition, a second-stage compression circulation loop is formed by the intermediate supplement gas port 103, the exhaust port 104 and the first cooling module 2. The refrigerant is also compressed, condensed, expanded and evaporated in sequence to cool and lower the temperature of the refrigerant in the first-stage compression circulation loop through the heat exchange module to condense the refrigerant. In this way, the pressure ratio of each stage of compression circulation can be reduced, the compressor 1 can be in a more appropriate working range, and the efficiency of the compressor 1 can be improved.Specifically, in this way, the pressure ratio of each compression cycle can be reduced by a factor of two, for example, the pressure ratio of the large load refrigeration working condition at high ring temperature is 25, in this two-stage compression system, the pressure ratio of the compressor 1 in the first stage compression cycle loop and the second stage compression cycle loop can be reduced to 5.
[0043] With reference to the foregoing Figure 1 In this embodiment, the heat exchange module is a heat exchanger 4, the heat exchanger 4 has a first heat exchange inlet end 401, a first heat exchange outlet end 402, a second heat exchange inlet end 403, and a second heat exchange outlet end 404, the first heat exchange inlet end 401 is in communication with the first outlet end, the first heat exchange outlet end 402 is in communication with the intermediate air supply port 103, the second heat exchange inlet end 403 is in communication with the intermediate exhaust port 102, and the second heat exchange outlet end 404 is in communication with the second inlet end, the heat exchanger 4 is used for heat exchange between the refrigerant entering through the first heat exchange inlet end 401 and the refrigerant entering through the second heat exchange inlet end 403, so that the refrigerant in the first stage compression cycle loop and the refrigerant in the second stage compression cycle loop are heat exchanged, the refrigerant in the first stage compression cycle loop is cooled and further condensed to cool the external structure, while the refrigerant in the second stage compression cycle loop is evaporated by heat and then enters the compressor 1 through the flow to the intermediate air supply port 103 and is compressed again.
[0044] With reference to the foregoing Figure 1 The first cooling module 2 specifically includes a condenser 21 and a first expansion valve 22 connected with the condenser 21, the first inlet end is arranged at the condenser 21, the input end of the condenser 21 is in communication with the exhaust port 104, and the first outlet end is arranged at the first expansion valve 22, the output end of the first expansion valve 22 is in communication with the intermediate air supply port 103 through the heat exchange module. The condenser 21 is used for liquefying the gaseous refrigerant, and the liquefied refrigerant can flow to the first expansion valve 22, and the first expansion valve 22 is used for expanding the liquid refrigerant. Optionally, the first expansion valve 22 is an electromagnetic expansion valve, so as to realize automatic control of the first expansion valve 22.
[0045] With reference to the foregoing Figure 1 The second cooling module 3 specifically includes a second expansion valve 31 and a cooler 32 connected with the second expansion valve 31, the second inlet end is arranged at the second expansion valve 31, the input end of the second expansion valve 31 is in communication with the intermediate exhaust port 102 through the heat exchange module, the second outlet end is arranged at the cooler 32, and the output end of the cooler 32 is in communication with the suction port 101. The second expansion valve 31 is used for expanding the refrigerant, and the expanded refrigerant can flow to the cooler 32, and the cooler 32 is used for heat exchange between the refrigerant and the external structure. Optionally, the second expansion valve 31 is an electromagnetic expansion valve, so as to realize automatic control of the second expansion valve 31.
[0046] With reference to the foregoingFigures 1-3 The compressor 1 has a first gas flow channel 105 and a second gas flow channel 106. The suction port 101 is in communication with the first gas flow channel 105, and the first gas flow channel 105 is in communication with the intermediate exhaust port 102, so that the suction port 101 is in communication with the intermediate exhaust port 102 through the first gas flow channel 105, wherein the intermediate exhaust port 102 is in communication with the first gas flow channel 105 through an intermediate exhaust port communication flow channel 1021. The intermediate air supplement port 103 is in communication with the second gas flow channel 106, and the second gas flow channel 106 is in communication with the exhaust port 104, so that the intermediate air supplement port 103 is in communication with the exhaust port 104 through the second gas flow channel 106, wherein the intermediate air supplement port 103 is in communication with the second gas flow channel 106 through an intermediate air supplement port communication flow channel 1031, and the exhaust port 104 is in communication with the second gas flow channel 106 through an exhaust port communication flow channel 1041. Optionally, the first gas flow channel 105 and the second gas flow channel 106 are both spiral, and the compressor 1 can compress the gaseous refrigerant inside the first gas flow channel 105 and the second gas flow channel 106.
[0047] The working process of the two-stage circulation compressor system in the embodiment will be described below. Figures 1-3 The working process of the two-stage circulation compressor system in the embodiment will be described below.
[0048] In the embodiment, a first-stage compression circulation loop is formed by the suction port 101, the intermediate exhaust port 102, and the second cooling module 3, and a second-stage compression circulation loop is formed by the intermediate air supplement port 103, the exhaust port 104, and the first cooling module 2.
[0049] In the first-stage compression circulation loop, the gaseous refrigerant entering through the suction port 101 is compressed by the compressor 1, and the compressed gaseous refrigerant is discharged from the intermediate exhaust port 102, liquefied into liquid refrigerant after being cooled by the heat exchanger 4, and then flows into the second expansion valve 31 for expansion, and then flows to the cooler 32 to exchange heat with the external structure to cool the external structure, and then the gaseous refrigerant reflows into the compressor 1 through the suction port 101.
[0050] In the second-stage compression circulation loop, the gaseous refrigerant entering through the intermediate air supplement port 103 is compressed by the compressor 1, and the compressed gaseous refrigerant is discharged from the exhaust port 104, liquefied into liquid refrigerant after being cooled by the condenser 21, and then flows into the first expansion valve 22 for expansion, and then flows to the heat exchanger 4 to exchange heat with the gaseous refrigerant in the first-stage compression circulation loop, and at the same time, the liquid refrigerant in the second-stage compression circulation loop evaporates into gaseous refrigerant and reflows into the compressor 1 through the intermediate air supplement port 103.
[0051] Embodiment Two
[0052] The embodiment provides another two-stage circulation compressor system, which is based on the two-stage circulation compressor system in the first embodiment and is additionally provided with a first liquid storage tank 23 and a second liquid storage tank 33.
[0053] With reference to Figure 4 , the condenser 21 is connected with the first expansion valve 22 through the first liquid storage tank 23, and the first liquid storage tank 23 is used for storing liquid refrigerant, so that the condensed liquid refrigerant can be temporarily stored through the first liquid storage tank 23, and the liquid refrigerant flows out of the first liquid storage tank 23 and enters the first expansion valve 22 for expansion when heat exchange is needed.
[0054] With reference to Figure 4 , the second expansion valve 31 is connected with the heat exchange module through the second liquid storage tank 33, and the second liquid storage tank 33 is used for storing liquid refrigerant, so that the condensed liquid refrigerant can be temporarily stored through the second liquid storage tank 33, and the liquid refrigerant flows out of the second liquid storage tank 33 and enters the second expansion valve 31 for expansion when cooling of the external structure is needed.
[0055] Embodiment three
[0056] The embodiment provides another two-stage circulation compressor system, which is different from the two-stage circulation compressor system in the first embodiment in that the specific structure of the heat exchange module is different.
[0057] With reference to Figure 5 , in the embodiment, the heat exchange module is a gas-liquid separator 5, the gas-liquid separator 5 has a mixed inlet end 501, a liquid outlet end 502 and a gas outlet end 503, the mixed inlet end 501 is in communication with the first outlet end and the intermediate exhaust port 102 at the same time, the liquid outlet end 502 is in communication with the second inlet end, and the gas outlet end 503 is in communication with the intermediate air supplement port 103, the gas-liquid separator 5 is used for mixing the refrigerant discharged through the first outlet end with the refrigerant discharged through the intermediate exhaust port 102 and performing heat exchange, and the liquid refrigerant is discharged through the liquid outlet end 502 and the gaseous refrigerant is discharged through the gas outlet end 503. By arranging the gas-liquid separator 5, the refrigerant discharged through the first outlet end is mixed with the refrigerant discharged through the intermediate exhaust port 102 to perform sufficient heat exchange, in the process, the two parts of the refrigerant are mixed, part of the refrigerant is condensed into liquid, and the other part of the refrigerant is evaporated into gas, the liquid refrigerant is discharged through the liquid outlet end 502 and further flows to the second cooling module 3, and the gaseous refrigerant is discharged through the gas outlet end 503 and further flows back to the compressor through the intermediate air supplement port 103.
[0058] The working process of the two-stage circulation compressor system in the embodiment will be introduced below. Figure 5
[0059] In this embodiment, the two-stage compression cycle circuit can also be divided into two stages, that is, the first-stage compression cycle circuit is formed by the suction port 101, the intermediate exhaust port 102, and the second cooling module 3, and the second-stage compression cycle circuit is formed by the intermediate air supply port 103, the exhaust port 104, and the first cooling module 2. However, it should be noted that the two-stage compression cycle circuit will have a junction in the gas-liquid separator 5.
[0060] In the first-stage compression cycle circuit, the gaseous refrigerant can be compressed by the compressor 1 through the gaseous refrigerant entering through the suction port 101, and the compressed gaseous refrigerant is discharged from the intermediate exhaust port 102 and flows into the gas-liquid separator 5. In the gas-liquid separator 5, the refrigerant discharged from the first outlet end is mixed with the refrigerant discharged from the intermediate exhaust port 102 to perform sufficient heat exchange. Subsequently, the condensed liquid refrigerant flows into the second expansion valve 31 for expansion, and then flows to the cooler 32 to perform heat exchange with the external structure to cool the external structure, and then the gaseous refrigerant reflows into the compressor 1 through the suction port 101.
[0061] In the second-stage compression cycle circuit, the gaseous refrigerant entering through the intermediate air supply port 103 is compressed by the compressor 1, and the compressed gaseous refrigerant is discharged from the exhaust port 104 and liquefied into liquid refrigerant after passing through the condenser 21. The liquid refrigerant flows into the first expansion valve 22 for expansion, and then flows into the gas-liquid separator 5. In the gas-liquid separator 5, the refrigerant discharged from the first outlet end is mixed with the refrigerant discharged from the intermediate exhaust port 102 to perform sufficient heat exchange. Subsequently, the evaporated gaseous refrigerant reflows into the compressor 1 through the intermediate air supply port 103.
[0062] Embodiment Four
[0063] This embodiment provides another two-stage cycle compressor system, which is based on the two-stage cycle compressor system in Embodiment Three, and further provided with a first liquid storage tank 23 and a second liquid storage tank 33.
[0064] Referring to Figure 6 , the condenser 21 is connected with the first expansion valve 22 through the first liquid storage tank 23, and the first liquid storage tank 23 is used to store liquid refrigerant, so that the condensed liquid refrigerant can be temporarily stored in the first liquid storage tank 23. When heat exchange is needed, the liquid refrigerant flows out of the first liquid storage tank 23 and enters the first expansion valve 22 for expansion.
[0065] Continuing to refer to Figure 6 , the second expansion valve 31 is connected with the heat exchange module through the second liquid storage tank 33, and the second liquid storage tank 33 is used to store liquid refrigerant, so that the condensed liquid refrigerant can be temporarily stored in the second liquid storage tank 33. When cooling of the external structure is needed, the liquid refrigerant flows out of the second liquid storage tank 33 and enters the second expansion valve 31 for expansion.
[0066] Example five
[0067] The embodiment provides a vehicle, comprising the two-stage circulation compressor system in any one of the above embodiments, the vehicle further comprises a power battery, the second cooling module 3 can exchange heat with the power battery, in the two-stage circulation compressor system, a first-stage compression circulation loop is formed through the suction port 101, the intermediate exhaust port 102 and the second cooling module 3, the refrigerant is compressed, condensed, expanded and evaporated in sequence, so that the power battery is cooled and cooled, in addition, a second-stage compression circulation loop is formed through the intermediate air supplement port 103, the exhaust port 104 and the first cooling module 2, the refrigerant is also compressed, condensed, expanded and evaporated in sequence, so that the refrigerant in the first-stage compression circulation loop is cooled and condensed through the heat exchange module, so that the pressure ratio in each stage of compression circulation can be reduced, the compressor 1 is in a more suitable working range, and the efficiency of the compressor 1 is improved.
[0068] Obviously, the above embodiment of the utility model is only for clear illustration of the utility model, and is not a limitation on the implementation mode of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all the implementation modes need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A two-stage cycle compressor system, characterized by, Comprise: a compressor (1) for compressing gaseous refrigerant, the compressor (1) having a suction port (101) for gaseous refrigerant to enter and an intermediate charging port (103), and having an intermediate discharge port (102) for gaseous refrigerant to discharge and a discharge port (104), the suction port (101) being in communication with the intermediate discharge port (102), and the intermediate charging port (103) being in communication with the discharge port (104); a first cooling module (2) having a first inlet end and a first outlet end, the first inlet end being in communication with the discharge port (104), the first cooling module (2) being used for liquefying and expanding gaseous refrigerant, and the first outlet end being in communication with the intermediate charging port (103) through a heat exchange module; a second cooling module (3) having a second inlet end and a second outlet end, the second inlet end being in communication with the intermediate discharge port (102) through the heat exchange module, the second cooling module (3) being used for expanding refrigerant and exchanging heat with an external structure, and the second outlet end being in communication with the suction port (101); the heat exchange module is used for exchanging heat between refrigerant discharged through the first outlet end and refrigerant discharged through the intermediate discharge port (102).
2. The two-stage cycle compressor system of claim 1, wherein, the heat exchange module is a heat exchanger (4) having a first heat exchange inlet end (401), a first heat exchange outlet end (402), a second heat exchange inlet end (403), and a second heat exchange outlet end (404), the first heat exchange inlet end (401) being in communication with the first outlet end, the first heat exchange outlet end (402) being in communication with the intermediate charging port (103), the second heat exchange inlet end (403) being in communication with the intermediate discharge port (102), and the second heat exchange outlet end (404) being in communication with the second inlet end, the heat exchanger (4) being used for exchanging heat between refrigerant entering through the first heat exchange inlet end (401) and refrigerant entering through the second heat exchange inlet end (403).
3. The two-stage, cyclic compressor system of claim 1, wherein, the heat exchange module is a gas-liquid separator (5) having a mixing inlet end (501), a liquid outlet end (502), and a gas outlet end (503), the mixing inlet end (501) being in communication with the first outlet end and the intermediate discharge port (102) at the same time, the liquid outlet end (502) being in communication with the second inlet end, and the gas outlet end (503) being in communication with the intermediate charging port (103), the gas-liquid separator (5) being used for mixing and exchanging heat between refrigerant discharged through the first outlet end and refrigerant discharged through the intermediate discharge port (102), and liquid refrigerant being discharged through the liquid outlet end (502) and gaseous refrigerant being discharged through the gas outlet end (503).
4. The two-stage cycle compressor system of any of claims 1-3, wherein, The first cooling module (2) comprises a condenser (21) and a first expansion valve (22) connected with the condenser (21), the first inlet end is arranged at the condenser (21), the first outlet end is arranged at the first expansion valve (22), the condenser (21) is used for liquefying gaseous refrigerant, and the liquefied refrigerant can flow to the first expansion valve (22), and the first expansion valve (22) is used for expanding the liquid refrigerant.
5. The two-stage, cyclic compressor system of claim 4, wherein, The condenser (21) is connected with the first expansion valve (22) through a first liquid storage tank (23), and the first liquid storage tank (23) is used for storing liquid refrigerant.
6. The two-stage, cyclic compressor system of claim 4, wherein, The first expansion valve (22) is an electromagnetic expansion valve.
7. The two-stage cycle compressor system of any of claims 1-3, wherein, The second cooling module (3) comprises a second expansion valve (31) and a cooler (32) connected with the second expansion valve (31), the second inlet end is arranged at the second expansion valve (31), the second outlet end is arranged at the cooler (32), the second expansion valve (31) is used for expanding the refrigerant, and the expanded refrigerant can flow to the cooler (32), and the cooler (32) is used for heat exchange between the refrigerant and the external structure.
8. The two-stage cycle compressor system of claim 7, wherein, The second expansion valve (31) is connected with the heat exchange module through a second liquid storage tank (33), and the second liquid storage tank (33) is used for storing liquid refrigerant.
9. The two-stage cycle compressor system of any of claims 1-3, wherein, The compressor (1) has a first gas flow channel (105) and a second gas flow channel (106), the suction port (101) is communicated with the first gas flow channel (105), the first gas flow channel (105) is communicated with the intermediate exhaust port (102), the intermediate air supplement port (103) is communicated with the second gas flow channel (106), and the second gas flow channel (106) is communicated with the exhaust port (104).
10. Vehicle, characterized in that The two-stage circulation compressor system comprises a power battery, and the second cooling module (3) can be in heat exchange with the power battery.