Double-temperature cooling and heating system for transportation and working method of double-temperature cooling and heating system

Abstract

The invention discloses a double-temperature cooling and heating system for transportation. Comprising a compressor, an oil separator, a four-way reversing valve, a gas-liquid separator, a first electromagnetic valve, an outdoor heat exchanger, a liquid storage device, a drying filter, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a first indoor air-cooling evaporation-condensation integrated heat exchanger, a fourth electronic expansion valve and a second indoor air-cooling evaporation-condensation integrated heat exchanger. A second solenoid valve, a third solenoid valve, a fourth solenoid valve and a fifth solenoid valve; the first indoor air cooling, evaporation and condensation integrated heat exchanger and the second indoor air cooling, evaporation and condensation integrated heat exchanger can only serve as evaporators and condensers or serve as the evaporators and the condensers at the same time. Free combined operation of three working modes of refrigeration, heating and constant-temperature dehumidification in the two transportation bins can be achieved, different temperature and humidity requirements of the two transportation bins are met at the same time, a hot gas bypass or electric heating mode is not needed, and therefore the defects caused by the hot gas bypass or electric heating mode are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerated transportation, and in particular to a dual-temperature cooling and heating system for transportation and a working method thereof. Background Art

[0002] Transport refrigeration equipment is primarily used in road and rail transport scenarios, such as refrigerated trucks and refrigerated containers, transporting a wide variety of goods, including fruits and vegetables, frozen and fresh meat, and pharmaceuticals. Different cargo types require different transport temperatures, leading to the emergence of dual-temperature refrigerated trucks in the cold chain transport sector. Currently available dual-temperature refrigeration units for transport offer cooling, heating, and defrosting functions, but lack constant temperature dehumidification. Therefore, current dual-temperature refrigeration units on the market cannot meet the specific temperature and humidity control requirements for cargo. Furthermore, current dual-temperature refrigeration units for transport use heat and defrost functions through hot gas bypass or electric heating. Hot gas bypass directly directs the compressor exhaust gas into the evaporator to release heat, which then returns to the compressor. This prevents simultaneous heating and cooling operations and can easily cause compressor liquid compression, shortening compressor life, particularly for electric scroll and rotary compressors. Electric heating can operate simultaneously with cooling, but at a higher energy cost. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies of the existing technology and thus provide a dual-temperature heating and cooling system for transportation and a working method thereof. The present invention can realize the free combination operation of three working modes of refrigeration, heating and constant temperature dehumidification in two transport warehouses, while meeting the different temperature and humidity requirements of the two transport warehouses, without the need for hot air bypass or electric heating, thereby avoiding the disadvantages brought about by hot air bypass or electric heating.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a dual-temperature cooling and heating system for transportation, including a compressor, an oil separator, a four-way reversing valve, a gas-liquid separator, a first solenoid valve, an outdoor heat exchanger, a liquid reservoir, a drying filter, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a first indoor air-cooled evaporative condensing integrated heat exchanger, a fourth electronic expansion valve, a second indoor air-cooled evaporative condensing integrated heat exchanger, a second solenoid valve, a third solenoid valve, a fourth solenoid valve and a fifth solenoid valve; The first indoor air-cooled evaporative condensing integrated heat exchanger is arranged in the first transport warehouse, and the first indoor air-cooled evaporative condensing integrated heat exchanger can be used only as an evaporator, a condenser, or as an evaporator and a condenser at the same time to achieve cooling, heating or constant temperature dehumidification; the first indoor air-cooled evaporative condensing integrated heat exchanger includes a first front heat exchange core and a first rear heat exchange core arranged in parallel front and back, the supply air side of the first indoor air-cooled evaporative condensing integrated heat exchanger is located at the front side of the first front heat exchange core, and the return air side of the first indoor air-cooled evaporative condensing integrated heat exchanger is located at the rear side of the first rear heat exchange core, and the compressor, oil separator, four-way reversing valve, second solenoid valve, first front heat exchange core, fourth electronic expansion valve, fifth solenoid valve, first rear heat exchange core and gas-liquid separator are connected by pipelines to form a first circulation loop; The second indoor air-cooled evaporative condensing integrated heat exchanger is arranged in the second transport warehouse, and the second indoor air-cooled evaporative condensing integrated heat exchanger can be used only as an evaporator, a condenser, or as an evaporator and a condenser at the same time to achieve cooling, heating or constant temperature dehumidification; the second indoor air-cooled evaporative condensing integrated heat exchanger includes a second front heat exchange core and a second rear heat exchange core arranged in parallel, the supply air side of the second indoor air-cooled evaporative condensing integrated heat exchanger is located at the front side of the second front heat exchange core, and the return air side of the second indoor air-cooled evaporative condensing integrated heat exchanger is located at the rear side of the second rear heat exchange core, and the compressor, oil separator, four-way reversing valve, third solenoid valve, second front heat exchange core, second electronic expansion valve, fourth solenoid valve, second rear heat exchange core and gas-liquid separator are connected through pipelines to form a second circulation loop; The pipeline between the fourth electronic expansion valve and the fifth solenoid valve is connected to the pipeline between the second electronic expansion valve and the fourth solenoid valve via a first branch; The first solenoid valve, the outdoor heat exchanger, the liquid reservoir, the filter drier, and the first electronic expansion valve are connected by a pipeline to form a second branch, one end of the second branch is connected to the first branch, and the other end of the second branch is connected to the pipeline between the four-way reversing valve and the third solenoid valve or between the four-way reversing valve and the second solenoid valve; The pipeline between the fourth solenoid valve and the second rear heat exchanger is connected to the pipeline between the drying filter and the first electronic expansion valve through a third branch, and the third electronic expansion valve is arranged on the third branch; The return air sides of the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both provided with return air temperature sensors, and the two return air temperature sensors respectively correspond to real-time detection of the temperature in the first transport warehouse and the second transport warehouse, so that when constant temperature dehumidification is performed in the first transport warehouse and / or the second transport warehouse, the first solenoid valve and the outdoor heat exchanger are opened according to the temperature in the first transport warehouse and / or the second transport warehouse, so that the outdoor heat exchanger is used as a condenser.

[0005] A method for operating a dual-temperature heating and cooling system for transportation, including the following operating modes: (1) Dual cooling mode: The outdoor heat exchanger is used as a condenser, while the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both used only as evaporators, cooling at the same time; (2) Single cooling mode, divided into two cases: The first scenario: The outdoor heat exchanger is used as a condenser, while the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for independent cooling, and the second indoor air-cooled evaporative condensing integrated heat exchanger is on standby. The second situation: the outdoor heat exchanger is used as a condenser, while the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for independent cooling, and the first indoor air-cooled evaporative condensing integrated heat exchanger is on standby; (3) Dual heating mode: The outdoor heat exchanger is used as an evaporator, while the first indoor air-cooled evaporation-condensing integrated heat exchanger and the second indoor air-cooled evaporation-condensing integrated heat exchanger are both used only as condensers, generating heat at the same time; (IV) Heating mode only, divided into two situations: The first scenario: The outdoor heat exchanger is used as an evaporator, while the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating, and the second indoor air-cooled evaporative condensing integrated heat exchanger is on standby. The second situation: the outdoor heat exchanger is used as an evaporator, while the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating, and the first indoor air-cooled evaporative condensing integrated heat exchanger is on standby; (V) Cooling and heating only mode, divided into two cases: The first scenario: The outdoor heat exchanger is on standby, and the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating. At the same time, the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for cooling. The second scenario: The outdoor heat exchanger is on standby, while the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating. At the same time, the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for cooling. (6) Dual constant temperature dehumidification mode: The first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both used as condensers and evaporators at the same time, so that the air in the first transport bin and the second transport bin is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger can simultaneously perform constant temperature dehumidification; during this process, when the temperature in the first transport bin and the second transport bin rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensation load to the outdoors, otherwise it is on standby, thereby ensuring that the temperature in the first transport bin and the second transport bin is constant within the set temperature range; (VII) Single constant temperature dehumidification mode, divided into two situations: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, allowing the first indoor air-cooled evaporative condensing integrated heat exchanger to independently maintain a constant temperature and dehumidify. The second indoor air-cooled evaporative condensing integrated heat exchanger is on standby. During this process, if the temperature in the first transport compartment rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensing load to the outdoors. Otherwise, it is on standby, thereby ensuring that the temperature in the first transport compartment is constant within the set temperature range. The second scenario: The second indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the second transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase. This allows the second indoor air-cooled evaporative condensing integrated heat exchanger to independently maintain a constant temperature and dehumidify. The first indoor air-cooled evaporative condensing integrated heat exchanger is on standby. During this process, if the temperature in the second transport compartment rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensing load to the outdoors. Otherwise, it is on standby, thereby ensuring that the temperature in the second transport compartment is constant within the set temperature range. (8) Single cooling and constant temperature dehumidification mode, divided into two cases: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase. This allows the first indoor air-cooled evaporative condensing integrated heat exchanger to independently maintain a constant temperature and dehumidify. The second indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator and provides cooling. The outdoor heat exchanger is used as a condenser. The second scenario: The second indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the second transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase. The second indoor air-cooled evaporative condensing integrated heat exchanger is used alone for constant temperature dehumidification. The first indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator and for cooling alone. The outdoor heat exchanger is used as a condenser. (IX) Single heating and constant temperature dehumidification mode, divided into two situations: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, so that the first indoor air-cooled evaporative condensing integrated heat exchanger is used alone for constant temperature dehumidification. The second indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser and provides heating alone. During this process, if the temperature in the first transport compartment rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensing load to the outdoors. Otherwise, it is on standby, thereby ensuring that the temperature in the first transport compartment is constant within the set temperature range. The second situation: the second indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator, so that the air in the second transport warehouse is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the second indoor air-cooled evaporative condensing integrated heat exchanger can dehumidify at a constant temperature alone; the first indoor air-cooled evaporative condensing integrated heat exchanger is only used as a condenser and generates heat alone; during this process, when the temperature in the second transport warehouse rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensation load to the outdoors, otherwise it will be on standby, thereby ensuring that the temperature in the second transport warehouse is constant within the set temperature range.

[0006] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the present invention designs a dual-temperature heating and cooling system for transportation, and respectively arranges a first indoor air-cooled evaporative condensing integrated heat exchanger and a second indoor air-cooled evaporative condensing integrated heat exchanger in the first transport warehouse and the second transport warehouse. The first indoor air-cooled evaporative condensing integrated heat exchanger includes a first front heat exchange core and a first rear heat exchange core arranged in parallel front and back. The first front heat exchange core and the first rear heat exchange core can work as needed in the system, so that the first indoor air-cooled evaporative condensing integrated heat exchanger can be used as only an evaporator, a condenser, or as both an evaporator and a condenser at the same time, so as to realize cooling, heating or constant temperature dehumidification, and meet the temperature requirements of the first transport warehouse. Similarly, The second indoor air-cooled evaporative condensing integrated heat exchanger includes a second front heat exchange core and a second rear heat exchange core arranged in parallel front and back. The second front heat exchange core and the second rear heat exchange core can work as needed in the system, so that the second indoor air-cooled evaporative condensing integrated heat exchanger can also be used only as an evaporator, condenser, or as an evaporator and condenser at the same time to achieve cooling, heating or constant temperature dehumidification to meet the temperature requirements of the second transport warehouse; the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger can be independently and freely combined to operate according to the requirements of the first transport warehouse and the second transport warehouse, and up to 15 working modes can be obtained to meet the different temperature and humidity requirements of the first transport warehouse and the second transport warehouse. This dual-temperature heating and cooling system for transportation does not require hot gas bypass or electric heating when heating, which avoids the liquid compression problem of the compressor caused by hot gas bypass, ensures the service life of the compressor, and avoids the high energy consumption problem caused by electric heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the dual-temperature heating and cooling system for transportation of the present invention.

[0008] Figure 2 It is a schematic diagram of the dual cooling mode principle of the dual-temperature heating and cooling system for transportation of the present invention.

[0009] Figure 3 This is a schematic diagram of the principle of the first case of the single cooling mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0010] Figure 4 This is a schematic diagram of the second case of the single cooling mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0011] Figure 5 It is a schematic diagram of the dual heating mode principle of the dual-temperature heating and cooling system for transportation of the present invention.

[0012] Figure 6 This is a schematic diagram of the principle of the first case of the single heating mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0013] Figure 7 1 is a schematic diagram showing the principle of the second case of the single heating mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0014] Figure 8 This is a schematic diagram of the principle of the first case of the single cooling and single heating mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0015] Figure 9 This is a schematic diagram showing the principle of the second case of the single cooling and single heating mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0016] Figure 10 It is a schematic diagram of the principle of the dual constant temperature dehumidification mode of the dual temperature heating and cooling system for transportation of the present invention.

[0017] Figure 11 This is a schematic diagram of the principle of the first case of the single constant temperature dehumidification mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0018] Figure 12 This is a schematic diagram of the principle of the second situation of the single constant temperature dehumidification mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0019] Figure 13 This is a schematic diagram of the principle of the first case of the single cooling and single constant temperature dehumidification mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0020] Figure 14This is a schematic diagram of the principle of the second case of the single cooling and single constant temperature dehumidification mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0021] Figure 15 This is a schematic diagram of the principle of the first case of the single heating and single constant temperature dehumidification mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0022] Figure 16 This is a schematic diagram of the principle of the second situation of the single heating and single constant temperature dehumidification mode of the dual-temperature heating and cooling system for transportation of the present invention.

[0023] In the figure: 1. Compressor; 2. Oil separator; 3. Four-way reversing valve; 4. First solenoid valve; 5. Outdoor heat exchanger; 6. Liquid reservoir; 7. Dry filter; 8. First electronic expansion valve; 9. Second electronic expansion valve; 10. Third electronic expansion valve; 11. Second indoor air-cooled evaporative-condensing integrated heat exchanger; 11-1. Second front heat exchange core; 11-2. Second rear heat exchange core; 12. Fourth electronic expansion valve; 13. First indoor air-cooled evaporative-condensing integrated heat exchanger; 13-1. First front heat exchange core; 13-2. First rear heat exchange core; 14. Second solenoid valve; 15. Third solenoid valve; 16. Gas-liquid separator; 17. Fourth solenoid valve; 18. Fifth solenoid valve; 19. Return air temperature sensor; 20. Supply air temperature sensor. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0025] The arrows in the figure indicate the flow direction of the refrigerant.

[0026] like Figure 1 As shown, this embodiment provides a dual-temperature cooling and heating system for transportation, including a compressor 1, an oil separator 2, a four-way reversing valve 3, a gas-liquid separator 16, a first solenoid valve 4, an outdoor heat exchanger 5, a liquid reservoir 6, a drying filter 7, a first electronic expansion valve 8, a second electronic expansion valve 9, a third electronic expansion valve 10, a first indoor air-cooled evaporative condensing integrated heat exchanger 13, a fourth electronic expansion valve 12, a second indoor air-cooled evaporative condensing integrated heat exchanger 11, a second solenoid valve 14, a third solenoid valve 15, a fourth solenoid valve 17, and a fifth solenoid valve 18; The first indoor air-cooled evaporative condensing integrated heat exchanger 13 is arranged in the first transport warehouse. The first indoor air-cooled evaporative condensing integrated heat exchanger 13 can be used only as an evaporator, a condenser, or as an evaporator and a condenser at the same time to achieve cooling, heating or constant temperature dehumidification; the first indoor air-cooled evaporative condensing integrated heat exchanger 13 includes a first front heat exchange core 13-1 and a first rear heat exchange core 13-2 arranged in parallel front and back, the supply air side of the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is located at the front side of the first front heat exchange core 13-1, and the return air side of the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is located at the rear side of the first rear heat exchange core 13-2, the compressor 1, the oil separator 2, the four-way reversing valve 3, the second solenoid valve 14, the first front heat exchange core 13-1, the fourth electronic expansion valve 12, the fifth solenoid valve 18, the first rear heat exchange core 13-2 and the gas-liquid separator 16 are connected by pipelines to form a first circulation loop; The second indoor air-cooled evaporative condensing integrated heat exchanger 11 is arranged in the second transport warehouse. The second indoor air-cooled evaporative condensing integrated heat exchanger 11 can be used only as an evaporator, a condenser, or as an evaporator and a condenser at the same time to achieve cooling, heating or constant temperature dehumidification; the second indoor air-cooled evaporative condensing integrated heat exchanger 11 includes a second front heat exchange core 11-1 and a second rear heat exchange core 11-2 arranged in parallel, the supply air side of the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is located at the front side of the second front heat exchange core 11-1, and the return air side of the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is located at the rear side of the second rear heat exchange core 11-2, the compressor 1, the oil separator 2, the four-way reversing valve 3, the third solenoid valve 15, the second front heat exchange core 11-1, the second electronic expansion valve 9, the fourth solenoid valve 17, the second rear heat exchange core 11-2 and the gas-liquid separator 16 are connected by pipelines to form a second circulation loop; The pipeline between the fourth electronic expansion valve 12 and the fifth solenoid valve 18 is connected to the pipeline between the second electronic expansion valve 9 and the fourth solenoid valve 17 via a first branch; The first solenoid valve 4, the outdoor heat exchanger 5, the liquid reservoir 6, the filter drier 7, and the first electronic expansion valve 8 are connected by a pipeline to form a second branch. One end of the second branch is connected to the first branch, and the other end of the second branch is connected to the pipeline between the four-way reversing valve 3 and the third solenoid valve 15 or between the four-way reversing valve 3 and the second solenoid valve 14. The pipeline between the fourth solenoid valve 17 and the second post-heat exchanger is connected to the pipeline between the drying filter 7 and the first electronic expansion valve 8 via a third branch, and the third electronic expansion valve 10 is arranged on the third branch; The return air sides of the first indoor air-cooled evaporative condensing integrated heat exchanger 13 and the second indoor air-cooled evaporative condensing integrated heat exchanger 11 are both provided with return air temperature sensors 19 (symbolized as RS in the figure). The two return air temperature sensors 19 respectively correspond to real-time detection of the temperature in the first transport warehouse and the second transport warehouse, so that when constant temperature dehumidification is performed in the first transport warehouse and / or the second transport warehouse, the first solenoid valve 4 and the outdoor heat exchanger 5 are opened according to the temperature in the first transport warehouse and / or the second transport warehouse, so that the outdoor heat exchanger 5 is used as a condenser.

[0027] In other embodiments, the air supply side of the first indoor air-cooled evaporative condensing integrated heat exchanger 13 and the second indoor air-cooled evaporative condensing integrated heat exchanger 11 are both provided with an air supply temperature sensor 20 (symbolized as SS in the figure). The two air supply temperature sensors 20 serve as auxiliary to detect the temperature in the first transport bin and the second transport bin respectively.

[0028] Using the above technical solution, this embodiment also provides a working method of a dual-temperature heating and cooling system for transportation, including the following working modes: (1) Dual cooling mode: the outdoor heat exchanger 5 is used as a condenser, while the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 are both used only as evaporators, and cooling at the same time; The dual cooling mode is as follows: Figure 2As shown, the first solenoid valve 4, the fifth solenoid valve 18, the first electronic expansion valve 8 and the third electronic expansion valve 10 are all open, the second solenoid valve 14, the third solenoid valve 15, the fourth solenoid valve 17, the second electronic expansion valve 9 and the fourth electronic expansion valve 12 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then passes through the first solenoid valve 4 into the outdoor heat exchanger 5, and the outdoor heat exchanger 5 acts as a condenser to condense the high-temperature and high-pressure refrigerant gas into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, and the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid storage 6 and the drying filter 7 in sequence, and then is divided into two paths: one path passes through the first electronic expansion valve 8 to expand into a low-temperature and low-pressure refrigerant liquid, and the low-temperature and low-pressure refrigerant liquid enters the first rear heat exchange core 13-2 for steam. The air in the first transport warehouse is cooled by the first rear heat exchange core 13-2, which is converted into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas then passes through the four-way reversing valve 3 and then through the gas-liquid separator 16 before entering the compressor 1, forming a circuit. In this way, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 only acts as an evaporator to achieve refrigeration. At the same time, the other path is expanded into a low-temperature, low-pressure refrigerant liquid through the third electronic expansion valve 10. The low-temperature, low-pressure refrigerant liquid enters the second rear heat exchange core 11-2 and evaporates into a low-temperature, low-pressure refrigerant gas. The air in the second transport warehouse is cooled by the second rear heat exchange core 11-2, which is converted into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas then passes through the four-way reversing valve 3 and then through the gas-liquid separator 16 before entering the compressor 1, forming another circuit. In this way, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 also only acts as an evaporator to achieve refrigeration. This dual refrigeration mode can meet the simultaneous refrigeration needs of the first and second transport warehouses.

[0029] (2) Single cooling mode, divided into two cases: The first case: the outdoor heat exchanger 5 is used as a condenser, and the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 is used only as an evaporator for cooling alone, and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 is on standby; The first case of single cooling mode is as follows: Figure 3As shown, the first solenoid valve 4, the fifth solenoid valve 18 and the first electronic expansion valve 8 are all open, the second solenoid valve 14, the third solenoid valve 15, the fourth solenoid valve 17, the second electronic expansion valve 9, the third electronic expansion valve 10 and the fourth electronic expansion valve 12 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges the high-temperature and high-pressure refrigerant gas into the oil separator 2, after which the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and then passes through the first solenoid valve 4 into the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as a condenser to condense the high-temperature and high-pressure refrigerant gas into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-pressure refrigerant liquid then flows through the liquid storage tank 6 and the drying filter 7 in sequence, and then expands into a low-temperature and low-pressure refrigerant liquid through the first electronic expansion valve 8. The low-temperature and low-pressure refrigerant liquid enters the first rear heat exchange core 13-2 and evaporates into a low-temperature and low-pressure refrigerant gas. The air in the first transport warehouse that flows through the first rear heat exchange core 13-2 is cooled, and the low-temperature and low-pressure refrigerant gas passes through the four-way reversing valve 3 and the gas-liquid separator 16 and enters the compressor 1 to form a loop. In this way, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 only serves as an evaporator to achieve separate cooling, and the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is on standby.

[0030] The second situation: the outdoor heat exchanger 5 is used as a condenser, and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 is used only as an evaporator for cooling alone, and the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 is on standby; The second case of single cooling mode is as follows: Figure 4 As shown, the first solenoid valve 4 and the third electronic expansion valve 10 are all open, the second solenoid valve 14, the third solenoid valve 15, the fourth solenoid valve 17, the fifth solenoid valve 18, the first electronic expansion valve 8, the second electronic expansion valve 9 and the fourth electronic expansion valve 12 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges the high-temperature and high-pressure refrigerant gas into the oil separator 2, after which the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and then passes through the first solenoid valve 4 into the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as a condenser to condense the high-temperature and high-pressure refrigerant gas into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-pressure refrigerant liquid then flows through the liquid storage tank 6 and the drying filter 7 in sequence, and then expands into a low-temperature and low-pressure refrigerant liquid through the third electronic expansion valve 10. The low-temperature and low-pressure refrigerant liquid enters the second rear heat exchange core 11-2 and evaporates into a low-temperature and low-pressure refrigerant gas. The air flowing through the second rear heat exchange core 11-2 in the second transport warehouse is cooled, and the low-temperature and low-pressure refrigerant gas passes through the four-way reversing valve 3 and the gas-liquid separator 16 and enters the compressor 1 to form a loop. In this way, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 only serves as an evaporator to achieve separate cooling, and the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is on standby.

[0031] According to the above single refrigeration mode, the system can realize independent refrigeration of the first transport warehouse or the second transport warehouse according to the working needs of the first transport warehouse and the second transport warehouse.

[0032] (3) Dual heating mode: The outdoor heat exchanger 5 is used as an evaporator, while the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 are both used only as condensers, generating heat at the same time; Dual heating mode is as follows: Figure 5 As shown, the first solenoid valve 4, the fifth solenoid valve 18, the first electronic expansion valve 8 and the third electronic expansion valve 10 are all open, the second solenoid valve 14, the third solenoid valve 15, the fourth solenoid valve 17, the second electronic expansion valve 9 and the fourth electronic expansion valve 12 are all closed, and the four-way reversing valve 3 is in the reverse cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and is divided into two paths: one path enters the first rear heat exchange core 13-2 cooling The air in the first transport compartment that flows through the first rear heat exchange core 13-2 is heated, and then the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the first electronic expansion valve 8. The low-temperature and low-pressure refrigerant liquid then flows through the liquid storage tank 6 and the drying filter 7 in sequence and enters the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as an evaporator to evaporate the low-temperature and low-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant gas. After passing through the first solenoid valve 4, the air enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1 to form a circuit. In this way, the first indoor air-cooled evaporation and condensation integrated heat exchanger 13 only serves as a condenser to achieve heating; at the same time, the other way enters the second rear heat exchange core 11-2 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, and the air in the second transport warehouse that flows through the second rear heat exchange core 11-2 is heated. Afterwards, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the third electronic expansion valve. The expansion valve 10 expands into a low-temperature, low-pressure refrigerant liquid, which then flows through the liquid storage tank 6 and the drying filter 7 in sequence and enters the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as an evaporator to evaporate the low-temperature, low-pressure refrigerant liquid into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas passes through the first solenoid valve 4 and then enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1 to form another circuit. In this way, the second indoor air-cooled evaporation and condensation integrated heat exchanger 11 also only serves as a condenser to achieve heating. This dual heating mode can meet the needs of simultaneous heating in the first transport warehouse and the second transport warehouse. In addition, the above heating does not require hot gas bypass or electric heating, which avoids the liquid compression problem of the compressor caused by hot gas bypass, ensures the service life of the compressor, and avoids the high energy consumption problem caused by the electric heating method.

[0033] (IV) Heating mode only, divided into two situations: The first case: the outdoor heat exchanger 5 is used as an evaporator, and the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 is used only as a condenser for heating, and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 is on standby; The first case of heating mode only is as follows: Figure 6 As shown, the first solenoid valve 4, the fifth solenoid valve 18 and the first electronic expansion valve 8 are all open, the second solenoid valve 14, the third solenoid valve 15, the fourth solenoid valve 17, the second electronic expansion valve 9, the third electronic expansion valve 10 and the fourth electronic expansion valve 12 are all closed, and the four-way reversing valve 3 is in the reverse cycle position, then the compressor 1 discharges the high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and enters the first rear heat exchange core 13-2 to be condensed into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, then the air in the first transport warehouse flowing through the first rear heat exchange core 13-2 is heated, and then the high-temperature and high-pressure Or the medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the first electronic expansion valve 8. The low-temperature and low-pressure refrigerant liquid then flows through the liquid storage tank 6 and the drying filter 7 in sequence and enters the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as an evaporator to evaporate the low-temperature and low-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas passes through the first solenoid valve 4 and then enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1 to form a loop. In this way, the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 only serves as a condenser to achieve separate heating, and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 is on standby.

[0034] The second situation: the outdoor heat exchanger 5 is used as an evaporator, and the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 is used only as a condenser for heating, and the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 is on standby; The second case of heating mode only is as follows: Figure 7As shown, the first solenoid valve 4 and the third electronic expansion valve 10 are all open, the second solenoid valve 14, the third solenoid valve 15, the fourth solenoid valve 17, the fifth solenoid valve 18, the first electronic expansion valve 8, the second electronic expansion valve 9 and the fourth electronic expansion valve 12 are all closed, and the four-way reversing valve 3 is in the reverse cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and enters the second rear heat exchange core 11-2 to be condensed into high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, then the air in the second transport warehouse flowing through the second rear heat exchange core 11-2 is heated, and then the high-temperature and high-pressure Or the medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the third electronic expansion valve 10. The low-temperature and low-pressure refrigerant liquid then flows through the liquid storage tank 6 and the drying filter 7 in sequence and enters the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as an evaporator to evaporate the low-temperature and low-pressure refrigerant liquid into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas passes through the first solenoid valve 4 and then enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1 to form a loop. In this way, the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 only serves as a condenser to achieve separate heating, and the first indoor air-cooled evaporation-condensing integrated heat exchanger 13 is on standby.

[0035] (V) Cooling and heating only mode, divided into two cases: In the first case, the outdoor heat exchanger 5 is on standby, and the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used only as a condenser for heating. At the same time, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used only as an evaporator for cooling. The first case of single cooling and single heating mode is as follows: Figure 8As shown, the second solenoid valve 14, the fourth electronic expansion valve 12 and the fourth solenoid valve 17 are all open, the first solenoid valve 4, the third solenoid valve 15, the fifth solenoid valve 18, the first electronic expansion valve 8, the second electronic expansion valve 9 and the third electronic expansion valve 10 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and then passes through the second solenoid valve 14 into the first front heat exchange core 13-1 to be condensed into high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, then the air in the first transport warehouse flowing through the first front heat exchange core 13-1 is heated, and then the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant gas is discharged from the compressor 1. The refrigerant liquid expands into a low-temperature, low-pressure refrigerant liquid after passing through the fourth electronic expansion valve 12. The low-temperature, low-pressure refrigerant liquid then passes through the fourth solenoid valve 17 and enters the second rear heat exchange core 11-2 to evaporate into a low-temperature, low-pressure refrigerant gas. The air flowing through the second rear heat exchange core 11-2 in the second transport warehouse is cooled, and the low-temperature, low-pressure refrigerant gas then enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1 to form a loop; in this way, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used only as a condenser to achieve separate heating; at the same time, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used only as an evaporator to achieve separate cooling; the outdoor heat exchanger 5 is on standby.

[0036] The second situation: the outdoor heat exchanger 5 is on standby, and the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used only as a condenser for heating; at the same time, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used only as an evaporator for cooling; The second case of single cooling and single heating mode is as follows: Figure 9As shown, the second solenoid valve 14, the fourth electronic expansion valve 12 and the fourth solenoid valve 17 are all open, the first solenoid valve 4, the third solenoid valve 15, the fifth solenoid valve 18, the first electronic expansion valve 8, the second electronic expansion valve 9 and the third electronic expansion valve 10 are all closed, and the four-way reversing valve 3 is in the reverse cycle position, thereby reversing the refrigerant, that is, the flow direction of the refrigerant is opposite to that in the first case of the single cooling and single heating mode, then the compressor 1 discharges the high-temperature and high-pressure refrigerant gas into the oil separator 2, after which the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and then enters the second rear heat exchange core 11-2 to be condensed into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, then the air in the second transport warehouse flowing through the second rear heat exchange core 11-2 is heated, and then the high-temperature and high-pressure refrigerant gas is discharged from the compressor 1. After the high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the fourth solenoid valve 17, it is expanded into a low-temperature and low-pressure refrigerant liquid through the fourth electronic expansion valve 12. The low-temperature and low-pressure refrigerant liquid then enters the first front heat exchange core 13-1 to evaporate into a low-temperature and low-pressure refrigerant gas. The air flowing through the first front heat exchange core 13-1 in the first transport warehouse is cooled. The low-temperature and low-pressure refrigerant gas passes through the second solenoid valve 14 and enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1 to form a loop; in this way, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is only used as a condenser to achieve separate heating; at the same time, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is only used as an evaporator to achieve separate cooling; the outdoor heat exchanger 5 is on standby.

[0037] (6) Dual constant temperature dehumidification mode: The first indoor air-cooled evaporation-condensation integrated heat exchanger 13 and the second indoor air-cooled evaporation-condensation integrated heat exchanger 11 are both used as condensers and evaporators at the same time, so that the air in the first transport bin and the second transport bin is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the first indoor air-cooled evaporation-condensation integrated heat exchanger 13 and the second indoor air-cooled evaporation-condensation integrated heat exchanger 11 are simultaneously dehumidified at a constant temperature; in this process, when the temperature in the first transport bin and the second transport bin rises beyond the set temperature range, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensation load to the outdoors, otherwise it is on standby, thereby ensuring that the temperature in the first transport bin and the second transport bin is constant within the set temperature range; The dual constant temperature dehumidification mode is as follows: Figure 10As shown, the second solenoid valve 14, the fourth electronic expansion valve 12, the fifth solenoid valve 18, the third solenoid valve 15, the second electronic expansion valve 9 and the fourth solenoid valve 17 are all open, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and is divided into two paths: one path passes through the second solenoid valve 14 and enters the first front heat exchange core 13-1 to be condensed into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, and then The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the fourth electronic expansion valve 12. The low-temperature and low-pressure refrigerant liquid then passes through the fifth solenoid valve 18 and enters the first rear heat exchange core 13-2 to evaporate into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16, and then enters the compressor 1, forming a circuit. The air in the first transport warehouse first flows through the first rear heat exchange core 13-2 for cooling and dehumidification, and then flows through the first front The heat exchange core 13-1 is heated to achieve thermal compensation temperature rise, so that the first indoor air-cooled evaporation-condensation integrated heat exchanger 13 is used as a condenser and evaporator at the same time to achieve constant temperature dehumidification; at the same time, the other path passes through the third solenoid valve 15 to enter the second front heat exchange core 11-1 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, and then the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the second electronic expansion valve 9 to expand into a low-temperature and low-pressure refrigerant liquid, and the low-temperature and low-pressure refrigerant liquid passes through the fourth solenoid valve 1 7 and then enters the second rear heat exchange core 11-2 to evaporate into low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then enters the gas-liquid separator 16 through the four-way reversing valve 3 and then enters the compressor 1, forming another circuit. The air in the second transport compartment first flows through the second rear heat exchange core 11-2 for cooling and dehumidification, and then flows through the second front heat exchange core 11-1 for heating to achieve thermal compensation and temperature increase. In this way, the second indoor air-cooled evaporation and condensation integrated heat exchanger 11 is used as a condenser and evaporator at the same time to achieve constant temperature dehumidification.During this process, the two return air temperature sensors 19 are used to respectively detect the temperatures in the first transport warehouse and the second transport warehouse in real time. When the temperatures in the first transport warehouse and the second transport warehouse rise beyond the set temperature range, the first solenoid valve 4 and the outdoor heat exchanger 5 are both opened, and the first electronic expansion valve 8 and the third electronic expansion valve 10 follow the outdoor heat exchanger 5 to open. Then, the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then is divided into one path through the first solenoid valve 4 to enter the outdoor heat exchanger 5 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid storage device 6 and the drying filter 7 in sequence, and then is divided into two paths respectively through The first electronic expansion valve 8 and the third electronic expansion valve 10 expand into a low-temperature, low-pressure refrigerant liquid. The low-temperature, low-pressure refrigerant liquid then enters the first rear heat exchange core 13-2 and the second rear heat exchange core 11-2, respectively, to evaporate into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas then enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1. In this way, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensation load to the outdoors. Otherwise, the first solenoid valve 4, the first electronic expansion valve 8, and the third electronic expansion valve 10 are closed, and the outdoor heat exchanger 5 is on standby, thereby ensuring that the temperature in the first transport warehouse and the second transport warehouse is constant within the set temperature range. This dual constant temperature dehumidification mode can meet the needs of simultaneous constant temperature dehumidification in the first transport warehouse and the second transport warehouse.

[0038] (VII) Single constant temperature dehumidification mode, divided into two situations: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used as both a condenser and an evaporator, so that the air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, so that the first indoor air-cooled evaporative condensing integrated heat exchanger 13 dehumidifies at a constant temperature alone; the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is on standby; during this process, if the temperature in the first transport compartment rises beyond the set temperature range, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensing load to the outdoors; otherwise, it is on standby, thereby ensuring that the temperature in the first transport compartment is constant within the set temperature range; The first case of single constant temperature dehumidification mode is as follows: Figure 11As shown, the second solenoid valve 14, the fourth electronic expansion valve 12 and the fifth solenoid valve 18 are all open, the third solenoid valve 15, the second electronic expansion valve 9, the fourth solenoid valve 17 and the third electronic expansion valve 10 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then passes through the second solenoid valve 14 into the first front heat exchange core 13-1 to be condensed into high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, and then the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the fourth electronic expansion valve 12 to be expanded into low The low-temperature and low-pressure refrigerant liquid passes through the fifth solenoid valve 18 and enters the first rear heat exchange core 13-2 to evaporate into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16, and then enters the compressor 1 to form a loop. The air in the first transport warehouse first flows through the first rear heat exchange core 13-2 for cooling and dehumidification, and then flows through the first front heat exchange core 13-1 for heating to achieve thermal compensation and temperature rise. In this way, the first indoor air-cooled evaporation and condensation integrated heat exchanger 13 is used as a condenser and evaporator at the same time to achieve independent constant temperature dehumidification, and the second indoor air-cooled evaporation and condensation is used as a condenser and evaporator at the same time to achieve independent constant temperature dehumidification. The integrated heat exchanger 11 is on standby; during this process, the return air temperature sensor 19 on the return air side of the first indoor air-cooled evaporative condensing integrated heat exchanger 13 detects the temperature in the first transport bin in real time. When the temperature in the first transport bin rises beyond the set temperature range, the first solenoid valve 4 and the outdoor heat exchanger 5 are both opened, and the first electronic expansion valve 8 follows the outdoor heat exchanger 5 to open. Then, the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then is divided into one path through the first solenoid valve 4 to enter the outdoor heat exchanger 5 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid storage tank 6 and the dryer in turn. Dry filter 7, then, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the first electronic expansion valve 8, and the low-temperature and low-pressure refrigerant liquid enters the first rear heat exchange core 13-2 to evaporate into a low-temperature and low-pressure refrigerant gas, and the low-temperature and low-pressure refrigerant gas enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1. In this way, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensation load to the outdoors, otherwise the first solenoid valve 4 and the first electronic expansion valve 8 are closed, and the outdoor heat exchanger 5 is on standby, thereby ensuring that the temperature in the first transport warehouse is constant within the set temperature range.

[0039] In the second scenario, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used as both a condenser and an evaporator, so that the air in the second transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, so that the second indoor air-cooled evaporative condensing integrated heat exchanger 11 dehumidifies at a constant temperature alone; the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is on standby; during this process, if the temperature in the second transport compartment rises beyond the set temperature range, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensing load to the outdoors; otherwise, it is on standby, thereby ensuring that the temperature in the second transport compartment is constant within the set temperature range; The second case of single constant temperature dehumidification mode is as follows: Figure 12As shown, the third solenoid valve 15, the second electronic expansion valve 9 and the fourth solenoid valve 17 are all open, the second solenoid valve 14, the fourth electronic expansion valve 12, the fifth solenoid valve 18 and the first electronic expansion valve 8 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and then passes through the third solenoid valve 15 into the second front heat exchange core 11-1 and is condensed into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. Afterwards, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the second electronic expansion valve 9 and is expanded into a low-temperature and low-pressure refrigerant liquid. The refrigerant liquid with high pressure and low temperature enters the second rear heat exchange core 11-2 after passing through the fourth solenoid valve 17 to evaporate into a refrigerant gas with low temperature and low pressure. The refrigerant gas with low temperature and low pressure enters the gas-liquid separator 16 through the four-way reversing valve 3 and then enters the compressor 1 to form a loop. The air in the second transport warehouse first flows through the second rear heat exchange core 11-2 for cooling and dehumidification and then flows through the second front heat exchange core 11-1 for heating to achieve thermal compensation and temperature rise. In this way, the second indoor air-cooled evaporation-condensation integrated heat exchanger 11 is used as a condenser and evaporator at the same time to achieve independent constant temperature dehumidification. The first indoor air-cooled evaporation-condensation integrated heat exchanger 11 is used as a condenser and an evaporator at the same time to achieve independent constant temperature dehumidification. The heat exchanger 13 is on standby; during this process, the return air temperature sensor 19 on the return air side of the second indoor air-cooled evaporative condensing integrated heat exchanger 11 detects the temperature in the second transport warehouse in real time. When the temperature in the second transport warehouse rises beyond the set temperature range, the first solenoid valve 4 and the outdoor heat exchanger 5 are both opened, and the third electronic expansion valve 10 follows the outdoor heat exchanger 5 to open. Then, the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then is divided into one path through the first solenoid valve 4 to enter the outdoor heat exchanger 5 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid storage 6 and the drying process in turn. Filter 7, then the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the third electronic expansion valve 10, and the low-temperature and low-pressure refrigerant liquid enters the second rear heat exchange core 11-2 to evaporate into a low-temperature and low-pressure refrigerant gas, and the low-temperature and low-pressure refrigerant gas enters the gas-liquid separator 16 through the four-way reversing valve 3, and then enters the compressor 1. In this way, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensation load to the outdoors, otherwise the first solenoid valve 4 and the third electronic expansion valve 10 are closed, and the outdoor heat exchanger 5 is on standby, thereby ensuring that the temperature in the second transport warehouse is constant within the set temperature range.

[0040] (8) Single cooling and constant temperature dehumidification mode, divided into two cases: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase. The first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used alone for constant temperature dehumidification. The second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used only as an evaporator for cooling. The outdoor heat exchanger 5 is used as a condenser. The first case of single cooling and single constant temperature dehumidification mode is as follows: Figure 13 As shown, the second solenoid valve 14, the fourth electronic expansion valve 12, the fifth solenoid valve 18, the first solenoid valve 4 and the third electronic expansion valve 10 are all open, the third solenoid valve 15, the second electronic expansion valve 9, the fourth solenoid valve 17 and the first electronic expansion valve 8 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and is divided into two paths: one path passes through the second solenoid valve 14 and enters the first front heat exchange core 13 -1 is condensed into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. After that, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid is expanded into a low-temperature and low-pressure refrigerant liquid through the fourth electronic expansion valve 12. The low-temperature and low-pressure refrigerant liquid then passes through the fifth solenoid valve 18 and enters the first rear heat exchange core 13-2 to evaporate into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16, and then enters the compressor 1, forming a circuit. The air in the first transport compartment first flows through the first rear heat exchange core 13-2. After cooling and dehumidifying, the core 13-2 flows through the first front heat exchange core 13-1 for heating to achieve thermal compensation and temperature rise. In this way, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used as a condenser and evaporator at the same time to achieve independent constant temperature dehumidification. At the same time, the other path passes through the first solenoid valve 4 and enters the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as a condenser to condense the high-temperature and high-pressure refrigerant gas into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid reservoir 6 and the drying filter 7 in sequence. After that, it is expanded into a low-temperature and low-pressure refrigerant liquid through the third electronic expansion valve 10. The low-temperature and low-pressure refrigerant liquid enters the second rear heat exchange core 11-2 and evaporates into a low-temperature and low-pressure refrigerant gas. The air flowing through the second rear heat exchange core 11-2 in the second transport warehouse is cooled. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and the gas-liquid separator 16 and enters the compressor 1 to form another circuit. In this way, the second indoor air-cooled evaporation-condensing integrated heat exchanger 11 only serves as an evaporator to achieve independent cooling.

[0041] In the second scenario, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used as both a condenser and an evaporator. The air in the second transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase. The second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used alone for constant temperature dehumidification. The first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used only as an evaporator for cooling. The outdoor heat exchanger 5 is used as a condenser. The second case of single cooling and constant temperature dehumidification mode is as follows: Figure 14 As shown, the first solenoid valve 4, the third electronic expansion valve 10, the third solenoid valve 15, the second electronic expansion valve 9 and the fifth solenoid valve 18 are all open, the first electronic expansion valve 8, the second solenoid valve 14, the fourth electronic expansion valve 12 and the fourth solenoid valve 17 are all closed, and the four-way reversing valve 3 is in the positive cycle position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and is divided into two paths: one path passes through the first solenoid valve 4 and enters the outdoor heat exchanger 5, and the outdoor The heat exchanger 5 acts as a condenser to condense the high-temperature and high-pressure refrigerant gas into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid storage tank 6 and the drying filter 7 in sequence. After that, it is expanded into a low-temperature and low-pressure refrigerant liquid through the third electronic expansion valve 10. The low-temperature and low-pressure refrigerant liquid enters the second rear heat exchange core 11-2 and evaporates into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and the gas-liquid separator 16 before entering the compressor 1. , forming a circuit; at the same time, the other path passes through the third solenoid valve 15 and enters the second front heat exchange core 11-1 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. After that, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the second electronic expansion valve 9 to expand into a low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid then passes through the fifth solenoid valve 18 and enters the first rear heat exchange core 13-2 to evaporate into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16. Then it enters the compressor 1 to form another loop; the air in the second transport compartment first flows through the second rear heat exchange core 11-2 for cooling and dehumidification, and then flows through the second front heat exchange core 11-1 for heating to achieve thermal compensation and temperature increase. At the same time, the air in the first transport compartment flowing through the first rear heat exchange core 13-2 is cooled; in this way, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used as a condenser and evaporator at the same time to achieve independent constant temperature dehumidification; the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used only as an evaporator to achieve independent cooling.

[0042] (IX) Single heating and constant temperature dehumidification mode, divided into two situations: In the first case, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used as both a condenser and an evaporator, so that the air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, so that the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used alone for constant temperature dehumidification; the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used only as a condenser and heats the room alone; during this process, when the temperature in the first transport compartment rises beyond the set temperature range, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensing load to the outdoors, otherwise it is on standby, thereby ensuring that the temperature in the first transport compartment is constant within the set temperature range; The first case of single heating and single constant temperature dehumidification mode is as follows: Figure 15As shown, the second solenoid valve 14, the fourth electronic expansion valve 12, the fifth solenoid valve 18, the third solenoid valve 15 and the second electronic expansion valve 9 are all open, the fourth solenoid valve 17 and the third electronic expansion valve 10 are all closed, and the four-way reversing valve 3 is in the positive cycle position. The compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2. Afterwards, the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and is divided into two paths: one path passes through the second solenoid valve 14 and enters the first front heat exchange core 13-1 to condense into high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. Afterwards, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the fourth electronic expansion valve 12 to expand into low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid then passes through the fifth solenoid valve 18 and enters the first rear heat exchange core 13-2 to evaporate into low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 to enter the gas-liquid separator 16 and then enters the compressor 1, forming a circuit. The air in the first transport compartment first flows through the second solenoid valve 14 and enters the first front heat exchange core 13-1 to condense into high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. After cooling and dehumidifying, the first rear heat exchange core 13-2 flows through the first front heat exchange core 13-1 for heating and thermal compensation temperature increase. In this way, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used as both a condenser and an evaporator to achieve independent constant temperature dehumidification. At the same time, the other path passes through the third solenoid valve 15 and enters the second front heat exchange core 11-1 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. Afterwards, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the second electronic expansion valve 9 to expand into a low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid then passes through the fifth solenoid valve 18 and enters the first rear heat exchange core 13-2 to evaporate into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16, and then enters the compressor 1 to form another circuit. The air in the second transport compartment flowing through the second front heat exchange core 11-1 is heated. In this way, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 only serves as a condenser to achieve independent heating.During this process, the return air temperature sensor 19 on the return air side of the first indoor air-cooled evaporative condensing integrated heat exchanger 13 detects the temperature in the first transport bin in real time. When the temperature in the first transport bin rises beyond the set temperature range, the first solenoid valve 4 and the outdoor heat exchanger 5 are both opened, and the first electronic expansion valve 8 follows the outdoor heat exchanger 5 to open. Then, the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then is divided into one path through the first solenoid valve 4 to enter the outdoor heat exchanger 5 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid reservoir 6 and the drying filter 7 in sequence. Afterwards, the high-temperature, high-pressure or medium-temperature, high-pressure refrigerant liquid expands into low-temperature, low-pressure refrigerant liquid through the first electronic expansion valve 8. The low-temperature, low-pressure refrigerant liquid then enters the first rear heat exchange core 13-2, where it evaporates into low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16 before entering the compressor 1. In this manner, the outdoor heat exchanger 5 functions as a condenser, discharging part of the condensing load outdoors. Otherwise, the first solenoid valve 4 and the first electronic expansion valve 8 are closed, and the outdoor heat exchanger 5 is in standby mode, thereby ensuring that the temperature in the first transport compartment remains constant within the set temperature range.

[0043] The second scenario: the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used as both a condenser and an evaporator, so that the air in the second transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, so that the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used alone for constant temperature dehumidification; the first indoor air-cooled evaporative condensing integrated heat exchanger 13 is used only as a condenser and heats the room alone; during this process, when the temperature in the second transport compartment rises beyond the set temperature range, the outdoor heat exchanger 5 is used as a condenser to discharge part of the condensing load to the outdoors, otherwise it is on standby, thereby ensuring that the temperature in the second transport compartment is constant within the set temperature range; The second case of single heating and single constant temperature dehumidification mode is as follows: Figure 16As shown, the second solenoid valve 14, the fourth electronic expansion valve 12, the third solenoid valve 15, the second electronic expansion valve 9 and the fourth solenoid valve 17 are all open, the fifth solenoid valve 18 and the first electronic expansion valve 8 are all closed, and the four-way reversing valve 3 is in the positive circulation position, then the compressor 1 discharges high-temperature and high-pressure refrigerant gas into the oil separator 2, and then the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3 and is divided into two paths: one path passes through the third solenoid valve 15 and enters the second front heat exchange core 11-1 to condense into high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid, and then the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the second electronic expansion valve 9 to expand into low-temperature and low-pressure refrigerant liquid, and the low-temperature and low-pressure refrigerant liquid passes through the fourth solenoid valve 17 and enters the second rear heat exchange core 11-2 to evaporate into low-temperature and low-pressure refrigerant gas, and the low-temperature and low-pressure refrigerant gas passes through the four-way reversing valve 3 to enter the gas-liquid separator 16, and then enters the compressor 1, forming a circuit, and the air in the second transport warehouse first flows through the second After cooling and dehumidifying, the rear heat exchange core 11-2 flows through the second front heat exchange core 11-1 for heating and thermal compensation temperature increase. In this way, the second indoor air-cooled evaporative condensing integrated heat exchanger 11 is used as both a condenser and an evaporator to achieve independent constant temperature dehumidification. At the same time, the other path passes through the second solenoid valve 14 and enters the first front heat exchange core 13-1 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. After that, the high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid passes through the fourth electronic expansion valve 12 to expand into a low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid then passes through the fourth solenoid valve 17 and enters the second rear heat exchange core 11-2 to evaporate into a low-temperature and low-pressure refrigerant gas. The low-temperature and low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16, and then enters the compressor 1 to form another circuit. The air in the first transport compartment that flows through the first front heat exchange core 13-1 is heated. In this way, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 only serves as a condenser to achieve independent heating.During this process, the return air temperature sensor 19 on the return air side of the second indoor air-cooled evaporative condensing integrated heat exchanger 11 detects the temperature in the second transport compartment in real time. When the temperature in the second transport compartment rises beyond the set temperature range, the first solenoid valve 4 and the outdoor heat exchanger 5 are both opened, and the third electronic expansion valve 10 follows the outdoor heat exchanger 5 to open. Then, the high-temperature and high-pressure refrigerant gas passes through the four-way reversing valve 3, and then is divided into one path through the first solenoid valve 4 to enter the outdoor heat exchanger 5 to condense into a high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid. The high-temperature and high-pressure or medium-temperature and high-pressure refrigerant liquid then flows through the liquid reservoir 6 and the drying filter 7 in sequence. The high-temperature, high-pressure or medium-temperature, high-pressure refrigerant liquid then expands through the third electronic expansion valve 10 into a low-temperature, low-pressure refrigerant liquid. The low-temperature, low-pressure refrigerant liquid then enters the second rear heat exchange core 11-2, where it evaporates into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas then passes through the four-way reversing valve 3 and enters the gas-liquid separator 16 before entering the compressor 1. In this manner, the outdoor heat exchanger 5 functions as a condenser, discharging part of the condensing load outdoors. Otherwise, the first solenoid valve 4 and the third electronic expansion valve 10 are closed, and the outdoor heat exchanger 5 is in standby mode, thereby ensuring that the temperature in the second transport compartment remains constant within the set temperature range.

[0044] In summary, the first indoor air-cooled evaporative condensing integrated heat exchanger 13 and the second indoor air-cooled evaporative condensing integrated heat exchanger 11 can be independently and freely combined to operate according to the needs of the first transport warehouse and the second transport warehouse, and up to 15 working modes can be obtained, while meeting the different temperature and humidity requirements of the first transport warehouse and the second transport warehouse.

[0045] This dual-temperature heating and cooling system for transportation does not require hot gas bypass or electric heating when heating, avoiding the liquid compression problem of compressor 1 caused by hot gas bypass, ensuring the service life of compressor 1, and avoiding the high energy consumption problem caused by electric heating.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A dual-temperature cooling and heating system for transportation, characterized by: It includes a compressor, an oil separator, a four-way reversing valve, a gas-liquid separator, a first solenoid valve, an outdoor heat exchanger, a liquid reservoir, a drying filter, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a first indoor air-cooled evaporative condensing integrated heat exchanger, a fourth electronic expansion valve, a second indoor air-cooled evaporative condensing integrated heat exchanger, a second solenoid valve, a third solenoid valve, a fourth solenoid valve and a fifth solenoid valve; The first indoor air-cooled evaporative condensing integrated heat exchanger is arranged in the first transport warehouse, and the first indoor air-cooled evaporative condensing integrated heat exchanger can be used only as an evaporator, a condenser, or as an evaporator and a condenser at the same time to achieve cooling, heating or constant temperature dehumidification; the first indoor air-cooled evaporative condensing integrated heat exchanger includes a first front heat exchange core and a first rear heat exchange core arranged in parallel front and back, the supply air side of the first indoor air-cooled evaporative condensing integrated heat exchanger is located at the front side of the first front heat exchange core, and the return air side of the first indoor air-cooled evaporative condensing integrated heat exchanger is located at the rear side of the first rear heat exchange core, and the compressor, oil separator, four-way reversing valve, second solenoid valve, first front heat exchange core, fourth electronic expansion valve, fifth solenoid valve, first rear heat exchange core and gas-liquid separator are connected by pipelines to form a first circulation loop; The second indoor air-cooled evaporative condensing integrated heat exchanger is arranged in the second transport warehouse, and the second indoor air-cooled evaporative condensing integrated heat exchanger can be used only as an evaporator, a condenser, or as an evaporator and a condenser at the same time to achieve cooling, heating or constant temperature dehumidification; the second indoor air-cooled evaporative condensing integrated heat exchanger includes a second front heat exchange core and a second rear heat exchange core arranged in parallel, the supply air side of the second indoor air-cooled evaporative condensing integrated heat exchanger is located at the front side of the second front heat exchange core, and the return air side of the second indoor air-cooled evaporative condensing integrated heat exchanger is located at the rear side of the second rear heat exchange core, and the compressor, oil separator, four-way reversing valve, third solenoid valve, second front heat exchange core, second electronic expansion valve, fourth solenoid valve, second rear heat exchange core and gas-liquid separator are connected through pipelines to form a second circulation loop; The pipeline between the fourth electronic expansion valve and the fifth solenoid valve is connected to the pipeline between the second electronic expansion valve and the fourth solenoid valve through a first branch; The first solenoid valve, the outdoor heat exchanger, the liquid reservoir, the filter drier, and the first electronic expansion valve are connected by a pipeline to form a second branch, one end of the second branch is connected to the first branch, and the other end of the second branch is connected to the pipeline between the four-way reversing valve and the third solenoid valve or between the four-way reversing valve and the second solenoid valve; The pipeline between the fourth solenoid valve and the second rear heat exchanger is connected to the pipeline between the drying filter and the first electronic expansion valve through a third branch, and the third electronic expansion valve is arranged on the third branch; The return air sides of the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both provided with return air temperature sensors, and the two return air temperature sensors respectively correspond to real-time detection of the temperature in the first transport warehouse and the second transport warehouse, so that when constant temperature dehumidification is performed in the first transport warehouse and / or the second transport warehouse, the first solenoid valve and the outdoor heat exchanger are opened according to the temperature in the first transport warehouse and / or the second transport warehouse, so that the outdoor heat exchanger is used as a condenser.

2. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: Including dual cooling mode: the outdoor heat exchanger is used as a condenser, while the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both used only as evaporators and cool at the same time.

3. The operating method of the dual-temperature heating and cooling system for transportation according to claim 1, characterized in that: Including single cooling mode, there are two cases: The first scenario: The outdoor heat exchanger is used as a condenser, while the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for independent cooling, and the second indoor air-cooled evaporative condensing integrated heat exchanger is on standby. The second situation: the outdoor heat exchanger is used as a condenser, and the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for independent cooling, and the first indoor air-cooled evaporative condensing integrated heat exchanger is on standby.

4. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: It includes a dual heating mode: the outdoor heat exchanger is used as an evaporator, while the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both used only as condensers, generating heat at the same time.

5. The operating method of the dual-temperature heating and cooling system for transportation according to claim 1, characterized in that: Including heating mode only, there are two situations: The first scenario: The outdoor heat exchanger is used as an evaporator, while the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating, and the second indoor air-cooled evaporative condensing integrated heat exchanger is on standby. The second situation: the outdoor heat exchanger is used as an evaporator, and the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating alone, and the first indoor air-cooled evaporative condensing integrated heat exchanger is on standby.

6. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: Including single cooling and single heating mode, divided into two cases: The first scenario: The outdoor heat exchanger is on standby, and the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating. At the same time, the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for cooling. The second situation: the outdoor heat exchanger is on standby, and the second indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser for heating alone; at the same time, the first indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator for cooling alone.

7. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: It includes a dual constant temperature dehumidification mode: the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger are both used as condensers and evaporators at the same time, so that the air in the first transport warehouse and the second transport warehouse is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the first indoor air-cooled evaporative condensing integrated heat exchanger and the second indoor air-cooled evaporative condensing integrated heat exchanger can simultaneously perform constant temperature dehumidification; in this process, when the temperature in the first transport warehouse and the second transport warehouse rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensation load to the outdoors, otherwise it is on standby, thereby ensuring that the temperature in the first transport warehouse and the second transport warehouse is constant within the set temperature range.

8. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: Including single constant temperature dehumidification mode, divided into two situations: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, allowing the first indoor air-cooled evaporative condensing integrated heat exchanger to independently maintain a constant temperature and dehumidify. The second indoor air-cooled evaporative condensing integrated heat exchanger is on standby. During this process, if the temperature in the first transport compartment rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensing load to the outdoors. Otherwise, it is on standby, thereby ensuring that the temperature in the first transport compartment is constant within the set temperature range. The second situation: the second indoor air-cooled evaporative condensing integrated heat exchanger is used as a condenser and evaporator at the same time, so that the air in the second transport warehouse is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the second indoor air-cooled evaporative condensing integrated heat exchanger can dehumidify at a constant temperature alone; the first indoor air-cooled evaporative condensing integrated heat exchanger is on standby; during this process, when the temperature in the second transport warehouse rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensation load to the outdoors, otherwise it is on standby, thereby ensuring that the temperature in the second transport warehouse is constant within the set temperature range.

9. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: Including single cooling and single constant temperature dehumidification mode, divided into two situations: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase. This allows the first indoor air-cooled evaporative condensing integrated heat exchanger to independently maintain a constant temperature and dehumidify. The second indoor air-cooled evaporative condensing integrated heat exchanger is used only as an evaporator and provides cooling. The outdoor heat exchanger is used as a condenser. The second situation: the second indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator, so that the air in the second transport warehouse is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the second indoor air-cooled evaporative condensing integrated heat exchanger can perform constant temperature dehumidification alone; the first indoor air-cooled evaporative condensing integrated heat exchanger is only used as an evaporator and is cooled alone; the outdoor heat exchanger is used as a condenser.

10. The operating method of the dual-temperature cooling and heating system for transportation according to claim 1, characterized in that: Including single heating and single constant temperature dehumidification mode, divided into two situations: In the first scenario, the first indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator. The air in the first transport compartment is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve thermal compensation and temperature increase, allowing the first indoor air-cooled evaporative condensing integrated heat exchanger to independently maintain a constant temperature and dehumidify. The second indoor air-cooled evaporative condensing integrated heat exchanger is used only as a condenser and independently provides heating. During this process, if the temperature in the first transport compartment rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensing load to the outdoors. Otherwise, it is on standby, thereby ensuring that the temperature in the first transport compartment is constant within the set temperature range. The second situation: the second indoor air-cooled evaporative condensing integrated heat exchanger is used as both a condenser and an evaporator, so that the air in the second transport warehouse is first cooled and dehumidified by the evaporator and then heated by the condenser to achieve heat compensation and temperature increase, so that the second indoor air-cooled evaporative condensing integrated heat exchanger can dehumidify at a constant temperature alone; the first indoor air-cooled evaporative condensing integrated heat exchanger is only used as a condenser and generates heat alone; during this process, when the temperature in the second transport warehouse rises beyond the set temperature range, the outdoor heat exchanger is used as a condenser to discharge part of the condensation load to the outdoors, otherwise it will be on standby, thereby ensuring that the temperature in the second transport warehouse is constant within the set temperature range.

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