Refrigerating system and airplane with same

Abstract

The utility model provides a refrigerating system and an airplane with the refrigerating system, the refrigerating system comprises a first cold carrying circulation loop; the first refrigerating circulation loop comprises a first evaporator, a first refrigerating medium loop, a first cooling unit and a second cooling unit, the first refrigerating medium loop is provided with a first heat exchange pipe section, and the first cooling unit and the second cooling unit are arranged in parallel; the first cooling unit comprises a first heat exchanger, an inlet of the first heat exchanger is connected with an outlet of the first heat exchange pipe section, and the first heat exchanger is used for cooling the first cooling area; the second cooling unit comprises a first heat regenerator, the first heat regenerator is used for cooling the second cooling area, and the temperature of the first cooling area is smaller than that of the second cooling area. The first heat exchanger, the first heat regenerator and the first evaporator are connected in series, the first cooling unit and the second cooling unit are connected in parallel, and independent control over the temperature and the cooling capacity of secondary refrigerants of all loops can be achieved for areas with different temperatures.

Description

Technical Field

[0001] The utility model belongs to the technical field of air refrigeration, and particularly relates to a refrigeration system and an aircraft with the refrigeration system. Background Art

[0002] During the operation of an aircraft, a large amount of heat will be released. To ensure its normal operation, an auxiliary cooling system is required to cool the end heat loads such as kitchen food trucks and large electronic devices. However, since these devices are scattered and far apart, if multiple circuits are used to provide cooling capacity, due to the different cooling capacity and temperature requirements of each circuit, it is difficult to meet the requirements of each circuit simultaneously with a single evaporator. In addition, there is a large difference in temperature requirements between the kitchen food truck and the large electronic device. The ambient temperature around the kitchen food truck needs to be maintained at 0 - 4°C, while the large electronic device needs to be higher than the dew point temperature to avoid condensation water affecting the normal operation of the electronic device. When these devices operate simultaneously, the heat load is large, and the refrigeration temperature requirements of the kitchen food trucks and the electronic devices are different. Conventional indirect refrigeration systems only use one heat exchanger and it is difficult to meet the cooling capacity requirements. Summary of the Utility Model

[0003] The utility model provides a refrigeration system and an aircraft with the refrigeration system, which can solve the technical problem in the prior art that only one heat exchanger is used to adjust the refrigeration temperature requirements of different refrigeration areas and the cooling capacity cannot meet the requirements.

[0004] The utility model provides a refrigeration system, which includes a first secondary refrigerant circulation loop;

[0005] The first secondary refrigerant circulation loop includes a first evaporator, a first secondary refrigerant loop, a first cooling unit, and a second cooling unit. The first secondary refrigerant loop has a first heat exchange pipe section, and the inlet and outlet of the first heat exchange pipe section are respectively connected to the inlet and outlet of the first evaporator. The first cooling unit and the second cooling unit are arranged in parallel;

[0006] The first cooling unit includes a first heat exchanger. The inlet of the first heat exchanger is connected to the outlet of the first heat exchange pipe section, and the outlet of the first heat exchanger is connected to the inlet of the first secondary refrigerant loop. The first heat exchanger is used to cool down the first cooling area;

[0007] The second cooling unit includes a first regenerator. The inlet of the first regenerator is connected to the outlet of the first heat exchange pipe section, and the outlet of the first regenerator is connected to the inlet of the first secondary refrigerant loop. The first regenerator is used to cool down the second cooling area, and the temperature of the first cooling area is lower than that of the second cooling area.

[0008] In some embodiments, the refrigeration system further includes a second evaporator. The first evaporator is connected in series with the second evaporator. The first secondary refrigerant circuit has a second heat exchange pipe section. The inlet and outlet of the second heat exchange pipe section are respectively connected to the inlet and outlet of the second evaporator. The inlet of the first heat exchange pipe section is connected to the outlet of the first secondary refrigerant circuit, and the outlet of the first heat exchange pipe section is connected to the inlet of the second heat exchange pipe section;

[0009] The inlet of the first heat exchanger is connected to the outlet of the second heat exchange pipe section, and the inlet of the first regenerator is connected to the outlet of the second heat exchange pipe section.

[0010] In some embodiments, the first secondary refrigerant circulation circuit further includes a liquid distribution unit. The liquid distribution unit is arranged between the inlet and outlet of the first secondary refrigerant circuit, and is arranged between the inlet of the first heat exchange pipe section and the outlet of the first secondary refrigerant circuit. The inlet of the first secondary refrigerant pump is connected to the outlet of the first secondary refrigerant circuit through a first pipeline. The outlet of the first secondary refrigerant pump is connected to the inlet of the filter, and the outlet of the filter is connected to the inlet of the first heat exchange pipe section; The interface of the expansion tank is connected to the first pipeline.

[0011] In some embodiments, the liquid distribution unit further includes a second secondary refrigerant pump and a bypass valve. The second secondary refrigerant pump and the first secondary refrigerant pump are arranged in parallel. The inlet of the second secondary refrigerant pump is connected to the outlet of the first secondary refrigerant circuit through a first pipeline, and the outlet of the second secondary refrigerant pump is connected to the inlet of the filter;

[0012] A first check valve is arranged between the outlet of the first secondary refrigerant pump and the inlet of the filter, and a second check valve is arranged between the outlet of the second secondary refrigerant pump and the inlet of the filter;

[0013] The bypass valve is arranged in parallel with the filter. The inlet of the bypass valve is connected to the outlet of the first secondary refrigerant pump and / or the outlet of the second secondary refrigerant pump, and the outlet of the bypass valve is connected to the inlet of the first heat exchange pipe section.

[0014] In some embodiments, a first liquid temperature sensor and a first pressure sensor are arranged on the first pipeline. The interface of the expansion tank is arranged between the first liquid temperature sensor and the first pressure sensor; A second pressure sensor is arranged between the outlet of the first secondary refrigerant pump and the inlet of the filter or between the outlet of the second secondary refrigerant pump and the inlet of the filter, and a third pressure sensor is arranged between the outlet of the filter and the inlet of the first heat exchange pipe section or between the outlet of the bypass valve and the inlet of the first heat exchange pipe section.

[0015] In some embodiments, the first cooling unit further includes a blower and a heating film. The blower is arranged on the air outlet path of the first heat exchanger, and the air outlet of the blower faces the first cooling area; the heating film is arranged beside the first heat exchanger.

[0016] In some embodiments, the first cooling unit further includes a return air temperature sensor, an outlet air temperature sensor, a first inlet liquid temperature sensor, and a first outlet liquid temperature sensor;

[0017] The first inlet liquid temperature sensor is arranged between the inlet of the first heat exchanger and the outlet of the first heat exchange pipe section; the first outlet liquid temperature sensor is arranged between the outlet of the first heat exchanger and the inlet of the first coolant circuit;

[0018] The return air temperature sensor is arranged on the air inlet side of the first heat exchanger, and the outlet air temperature sensor is arranged at the air outlet of the blower.

[0019] In some embodiments, the second cooling unit further includes a first liquid cooling plate and a second liquid cooling plate. The first recuperator includes a first heat exchange side and a second heat exchange side. The inlet of the first heat exchange side is connected to the outlet of the first heat exchange pipe section, and the outlet of the second heat exchange side is connected to the inlet of the first coolant circuit;

[0020] The first heat exchange side is provided with a first branch and a second branch. The inlet of the first branch is connected to the outlet of the first heat exchange side, the outlet of the first branch is connected to the inlet of the first liquid cooling plate, the inlet of the second branch is connected to the outlet of the first heat exchange side, and the outlet of the second branch is connected to the inlet of the second liquid cooling plate;

[0021] The second heat exchange side is provided with a third branch and a fourth branch. The inlet of the third branch is connected to the outlet of the first liquid cooling plate, the outlet of the third branch is connected to the inlet of the second heat exchange side, and the first liquid cooling plate is arranged on a first device; the inlet of the fourth branch is connected to the outlet of the second liquid cooling plate, the outlet of the fourth branch is connected to the inlet of the second heat exchange side, and the second liquid cooling plate is arranged on a second device.

[0022] In some embodiments, the second cooling unit further includes a three-way valve, a first flow regulating valve, a second flow regulating valve, a second inlet liquid temperature sensor, a second outlet sensor, and a third outlet sensor;

[0023] The three-way valve is arranged between the inlet of the first heat exchange side and the outlet of the first heat exchange pipe section. The first valve port of the three-way valve is connected to the outlet of the first heat exchange pipe section, the second valve port of the three-way valve is connected to the inlet of the first heat exchange side, and the third valve port of the three-way valve is connected to the outlet of the first heat exchange side;

[0024] The first flow regulating valve is arranged between the outlet of the first heat exchange side and the inlet of the first branch, and the second flow regulating valve is arranged between the outlet of the first heat exchange side and the inlet of the second branch; A second inlet liquid temperature sensor is arranged between the inlet of the first branch and the outlet of the first heat exchange side or between the inlet of the second branch and the outlet of the first heat exchange side; A second outlet liquid sensor is arranged between the outlet of the third branch and the inlet of the second heat exchange side, and a third outlet liquid sensor is arranged between the outlet of the fourth branch and the inlet of the second heat exchange side.

[0025] In some embodiments, the first secondary coolant circulation loop further includes a third cooling unit. The first cooling unit, the second cooling unit and the third cooling unit are arranged in parallel. The second cooling unit includes a second regenerator. The inlet of the second regenerator is connected to the outlet of the first heat exchange pipe section, and the outlet of the second regenerator is connected to the inlet of the first secondary coolant loop. The second regenerator is used to cool down the third cooling area.

[0026] In some embodiments, the refrigeration system further includes a second secondary coolant circulation loop. The second secondary coolant circulation loop includes a third evaporator, a second secondary coolant loop, a fourth cooling unit and a fifth cooling unit. The third evaporator has a third heat exchange pipe section. The inlet and outlet of the third heat exchange pipe section are respectively connected to the inlet and outlet of the third evaporator. The fourth cooling unit and the fifth cooling unit are arranged in parallel;

[0027] The fourth cooling unit includes a second heat exchanger. The inlet of the second heat exchanger is connected to the outlet of the third heat exchange pipe section, and the outlet of the second heat exchanger is connected to the inlet of the second secondary coolant loop. The second heat exchanger is used to cool down the fourth cooling area;

[0028] The fifth cooling unit includes a third regenerator. The inlet of the third regenerator is connected to the outlet of the third heat exchange pipe section, and the outlet of the third regenerator is connected to the inlet of the second secondary coolant loop. The third regenerator is used to cool down the fifth cooling area.

[0029] In some embodiments, the first evaporator and the third evaporator are arranged in parallel. The first evaporator and the third evaporator are connected to a refrigeration distribution system. The refrigeration distribution system is used to respectively supply refrigerant to the first evaporator and the third evaporator.

[0030] In some embodiments, the inlet of the first heat exchanger is connected to the outlet of the first heat exchange tube section through a self-sealing joint, and the outlet of the first heat exchanger is connected to the inlet of the first secondary refrigerant circuit through a self-sealing joint; the inlet of the first regenerator is connected to the outlet of the first heat exchange tube section through a self-sealing joint, and the outlet of the first regenerator is connected to the inlet of the first secondary refrigerant circuit through a self-sealing joint.

[0031] An aircraft includes a refrigeration system, the refrigeration system being the above-mentioned refrigeration system, the first cooling area being the kitchen, and the second cooling area being the motor equipment installation area

[0032] A refrigeration system and an aircraft having the refrigeration system provided by the present utility model have the following beneficial effects:

[0033] In the present utility model, the first heat exchanger and the first regenerator are in series with the first evaporator, while the first cooling unit and the second cooling unit are in parallel. For different temperature regions, the heat load can be evenly distributed according to the equipment distribution region, and independent control of the temperature and cooling capacity of the secondary refrigerant in each circuit can be achieved to meet the different temperature and cooling requirements of the equipment in each circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0035] Figure 1 It is a schematic diagram of the refrigeration system according to the embodiment of the present utility model;

[0036] Figure 2 It is a schematic diagram of the first cooling unit according to the embodiment of the present utility model;

[0037] Figure 3 It is a schematic diagram of the second cooling unit according to the embodiment of the present utility model;

[0038] Figure 4 It is a schematic diagram of the liquid distribution unit according to the embodiment of the present utility model.

[0039] Accompanying drawings: 1 - First secondary refrigerant circulation loop; 2 - First evaporator; 3 - First cooling unit; 301 - First heat exchanger; 307 - Fan; 302 - Heating film; 303 - Return air temperature sensor; 304 - First outlet air temperature sensor; 305 - First inlet liquid temperature sensor; 306 - First outlet liquid temperature sensor; 4 - Second cooling unit; 401 - First regenerator; 402 - First branch; 403 - Second branch; 404 - Third branch; 405 - Fourth branch; 406 - Three-way valve; 407 - First flow regulating valve; 408 - Second flow regulating valve; 409 - Second inlet liquid temperature sensor; 410 - Second outlet liquid sensor; 411 - Third outlet liquid sensor; 5 - Second evaporator; 6 - Liquid distribution unit; 601 - Expansion tank; 602 - First secondary refrigerant pump; 603 - Filter; 604 - Second secondary refrigerant pump; 605 - Bypass valve; 606 - First check valve; 607 - Second check valve; 608 - First liquid temperature sensor; 609 - First pressure sensor; 610 - Second pressure sensor; 611 - Third pressure sensor; 7 - Third cooling unit; 8 - Second secondary refrigerant circulation loop; 9 - Third evaporator; 10 - Fourth cooling unit; 11 - Fifth cooling unit; 12 - Fourth evaporator. Detailed implementation mode

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0042] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations will be made for the spatial relative descriptions used herein.

[0043] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0044] Referring to Figure 1 As shown, according to an embodiment of the present utility model, a refrigeration system is provided, which includes a first secondary refrigerant circulation loop 1, a first secondary refrigerant circulation loop, including a first evaporator 2, a first secondary refrigerant loop, a first cooling unit 3 and a second cooling unit 4. The first secondary refrigerant loop has a first heat exchange pipe section, and the inlet and outlet of the first heat exchange pipe section are respectively connected to the inlet and outlet of the first evaporator 2. The first cooling unit 3 and the second cooling unit 4 are arranged in parallel; the first cooling unit 3 includes a first heat exchanger 301, the inlet of the first heat exchanger 301 is connected to the outlet of the first heat exchange pipe section, the outlet of the first heat exchanger 301 is connected to the inlet of the first secondary refrigerant loop, and the first heat exchanger 301 is used to cool down the first cooling zone; the second cooling unit 4 includes a first regenerator 401, the inlet of the first regenerator 401 is connected to the outlet of the first heat exchange pipe section, the outlet of the first regenerator 401 is connected to the inlet of the first secondary refrigerant loop, and the first regenerator 401 is used to cool down the second cooling zone, and the temperature of the first cooling zone is lower than that of the second cooling zone.

[0045] It is worth noting that the first evaporator 2 in this embodiment is provided with refrigerant by a separate refrigeration system. The refrigeration system includes components such as a compressor, a condenser, and an electronic expansion valve. Low-temperature refrigerant flows in the first evaporator 2, and the first evaporator 2 releases cold energy to the first heat exchange pipe section. In addition, the secondary refrigerant flows in the secondary refrigerant loop, the first cooling unit 3 and the second cooling unit 4.

[0046] Specifically, during the operation of the refrigeration system, the first evaporator 2 releases cold energy. Since the inlet and outlet of the first heat exchange tube section are respectively connected to the inlet and outlet of the first evaporator 2, the coolant flows into the first evaporator 2 from the inlet of the first heat exchange tube section. The coolant exchanges heat with the refrigerant in the first evaporator 2, and the coolant flowing out from the outlet of the first heat exchange tube section is low-temperature coolant. The low-temperature coolant flows to the first heat exchanger 301 and the first regenerator 401 respectively. The low-temperature coolant flows into the first heat exchanger 301, and the first heat exchanger 301 releases cold energy to the first cooling area, thereby reducing the temperature of the first cooling area. After the low-temperature coolant flows into the first regenerator 401, the first regenerator 401 heats up the low-temperature coolant, and the heated coolant releases cold energy to the second cooling area, thereby reducing the temperature of the second cooling area. Although the first regenerator 401 needs to heat up the coolant here, the temperature of the heated coolant is lower than the temperature of the second cooling area and higher than the temperature of the coolant flowing out of the first heat exchange tube section, which can prevent the temperature of the second cooling area from being too low. After the coolant flows out from the first heat exchanger 301 and the first regenerator 401, it flows into the inlet of the first coolant circuit, and then flows into the first heat exchange tube section for heat exchange. The above steps are cycled in this way.

[0047] In this embodiment, the evaporator of the coolant system adopts a plate heat exchanger, and the refrigerant exchanges heat with the coolant in a liquid-liquid manner, that is, the coolant flows into the first evaporator 2 and exchanges heat with the refrigerant in the first evaporator 2. Since the temperature requirements of the first cooling area and the second cooling area are different, the first cooling area requires a lower temperature. During the process of the low-temperature coolant flowing through the first heat exchanger 301, more cold energy can be released, reducing the temperature of the first cooling area. The second cooling area does not require a coolant with too low a temperature compared to the first cooling area. Therefore, even if low-temperature coolant flows out of the first heat exchange tube section, after the low-temperature coolant exchanges heat through the first regenerator 401, its temperature will increase to a certain extent, and thus the temperature of the second cooling area will not be too low.

[0048] In this embodiment, the first heat exchanger 301 and the first regenerator 401 are connected in series with the first evaporator 2, while the first cooling unit 3 and the second cooling unit 4 are connected in parallel. For different temperature regions, the heat load can be evenly distributed according to the equipment distribution area, and independent control of the temperature and cold energy of the coolant in each circuit can be achieved to meet the different temperature and cooling requirements of the equipment in each circuit.

[0049] As a specific embodiment, after applying the above refrigeration system to an aircraft, due to the different cooling requirements of the galley food truck and large electronic devices, the temperature of the secondary refrigerant flowing out of the first heat exchange tube section is -9°C. The galley food truck requires the ambient temperature around it to be 0 - 4°C, while the temperature at the location of the electronic devices is relatively high. If the temperature of the secondary refrigerant flowing through the electronic devices is lower than 24°C, condensate will be generated on the electronic devices. And to ensure the cooling effect, the temperature of the secondary refrigerant should not exceed 50°C. To meet the cooling requirements simultaneously, a first regenerator 401 is added at the location of the large electronic devices, which can increase the temperature of the secondary refrigerant at the location of the electronic devices, avoid a large temperature difference between the electronic devices and the secondary refrigerant, and prevent condensate from being generated on the electronic devices. In addition, under certain working conditions, the galley refrigeration unit does not need to operate, and only the electronic device cooling unit operates. At this time, the temperature of the secondary refrigerant does not need to be reduced to -9°C. The first evaporator 2 can operate with reduced power consumption and cool the secondary refrigerant to 24°C to meet the requirements. In this embodiment, setting the first regenerator 401 can ensure that the temperature of the secondary refrigerant at the inlet of the large electronic devices is higher than the dew point temperature to avoid the generation of condensate and affect the normal operation of the electronic devices, and at the same time ensure that the temperature of the secondary refrigerant after temperature rise is lower than 50°C to ensure the cooling effect.

[0050] Referring to Figure 4 As shown, the first secondary refrigerant circulation loop 1 further includes a second evaporator 5. The first evaporator 2 and the second evaporator 5 are connected in series. The first secondary refrigerant loop has a second heat exchange tube section. The inlet and outlet of the second heat exchange tube section are respectively connected to the inlet and outlet of the second evaporator 5. The inlet of the first heat exchange tube section is connected to the outlet of the first secondary refrigerant loop, and the outlet of the first heat exchange tube section is connected to the inlet of the second heat exchange tube section. The inlet of the first heat exchanger 301 is connected to the outlet of the second heat exchange tube section, and the inlet of the first regenerator 401 is connected to the outlet of the second heat exchange tube section.

[0051] Specifically, the secondary refrigerant flows through the first heat exchange tube section and then flows into the first evaporator 2, where it exchanges heat with the refrigerant in the first evaporator 2. The temperature of the secondary refrigerant is relatively low after flowing out of the first heat exchange tube section, completing the first heat exchange of the secondary refrigerant. The secondary refrigerant then flows into the second heat exchange tube and into the second evaporator 5, where it exchanges heat with the refrigerant in the second evaporator 5. The temperature of the secondary refrigerant flowing out of the second heat exchange tube section is even lower, completing the second heat exchange of the secondary refrigerant. The secondary refrigerant after the second heat exchange then flows into the first heat exchanger 301 and the first regenerator 401 respectively.

[0052] In this embodiment, the first evaporator 2 and the second evaporator 5 are connected in series. This setting enables the secondary refrigerant to complete heat exchange and is more suitable for places with a relatively large heat load. And when the heat load is relatively large, only the cooling capacity released by the first evaporator 2 is not sufficient to meet the usage requirements by reducing the temperature of the secondary refrigerant. Setting the second evaporator 5 enables the secondary refrigerant to undergo two heat exchanges to ensure that the temperature of the secondary refrigerant is low enough.

[0053] In another embodiment, the first heat exchange tube section can also be arranged on the air outlet path of the first evaporator 2 without being connected to the first evaporator 2, and the second heat exchange tube section can also be arranged on the air outlet path of the second evaporator 5 without being connected to the second evaporator 5. In this way, the temperature reduction of the secondary refrigerant can also be achieved.

[0054] Referring to Figure 4 As shown, the first secondary refrigerant circulation loop 1 further includes a liquid distribution unit 6. The liquid distribution unit 6 is arranged between the inlet of the first heat exchange tube section and the outlet of the first secondary refrigerant loop. The liquid distribution unit 6 includes an expansion tank 601, a first secondary refrigerant pump 602 and a filter 603. The inlet of the first secondary refrigerant pump 602 is connected to the outlet of the first secondary refrigerant loop through a first pipeline. The outlet of the first secondary refrigerant pump 602 is connected to the inlet of the filter 603. The outlet of the filter 603 is connected to the inlet of the first heat exchange tube section. A pressure relief valve is arranged between the outlet of the filter 603 and the inlet of the first heat exchange tube section. The interface of the expansion tank 601 is connected to the first pipeline.

[0055] Specifically, when the secondary refrigerant exchanges heat in the first heat exchanger 301 and the first regenerator 401, the temperature of the secondary refrigerant rises and flows into the first secondary refrigerant loop. After flowing out from the outlet of the first secondary refrigerant loop, the secondary refrigerant flows into the first secondary refrigerant pump 602 and the filter 603 in sequence. After being filtered by the filter 603, the secondary refrigerant flows into the first heat exchange tube section or first flows into the first heat exchange tube section and then into the second heat exchange tube section. The secondary refrigerant flows into the first evaporator 2 and the second evaporator 5 and exchanges heat with the refrigerant in the first evaporator 2 and the second evaporator 5. During this process, the expansion tank 601 stabilizes the pressure of the secondary refrigerant system and releases or absorbs the volume difference generated by the thermal expansion and contraction of the secondary refrigerant. The secondary refrigerant has a filling port and a drain port. The filling port is to load the secondary refrigerant into the expansion tank 601, and then the interface of the expansion tank 601 is connected to the pipeline in front of the first secondary refrigerant pump 602. The secondary refrigerant has a heating expansion coefficient, and the expansion tank 601 will automatically adapt to the volume change of the secondary refrigerant caused by temperature change. When the temperature rises, it absorbs the secondary refrigerant, and when the temperature drops, it releases the secondary refrigerant.

[0056] In this embodiment, the first secondary refrigerant pump 602 functions to pump the secondary refrigerant. The interface of the expansion tank 601 is connected to the return liquid of the first secondary refrigerant pump 602, which functions to ensure that the pipeline system maintains a positive pressure. The filter 603 can filter impurities in the secondary refrigerant.

[0057] Referring to Figure 4As shown, the liquid distribution unit 6 further includes a second secondary refrigerant pump 604 and a bypass valve 605. The second secondary refrigerant pump 604 and the first secondary refrigerant pump 602 are arranged in parallel. The inlet of the second secondary refrigerant pump 604 is connected to the outlet of the first secondary refrigerant circuit through a first pipeline, and the outlet of the second secondary refrigerant pump 604 is connected to the inlet of the filter 603. A first check valve 606 is provided between the outlet of the first secondary refrigerant pump 602 and the inlet of the filter 603, and a second check valve 607 is provided between the outlet of the second secondary refrigerant pump 604 and the inlet of the filter 603. The bypass valve 605 is arranged in parallel with the filter 603. The inlet of the bypass valve 605 is connected to the outlet of the first secondary refrigerant pump 602 and / or the outlet of the second secondary refrigerant pump 604, and the outlet of the bypass valve 605 is connected to the inlet of the first heat exchange pipe section.

[0058] Specifically, the first secondary refrigerant pump 602 is the main pump used under normal conditions, and the second secondary refrigerant pump 604 is the standby pump. When the first secondary refrigerant pump 602 is damaged, the second secondary refrigerant pump 604 is activated, greatly improving the system reliability. The first check valve 606 and the second check valve 607 can prevent the reverse flow of the secondary refrigerant. The bypass valve 605 realizes the bypass of the filter 603, that is, the secondary refrigerant does not flow through the filter 603.

[0059] Combined with reference to Figure 4 As shown, a first liquid temperature sensor 608 and a first pressure sensor 609 are provided on the first pipeline. The interface of the expansion tank 601 is arranged between the first liquid temperature sensor 608 and the first pressure sensor 609. A second pressure sensor is provided between the outlet of the first secondary refrigerant pump 602 and the inlet of the filter 603 or between the outlet of the second secondary refrigerant pump 604 and the inlet of the filter 603. A third pressure sensor 611 is provided between the outlet of the filter 603 and the inlet of the first heat exchange pipe section or between the outlet of the bypass valve 605 and the inlet of the first heat exchange pipe section.

[0060] Specifically, after the secondary refrigerant flows into the first pipeline, it first flows through the first liquid temperature sensor 608, and the first liquid temperature sensor 608 monitors the return temperature of the secondary refrigerant. Then it flows through the first pressure sensor 609, and the first pressure sensor 609 monitors the pre-pump pressure of the first secondary refrigerant pump 602 and the second secondary refrigerant pump 604. After the secondary refrigerant pump sends out the first secondary refrigerant pump 602 or the second secondary refrigerant pump 604, the second pressure sensor monitors the pressure from the pump outlet to the front of the filter 603, and the third pressure sensor 611 monitors the pressure from the pump outlet to the back of the filter 603. The pressure relief valve unloads the pressure of the secondary refrigerant at the outlet of the first secondary refrigerant pump 602 or the second secondary refrigerant pump 604 to prevent excessive pressure from affecting the pipeline.

[0061] In this embodiment, the normal-temperature secondary refrigerant after cooling each end user converges at the liquid distribution unit 6, passes through the self-sealing joint, and after being boosted by the first secondary refrigerant pump 602 under the monitoring of the first liquid temperature sensor 608 and the first pressure sensor 609, passes through the check valve, and under the monitoring of the second pressure sensor, passes through the filter 603 to filter out impurities. Then, under the monitoring of the third pressure sensor 611, when the pressure is too high, the pressure relief valve is opened to relieve the pressure to avoid damaging the pipeline, and then it returns to the front secondary refrigerant circuit through the self-sealing quick connector. In addition, the expansion tank 601 stabilizes the pressure of the secondary refrigerant system, releases / absorbs the volume difference generated by the thermal expansion and contraction of the secondary refrigerant. The expansion tank 601 is connected to the return liquid of the secondary refrigerant pump, which can ensure that the pipeline system maintains a positive pressure; a filling port and a drain port are provided at this place to perform the functions of liquid filling and liquid draining. A bypass valve 605 is provided at the filter 603. Under the monitoring of the second pressure sensor and the third pressure sensor 611, when the filter 603 is blocked, the liquid exits the liquid distribution unit 6 through the bypass valve 605.

[0062] As a specific implementation manner, the first secondary refrigerant pump 602 and the filter 603 are connected through a self-sealing joint, and the second secondary refrigerant pump 604 and the filter 603 are connected through a self-sealing joint, which can realize the quick disassembly and installation of the equipment and avoid the leakage of the secondary refrigerant to improve safety.

[0063] Refer to Figure 2 As shown, the first cooling unit 3 further includes a fan 307 and a heating film 302. The fan 307 is arranged on the air outlet path of the first heat exchanger 301, and the air outlet of the fan 307 faces the first cooling area; the heating film 302 is arranged beside the first heat exchanger 301.

[0064] Specifically, when the secondary refrigerant flows into the first heat exchanger 301, the first heat exchanger 301 realizes the heat exchange between the secondary refrigerant and the air, provides cooling air for the first cooling area, the fan 307 provides power for air circulation, the heating film 302 is an electric heating film 302, and the heating film 302 is used to realize the heating and defrosting function of the first heat exchanger 301 to ensure the heat exchange effect of the first heat exchanger 301. The first heat exchanger 301 and the first heat exchange pipe section are connected through a self-sealing joint, and the self-sealing joint can realize the quick disassembly and installation of the equipment and avoid the leakage of the secondary refrigerant to improve safety.

[0065] Refer to Figure 2As shown, the first cooling unit 3 further includes a return air temperature sensor 303, a first outlet air temperature sensor 304, a first inlet liquid temperature sensor 305, and a first outlet liquid temperature sensor 306; the first inlet liquid temperature sensor 305 is disposed between the inlet of the first heat exchanger 301 and the outlet of the first heat exchange pipe section; the first outlet liquid temperature sensor 306 is disposed between the outlet of the first heat exchanger 301 and the inlet of the first secondary refrigerant circuit; the return air temperature sensor 303 is disposed on the air inlet side of the first heat exchanger 301, and the outlet air temperature sensor is disposed at the air outlet of the blower 307.

[0066] Specifically, the return air temperature sensor 303 is used to monitor the return air temperature, the first outlet air temperature sensor 304 is used to monitor the outlet air temperature, the first inlet liquid temperature sensor 305 is used to monitor the inlet temperature of the secondary refrigerant, and the first outlet liquid temperature sensor 306 is used to monitor the outlet temperature of the secondary refrigerant.

[0067] In this embodiment, for the first cooling unit 3, the low-temperature secondary refrigerant passes through the self-sealing joint and enters the first heat exchanger 301 under the regulation of the flow regulating valve according to the feedback of the first inlet liquid temperature sensor 305 and the first outlet liquid temperature sensor 306, exchanges heat with the return air, the temperature of the low-temperature secondary refrigerant rises to become a normal-temperature secondary refrigerant, and the air temperature is reduced and then sent out by the blower 307 to the surrounding environment of the kitchen food truck to maintain the environmental temperature of 0 to 4°C. The normal-temperature secondary refrigerant returns to the front secondary refrigerant circuit after being monitored by the first outlet liquid temperature sensor 306, and the return air temperature and the outlet air temperature are respectively monitored by the return air temperature sensor 303 and the first outlet air temperature sensor 304.

[0068] In this embodiment, the first heat exchanger 301, the blower 307, the heating film 302, the return air temperature sensor 303, the first outlet air temperature sensor 304, the first inlet liquid temperature sensor 305, and the first outlet liquid temperature sensor 306 work together to be able to accurately detect whether the temperature of the secondary refrigerant can meet the cooling requirements of the first cooling zone, and monitor in real time according to the temperature change of the secondary refrigerant.

[0069] As a specific implementation manner, the heating film 302 does not always work. It can comprehensively judge whether frost is generated on the first heat exchanger 301 according to each sensor, and the heating film 302 works only when frost is generated and is turned off after a certain period of time.

[0070] Combined with reference to Figure 3As shown, the second cooling unit 4 further includes a first liquid cooling plate and a second liquid cooling plate. The first regenerator 401 includes a first heat exchange side and a second heat exchange side. The inlet of the first heat exchange side is connected to the outlet of the first heat exchange pipe section, and the outlet of the second heat exchange side is connected to the inlet of the first coolant circuit. The first heat exchange side is provided with a first branch 402 and a second branch 403. The inlet of the first branch 402 is connected to the outlet of the first heat exchange side, and the outlet of the first branch 402 is connected to the inlet of the first liquid cooling plate. The inlet of the second branch 403 is connected to the outlet of the first heat exchange side, and the outlet of the second branch 403 is connected to the inlet of the second liquid cooling plate. The second heat exchange side is provided with a third branch 404 and a fourth branch 405. The inlet of the third branch 404 is connected to the outlet of the first liquid cooling plate, and the outlet of the third branch 404 is connected to the inlet of the second heat exchange side. The first liquid cooling plate is disposed on the first device. The inlet of the fourth branch 405 is connected to the outlet of the second liquid cooling plate, and the outlet of the fourth branch 405 is connected to the inlet of the second heat exchange side. The second liquid cooling plate is disposed on the second device.

[0071] In this embodiment, the first heat exchange side is the cold side, that is, this side is used for the inflow of the low-temperature coolant. The second heat exchange side is the hot side, that is, this side is used for the outflow of the high-temperature coolant after heat exchange. The low-temperature coolant flows into the first heat exchange side, and the temperature of the coolant rises, cooling the second cooling area. Specifically, in this embodiment, it is specifically for cooling the first device and the second device. It is also possible not to set up the devices and only cool the areas with cooling requirements. The heated coolant flows into the first liquid cooling plate and the second liquid cooling plate respectively. The first liquid cooling plate and the second liquid cooling plate respectively release cold to the first device and the second device. The temperature of the coolant rises and flows out from the second heat exchange side, and then flows into the first coolant circuit. The first regenerator 401 is used for heat exchange between the cold-side coolant and the hot-side coolant, increasing the temperature of the coolant entering the electronic device and avoiding the generation of condensate water that affects the normal operation of the electronic device.

[0072] Refer to in combination Figure 3As shown in the figure, the second cooling unit 4 further includes a three-way valve 406, a first flow regulating valve 407, a second flow regulating valve 408, a second inlet liquid temperature sensor 409, a second outlet liquid sensor 410, and a third outlet liquid sensor 411; the three-way valve 406 is arranged between the inlet of the first heat exchange side and the outlet of the first heat exchange pipe section, the first valve port of the three-way valve 406 is connected to the outlet of the first heat exchange pipe section, the second valve port of the three-way valve 406 is connected to the inlet of the first heat exchange side, and the third valve port of the three-way valve 406 is connected to the outlet of the first heat exchange side; the first flow regulating valve 407 is arranged between the outlet of the first heat exchange side and the inlet of the first branch 402, and the second flow regulating valve 408 is arranged between the outlet of the first heat exchange side and the inlet of the second branch 403; a second inlet liquid temperature sensor 409 is arranged between the inlet of the first branch 402 and the outlet of the first heat exchange side or between the inlet of the second branch 403 and the outlet of the first heat exchange side; a second outlet liquid sensor 410 is arranged between the outlet of the third branch 404 and the inlet of the second heat exchange side, and a third outlet liquid sensor 411 is arranged between the outlet of the fourth branch 405 and the inlet of the second heat exchange side.

[0073] In this embodiment, the three-way valve 406 controls whether the coolant passes through the first heat exchanger 301. The second inlet liquid temperature sensor 409 monitors the inlet liquid temperature of the coolant. The first flow regulating valve 407 and the second flow regulating valve 408 regulate the coolant flow in the corresponding branches. The second outlet liquid sensor 410 and the third outlet liquid sensor 411 monitor the outlet liquid temperatures of the coolant in the third branch 404 and the fourth branch 405. In this embodiment, the inlet of the first branch 402 and the outlet of the first heat exchange side are connected by a self-sealing joint, the inlet of the second branch 403 and the outlet of the first heat exchange side are connected by a self-sealing joint, the outlet of the third branch 404 and the inlet of the second heat exchange side are connected by a self-sealing joint, and the outlet of the fourth branch 405 and the inlet of the second heat exchange side are connected by a self-sealing joint. The self-sealing joint can achieve the rapid disassembly and installation of the equipment and avoid the leakage of the coolant to improve safety.

[0074] As a specific implementation, the second cooling unit 4 has two working modes: the regenerative mode and the direct-through mode. When both the kitchen food truck and the electronic device have cooling requirements, the regenerative mode is adopted. The low-temperature coolant passes through the self-sealing joint. According to the feedback of the second inlet temperature sensor 409, under the control of the three-way valve 406, it sequentially passes through the cold-side inlet and outlet of the first regenerator 401, and the temperature is raised above the dew point temperature (such as 24 °C). The second flow regulating valve 408 adjusts the flow rate according to the feedback of the second outlet sensor 410, and then flows through the liquid cooling plate at the electronic device to cool the electronic device. The temperature rises to a certain temperature (such as 49 °C) and becomes a high-temperature coolant. It passes through the hot-side inlet and outlet of the first regenerator 401, the temperature drops and becomes a normal-temperature coolant, and returns to the first coolant circuit. It should be noted that when only one electronic device is connected to the second cooling unit 4, the first flow regulating valve 407 is normally closed at this time. This design method ensures the generalization of the equipment and can be replaced in case of equipment failure to ensure normal operation. When and only when the electronic device has a cooling requirement, the direct-through mode is adopted. The first evaporator 2 operates with reduced power consumption to provide normal-temperature coolant (such as 24 °C). According to the feedback of the second inlet temperature sensor 409, under the control of the three-way valve 406, the coolant directly cools the electronic device through the second flow regulating valve 408 without passing through the first regenerator 401.

[0075] As a specific implementation, the frequency of the first evaporator 2 is regulated by the compressor in the refrigeration distribution system.

[0076] Combined with reference to Figure 3 As shown, the first coolant circulation loop 1 further includes a third cooling unit 7. The first cooling unit 3, the second cooling unit 4, and the third cooling unit 7 are arranged in parallel. The second cooling unit 4 includes a second regenerator. The inlet of the second regenerator is connected to the outlet of the first heat exchange pipe section, and the outlet of the second regenerator is connected to the inlet of the first coolant circuit. The second regenerator is used to cool down the third cooling area.

[0077] In this embodiment, the working process of the third cooling unit 7 is the same as that of the second cooling unit 4, only the refrigeration areas are different. Specifically, the electronic devices to be cooled are different. That is, after the coolant flows through the cold-side outlet of the second regenerator, it enters two parallel circuits respectively. Each circuit is equipped with a flow regulating valve, and the flow rate can be adjusted respectively according to the feedback of the temperature sensor, so as to perform separate control according to the cooling capacity requirements of their respective electronic devices.

[0078] As a specific implementation, only three cooling units are listed in this embodiment. In other embodiments, according to the refrigeration requirements, more than three cooling units can be arranged in parallel with the first evaporator 2 or the second evaporator 5.

[0079] Combined with reference to Figure 1As shown, the refrigeration system further includes a second secondary coolant circulation loop 8. The second secondary coolant circulation loop 8 includes a third evaporator 9, a second secondary coolant loop, a fourth cooling unit 10, and a fifth cooling unit 11. The inlet and outlet of the third heat exchange pipe section are respectively connected to the inlet and outlet of the third evaporator 9. The fourth cooling unit 10 and the fifth cooling unit 11 are arranged in parallel. The fourth cooling unit 10 includes a second heat exchanger. The inlet of the second heat exchanger is connected to the outlet of the third heat exchange pipe section, and the outlet of the second heat exchanger is connected to the inlet of the second secondary coolant loop. The second regenerator is used to cool down the fourth cooling area. The fifth cooling unit 11 includes a third regenerator. The inlet of the third regenerator is connected to the outlet of the third heat exchange pipe section, and the outlet of the third regenerator is connected to the inlet of the second secondary coolant loop. The third regenerator is used to cool down the fifth cooling area.

[0080] In this embodiment, two secondary coolant circulation loops can be set simultaneously to cool multiple areas at different positions. For the second secondary coolant loop, the third evaporator 9 can make the low-temperature secondary coolant flow out of the third heat exchange pipe. Since the temperature requirements of the fourth cooling area and the fifth cooling area are different, the fourth cooling area requires a lower temperature. During the process of the low-temperature secondary coolant flowing through the second heat exchanger, more cold energy can be released, reducing the temperature of the fourth cooling area. The fifth cooling area does not require a secondary coolant with too low a temperature compared to the fourth cooling area. Therefore, even if the low-temperature secondary coolant flows out of the second heat exchange pipe section, after the heat exchange of the low-temperature secondary coolant through the second heat exchanger, the temperature will increase to a certain extent, so that the temperature of the fifth cooling area will not be too low.

[0081] As a specific implementation manner, the second secondary coolant circulation loop 8 also further includes another liquid distribution unit 6. The liquid distribution unit 6 is arranged between the inlet of the second heat exchange pipe section and the outlet of the second secondary coolant loop. The connection method, working mode, and components included in the liquid distribution unit 6 in the second secondary coolant circulation loop 8 are the same as those in the liquid distribution unit 6 in the first secondary coolant circulation loop 1, and will not be elaborated here.

[0082] As a specific implementation manner, the second secondary coolant circulation loop 8 further includes a fourth evaporator 12. The fourth evaporator 12 is connected in series with the third evaporator 9. The second secondary coolant loop has a fourth heat exchange pipe section. The inlet and outlet of the fourth heat exchange pipe section are respectively connected to the inlet and outlet of the fourth evaporator 12. The inlet of the fourth heat exchange pipe section is connected to the outlet of the second secondary coolant loop, and the outlet of the third heat exchange pipe section is connected to the inlet of the fourth heat exchange pipe section. The fourth evaporator 12 has the same function as the second evaporator 5.

[0083] As a specific implementation, an indirect refrigeration system with two secondary refrigerant circulation loops for transporting the secondary refrigerant can meet the cooling requirements of dispersed distribution equipment operating simultaneously. This set of equipment mainly includes four evaporators, two liquid distribution units, and four cooling units. The liquid distribution unit includes components such as pump assemblies, secondary refrigerant, and pipelines. The -9°C secondary refrigerant that has completed heat exchange at the evaporator is pushed by the pump assembly to transport cooling capacity to the end equipment. The first cooling unit and the fourth cooling unit release the cooling capacity of the secondary refrigerant into the surrounding environment of the kitchen food truck, thereby maintaining an ambient temperature of 0 to 4°C. Since the temperature of the secondary refrigerant is relatively low, directly transporting it to cool the electronic equipment will generate condensate and affect reliability. Therefore, the second cooling unit 4, the third cooling unit, and the fifth cooling unit can not only increase the temperature of the secondary refrigerant entering the electronic equipment but also ensure its cooling effect. Under the condition that the kitchen food truck does not require cooling capacity, it can also reduce energy consumption and achieve energy conservation.

[0084] Referring to Figure 1 As shown, the first evaporator 2 and the third evaporator 9 are connected in parallel. The first evaporator 2 and the third evaporator 9 are connected to the refrigeration distribution system, which is used to transport refrigerant to the first evaporator 2 and the third evaporator 9 respectively. The first evaporator 2 and the third evaporator 9 are both cooled by the same distribution system, simplifying the system circuit.

[0085] Referring to Figure 1 As shown, the inlet of the first heat exchanger 301 is connected to the outlet of the first heat exchange pipe section through a self-sealing joint, and the outlet of the first heat exchanger 301 is connected to the inlet of the first secondary refrigerant circuit through a self-sealing joint; the inlet of the first regenerator 401 is connected to the outlet of the first heat exchange pipe section through a self-sealing joint, and the outlet of the first regenerator 401 is connected to the inlet of the first secondary refrigerant circuit through a self-sealing joint. The self-sealing joint enables quick installation and disassembly and has relatively high safety.

[0086] Referring to Figure 1 As shown, an aircraft includes a refrigeration system, which is the above-mentioned refrigeration system. The first cooling area is the kitchen, and the second cooling area is the motor equipment installation area.

[0087] After applying the above refrigeration system to an aircraft, due to the different cooling requirements of the galley cart and large electronic devices, the temperature of the secondary refrigerant flowing out of the first heat exchange pipe section is -9°C. The galley cart requires the ambient temperature around it to be 0 - 4°C, while the temperature at the location of the electronic devices is relatively high. If the temperature of the secondary refrigerant flowing through the electronic devices is lower than 24°C, condensation water will be generated on the electronic devices. Moreover, to ensure the cooling effect, the temperature of the secondary refrigerant should not exceed 50°C. To meet the cooling requirements simultaneously, a first regenerator 401 is added at the location of the large electronic devices, which can increase the temperature of the secondary refrigerant at the location of the electronic devices, avoid a large temperature difference between the electronic devices and the secondary refrigerant, and prevent condensation water from being generated on the electronic devices. In addition, under certain working conditions, the galley refrigeration unit does not need to operate, and only the electronic device cooling unit operates. At this time, the temperature of the secondary refrigerant does not need to be reduced to -9°C, and the first evaporator 2 can operate with reduced power consumption and cool the secondary refrigerant to 24°C to meet the requirements. In this embodiment, setting the first regenerator 401 can ensure that the temperature of the secondary refrigerant at the inlet of the large electronic devices is higher than the dew point temperature to avoid the generation of condensation water and affect the normal operation of the electronic devices, and at the same time ensure that the temperature of the secondary refrigerant after temperature rise is lower than 50°C to ensure the cooling effect. Since the distribution range of each large device in the aircraft is relatively large, the installation position of the second secondary refrigerant circulation loop 8 can be reasonably set according to the positions of each large device.

[0088] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0089] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A refrigeration system, characterized in that: include: A first cooling circulation loop (1); The first secondary cooling circulation loop (1) comprises a first evaporator (2), a first secondary cooling agent loop, a first cooling unit (3) and a second cooling unit (4); the first secondary cooling agent loop has a first heat exchange pipe section, the inlet and outlet of the first heat exchange pipe section are respectively connected to the inlet and outlet of the first evaporator (2); the first cooling unit (3) and the second cooling unit (4) are arranged in parallel; The first cooling unit (3) comprises a first heat exchanger (301), the inlet of the first heat exchanger (301) is connected to the outlet of the first heat exchange pipe section, the outlet of the first heat exchanger (301) is connected to the inlet of the first coolant circuit, and the first heat exchanger (301) is used to cool the first cooling zone; The second cooling unit (4) comprises a first heat regenerator (401), the inlet of the first heat regenerator (401) is connected to the outlet of the first heat exchange pipe section, the outlet of the first heat regenerator (401) is connected to the inlet of the first refrigerant circuit, the first heat regenerator (401) is used to cool the second cooling zone, and the temperature of the first cooling zone is lower than the temperature of the second cooling zone.

2. The refrigeration system according to claim 1, characterized in that: The first cooling medium circulation loop (1) further comprises a second evaporator (5), the first evaporator (2) and the second evaporator (5) are connected in series, the first cooling medium loop comprises a second heat exchange pipe section, the inlet and outlet of the second heat exchange pipe section are respectively connected to the inlet and outlet of the second evaporator (5), the inlet of the first heat exchange pipe section is connected to the outlet of the first cooling medium loop, and the outlet of the first heat exchange pipe section is connected to the inlet of the second heat exchange pipe section; The inlet of the first heat exchanger (301) is connected to the outlet of the second heat exchange pipe section, and the inlet of the first heat regenerator (401) is connected to the outlet of the second heat exchange pipe section.

3. The refrigeration system according to claim 1, characterized in that: The first coolant circulation loop (1) also includes a liquid distribution unit (6), which is arranged between the inlet of the first heat exchange pipe section and the outlet of the first coolant loop. The liquid distribution unit (6) includes an expansion tank (601), a first coolant pump (602) and a filter (603). The inlet of the first coolant pump (602) is connected to the outlet of the first coolant loop through a first pipeline, the outlet of the first coolant pump (602) is connected to the inlet of the filter (603), and the outlet of the filter (603) is connected to the inlet of the first heat exchange pipe section; the interface of the expansion tank (601) is connected to the first pipeline.

4. The refrigeration system according to claim 3, characterized in that: The liquid distribution unit (6) further comprises a second coolant pump (604) and a bypass valve (605), wherein the second coolant pump (604) and the first coolant pump (602) are arranged in parallel, wherein the inlet of the second coolant pump (604) is connected to the outlet of the first coolant circuit via a first pipeline, and the outlet of the second coolant pump (604) is connected to the inlet of the filter (603); A first one-way valve (606) is provided between the outlet of the first coolant pump (602) and the inlet of the filter (603), and a second one-way valve (607) is provided between the outlet of the second coolant pump (604) and the inlet of the filter (603); The bypass valve (605) is arranged in parallel with the filter (603), the inlet of the bypass valve (605) is connected to the outlet of the first coolant pump (602) and / or the outlet of the second coolant pump (604), and the outlet of the bypass valve (605) is connected to the inlet of the first heat exchange pipe section.

5. The refrigeration system according to claim 4, characterized in that: A first liquid temperature sensor (608) and a first pressure sensor (609) are provided on the first pipeline, and the interface of the expansion tank (601) is provided between the first liquid temperature sensor (608) and the first pressure sensor (609); a second pressure sensor (610) is provided between the outlet of the first coolant pump (602) and the inlet of the filter (603) or between the outlet of the second coolant pump (604) and the inlet of the filter (603), and a third pressure sensor (611) is provided between the outlet of the filter (603) and the inlet of the first heat exchange pipe section or between the outlet of the bypass valve (605) and the inlet of the first heat exchange pipe section.

6. The refrigeration system according to claim 1, characterized in that: The first cooling unit (3) further comprises a fan (307) and a heating film (302); the fan (307) is arranged on an air outlet path of the first heat exchanger (301), and an air outlet of the fan (307) faces the first cooling zone; the heating film (302) is arranged beside the first heat exchanger (301).

7. The refrigeration system according to claim 6, characterized in that: The first cooling unit (3) further comprises a return air temperature sensor (303), a first outlet air temperature sensor (304), a first liquid inlet temperature sensor (305) and a first liquid outlet temperature sensor (306); The first liquid inlet temperature sensor (305) is arranged between the inlet of the first heat exchanger (301) and the outlet of the first heat exchange pipe section; the first liquid outlet temperature sensor (306) is arranged between the outlet of the first heat exchanger (301) and the inlet of the first coolant circuit; The return air temperature sensor (303) is arranged at the air inlet side of the first heat exchanger (301), and the outlet air temperature sensor (304) is arranged at the air outlet of the fan (307).

8. The refrigeration system according to claim 1, characterized in that: The second cooling unit (4) further comprises a first liquid cooling plate and a second liquid cooling plate, the first heat exchanger (401) comprises a first heat exchange edge and a second heat exchange edge, the inlet of the first heat exchange edge is connected to the outlet of the first heat exchange pipe section, and the outlet of the second heat exchange edge is connected to the inlet of the first coolant circuit; The first heat exchange edge is provided with a first branch (402) and a second branch (403), the inlet of the first branch (402) is connected to the outlet of the first heat exchange edge, the outlet of the first branch (402) is connected to the inlet of the first liquid cooling plate, the inlet of the second branch (403) is connected to the outlet of the first heat exchange edge, and the outlet of the second branch (403) is connected to the inlet of the second liquid cooling plate; The second heat exchange edge is provided with a third branch (404) and a fourth branch (405), the inlet of the third branch (404) is connected to the outlet of the first liquid cooling plate, and the outlet of the third branch (404) is connected to the inlet of the second heat exchange edge, and the first liquid cooling plate is arranged on the first device; the inlet of the fourth branch (405) is connected to the outlet of the second liquid cooling plate, and the outlet of the fourth branch (405) is connected to the inlet of the second heat exchange edge, and the second liquid cooling plate is arranged on the second device.

9. The refrigeration system according to claim 8, characterized in that: The second cooling unit (4) further comprises a three-way valve (406), a first flow regulating valve (407), a second flow regulating valve (408), a second liquid inlet temperature sensor (409), a second liquid outlet sensor (410) and a third liquid outlet sensor (411); The three-way valve (406) is arranged between the inlet of the first heat exchange edge and the outlet of the first heat exchange pipe section, the first valve port of the three-way valve (406) is connected to the outlet of the first heat exchange pipe section, the second valve port of the three-way valve (406) is connected to the inlet of the first heat exchange edge, and the third valve port of the three-way valve (406) is connected to the outlet of the first heat exchange edge; The first flow regulating valve (407) is arranged between the outlet of the first heat exchange edge and the inlet of the first branch (402), and the second flow regulating valve (408) is arranged between the outlet of the first heat exchange edge and the inlet of the second branch (403); The second liquid inlet temperature sensor (409) is arranged between the inlet of the first branch (402) and the outlet of the first heat exchange edge or between the inlet of the second branch (403) and the outlet of the first heat exchange edge; the second liquid outlet sensor (410) is arranged between the outlet of the third branch (404) and the inlet of the second heat exchange edge, and the third liquid outlet sensor (411) is arranged between the outlet of the fourth branch (405) and the inlet of the second heat exchange edge.

10. The refrigeration system according to claim 1, characterized in that: The first cooling medium circulation loop (1) also includes a third cooling unit (7), the first cooling unit (3), the second cooling unit (4) and the third cooling unit (7) are arranged in parallel, the second cooling unit (4) includes a second heat regenerator, the inlet of the second heat regenerator is connected to the outlet of the first heat exchange pipe section, the outlet of the second heat regenerator is connected to the inlet of the first cooling medium loop, and the second heat regenerator is used to cool the third cooling zone.

11. The refrigeration system according to any one of claims 1 to 10, characterized in that: The refrigeration system further comprises a second cooling medium circulation circuit (8), the second cooling medium circulation circuit (8) comprising a third evaporator (9), a second cooling medium circuit, a fourth cooling unit (10) and a fifth cooling unit (11), the third evaporator (9) having a third heat exchange pipe section, the inlet and the outlet of the third heat exchange pipe section being respectively connected to the inlet and the outlet of the third evaporator (9), and the fourth cooling unit (10) and the fifth cooling unit (11) being arranged in parallel; The fourth cooling unit (10) comprises a second heat exchanger, the inlet of the second heat exchanger is connected to the outlet of the third heat exchange pipe section, the outlet of the second heat exchanger is connected to the inlet of the second coolant circuit, and the second heat exchanger is used to cool the fourth cooling zone; The fifth cooling unit (11) comprises a third heat regenerator, the inlet of the third heat regenerator is connected to the outlet of the third heat exchange pipe section, the outlet of the third heat regenerator is connected to the inlet of the second coolant circuit, and the third heat regenerator is used to cool the fifth cooling zone.

12. The refrigeration system according to claim 11, characterized in that: The first evaporator (2) and the third evaporator (9) are arranged in parallel, and the first evaporator (2) and the third evaporator (9) are connected to a refrigeration distribution system, and the refrigeration distribution system is used to transport refrigerant to the first evaporator (2) and the third evaporator (9) respectively.

13. The refrigeration system according to claim 1, characterized in that: The inlet of the first heat exchanger (301) is connected to the outlet of the first heat exchange pipe section through a self-sealing joint, and the outlet of the first heat exchanger (301) is connected to the inlet of the first refrigerant circuit through a self-sealing joint; the inlet of the first heat regenerator (401) is connected to the outlet of the first heat exchange pipe section through a self-sealing joint, and the outlet of the first heat regenerator (401) is connected to the inlet of the first refrigerant circuit through a self-sealing joint.

14. An aircraft, comprising a refrigeration system, wherein the refrigeration system is the refrigeration system according to any one of claims 1 to 13, wherein the first cooling area is a kitchen, and the second cooling area is a motor equipment installation area.

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