Refrigeration device, refrigeration system and vehicle

Abstract

The application discloses a refrigerating device, a refrigerating system and a vehicle, and relates to the technical field of refrigerating devices, and in particular to a refrigerating device, a refrigerating system and a vehicle. The refrigerating device comprises: an inner container, which has a storage cavity; a refrigerating module, which is arranged in the inner container, and has a cold end and a hot end, wherein the cold end is configured to exchange heat with the storage cavity; a cold storage module, which is in heat exchange cooperation with the hot end; and a first heat exchanger, which is in heat exchange cooperation with the cold storage module and is used for supplying cold to the cold storage module. According to the refrigerating device provided by the application, the first heat exchanger and the cold storage module are arranged, the cold storage module can be used for cold storage, and the energy consumption of the refrigerating device is reduced.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and in particular to a refrigeration device, refrigeration system, and vehicle. Background Technology

[0002] In recent years, the development of new energy vehicles has experienced explosive growth, and mainstream automakers are increasingly focusing on user needs to enhance their market competitiveness. With rising living standards and increased outdoor activities, car refrigerators have become a symbol of a high-quality lifestyle for car owners. However, car refrigerators in related technologies consume a significant amount of energy. Summary of the Invention

[0003] One object of the present invention is to provide a refrigeration device, refrigeration system and vehicle, which is provided with a first heat exchanger and a cold storage module, and can use the cold storage module to store cold and reduce the energy consumption of the refrigeration device.

[0004] A refrigeration device according to an embodiment of the present invention includes: an inner liner, a refrigeration module, and a cold storage module, wherein the inner liner has a storage cavity; the refrigeration module is disposed in the inner liner and has a cold end and a hot end, wherein the cold end is configured to exchange heat with the storage cavity; the cold storage module is in heat exchange cooperation with the hot end; and a first heat exchanger is in heat exchange cooperation with the cold storage module.

[0005] According to an embodiment of the present invention, a refrigeration device is provided with a first heat exchanger and a cold storage module, which can store cold energy and reduce the energy consumption of the refrigeration device.

[0006] In addition, the refrigeration apparatus according to the above embodiments of the present invention may also have the following additional technical features:

[0007] In some embodiments, the cold storage module is configured to absorb and store the cold energy of the first heat exchanger when the refrigeration device is in a first operating state, and the cold storage module is further configured to release the cold energy to the hot end and / or the storage cavity when the refrigeration device is in a second operating state.

[0008] In some embodiments, the first heat exchanger is in a refrigerant-flowing state in the first operating state, and in a refrigerant-non-flowing state in the second operating state; or

[0009] The first heat exchanger is connected to the compressor. In the first operating state, the compressor is in a working state, and in the second operating state, the compressor is in a stopped working state.

[0010] In some embodiments, when the operating parameters of the refrigeration device meet a first condition, the refrigeration device is configured to operate in a second operating state; wherein the first condition includes at least one of the following: the cold storage module completes cold storage, the temperature of the cold storage module is less than or equal to a first temperature threshold, and the temperature inside the storage cavity is lower than a second temperature threshold.

[0011] In some embodiments, the cold storage module includes a phase change material.

[0012] In some embodiments, the first temperature threshold is determined based on the phase change temperature and supercooling of the phase change material.

[0013] In some embodiments, when the operating parameters of the refrigeration device meet a second condition, the refrigeration device is configured to operate in a first operating state, the second condition including: the temperature of the cold storage module or the storage cavity is greater than or equal to a third temperature threshold.

[0014] In some embodiments, the second temperature threshold is determined based on the phase change temperature of the phase change material of the cold storage module.

[0015] In some embodiments, when the temperature inside the storage cavity is below a fourth temperature threshold, the refrigeration device operates in a second operating state and the refrigeration module stops working or operates at low power.

[0016] In some embodiments, the refrigeration device includes a normal operating mode and an energy-saving operating mode, and the second operating state operates in the energy-saving operating mode.

[0017] In some embodiments, when the vehicle's operating state meets energy-saving conditions, it enters the energy-saving working mode. The energy-saving conditions include at least one of the following: the battery charge is lower than a set value, the ambient temperature is lower than a set ambient temperature threshold, and an energy-saving signal is received.

[0018] In some embodiments, the refrigeration module operates at rated power or maximum power in the normal operating mode.

[0019] In some embodiments, the cooling module includes a semiconductor cooling chip.

[0020] In some embodiments, the refrigeration device is a vehicle refrigerator.

[0021] In some embodiments, the cold storage module and the storage cavity are located on opposite sides of the first heat exchanger.

[0022] In some embodiments, the cold storage module includes a heat-conducting layer and a heat-insulating layer. The heat-conducting layer is in heat exchange cooperation with the first heat exchanger and the refrigeration module, respectively, and the heat-insulating layer is disposed on the side of the heat-conducting layer away from the first heat exchanger and the refrigeration module.

[0023] In some embodiments, the first heat exchanger is located on the outside of the inner liner, and at least a portion of the refrigeration module is located on the side of the first heat exchanger closer to the inner liner.

[0024] In some embodiments, the first heat exchanger is arranged around the inner liner, and the refrigeration module is located inside the first heat exchanger.

[0025] According to an embodiment of the present invention, a refrigeration system includes a compressor, an air conditioning unit, and the aforementioned refrigeration unit, wherein the compressor is connected to the air conditioning unit and the first heat exchanger.

[0026] The vehicle according to an embodiment of the present invention includes the aforementioned refrigeration device or the aforementioned refrigeration system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a refrigeration device according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the cold storage module of a refrigeration device according to an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of a refrigeration system according to an embodiment of the present invention.

[0030] Figure 4 This is a flowchart illustrating a control method for a refrigeration system according to an embodiment of the present invention.

[0031] Reference numerals: Refrigeration unit 10, inner liner 11, refrigeration module 12, cold storage module 13, heat-conducting layer 131, insulation layer 132, charging port 1301, first heat exchanger 14, compressor 20, condenser 210, second heat exchanger 211, third heat exchanger 212, first expansion valve 22, first solenoid valve 23, first throttle valve 24, second solenoid valve 25, third solenoid valve 26, second throttle valve 28, fourth solenoid valve 29, fifth solenoid valve 30, thermal management integrated module 31. Detailed Implementation

[0032] Currently, most car refrigerators on the market use independent compressors, which suffer from problems such as high vibration and noise, and the emission of waste heat into the passenger compartment. Furthermore, most car models only have one refrigerator, which cannot simultaneously meet the diverse needs of customers. For example, in related car refrigerator technologies, a scheme where the semiconductor cooling module is closely attached to the cold storage module achieves different cooling rates for different areas. Another scheme shares a compressor with the refrigerator, air conditioner, and battery pack. In this scheme, the cold storage unit is connected in series with the refrigerator, increasing the flow resistance of the refrigerator branch. Simultaneously, this scheme is limited by the thermal conductivity of the phase change material, and the semiconductor cooling chip cannot maintain a low cold-end temperature for extended periods. In another scheme, the refrigerator evaporator is inside the refrigerator; when the semiconductor and refrigerator evaporators operate simultaneously, the temperature of the refrigerator evaporator affects the cooling effect of the semiconductor cooling chip. This scheme cannot implement direct heating and still requires a heating film.

[0033] Therefore, the present invention provides several implementations of refrigeration devices that can improve the energy efficiency of refrigeration equipment.

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] like Figure 1 According to an embodiment of the present invention, a refrigeration device 10 includes: an inner liner 11, a refrigeration module 12, a cold storage module 13, and a first heat exchanger 14. The inner liner 11 has a storage cavity that can accommodate items, thereby allowing the refrigeration device 10 to refrigerate the items. The refrigeration module 12 is disposed within the inner liner 11 and has a cold end and a hot end. The refrigeration module 12 can transfer heat from the cold end to the hot end, thereby achieving refrigeration using the cold end. The cold end is configured to exchange heat with the storage cavity, allowing heat exchange between the cold end and the internal space of the inner cavity, thus refrigerating the storage cavity using the refrigeration module 12 and achieving the purpose of cooling the items stored in the storage cavity. The cold storage module 13 exchanges heat with the hot end, allowing the cold storage module 13 to dissipate heat from the hot end, thereby improving the energy efficiency of the refrigeration module 12 and enhancing the refrigeration effect on the inner cavity of the inner liner 11. The first heat exchanger 14 exchanges heat with the cold storage module 13 and is used to supply cooling to the cold storage module 13. The first heat exchanger 14 supplies cooling to the cold storage module 13, which can send out the heat from the hot end of the refrigeration module 12, thereby achieving heat dissipation from the hot end.

[0036] In addition, the first heat exchanger 14 can also be configured to exchange heat directly with the inner liner 11, thereby using the first heat exchanger 14 to cool the storage cavity. The cooperation between the first heat exchanger 14 and the cold storage module 13 can store the cold energy generated by the first heat exchanger 14 in the cold storage module 13, so that when the first heat exchanger 14 is not running, the cold outlet module can be used to dissipate heat from the hot end and cool the storage cavity.

[0037] In this invention, by setting up a cold storage module 13, the cold storage module 13 can dissipate heat from the hot end of the refrigeration module 12, thereby providing a better operating environment for the refrigeration module 12 and improving its cooling capacity. Furthermore, the cold storage module 13 can store a portion of the cold energy of the first heat exchanger 14. After the cold storage module 13 has stored the cold energy, it can be used to dissipate heat from the refrigeration device 10, allowing the first heat exchanger 14 to operate at a higher energy efficiency. When it is not necessary to use the first heat exchanger 14 to dissipate heat from the refrigeration module 12, the cold energy is stored in the cold storage module 13, thereby improving the energy efficiency of the refrigeration device 10 and reducing energy consumption.

[0038] According to the refrigeration device 10 of the present invention, the refrigeration device 10 can have multiple operating modes. It can use the refrigeration module 12 to refrigerate the inner liner 11 and use the first heat exchanger 14 and / or the cold storage module 13 to dissipate heat from the refrigeration device 10, so that the first heat exchanger 14 can operate efficiently. When the cold storage module 13 meets the heat dissipation requirements, the first heat exchanger 14 is turned off, thereby reducing the energy consumption of the refrigeration device 10 and improving the performance of the refrigeration device 10.

[0039] The refrigeration device 10 of the present invention can have multiple operating states, including but not limited to the following operating states:

[0040] In the first operating state, the first heat exchanger 14 is in operation, for example, in a cooling state, and the cold storage module 13 is configured to absorb and store the cold energy of the first heat exchanger 14. This reduces cold energy waste and achieves energy saving.

[0041] In one possible implementation, in the first operating state, the refrigeration module 12 is in a working state, the cold end of the refrigeration module 12 exchanges heat with the storage cavity, and the hot end of the refrigeration module 12 exchanges heat with the first heat exchanger 14. The heat generated by the hot end of the refrigeration module 12 can be dissipated by the first heat exchanger 14 to maintain the energy efficiency and cooling capacity of the refrigeration module 12.

[0042] In another possible implementation, in the first operating state, the refrigeration module 12 stops working, and the first heat exchanger 14 exchanges heat with the internal space of the inner liner 11, thereby using the first heat exchanger 14 to cool the internal space of the inner liner 11 or the items stored in the inner liner 11.

[0043] The cooling module 12 can be, for example, but not limited to, a semiconductor cooling chip. The cooling module 12 can be switched between an operating state and a non-operating state by energizing or de-energizing it.

[0044] In the second operating state, the cold storage module 13 releases cold energy to the hot end and / or the storage cavity, cooling or insulating the storage cavity of the inner liner 11 and the items inside. In the second operating state, the cold storage module 13 can utilize the cold energy absorbed and stored during the first operating state to cool or insulate the storage cavity of the inner liner 11 and the items inside. This fully utilizes the cold energy generated by the first heat exchanger 14 in the first operating state, improving energy efficiency.

[0045] In the second operating state, the first heat exchanger 14 is in a stopped state. This reduces the energy consumption of the first heat exchanger 14.

[0046] In one possible implementation, in the second operating state, the refrigeration module 12 is in operation, and the cold end of the refrigeration module 12 exchanges heat with the storage cavity, thereby cooling or insulating the storage cavity of the inner liner 11 and the items inside the storage cavity. The cold storage module 13 dissipates heat from the hot end of the refrigeration module.

[0047] In another possible implementation, in the second operating state, the refrigeration module 12 is in a stopped working state, and the cold storage module 13 exchanges heat with the storage cavity to cool or keep warm the storage cavity of the inner liner 11 and the items inside the storage cavity.

[0048] Optionally, the first heat exchanger 14 is connected to the compressor. In the first operating state, the compressor is in a working state, and in the second operating state, the compressor is in a stopped state. Alternatively, it can be configured such that: in the first operating state, the first heat exchanger 14 is in a refrigerant-flowing state, and in the second operating state, the first heat exchanger 14 is in a non-refrigerant-flowing state.

[0049] Optionally, the compressor in this application may be a compressor shared with the vehicle's air conditioning system, or it may be a separate compressor of the refrigeration unit 10.

[0050] Of course, the operating states of the refrigeration device 10 in this invention may include, but are not limited to, the above-described embodiments. For example, the combination of the above-described different operating states can form a new operating state.

[0051] Compared to refrigeration systems in related technologies, in this invention, a cold storage module 13 surrounds the periphery of the first heat exchanger 14. A refrigeration module 12 (e.g., a thermoelectric cooler) is arranged inside the first heat exchanger 14. The refrigeration device 10 has multiple operating modes during refrigeration. The main operating state is thermoelectric refrigeration (i.e., refrigeration using the refrigeration module 12), where the thermoelectric cooler is cooled by the low-temperature refrigerant in the first heat exchanger 14. This invention can achieve a more energy-efficient mode. After the refrigerant temperature in the cold storage module 13 reaches below the phase change temperature, the compressor can be shut down or the branch connecting to the refrigeration module 12 in the refrigeration system can be closed, and the cold energy in the cold storage module 13 will cool the refrigeration module 12 to achieve cooling. When the temperature of the phase change material in the cold storage module 13 rises or the wall temperature of the first heat exchanger 14 exceeds the set temperature, the compressor can be restarted or the branch connecting to the refrigeration module 12 in the refrigeration system can be reconnected.

[0052] Optionally, in this invention, the cold storage module 13 has a simple structure and is made of two materials: a heat-conducting layer 131 with high thermal conductivity is attached to the first heat exchanger 14, and a heat-insulating layer 132 with low thermal conductivity is attached to the other side. In this invention, when the refrigeration device 10 enters the temperature maintenance mode, the internal temperature of the storage cavity can be finely adjusted through the refrigeration module 12 to reduce the number of compressor start-stop cycles.

[0053] In this embodiment, the refrigeration device 10 can switch between a first operating state and a second operating state, and use a cold storage device to store and release cold energy, thereby making full use of the cold energy generated or released by the first heat exchanger to achieve energy saving.

[0054] In some optional embodiments, when the operating parameters of the refrigeration device meet a first condition, the refrigeration device is configured to operate in a second operating state; wherein the first condition includes: the cold storage module completing cold storage; and / or, the temperature T1 of the cold storage module being lower than a first temperature threshold; and / or, the temperature inside the storage cavity being lower than a second temperature threshold. Thus, after the cold storage device has absorbed and stored a certain amount of cold energy, or after the temperature inside the storage cavity is sufficiently low, the refrigeration device 10 switches to the second operating state, which can reduce the operating energy consumption of the first heat exchanger.

[0055] The cold storage module includes a phase change material. The phase change material can store or release cold energy using a phase change.

[0056] The first temperature threshold is determined based on the phase change temperature and supercooling of the cold storage material.

[0057] For example, the first temperature threshold can be the difference between the phase change temperature and the supercooling temperature of the phase change material.

[0058] When the operating parameters of the refrigeration unit 10 meet the first condition, the compressor can be stopped so that the refrigeration unit 14 can switch to the second operating state.

[0059] Optionally, when the operating parameters of the refrigeration device meet the second condition, the refrigeration device is configured to operate in a first operating state. The second condition includes: the temperature of the cold storage module or the storage cavity is greater than or equal to a third temperature threshold.

[0060] In this way, the cold storage module 13 can absorb and store cold energy in the first operating state.

[0061] The second temperature threshold is determined based on the phase change temperature of the phase change material in the cold storage module.

[0062] For example, the second temperature threshold can be the phase change temperature of the phase change material in the cold storage module.

[0063] Optionally, when the temperature inside the storage cavity is lower than a fourth temperature threshold, the refrigeration device (10) operates in a second operating state and the refrigeration module stops working or operates at low power. The fourth temperature threshold can be user-set or factory-set. For example, the fourth temperature threshold can be lower than the third temperature threshold.

[0064] In this way, the refrigeration device 10 switches between the first operating state and the second operating state, which can make fuller use of the cooling capacity and achieve energy saving.

[0065] In some alternative embodiments, the refrigeration device includes a normal operating mode and an energy-saving operating mode, with the second operating state operating in the energy-saving operating mode.

[0066] Optionally, the decision to enter the energy-saving operating mode can be based on the overall vehicle status. For example, the energy-saving operating mode is entered when the vehicle's operating status meets energy-saving conditions, which include at least one of the following: battery charge is lower than a set value, ambient temperature is lower than a set ambient temperature threshold, or an energy-saving signal is received.

[0067] Optionally, in normal operating mode, the cooling module 12 operates at rated power or maximum power.

[0068] The refrigeration device 10 in this invention can be a vehicle refrigerator.

[0069] Optionally, the cold storage module and the storage chamber are located on opposite sides of the first heat exchanger.

[0070] like Figure 1The cold storage module 13 is located outside the first heat exchanger 14. It can exchange heat with the inner liner 11 using the first heat exchanger 14, thereby cooling the internal space of the inner liner 11. The cold energy stored in the cold storage module 13 can be used to dissipate heat from the cooling module 12, and the first heat exchanger 14 can also supply cooling to the cold storage module 13, facilitating rapid cold storage. Specifically, the first heat exchanger 14 and the cooling module 12 are located outside the inner liner 11, and the cold storage module 13 is located outside both. The cold energy supplied by the first heat exchanger 14 can be fully utilized. A portion of the cold energy from the first heat exchanger 14 will exchange heat with the internal space of the inner liner 11, thereby cooling the storage cavity and the items within it. The remaining cold energy from the first heat exchanger 14 will be stored in the cold storage module 13, allowing it to dissipate heat from the cooling module 12 when the first heat exchanger 14 is not operating. This can reduce or avoid ineffective heat exchange between the first heat exchanger 14 and the outside of the refrigeration device 10, thereby effectively improving the refrigeration efficiency and energy efficiency of the refrigeration device 10.

[0071] To achieve cold storage in the cold storage module 13, a medium with a high specific heat capacity can be used, or a medium capable of storing cold energy through phase change can be used. In some embodiments, the cold storage module 13 contains a phase change medium configured to store and release cold energy through phase change. For example, when the cold storage module 13 supplies cooling, the phase change medium can change to a liquid state to store cold energy; when the cold storage module 13 releases cooling, the phase change medium can gradually change from a liquid state to a gas state and absorb heat from the outside to dissipate heat from the cooling module 12. Of course, the cold storage module 13 in this invention can also be configured to achieve cold storage and release through a phase change between liquid and solid. The phase change medium in this invention can include organic phase change materials, inorganic phase change materials, and eutectic phase change materials, etc.

[0072] In this design, the phase change temperature of the phase change medium in the cold storage module 13 is set to T1, the subcooling of the phase change medium is set to T2, and the temperature of the refrigerant in the first heat exchanger 14 is set to T3, wherein (T1-T2)-T3≥5℃. During the cooling process of the first heat exchanger 14, the cooling capacity supplied by the first heat exchanger 14 can be used to quickly induce a phase change in the phase change medium in the cold storage module 13, thereby facilitating the cold storage of the cold storage module 13 and optimizing the stability and cold storage effect of the cold storage module 13.

[0073] like Figure 2In some embodiments, the cold storage module 13 includes a heat-conducting layer 131 and a heat-insulating layer 132. The heat-conducting layer 131 is in heat exchange cooperation with the first heat exchanger 14 and the refrigeration module 12, respectively. The heat-insulating layer 132 is disposed on the side of the heat-conducting layer 131 away from the first heat exchanger 14 and the refrigeration module 12. In this way, the heat-conducting layer 131 can exchange heat with the first heat exchanger 14 and the refrigeration module 12, as well as with the cold storage medium inside the cold storage module 13. For example, during the cold storage process, the cold energy supplied by the first heat exchanger 14 can be transferred to the cold storage medium more quickly through the heat-conducting layer 131, so as to utilize the cold storage medium to store the cold energy; during the cooling process, the cold energy generated by the cold storage medium can be quickly transferred to the hot end of the refrigeration module 12 through the heat-conducting layer 131, so as to utilize the cold storage module 13 to dissipate heat from the hot end.

[0074] In addition, by setting the heat insulation layer 132, the cold storage module 13 can be kept warm, thereby improving the cold storage effect and stability and reducing the loss of cold energy. In conjunction with the above embodiments, the inner liner 11, the first heat exchanger 14 and the refrigeration module 12 are all located inside the cold storage module 13, and the inner liner 11, the first heat exchanger 14 and the refrigeration module 12 can exchange heat with the cold storage medium (such as the aforementioned phase change medium) in the cold storage module 13 through the heat-conducting layer 131. The heat insulation layer 132 can keep the cold storage medium, the first heat exchanger 14, the refrigeration module 12 and the inner liner 11 warm, reduce the loss of cold energy, thereby reducing energy loss and improving energy efficiency.

[0075] The cold storage module 13 is also provided with a filling hole 1301 to facilitate the filling of phase change medium or cold storage medium into the cold storage module 13. The phase change filling hole 1301 can be located in the heat insulation layer 132 and sealed with a sealing component. Alternatively, the cold storage module can be configured in a spliced ​​form, without the filling hole.

[0076] In some embodiments, the first heat exchanger 14 is located on the outside of the inner liner 11, and at least a portion of the refrigeration module 12 is located on the side of the first heat exchanger 14 near the inner liner 11. Specifically, at least a portion of the refrigeration module 12 can be located between the inner liner 11 and the first heat exchanger 14, with the hot end of the refrigeration module 12 engaging with the first heat exchanger 14 for heat exchange, and the cold end of the refrigeration module 12 engaging with the inner liner 11 for heat exchange. This simplifies the structure of the refrigeration device 10 and facilitates the use of the refrigeration module 12 to cool the inner liner 11 and the items stored inside.

[0077] Optionally, the first heat exchanger 14 is arranged around the inner liner 11, and the refrigeration module 12 is located inside the first heat exchanger 14. This can improve the refrigeration effect on the inner liner 11 and the items stored inside it.

[0078] Specifically, the refrigeration device 10 of the present invention may include an inner liner 11, a refrigeration module 12, a first heat exchanger 14, and a cold storage module 13 distributed from the inside out. The inner liner 11 has a storage cavity for storing items. The refrigeration module 12 is connected to the inner liner 11 and can exchange heat using its cold end, the internal space of the inner liner 11, and the items stored in the inner liner 11. The first heat exchanger 14 is wound around the outside of the inner liner 11 and cooperates with the hot end of the refrigeration module 12 for heat exchange. The cold storage module 13 is wound around the outside of the inner liner 11 and stacked on the outside of the first heat exchanger 14. The cold storage module 13 has a heat-conducting layer 131 on the inner side, a heat-insulating layer 132 on the outer side, and a phase change medium located between the heat-conducting layer 131 and the heat-insulating layer 132.

[0079] The following is an example of a possible implementation of the refrigeration system of this application.

[0080] The refrigeration system includes: a compressor 20 for compressing refrigerant; and a heat exchange assembly including a first heat exchanger 14 according to any of the above embodiments. The heat exchange assembly is connected to the compressor 20 and is used to adjust the temperature of the storage chamber of the refrigeration device 10. The refrigeration device 10 can be a vehicle refrigerator.

[0081] Specifically, the compressor 20 can compress a low-pressure, low-temperature gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The compressor 20 is connected to the heat exchange assembly via a pipeline. The heat exchange assembly is used to adjust the temperature using the refrigerant compressed by the compressor 20. Since the heat exchange assembly includes the first heat exchanger 14 of the refrigeration device 10 described in any of the above embodiments, the temperature of the housing 10 of the refrigeration device 10 can be adjusted through the heat exchange assembly. Furthermore, the refrigerant can be of types such as R134a, R410a, and R1234yf.

[0082] It should be noted that the compressor 20 can be a compressor separately installed in the refrigeration unit 10, or it can be a shared compressor in the thermal management system. In related technologies, when the refrigeration unit 10 and the thermal management system share the compressor 20, the required evaporation pressure of the first heat exchanger 14 decreases when the cooling demand is very low. However, reducing the evaporation pressure leads to increased energy consumption of the compressor 20, condensation in the pipeline, and increased costs. In this embodiment, when the refrigeration unit 10 uses a shared compressor in the thermal management system, the first heat exchanger 14 is installed on the housing 10. With the refrigeration module 12, the first heat exchanger 14 can cool the cavity inside the housing 10 through the refrigeration module 12 to obtain a cooling temperature lower than the evaporation temperature, thereby improving the cooling effect of the refrigeration device 10. At the same time, by setting a cold storage module 13 on the first heat exchanger 14, the cold storage module 13 can absorb and store the unutilized cold energy in the first heat exchanger 14. When the cooling demand is not high or in the power outage mode, the cold energy stored in the cold storage module 13 can be used to cool or insulate the housing 10 without turning on the compressor 20, thereby saving energy consumption of the thermal management system.

[0083] In an optional embodiment, the refrigeration system of this application includes a compressor, an air conditioning unit, and the aforementioned refrigeration device 10. The compressor is connected to both the air conditioning unit and the first heat exchanger 14. The refrigerant pumped by the compressor can be used by the air conditioning unit to cool and / or heat the interior space of the vehicle cabin, etc., and the refrigerant pumped by the compressor can also be used by the refrigeration device 10 to cool the interior space of the cavity, thereby optimizing and expanding the performance of the refrigeration system. The air conditioning unit and the refrigeration device 10 can be configured to be connected in parallel with the compressor.

[0084] Optionally, the heat exchange assembly further includes a condenser 210, and the thermal management system further includes a first expansion valve 22; the outlet end of the compressor 20 is connected to one end of the condenser 210, the other end of the condenser 210 is connected to one end of the first expansion valve 22, the other end of the first expansion valve 22 is connected to one end of the first heat exchanger 14, and the other end of the first heat exchanger 14 is connected to the outlet end and the inlet end of the compressor 20; wherein, the first expansion valve 22 is used to regulate the flow rate of the refrigerant between the condenser 210 and the first heat exchanger 14.

[0085] like Figure 3As shown, the outlet end of compressor 20, condenser 210, first expansion valve 22, first heat exchanger 14, and inlet end of compressor 20 are sequentially connected by pipelines. The outlet end of compressor 20 is also connected to the other end of first heat exchanger 14 via a pipeline. Condenser 210 cools and condenses the high-temperature, high-pressure gaseous refrigerant from compressor 20 into a saturated liquid refrigerant. First expansion valve 22 throttles and reduces the pressure of the liquid refrigerant and regulates the refrigerant flow rate between condenser 210 and first heat exchanger 14. Furthermore, first expansion valve 22 can be an electronic expansion valve.

[0086] Furthermore, the thermal management system also includes a first solenoid valve 23; the first solenoid valve 23 is connected between the outlet end of the compressor 20 and the first heat exchanger 14; wherein, the first solenoid valve 23 has a first open state and a first closed state. In the first open state, the outlet end of the compressor 20 is connected to the first heat exchanger 14 to increase the temperature of the housing 10. In the first closed state, the outlet end of the compressor 20 is sequentially connected to the condenser 210 and the first heat exchanger 14 to decrease the temperature of the housing 10.

[0087] When the refrigeration device 10 operates in heating mode, the first solenoid valve 23 is in the first open state, and the outlet end of the compressor 20 is connected to the first heat exchanger 14. At this time, the first heat exchanger 14 is in condenser mode. The refrigerant in the compressor 20 flows from the outlet end through the first heat exchanger 14 and the first expansion valve 22 into the inlet end of the compressor 20. The refrigerant releases heat to the items inside the box 10 in the first heat exchanger 14 and becomes a saturated liquid, thereby increasing the temperature of the box 10. When the refrigeration device 10 operates in cooling mode, the first solenoid valve 23 is in the first closed state, and the outlet end of the compressor 20 is connected to the condenser 210 and the first heat exchanger 14 in sequence. At this time, the first heat exchanger 14 is in evaporator mode. The refrigerant in the compressor 20 flows through the condenser 210, the first expansion valve 22, and the first heat exchanger 14 into the inlet end of the compressor 20. The refrigerant absorbs heat in the first heat exchanger 14 and vaporizes, carrying away the heat inside the box 10, thereby reducing the temperature of the box 10. In this way, by setting the first solenoid valve 23, the first solenoid valve 23 can quickly switch between the first open state and the first closed state, which allows the thermal management system to flexibly switch the working mode of the refrigeration device 10 according to actual needs, and ensures that the refrigeration device 10 can quickly switch between the refrigeration mode and the heating mode.

[0088] Optionally, the thermal management system further includes a first throttle valve 24, which is connected between the first expansion valve 22 and the first heat exchanger 14. The first throttle valve 24 is used to adjust the refrigerant flow between the first expansion valve 22 and the first heat exchanger 14.

[0089] like Figure 3 As shown, the first throttle valve 24 is installed on the pipeline between the first expansion valve 22 and the first heat exchanger 14. By adjusting the opening of the first throttle valve 24, the refrigerant flow rate between the first expansion valve 22 and the first heat exchanger 14 is adjusted. In the specific refrigeration process, the liquid refrigerant from the condenser 210 is depressurized and cooled by the first expansion valve 22, and then its flow rate is further regulated by the first throttle valve 24 before finally reaching the first heat exchanger 14 for heat exchange, thus achieving the refrigeration effect. In this embodiment, the combined use of the first expansion valve 22 and the first throttle valve 24 allows for more precise control of the refrigerant flow rate and pressure, which helps to achieve precise control of the evaporation temperature of the first heat exchanger 14 and avoids excessive temperature fluctuations in the casing 10.

[0090] Optionally, the heat exchange assembly further includes a second heat exchanger 211; the other end of the first expansion valve 22 is also connected to one end of the second heat exchanger 211, and the other end of the second heat exchanger 211 is connected to the outlet end and the inlet end of the compressor 20. The second heat exchanger 211 is used to adjust the temperature of the vehicle cabin.

[0091] Specifically, the other end of the first expansion valve 22 is connected to one end of the second heat exchanger 211 via a pipeline. The other end of the second heat exchanger 211 is connected to the outlet and inlet ends of the compressor 20 via two pipelines, respectively. In this case, the first expansion valve 22 is also used to adjust the refrigerant flow between the condenser 210 and the second heat exchanger 211. The second heat exchanger 211 can be installed in the vehicle cabin, exchanging heat with the vehicle cabin to heat or cool the cabin. In practical applications, by having the first heat exchanger 14 and the second heat exchanger 211 share a single compressor 20, compared to a refrigeration unit 10 with an independent compressor 20, the space of the refrigeration unit 10 is increased, waste heat emissions and noise in the cabin are reduced, and cabin comfort is improved.

[0092] Furthermore, the first throttle valve 24 is located between the first expansion valve 22, the first heat exchanger 14, and the second heat exchanger 211. In this way, the first expansion valve 22 can adjust the refrigerant flow between the condenser 210 and the first heat exchanger 14 and the second heat exchanger 211, and the first throttle valve 24 can adjust the flow between the first expansion valve 22 and the first heat exchanger 14. Through the combined use of the first throttle valve 24 and the second expansion valve 27, the flow and pressure of the refrigerant can be controlled more precisely, and the evaporation temperature of the first heat exchanger 14 and the second heat exchanger 211 can be accurately adjusted, avoiding excessive temperature fluctuations between the vehicle compartment and the refrigeration unit 10. Furthermore, by adjusting the opening of the first throttle valve 24, the flow rate of refrigerant entering the first heat exchanger 14 and the second heat exchanger 211 can be controlled, thus limiting the evaporation pressure and temperature of the refrigeration unit 10. This ensures that the evaporation pressure and temperature of the refrigeration unit 10 are consistent with those of the second heat exchanger 211, thereby increasing the evaporation pressure and temperature of the refrigeration unit 10 and reducing the risk of condensation in the pipes. Simultaneously, the increased evaporation temperature of the refrigeration unit 10 can reduce the thickness of its insulation layer, increasing the effective volume of the refrigerator. In addition, the increased evaporation pressure allows for a lower pressure ratio in the compressor 20, reducing energy consumption and mitigating the risk of overheating of critical components such as the IGBT module in the low-speed compressor 20 under high ambient temperatures.

[0093] Optionally, the thermal management system further includes a second solenoid valve 25, which is connected between the second heat exchanger 211 and the inlet end of the compressor 20. The second solenoid valve 25 is used to control the on / off connection between the second heat exchanger 211 and the compressor 20. In practical applications, by setting the second solenoid valve 25 between the inlet end of the compressor 20 and the second heat exchanger 211, the on / off connection between the second heat exchanger 211 and the compressor 20 can be controlled. The evaporation pressure of the second heat exchanger 211 can be controlled jointly by the first expansion valve 22 and the second solenoid valve 25, achieving independent control of the evaporation pressure of the second heat exchanger 211. This avoids the impact on the evaporation temperature of the second heat exchanger 211 when multiple branches are operating. In addition, using the second solenoid valve 25 for direct control can also reduce the cost of the thermal management system.

[0094] Optionally, the thermal management system further includes a third solenoid valve 26, which is connected between the compressor 20 and the second heat exchanger 211. The third solenoid valve 26 has a second open state and a second closed state. In the second open state, the outlet end of the compressor 20 is connected to the second heat exchanger 211 to increase the temperature of the vehicle compartment. In the second closed state, the outlet end of the compressor 20, the condenser 210, and the second heat exchanger 211 are connected in sequence to decrease the temperature of the vehicle compartment.

[0095] Specifically, the third solenoid valve 26 can be installed on the pipeline between the outlet end of the compressor 20 and the second heat exchanger 211, or on the pipeline between the second heat exchanger 211 and the inlet end of the compressor 20. The thermal management system also includes a fifth solenoid valve 30, which is installed on the pipeline between the condenser 210 and the first expansion valve 22. The fifth solenoid valve 30 has an open state and a closed state. When the fifth solenoid valve 30 is in the open state, the condenser 210 is connected to the first expansion valve 22. When the fifth solenoid valve 30 is in the closed state, the condenser 210 and the first expansion valve 22 are not connected. The thermal management system also has a heating mode and a cooling mode. The second heat exchanger 211 also has two operating modes, namely evaporator mode and condenser mode. The switching between the heating mode and the cooling mode of the thermal management system is achieved through the cooperation of the third solenoid valve 26 and the fifth solenoid valve 30.

[0096] Specifically, in heating mode, the third solenoid valve 26 is in the second open state, and the fifth solenoid valve 30 is in the closed state. At this time, the second heat exchanger 211 operates as a condenser. The refrigerant in the compressor 20 flows from the outlet end through the second heat exchanger 211 and the first expansion valve 22 before flowing into the inlet end of the compressor 20. The refrigerant releases heat into the passenger compartment through the second heat exchanger 211, becoming a saturated liquid to increase the temperature of the passenger compartment. In cooling mode, the third solenoid valve 26 is in the second closed state, and the fifth solenoid valve 30 is in the open state. At this time, the second heat exchanger 211 operates as an evaporator. The refrigerant in the compressor 20 flows from the outlet end through the condenser 210, the first expansion valve 22, and the second heat exchanger 211 before flowing into the inlet end of the compressor 20. The refrigerant absorbs heat in the second heat exchanger 211 and vaporizes, carrying away heat from the passenger compartment to lower the temperature of the passenger compartment. In this way, by setting the third solenoid valve 26 and the fifth solenoid valve 30 to work together, the third solenoid valve 26 and the fifth solenoid valve 30 can quickly switch between corresponding open and closed states, which allows the thermal management system to flexibly switch the working mode of thermal management according to actual needs, and ensures that the thermal management system can quickly switch between cooling mode and heating mode.

[0097] It should be noted that the first solenoid valve 23 described in the aforementioned embodiment can also cooperate with the fifth solenoid valve 30 to switch between the refrigerator's cooling mode and heating mode. The specific cooperation method is similar to that described above and will not be repeated here.

[0098] Optionally, the heat exchange assembly further includes a third heat exchanger 212, and the thermal management system further includes a second expansion valve 27. The other end of the condenser 210 is connected to one end of the second expansion valve 27, and the other end of the second expansion valve 27 is connected to one end of the third heat exchanger 212. The other end of the third heat exchanger 212 is connected to the outlet and inlet ends of the compressor 20. The third heat exchanger 212 is used to adjust the temperature of the battery pack in the vehicle, and the second expansion valve 27 is used to adjust the refrigerant flow between the condenser 210 and the third heat exchanger 212. Specifically, the third heat exchanger 212 can be a battery cold plate, which is disposed on the battery pack and used to adjust the temperature of the battery pack. In practical applications, by connecting the third heat exchanger 212 to the second expansion valve 27 and the condenser 210, the third heat exchanger 212 can achieve heat exchange with the battery through the compressor 20, condenser 210, and other structures in the thermal management system, further reducing the cost of the thermal management system.

[0099] Optionally, the thermal management system further includes a second throttle valve 28, which is connected between the third heat exchanger 212 and the inlet end of the compressor 20. The second throttle valve 28 is used to adjust the refrigerant flow rate between the third heat exchanger 212 and the compressor 20. In practical applications, the refrigerant flow rate between the third heat exchanger 212 and the compressor 20 can be adjusted by changing the opening of the second throttle valve 28. Furthermore, the evaporation pressure of the second heat exchanger 211 can be controlled jointly by the second expansion valve 27 and the second throttle valve 28, achieving independent control of the evaporation pressure of the third heat exchanger 212 and avoiding the impact on the evaporation temperature of the third heat exchanger 212 when multiple branches are operating.

[0100] Optionally, the thermal management system further includes a fourth solenoid valve 29, which is connected between the outlet end of the compressor 20 and the third heat exchanger 212. The fourth solenoid valve 29 has a third open state and a third closed state. In the third open state, the outlet end of the compressor 20 is connected to the third heat exchanger 212 to increase the temperature of the battery assembly. In the third closed state, the outlet end of the compressor 20, the condenser 210, and the third heat exchanger 212 are connected in sequence to decrease the temperature of the battery assembly.

[0101] Specifically, the fourth solenoid valve 29 is located on the pipeline between the outlet end of the compressor 20 and the third heat exchanger 212. The third heat exchanger 212 has evaporator mode and condenser mode. When the thermal management system is in heating mode, the fourth solenoid valve 29 is in the third open state. At this time, the third heat exchanger 212 is in condenser mode. The refrigerant in the compressor 20 flows from the outlet end through the third heat exchanger 212 and the second expansion valve 27 in sequence into the inlet end of the compressor 20. The refrigerant releases heat to the battery pack in the third heat exchanger 212 and becomes saturated liquid, thereby increasing the temperature of the battery pack. When the thermal management system is in cooling mode, the fourth solenoid valve 29 is in the third closed state. At this time, the second heat exchanger 211 is in evaporator mode. The refrigerant in the compressor 20 flows from the outlet end through the condenser 210, the second expansion valve 27 and the third heat exchanger 212 in sequence into the inlet end of the compressor 20. The refrigerant absorbs heat in the third heat exchanger 212 and vaporizes, carrying away heat from the battery pack, thereby reducing the temperature of the battery pack. In this way, by setting the fourth solenoid valve 29, the fourth solenoid valve 29 can quickly switch between the third open state and the third closed state, which allows the thermal management system to flexibly switch the working mode of the thermal management system according to actual needs, and ensures that the thermal management system can quickly switch between cooling mode and heating mode.

[0102] It should be noted that the fourth solenoid valve 29 described in this embodiment can also cooperate with the fifth solenoid valve 30 described in the previous embodiment to achieve switching between cooling mode and heating mode. The specific cooperation method is similar to that described above and will not be repeated here.

[0103] It should be noted that, for the sake of simplicity in the accompanying drawings, Figure 3 The thermal management integrated module 31 shown refers to the integration of some flow channels and control valves in the thermal management system body into the same module to form the thermal management integrated module 31. The specific flow channel settings and control valve settings in the thermal management integrated module 31 can be specifically set according to actual needs. This application embodiment does not make specific settings in this regard.

[0104] This invention relates to a shared compressor-based vehicle-mounted refrigerator thermal management system for new energy electric vehicles, featuring segmented refrigeration. It includes: a compressor, a condenser (e.g., an external condenser), a front air conditioning unit, a thermal management integrated module, a battery pack, a refrigeration unit 10 (which can be a refrigerator), multiple electronic expansion valves, and multiple solenoid valves, etc.

[0105] In addition, the present invention also provides a control method for a refrigeration system.

[0106] like Figure 4 According to an embodiment of the present invention, a control method is used in the aforementioned refrigeration system, and the control method includes:

[0107] S101: The refrigeration device 10 is operating in the first operating state, and both the refrigeration module 12 and the first heat exchanger are in working state.

[0108] For example, when the refrigeration device 10 is determined to be in energy-saving mode, the refrigeration device 10 can be controlled to operate in the first operating state, the refrigeration module 12 can be controlled to be driven by a preset current, the compressor can be controlled to operate, and the heat at the hot end of the refrigeration module 12 can be removed by the first heat exchanger 14.

[0109] Optionally, the preset current can be the operating current at which the refrigeration module 12 operates most efficiently. By supplying the preset current to the refrigeration module 12, its efficient operation can be maintained, achieving a high level of cooling capacity and energy consumption. This enables rapid cooling of the storage cavity. Furthermore, the compressor operation utilizes the first heat exchanger 14 to remove heat from the hot end of the refrigeration module 12, achieving heat dissipation from the thermal refrigeration module 12. Simultaneously, the first heat exchanger 14 can also exchange heat with the cold storage module 13, allowing a portion of the cooling capacity supplied by the first heat exchanger 14 to be stored in the cold storage module 13.

[0110] S102: Determine whether the cold storage module has completed cold storage.

[0111] For example, it can be determined whether the cold storage module has completed cold storage by judging whether the temperature of the cold storage module is lower than the first temperature threshold.

[0112] S103. If so, control the refrigeration device 10 to operate in the second operating state;

[0113] For example, the compressor can be shut down or the first heat exchanger 14 can be disconnected when the cold storage module 13 completes cold storage.

[0114] Once the cold storage module 13 has completed its cold storage, it can exchange heat with the refrigeration module 12 to dissipate heat from the hot end of the refrigeration module 12, thus maintaining its efficient operation. At this point, the first heat exchanger 14 can be shut down, and the cold storage module 13 can be used for heat dissipation. This can be achieved by turning off the compressor to shut down the first heat exchanger 14, or by disconnecting the heat exchanger, for example, by switching the refrigerant passage between the compressor and the first heat exchanger 14. Through this configuration, after the cold storage module 13 has completed its cold storage, it can dissipate heat from the hot end of the refrigeration module 12. At this time, the compressor can be shut down or the passage between the compressor and the first heat exchanger 14 can be closed, thereby reducing the energy consumption of the refrigeration system and achieving energy saving.

[0115] According to the control method of the present invention, after the cold storage module 13 completes cold storage, it can be used to dissipate heat from the hot end of the refrigeration module 12, thereby reducing the energy consumption of the refrigeration system by turning off the compressor or disconnecting the first heat exchanger 14, which can facilitate the improvement of the energy efficiency of the refrigeration system and meet the requirements of energy conservation and environmental protection.

[0116] like Figure 4 In some optional embodiments, the control method further includes: S104, determining whether the temperature inside the storage cavity is lower than a second temperature threshold; S105, if so, controlling the cooling module 12 to stop working.

[0117] After the compressor is shut down, if the internal temperature or the temperature of the items in the storage cavity is less than or equal to the second temperature threshold, the refrigeration module 12 is powered off or driven at a low current. Once the internal temperature of the storage cavity reaches the preset temperature, the refrigeration module 12 can be used to maintain the temperature inside the storage cavity, thus maintaining the low temperature of the stored items and further reducing the energy consumption of the refrigeration system, thereby improving its energy efficiency and energy-saving performance. Specifically, when the refrigeration module 12 is powered off, it will no longer perform refrigeration; the inner liner 11 and the cold storage medium can be used to insulate and maintain the temperature of the storage cavity. When the refrigeration module 12 is driven at a low current, the inner liner 11 and the cold storage medium can be used to insulate and maintain the temperature of the storage cavity, and the refrigeration module 12 operates at a lower power, which also serves to maintain and insulate the temperature. The aforementioned low current drive means that the operating current of the refrigeration module 12 is set to be less than or equal to 50% of the rated current value of the refrigeration module 12. The internal temperature value refers to the temperature value of the space inside the storage cavity, and the item temperature value refers to the temperature value of the item stored in the storage cavity.

[0118] like Figure 4 In some embodiments, the control method further includes: 106. After the compressor is turned off, if the temperature value of the inner cavity or the temperature value of the item in the storage cavity is greater than the set temperature value, then when the temperature value of the medium in the cold storage module 13 and / or the temperature value of the pipe wall of the first heat exchanger 14 are greater than the upper limit temperature value, the compressor is controlled to run, and the heat from the hot end of the refrigeration module 12 is carried away by the first heat exchanger 14.

[0119] For example, the refrigeration device 10 may have a sensor that detects the temperature value of the inner cavity of the storage chamber. After the compressor is turned off, if the temperature value of the inner cavity of the storage chamber is greater than the set temperature value, the compressor is controlled to run when the temperature value of the medium in the cold storage module 13 is greater than the upper limit temperature value, and the heat of the hot end of the refrigeration module 12 is carried away by the first heat exchanger 14.

[0120] For example, the refrigeration device 10 may have a sensor that detects the temperature of the items stored in the storage cavity. After the compressor is turned off, if the temperature of the items stored in the storage cavity is greater than the set temperature, the compressor is controlled to run, and the heat from the hot end of the refrigeration module 12 is carried away by the first heat exchanger 14.

[0121] For example, the working state of the refrigeration system can be controlled by detecting the pipe wall temperature of the first heat exchanger 14. After the compressor is turned off, the compressor is controlled to run when the pipe wall temperature of the first heat exchanger 14 is greater than the upper limit temperature value, so that the first heat exchanger 14 can carry away the heat from the hot end of the refrigeration module 12.

[0122] With the above configuration, when the cold storage module 13 in the refrigeration system is unable to meet the heat dissipation requirements of the refrigeration module 12, the first heat exchanger 14 can be turned on to supply heat to the cold storage module 13. The first heat exchanger 14 can also be used to dissipate heat from the refrigeration module 12, so as to improve the energy efficiency of the refrigeration module 12.

[0123] In addition, after the compressor is turned off, if the temperature value of the inner cavity of the storage chamber or the temperature value of the item is less than or equal to the set temperature value, the refrigeration module 12 is controlled to enter the temperature maintenance and insulation mode.

[0124] After the compressor is turned off, if the temperature value of the inner cavity of the storage chamber or the temperature value of the item is less than or equal to the set temperature value, the compressor is kept off or the first heat exchanger 14 is disconnected.

[0125] In addition, in some embodiments of the present invention, the refrigeration device 10 is determined to enter a non-energy-saving mode, the refrigeration module 12 is controlled to be driven with the maximum current, and the refrigeration module 12 is controlled to be powered off or driven with low current when the temperature value of the inner cavity of the storage cavity or the temperature value of the item is less than or equal to the set temperature value.

[0126] like Figures 1 to 4 This invention relates to an energy-saving control strategy for a multi-cold-source shared compressor vehicle-mounted refrigerator installed in a new energy electric vehicle. By adding an inner liner 11, a refrigeration module 12, and a cold storage module 13, the refrigeration device 10 can operate in multiple modes to meet different user needs. The specific solution is described below.

[0127] In this plan, such as Figure 4When the user has no need for rapid freezing, such as when the user sets the system to refrigeration or preservation mode, the refrigerant working pressure of the refrigeration unit 10 branch always operates according to the common working pressure of the air conditioning system. The phase change temperature (phase change temperature - subcooling) of the phase change medium in the cold storage module 13 should be at least 5°C higher than the refrigerant temperature in the evaporator. When the user sets an energy-saving mode or the vehicle determines that the battery level is low, the refrigeration module 12 can be driven in the high-efficiency current range. The heat generated at the hot end of the refrigeration module 12 is carried away by the refrigerant in the evaporator. During the cooling process of the refrigeration unit 10, the cold storage medium also releases heat at the same time, and the temperature continues to decrease. When the temperature of the cold storage medium reaches below (phase change temperature - subcooling temperature), the compressor can be turned off. After the compressor is turned off, the refrigeration unit 10 continues to operate. At this time, the cold source for cooling the heat load at the hot end of the refrigeration module 12 is the cold energy stored in the phase change medium. Then, it is determined whether the air or items inside the refrigeration unit 10 have reached the set temperature. If the set temperature has been reached, the refrigeration module 12 is turned off and enters the heat preservation or temperature maintenance mode. If the air or items inside the refrigeration unit 10 do not reach the set temperature, the temperature of the phase change medium or the wall temperature of the first heat exchanger 14 needs to be determined. If the temperature of the phase change medium is higher than the phase change point or the wall temperature of the first heat exchanger 14 is significantly higher than the set temperature, the compressor needs to be restarted and the system will cycle in the aforementioned manner. If the user is not using the energy-saving mode or the vehicle has sufficient battery power, the refrigeration unit 10 can operate at maximum current. Once the temperature reaches the user-set temperature, it will enter the temperature maintenance or insulation mode.

[0128] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0129] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0130] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0131] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0133] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A refrigeration device, characterized in that, include: The inner liner has a storage cavity; A refrigeration module is disposed in the inner liner, the refrigeration module having a cold end and a hot end, the cold end being configured to exchange heat with the storage cavity; A cold storage module, wherein the cold storage module is configured to exchange heat with the hot end; The first heat exchanger is configured to exchange heat with the cold storage module.

2. The refrigeration device according to claim 1, characterized in that, The cold storage module is configured to absorb and store the cold energy of the first heat exchanger when the refrigeration device is in a first operating state, and the cold storage module is further configured to release the cold energy to the hot end and / or the storage cavity when the refrigeration device is in a second operating state.

3. The refrigeration device according to claim 2, characterized in that, In the first operating state, the first heat exchanger is in a refrigerant-flowing state; in the second operating state, the first heat exchanger is in a non-refrigerant-flowing state; or The first heat exchanger is connected to the compressor. In the first operating state, the compressor is in a working state, and in the second operating state, the compressor is in a stopped working state.

4. The refrigeration device according to claim 2 or 3, characterized in that, When the operating parameters of the refrigeration device meet the first condition, the refrigeration device is configured to operate in a second operating state; The first condition includes at least one of the following: the cold storage module completes cold storage, the temperature of the cold storage module is less than or equal to a first temperature threshold, and the temperature inside the storage cavity is lower than a second temperature threshold.

5. The refrigeration device according to claim 4, characterized in that, The cold storage module includes phase change materials.

6. The refrigeration device according to claim 5, characterized in that, The first temperature threshold is determined based on the phase change temperature and supercooling of the phase change material.

7. The refrigeration device according to claim 4, characterized in that, When the operating parameters of the refrigeration device meet the second condition, the refrigeration device is configured to operate in a first operating state, the second condition including: the temperature of the cold storage module or the storage cavity is greater than or equal to a third temperature threshold.

8. The refrigeration device according to claim 7, characterized in that, The second temperature threshold is determined based on the phase change temperature of the phase change material in the cold storage module.

9. The refrigeration apparatus according to any one of claims 2-8, characterized in that, When the temperature inside the storage cavity is lower than the fourth temperature threshold, the refrigeration device operates in the second operating state and the refrigeration module stops working or operates at low power.

10. The refrigeration apparatus according to any one of claims 2-9, characterized in that, The refrigeration device includes a normal operating mode and an energy-saving operating mode, and the second operating state operates in the energy-saving operating mode.

11. The refrigeration device according to claim 10, characterized in that, When the vehicle's operating status meets the energy-saving conditions, it enters the energy-saving working mode. The energy-saving conditions include at least one of the following: the battery charge is lower than a set value, the ambient temperature is lower than a set ambient temperature threshold, and an energy-saving signal is received.

12. The refrigeration apparatus according to claim 10 or 11, characterized in that, In the normal operating mode, the refrigeration module operates at rated power or maximum power.

13. The refrigeration apparatus according to any one of claims 1-12, characterized in that, The cooling module includes a semiconductor cooling chip.

14. The refrigeration apparatus according to any one of claims 1-13, characterized in that, The refrigeration device is a vehicle-mounted refrigerator.

15. The refrigeration apparatus according to any one of claims 1-14, characterized in that, The cold storage module and the storage cavity are located on both sides of the first heat exchanger, respectively.

16. The refrigeration apparatus according to any one of claims 1-15, characterized in that, The cold storage module includes a heat-conducting layer and a heat-insulating layer. The heat-conducting layer is in heat exchange cooperation with the first heat exchanger and the refrigeration module, respectively. The heat-insulating layer is located on the side of the heat-conducting layer away from the first heat exchanger and the refrigeration module.

17. The refrigeration apparatus according to any one of claims 1-16, characterized in that, The first heat exchanger is located on the outside of the inner liner, and at least a portion of the refrigeration module is located on the side of the first heat exchanger near the inner liner.

18. The refrigeration apparatus according to claim 17, characterized in that, The first heat exchanger is arranged around the inner liner, and the refrigeration module is located inside the first heat exchanger.

19. A refrigeration system, characterized in that, It includes a compressor, an air conditioning unit, and a refrigeration device according to any one of claims 1-18, wherein the compressor is connected to the air conditioning unit and the first heat exchanger respectively.

20. A vehicle comprising a refrigeration device according to any one of claims 1-18 or comprising a refrigeration system according to claim 19.

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