Constant-temperature square cabin

Abstract

The utility model relates to a constant temperature square cabin which comprises a box body, a cabin door and a refrigerating device, a storage cavity and a module cavity which are separated are arranged in the box body, the cabin door is connected with the box body to open or close the storage cavity, the refrigerating device comprises a fan and an evaporator, and a circulating air duct communicated with the storage cavity is arranged in the box body. The fan is used for driving airflow in the circulating air duct to pass through the evaporator and enter the storage cavity; a boss is arranged at the top of the storage cavity, when the cabin door is closed relative to the box body, an interval space exists between the boss and the cabin door, and an air outlet capable of communicating with the interval space is formed in the side wall, facing the cabin door, of the boss. According to the constant-temperature square cabin provided by the invention, stable operation of the refrigerating system of the square cabin can be ensured, so that the constant temperature of the square cabin can be kept in the transportation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold chain transportation technical field especially relates to a constant temperature square cabin. BACKGROUND

[0002] Cold chain transportation refers to the whole process of transportation, whether it is loading and unloading, changing the mode of transportation, replacing the packaging equipment and other links, so that the transported goods always maintain a certain temperature. Cold chain transportation can be highway transportation, waterway transportation, railway transportation, air transportation, or a comprehensive transportation mode composed of multiple transportation modes. As an important part of cold chain logistics, cold chain transportation requires complex mobile refrigeration technology and insulation box manufacturing technology. The constant temperature square cabin can store special low-temperature required goods, such as medicines, vaccines, reagents, blood and other medical drugs. Therefore, a refrigeration system that can operate stably to keep the cabin at a constant temperature during transportation is a technical problem that needs to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0003] Therefore, it is necessary to provide a constant temperature square cabin to ensure that the refrigeration system of the cabin can operate stably, thereby helping to keep the cabin at a constant temperature during transportation.

[0004] A constant temperature square cabin, comprising a box body, a cabin door and a refrigeration device, a storage cavity and a module cavity are separated in the box body, the cabin door is connected with the box body to open or close the storage cavity, the refrigeration device comprises a fan and an evaporator, a circulating air duct is provided in the box body and communicates with the storage cavity, the fan is used to drive the airflow in the circulating air duct to pass through the evaporator and enter the storage cavity; a boss is arranged at the top of the storage cavity, when the cabin door is closed relative to the box body, the boss and the cabin door have a spacing space, and the side wall of the boss facing the cabin door is provided with an air outlet capable of communicating with the spacing space.

[0005] In the constant temperature square cabin provided in the present application, the air entering the circulating air duct passes through the fan, and the circulating air duct blows out cold air under the cooling effect of the evaporator. The cold air blows out from the air outlet, moves downward through the spacing space, and enters the storage cavity to regulate the temperature in the storage cavity. This process can ensure that the refrigeration system of the cabin operates stably, thereby helping to keep the cabin at a constant temperature during transportation.

[0006] In one embodiment, the constant-temperature shelter further comprises a first temperature sensor for detecting the temperature in the module cavity, a control module electrically connected with the first temperature sensor, and a vane movably connected to the side wall of the boss facing the door and used for adjusting the opening of the air outlet, the control module being configured to drive the vane to increase the opening of the air outlet when the detection value of the first temperature sensor is greater than a first preset value, and to drive the vane to decrease the opening of the air outlet when the detection value of the first temperature sensor is less than a second preset value.

[0007] In one embodiment, the vane is slidingly connected with the boss and can be driven to move relative to the boss to expose at least part of the air outlet or close the air outlet, or the vane is rotatably connected with the boss and can be driven to rotate to change the opening angle between the vane and the boss.

[0008] In one embodiment, the air outlet comprises a plurality of air outlet units, the control module being configured to drive the vane to reduce the number of the air outlet units closed by the vane and / or increase the opening of at least one of the air outlet units when the detection value of the first temperature sensor is greater than the first preset value, and to drive the vane to increase the number of the air outlet units closed by the vane and / or decrease the opening of at least one of the air outlet units when the detection value of the first temperature sensor is less than the second preset value.

[0009] In one embodiment, the constant-temperature shelter further comprises a cooling device and a control module, the cooling device further comprising a condenser, a compressor and a second temperature sensor for detecting the temperature of the cooling device, the condenser, the compressor and the evaporator being connected in sequence by a conduit, the condenser and the compressor being arranged in the module cavity, the cooling device comprising a water tank and a water sprayer arranged in the module cavity, the water tank being in communication with the water sprayer and used for supplying water to the water sprayer, the control module being electrically connected with the second temperature sensor, the control module being configured to drive the water sprayer to spray water on at least one of the condenser, the compressor and the evaporator when the detection value of the second temperature sensor is greater than a third preset value.

[0010] In one embodiment, the module cavity is arranged around the periphery of the storage cavity.

[0011] In one embodiment, the condenser and the water tank are arranged on the side of the module cavity away from the storage cavity.

[0012] In one embodiment, the cabin door is provided with a hook, the hook is rotationally connected with the cabin door, the box is provided with a mounting groove, and the hook is locked into the mounting groove when the cabin door is closed relative to the box.

[0013] In one embodiment, the bottom of the box is provided with a hydraulic lifting device and a pulley, the hydraulic lifting device is capable of switching between an unfolded state and a folded state, and the hydraulic lifting device is capable of lifting the box to make the pulley disengage from a support surface when the hydraulic lifting device is in the unfolded state.

[0014] In one embodiment, the bottom of the box is provided with at least two rows of parallel forklift openings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further explained in connection with the drawings and embodiments, in which:

[0016] Figure 1 The structure schematic view of the constant-temperature square cabin provided by one embodiment of the application;

[0017] Figure 2 The structure schematic view of the constant-temperature square cabin provided by one embodiment of the application;

[0018] Figure 3 The structure schematic view of the constant-temperature square cabin provided by one embodiment of the application;

[0019] Figure 4 The structure schematic view of the constant-temperature square cabin provided by one embodiment of the application;

[0020] Figure 5 The structure schematic view of the constant-temperature square cabin provided by one embodiment of the application;

[0021] Figure 6 The top view of the constant-temperature square cabin provided by one embodiment of the application;

[0022] Figure 7 The structure schematic view of the constant-temperature square cabin provided by one embodiment of the application;

[0023] Figure 8 The signal transmission schematic view of the constant-temperature square cabin provided by one embodiment of the application.

[0024] The constant-temperature square cabin 10; the box 20; the storage cavity 21; the boss 211; the module cavity 22; the circulating air duct 23; the air outlet 231; the blade 232; the hydraulic lifting device 24; the pulley 25; the forklift opening 26; the mounting groove 27; the cabin door 30; the hook 31; the fan 41; the evaporator 42; the condenser 43; the interval space 50; the water tank 61. DETAILED DESCRIPTION

[0025] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways beyond the specific details set forth herein without departing from the scope of the present application. It should be noted that the present application is not limited to the specific embodiments described herein and that the specific embodiments are presented for purposes of example and illustration only.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0028] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] Cold chain transportation refers to the transportation in which the transported goods are kept at a certain temperature in the whole transportation process, no matter in the links of loading and unloading, changing the transportation mode, replacing the packaging equipment, etc. The cold chain transportation mode can be highway transportation, waterway transportation, railway transportation, air transportation, or a comprehensive transportation mode composed of multiple transportation modes. As an important link of cold chain logistics, the cold chain transportation needs complex mobile refrigeration technology and insulation box manufacturing technology. The constant-temperature shelter can store medical products with special low-temperature requirements, such as medicines, vaccines, reagents, blood, etc. Therefore, a refrigeration system capable of stable operation to keep the shelter at a constant temperature during transportation is a technical problem to be solved by the technical personnel in the field at present.

[0030] Reference Figures 1-8 To solve the above problems, the embodiment of the present application provides a constant-temperature shelter 10, which comprises a box body 20, a shelter door 30, and a refrigeration device. The box body 20 is provided with a storage cavity 21 and a module cavity 22 separated from each other. The shelter door 30 is connected with the box body 20 to open or close the storage cavity 21. The refrigeration device comprises a fan 41 and an evaporator 42. The box body 20 is provided with a circulating air duct 23 communicating with the storage cavity 21. The fan 41 is used to drive the airflow in the circulating air duct 23 to pass through the evaporator 42 and enter the storage cavity 21. The top of the storage cavity 21 is provided with a boss 211. When the shelter door 30 is closed relative to the box body 20, the boss 211 and the shelter door 30 have a spacing space. The side wall of the boss 211 facing the shelter door 30 is provided with an air outlet 231 capable of communicating with the spacing space 50.

[0031] In the constant temperature shelter 10, the constant temperature shelter 10 comprises a box 20, a shelter door 30, a refrigeration device and a cooling device, the box 20 can adopt a heat preservation material combined with a steel structure, the box 20 can also adopt a full-closed plate structure of a compartment plate, and high-strength structural adhesive is used for bonding between the plates, so that the box 20 has good connection reliability and sealing and heat preservation performance. The box 20 is provided with a separated storage cavity 21 and a module cavity 22, the storage cavity 21 can be used for storing items with special low temperature requirements, for example, medical drugs such as medicines, vaccines, reagents and blood, the shelter door 30 is rotationally connected with the box 20, the storage cavity 21 can be opened or closed by rotating the shelter door 30, thereby realizing the taking of the items in the storage cavity 21. In some embodiments, the module cavity 22 is arranged on the side of the storage cavity 21, which can increase the space of the module cavity 22 and facilitate the position distribution of the refrigeration device and the cooling device. The refrigeration device can maintain a low temperature environment in the constant temperature shelter 10, and ensure the temperature and quality of the items in the storage cavity 21. Specifically, the refrigeration device comprises a fan and a condenser 43, a compressor and an evaporator 42 connected through a pipe, the liquid in the pipe mainly comprises a refrigerant and a coolant, the refrigerant is a working medium in the refrigeration system, which is used for realizing a refrigeration cycle, for example, the refrigerant can be freon, and the refrigerant can be selected from alkyl compounds. The coolant is used in an indirect cooling system, and the heat of the cooled object is transferred to the evaporating refrigerant, the coolant is usually a liquid, which remains stable in a physical state and does not change phase during heat transfer, for example, the coolant can be water, brine, propylene glycol, ethylene glycol and the like. By selecting a suitable coolant, the temperature control in the constant temperature shelter 10 can achieve the best effect, thereby ensuring the storage quality and safety of the items in the storage cavity 21.

[0032] In some embodiments, the condenser 43 and the compressor are arranged in the module cavity 22, the compressor is the core component of the refrigeration device, the compressor compresses the refrigerant to release heat and liquefy in the condenser 43, the condenser 43 is used to cool and liquefy the high-temperature and high-pressure refrigerant compressed by the compressor, and the condenser 43 is usually cooled by water cooling or air cooling, and the evaporator 42 is a place where the refrigerant vaporizes at low temperature and low pressure. The circulating air duct 23 is arranged in the box 20 and communicates with the storage cavity 21, and the circulating air duct 23 can blow out air with lower temperature, so that the temperature in the storage cavity 21 reaches the temperature required by the goods. Specifically, the fan and the evaporator 42 are arranged in the circulating air duct 23, the fan is used to drive the air flow in the circulating air duct 23 to pass through the evaporator 42, in this process, the air entering the circulating air duct 23 passes through the fan, and the circulating air duct 23 blows out cold air under the cooling effect of the evaporator 42, and the cold air blown out by the circulating air duct 23 enters the storage cavity 21 to regulate the temperature in the storage cavity 21. In some embodiments, the cooling device includes a water tank 61 in the module cavity 22 and a water sprayer, the water tank 61 communicates with the water sprayer through a water pipe, and the water outlet of the water sprayer faces the condenser 43. Spraying water on the condenser 43 can effectively reduce the temperature of the inner wall of the condenser pipe, reduce the internal pressure of the condenser 43, reduce the risk of high-pressure tripping, and improve the cleanliness of the condenser 43, so that dust is no longer accumulated, thereby increasing the heat dissipation effect of the condenser 43 and improving the stability and refrigeration effect of the entire system in a high-temperature environment. The above refrigeration process can ensure that the constant-temperature shelter 10 discharges heat of not more than 50℃, so as to avoid that the temperature is too high to affect other goods placed around the constant-temperature shelter 10 in the carriage or warehouse. Appropriate water spraying is beneficial to maintaining the low temperature of the condenser pipe, thereby accelerating the orderly condensation process to achieve the effect of cooling. The above process can ensure that the refrigeration system of the constant-temperature shelter 10 can stably operate through the cooperation of the refrigeration device and the cooling device, and the circulating air duct 23 is beneficial to regulating the temperature in the storage cavity 21, thereby helping to maintain the constant temperature of the constant-temperature shelter 10 during transportation. In some embodiments, the constant-temperature shelter further includes a control module, the refrigeration device further includes a second temperature sensor for detecting the temperature of the refrigeration device, the control module is electrically connected with the second temperature sensor, and the control module is configured to drive the water sprayer to spray water on at least one of the condenser 43, the compressor and the evaporator 42 when the detection value of the second temperature sensor is greater than a third preset value. In some embodiments, the condenser 43 and the water tank 61 are located on the side of the module cavity 22 away from the storage cavity 21, so that the components with pipeline connection or circuit connection are distributed compactly, the cooperation is facilitated, and the space is fully utilized.In the constant-temperature shelter 10, the wind entering the circulating air duct 23 passes through the fan 41 and is cooled by the evaporator 42, and then the cold air is blown out from the air outlet 231 and moves downward through the interval space 50 and enters the storage cavity 21 to regulate the temperature in the storage cavity 21. The cold air can fully enter the storage cavity 21, so that the temperature distribution in the storage cavity 21 is balanced, and the stable operation of the refrigeration system of the shelter is ensured, which helps to keep the temperature of the shelter constant during transportation.

[0033] Referring to Figures 1-8 In some embodiments, the constant-temperature shelter 10 further comprises a first temperature sensor, a control module and a vane 232. The first temperature sensor is used to detect the temperature in the module cavity 22, and the first temperature sensor is electrically connected with the control module. The vane 232 is movably connected to the side wall of the boss 211 facing the door 30 and is used to adjust the conduction of the air outlet 231. Specifically, the control module is configured to: when the detection value of the first temperature sensor is greater than a first preset value, the control module drives the vane 232 to move to increase the conduction of the air outlet 231; and when the detection value of the first temperature sensor is less than a second preset value, the control module drives the vane 232 to move to reduce the conduction of the air outlet 231. The conduction is the total amount of cold air discharged from the air outlet 231 through the circulating air duct 23 for cooling. Here, the conduction refers to the total conduction of all air outlets. In some embodiments, a power system is arranged in the module cavity 22, and the control module is electrically connected with the power system, the condenser 43, the compressor, the evaporator 42, the fan and the water sprayer to realize the process of electrically controlling the refrigeration.

[0034] Referring to Figures 1-8 In some embodiments, a wireless communication module is arranged in the module cavity 22, and the wireless communication module is electrically connected with the main controller. The wireless communication module refers to a device that sends or receives electromagnetic wave signals and converts them into electrical energy to control the refrigeration device. It is mainly used in the Internet of Things to realize information transmission between various terminal devices, so that intelligent devices have the information interface of the Internet of Things. Specifically, the wireless communication module can control the refrigeration device through a wireless way to realize remote monitoring and adjustment and improve the intelligent level of the device. The wireless communication module can be a WiFi (mobile hotspot) communication module, a Bluetooth communication module, etc. The wireless communication module has the functions of information transmission, remote control and intelligent management, and transmits the state information of the refrigeration device to the central control system for remote monitoring and management. The wireless communication module can remotely control the on-off, temperature adjustment and other functions of the refrigeration device through intelligent devices, and realizes the automatic management and fault warning of the device in combination with the Internet of Things technology. The wireless communication module can remotely realize the connection of the main controller, set the refrigeration temperature and the over-temperature warning. The refrigeration device adjusts the internal pressure of the storage cavity 21 through a one-way valve to maintain the stability of the system and improve the operation efficiency and reliability of the constant-temperature shelter 10.

[0035] Referring to Figure 2 and Figure 3In some embodiments, the circulating air duct 23 forms air outlets 231 on the wall of the storage cavity 21, which are used to discharge cold air to ensure that the items are uniformly cooled. The design and position of the air outlets 231 are crucial to the temperature control and item preservation inside the constant-temperature shelter 10. The air is cooled by the evaporator 42 and then discharged from the air outlets 231, at which time the air discharged from the air outlets 231 is cold air that can enter the storage cavity 21 to lower the temperature inside the storage cavity 21. In some embodiments, the air outlets 231 can be arranged in multiple sets at intervals to cool different positions in the storage cavity 21 and uniformly distribute the cooling air inside the constant-temperature shelter 10, thereby achieving uniformity of temperature control and ensuring that the items can be uniformly cooled, which is conducive to maintaining the constant temperature of the constant-temperature shelter 10 during transportation. In some embodiments, the air outlets 231 are provided with vanes 232 that are used to adjust the conductance of the air outlets 231. Specifically, the vanes 232 are in sliding connection with the bosses 211 and can be driven to move relative to the bosses 211 to expose at least part of the air outlets 231 or close the air outlets 231, or, in some embodiments, the vanes 232 are in rotational connection with the bosses 211 and can be driven to rotate to change the opening angle between the vanes 232 and the bosses 211, thereby adjusting the conductance of the air outlets 231. For example, when multiple air outlets 231 are provided, a vane 232 is arranged on each air outlet 231, and the vanes 232 are in rotational connection with the cavity wall of the storage cavity 21 and can be rotated relative to the storage cavity 21 to open or close the air outlets 231. For example, five air outlets 231 can be arranged at intervals, and the five air outlets 231 are all in communication with the storage cavity 21. When the wireless communication module feeds back that the temperature inside the storage cavity 21 is higher than the set temperature, the opening angle of the vanes 232 or the number of opened vanes 232 can be increased to adjust the conductance of the air outlets 231, thereby adjusting the temperature inside the storage cavity 21 of the constant-temperature shelter 10. In some embodiments, the air outlets 231 include multiple air outlet units. When the detection value of the first temperature sensor is greater than the first preset value, the control module drives the vanes 232 to move and reduces the number of air outlet units closed by the vanes 232 and / or increases the conductance of at least one air outlet unit. When the detection value of the first temperature sensor is less than the second preset value, the control module drives the vanes to move and increases the number of air outlet units closed by the vanes and / or reduces the conductance of at least one air outlet unit. In some embodiments, the air outlets 231 can be arranged in an elliptical structure, and multiple air outlets 231 are uniformly arranged along the wall of the storage cavity 21. When the constant-temperature shelter 10 is not in use, the vanes 232 can be closed to block the air outlets 231, which can prevent dust and other debris from entering the circulating air duct 23 to ensure the cooling effect of the constant-temperature shelter 10.In some embodiments, the positions and number of the air outlets 231 can be designed according to the specific structure and the arrangement of the items in the constant-temperature shelter 10 according to actual needs. The number of the air outlets 231 can be flexibly controlled, so that the temperature in the storage cavity 21 can be timely regulated and the temperature stability of the storage cavity 21 can be increased when the loading capacity of the storage cavity 21 is different. The air outlets 231 can be arranged at multiple positions of the constant-temperature shelter 10 to ensure that the cold air can be uniformly distributed to each corner of the constant-temperature shelter 10. The specific positions can include the top, side or bottom of the shelter, and the specific design depends on the structure and use requirements of the constant-temperature shelter 10.

[0036] Referring to Figure 1 , Figure 2 and Figure 3 In some embodiments, the top of the storage cavity 21 is provided with a boss 211, which can be used to open the air outlet 231. The boss 211 has a spacing space with the shelter door 30. The air outlet 231 is opened on the side wall of the boss 211 facing the shelter door 30. The air outlet 231 faces the spacing space. When the shelter door 30 is closed, the shelter door 30 still has a certain space with the boss 211. The spacing space can avoid the shelter door 30 from blocking the air outlet 231 when the shelter door 30 is closed, thereby affecting the cooling effect. In some embodiments, a second boss can also be arranged at the bottom of the storage cavity 21. The second boss is provided with the air outlet 231. The second boss has a spacing space with the shelter door 30. The air outlet 231 is opened on the side wall of the second boss facing the shelter door 30. The air outlet 231 faces the spacing space, thereby increasing the cooling effect on the constant-temperature shelter 10.

[0037] Referring to Figures 1-5In some embodiments, the cabin door is provided with a hook, the hook 31 is rotatably connected with the cabin door 30, the box body 20 is provided with a mounting groove 27, and when the cabin door 30 is closed relative to the box body 20, the hook 31 is locked into the mounting groove 27, so that the situation of the cabin door 30 being opened by mistake can be avoided. In some embodiments, the bottom of the box body 20 is provided with a hydraulic lifting device 24 and a pulley 25, the hydraulic lifting device 24 is driven by the pressure of hydraulic oil to realize the function of lifting, and the hydraulic lifting device 24 can be switched between an unfolded state and a folded state. Specifically, when the hydraulic lifting device 24 is in the unfolded state, the hydraulic lifting device 24 can support the box body 20 to make the pulley 25 separate from the supporting surface, so that the constant-temperature square cabin 10 is fixed and cannot move in the transport compartment or the warehouse. When the hydraulic lifting device 24 is in the folded state, the hydraulic lifting device 24 is folded to make the pulley 25 contact the supporting surface, so that the constant-temperature square cabin 10 can be moved in the process of transport and unloading. In some embodiments, when the box body 20 is a cuboid, one hydraulic lifting device 24 and one pulley 25 can be respectively arranged at four right angles of the bottom of the box body 20, the four hydraulic lifting devices 24 and the four pulleys 25 are symmetrically arranged and have the same size, so that the constant-temperature square cabin 10 is in a stable state when the constant-temperature square cabin 10 is transported or placed, and the stable transport of the articles in the storage cavity 21 can be ensured. In some embodiments, the bottom of the box body 20 is provided with at least two rows of parallel forklift openings 26, the forklift usually has a fork for taking articles, and the forklift openings 26 arranged at the bottom of the constant-temperature square cabin 10 can facilitate the forklift to load and unload the constant-temperature square cabin 10. The design of the forklift loading and unloading and the self-walking through the pulley 25 can be adapted to different transport vehicles, for example, the above structure can solve the problem that the tail plate vehicle cannot be easily loaded and unloaded because the tail plate cannot bear the weight of the forklift and the square cabin, and the forklift can still load and unload when the tail plate vehicle does not match the platform.

[0038] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the application patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the application patent should be subject to the appended claims.

Claims

1. A constant temperature shelter, characterized by, The device includes a housing, a door, and a refrigeration unit. The housing has spaced storage chambers and modular chambers. The door is connected to the housing to open or close the storage chambers. The refrigeration unit includes a fan and an evaporator. The housing has a circulating air duct that communicates with the storage chambers. The fan drives the airflow in the circulating air duct through the evaporator and into the storage chambers. The top of the storage chamber has a protrusion. When the door is closed relative to the housing, there is a gap between the protrusion and the door. The side wall of the protrusion facing the door has an air outlet that communicates with the gap. The constant temperature cabin also includes a cooling device and a control module. The cooling device further includes a condenser, a compressor, and a second temperature sensor. The second temperature sensor is used to detect the temperature of the cooling device. The condenser, the compressor, and the evaporator are connected in sequence via conduits. The condenser and the compressor are disposed in the module cavity. The cooling device includes a water tank and a water sprayer disposed in the module cavity. The water tank is connected to the water sprayer and is used to supply water to the water sprayer. The control module is electrically connected to the second temperature sensor. The control module is configured such that when the detected value of the second temperature sensor is greater than a third preset value, the control module drives the water sprayer to spray water onto at least one of the condenser, the compressor, and the evaporator.

2. The constant temperature shelter of claim 1, wherein, The constant temperature cabin also includes a first temperature sensor, a control module, and blades. The first temperature sensor is used to detect the temperature inside the module cavity and is electrically connected to the control module. The blades are movably connected to the side wall of the boss facing the cabin door and are used to adjust the conduction of the air outlet. The control module is configured to: when the detected value of the first temperature sensor is greater than a first preset value, drive the blades to move to increase the conduction of the air outlet; when the detected value of the first temperature sensor is less than a second preset value, drive the blades to move to decrease the conduction of the air outlet.

3. The constant temperature shelter of claim 2, wherein, The blade is slidably connected to the boss and can be driven to move relative to the boss to expose at least part of the air outlet or close the air outlet; or, the blade is rotatably connected to the boss and can be driven to rotate to change the opening angle between the blade and the boss.

4. The constant temperature shelter of claim 2, wherein, The air outlet includes multiple air outlet units. The control module is configured to: when the detection value of the first temperature sensor is greater than the first preset value, the control module drives the blades to move and reduces the number of air outlet units blocked by the blades, and / or increases the conduction of at least one air outlet unit; when the detection value of the first temperature sensor is less than the second preset value, the control module drives the blades to move and increases the number of air outlet units blocked by the blades, and / or decreases the conduction of at least one air outlet unit.

5. The constant temperature shelter of claim 1, wherein, The module cavity is arranged around the periphery of the storage cavity.

6. The constant temperature shelter of claim 1, wherein, The condenser and the water tank are located on the side of the module cavity opposite to the storage cavity.

7. The constant temperature shelter of claim 1, wherein, The cabin door is provided with a hook, the hook is rotationally connected with the cabin door, the box is provided with a mounting groove, and the hook is locked into the mounting groove when the cabin door is closed relative to the box.

8. The constant temperature shelter of claim 1, wherein, The bottom of the box is provided with a hydraulic lifting device and a pulley, the hydraulic lifting device can be switched between an unfolded state and a folded state, and the hydraulic lifting device can lift the box to make the pulley separate from a supporting surface when the hydraulic lifting device is in the unfolded state.

9. The constant temperature shelter of claim 1, wherein, The bottom of the box is provided with at least two rows of forklift openings which are parallel to each other.

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