Refrigerated container

Abstract

The utility model provides a refrigerated container, and relates to the technical field of cold chain transportation. The refrigerated container comprises a container body, a container door and a refrigerating unit. A storage space is formed in the box body, and one end of the box body is open; the box door is arranged at the opening end of the box body, the box door is of a light-proof structure, and when the box door closes the box body, the box body is sealed; the refrigerating unit is arranged at the end, opposite to the box door, of the box body. The refrigerator further comprises an inner layer door, the inner layer door is arranged at the open end and located on the inner side of the refrigerator door, the inner layer door can open or close the storage space, at least part of the structure of the inner layer door has light transmission performance, and the inner layer door is a non-sealing door and used for shielding the open end and enabling external light and air to enter the storage space when the refrigerator door is opened and the inner layer door is closed. The inner layer door is additionally arranged on the inner side of the box door, external light and air can be allowed to enter the box body, safety of operators is guaranteed, and meanwhile cold air loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold chain transportation, and in particular to a refrigerated container. BACKGROUND

[0002] As a key equipment of cold chain logistics, the refrigerated container is widely used in long-distance transportation and temporary storage of temperature-sensitive goods such as food and medicine. The refrigerated container maintains a low-temperature environment in the box through a refrigeration system to ensure stable quality of goods. The box door, as a passageway for loading and unloading goods and personnel, directly affects the overall use effect of the refrigerated container. In order to ensure the refrigeration effect of the refrigerated container, the box door is required to be airtight, light-tight and air-tight structure.

[0003] In the daily use of the refrigerated container, the staff often need to enter the box body to check and arrange goods. In this process, the box door needs to be kept open for personnel to enter and exit. However, when the box door is opened, the low-temperature environment in the box is directly connected with the normal temperature environment outside, resulting in a large amount of cold air escaping. This not only greatly increases the energy consumption of the refrigeration system and improves the operation cost, but also may affect the quality of goods due to temperature fluctuation in the box.

[0004] At present, the existing design and operation mode of the box door of the refrigerated container cannot effectively solve the problem of cold air escaping when the staff work inside. Due to the lack of optimized design of the box door for the personnel access and internal operation scene, it is difficult to reduce the loss of cold air while ensuring the safe access and continuous operation of personnel. CONTENT OF THE INVENTION

[0005] In view of at least one deficiency in the prior art, the present application provides a refrigerated container, which adds an inner door on the inner side of the box door, allowing external light and air to enter the box body, ensuring the safety of the workers, and reducing the loss of cold air.

[0006] The first aspect of the present application provides a refrigerated container, comprising:

[0007] a box body, which forms a storage space inside, and one end of the box body is open;

[0008] a box door, which is arranged at the open end of the box body, the box door is a light-tight structure, and when the box door closes the box body, the box body is sealed;

[0009] a refrigeration unit, which is arranged at the end of the box body opposite to the box door, and is used to provide cold air into the storage space;

[0010] an inner door, which is arranged at the open end and on the inner side of the box door, the inner door can open or close the storage space, at least part of the structure of the inner door has light transmission, and the inner door is a non-sealing door, which is used to block the open end and make external light and air enter the storage space when the box door is opened and the inner door is closed.

[0011] The refrigerated container provided by the application adds an inner layer door on the inner side of the box door, at least part of the structure of the inner layer door has light transmission and is a non-sealed door, when the box door is opened, external light and air enter the storage space, providing necessary light source and oxygen for the box operator, ensuring the safety of the operator; at the same time, the inner layer door blocks the opening end in the closed state, avoiding direct communication between the storage space and the outside, effectively reducing the loss of cold air, reducing the influence on the internal temperature of the storage space during the opening operation, improving the refrigeration effect, and reducing the energy efficiency.

[0012] In some embodiments, the inner layer door includes first and second door bodies arranged side by side, the first door body is normally closed, and the second door body is movable relative to the first door body; when the second door body is opened, a channel is formed for the operator to enter the storage space, and during the operation, the box door is opened and the second door body is closed.

[0013] In the above technical solution, the inner layer door includes first and second door bodies, the first door body is designed as a normally closed type, even if the second door body is opened, a part of the opening end is still in a shielding state, avoiding the significant reduction of cold air in the box due to the opening of the inner layer door as a whole, which is beneficial to maintain the stability of the temperature inside the storage space, so that the inner layer door simultaneously plays the roles of heat preservation and providing a channel.

[0014] In some embodiments, a rotating shaft is installed on the top of the box body corresponding to the position of the second door body, the second door body is a transparent roller shutter, and the second door body is wound around the outer periphery of the rotating shaft; when the rotating shaft rotates in a first direction, the second door body is wound up and the storage space is opened; when the rotating shaft rotates in a second direction, the second door body is unwound and the storage space is closed; the second direction is opposite to the first direction.

[0015] In the above technical solution, the second door body is designed as a transparent roller shutter and cooperates with the rotating shaft, realizing flexible opening and closing of the storage space. This design not only enables the operator to clearly observe the goods in the box through the transparent roller shutter without opening the door body, improving the operation efficiency and reducing the cold air flow; the roller shutter structure occupies a small space when stored, optimizing the utilization of the internal space of the box body, being easy and quick to operate, reducing the labor intensity of the operator, and improving the use convenience and practicality of the refrigerated container.

[0016] In some embodiments, the box body includes a bottom plate, the upper surface of the bottom plate is provided with a pressing plate, the pressing plate extends along the width direction of the opening end, and the pressing plate is used to press the lower end of the second door body on the bottom plate when the second door body is unwound and closes the storage space.

[0017] In the technical scheme, the lower end of the second door body is pressed on the bottom plate by the pressing plate, the opening state of the second door body is fixed by using the gravity of the pressing plate, and the reliability of the second door body in the closed state is ensured; meanwhile, the pressing plate is simple and practical in design and easy to operate, and when the second door body needs to be opened, the second door body can be rolled up by lifting the pressing plate.

[0018] In some embodiments, a reinforcing piece is arranged on the upper surface of the bottom plate, one side of the reinforcing piece is connected to the bottom plate, and the other side is connected to the pressing plate.

[0019] In the technical scheme, the pressing plate is fixed on the bottom plate of the box body by the reinforcing piece, so that the pressing plate is prevented from being separated from the bottom of the box body due to external force during use, the stability of the pressing plate is enhanced, and the lower end of the second door body can be reliably fixed by the pressing plate in the closed state.

[0020] In some embodiments, a handle is arranged on the upper surface of the pressing plate.

[0021] In the technical scheme, the handle can be used to apply force to the pressing plate, so that the pressing plate can be easily lifted or lowered by the operator, thereby quickly releasing or fixing the second door body, and the convenience of operation is improved.

[0022] In some embodiments, the air outlet of the refrigeration unit is located at the bottom of the storage space, and the air return is located at the upper part of the storage space; a wind channel is formed at the bottom of the storage space, the wind channel is in communication with the air outlet and extends towards the side of the inner door, and a ventilation opening in communication with the storage space is formed at the top of the wind channel; cold air enters the wind channel from the air outlet, flows to the opposite side of the refrigeration unit through the wind channel, and flows into the storage space from the ventilation opening; and the cold air in the storage space flows into the refrigeration device through the air return after heat exchange.

[0023] In the technical scheme, the air flow direction of the wind field is designed to be from the lower side to the upper side, and the bottom wind channel provides a channel for the cold air to flow from the refrigeration unit to the opposite side, ensuring the circulation of the cold air in the entire length range of the box body; the ventilation opening at the top of the wind channel enables the cold air to flow from the lower side to the upper side into the storage space, ensuring that the cold air is evenly distributed in the entire storage space and improving the refrigeration effect in the container.

[0024] In some embodiments, a wind deflector is arranged at the air outlet, the wind deflector extends from the air outlet to the end of the wind channel close to the air outlet; a baffle is arranged in the wind deflector, the baffle is located between the air outlet and the wind channel, and the angle of the baffle relative to the air outlet is adjustable.

[0025] In the above technical solution, the air deflector is arranged at the air outlet, which can guide the cold air to smoothly enter the air duct, realize the connection of the air outlet and the air duct, and ensure the cold air to flow from bottom to top; the air baffle is arranged between the air outlet and the air duct, and according to different refrigeration requirements, the angle of the air baffle is adjusted to cover the air outlet or open the air outlet to different degrees, so as to adjust the air volume and realize the required refrigeration effect, so that the refrigerated container can adapt to different cargo loading capacity and refrigeration requirements.

[0026] In some embodiments, the cabinet includes a bottom plate, a plurality of first air deflectors are arranged side by side on the bottom plate, the plate surface of the first air deflector is vertical, and extends from the refrigerating unit to the inner side of the inner door; a second air deflector is arranged at the top of each first air deflector, the plate surface of the second air deflector is horizontal and the two side edges respectively extend to the two sides of the first air deflector; an air duct is formed between adjacent first air deflectors, and a ventilation opening is formed between adjacent second air deflectors.

[0027] In the above technical solution, the structure of the air duct and the ventilation opening is realized by the design of the first air deflector and the second air deflector, a plurality of air ducts are formed at the bottom of the cabinet, and the cold air sent out by the air outlet is more evenly distributed to the entire cabinet interior, avoiding the accumulation or deficiency of cold air in local areas, and improving the uniformity of the temperature in the storage space.

[0028] The second aspect of the present application provides a refrigerated container, comprising:

[0029] A cabinet, which forms a storage space inside, and one end of the cabinet is open;

[0030] A cabinet door is arranged at the open end of the cabinet, the cabinet door is a light-tight structure, and when the cabinet door closes the cabinet, it seals the cabinet;

[0031] A refrigerating unit is arranged at the end of the cabinet opposite to the cabinet door, which is used to provide cold air into the storage space;

[0032] An inner door is arranged at the open end and inside the cabinet door, the inner door can open or close the storage space, the inner door blocks the open end in the closed state, and allows external light and air to pass through and enter the storage space.

[0033] The refrigerated container provided by the present application adds an inner door inside the cabinet door, which still allows external light and air to pass through and enter the storage space in the closed state, providing natural light and necessary oxygen for internal workers, and improving the working environment; since the inner door blocks the open end, it avoids direct communication between the storage space and the outside, effectively reduces the loss of cold air, and reduces the influence on the internal temperature of the storage space during the opening operation, to a certain extent, the refrigeration effect and the operation demand are considered. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 isometric view of a refrigerated container according to some embodiments of the present application;

[0035] Figure 2 front view of a refrigerated container according to some embodiments of the present application;

[0036] Figure 3 side view of a refrigerated container according to some embodiments of the present application;

[0037] Figure 4 top view of a refrigerated container according to some embodiments of the present application;

[0038] Figure 5 is a sectional view along the section line A-A; Figure 4

[0039] Figure 6 is a partial enlarged view of the second door body bottom; Figure 1

[0040] Figure 7 is a partial enlarged view of the middle part B; Figure 5

[0041] Figure 8 is a partial enlarged view of the air deflector part; Figure 5

[0042] Figure 9 is a schematic view of the cooperation of the refrigeration unit, the air deflector and the air duct according to embodiments of the present application;

[0043] Figure 10 Figure 9 is a partial enlarged view of the middle part C;

[0044] Figure 11 is a schematic view of the first air deflector and the second air deflector according to embodiments of the present application;

[0045] Figure 12 is a schematic view of the air baffle in the air deflector according to embodiments of the present application;

[0046] in the figure:

[0047] 10, box body; 11, storage space; 12, bottom plate; 20, box door; 30, refrigeration unit; 40, inner door; 41, first door body; 42, second door body; 43, rotating shaft; 51, pressing plate; 52, handle; 53, reinforcing piece; 61, air duct; 62, air vent; 71, first air deflector; 72, second air deflector; 80, air deflector; 90, air baffle. DETAILED DESCRIPTION

[0048] ​​​​​In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are terms of reference for indicating the orientation or positional relationship shown in the drawings, and are merely intended for facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0049] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like, should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0051] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present description, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present description and the features of the different embodiments or examples without contradiction.

[0052] In the following, the present application will be specifically described by exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can also be beneficially combined into other embodiments without further description.

[0053] Refrigerated containers, as core equipment in cold chain logistics, are widely used in the transportation and storage of goods where temperature control is strictly required. During operations, staff frequently need to enter the container to perform tasks such as cargo inspection and sorting. Because the doors of refrigerated containers are airtight and opaque, they must remain open during operations to ensure staff safety. When the doors are open, a large amount of low-temperature gas escapes from the container, causing the refrigeration system to continuously consume additional electrical energy to compensate for the loss of cold air, thus significantly increasing operating energy consumption and costs.

[0054] However, the current design and operation mode of refrigerated container doors have failed to effectively solve the problem of cold air escaping when personnel are working inside the container. They cannot effectively suppress cold air loss while ensuring the safe entry and exit of personnel and continuous operation, thus limiting the further improvement of the performance of refrigerated containers in terms of energy conservation, emission reduction and cargo quality assurance.

[0055] Based on this, this application proposes a refrigerated container that adds an inner door to the inside of the main door. This inner door is both light-transmitting and air-permeable, allowing external light and air to enter the container, providing necessary light and oxygen for personnel working inside, ensuring their safety. Simultaneously, the inner door blocks the opening of the container, effectively reducing the escape of cold air from the storage space, preventing significant loss of cold air, and improving the insulation performance and energy efficiency of the refrigerated container. Furthermore, when at least part of the inner door is designed to be transparent, in certain situations requiring inspection of the goods inside, it is not necessary to open the inner door; only the main door needs to be opened, and the goods can be directly observed through the light-transmitting portion of the inner door, facilitating convenient and quick cargo inspection.

[0056] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0057] like Figures 1-5 As shown, in some embodiments of the refrigerated container provided in this application, the refrigerated container includes a container body 10, the interior of which is formed a storage space 11 for storing goods, and one end of the container body 10 is open to facilitate loading and unloading of goods.

[0058] The refrigerated container also includes a door 20, which is located at the open end of the container body 10 and used to open or close the container body 10. The door is an opaque structure, and when the door is closed, it seals the container. The opaque and airtight design of the door ensures a low-temperature environment within the storage space, prevents light from affecting the internal goods, reduces the risk of oxidation, improves storage efficiency, and extends the shelf life of the goods.

[0059] The refrigerated container also includes a refrigeration unit 30, which is located at the end of the container 10 opposite to the door 20. The refrigeration unit 30 is used to provide cold air to the interior of the storage space 11, so that the goods inside the container 10 are preserved in a suitable low-temperature environment.

[0060] The refrigeration unit 30 is an integrated refrigeration unit. The evaporator side of the refrigeration unit 30 faces the inside of the container 10 and is directly connected to the storage space 11. The condenser side of the refrigeration unit 30 faces the outside of the container 10 and is in contact with the external environment, thus improving heat exchange efficiency. The integrated refrigeration unit occupies less internal space in the container 10, thereby increasing the storage capacity of the refrigerated container.

[0061] The refrigeration unit 30 includes a compressor, condenser, expansion valve, and evaporator, which work together to perform a refrigeration cycle. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation.

[0062] The compressor compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure refrigerant gas. This high-temperature, high-pressure refrigerant gas enters the condenser, where it exchanges heat with external air or cooling water, releasing heat and liquefying into a high-temperature, high-pressure liquid refrigerant. The liquid refrigerant then enters the expansion valve, where it is throttled and depressurized, transforming into a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant enters the evaporator, where it absorbs heat from the storage space 11, lowering the internal temperature. A fan then blows the cooled surrounding air into the storage space 11, accelerating heat transfer. The low-temperature, low-pressure refrigerant gas, after vaporization in the evaporator, re-enters the compressor, completing one refrigeration cycle. This process is repeated to achieve a continuous cooling effect.

[0063] like Figures 1-5 As shown, an inner door 40 is provided inside the door 20. The inner door 40 will be described below through two embodiments.

[0064] In some embodiments, the inner door 40 is located at the opening end and inside the door 20. The inner door 40 can open or close the storage space 11. At least a portion of the structure of the inner door 40 is light-transmitting, and the inner door 40 is a non-sealing door. It is used to block the opening end and allow external light and air to enter the storage space 11 when the door 20 is open and the inner door 40 is closed.

[0065] In the above embodiments, the inner door 40 is located on the inner side of the box door 20 and blocks the opening end in the closed state, avoiding direct communication between the storage space 11 and the outside, effectively reducing the loss of cold air, reducing the impact on the internal temperature of the storage space 11 during the opening operation, improving the refrigeration effect, and reducing energy efficiency. At least part of the structure of the inner door 40 has light transmittance. When the box door 20 is opened, external light can enter the storage space 11 through the light transmittance part, thereby providing a natural light source for the internal operator, without the need to increase artificial lighting inside the box 10, thereby reducing energy consumption. In addition, the inner door 40 is designed as a non-sealed door, which can allow external air to enter the storage space 11, thereby ensuring the safety of the internal operator.

[0066] In other embodiments, the inner door 40 is located on the opening end and on the inner side of the box door 20. The inner door 40 can open or close the storage space 11. The inner door 40 blocks the opening end in the closed state, and allows external light and air to pass through and enter the storage space 11.

[0067] In the above embodiments, the inner door 40 is located on the inner side of the box door 20 and blocks the opening end in the closed state, avoiding direct communication between the storage space 11 and the outside, effectively reducing the loss of cold air, reducing the impact on the internal temperature of the storage space 11 during the opening operation, improving the refrigeration effect, and reducing energy efficiency. In addition, the inner door 40 can still allow external light and air to pass through and enter the storage space 11 in the closed state, thereby providing a natural light source and necessary oxygen for the internal operator, reducing the dependence on artificial lighting, reducing energy consumption, improving the working environment, and to some extent, balancing the refrigeration effect and the working demand.

[0068] It can be understood that the structure of the inner door 40 defined by the above two embodiments may have an intersection, and it cannot be understood as being defined in a mutually exclusive manner.

[0069] The following describes related embodiments of the refrigerated container. It should be noted that the schemes described in the following embodiments are applicable to the refrigerated container with the inner door 40 defined by the above two embodiments.

[0070] In some embodiments, at least part of the structure of the inner door 40 is designed to be transparent. Through the transparent design, in some cases where it is necessary to check the goods in the box, the inner door 40 does not need to be opened, and only the box door 20 needs to be opened. The transparent part of the inner door 40 can be used to directly observe the internal goods, thereby facilitating the goods inspection operation, improving the operation efficiency, reducing the loss of cold air, and improving the practicability of the refrigerated container. For example, in some cases, the door body of the inner door 40 is made of transparent material; or, a transparent window is arranged on the door body, and the transparent window can be arranged at a position close to the upper part of the door body to facilitate viewing.

[0071] In some embodiments, as shown in Figure 3 The inner door 40 includes a first door body 41 and a second door body 42 arranged side by side, the first door body 41 is normally closed, and the second door body 42 is movable relative to the first door body 41 to open or close the storage space 11; when the second door body 42 is opened, a passage is formed for the operator to enter the storage space 11, and during the operation, the box door 20 is opened and the second door body 42 is closed.

[0072] In the above embodiment, the inner door 40 includes a first door body 41 and a second door body 42 arranged side by side, wherein the first door body 41 is designed as a normally closed type, and the first door body 41 is always in a closed state in the opened or closed state of the second door body 42, so that a part of the passage for the storage space 11 to communicate with the outside is always in a shielding state, which effectively reduces the loss of cold air and helps to maintain the stability of the temperature in the storage space 11, avoiding the significant reduction of cold air in the box due to the opening of the inner door 40 as a whole; the second door body 42 is designed to be openable to provide a passage for the operator to enter or exit the storage space 11. The inner door 40 is designed as two door bodies, which realize different functions, so that the inner door 40 can simultaneously consider the functions of heat preservation and passage provision.

[0073] The sizes of the first door body 41 and the second door body 42 can be designed according to different needs. For example, the first door body 41 can be designed to occupy most of the area of the inner door 40, and the size of the second door body 42 can only meet the needs of the operator to enter or exit the storage space 11, so as to reduce the amount of cold air loss caused by opening the door as much as possible, while considering the convenience of entering and exiting.

[0074] It can be understood that the first door body 41 is designed as a normally closed type to improve the stability of the temperature in the storage space 11, but when goods need to be loaded or unloaded, the first door body 41 can also be opened to facilitate the entry and exit of large goods or equipment. This design provides flexibility to ensure that the inner door 40 can be opened as a whole when needed, facilitating the loading and unloading of goods, while maintaining the low-temperature environment in the storage space 11 as much as possible during the operation of personnel entering and exiting.

[0075] In some embodiments, as shown in Figure 5 A rotating shaft 43 is installed at the top of the box body 10 corresponding to the position of the second door body 42, the second door body 42 is a transparent roller shutter, and the second door body 42 is wound around the outer periphery of the rotating shaft 43; when the rotating shaft 43 rotates in a first direction, the second door body 42 can be wound up and the storage space 11 is opened; when the rotating shaft 43 rotates in a second direction, the second door body 42 can be unfolded downward and the storage space 11 is closed; the second direction is opposite to the first direction.

[0076] In the above embodiments, a specific implementation of the second door 42 is provided. The second door 42 adopts a transparent roller shutter design and is coordinated with a rotating shaft 43, which cleverly realizes the flexible opening and closing of the storage space 11. This design not only allows operators to clearly observe the goods inside the container through the transparent roller shutter without opening the door, improving work efficiency and reducing cold air loss; the roller shutter structure occupies little space when stored, optimizing the utilization of the internal space of the container 10. At the same time, the raising and lowering of the roller shutter is controlled by the rotating shaft 43, making operation simple and quick, reducing the labor intensity of operators, and improving the ease of use and practicality of the refrigerated container.

[0077] In addition, the rotating shaft 43 can be rotated manually or by motor drive, and those skilled in the art can choose according to actual needs.

[0078] The above embodiments do not limit the implementation of the first door 41, but the first door 41 can also be implemented in the same way as the second door 42, that is, the first door 41 can also be designed as a transparent roller shutter and rolled around the outer periphery of another rotating shaft 43. By rotating the rotating shaft 43 in a specific direction, the first door 41 can be rolled up to open the storage space 11; when rotated in the opposite direction, the first door 41 can be unfolded downwards to close the storage space 11.

[0079] When the first door 41 and the second door 42 adopt the same door structure, when the operator needs to enter the storage space 11, one door is opened while the other door remains closed.

[0080] In some embodiments, such as Figure 6 and Figure 7 As shown, the box body 10 includes a bottom plate 12. A pressure plate 51 is provided on the upper surface of the bottom plate 12 at the position corresponding to the second door 42. The pressure plate 51 extends along the width direction of the opening end. The pressure plate 51 is used to press the lower end of the second door 42 onto the bottom plate 12 when the second door 42 is opened and the storage space 11 is closed, so as to keep the second door 42 in the closed state.

[0081] In the above embodiment, the use of a roller shutter for the second door 42 provides a method for fixing the door in its closed state. When the second door 42 unfolds downwards and closes the storage space 11, the lower end of the second door 42 extends to the upper surface of the bottom plate 12 of the cabinet 10. A pressure plate 51 presses the lower end of the second door 42 onto the bottom plate 12, and the weight of the pressure plate 51 itself secures the second door 42 in its unfolded state, ensuring the reliability of the second door 42 when closed. Simultaneously, the structure of the pressure plate 51 is easy to operate; when it is necessary to open the second door 42, simply lifting the pressure plate 51 will roll the second door 42 upwards, thus opening the door.

[0082] In some embodiments, as shown in Figure 6 The length of the pressing plate 51 matches the width of the second door body 42, so that the lower end of the second door body 42 is pressed on the bottom plate 12 of the box body 10 by the pressing plate 51 in the closed state, improving the contact area between the pressing plate 51 and the second door body 42, achieving tight pressing in the entire width range, ensuring the fixing effect on the second door body 42, and also improving the sealing effect of the closed position of the lower end of the second door body 42, avoiding the outflow of cold air from the unpressed position of the lower end, and ensuring the heat preservation performance of the refrigerated container.

[0083] In some embodiments, as shown in Figure 6 and Figure 7 A handle 52 is installed on the upper surface of the pressing plate 51, which can be used to apply force to the pressing plate 51, so that the operating personnel can easily lift or lower the pressing plate 51, thereby quickly releasing or fixing the second door body 42, improving the convenience of operation.

[0084] When the first door body 41 is implemented by using the same roller shutter scheme as the second door body 42, another pressing plate 51 is provided for the first door body 41 to fix the closed state of the first door body 41. The implementation of the other pressing plate 51 is the same as above, and details are not repeated here.

[0085] In some embodiments, as shown in Figure 6 and Figure 7 A reinforcing member 53 is provided on the upper surface of the bottom plate 12, one side of the reinforcing member 53 is connected with the bottom plate 12, and the other side is connected with the pressing plate 51.

[0086] In the above embodiments, the pressing plate 51 is firmly fixed on the bottom plate 12 of the box body 10 by the reinforcing member 53, effectively avoiding the pressing plate 51 from being separated from the bottom of the box body 10 due to external force during use. The provision of the reinforcing member 53 not only enhances the stability of the pressing plate 51, but also improves the structural reliability of the entire refrigerated container, ensuring that the pressing plate 51 can reliably fix the lower end of the second door body 42 in the closed state. For example, the reinforcing member 53 can be implemented by using adhesive tape or buckles. The reinforcing member 53 can be provided in multiple positions along the width direction of the pressing plate 51 for reinforcement at different positions.

[0087] In some embodiments, the roller shutter is made of soft material or hard multi-segment sheet material, and can be retracted and extended by rotating the rotating shaft 43.

[0088] The soft material roll-up curtain has good flexibility and ductility, can be easily rolled up on the rotating shaft 43, occupies small space, is convenient to store and unfold, is suitable for scenes that need to frequently open and close the door, is easy to operate, does not cause additional occupation to the storage space 11, has good light transmittance and certain heat insulation performance. The hard multi-section sheet material provides higher structural strength and stability, is suitable for use in situations that need more frequent goods loading and unloading and larger load, ensures that the roll-up curtain maintains good performance and durability in long-term use. In the specific selection process, different use requirements and application scenarios can be selected.

[0089] It can be understood that the above-mentioned first door body 41 and second door body 42 in the application adopt a roll-up curtain mode only as an example, in addition to the above mode, other door body structures can also be used by those skilled in the art to realize, for example, in some other embodiments, the first door body 41 and the second door body 42 can also adopt the form of left and right sliding doors.

[0090] At present, the refrigerated container mostly adopts a split type refrigeration unit and has no air duct design, when temperature control is performed on a forty-foot large container, it is easy to cause uneven air field, resulting in low temperature on the side close to the cold machine and high temperature on the side opposite to the cold machine, causing the internal temperature of the storage space 11 to be uncontrollable.

[0091] Based on the above problems, in some embodiments, as shown in Figure 5 The air outlet of the refrigeration unit 30 is located at the bottom of the storage space 11, and the air return port is located at the upper part of the storage space 11; an air duct 61 is formed at the bottom of the storage space 11, the air duct 61 is in communication with the air outlet and extends towards the direction close to the inner door 40, and the top of the air duct 61 is provided with a ventilation port 62 in communication with the storage space 11.

[0092] The refrigeration unit 30 discharges air from the lower side and returns air from the upper side, and an air duct 61 is formed at the bottom of the storage space 11; cold air enters the air duct 61 from the air outlet, flows to the opposite side of the refrigeration unit 30 through the air duct 61, and flows into the storage space 11 upwardly through the ventilation port 62, and the cold air after heat exchange in the storage space 11 enters the refrigeration device through the air return port.

[0093] In the above scheme, the physical characteristics of the cold air density being larger and the hot air density being smaller are utilized, the flow direction of the air field of the bottom air duct 61 is designed, and the bottom air duct 61 provides a flow path for the cold air from the refrigeration unit 30 to the opposite side, ensuring the flow of the cold air in the entire length range inside the container 10; by means of the air vent 62 at the top of the air duct 61, the flow of the cold air from bottom to top into the storage space 11 is realized, ensuring that the cold air can be uniformly distributed in the entire storage space 11, and the refrigeration effect inside the container is improved. In addition, in the open state of the door 20, the inner door 40 remains closed, which has little effect on the air field inside the container 10, improves the stability of the temperature inside the container, and reduces energy consumption.

[0094] In some embodiments, as shown in Figure 8 and Figure 9 , a wind deflector 80 is provided at the air outlet, and the wind deflector 80 extends from the air outlet to the end of the air duct 61 near the air outlet. The wind deflector 80 is provided at the air outlet, and the other end of the wind deflector 80 is connected with the air duct 61 at the bottom of the container 10. The wind deflector 80 can guide the cold air to smoothly enter the air duct 61, realize the connection of the air outlet and the air duct 61, avoid the loss of cold air at the air outlet without entering the air duct 61, and improve the refrigeration effect.

[0095] The shape of the wind deflector 80 is designed according to the position of the air outlet and the distance from the air duct 61. In Figure 8 , the cross section of the wind deflector 80 gradually decreases from the air outlet to the position of the air duct 61, so as to gather the cold air towards the bottom of the container 10 and guide the cold air into the air duct 61.

[0096] In some embodiments, as shown in Figure 8 and Figure 12 , a baffle 90 is provided in the wind deflector 80, and the baffle 90 is located between the air outlet and the air duct 61. The angle of the baffle 90 relative to the air outlet is adjustable, and the air volume entering the air duct 61 from the air outlet is changed by adjusting the angle of the baffle 90 relative to the air outlet.

[0097] The baffle 90 is located between the air outlet and the air duct 61. According to different refrigeration requirements, the angle of the baffle 90 is adjusted to cover the air outlet or open the air outlet to different degrees, so as to adjust the air volume and realize the required refrigeration effect. The refrigerated container can adapt to different cargo loading and refrigeration requirements, and the versatility and adaptability of the equipment are improved. As shown in Figure 12 , the baffle 90 can be provided with a plurality of baffles along the width direction of the air outlet.

[0098] In some embodiments, as shown in Figures 9-11As shown, multiple first air guide plates 71 are arranged side by side on the base plate 12. The surface of the first air guide plate 71 is vertical and extends from the refrigeration unit 30 to the inner side of the inner door 40. A second air guide plate 72 is provided on the top of each first air guide plate 71. The surface of the second air guide plate 72 is horizontal and its two sides extend to the sides of the first air guide plate 71 respectively. An air duct 61 is formed between adjacent first air guide plates 71 and a ventilation opening 62 is formed between adjacent second air guide plates 72.

[0099] Between every two adjacent first air guide plates 71, an air duct 61 is formed, resulting in multiple air ducts 61 at the bottom of the box 10. These multiple air ducts 61 distribute the cold air delivered from the air outlet more evenly throughout the entire box 10, ensuring that the cold air can flow to every corner of the bottom of the box, avoiding the accumulation or insufficiency of cold air in local areas, thereby improving the temperature uniformity within the storage space 11.

[0100] The second air guide plate 72 together form the structural support surface at the bottom of the box 10, enhancing the structural strength and stability of the bottom of the box 10. At the same time, ventilation openings 62 for cold air to flow upward are also retained between adjacent second air guide plates 72. The cold air inside each air duct 61 can enter the storage space 11 through the upper ventilation openings 62, further optimizing the airflow distribution and ensuring that the cold air can smoothly enter the storage space 11 from the air duct 61, improving the temperature uniformity in the storage space 11.

[0101] like Figure 11 As shown, the air duct 61 structure in the above embodiment can be implemented by I-beam support beams. Multiple I-beam support beams are arranged side by side on the bottom plate 12 of the box body 10. The web of the I-beam support beams constitutes the first air guide plate 71, and the upper flange of the I-beam support beams constitutes the second air guide plate 72. An air duct 61 is formed between the webs of two adjacent I-beam support beams, and a ventilation opening 62 is formed between the upper flanges of two adjacent I-beam support beams.

[0102] In some embodiments, such as Figure 10 As shown, multiple ventilation holes are formed on the first air guide plate 71, which allows cold air to flow between adjacent air ducts, realizes the exchange of cold air between different air ducts, can balance the air pressure in each air duct, avoid uneven temperature in some areas due to excessive or insufficient air volume, and improve the refrigeration effect of the entire refrigerated container.

[0103] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0104] The above examples are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, all of them should be covered in the technical solution range of the present application claimed.

Claims

1. A refrigerated container, characterized in that, The application relates to a refrigerator, which comprises a box body with an internal storage space, an open end of the box body, a box door arranged at the open end of the box body, the box door being a lightproof structure and sealing the box body when the box door closes the box body, a refrigeration unit arranged at the end of the box body opposite to the box door, the refrigeration unit being used for providing cold air into the storage space, an inner door arranged at the open end and on the inner side of the box door, the inner door being used for opening or closing the storage space, at least part of the structure of the inner door being light-transmissive, the inner door being a non-sealing door, and the inner door being used for shielding the open end and allowing external light and air to enter the storage space when the box door is opened and the inner door is closed. The inner door comprises a first door body and a second door body arranged side by side, the first door body being a normally closed type, and the second door body being movable relative to the first door body. When the second door body is opened, a channel for an operator to enter the storage space is formed, and during operation, the box door is opened and the second door body is closed. A rotating shaft is arranged at the top of the box body and corresponds to the position of the second door body, the second door body is a transparent roller shutter, and the second door body is wound on the outer periphery of the rotating shaft. When the rotating shaft rotates in a first direction, the second door body is wound upwards and the storage space is opened.

2. The refrigerated container of claim 1, wherein, When the rotating shaft rotates in a second direction, the second door body is unwound downwards and the storage space is closed. The second direction is opposite to the first direction.

3. The refrigerated container of claim 2, wherein, The box body comprises a bottom plate, an upper surface of the bottom plate is provided with a pressing plate, the pressing plate extends along the width direction of the open end, and the pressing plate is used for pressing the lower end of the second door body on the bottom plate when the second door body unwinds and closes the storage space. A reinforcing piece is arranged on the upper surface of the bottom plate, one side of the reinforcing piece is connected with the bottom plate, and the other side of the reinforcing piece is connected with the pressing plate. A handle is arranged on the upper surface of the pressing plate. An air outlet of the refrigeration unit is arranged at the bottom of the storage space, and an air return port is arranged at the upper portion of the storage space.

4. The refrigerated container of claim 3, wherein, An air duct is arranged at the bottom of the storage space, the air duct is communicated with the air outlet and extends towards the inner door, and a ventilation port is arranged at the top of the air duct and communicated with the storage space.

5. The refrigerated container of claim 4, wherein, Cold air enters the air duct from the air outlet, flows to the side opposite to the refrigeration unit through the air duct, and flows upwards into the storage space through the ventilation port, and the cold air in the storage space flows into the refrigeration unit through the air return port after heat exchange.

6. The refrigerated container of claim 4, wherein, A wind deflector is arranged at the air outlet, the wind deflector extends from the air outlet to the end of the air duct close to the air outlet.

7. The refrigerated container of claim 1, wherein, A baffle is arranged in the wind deflector, the baffle is arranged between the air outlet and the air duct, and the angle of the baffle relative to the air outlet is adjustable. The box body comprises a bottom plate, a plurality of first baffles are arranged side by side on the bottom plate, the plate surface of the first baffle is vertical, and the first baffle extends from the refrigeration unit to the inner side of the inner door. ​ 8. The refrigerated container of claim 7, wherein, ​ ​ 9. The refrigerated container of claim 7, wherein, ​ A second air deflector is arranged on the top of each first air deflector, and the plate surface of the second air deflector is horizontal and the two side edges thereof extend to the two sides of the first air deflector respectively; The air ducts are formed between the adjacent first air deflectors, and the air vents are formed between the adjacent second air deflectors.

10. A refrigerated container characterized by The application relates to a refrigerator. A box body is internally provided with a storage space, and one end of the box body is open; A box door is arranged at the open end of the box body, the box door is of a lightproof structure, and the box door seals the box body when the box door is closed; A refrigerating unit is arranged at the end of the box body opposite to the box door, and the refrigerating unit is used for providing cold air into the storage space; An inner door is arranged at the open end and located at the inner side of the box door, the inner door can open or close the storage space, the inner door blocks the open end in the closed state, and external light and air pass through and enter the storage space.

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