Box type sunning device and system

Abstract

The utility model discloses a box type sunning device and a box type sunning system. The box type sunning device comprises a processing unit, a processing unit opening is formed in one side of the processing unit, a processing unit door capable of being opened and closed is arranged at the processing unit opening, and a ventilation opening is formed in the side face, except the processing unit opening, of the processing unit; the interior of the treatment unit is an internal sunning space, a lamp is arranged at the upper part of the internal sunning space, and a tray is also accommodated in the internal sunning space; the tray comprises a breathable net and a tray side wall connected with the edge of the breathable net; the side wall of the tray extends to the position below the breathable net so that an interlayer space can be formed below the breathable net. Through ventilation through holes are distributed in the side wall of the tray, and a ventilation gap is formed between the side wall of the tray and the processing unit. According to the utility model, the sunning process is completed in a constant-temperature and constant-humidity environment which is relatively closed with the outside, and the tray ensures the required ventilation effect, so that the manufactured tea leaves are more sanitary and do not contain dust compared with the traditional process, and the industrial production is more favorably formed.

Description

Technical Field

[0001] This utility model belongs to the technical field of tea leaf processing equipment, specifically relating to a box-type sun-drying device and system. Background Technology

[0002] Sun-drying is a crucial step in tea processing. Traditionally, tea leaves are spread manually on the ground and exposed to sunlight. The main problem with this method is that dust and impurities easily contaminate the leaves during open-air drying, posing a food safety risk. While some patents design large-scale equipment systems for sun-drying and other processing methods, these systems are complex and not easily installed outdoors or in simple factory conditions. Furthermore, they typically process large batches of tea leaves at once, making them suitable only for large-scale production enterprises and difficult to promote in wider areas. Therefore, many tea farmers and manufacturers still use traditional methods. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a box-type sun-drying device and system, which solves the problems that existing sun-drying devices are inconvenient to set up and use, or that open-air sun-drying will mix in dust and be unsanitary. It realizes the integration of the equipment required for sun-drying into a modular structure, that is, forming an independent processing unit within the box-type structure that meets the environmental conditions such as temperature, humidity, light, and ventilation required for sun-drying, which is more conducive to industrial production.

[0004] According to the technical solution of this utility model, this utility model provides a box-type sun-drying device, including a processing unit; the processing unit has a hollow box structure, with an opening on one side and a door that can be opened and closed at the opening, and a ventilation opening on the side of the processing unit other than the opening; the interior of the processing unit is an internal sun-drying space, with a lamp installed at the top of the internal sun-drying space, and a tray also contained in the internal sun-drying space, the tray being located below the lamp; the tray includes a breathable net for holding tea leaves and a tray sidewall connected to the edge of the breathable net; the tray sidewall extends below the breathable net to form a partition space below the breathable net; through-holes are distributed on the tray sidewall, and a breathable gap exists between the tray sidewall and the processing unit.

[0005] In some embodiments, the tray is a drawer-type structure that can enter and exit the processing unit through the processing unit opening of the processing unit, and the processing unit door is fixedly connected to the tray so that the processing unit door closes the processing unit opening of the processing unit when the tray is pushed into the processing unit.

[0006] In some embodiments, the processing unit door is provided with a processing unit door insulation layer, and / or, the processing unit door is provided with an indicator light for displaying the operating status of the processing unit.

[0007] In some implementations, the area of ​​the luminaire completely covers the tray; and / or, the luminaire is a fluorescent strip.

[0008] In some implementations, a camera is also provided in the processing unit, with the camera facing the tray.

[0009] According to the technical solution of this utility model, this utility model also provides a box-type sun-drying system, including an outer box, the outer box being divided into a sun-drying processing room and an air-conditioning equipment room; the sun-drying processing room has two or more box-type sun-drying devices as described in this utility model; the sun-drying processing room is also equipped with environmental monitoring sensors, including temperature sensors and / or humidity sensors; the air-conditioning equipment room is connected to the sun-drying processing room through a ventilation channel, and the air-conditioning equipment room contains air-conditioning equipment.

[0010] In some embodiments, the sun-drying processing room is equipped with processing unit partitions and a sun-drying processing room insulation layer. The insulation layer is located outside the processing unit partitions, and the insulation layer and processing unit partitions enclose multiple processing units distributed in multiple layers and columns. The processing unit opening of each processing unit is located on the front side, and the ventilation opening of each processing unit is located on the rear side. The ventilation opening is connected to the ventilation channel. The part of each processing unit other than the processing unit opening and the ventilation opening is closed, so that the processing units are independent of each other.

[0011] In some embodiments, the air conditioning equipment room is located on any side of the sun-drying processing room other than the front side; the sun-drying processing room is divided into processing unit space and ventilation channel space, with the ventilation channel space located behind the processing unit space; all processing units are located within the processing unit space, and all ventilation channels are located within the ventilation channel space.

[0012] In some embodiments, the processing unit also includes a camera facing the tray; it also includes a control system, with the camera, environmental monitoring sensors, lighting fixtures, and air conditioning equipment all connected to the control system. Preferably, the camera captures images of the tea leaves during processing, and then uses an AI algorithm to calculate the sun-drying effect and automatically adjust the sun-drying time.

[0013] In some embodiments, an outer casing opening is provided on the side of the outer casing corresponding to the opening of the processing unit, a left door panel is hinged to the left edge of the outer casing opening, a right door panel is hinged to the right edge of the outer casing opening, and an upper door panel is hinged to the upper edge of the outer casing opening; and / or, an outer casing insulation layer is provided on the inner wall of the outer casing.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] 1. In the box-type sun-drying device of this utility model, the sun-drying process can be completed in a relatively sealed constant temperature and humidity environment, that is, in a box-type processing unit. The finished tea leaves are more hygienic and dust-free than those made by traditional processes, which is more conducive to industrialized production. In addition, the trays are equipped with breathable structures on the sides and bottom to ensure the required ventilation effect and avoid problems such as fermentation of tea leaves due to poor ventilation during the sun-drying process. It can be processed around the clock and ensures stable processing results.

[0016] 2. In the box-type sun-drying system of this utility model, the overall exterior adopts a box-type structural design, such as a shipping container, which facilitates the overall transportation and layout of the system. The box-type structure can be placed directly on the outdoor ground, and its internal environment is controlled by the air conditioning equipment integrated within it, thus enabling its application in more scenarios. The device has multiple relatively independent processing units, so it can process small batches of tea leaves as needed. As an application method, it can be used as a shared device for multiple tea farmers, with each person using one or several processing units at a time. It is convenient to use, highly flexible, easy to promote, and has high economic value. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal main structure of the box-type sun-drying system provided by this utility model (some structures in the processing unit in the upper right corner are hidden to show the rest of the structure).

[0018] Figure 2 This is a top view of the internal structure of the box-type sun-drying system provided by this utility model (the lamps are hidden in the processing unit on the right to show the structure below them).

[0019] Figure 3 This is a cross-sectional structural diagram of the tray of the box-type drying device provided by this utility model.

[0020] Figure 4 This is a schematic diagram of the ventilation channel of the box-type sun-drying system provided by this utility model.

[0021] Figure 5 This is a schematic diagram of the outer casing of the box-type sun-drying system provided by this utility model in the open state.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Outer casing; 11. Left side door panel; 12. Right side door panel; 13. Insulation layer of outer casing; 2. Sun-drying processing room; 21. Processing unit; 22. Processing unit partition; 23. Processing unit door; 24. Lighting fixtures; 25. Environmental monitoring sensor; 26. Ventilation opening; 27. Insulation layer of sun-drying processing room; 28. Indicator light; 29. ​​Camera; 201. Ventilation channel space; 202. Air inlet channel; 203. Air return channel; 3. Air conditioning equipment room; 4. Tray; 41. Tray side wall; 42. Tray bottom plate; 43. Ventilation holes; 44. Ventilation mesh; 45. Partition space. Detailed Implementation

[0024] This utility model provides a box-type sun-drying device and system, which solves the problems of existing sun-drying devices being inconvenient to set up and use, or the problem of dust and unsanitary conditions caused by open-air sun-drying. It realizes the integration of the equipment required for sun-drying into a modular structure, that is, forming an independent processing unit within the box-type structure that meets the environmental conditions such as temperature, humidity, light, and ventilation required for sun-drying, which is more conducive to industrialized production.

[0025] Please see Figures 1 to 3 This utility model discloses a box-type sun-drying device, comprising a processing unit 21. The processing unit 21 has a hollow box structure, with an opening on one side and a door 23 that can be opened and closed at the opening. A ventilation opening 26 is provided on the side of the processing unit 21 other than the opening. The interior of the processing unit 21 is an internal sun-drying space. A lamp 24 is installed at the top of the internal sun-drying space. A tray 4 is also contained within the internal sun-drying space, located below the lamp 24. The lamp 24 is opposite to the tray 4 so that the lamp 24 illuminates the tea leaves placed in the tray 4.

[0026] The tray 4 includes a breathable mesh 44 for holding tea leaves and a tray sidewall 41 connected to the edge of the breathable mesh 44. The breathable mesh 44 is made of food-grade material and is in direct contact with the tea leaves. The tray sidewall 41 extends below the breathable mesh 44 to form a partition space 45 below the breathable mesh 44. The tray sidewall 41 has through-holes 43 distributed on it; specifically, the tray sidewall 41 is covered with enough breathable holes 43, meaning that a sufficient number of breathable holes 43 are provided on the tray sidewall 41, and the area with the breathable holes 43 covers a sufficient area of ​​the tray sidewall 41. There is a breathable gap between the tray sidewall 41 and the processing unit 21 to allow air circulation. Of course, the airflow rate and the size of the breathable holes 43 are such that the tea leaves will not fall out of the breathable holes 43. Of course, the sides of the partition space 45 are also tray sidewalls 41, with ventilation holes 43 and ventilation gaps, or it can be understood that the partition space 45 forms a larger ventilation gap. During the sun-drying process, air can enter the tray 4 from the side or top, and then flow freely, including flowing through the tea leaves in the left-right and up-down directions, ensuring airflow between the tea leaves and avoiding fermentation due to insufficient ventilation. Generally, only one or two layers of tea leaves are laid on the ventilation net 44 to ensure ventilation.

[0027] More specifically, in Figure 3 In the illustrated embodiment, the tray 4 further includes a tray base plate 42, which may or may not have through-hole structures for ventilation. The tray base plate 42 may be in direct contact or indirect contact with the inner wall of the processing unit 21. The tray base plate 42 provides further structural support and improves structural strength; and it may also form a movable connection, such as a sliding connection, between the tray base plate 42 and the inner wall of the processing unit 21, making it easier to use.

[0028] Preferably, the tray 4 is a drawer-type structure that allows entry and exit from the internal space of the processing unit 21 through its opening, facilitating the loading and unloading of tea leaves. For example, the tray 4 may be slidably connected to the inner wall of the processing unit 21, or there may be no connection between the two, with the tray 4 simply placed directly into the internal sun-drying space. Alternatively, other mechanical structures may be used to allow the tray 4 to enter and exit the internal sun-drying space of the processing unit 21. More preferably, the processing unit door 23 is fixedly connected to the tray 4, so that when the tray 4 is pushed into the processing unit 21, the processing unit door 23 closes the opening of the processing unit 21. It is conceivable that in some other embodiments, the processing unit door 23 and the tray 4 are independent, requiring separate operation and control of both.

[0029] Preferably, the processing unit door 23 is provided with a processing unit door insulation layer to achieve a better airtight insulation effect when closed. The processing unit door 23 can be optionally embedded in a plug-like structure to seal the opening of the processing unit. It should be noted that... Figure 1 For illustrative purposes only. In practice, after the processing unit door 23 is closed, the light fixture 24 is preferably located inside the processing unit door 23, so that only the closed processing unit door 23 is visible from the outside. More preferably, the processing unit door 23 is provided with indicator lights 28 for displaying the operating status of the processing unit 21; for example... Figure 1 As shown, each processing unit 21 is equipped with three indicator lights 28, which correspond to the idle, running and completed states respectively. The corresponding indicator light will light up in the corresponding state so as to make it easy to see intuitively.

[0030] Preferably, in the processing unit 21, the area of ​​the lamp 24 completely covers the tray 4, thereby providing good and relatively uniform illumination to the tea leaves in all parts of the tray 4. The lamp 24 is preferably a fluorescent light strip, that is, a light strip with a fluorescent light fixture as the light-emitting component, specifically, for example, a full-spectrum fluorescent LED light strip, which can select the spectrum closest to sunlight to provide a uniform and good simulation of sunlight.

[0031] Preferably, a camera 29 is also provided in the processing unit 21. The camera 29 is directed toward the tray 4 to take pictures of the tea leaves inside, so that the user or the intelligent control system can know the condition of the tea leaves inside, thereby identifying and judging the sun-drying effect, and adjusting the sun-drying time based on the situation, so as to further ensure the quality of the sun-drying process.

[0032] Based on the box-type sun-drying device (i.e., unit structure) of this utility model, this utility model also provides a box-type sun-drying system, which has multiple of the aforementioned unit structures to form an integrated sun-drying equipment system. Please refer to [link / reference]. Figure 1 , Figure 2 The box-type foraging system of this utility model includes an outer box 1, which is, for example, a cuboid structure. The outer box 1 is divided into a foraging processing room 2 and an air conditioning equipment room 3, which are separated, for example, by a box partition. Preferably, the inner wall of the outer box 1 is provided with an outer box insulation layer 13, and the outer box 1 has an openable and closable door to further improve dustproof and heat insulation effects.

[0033] The sun-drying processing room 2 contains two or more box-type sun-drying devices as described in this utility model. In other words, the sun-drying processing room 2 contains two or more processing units 21, each of which has the aforementioned related structure. The sun-drying processing room 2 is also equipped with an environmental monitoring sensor 25, which includes a temperature sensor and / or a humidity sensor. Preferably, the environmental monitoring sensor 25 is equipped with both a temperature sensor and a humidity sensor, or an integrated temperature and humidity sensor, to monitor the temperature and humidity within the sun-drying processing room 2 (or the processing unit 21 where the environmental monitoring sensor 25 is located).

[0034] The air conditioning equipment room 3 is connected to the sun-drying processing room 2 via a ventilation duct. The air conditioning equipment room 3 contains air conditioning equipment (which can be implemented using existing technology and is not shown in the figure). Optionally, the air conditioning equipment room 3 has an air conditioning equipment room door, which is normally closed, placing the air conditioning equipment in a relatively sealed environment, protecting the equipment, or helping to maintain the temperature and other parameters of the overall internal space. Optionally, the air conditioning equipment room door or the outer casing 1 has a control panel for controlling the air conditioning equipment or the overall control system. The functions of the air conditioning equipment include ventilation and temperature control, thereby achieving the required constant temperature and humidity environment based on the set process parameters and the monitoring results of the environmental monitoring sensor 25. According to some embodiments, the entire outer casing 1 forms a constant temperature and humidity space, or the entire sun-drying processing room 2 forms a constant temperature and humidity space, or each processing unit 21 forms a constant temperature and humidity space (further optionally, the environmental parameters such as temperature, humidity, and light in different processing units 21 are adjustable).

[0035] More specifically, the sun-drying processing room 2 is equipped with processing unit partitions 22 and a sun-drying processing room insulation layer 27. The insulation layer 27 is located outside the processing unit partitions 22, and for example, it is installed on the inner wall of the sun-drying processing room 2. The processing unit partitions 22 separate multiple internal sun-drying spaces, and preferably also have an insulation function. The insulation layer 27 and the processing unit partitions 22 form multiple processing units 21 arranged in multiple layers and columns. This further ensures that the environmental parameters of each processing unit 21 are relatively independent. The processing unit opening of each processing unit 21 is located on the front side, and the ventilation opening 26 of each processing unit 21 is located on the rear side, and the ventilation opening 26 is connected to the ventilation channel. The part of each processing unit 21 other than the processing unit opening and the ventilation opening 26 is closed, so that the processing units 21 are independent of each other. In other words, the sun-drying processing room 2 has a grid structure, similar to a cabinet, where each grid is a processing unit 21. Each grid is independent of the others, and each grid has a ventilation structure at its depth. It is conceivable that in some alternative embodiments, two or more adjacent processing units 21 are connected and have the same environmental parameters such as temperature and humidity.

[0036] Please see Figure 2 Furthermore, the air conditioning equipment room 3 is located on any side of the sun-drying processing room 2 other than the front side (the right side in the illustrated embodiment). The sun-drying processing room 2 is divided into processing unit spaces and ventilation channel spaces 201. The ventilation channel space 201 is located behind the processing unit spaces, that is, the ventilation channel space 201 is adjacent to the ventilation opening 26 located behind the processing unit 21. All processing units 21 are located within the processing unit spaces, and all ventilation channels are located within the ventilation channel spaces 201. The ventilation channels connect the processing units 21 to the air conditioning equipment room 3. In this solution, the required constant temperature and humidity space is formed only within the sun-drying processing room 2 (more specifically, within one or more processing units 21 in operation). Compared with existing sun-drying equipment, the volume ratio of tea leaves in the constant temperature and humidity space in this solution is higher, the structure is more compact, which helps to save space and facilitates the control of air conditioning equipment, and the corresponding power consumption is also relatively lower.

[0037] For more details, please refer to Figure 4The ventilation channels include, for example, an air inlet channel 202 and a return air channel 203. Ventilation vents 26 are located on the insulation layer 27 of the sun-drying processing room behind the processing unit 21. The air inlet channel 202, located within the ventilation channel space 201, is connected to one or more ventilation vents 26. The other end of the air inlet channel 202 is an input end connected to an air conditioning unit, thereby supplying air at a set temperature and flow rate into the processing unit 21. The input end of the return air channel 203 is located within the ventilation channel space 201 or extends into the processing unit 21. The output end of the return air channel 203 exits the sun-drying processing room 2 and connects to the air conditioning room 3 or an air conditioning unit. Thus, the air blown through the tea leaves flows out of the processing unit 21 via the return air channel 203, forming an airflow path. In some embodiments, the airflow is a circulating flow. It is understood that... Figure 4 Only a portion of the structure is shown. In some embodiments, each processing unit 21 has a corresponding vent 26. Preferably, the environmental monitoring sensor 25 is located relatively far from the vent 26 to obtain more stable and accurate data corresponding to the internal environment of the processing unit; in some embodiments, the environmental monitoring sensor 25 is located within the ventilation channel space 201 or within the processing unit 21.

[0038] Preferably, the processing unit 21 is further equipped with a camera 29, which faces the tray 4 to photograph the tea leaves therein. The camera 29 is a camera capable of withstanding a certain high temperature or has heat insulation measures. It also includes a control system, with the camera 29, environmental monitoring sensor 25, lamps 24, and air conditioning equipment all connected to the control system, thereby enabling more automated and intelligent control; for example, the sun-drying effect and tea leaf condition can be judged by image recognition captured by the camera 29, and then the sun-drying duration can be automatically and dynamically adjusted by the control system; furthermore, the temperature, humidity, and wind speed can be automatically adjusted according to outdoor weather conditions or desired weather conditions, and the output of the lamps 24 can be automatically adjusted based on data of natural sunlight exposure time; etc.

[0039] Please see Figure 5Preferably, the front side of the outer casing 1 has an opening. A hinged left door panel 11 is hinged to the left edge of the opening, a hinged right door panel 12 is hinged to the right edge of the opening, and a hinged upper door panel is hinged to the upper edge of the opening. When the left door panel 11, right door panel 12, and upper door panel are closed, the interior of the outer casing 1 is preferably sealed (with necessary ventilation channels to the outside). When the outer casing 1 is opened, the left door panel 11 and right door panel 12 can be rotated approximately 90° along the dotted line in the figure. Then, the upper door panel is flipped up and placed on the upper edge of the left door panel 11 and right door panel 12, thus forming a canopy structure on the upper door panel, ensuring that the tea leaves will not be contaminated even when operating the device in adverse weather conditions.

[0040] In summary, the box-type sun-drying device of this utility model allows the sun-drying process to be completed in a relatively enclosed, constant temperature and humidity environment, i.e., within a box-shaped processing unit. All materials used are food-grade, resulting in tea leaves that are more hygienic and dust-free than those produced using traditional methods, making it more suitable for industrial-scale production. Furthermore, the trays have breathable structures on their sides and bottom, ensuring adequate ventilation and preventing fermentation of the tea leaves during sun-drying due to poor ventilation. This box-type sun-drying device can operate around the clock and guarantees stable processing results. The box-type tea-drying system of this utility model adopts a box-shaped structural design on the outside, such as a shipping container, which facilitates the overall transportation and layout of the system. The box-shaped structure can be placed directly on the ground outdoors, and its internal environment is controlled by an integrated air conditioning unit, thus enabling its application in more scenarios. The device has multiple relatively independent processing units, so it can process small batches of tea leaves as needed. As an application method, it can be used as a shared device for multiple tea farmers, with each person using one or several processing units at a time. It is convenient to use, highly flexible, easy to promote, and has high economic value.

Claims

1. A box-type blueing device, characterized by comprising: The processing unit (21) is in a hollow box structure, and has a processing unit opening on one side and a processing unit door (23) capable of being opened and closed at the processing unit opening; a ventilation opening (26) is arranged on the side of the processing unit (21) other than the processing unit opening; The inside of the processing unit (21) is an internal drying space, a lamp (24) is arranged at the upper part of the internal drying space, and a tray (4) is contained in the internal drying space and located below the lamp (24); The tray (4) comprises a breathable net (44) for containing tea leaves and a tray side wall (41) connected to the edge of the breathable net (44); the tray side wall (41) extends below the breathable net (44) to form a partition space (45) below the breathable net (44); the tray side wall (41) is provided with through air holes (43), and the tray side wall (41) has an air gap with the processing unit (21).

2. The box-type tanning device according to claim 1, characterized in that The tray (4) is in a drawer type structure capable of entering and exiting the processing unit (21) through the processing unit opening of the processing unit (21); the processing unit door (23) is fixedly connected with the tray (4) so that the processing unit door (23) closes the processing unit opening of the processing unit (21) while the tray (4) is pushed into the processing unit (21).

3. The box-type tanning device according to claim 1, characterized in that The processing unit door (23) is provided with a processing unit door heat preservation layer, and / or the processing unit door (23) is provided with an indicator light (28) for displaying the running state of the processing unit (21).

4. The box-type tanning device according to claim 1, characterized in that The area of the lamp (24) completely covers the tray (4); and / or the lamp (24) is a simulated sunlight lamp strip.

5. The box-type tanning device according to claim 1, characterized in that A camera (29) is further arranged in the processing unit (21) and faces the tray (4).

6. A box-type dyeing system, characterized by The outer box (1) is divided into a drying processing room (2) and an air conditioning equipment room (3); the drying processing room (2) is provided with two or more box type drying devices according to any one of claims 1-4; an environmental monitoring sensor (25) is further arranged in the drying processing room (2), and the environmental monitoring sensor (25) comprises a temperature sensor and / or a humidity sensor; the air conditioning equipment room (3) is connected with the drying processing room (2) through a ventilation channel, and the air conditioning equipment room (3) is provided with air conditioning equipment.

7. The box-type cyanotype system according to claim 6, characterized in that The drying processing room (2) is provided with a processing unit partition (22) and a drying processing room heat preservation layer (27), the drying processing room heat preservation layer (27) is located outside the processing unit partition (22), and the drying processing room heat preservation layer (27) and the processing unit partition (22) enclose a plurality of processing units (21) in multiple layers and multiple rows; the processing unit opening of each processing unit (21) is located on the front side, and the ventilation opening (26) of each processing unit (21) is located on the rear side and connected with the ventilation channel; the part of each processing unit (21) other than the processing unit opening and the ventilation opening (26) is closed, so that the processing units (21) are independent of each other.

8. The box-type cyanotype system according to claim 7, characterized in that, The air conditioning equipment room (3) is located on any side of the withering treatment room (2) except the front side; the withering treatment room (2) is divided to form a treatment unit space and a ventilation channel space (201), and the ventilation channel space (201) is located at the rear side of the treatment unit space; the treatment units (21) are all located in the treatment unit space, and the ventilation channels are all located in the ventilation channel space (201).

9. The box-type cyanotype system according to claim 6, characterized in that, A camera (29) is further arranged in the treatment unit (21), and the camera (29) faces the tray (4); a control system is further included, and the camera (29), the environmental monitoring sensor (25), the lamp (24) and the air conditioning equipment are connected with the control system.

10. The box-type dyeing system according to claim 6, characterized in that, An outer box body opening is arranged on the side of the outer box body (1) corresponding to the treatment unit opening, a left side door panel (11) is hingedly arranged on the left side edge of the outer box body opening, a right side door panel (12) is hingedly arranged on the right side edge of the outer box body opening, and an upper door panel is hingedly arranged on the upper edge of the outer box body opening; and / or the inner wall of the outer box body (1) is provided with an outer box body heat preservation layer (13).

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