Device for automatically adjusting air pressure inside and outside box body of refrigerated container

Abstract

The invention provides an automatic regulating device for internal and external air pressure of a refrigerated container body, and relates to the field of refrigeration and air regulation of containers. The device for automatically adjusting the air pressure inside and outside the refrigerated container body comprises a refrigerating unit and further comprises a temperature adjusting assembly, an air adjusting assembly and an air pump assembly, and the temperature adjusting assembly is installed on the inner wall of the end of the container. According to the automatic regulating device for the internal and external air pressure of the refrigerated container body, the temperature regulating assembly is arranged, a centrifugal fan is used for transversely feeding air from the middle of a container, the fed air is dissipated from the upper, lower, front and back surfaces of an omnidirectional refrigeration cover after heat exchange, and compared with direct transverse air blowing, the cold air circulating effect is better, and the temperature of the head and the tail of the container can be rapidly balanced; intelligent two-way gas adjustment is achieved, and the space environment in the container is kept stable. The fruits and vegetables enter a dormant state by reducing or inhibiting the respiration of the fruits and vegetables.

Description

Technical Field

[0001] This invention relates to the field of refrigeration and gas regulation of containers, specifically to an automatic gas pressure regulation device for the inside and outside of a refrigerated container. Background Technology

[0002] Existing refrigerated containers are capable of transporting goods under preset low-temperature conditions. To ensure refrigeration, these containers are typically equipped with refrigeration units. During transport, these refrigeration units need to operate continuously to keep the transported goods refrigerated. However, current refrigerated containers suffer from the following industry pain points:

[0003] 1. Refrigeration equipment is usually installed at the end of the container near the front of the truck. Due to the long length of the container, the cold air does not easily diffuse quickly inside the container during the initial refrigeration, which will cause the temperature at the rear to be higher than that at the front, making it difficult to achieve temperature balance in the short term.

[0004] Second, when a refrigerated container is loaded with goods, the internal air pressure is often the same as the external atmospheric pressure, while the internal temperature is often higher than the required refrigeration temperature. During the refrigeration process, the internal air pressure drops. Although conventional refrigerated containers have air inlets, their diameter is too small. This can result in a significant pressure difference between the inside and outside of the container during refrigeration startup. Due to the large surface area and low rigidity of the container walls, this pressure difference can cause deformation. This phenomenon occurs periodically with each loading, leading to cyclical deformation of the container. This can damage the internal structure of the container walls and cause further deformation, ultimately harming the refrigerated container. This is particularly noticeable in tropical regions or during summer.

[0005] Third, fruits and vegetables undergo respiration within containers, resulting in the loss of nutrients during a certain transportation period. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automatic air pressure regulation device for the interior and exterior of a refrigerated container, which solves the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: an automatic air pressure regulation device for the interior and exterior of a refrigerated container, including a refrigeration unit, and further including a temperature regulation component, an air conditioning component and an air pump component. The temperature regulation component is installed on the inner wall of the end of the container, and the air conditioning component is provided in two sets, both installed on the inner top wall of the container, with the two air outlet directions being opposite.

[0008] The temperature control assembly includes an omnidirectional cooling hood, a blower, and a centrifugal fan. The centrifugal fan draws in air from the lateral direction of the container, and after heat exchange, the cold air is dissipated through the omnidirectional cooling hood to the top, bottom, left, and right sides of the omnidirectional cooling hood.

[0009] Each air conditioning unit is connected to a blower and an air pump assembly. The blower can draw in the cold air from the omnidirectional cooling hood and supply it to the two air conditioning units respectively to balance the cold air inside the container. The air pump assembly is used for intake and exhaust to balance the air pressure inside the container and autonomously sieve the gas to inhibit the respiration of fruits and vegetables.

[0010] Preferably, the air pump assembly includes two sets of air pump bodies and a zeolite molecular sieve membrane A. The zeolite molecular sieve membrane A is installed below the two sets of air pump bodies. The air inlet end of the air pump body can be opened by changing the force of the valve to allow air to enter from the zeolite molecular sieve membrane A, so that the gas passes through the zeolite molecular sieve membrane A.

[0011] Preferably, the air conditioning assembly includes a cover and an air guide plate. The cover is installed on the top of the inner wall of the container, and the air guide plate is installed on the bottom of the cover. The air guide plate is provided with a number of linearly distributed air ducts. The air ducts are inclined. The air guide plates included in the two sets of air conditioning assemblies have their lower ends facing opposite directions.

[0012] It also includes two air supply pipes, both of which are connected to the casing. A zeolite molecular sieve membrane B is fixed in the casing. One air supply pipe is connected to the space between the zeolite molecular sieve membrane B and the inner top wall of the casing, so that the gas can pass through the zeolite molecular sieve membrane B. The other air supply pipe is connected to the space between the zeolite molecular sieve membrane B and the air guide plate, so that the gas can pass directly through the air guide plate without passing through the zeolite molecular sieve membrane B.

[0013] The air supply pipe is connected to the blower and air pump body.

[0014] Preferably, the output end of the blower is equipped with two sets of three-way valves through a pipeline. The air supply pipe is connected to the three-way valve, and the output end of the air pump body is connected to the three-way valve through a pipeline. The three-way valve can switch the blower connection to the air supply pipe, the air pump body connection to the air supply pipe, and switch the opening and closing of the single and double air supply pipes.

[0015] Preferably, the temperature regulating component further includes cooling fins, which are distributed in a ring around the omnidirectional cooling shroud and around the outside of the centrifugal fan. The outer surface of the omnidirectional cooling shroud is provided with a ring of air grooves that run through the inside and outside. The side of the omnidirectional cooling shroud facing the inside of the container is provided with an air inlet. When the centrifugal fan rotates, air is drawn in through the air inlet. After heat exchange with the cooling fins, the air is thrown out from the air grooves in all directions.

[0016] Preferably, the temperature regulating component further includes a base connected to the inner wall of the container. The base has a hollow structure, and a blower is installed in the base. The air intake of the blower is connected to the interior of the omnidirectional cooling hood, so that when the blower intakes air, the gas exchanges heat with the cooling fins and is then sent to the three-way valve.

[0017] Preferably, the refrigeration unit is installed on the side of the base away from the omnidirectional refrigeration shroud, and the refrigerant in the refrigeration unit evaporates in the refrigeration fins for heat absorption.

[0018] Preferably, the zeolite molecular sieve membrane B is L-shaped and installed in the housing, with its lower part embedded in the air guide plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The automatic air pressure regulation device inside and outside the refrigerated container is equipped with a temperature regulation component. It uses a centrifugal fan to draw air in laterally from the middle of the container. After heat exchange, the air is distributed from the top, bottom, front, and back of the omnidirectional refrigeration hood. Compared with direct lateral air blowing, the circulating cold air effect is better and can quickly balance the temperature at the front and rear of the container.

[0021] 2. The automatic air pressure regulation device inside and outside the refrigerated container is equipped with air conditioning components. During refrigeration, the blower can also draw in air. After the air is drawn in and exchanges heat with the refrigeration fins, it can be sent to two sets of air conditioning components. Since the air outlet directions of the two air guides are opposite, a cold air circulation can be created at the top of the container. Combined with the omnidirectional refrigeration hood below, the air inside the container can be quickly circulated in a short time. After the machine is turned on, the entire compartment can be cooled down, and the temperature at the beginning and end can be balanced efficiently.

[0022] 3. The automatic air pressure regulation device inside and outside the refrigerated container is equipped with an air conditioning component and an air pump component. When the container detects an imbalance in the air pressure inside and outside, in order to quickly balance the air pressure, the three-way valve can be changed to allow the air pump to directly supply the air conditioning component. This can quickly extract gas from inside the container or quickly send outside gas into the container, thus achieving the effect of quickly balancing the air pressure.

[0023] 4. The automatic air pressure regulation device inside and outside the refrigerated container utilizes a zeolite molecular sieve membrane. When balancing the internal and external air pressure, it can selectively filter incoming or outgoing gases, autonomously allowing the passage of gases such as O2, N2, and CO2, achieving intelligent bidirectional gas regulation and maintaining a stable internal environment. By reducing or inhibiting the respiration of fruits and vegetables, they enter a dormant state. During dormancy, the consumption of nutrients decreases, and the rate of nutrient loss slows down over a certain period, preserving nutrients as much as possible. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of another state structure of the present invention;

[0026] Figure 3 This is a bottom view of the structure of the present invention;

[0027] Figure 4 Structural breakdown of the temperature regulation component of the present invention Figure 1 ;

[0028] Figure 5 Structural breakdown of the temperature regulation component of the present invention Figure 2 ;

[0029] Figure 6 Structural breakdown of the temperature regulation component of the present invention Figure 3 ;

[0030] Figure 7 This is a structural diagram of the refrigeration unit and temperature control component of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the air conditioning component of the present invention;

[0032] Figure 9 For the present invention Figure 8 Enlarged view of the structure at point A in the middle;

[0033] Figure 10 This is a diagram showing the internal structure of the air conditioning component of the present invention.

[0034] In the diagram: 1. Refrigeration unit; 2. Temperature control assembly; 201. Omnidirectional refrigeration hood; 202. Blower; 203. Centrifugal fan; 204. Refrigeration fins; 205. Air inlet; 206. Base; 3. Air conditioning assembly; 301. Housing; 302. Air guide plate; 303. Air duct; 304. Air supply duct; 305. Zeolite molecular sieve membrane B; 4. Air pump assembly; 401. Air pump body; 402. Zeolite molecular sieve membrane A. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0039] like Figure 1-10 As shown, an automatic air pressure regulation device for the interior and exterior of a refrigerated container includes a refrigeration unit 1, a temperature regulation component 2, an air conditioning component 3, and an air pump component 4. The temperature regulation component 2 is installed on the inner wall of the container's end. Two sets of air conditioning components 3 are installed on the inner top wall of the container, with opposite airflow directions. The temperature regulation component 2 includes an omnidirectional cooling hood 201, a blower 202, and a centrifugal fan 203. The centrifugal fan 203 draws in air from the lateral direction of the container, and after heat exchange, dissipates the cool air through the omnidirectional cooling hood 201 to the top, bottom, left, and right sides. Each air conditioning component 3 is connected to the blower 202 and the air pump component 4. The blower 202 draws in cool air from the omnidirectional cooling hood 201 and supplies it to the two air conditioning components 3 to balance the cool air inside the container. The air pump component 4 is used for intake and exhaust, achieving pressure balance inside the container and automatically sifting the gas to inhibit the respiration of fruits and vegetables.

[0040] The refrigeration unit 1 is installed outside the container, usually on the side of the container closer to the front of the vehicle. It is powered by electricity from the front of the vehicle. The refrigeration unit 1 is a complete refrigeration compressor. After compression, the refrigerant inside can exchange heat with the outside. When evaporating, the cold energy enters the temperature regulation component 2. All components in the refrigeration unit 1 are technologies well known to those skilled in the art.

[0041] One end of the temperature regulating component 2 is embedded in the side wall of the container, and its output surface is inside the container. The end of the temperature regulating component 2 inside the container is a flat rectangular structure with a thickness of about 10cm-20cm, which hardly occupies any storage space inside the container. The air conditioning component 3 is embedded in the inner top wall of the container, with its downward side inside the container. Its protruding thickness is negligible, thus avoiding occupying the storage space above.

[0042] The two sets of temperature regulating components 2 can be installed in the middle of the inner top wall of the container, or they can be set symmetrically on the left and right sides according to the center line of the inner top wall. If the container is special (long in length), it is not limited to two sets, and multiple sets can be evenly arranged on the top of the container.

[0043] The temperature control component 2, located inside the container, is equipped with a temperature / humidity sensor, as well as various gas detection sensors such as a pressure sensor and an oxygen sensor. It can convert the detection signals into electrical signals for subsequent atmosphere adjustment.

[0044] In an optional embodiment, the air pump assembly 4 includes two sets of air pump bodies 401 and a zeolite molecular sieve membrane A402. The zeolite molecular sieve membrane A402 is installed below the two sets of air pump bodies 401. The air inlet end of the air pump body 401 can be opened by changing the force of the valve to allow air to enter from the zeolite molecular sieve membrane A402, so that the gas passes through the zeolite molecular sieve membrane A402.

[0045] In this embodiment, a single air pump assembly 4 includes, but is not limited to, an air pump body 401, and also includes a protective shell. The protective shell has an air inlet on its side wall. A zeolite molecular sieve membrane A402 is installed at the bottom of the protective shell, which is also an air inlet. It has a molecular sieve or a single air inlet and is connected to the output end of the air pump body 401 through a valve. When rapid air intake is required, the air inlet is connected by the valve. At this time, the air intake does not pass through the zeolite molecular sieve membrane A402. Switching the valve can make the gas pass through the zeolite molecular sieve membrane A402 alone without passing through the air inlet.

[0046] In an optional embodiment, the air conditioning assembly 3 includes a housing 301 and an air guide plate 302. The housing 301 is installed on the top of the inner wall of the container, and the air guide plate 302 is installed on the bottom of the housing 301. The air guide plate 302 is provided with a plurality of linearly distributed air ducts 303, which are inclined. The air guide plates 302 included in the two sets of air conditioning assemblies 3 have their lower ends of the air ducts 303 facing opposite directions. It also includes two air supply pipes 304, both of which are connected to the housing 301. A zeolite molecular sieve membrane B305 is fixed in the housing 301. One air supply pipe 304 communicates with the space between the zeolite molecular sieve membrane B305 and the inner top wall of the housing 301, so as to allow gas to pass through the zeolite molecular sieve membrane B305. The other air supply pipe 304 communicates with the space between the zeolite molecular sieve membrane B305 and the air guide plate 302, so as to allow gas to pass directly through the air guide plate 302 without passing through the zeolite molecular sieve membrane B305. The air supply duct 304 is connected to the blower 202 and the air pump body 401.

[0047] In this embodiment, the cover 301 is used for installation, while the air guide plate 302 is fastened to the bottom of the cover 301, which can form a gas space between the cover 301 and the air guide plate 302. In order not to affect the storage of the container or to protect the air intake, the air supply pipe 304 can be hidden in the hollow side wall of the container.

[0048] In an optional embodiment, the output end of the blower 202 is equipped with two sets of three-way valves through a pipeline. The air supply pipe 304 is connected to the three-way valves, and the output end of the air pump body 401 is connected to the three-way valves through a pipeline. The three-way valves can switch the connection between the blower 202 and the air supply pipe 304, the connection between the air pump body 401 and the air supply pipe 304, and switch the opening and closing of the single and double air supply pipes 304.

[0049] In this embodiment, the three-way valve is not limited to a three-way valve. It is equipped with multiple solenoid valves. Each air inlet pipe is equipped with a valve at its connection point. Valves are also installed at the supply points of the blower 202 and the air pump body 401. All of the above valves are electromagnetically controlled and can be controlled according to electrical signals.

[0050] In an optional embodiment, the temperature regulating component 2 further includes cooling fins 204, which are distributed in a ring around the omnidirectional cooling shroud 201 and surround the outside of the centrifugal fan 203. The outer surface of the omnidirectional cooling shroud 201 is provided with a ring of air channels 303 that run through the inside and outside. The side of the omnidirectional cooling shroud 201 facing the inside of the container is provided with an air inlet 205. When the centrifugal fan 203 rotates, air is drawn in through the air inlet 205. After heat exchange with the cooling fins 204, the air is thrown out from the air channels 303 in the up, down, left and right directions.

[0051] In this embodiment, the cooling fins 204 are evaporators for the refrigerant. After evaporation, the refrigerant passes through the cooling fins 204 and is cooled down. The annularly distributed cooling fins 204 can work with the centrifugal fan 203 to circumferentially dissipate cold air.

[0052] In an optional embodiment, the temperature regulating assembly 2 further includes a base 206 connected to the inner wall of the container. The base 206 has a hollow structure, and a blower 202 is installed in the base 206. The air intake of the blower 202 is connected to the interior of the omnidirectional cooling hood 201 to enable the gas to exchange heat with the cooling fins 204 when the blower 202 is inlet, thereby sending the gas to the three-way valve.

[0053] In this embodiment, the base 206 penetrates the side wall of the container. Its main fixing and connection effect is that when modifying the refrigerated container in the prior art, it is only necessary to drill a hole at the end of the container and install the base 206.

[0054] In an optional embodiment, the refrigeration unit 1 is mounted on the side of the base 206 away from the omnidirectional refrigeration shroud 201, and the refrigerant in the refrigeration unit 1 evaporates in the refrigeration fins 204 for heat absorption.

[0055] In an optional embodiment, the zeolite molecular sieve membrane B305 is installed in an L-shape in the housing 301, with its lower part embedded in the air guide plate 302.

[0056] In this embodiment, the fruits and vegetables are still living organisms after harvesting, and they will undergo respiration (consuming O2 and producing CO2, ethylene, etc.) and transpiration. The key to preservation is to inhibit excessive respiration and delay aging. Both zeolite molecular sieve membranes A402 and B305 are functional preservation films made by adding ultrafine zeolite powder (nano-zeolite) to packaging plastics (such as PE and PP). These membranes themselves have the ability to adsorb ethylene and regulate gases.

[0057] The L-shaped structure of the zeolite molecular sieve membrane B305 can quickly distinguish between two different air supply pipes 304. Moreover, after the membrane is made, it is embedded in the air guide plate 302, which can make the gas sieving more accurate and avoid the problem of air leakage.

[0058] Working principle: During refrigeration, the refrigeration unit 1 cools the refrigeration fins 204 by evaporating the refrigerant, controls the centrifugal fan 203 to rotate, and the centrifugal fan 203 draws air in laterally from the middle of the container. After exchanging heat with the refrigeration fins 204, the air is discharged from the top, bottom, front, and back of the omnidirectional refrigeration hood 201, thereby quickly balancing the temperature at the front and rear of the container. At the same time as the centrifugal fan 203 cools the container, the blower 202 also starts to run in conjunction with the centrifugal fan 203. The blower 202 draws air from the position of the refrigeration fins 204. After exchanging heat with the refrigeration fins 204, the air can be sent to the two sets of air conditioning components 3 through the air supply pipe 304. The air is delivered through only one of the air supply pipes 304, so that the cold air does not pass through the zeolite molecular sieve membrane B305. Since the air outlet directions of the air guide plates 302 of the two air conditioning components 3 are opposite, a cold air circulation can be formed at the top of the container. Combined with the refrigeration of the omnidirectional refrigeration hood 201 below, the air inside the container can be quickly circulated in a short time.

[0059] When balancing the air pressure inside and outside the container: When the container detects an imbalance in the air pressure inside and outside, in order to quickly balance the air pressure, the three-way valve can be changed to allow the air pump body 401 to directly supply air conditioning component 3. When the air pump body 401 is running, it can draw air from the cover 301 through the air supply pipe 304. When quickly balancing the air pressure, the air pump body 401 is only connected to one set of air supply pipes 304, so that the ventilation does not pass through the zeolite molecular sieve membrane B305, thus quickly balancing the air pressure.

[0060] When suppressing the respiration of fruits and vegetables, another air supply duct 304 can be connected while balancing the internal and external air pressure. This duct filters the incoming and outgoing gases, allowing them to pass through zeolite molecular sieve membranes A402 and B305. The gases can selectively pass through O2, N2, CO2, and other gases, achieving intelligent bidirectional gas regulation and maintaining a stable environment within the container. By reducing or suppressing the respiration of fruits and vegetables, they enter a dormant state. During dormancy, the consumption of nutrients decreases, and the rate of nutrient loss slows down over a certain period, preserving nutrients as much as possible.

[0061] Preservation effect: Preservation time (60 days for leafy greens, 40 days for strawberries, 45 days for cherries) (edible rate > 90%); Loss rate (< 3% for high-value fresh produce); Nutritional retention rate (Vitamin C > 70% for 45-day storage).

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0063] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic pressure regulating device for the interior and exterior of a refrigerated container, comprising a refrigeration unit (1), characterized in that: It also includes a temperature control assembly (2), an air conditioning assembly (3) and an air pump assembly (4). The temperature control assembly (2) is installed on the inner wall of the end of the container. The air conditioning assembly (3) has two sets, both installed on the inner top wall of the container, and the two have opposite air outlet directions. The temperature control component (2) includes an omnidirectional cooling hood (201), a blower (202) and a centrifugal fan (203). The centrifugal fan (203) draws in air from the lateral direction of the container, and after heat exchange, it dissipates cold air through the omnidirectional cooling hood (201) to the top, bottom and left and right sides of the omnidirectional cooling hood (201). Each air conditioning component (3) is connected to a blower (202) and an air pump component (4). The blower (202) can draw in the cold air in the omnidirectional cooling hood (201) and supply it to the two air conditioning components (3) respectively to balance the cold air in the container. The air pump component (4) is used for intake and exhaust to balance the air pressure in the container and autonomously sieve the gas to inhibit the respiration of fruits and vegetables.

2. The automatic air pressure regulation device for the interior and exterior of a refrigerated container according to claim 1, characterized in that: The air pump assembly (4) includes two sets of air pump bodies (401) and a zeolite molecular sieve membrane A (402). The zeolite molecular sieve membrane A (402) is installed below the two sets of air pump bodies (401). The air inlet end of the air pump body (401) can be changed by the valve to allow air to enter from the zeolite molecular sieve membrane A (402) so that the gas passes through the zeolite molecular sieve membrane A (402).

3. The automatic air pressure regulation device for the interior and exterior of a refrigerated container according to claim 2, characterized in that: The air conditioning assembly (3) includes a cover (301) and an air guide plate (302). The cover (301) is installed on the top of the inner wall of the container, and the air guide plate (302) is installed on the bottom of the cover (301). The air guide plate (302) is provided with a number of linearly distributed air ducts (303). The air ducts (303) are inclined. The air guide plates (302) included in the two sets of air conditioning assemblies (3) have their lower ends facing opposite directions. It also includes two air supply pipes (304), both of which are connected to the casing (301). A zeolite molecular sieve membrane B (305) is fixed in the casing (301). One of the air supply pipes (304) is connected to the space between the zeolite molecular sieve membrane B (305) and the inner top wall of the casing (301) to allow gas to pass through the zeolite molecular sieve membrane B (305). The other air supply pipe (304) is connected to the space between the zeolite molecular sieve membrane B (305) and the air guide plate (302) to allow gas to pass directly through the air guide plate (302) without passing through the zeolite molecular sieve membrane B (305). The air supply pipe (304) is connected to the blower (202) and the air pump body (401).

4. The automatic air pressure regulation device for the interior and exterior of a refrigerated container according to claim 3, characterized in that: The blower (202) has two sets of three-way valves installed at its output end through a pipeline. The air supply pipe (304) is connected to the three-way valve. The air pump body (401) is connected to the three-way valve through a pipeline. The three-way valve can switch the blower (202) connected to the air supply pipe (304), the air pump body (401) connected to the air supply pipe (304), and switch the opening and closing of the single and double air supply pipes (304).

5. The automatic air pressure regulation device for the interior and exterior of a refrigerated container according to claim 4, characterized in that: The temperature regulating component (2) also includes cooling fins (204). The cooling fins (204) are distributed in a ring around the omnidirectional cooling shroud (201) and surround the outside of the centrifugal fan (203). The outer surface of the omnidirectional cooling shroud (201) is provided with a ring of air grooves (303) that run through the inside and outside. The side of the omnidirectional cooling shroud (201) facing the inside of the container is provided with an air inlet (205). When the centrifugal fan (203) rotates, air is drawn in through the air inlet (205). After the air is heated by the cooling fins (204), it is thrown out from the air grooves (303) in the up, down, left and right directions.

6. The automatic air pressure regulation device for the interior and exterior of a refrigerated container according to claim 5, characterized in that: The temperature regulating component (2) also includes a base (206) connected to the inner wall of the container. The base (206) has a hollow structure inside. A blower (202) is installed in the base (206). The air intake of the blower (202) is connected to the interior of the omnidirectional cooling hood (201) to realize that when the blower (202) is inlet, the gas exchanges heat with the cooling fins (204) and is then sent to the three-way valve.

7. The automatic air pressure regulation device for the interior and exterior of a refrigerated container according to claim 6, characterized in that: The refrigeration unit (1) is installed on the side of the base (206) away from the omnidirectional refrigeration shroud (201), and the refrigerant in the refrigeration unit (1) evaporates in the refrigeration fins (204) for heat absorption.

8. The automatic air pressure regulating device for the interior and exterior of a refrigerated container according to claim 3, characterized in that: The zeolite molecular sieve membrane B (305) is L-shaped and installed in the housing (301), with its lower part embedded in the air guide plate (302).

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