An air-conditioned fresh-keeping storehouse

Abstract

The utility model relates to refrigeration technology, gas component regulation technology especially, is a kind of air-conditioning fresh-keeping storehouse, using refrigeration system to give cold storehouse cooling, using the nitrogen in release nitrogen cylinder and the carbon dioxide gas in carbon dioxide cylinder, discharge air in cold storehouse, to reduce the oxygen concentration in cold storehouse, improve the concentration of carbon dioxide gas in cold storehouse, and by electrical control system relevant sensor automatic real-time automatic detection temperature in cold storehouse, various gas component proportion, automatically control the operating state of refrigeration system, gas regulation system, to realize the accurate regulation control to temperature in cold storehouse, gas component proportion.Compared with prior art, the utility model has small investment, low use cost, and completely does not exist the energy consumption problem caused by fuel combustion;It can realize the temperature in cold room, oxygen gas concentration, carbon dioxide gas concentration regulation and control precision.

Description

Technical Field

[0001] This utility model relates to refrigeration technology and gas composition regulation technology, and in particular to a controlled atmosphere storage facility. Background Technology

[0002] It is well known that adjusting and controlling the gas composition in which cold chain preserved fruits and vegetables are stored can effectively extend their shelf life. In fact, controlled atmosphere storage in cold chain is rarely used in practice. The reasons are as follows: first, the investment cost of mechanical controlled atmosphere devices is high; second, the single unit capacity is large, and there are no mechanical controlled atmosphere devices suitable for small and medium-sized cold chain storage; and third, the error in adjusting and controlling the gas composition during use is relatively large.

[0003] Therefore, if we can overcome the technical bottlenecks and develop a precision controlled atmosphere cold chain storage facility with low investment costs, precise adjustment and control of gas composition ratios, and complete suitability for large, medium, and small-sized cold chain fruit and vegetable storage facilities, we can significantly expand and even popularize the application scope of controlled atmosphere cold chain storage facilities for fruits and vegetables. This is of great significance for effectively extending the shelf life of fruits and vegetables, realizing off-peak sales, sales in different locations, and sales in different seasons, enhancing the economic value of fruits and vegetables, and significantly reducing the spoilage rate of fruits and vegetables. Utility Model Content

[0004] This invention provides a controlled atmosphere storage facility that can regulate and control the gas composition of cold-chain fresh fruits and vegetables. The technical approach involves using a refrigeration system to cool the cold storage, releasing nitrogen from nitrogen cylinders and carbon dioxide from carbon dioxide cylinders to expel air from the cold storage, thereby reducing the oxygen concentration and increasing the carbon dioxide concentration. An electrical control system with relevant sensors automatically and in real-time detects the temperature and the proportions of various gas components within the cold storage, automatically controlling the operation of the refrigeration and gas regulation systems to achieve precise regulation and control of the temperature and gas composition ratios within the cold storage.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows: This type of controlled atmosphere storage includes a warehouse divided into a cold storage room and an equipment room. The equipment room is equipped with a refrigeration system to provide a cold source for the cold storage room. The nitrogen filling system includes a nitrogen cylinder, a nitrogen pressure reducing valve directly connected to the nitrogen cylinder, and the outlet of the nitrogen pressure reducing valve connected to the inlet of a solenoid valve through a nitrogen pipeline. The nitrogen discharge pipe connected to the solenoid valve passes through the upper part of the wall between the equipment room and the cold room and enters the cold room. The carbon dioxide filling system includes a carbon dioxide cylinder, a carbon dioxide pressure reducing valve directly connected to the carbon dioxide cylinder, and the outlet of the carbon dioxide pressure reducing valve connected to the inlet of solenoid valve two through a carbon dioxide pipeline. The carbon dioxide discharge pipe connected to solenoid valve two passes through the upper part of the wall between the equipment room and the cold room and enters the cold room. The exhaust system includes an electric valve, an exhaust manifold, and an exhaust inlet pipe. The exhaust manifold is connected to the electric valve at its outlet end and passes through one side wall of the cold room to enter the cold room and connect to the exhaust inlet pipe, which is located on both sides of the lower part of the cold room and is in a horizontal "U" shape. The exhaust inlet pipe has air inlets on both sides and at the bottom to facilitate the uniform discharge of gas in the cold room.

[0006] Furthermore, it also includes The ventilation system includes an exhaust fan, an electric valve 2, a connecting pipe 1 that connects the exhaust fan and the electric valve 2, and a ventilation pipe that connects to the outlet of the electric valve 2. The ventilation pipe passes through one side wall of the cold room and enters the cold room.

[0007] Furthermore, it also includes The ethylene gas removal system includes a fan, an electric valve three, a connecting pipe two connecting the fan and the electric valve three, a main removal pipe connected to the outlet of the electric valve three and passing through one side wall of the cold room to enter the cold room, and removal branch pipes connected to the main removal pipe and fixed on both sides of the top of the cold room. Several ethylene gas intake holes are opened on the removal branch pipes to facilitate the removal of ethylene gas in the cold room.

[0008] Furthermore, it also includes The electrical control system consists of three parts: a main control unit, a data acquisition unit, and an execution unit. The microcomputer controller of the main control unit consists of an input module, a data processing module, an output module, and an operation display screen; The data acquisition unit includes a temperature sensor, an ethylene gas concentration sensor, an oxygen concentration sensor, a carbon dioxide gas concentration sensor, and a gas pressure sensor placed in the cold room, as well as an exhaust pressure sensor and an exhaust temperature sensor placed on the exhaust pipe of the compressor in the refrigeration system, and an intake pressure sensor and an intake temperature sensor placed on the intake pipe of the compressor. All the sensors of the data acquisition components are connected to the microcomputer controller input module and the operation display screen via data cables. The execution unit includes contactors, relays, and circuit breakers. All execution elements and the microcomputer controller of the main control unit are placed in the electrical control box. The operation display screen is placed in a position that is easy to observe and operate. The output module and all execution elements, as well as the execution elements and the electrical equipment and components of the refrigeration system, nitrogen charging system, carbon dioxide charging system, exhaust system, and ventilation system are connected by wires and cables to form a complete regulation and control circuit.

[0009] Furthermore, the cold room consists of a six-sided enclosure structure with heat insulation and moisture-proof functions, one of which has an access door on one of the enclosure walls.

[0010] Furthermore, the refrigeration system comprises a compressor, condenser, gas-liquid separator, and dryer filter placed in the equipment room; a cooler and expansion valve placed in the cold room; an exhaust pipe connecting the compressor exhaust port and the condenser inlet; a high-pressure liquid pipe connecting the condenser outlet and the dryer filter inlet; a high-pressure liquid pipe connecting the dryer filter outlet and the expansion valve inlet; a low-pressure liquid pipe connecting the expansion valve outlet and the cooler inlet; a low-pressure gas pipe connecting the cooler outlet and the gas-liquid separator inlet; and a compressor suction pipe connecting the gas-liquid separator outlet and the compressor inlet. The high-pressure liquid pipe and the low-pressure gas pipe pass through the wall of the cold room near the equipment room, and the refrigerant flows inside the refrigeration system.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects: 1. Low investment, low operating costs, and no energy consumption issues caused by fuel combustion; 2. The temperature, oxygen concentration, and carbon dioxide concentration in the cold room are precisely regulated and controlled.

[0012] 3. It has a high degree of intelligence and no personnel are required to operate it after it is put into operation. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 Sectional view at point AA.

[0015] Figure 3 for Figure 1 Sectional view at point BB.

[0016] Figure 4 This is a schematic diagram of the refrigeration system of this utility model. Detailed Implementation

[0017] The preferred embodiments of the present invention and examples of modifications thereof are described in detail below with reference to the accompanying drawings, by way of illustration rather than limitation of the scope of protection claimed by the present invention.

[0018] like Figure 1-4 The diagram shown is a structural schematic of a controlled atmosphere storage unit according to this utility model. It mainly includes: Warehouse 10 is divided into a cold room 101 for storage and preservation and an equipment room 102 for installing equipment and electrical control boxes. The cold room 101 consists of a six-sided enclosure structure with heat preservation and moisture protection functions. One of the enclosure walls is equipped with an entrance and exit door 103. The side of the cold room 101 closest to the equipment room 102 has a wall with heat preservation and moisture protection functions. The refrigeration pipes of the refrigeration system 20, the gas pipes of the nitrogen charging system 30, carbon dioxide charging system 40, exhaust system 50, ventilation system 60, and ethylene gas removal system 70, as well as the wires and cables of the electrical control system 80 pass through this wall and enter the cold room 101.

[0019] Key points such as Figure 4 As shown, the refrigeration system 20 provides a cold source for the cold room 101, including a compressor 201, condenser 202, gas-liquid separator 205, and dryer filter 206 placed in the equipment room 102; an evaporator 204 and a throttle valve 203 placed in the cold room 101; an exhaust pipe 207 connecting the exhaust port of the compressor 201 to the inlet of the condenser 202; a high-pressure liquid pipe 208 connecting the outlet of the condenser 202 to the inlet of the dryer filter 206; and a high-pressure liquid pipe 208 connecting the outlet of the dryer filter 206 to the inlet of the throttle valve 203. The complete refrigeration system consists of a high-pressure liquid line 209, a low-pressure liquid line 210 connecting the outlet of the throttle valve 203 to the inlet of the evaporator 204, a low-pressure gas line 211 connecting the outlet of the evaporator 204 to the inlet of the gas-liquid separator 205, and a compressor suction line 212 connecting the outlet of the gas-liquid separator 205 to the inlet of the compressor 201. The high-pressure liquid line 209 and the low-pressure gas line 211 pass through the wall of the cold room 101 near the equipment room 102, and the refrigerant flows inside the refrigeration system.

[0020] The nitrogen filling system 30 includes a nitrogen cylinder 301, a nitrogen pressure reducing valve 302 directly connected to the nitrogen cylinder 301, the outlet of the nitrogen pressure reducing valve 302 being connected to the inlet of a solenoid valve 303 via a nitrogen pipeline 304, and a nitrogen discharge pipe 305 connected to the solenoid valve 303 passing through the upper part of the wall between the equipment room 102 and the cold room 101 and entering the cold room 101.

[0021] The carbon dioxide filling system 40 includes a carbon dioxide cylinder 401, a carbon dioxide pressure reducing valve 402 directly connected to the carbon dioxide cylinder 401, the outlet of the carbon dioxide pressure reducing valve 402 being connected to the inlet of a second solenoid valve 403 via a carbon dioxide pipeline 404, and a carbon dioxide emission pipe 405 connected to the second solenoid valve 403 passing through the upper part of the wall between the equipment room 102 and the cold room 101 and entering the cold room 101.

[0022] In another preferred embodiment, the exhaust system 50 includes an electric valve 501, an exhaust manifold 502, and an exhaust inlet pipe 503. The exhaust manifold 502 is connected to the electric valve 501 at its outlet end, and the other end passes through one side wall of the cold room and enters the cold room 101, where it is connected to the exhaust inlet pipe 503, which is located on both sides of the lower part of the cold room 101 and is in a horizontal "U" shape. The exhaust inlet pipe 503 has air inlets on both sides and at the bottom to facilitate the uniform discharge of gas in the cold room 101.

[0023] In another preferred embodiment, the ventilation system 60 includes an exhaust fan 601, an electric valve 602, a connecting pipe 603 connecting the exhaust fan 601 and the electric valve 602, and a ventilation pipe 604 connected to the outlet of the electric valve 602. The ventilation pipe 604 passes through one side wall of the cold room 101 and enters the cold room.

[0024] In another preferred embodiment, the system includes a fan 701, an electric valve 702, a connecting pipe 703 connecting the fan 701 and the electric valve 702, a main purging pipe 704 connected to the outlet of the electric valve 702 and passing through one side wall of the cold room 101 to enter the cold room, and purging branch pipes 705 connected to the main purging pipe 704 and fixed on both sides of the top of the cold room 101. The purging branch pipes 705 have several ethylene gas intake holes to facilitate the removal of ethylene gas in the cold room 101. The purging branch pipes 705 are also in a transverse "U" shape and are arranged alternately with the exhaust and intake pipes 503.

[0025] The electrical control system 80 of this utility model mainly includes: It consists of three parts: the main control unit, the data acquisition unit, and the execution unit.

[0026] The microcomputer controller of the main control unit consists of an input module, a data processing module, an output module, and an operation display screen 811; The data acquisition unit includes a temperature sensor 801, an ethylene gas concentration sensor 802, an oxygen concentration sensor 803, a carbon dioxide gas concentration sensor 804, and a gas pressure sensor 809 placed in the cold room 101; an exhaust pressure sensor 805 and an exhaust temperature sensor 806 placed on the exhaust pipe 207 of the compressor 201 of the refrigeration system 20; and an intake pressure sensor 807 and an intake temperature sensor 808 placed on the intake pipe 212 of the compressor. All the sensors of the data acquisition element are connected to the microcomputer controller input module and the operation display screen 811 via data cables. The actuator unit includes contactors, relays, and circuit breakers. All actuators and the microcomputer controller of the main control unit are housed in the electrical control box 810. The operation display screen 811 is placed in a convenient location for observation and operation. The output module and all actuators, as well as the actuators and the electrical equipment and components of the refrigeration system 20, nitrogen charging system 30, carbon dioxide charging system 40, exhaust system 50, and ventilation system 60, are connected by wires and cables to form a complete regulation and control circuit. When the electrical control system 80 is working, the data collected by all sensors of the data acquisition element is transmitted in real time to the input module of the microcomputer controller through the data line. After receiving the data, the input module transmits it to the data processing module in real time. The data processing module performs calculations and comparisons on the received data in real time, and according to the calculation and comparison results, it instructs the relevant execution elements to open or close through the output module, thereby controlling the operation or shutdown of the electrical equipment and components of the refrigeration system 20, nitrogen charging system 30, carbon dioxide charging system 40, exhaust system 50, ventilation system 60, and ethylene gas removal system 70. This achieves automatic and precise adjustment and control of the temperature, gas composition concentration, and operating status of the refrigeration system in the cold chain controlled atmosphere storage.

[0027] The working principle of this controlled atmosphere storage facility will be explained in detail below with reference to the attached diagram.

[0028] When the equipment is first put into use, the start button of the storage and preservation cold room 101 on the operation display screen 811 is pressed. The temperature sensor 801 of the cold room 101 detects that the temperature value inside the cold room 101 is higher than the set temperature value of the cold room 101. The automatic control system 80 immediately commands the contactors of the condenser 202, evaporator 204 and compressor 201 of the refrigeration system 20 to close in sequence. The refrigerant gas in the evaporator 204, under the suction action of the compressor 201, enters the gas-liquid separator 205 through the low-pressure gas pipeline 211. After separating the lubricating oil and refrigerant liquid carried with the return gas, the gas is drawn into the compressor 201 through the suction pipeline 212. After the low-pressure refrigerant gas is drawn into the compressor 201, it is compressed into high-pressure refrigerant gas by consuming energy. It enters the condenser 202 through the exhaust pipeline 207 of the compressor 201. The high-pressure refrigerant gas transfers heat to the cooling medium in the condenser 202. After condensation, the refrigerant itself condenses into a high-pressure refrigerant liquid. It then enters the dryer filter 206 through the high-pressure liquid pipeline 208 to remove impurities and moisture from the refrigerant. After that, it enters the throttle valve 203 through the high-pressure liquid pipeline 209. The high-pressure refrigerant liquid is throttled and depressurized by the throttle valve 203 into a low-pressure refrigerant gas. It then enters the evaporator 204 through the low-pressure liquid pipeline 210. The low-pressure refrigerant liquid absorbs heat from the cold room 101 in the evaporator 204 and evaporates into a low-pressure refrigerant gas, which is then drawn into the compressor. The refrigerant continuously circulates and absorbs heat in the evaporator 204 of the refrigeration system 20, thereby continuously cooling the cold room 101. When the temperature detected by the temperature sensor 801 in the cold room 101 reaches the lower limit of the set value, the control program of the electrical control system 80 automatically commands the contactors of the electrical actuators of the compressor 201, evaporator 204, and condenser 202 to disconnect, and the refrigeration system stops working.

[0029] At this point, open the receiving door 103 of cold room 101, move the fruits and vegetables that need to be stored and preserved into cold room 101, close the door 103, and then press the atmosphere control button on the touch screen. The input module of the automatic control system 80 receives the oxygen concentration sensor 803 placed in cold room 101, which detects that the oxygen concentration in cold room 101 is higher than the set value. Then, the data processing module automatically controls the contactors of the solenoid valve 303 of the nitrogen filling system 30 and the electric valve 501 of the exhaust system 50 to close through the output module. Then, the nitrogen in the nitrogen cylinder 301 is depressurized by the nitrogen pressure reducing valve 302 and passes through the nitrogen pipeline 304 and the solenoid valve 303 in sequence. 3. Nitrogen gas enters the cold room 101 through the nitrogen discharge pipe 305. As nitrogen gas in the nitrogen cylinder 301 is continuously injected into the cold room 101, the pressure in the cold room 101 increases. The air in the cold room 101 is then discharged to the ambient atmosphere through the horizontal "U"-shaped exhaust inlet pipe 503, exhaust manifold 502, and electric valve 501. When the oxygen concentration in the cold room 101 detected by the oxygen concentration sensor 803 reaches the upper limit of the set value, the data processing module of the electrical control system 80 automatically instructs the contactor of the solenoid valve 303 of the nitrogen filling system 30 to disconnect, stopping the injection of nitrogen gas into the cold room 101.

[0030] When the carbon dioxide concentration sensor 804 in the cold room 101 detects that the carbon dioxide concentration in the cold room 101 is lower than the set lower limit, the electrical control system 80 automatically commands the contactor of the solenoid valve 403 of the carbon dioxide filling system 40 to close. Then, the carbon dioxide in the carbon dioxide cylinder 401 is depressurized by the pressure reducing valve 402 and enters the cold room 101 in sequence through the carbon dioxide gas pipeline 404, the solenoid valve 403, and the carbon dioxide discharge pipe 405. When the carbon dioxide concentration sensor 804 in the cold room 101 detects that the carbon dioxide concentration in the cold room 101 reaches the set value, the data processing module of the electrical control system 80 automatically commands the contactor of the solenoid valve 403 of the carbon dioxide filling system 40 to open through the data output module.

[0031] When the gas pressure sensor 809 in the cold room 101 detects that the gas pressure in the cold room 101 has reached the set value, the data processing module of the electrical control system 80 automatically commands the contactor of the electric valve 501 of the exhaust system 50 to disconnect through the data output module, so as to ensure the air pressure inside and outside the cold room 101 is balanced, thereby preventing the air inside the cold room from exchanging with the outside air.

[0032] During the storage and preservation of fruits and vegetables, respiration consumes oxygen in the cold room 101 while releasing an equal amount of carbon dioxide gas. Therefore, over time, the oxygen concentration in the cold room 101 decreases, while the carbon dioxide concentration increases. When the oxygen concentration sensor 803 detects that the oxygen concentration in the cold room 101 has decreased to the lower limit set by the electrical control program, in a preferred embodiment, the data processing module of the electrical control system 80 immediately controls the contactors of the fan 601 of the ventilation system 60, the electric air valve 602, and the electric valve 501 of the exhaust system 50 to close via an output module command. At this time, the fan 601 of the ventilation system 60 draws in ambient air, which is then supplied to the cold room 101 via connecting pipe 603, electric valve 602, and ventilation pipe 604. Ambient air enters the cold room through the ventilation system 50. When gas enters the cold room 101, the gas pressure inside the cold room 101 increases. Since the intake pipe 503 of the exhaust system 50 is located in the lower part of the cold room 101, the carbon dioxide gas inside the cold room 101 is discharged into the ambient atmosphere in sequence through the exhaust intake pipe 503, the exhaust manifold 502, and the electric valve 501 under the action of the gas pressure inside the cold room 101. When the oxygen concentration sensor 803 detects that the oxygen concentration inside the cold room 101 reaches the set value, the data processing module of the electrical control system 80 immediately controls the contactor of the fan 601 and the electric valve 602 of the ventilation system 60 to disconnect through the output module command. When the gas pressure sensor 809 detects that the gas pressure in the cold room 101 drops to the set value, the data processing module of the electrical control system 80 immediately controls the contactor of the electric valve 501 of the exhaust system 50 to disconnect through the output module command.

[0033] During the storage and preservation of some fruits and vegetables, due to their physiological mechanisms, a certain amount of ethylene gas will decompose. Ethylene gas is a natural ripening agent with a strong ripening effect. Therefore, when the ethylene concentration sensor 802 in the cold room 101 detects that the ethylene gas concentration in the cold room 101 reaches the set concentration value to be controlled, the data processing module of the electrical control system 80 immediately sends an instruction through the output module to close the relevant contactors of the fan 701, electric valve 702 of the ethylene gas removal system 70, and the solenoid valve 303 of the nitrogen charging system 30. At this time, under the action of the fan, the ethylene gas in the cold room 101 enters the removal branch pipe 705 through the air inlets set on both sides of the transverse "U" pipe, and then passes through the removal main pipe in sequence. 704, electric valve 702, and connecting pipe 703 are discharged into the ambient atmosphere by fan 701. When ethylene concentration sensor 802 detects that the ethylene concentration in cold room 101 has dropped to the set value, the data processing module of electrical control system 80 immediately commands the contactors of fan 701 and electric valve 702 of ethylene gas removal system 70 to disconnect through the output module, and the ethylene gas removal in cold room 101 is completed. At this time, nitrogen charging system 30 continues to charge nitrogen into cold room. When gas pressure sensor 809 in cold room 101 detects that the gas pressure in cold room 101 has reached the set value, the data processing module of electrical control system 80 immediately commands the contactors of fan 701 and electric valve 702 of ethylene gas removal system 70 to disconnect through the output module.

[0034] This enables precise adjustment and control of the temperature, gas composition, gas pressure, and operating status of the refrigeration system within the cold room 101.

[0035] Therefore, the controlled atmosphere storage provided by this utility model has the following advantages: 1. Low investment, low operating costs, and no energy consumption issues caused by fuel combustion; 2. The temperature, oxygen concentration, and carbon dioxide concentration in the cold room are precisely regulated and controlled.

[0036] 3. It has a high degree of intelligence and no personnel are required to operate it after it is put into operation.

[0037] Although preferred embodiments of the present invention have been described above by way of example, the scope of protection of the present invention is not limited to the above description, but is defined by all the technical features given in the appended claims and their equivalents. It will be understood by those skilled in the art that any modifications and variations may still fall within the scope of protection of the claims of the present invention without departing from the spirit and essence of the teachings of the present invention.

Claims

1. A controlled atmosphere storage facility, comprising a warehouse (10) divided into a cold storage room (101) and an equipment room (102), wherein the equipment room (102) is equipped with a refrigeration system (20) to provide a cold source for the cold storage room (101), characterized in that, Also includes The nitrogen filling system (30) includes a nitrogen cylinder (301), a nitrogen pressure reducing valve (302) directly connected to the nitrogen cylinder (301), the outlet of the nitrogen pressure reducing valve (302) being connected to the inlet of a solenoid valve (303) via a nitrogen pipeline (304), and a nitrogen discharge pipe (305) connected to the solenoid valve (303) passing through the upper part of the wall between the equipment room (102) and the cold room (101) and entering the cold room (101). The carbon dioxide filling system (40) includes a carbon dioxide cylinder (401), a carbon dioxide pressure reducing valve (402) directly connected to the carbon dioxide cylinder (401), the outlet of the carbon dioxide pressure reducing valve (402) being connected to the inlet of solenoid valve two (403) through a carbon dioxide pipeline (404), and a carbon dioxide discharge pipe (405) connected to solenoid valve two (403) passing through the upper part of the wall between the equipment room (102) and the cold room (101) and entering the cold room (101). The exhaust system (50) includes an electric valve (501), an exhaust manifold (502), and an exhaust inlet pipe (503). The exhaust manifold (502) is connected to the electric valve (501) at its outlet end, and the other end passes through one side wall of the cold room to enter the cold room (101) and is connected to the exhaust inlet pipe (503) which is located on both sides of the lower part of the cold room (101) and is in a horizontal "U" shape. The exhaust inlet pipe (503) has air inlets on both sides and at the bottom to facilitate the uniform discharge of gas in the cold room (101).

2. The controlled atmosphere storage facility according to claim 1, characterized in that, Also includes The ventilation system (60) includes an exhaust fan (601), an electric valve (602), a connecting pipe (603) connecting the exhaust fan (601) and the electric valve (602), and a ventilation pipe (604) connected to the outlet of the electric valve (602). The ventilation pipe (604) passes through one side wall of the cold room (101) and enters the cold room.

3. A controlled atmosphere storage facility according to claim 1, characterized in that, Also includes The ethylene gas removal system (70) includes a blower (701), an electric valve three (702), a connecting pipe two (703) connecting the blower (701) and the electric valve three (702), a main removal pipe (704) connected to the outlet of the electric valve three (702) and passing through one side wall of the cold room (101) into the cold room, and removal branch pipes (705) connected to the main removal pipe (704) and fixed on both sides of the top of the cold room (101). Several ethylene gas suction holes are opened on the removal branch pipes (705) to facilitate the removal of ethylene gas in the cold room (101).

4. A controlled atmosphere storage facility according to claim 1, characterized in that, Also includes The electrical control system (80) consists of three parts: a main control unit, a data acquisition unit, and an execution unit. The microcomputer controller of the main control unit consists of an input module, a data processing module, an output module, and an operation display screen (811); The data acquisition unit includes a temperature sensor (801), an ethylene gas concentration sensor (802), an oxygen concentration sensor (803), a carbon dioxide gas concentration sensor (804), and a gas pressure sensor (809) placed in the cold room (101), as well as an exhaust pressure sensor (805) and an exhaust temperature sensor (806) placed on the exhaust pipe (207) of the compressor (201) of the refrigeration system (20), and an intake pressure sensor (807) and an intake temperature sensor (808) placed on the intake pipe (212) of the compressor. All the sensors of the data acquisition elements are connected to the microcomputer controller input module and the operation display screen (811) through data lines. The execution unit includes contactors, relays, and circuit breakers. All execution elements and the microcomputer controller of the main control unit are placed in the electrical control box (810). The operation display screen (811) is placed in a position that is easy to observe and operate. The output module and all execution elements, as well as the execution elements and the electrical equipment and components of the refrigeration system (20), nitrogen charging system (30), carbon dioxide charging system (40), exhaust system (50), and ventilation system (60), are connected by wires and cables to form a complete regulation and control circuit.

5. A controlled atmosphere storage facility according to claim 1, characterized in that, The cold room (101) consists of a six-sided enclosure structure with heat insulation and moisture-proof functions, and one of the enclosure walls is equipped with an access door (103).

6. A controlled atmosphere storage facility according to claim 1, characterized in that, The refrigeration system (20) includes a compressor (201), a condenser (202), a gas-liquid separator (205), and a dryer filter (206) located in the equipment room (102); an evaporator (204) and a throttle valve (203) located in the cold room (101); an exhaust pipe (207) connecting the exhaust port of the compressor (201) to the inlet of the condenser (202); a high-pressure liquid pipe (208) connecting the outlet of the condenser (202) to the inlet of the dryer filter (206); and a high-pressure liquid pipe connecting the outlet of the dryer filter (206) to the inlet of the throttle valve (203). The complete refrigeration system consists of two pipelines: the second pipeline (209), the first low-pressure liquid pipeline (210) connecting the outlet of the throttle valve (203) to the inlet of the evaporator (204), the second low-pressure gas pipeline (211) connecting the outlet of the evaporator (204) to the inlet of the gas-liquid separator (205), and the compressor suction pipeline (212) connecting the outlet of the gas-liquid separator (205) to the inlet of the compressor (201). The second high-pressure liquid pipeline (209) and the second low-pressure gas pipeline (211) pass through the wall of the cold room (101) near the equipment room (102), and the refrigerant flows inside the refrigeration system.

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