CN112971181B - Kiwi fruit oxygenation ripening device and operation method thereof - Google Patents

Abstract

The invention discloses an oxygenation ripening device for kiwi fruits and an operation method thereof, wherein the oxygenation ripening device comprises an outer box body, an equipment cabin and a ripening box, the outer box body is an integral shell, and the equipment cabin and the ripening box are separated by an outer partition plate; the equipment cabin comprises a refrigeration compressor, an oxygen generator, a water tank, a water pump and a control box, the ripening compartment comprises a storage area, an air suction area, an air return area, an air inlet area and a compartment door, and the storage area and the air return area are separated by an inner partition plate. The invention also provides an operation method of the kiwi fruit oxygenation and ripening device. The device can adjust the temperature and humidity of the compartment body, control the oxygen concentration, effectively regulate and control the ripening speed and the ripening degree of the kiwi fruits, realize high-oxygen ripening of the kiwi fruits after being taken out of a warehouse, adjust the temperature gradient of the air inlet and the air outlet, control the precooling speed in the fruit cooling process, realize quick temperature difference precooling before the kiwi fruits are put in the warehouse, avoid the use of exogenous hormones of the kiwi fruits, and be suitable for quick treatment after large-scale kiwi fruits are picked.

Description

A device for increasing oxygenation and accelerating ripening of kiwi fruit and its operation method

technical field

The invention belongs to the technical field of kiwifruit ripening devices, and relates to a kiwifruit aeration and ripening device and an operation method thereof. A van-type kiwifruit post-harvest treatment device for controlled ripening with high oxygen.

Background technique

Kiwifruit is a typical climacteric fruit. After-ripening of the fruit runs through the whole process of post-harvest transportation, storage, sales and consumption. To obtain good nutritional quality and edible appearance, it is necessary to effectively control the temperature and humidity during the entire post-ripening physiological process. , CO2 concentration and other factors. However, due to the long post-ripening process of kiwifruit and the large uncertainty in the time period from shipment from low-temperature cold storage to consumption by consumers, in order to ensure sales quality, most of the kiwifruit purchased by consumers are not fully post-ripened, and the fruit is high in hardness. Not for immediate consumption. At the same time, since part of the physiological process of fruit ripening is completed in the links of transportation, supermarkets and consumption, environmental factors are in an uncontrollable state, and the fruit quality is difficult to meet expectations and the taste is poor. The process of rapid pre-cooling before storage, storage during production in cold storage, and rapid ripening after delivery can effectively enhance the controllability of the post-ripening process of kiwifruit.

Post-harvest pre-cooling can reduce the respiration intensity and physiological metabolism level of kiwi fruit, which is beneficial to the healing of the stalk and facilitates long-term storage. At present, the post-harvest pre-cooling of kiwi fruit is to put the post-harvest kiwi fruit in a cool place for 2-3 days to remove the heat in the field. It leads to the invasion of microorganisms from the fruit stalk and increases the fruit rot rate; second, it cannot guarantee that the temperature of the fruit core will drop to the expected requirement. Therefore, it is necessary to design a device for rapid post-harvest pre-cooling to improve the cooling rate and uniformity of post-harvest fruit cooling and ensure the uniform physiological state of the stored fruit.

Exogenous ethylene is a synthetic plant hormone that can accelerate the post-ripening softening of kiwi fruit. At present, the effect of exogenous ethylene to rapidly ripen kiwifruit is affected by fruit variety, maturity, treatment time, treatment temperature and ethylene concentration, etc., and it is difficult to match the internal ripening physiology of the fruit. Excessive use of exogenous ethylene leads to residues and overripe kiwifruit , not only affect the quality of the fruit, shorten the shelf life, bring economic losses to dealers, but also affect the eating experience of consumers. Adjusting the oxygen concentration in the environment can affect the respiration, ethylene synthesis and energy charge changes of kiwifruit fruit, and then regulate the rate of endogenous ethylene production, build a post-ripening environment driven by the internal drive of the fruit, realize the original metabolism of color, aroma, and maintain the original quality of the fruit and flavor. Hyperoxia treatment is beneficial to maintain a high level of vitamins, ascorbic acid and lipoxygenase. At the same time, it can avoid anaerobic respiration of fruits and vegetables and reduce the production and accumulation of odorous substances. It is a green, natural and residue-free ripening method. In line with the green, healthy and safe consumption concept. Therefore, it is necessary to design a green, clean, and controllable high-oxygen rapid ripening device to increase the controllability of the post-ripening speed and post-ripening degree of kiwi fruit, and to achieve the matching of kiwi post-ripening time and sales cycle. It not only ensures that dealers can ripen and market kiwifruit at any time according to market demand, but also ensures that the kiwifruit purchased by consumers is in an edible, ready-to-eat, and high-quality food state.

Contents of the invention

The purpose of the present invention is to provide a kiwifruit aerobic ripening device and its operating method. The device can not only adjust the temperature and humidity of the compartment, but also control the oxygen concentration, so as to realize the effective regulation and control of the kiwifruit ripening speed and ripening degree, and avoid the occurrence of kiwifruit accidents. It is suitable for large-scale ripening of kiwi fruit. In addition, by adjusting the temperature gradient of the inlet and outlet air outlets and controlling the pre-cooling speed during the fruit cooling process, it is also possible to achieve rapid temperature-controlled pre-cooling of kiwifruit before storage.

Its technical scheme is as follows:

A kiwifruit aerobic ripening device, comprising three parts: an outer box body, an equipment cabin and a ripening box, the outer box body is an integral shell, and the equipment cabin and the ripening box are separated by an outer partition. The equipment compartment includes a refrigeration compressor, an oxygen generator, a water tank, a water pump, and a control box. The ripening compartment includes five parts: a storage area, an air suction area, an air return area, an air intake area, and a compartment door. The storage area and the return air area are separated by an inner partition, and the suction area includes a lower partition, a suction fan, a suction pipe, a suction partition, an outlet air pressure sensor, an outlet oxygen concentration sensor, and an outlet temperature and humidity sensor. Sensors, the return air area includes oxygen nozzles, humidification nozzles, heaters, and the air intake area includes heat exchange fans, heat exchangers, pressure fans, top partitions, inlet air pressure sensors, inlet oxygen concentration sensors, inlet Temperature and humidity sensor. The storage area is located in the center of the ripening box, the lower partition is used as the bottom plate of the storage area, the suction area is located below the storage area, the air intake area is located above the storage area, and the return air area is located at the storage area. inside the storage area, and the compartment door is located outside the storage area.

Further, the air return area is located between the storage area and the equipment cabin, and is composed of an outer box, an outer partition and an inner partition. Three suction fans are installed at the bottom, and the air outlet direction is upward, and four heaters are fixed on the outside. Between the partition and the inner partition, it is located at one-third of the total height of the return air area. Both the oxygen nozzle and the humidification nozzle are installed on the outer partition, and the position is lower than the heater. The humidification nozzle is closer to the top, and the heat exchange fan It is fixed on the top of the inner partition and connected with the air inlet of the heat exchanger.

Further, at the intersection of the air inlet area and the inner partition, a heat exchanger is installed through an opening, and the outlet of the heat exchange fan is connected to the heat exchanger, and 8 pressure fans are evenly installed on the top partition. The upper surface of the top partition is respectively equipped with an inlet air pressure sensor, an inlet oxygen concentration sensor, and an inlet temperature and humidity sensor. The inlet air pressure sensor is located in the middle of the top partition, the inlet oxygen concentration sensor is close to the air outlet of the heat exchanger, and the inlet temperature and humidity sensor Near the compartment door.

Further, the suction area includes three suction pipes and three partitions, which evenly divide the suction area below the lower partition into 8 suction areas. The suction pipe is a rectangular hollow steel pipe. Eight rectangular openings are evenly opened on both sides of the middle suction pipe, and 4 rectangular openings are evenly arranged on the inner sides of the suction pipe on both sides of the car body to form each separated suction pipe. The area corresponds to 4 suction ports. An outlet air pressure sensor, an outlet oxygen concentration sensor, and an outlet temperature and humidity sensor are respectively installed below the lower partition, wherein the outlet air pressure sensor is located in the center of the inhalation area, the outlet oxygen concentration sensor is close to the compartment door, and the outlet temperature and humidity sensor is close to the inner compartment. clapboard.

Further, the water tank, the water pump, and the humidification nozzle are connected through hoses to form a humidification system. The refrigeration compressor and the heat exchanger are connected through copper pipelines, and the heat exchange fan assists the heat exchanger in exchanging heat to form a refrigeration cooling system. The oxygen generator and the oxygen nozzle constitute a high-concentration oxygen generating system. The electric control box is connected with an outlet air pressure sensor, an outlet oxygen concentration sensor, an outlet temperature and humidity sensor, an inlet air pressure sensor, an inlet oxygen concentration sensor, an inlet temperature and humidity sensor, and an inlet air pressure sensor through lines to realize the monitoring of the environmental state in the ripening compartment. detection. The electric control box is connected with an oxygen generator, a water pump, a suction fan, a heater, a heat exchange fan, and a pressure fan through lines, and realizes state control of working devices.

The operating method of the kiwifruit aerobic ripening device of the present invention comprises the following steps:

Before starting work, the kiwi fruit is placed in a standard transfer frame with a grid, and the transfer frame is placed in the storage area. The transfer frame is required to fill the entire storage area. The maximum gap is less than 1 cm, and the minimum distance between the transfer frame and the top partition is greater than 0.3 meters, the kiwi fruit is filled as required and the compartment door is closed.

In the rapid high-oxygen ripening mode, the control system in the control box coordinates the circulating air supply system, high-concentration oxygen generation system, humidification system and heating system to participate in the work together, and the refrigeration system is turned off. Start the heat exchange fan, suction fan, and pressure fan in sequence to form a circulating air flow in the air flow channel, obtain the pressure difference between the inlet and outlet air through the inlet air pressure sensor and the outlet air pressure sensor, and adjust the speed of the heat exchange fan, suction fan, and pressure fan. Maintain the airflow pressure in the air intake area 10-45kPa higher than that in the suction area. Since the temperature of kiwi fruit transferred from the cold storage is 0-4°C, after the air circulation is normal, the heating system is turned on, and the temperature difference and humidity difference between the inlet and outlet airflow are obtained through the inlet and outlet temperature and humidity sensors, and the heating intensity of the heater is adjusted according to the temperature difference , to ensure that the temperature difference between the air inlet area and the suction area is less than 4°C, and the maximum air temperature is 30°C. In the return air area, maintain the air humidity in the compartment at 60%. The oxygen concentration control system starts the oxygen generator to generate oxygen with a concentration of 95%. Through the inlet oxygen concentration sensor and the outlet oxygen concentration sensor, the oxygen generator is controlled to inject the generated high-concentration oxygen into the return air area through the oxygen nozzle to realize the ripening compartment. The internal oxygen concentration increases gradually according to the set gradient, and the working air flow sets the oxygen concentration cycle. During the ripening operation, the system works stably in any oxygen concentration range within the oxygen concentration range of 21-58% according to the quality difference, and the oxygen concentration error range of the set concentration value is ±2%. The cooking cycle is 6-10 hours.

In the rapid temperature difference pre-cooling mode, the control system in the control box coordinates the circulating air supply system and the refrigeration system to work together, and the high-concentration oxygen generation system, humidification system and heating system are shut down. Start the heat exchange fan, suction fan, and pressure fan in sequence to form a circulating air flow in the air flow channel, obtain the pressure difference between the inlet and outlet air through the inlet air pressure sensor and the outlet air pressure sensor, and adjust the speed of the heat exchange fan, suction fan, and pressure fan. Maintain the airflow pressure in the air intake area 20-60kPa higher than that in the suction area. After the airflow cycle is normal, turn on the refrigeration system, obtain the temperature difference and humidity difference between the inlet and outlet airflow through the inlet temperature and humidity sensor and the outlet temperature and humidity sensor, adjust the speed of the heat exchange fan and the power of the refrigeration compressor to control the cooling intensity according to the temperature difference, and ensure that the air inlet area is consistent with the The airflow temperature difference in the suction area operates at the set value (temperature difference range 1-12°C). Under any stable working temperature difference value, the error range of the set temperature difference value is ±1°C, and the target temperature for rapid temperature difference pre-cooling of kiwi fruit in storage is 0 ℃.

Beneficial effects of the present invention:

The storage area, the suction area, the air return area and the air intake area described in the present invention form a circulating airflow channel, and under the action of the suction fan, the heat exchange fan and the intake fan, a clockwise circulating airflow is formed. The refrigeration compressor, the heat exchange fan and the heat exchanger can realize the cooling of the circulating airflow. The oxygen nozzle can increase the oxygen concentration of the circulating air flow. The heater can increase the temperature of the circulating airflow. The humidification nozzle can increase the air humidity of the circulating airflow. The storage area 1 is used to place the kiwi fruit to be processed contained in the mesh type transfer frame. The lower partition has a ventilation effect and is used to support the transfer frame.

The invention can realize the oxygen concentration control, air temperature control and air humidity control of the circulating airflow in the kiwi fruit storage area.

The present invention can independently activate the temperature control function, realize the temperature difference between the intake air flow and the suction air flow, and complete the rapid temperature-controlled pre-cooling of kiwi fruit before storage.

The invention can independently open the oxygen concentration control function, realize the air flow in the storage area to set the oxygen concentration cycle, and complete the rapid high-oxygen ripening of kiwifruit when it is out of the warehouse.

Description of drawings

Fig. 1 is a schematic structural view of a kiwifruit aerobic ripening device of the present invention.

Fig. 2 is the top structure schematic diagram of kiwifruit aerobic ripening device of the present invention;

Fig. 3 is the bottom structure schematic diagram of kiwifruit aerobic ripening device of the present invention;

Among them, the outer box 1, the equipment cabin 2, the ripening compartment 3, the outer partition 4, the inner partition 5, the refrigeration compressor 6, the oxygen generator 7, the water tank 8, the water pump 9, the control box 10, the storage area 11, Suction zone 12, return air zone 13, air intake zone 14, compartment door 15, lower partition 16, suction fan 17, suction pipe 18, suction partition 19, outlet air pressure sensor 20, outlet oxygen concentration sensor 21 , outlet temperature and humidity sensor 22, oxygen nozzle 23, humidification nozzle 24, heater 25, heat exchange fan 26, heat exchanger 27, pressure fan 28, top partition 29, inlet air pressure sensor 30, inlet oxygen concentration sensor 31, inlet Temperature and humidity sensor 32.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The kiwifruit aerobic ripening device of the present invention uses a cuboid outer box body 1 as the shell, and the right side end face has two compartment doors 15 that are opened outwards. At 0.8 meters on the left side in the outer box body 1, an outer partition plate 4 is installed by welding, and the inner cavity of the outer box body 1 is divided into two major parts of the equipment cabin 2 and the ripening compartment 3.

The equipment cabin 2 is divided into three layers, the upper layer places the control box 10 and the oxygen generator 7, the middle layer places the water tank 8 and the water pump 9, and the lower layer places the refrigeration compressor 6. The described ripening compartment 3 includes four areas of a storage area 11, an air suction area 12, an air return area 13, and an air intake area 14. This area must maintain airtightness after the compartment door 15 is closed. Side 0.6 meter place, welding installs outer clapboard 4, and the interior surface of ripening compartment 3 comprises that outer clapboard 4, interior clapboard 5, compartment door 15 are provided with heat-insulation material facing the surface of storage area 11.

The air return area 13 is located between the storage area 11 and the equipment cabin 2, and is wrapped by the outer box body 1, the outer partition 4 and the inner partition 5 to form a cuboid cavity, and the three suction pipes 18 at the bottom of the air return area 13 Three suction fans 17 are respectively installed at the ends, and the air outlet direction is upward, and four heaters 25 are bridged between the outer partition 4 and the inner partition 5 through wall brackets, 0.8 meters away from the bottom surface of the return air area 13, and three oxygen Nozzle 23 and 4 humidification nozzles 24 are installed on the outer partition 4, the oxygen nozzle 23 is 1 meter away from the top, the humidification nozzle 24 is 0.5 meter away from the top, the heat exchange fan 26 is fixed on the top of the inner partition 5, and is connected with the heat exchanger 27 Air inlet connection.

As shown in FIG. 2 , the air intake area 14 is located above the storage area 11 , and a top partition 29 is installed by ceiling technology to form a closed chamber for air intake. At the intersection of the air inlet area 14 and the inner partition 5, a heat exchanger 27 is installed through an opening, and the air outlet of the heat exchange fan 26 is connected to the heat exchanger 27, and the airflow blown by the heat exchange fan 26 is cooled by the heat exchanger 27 After entering the chamber of the air inlet area 14, the temperature is further uniform. 8 pressure fans 28 evenly distributed on the top dividing plate 29 are installed to blow air into the kiwi fruit that the storage area 11 is placed by the transfer frame. An inlet air pressure sensor 30 , an inlet oxygen concentration sensor 31 , and an inlet temperature and humidity sensor 32 are all installed on the upper surface of the top partition 29 to obtain air parameters in the air intake area 14 .

As shown in Figure 3, the suction area 12 is located below the storage area 11 and includes 3 suction pipes 18 and 3 partitions 19, which evenly divide the suction area 12 below the lower partition net 16 into 8 independent inspiratory area. The suction pipe 18 is a rectangular hollow steel pipe, and the two sides of the suction pipe 18 in the middle are evenly provided with 8 rectangular openings, and the inner sides of the suction pipe 18 on both sides of the car body are evenly provided with 4 rectangular openings to form each partition. The suction area corresponds to 4 suction ports. The lower partition net 16 is laid and placed on three suction pipes 18, and is made of steel mesh partitions, which can allow air flow to pass through and support the fruit boxes placed in the storage area. The outlet air pressure sensor 20, the outlet oxygen concentration sensor 21, and the outlet temperature and humidity sensor 22 are respectively installed below the described lower partition 16, wherein the outlet air pressure sensor 20 is located in the center of the suction area 12, and the outlet oxygen concentration sensor 21 is close to the compartment door 15. The outlet temperature and humidity sensor 22 is close to the inner partition 5 to obtain air parameters in the suction area 14 .

In particular, the storage area 11, the air suction area 12, the air return area 13, and the air intake area 14 are forming a circulating airflow channel, and the air suction fan 17, the heat exchange fan 26, and the air intake fan 28 drive air to form a Circulating air flow, circulating air flow channel and 3 sets of driving fans together form a circulating air supply system. The air cooling system composed of the refrigeration compressor 6, the heat exchange fan 26 and the heat exchanger 27 is used to reduce the temperature of the circulating air flow. The oxygen generator 7 and the oxygen nozzle 23 constitute a high-concentration oxygen generation system to improve the oxygen concentration of the circulating airflow. The humidification system formed by the water tank 8, the water pump 9 and the humidification nozzle 24 improves the air humidity of the circulating airflow. The heater 25 heats the air flow passing through to increase the temperature of the circulating air flow in the ripening compartment 3 .

Installation work implementation

Before starting work, the kiwi fruit is placed in a standard transfer frame with a grid, and the transfer frame is placed in the storage area 11. The transfer frame is required to fill the entire storage area 11, the maximum gap is less than 1 cm, and the distance between the transfer frame and the top partition is 29 The minimum distance is greater than 0.3 meters, and the compartment door 15 is closed after the kiwi fruit is filled as required.

The van-type kiwi fruit high-oxygen controlled ripening device of the present invention can independently open the fast high-oxygen ripening working mode, and realize the circulation of the airflow in the storage area to set the oxygen concentration (oxygen concentration range 21-58%) through the airflow oxygen concentration control function , to complete the rapid high-oxygen ripening of kiwifruit when it leaves the warehouse.

In the rapid high-oxygen ripening mode, the control system in the control box 10 coordinates the circulating air supply system, the high-concentration oxygen generation system, the humidification system and the heating system to work together, and the refrigeration system is in a shutdown state. Start the heat exchange fan 26, the suction fan 17, and the pressure fan 28 in turn to form a circulating air flow in the air flow channel, obtain the inlet and outlet air pressure difference through the inlet air pressure sensor 30 and the outlet air pressure sensor 20, and adjust the heat exchange fan 26 and the suction fan 17. The rotating speed of the pressure blower 28 is to maintain the airflow pressure in the air inlet area 14 to be 10-45kPa higher than that in the suction area 12. Since the temperature of kiwi fruit transferred from the cold storage is 0-4°C, after the air circulation is normal, the heating system is turned on, and the temperature difference and humidity difference between the inlet and outlet airflow are obtained through the inlet temperature and humidity sensor 32 and the outlet temperature and humidity sensor 22, and the heater 25 is adjusted according to the temperature difference The heating intensity ensures that the temperature difference between the air inlet area 14 and the suction area 12 is less than 4°C, and the maximum air temperature is 30°C. The humidification system turns on the water pump 9 in due course according to the humidity difference between the air inlet area 14 and the suction area 12, and passes through the humidification nozzle 24. The atomized mist is sprayed into the air return area 13 to maintain the air humidity in the compartment at 60%. The oxygen concentration control system starts the oxygen generator 7 to generate oxygen with a concentration of 95%. Through the inlet oxygen concentration sensor 31 and the outlet oxygen concentration sensor 21, the oxygen generator 7 is controlled to inject the generated high-concentration oxygen into the return air area through the oxygen nozzle 23 13. Realize that the oxygen concentration in the ripening chamber 3 is gradually increased according to the set gradient, and the working air flow sets the oxygen concentration cycle. During the ripening operation, the system works stably in any oxygen concentration range within the oxygen concentration range of 21-58% according to the quality difference, and the oxygen concentration error range of the set concentration value is ±2%. The cooking cycle is 6-10 hours.

The van-type kiwi fruit high oxygen controlled ripening device of the present invention can independently open the rapid temperature difference pre-cooling working mode, and through the airflow temperature control function, the airflow in the air inlet and the airflow in the inhalation can be realized to set the temperature gradient (the temperature difference range is 1-6°C) ), when the kiwi fruit is put into storage, it will be pre-cooled quickly with the set temperature difference.

In the rapid temperature difference pre-cooling mode, the control system in the control box 10 coordinates the circulating air supply system and the refrigeration system to work together, and the high-concentration oxygen generation system, humidification system and heating system are in the shutdown state. Start the heat exchange fan 26, the suction fan 17, and the pressure fan 28 in turn to form a circulating air flow in the air flow channel, obtain the inlet and outlet air pressure difference through the inlet air pressure sensor 30 and the outlet air pressure sensor 20, and adjust the heat exchange fan 26 and the suction fan 17. The rotating speed of the pressure blower 28 is to maintain the airflow pressure in the air inlet area 14 to be 20-60kPa higher than that in the suction area 12. After the air circulation is normal, turn on the refrigeration system, obtain the temperature difference and humidity difference between the inlet and outlet airflow through the inlet temperature and humidity sensor 32 and the outlet temperature and humidity sensor 22, adjust the speed of the heat exchange fan 26 and the power of the refrigeration compressor 6 to control the cooling intensity according to the temperature difference, to ensure The airflow temperature difference between the air inlet area 14 and the suction area 12 operates at the set value (temperature difference range 1-12°C). Under any stable working temperature difference value, the error range of the set temperature difference value is ±1°C. The cold target temperature is 0 °C.

The above is only a preferred specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field within the technical scope disclosed in the present invention can obviously obtain the simplicity of the technical solution. Changes or equivalent replacements all fall within the protection scope of the present invention.

Claims (1)

1. An operation method of an oxygenation ripening device for kiwi fruits comprises the following steps: the outer box is an integral shell, and the equipment cabin and the ripening compartment are separated by an outer partition plate; the equipment cabin comprises a refrigeration compressor, an oxygen generator, a water tank, a water pump and a control box, the ripening compartment comprises a storage area, an air suction area, an air return area, an air inlet area and a compartment door, the storage area and the air return area are separated by an inner partition plate, the air suction area comprises a lower partition net, an air suction fan, an air suction pipe, an air suction partition plate, an outlet air pressure sensor, an outlet oxygen concentration sensor and an outlet temperature and humidity sensor, the air return area comprises an oxygen nozzle, a humidifying nozzle and a heater, and the air inlet area comprises a heat exchange fan, a heat exchanger, a pressure fan, a top partition plate, an inlet air pressure sensor, an inlet oxygen concentration sensor and an inlet temperature and humidity sensor; the storage area is positioned in the center of the ripening compartment, the lower partition net is used as a bottom plate of the storage area, the air suction area is positioned below the storage area, the air inlet area is positioned above the storage area, the air return area is positioned on the inner side of the storage area, and the compartment door is positioned on the outer side of the storage area, and the operation method comprises the following steps:

before the kiwi fruit transport device starts to work, the kiwi fruit is placed in a standard transport frame with grids, the transport frame is stacked in a storage area, the transport frame is required to fill the whole storage area, the maximum gap is smaller than 1 cm, the minimum distance between the transport frame and a top partition plate is larger than 0.3 m, and a compartment door is closed after the kiwi fruit is filled as required;

under the working mode of rapid high-oxygen ripening, the control system in the control box coordinates the work of the circulating air supply system, the high-concentration oxygen generation system, the humidification system and the heating system, and the refrigeration system is in a shutdown state; starting the heat exchange fan, the air suction fan and the pressure fan in sequence, forming circulating airflow in the airflow channel, acquiring airflow pressure difference between an inlet and an outlet through the inlet air pressure sensor and the outlet air pressure sensor, adjusting the rotating speed of the heat exchange fan, the air suction fan and the pressure fan, and maintaining the air inlet area to be 10-45kPa higher than the airflow pressure of the air suction area; because the temperature of the kiwi fruit transferred from the refrigeration house is 0-4 ℃, after the airflow circulation is normal, the heating system is started, the temperature difference and the humidity difference of the airflow at the inlet and the outlet are obtained through the inlet temperature and humidity sensor and the outlet temperature and humidity sensor, the heating intensity of the heater is adjusted according to the temperature difference, the temperature difference between the air inlet area and the air suction area is ensured to be less than 4 ℃, the highest temperature of the airflow is 30 ℃, the humidifying system is started up the water pump in due time according to the humidity difference between the air inlet area and the air suction area, atomized fog drops are sprayed into the air return area through the humidifying nozzle, and the humidity of the airflow in the carriage is maintained to be 60%; the oxygen concentration control system starts the oxygen generator to generate oxygen with the concentration of 95%, and controls the oxygen generator to inject the generated high-concentration oxygen into the air return area through the oxygen nozzle by the inlet oxygen concentration sensor and the outlet oxygen concentration sensor, so that the oxygen concentration in the ripening box is gradually increased according to the set gradient, and the working air flow sets the oxygen concentration to circulate; in the ripening operation, according to the fact that a quality difference system is within an oxygen concentration range of 21-58%, any oxygen concentration range works stably, the error range of the oxygen concentration of the concentration value is set to be +/-2%, and the period of the rapid high-oxygen ripening operation of the kiwi fruits discharged from a warehouse at the temperature of 0 ℃ is 6-10 hours;

under the rapid temperature difference precooling working mode, the control system in the control box coordinates the circulating air supply system and the refrigerating system to jointly participate in working, and the high-concentration oxygen generation system, the humidifying system and the heating system are in a shutdown state; starting the heat exchange fan, the air suction fan and the pressure fan in sequence, forming a circulating air flow in the air flow channel, acquiring the air flow pressure difference between an inlet and an outlet through the inlet air pressure sensor and the outlet air pressure sensor, adjusting the rotating speed of the heat exchange fan, the air suction fan and the pressure fan, and maintaining the air inlet area to be 20-60kPa higher than the air flow pressure of the air suction area; after the airflow circulation is normal, a refrigerating system is started, the temperature difference and the humidity difference of the inlet airflow and the outlet airflow are obtained through an inlet temperature and humidity sensor and an outlet temperature and humidity sensor, the refrigerating intensity is controlled by adjusting the rotating speed of a heat exchange fan and the power of a refrigerating compressor according to the temperature difference, the operation of the airflow temperature difference between an air inlet area and an air suction area in a set temperature difference range of 1-12 ℃ is ensured, the error range of the temperature difference value is set to be +/-1 ℃ under any stable working temperature difference value, and the target temperature of the rapid temperature difference precooling of the kiwi fruits stored in the warehouse is 0 ℃.

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