Refrigeration method of air-conditioned cold storage and air-conditioned cold storage

Abstract

The invention provides a refrigeration method of an air-conditioned cold storage and the air-conditioned cold storage.The refrigeration method in the embodiment comprises the steps that fruit and vegetable storage data are stored in advance, and the fruit and vegetable storage data comprise at least one fruit and vegetable type and storage conditions needed by corresponding fruits and vegetables; according to fruits and vegetables to be refrigerated in the fruit and vegetable warehouse, fruit and vegetable type selection information is received through a selection module, and fruit and vegetable types are set; according to the set fruit and vegetable types, obtaining storage conditions required for refrigerating the fruits and vegetables in the controlled atmosphere refrigeration house from pre-stored fruit and vegetable storage data; and refrigeration parameters of the controlled atmosphere refrigeration house are automatically adjusted based on the storage conditions. According to the refrigeration method of the air-conditioned cold storage, the technical problem that the air-conditioned cold storage is complex in operation setting in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of atmosphere-controlled cold storage, and in particular to a refrigeration method of an atmosphere-controlled cold storage and an atmosphere-controlled cold storage. Background Art

[0002] Fruits and vegetables often have concentrated time on the market, are difficult to store for a long time, and difficult to transport over long distances, resulting in low economic benefits and high decay losses. Controlled atmosphere cold storage can create a storage environment suitable for fruits and vegetables by controlling the temperature and gas composition, which helps preserve the fruits and vegetables. The structure of a controlled atmosphere cold storage mainly consists of a storage body, a deoxygenator or a nitrogen generator, a carbon dioxide remover, an ethylene remover, a breathing bag, a humidifier, a vacuum pump, an air compressor, etc. The structure and control module are relatively complex.

[0003] The principle of oxygen reduction in atmosphere-controlled cold storage can be divided into nitrogen filling and adsorption. Nitrogen filling mainly uses nitrogen generators or nitrogen cylinders to fill the storage body to achieve oxygen reduction. Adsorption mainly uses hollow fiber membranes or special granular carbon adsorbents to adsorb oxygen, and then the air from which oxygen is adsorbed and removed is filled into the storage to achieve oxygen reduction. The principle of carbon dioxide removal can be divided into chemical adsorption and physical adsorption. Chemical adsorption mainly uses reagents such as sodium hydroxide to adsorb carbon dioxide, and physical adsorption mainly uses special granular carbon to adsorb and remove carbon dioxide. The principle of ethylene removal can be divided into combustion oxidation and chemical oxidation. The combustion oxidation method mainly uses high-temperature palladium metal to oxidize ethylene into carbon dioxide, and the chemical oxidation method mainly uses strong oxidant acid potassium permanganate to oxidize ethylene into carbon dioxide. However, the above methods have the problems of causing large fluctuations in temperature or humidity in the storage, slow construction of atmosphere-controlled environment, and the need for external gas cylinders and chemical reagent consumables. It is difficult to achieve a fast, consumable-free, low-temperature and humidity-fluctuating atmosphere-controlled cold storage environment.

[0004] In addition, although modern cold storage can use computers or central control panels to conveniently set temperature, humidity, carbon dioxide concentration, oxygen concentration, ethylene concentration, etc., each parameter will significantly affect the storage quality of fruits and vegetables (for example, too low oxygen will cause fruits and vegetables to undergo anaerobic respiration, too high oxygen cannot effectively inhibit microorganisms and various oxidation reactions, too low humidity will cause the surface of fruits and vegetables to shrink and dry, and too high humidity will cause condensation on the surface of fruits and vegetables, making them easy to spoil, etc.), so appropriate parameter settings must be selected for each type of fruit and vegetable. However, for most farmers, it is difficult to set the most appropriate control parameters for each type of fruit and vegetable, and it is difficult to train each farmer on how to use it.

[0005] At the same time, most fruits and vegetables need a low-oxygen environment for storage, and people cannot breathe in a low-oxygen environment, so they cannot directly enter the warehouse to check the real-time freshness of fruits and vegetables. If the warehouse is opened directly to restore the oxygen concentration to check the fruits and vegetables, the temperature, humidity and atmosphere will be destroyed, resulting in a deterioration in the preservation effect of fruits and vegetables. At the same time, the current freshness judgment method only selects one of the images or smells for freshness judgment, or only performs a simple joint judgment of the two, resulting in large errors in freshness judgment.

[0006] In summary, the existing controlled atmosphere cold storage has problems such as slow establishment of controlled atmosphere environment and possible need for consumables, complex operation and setting of controlled atmosphere cold storage, and difficulty in accurately judging the freshness of fruits and vegetables in real time.

[0007] Therefore, the prior art needs to be further developed. Summary of the invention

[0008] The purpose of the present invention is to overcome the above technical deficiencies and provide a refrigeration method for a controlled atmosphere cold storage and a controlled atmosphere cold storage to solve the technical problem of complex operation and setting of the controlled atmosphere cold storage in the related art.

[0009] In order to achieve the above technical purpose, the present invention adopts the following technical scheme: a refrigeration method for a controlled atmosphere cold storage is provided, the refrigeration method comprising:

[0010] Pre-storing fruit and vegetable storage data, the fruit and vegetable storage data including: at least one type of fruit and vegetable and storage conditions required for the corresponding fruit and vegetable;

[0011] According to the fruits and vegetables to be refrigerated in the fruit and vegetable warehouse, the selection module receives the fruit and vegetable type selection information and sets the fruit and vegetable types;

[0012] According to the set fruit and vegetable types, the storage conditions required for refrigerating fruits and vegetables in the atmosphere-controlled cold storage are obtained from the pre-stored fruit and vegetable storage data;

[0013] Automatically adjust refrigeration parameters of controlled atmosphere cold storage based on storage conditions.

[0014] Furthermore, the storage conditions include at least one of the following: a set refrigeration temperature, a set atmosphere-controlled gas concentration, a set refrigeration humidity, and an estimated storage time.

[0015] Furthermore, the method for automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions includes:

[0016] Based on the storage conditions of the atmosphere-controlled cold storage, adjust the temperature in the fruit and vegetable storage to reach the set refrigeration temperature;

[0017] When the temperature in the fruit and vegetable warehouse reaches the set refrigeration temperature, the concentration of the controlled atmosphere gas in the fruit and vegetable warehouse is adjusted to reach the set controlled atmosphere gas concentration;

[0018] When the concentration of the controlled atmosphere gas in the fruit and vegetable warehouse reaches the set controlled atmosphere gas concentration, the humidity in the fruit and vegetable warehouse is adjusted to reach the set refrigerated humidity.

[0019] Furthermore, the method for adjusting the temperature in the fruit and vegetable storage to reach the set refrigeration temperature includes:

[0020] After controlling the refrigeration module to operate at the set refrigeration temperature for a first preset time, determining whether the current temperature in the fruit and vegetable storage reaches the set refrigeration temperature;

[0021] If the current temperature in the fruit and vegetable storage does not reach the set refrigeration temperature, the refrigeration module is controlled to continue refrigeration;

[0022] If the current temperature in the fruit and vegetable storage reaches the set refrigeration temperature, the refrigeration module is controlled to stop refrigeration.

[0023] Furthermore, the controlled atmosphere gas includes at least one of the following: oxygen, carbon dioxide, and ethylene. The method for adjusting the controlled atmosphere gas concentration in the fruit and vegetable warehouse to reach the set controlled atmosphere gas concentration includes:

[0024] The high-pressure liquefied gas prepared in advance by the gas conditioning module is transported to the fruit and vegetable warehouse and mixed with the gas conditioning gas in the fruit and vegetable warehouse;

[0025] Determine whether the oxygen concentration in the fruit and vegetable storage reaches the set oxygen concentration;

[0026] If the oxygen concentration in the fruit and vegetable storage reaches the set oxygen concentration, the delivery of conditioned gas will be stopped;

[0027] Determine whether other types of controlled atmosphere gases in the fruit and vegetable warehouse have reached the set controlled atmosphere gas concentration;

[0028] If other types of controlled atmosphere gases do not reach the set controlled atmosphere gas concentration, the concentration of other types of controlled atmosphere gases in the fruit and vegetable warehouse will be reduced.

[0029] Furthermore, before automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the refrigeration method further includes an operation preparation stage, which includes the following steps:

[0030] Turn on the refrigeration module to lower the temperature in the fruit and vegetable storage to the preset pre-cooling temperature;

[0031] Turn on the gas conditioning module to prepare high-pressure liquefied gas conditioning gas and store the high-pressure liquefied gas conditioning gas;

[0032] Collect and record original images of fruits and vegetables.

[0033] Further, before automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the atmosphere-controlled cold storage includes an anti-reverse locking mechanical switch for preventing the inner isolation door of the fruit and vegetable storage from being reversely locked, and the refrigeration method further includes:

[0034] Collect images in the fruit and vegetable warehouse;

[0035] Based on the images in the fruit and vegetable warehouse, determine whether there are still people in the fruit and vegetable warehouse;

[0036] If there are people staying in the fruit and vegetable warehouse, the anti-reverse locking mechanical switch will be turned on and the atmosphere-controlled cold storage will sound an alarm;

[0037] If there is no one left in the fruit and vegetable warehouse, determine whether the inner isolation door is closed;

[0038] If the inner isolation door is closed, the atmosphere-controlled cold storage meets the refrigerated operation conditions.

[0039] Further, after automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the refrigeration method further includes:

[0040] According to the set types of fruits and vegetables, detection is performed at every second preset time interval. When any refrigeration parameter of the atmosphere-controlled cold storage does not meet the set refrigeration parameter, the storage condition of the atmosphere-controlled cold storage is controlled to remain unchanged.

[0041] Further, according to the set types of fruits and vegetables, the detection is performed at every second preset time interval. When any refrigeration parameter of the atmosphere-controlled cold storage does not meet the set refrigeration parameter, the method of controlling the storage condition of the atmosphere-controlled cold storage to remain unchanged includes:

[0042] Detect various current refrigeration parameters, compare the current refrigeration parameters with the set refrigeration parameters, and obtain the change rate of various refrigeration parameters;

[0043] If the change rate of any refrigeration parameter is greater than -5% ≦ and less than ≦ +5%, the gas-controlled cold storage will not be processed;

[0044] If the change rate of any refrigeration parameter is less than -5% or greater than +5%, the refrigeration module or the air conditioning module or the humidifier is turned on accordingly until the refrigeration parameter meets the set refrigeration parameter again.

[0045] Furthermore, the refrigeration method also includes: according to the set types of fruits and vegetables, obtaining the current image of the fruits and vegetables and the current concentration of odorous gases in the fruit and vegetable warehouse at every third preset time interval, judging the current freshness of the fruits and vegetables according to the original image, current image and current concentration of odorous gases of the fruits and vegetables, and taking processing according to the current freshness of the fruits and vegetables.

[0046] Furthermore, the method for judging the current freshness of fruits and vegetables according to the original image of fruits and vegetables, the current image and the current concentration of odorous gas includes:

[0047] Acquire original color information of fruits and vegetables according to the original images of fruits and vegetables, and acquire current color information of fruits and vegetables according to the current images of fruits and vegetables;

[0048] Calculate the color change coefficient Ki of the fruits and vegetables according to the original color information, current color information of the fruits and vegetables and the color change coefficient calculation formula;

[0049] Calculate the odor gas threshold line Qi of the fruits and vegetables according to the current odor gas concentration and the odor gas threshold line calculation formula;

[0050] Judge the current freshness of the fruits and vegetables according to the color change coefficient Ki and the odor gas threshold line Qi.

[0051] Further, the method for judging the current freshness of the fruits and vegetables according to the color change coefficient Ki and the odor gas threshold line Qi includes:

[0052] When 1.0 < Qi or 1.15 < Ki, the fruits and vegetables are judged to be spoiled;

[0053] When 0.4 < Qi ≤ 1.0 or 1.10 < Ki ≤ 1.15, the fruits and vegetables are judged to be third-level fresh;

[0054] When 0.2 < Qi ≤ 0.4 or 1.05 < Ki ≤ 1.10, the fruits and vegetables are judged to be second-level fresh;

[0055] When 0 ≤ Qi ≤ 0.2 and 0.95 ≤ Ki ≤ 1.05, the fruits and vegetables are judged to be first-level fresh;

[0056] Select the worst freshness among the color change coefficient Ki and the odor gas threshold line Qi as the current freshness of the fruits and vegetables.

[0057] Further, the method for making a treatment according to the current freshness of the fruits and vegetables includes:

[0058] When the freshness of the fruits and vegetables is first-level fresh or second-level fresh, the background of the display panel is displayed in green;

[0059] When the freshness of the fruits and vegetables is third-level fresh, the background of the display panel is displayed in yellow, and the controlled atmosphere cold storage issues an alarm;

[0060] When the freshness of the fruits and vegetables is spoiled, the background of the display panel is displayed in red, and the controlled atmosphere cold storage issues an alarm.

[0061] Further, the color change coefficient calculation formula is:

[0062] Ki = [(ai* / bi*) / (a0* / b0*)] × [Li / L0];

[0063] Wherein, ai* is the red-green chromaticity in the current image of the fruits and vegetables, bi* is the yellow-blue chromaticity in the current image of the fruits and vegetables, and Li is the brightness in the current image of the fruits and vegetables;

[0064] a0* is the red and green color in the original image of fruits and vegetables, b0* is the yellow and blue color in the original image of fruits and vegetables, and L0 is the brightness in the original image of fruits and vegetables.

[0065] Furthermore, the calculation formula of the odor gas threshold line is:

[0066] Qi=(Q1i / Q1)+(Q2i / Q2)+(Q3i / Q3)+(Q4i / Q4)+(Q5i / Q5);

[0067] Among them, Q1i is the current alcohol concentration in the fruit and vegetable warehouse, Q2i is the current volatile acid concentration in the fruit and vegetable warehouse, Q3i is the current ketone aldehyde concentration in the fruit and vegetable warehouse, Q4i is the current ammonia concentration in the fruit and vegetable warehouse, and Q5i is the current hydrogen sulfide concentration in the fruit and vegetable warehouse;

[0068] Q1 is the alcohol concentration threshold in the fruit and vegetable warehouse, Q2 is the volatile acid concentration threshold in the fruit and vegetable warehouse, Q3 is the ketone aldehyde concentration threshold in the fruit and vegetable warehouse, Q4 is the ammonia concentration threshold in the fruit and vegetable warehouse, and Q5 is the hydrogen sulfide concentration threshold in the fruit and vegetable warehouse.

[0069] A controlled atmosphere cold storage, including a fruit and vegetable storage for storing fruits and vegetables to be refrigerated, the controlled atmosphere cold storage comprising:

[0070] A database module, the database module is used to store fruit and vegetable storage data;

[0071] A selection module, used to receive the types of fruits and vegetables to be refrigerated set by the user;

[0072] The control module is used to execute the above-mentioned refrigeration method of the atmosphere-controlled cold storage.

[0073] Furthermore, the atmosphere controlled cold storage also includes:

[0074] The refrigeration module is used to adjust the temperature in the fruit and vegetable storage, and the refrigeration module is connected to the control module by signal;

[0075] The gas conditioning module includes a gas conditioning unit for preparing high-pressure liquefied gas conditioning gas and a temporary storage tank for storing high-pressure liquefied gas conditioning gas, the gas outlet of the temporary storage tank is connected to the inside of the fruit and vegetable warehouse, and the gas conditioning module is connected to the control module by signal;

[0076] A humidifier, the outlet of the humidifier is connected to the interior of the fruit and vegetable warehouse, the humidifier is used to adjust the humidity in the fruit and vegetable warehouse, and the humidifier is connected to the control module signal.

[0077] Furthermore, the atmosphere controlled cold storage includes:

[0078] A color data processing module, which is used to obtain images of fruits and vegetables and obtain color information of the fruits and vegetables based on the images of the fruits and vegetables;

[0079] Odor gas detection module, which is used to obtain the concentration of odorous gas in the fruit and vegetable warehouse;

[0080] The control module is respectively connected with the color data processing module and the odor gas detection module by signals to obtain the current freshness of fruits and vegetables.

[0081] Further, the atmosphere-controlled cold storage includes a sensor matrix, the sensor matrix includes a gas sensor, and the gas sensor is used to detect the concentration of the atmosphere-controlled gas and the concentration of the odorous gas in the fruit and vegetable storage;

[0082] The sensor matrix includes at least two, and the at least two sensor matrices are respectively arranged on the inner wall of the fruit and vegetable storage.

[0083] Further, the color data processing module includes a camera, which is used to collect images of the interior of the fruit and vegetable warehouse and images of the fruits and vegetables;

[0084] Among them, the cameras include at least two, and the at least two cameras are respectively arranged on the inner wall of the fruit and vegetable storage.

[0085] Furthermore, the atmosphere controlled cold storage includes:

[0086] Buffer room: The buffer room is set between the fruit and vegetable warehouse and the external environment. The buffer room and the external environment are connected through an external isolation door;

[0087] Inner isolation door: The inner isolation door is located between the buffer room and the fruit and vegetable storage.

[0088] Furthermore, the selection module includes a display operation panel, which is used to set the types of fruits and vegetables;

[0089] The display operation panel includes an inner display operation panel and an outer display operation panel. The inner display operation panel is arranged at the inner isolation door, and the outer display operation panel is arranged at the outer isolation door.

[0090] Furthermore, the atmosphere-controlled cold storage includes a high-pressure ozone generator, which is used to sterilize the inside of the fruit and vegetable storage.

[0091] Beneficial effects:

[0092] 1. In the refrigeration method of the present embodiment, a database module is built into the atmosphere-controlled cold storage to form an atmosphere-controlled environmental parameter database for fruits and vegetables. The fruit and vegetable categories are used as function options. Before the fruits and vegetables start to be refrigerated, the types of fruits and vegetables are selected with one click, so that multiple refrigeration parameters such as atmosphere-controlled gas concentration, temperature and humidity and other atmosphere-controlled environmental parameters are set with one click, which reduces the user's difficulty of use. By selecting the types of fruits and vegetables, the most suitable control parameters for fruits and vegetables are called with one click and automatically adjusted in place, thereby meeting the storage conditions required for fruits and vegetables, and solving the technical problem of complex operation settings of atmosphere-controlled cold storage in related technologies.

[0093] 2. In order to solve the problem that it is difficult to observe the freshness of fruits and vegetables in real time in controlled atmosphere cold storage, a monitoring camera is used to connect the color data processing module and the odor gas detection module to detect the color and odor gas of fruits and vegetables. The freshness is comprehensively and accurately judged by combining the color change coefficient and the odor gas threshold line, and the freshness is accurately displayed and warned in real time, solving the problem that it is difficult to accurately judge the freshness of fruits and vegetables in real time in controlled atmosphere cold storage.

[0094] 3. In order to solve the problem that it is slow to establish a controlled atmosphere environment in a controlled atmosphere cold storage and consumables may be needed, a controlled atmosphere unit module is used to pre-deoxygenate and decarbonate the air and then temporarily store it in high-pressure liquefaction. During the controlled atmosphere, the liquefied gas is decompressed and mixed with fresh air to achieve rapid controlled atmosphere, and a low-oxygen, low-carbon dioxide, and low-ethylene liquefied gas reserve system is established to solve the problem that it is slow to establish a controlled atmosphere environment in a controlled atmosphere cold storage and consumables may be needed.

[0095] 4. The atmosphere-controlled cold storage in this embodiment uses the fruit and vegetable category as a functional option, realizes one-click setting of atmosphere-controlled environmental parameters such as oxygen concentration, carbon dioxide concentration, ethylene control amount, temperature and humidity, establishes a liquefied gas reserve system with low oxygen, low carbon dioxide and low ethylene, monitors and records the connected color data processing module and the odor gas detection module for real-time display and early warning of freshness, and comprehensively establishes an easy-to-operate intelligent atmosphere-controlled cold storage to solve the problems of slow establishment of atmosphere-controlled environment and possible need for consumables, complex operation and setting of atmosphere-controlled cold storage, and difficulty in real-time and accurate judgment of the freshness of fruits and vegetables, so as to achieve more accurate, higher quality, more economical and simpler preservation of fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] Figure 1 is a flow chart of a refrigeration method adopted in an embodiment of the present invention;

[0097] Figure 2 It is a schematic diagram of the structure of the atmosphere-controlled cold storage used in the embodiment of the present invention;

[0098] Figure 3 It is a schematic diagram of setting a first-level interface of a display operation panel of an atmosphere-controlled cold storage used in an embodiment of the present invention;

[0099] Figure 4 It is a schematic diagram of setting a secondary interface of a display operation panel of a gas-controlled cold storage used in an embodiment of the present invention;

[0100] Figure 5 It is a schematic diagram of a three-level interface of a display operation panel of a gas-controlled cold storage used in an embodiment of the present invention;

[0101] Figure 6 It is a schematic diagram of a color data processing module and an odor gas detection module of a gas-controlled cold storage used in an embodiment of the present invention;

[0102] Figure 7It is a flow chart of a specific embodiment of the refrigeration method adopted in the embodiment of the present invention.

[0103] The above drawings include the following reference numerals:

[0104] 1. Fruit and vegetable warehouse; 11. Wind alarm; 2. Refrigeration module; 3. Air conditioning module; 31. Temporary storage tank; 32. Air compressor; 4. Humidifier; 5. Sensor matrix; 6. Camera; 7. Buffer room; 8. Inner isolation door; 81. Anti-reverse locking mechanical switch; 9. Display operation panel; 91. Display operation panel; 92. External display operation panel; 93. High-pressure ozone generator. DETAILED DESCRIPTION

[0105] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0106] Example 1

[0107] According to an embodiment of the present invention, a gas-controlled cold storage is provided. Figures 1 to 7 , including a fruit and vegetable storage 1 for storing fruits and vegetables to be refrigerated, the atmosphere-controlled cold storage includes: a database module, the database module is used to store fruit and vegetable storage data; a selection module, used to receive the types of fruits and vegetables to be refrigerated set by the user; a control module, used to execute the refrigeration method of the atmosphere-controlled cold storage in the present invention.

[0108] Specifically, the atmosphere-controlled cold storage includes: a selection module, which is used to set the types of fruits and vegetables according to the fruits and vegetables in the fruit and vegetable storage 1; a control module, which obtains the storage conditions required for refrigerating fruits and vegetables in the atmosphere-controlled cold storage system according to the set types of fruits and vegetables, and adjusts the refrigeration parameters of the atmosphere-controlled cold storage system based on the storage conditions.

[0109] In the atmosphere-controlled cold storage of the present embodiment, a database module is built in to form an atmosphere-controlled environmental parameter database for fruits and vegetables. The categories of fruits and vegetables are used as function options. Before the fruits and vegetables begin to be refrigerated, the types of fruits and vegetables can be selected with one click, so that multiple refrigeration parameters such as atmosphere-controlled gas concentration, temperature and humidity and other atmosphere-controlled environmental parameters can be set with one click, which reduces the user's difficulty of use. By selecting the types of fruits and vegetables, the most suitable control parameters for the corresponding fruits and vegetables can be called with one click and automatically adjusted in place, thereby meeting the storage conditions required for the fruits and vegetables, solving the technical problem of complex operation settings of atmosphere-controlled cold storage in related technologies.

[0110] In the atmosphere-controlled cold storage of this embodiment, see Figure 2The atmosphere-controlled cold storage includes: a refrigeration module 2, which is used to adjust the temperature in the fruit and vegetable warehouse 1, and the refrigeration module 2 is connected to the control module by signal; an atmosphere-controlled module 3, which includes an atmosphere-controlled unit for preparing high-pressure liquefied atmosphere-controlled gas and a temporary storage tank 31 for storing high-pressure liquefied atmosphere-controlled gas, the gas outlet of the temporary storage tank 31 is connected to the interior of the fruit and vegetable warehouse 1, and the atmosphere-controlled module 3 is connected to the control module by signal; a humidifier 4, the outlet of the humidifier 4 is connected to the interior of the fruit and vegetable warehouse 1, the humidifier 4 is used to adjust the humidity in the fruit and vegetable warehouse 1, and the humidifier 4 is connected to the control module by signal.

[0111] Specifically, by setting up the atmosphere-controlled module 3, a high-pressure liquefied atmosphere-controlled gas reserve system is established. Before starting refrigeration, the high-pressure liquefied atmosphere-controlled gas is prepared and stored in advance. When the refrigeration is in operation, the high-pressure liquefied atmosphere-controlled gas is quickly called to mix the high-pressure liquefied atmosphere-controlled gas with ordinary air in the fruit and vegetable warehouse 1, thereby realizing the rapid establishment of an atmosphere-controlled environment and reducing the waste of consumables.

[0112] In some embodiments, in order to increase the storage capacity of high-pressure liquefied gas conditioning gas in a limited space, an air compressor is used to compress the prepared high-pressure liquefied gas conditioning gas, and the treated gas is pressurized by the air compressor 32 at a certain power to become high-pressure liquefied air, and then stored in a temporary storage tank 31 similar to a liquefied gas temporary storage tank.

[0113] In the atmosphere-controlled cold storage of this embodiment, see Figure 2 The atmosphere-controlled cold storage includes: a color data processing module, which is used to obtain images of fruits and vegetables and obtain color information of fruits and vegetables according to the images of fruits and vegetables; an odor gas detection module, which is used to obtain the concentration of odor gas in the fruit and vegetable storage 1; and a control module is respectively connected to the color data processing module and the odor gas detection module signal to obtain the current freshness of fruits and vegetables.

[0114] In the atmosphere-controlled cold storage of this embodiment, see Figure 2 The atmosphere-controlled cold storage includes a sensor matrix 5, which includes a gas sensor for detecting the concentration of atmosphere-controlled gas and the concentration of odorous gas in the fruit and vegetable storage 1; wherein the sensor matrix 5 includes at least two, and at least two sensor matrices 5 are respectively arranged on the inner wall of the fruit and vegetable storage 1.

[0115] The sensor matrix 5 also includes a temperature and humidity sensor for detecting the temperature and humidity in the fruit and vegetable storage 1. The temperature and humidity sensor is connected to the control module signal.

[0116] In the atmosphere-controlled cold storage of this embodiment, the color data processing module and the odor gas detection module perform real-time display and warning of freshness, detect the color and odor gas of fruits and vegetables, and make a comprehensive and accurate judgment on the freshness by combining the color change coefficient and the odor gas threshold line. The freshness is accurately displayed and warned in real time, solving the problem that it is difficult for the atmosphere-controlled cold storage to accurately judge the freshness of fruits and vegetables in real time.

[0117] In the atmosphere-controlled cold storage of this embodiment, see Figure 2 The color data processing module includes a camera 6, which is used to collect images inside the fruit and vegetable warehouse 1 and images of fruits and vegetables; wherein the camera 6 includes at least two cameras, and at least two cameras 6 are respectively arranged on the inner wall of the fruit and vegetable warehouse 1.

[0118] By setting up camera 6 to collect images of the interior of the fruit and vegetable warehouse 1 and images of fruits and vegetables, it can be used to intelligently determine whether there are still staff members in the fruit and vegetable warehouse, and collect images of fruits and vegetables, so as to connect camera 6 to the color data processing module and the odor gas detection module for real-time display and early warning of freshness.

[0119] In some embodiments, the cameras 6 include two cameras, and the two cameras 6 are respectively located on two opposite inner walls of the fruit and vegetable storage 1.

[0120] In the atmosphere-controlled cold storage of this embodiment, see Figure 2 The atmosphere-controlled cold storage includes: a buffer room 7, which is arranged between the fruit and vegetable warehouse 1 and the external environment, and the buffer room 7 is connected to the external environment through an external isolation door; an internal isolation door 8, which is located between the buffer room 7 and the fruit and vegetable warehouse 1.

[0121] In some embodiments, in order to facilitate observation of the situation inside the warehouse, the inner isolation door 8 is a transparent glass door.

[0122] In some embodiments, an anti-reverse locking mechanical switch 81 is provided in the fruit and vegetable storage 1, and the anti-reverse locking mechanical switch 81 is used to prevent the inner isolation door 8 from being reversely locked.

[0123] Specifically, this is because humans cannot survive in a low-oxygen environment, and once the atmosphere is controlled, the fruit and vegetable warehouse 1 switches back and forth between strong positive pressure and strong negative pressure. If there is no anti-reverse locking structure, the inner isolation door 8 will be directly sucked by the strong negative pressure and cannot be opened by manpower. At this time, the anti-reverse locking mechanical switch 81 can effectively avoid this situation. In a conventional cold storage without anti-reverse locking and personnel detection reminders, more than two people are required to operate the atmosphere-controlled cold storage, one person outside and one person inside. The personnel detection system and anti-reverse locking mechanical switch 81 in this embodiment can realize single-person safe operation, reduce labor costs, and improve personnel safety.

[0124] In the atmosphere-controlled cold storage of this embodiment, see Figure 2The selection module includes a display operation panel 9, which is used to set the types of fruits and vegetables; wherein the display operation panel 9 includes an inner display operation panel 91 and an outer display operation panel 92, the inner display operation panel 91 is arranged at the inner isolation door 8, and the outer display operation panel 92 is arranged at the outer isolation door.

[0125] Through the above settings, the user can receive fruit and vegetable category selection information through the internal display operation panel 91 and the external display operation panel 92 to set the fruit and vegetable category. The user can also display the refrigeration parameters or freshness information in the fruit and vegetable warehouse through the internal display operation panel 91 and the external display operation panel 92, so that the user can obtain the storage status of fruits and vegetables.

[0126] See also Figure 3-5 , Figure 3 The first level interface of the inner display operation panel 91 or the outer display operation panel 92 is set. Taking green leafy vegetables as an example, Figure 3 The interface displayed in the figure is the upper interface before the selection module sets the types of fruits and vegetables to be refrigerated. Select the corresponding fruit and vegetable category according to the type of fruits and vegetables. Figure 4 This is the interface for setting specific fruit and vegetable types. After selecting the type of fruit and vegetable, Figure 5 To display the storage status of fruits and vegetables, such as the estimated current level of freshness of fruits and vegetables, the time when fruits and vegetables entered the warehouse, the storage time, various refrigeration parameter information, etc.

[0127] In the atmosphere-controlled cold storage of this embodiment, see Figure 3-5 The major categories of fruits and vegetables include many kinds, and any major category of fruits and vegetables includes several kinds of fruits and vegetables. Therefore, the database module of this embodiment stores a variety of fruit and vegetable types, thereby improving the versatility of the atmosphere-controlled cold storage in this embodiment and further improving the convenience of use for fruit farmers.

[0128] In the atmosphere-controlled cold storage of this embodiment, see Figure 2 The atmosphere-controlled cold storage includes a high-pressure ozone generator 93, which is used to sterilize the inside of the fruit and vegetable storage 1. By setting the high-pressure ozone generator 93, the ozone sterilization is turned on before the formal operation to sterilize the storage body and the surface of fruits and vegetables, thereby reducing the number of initial microorganisms.

[0129] In some embodiments, the atmosphere-controlled cold storage includes a wind alarm 11, which is located in the fruit and vegetable storage 1 and can be used to sound an alarm in the storage. For example, it can be used to alert the user to quickly leave the fruit and vegetable storage when the refrigeration operation is about to start.

[0130] Example 2

[0131] In the refrigeration method of the atmosphere-controlled cold storage of this embodiment, the refrigeration method includes:

[0132] Pre-storing fruit and vegetable storage data, the fruit and vegetable storage data including: at least one type of fruit and vegetable and storage conditions required for the corresponding fruit and vegetable;

[0133] According to the fruits and vegetables to be refrigerated in the fruit and vegetable warehouse, the selection module receives the fruit and vegetable type selection information and sets the fruit and vegetable types;

[0134] According to the set fruit and vegetable types, the storage conditions required for refrigerating fruits and vegetables in the atmosphere-controlled cold storage are obtained from the pre-stored fruit and vegetable storage data;

[0135] Automatically adjust refrigeration parameters of controlled atmosphere cold storage based on storage conditions.

[0136] In the refrigeration method of the present embodiment, a database module is built into the atmosphere-controlled cold storage to form a database of atmosphere-controlled environmental parameters for fruits and vegetables. The categories of fruits and vegetables are used as functional options. Before the fruits and vegetables begin to be refrigerated, the types of fruits and vegetables are selected with one click, so that multiple refrigeration parameters such as atmosphere-controlled gas concentration, temperature and humidity and other atmosphere-controlled environmental parameters can be set with one click, which reduces the difficulty of use for users. By selecting the types of fruits and vegetables, the most suitable control parameters for the corresponding fruits and vegetables can be called with one click and automatically adjusted in place, thereby meeting the storage conditions required for the fruits and vegetables, and solving the technical problem of complex operation settings of atmosphere-controlled cold storage in related technologies.

[0137] In the refrigeration method of this embodiment, the storage conditions include at least one of the following: setting the refrigeration temperature, setting the concentration of the controlled atmosphere gas, setting the refrigeration humidity, and the expected storage time.

[0138] In the refrigeration method of this embodiment, the method of automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions includes:

[0139] Based on the storage conditions of the atmosphere-controlled cold storage, the temperature in the fruit and vegetable storage 1 is adjusted to reach the set refrigeration temperature;

[0140] When the temperature in the fruit and vegetable storage 1 reaches the set refrigeration temperature, the concentration of the controlled atmosphere gas in the fruit and vegetable storage 1 is adjusted to reach the set controlled atmosphere gas concentration;

[0141] When the concentration of the conditioned atmosphere gas in the fruit and vegetable warehouse 1 reaches the set conditioned atmosphere gas concentration, the humidity in the fruit and vegetable warehouse 1 is adjusted to reach the set refrigerated humidity.

[0142] Specifically, after selecting the type of fruits and vegetables with one click, this stage is the operation stage of the atmosphere-controlled cold storage. The atmosphere-controlled cold storage adjusts the temperature in the fruit and vegetable warehouse 1, the concentration of the atmosphere-controlled gas in the fruit and vegetable warehouse 1, and the humidity in the fruit and vegetable warehouse 1 in sequence, so that the temperature, concentration of the atmosphere-controlled gas, and the humidity of the fruit and vegetable warehouse can match the types of fruits and vegetables to be refrigerated. After that, the long-term storage stage of this type of fruits and vegetables can be entered.

[0143] In the refrigeration method of this embodiment, the method for adjusting the temperature in the fruit and vegetable storage 1 to reach the set refrigeration temperature includes:

[0144] After controlling the refrigeration module 2 to operate at the set refrigeration temperature for a first preset time, it is determined whether the current temperature in the fruit and vegetable storage 1 reaches the set refrigeration temperature;

[0145] If the current temperature in the fruit and vegetable storage 1 does not reach the set refrigeration temperature, the refrigeration module 2 is controlled to continue refrigeration;

[0146] If the current temperature in the fruit and vegetable storage 1 reaches the set refrigeration temperature, the refrigeration module 2 is controlled to stop refrigeration.

[0147] Specifically, the first preset time is set to ensure a more uniform refrigeration effect and to ensure that the temperature in the fruit and vegetable storage 1 fully reaches the set refrigeration temperature.

[0148] In the refrigeration method of this embodiment, the controlled atmosphere gas includes at least one of the following: oxygen, carbon dioxide, and ethylene. The method for adjusting the controlled atmosphere gas concentration in the fruit and vegetable storage 1 to reach the set controlled atmosphere gas concentration includes:

[0149] The high-pressure liquefied gas-conditioning gas prepared in advance by the gas-conditioning module 3 is transported to the fruit and vegetable storage 1 and mixed with the high-pressure liquefied gas-conditioning gas in the fruit and vegetable storage 1;

[0150] Determine whether the oxygen concentration in the fruit and vegetable storage 1 reaches the set oxygen concentration;

[0151] If the oxygen concentration in the fruit and vegetable storage 1 reaches the set oxygen concentration, the delivery of the gas conditioning gas is stopped;

[0152] Determine whether other types of controlled atmosphere gases in the fruit and vegetable storage 1 have reached the set controlled atmosphere gas concentration;

[0153] If the other types of controlled atmosphere gases do not reach the set controlled atmosphere gas concentration, the concentration of the other types of controlled atmosphere gases in the fruit and vegetable warehouse 1 is reduced.

[0154] It should be noted that when the atmosphere is controlled in the atmosphere-controlled cold storage in the prior art, it is necessary to use a deoxygenator, a decarbonation machine, a deethylene machine and other individual devices to operate separately in a certain order at the beginning of refrigeration. This method of establishing an atmosphere-controlled environment is very time-consuming and requires 12 to 48 hours to complete the entire process.

[0155] In order to solve the problem that it takes a long time to establish a controlled atmosphere environment in a controlled atmosphere cold storage and that it may require consumables, a controlled atmosphere unit module is used to pre-deoxygenate and decarbonate the air before temporarily storing it in high-pressure liquefaction. During the controlled atmosphere process, rapid controlled atmosphere is achieved by decompressing the high-pressure liquefied gas and mixing it with fresh air, and a liquefied gas reserve system with low oxygen, low carbon dioxide and low ethylene is established, which solves the problem that it takes a long time to establish a controlled atmosphere environment in a controlled atmosphere cold storage and that it may require consumables.

[0156] In the refrigeration method of this embodiment, pre-treated high-pressure liquefied gas is used for gas conditioning, and all gas conditioning functions can be completed within only 1 hour. In addition, the liquefied gas will also play a significant cooling process when it is decompressed, which can also greatly shorten the subsequent cooling time and achieve a rapid pre-cooling effect.

[0157] Specifically, the deoxygenated, decarbonated and low-ethylene liquefied gas stored in the early stage is decompressed and input into the warehouse for gas conditioning. Since oxygen is the primary gas for constructing a controlled atmosphere environment and has the highest content among the controlled gases (also because the warehouse is initially filled with air, the carbon dioxide and ethylene contents are extremely low, so they are not used as the basis for inflation judgment), the oxygen concentration in the warehouse is used as the inflation shut-off point. Subsequently, if the carbon dioxide and ethylene do not reach the set carbon dioxide concentration and ethylene concentration, the decarbonation machine and deethylene machine in the controlled atmosphere cold storage are directly used to carry out separate carbon dioxide and ethylene treatment to achieve the set controlled atmosphere environment.

[0158] In the refrigeration method of this embodiment, before automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the method further includes an operation preparation stage, which includes the following steps:

[0159] Turn on the refrigeration module 2 to reduce the temperature in the fruit and vegetable storage 1 to a preset pre-cooling temperature;

[0160] Turn on the gas conditioning module 3 to prepare high-pressure liquefied gas conditioning gas and store the high-pressure liquefied gas conditioning gas;

[0161] Collect and record original images of fruits and vegetables.

[0162] In some embodiments, it is necessary to detect and record the initial odor gas concentration during the operation preparation stage, and the two gas sensor arrays respectively collect data into the odor gas detection module and record the alcohol concentration Q10, volatile acid concentration Q20, aldehyde and ketone concentration Q30, ammonia concentration Q40, and hydrogen sulfide concentration Q50 at this time, and the recorded values ​​are uploaded to the computer host and mobile phone terminal.

[0163] Specifically, in the operation preparation stage, the atmosphere-controlled cold storage is pre-cooled to reduce the time required to meet the set refrigeration temperature. At the same time, high-pressure liquefied gas is prepared and stored to prepare for subsequent rapid atmosphere control. The camera 6 and the sensor matrix 5 simultaneously collect initial data to prepare for subsequent judgment.

[0164] It should be noted that after selecting the types of fruits and vegetables, turn on the atmosphere controlled cold storage operation button, and then enter the operation preparation stage. At this time, the fruits and vegetables have been stored in place and preparations for formal refrigeration in the cold storage have begun.

[0165] In some embodiments, the following tasks need to be completed in the operation preparation stage: turn on the gas-controlled cold storage operation button, turn on the refrigeration module 2, set the temperature to the preset pre-cooling temperature (the preset pre-cooling temperature is 10-12°C), turn on the gas-controlled module 3, and set the processing parameters to deoxygenation to X0 concentration (X0 concentration is 4.5%-5.5%), carbon dioxide Y0 concentration (Y0 concentration is 0.01%-0.5%), and ethylene concentration Z0 concentration (Z0 concentration is below 20ppm). The treated gas is then pressurized by the air compressor 32 at W0 power to become deoxygenated, decarbonated, and low-ethylene liquefied air and enter the temporary storage tank 31. Positions 1 and 2 of the camera 6 respectively capture images and enter the color data processing module and record the a0*, b0*, and L0 values ​​of the fruits and vegetables at this time (the values ​​are the arithmetic mean of the two).

[0166] In the refrigeration method of this embodiment, before automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the atmosphere-controlled cold storage includes an anti-reverse locking mechanical switch 81 for preventing the inner isolation door 8 of the fruit and vegetable storage 1 from being reversely locked, and the method further includes:

[0167] Collect images in the fruit and vegetable library 1;

[0168] According to the image in the fruit and vegetable warehouse 1, determine whether there are still people in the fruit and vegetable warehouse 1;

[0169] If there are people left in the fruit and vegetable warehouse 1, the anti-reverse locking mechanical switch 81 is turned on, and the atmosphere-controlled cold storage sends out an alarm;

[0170] If there is no person remaining in the fruit and vegetable warehouse 1, it is determined whether the inner isolation door 8 is closed;

[0171] If the inner isolation door 8 is closed, the atmosphere-controlled cold storage meets the refrigeration operation conditions.

[0172] Specifically, before automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, it is necessary to determine whether the atmosphere-controlled cold storage meets the refrigeration operation conditions, mainly to determine whether there are people in the storage and whether the inner isolation door 8 is closed. Because people will suffocate in a low-oxygen environment, an alarm is issued when someone is detected in the fruit and vegetable storage 1 to fully ensure the safety of the atmosphere-controlled cold storage.

[0173] Specifically, images are collected again at positions 1 and 2 of camera 6 and enter the color data processing module. The images collected this time are used to subsequently determine whether there is anyone in the warehouse. The system AI intelligently identifies whether there are still staff members in the warehouse at a certain time interval (the time interval is preferably 5 minutes). If there are people, the wind alarm 11 will sound a wind alarm, and play a voice reminder that the atmosphere control function is about to be turned on and ask people in the warehouse to evacuate quickly. The inner isolation door 8 will automatically pop open, and the anti-lock mechanical switch 81 will be turned on to prevent the doors from being closed from the outside. If the system AI intelligent recognition does not detect that there are people in the warehouse for three consecutive times, it will continue to detect whether the inner isolation door 8 is closed. Otherwise, the alarm voice reminds to close the door.

[0174] In the refrigeration method of this embodiment, after automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the method further includes:

[0175] According to the set types of fruits and vegetables, detection is performed at every second preset time interval. When any refrigeration parameter of the atmosphere-controlled cold storage does not meet the set refrigeration parameter, the storage condition of the atmosphere-controlled cold storage is controlled to remain unchanged.

[0176] Specifically, after reaching the long-term storage stage, according to the set types of fruits and vegetables, the system performs detection every second preset time, automatically collecting temperature, humidity, oxygen content, carbon dioxide, and ethylene content for comparison with the set values ​​of this type of fruits and vegetables.

[0177] It should be noted that, in the control method of the present embodiment, once the user selects the type of fruits and vegetables to be stored, it is equivalent to setting the temperature, humidity, oxygen, carbon dioxide, ethylene and other contents of the gas cold storage in this state at the same time. Not only can it be automatically completed when establishing the cold storage storage environment without the need for the operator to set it, but also in the subsequent maintenance process, it will automatically detect and automatically compare the detected real-time data with the set value, and the limited range is also +-5% interval, and the freshness judgment of fruits and vegetables will be automatically completed. In summary, as long as the type of fruits and vegetables is selected with one click, the optimal parameters required for all the fruits and vegetables can be set at the same time. During the entire refrigeration cycle of fruits and vegetables, there is no need for the operator to interfere too much, and the operator does not need to have a strong knowledge of controlled atmosphere preservation of fruits and vegetables to achieve the refrigeration of any kind of fruits and vegetables.

[0178] In the refrigeration method of this embodiment, according to the set types of fruits and vegetables, the detection is performed at intervals of the second preset time. When any refrigeration parameter of the atmosphere-controlled cold storage does not meet the set refrigeration parameter, the method of controlling the storage conditions of the atmosphere-controlled cold storage to remain unchanged includes:

[0179] Detect various current refrigeration parameters, compare the current refrigeration parameters with the set refrigeration parameters, and obtain the change rate of various refrigeration parameters;

[0180] If the change rate of any refrigeration parameter is greater than -5% ≦ and less than ≦ +5%, the gas-controlled cold storage will not be processed;

[0181] If the change rate of any refrigeration parameter is less than -5% or greater than +5%, the refrigeration module 2 or the air conditioning module 3 or the humidifier 4 is turned on accordingly until the refrigeration parameter meets the set refrigeration parameter again.

[0182] Specifically, during the long-term storage stage, when the transfer of external heat and the respiration of fruits and vegetables generate respiratory heat, carbon dioxide, ethylene, etc., causing the atmosphere to differ greatly from the set value, the refrigeration module, atmosphere control module, humidifier, etc. can be turned on to make the atmosphere reach the set value. Compare the detected refrigeration parameters with the set refrigeration parameters of this type of fruits and vegetables. If the value is in "-5% ​​≦ (set value - current value) / set value ≦ +5%", continue to maintain it. If the value is in "(set value - current value) / set value ≤ -5% or (set value - current value) / set value ≧ +5%", it means that the refrigeration parameters deviate greatly, then the refrigeration module, atmosphere control module, and humidifier are selectively turned on in sequence, and the operation is stopped after reaching the set value.

[0183] Specifically, when any one of the temperature, humidity, and gas concentration of the controlled atmosphere deviates too much, the corresponding module is turned on accordingly, and the opening time is set to reach the fourth preset time T4. For example, if the temperature deviates too much, the refrigeration module is turned on for T4 time. After reaching T4 time, if the temperature has reached the standard, the refrigeration module is turned off. If multiple refrigeration parameters deviate too much, the refrigeration module, the controlled atmosphere module, and the humidifier are selectively turned on in sequence until the set value is reached and the operation is stopped.

[0184] In the refrigeration method of the present embodiment, the method further includes: according to the set types of fruits and vegetables, obtaining the current image of the fruits and vegetables and the current odor gas concentration in the fruit and vegetable storage 1 at every third preset time interval, judging the current freshness of the fruits and vegetables according to the original image, current image and current odor gas concentration of the fruits and vegetables, and taking processing according to the current freshness of the fruits and vegetables.

[0185] Specifically, in order to solve the problem that it is difficult to observe the freshness of fruits and vegetables in real time in a controlled atmosphere cold storage, a monitoring camera 6 is used to connect the color data processing module and the odor gas detection module to detect the color and odor gas of fruits and vegetables. The freshness is comprehensively and accurately judged by combining the color change coefficient and the odor gas threshold line, and the freshness is accurately displayed and warned in real time, solving the problem that it is difficult to accurately judge the freshness of fruits and vegetables in real time in a controlled atmosphere cold storage.

[0186] In the refrigeration method of this embodiment, the method for judging the current freshness of fruits and vegetables based on the original image, current image and current odor gas concentration of fruits and vegetables includes:

[0187] Obtain the original color information of the fruits and vegetables based on the original image of the fruits and vegetables, and obtain the current color information of the fruits and vegetables based on the current image of the fruits and vegetables;

[0188] Calculate the color change coefficient Ki of the fruits and vegetables according to the original color information and the current color information of the fruits and vegetables and the color change coefficient calculation formula;

[0189] Calculate the odor gas threshold line Qi of the fruits and vegetables according to the current odor gas concentration and the odor gas threshold line calculation formula;

[0190] Judge the current freshness of the fruits and vegetables according to the color change coefficient Ki and the odor gas threshold line Qi.

[0191] Specifically, the arithmetic mean of the image color information of two collection points can be obtained through two cameras 6, and the arithmetic mean of the odor gas values of two collection points can be obtained through two sensor matrices 5.

[0192] In the refrigeration method of this embodiment, the method for judging the current freshness of the fruits and vegetables according to the color change coefficient Ki and the odor gas threshold line Qi includes:

[0193] When 1.0 < Qi or 1.15 < Ki, the fruits and vegetables are determined to be spoiled;

[0194] When 0.4 < Qi ≤ 1.0 or 1.10 < Ki ≤ 1.15, the fruits and vegetables are determined to be third-level fresh;

[0195] When 0.2 < Qi ≤ 0.4 or 1.05 < Ki ≤ 1.10, the fruits and vegetables are determined to be second-level fresh;

[0196] When 0 ≤ Qi ≤ 0.2 and 0.95 ≤ Ki ≤ 1.05, the fruits and vegetables are determined to be first-level fresh;

[0197] Select the worst freshness among the color change coefficient Ki and the odor gas threshold line Qi as the current freshness of the fruits and vegetables. By comprehensively taking the worst freshness level determined by color and odor as the freshness of the fruits and vegetables displayed in real time, the determination accuracy is improved.

[0198] In the refrigeration method of this embodiment, the method for making a treatment according to the current freshness of the fruits and vegetables includes:

[0199] When the freshness of the fruits and vegetables is first-level fresh or second-level fresh, the background of the display operation panel 9 is displayed in green;

[0200] When the freshness of the fruits and vegetables is third-level fresh, the background of the display operation panel 9 is displayed in yellow, and the controlled atmosphere cold storage emits an alarm;

[0201] When the freshness of the fruits and vegetables is spoiled, the background of the display operation panel 9 is displayed in red, and the controlled atmosphere cold storage emits an alarm.

[0202] Specifically, when different freshness levels are determined, the color of the display operation panel 9 is switched to promptly remind the operator.

[0203] In the refrigeration method of this embodiment, the color change coefficient calculation formula is:

[0204] Ki=[(ai* / bi*) / (a0* / b0*)]×[Li / L0];

[0205] Wherein, ai* is the red-green color of the current image of fruits and vegetables, bi* is the yellow-blue color of the current image of fruits and vegetables, and Li is the brightness of the current image of fruits and vegetables;

[0206] a0* is the red and green color in the original image of fruits and vegetables, b0* is the yellow and blue color in the original image of fruits and vegetables, and L0 is the brightness in the original image of fruits and vegetables.

[0207] Specifically, the a*b* ratio change value multiplied by the L change value can avoid false alarms caused by color changes due to the normal slow ripening phenomenon of some fruits and vegetables. Even if the preservation effect is very good, fruits and vegetables will ripen after long-term storage. If a single a* / b* / L is used for judgment at this time, misjudgment may occur. At this time, the a*b* ratio change value multiplied by the L change value is used, which can effectively avoid the misjudgment phenomenon caused by a single a* / b* / L due to ripening.

[0208] In the refrigeration method of this embodiment, the calculation formula of the odor gas threshold line is:

[0209] Qi=(Q1 i / Q1)+(Q2 i / Q2)+(Q3i / Q3)+(Q4i / Q4)+(Q5 i / Q5);

[0210] Among them, Q1i is the current alcohol concentration in the fruit and vegetable warehouse 1, Q2i is the current volatile acid concentration in the fruit and vegetable warehouse 1, Q3i is the current ketone aldehyde concentration in the fruit and vegetable warehouse 1, Q4i is the current ammonia concentration in the fruit and vegetable warehouse 1, and Q5i is the current hydrogen sulfide concentration in the fruit and vegetable warehouse 1;

[0211] Q1 is the alcohol concentration threshold in the fruit and vegetable warehouse 1, Q2 is the volatile acid concentration threshold in the fruit and vegetable warehouse 1, Q3 is the ketone aldehyde concentration threshold in the fruit and vegetable warehouse 1, Q4 is the ammonia concentration threshold in the fruit and vegetable warehouse 1, and Q5 is the hydrogen sulfide concentration threshold in the fruit and vegetable warehouse 1.

[0212] Every third preset time interval, images are automatically collected to identify image information of fruits and vegetables and concentration of odorous gases. The color change coefficient K is defined to perform quantitative analysis on color changes of fruits and vegetables. When analyzing odorous gases, it is compared with the human olfactory threshold of each odor. When any odor reaches the threshold, Qi must be greater than 1, it is determined to be corrupt. Or when the sum of the ratios of the five odorous gases reaches 1, even if no single odor reaches the human olfactory threshold, it is still determined to be corrupt. The worst freshness level determined by color and odor is taken as the real-time display of the freshness of fruits and vegetables, so as to improve the accuracy of judgment. When the freshness of fruits and vegetables is low, an alarm is issued to remind timely opening of storage for sale or immediate processing.

[0213] In the refrigeration method of the present embodiment, the refrigeration method further includes: after the atmosphere-controlled cold storage meets the refrigeration operation conditions, sterilizing the fruit and vegetable storage 1 .

[0214] Specifically, after determining that the atmosphere-controlled cold storage meets the operating conditions, ozone sterilization is first turned on to sterilize the storage body and the surface of fruits and vegetables to reduce the initial number of microorganisms.

[0215] The atmosphere-controlled cold storage in this embodiment first turns on the atmosphere-controlled cold storage operation button, turns on the refrigeration module, turns on the atmosphere-controlled module and allows the generated gas (air after deoxygenation, decarbonation and ethylene removal) to enter the temporary storage tank 31 through the air compressor for storage, the camera 6 identifies the situation in the warehouse and records it with pictures, the data processing system (including the color data processing module, the odor gas detection module, the computer host and the mobile phone terminal) starts to record data, the wind alarm 11 issues an early warning, and then the system self-checks and closes the internal isolation door 8, turns on the high-pressure ozone generator 93 for ozone sterilization, and then turns off the high-pressure ozone generator 93 After reaching the set refrigeration temperature, the gas in the temporary storage tank 31 is decompressed and filled into the gas conditioning storage body. After reaching the set gas concentration of the gas conditioning, it is closed, and the ultrasonic humidification is turned on for humidification. After reaching the set refrigeration humidity, it is closed and enters the long-term storage stage; every second preset time interval, the temperature, humidity and gas concentration data are automatically collected to determine whether to perform cooling and humidification gas conditioning treatment. Every third preset time interval, the image is automatically collected and the odor is automatically detected. The freshness of fruits and vegetables is comprehensively defined by the new color change coefficient K value and the odor gas threshold line, and real-time display and early warning are performed to achieve more accurate, higher quality, more economical and simpler preservation of fruits and vegetables.

[0216] The atmosphere-controlled cold storage in this embodiment has a built-in database of atmosphere-controlled environmental parameters for fruits and vegetables, and can set the atmosphere-controlled environment by selecting fruits and vegetables with one click. The air is pre-deoxygenated and decarbonated by the atmosphere-controlled unit module and then temporarily stored in high-pressure liquefaction. During atmosphere control, rapid atmosphere control is achieved by decompressing the liquefied gas and mixing it with fresh air. The difference between the color of fruits and vegetables and the initial color is analyzed by monitoring video screenshots and the pictures are uploaded to the system for comprehensive and accurate judgment of the freshness value and early warning, thereby achieving more accurate, higher quality, more economical and simpler preservation of fruits and vegetables.

[0217] The atmosphere-controlled cold storage in this embodiment uses the fruit and vegetable category as a functional option, realizes one-click setting of atmosphere-controlled environmental parameters such as oxygen concentration, carbon dioxide concentration, ethylene control amount, temperature and humidity, establishes a liquefied gas reserve system with low oxygen, low carbon dioxide and low ethylene, monitors and records the connected color data processing module and the odor gas detection module for real-time display and early warning of freshness, and comprehensively establishes an easy-to-operate intelligent atmosphere-controlled cold storage to solve the problems of slow establishment of atmosphere-controlled environment and possible need for consumables, complex operation and setting of atmosphere-controlled cold storage, and difficulty in real-time and accurate judgment of the freshness of fruits and vegetables, thereby achieving more accurate, higher quality, more economical and simpler preservation of fruits and vegetables.

[0218] Example 3

[0219] Below is a combination of Example 1-Example 2 and Figure 7 , introduces an optional embodiment of the present invention:

[0220] Preparation stage: First, turn on the gas conditioning cold storage operation button, turn on the refrigeration module, set the temperature to pre-cooling temperature (pre-cooling temperature is 10-12°C), turn on the gas conditioning module, and set the treatment parameters to deoxygenation to X0 concentration (X0 concentration is 4.5%-5.5%), carbon dioxide Y0 concentration (Y0 concentration is 0.01%-0.5%), and ethylene concentration Z0 concentration (Z0 concentration is below 20ppm). Then the treated gas is pressurized by the air compressor 32 at W0 power to become deoxygenated and decarbonated. The low-ethylene liquefied air enters the high-pressure liquefied gas temporary storage tank 31, and the No. 1 and No. 2 positions of the camera 6 respectively collect images and enter the color data processing module and record the a0*, b0*, and L0 values ​​of the fruits and vegetables at this time (the values ​​are the arithmetic mean of the two), and the two gas sensors respectively collect data and enter the odor gas detection module and record the alcohol concentration Q10, volatile acid concentration Q20, aldehyde and ketone concentration Q30, ammonia concentration Q40, and hydrogen sulfide concentration Q50 at this time, and the recorded values ​​are uploaded to the computer host and mobile phone terminal. This stage is the preparation stage, and the gas-controlled cold storage is pre-cooled to reduce the time required to meet the set temperature value later. At the same time, the gas-controlled module stores high-pressure liquefied gas to prepare for subsequent rapid gas conditioning. The camera 6 and the gas sensor simultaneously collect initial data to prepare for subsequent judgment.

[0221] Atmosphere-controlled cold storage operation stage: Positions 1 and 2 of camera 6 collect images again and enter the color data processing module. Every fifth preset time (the fifth preset time is 5 minutes), the system AI intelligently identifies whether there are still staff in the warehouse. If so, the wind alarm 11 will sound a wind alarm, and play a voice reminder that the atmosphere-controlled function is about to be turned on, asking people in the warehouse to evacuate quickly, and automatically pop open the inner isolation door 8, and the anti-lock mechanical switch 81 is turned on to prevent the door from closing. If the system AI intelligent recognition does not detect that there are people in the warehouse for 3 consecutive times, it will detect whether the inner isolation door 8 is closed. If not, the alarm voice reminds to close the door. If so, the high-pressure ozone generator 93 will be turned on for ozone sterilization with a power of W1 for the sixth preset time (the sixth preset time is 30 to 40 minutes). The refrigeration module runs for a first preset time according to the set refrigeration temperature. The temperature detector detects whether the temperature value reaches the set refrigeration temperature set for the fruits and vegetables. If not, refrigeration continues. If the set refrigeration temperature is reached, the liquefied gas in the temporary storage tank 31 is decompressed and introduced into the gas-conditioned cold storage at a flow rate V0 at normal pressure. The set oxygen concentration Xi is used as the inflation shut-off standard. When the arithmetic mean of the two gas sensors reaches the set oxygen concentration Xi, the airflow is shut off. At this time, if the carbon dioxide concentration Ya and the ethylene concentration Za do not reach the set carbon dioxide concentration Yi and the ethylene concentration Zi, the decarbonation machine and the deethylene machine in the gas system are turned on. When the concentrations reach the carbon dioxide concentration Yi and the ethylene concentration Zi, the decarbonation machine and the deethylene machine are turned off. This stage is the operation stage of the atmosphere-controlled cold storage. Because people will suffocate in a low-oxygen environment, an alarm is sounded when someone is detected in the warehouse. When no one is in the warehouse, ozone sterilization is turned on to sterilize the warehouse and the surface of fruits and vegetables to reduce the initial number of microorganisms. Then the deoxygenated, decarbonated, and low-ethylene liquefied gas stored in the early stage is decompressed and input into the warehouse for atmosphere control. Because oxygen is the primary gas for building an atmosphere-controlled environment and has the highest content among the controlled gases (also because the initial warehouse is all air, the carbon dioxide and ethylene content are extremely low, so they are not used as the basis for inflation), the oxygen concentration in the warehouse is used as the inflation shutdown point, and then the decarbonation machine and deethylene machine in the atmosphere-controlled module are used to perform separate carbon dioxide and ethylene treatments to achieve the set atmosphere-controlled environment.

[0222] Long-term storage stage: Every second preset time interval (1 h ≤ second preset time ≤ 2 h), the temperature, humidity, oxygen content, carbon dioxide, ethylene content are automatically collected and compared with the set values. If the value is within "-5% ≤ (set value - current value) / set value ≤ +5%", it continues to be maintained. If the value is within "(set value - current value) / set value ≤ -5% or (set value - current value) / set value ≥ +5%", the refrigeration module 2, gas conditioning module 3, and humidifier 4 are selectively turned on in sequence and stop running after reaching the set value; Every third preset time interval (72 h ≤ T1 ≤ 96 h), the fruit and vegetable image information and the concentration of odor gas are automatically collected by image recognition, and the average value of the data at two collection points is taken to calculate the color change coefficient Ki (Ki = [(ai* / bi*) / (a0* / b0*)] × [Li / L0]) and the odor gas threshold line Qi (Qi = (concentration of alcohols Q1 i / Q1) + (concentration of volatile acids Q2i / Q2) + (concentration of ketones and aldehydes Q3i / Q3) + (concentration of ammonia Q4i / Q4) + (concentration of hydrogen sulfide Q5i / Q5)). When 1.0 < Qi or 1.15 < Ki, the fruit and vegetable is determined to be spoiled. When 0.4 < Qi ≤ 1.0 or 1.10 < Ki ≤ 1.15, the fruit and vegetable is determined to be third-grade fresh. When 0.2 < Qi ≤ 0.4 or 1.05 < Ki ≤ 1.10, the fruit and vegetable is determined to be second-grade fresh. When 0 ≤ Qi ≤ 0.2 and 0.95 ≤ Ki ≤ 1.05, the fruit and vegetable is determined to be first-grade fresh. That is, based on the comprehensive determination results of Ki and Qi, the worst freshness level is taken as the fruit and vegetable freshness display value. When it is determined to be first-grade or second-grade fresh, the background of the display panel (9) is displayed in green, and then this stage continues to cycle. When it is determined to be third-grade fresh, the background of the display panel (9) turns yellow and the data is transmitted to the PC side and the mobile phone side for alarm. When it is determined to be spoiled, the background of the display panel (9) turns red and the data is transmitted to the PC side and the mobile phone side for alarm. This stage is the long-term storage stage. When the transfer of external heat and the respiratory heat, carbon dioxide, ethylene, etc. generated by the respiration of fruits and vegetables cause a large difference between the gas conditioning environment and the set value, the refrigeration module, gas conditioning module, humidifier, etc. are turned on to make the gas conditioning environment reach the set value; At the same time, every third preset time interval, the fruit and vegetable image information and the concentration of odor gas are automatically collected by image recognition. The color change coefficient K is defined to quantitatively analyze the color change of fruits and vegetables (using the change value of the a*b* ratio multiplied by the change value of L, which can avoid false alarms caused by color changes due to the normal slow after-ripening phenomenon of some fruits and vegetables). When analyzing the odor gas, it is compared with the olfactory thresholds of various odors of the human body. When any one odor reaches the threshold, that is, at this time Qi must be greater than 1, it is determined to be spoiled, or when the sum of the ratios of the 5 odor gases reaches 1, although no single odor reaches the olfactory threshold of the human body at this time, it is also determined to be spoiled. Then, the worst fresh grade determined by color and odor is taken as the real-time displayed fruit and vegetable freshness to improve the determination accuracy. When the fruit and vegetable freshness is low, an alarm is issued to remind to open the warehouse for sales in time or process it immediately.

[0223] The atmosphere-controlled cold storage in this embodiment uses the fruit and vegetable category as a functional option, realizes one-click setting of atmosphere-controlled environmental parameters such as oxygen concentration, carbon dioxide concentration, ethylene control amount, temperature and humidity, establishes a liquefied gas reserve module with low oxygen, low carbon dioxide and low ethylene, monitors and records the connected color data processing module and the odor gas detection module for real-time display and early warning of freshness, and comprehensively establishes an easy-to-operate intelligent atmosphere-controlled cold storage to solve the problems of slow establishment of atmosphere-controlled environment and possible need for consumables, complex operation and setting of atmosphere-controlled cold storage, and difficulty in real-time and accurate judgment of the freshness of fruits and vegetables, thereby achieving more accurate, higher quality, more economical and simpler preservation of fruits and vegetables.

[0224] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0225] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0226] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0227] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0228] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A refrigeration method for a controlled atmosphere cold storage, characterized in that: The refrigeration method comprises: Pre-storing fruit and vegetable storage data, the fruit and vegetable storage data including: at least one type of fruit and vegetable and the corresponding storage conditions required for the fruit and vegetable; According to the fruits and vegetables to be refrigerated in the fruit and vegetable warehouse (1), the selection module receives fruit and vegetable category selection information and sets the fruit and vegetable category; According to the set fruit and vegetable types, the storage conditions required for refrigerating the fruits and vegetables in the atmosphere-controlled cold storage are obtained from the pre-stored fruit and vegetable storage data; The refrigeration parameters of the atmosphere-controlled cold storage are automatically adjusted based on the storage conditions.

2. The refrigeration method according to claim 1, characterized in that: The storage conditions include at least one of the following: set refrigeration temperature, set atmosphere controlled gas concentration, set refrigeration humidity, and estimated storage time.

3. The refrigeration method according to claim 2, characterized in that: The method for automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions includes: Based on the storage conditions of the atmosphere-controlled cold storage, adjusting the temperature in the fruit and vegetable storage (1) to reach a set refrigeration temperature; When the temperature in the fruit and vegetable storage (1) reaches the set refrigeration temperature, the concentration of the controlled atmosphere gas in the fruit and vegetable storage (1) is adjusted to reach the set controlled atmosphere gas concentration; When the concentration of the conditioned gas in the fruit and vegetable storehouse (1) reaches the set conditioned gas concentration, the humidity in the fruit and vegetable storehouse (1) is adjusted to reach the set refrigerated humidity.

4. The refrigeration method according to claim 3, characterized in that: The method for adjusting the temperature in the fruit and vegetable storage (1) to reach the set refrigeration temperature comprises: After controlling the refrigeration module (2) to operate at the set refrigeration temperature for a first preset time, determining whether the current temperature in the fruit and vegetable storage (1) reaches the set refrigeration temperature; If the current temperature in the fruit and vegetable storage (1) does not reach the set refrigeration temperature, controlling the refrigeration module (2) to continue refrigeration; If the current temperature in the fruit and vegetable storage (1) reaches the set refrigeration temperature, the refrigeration module (2) is controlled to stop refrigeration.

5. The refrigeration method according to claim 3, characterized in that: The controlled atmosphere gas includes at least one of the following: oxygen, carbon dioxide, and ethylene. The method for adjusting the controlled atmosphere gas concentration in the fruit and vegetable storage (1) to reach the set controlled atmosphere gas concentration includes: The high-pressure liquefied gas conditioning gas prepared in advance by the gas conditioning module (3) is transported into the fruit and vegetable storage (1) and mixed with the gas conditioning gas in the fruit and vegetable storage (1); Determining whether the oxygen concentration in the fruit and vegetable storage (1) reaches a set oxygen concentration; If the oxygen concentration in the fruit and vegetable storage (1) reaches a set oxygen concentration, the delivery of the gas conditioning gas is stopped; Determining whether the other types of controlled atmosphere gases in the fruit and vegetable storage (1) have reached a set controlled atmosphere gas concentration; If the other types of controlled atmosphere gases do not reach the set controlled atmosphere gas concentration, the other types of controlled atmosphere gases in the fruit and vegetable storage (1) are subjected to concentration reduction treatment.

6. The refrigeration method according to claim 2, characterized in that: Before automatically adjusting the refrigeration parameters of the atmosphere-controlled cold storage based on the storage conditions, the refrigeration method further includes an operation preparation stage, which includes the following steps: Turning on the refrigeration module (2) to reduce the temperature in the fruit and vegetable storage (1) to a preset pre-cooling temperature; Turning on the gas conditioning module (3) to prepare high-pressure liquefied gas conditioning gas and store the high-pressure liquefied gas conditioning gas; Collect and record the original images of the fruits and vegetables.

7. The refrigeration method according to claim 1, characterized in that: Before automatically adjusting the refrigeration parameters of the controlled atmosphere cold storage based on the storage conditions, the controlled atmosphere cold storage includes an anti - locking mechanical switch (81) for preventing the inner isolation door (8) of the fruit and vegetable storage (1) from being locked. The refrigeration method further includes: Collecting an image inside the fruit and vegetable storage (1); Judging whether there are still people remaining inside the fruit and vegetable storage (1) according to the image inside the fruit and vegetable storage (1); If there are people remaining inside the fruit and vegetable storage (1), the anti - locking mechanical switch (81) is turned on, and the controlled atmosphere cold storage issues an alarm; If there are no people remaining inside the fruit and vegetable storage (1), then judge whether the inner isolation door (8) is closed; If the inner isolation door (8) is already closed, the controlled atmosphere cold storage meets the refrigeration operation conditions.

8. The refrigeration method according to claim 3, characterized in that: After automatically adjusting the refrigeration parameters of the controlled atmosphere cold storage based on the storage conditions, the refrigeration method further includes: According to the set fruit and vegetable types, detecting every second preset time. When any refrigeration parameter of the controlled atmosphere cold storage does not meet the set refrigeration parameters, controlling the storage conditions of the controlled atmosphere cold storage to remain unchanged.

9. The refrigeration method according to claim 8, characterized in that: The method of detecting every second preset time according to the set fruit and vegetable types and controlling the storage conditions of the controlled atmosphere cold storage to remain unchanged when any refrigeration parameter of the controlled atmosphere cold storage does not meet the set refrigeration parameters includes: Detecting the current refrigeration parameters, comparing the current refrigeration parameters with the set refrigeration parameters, and obtaining the change rate of each refrigeration parameter; If the change rate of any refrigeration parameter is greater than - 5% and less than + 5%, the controlled atmosphere cold storage does not perform any treatment; If the change rate of any refrigeration parameter is less than - 5% or greater than + 5%, the corresponding refrigeration module (2) or controlled atmosphere module (3) or humidifier (4) is turned on until the refrigeration parameter meets the set refrigeration parameters again.

10. The refrigeration method according to claim 6, characterized in that: The refrigeration method further includes: according to the set fruit and vegetable types, obtaining the current image of the fruit and vegetables and the current concentration of odor gas inside the fruit and vegetable storage (1) every third preset time, judging the current freshness of the fruit and vegetables according to the original image, current image of the fruit and vegetables and the current concentration of odor gas, and making a treatment according to the current freshness of the fruit and vegetables.

11. The refrigeration method according to claim 10, characterized in that: The method of judging the current freshness of the fruit and vegetables according to the original image, current image of the fruit and vegetables and the current concentration of odor gas includes: Obtaining the original color information of the fruit and vegetables according to the original image of the fruit and vegetables, and obtaining the current color information of the fruit and vegetables according to the current image of the fruit and vegetables; Calculating the color change coefficient Ki of the fruit and vegetables according to the original color information, current color information of the fruit and vegetables and the color change coefficient calculation formula; Calculating the odor gas threshold line Qi of the fruit and vegetables according to the current concentration of odor gas and the odor gas threshold line calculation formula; Judging the current freshness of the fruit and vegetables according to the color change coefficient Ki and the odor gas threshold line Qi.

12. The refrigeration method according to claim 11, characterized in that: The method of judging the current freshness of the fruit and vegetables according to the color change coefficient Ki and the odor gas threshold line Qi includes: When 1.0 < Qi or 1.15 < Ki, the fruit and vegetables are determined to be spoiled; When 0.4 < Qi ≤ 1.0 or 1.10 < Ki ≤ 1.15, the fruit and vegetables are determined to be third - grade fresh; When 0.2 < Qi ≤ 0.4 or 1.05 < Ki ≤ 1.10, the fruits and vegetables are determined to be second-level fresh; When 0 ≤ Qi ≤ 0.2 and 0.95 ≤ Ki ≤ 1.05, the fruits and vegetables are determined to be first-level fresh; Select the worst freshness among the color change coefficient Ki and the odor gas threshold line Qi as the current freshness of the fruits and vegetables.

13. The refrigeration method according to claim 12, characterized in that: The method of making a treatment according to the current freshness of the fruits and vegetables includes: When the freshness of the fruits and vegetables is first-level fresh or second-level fresh, the background of the display operation panel (9) is displayed in green; When the freshness of the fruits and vegetables is third-level fresh, the background of the display operation panel (9) is displayed in yellow, and the controlled atmosphere cold storage issues an alarm; When the freshness of the fruits and vegetables is spoiled, the background of the display operation panel (9) is displayed in red, and the controlled atmosphere cold storage issues an alarm.

14. The refrigeration method according to claim 11, characterized in that: The calculation formula for the color change coefficient is: Ki = [(ai* / bi*) / (a0* / b0*)] × [Li / L0]; Wherein, ai* is the red-green chromaticity in the current image of the fruits and vegetables, bi* is the yellow-blue chromaticity in the current image of the fruits and vegetables, and Li is the brightness in the current image of the fruits and vegetables; a0* is the red-green chromaticity in the original image of the fruits and vegetables, b0* is the yellow-blue chromaticity in the original image of the fruits and vegetables, and L0 is the brightness in the original image of the fruits and vegetables.

15. The refrigeration method according to claim 11, characterized in that: The calculation formula for the odor gas threshold line is: Qi = (Q1i / Q1) + (Q2i / Q2) + (Q3i / Q3) + (Q4i / Q4) + (Q5i / Q5); Wherein, Q1i is the current alcohol concentration in the fruit and vegetable storage (1), Q2i is the current volatile acid concentration in the fruit and vegetable storage (1), Q3i is the current ketone aldehyde concentration in the fruit and vegetable storage (1), Q4i is the current ammonia concentration in the fruit and vegetable storage (1), and Q5i is the current hydrogen sulfide concentration in the fruit and vegetable storage (1); Q1 is the alcohol concentration threshold in the fruit and vegetable storage (1), Q2 is the volatile acid concentration threshold in the fruit and vegetable storage (1), Q3 is the ketone aldehyde concentration threshold in the fruit and vegetable storage (1), Q4 is the ammonia concentration threshold in the fruit and vegetable storage (1), and Q5 is the hydrogen sulfide concentration threshold in the fruit and vegetable storage (1).

16. A controlled atmosphere cold storage, comprising a fruit and vegetable storage (1) for storing fruits and vegetables to be refrigerated, characterized in that: The controlled atmosphere cold storage includes: A database module for storing fruit and vegetable storage data; A selection module for receiving the type of fruits and vegetables to be refrigerated set by the user; A control module for executing the refrigeration method of the controlled atmosphere cold storage according to any one of claims 1 to 15.

17. The atmosphere-controlled cold storage according to claim 16, characterized in that: The controlled atmosphere cold storage further includes: A refrigeration module (2) for adjusting the temperature in the fruit and vegetable storage (1), and the refrigeration module (2) is signal-connected to the control module; A controlled atmosphere module (3) including a controlled atmosphere unit for preparing high-pressure liquefied controlled atmosphere gas and a storage tank (31) for storing the high-pressure liquefied controlled atmosphere gas. The outlet of the storage tank (31) is communicated with the inside of the fruit and vegetable storage (1), and the controlled atmosphere module (3) is signal-connected to the control module; A humidifier (4), wherein the outlet of the humidifier (4) is connected to the interior of the fruit and vegetable storage (1), the humidifier (4) is used to adjust the humidity in the fruit and vegetable storage (1), and the humidifier (4) is connected to the control module signal.

18. The atmosphere-controlled cold storage according to claim 16, characterized in that: The atmosphere controlled cold storage comprises: A color data processing module, the color data processing module is used to obtain the image of the fruit and vegetable, and obtain the color information of the fruit and vegetable according to the image of the fruit and vegetable; An odorous gas detection module, the odorous gas detection module being used to obtain the concentration of odorous gas in the fruit and vegetable storage (1); The control module is respectively connected to the color data processing module and the odor gas detection module by signals to obtain the current freshness of the fruits and vegetables.

19. The atmosphere-controlled cold storage according to claim 18, characterized in that: The atmosphere-controlled cold storage comprises a sensor matrix (5), wherein the sensor matrix (5) comprises a gas sensor, and the gas sensor is used to detect the atmosphere-controlled gas concentration and the odorous gas concentration in the fruit and vegetable storage (1); The sensor matrix (5) comprises at least two, and at least two of the sensor matrices (5) are respectively arranged on the inner wall of the fruit and vegetable storage (1).

20. The atmosphere-controlled cold storage according to claim 18, characterized in that: The color data processing module comprises a camera (6), and the camera (6) is used to collect images inside the fruit and vegetable warehouse (1) and images of the fruits and vegetables; Wherein, the cameras (6) include at least two, and the at least two cameras (6) are respectively arranged on the inner wall of the fruit and vegetable storage (1).

21. The atmosphere-controlled cold storage according to claim 16, characterized in that: The atmosphere controlled cold storage comprises: A buffer room (7), the buffer room (7) being arranged between the fruit and vegetable storage (1) and the external environment, the buffer room (7) being connected to the external environment via an external isolation door; An inner isolation door (8), wherein the inner isolation door (8) is located between the buffer room (7) and the fruit and vegetable storage (1).

22. The atmosphere-controlled cold storage according to claim 21, characterized in that: The selection module comprises a display operation panel (9), and the display operation panel (9) is used to set the types of fruits and vegetables; The display operation panel (9) comprises an inner display operation panel (91) and an outer display operation panel (92); the inner display operation panel (91) is arranged at the inner isolation door (8), and the outer display operation panel (92) is arranged at the outer isolation door.

23. The atmosphere-controlled cold storage according to claim 16, characterized in that: The atmosphere-controlled cold storage comprises a high-pressure ozone generator (93), and the high-pressure ozone generator (93) is used to sterilize the interior of the fruit and vegetable storage (1).

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