Fruit and vegetable preservation equipment and its control methods

Abstract

This disclosure relates to fruit and vegetable preservation equipment and its control method. The fruit and vegetable preservation equipment includes: a cabinet (1), wherein the cabinet (1) is provided with a storage cavity for storing fruits and vegetables, and the storage cavity is provided with a first partition (14) for dividing the storage cavity into a cold storage (12) and a buffer storage (13) along a first direction (x). The cold storage (12) is located close to the installation cavity (11). The first partition (14) is provided with an openable and closable first door (15). The cabinet (1) is provided with an openable and closable second door (16) in the area corresponding to the buffer storage (13).

Description

Technical Field

[0001] This disclosure relates to the field of fruit and vegetable preservation technology, and in particular to a fruit and vegetable preservation device and its control method. Background Technology

[0002] Current cold storage facilities for fruits and vegetables are susceptible to the effects of incoming and outgoing goods, resulting in inconsistent and fluctuating refrigeration temperatures and uneven distribution of cooling energy, leading to poor preservation and storage effects. After harvesting, fruits and vegetables are placed in cold storage facilities with relatively low temperatures. When the cold storage doors are frequently opened and closed, the internal temperature is easily affected by external factors, causing large fluctuations in the internal temperature of the cold storage and making it difficult to guarantee the storage effect of fruits and vegetables. Summary of the Invention

[0003] The embodiments disclosed herein provide a fruit and vegetable preservation device and its control method, which can better improve the preservation and storage effect of fruits and vegetables.

[0004] According to a first aspect of this disclosure, a fruit and vegetable preservation device is provided, comprising:

[0005] The cabinet includes an installation cavity and a storage cavity arranged side by side along a first direction. The storage cavity is provided with a first partition to divide the storage cavity into a cold storage and a cache storage along the first direction. The cold storage is located close to the installation cavity. The first partition is provided with a first door that can be opened and closed. The cabinet is provided with a second door that can be opened and closed in the area corresponding to the cache storage.

[0006] In some embodiments, at least one of the first door and the first partition is made of thermal insulation material.

[0007] In some embodiments,

[0008] With the second door open, the first door is closed; and / or

[0009] With the first door open, the second door is closed.

[0010] In some embodiments, the fruit and vegetable preservation equipment further includes:

[0011] A first temperature sensor is used to detect the temperature inside the cold storage; and / or

[0012] The second temperature sensor is used to detect the temperature inside the cache.

[0013] In some embodiments, the fruit and vegetable preservation equipment also includes a controller.

[0014] The controller is configured to pre-cool fruits and vegetables to T in the buffer storage during the receiving process. 缓 ≤T 开 In case of +△T1, a signal is issued authorizing the opening of the first door to allow the fruits and vegetables to be transferred from the buffer warehouse to the cold storage warehouse for refrigeration; and / or

[0015] The controller is configured to, during the shipping process, after the first door opens to allow fruits and vegetables to be transferred from the cold storage to the buffer storage, maintain the temperature T inside the cold storage. 冷 ≥T 开 In the case of +△T2, a signal is issued that the first door needs to be closed, and in T 冷 ≤T 停 In the event that a signal is issued authorizing the opening of the first door;

[0016] Among them, T 开 T is the temperature at which the refrigeration equipment activates when the temperature exceeds the set temperature range. 停 This refers to the temperature at which the refrigeration equipment stops working when the temperature falls below the set temperature range.

[0017] In some embodiments, a second partition is provided inside the cabinet to separate the installation cavity and the storage cavity within the cabinet.

[0018] In some embodiments, the storage cavity is provided with an air duct extending in a first direction, and the side wall of the air duct is provided with air outlets in the areas corresponding to the cold storage and the cache.

[0019] In some embodiments, the air duct is located at the top of the storage cavity.

[0020] In some embodiments, the fruit and vegetable preservation equipment also includes a cooler fan, which is located inside the installation cavity, and the air outlet of the cooler fan is connected to the air inlet of the air duct.

[0021] In some embodiments, the air duct is a bag air duct, and multiple bag air ducts are spaced apart along a second direction, which is perpendicular to the first direction in the horizontal plane.

[0022] In some embodiments, the fruit and vegetable preservation equipment also includes a differential pressure fan, which is installed inside the installation cavity, and the outlet of the differential pressure fan is connected to the cold storage.

[0023] In some embodiments, the differential pressure fan is located in the middle region of the mounting cavity along a third direction, which is consistent with the height direction.

[0024] In some embodiments, the fruit and vegetable preservation equipment further includes a first air valve, which is closable within the air duct and configured to allow airflow within the air duct to reach the buffer when in the open state.

[0025] In some embodiments, the fruit and vegetable preservation equipment further includes a second air valve, which is closable at the air outlet end of the air duct and is configured to allow airflow in the air duct to reach the buffer from the end when open, and there is a preset distance between the air outlet end of the air duct and the end wall of the cabinet along the first direction.

[0026] In some embodiments, the fruit and vegetable preservation equipment further includes a condensing unit disposed within the installation cavity, the condensing unit comprising a condenser and a compressor.

[0027] According to a second aspect of this disclosure, a control method based on the aforementioned fruit and vegetable preservation equipment is provided, comprising: during the receiving stage, pre-cooling the fruits and vegetables to T in a buffer storage area. 缓 ≤T 开 In case of +△T1, a signal is issued authorizing the opening of the first door to allow the fruits and vegetables to be transferred from the buffer warehouse to the cold storage warehouse for refrigeration; and / or

[0028] During the shipping process, after the first door is opened to allow fruits and vegetables to be transferred from the cold storage to the buffer storage, the temperature T inside the cold storage is maintained. 冷 ≥T 开 In the case of +△T2, a signal is issued that the first door needs to be closed, and in T 冷 ≤T 停 In this case, a signal is sent authorizing the opening of the first door.

[0029] In some embodiments, the control method further includes:

[0030] In the inventory process, and assuming that the fruits and vegetables are not transferred between the cold storage and the buffer warehouse, the first door is kept closed.

[0031] In some embodiments, the fruit and vegetable preservation equipment includes an air duct, a condenser unit, a cooler, a differential pressure fan, a first air valve, and a second air valve. The air duct has air outlets in areas corresponding to the cold storage and the buffer storage. The condenser unit includes a condenser and a compressor. The air outlet of the cooler is connected to the air inlet of the air duct, and the air outlet of the differential pressure fan is connected to the cold storage. The first air valve is closable within the air duct and configured to allow airflow within the air duct to reach the buffer storage when open. The second air valve is closable at the air outlet end of the air duct and configured to allow airflow within the air duct to reach the buffer storage from the end when open. In the storage stage:

[0032] When fruits and vegetables are stored only in a buffer, the control method also includes a first temperature regulation step: based on the temperature T of the buffer... 缓 Controlling at least one of the following: the operating status of the condenser unit, the on / off status of the evaporative cooler, the operating status of the differential pressure fan, and the opening / closing status of the first and second air valves; or

[0033] When fruits and vegetables are stored only in cold storage, the control method also includes a second temperature control step: based on the temperature T of the cold storage... 冷 Controlling at least one of the following: the operating status of the condenser unit, the on / off status of the evaporative cooler, the operating status of the differential pressure fan, and the opening / closing status of the first and second air valves; or

[0034] When fruits and vegetables are stored simultaneously in both cold storage and buffer storage, the control method also includes a third temperature control step: adjusting the temperature T of the cold storage. 冷and the temperature T of the cache library 缓 It controls at least one of the following: the operating status of the condenser unit, the on / off status of the air cooler, the operating status of the differential pressure fan, the opening / closing status of the first air valve, and the opening / closing status of the second air valve.

[0035] In some embodiments, the first temperature adjustment step includes:

[0036] Keep the condensing unit in the on state; and / or

[0037] Keep the air cooler on; and / or

[0038] Set the first and second air valves to the fully open position; and / or

[0039] The compressor frequency is adjusted according to the buffer temperature T. 缓 Automatic adjustment.

[0040] In some embodiments, the second temperature adjustment step includes:

[0041] In T 冷 ≥T1, and T1≥T 开 In the following situations, the condenser unit is turned on; and / or both the evaporative cooler and the differential pressure fan are turned on; and / or both the first and second air valves are turned off; and / or the compressor frequency is adjusted according to the temperature T of the cold storage. 冷 Automatic adjustment.

[0042] In some embodiments, the second temperature adjustment step includes:

[0043] In T 停 <T 冷 ≤T2, and T2<T 开 In this case, the condenser unit is turned on; and / or the evaporative cooler is turned on and the differential pressure fan is turned off; and / or both the first and second air valves are closed; and / or the compressor frequency is adjusted according to the temperature T of the cold storage. 冷 Automatic adjustment.

[0044] In some embodiments, the second temperature adjustment step includes:

[0045] In T 冷 ≤T 停 This will cause the condenser unit to be shut down; and / or both the air cooler and the differential pressure fan to be shut down; and / or both the first air valve and the second air valve to be shut down.

[0046] In some embodiments, when fruits and vegetables are stored simultaneously in a cold storage and a buffer storage, the third temperature control step includes:

[0047] In T 冷 ≥T 开And T 缓 ≥T 开 In this case, the condenser unit is turned on; and / or the evaporative cooler is turned on and the differential pressure fan is turned off; and / or the first air valve is fully open and the second air valve is closed; and / or the compressor is operated at maximum frequency; or

[0048] In T 冷 ≥T 开 And T 停 <T 缓 <T 开 In the following situations, the condenser unit is turned on; and / or the evaporative cooler is turned on and the differential pressure fan is turned off; and / or the first air valve is opened by 1%, and the second air valve is closed; and / or the compressor frequency is adjusted according to the temperature T of the cold storage. 冷 Automatic adjustment; or

[0049] In T 冷 ≥T 开 And T 缓 <T 停 In this case, adjust according to the second temperature adjustment step.

[0050] In some embodiments, when fruits and vegetables are stored simultaneously in a cold storage and a buffer storage, the third temperature control step includes:

[0051] In T 停 <T 冷 <T 开 And T 缓 ≥T 开 In the following situations, the condenser unit is turned on; and / or the evaporative cooler is turned on and the differential pressure fan is turned off; and / or the first air valve is fully open and the second air valve is opened by 2%; and / or the compressor frequency is adjusted according to the buffer temperature T. 缓 The temperature T of the cold storage 冷、 T 开 and T 停 Sure.

[0052] In some embodiments, the compressor frequency is adjusted according to the temperature T of the buffer library. 缓 The temperature T of the cold storage 冷、 T 开 and T 停 The determination includes:

[0053] In T 冷 -T 停 >T 缓 -T 开 In this case, the compressor frequency is controlled based on a first temperature value, which is: (T冷 +T 缓 )*[T 缓 -T 开 / (T 冷 -T 停 )];or

[0054] In T 冷 -T 停 =T 缓 -T 开 In this case, the compressor frequency is according to (T) 冷 +T 缓 ) / 2 is used to control the detection temperature;

[0055] In T 冷 -T 停 <T 缓 -T 开 In this case, the compressor frequency is controlled based on a second temperature value, which is (T 冷 +T 缓 )*[(T 冷 -T 停 ) / T 缓 -T 开 ].

[0056] In some embodiments, when fruits and vegetables are stored simultaneously in a cold storage and a buffer storage, the third temperature control step includes:

[0057] In T 停 <T 冷 <T 开 And T 停 <T 缓 <T 开 In the following situations, the condenser unit is turned on; and / or the evaporative cooler is turned on and the differential pressure fan is turned off; and / or the first air valve is fully open and the second air valve is closed; and / or the compressor frequency is set according to (T 冷 +T 缓 ) / 2 is used to control the detection temperature.

[0058] In some embodiments, when fruits and vegetables are stored simultaneously in a cold storage and a buffer storage, the third temperature control step includes:

[0059] In T 停 <T 冷 <T 开 T 缓 ≤T 停 In this case, adjust according to the second temperature adjustment step.

[0060] In some embodiments, when fruits and vegetables are stored simultaneously in a cold storage and a buffer storage, the third temperature control step includes:

[0061] In T 冷 ≤T 停 And T 缓 ≥T 停 In this case, adjust according to the first temperature adjustment step; or

[0062] In T 冷 ≤T 停 And T 缓 <T 停 In the following situations, the condenser unit is shut down; and / or both the air cooler and the differential pressure fan are shut down; and / or both the first air valve and the second air valve are shut down.

[0063] The fruit and vegetable preservation equipment of this disclosure, by adding a buffer compartment, allows fruits and vegetables to be pre-cooled after harvesting before being placed in the cold storage. This not only prevents rapid cooling that could damage the taste, but also prevents temperature fluctuations caused by placing hotter fruits and vegetables directly into the cold storage, thus maintaining the low-temperature storage environment of the already stored fruits and vegetables. Furthermore, it prevents the opening of the first door when fruits and vegetables are being moved in or out of the cold storage from affecting the low-temperature storage environment inside the cold storage. When fruits and vegetables are being removed from the cold storage, they can first be moved to the buffer compartment, allowing them to gradually warm up, preventing moisture loss. Pre-positioning them in the buffer compartment facilitates easy retrieval, and opening the first door to remove the fruits and vegetables has minimal impact on the low-temperature storage environment inside the cold storage. Therefore, the freshness of the stored fruits and vegetables is guaranteed, and the energy consumption of the fruit and vegetable preservation equipment is reduced. Attached Figure Description

[0064] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation thereof. In the drawings:

[0065] Figure 1 These are schematic diagrams of some embodiments of the fruit and vegetable preservation equipment disclosed herein;

[0066] Figure 2 Flowcharts showing some embodiments of the control method for storing fruits and vegetables only in cold storage as disclosed herein;

[0067] Figure 3 The flowcharts are for some embodiments of the control method for simultaneously storing fruits and vegetables in a cold storage and a buffer storage. Detailed Implementation

[0068] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. The aspects so defined may be combined with any other aspect or aspects unless expressly stated otherwise. In particular, any feature considered preferred or advantageous may be combined with one or more other features considered preferred or advantageous.

[0069] The terms "first" and "second" used in this disclosure are merely for ease of description and to distinguish different components with the same name, and do not indicate a sequential or primary / secondary relationship.

[0070] Furthermore, when an element is referred to as being "on" another element, the element may be directly on the other element, or it may be indirectly on the other element with one or more intermediate elements inserted between them. Additionally, when an element is referred to as being "connected" to another element, the element may be directly connected to the other element, or it may be indirectly connected to the other element with one or more intermediate elements inserted between them. In the following drawings, the same reference numerals denote the same elements.

[0071] The descriptions of orientation or positional relationships using terms such as "upper," "lower," "top," "bottom," "front," "back," "inner," and "outer" in this disclosure are for the convenience of describing this disclosure only, and are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this disclosure.

[0072] This disclosure provides a fruit and vegetable preservation device, in some embodiments, such as Figure 1 As shown, it includes: a cabinet 1, which has a storage cavity for storing fruits and vegetables. The storage cavity has a first partition 14 for dividing the storage cavity into a cold storage 12 and a buffer storage 13 along the first direction x. The cold storage 12 is located near the installation cavity 11. The first partition 14 has a first door 15 that can be opened and closed. The cabinet 1 has a second door 16 that can be opened and closed in the area corresponding to the buffer storage 13.

[0073] The cabinet 1 can be a cuboid structure. For example, the first direction x can be the length direction of the cabinet 1. The cold storage 12 and the cache 13 separated by this can avoid forming a long and narrow space, which is conducive to storing fruits and vegetables. Optionally, the first direction x can also be the second direction y or the third direction z.

[0074] The cold storage 12 is used for long-term storage of fruits and vegetables, and the buffer storage 13 is used to buffer the fruits and vegetables. For example, when fruits and vegetables enter the cold storage 12, they are first pre-cooled in the buffer storage 13, or when fruits and vegetables are removed from the cold storage 12, they are temporarily stored in the buffer storage 13.

[0075] Preferably, the volume of the cold storage 12 is larger than the volume of the buffer storage 13, with the cold storage 12 serving as the main cold storage space and the buffer storage 13 only serving as a temporary storage space for fruits and vegetables. Optionally, the volume of the cold storage 12 is less than or equal to the volume of the buffer storage 13.

[0076] For example, the first door 15 can be located at the end of the cabinet 1 along the first direction x, away from the cold storage 12, to reduce the impact on the cold storage 12. The area of ​​the first door 15 can be smaller than the area of ​​the end of the cabinet 1 along the first direction x. The area of ​​the second door 16 can be smaller than the area of ​​the first partition 14. At least one of the first door 15 and the second door 16 can be opened and closed by rotation or pushing and pulling.

[0077] This embodiment, by adding a buffer chamber 13, allows fruits and vegetables to be pre-cooled after harvesting before being placed in the cold storage 12. This not only ensures rapid cooling to prevent damage to the taste but also prevents temperature fluctuations caused by placing hotter fruits and vegetables directly into the cold storage 12, thus maintaining the low-temperature storage environment. It also prevents the opening of the first door 15 when fruits and vegetables are being moved in or out of the cold storage, thus maintaining the low-temperature storage environment within the cold storage 12. When fruits and vegetables are removed from the cold storage, they can be moved from the cold storage 12 to the buffer chamber 13, allowing them to gradually warm up and preventing moisture loss. Pre-positioning them in the buffer chamber 13 facilitates easy retrieval, and opening the first door 15 to remove them minimizes disruption to the low-temperature storage environment within the cold storage 12. Therefore, the freshness of the stored fruits and vegetables is maintained, and the energy consumption of the fruit and vegetable preservation equipment is reduced.

[0078] In some embodiments, at least one of the first door 15 and the first partition 14 is made of heat-insulating material.

[0079] For example, the cabinet body 1 can be made of foamed material, and at least one of the first door 15 and the first partition 14 can also be made of foamed material. The insulation material has a high insulation coefficient, which can reduce the temperature transfer between the cold storage 12 and the buffer storage 13.

[0080] This embodiment can reduce temperature transfer between the cold storage 12 and the buffer storage 13, and easily and accurately control the target temperature within the cold storage 12 and the buffer storage 13, thereby ensuring the freshness of stored fruits and vegetables. By setting up insulation materials, the problem of temperature fluctuations in the cold storage 12 caused by incoming and outgoing goods or other external factors is solved, ensuring a constant storage temperature.

[0081] In some embodiments, when the second door 16 is in the open state, the first door 15 is in the closed state; and / or when the first door 15 is in the open state, the second door 16 is in the closed state.

[0082] In this embodiment, when the second door 16 is opened to allow fruits and vegetables to enter and exit the cabinet 1, the first door 15 is kept closed to prevent external heat from affecting the temperature of the cold storage 12 and to ensure the low-temperature storage environment of the cold storage 12. When the first door 15 is opened to transfer fruits and vegetables between the cold storage 12 and the buffer storage 13, the second door 16 is kept closed to prevent external heat from affecting the overall refrigeration environment inside the cabinet 1.

[0083] In some embodiments, the fruit and vegetable preservation equipment further includes: a first temperature sensor for detecting the temperature inside the cold storage 12; and / or a second temperature sensor for detecting the temperature inside the buffer storage 13. By setting temperature sensors, the temperature inside the two storage compartments can be precisely controlled.

[0084] In some embodiments, the fruit and vegetable preservation equipment also includes a controller configured to pre-cool the fruits and vegetables to T in the buffer 13 during the receiving process. 缓 ≤T 开 In the case of +△T1, a signal is issued allowing the first door 15 to be opened, so that fruits and vegetables can be transferred from the buffer 13 to the cold storage 12 for refrigeration. Where T... 开 △T1 is the temperature at which the refrigeration equipment will activate when the temperature exceeds the set temperature range; △T1 is the allowable temperature to exceed T. 开 The threshold is determined by setting △T1, even if T 缓 Slightly higher than T 开 This is also within an acceptable range.

[0085] Generally, the temperature inside the cold storage 12 is lower than that inside the buffer storage 13. This embodiment allows the equipment to issue a reminder when fruits and vegetables are pre-cooled to a certain temperature in the buffer storage 13, and to open the first door 15 to allow the fruits and vegetables to be moved from the buffer storage 13 into the cold storage 12 for refrigeration. This not only ensures that the fruits and vegetables cool down quickly to prevent damage to their taste, but also prevents hotter fruits and vegetables from being directly placed into the cold storage 12, causing temperature fluctuations that could affect the low-temperature storage environment of the fruits and vegetables already stored in the cold storage 12. It also prevents the first door 15 from opening when fruits and vegetables are being moved in or out of the cabinet, thus affecting the low-temperature storage environment inside the cold storage 12.

[0086] In some embodiments, the controller is configured to, during the shipping process, after the first door 15 is opened to allow fruits and vegetables to be transferred from the cold storage 12 to the buffer storage 13, maintain the temperature T within the cold storage 12. 冷 ≥T 开 In the case of +△T2, a signal is issued that requires the first door 15 to be closed, and in T 冷 ≤T 停 In the event that a signal is issued authorizing the opening of the first door 15; where T 开 T is the temperature at which the refrigeration equipment activates when the temperature exceeds the set temperature range. 停 ΔT2 is the temperature at which the refrigeration equipment stops working when the temperature falls below the set temperature range, and ΔT2 is the allowable temperature above T.开 The threshold, △T2 and △T1 are independent of each other. By setting △T2, even if T 冷 Slightly higher than T 开 This is also within an acceptable range.

[0087] In this embodiment, when fruits and vegetables are shipped, they are first transferred from the cold storage 12 to the buffer storage 13 for buffering. When T_cold ≥ T_open + ΔT2, it indicates that the temperature inside the cold storage 12 has dropped significantly due to the opening of the first door 15. At this time, the equipment can remind the user to close the first door 15 immediately. When T_cold ≤ T_stop, it indicates that the cold storage 12 has returned to a lower temperature, allowing the first door 15 to be opened again for the next transfer. After the first door 15 is closed, the fruits and vegetables can be transported from the buffer storage 13 to the outside of the cabinet 1.

[0088] By adding insulation materials, setting up a buffer zone, and intelligently controlling the opening of the first door, the temperature of the cold storage is maintained at the set value, avoiding fluctuations in the storage temperature caused by incoming and outgoing goods or other external factors.

[0089] In some embodiments, a second partition 17 is provided inside the cabinet 1 to separate the mounting cavity 11 and the storage cavity within the cabinet 1. For example, the second partition 17 may be arranged perpendicular to the first direction x, and the first partition 14 and the second partition 17 may be spaced apart. The mounting cavity 11 is used to house refrigeration equipment.

[0090] In some embodiments, the storage cavity is provided with an air duct 2 extending along the first direction x, and the side wall of the air duct 2 is provided with air outlets 21 in the corresponding areas of the cold storage 12 and the cache 13.

[0091] The air inlet of the air duct 2 can abut against the second partition 17, and the air outlet can be spaced at a predetermined distance from the end of the cabinet 1 along the first direction x. Multiple air outlets 21 can be densely distributed to achieve uniform airflow. The air outlets 21 can be fine holes to ensure uniform cooling.

[0092] In some embodiments, the air duct 2 is located at the top of the storage cavity. After the airflow is blown out, there is a circulating convection between the air duct and the fruits and vegetables stored at the bottom of the storage cavity, so that the fruits and vegetables are cooled evenly.

[0093] In some embodiments, the refrigeration equipment includes a cooler 3 disposed within the mounting cavity 11, with the air outlet of the cooler 3 connected to the air inlet of the air duct 2. The cooler 3 may also be disposed at the top of the mounting cavity, and the second partition 17 may have through holes for gas to enter the air duct 2. The cooler 3 may be installed on the second partition 17.

[0094] In some embodiments, the air duct 2 is a fabric air duct, with multiple fabric air ducts spaced apart along a second direction y, which is perpendicular to the first direction x in the horizontal plane. The fabric air duct is made of a soft, low-cost, and lightweight material. The air outlets 21 can be located on both sides of the fabric air duct along the second direction x, or they can be located along the entire circumference. The fabric air duct can be fixed to the top wall of the cabinet 1 by means of a hanging bracket.

[0095] In some embodiments, the refrigeration equipment includes a differential pressure fan 4 disposed within the mounting cavity 11, and the outlet of the differential pressure fan 4 is connected to the cold storage 12. Through holes may be provided on the second partition 17 to allow airflow into the cold storage 12. The differential pressure fan 4 may be installed on the second partition 17.

[0096] The differential pressure fan 4 can achieve a larger air volume. When fruits and vegetables are piled at the bottom of the storage chamber, it can disturb the airflow to achieve a better cooling effect and prevent the accumulation of fruits and vegetables from causing the bottom temperature to be high.

[0097] After harvesting, fruits and vegetables need to be rapidly pre-cooled before refrigerated storage. The pre-cooling speed greatly affects the storage time, so a large cooling capacity and air volume are required during the pre-cooling stage. However, during refrigerated storage, a large volume of cold air can accelerate moisture loss. By simultaneously installing a differential pressure fan 4 and a cooler fan 3, the problem of different cooling capacity and air volume requirements during the pre-cooling and storage stages of fruits and vegetables is solved. The dual air supply method achieves both high-volume differential pressure pre-cooling and uniform permeable refrigeration, meeting various storage needs of fruits and vegetables.

[0098] In some embodiments, the differential pressure fan 4 is located in the middle region of the mounting cavity 11 along the third direction z, which is consistent with the height direction.

[0099] In some embodiments, the fruit and vegetable preservation equipment further includes a first air valve 5, which is closable within the air duct 2. The first air valve 5 is positioned between the cold storage 12 and the buffer storage 13 along a first direction x, and is configured to allow airflow within the air duct 2 to reach the buffer storage 13 when open. And / or the fruit and vegetable preservation equipment further includes a second air valve 6, which is closable at the air outlet end of the air duct 2 and is configured to allow airflow within the air duct 2 to reach the buffer storage 13 from the end when open. A preset distance exists between the air outlet end of the air duct 2 and the end wall of the cabinet 1 along the first direction x. Optionally, the opening degree of the first air valve 5 and the second air valve 6 is adjustable.

[0100] This embodiment allows for flexible control of whether air is evenly distributed into the buffer chamber 13 by setting a first air valve 5, thereby maintaining the temperature of the buffer chamber 13; and allows for flexible control of whether air is rapidly distributed into the buffer chamber 13 from the end of the air duct 2 by setting a second air valve 6, thereby achieving rapid cooling; by adjusting the opening and closing status and opening degree of the two air valves in the air duct, and in conjunction with adjusting the compressor frequency, it is possible to use one refrigeration system to simultaneously control the temperature of both chambers to reach the set value.

[0101] In some embodiments, the refrigeration equipment includes a condenser unit 7 disposed within the mounting cavity 11. The condenser unit 7 includes a condenser 71 and a compressor 72. The condenser unit 7 may be located in the bottom region of the mounting cavity 11. The refrigeration equipment may also include an evaporator, which is not shown in the figure.

[0102] Secondly, this disclosure provides a control method for the fruit and vegetable preservation equipment based on the above embodiments, which includes, in some embodiments:

[0103] During the procurement process, fruits and vegetables are pre-cooled to T in buffer storage 13. 缓 ≤T 开 In the case of +△T1, a signal is issued allowing the first door 15 to be opened, so that fruits and vegetables can be transferred from the buffer 13 to the cold storage 12 for refrigeration; and / or

[0104] During the shipping process, after the first door 15 is opened to allow fruits and vegetables to be transferred from the cold storage 12 to the buffer storage 13, the temperature T inside the cold storage 12 is maintained. 冷 ≥T 开 In the case of +△T2, a signal is issued that requires the first door 15 to be closed, and in T 冷 ≤T 停 In this case, a signal is issued authorizing the opening of the first door 15.

[0105] In this embodiment, during the receiving process, once fruits and vegetables have been pre-cooled to a certain temperature in the buffer storage 13, the equipment can issue a reminder and open the first door 15 to allow the fruits and vegetables to be moved from the buffer storage 13 into the cold storage 12 for refrigeration. This not only ensures that the fruits and vegetables cool down quickly enough to prevent damage to their taste, but also prevents hotter fruits and vegetables from being directly placed into the cold storage 12, causing temperature fluctuations that could affect the low-temperature storage environment of the fruits and vegetables already stored in the cold storage 12. Furthermore, it prevents the first door 15 from opening and affecting the low-temperature storage environment inside the cold storage 12 when fruits and vegetables are being moved in or out of the cabinet.

[0106] During the shipping process, the produce is first transferred from the cold storage 12 to the buffer storage 13 for buffering. When T_cold ≥ T_open + ΔT_2, it indicates that the temperature inside the cold storage 12 has dropped significantly due to the opening of the first door 15. In this case, the equipment can alert the user to close the first door 15 immediately. When T_cold ≤ T_stop, it indicates that the cold storage 12 has returned to a lower temperature, allowing the first door 15 to be opened again for the next transfer. After the first door 15 is closed, the fruits and vegetables can be transported from the buffer storage 13 to the outside of the cabinet 1.

[0107] In some embodiments, the control method further includes:

[0108] In the storage process, and provided that the fruits and vegetables are not transferred between the cold storage 12 and the buffer storage 13, the first door 15 is kept closed.

[0109] This embodiment enables independent temperature control of the two warehouses during the inventory process, ensuring the required temperature.

[0110] In some embodiments, the fruit and vegetable preservation equipment includes an air duct 2, a condenser unit 7, a cooler 3, a differential pressure fan 4, a first air valve 5, and a second air valve 6. The air duct 2 has air outlets 21 in areas corresponding to the cold storage 12 and the buffer storage 13. The condenser unit 7 includes a condenser 71 and a compressor 72. The air outlet of the cooler 3 is connected to the air inlet of the air duct 2, and the air outlet of the differential pressure fan 4 is connected to the cold storage 12. The first air valve 5 is closable within the air duct 2 and is configured to allow airflow within the air duct 2 to reach the buffer storage 13 when open. The second air valve 6 is closable at the air outlet end of the air duct 2 and is configured to allow airflow within the air duct 2 to reach the buffer storage 13 from the end when open. In the storage stage:

[0111] When fruits and vegetables are stored only in the buffer 13, the control method also includes a first temperature regulation step: based on the temperature T of the buffer 13... 缓 Controlling at least one of the following: the operating status of the condenser unit 7, the on / off status of the air cooler 3, the operating status of the differential pressure fan 4, the opening / closing status of the first air valve 5, and the opening / closing status of the second air valve 6; or

[0112] When fruits and vegetables are stored only in cold storage 12, the control method also includes a second temperature control step: based on the temperature T of cold storage 12 冷 Controlling at least one of the following: the operating status of the condenser unit 7, the on / off status of the air cooler 3, the operating status of the differential pressure fan 4, the opening / closing status of the first air valve 5, and the opening / closing status of the second air valve 6; or

[0113] When fruits and vegetables are stored in both the cold storage 12 and the buffer storage 13, the control method further includes a third temperature adjustment step: based on the temperature T_cold of the cold storage 12 and the temperature T_slow of the buffer storage 13, control at least one of the following: the operating state of the condenser unit 7, the on / off state of the air cooler 3, the operating state of the differential pressure fan 4, the opening / closing state of the first air valve 5, and the opening / closing state of the second air valve 6.

[0114] The storage configuration is as follows: Storing fruits and vegetables solely in buffer storage 13 is suitable for situations where the storage time is short or the quantity is small, facilitating flexible transfer of produce. Storing fruits and vegetables solely in cold storage 12 is suitable for situations where long-term refrigeration is required, such as storing out-of-season fruits and vegetables or delaying sales. Storing fruits and vegetables simultaneously in both cold storage 12 and buffer storage 13 accommodates both long-term refrigeration and flexible transfer needs. Different temperature control methods are employed for each scenario because the different storage units are in a refrigerated state.

[0115] In some embodiments, the first temperature adjustment step includes:

[0116] Keep condenser unit 7 in the open state; and / or

[0117] Keep the air cooler 3 in the on state; and / or

[0118] Put the first air valve 5 and the second air valve 6 in the fully open position; and / or

[0119] The frequency of compressor 72 is adjusted according to the temperature T of buffer 13. 缓 Automatic adjustment.

[0120] In this embodiment, when the first door 15 is closed, the temperature of the buffer storage 13 containing fruits and vegetables is adjusted only by adjusting the state of the above-mentioned components to ensure the temperature of the buffer storage 13.

[0121] In some embodiments, such as Figure 2 As shown, the second temperature adjustment step includes:

[0122] In T 冷 ≥T1, and T1≥T 开 In the following situations, the condenser unit 7 is turned on; and / or both the air cooler 3 and the differential pressure fan 4 are turned on; and / or both the first air valve 5 and the second air valve 6 are turned off; and / or the frequency of the compressor 72 is adjusted according to the temperature T of the cold storage 12. 冷 Automatic adjustment.

[0123] This embodiment starts the condenser unit, air cooler, and differential pressure fan, while fully closing the first and second air valves. The compressor operates according to T. 冷 The system automatically adjusts the frequency and performs differential pressure pre-cooling; the condenser unit and air cooler lower the temperature inside the cold storage, and the large air volume of the differential pressure fan can accelerate temperature fluctuations, allowing the cold air to circulate rapidly within the fruits and vegetables, thus achieving rapid pre-cooling for large-scale fruit and vegetable storage.

[0124] In some embodiments, such as Figure 2 As shown, the second temperature adjustment step includes:

[0125] In T 停 <T 冷 ≤T2, and T2<T 开 In this case, the condenser unit is turned on; and / or the air cooler 3 is turned on and the differential pressure fan 4 is turned off; and / or the first air valve 5 and the second air valve 6 are both closed; and / or the frequency of the compressor 72 is adjusted according to the temperature T of the cold storage 12. 冷 Automatic adjustment.

[0126] This embodiment shuts down the differential pressure fan, and the compressor operates according to T. 冷The system automatically adjusts the frequency and uses a cold air blower for permeation refrigeration. The cold air blower is connected to multiple air ducts located at the top with evenly spaced openings on both sides. Cold air is blown out evenly through the small openings on both sides, making the temperature field inside the cold storage 12 uniform. At the same time, the wind speed is reduced to avoid excessive wind speed blowing onto the surface of fruits and vegetables, which would accelerate moisture loss.

[0127] In some embodiments, such as Figure 2 As shown, the second temperature adjustment step includes:

[0128] In T 冷 ≤T 停 This will cause the condenser unit 7 to be shut down; and / or both the air cooler 3 and the differential pressure fan 4 to be shut down; and / or both the first air valve 5 and the second air valve 6 to be shut down.

[0129] This embodiment can stop all equipment from working when the temperature inside the cold storage 12 is low enough to meet the shutdown temperature of the refrigeration equipment, thereby reducing energy consumption and preventing the temperature from dropping further and affecting the quality of fruits and vegetables.

[0130] In some embodiments, such as Figure 3 As shown, when fruits and vegetables are stored simultaneously in cold storage 12 and buffer storage 13, the differential pressure fan is controlled as in the second temperature control step. The third temperature control step includes:

[0131] In T 冷 ≥T 开 And T 缓 ≥T 开 In this case, the condenser unit 7 is turned on; and / or the air cooler 3 is turned on and the differential pressure fan 4 is turned off; and / or the first air valve 5 is fully open and the second air valve 6 is closed; and / or the compressor 72 is operated at maximum frequency; thus, when the temperature of both the cold storage 12 and the buffer storage 13 is high, because the cold storage 12 contains fruits and vegetables, in order to reduce moisture loss, the differential pressure fan 4 is not turned on, and the first air valve 5 is fully opened, so that cooling can be achieved at the fastest speed while achieving uniform airflow through the air duct 2;

[0132] Or in T 冷 ≥T 开 And T 停 <T 缓 <T 开 In the following situations, the condenser unit 7 is turned on; and / or the air cooler 3 is turned on and the differential pressure fan 4 is turned off; and / or the first air valve 5 is opened by 1%, and the second air valve 6 is turned off; and / or the frequency of the compressor 72 is adjusted according to the temperature T of the cold storage 12. 冷Automatic adjustment, a1% is the opening value calculated based on the current temperature requirement; thus, when the temperature of the cold storage 12 is high and the temperature of the buffer storage 13 is moderate, the first air valve 5 can be partially opened and the second air valve 6 can be closed to reduce the cold air entering the buffer storage 13. The frequency adjustment of the compressor 72 is mainly based on the temperature adjustment of the cold storage 12. The main adjustment goal is to reduce the temperature of the cold storage 12 to the target temperature, and the temperature of the buffer storage 13 is reduced slowly.

[0133] In T 冷 ≥T 开 And T 缓 <T 停 In this case, adjust according to the second temperature adjustment step. Since the temperature of the buffer storage has been reduced to meet the requirements, only the cold storage needs to be controlled separately, which is equivalent to the situation where fruits and vegetables are only stored in the cold storage.

[0134] In some embodiments, such as Figure 3 As shown, the third temperature adjustment step includes:

[0135] In T 停 <T 冷 <T 开 And T 缓 ≥T 开 In the following situations, the condenser unit 7 is turned on; and / or the air cooler 3 is turned on and the differential pressure fan 4 is turned off; and / or the first air valve 5 is fully open and the second air valve 6 is opened by a2%, where a2% is the opening value calculated based on the current temperature requirement; and / or the frequency of the compressor 72 is adjusted according to the temperature T of the buffer 13. 缓 The temperature of cold storage room 12 is T 冷、 T 开 and T 停 Sure.

[0136] This embodiment allows the first air valve 5 to be fully open and the second air valve 6 to be partially open when the temperature in the cold storage 12 is moderate and the temperature in the buffer storage 13 is relatively high. This allows more cold air to enter the buffer storage 13. Conversely, the second air valve 6 can be closed to further increase the amount of cold air entering the buffer storage 13. Because the cold storage 12 is relatively large and requires a large cooling capacity, the temperature can still be adjusted even when moderate. Therefore, the frequency of the compressor 72 can be comprehensively adjusted based on T. 缓 T 冷、 T 开 and T 停 It is determined that the main adjustment objective is to reduce the temperature of the buffer 13 to the target temperature as quickly as possible, while the temperature of the cold storage 12 is reduced to the target temperature slowly.

[0137] In some embodiments, the frequency of compressor 72 is adjusted according to the temperature T of buffer 13. 缓 The temperature of cold storage room 12 is T冷、 T 开 and T 停 The determination includes:

[0138] In T 冷 -T 停 >T 缓 -T 开 In this case, the frequency of compressor 72 is determined based on a first temperature value, which is: (T 冷 +T 缓 )*[T 缓 -T 开 / (T 冷 -T 停 )];or

[0139] In T 冷 -T 停 =T 缓 -T 开 In this case, the frequency of compressor 72 is according to (T 冷 +T 缓 ) / 2 is used to control the detection temperature;

[0140] In T 冷 -T 停 <T 缓 -T 开 In this case, the frequency of compressor 72 is determined based on the second temperature value, which is: (T 冷 +T 缓 )*[(T 冷 -T 停 ) / T 缓 -T 开 ].

[0141] In some embodiments, such as Figure 3 As shown, the third temperature adjustment step includes:

[0142] In T 停 <T 冷 <T 开 And T 停 <T 缓 <T 开 In this case, the condenser unit 7 is turned on; and / or the evaporative cooler 3 is turned on and the differential pressure fan 4 is turned off; and / or the first air valve 5 is fully open and the second air valve 6 is closed; and / or the compressor 72 is operated at a frequency according to (T 冷 +T 缓 ) / 2 is used to control the detection temperature.

[0143] This embodiment enables the first air valve 5 to be fully opened and the second air valve 6 to be closed when the temperature of the cold storage 12 and the buffer storage 13 is moderate, so that the air duct 2 can evenly supply cold air to the two storages. The frequency of the compressor 72 is controlled by detecting the average temperature of the two storages. The main adjustment goal is to make the temperature of the buffer storage 13 and the cold storage 12 slowly adjust according to the current temperature to maintain a constant storage temperature.

[0144] In some embodiments, the third temperature adjustment step includes:

[0145] In T 停 <T 冷 <T 开 T 缓 ≤T 停 In this case, the second temperature adjustment step is followed. Once the temperature of the buffer storage is reduced to meet the requirements, only the cold storage is controlled, which is different from the case where fruits and vegetables are only stored in the cold storage.

[0146] In some embodiments, when fruits and vegetables are stored simultaneously in both the cold storage 12 and the buffer 13, the third temperature control step includes:

[0147] In T 冷 ≤T 停 And T 缓 ≥T 停 In this case, adjust according to the first temperature control step. Once the cold storage temperature drops to the required level, only control the buffer storage, compared to the situation where fruits and vegetables are only stored in the buffer storage; or

[0148] In T 冷 ≤T 停 And T 缓 <T 停 In the event of a temperature drop in both chambers, the condenser unit 7 is shut down; and / or both the air cooler 3 and the differential pressure fan 4 are shut down; and / or both the first air valve 5 and the second air valve 6 are shut down. Shutting down all components when the temperature in both chambers has decreased to the required level reduces energy consumption.

[0149] The above provides a detailed description of a fruit and vegetable preservation device and its control method. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. These embodiments are merely illustrative and are intended to help understand the method and core concepts of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this disclosure.

Claims

1. A fruit and vegetable preservation device, characterized in that, include: The cabinet (1) has an installation cavity (11) and a storage cavity arranged side by side along a first direction (x) inside the cabinet (1). The storage cavity is provided with a first partition (14) for dividing the storage cavity into a cold storage (12) and a buffer storage (13) along the first direction (x). The cold storage (12) is located close to the installation cavity (11). The first partition (14) is provided with a first door (15) that can be opened and closed. The cabinet (1) is provided with a second door (16) that can be opened and closed in the area corresponding to the buffer storage (13). The storage cavity is provided with an air duct (2) extending along the first direction (x). The side wall of the air duct (2) is provided with air outlets (21) in the areas corresponding to the cold storage (12) and the buffer storage (13). A refrigeration device is installed inside the mounting cavity (11); A cold air blower (3) is installed in the mounting cavity (11), and the air outlet of the cold air blower (3) is connected to the air inlet of the air duct (2); A differential pressure fan (4) is installed in the mounting cavity (11), and the air outlet of the differential pressure fan (4) is connected to the cold storage (12); A condensing unit (7) is provided in the mounting cavity (11), the condensing unit (7) including a condenser (71) and a compressor (72); The first air valve (5) is provided in the air duct (2) in an openable and closable manner and is configured to allow the airflow in the air duct (2) to reach the buffer (13) when it is open. The second air valve (6) is closably provided at the air outlet of the air duct (2) and is configured to allow airflow in the air duct (2) to reach the buffer (13) from the end when it is open. The air outlet of the air duct (2) and the end wall of the cabinet (1) along the first direction (x) have a preset distance. and The controller is configured to, in the storage stage, when fruits and vegetables are stored only in the cache (13), adjust the temperature T of the cache (13) according to the temperature T of the cache (13). 缓 Control at least one of the following: the operating state of the condenser unit (7), the on / off state of the air cooler (3), the operating state of the differential pressure fan (4), the opening / closing state of the first air valve (5), and the opening / closing state of the second air valve (6); or, when fruits and vegetables are only stored in the cold storage (12), control the temperature T of the cold storage (12). 冷 Control at least one of the following: the operating state of the condenser unit (7), the on / off state of the air cooler (3), the operating state of the differential pressure fan (4), the opening / closing state of the first air valve (5), and the opening / closing state of the second air valve (6); or, when fruits and vegetables are stored simultaneously in the cold storage (12) and the buffer storage (13), control the temperature T of the cold storage (12). 冷 and the temperature T of the cache library (13) 缓 Control at least one of the following: the working state of the condenser unit (7), the on / off state of the air cooler (3), the working state of the differential pressure fan (4), the opening / closing state of the first air valve (5), and the opening / closing state of the second air valve (6).

2. The fruit and vegetable preservation equipment according to claim 1, characterized in that, At least one of the first door (15) and the first partition (14) is made of heat-insulating material.

3. The fruit and vegetable preservation equipment according to claim 1, characterized in that, When the second door (16) is open, the first door (15) is closed; and / or When the first door (15) is in the open state, the second door (16) is in the closed state.

4. The fruit and vegetable preservation equipment according to claim 1, characterized in that, Also includes: A first temperature sensor is used to detect the temperature inside the cold storage (12); and / or A second temperature sensor is used to detect the temperature inside the cache (13).

5. The fruit and vegetable preservation equipment according to claim 1, characterized in that, The controller is configured to pre-cool fruits and vegetables to T in the buffer (13) during the receiving process. 缓 ≤T 开 In the case of +△T1, a signal is issued allowing the first door (15) to open, so that fruits and vegetables can be transferred from the buffer (13) to the cold storage (12) for refrigeration; and / or The controller is configured to, during the shipping process, after the first door (15) is opened to allow fruits and vegetables to be transferred from the cold storage (12) to the buffer storage (13), maintain the temperature T inside the cold storage (12). 冷 ≥T 开 In the case of +△T2, a signal is issued that the first door (15) needs to be closed, and in T 冷 ≤T 停 In the event that the first door (15) is allowed to open, a signal is issued. Among them, T 开 T is the temperature at which the refrigeration equipment activates when the temperature exceeds the set temperature range. 停 The temperature at which the refrigeration equipment stops working when the temperature falls below the set temperature range.

6. The fruit and vegetable preservation equipment according to any one of claims 1 to 5, characterized in that, The cabinet (1) is provided with a second partition (17) for separating the installation cavity (11) and the storage cavity within the cabinet (1).

7. The fruit and vegetable preservation equipment according to claim 1, characterized in that, The air duct (2) is located at the top of the storage cavity.

8. The fruit and vegetable preservation equipment according to claim 1, characterized in that, The air duct (2) is a bag air duct, and multiple bag air ducts are arranged at intervals along the second direction (y), which is perpendicular to the first direction (x) in the horizontal plane.

9. The fruit and vegetable preservation equipment according to claim 1, characterized in that, The differential pressure fan (4) is located in the middle region of the mounting cavity (11) along the third direction (z), which is consistent with the height direction.

10. A control method for the fruit and vegetable preservation equipment according to any one of claims 1 to 9, characterized in that, include: During the procurement process, fruits and vegetables are pre-cooled to T in the buffer warehouse (13). 缓 ≤T 开 In the case of +△T1, a signal is issued allowing the first door (15) to open, so that fruits and vegetables can be transferred from the buffer (13) to the cold storage (12) for refrigeration; and / or During the shipping process, after the first door (15) is opened to allow fruits and vegetables to be transferred from the cold storage (12) to the buffer warehouse (13), the temperature T inside the cold storage (12) is maintained. 冷 ≥T 开 In the case of +△T2, a signal is issued that the first door (15) needs to be closed, and in T 冷 ≤T 停 In the event that the first door (15) is allowed to open, a signal is issued. In the storage process, if the fruits and vegetables are only stored in the buffer warehouse (13), the first temperature adjustment step is performed: based on the temperature T of the buffer warehouse (13) 缓 Control at least one of the following: the working state of the condenser unit (7), the on / off state of the air cooler (3), the working state of the differential pressure fan (4), the opening / closing state of the first air valve (5), and the opening / closing state of the second air valve (6); If the fruits and vegetables are stored only in the cold storage (12), the second temperature adjustment step is performed: based on the temperature T of the cold storage (12) 冷 Control at least one of the following: the working state of the condenser unit (7), the on / off state of the air cooler (3), the working state of the differential pressure fan (4), the opening / closing state of the first air valve (5), and the opening / closing state of the second air valve (6); When fruits and vegetables are stored in both the cold storage (12) and the buffer (13), a third temperature control step is performed: based on the temperature T of the cold storage (12) 冷 and the temperature T of the cache library (13) 缓 Control at least one of the following: the working state of the condenser unit (7), the on / off state of the air cooler (3), the working state of the differential pressure fan (4), the opening / closing state of the first air valve (5), and the opening / closing state of the second air valve (6).

11. The control method according to claim 10, characterized in that, Also includes: In the storage process, and provided that the fruits and vegetables are not transferred between the cold storage (12) and the buffer storage (13), the first door (15) is kept closed.

12. The control method according to claim 10, characterized in that, The first temperature adjustment step includes: The condenser unit (7) is turned on; and / or The air cooler (3) is turned on; and / or The first air valve (5) and the second air valve (6) are in the fully open state; and / or The frequency of the compressor (72) is adjusted according to the temperature T of the buffer (13). 缓 Automatic adjustment.

13. The control method according to claim 10, characterized in that, The second temperature adjustment step includes: In T 冷 ≥T1, and T1≥T 开 In this case, the condenser unit (7) is turned on; and / or the air cooler (3) and the differential pressure fan (4) are both turned on; and / or the first air valve (5) and the second air valve (6) are both turned off; and / or the frequency of the compressor (72) is adjusted according to the temperature T of the cold storage (12). 冷 Automatic adjustment.

14. The control method according to claim 10, characterized in that, The second temperature adjustment step includes: In T 停 <T 冷 ≤T2, and T2<T 开 In the following situations, the condenser unit is turned on; and / or the air cooler (3) is turned on and the differential pressure fan (4) is turned off; and / or the first air valve (5) and the second air valve (6) are both closed; and / or the frequency of the compressor (72) is adjusted according to the temperature T of the cold storage (12). 冷 Automatic adjustment.

15. The control method according to claim 10, characterized in that, The second temperature adjustment step includes: In T 冷 ≤T 停 This will cause the condenser unit (7) to be in a closed state; and / or cause the air cooler (3) and the differential pressure fan (4) to be in a closed state; and / or cause the first air valve (5) and the second air valve (6) to be in a closed state.

16. The control method according to claim 10, characterized in that, The third temperature adjustment step includes: In T 冷 ≥T 开 And T 缓 ≥T 开 In the following situations, the condenser unit (7) is turned on; and / or the air cooler (3) is turned on and the differential pressure fan (4) is turned off; and / or the first air valve (5) is fully open and the second air valve (6) is closed; and / or the compressor (72) is operated at its maximum frequency; or In T 冷 ≥T 开 And T 停 <T 缓 <T 开 In the following situations, the condenser unit (7) is turned on; and / or the air cooler (3) is turned on and the differential pressure fan (4) is turned off; and / or the first air valve (5) is opened by 1%, and the second air valve (6) is turned off; and / or the frequency of the compressor (72) is adjusted according to the temperature T of the cold storage (12). 冷 Automatic adjustment; or In T 冷 ≥T 开 And T 缓 <T 停 In this case, adjust according to the second temperature adjustment step.

17. The control method according to claim 10, characterized in that, The third temperature adjustment step includes: In T 停 <T 冷 <T 开 And T 缓 ≥T 开 In the following situations, the condenser unit (7) is turned on; and / or the air cooler (3) is turned on and the differential pressure fan (4) is turned off; and / or the first air valve (5) is fully open and the second air valve (6) is opened by 2%; and / or the frequency of the compressor (72) is adjusted according to the temperature T of the buffer (13). 缓 The temperature T of the cold storage (12) 冷、 T 开 and T 停 Sure.

18. The control method according to claim 17, characterized in that, The frequency of the compressor (72) is adjusted according to the temperature T of the buffer (13). 缓 The temperature T of the cold storage (12) 冷、 T 开 and T 停 The determination includes: In T 冷 -T 停 >T 缓 -T 开 In this case, the frequency of the compressor (72) is controlled according to a first temperature value, the first temperature value being (T 冷 +T 缓 )*[T 缓 -T 开 / (T) 冷 -T 停 )];or In T 冷 -T 停 =T 缓 -T 开 In this case, the frequency of the compressor (72) is according to (T) 冷 +T 缓 ) / 2 is used to control the detection temperature; In T 冷 -T 停 <T 缓 -T 开 In this case, the frequency of the compressor (72) is controlled according to a second temperature value, the second temperature value being (T 冷 +T 缓 )*[(T 冷 -T 停 ) / T 缓 -T 开 ].

19. The control method according to claim 10, characterized in that, The third temperature adjustment step includes: In T 停 <T 冷 <T 开 And T 停 <T 缓 <T 开 In the following situations, the condenser unit (7) is turned on; and / or the air cooler (3) is turned on and the differential pressure fan (4) is turned off; and / or the first air valve (5) is fully open and the second air valve (6) is closed; and / or the compressor (72) is turned on at a frequency according to (T 冷 +T 缓 ) / 2 is used to control the detection temperature.

20. The control method according to claim 10, characterized in that, The third temperature adjustment step includes: In T 停 <T 冷 <T 开 T 缓 ≤T 停 In this case, adjust according to the second temperature adjustment step.

21. The control method according to claim 10, characterized in that, When fruits and vegetables are stored simultaneously in the cold storage (12) and the buffer (13), the third temperature control step includes: In T 冷 ≤T 停 And T 缓 ≥T 停 In this case, adjust according to the first temperature adjustment step; or In T 冷 ≤T 停 And T 缓 <T 停 In the event of a situation where the condenser unit (7) is in a closed state; and / or the air cooler (3) and the differential pressure fan (4) are both in a closed state; and / or the first air valve (5) and the second air valve (6) are both in a closed state.

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