Refrigerator and fruit and vegetable fresh-keeping control method

Abstract

The application discloses a refrigerator and a fruit and vegetable fresh-keeping control method. A controller in the refrigerator is configured to: acquire an image of fruits and vegetables placed on an adjustable shelf collected by an image acquisition device; identify the image to obtain the type and freshness of the fruits and vegetables placed on the adjustable shelf; control a light source module to emit a light source when fresh fruits and vegetables exist on the adjustable shelf; acquire an optimal distance range corresponding to the fresh fruits and vegetables according to a preset correspondence between fruit and vegetable types and optimal distance ranges; and control the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between a minimum distance and a maximum distance. The minimum distance is the minimum value in the minimum values of all optimal distance ranges, and the maximum distance is the maximum value in the maximum values of all optimal distance ranges. The embodiment of the application can ensure the uniformity of light irradiation on fruits and vegetables, thereby improving the photosynthesis efficiency and finally improving the fresh-keeping effect of the fruits and vegetables.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerators, in particular to a refrigerator and a fruit and vegetable preservation control method. BACKGROUND

[0002] With the improvement of living standards, many consumers pay more and more attention to physical health, and it has gradually become the consensus of consumers to intake a certain amount of fruits and vegetables every day. Consumers usually store the purchased fruits and vegetables in a refrigerator. Fresh fruits and vegetables placed in the refrigerator are still a fresh and living organism and consume self-produced nutrients while carrying out various life activities.

[0003] At present, light preservation technology is introduced into the refrigerator to delay the degradation of chlorophyll, so that fruits and vegetables carry out photosynthesis under the action of light to promote the synthesis of organic matter, thereby prolonging the preservation period of fruits and vegetables. A plurality of LED lamps are arranged in the refrigerator, and the LED lamps are controlled to turn on or turn off according to a certain frequency to achieve the effect of light preservation. However, the uniformity of light in the light preservation control mode is poor, thereby affecting the photosynthesis efficiency of fruits and vegetables and the preservation effect is poor. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a refrigerator and a fruit and vegetable preservation control method, which adjusts the distance between fruits and vegetables and a light source, ensures the uniformity of light for fruits and vegetables, thereby improves the photosynthesis efficiency, and finally improves the preservation effect of fruits and vegetables.

[0005] To achieve the above purpose, the present application provides a refrigerator, comprising:

[0006] a cabinet body comprising a refrigeration chamber;

[0007] an adjustable shelf arranged in the refrigeration chamber;

[0008] a light source module arranged in the refrigeration chamber and arranged opposite to the adjustable shelf, the light source emitted by the light source module is directed to the adjustable shelf;

[0009] an image acquisition device for acquiring an image of fruits and vegetables placed on the adjustable shelf;

[0010] a controller configured to:

[0011] acquire the image of the fruits and vegetables placed on the adjustable shelf acquired by the image acquisition device;

[0012] identify the image to obtain the type and freshness of the fruits and vegetables placed on the adjustable shelf;

[0013] when there are fresh fruits and vegetables on the adjustable shelf, control the light source module to emit light;

[0014] According to the preset correspondence between the fruit and vegetable types and the optimal distance ranges, the optimal distance range corresponding to the fresh fruit and vegetable is obtained.

[0015] The adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance.

[0016] The minimum distance is the minimum value of the minimum values of all the optimal distance ranges, and the maximum distance is the maximum value of the maximum values of all the optimal distance ranges.

[0017] As an improvement of the above-mentioned scheme, after the optimal distance range corresponding to the fresh fruit and vegetable is obtained according to the preset correspondence between the fruit and vegetable types and the optimal distance ranges, the controller is further configured to:

[0018] When there is a distance interval in which all the optimal distance ranges overlap each other, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval.

[0019] When there is no distance interval in which all the optimal distance ranges overlap each other, the weight of the fresh fruit and vegetable is obtained.

[0020] According to all the weights, the type of the heaviest fruit and vegetable is determined.

[0021] When the type of the heaviest fruit and vegetable is only one, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the optimal distance range corresponding to the heaviest fruit and vegetable.

[0022] When the type of the heaviest fruit and vegetable includes at least two types, the average value of the optimal distance range corresponding to each type of the heaviest fruit and vegetable is calculated.

[0023] All the average values are compared to obtain the minimum average value and the maximum average value.

[0024] The adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

[0025] As an improvement of the above-mentioned scheme, the correspondence between the fruit and vegetable types and the optimal distance ranges is constructed by the following steps:

[0026] The light source module is controlled to emit light.

[0027] For each type of fresh fruit and vegetable, the following operations are performed:

[0028] The fresh fruit and vegetable is placed under the light source, and the preservation period of the fresh fruit and vegetable under different distances between the adjustable shelf and the light source module is obtained.

[0029] Obtaining all distances corresponding to the preservation period greater than the preset period threshold, and utilizing the minimum value and the maximum value in the all distances to form a best distance range corresponding to the fresh fruit and vegetable.

[0030] As an improvement of the above scheme, the light source module comprises a plurality of identical light source areas; and the adjustable shelf is provided with a placement area corresponding to each light source area.

[0031] Therefore, the controller is further configured to:

[0032] Obtaining the freshness of the fruit and vegetable in the placement area;

[0033] When there is fresh fruit and vegetable in the placement area, controlling the light source area corresponding to the placement area to emit light source;

[0034] When there is no fresh fruit and vegetable in the placement area, controlling the light source area corresponding to the placement area not to emit light source.

[0035] As an improvement of the above scheme, the light source module is uniformly arranged with a plurality of red LED lamps and a plurality of blue LED lamps; wherein, the red LED lamps and the blue LED lamps are alternately arranged.

[0036] As an improvement of the above scheme, after the image is identified to obtain the type and freshness of the fruit and vegetable placed on the adjustable shelf, the controller is further configured to:

[0037] When there is no fresh fruit and vegetable on the adjustable shelf, controlling the light source module not to emit light source.

[0038] To achieve the above object, the embodiment of the present application provides a fruit and vegetable preservation control method of a refrigerator, the refrigerator at least comprising: an adjustable shelf arranged in a refrigerating chamber and a light source module arranged in the refrigerating chamber and opposite to the adjustable shelf, light source emitted by the light source module being towards the adjustable shelf, the fruit and vegetable preservation control method of the refrigerator comprising:

[0039] Obtaining an image of the fruit and vegetable placed on the adjustable shelf;

[0040] Identifying the image to obtain the type and freshness of the fruit and vegetable placed on the adjustable shelf;

[0041] When there is fresh fruit and vegetable on the adjustable shelf, controlling the light source module to emit light source;

[0042] According to a preset corresponding relationship between fruit and vegetable type and best distance range, obtaining a best distance range corresponding to fresh fruit and vegetable;

[0043] controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance;

[0044] wherein the minimum distance is the minimum value of the minimum values of all the optimal distance ranges, and the maximum distance is the maximum value of the maximum values of all the optimal distance ranges.

[0045] As an improvement of the above-mentioned scheme, after obtaining the optimal distance range corresponding to the fresh fruit and vegetable according to the correspondence between the preset fruit and vegetable type and optimal distance range, the fruit and vegetable preservation control method of the refrigerator further comprises:

[0046] when there is a distance interval in which all the optimal distance ranges overlap each other, controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval;

[0047] when there is no distance interval in which all the optimal distance ranges overlap each other, obtaining the weight of the fresh fruit and vegetable;

[0048] according to all the weights, confirming the type of the heaviest fruit and vegetable;

[0049] when the type of the heaviest fruit and vegetable is only one, controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the optimal distance range corresponding to the heaviest fruit and vegetable;

[0050] when the type of the heaviest fruit and vegetable includes at least two, calculating the average value of the optimal distance range corresponding to each type of the heaviest fruit and vegetable;

[0051] comparing all the average values to obtain the minimum average value and the maximum average value;

[0052] controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

[0053] As an improvement of the above-mentioned scheme, the correspondence between the fruit and vegetable type and the optimal distance range is constructed by the following steps:

[0054] controlling the light source module to emit light;

[0055] for each type of fresh fruit and vegetable, the following operations are performed:

[0056] obtaining the preservation period of the fresh fruit and vegetable under different distances between the adjustable shelf and the light source module under the light source;

[0057] All distances corresponding to the fresh-keeping period greater than a preset period threshold are obtained, and the minimum and maximum values ​​of all the distances are used to form an optimal distance range corresponding to fresh fruits and vegetables.

[0058] As an improvement of the above solution, the light source module includes a plurality of identical light source areas; the adjustable shelf is provided with a placement area corresponding to each of the light source areas;

[0059] Then, the fruit and vegetable preservation control method of the refrigerator further includes:

[0060] Obtaining the freshness of fruits and vegetables in the placement area;

[0061] When fresh fruits and vegetables are present in the placement area, the light source area corresponding to the placement area is controlled to emit light;

[0062] When there are no fresh fruits and vegetables in the placement area, the light source area corresponding to the placement area is controlled not to emit light.

[0063] Compared with the prior art, the embodiment of the present invention provides a refrigerator and a method for controlling the preservation of fruits and vegetables thereof. When fresh fruits and vegetables are present on the adjustable shelf, the light source module is controlled to emit a light source; based on the correspondence between the preset fruit and vegetable types and the optimal distance range, the optimal distance range corresponding to the fresh fruits and vegetables is obtained; the adjustable shelf is controlled to move up and down so that the distance between the adjustable shelf and the light source module after movement is between the minimum distance and the maximum distance; wherein the minimum distance is the minimum value among all the minimum values ​​of the optimal distance range, and the maximum distance is the maximum value among all the maximum values ​​of the optimal distance range. It can be seen that the embodiment of the present invention moves the adjustable shelf to a suitable position so that the uniformity of light received by the fruits and vegetables and the uniformity of light are optimal, thereby improving the photosynthesis efficiency of the fruits and vegetables and ultimately improving the preservation effect of the fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 This is a structural perspective diagram of a refrigerator provided by an embodiment of the present invention;

[0065] Figure 2 1 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0066] Figure 3 1 is a schematic structural diagram of a fan provided by an embodiment of the present invention;

[0067] Figure 4 This is a first working flow diagram of the controller provided by an embodiment of the present invention;

[0068] Figure 5 is a second working flow diagram of the controller provided by an embodiment of the present invention;

[0069] Figure 6 is a third working flowchart of the controller provided by the embodiment of the present application;

[0070] Figure 7 is a fourth working flowchart of the controller provided by the embodiment of the present application;

[0071] Figure 8 is a LED lamp distribution schematic diagram of each light source region provided by the embodiment of the present application;

[0072] Figure 9 is a LED lamp distribution schematic diagram of the light source module provided by the embodiment of the present application;

[0073] Figure 10 is a flowchart of a fruit and vegetable fresh-keeping control method of a refrigerator provided by the embodiment of the present application;

[0074] In the refrigerator, 100 is a cabinet, 200 is an adjustable shelf, 1 is a compressor, 2 is a condenser, 3 is an anti-condensation pipe, 4 is a drying filter, 5 is a capillary tube, 6 is an evaporator, 7 is a gas-liquid separator, and 8 is a fan. DETAILED DESCRIPTION

[0075] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0076] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0077] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0078] Figure 1is a perspective view of a refrigerator according to an embodiment of the present application. Referring to Figure 1 The refrigerator of the present embodiment has a shape close to a cuboid, and includes a cabinet 100 defining a storage space and a plurality of door bodies provided at openings of the cabinet 100. The door body includes a door body outer shell located outside the cabinet 100, a door body inner container located inside the cabinet 100, an upper end cover, a lower end cover, and a thermal insulation layer located between the door body outer shell, the door body inner container, the upper end cover, and the lower end cover. Generally, the thermal insulation layer is filled with foaming material. The cabinet 100 is provided with a cavity, which includes a component storage cavity for placing components in the refrigerator, such as a compressor, and a storage space for storing food and the like. The storage space can be divided into a plurality of storage compartments, which can be configured as refrigeration compartments, freezing compartments, and variable-temperature compartments (also referred to as fresh-keeping compartments) according to different purposes. Each storage compartment is provided with one or more door bodies. For example, in Figure 1 the upper storage compartment is provided with a double-door body. The door body can be pivotally arranged at the opening of the cabinet, or can be a drawer type to achieve drawer type storage.

[0079] The refrigeration compartment is also provided with an adjustable shelf 200. The shelf driving device is arranged in the refrigerator to control the up-and-down movement of the adjustable shelf 200.

[0080] The refrigeration compartment is also provided with a light source module, which is arranged opposite to the adjustable shelf 200 and emits light towards the adjustable shelf 200. The light source module can be arranged at the middle region of the top end of the refrigeration compartment, and the light emitted by the light source module has a light preservation effect and can irradiate the adjustable shelf 200.

[0081] The refrigerator is also provided with an image acquisition device for acquiring images of fruits and vegetables placed on the adjustable shelf 200. The image acquisition device can be arranged above the adjustable shelf 200 and located inside the refrigeration compartment, such as the top end of the refrigeration compartment, or the image acquisition device can be arranged above the adjustable shelf 200 and located outside the refrigeration compartment, such as the top end of the door body. The image acquisition device has a visual angle range capable of covering the entire adjustable shelf 200 region, so as to ensure that images of all fruits and vegetables placed on the adjustable shelf 200 are acquired.

[0082] Referring to Figure 2 , Figure 2 is a structural schematic diagram of a refrigeration system in a refrigerator according to an embodiment of the present application. The refrigeration system includes a compressor 1, a condenser 2, an anti-condensation pipe 3, a drying filter 4, a capillary tube 5, an evaporator 6, and a gas-liquid separator 7. The working process of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

[0083] The compression process is that when the power cord of the refrigerator is plugged in and the contact of the temperature controller is connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked into the compressor 1, is compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor 1, and is discharged into the condenser 2; the condensation process is that the high-temperature and high-pressure refrigerant gas is cooled by the condenser 2, the temperature is lowered continuously, and is gradually cooled into saturated steam at normal temperature and high pressure, and is further cooled into saturated liquid, and the temperature no longer decreases, and the temperature at this time is called the condensation temperature, and the pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is that the saturated liquid refrigerant after condensation is filtered to remove water and impurities by the drying filter 4, and then flows into the capillary tube 5, and is throttled and decompressed by the capillary tube 5, and the refrigerant becomes wet steam at normal temperature and low pressure; the evaporation process is that the wet steam at normal temperature and low pressure starts to absorb heat to vaporize in the evaporator 6, not only the temperature of the evaporator and its surrounding is lowered, but also the refrigerant is changed into low-temperature and low-pressure gas, and the refrigerant coming out of the evaporator 6 is returned to the compressor 1 again after passing through the gas-liquid separator 7, and the above process is repeated, the heat in the refrigerator is transferred to the air outside the box, and the purpose of refrigeration is achieved.

[0084] Referring to Figure 3 , Figure 3 The structure diagram of the fan in the refrigerator provided by the embodiment of the application is shown in Figure 1, the fan 8 makes the air continuously enter the fins of the evaporator 6 for heat exchange, and the air cooled by the evaporator 6 is sent to the refrigerating chamber and the freezing chamber through the air duct, so that the air in the storage chamber continuously circulates to achieve the purpose of reducing the temperature.

[0085] The refrigerator provided by the embodiment of the application further comprises a controller, and the controller is used for:

[0086] acquiring the image of the fruit and vegetable placed on the adjustable shelf collected by the image acquisition device;

[0087] identifying the image to obtain the type and freshness of the fruit and vegetable placed on the adjustable shelf;

[0088] controlling the light source module to emit light when there is fresh fruit and vegetable on the adjustable shelf;

[0089] acquiring the optimal distance range corresponding to the fresh fruit and vegetable according to a preset corresponding relationship between the type of fruit and vegetable and the optimal distance range;

[0090] controlling the adjustable shelf to move up and down so that the distance between the adjustable shelf after moving and the light source module is between the minimum distance and the maximum distance;

[0091] The minimum distance is the minimum value of the minimum values of all the optimal distance ranges, and the maximum distance is the maximum value of the maximum values of all the optimal distance ranges.

[0092] For example, referring to Figure 4 , Figure 4 is a first workflow diagram of a controller provided by an embodiment of the application, and the controller is used to execute steps S11-S15.

[0093] S11, acquiring an image of fruits and vegetables placed on the adjustable shelf collected by the image acquisition device, and entering step S12.

[0094] S12, identifying the image to obtain the type and freshness of the fruits and vegetables placed on the adjustable shelf, and entering step S13.

[0095] S13, determining whether there are fresh fruits and vegetables on the adjustable shelf, if yes, entering step S14, and if no, returning to step S11.

[0096] S14, controlling the light source module to emit light sources, and acquiring the optimal distance range corresponding to the fresh fruits and vegetables according to the preset correspondence between the fruit and vegetable type and the optimal distance range, and entering step S15.

[0097] S15, controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance; wherein the minimum distance is the minimum value of the minimum values of all the optimal distance ranges, and the maximum distance is the maximum value of the maximum values of all the optimal distance ranges.

[0098] It can be understood that the refrigerator provided by the embodiment of the application can also be provided with a distance sensor, which is located in the same horizontal plane as the light source module, and is used to detect the distance between the adjustable shelf and the light source module. For example, the light source module and the distance sensor are both arranged at the top end inside the refrigerating chamber.

[0099] Specifically, the collected fruit and vegetable images are recognized to obtain the fruit and vegetable types and their freshness. When there is fruit and vegetable with fresh freshness on the adjustable shelf, it means that the fruit and vegetable can perform photosynthesis and enter the promotion of organic matter synthesis to prolong the preservation period. At this time, the light source module is controlled to emit light sources so that the fresh fruit and vegetable receiving the light sources can perform photosynthesis and prolong the preservation period. At the same time, in order to ensure the best light uniformity, the best distance range corresponding to the fresh fruit and vegetable with fresh freshness is obtained. For example, when there are multiple fresh fruit and vegetables, the best distance range corresponding to each fresh fruit and vegetable is obtained. Within the corresponding best distance range, the fresh fruit and vegetable of this type can receive the best light uniformity. At this time, the minimum values of all the best distance ranges are compared to obtain the minimum value among the minimum values of all the best distance ranges. The minimum value obtained after comparison is taken as the minimum distance. The maximum values of all the best distance ranges are compared to obtain the maximum value among the maximum values of all the best distance ranges. The maximum value obtained after comparison is taken as the maximum distance. For example, fresh fruit and vegetable A, fresh fruit and vegetable B, and fresh fruit and vegetable C are placed on the adjustable shelf. The best distance range corresponding to fresh fruit and vegetable A is H1-H2. The best distance range corresponding to fresh fruit and vegetable B is H3-H4. The best distance range corresponding to fresh fruit and vegetable C is H5-H6. H1, H3, and H5 are compared to obtain the minimum value among them, which is taken as the minimum distance. H2, H4, and H6 are compared to obtain the maximum value among them, which is taken as the maximum distance. Finally, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance. Between the minimum distance and the maximum distance, the fruit and vegetable can receive the best light uniformity, ensure the photosynthesis effect, and achieve the best preservation effect.

[0100] In an optional embodiment, after the best distance range corresponding to the fresh fruit and vegetable is obtained according to the correspondence between the preset fruit and vegetable types and the best distance range, the controller is further configured to:

[0101] When there is a distance interval in which all the best distance ranges coincide with each other, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval.

[0102] When there is no distance interval in which all the best distance ranges coincide with each other, the weight of the fresh fruit and vegetable is obtained.

[0103] According to all the weights, the type of the heaviest fruit and vegetable is determined.

[0104] when the type of the heaviest fruits and vegetables includes at least two, calculating an average value of the optimal distance range corresponding to each type of the heaviest fruits and vegetables;

[0105] when the type of the heaviest fruits and vegetables includes at least two, calculating an average value of the optimal distance range corresponding to each type of the heaviest fruits and vegetables;

[0106] comparing all the average values to obtain a minimum average value and a maximum average value;

[0107] controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

[0108] For example, refer to Figure 5 , Figure 5 is a second working flowchart of a controller provided by an embodiment of the present application, and the controller is used to execute steps S21-S29:

[0109] S21, judging whether there is a distance interval in which all the optimal distance ranges coincide with each other; if yes, going to step S22, and if no, going to step S23;

[0110] S22, controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval;

[0111] S23, obtaining the weight of the fresh fruits and vegetables, and going to step S24;

[0112] S24, according to all the weights, confirming the type of the heaviest fruits and vegetables, and going to step S25;

[0113] S25, judging whether the type of the heaviest fruits and vegetables is only one; if yes, going to step S26, and if no, going to step S27;

[0114] S26, controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the optimal distance range corresponding to the heaviest fruits and vegetables;

[0115] S27, calculating an average value of the optimal distance range corresponding to each type of the heaviest fruits and vegetables, and going to step S28;

[0116] S28, comparing all the average values to obtain a minimum average value and a maximum average value, and going to step S29;

[0117] S29, controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

[0118] It can be understood that, in order to further improve the preservation effect and obtain more accurate distance between the adjustable shelf and the light source module, specifically, the distance between the adjustable shelf and the light source module is further reduced according to the overlapping part of the optimal distance range and the weight of the fresh fruits and vegetables, and the preservation effect is improved. More specifically, it is determined whether there is a distance interval in which all the optimal distance ranges overlap each other, for example, the fresh fruits and vegetables A, fresh fruits and vegetables B and fresh fruits and vegetables C are placed on the adjustable shelf, the optimal distance range corresponding to the fresh fruits and vegetables A is H1-H2, the optimal distance range corresponding to the fresh fruits and vegetables B is H3-H4, and the optimal distance range corresponding to the fresh fruits and vegetables C is H5-H6. When H1-H2, H3-H4 and H5-H6 all overlap each other, the distance interval in which H1-H2, H3-H4 and H5-H6 all overlap each other is obtained, and the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval. When H1-H2, H3-H4 and H5-H6 do not have overlapping parts, for example, H1-H2 and H3-H4 have overlapping parts, and H3-H4 and H5-H6 do not have overlapping parts, the weights of the fresh fruits and vegetables A, B and C are obtained. If it is determined that the fresh fruits and vegetables A are the heaviest, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the optimal distance range H1-H2 corresponding to the fresh fruits and vegetables A. If it is determined that the fresh fruits and vegetables A and the fresh fruits and vegetables B are equal in weight and are the heaviest, the average value of the optimal distance range corresponding to each kind of the heaviest fruits and vegetables is calculated and and are compared to obtain the minimum average value and the maximum average value, and the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

[0119] It can be understood that the weight of the fresh fruits and vegetables can be obtained by a weight sensor or a food management module or a weight input by a user. The food management module includes a tag and a read-write unit, and the weight of the fruits and vegetables is pre-stored in the tag. The weight of the fruits and vegetables is obtained by reading the tag through the read-write unit.

[0120] In an optional embodiment, the correspondence between the fruit and vegetable types and the optimal distance range is constructed by the following steps:

[0121] controlling the light source module to emit light.

[0122] For each type of fresh fruit and vegetable, the following operation is performed:

[0123] The fresh-keeping period of the fresh fruit and vegetable under the light source at different distances between the adjustable shelf and the light source module is obtained.

[0124] All distances corresponding to the fresh-keeping period greater than the preset period threshold are obtained, and the minimum value and the maximum value in the all distances are used to form the optimal distance range corresponding to the fresh fruit and vegetable.

[0125] For example, refer to Figure 6 , Figure 6 is a third workflow diagram of a controller provided by an embodiment of the present application, and the controller is used to perform steps S31-S33.

[0126] S31, control the light source module to emit light source, and proceed to step S32.

[0127] S32, for each type of fresh fruit and vegetable, the fresh-keeping period of the fresh fruit and vegetable under the light source at different distances between the adjustable shelf and the light source module is obtained, and proceed to step S33.

[0128] S33, for each type of fresh fruit and vegetable, all distances corresponding to the fresh-keeping period greater than the preset period threshold are obtained, and the minimum value and the maximum value in the all distances are used to form the optimal distance range corresponding to the fresh fruit and vegetable.

[0129] It can be understood that in the embodiment of the present application, the same type of fresh fruit and vegetable is placed on the adjustable shelf, the light source module is controlled to emit light source, at this time, the adjustable shelf is controlled to move up and down, the fresh-keeping period of the fresh fruit and vegetable at different distances is obtained, when the fresh-keeping period is greater than the preset period threshold, the distance corresponding to the fresh-keeping period is recorded, the minimum value and the maximum value in the recorded distance are used as the optimal distance range corresponding to the fresh fruit and vegetable, and the above operation is repeated for each type of fresh fruit and vegetable to establish the correspondence between the fruit and vegetable type and the optimal distance range.

[0130] In an optional embodiment, the light source module includes a plurality of same light source regions; and the adjustable shelf is provided with a placement region corresponding to each light source region.

[0131] Therefore, the controller is further used to:

[0132] Obtain the freshness of the fruit and vegetable in the placement region.

[0133] When there is fresh fruit and vegetable in the placement region, control the light source region corresponding to the placement region to emit light source.

[0134] When there is no fresh fruit and vegetable in the placement area, the light source area corresponding to the placement area is controlled not to emit light source.

[0135] For example, as shown in Figure 7 , Figure 7 is a fourth working flowchart of the controller provided in the embodiment of the present application, and the controller is used for executing steps S41-S44:

[0136] S41, the freshness of fruit and vegetable in the placement area is acquired, and step S42 is entered;

[0137] S42, it is judged whether the placement area stores fruit and vegetable with fresh freshness, if yes, step S43 is entered, and if no, step S44 is entered;

[0138] S43, the light source area corresponding to the placement area is controlled to emit light source;

[0139] S44, the light source area corresponding to the placement area is controlled not to emit light source.

[0140] For example, as shown in Figure 8 , the light source module is divided into four same light source areas, including areas ①-④, each light source area is uniformly distributed with four red and blue alternating LED lamps, each light source area is a sub-light source module, the controller can control each sub-light source module individually, and the adjustable shelf is also divided into four areas according to the light source area; when there is fresh fruit and vegetable in a placement area, the sub-light source module corresponding to the placement area is controlled to emit light source, when there is no fresh fruit and vegetable in a placement area, the sub-light source module corresponding to the placement area is controlled not to emit light source, the light source is started as needed, and the purpose of energy saving is achieved.

[0141] In an optional embodiment, the light source module is uniformly arranged with a plurality of red LED lamps and a plurality of blue LED lamps; wherein the red LED lamps and the blue LED lamps are alternately arranged.

[0142] It should be noted that the distribution of light source also affects the uniformity of illumination, and the uniformity of illumination affects the photosynthesis efficiency, and then affects the preservation effect. Therefore, in the embodiment of the present application, the LED lamps are uniformly arranged on the light source module, and the red LED lamps and the blue LED lamps are alternately arranged, so that the fruit and vegetable receives the best uniformity of illumination, and the preservation effect is better. For example, as shown in Figure 9 , the arrangement of the LED lamps in each light source area is the same, and the left-right interval and the up-down interval of any two adjacent LED lamps are the same, both are L.

[0143] In an optional embodiment, after the image is recognized to obtain the type and freshness of the fruits and vegetables placed on the adjustable shelf, the controller is further configured to:

[0144] When there is no fresh fruits and vegetables on the adjustable shelf, the light source module is controlled to not emit light.

[0145] It should be noted that when the fruits and vegetables are determined to be not fresh, the fruits and vegetables are in a poor state, and the light irradiation cannot increase the preservation effect, and the light irradiation may increase the transpiration and accelerate the water loss of the fruits and vegetables, which is not conducive to preservation. Therefore, when there is no fresh fruits and vegetables on the adjustable shelf, the light source module is controlled to not emit light, so as to avoid accelerating the wilting of the fruits and vegetables and reduce the energy consumption.

[0146] The refrigerator provided in the embodiment of the present application controls the light source module to emit light when there is fresh fruits and vegetables on the adjustable shelf, obtains the optimal distance range corresponding to the fresh fruits and vegetables according to the preset correspondence between the type of fruits and vegetables and the optimal distance range, and controls the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance. The minimum distance is the minimum value of the minimum values of all the optimal distance ranges, and the maximum distance is the maximum value of the maximum values of all the optimal distance ranges. As can be seen, the adjustable shelf is moved to a suitable position in the embodiment of the present application, so that the uniformity of light irradiation received by the fruits and vegetables and the uniformity of light irradiation reach the best, thereby improving the photosynthesis efficiency of the fruits and vegetables and finally improving the preservation effect of the fruits and vegetables.

[0147] Referring to Figure 10 , Figure 10 is a flowchart of a fruits and vegetables preservation control method of a refrigerator provided in the embodiment of the present application. The refrigerator at least includes an adjustable shelf arranged in a refrigerating chamber and a light source module arranged in the refrigerating chamber and opposite to the adjustable shelf. The light source emitted by the light source module is directed to the adjustable shelf. The fruits and vegetables preservation control method of the refrigerator includes the following steps.

[0148] s1, obtaining an image of fruits and vegetables placed on the adjustable shelf;

[0149] s2, recognizing the image to obtain the type and freshness of the fruits and vegetables placed on the adjustable shelf;

[0150] S3, when there is fresh fruits and vegetables on the adjustable shelf, controlling the light source module to emit light.

[0151] S4, obtaining the optimal distance range corresponding to the fresh fruits and vegetables according to the preset correspondence between the type of fruits and vegetables and the optimal distance range.

[0152] S5, control the adjustable shelf to move up and down, so that the distance between the adjustable shelf after moving and the light source module is between the minimum distance and the maximum distance;

[0153] Wherein, the minimum distance is the minimum value of the minimum value of all the optimal distance range, and the maximum distance is the maximum value of the maximum value of all the optimal distance range.

[0154] Specifically, the refrigerator is provided with an adjustable shelf inside the refrigeration chamber; the adjustable shelf is controlled to move up and down by a shelf driving device; wherein the shelf driving device is arranged inside the refrigerator and used to control the adjustable shelf to move up and down.

[0155] The refrigeration chamber is also provided with a light source module, which is arranged opposite to the adjustable shelf, and the light source emitted by the light source module is directed to the adjustable shelf; specifically, the light source module can be arranged at the middle area of the top end inside the refrigeration chamber, and the light source emitted by the light source module has a light preservation effect and can irradiate the adjustable shelf.

[0156] The refrigerator is also provided with an image acquisition device, which is used to acquire the image of the fruits and vegetables placed on the adjustable shelf; specifically, the image acquisition device can be arranged above the adjustable shelf and located inside the refrigeration chamber, such as the top end inside the refrigeration chamber, or the image acquisition device can be arranged above the adjustable shelf and located outside the refrigeration chamber, such as the top end of the door body, and the visual angle range of the image acquisition unit can cover the entire adjustable shelf area, so as to ensure that the image containing all the fruits and vegetables placed on the adjustable shelf is acquired.

[0157] Specifically, the collected fruit and vegetable images are recognized to obtain the types and freshness of the fruits and vegetables. When there is a fruit or vegetable with fresh freshness on the adjustable shelf, it means that the fruit or vegetable can perform photosynthesis and promote the synthesis of organic matter, thereby prolonging the preservation period. At this time, the light source module is controlled to emit light sources so that the fresh fruits and vegetables receiving the light sources can perform photosynthesis and prolong the preservation period. Meanwhile, in order to ensure the best light uniformity, the best distance range corresponding to the fresh fruits and vegetables with fresh freshness is obtained. For example, when there are multiple fresh fruits and vegetables, the best distance range corresponding to each fresh fruit and vegetable is obtained. Within the corresponding best distance range, the fresh fruits and vegetables of this type can receive the best light uniformity. At this time, the minimum values of all the best distance ranges are compared to obtain the minimum value among the minimum values of all the best distance ranges, and the minimum value obtained after comparison is taken as the minimum distance. The maximum values of all the best distance ranges are compared to obtain the maximum value among the maximum values of all the best distance ranges, and the maximum value obtained after comparison is taken as the maximum distance. For example, fresh fruit A, fresh fruit B, and fresh fruit C are placed on the adjustable shelf. The best distance range corresponding to fresh fruit A is H1-H2, the best distance range corresponding to fresh fruit B is H3-H4, and the best distance range corresponding to fresh fruit C is H5-H6. H1, H3, and H5 are compared to obtain the minimum value among them, which is taken as the minimum distance. H2, H4, and H6 are compared to obtain the maximum value among them, which is taken as the maximum distance. Finally, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance. Between the minimum distance and the maximum distance, the fruits and vegetables can receive the best light uniformity, ensure the photosynthesis effect, and achieve the best preservation effect.

[0158] Optionally, after obtaining the best distance range corresponding to the fresh fruits and vegetables according to the correspondence between the preset fruit and vegetable types and the best distance ranges, the fruit and vegetable preservation control method of the refrigerator further includes:

[0159] When there is a distance interval in which all the best distance ranges coincide with each other, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval.

[0160] When there is no distance interval in which all the best distance ranges coincide with each other, the weights of the fresh fruits and vegetables are obtained.

[0161] According to all the weights, the type of the heaviest fruit or vegetable is determined.

[0162] When there is only one type of the heaviest fruits and vegetables, the adjustable shelf is controlled to move up and down so that the distance between the adjustable shelf and the light source module after the movement is within the optimal distance range corresponding to the heaviest fruits and vegetables;

[0163] When the heaviest fruits and vegetables include at least two types, calculating the average of the optimal distance ranges corresponding to each type of the heaviest fruits and vegetables;

[0164] Compare all the average values ​​to obtain the minimum and maximum average values;

[0165] The adjustable shelf is controlled to move up and down so that the distance between the adjustable shelf and the light source module after the movement is between the minimum average value and the maximum average value.

[0166] It is understandable that in order to further improve the preservation effect, a more accurate distance between the adjustable shelf and the light source module is obtained. Specifically, based on the overlapping part of the optimal distance range and the weight of fresh fruits and vegetables, the distance between the adjustable shelf and the light source module is further reduced to improve the preservation effect. More specifically, it is determined whether there is a distance interval in which all the optimal distance ranges overlap with each other. For example, fresh fruits and vegetables A, fresh fruits and vegetables B, and fresh fruits and vegetables C are placed on the adjustable shelf. The optimal distance range corresponding to fresh fruits and vegetables A is H1~H2, the optimal distance range corresponding to fresh fruits and vegetables B is H3~H4, and the optimal distance range corresponding to fresh fruits and vegetables C is H5~H6. When H1~H2, H3~H4, and H5~H6 all overlap with each other, the distance interval in which H1~H2, H3~H4, and H5~H6 all overlap with each other is obtained, and the adjustable shelf is controlled to move up and down so that the distance between the adjustable shelf and the light source module after movement is 1~H2. within the distance interval; when H1-H2, H3-H4 and H5-H6 do not have overlapping parts, for example, H1-H2 and H3-H4 have overlapping parts, and H3-H4 and H5-H6 do not have overlapping parts, obtain the weights of fresh fruits and vegetables A, B and C; if it is determined that fresh fruit and vegetable A is the heaviest, control the adjustable shelf to move up and down so that the distance between the adjustable shelf and the light source module after movement is between the optimal distance range H1-H2 corresponding to fresh fruit and vegetable A; if it is determined that the weights of fresh fruits and vegetables A and fresh fruits and vegetables B are equal and both are the heaviest, calculate the average value of the optimal distance range corresponding to each heaviest fruit and vegetable. Will Comparison is performed to obtain a minimum average value and a maximum average value, and the adjustable shelf is controlled to move up and down so that the distance between the adjustable shelf and the light source module after movement is between the minimum average value and the maximum average value.

[0167] Optionally, the corresponding relationship between the fruit and vegetable types and the optimal distance range is established through the following steps:

[0168] controlling the light source module to emit light source;

[0169] For each type of fresh fruit and vegetable, the following operations are performed:

[0170] acquiring a preservation period of the fresh fruit and vegetable at different distances between the fresh fruit and vegetable and the light source module under the light source;

[0171] acquiring all distances corresponding to the preservation period greater than the preset period threshold, and using a minimum value and a maximum value in the all distances to form an optimal distance range corresponding to the fresh fruit and vegetable.

[0172] It can be understood that in the embodiment of the present application, the same type of fresh fruit and vegetable is placed on the adjustable shelf, the light source module is controlled to emit light source, at this time, the adjustable shelf is controlled to move up and down, the preservation period of the fresh fruit and vegetable at different distances is acquired, when the preservation period is greater than the preset period threshold, the distance corresponding to the preservation period is recorded, and the minimum value and the maximum value in the recorded distance are used as the optimal distance range corresponding to the fresh fruit and vegetable. The above operation is repeated for each type of fresh fruit and vegetable in turn, and a corresponding relationship between the fruit and vegetable type and the optimal distance range is established.

[0173] Optionally, the light source module comprises a plurality of same light source areas; and the adjustable shelf is provided with a placing area corresponding to each light source area;

[0174] Therefore, the fruit and vegetable preservation control method of the refrigerator further comprises:

[0175] acquiring freshness of the fruit and vegetable in the placing area;

[0176] controlling the light source area corresponding to the placing area to emit light source when the fresh fruit and vegetable exists in the placing area;

[0177] controlling the light source area corresponding to the placing area not to emit light source when the fresh fruit and vegetable does not exist in the placing area.

[0178] As shown in the example, Figure 8 the light source module is divided into four same light source areas, including areas ①-④, each light source area is uniformly distributed with four red and blue alternating LED lamps, each light source area is a sub-light source module, and the controller can control each sub-light source module individually. The adjustable shelf is also divided into four areas according to the light source areas; when the fresh fruit and vegetable exists in a placing area, the sub-light source module corresponding to the placing area is controlled to emit light source; when the fresh fruit and vegetable does not exist in a placing area, the sub-light source module corresponding to the placing area is controlled not to emit light source, realizing on-demand opening of the light source and achieving the purpose of energy saving.

[0179] Optionally, the light source module is uniformly arranged with a plurality of red LED lamps and a plurality of blue LED lamps; wherein the red LED lamps and the blue LED lamps are arranged alternately.

[0180] It should be noted that the distribution of light sources also affects the uniformity of illumination, and the uniformity of illumination affects the photosynthesis efficiency, and then affects the preservation effect. Therefore, in the embodiment of the present application, the LED lamps are uniformly arranged on the light source module, and the red LED lamps and the blue LED lamps are arranged alternately, so that the fruit and vegetable receives the best uniformity of illumination, and the preservation effect is better. For example, see Figure 9 The arrangement of LED lamps in each light source area is the same, and the left and right interval and the upper and lower interval of any two adjacent LED lamps are the same, both being L.

[0181] Optionally, after the image is identified to obtain the type and freshness of the fruit and vegetable placed on the adjustable shelf, the fruit and vegetable preservation control method of the refrigerator further comprises:

[0182] When there is no fresh fruit and vegetable on the adjustable shelf, the light source module is controlled not to emit light source.

[0183] It should be noted that when the fruit and vegetable is judged to be not fresh, the fruit and vegetable state is not good at this time, and illumination cannot increase the preservation effect, and illumination may also increase transpiration and accelerate the water loss of fruit and vegetable, which is not conducive to preservation. Therefore, when there is no fresh fruit and vegetable on the adjustable shelf, the light source module is controlled not to emit light source, so as to avoid accelerating the wilting of fruit and vegetable, and reduce energy consumption.

[0184] The fruit and vegetable preservation method of the refrigerator provided in the embodiment of the present application controls the light source module to emit light source when there is fresh fruit and vegetable on the adjustable shelf; according to the correspondence between the preset fruit and vegetable type and the best distance range, the best distance range corresponding to the fresh fruit and vegetable is obtained; the adjustable shelf is controlled to move up and down, so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance; wherein the minimum distance is the minimum value of all the minimum values of the best distance range, and the maximum distance is the maximum value of all the maximum values of the best distance range. As can be seen, the adjustable shelf is moved to a suitable position in the embodiment of the present application, so that the uniformity of illumination received by the fruit and vegetable and the uniformity of illumination reach the best, thereby improving the photosynthesis efficiency of the fruit and vegetable, and finally improving the preservation effect of the fruit and vegetable.

[0185] The above is the preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the present application, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A refrigerator characterized by comprising: The application relates to a refrigerator comprising: a cabinet comprising a refrigeration chamber; an adjustable shelf arranged in the refrigeration chamber; a light source module arranged in the refrigeration chamber and opposite to the adjustable shelf, the light source module emitting light source towards the adjustable shelf; an image acquisition device for acquiring images of fruits and vegetables placed on the adjustable shelf; a controller for: acquiring the images of the fruits and vegetables placed on the adjustable shelf acquired by the image acquisition device; identifying the images to obtain the types and freshness of the fruits and vegetables placed on the adjustable shelf; controlling the light source module to emit light source when there are fresh fruits and vegetables on the adjustable shelf; obtaining the optimal distance range corresponding to the fresh fruits and vegetables according to a preset correspondence between fruit and vegetable types and optimal distance ranges; controlling the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance; wherein the minimum distance is obtained by comparing the minimum values of all the optimal distance ranges and taking the minimum value as the minimum distance; and the maximum distance is obtained by comparing the maximum values of all the optimal distance ranges and taking the maximum value as the maximum distance.

2. The refrigerator according to claim 1, wherein, After the controller obtains the optimal distance range corresponding to the fresh fruits and vegetables according to the preset correspondence between fruit and vegetable types and optimal distance ranges, the controller is further configured to: when there is a distance interval in which all the optimal distance ranges overlap, control the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval; when there is no distance interval in which all the optimal distance ranges overlap, obtain the weights of the fresh fruits and vegetables; determine the type of the heaviest fruits and vegetables according to all the weights; when the type of the heaviest fruits and vegetables is only one, control the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is within the optimal distance range corresponding to the heaviest fruits and vegetables; when the type of the heaviest fruits and vegetables includes at least two types, calculate the average value of the optimal distance range corresponding to each type of the heaviest fruits and vegetables; compare all the average values to obtain the minimum average value and the maximum average value; control the adjustable shelf to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

3. The refrigerator according to claim 1, wherein The correspondence between fruit and vegetable types and optimal distance ranges is constructed by: controlling the light source module to emit light source; for each type of fresh fruits and vegetables, performing the following operations: obtaining the preservation periods of the fresh fruits and vegetables under different distances between the adjustable shelf and the light source module under the light source; obtaining all the distances corresponding to the preservation periods greater than a preset period threshold, and using the minimum value and the maximum value in the all distances to form the optimal distance range corresponding to the fresh fruits and vegetables.

4. The refrigerator according to claim 1, wherein The light source module comprises a plurality of identical light source regions; and the adjustable shelf is provided with a placing region corresponding to each light source region. The controller is further configured to: obtain the freshness of the fruits and vegetables in the placing region. When there is fresh fruit and vegetable in the placing area, the light source area corresponding to the placing area is controlled to emit light source; When there is no fresh fruit and vegetable in the placing area, the light source area corresponding to the placing area is controlled not to emit light source.

5. The refrigerator according to claim 1, wherein The light source module is uniformly arranged with a plurality of red LED lamps and a plurality of blue LED lamps; wherein, the red LED lamps and the blue LED lamps are arranged alternately.

6. The refrigerator according to claim 1, wherein After the image is identified to obtain the type and freshness of the fruit and vegetable placed on the adjustable shelf, the controller is further configured to: When there is no fresh fruit and vegetable on the adjustable shelf, the light source module is controlled not to emit light source. 7.A method of controlling preservation of fruits and vegetables in a refrigerator, characterized by, The refrigerator at least comprises: an adjustable shelf arranged in a refrigerating chamber and a light source module arranged in the refrigerating chamber and opposite to the adjustable shelf, the light source emitted by the light source module is towards the adjustable shelf, and a fruit and vegetable preservation control method of the refrigerator comprises: acquiring an image of the fruit and vegetable placed on the adjustable shelf; identifying the image to obtain the type and freshness of the fruit and vegetable placed on the adjustable shelf; When there is fresh fruit and vegetable on the adjustable shelf, the light source module is controlled to emit light source; According to the preset correspondence between the type of fruit and vegetable and the optimal distance range, the optimal distance range corresponding to the fresh fruit and vegetable is obtained; The adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum distance and the maximum distance; Wherein, the minimum distance is obtained by comparing the minimum values of all the optimal distance ranges and taking the minimum value as the minimum distance; the maximum distance is obtained by comparing the maximum values of all the optimal distance ranges and taking the maximum value as the maximum distance.

8. The method for controlling the freshness of fruits and vegetables in a refrigerator according to claim 7, wherein: After the optimal distance range corresponding to the fresh fruit and vegetable is obtained according to the preset correspondence between the type of fruit and vegetable and the optimal distance range, the fruit and vegetable preservation control method of the refrigerator further comprises: When there is a distance interval in which all the optimal distance ranges coincide with each other, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the distance interval; When there is no distance interval in which all the optimal distance ranges coincide with each other, the weight of the fresh fruit and vegetable is obtained; According to all the weights, the type of the heaviest fruit and vegetable is confirmed; When the type of the heaviest fruit and vegetable is only one, the adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is within the optimal distance range corresponding to the heaviest fruit and vegetable; When the type of the heaviest fruit and vegetable includes at least two, the average value of the optimal distance range corresponding to each type of the heaviest fruit and vegetable is calculated; All the average values are compared to obtain the minimum average value and the maximum average value; The adjustable shelf is controlled to move up and down so that the distance between the moved adjustable shelf and the light source module is between the minimum average value and the maximum average value.

9. The method for controlling the freshness of fruits and vegetables in a refrigerator according to claim 7, wherein: The correspondence between the type of fruit and vegetable and the optimal distance range is constructed by the following steps: The light source module is controlled to emit light source; For each type of fresh fruit and vegetable, the following operations are performed: acquire the fresh-keeping period of fresh fruit and vegetable at different distances between the adjustable shelf and the light source module under the light source; acquire all distances corresponding to the fresh-keeping period greater than the preset period threshold, and use the minimum and maximum values in the all distances to form the optimal distance range corresponding to the fresh fruit and vegetable. 10.The method of claim 7, wherein, if the fruit or vegetable is stored in the refrigerator for a predetermined period of time, the method further comprises: The light source module includes a plurality of identical light source regions; the adjustable shelf is provided with a placement region corresponding to each light source region; ​ Then, the fruit and vegetable fresh-keeping control method of the refrigerator further includes: acquire the freshness of the fruit and vegetable in the placement region; when there is fresh fruit and vegetable in the placement region, control the light source region corresponding to the placement region to emit light source; when there is no fresh fruit and vegetable in the placement region, control the light source region corresponding to the placement region not to emit light source.

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