Refrigerator and fruit and vegetable fresh-keeping method

Abstract

According to the refrigerator and the fruit and vegetable fresh-keeping method, a light fresh-keeping module capable of adjusting different light sources and frequencies and an automatic lifting shelf are carried in the refrigerator, the variety and the weight of fruits and vegetables placed on the automatic lifting shelf can be recognized in combination with a food material recognition system, and the situation that the fruits and the vegetables are stored in a mixed mode can be recognized. The most suitable preservation mode can be determined according to the fruit weight, the first influence parameter, the vegetable weight and the second influence parameter; wherein the fresh-keeping mode comprises a fruit fresh-keeping mode and a vegetable fresh-keeping mode, the light source and the irradiation frequency of the light fresh-keeping module are intelligently adjusted according to the determined fresh-keeping mode, the distance between the automatic lifting shelf and the light fresh-keeping module is adjusted, and the best fresh-keeping effect on fruits and vegetables is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerators, and in particular to a refrigerator and a method for preserving fruits and vegetables. Background Art

[0002] Fruits and vegetables are indispensable foods in people's daily diet, providing people with rich nutrients. With the accelerated pace of life, young people tend to buy a large amount of fruits and vegetables at one time and store them in the refrigerator, so the preservation of fruits and vegetables in the refrigerator is particularly important. Vacuum fresh-keeping drawers are often used in the prior art to preserve fruits and vegetables, but due to the complex structure of the vacuum fresh-keeping drawer, an additional exhaust device is required, which will also bring additional noise and power consumption. In addition, although there are refrigerators using photosynthetic fresh-keeping lamps in the prior art, the sensitive bands of each vegetable are not the same, and it is not possible to implement different bands of light for different fruits and vegetables, resulting in poor preservation of fruits and vegetables. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a fruit and vegetable preservation method, which can intelligently adjust the irradiation frequency of the light preservation module and the distance between the fruit and vegetable shelves and the light preservation module by judging the type and weight of the fruits and vegetables, so as to achieve the best preservation effect for the fruits and vegetables.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] a box body, in which a storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber;

[0006] A door, used for opening and closing the storage room;

[0007] A light preservation module is provided on the top of the refrigerating chamber and is used to emit a corresponding light source according to a light pattern sent by a controller;

[0008] An automatic lifting shelf is arranged in the refrigerating chamber and is used to adjust the distance between the shelf and the light preservation module according to the movement instruction sent by the controller;

[0009] The controller is configured as:

[0010] When it is detected that a target food is placed on the current automatic lifting shelf, the type of the target food is obtained; wherein the type of the target food includes at least one of fruits and vegetables;

[0011] When the types of the target ingredients include fruits and vegetables, obtaining the corresponding weights of the fruits and vegetables according to the pre-stored label information of the target ingredients;

[0012] Acquire a first influencing parameter corresponding to the fruit and a second influencing parameter corresponding to the vegetable;

[0013] Determine a preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter; wherein the preservation mode includes a fruit preservation mode and a vegetable preservation mode;

[0014] The operation of the optical fresh-keeping module is controlled according to the fresh-keeping mode, the moving distance of the automatic lifting shelf is determined according to the fresh-keeping mode, and the automatic lifting shelf is controlled to move according to the moving distance.

[0015] As an improvement of the above solution, the method of determining the preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter includes:

[0016] Calculate a fruit preservation score according to the fruit weight, the vegetable weight, the first influencing parameter, and a first preservation ratio corresponding to the fruit;

[0017] Calculating a vegetable freshness-keeping score according to the fruit weight, the vegetable weight, the second influencing parameter, and a second freshness-keeping ratio corresponding to the vegetable;

[0018] When the fruit freshness score is greater than the vegetable freshness score, the refrigerator is controlled to operate in the fruit freshness mode; when the fruit freshness score is less than the vegetable freshness score, the refrigerator is controlled to operate in the vegetable freshness mode; when the fruit freshness score is equal to the vegetable freshness score, the refrigerator is controlled to remain in the current freshness mode.

[0019] As an improvement of the above solution, the controller is further configured as follows:

[0020] When the types of the target food only include fruits, controlling the refrigerator to operate in the fruit preservation mode;

[0021] When the types of the target ingredients include only vegetables, the refrigerator is controlled to operate in the vegetable preservation mode.

[0022] As an improvement of the above scheme, the first influencing parameter includes a first nutrient average retention rate and a first average weight loss rate, and the second influencing parameter includes a second nutrient average retention rate and a second average weight loss rate; wherein, the first nutrient average retention rate is greater than the second nutrient average retention rate, and the first average weight loss rate is greater than the second average weight loss rate.

[0023] As an improvement of the above-mentioned scheme, the adjustable parameters in the fruit preservation mode include a first light source, a first light emission duration, a first light illumination frequency and a first light illumination distance, and the adjustable parameters in the vegetable preservation mode include a second light source, a second light emission duration, a second light illumination frequency and a second light illumination distance.

[0024] As an improvement of the above solution, the step of determining the moving distance of the automatic lifting shelf according to the fresh-keeping mode includes:

[0025] After determining the fresh-keeping mode, obtaining the illumination distance in the fresh-keeping mode, and obtaining the distance between the food in the automatic lifting shelf and the light fresh-keeping module;

[0026] The moving distance is calculated according to the illumination distance and the distance between them.

[0027] As an improvement of the above solution, the refrigerator further includes:

[0028] A camera device is arranged in the refrigerating chamber and is used to take pictures of the food placed on the automatic lifting shelf;

[0029] Then, the controller is further configured to:

[0030] Obtaining the moving direction of the automatic lifting shelf;

[0031] When the automatic lifting shelf needs to be moved to the top of the refrigerator, the food placement diagram captured by the camera device is obtained, and the highest height of the food stored on the automatic lifting shelf is identified based on the food placement diagram;

[0032] Calculating an adjustable distance from the maximum height to a preset maximum limit height; wherein the maximum limit height is separated from the top of the refrigerator by a distance;

[0033] When the adjustable distance is greater than the moving distance, the automatic lifting shelf is controlled to move according to the moving distance;

[0034] When the adjustable distance is less than or equal to the moving distance, the automatic lifting shelf is controlled to move according to the adjustable distance.

[0035] As an improvement of the above solution, the controller is further configured as follows:

[0036] When the automatic lifting shelf needs to move toward the bottom of the refrigerator, the automatic lifting shelf is controlled to move according to the moving distance, and stops moving when the moving distance is completed or a preset minimum limit height is reached.

[0037] To achieve the above-mentioned purpose, an embodiment of the present invention further provides a method for preserving fruits and vegetables, which is applicable to a refrigerator, wherein the refrigerator comprises a light preservation module and an automatic lifting shelf arranged on the top of a refrigerating chamber; the method comprises:

[0038] When it is detected that a target food is placed on the current automatic lifting shelf, the type of the target food is obtained; wherein the type of the target food includes at least one of fruits and vegetables;

[0039] When the types of the target ingredients include fruits and vegetables, obtaining the corresponding weights of the fruits and vegetables according to the pre-stored label information of the target ingredients;

[0040] Acquire a first influencing parameter corresponding to the fruit and a second influencing parameter corresponding to the vegetable;

[0041] Determine a preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter; wherein the preservation mode includes a fruit preservation mode and a vegetable preservation mode;

[0042] The operation of the optical fresh-keeping module is controlled according to the fresh-keeping mode, the moving distance of the automatic lifting shelf is determined according to the fresh-keeping mode, and the automatic lifting shelf is controlled to move according to the moving distance.

[0043] As an improvement of the above solution, the method further includes:

[0044] When the types of the target food only include fruits, controlling the refrigerator to operate in the fruit preservation mode;

[0045] When the types of the target ingredients include only vegetables, the refrigerator is controlled to operate in the vegetable preservation mode.

[0046] Compared with the related art, the present invention discloses a refrigerator and a method for preserving fruits and vegetables. The refrigerator is equipped with an optical preservation module and an automatic lifting shelf that can adjust different light sources and frequencies. Combined with a food identification system, the refrigerator can identify the types and weights of fruits and vegetables placed on the automatic lifting shelf. For the mixed storage of fruits and vegetables, the most suitable preservation mode can be determined according to the weight of the fruit, the first influencing parameter, the weight of the vegetable and the second influencing parameter; wherein the preservation modes include a fruit preservation mode and a vegetable preservation mode, and the light source and irradiation frequency of the optical preservation module are intelligently adjusted according to the determined preservation mode, as well as the distance between the automatic lifting shelf and the optical preservation module, so as to achieve the best preservation effect for fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0049] Figure 3 A schematic diagram of the structure of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0050] Figure 4 A schematic structural diagram of a light fresh-keeping module in a refrigerator provided by an embodiment of the present invention;

[0051] Figure 5 is a schematic diagram of the structure of an automatic lifting shelf in a refrigerator provided by an embodiment of the present invention;

[0052] Figure 6 is a first working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0053] Figure 7 is a second working flow chart of the controller in the refrigerator provided by an embodiment of the present invention;

[0054] Figure 8 is a third working flow diagram of the controller in the refrigerator provided by an embodiment of the present invention;

[0055] Fig. 9 is a fourth working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0056] Fig.10 The present invention is a flowchart of a method for preserving fruits and vegetables provided by an embodiment of the present invention.

[0057] Among them, 100, refrigerator; 101, light preservation module; 102, automatic lifting shelf; 103, lifting device; 1, compressor; 2, evaporator; 3, capillary; 4, condenser. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] See also Figure 1 , Figure 1 It is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately in the shape of a rectangular parallelepiped. The refrigerator includes a box body that defines a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body outer shell located on the outside of the box body, a door body liner located on the inside of the box body, an upper end cover, a lower end cover, and an insulating layer located between the door body outer shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulating layer is filled with foam material. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a compressor cabin, etc., and also includes a storage space for storing food, etc. See Figure 2 , Figure 2 : is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as refrigerators and freezers according to different uses. They can also include variable temperature rooms, vacuum drawers, moisturizing drawers, etc. Each storage room corresponds to one or more door bodies, for example, Figure 1 The upper storage room is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to achieve drawer-like storage. The refrigerator door is provided with a display screen, which is used to display prompt information and receive user touch operations.

[0063] See also Figure 3 , Figure 3The schematic diagram of the structure of the refrigeration system in the refrigerator provided by the embodiment of the present invention, the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. The compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged to the condenser 4; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 4, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; The flow process is as follows: the saturated liquid refrigerant after condensation is filtered out of moisture and impurities by a drying filter and then flows into the capillary tube 3 through which the refrigerant is throttled and depressurized to become wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature and low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and then returns to the compressor 1, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0064] See also Figure 4 , Figure 4 The structural diagram of the light preservation module 101 in the refrigerator provided by the embodiment of the present invention is that the light preservation module 101 is arranged on the top of the refrigerating chamber and is used to emit a corresponding light source according to the light mode sent by the controller. The present invention selects red, blue and orange three colors of light and their different combinations to alternately illuminate fruits and vegetables, such as Figure 4 The three lamp beads shown can emit red, blue and orange light respectively. The three lamp beads can emit light individually or in combination. The light emission conditions include: red, blue, orange, red + blue, red + orange, blue + orange, red + blue + orange, a total of 7 light emission conditions. The alternating illumination of different colors at different frequencies has different preservation effects on fruits and vegetables. At the same time, due to the different illumination frequencies, the light intensity irradiated on the same plane is different. The light intensity will affect the photosynthesis rate of the plant, and the most suitable distances for illumination of different frequencies are also different. Therefore, in the embodiment of the present invention, the light preservation effect of fruits and vegetables can be improved by selecting the light source, light emission duration, illumination frequency and illumination distance suitable for the light preservation module 101 during the preservation process.

[0065] It is worth noting that the light source of the light preservation module 101 can emit light of other colors in addition to the above-mentioned red, blue and orange lights, and the user can adjust it as needed. For example, the database of the refrigerator pre-stores the best light sources corresponding to several kinds of fruits / vegetables. If necessary, the user can enter the light source query instruction of the food to be stored in the display of the refrigerator (if no input operation is performed, the default light source is used), and then the controller adjusts the light source of the light preservation module 101 according to the type of food input by the user.

[0066] See also Figure 5 , Figure 5 It is a structural schematic diagram of an automatic lifting shelf 102 in a refrigerator provided in an embodiment of the present invention. The automatic lifting shelf 102 is arranged in the refrigerating chamber, and is used to adjust its distance from the light preservation module according to the movement instruction sent by the controller. The automatic lifting shelf 102 is connected to a lifting device 103. The automatic lifting shelf 102 is a flat plate structure and is arranged horizontally in the refrigerating chamber. There are two lifting devices 103, which are arranged on both sides of the automatic lifting shelf 102. The movement of the lifting device 103 enables the automatic lifting shelf 102 to slide up and down. It can be understood that there is only one automatic lifting shelf 102 in the present invention, and it is arranged near the top of the refrigerator. This is because the refrigerator does not store too many vegetables / fruits at ordinary times, so it is sufficient to set one automatic lifting shelf 102.

[0067] Specifically, the controller in the refrigerator is configured to: when it is detected that the target food is placed on the current automatic lifting shelf, obtain the type of the target food; wherein the type of the target food includes at least one of fruits and vegetables; when the type of the target food includes fruits and vegetables, obtain the corresponding fruit weight and vegetable weight according to the pre-stored label information of the target food; obtain the first influencing parameter corresponding to the fruit and the second influencing parameter corresponding to the vegetable; determine the preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter; wherein the preservation mode includes a fruit preservation mode and a vegetable preservation mode; control the operation of the optical preservation module according to the preservation mode, determine the moving distance of the automatic lifting shelf according to the preservation mode, and control the automatic lifting shelf to move according to the moving distance.

[0068] For example, see Figure 6 , Figure 6It is a first working flow chart of a controller in a refrigerator provided in an embodiment of the present invention, and the controller is configured to execute steps S11 to S16. The refrigerator also includes a camera device, which is arranged in the cold storage room and is used to shoot the food placement diagram on the automatic lifting shelf. The controller obtains the type of target food placed on the automatic lifting shelf by identifying the food placement diagram, wherein the target food refers to fruits and vegetables. The camera device takes pictures at a fixed time and sends them to the controller for identification, such as taking pictures once every 2 hours. There are three types of food storage conditions on the automatic lifting shelf: the first type is that the types of target food include fruits and vegetables, the second type is that the types of target food only include fruits, and the third type is that the types of target food only include vegetables. Since most users now usually mix fruits and vegetables in the cold storage room when using the refrigerator, the probability of the first situation mentioned above is relatively high. When fruits and vegetables are mixed, the fruit weight of the fruit and the vegetable weight of the vegetable are obtained at this time. The weight can be obtained through the label information bound to the fruit or vegetable. If the label is an RFID label, the corresponding weight is pre-written on each RFID label when the food is stored, and the weight value can be obtained when the subsequent controller performs image recognition. The present invention also sets corresponding influencing parameters for the storage conditions of fruits and vegetables. At this time, the first influencing parameter corresponding to the fruit and the second influencing parameter corresponding to the vegetable are obtained, and then the preservation mode is determined according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter. Finally, the operation of the optical preservation module is controlled according to the preservation mode, and the moving distance of the automatic lifting shelf is determined according to the preservation mode, and the automatic lifting shelf is controlled to move according to the moving distance.

[0069] Specifically, the present invention pre-sets two preservation modes for the refrigerator, one is a fruit preservation mode that is more suitable for the fruit storage environment, and the other is a vegetable preservation mode that is more suitable for vegetables, wherein the adjustable parameters in the fruit preservation mode include a first light source, a first light duration, a first illumination frequency and a first illumination distance, and the adjustable parameters in the vegetable preservation mode include a second light source, a second light duration, a second illumination frequency and a second illumination distance, and the adjustable parameters in these two preservation modes obtain optimal values ​​through pre-testing.

[0070] For example, the present invention has verified through experiments that when the light frequency of the light preservation module is A frequency and the light distance from the food is H1, it has a better preservation effect on fruits; when the light frequency is B frequency and the light distance from the food is H2, it has a better preservation effect on vegetables. The specific adjustable parameter settings are shown in Table 1 below.

[0071] Table 1 Adjustable parameters of two light preservation modes

[0072]

[0073] Exemplarily, in Table 1, the first light sources are blue, orange, red, blue + orange, and the first light durations corresponding to different first light sources are X1, X2, X3, and X4, respectively, the first illumination frequency is A Hz, and the first illumination distance is H1; the second light sources are blue + red, orange + red, blue + red + orange, and the second light durations corresponding to different second light sources are X5, X6, and X7, respectively, the second illumination frequency is B Hz, and the second illumination distance is H2. It is worth noting that when the light preservation mode is a fruit preservation module, the first light sources emit light in turn in the first illumination duration corresponding to them in sequence, and continue to emit light in the above sequence after one cycle of polling; when the light preservation mode is a vegetable preservation module, the second light sources emit light in turn in the second illumination duration corresponding to them in sequence, and continue to emit light in the above sequence after one cycle of polling.

[0074] Specifically, determining the fresh-keeping mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter includes: calculating a fruit fresh-keeping score according to the fruit weight, the vegetable weight, the first influencing parameter and a first fresh-keeping ratio corresponding to the fruit; calculating a vegetable fresh-keeping score according to the fruit weight, the vegetable weight, the second influencing parameter and a second fresh-keeping ratio corresponding to the vegetable; when the fruit fresh-keeping score is greater than the vegetable fresh-keeping score, controlling the refrigerator to operate in the fruit fresh-keeping mode; when the fruit fresh-keeping score is less than the vegetable fresh-keeping score, controlling the refrigerator to operate in the vegetable fresh-keeping mode; when the fruit fresh-keeping score is equal to the vegetable fresh-keeping score, controlling the refrigerator to remain in the current fresh-keeping mode unchanged.

[0075] For example, see Figure 7 , Figure 7 It is the second working flow chart of the controller in the refrigerator provided by the embodiment of the present invention, and the step S15 specifically includes steps S151 to S159. The first influencing parameter includes the first nutrient average retention rate T1 and the first average weight loss rate W1, and the second influencing parameter includes the second nutrient average retention rate T2 and the second average weight loss rate W2; wherein, the first nutrient average retention rate T1 is greater than the second nutrient average retention rate T2, and the first average weight loss rate W1 is greater than the second average weight loss rate W2, that is, it satisfies: T1>T2, W1>W2.

[0076] Exemplarily, light can increase the nutrients of fruits and vegetables, but at the same time, due to the promotion of the opening of stomata and the thermal effect brought by light, it will increase the transpiration of fruits and vegetables to a certain extent and accelerate water loss. In the process of preserving fruits and vegetables, leafy vegetables have a larger surface area, and the weight loss rate is greater than that of fruits in the same period of time, and the vegetables wilt after water loss, which can be intuitively felt by users. Therefore, the preservation of fresh vegetables pays more attention to reducing the weight loss phenomenon. However, the weight loss of fruits under the same conditions is much less than that of vegetables, so the preservation of fruits pays more attention to retaining nutrients. Through the inventor's previous research and the sensory test results of the preservation effect of fruits and vegetables, it was found that under the same storage environment, the weight loss rate of fruits is much lower than that of vegetables when stored in the refrigerator due to the smaller specific surface area of ​​fruits than vegetables, and from the appearance, the vegetables wilt after water loss, which gives people a sensory feeling of not freshness. However, under the same conditions, due to less water loss, it is difficult for the human body to see the freshness of the fruit at this time from the visual senses, so the retention rate of nutrients during storage is a more important evaluation method in the fruit preservation process. The first fresh-keeping ratio includes the ratio of the nutrient retention rate of fruits to the fresh-keeping effect and the ratio of the weight loss rate to the fresh-keeping effect. For fruits, during storage, the ratio of the nutrient retention rate to the fresh-keeping effect is X1 (X1>50%), and the ratio of the weight loss rate to the fresh-keeping effect is (1-X1). The second fresh-keeping ratio includes the ratio of the nutrient retention rate of vegetables to the fresh-keeping effect and the ratio of the weight loss rate to the fresh-keeping effect. For vegetables, the ratio of the weight loss rate to the fresh-keeping effect is X2 (X2>50%), and the ratio of the nutrient retention rate to the fresh-keeping effect is (1-X2). It is worth noting that the values ​​of X1 and X2 can be pre-set based on empirical values ​​and are not specifically limited here.

[0077] For example, when the user puts in fruits and vegetables, the food identification system automatically determines the type and weight of the food. For example, if the weight of the fruit is M1 and the weight of the vegetable is M2, the preservation effect score is calculated to satisfy the following formula:

[0078] Y1=M1*T1*X1+M1*(1-W1)*(1-X1)+M2*T1*(1-X1)+M2*(1-W1)*X1;

[0079] Y2=M1*T2*X2+M1*(1-W2)*(1-X2)+M2*T2*(1-X2)+M2*(1-W2)*X2;

[0080] Compare the size of Y1 and Y2 to determine which preservation mode to use. When Y1>Y2, select the fruit preservation mode, control the light preservation module to light up at a frequency of A Hz, and automatically adjust the lifting shelf to a position with a distance of H1 from the light module; when Y<Y2, select the vegetable preservation mode, control the light preservation module to light up at a frequency of B Hz, and automatically adjust the lifting shelf to a position with a distance of H2 from the light module. The food identification system monitors the changes in the weight of fruits and vegetables in real time (such as the user adding fruits / vegetables, or taking out fruits / vegetables). Every time the weight of fruits or vegetables is identified to change, the size of Y1 and Y2 will be recalculated and compared, and the operation mode of the light preservation module and the position of the automatic lifting shelf will be re-determined. It can be foreseen that after the weight of fruits or vegetables changes, Y1=Y2 may occur, then the operation mode of the light preservation module and the position of the automatic lifting shelf will be kept unchanged. When the refrigerator is in the initial state, the light preservation module can be set to any of the two modes. The following examples are used to illustrate (the following data are only for illustration and are not real and confirmed data). Please refer to Table 2 for the preservation mode used when storing fruits and vegetables of different weights.

[0081] Table 2 Fresh-keeping modes for storing fruits and vegetables of different weights

[0082]

[0083]

[0084] Specifically, the controller is further configured to: when the types of the target ingredients include only fruits, control the refrigerator to operate in the fruit preservation mode; when the types of the target ingredients include only vegetables, control the refrigerator to operate in the vegetable preservation mode.

[0085] For example, see Figure 8 , Figure 8 This is the third workflow diagram of the controller in the refrigerator provided by an embodiment of the present invention, and the controller is further configured to execute steps S121 to S123. When only fruits are stored on the automatic lifting shelf, the refrigerator is controlled to operate in the fruit preservation mode, and the light preservation module is controlled to light up at frequency A and corresponding color and time, and the distance between the automatic lifting shelf and the light preservation module is controlled to be H1. When vegetables are stored on the automatic lifting shelf, the refrigerator is controlled to operate in the vegetable preservation mode, and the light preservation module is controlled to light up at frequency B and corresponding color and time, and the distance between the automatic lifting shelf and the light preservation module is controlled to be H2.

[0086] In an embodiment of the present invention, a light preservation module and an automatic lifting shelf that can adjust different light sources and frequencies are installed in the refrigerator. Combined with the food identification system, the types and weights of fruits and vegetables placed on the automatic lifting shelf can be identified. For the mixed storage of fruits and vegetables, the most suitable preservation mode can be determined according to the weight of the fruit, the first influencing parameter, the weight of the vegetable and the second influencing parameter; wherein the preservation modes include a fruit preservation mode and a vegetable preservation mode, and the light source and irradiation frequency of the light preservation module are intelligently adjusted according to the determined preservation mode, as well as the distance between the automatic lifting shelf and the light preservation module, so as to achieve the best preservation effect for fruits and vegetables.

[0087] Specifically, determining the moving distance of the automatic lifting shelf according to the preservation mode includes: after determining the preservation mode, obtaining the lighting distance in the preservation mode, and obtaining the distance between the food in the automatic lifting shelf and the light preservation module; calculating the moving distance according to the lighting distance and the distance.

[0088] Exemplarily, the distance between the food in the automatic lifting shelf and the light preservation module is calculated as follows: the distance from the highest height of the food in the automatic lifting shelf to the light preservation module is calculated as the distance. If the fruit preservation mode is selected, the distance is 30 cm, and the first illumination distance is 20 cm, then the calculated moving distance is +10 cm, indicating that the automatic lifting shelf needs to move up 10 cm; if the fruit preservation mode is selected, the distance is 10 cm, and the first illumination distance is 20 cm, then the calculated moving distance is -10 cm, indicating that the automatic lifting shelf needs to move down 10 cm.

[0089] Specifically, the controller is further configured to: obtain the moving direction of the automatic lifting shelf; when the automatic lifting shelf needs to move to the top of the refrigerator, obtain the food placement diagram captured by the camera device, and identify the highest height of the food stored on the automatic lifting shelf based on the food placement diagram; calculate the adjustable distance from the highest height to the preset maximum limit height; wherein the maximum limit height is a distance away from the top of the refrigerator; when the adjustable distance is greater than the moving distance, control the automatic lifting shelf to move according to the moving distance; when the adjustable distance is less than or equal to the moving distance, control the automatic lifting shelf to move according to the adjustable distance. When the automatic lifting shelf needs to move to the bottom of the refrigerator, control the automatic lifting shelf to move according to the moving distance until it stops moving when the moving distance is completed or the preset minimum limit height is reached.

[0090] For example, see Fig. 9 , Fig. 9It is the fourth work flow chart of the controller in the refrigerator provided by the embodiment of the present invention, and the controller is also configured to execute steps S21 to S30. Since the automatic lifting shelf is arranged near the top of the refrigerator, and the light preservation module is arranged at the top of the refrigerator, in order to keep a certain lighting distance (such as 5cm) between the light preservation module and the fruits / vegetables, the fruits / vegetables stored on the automatic lifting shelf cannot be too close to the light preservation module, otherwise some fruits / vegetables will not be illuminated, thereby affecting the light preservation effect. In the implementation of the present invention, a maximum limit height (such as the maximum limit height is 5cm away from the top of the refrigerator) and a minimum limit height are set, the maximum limit height is the highest position that the automatic lifting shelf can move upward, and the minimum limit height is the lowest position that the automatic upgrade shelf can move downward. When the automatic lifting shelf needs to move to the top (upward) of the refrigerator, the food placement diagram captured by the camera device is obtained, and the highest height of the food stored on the automatic lifting shelf is identified based on the food placement diagram; the adjustable distance from the highest height to the highest limit height is calculated, if the adjustable distance is 20cm and the moving distance is 10cm, then the adjustable distance is greater than the moving distance, and the automatic lifting shelf is controlled to move according to the moving distance, that is, the automatic lifting shelf is controlled to move up 10cm, and the highest limit height has not been reached at this time; if the adjustable distance is 15cm and the moving distance is 20cm, then the adjustable distance is less than the moving distance, in order to avoid the distance between the fruit / vegetable and the light preservation module being too small, the automatic lifting shelf is controlled to move according to the adjustable distance, that is, the automatic lifting shelf is controlled to move up 15cm. When the automatic lifting shelf needs to move to the bottom (downward) of the refrigerator, the automatic lifting shelf is controlled to move according to the moving distance until the moving distance is completed or the preset minimum limit height is reached and the shelf stops moving.

[0091] It is worth noting that since vegetables and fruits are generally taller, it is necessary to measure the adjustable distance between the highest height of fruits / vegetables and the highest limit height, and move the automatic lifting shelf based on this adjustable distance and the moving distance of the automatic lifting shelf. As for the shelves in the remaining refrigerator compartments, since fruits / vegetables are not stored (or less) and the height of the ingredients stored therein is generally not too high, there is no need to measure the highest height of the stored ingredients on this shelf, and the lowest limit height can be directly used as the judgment basis.

[0092] Compared with the related art, by installing a light preservation module and an automatic lifting shelf that can adjust different light sources and frequencies in the refrigerator, combined with a food identification system, the types and weights of fruits and vegetables placed on the automatic lifting shelf can be identified. For the mixed storage of fruits and vegetables, the most suitable preservation mode can be determined according to the weight of the fruit, the first influencing parameter, the weight of the vegetable and the second influencing parameter; wherein, the preservation mode includes a fruit preservation mode and a vegetable preservation mode, and the light source and irradiation frequency of the light preservation module are intelligently adjusted according to the determined preservation mode, as well as the distance between the automatic lifting shelf and the light preservation module, to achieve the best preservation effect for fruits and vegetables. In addition, in the process of moving the automatic lifting shelf, the irradiation space for the light preservation module and the food storage is reserved to ensure that the light preservation module will not be too close to the light preservation module in the process of moving the automatic lifting shelf, and some fruits / vegetables will not be unable to be irradiated, thereby improving the light preservation effect.

[0093] See also Fig.10 , Fig.10 : is a flow chart of a method for preserving fruits and vegetables provided by an embodiment of the present invention. The method for preserving fruits and vegetables is applicable to a refrigerator and is implemented by a controller in the refrigerator. The refrigerator includes an optical fresh-keeping module and an automatic lifting shelf arranged on the top of the refrigerating chamber. Then, the method includes:

[0094] S1. When it is detected that a target food is placed on the current automatic lifting shelf, the type of the target food is obtained; wherein the type of the target food includes at least one of fruits and vegetables;

[0095] S2. When the types of the target ingredients include fruits and vegetables, obtaining the corresponding weights of the fruits and vegetables according to the pre-stored label information of the target ingredients;

[0096] S3, obtaining a first influencing parameter corresponding to fruits and a second influencing parameter corresponding to vegetables;

[0097] S4, determining a preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter; wherein the preservation mode includes a fruit preservation mode and a vegetable preservation mode;

[0098] S5. Controlling the operation of the optical fresh-keeping module according to the fresh-keeping mode, determining the moving distance of the automatic lifting shelf according to the fresh-keeping mode, and controlling the automatic lifting shelf to move according to the moving distance.

[0099] Specifically, the method further includes: when the types of the target ingredients include only fruits, controlling the refrigerator to operate in the fruit preservation mode; when the types of the target ingredients include only vegetables, controlling the refrigerator to operate in the vegetable preservation mode.

[0100] Specifically, determining the fresh-keeping mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter includes: calculating a fruit fresh-keeping score according to the fruit weight, the vegetable weight, the first influencing parameter and a first fresh-keeping ratio corresponding to the fruit; calculating a vegetable fresh-keeping score according to the fruit weight, the vegetable weight, the second influencing parameter and a second fresh-keeping ratio corresponding to the vegetable; when the fruit fresh-keeping score is greater than the vegetable fresh-keeping score, controlling the refrigerator to operate in the fruit fresh-keeping mode; when the fruit fresh-keeping score is less than the vegetable fresh-keeping score, controlling the refrigerator to operate in the vegetable fresh-keeping mode; when the fruit fresh-keeping score is equal to the vegetable fresh-keeping score, controlling the refrigerator to remain in the current fresh-keeping mode unchanged.

[0101] Specifically, the first influencing parameter includes a first nutrient average retention rate and a first average weight loss rate, and the second influencing parameter includes a second nutrient average retention rate and a second average weight loss rate; wherein, the first nutrient average retention rate is greater than the second nutrient average retention rate, and the first average weight loss rate is greater than the second average weight loss rate.

[0102] Specifically, the adjustable parameters in the fruit preservation mode include a first light source, a first light duration, a first light frequency and a first light distance, and the adjustable parameters in the vegetable preservation mode include a second light source, a second light duration, a second light frequency and a second light distance.

[0103] Specifically, determining the moving distance of the automatic lifting shelf according to the preservation mode includes: after determining the preservation mode, obtaining the lighting distance in the preservation mode, and obtaining the distance between the food in the automatic lifting shelf and the light preservation module; calculating the moving distance according to the lighting distance and the distance.

[0104] Specifically, the refrigerator also includes: a camera device, which is arranged in the refrigerating chamber and is used to photograph the food placement diagram on the automatic lifting shelf; then, the method also includes: obtaining the moving direction of the automatic lifting shelf; when the automatic lifting shelf needs to move to the top of the refrigerator, obtaining the food placement diagram photographed by the camera device, and identifying the maximum height of the food stored on the automatic lifting shelf based on the food placement diagram; calculating the adjustable distance from the maximum height to the preset maximum limit height; wherein the maximum limit height is separated from the top of the refrigerator by a distance; when the adjustable distance is greater than the moving distance, controlling the automatic lifting shelf to move according to the moving distance; when the adjustable distance is less than or equal to the moving distance, controlling the automatic lifting shelf to move according to the adjustable distance.

[0105] Specifically, the method further includes: when the automatic lifting shelf needs to move to the bottom of the refrigerator, controlling the automatic lifting shelf to move according to the moving distance until the moving distance is completed or the preset minimum limit height is reached and the shelf stops moving.

[0106] It is worth noting that the specific working process of the fruit and vegetable preservation method described in the embodiment of the present invention can refer to the working process of the controller in the refrigerator described in the above embodiment, which will not be repeated here.

[0107] Compared with the related art, by installing a light preservation module and an automatic lifting shelf that can adjust different light sources and frequencies in the refrigerator, combined with a food identification system, the types and weights of fruits and vegetables placed on the automatic lifting shelf can be identified. For the mixed storage of fruits and vegetables, the most suitable preservation mode can be determined according to the weight of the fruit, the first influencing parameter, the weight of the vegetable and the second influencing parameter; wherein, the preservation mode includes a fruit preservation mode and a vegetable preservation mode, and the light source and irradiation frequency of the light preservation module are intelligently adjusted according to the determined preservation mode, as well as the distance between the automatic lifting shelf and the light preservation module, to achieve the best preservation effect for fruits and vegetables. In addition, in the process of moving the automatic lifting shelf, the irradiation space for the light preservation module and the food storage is reserved to ensure that the light preservation module will not be too close to the light preservation module in the process of moving the automatic lifting shelf, and some fruits / vegetables will not be unable to be irradiated, thereby improving the light preservation effect.

[0108] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which a storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber; A door, used for opening and closing the storage room; A light preservation module is provided on the top of the refrigerating chamber and is used to emit a corresponding light source according to a light pattern sent by a controller; An automatic lifting shelf is arranged in the refrigerating chamber and is used to adjust the distance between the shelf and the light preservation module according to the movement instruction sent by the controller; The controller is configured as: When it is detected that a target food is placed on the current automatic lifting shelf, the type of the target food is obtained; wherein the type of the target food includes at least one of fruits and vegetables; When the types of the target ingredients include fruits and vegetables, obtaining the corresponding weights of the fruits and vegetables according to the pre-stored label information of the target ingredients; Acquire a first influencing parameter corresponding to the fruit and a second influencing parameter corresponding to the vegetable; Determine a preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter; wherein the preservation mode includes a fruit preservation mode and a vegetable preservation mode; The operation of the optical fresh-keeping module is controlled according to the fresh-keeping mode, the moving distance of the automatic lifting shelf is determined according to the fresh-keeping mode, and the automatic lifting shelf is controlled to move according to the moving distance.

2. The refrigerator according to claim 1, characterized in that: Determining the preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter includes: Calculate a fruit preservation score according to the fruit weight, the vegetable weight, the first influencing parameter, and a first preservation ratio corresponding to the fruit; Calculating a vegetable freshness-keeping score according to the fruit weight, the vegetable weight, the second influencing parameter, and a second freshness-keeping ratio corresponding to the vegetable; When the fruit freshness score is greater than the vegetable freshness score, the refrigerator is controlled to operate in the fruit freshness mode; when the fruit freshness score is less than the vegetable freshness score, the refrigerator is controlled to operate in the vegetable freshness mode; when the fruit freshness score is equal to the vegetable freshness score, the refrigerator is controlled to remain in the current freshness mode.

3. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the types of the target food only include fruits, controlling the refrigerator to operate in the fruit preservation mode; When the types of the target ingredients include only vegetables, the refrigerator is controlled to operate in the vegetable preservation mode.

4. The refrigerator according to claim 2, characterized in that: The first influencing parameter includes a first nutrient average retention rate and a first average weight loss rate, and the second influencing parameter includes a second nutrient average retention rate and a second average weight loss rate; wherein, the first nutrient average retention rate is greater than the second nutrient average retention rate, and the first average weight loss rate is greater than the second average weight loss rate.

5. The refrigerator according to claim 1, characterized in that: The adjustable parameters in the fruit preservation mode include a first light source, a first light duration, a first illumination frequency and a first illumination distance; the adjustable parameters in the vegetable preservation mode include a second light source, a second light duration, a second illumination frequency and a second illumination distance.

6. The refrigerator according to claim 1, characterized in that: The step of determining the moving distance of the automatic lifting shelf according to the fresh-keeping mode includes: After determining the fresh-keeping mode, obtaining the illumination distance in the fresh-keeping mode, and obtaining the distance between the food in the automatic lifting shelf and the light fresh-keeping module; The moving distance is calculated according to the illumination distance and the distance between them.

7. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises: A camera device is arranged in the refrigerating chamber and is used to take pictures of the food placed on the automatic lifting shelf; Then, the controller is further configured to: Obtaining the moving direction of the automatic lifting shelf; When the automatic lifting shelf needs to be moved to the top of the refrigerator, the food placement diagram captured by the camera device is obtained, and the highest height of the food stored on the automatic lifting shelf is identified based on the food placement diagram; Calculating an adjustable distance from the maximum height to a preset maximum limit height; wherein the maximum limit height is separated from the top of the refrigerator by a distance; When the adjustable distance is greater than the moving distance, the automatic lifting shelf is controlled to move according to the moving distance; When the adjustable distance is less than or equal to the moving distance, the automatic lifting shelf is controlled to move according to the adjustable distance.

8. The refrigerator according to claim 1, characterized in that The controller is also configured to: When the automatic lifting shelf needs to move toward the bottom of the refrigerator, the automatic lifting shelf is controlled to move according to the moving distance, and stops moving when the moving distance is completed or a preset minimum limit height is reached.

9. A method for preserving fruits and vegetables, characterized in that: Applicable to a refrigerator, the refrigerator comprising a light preservation module and an automatic lifting shelf arranged on the top of the refrigerating chamber; then, the method comprises: When it is detected that a target food is placed on the current automatic lifting shelf, the type of the target food is obtained; wherein the type of the target food includes at least one of fruits and vegetables; When the types of the target ingredients include fruits and vegetables, obtaining the corresponding weights of the fruits and vegetables according to the pre-stored label information of the target ingredients; Acquire a first influencing parameter corresponding to the fruit and a second influencing parameter corresponding to the vegetable; Determine a preservation mode according to the fruit weight, the first influencing parameter, the vegetable weight and the second influencing parameter; wherein the preservation mode includes a fruit preservation mode and a vegetable preservation mode; The operation of the optical fresh-keeping module is controlled according to the fresh-keeping mode, the moving distance of the automatic lifting shelf is determined according to the fresh-keeping mode, and the automatic lifting shelf is controlled to move according to the moving distance.

10. The method for preserving fruits and vegetables as claimed in claim 9, characterized in that: The method further comprises: When the types of the target food only include fruits, controlling the refrigerator to operate in the fruit preservation mode; When the types of the target ingredients include only vegetables, the refrigerator is controlled to operate in the vegetable preservation mode.

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