A refrigerator

Abstract

The application discloses a refrigerator, which has at least one drawer, a closed storage area for storing fruits and vegetables is formed in the drawer, a heating part is arranged on the drawer and is used for adjusting the temperature in the storage area, a moisture-permeable film is arranged on the drawer and is used for allowing the moisture in the storage area to flow out to the outside unidirectionally when the humidity in the storage area is greater than the humidity outside, so as to adjust the humidity in the storage area, an ethylene removal part is arranged on the drawer and is used for removing the ethylene in the storage area, and a photoelectric detection module is arranged on the drawer and is used for acquiring the color change of the fruits and vegetables in the storage area. The system judges the maturity of the fruits and vegetables according to the color change, so as to control the operation of the heating part and the ethylene removal part, accelerates the maturity of the unripe fruits and vegetables, prolongs the fresh-keeping storage time of the ripe fruits and vegetables, and improves the storage effect of the fruits and vegetables.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a refrigerator. BACKGROUND

[0002] Tropical fruits are generally grown in tropical regions. Since the tropical fruits are picked after ripening, they will over-ripen and rot during transportation. Therefore, the tropical fruits are generally picked when unripe, and are ripened by using chemical methods before being sold to users. With the continuous ripening of the tropical fruits, the flavor substances of the tropical fruits are also continuously increased, and the sweetness is also continuously increased. However, the tropical fruits have an optimal ripeness, and in the over-ripe state, the sensory color of the tropical fruits is decreased, and the tropical fruits are on the decline. Therefore, the tropical fruits only have the best taste and nutritional quality when the tropical fruits are at the optimal ripeness.

[0003] In the sales link, the tropical fruits are generally ripened by the vendors. However, it is difficult to control the ripening degree of the tropical fruits to the optimal ripeness. Therefore, the ripeness of the tropical fruits purchased by consumers is inconsistent, and it is difficult for ordinary consumers to taste the best taste and flavor when the tropical fruits are at the optimal ripeness.

[0004] It is difficult for consumers to control the ripeness of the purchased tropical fruits in the storage environment at home. When the tropical fruits are placed at room temperature, the tropical fruits will quickly over-ripen. The low-temperature environment of the refrigerator will cause cold damage to the tropical fruits. Even if the consumers place the tropical fruits at 10-15℃ which is suitable for the storage of the tropical fruits, it is difficult to control the ripeness of the tropical fruits to the optimal ripeness only by temperature control, and it is also difficult to maximize the time for the tropical fruits to stay at the optimal ripeness.

[0005] The above information disclosed in the background section is only used to increase the understanding of the background of the present application, and therefore, it can include the prior art known by those skilled in the art. SUMMARY

[0006] In view of the problems in the background, the present application provides a refrigerator. The color change of the fruits and vegetables in the storage area is obtained by using a photoelectric detection module. The ripeness of the fruits and vegetables is determined according to the color change, and the operation of the related components is controlled according to the color change, so as to improve the storage effect of the fruits and vegetables.

[0007] To achieve the above-mentioned application purposes, the present application adopts the following technical solutions:

[0008] In some embodiments of the present application, a refrigerator is provided. The refrigerator has at least one drawer, and a closed storage area for storing fruits and vegetables is formed in the drawer.

[0009] The heating part is used to adjust the temperature in the storage area.

[0010] The drawer is provided with a moisture-permeable film, which allows moisture in the storage area to flow outwards unidirectionally when the humidity in the storage area is greater than the humidity outside, so as to adjust the humidity in the storage area.

[0011] The ethylene removal unit is used for removing ethylene in the storage area.

[0012] The photoelectric detection module is used for obtaining the color change of the fruits and vegetables in the storage area, and the system judges the maturity of the fruits and vegetables according to the color change, so as to control the operation of the heating unit and the ethylene removal unit.

[0013] The present application obtains the color change of the fruits and vegetables in the storage area through the photoelectric detection module, judges the maturity of the fruits and vegetables according to the color change, and controls the operation of the related components accordingly, so as to accelerate the ripening of unripe fruits and vegetables and prolong the fresh-keeping storage time of ripe fruits and vegetables, thereby improving the storage effect of fruits and vegetables.

[0014] In some embodiments of the present application, the fruits and vegetables have a suitable storage temperature range and a cold injury critical temperature range.

[0015] When the system analyzes that the fruits and vegetables have not reached the optimal maturity, the refrigerator enters a ripening mode, the heating unit is turned on or off according to the temperature in the storage area to make the temperature in the storage area within the suitable storage temperature range, and the ethylene removal unit is turned off.

[0016] When the system analyzes that the fruits and vegetables have reached the optimal maturity, the refrigerator enters a fresh-keeping mode, the heating unit is turned on or off according to the temperature in the storage area to make the temperature in the storage area within the cold injury critical temperature range, and the ethylene removal unit is turned on.

[0017] In some embodiments of the present application, the heating unit is arranged on the inner wall of the storage space where the drawer is located, and is used for adjusting the temperature of the storage space where the drawer is located. The heating unit comprises a heating wire, a heat reflecting layer, and a heat insulation layer. The heat insulation layer is arranged on the inner wall, the heat reflecting layer is arranged on the heat insulation layer, and the heating wire is arranged on the heat reflecting layer.

[0018] In some embodiments of the present application, the rear wall of the inner tank of the storage space where the drawer is located is provided with an air cavity in communication with the refrigeration air duct of the refrigerator. A refrigeration fan is arranged in the air cavity. The air cavity is provided with an air outlet and an air return on the side facing the storage space.

[0019] The refrigeration fan is turned on when the temperature in the storage area reaches a set upper limit value.

[0020] In some embodiments of the present application, the top wall of the drawer is provided with the moisture-permeable membrane and an internal dehumidification fan, the internal dehumidification fan is arranged close to the moisture-permeable membrane, and the internal dehumidification fan is arranged on the inner side of the top wall of the drawer and is used to discharge air in the storage area outward.

[0021] In some embodiments of the present application, the inner side of the internal dehumidification fan is provided with a magnetic sensitive part, the magnetic sensitive part has an extending part extending outward from the internal dehumidification fan, the extending part extends towards the moisture-permeable membrane, an electromagnetic coil is arranged above the extending part, and the extending part is displaced towards the electromagnetic coil under the magnetic action of the electromagnetic coil.

[0022] In some embodiments of the present application, the electromagnetic coil has multiple working power levels, and the working power of the electromagnetic coil increases with the increase of the humidity in the storage area.

[0023] In some embodiments of the present application, the outer side of the top wall of the drawer is provided with an external dehumidification fan, the external dehumidification fan is arranged close to the moisture-permeable membrane, and the internal dehumidification fan and the external dehumidification fan are used to operate at different rotating speeds to adjust the water vapor pressure difference between the inner and outer sides of the moisture-permeable membrane and to adjust the rate of moisture in the storage area flowing out through the moisture-permeable membrane.

[0024] In some embodiments of the present application, a humidification water box is arranged in the storage area and is used to adjust the humidity in the storage area.

[0025] A cooling part for cooling water in the humidification water box is arranged on the humidification water box, and the cooling part is turned on when the temperature of water in the humidification water box reaches a measured temperature value in the storage area.

[0026] In some embodiments of the present application, the cooling part is a cooling fan arranged in the humidification water box; or,

[0027] A ventilation opening is arranged on the drawer and communicates with the humidification water box, the ventilation opening communicates with a refrigeration air duct of the refrigerator, the ventilation opening is used to deliver cold air to the humidification water box to cool water in the humidification water box, and a damper for closing and opening the ventilation opening is arranged at the ventilation opening.

[0028] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 List of storage conditions for main tropical fruits and vegetables;

[0031] Figure 2 Storage mode of tropical fruits and vegetables in the refrigerator according to the embodiment;

[0032] Figure 3 Structural schematic diagram of the refrigerator according to the embodiment;

[0033] Figure 4 Structural schematic diagram of the drawer according to the embodiment;

[0034] Figure 5 Structural schematic diagram of Figure 4 Structural schematic diagram of the structure observed from Q;

[0035] Figure 6 Structural schematic diagram of the drawer top cover observed from the inside according to the embodiment;

[0036] Figure 7 Structural schematic diagram of the heating part provided on the inner container wall according to the embodiment;

[0037] Figure 8 Structural schematic diagram of the heating part according to the embodiment;

[0038] Figure 9 Control flowchart of the heating part according to the embodiment;

[0039] Figure 10 Structural schematic diagram of the drawer according to another embodiment;

[0040] Figure 11 Temperature control flowchart of the combination of the refrigeration fan and the heating part in the drawer storage area according to the embodiment;

[0041] Figure 12 Humidity control flowchart of the combination of the internal and external dehumidification fans in the drawer storage area according to the embodiment;

[0042] Figure 13 Top view of the drawer according to the embodiment;

[0043] Figure 14 Humidification part opening control flowchart according to the embodiment;

[0044] Figure 15A side view of a drawer top cover according to another embodiment;

[0045] Figure 16 A bottom view of the drawer top cover shown in Figure 15

[0046] Figure 17 A schematic view of relative positions of an internal dehumidification fan, a magnetic sensitive part, and an electromagnetic coil according to an embodiment;

[0047] Figure 18 A bottom view of the structure shown in Figure 17

[0048] Figure 19 A control flowchart of a refrigerator based on fruit and vegetable maturity and color change according to an embodiment;

[0049] Reference signs:

[0050] 10 - cabinet, 11 - control screen;

[0051] 20 - inner container, 21 - air outlet, 22 - air inlet, 23 - storage space;

[0052] 100 - drawer, 110 - drawer body, 120 - top cover, 130 - storage area;

[0053] 200 - heating part, 210 - heating wire, 220 - heat reflecting layer, 230 - heat insulation layer;

[0054] 300 - humidifying part, 310 - air door;

[0055] 400 - moisture permeable membrane;

[0056] 510 - internal dehumidification fan, 520 - external dehumidification fan;

[0057] 600 - ethylene removal part;

[0058] 700 - temperature sensor;

[0059] 810 - magnetic sensitive part, 811 - protruding part, 820 - electromagnetic coil. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0061] ​​In the description of the application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like refer to the orientation or positional relationship shown in the drawings, and are for convenience only in 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 limiting the application.

[0062] The terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified and limited, the meaning of "a plurality" is two or more.

[0063] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0064] In the present application, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical height of the first feature above and oblique to the second feature, or only indicates that the horizontal height of the first feature is higher than the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical height of the first feature below and oblique to the second feature, or only indicates that the horizontal height of the first feature is less than the second feature.

[0065] The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the application. In addition, the present application can repeatedly refer to the same reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0066] [Refrigerator]

[0067] Referring to Figure 3 , the refrigerator of the present embodiment has a shape of a cuboid, and the appearance of the refrigerator is defined by a storage compartment that defines a storage space and a plurality of door bodies provided in the storage compartment. A liner 20 is provided in the cabinet 10, and the liner 20 encloses a plurality of storage spaces 23 for storing articles. The temperature and humidity in each storage space are controllable to store different types of articles.

[0068] One of the focuses of the refrigerator in the present embodiment is to improve the storage effect of tropical fruits and vegetables, including storing unripe tropical fruits and vegetables in a ripening mode to achieve optimal ripeness, and storing ripe tropical fruits and vegetables in a fresh-keeping mode to store the tropical fruits and vegetables in an optimal temperature and humidity environment to prolong the fresh-keeping storage time.

[0069] The optimal storage conditions for common tropical fruits and vegetables are shown in Figure 1 Figure 1 The chilling injury critical temperature, suitable temperature, and cold injury symptoms of common tropical fruits and vegetables are shown in

[0070] According to the chilling injury critical temperature and suitable storage humidity of each fruit and vegetable, the storage mode, storage temperature, and storage humidity of each type of fruit and vegetable are determined.

[0071] For example, the chilling injury critical temperature range of bananas is 11.7-13.3℃, that is, when the storage temperature is lower than this range, bananas are prone to cold injury, resulting in water-stained dark green patches on the peel, brown stripes in the skin, hardening of the central placenta, delayed ripening, etc. The suitable storage humidity of bananas is 90-95%, when the storage humidity is higher than this range, it is easy to cause condensation in the intercellular space and fruit and vegetable surface immersion, etc., which accelerates the decay of fruits and vegetables; when the storage humidity is lower than this range, it is easy to cause water loss and weight loss of bananas, reducing the fresh-keeping quality of fruits.

[0072] According to the chilling injury temperature range and suitable storage humidity range of each tropical fruit and vegetable shown in Figure 1 , the refrigerator determines that the storage of tropical fruits and vegetables is divided into three modes, namely, warm storage mode, warm storage mode, and cold storage mode, as shown in Figure 2 .

[0073] Bananas, mangoes, lemons, tomatoes, sweet potatoes, and olives are suitable for storage in a warm storage mode, with a storage temperature of about 15-12℃ and a storage humidity of 90-95%;

[0074] Zucchini, pumpkin, cucumber, winter melon, melon, cabbage, and citrus are suitable for storage in a warm storage mode, with a storage temperature of about 12-9℃ and a storage humidity of 85-90%; ​

[0075] Sweet pepper, green pepper, bean, eggplant, red hair Dan, papaya is suitable for cold storage mode storage, storage temperature is about 9-6 ℃, the storage humidity is 80-85%.

[0076] The refrigerator in this embodiment also has at least one drawer 100, Figure 3 The middle drawer 100 is in a pulled-out state, the drawer 100 is arranged in the storage space 23, and a closed storage area 130 for storing tropical fruits and vegetables is formed in the drawer 100.

[0077] The drawer 100 provides a special storage area for tropical fruits and vegetables, and the temperature and humidity in the storage area 130 are adjusted to provide the best storage temperature and humidity for the tropical fruits and vegetables, thereby improving the storage effect.

[0078] The temperature adjustment specifically includes temperature increase control and temperature decrease control.

[0079] The humidity adjustment specifically includes humidity increase control and humidity decrease control.

[0080] In some embodiments of the present application, the drawer 100 does not usually store only one kind of tropical fruits and vegetables, but a plurality of kinds of tropical fruits and vegetables are mixed and stored, and the control method of the refrigerator when a plurality of kinds of tropical fruits and vegetables are mixed and stored is as follows:

[0081] When all the tropical fruits and vegetables in the storage area belong to the fruit and vegetable species corresponding to the warm storage mode, or the warm storage mode, or the cold storage mode, the temperature and humidity in the storage area are adjusted to the temperature range and humidity range of the warm storage mode, or the warm storage mode, or the cold storage mode corresponding to the tropical fruits and vegetables.

[0082] When the tropical fruits and vegetables in the storage area belong to the fruit and vegetable species corresponding to two or three of the warm storage mode, the warm storage mode, and the cold storage mode, the temperature and humidity in the storage area are adjusted according to the smaller data of the temperature range and the humidity range.

[0083] For example, when only the fruit and vegetable corresponding to the cold storage mode is stored in the storage area, the storage area temperature is adjusted to one level, the storage temperature is adjusted to 9-6 ℃, and the humidity is adjusted to 80-85%;

[0084] When only the fruit and vegetable corresponding to the warm storage mode is stored in the storage area, or the fruit and vegetable corresponding to the cold storage mode and the fruit and vegetable corresponding to the warm storage mode exist, the storage area temperature is adjusted to two levels, the storage temperature is adjusted to 12-9 ℃, and the humidity is adjusted to 85-90%;

[0085] When only the fruit and vegetable corresponding to the "warm storage mode" is stored in the storage area, or the fruit and vegetable corresponding to the "cold storage mode" and the fruit and vegetable corresponding to the "warm storage mode" exist, or the fruit and vegetable corresponding to the "warm storage mode" and the fruit and vegetable corresponding to the "warm storage mode" exist, or all the three storage modes exist, the temperature of the storage area is adjusted to three levels, the storage temperature is adjusted to 15-12℃, and the humidity is adjusted to 90-95%.

[0086] In some embodiments of the present application, the cabinet 10 is provided with a control screen 11 for displaying and selecting a plurality of temperature control intervals of the storage area, also referred to as a plurality of storage modes, facilitating use and operation.

[0087] [drawer]

[0088] In some embodiments of the present application, referring to Figure 4 , the drawer 10 includes a drawer body 110 and a top cover 120, the top cover 120 is arranged at the top opening of the drawer body 110 and is used for closing and opening the opening, after the top cover 120 is closed, the drawer body 110 and the top cover 120 enclose a closed storage area 130 for storing fruit and vegetable.

[0089] The drawer body 110 and the refrigerator inner tank 20, and the drawer body 110 and the top cover 120 can be provided with a slide and other pull-out structure, facilitating the pull-out action.

[0090] [temperature control structure-heating part]

[0091] In some embodiments of the present application, the temperature in the drawer storage area is adjusted by the heating part 200. It can be understood that the storage area is provided with a temperature sensor 700 for collecting temperature data.

[0092] The heating part 200 can be an electric heating structure, such as a heating wire, which realizes temperature adjustment by closing and opening the heating wire.

[0093] According to the different optimal storage temperature environment of different kinds of tropical fruit and vegetable, a plurality of temperature control intervals are arranged in the storage area of the drawer 100, such as 15-12℃ corresponding to the warm storage mode, 12-9℃ corresponding to the warm storage mode, and 9-6℃ corresponding to the cold storage mode.

[0094] The heating part 200 stops working when the temperature in the storage area 130 reaches the upper limit value of the temperature control interval, and starts working when the temperature in the storage area 130 reaches the lower limit value of the temperature control interval.

[0095] For example, taking the storage of bananas as an example, if the temperature in the storage area of the drawer 100 is higher than 15℃, the heating part is closed and there is no need to heat the storage area; if the temperature in the storage area is lower than 12℃, the heating part is opened to heat the storage area and raise the temperature of the storage area.

[0096] The specific arrangement structure of the heating part 200 is given in two embodiments of the present application. One is to arrange the heating part 200 on the side wall of the drawer 100, and the other is to arrange the heating part 200 on the side wall of the inner container 20 of the storage space 23 where the drawer 100 is located.

[0097] In some embodiments of the present application, the first arrangement mode of the heating part 200 is as shown in Figure 5 At least one side wall of the drawer body 110 is provided with the heating part 200, which is referred to as the built-in heating part. The heating part 200 is a heating wire. When the heating wire is turned on, the storage area 130 is directly heated and warmed up.

[0098] The heating wire is laid in a snail shape or a spiral shape on the side wall of the drawer body 110, so as to increase the heating area and improve the heating efficiency.

[0099] In some embodiments of the present application, in order to improve the temperature uniformity in the storage area of the drawer 100, the heating wire is arranged on the plurality of side walls of the drawer body 110. As shown in Figure 13 The heating wire is arranged on the front wall, the rear wall, and the left wall of the drawer 100.

[0100] In some embodiments of the present application, the second arrangement mode of the heating part 200 is as shown in Figure 7 and Figure 8 The heating part 200 is arranged on the inner container wall of the storage space 23 where the drawer 100 is located, which is referred to as the external heating part. The heating part 200 does not directly heat the storage area of the drawer 100, but heats the storage space 23 where the drawer 100 is located. After the air outside the drawer is warmed up, the heat conduction effect of the drawer wall is utilized to make the storage area of the drawer 100 slowly and stably reach the optimal storage temperature of fruits and vegetables in a relatively long time period.

[0101] The reason for such arrangement is that, on the one hand, fruits and vegetables have temperature adaptability. If the storage environment temperature is quickly raised at a relatively fast rate, there is a temperature difference between the surface and the center of the fruit and vegetable tissue. Due to thermal expansion and cold contraction, the internal stress of tropical fruits and vegetables may be generated, which may cause the skin of the tropical fruits and vegetables to break, the respiration intensity to suddenly increase, and a large amount of nutrients to be consumed, thereby greatly reducing the quality of the tropical fruits. On the other hand, the rapid change of the temperature in the storage environment may cause the temperature to be non-uniform, which is easy to cause condensation on the surface of the tropical fruits and vegetables, thereby accelerating the growth and reproduction of microorganisms and the spoilage of the tropical fruits and vegetables.

[0102] Through the external heating part 200, the natural convection circulation of the air outside the drawer 100 in the heating process is utilized to uniformly raise the temperature of the air outside the drawer 100. The heat conduction of the outer wall of the drawer is utilized to realize the heat transfer between the air outside the drawer and the storage area of the drawer, thereby improving the temperature uniformity in the storage area 130.

[0103] In some embodiments of the present application, with reference to Figure 8 The heating part 200 comprises a heating wire 210, a heat reflecting layer 220, and a heat insulation layer 230, the heat insulation layer 230 is arranged on the inner container wall, the heat reflecting layer 220 is arranged on the heat insulation layer 230, and the heating wire 210 is arranged on the heat reflecting layer 220.

[0104] The heat reflecting layer 220 can be a tin paper layer, which can reflect the heat generated by the heating wire 210 to the rear part into the box, i.e. the space between the inner container 20 and the drawer 100, so that the air temperature in this part of the space is increased to reduce the heat transferred to the inner container 20. After the heat reflecting layer 220, the heat insulation layer 230 is additionally arranged to further prevent the heat from being transferred to the inner container 20 and prevent the inner container 20 from being burned.

[0105] At the same time, the heat reflecting layer 220 and the heat insulation layer 230 reduce the heat transferred to the outside of the refrigerator, reduce the heat loss during heating, and reduce the heating energy consumption of the heating part.

[0106] The heating wire 210 is laid in a snail shape or a spiral shape on the heat reflecting layer 220 to increase the heating area and improve the heating efficiency.

[0107] In some embodiments of the present application, the external heating part 200 has two, one of which is located on the left side of the drawer 100, and the other external heating part 200 is located on the right side of the drawer 100, so that the space between the drawer 100 and the inner container 20 is uniformly heated, and the temperature uniformity in the storage area of the drawer 100 is improved.

[0108] In some embodiments of the present application, a fan (i.e. the internal dehumidification fan described below) 510 is arranged in the storage area 130, with reference to Figure 6 The fan is used to accelerate the air flow in the storage area 130 to improve the temperature uniformity in the storage area 130.

[0109] The heating part 200 adopts a phased control mode, and the heating part 200 cooperates with the fan to realize slow heating of the storage area on the basis of ensuring temperature uniformity, reduce the risk of deterioration of tropical fruits and vegetables caused by too fast heating, and can reduce the module energy consumption.

[0110] Specifically, with reference to Figure 8 When the temperature difference between the temperature in the storage area of the drawer 100 and the start point of the heating part 200 is large, the heating part 200 uses a higher start frequency, and at the same time, the fan in the storage area uses a low-speed and long-time operation scheme;

[0111] When the temperature difference between the temperature in the storage area of the drawer 100 and the start point of the heating part 200 is small, the heating part 200 uses a lower start frequency, and at the same time, the fan in the storage area uses a high-speed and short-time operation scheme.

[0112] In some embodiments of the present application, when the fruits and vegetables are unripe and need to be stored in ripening mode, the heating unit 200 is turned on to increase the temperature, which helps to increase the respiration of the fruits and vegetables and accelerate ripening.

[0113] When the fruits and vegetables are ripe and need to be stored in preservation mode, the heating unit 200 is turned off, and the temperature in the storage area is kept within the critical temperature range of the fruits and vegetables, which helps to inhibit the respiration of the fruits and vegetables and prolong the preservation storage time of the fruits and vegetables.

[0114] [temperature control structure - refrigeration fan]

[0115] When the temperature in the storage area of the drawer 100 is higher than the suitable storage temperature required by the fruits and vegetables, the storage area needs to be cooled.

[0116] Taking the storage of bananas as an example, if the temperature in the storage area of the drawer 100 is higher than 15℃, the heating unit 200 is turned off, and the storage area 130 needs to be cooled to quickly reach the target storage temperature range.

[0117] In some embodiments of the present application, referring to Figure 10 , the drawer 100 is cooled by a rear refrigeration fan (not shown), specifically, the rear wall of the inner container of the storage space 23 where the drawer 100 is located is provided with an air cavity communicating with the refrigeration air duct of the refrigerator, and the air cavity is provided with a refrigeration fan. The air cavity is provided with an air outlet 21 and an air return port 22 on the side facing the storage space 23.

[0118] The refrigeration fan is turned on when the temperature in the storage area reaches the set upper limit value, and the refrigeration fan rotates to blow the cold air in the refrigeration air duct out of the space between the drawer 100 and the inner container 20 through the air outlet 21, thereby cooling the area and cooling the drawer 100.

[0119] The cold energy between the drawer 100 and the inner container 20 can be directly conducted through the cold energy of the drawer wall and transmitted to the storage area; or a ventilation port (not shown) can be opened on the side wall of the drawer 100 to directly introduce cold energy into the storage area. The ventilation port can be provided with an air door which is closed when cooling is not needed.

[0120] During the cooling process, when the storage temperature of tropical fruits and vegetables decreases sharply, cold damage phenomenon is likely to occur, which reduces the sensory quality of the fruits and vegetables, so the storage area needs to reduce the cooling rate as soon as possible to reach the target storage temperature range.

[0121] Therefore, in some embodiments of the present application, the operating power of the refrigeration fan is designed to decrease with the decrease of the temperature in the storage area.

[0122] As the temperature of the storage area of the drawer 100 decreases, the rotation speed of the refrigeration fan is continuously reduced to slow down the temperature decreasing rate. When the temperature in the storage area is in the appropriate storage temperature range, the temperature in the storage area is maintained by starting and stopping the heating unit 200.

[0123] Figure 11 The temperature control flow chart of the combination of the refrigeration fan and the heating unit 200 is shown.

[0124] [Humidity control structure-humidifying unit]

[0125] In some embodiments of the present application, referring to Figure 4 , the storage area 130 is provided with a humidifying unit 300, which provides water vapor to the storage area 130 to increase the humidity in the storage area 130.

[0126] The humidifying unit 300 uses a humidifying water box, which is a common humidifying module in the prior art, and the specific structure is not described in detail in this embodiment.

[0127] The humidifying water box is arranged on the side wall of the drawer body 110, reducing the space occupied in the storage area.

[0128] When the humidity in the storage area of the drawer 100 is lower than the required humidity for storing fruits and vegetables, the humidifying unit 300 is turned on. For example, taking the storage of bananas as an example, if the humidity in the storage area 130 is lower than 90%, the humidifying unit 300 is turned on to increase the humidity in the storage area to the range of 90-95% required for storing bananas.

[0129] When the fruits and vegetables are just put into the drawer 100, the humidity in the drawer 100 is low, which will cause the fruits and vegetables to transpire a large amount of water, which is not conducive to the preservation and storage of the fruits and vegetables. Therefore, the humidifying unit 300 is turned on at this time to increase the humidity in the drawer, thereby reducing the transpiration of the fruits and vegetables.

[0130] However, due to the low temperature outside the drawer 100, the temperature difference between the inside and outside of the drawer 100 will be large, which will cause temperature fluctuations in the drawer. In addition, due to the high humidity in the drawer 100, temperature fluctuations will easily cause condensation, which is not conducive to the storage of fruits and vegetables.

[0131] Therefore, in some embodiments of the present application, a cooling unit is designed to cool the water in the humidifying water box. The cooling unit is turned on when the temperature of the water in the humidifying water box is higher than the measured temperature value in the storage area 130. The humidifying water box is turned on when the temperature of the water in the humidifying water box is lower than the measured temperature value in the storage area 130 and the humidity in the storage area is lower than the set lower limit of the humidity.

[0132] Through the above design, the water temperature in the humidifying water box is always lower than the temperature in the storage area 130, and the air temperature blown out during humidification can be lower than the temperature in the storage area 130, so that the condensation phenomenon caused by high humidity in the storage area 130 can be reduced during humidification.

[0133] In some embodiments of the present application, at least one of the circumferential side walls of the drawer 100 is provided with a heating portion 200, and the circumferential side wall provided with the heating portion 200 is provided with a temperature sensor 700, and the measurement value of the temperature sensor 700 is used as the comparative reference temperature data for starting and stopping the cooling portion. That is, the measurement data of the temperature sensor 700 is used as the temperature data in the storage area 130, and the cooling portion determines whether to start or stop according to the comparison between the temperature data and the water temperature data in the water box.

[0134] In some embodiments of the present application, a plurality of circumferential side walls of the drawer 100 are provided with heating portions 200, and each heating portion 200 is started and stopped according to the temperature data detected by the corresponding temperature sensor 700, so that the temperatures of the circumferential side walls are equal, that is, the temperatures of each circumferential side wall of the drawer 100 are the same, and the temperature uniformity in the storage area 130 is ensured

[0135] A specific embodiment is given in the present case, referring to Figure 13 and Figure 14 The front wall, rear wall, and left side wall of the drawer body 110 are respectively provided with heating portions 200 and temperature sensors 700, and the humidifying water box is provided with a temperature sensor (not shown) for detecting the water temperature. When the user puts in tropical fruits and vegetables that need to be preserved, the preservation mode is started. The temperature sensor 700 on the inner wall of the drawer 100 operates to sense the temperature of each inner wall and record the highest value (Tmax) and the lowest value (Tmin) among the data obtained by the three temperature sensors on the side walls of the drawer and the water temperature Tw.

[0136] When Tw>Tmax, the three heating portions 200 start to work, and when the temperatures of the three temperature sensors on the inner wall of the drawer 100 are equal to Tw, the heating portions 200 stop working, and at this time the cooling portion is started to cool the water in the humidifying water box;

[0137] When Tmin≤Tw≤Tmax, the heating portion 200 on the inner wall with a temperature lower than Tmax works, and when the temperature is equal to Tmax, the heating portion 200 stops working, and at this time the cooling portion is started to cool the water in the humidifying water box;

[0138] When Tw

[0139] For the structure design of the cooling portion, the present application gives two air types.

[0140] The first way of the cooling part, in some embodiments of the present application, the cooling part 100 is a cooling fan (not shown) arranged in the humidification water box. When the cooling fan is turned on, the water in the water box can be cooled.

[0141] The second way of the cooling part, in some embodiments of the present application, referring to Figure 13 , the cooling part is a ventilation port arranged on the drawer 100 and communicating with the humidification water box. The ventilation port communicates with the refrigeration air duct of the refrigerator. The ventilation port is used to deliver cold air to the humidification water box to cool the water in the humidification water box. A damper 310 is arranged at the ventilation port to close and open the ventilation port.

[0142] When the humidification water box needs to be cooled, the damper 310 is opened. When the humidification water box does not need to be cooled, the damper 310 is closed.

[0143] [Humidity control structure - moisture-permeable membrane, dehumidification fan]

[0144] Since the drawer 100 forms a closed storage area 130, the storage temperature of tropical fruits and vegetables is relatively high, and their respiration is inevitable. Even low-intensity respiration will produce moisture, which accumulates in the storage area 130. When the humidity in the storage area 130 is higher than 95%, the tropical fruits and vegetables are prone to spoilage. Therefore, it is necessary to remove the excess moisture.

[0145] In some embodiments of the present application, a moisture-permeable membrane 400 is arranged on the drawer 100, specifically on the top cover 120. Referring to Figure 6 , the moisture-permeable membrane 400 is used to allow the moisture in the storage area 130 to flow outwards unidirectionally when the humidity in the storage area 130 reaches a set upper limit value, so as to reduce the humidity in the storage area 130.

[0146] The moisture-permeable membrane 400 is a high-humidity moisture regulation membrane that only allows moisture to flow out unidirectionally. When the relative humidity on the inner side of the membrane is low, the moisture permeation rate is low to prevent moisture loss. When the relative humidity is high, the moisture permeation rate is high to remove excess moisture.

[0147] In some embodiments of the present application, referring to Figure 6 , the inner side of the top cover 120 is provided with an inner dehumidification fan 510. The inner dehumidification fan 510 is arranged close to the moisture-permeable membrane 400. The inner dehumidification fan 510 is used to discharge the air in the storage area 130 to the outside through the moisture-permeable membrane 400.

[0148] When it is necessary to reduce the humidity in the storage area 130, the inner dehumidification fan 510 is turned on to accelerate the flow of air in the storage area 130, accelerate the rate of air discharge to the outside through the moisture-permeable membrane 400, and speed up the dehumidification speed.

[0149] In some embodiments of the present application, referring to Figure 10The outer side of the top cover 120 is further provided with an outer dehumidification fan 520, which is also arranged close to the moisture permeable membrane 400. The inner dehumidification fan 510 and the outer dehumidification fan 520 are used to operate at different rotating speeds to adjust the water vapor pressure difference between the inner and outer sides of the moisture permeable membrane 400, and to adjust the rate of moisture in the storage area 130 flowing out through the moisture permeable membrane 400.

[0150] The inner dehumidification fan 510 and the outer dehumidification fan 520 operate at different rotating speeds to make the air speed on both sides of the moisture permeable membrane 400 different. According to Bernoulli's effect, the greater the flow rate of a fluid, the smaller the pressure. Reducing the moisture pressure on the outer side of the membrane can accelerate the moisture permeation.

[0151] The storage area 130 is provided with an inner humidity sensor for detecting the humidity in the storage area. The storage space 23 (i.e. the outer side of the drawer 100) is provided with an outer humidity sensor for detecting the humidity in the storage space 23. The inner dehumidification fan 510 and the outer dehumidification fan 520 operate at different rotating speeds according to the detection data of the inner humidity sensor and the outer humidity sensor.

[0152] Specifically, referring to Figure 12 When the actual humidity in the storage area 130 and the preset humidity difference is large, the rotating speed difference of the outer dehumidification fan 520 and the inner dehumidification fan 510 is increased, and then the water vapor pressure difference between the inner and outer sides of the moisture permeable membrane 400 is increased, so as to accelerate the moisture permeation of the storage area 130 through the moisture permeable membrane, and then the purpose of rapid dehumidification is achieved.

[0153] When the actual humidity in the storage area and the preset humidity difference is small, the rotating speed difference of the outer dehumidification fan 520 and the inner dehumidification fan 510 is reduced, and then the gas pressure difference between the inner and outer sides of the moisture permeable membrane 400 is reduced, so as to reduce the rate of moisture permeation of the storage area 130 through the moisture permeable membrane, and then the humidity in the storage area 130 is stabilized to reach the target humidity.

[0154] In some embodiments of the present application, in order to better control the humidity, referring to Figures 15 to 18 The inner side of the inner dehumidification fan 510 is provided with a magnetic sensitive part 810 made of a magnetic sensitive material. The magnetic sensitive part 810 has an extending part 811 extending out of the inner dehumidification fan 510. The extending part 811 extends towards the moisture permeable membrane 400. An electromagnetic coil 820 is arranged above the extending part 811.

[0155] The electromagnetic coil 820 generates magnetism after being electrified. The extending part 811 is displaced towards the electromagnetic coil 820 under the magnetic action of the electromagnetic coil 820, that is, the extending part 811 is upwardly offset by a certain angle, so that the air flowing out of the storage area 130 is deviated towards the moisture permeable membrane 400, so that the moisture in the storage area 130 permeates through the moisture permeable membrane 400 more quickly, and the dehumidification speed is improved.

[0156] In some embodiments of the present application, the electromagnetic coil 820 has multiple working power levels, and the working power of the electromagnetic coil 820 increases with the increase of the humidity in the storage area 130, so as to increase the dehumidification rate.

[0157] Specifically, when the humidity in the storage area 130 is less than 85%, the electromagnetic coil 820 does not work; when the humidity is greater than 85%, the electromagnetic coil 820 starts to work at level 1 (lower power), at this time the electromagnetic coil 820 has a certain magnetic property, attracting the extension part 811 to offset a small angle upward, so that the wind blown from the storage area 130 is slightly offset to the direction of the moisture permeable film 400; when the humidity is greater than 90%, the electromagnetic coil 820 starts to work at level 2 (higher power), and the magnetic property is greater, at this time the extension part 811 offsets a larger angle upward, so that the wind blown from the storage area 130 is offset to the moisture permeable film 400, so that the excess moisture can pass through the moisture permeable film 400 faster, and the humidity in the storage area 130 is controlled at about 90%.

[0158] [Removal of ethylene]

[0159] When the temperature and humidity in the storage area 130 are within the most suitable storage range for tropical fruits and vegetables, the storage environment at this time is in a high-temperature and high-humidity state (14°C, 90% RH) compared to the 4°C and about 50% humidity of a general refrigerator. Such a storage environment can cause two problems: first, because tropical fruits and vegetables have high sugar content and are in a high-temperature and high-humidity environment, microorganisms breed faster, so it is easier to cause the tropical fruits and vegetables to rot; second, the high-temperature and high-humidity environment can increase the release of ethylene by the tropical fruits and vegetables, and ethylene can promote the respiratory burst of tropical fruits and vegetables, enhance the respiration, and accelerate the consumption of nutrients of tropical fruits and vegetables, which is not conducive to storage.

[0160] To address the problem that microorganisms breed more easily, a more powerful sterilization technology such as ion sterilization technology needs to be used, which can generate active ingredients such as negative ions, oxygen free radicals, and hydroxyl radicals, and the sterilization module needs to run for a longer time, in combination with air circulation, to achieve better sterilization effect.

[0161] Ethylene has a dual effect on tropical fruits and vegetables. When tropical fruits and vegetables are not yet mature, ethylene can promote their maturation, making the fruits taste better. When tropical fruits and vegetables are mature, ethylene can accelerate their decay. Because the storage area in the drawer is a closed structure and ethylene cannot pass through the moisture permeable film, the special area can accumulate ethylene and has the function of accelerating the ripening of tropical fruits and vegetables. When the tropical fruits and vegetables are mature, ethylene is not conducive to the storage of tropical fruits and vegetables at this time, and oxygen free radicals generated by the ion sterilization device can oxidize and remove ethylene, thereby prolonging the shelf life of tropical fruits and vegetables.

[0162] In summary, in some embodiments of the present application, the ethylene removal unit 600 is arranged in the storage area 130, which is specifically an ion sterilization device. On the one hand, the active ingredients generated by the ion sterilization device, such as negative ions, oxygen free radicals, and hydroxyl radicals, have strong sterilization effect, which can prevent the breeding of microorganisms in the storage area. On the other hand, the oxygen free radicals generated by the ion sterilization device can oxidize and remove ethylene, thereby prolonging the preservation period of tropical fruits and vegetables.

[0163] That is, the ion sterilization device is turned on at two time points. First, the ion sterilization device is turned on when the tropical fruits and vegetables are just put into the drawer, so as to sterilize the storage area 130 and prevent the breeding of microorganisms. Second, the ion sterilization device is turned on when the tropical fruits and vegetables in the storage area 130 are ripe, so as to achieve the sterilization effect and remove ethylene, thereby prolonging the preservation period of the fruits and vegetables.

[0164] [Detection and control of fruit and vegetable maturity]

[0165] It is difficult for consumers to control the maturity of the purchased tropical fruits and vegetables in the storage environment at home. If the fruits and vegetables are placed at room temperature, they will soon be overripe. The low-temperature environment of the refrigerator will cause cold damage to the tropical fruits and vegetables. Even if the consumer places the tropical fruits and vegetables at a temperature of 10-15°C which is suitable for storage, it is difficult to control the maturity of the fruits and vegetables to the best and prolong the time of the fruits and vegetables staying at the best maturity.

[0166] Fruits and vegetables in different states of maturity need to be stored in different environments. For example, if the fruits and vegetables are not ripe, the fruits and vegetables need to be ripened, at which time the temperature, humidity, and ethylene content in the storage area need to be increased accordingly, so that the fruits and vegetables can quickly reach the maturity suitable for consumption. If the fruits and vegetables are ripe, the fruits and vegetables need to be preserved, at which time the temperature, humidity, and ethylene content in the storage area need to be reduced accordingly, so as to inhibit the respiration of the fruits and vegetables and prolong the preservation time of the fruits and vegetables. If the fruits and vegetables are not ripe, and the consumer wants the fruits and vegetables to mature slowly, the temperature, humidity, and ethylene content in the storage area can be reduced to inhibit the respiration of the fruits and vegetables and prolong the storage time of the fruits and vegetables.

[0167] Therefore, another important point of the present application is to detect and analyze the maturity of the tropical fruits and vegetables, and control the operation of the heating unit 200, the humidifying unit 300, and the ethylene removal unit 600 according to the maturity and the storage requirements of the user, so as to provide a most suitable storage environment for the fruits and vegetables.

[0168] Fruits and vegetables have a suitable storage temperature range and a cold damage critical temperature range, as shown in FIGS. 1 and 2. Figure 1 and Figure 2 The storage method of the refrigerator in the present application is as follows:

[0169] When the system identifies that the fruits and vegetables have not reached the optimal maturity, the refrigerator enters the ripening mode, i.e., the fruits and vegetables are ripened, the heating part 200 is turned on or off according to the temperature in the storage area 130, so that the temperature in the storage area 130 is within the suitable storage temperature range of the fruits and vegetables, and the ethylene removal part 600 is turned off, the ethylene content is increased, the respiration of the fruits and vegetables is improved, and the ripening is accelerated.

[0170] When the system identifies that the fruits and vegetables have reached the optimal maturity, the refrigerator enters the preservation mode, i.e., the fruits and vegetables are preserved, the heating part 200 is turned on or off according to the temperature in the storage area, so that the temperature in the storage area 130 is within the critical temperature range of the fruits and vegetables, and the ethylene removal part 600 is turned on, the temperature is reduced, the ethylene content is reduced, the respiration of the fruits and vegetables is inhibited, and the time of the fruits and vegetables staying at the optimal maturity is maximized.

[0171] For the detection of the maturity of the fruits and vegetables, the present application adopts the color selection method. Specifically, the storage area 130 is provided with a photoelectric detection module (not shown), which is used to obtain the color change of the fruits and vegetables in the storage area. The system judges the maturity of the fruits and vegetables according to the color change, so as to control the operation of the heating part 200, the humidifying part 300, and the ethylene removal part 600.

[0172] The photoelectric detection module includes a detection element, a color selection method, and a background device.

[0173] The photoelectric detection module is a detection system applied to a color sorter. The principle is that under the action of a light source, a photoelectric color sensor receives a light signal from an object and identifies the optical characteristic difference of the detected object.

[0174] The color sorter has been applied since the 1980s and is a very common device in agricultural production, which is applied to the sorting of rice, coarse grains, tea, and seed color particles. However, the color sorter also includes a feeding system and needs to be screened out by a photoelectric detection system to identify color particles.

[0175] The photoelectric detection module in the present method is mounted in the compartment of the refrigerator. The color change of the fruits and vegetables in the compartment is obtained by the reflected optical signal of the fruits and vegetables under the irradiation of a light source. The light source used by the system only needs visible light, and the cost is relatively low. Therefore, the method is feasible.

[0176] The light source can be a common incandescent lamp, LED lamp, or halogen lamp, which is used to irradiate the stored tropical fruits and vegetables.

[0177] The background plate is a variable background device, and the color can be adjusted adaptively.

[0178] The detection element uses visible light irradiation, and a double-line array CCD (solid-state imaging sensor) receives the reflected light of the tropical fruits and vegetables irradiated by the light source.

[0179] The embodiment adopts a photoelectric detection module to acquire the color degree of fruits and vegetables in the chamber, and converts it into an electric control signal. Specifically, referring to Figure 19 The chamber is irradiated by a light source, and the fruits and vegetables are observed by the light refracted by the background plate, and are photographed by a double-line array CCD camera. The color signal of the photographed fruits and vegetables and the color difference signal formed by the contrast color of the background plate. When the color difference of the relatively mature fruits and vegetables is small, the photoelectric receiver does not generate a pulse signal when the detection point is detected; when the color difference of the relatively mature fruits and vegetables is large, the light signal will be abnormal, and a pulse signal will be generated. After discrimination operation, an electric control signal is output.

[0180] When the photoelectric detection module does not generate a pulse signal after detecting the fruits and vegetables in the chamber, it means that the fruits and vegetables have entered the mature period, and the fresh-keeping storage mode is started.

[0181] If the photoelectric detection module generates a pulse signal after detecting the fruits and vegetables in the chamber, it means that the fruits and vegetables are not mature, and the ripening storage mode is started.

[0182] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0183] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1.A refrigerator comprising: a cabinet; a liner arranged in the cabinet, the liner enclosing a plurality of storage spaces for storing items; characterized in that the refrigerator further comprises: a drawer having at least one, the drawer being arranged in the storage space, the drawer forming a closed storage area for storing fruits and vegetables; a heating unit for adjusting the temperature in the storage area; a moisture-permeable membrane arranged on the drawer, the moisture-permeable membrane allowing the moisture in the storage area to flow outwards unidirectionally when the humidity in the storage area is greater than the external humidity, so as to adjust the humidity in the storage area; an ethylene removal unit arranged in the storage area for removing ethylene in the storage area; a photoelectric detection module arranged in the storage area for obtaining the color change of fruits and vegetables in the storage area, the system determining the maturity of fruits and vegetables according to the color change, thereby controlling the operation of the heating unit and the ethylene removal unit; a moisture-permeable membrane and an internal dehumidification fan are arranged on the top wall of the drawer, the internal dehumidification fan is arranged close to the moisture-permeable membrane, the internal dehumidification fan is arranged on the inner side of the top wall of the drawer, and the internal dehumidification fan is used to discharge the air in the storage area outwards; a magnetically sensitive part is arranged on the inner side of the internal dehumidification fan, the magnetically sensitive part has an extension part extending out of the internal dehumidification fan, the extension part extends towards the moisture-permeable membrane, an electromagnetic coil is arranged above the extension part, and the extension part is displaced towards the electromagnetic coil under the magnetic action of the electromagnetic coil. 2.The refrigerator according to claim 1, characterized in that: fruits and vegetables have a suitable storage temperature range and a cold damage critical temperature range; when the system analyzes that the fruits and vegetables have not reached the optimal maturity, the refrigerator enters a ripening mode, the heating unit is turned on or off according to the temperature in the storage area to make the temperature in the storage area within the suitable storage temperature range, and the ethylene removal unit is turned off; when the system analyzes that the fruits and vegetables have reached the optimal maturity, the refrigerator enters a preservation mode, the heating unit is turned on or off according to the temperature in the storage area to make the temperature in the storage area within the cold damage critical temperature range, and the ethylene removal unit is turned on. 3.The refrigerator according to claim 1, characterized in that: the heating unit is arranged on the liner wall of the storage space where the drawer is located, and is used to adjust the temperature of the storage space where the drawer is located, the heating unit comprises a heating wire, a heat reflection layer, and a thermal insulation layer, the thermal insulation layer is arranged on the liner wall, the heat reflection layer is arranged on the thermal insulation layer, and the heating wire is arranged on the heat reflection layer. 4.The refrigerator according to claim 1, characterized in that: a wind cavity in communication with the refrigeration air duct of the refrigerator is arranged on the rear wall of the liner of the storage space where the drawer is located, a refrigeration fan is arranged in the wind cavity, and an air outlet and an air return are arranged on the side of the wind cavity facing the storage space; the refrigeration fan is turned on when the temperature in the storage area reaches a set upper limit value. 5.The refrigerator according to claim 1, characterized in that: The electromagnetic coil has multiple working power levels, and the working power of the electromagnetic coil increases with the increase of the humidity in the storage area. 6.The refrigerator of claim 1, wherein, An outer dehumidification fan is arranged outside the top wall of the drawer and is arranged close to the moisture permeable membrane, and the inner dehumidification fan and the outer dehumidification fan are used to operate at different rotating speeds to adjust the water vapor pressure difference between the inner and outer sides of the moisture permeable membrane, and to adjust the rate of moisture outflow from the storage area through the moisture permeable membrane. 7.The refrigerator of any one of claims 1 to 6, wherein, A humidification water box is arranged in the storage area to adjust the humidity in the storage area; A cooling part for cooling the water in the humidification water box is arranged on the humidification water box, and the cooling part is turned on when the temperature of the water in the humidification water box reaches a measured temperature value in the storage area. 8.The refrigerator of claim 7, wherein, The cooling part is a cooling fan arranged in the humidification water box; or A ventilation opening arranged on the drawer and communicating with the humidification water box, the ventilation opening communicating with a refrigeration air duct of the refrigerator, the ventilation opening being used to deliver cold air to the humidification water box to cool the water in the humidification water box, and a damper for closing and opening the ventilation opening being arranged at the ventilation opening.

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