refrigerator

Abstract

The present invention provides a refrigerator, which includes: a box body, a storage device, and a refrigeration unit; a side wall of the storage device is provided with a moisture-permeable membrane, and a second humidity sensor, a temperature sensor, and a plurality of cameras are provided therein; a first fan is provided on the storage device, and the first fan is located on a side of the side wall close to the storage room, and its air outlet faces the moisture-permeable membrane, and the air flow flowing out of the air outlet of the first fan flows along the surface of the moisture-permeable membrane; the air passing through the refrigeration unit is cooled to form a low-temperature airflow, and then enters the storage room and flows through the moisture-permeable membrane; a controller controls the temperature of the air according to the storage temperature T i Control the refrigeration unit to operate to adjust the temperature in the storage cavity; when γ≥γ0, the controller controls the dehumidification process; then, according to the storage humidity R N , Storage humidity change rate α r The first fan is controlled to operate to adjust the humidity; the present invention quickly adjusts the storage temperature and dehumidifies efficiently, thereby preventing food from being blown by the wind due to dehumidification and causing moisture loss, thereby preventing food from becoming moldy and improving the moisturizing and preservation effects.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigerators, and in particular relates to a refrigerator. Background Art

[0002] Currently, there are two major defects in refrigerators with adjustable humidity drawers on the market. First, it is difficult to take into account the humidity control effects of different gears at the same time, and the following situations often occur: for example, the high moisturizing gear has poor moisturizing effect, and leafy vegetables that require a high humidity environment will dry out; or when the drawer is set to the high humidity gear, the humidity in the drawer is too high, resulting in condensation. When set to the medium or low humidity gear, if citrus fruits, melons and other ingredients suitable for medium and low humidity are stored, the high humidity will cause mold.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] In view of the above technical problems, the present invention provides a refrigerator.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A refrigerator comprising:

[0007] a box body defining a storage room;

[0008] a storage device housed in the storage room; the storage device defining a sealed storage cavity, and a communication port formed on a side wall of the storage device; the storage cavity being provided with a second humidity sensor for detecting humidity therein, a temperature sensor for detecting temperature therein, and a plurality of cameras for capturing images of the storage cavity from different angles;

[0009] a moisture-permeable membrane disposed at the communication port of the storage device;

[0010] a first fan disposed on a side wall of the storage device having the moisture-permeable membrane and located on a side of the side wall close to the storage compartment; an air outlet of the first fan facing the moisture-permeable membrane, and air flowing out of the air outlet of the first fan flowing along a surface of the moisture-permeable membrane;

[0011] A refrigeration unit having a second air outlet corresponding to the position of the moisture permeable membrane; a low-temperature air flow formed by the refrigeration unit enters the storage room through the second air outlet and flows through the moisture permeable membrane;

[0012] The controller is configured to obtain the storage temperature T in the storage cavity after the storage device enters the storage mode. i , food space ratio γ, storage humidity R N , Storage humidity change rate α r ;

[0013] In T i >T N0 When the temperature in the storage cavity reaches the storage temperature threshold T of the storage mode, the controller controls the refrigeration unit to work. N0 ;

[0014] When γ≥γ0, the controller controls the process to enter the dehumidification program; the dehumidification program includes:

[0015] In α r1 ≤α r <α r2 And R N ≥R Z1 When the controller controls the first fan to operate at the first power P1, the storage humidity in the storage cavity is R N Reaching the storage humidity threshold R Z0 ;

[0016] Among them, γ0 is the threshold of food proportion, α r1 is the first humidity change rate threshold, α r2 is the second humidity change rate threshold, R Z0 is the storage humidity threshold in the storage mode, R Z1 is the first humidity threshold; R Z0 <R Z1 .

[0017] As an practicable method, the dehumidification process includes: r2 ≤α r And R N ≥R Z2 When the first fan is operated at the second power P2, the controller controls the first fan to operate until the storage humidity R in the storage cavity reaches N Reaching the storage humidity threshold R Z0 ;

[0018] Among them, R Z2 is the second humidity threshold; R Z1 <R Z2 , P2>P1.

[0019] As an implementable manner, the rated power of the first wind turbine is recorded as P0, P1<P0<P2.

[0020] As an implementable manner, P1 = 50% P0, P2 = 100% P0 or P2 = 120% P0.

[0021] As an practicable manner, a second fan is provided in the storage chamber; and the dehumidification process includes:

[0022] In RN ≥R2, the second fan starts, and the first fan and the second fan work at the same time; wherein R2 is the second dehumidification threshold, R2>R Z2 .

[0023] As an practicable method, a second fan is provided in the storage chamber; the dehumidification process includes: r2 ≤α r And R N ≥R Z2 When the first fan and the second fan work simultaneously, the storage humidity in the storage cavity is R N Reaching the storage humidity threshold R Z0 .

[0024] As an practicable manner, the controller obtains the storage device continuous closing time t, and after the storage device continuous closing time reaches a set time threshold t0, at the storage temperature T i Storage temperature threshold T N0 When the temperature of the refrigeration unit is lowered to R i Reaching the storage temperature threshold T N0 .

[0025] As an practicable manner, the storage device is provided with an operation panel, and the operation panel is used to select a storage mode;

[0026] Among them, the operation panel is set with a fruit and vegetable constant temperature mode button and a fresh constant humidity mode button; each set storage mode is set with its own corresponding storage temperature threshold T N0 and storage humidity threshold R Z0 ; Storage temperature threshold T for fresh food constant humidity mode N0 Less than the storage temperature threshold T of the fruit and vegetable constant temperature mode N0 .

[0027] As an implementable approach, the storage humidity threshold R Z0 Set as humidity range; the intersection of humidity ranges corresponding to different humidity thresholds is an empty set; the storage temperature threshold R N0 Set as temperature range; the intersection of temperature ranges corresponding to different temperature thresholds is an empty set.

[0028] As an practicable manner, the second fan is arranged on the side wall of the storage device having a moisture permeable membrane and is adjacent to the moisture permeable membrane; the air outlet of the second fan faces the moisture permeable membrane, and the air flow flowing out of the air outlet of the second fan flows along the surface of the moisture permeable membrane.

[0029] Compared with the prior art, the advantages and positive effects of the present invention are:

[0030] The present invention provides a refrigerator, comprising: a box body defining a storage room, a storage device accommodated in the storage room, and a controller; the storage device defines a sealed storage cavity, and a communication port is formed on a side wall of the storage device; a second humidity sensor for detecting the humidity in the storage cavity, a temperature sensor for detecting the temperature therein, and a plurality of cameras for taking images of the storage cavity from different angles are arranged in the storage cavity; a moisture-permeable membrane is provided at the communication port of the storage device; a first fan is provided on the side wall of the storage device having the moisture-permeable membrane, the first fan is located on a side of the side wall close to the storage room, and an air outlet of the first fan faces the moisture-permeable membrane; the air flow discharged from the air outlet of the first fan flows along the surface of the moisture-permeable membrane; the controller is configured to obtain the storage temperature T in the storage cavity after the storage device enters the storage mode i , food space ratio γ, storage humidity R N , Storage humidity change rate α r ; in T i >T N0 When the temperature in the storage cavity reaches the storage temperature threshold T of the storage mode, the controller controls the refrigeration unit to work. N0 ; When γ≥γ0, the controller controls to enter the dehumidification program; the dehumidification program includes: r1 ≤α r <α r2 And R N ≥R Z1 When the controller controls the first fan to operate at the first power P1, the storage humidity in the storage cavity is R N Reaching the storage humidity threshold R Z0 ; Among them, α r1 is the first humidity change rate threshold, α r2 is the second humidity change rate threshold, R Z0 is the storage humidity threshold in the storage mode, R Z1 is the first humidity threshold; R Z0 <R ZOn the one hand, the present invention timely adjusts the temperature in the storage cavity through the refrigeration unit to keep the temperature therein constant; on the other hand, the present invention effectively increases the airflow velocity on the surface of the moisture-permeable membrane by turning on the first fan to dehumidify efficiently and quickly, thereby preventing the food from being blown away by the wind due to dehumidification and causing moisture loss, thereby enhancing the dehumidification effect, and preventing the food from becoming moldy due to excessive humidity in the storage cavity, thereby effectively improving the moisturizing and preservation effect; in addition, the controller controls the first fan to operate at a specific power according to the two factors of humidity change rate and storage humidity. On the one hand, it can quickly adjust the humidity in the storage cavity to maintain a constant humidity in the storage cavity; on the other hand, it can specifically control the operating power of the fan to reduce energy consumption. The setting of the present invention can effectively control the storage cavity in a constant temperature and humidity state, comprehensively improve the preservation effect, and enhance product quality. In addition, the present invention starts the dehumidification program when the food space occupancy reaches the set value, and can effectively and specifically control the influence of the food on the humidity to maintain the constant humidity state of the storage cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the overall structure of the refrigerator of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the storage device of the refrigerator of the present invention;

[0033] Figure 3 This is a schematic structural diagram of the storage device of the refrigerator of the present invention in an open state;

[0034] Figure 4 A schematic diagram of a portion of the structure of a storage device of a refrigerator according to the present invention;

[0035] Figure 5 A schematic diagram of a partial structure of a storage device of a refrigerator according to the present invention from another perspective;

[0036] Figure 6 A schematic structural diagram of the storage device of the refrigerator of the present invention from another perspective;

[0037] Figure 7 This is a schematic diagram of the structure of the storage device portion of the refrigerator of the present invention;

[0038] Figure 8 Schematic diagram of the structure of the moisture permeable membrane and the bracket of the refrigerator of the present invention;

[0039] Figure 9 is a cross-sectional view of a refrigeration unit of a refrigerator of the present invention;

[0040] Figure 10 is a cross-sectional view of the refrigeration unit of the refrigerator of the present invention from another perspective;

[0041] Figure 11 It is a structural schematic diagram of the refrigeration unit of the refrigerator of the present invention;

[0042] Figure 12 A schematic structural diagram of the refrigeration unit of the refrigerator of the present invention from another perspective;

[0043] Figure 13 Schematic diagram of the constant humidity control method for a refrigerator according to the present invention;

[0044] Figure 14 This is an overall schematic diagram of another embodiment of the constant humidity control method for a refrigerator of the present invention;

[0045] Figure 15 This is a schematic diagram of another embodiment of the constant humidity control method for a refrigerator according to the present invention. In the above figures: storage compartment 1; storage device 2; storage cavity 3; moisture-permeable membrane 4; first fan 5; second fan 6; housing 7; drawer 8; bracket 9; cabinet 10; operating panel 11; first side 12; second side 13; cover 14; liner 15; fan accommodating cavity 21; supply fan 22; first air duct 23; second air duct 24; return air duct 25; first air supply port 26; second air supply port 27; return air port 28; first damper 20; second damper 29. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to specific embodiments so that those skilled in the art can better understand and implement the present invention. However, the scope of protection claimed in the present invention is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other in any manner unless there is a conflict.

[0047] It should be noted that the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0048] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] A refrigerator, such as Figures 1-8As shown, the refrigerator includes an insulated housing 10; the housing 10 includes an outer shell and an inner liner 15. The inner liner 15 defines multiple insulated storage compartments 1 for storing food and other items. In this embodiment, these storage compartments 1 are a refrigerator compartment located at the top and a freezer compartment located at the bottom. The storage compartments 1 can be closed by corresponding doors. It should be noted that the location of the refrigerator and freezer compartments is not limited to an upper and lower arrangement, such as the condensing chamber and the freezer compartment being arranged side by side. Of course, the number of storage compartments is not limited to two.

[0050] A storage device 2 is provided in the storage room 1. The storage device 2 defines a sealed storage cavity 3, and a communication port is formed on one side wall of the storage device 2, with a moisture-permeable membrane 4 provided at the communication port. A first fan 5 is provided on the side wall of the storage device 2 having the moisture-permeable membrane 4. The first fan 5 is located on the side of the side wall close to the storage room 1. The first fan 5 is adjacent to the moisture-permeable membrane 4, and the air outlet of the first fan 5 faces the moisture-permeable membrane 4. The airflow from the air outlet of the first fan 5 flows along the surface of the moisture-permeable membrane 4. The sealed storage cavity 3 is provided as described above. The storage cavity 3 and the storage room 1 exchange moisture through the moisture-permeable membrane 4 provided at the communication port, but no gas exchange occurs, so that the storage cavity 3 is not affected by the airflow of the external environment (storage room).

[0051] The refrigerator is provided with a controller, and a first humidity sensor is provided in the storage room 1 to monitor the humidity in the storage room 1; in this example, the first humidity sensor is provided on the rear wall of the storage room 1 and corresponds to the position of the storage device 2; a second humidity sensor is provided in the storage cavity 3 to monitor the humidity in the storage cavity 3. When the humidity in the storage cavity 3 is greater than the humidity in the storage room 1 and reaches a first threshold, the controller controls the first fan 5 to operate, and the air flow flowing out of the air outlet of the first fan 5 flows along the surface of the moisture permeable membrane 4 to flow through the moisture permeable membrane 4; the air flow on the side of the moisture permeable membrane 4 close to the storage room 1 is accelerated, and the humidity value outside the sealed storage cavity 3 (especially the moisture permeable membrane 4) is reduced, forming a larger humidity difference, preventing the moisture permeable membrane 3 from being reduced in efficiency or completely failing so that the water vapor in the storage cavity 3 cannot be discharged, thereby improving the moisture permeability, and thus reducing the water vapor generated by the food from gathering inside the storage cavity 3 to form condensation or frost, avoiding condensation in the storage cavity 3 and causing the food to become moldy, and at the same time, it can prevent the food from being blown by the wind during the dehumidification process and causing moisture loss; in addition, it can also promote the air flow in the storage room 1 and promote the uniformity of its internal cooling capacity.

[0052] The first humidity threshold is set based on the ideal humidity for the food being stored. When configuring the refrigerator, various thresholds can be preset for different food types and storage volumes, allowing users to choose from a variety of settings, enabling more targeted humidity control.

[0053] As an implementable method, an operation panel 11 is provided on the upper wall of the storage device 2 for the user to select a storage mode. In this embodiment, the storage mode is provided with a constant humidity mode for fruits and vegetables and a constant humidity mode for fresh produce; wherein, in the constant humidity mode for fruits and vegetables, the temperature in the storage cavity 3 is consistent with the temperature in the storage room 1 (refrigerated room), which is about 3°C-8°C. Since the storage cavity 3 exchanges water vapor with the refrigerator through the moisture-permeable membrane 4, in the constant humidity mode for fruits and vegetables, the humidity in the storage cavity 3 mainly comes from the transpiration of the fruits and vegetables themselves, and the relative humidity in the storage cavity 3 reaches 80%-90%. The constant humidity mode for fruits and vegetables is a general mode of the storage device. In the constant humidity mode for fresh produce, the storage temperature in the storage cavity 3 is lower than that in the constant humidity mode for fruits and vegetables, and the set temperature is -3°C-0°C. A temperature sensor for monitoring the temperature therein is provided in the storage cavity. The operation panel 11 is equipped with a storage mode button, allowing the user to select the storage mode within the storage chamber 3 that best preserves the food. This configuration achieves targeted humidity control for the food, improving preservation and product quality, and enhancing the user experience. As an implementation, the storage device 2 includes a housing 7 and a retractable or push-in drawer 8. The operation panel 11 is located on the top wall of the housing 7, near the refrigerator door, for easy user operation.

[0054] In this embodiment, a cover 14 is provided at the communication port, defining a chamber to house the breathable membrane 4. In this embodiment, the chamber formed by the cover 14 is located on the side wall of the storage device 2, near the rear wall of the storage compartment 1. This prevents the drawer 8 from contacting and damaging the breathable membrane 4 when the drawer 8 is fully accommodated within the storage chamber 3. This effectively protects the breathable membrane 4 from collisions with components outside the storage device 2. The cover 14 is formed with multiple ventilation holes to allow airflow from the first blower 5 to pass through and across the surface of the breathable membrane. In this embodiment, the cover 14 is integrally formed with the side wall of the storage device 2 for ease of processing.

[0055] As another feasible method, a second fan 6 is provided in the storage cavity 3 to promote the flow and mixing of air in the storage cavity 3 to prevent condensation from forming in the storage cavity 3 due to excessive humidity, which may cause the food to become moldy.

[0056] When the humidity in the storage chamber 3 exceeds the humidity in the storage room 1 and reaches a second threshold (where the second threshold is greater than the first threshold), the humidity in the storage chamber 3 is even higher. At this point, the first and second fans 5 and 6 operate simultaneously. The first fan 5 effectively increases the airflow velocity through the moisture-permeable membrane 4, effectively increasing the water vapor transmission rate of the membrane 4 for rapid dehumidification. The second fan 6 operates to promote mixing of air in the storage chamber 3, preventing condensation from forming in the storage chamber 3 due to excessive humidity, which could cause food mold. The second threshold is set based on the humidity at which mold may occur in the stored food.

[0057] In this embodiment, the second fan 6 is positioned on the side wall of the storage device 2 where the moisture-permeable membrane 4 is located, adjacent to the membrane 4. The outlet of the second fan 6 faces the membrane 4, and the airflow from the outlet of the second fan 6 flows along the surface of the membrane 4. The airflow from the outlet of the second fan 6 promotes air flow within the storage cavity 3 to prevent condensation caused by excessive humidity. Furthermore, the airflow generated by the second fan 6 flows through the membrane 4, accelerating the water vapor transmission rate of the membrane 4 and rapidly removing moisture, thereby preventing condensation caused by excessive humidity. This positioning of the second fan 6 accelerates humidity regulation within the storage cavity 3, preventing food from becoming moldy.

[0058] As an practicable approach, the first fan 5 and the second fan 6 are disposed on opposite sides of the same side wall of the storage device 2, with the second fan 6 positioned correspondingly to the first fan 5. When the storage chamber 3 is in a high-humidity environment, the first and second fans 5, 6 operate simultaneously, increasing the airflow velocity on opposite sides of the moisture-permeable membrane 4, further accelerating the water vapor transmission rate of the moisture-permeable membrane 4 and accelerating dehumidification.

[0059] In this embodiment, the area defined by the edge of the side wall of the storage device 2 where the moisture-permeable membrane 4 is located is denoted as S1, and the area of ​​the moisture-permeable membrane 4 is denoted as S2, where S2: S1∈[0.5, 0.8]. This allows the first fan 5, the second fan 6, and the moisture-permeable membrane 4 to be appropriately arranged on the side wall of the storage device 2 while ensuring that the area of ​​the moisture-permeable membrane 4 meets the requirements for humidity control.

[0060] In this embodiment, the plane where the air outlet of the first fan 5 or the second fan 6 is located is perpendicular to the plane where the moisture permeable membrane 4 is located; that is, the airflow flowing out of the air outlet of the first fan 5 or the second air outlet flows parallel to the moisture permeable membrane 4; so that the airflow flowing out of the air outlet of the first fan or the second fan can flow through more areas of the moisture permeable membrane 4, thereby improving the overall water vapor permeability of the moisture permeable membrane 4 and accelerating dehumidification.

[0061] In this embodiment, the moisture-permeable membrane 4 is configured in a rectangular shape; the longer side of the rectangular moisture-permeable membrane 4 is designated as the first side 12, and the shorter side of the rectangular moisture-permeable membrane 4 is designated as the second side 13. The first and second fans 5 and 6 are both positioned adjacent to the shorter second side 13 of the moisture-permeable membrane 4. This ensures that the air outlets of the first and second fans 5 and 6 effectively cover the moisture-permeable membrane 4 while also effectively utilizing the fluidity of the airflow, allowing it to flow fully through the first side 12 of the moisture-permeable membrane 4. Furthermore, the plane of the air outlet of the first and second fans 5 and 6 is parallel to the shorter side of the moisture-permeable membrane 4, effectively ensuring an effective amount of airflow through the moisture-permeable membrane 4 and improving airflow utilization.

[0062] The above-mentioned moisture-permeable membrane 4 is configured as a rectangle, with the length of its first side 12 being denoted as C and the length of its second side 13 being denoted as B, where C:B∈[1.2, 1.8]. At this point, the outlet airflow from the first fan 5 and / or the second fan 6 can effectively cover the moisture-permeable membrane 4 and ensure the airflow velocity through each area of ​​the moisture-permeable membrane 4, thereby ensuring that all areas of the moisture-permeable membrane 4 have an efficient water vapor transmission rate.

[0063] Along the second side 13 of the moisture permeable membrane 4, the size of the air outlet of the first fan 5 is recorded as W1, and the size of the air outlet of the second fan 6 is recorded as W2; W1: B∈[0.3, 0.7], W2: B∈[0.3, 0.7]; the above setting can reasonably arrange the moisture permeable membrane 4 and the fan by limiting the size of the fan and the size of the moisture permeable membrane 4, and ensure that the airflow flowing out of the air outlet of the first fan 5 and / or the second fan 6 has a comprehensive and effective coverage rate, thereby further improving the overall water vapor transmission rate of the moisture permeable membrane 4.

[0064] In addition, the normal line of the breathable membrane 4 passing through the center of the breathable membrane 4 is recorded as the axis L, the plane where the air outlet of the first fan or the second fan is located is recorded as the air outlet plane P, the distance between the axis L and the air outlet plane P is recorded as D1, and the distance between the edge (second edge 13) adjacent to the air outlet of the breathable membrane 4 and the first fan or the second fan and the air outlet plane P is recorded as D2, D2: D1∈[1, 1.5], so that the airflow flowing out of the air outlet plane maintains effective kinetic energy to flow through the first edge 12 of the breathable membrane 4, thereby increasing the water vapor permeability of the breathable membrane 4.

[0065] The center line of the moisture permeable membrane 4 parallel to the bottom surface of the storage room 1 is recorded as the center line M (in this embodiment, the center line of the rectangle parallel to the first side 12), and the areas of the moisture permeable membrane 4 located on opposite sides of the center line M are recorded as the first moisture permeable zone and the second moisture permeable zone respectively; wherein, one of the air outlet of the first fan 5 and the air outlet of the second fan 6 faces the first moisture permeable zone, and the other faces the second moisture permeable zone; the air flow blown out by the air outlet of the first fan 5 mainly flows through the moisture permeable zone it faces; the air flow blown out by the air outlet of the second fan 6 mainly flows through the moisture permeable zone it faces; the above arrangement makes the air flow intensity flowing through the entire area of ​​the moisture permeable membrane 4 uniformly distributed as a whole, fully utilizes the moisture permeable membrane 4, and improves the moisture permeation efficiency. In this embodiment, the first moisture permeable zone is located below the second moisture permeable zone, and the air outlet of the first fan 5 faces the first moisture permeable zone, and the air outlet of the second fan 6 faces the second moisture permeable zone.

[0066] In the above description, the first fan 5 and the second fan 6 are centrifugal fans or vortex fans. In this embodiment, a moisture-permeable membrane 4 is provided on the rear wall of the storage cavity 3. Furthermore, the moisture-permeable membrane 4 is mounted on a bracket 9, which is engaged with the storage device 2 and mounted at the communication opening. Specifically, two moisture-permeable membranes 4 are provided on the bracket 9, arranged side by side. As a configurable method, the two moisture-permeable membranes are spaced apart to effectively improve moisture permeation efficiency.

[0067] like Figures 9-12 As shown, a refrigeration unit is installed on the rear wall of storage room 1. The refrigeration unit and the rear wall of storage room 1 together define a return air duct 25. An evaporator (not shown) is installed in return air duct 25 to cool the air passing through it. The refrigeration unit defines a fan housing 21, in which a supply air blower 22 is installed.

[0068] The refrigeration unit defines a first air duct 23 and a second air duct 24 that connect the storage room in which it is located with the fan housing chamber 21. A first air supply port 26 near the upper end of the refrigeration unit, a second air supply port 27 near the lower end of the refrigeration unit, and a return air port 28 connected to the return air duct 25 are formed on the front side of the refrigeration unit. The second air supply port 27 corresponds to the moisture-permeable membrane 4 on the storage device 2, and the return air port 28 is located in the area below the second air supply port 27. The first air duct 23 connects the fan housing chamber 21 and the first air supply port 26, so that the low-temperature airflow that passes through the evaporator enters the storage room 1 from the top of the storage room. The low-temperature air sent out by the first air supply port 26 passes through the storage room 1, enters the return air duct 25 through the return air port 28 at the bottom, and enters the fan housing chamber 21 after being cooled by the evaporator.

[0069] Second air duct 24 connects fan housing chamber 21 and second air supply port 27. Low-temperature air entering storage room 1 through second air supply port 27 flows through moisture-permeable membrane 4 and returns to return air duct 25 through return port 28. After cooling in the evaporator, it enters fan housing chamber 21. This creates a localized low-temperature airflow circulation around moisture-permeable membrane 4, effectively affecting the moisture vapor transmission rate of the membrane 4 and promoting dehumidification. Furthermore, the temperature outside the membrane 4 is lowered, allowing the storage chamber to exchange heat with the membrane, thereby lowering the temperature inside the chamber and changing the storage temperature. Simultaneously, the localized low-temperature airflow circulation reduces its impact on the temperature inside the storage room. In the present invention, the temperature inside the storage chamber is regulated primarily by forming a localized airflow circulation through the refrigeration unit.

[0070] In this embodiment, a first damper 20 for connecting or disconnecting the fan accommodating chamber 21 and the storage room 1 is provided in the first air duct 23 , and a second damper 29 for connecting or disconnecting the fan accommodating chamber 21 and the storage room 1 is provided in the second air duct 24 .

[0071] When the temperature inside storage room 1 (outside storage chamber 3) changes, the water vapor pressure and chemical potential energy of the air outside of the moisture-permeable membrane 4 also change. The potential energy difference between the inside and outside of the moisture-permeable membrane 4 causes water to spontaneously transfer until the humidity inside storage chamber 3 reaches equilibrium with the humidity of the air outside of storage room 1. By adjusting the humidity inside storage chamber 3 in this manner, when the second humidity sensor inside storage chamber 3 detects that the actual humidity inside storage chamber 3 matches the set humidity threshold, the humidity adjustment process is completed and the second damper 29 closes. The temperature inside storage room 1 is maintained within a constant range, and the humidity inside storage chamber 3 also remains in a constant humidity equilibrium state.

[0072] The technical principle of moisture permeable membrane is to utilize the transfer-equilibrium process of water under different environmental chemical potentials.

[0073] The chemical potential difference is ΔM=M o -M i =R(T o lnp o -T i lnp i ), where P is water vapor pressure, T is temperature, and o and i are the corresponding parameters of the outer side of the moisture permeable membrane and the inner side of the storage cavity, respectively.

[0074] If ΔM>0, the transfer of water vapor from the outside of the moisture-permeable membrane to the storage cavity is a spontaneous process. In order to reach an equilibrium state, the humidity in the storage cavity 3 will increase until ΔM=0.

[0075] If ΔM=0, the water vapor outside the moisture-permeable membrane is in a dynamic equilibrium state, and the humidity in the storage cavity will neither increase nor decrease.

[0076] If ΔM<0, the transfer of water vapor in the storage cavity to the outside of the moisture permeable membrane is a spontaneous process. In order to reach an equilibrium state, the humidity in the storage cavity 3 will decrease until ΔM=0.

[0077] During specific use, the user selects an appropriate storage mode according to the food ingredients, and the second humidity sensor obtains the real-time humidity in the storage cavity 3. If the actual humidity in the storage cavity 3 is within the range threshold of the humidity corresponding to the set storage mode, no adjustment is made.

[0078] If the actual humidity in the storage chamber 3 is greater than the set storage mode humidity range threshold, dehumidification is required; the air supply fan 22 is started, and the second damper 29 is opened. The second air duct 24 connects the fan accommodating chamber 21 and the storage room 1. The low-temperature air enters the storage room 1 through the second air supply port 27 and flows through the moisture permeable membrane 4; then returns to the return air duct 25 through the return air port 28, and enters the fan accommodating chamber 21 after being cooled by the evaporator; thereby forming a local low-temperature air circulation around the moisture permeable membrane, so as to reduce the air temperature outside the moisture permeable membrane 4; at this time, To ↓, while T o ↓Then p o ↓, and according to ΔM=M o -M i =R(T o lnp o -T i lnp i ) analysis shows that M o If ΔM < 0, the water vapor in the storage cavity 3 will spontaneously migrate toward the outside of the moisture-permeable membrane 4 until ΔM = 0. This localized low-temperature airflow effectively promotes the rapid permeation of water vapor from the storage cavity 3 through the moisture-permeable membrane 4 into the storage room 1, and quickly removes the water vapor that escapes from the storage cavity 3, effectively accelerating the dehumidification rate and achieving rapid humidity control. Furthermore, through heat exchange, the temperature in the storage cavity is lowered, creating a cooler storage space suitable for storing fresh produce.

[0079] During the dehumidification process, the second humidity sensor again determines whether the actual humidity in the storage chamber is within the set storage mode humidity range. If so, the temperature and humidity control process is complete. If the temperature reaches the set storage mode temperature threshold, but the humidity remains above the set storage mode humidity threshold, the first fan (first fan and second fan) continues to operate and adjust the humidity until the second humidity sensor detects that the actual humidity in the storage chamber 3 is within the set storage mode humidity range threshold, thereby creating a constant temperature and humidity storage environment.

[0080] In this embodiment, the refrigerator is provided with two storage modes, specifically a constant humidity mode for fruits and vegetables and a constant humidity mode for fresh produce. The operation panel 11 allows the user to select a storage mode to specifically adjust the humidity within the storage chamber 3. In this embodiment, as previously described, the operation panel 11 is provided with a storage mode button, allowing the user to select the storage mode within the storage chamber 3 that is most suitable for preserving food according to the food ingredients; when the constant humidity mode for fresh produce is selected, the refrigeration unit is controlled to operate to adjust the temperature within the storage chamber 3 to the set storage temperature threshold T for the constant humidity mode for fresh produce. N0 (T N0 It should be noted that multiple storage modes can be set, and each storage mode is set with its own corresponding storage temperature threshold T N0 In this embodiment, the storage temperature threshold T N0 Less than the storage temperature threshold T of the fruit and vegetable constant temperature mode N0 Each storage mode has its own corresponding storage humidity threshold R Z0 . Above the storage humidity threshold R Z0When the humidity range is used as the threshold, a value greater than the maximum value of the range is considered to be above the humidity threshold, a value lower than the minimum value of the humidity range is considered to be below the humidity threshold, and a value within the range is considered to have reached the threshold. N0 The temperature range is used as the threshold (e.g., the storage temperature threshold T N0 ∈[-3℃, 0℃]), a value greater than the maximum value of the range is considered to be above the humidity threshold, a value lower than the minimum value of the humidity range is considered to be below the humidity threshold, and a value within the range is considered to have reached the threshold.

[0081] In this embodiment, the setting of the constant humidity mode for fruits and vegetables and the constant humidity mode for fresh produce is used as an example for explanation. In the set constant humidity mode for fresh produce, the second humidity sensor monitors the storage humidity R in the storage cavity 3. N , and promptly start the first fan to adjust the water vapor transmission rate of the moisture permeable membrane 4 by increasing the air flow speed on the surface of the moisture permeable membrane 4, thereby effectively adjusting the humidity in the storage chamber 3, and finally maintaining the humidity in the storage chamber 3 constant (the humidity is maintained within the set range). Above, the humidity in the storage chamber monitored by the second humidity sensor is recorded as storage humidity R N .

[0082] In the present invention, a plurality of cameras are provided in the storage cavity 3, and the plurality of cameras capture images of the storage cavity from different angles. In this embodiment, the controller is configured to obtain the storage temperature T in the storage cavity after the storage device enters the set fresh constant humidity mode. i , food space ratio γ, storage humidity R N , Storage humidity change rate α r ; Among them, the controller obtains the food space ratio γ, storage humidity change rate α rThis is prior art and will not be described in detail here. As an operative method, the controller may be configured to obtain the food space proportion γ as follows: the controller includes an acquisition module, a matching module, and a calculation module. The acquisition module is configured to acquire images of the storage cavity taken from different angles by multiple cameras, and pair them up to obtain multiple pairs of images; an extraction module is coupled to the acquisition module and configured to extract multiple feature points from each image; a matching module is coupled to the extraction module and configured to match each feature point of one image with all feature points of the other image in the same pair of images to obtain a matched feature point pair; and a calculation module is coupled to the matching module and configured to calculate the proportion of the item in the item space using the matched feature point pairs. The present invention provides multiple cameras and uses the cameras to capture images of the food in the storage cavity from different angles, thereby obtaining images of the item at different angles. Feature points are then matched based on the images at different angles to improve the accuracy of the measurement result, accurately locate the spatial position information of the food, and estimate the proportion of the food in the storage cavity based on the matched feature points, thereby obtaining a highly accurate measurement result. Furthermore, capturing images of the item at different angles avoids visual blind spots, making the final measurement result more accurate.

[0083] First, the controller controls the refrigeration unit to operate to adjust the temperature in the storage cavity 3 to the storage temperature threshold T set in the fresh food constant humidity mode. N0 .

[0084] At the same time, the humidity adjustment program of the fresh constant humidity mode is carried out; Figure 13 Specifically, when γ ≥ γ 0, the controller initiates the dehumidification process; γ 0 is the threshold for the food content. When the food content in the storage chamber exceeds the threshold, the large amount of food can significantly impact the humidity within the chamber, potentially causing rapid changes in humidity and disrupting the constant humidity state. The present invention provides a dehumidification process to promptly adjust the humidity to maintain a constant humidity in the chamber.

[0085] The dehumidification program includes:

[0086] In α r1 ≤α r <α r2 And R N ≥R Z1 When the controller controls the first fan to operate at the first power P1, the storage humidity in the storage chamber is R N Reaching the storage humidity threshold R Z0 ; Among them, α r1 is the first humidity change rate threshold, α r2 is the second humidity change rate threshold, R Z0 is the storage humidity threshold in the storage mode, R Z1is the first humidity threshold; R Z0 <R Z1 .

[0087] As an implementable approach, in α r2 ≤α r And R N ≥R Z2 When the controller controls the first fan to operate at the second power P2, the storage humidity in the storage chamber is R N Reaching the storage humidity threshold R Z0 ; Among them, R Z2 is the second humidity threshold; R Z1 <R Z2 As an practicable manner, the rated power of the first wind turbine is recorded as P0, P1<P0<P2; specifically, in this embodiment, P1=50%P0, P2=100%P0 or P2=120%P0.

[0088] Under different humidity change rates and real-time humidity conditions, the controller operates the first fan at different power levels. This allows for rapid humidity adjustment and reduces energy consumption by rationally controlling the fan's operating power. Furthermore, under these humidity conditions, the controller only controls the first fan, accelerating air flow on the side of the moisture-permeable membrane closest to the storage compartment (outside the storage cavity), reducing the humidity outside the sealed storage cavity (particularly the moisture-permeable membrane), and creating a larger humidity differential. This prevents the moisture-permeable membrane from decreasing in efficiency or failing completely, preventing moisture from escaping the storage cavity. This improves moisture permeability, thereby reducing the accumulation of condensation or frost within the storage cavity, preventing condensation from forming within the storage cavity and causing the food to mold. Furthermore, this prevents moisture loss from the food during the dehumidification process due to wind. Furthermore, it promotes airflow within the storage compartment, promoting uniform cooling within the compartment.

[0089] As another possible implementation method, Figure 14 As shown, in R N ≥R2, the second fan starts, and the first and second fans work at the same time; where R2 is the second dehumidification threshold, R2>R Z2 When the humidity in the storage chamber is high, the first and second fans operate simultaneously. The airflow from the second fan's outlet promotes air flow within the storage chamber to prevent condensation caused by excessive humidity. Furthermore, the airflow from the second fan passes through the moisture-permeable membrane, accelerating the membrane's water vapor transmission rate for rapid dehumidification, thus preventing condensation caused by excessive humidity. The first and second fans work together to regulate the humidity within the storage chamber and prevent food from spoiling.

[0090] In addition, in α r2 ≤α r And RN ≥R Z2 When the second humidity threshold R is preset Z2 = the second dehumidification threshold R2; as an alternative, Figure 15 As shown, a controller can be set to control the first fan and the second fan to work simultaneously until the storage humidity R in the storage chamber reaches N Reaching the storage humidity threshold R Z0 At this time, the first fan and the second fan cooperate to speed up the adjustment of the humidity in the storage cavity to prevent the food from getting moldy.

[0091] In this embodiment, the controller obtains the continuous closing time t of the storage device. After the continuous closing time of the storage device reaches the set time threshold t0, the controller controls the opening and stopping of the refrigeration unit according to the set storage mode (the default fruit and vegetable constant humidity mode set by the program, or the fresh constant humidity mode set by the user); when the fresh constant humidity mode is set (at the storage temperature T i Storage temperature threshold T N0 When the temperature in the storage cavity reaches R i Reaching the storage temperature threshold T N0 .

[0092] The above controller controls the first or second fan to run at a specific power according to the humidity change rate and storage humidity. It comprehensively considers the humidity change rate and real-time humidity to control the operation of the fan. On the one hand, it can quickly adjust the humidity in the storage chamber to maintain a constant humidity, effectively improving the preservation effect; on the other hand, it can specifically control the fan operating power to reduce energy consumption. In addition, the controller sets the storage temperature threshold T according to the storage mode. N0 Control the operation of the refrigeration unit and adjust the temperature in the storage cavity to quickly switch from storage mode to fresh food constant humidity mode.

[0093] like Figure 13 As shown, one or more constant humidity preservation control methods for refrigerators are as follows:

[0094] S1: Set the storage mode. The storage temperature threshold T corresponding to the set storage mode N0 Lower than the current storage temperature T i When the refrigeration unit (air supply fan and evaporator) starts, a local low-temperature airflow circulation is formed around the moisture permeable membrane 4, which affects the water vapor transmission rate of the moisture permeable membrane 4 and accelerates dehumidification. On the other hand, the temperature outside the moisture permeable membrane 4 is reduced, and the storage cavity exchanges heat with it, thereby reducing the temperature inside the storage cavity, so as to adjust the temperature inside the storage cavity 3 to reach the set storage temperature threshold T of the fresh food constant humidity mode. N0 .

[0095] S2: In the set storage mode, the second humidity sensor monitors the humidity value in the storage cavity 3 in real time to obtain the storage humidity change rate α in the storage cavity r , Storage humidity R N , multiple cameras take pictures of the storage cavity to obtain the food space ratio γ; the controller starts the dehumidification program according to the food space ratio γ; and according to the storage humidity change rate α r And storage humidity R N To control the first fan, the humidity in the storage chamber 3 is adjusted in a timely manner, thereby maintaining a constant humidity within the storage chamber 3. In the present invention, step S1 is performed first and then step S2 to quickly adjust the storage temperature and humidity. It should be understood that this sequence is not limited to the above, and steps S1 and S2 can be performed relatively independently to achieve simultaneous control of temperature and humidity regulation.

[0096] Specifically, in this embodiment, a food ratio threshold, two humidity change rate thresholds, and two humidity thresholds are set in each storage mode, specifically recorded as: food ratio threshold γ0, first humidity change rate threshold α r1 , the second humidity change rate threshold α r2 , the first humidity threshold R Z1 , the second humidity threshold R Z2 ; Among them, the first humidity change rate threshold α r1 <Second humidity change rate threshold α r2 ; Storage humidity threshold R Z0 <First humidity threshold R Z1 <Second humidity threshold R Z2 .

[0097] S21: During storage in the set storage mode, when γ≥γ0, the controller controls the dehumidification process. Specifically, the dehumidification process includes:

[0098] S22: During storage in the set storage mode, at the first humidity change rate threshold α r1 ≤Storage humidity change rate α r <Second humidity change rate threshold α r2 , and storage humidity R N ≥ the first humidity threshold R Z1 When the first fan is started, the first fan is operated at the first power P1 until the storage humidity R in the storage chamber 3 reaches N Reaching the storage humidity threshold R Z0 , the first fan stops working.

[0099] As an implementable manner, the rated power of the first wind turbine is recorded as P0, and P1=50% of P0.

[0100] S23: During storage in the set storage mode, at the second humidity change rate threshold α r2 ≤Storage humidity change rate α r , and storage humidity R N ≥ the second humidity threshold R Z2 When the first fan is started, the first fan is operated at the second power P2 until the storage humidity R in the storage chamber 3 reaches N Reaching the storage humidity threshold R Z0 , the first fan stops working. As an practicable approach, P2=100%P0 or P2=120%P0 to quickly complete humidity adjustment.

[0101] like Figure 14 As shown, as another practicable method, the first dehumidification threshold R1 is preset to be less than the first humidity threshold R Z1 <Second humidity threshold R Z2 <Second dehumidification threshold R2; In the dehumidification procedure, after step S23, step S3 is added; specifically, step S3 is: at the storage humidity R N When the humidity in the storage chamber 3 reaches the storage humidity threshold R2 (the humidity threshold for controlling the start of the second fan), the second fan is started, and the first fan and the second fan work simultaneously to dehumidify at a high speed and quickly adjust the humidity in the storage chamber 3 to the storage humidity threshold R in the storage mode. Z0 Among them, the second dehumidification threshold R2 ≥ the second humidity threshold R Z2 ;

[0102] like Figure 15 As shown, as another practicable method, the second humidity threshold R is preset. Z2 = second dehumidification threshold R2; an alternative solution to step S23 is: at the second humidity change rate threshold α r2 ≤Storage humidity change rate α r , and storage humidity R N ≥ the second humidity threshold R Z2 When the first fan and the second fan are set to work simultaneously, the storage humidity in the storage chamber is R N Reaching the storage humidity threshold R Z0 When this operation is performed, step S3 is no longer set.

[0103] In the present invention, the storage temperature threshold T corresponding to the set storage mode is N0 Lower than the current storage temperature T iWhen the temperature in the storage cavity is adjusted, the refrigeration unit promptly adjusts the temperature in the storage cavity, quickly adjusts the temperature in the storage cavity, realizes the switching of the storage mode, and effectively controls the temperature in the storage cavity to be in a constant state; at the same time, the humidity is adjusted. When the above set fresh constant humidity storage mode is reached, the humidity is adjusted mainly by running the first fan to adjust the humidity. It controls the first fan or the second fan to run at a specific power according to the humidity change rate and the storage humidity, and comprehensively considers the two factors of humidity change rate and real-time humidity to control the operation of the fan. On the one hand, it can quickly adjust the humidity in the storage cavity to maintain a constant humidity in the storage cavity, effectively improving the preservation effect; on the other hand, it controls the fan operating power in a targeted manner to reduce energy consumption. The setting of the present invention can effectively control the storage cavity in a constant temperature and humidity state, improve the preservation effect, and prevent the food from drying out or mildewing. In addition, the present invention starts the dehumidification program when the food space ratio reaches the set value, which can effectively control the influence of the food on the humidity in a targeted manner to maintain the constant humidity state of the storage cavity.

[0104] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. Refrigerator, characterized in that It includes: a box body defining a storage room; a storage device housed in the storage room; The storage device defines a sealed storage cavity, and a communication port is formed on a side wall of the storage device; a second humidity sensor for detecting humidity therein, a temperature sensor for detecting temperature therein, and a plurality of cameras for capturing images of the storage cavity from different angles are provided in the storage cavity; a moisture-permeable membrane disposed at the communication port of the storage device; a first fan disposed on a side wall of the storage device having the moisture-permeable membrane and located on a side of the side wall close to the storage compartment; an air outlet of the first fan facing the moisture-permeable membrane, and air flowing out of the air outlet of the first fan flowing along a surface of the moisture-permeable membrane; A refrigeration unit having a second air outlet corresponding to the position of the moisture permeable membrane; a low-temperature air flow formed by the refrigeration unit enters the storage room through the second air outlet and flows through the moisture permeable membrane; The controller is configured to obtain the storage temperature T in the storage cavity after the storage device enters the storage mode. i , food space ratio γ, storage humidity R N , Storage humidity change rate α r ; In T i >T N0 When the temperature in the storage cavity reaches the storage temperature threshold T of the storage mode, the controller controls the refrigeration unit to work. N0 ; When γ≥γ0, the controller controls the process to enter the dehumidification program; the dehumidification program includes: In α r1 ≤α r <α r2 And R N ≥R Z1 When the controller controls the first fan to operate at the first power P1, the storage humidity in the storage cavity is R N Reaching the storage humidity threshold R Z0 ; Among them, γ0 is the threshold of food proportion, α r1 is the first humidity change rate threshold, α r2 is the second humidity change rate threshold, R Z0 is the storage humidity threshold in the storage mode, R Z1 is the first humidity threshold; R Z0 <R Z1 .

2. The refrigerator according to claim 1, wherein: The dehumidification program includes: r2 ≤α r And R N ≥R Z2 When the first fan is operated at the second power P2, the controller controls the first fan to operate until the storage humidity R N Reaching the storage humidity threshold R Z0 ; Among them, R Z2 is the second humidity threshold; R Z1 <R Z2 , P2>P1.

3. The refrigerator according to claim 2, wherein: The rated power of the first fan is denoted as P0, where P1<P0<P2.

4. The refrigerator according to claim 3, wherein: P1=50%P0, P2=100%P0 or P2=120%P0.

5. The refrigerator according to any one of claims 1 to 4, characterized in that: A second fan is provided in the storage chamber; the dehumidification process includes: In R N ≥R2, the second fan starts, and the first fan and the second fan work at the same time; wherein R2 is the second dehumidification threshold, R2>R Z2 .

6. The refrigerator according to claim 1, wherein: The storage chamber is provided with a second fan; the dehumidification process includes: r2 ≤α r And R N ≥R Z2 When the first fan and the second fan work simultaneously, the storage humidity in the storage cavity is R N Reaching the storage humidity threshold R Z0 .

7. The refrigerator according to any one of claims 1 to 4, characterized in that: The controller obtains the storage device continuous closing time t, and after the storage device continuous closing time reaches the set time threshold t0, at the storage temperature T i Storage temperature threshold T N0 When the temperature of the refrigeration unit is lowered to R i Reaching the storage temperature threshold T N0 .

8. The refrigerator according to any one of claims 1 to 4, characterized in that: The storage device is provided with an operation panel, and the operation panel is used to select a storage mode; Among them, the operation panel is set with a fruit and vegetable constant temperature mode button and a fresh constant humidity mode button; each set storage mode is set with its own corresponding storage temperature threshold T N0 and storage humidity threshold R Z0 ; Storage temperature threshold T for fresh food constant humidity mode N0 Less than the storage temperature threshold T of the constant temperature mode for fruits and vegetables N0 .

9. The refrigerator according to claim 8, characterized in that: Storage humidity threshold R Z0 Set as humidity range; the intersection of humidity ranges corresponding to different humidity thresholds is an empty set; the storage temperature threshold R N0 Set as temperature range; the intersection of temperature ranges corresponding to different temperature thresholds is an empty set.

10. The refrigerator according to claim 8, wherein: The second fan is arranged on the side wall of the storage device having the moisture permeable membrane and is adjacent to the moisture permeable membrane; the air outlet of the second fan faces the moisture permeable membrane, and the air flow flowing out of the air outlet of the second fan flows along the surface of the moisture permeable membrane.

Images