Fresh-keeping drawer, refrigerator and control method of fresh-keeping drawer

Abstract

The invention relates to a fresh-keeping drawer, a refrigerator and a control method of the refrigerator, and the fresh-keeping drawer comprises a drawer assembly provided with a containing space; the first air door is arranged on the drawer assembly, and the first air door is used for communicating the containing space with the external environment; the first detection assembly is used for detecting initial parameters of the food, and the initial parameters comprise at least one of the volume, the initial mass and the type; the second detection assembly is arranged in the containing space, the second detection assembly is used for detecting environmental parameters of the containing space, and the environmental parameters comprise at least one of the pressure intensity and the carbon dioxide concentration of the containing space; the controller is electrically connected with the first air door, the controller is configured to calculate theoretical ventilation time based on at least part of the initial parameters of the food and the environmental parameters, the first air door is controlled to be in an open state or a closed state according to the theoretical ventilation time, carbon dioxide poisoning of fruits and vegetables can be prevented, and the storage period of the fruits and vegetables is prolonged.

Description

Technical Field

[0001] The present application relates to the field of refrigeration storage technology, and in particular to a fresh-keeping drawer, a refrigerator and a control method thereof. Background Art

[0002] With the progress of society, the consumption level of users is constantly improving, and users have higher and higher requirements for the preservation of food. Fruits and vegetables will still respire after being harvested, consuming their own nutrients to maintain normal physiological metabolism. The higher the respiration intensity, the shorter the storage period.

[0003] In the related art, in order to improve the freshness of food ingredients, the method of extending the shelf life of fruits and vegetables by reducing pressure storage has been used for fruit and vegetable preservation. However, since the continuous respiration of fruits and vegetables will cause carbon dioxide accumulation, leading to carbon dioxide poisoning of fruits and vegetables, the preservation effect is not ideal. Summary of the invention

[0004] The present application provides a fresh-keeping drawer, a refrigerator and a control method thereof, so as to solve the technical problem that the existing decompression storage method causes carbon dioxide accumulation due to the continuous respiration of fruits and vegetables, resulting in carbon dioxide poisoning of fruits and vegetables and unsatisfactory fresh-keeping effect.

[0005] In a first aspect, the present application provides a fresh-keeping drawer, comprising:

[0006] A drawer assembly is provided with a containing space, wherein the containing space is used for storing food;

[0007] A first air door, disposed on the drawer assembly, the first air door being used to connect the accommodating space with the external environment;

[0008] A first detection component, the first detection component is used to detect an initial parameter of the food, the initial parameter including at least one of volume, initial mass and type;

[0009] a second detection component, disposed in the accommodating space, and used to detect an environmental parameter of the accommodating space, wherein the environmental parameter includes at least one of a pressure and a carbon dioxide concentration of the accommodating space;

[0010] A controller is electrically connected to the first damper, and the controller is configured to calculate a theoretical ventilation time based on initial parameters of the food and at least part of the environmental parameters, and control the first damper to be in an open state or a closed state according to the theoretical ventilation time.

[0011] In a possible implementation, the drawer assembly includes a partition, which divides the accommodating space into a gas-making chamber and a storage chamber; the fresh-keeping drawer includes a decompression humidification device and a second air door, and the second air door is arranged on the partition; the decompression humidification device is installed on the drawer assembly and is connected to the gas-making chamber, and the decompression humidification device is used to provide low-pressure gas with saturated humidity to the gas-making chamber.

[0012] In a possible implementation, the decompression humidification device includes a decompression part, which is connected to the gas making chamber, and the decompression part is used to drive the gas in the gas making chamber to flow into the decompression part. The controller is electrically connected to the decompression part, and the controller is configured to control the decompression part to be in an open state if the first pressure of the storage compartment is greater than the preset pressure of the storage compartment.

[0013] In a possible implementation, the pressure reducing part includes an exhaust pipe, a vacuum pump and an exhaust pipe, and a third damper is provided on the gas making chamber; one end of the exhaust pipe is connected to the vacuum pump, and one end of the exhaust pipe is connected to the gas making chamber through the third damper; one end of the exhaust pipe is connected to the vacuum pump, and the other end of the exhaust pipe is connected to the external environment.

[0014] In a possible implementation, the pressure-reducing humidification device includes a humidifying unit, which is connected to the air-making chamber and is used to provide water mist to the air-making chamber. The controller is electrically connected to the humidifying unit, and the controller is configured to control the humidifying unit to be in an open state if the humidity of the air-making chamber is less than a preset humidity of the air-making chamber.

[0015] In a possible implementation, the humidification unit includes an atomizing mechanism, a water mist channel, a water inlet pipe and an air inlet pipe, one end of the water mist channel is connected to the air making chamber, and one end of the water mist channel is connected to the air outlet of the atomizing mechanism; the air inlet of the atomizing mechanism is connected to the water inlet pipe, and the water inlet of the atomizing mechanism is connected to the water inlet pipe.

[0016] In a possible implementation, the drawer assembly includes a pressure relief valve and a pressure relief button, the pressure relief valve is disposed in the storage compartment, and the pressure relief valve and the pressure relief button are electrically connected to control the first pressure of the storage compartment to return to the atmospheric pressure of the external environment.

[0017] In a possible implementation, the drawer assembly includes a water outlet hole, which is communicated with the accommodating space to discharge condensation generated in the accommodating space.

[0018] In a second aspect, the present application provides a refrigerator comprising the fresh-keeping drawer as described above.

[0019] In a third aspect, the present application provides a refrigerator control method, comprising:

[0020] Acquire initial parameters of the food and environmental parameters of the accommodation space, wherein the initial parameters include at least one of the weight, volume and type of the food, and the environmental parameters include at least one of the pressure and carbon dioxide concentration of the accommodation space;

[0021] The theoretical ventilation time is calculated based on the initial parameters of the food and at least part of the environmental parameters, and the first damper is controlled to be in an open state or a closed state according to the theoretical ventilation time.

[0022] In a possible implementation, the drawer assembly of the refrigerator includes a partition, the partition divides the accommodating space into an air-making compartment and a storage compartment, the fresh-keeping drawer of the refrigerator includes a decompression humidification device and a second air door, the second air door is arranged on the partition, the decompression humidification device is installed on the drawer assembly and is connected to the air-making compartment, and the control method includes:

[0023] obtaining a first pressure of the storage compartment;

[0024] If the first pressure of the storage compartment is greater than the preset pressure of the storage compartment;

[0025] The decompression humidification device and the second damper are controlled to be in an open state so that the first pressure of the storage compartment reaches a preset pressure of the storage compartment.

[0026] In a possible implementation, the decompression and humidification device includes a decompression unit, the decompression unit is communicated with the air making chamber, and the control method includes:

[0027] Acquiring a second pressure of the gas-making chamber;

[0028] Calculating a target pressure of the gas-making chamber based on the first pressure of the storage chamber, the volume of the accommodating space, and the volume of the gas-making chamber;

[0029] The decompression part is controlled to be in an open state so that the pressure of the gas-making chamber reaches the target pressure of the gas-making chamber.

[0030] In a possible implementation, the decompression and humidification device includes a humidifying unit, the humidifying unit is communicated with the gas making chamber, and the control method includes:

[0031] Obtaining the humidity of the gas-making chamber;

[0032] If the humidity of the air-making chamber is lower than the preset humidity of the air-making chamber, the humidifying unit is controlled to be in an open state.

[0033] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0034] The fresh-keeping drawer, refrigerator and control method thereof provided by the embodiment of the present application, during the food storage period, the first damper is in a closed state, at which time the accommodating space is isolated from the external environment, and the accommodating space is in a closed and low-pressure state, which is conducive to delaying the ripening and aging of fruits and vegetables and preventing them from rotting and deteriorating. Since fruits and vegetables still breathe during the reduced-pressure storage period, the theoretical ventilation time is calculated by multi-dimensional parameters such as fruit and vegetable variety, weight, volume, weight loss rate and carbon dioxide tolerance concentration. When the storage time of fruits and vegetables reaches the theoretical ventilation time, the first damper is controlled to be in an open state, at which time the accommodating space is connected to the external environment, and the carbon dioxide, ethylene and other gases accumulated in the accommodating space can be released to the external environment, thereby preventing carbon dioxide poisoning of fruits and vegetables, extending the storage period of fruits and vegetables, and improving the preservation effect of fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0038] Figure 1 A schematic diagram of the exploded structure of a fresh-keeping drawer provided in an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of a refrigerator provided in an embodiment of the present application;

[0040] Figure 3 for Figure 1 A top view of the crisper drawer is shown, wherein the drawer bucket is placed in the drawer shell;

[0041] Figure 4 For along Figure 3 Cross-sectional view in the BB direction;

[0042] Figure 5 For along Figure 3Sectional view in the AA direction;

[0043] Figure 6 for Figure 1 A top view of the drawer shown;

[0044] Figure 7 A flowchart of a refrigerator control method provided by an embodiment of the present application;

[0045] Figure 8 It is a schematic diagram of the static period;

[0046] Fig. 9 This is a graph showing the weight loss rate of some fruits and vegetables;

[0047] Fig.10 This is a graph showing changes in carbon dioxide.

[0048] Description of reference numerals:

[0049] 100. Fresh-keeping drawer;

[0050] 1. Drawer assembly; 11. Drawer shell; 111. Partition; 112. Second water outlet; 113. Third water outlet; 12. Drawer bucket; 121. First water outlet; 13. Accommodation space; 131. Storage compartment; 132. Gas making compartment; 14. Pressure relief valve; 15. Pressure relief button; 2. First damper; 3. First detection assembly; 31. Infrared camera; 32. Electronic scale; 4. Second detection assembly; 41. Carbon dioxide concentration detector; 42. First pressure sensor; 43. Second pressure sensor; 44. Humidity sensor; 5. Decompression humidification device; 51. Decompression unit; 511. Air outlet pipe; 512. Air extraction pipe; 513. Vacuum pump; 52. Humidification unit; 521. Atomization mechanism; 522. Water mist channel; 523. Water inlet pipe; 524. Air inlet pipe; 6. Second damper; 7. Third damper;

[0051] 200. Refrigerator. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0053] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0054] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0055] The following first explains the professional terms or technical terms involved in this application:

[0056] Static period: The time from closing the drawer to ventilating the food in the storage space is called a static period. The time from closing the drawer to the first ventilation is called the first static period, and the time from the first ventilation to the second ventilation is called the second static period... and so on. There can be n static periods during the storage of food.

[0057] Starting point of the static period: The moment when the first pressure of the storage compartment drops to the preset pressure of the storage compartment after the first storage or each ventilation is the starting point of the static period.

[0058] End of the resting period: The moment when the lowest tolerable concentration of carbon dioxide for fruits and vegetables is reached and ventilation is required is the end of the resting period.

[0059] In the relevant technology, reduced pressure storage is a way to extend the shelf life of fruits and vegetables. Reduced pressure storage refers to a fruit and vegetable storage system that places fruits and vegetables in a specific closed container and introduces air below atmospheric pressure. It mainly reduces the respiration intensity of fruits and vegetables, inhibits ethylene synthesis, and delays the maturation and aging of fruits and vegetables by reducing air pressure and oxygen partial pressure. It can also inhibit the growth of microorganisms and prevent fruits and vegetables from rotting and deteriorating. However, during the storage process, the continuous respiration of fruits and vegetables will cause the accumulation of gases such as carbon dioxide and ethylene, leading to carbon dioxide poisoning of fruits and vegetables, affecting the preservation effect of food ingredients.

[0060] In order to solve the technical problem that the existing fruits and vegetables are stored in a closed environment under reduced pressure, which is prone to carbon dioxide accumulation and leads to fruit and vegetable poisoning, the present application provides a fresh-keeping drawer, a refrigerator and a control method thereof, wherein the theoretical ventilation time is calculated by multi-dimensional parameters such as fruit and vegetable variety, weight, volume, weight loss rate and carbon dioxide tolerance concentration. When the storage time of fruits and vegetables reaches the theoretical ventilation time, the first damper is controlled to be in an open state, and gases such as carbon dioxide and ethylene accumulated in the accommodating space can be released into the external environment, thereby preventing carbon dioxide poisoning of fruits and vegetables, extending the storage period of fruits and vegetables, and improving the preservation effect of fruits and vegetables.

[0061] like Figure 1 and Figure 2 As shown, in some exemplary embodiments, a fresh-keeping drawer 100 provided by the present application is installed in a refrigerator 200. The refrigerator 200 may have a refrigerator compartment, a freezer compartment, etc., and the fresh-keeping drawer 100 may be placed in the refrigerator compartment and the freezer compartment to store food. The fresh-keeping drawer 100 in the refrigerator compartment can provide a fresh-keeping function for food, delaying its aging and corruption, and the food may be, for example, fruits and vegetables.

[0062] In this embodiment, if Figure 1 As shown, the fresh-keeping drawer 100 includes a drawer assembly 1, a first damper 2, a first detection assembly 3, a second detection assembly 4 and a controller. The drawer assembly 1 is provided with a storage space 13, and the storage space 13 is used to store food. Among them, the drawer assembly 1 may include a drawer shell 11 and a drawer 12, and the drawer 12 is used to store food for storage. The opening of the drawer 12 can be set on the upper side of the drawer 12 to place food. The storage space 13 is formed in the drawer shell 11, and the opening of the storage space 13 is located at the side of the drawer shell 11, so as to facilitate pushing and pulling the drawer 12. When the drawer 12 is placed in the drawer shell 11, a closed storage space 13 can be formed.

[0063] It should be noted that the above-mentioned drawer 12 may also be provided with some auxiliary components to facilitate pushing, pulling or installing the drawer 12. For example, a handle is provided on the front side of the drawer 12 to provide a force application position for the user to facilitate pushing and pulling the drawer 12. Alternatively, an auxiliary component such as a roller is provided on the lower side of the drawer 12 to reduce resistance and improve smoothness. The drawer housing 11 may also be provided with a track that cooperates with the roller to limit the roller to ensure that the drawer 12 can move along a preset direction, which is subject to actual conditions.

[0064] The drawer assembly 1 may be provided with a decompression device, which evacuates the accommodating space 13 to reduce the pressure and oxygen concentration of the accommodating space 13, thereby reducing the respiration intensity of fruits and vegetables, inhibiting ethylene synthesis, and delaying the ripening and aging of fruits and vegetables; it may also inhibit the growth of microorganisms and prevent fruits and vegetables from rotting and deteriorating.

[0065] The first detection component 3 is used to detect the initial parameters of the food, which include at least one of volume, initial mass and type. Figure 2 As shown, a plurality of infrared cameras 31 may be provided on the top and around the refrigerator 200 to detect the volume and type of food. The working principle of the infrared camera 31 to detect the volume and type of food through image processing can be referred to the prior art, and the present application will not elaborate on it here. For example, the infrared camera 31 can detect that the food belongs to apples, strawberries, oranges, pears, etc., and record the corresponding type and volume of the food. An electronic scale 32 may be provided in front of the fresh-keeping drawer 100 to weigh the weight of the food. It should be noted that each time the user puts in or takes out food, the food must be placed on the electronic scale 32 for recording.

[0066] The second detection component 4 is disposed in the accommodating space 13, and is used to detect environmental parameters of the accommodating space 13, and the environmental parameters include at least one of the pressure and the carbon dioxide concentration of the accommodating space 13. A pressure sensor may be disposed in the accommodating space 13 to detect the pressure of the accommodating space 13 in real time.

[0067] like Figure 4As shown, in this embodiment, a carbon dioxide concentration detector 41 can be used to detect the carbon dioxide concentration in the accommodating space 13. The traditional carbon dioxide concentration detector 41 generally adopts a pump suction method for testing. This method will continuously use a pump to suck the gas in the accommodating space 13 for detection, which will destroy the low-pressure environment in the accommodating space 13. The carbon dioxide concentration detector 41 in this application works before each ventilation and does not work at other times. A protective door is provided in front of the carbon dioxide concentration detector 41. When the carbon dioxide concentration detector 41 is working, the protective door is opened to contact the air in the accommodating space 13; when the carbon dioxide concentration detector 41 is not working, the protective door is closed to isolate the air in the accommodating space 13 and extend the service life of the carbon dioxide concentration detector 41.

[0068] like Figure 1 As shown, the first damper 2 is arranged on the drawer assembly 1, and the first damper 2 is used to connect the accommodating space 13 and the external environment; the controller is electrically connected to the first damper 2, and the controller is configured to calculate the theoretical ventilation time based on the initial parameters of the food and at least part of the environmental parameters, and control the first damper 2 to be in an open state or a closed state according to the theoretical ventilation time.

[0069] It is understandable that during food storage, the first damper 2 is in a closed state, at which time the accommodating space 13 is isolated from the external environment, and the accommodating space 13 is in a closed and low-pressure state, which is conducive to delaying the maturation and aging of fruits and vegetables and preventing them from rotting and deteriorating. Since fruits and vegetables will still breathe during the reduced-pressure storage period, the theoretical ventilation time is calculated by multi-dimensional parameters such as fruit and vegetable variety, weight, volume, weight loss rate, and carbon dioxide tolerance concentration. When the storage time of fruits and vegetables reaches the theoretical ventilation time, the first damper 2 is controlled to be in an open state, at which time the accommodating space 13 is connected to the external environment, and the carbon dioxide, ethylene and other gases accumulated in the accommodating space 13 can be released to the external environment, thereby preventing carbon dioxide poisoning of fruits and vegetables, extending the storage period of fruits and vegetables, and improving the preservation effect of fruits and vegetables.

[0070] In some embodiments, Figure 1 , Figure 3-Figure 5As shown, the drawer assembly 1 includes a partition 111, which divides the accommodating space 13 into an air-making chamber 132 and a storage chamber 131. The partition 111 can be arranged on the drawer shell 11, and the drawer 12 and the partition 111 are arranged to form the storage chamber 131. The partition 111 and the drawer shell 11 can be integrally formed, and the partition 111 can also be fixedly installed on the drawer shell 11 by components such as buckles and bolts. The fresh-keeping drawer 100 includes a decompression humidification device 5 and a second damper 6, and the second damper 6 is arranged on the partition 111. When the second damper 6 is in an open state, the storage chamber 131 and the air-making chamber 132 can be connected. The decompression humidification device 5 is installed on the drawer assembly 1 and is connected to the air-making chamber 132. The decompression humidification device 5 is used to provide low-pressure gas with saturated humidity to the air-making chamber 132. By providing the decompression humidification device 5, low-pressure gas with saturated humidity can be prepared. The low-pressure gas with saturated humidity is introduced into the storage compartment 131. On the one hand, it can delay and reduce the respiration intensity of fruits and vegetables, inhibit ethylene synthesis, delay the maturation and aging of fruits and vegetables, and inhibit the growth of microorganisms to prevent fruits and vegetables from rotting and deteriorating. On the other hand, the low-pressure gas with saturated humidity can increase the humidity of the accommodating space 13, reduce water loss of fruits and vegetables, and prevent fruits and vegetables from shrunken due to water loss.

[0071] In this embodiment, if Figure 3 As shown, the decompression humidification device 5 includes a decompression part 51, which is connected to the gas making chamber 132, and the decompression part 51 is used to drive the gas in the gas making chamber 132 to flow into the decompression part 51. The controller is electrically connected to the decompression part 51, and the controller is configured to control the decompression part 51 to be in an open state if the first pressure of the storage chamber 131 is greater than the preset pressure of the storage chamber 131.

[0072] like Figure 4 As shown, the second detection assembly 4 may include a first pressure sensor 42, and the first pressure sensor 42 is disposed in the storage compartment 131 to detect the first pressure P of the storage compartment 131 in real time. 1 The preset pressure is generally set to be lower than the atmospheric pressure. For example, the preset pressure can be set to a pressure corresponding to 10-50 mmHg. The preset pressure can be set to 10 mmHg, 20 mmHg, 30 mmHg, 40 mmHg, etc. If the first pressure P of the storage compartment 131 1 Greater than the preset pressure P of the storage compartment 131 0 , the pressure reducing part 51 is controlled to be in an open state, the gas in the gas making chamber 132 is driven to flow into the pressure reducing part 51, and then the second damper 6 is controlled to be opened, the storage chamber 131 and the gas making chamber 132 are connected, so that the first pressure of the storage chamber 131 reaches the preset pressure of the storage chamber 131, thereby delaying and reducing the respiration intensity of fruits and vegetables, inhibiting ethylene synthesis, delaying the maturation and aging of fruits and vegetables, and inhibiting the growth of microorganisms to prevent fruits and vegetables from rotting and deteriorating.

[0073] Furthermore, if Figure 5 As shown, the second detection assembly 4 may include a second pressure sensor 43, and the second pressure sensor 43 is disposed in the gas-making chamber 132 to detect the second pressure P of the gas-making chamber 132 in real time. 2 Based on the first pressure of the storage compartment 131, the volume of the accommodating space 13 and the volume of the gas-making compartment 132, the target pressure P of the gas-making compartment 132 is calculated. m2 Then, the pressure reducing unit 51 is controlled to be in an open state so that the second pressure of the gas-making chamber 132 reaches the target pressure of the gas-making chamber 132. Next, the second damper 6 is controlled to be in an open state so that the gas in the gas-making chamber 132 and the storage chamber 131 are mixed, and the first pressure of the storage chamber 131 reaches the preset pressure of the storage chamber 131.

[0074] The target pressure P of the gas chamber 132 m2 The calculation process is as follows:

[0075] 1) According to the total molar number n of the mixed gas in the accommodating space 13 0 Equal to the sum of the moles of gas in the gas production room 132 and the storage room 131:

[0076] n 0 =n 1 +n 2 =(P 1 L 1 +P 2 L 2 ) / RT;

[0077] Among them, n 1 is the number of moles of gas in the fresh-keeping chamber, n 2 is the number of moles of gas in the gas making chamber 132, P 1 is the first pressure of the storage compartment 131, P 2 is the second pressure of the gas making chamber 132, L 1 is the volume of the storage compartment 131, L 2 is the volume of the gas making chamber 132, R is the ideal gas constant, and T is the thermodynamic temperature of the ideal gas.

[0078] 2) According to the ideal gas law PV = nRT, we can get:

[0079]

[0080] 3) Combining Formula 1 and Formula 2, the target pressure of the gas-making chamber 132 can be derived:

[0081]

[0082] For example, Figure 3 As shown, the decompression unit 51 includes an exhaust pipe 512, a vacuum pump 513 and an outlet pipe 511, and a third damper 7 is provided on the air-making chamber 132; one end of the exhaust pipe 512 is connected to the vacuum pump 513, and one end of the exhaust pipe 512 is connected to the air-making chamber 132 through the third damper 7; one end of the outlet pipe 511 is connected to the vacuum pump 513, and the other end of the outlet pipe 511 is connected to the external environment. Among them, the third damper 7 is electrically connected to the controller, and the vacuum pump 513 is electrically connected to the controller. If the first pressure of the storage chamber 131 is greater than the preset pressure of the storage chamber 131, the vacuum pump 513 and the third damper 7 are controlled to be in an open state, and the vacuum pump 513 drives the air in the air-making chamber 132 to be discharged to the external environment through the exhaust pipe 512 and the outlet pipe 511, thereby reducing the second pressure of the air-making chamber 132, so that the second pressure of the air-making chamber 132 reaches the target pressure of the air-making chamber 132.

[0083] In some embodiments, Figure 3 As shown, the decompression humidification device 5 includes a humidification unit 52, which is connected to the air-making chamber 132. The humidification unit 52 is used to provide water mist to the air-making chamber 132. The controller is electrically connected to the humidification unit 52. The controller is configured to, if the humidity of the air-making chamber 132 is less than the preset humidity H of the air-making chamber 132 0 , the humidifying unit 52 is controlled to be in an open state.

[0084] like Figure 5 As shown, the second detection component 4 may include a humidity sensor 44, which is disposed in the air-making room 132 to detect the humidity of the air-making room 132 in real time. If the humidity of the air-making room 132 is less than the preset humidity of the air-making room 132, the humidifying unit 52 is controlled to be in an open state to provide water mist to the air-making room 132, and the air-making room 132 is filled with low-pressure gas with saturated humidity. Then, the second damper 6 is controlled to be in an open state to mix the gas in the storage room 131 and the gas-making room 132, and the first pressure of the storage room 131 is reduced to the preset pressure of the storage room 131, and the humidity of the storage room 131 reaches a near saturated humidity. The preset humidity H 0 Generally, it is set to 95% to 100%, for example, H 0 Can be set to 95%, 96%, 97%, 98%, 99% etc.

[0085] After the first pressure of the storage compartment 131 is reduced to a preset pressure of the storage compartment 131 , the decompression part 51 may be controlled to be in a closed state.

[0086] For example, Figure 3As shown, the humidifying unit 52 includes an atomizing mechanism 521, a water mist channel 522, a water inlet pipe 523 and an air inlet pipe 524, one end of the water mist channel 522 is connected to the air making chamber 132, and one end of the water mist channel 522 is connected to the air outlet of the atomizing mechanism 521; the air inlet of the atomizing mechanism 521 is connected to the water inlet pipe 523, and the water inlet of the atomizing mechanism 521 is connected to the water inlet pipe 523.

[0087] The atomizing mechanism 521 can adopt an existing ultrasonic atomizer, and the atomizing mechanism 521 is electrically connected to the controller. When the humidity of the air-making chamber 132 is lower than the preset humidity of the air-making chamber 132, the atomizing mechanism 521 is controlled to work, and air enters the atomizing mechanism 521 from the air inlet pipe 524 to form compressed air. At the same time, water enters the atomizing mechanism 521 from the water inlet pipe 523, and then the compressed air impacts the water into small particles of water mist. The small particles of water mist enter the air-making chamber 132 from the water mist channel 522 and the water mist inlet to form a low-pressure gas with saturated humidity. The low-pressure gas with saturated humidity enters the storage chamber 131 through the second air door 6 until the humidity of the storage chamber 131 is increased to close to the saturated humidity.

[0088] In some embodiments, Figure 1 As shown, the drawer assembly 1 includes a pressure relief valve 14 and a pressure relief button 15. The pressure relief valve 14 is disposed in the storage compartment 131. The pressure relief valve 14 and the pressure relief button 15 are electrically connected to control the first pressure of the storage compartment 131 to be restored to the atmospheric pressure of the external environment. Specifically, the pressure relief valve 14 and the pressure relief button 15 can be installed on the upper side of the drawer housing 11 for user operation. When the user needs to take food, the user can press the pressure relief button 15, the pressure relief valve 14 opens, the storage compartment 131 is connected to the external environment, and the first pressure of the storage compartment 131 is restored to the atmospheric pressure of the external environment. At this time, the user can easily open the drawer and take food.

[0089] Since the humidity in the accommodation space 13 is saturated, if there is a temperature difference, condensation will be generated, which is easy to breed microorganisms. Therefore, the embodiment of the present application is also designed with a water outlet hole, which is connected to the accommodation space 13 to discharge the condensation generated in the accommodation space 13. The specific structural design is described as follows.

[0090] In this embodiment, if Figure 1 As shown, the drawer 12 is provided with a first water outlet 121 which is communicated with the storage compartment 131. Optionally, a plurality of first water outlets 121 may be provided, such as Figure 6 As shown, a plurality of first water outlet holes 121 are arranged at intervals. Figure 4 As shown, the drawer housing 11 is provided with a second water outlet 112 connected to the first water outlet 121, and the second water outlet 112 is provided with a first valve, which controls the opening of the first valve to discharge the condensation generated in the storage compartment 131. Figure 5As shown, the drawer housing 11 is provided with a third water outlet 113 communicating with the gas-making chamber 132 , and the third water outlet 113 is provided with a second valve, which is controlled to open so as to discharge condensation generated in the gas-making chamber 132 .

[0091] like Figure 2 As shown, the embodiment of the present application further provides a refrigerator 200, comprising the fresh-keeping drawer 100 as described above.

[0092] The refrigerator 200 may have a refrigerator, a freezer, etc., and the fresh-keeping drawer 100 may be placed in the refrigerator and the freezer to store food. For example, the fresh-keeping drawer 100 may be placed in the refrigerator, and then the first damper 2 is opened to connect the storage compartment and the refrigerator. During food storage, the first damper 2 is in a closed state, and the storage space 13 is isolated from the refrigerator, and the storage space 13 is in a closed and low-pressure state, which is conducive to delaying the ripening and aging of fruits and vegetables and preventing fruits and vegetables from rotting and deteriorating. The theoretical ventilation time is calculated by multi-dimensional parameters such as fruit and vegetable variety, weight, volume, weight loss rate, and carbon dioxide tolerance concentration. When the storage time of fruits and vegetables reaches the theoretical ventilation time, the first damper 2 is controlled to be in an open state, and the storage space 13 is connected to the refrigerator, and the carbon dioxide, ethylene and other gases accumulated in the storage space 13 can be released into the refrigerator, thereby preventing carbon dioxide poisoning of fruits and vegetables, extending the storage period of fruits and vegetables, and improving the preservation effect of fruits and vegetables.

[0093] like Figure 7 As shown, the embodiment of the present application further provides a control method of a refrigerator 200, which is applied to the refrigerator 200 as described above, and includes the following steps:

[0094] S1. Obtaining initial parameters of the food and environmental parameters of the accommodating space 13, wherein the initial parameters include at least one of the weight, volume and type of the food, and the environmental parameters include at least one of the pressure and carbon dioxide concentration of the accommodating space 13.

[0095] A plurality of infrared cameras 31 may be provided on the top and around the refrigerator 200 to detect the volume and type of food. The working principle of the infrared camera 31 to detect the volume and type of food through image processing can be referred to the prior art, and the present application will not elaborate on it here. For example, the infrared camera 31 can detect that the food belongs to apples, strawberries, oranges, pears, etc., and record the corresponding type and volume of the food. An electronic scale 32 may be provided in front of the fresh-keeping drawer 100 to weigh the weight of the food. It should be noted that each time the user puts in or takes out food, the food must be placed on the electronic scale 32 for recording.

[0096] S2. Calculate the theoretical ventilation time based on the initial parameters of the food and at least part of the environmental parameters, and control the first damper 2 to be in an open state or a closed state according to the theoretical ventilation time. When the storage time of the fruits and vegetables reaches the theoretical ventilation time, the first damper 2 is controlled to be in an open state, and the accommodating space 13 is connected to the external environment. The carbon dioxide, ethylene and other gases accumulated in the accommodating space 13 can be released to the external environment, thereby preventing carbon dioxide poisoning of the fruits and vegetables, extending the storage period of the fruits and vegetables, and improving the preservation effect of the fruits and vegetables.

[0097] In some embodiments, the control method further comprises the following steps:

[0098] Obtaining a first pressure of the storage compartment 131;

[0099] If the first pressure of the storage compartment 131 is greater than the preset pressure of the storage compartment 131;

[0100] The decompression humidification device 5 and the second damper 6 are controlled to be in an open state so that the first pressure of the storage compartment 131 reaches a preset pressure of the storage compartment 131 .

[0101] By preparing low-pressure gas with saturated humidity and passing the low-pressure gas with saturated humidity into the storage chamber 131, on the one hand, it can delay and reduce the respiration intensity of fruits and vegetables, inhibit ethylene synthesis, delay the maturation and aging of fruits and vegetables, and inhibit the growth of microorganisms to prevent fruits and vegetables from rotting and deteriorating. On the other hand, the low-pressure gas with saturated humidity can increase the humidity of the accommodating space 13, reduce water loss of fruits and vegetables, and prevent fruits and vegetables from shrunken due to water loss.

[0102] In some embodiments, the control method further comprises the following steps:

[0103] Obtaining a second pressure of the gas making chamber 132;

[0104] Based on the first pressure of the storage compartment 131, the volume of the storage compartment 131 and the volume of the gas-making compartment 132, the target pressure of the gas-making compartment 132 is calculated. The target pressure of the gas-making compartment 132 can refer to the aforementioned embodiment of the fresh-keeping drawer 100, which will not be described in detail here.

[0105] The pressure reducing unit 51 is controlled to be in an open state so that the pressure of the gas-making chamber 132 reaches the target pressure of the gas-making chamber 132. After the pressure of the gas-making chamber 132 reaches the target pressure of the gas-making chamber 132, the second damper 6 can be controlled to be opened so that the gas in the gas-making chamber 132 and the storage chamber 131 are mixed, and the first pressure of the storage chamber 131 reaches the preset pressure of the storage chamber 131.

[0106] In some embodiments, the control method further comprises the following steps:

[0107] Obtaining the humidity of the air-making chamber 132;

[0108] If the humidity of the air-making chamber 132 is lower than the preset humidity of the air-making chamber 132 , the humidifying unit 52 is controlled to be in an open state.

[0109] The above control method embodiments can be freely combined to obtain more embodiments, for example:

[0110] In an example of a control method, the following steps are included:

[0111] A1. Obtaining a first pressure of the storage chamber 131 and a second pressure of the gas-making chamber 132;

[0112] A2. If the first pressure of the storage compartment 131 is greater than the preset pressure of the storage compartment 131, the target pressure of the gas-making compartment 132 is calculated, and the pressure-reducing part 51 is controlled to be in an open state;

[0113] A3. Obtaining the humidity of the air-making chamber 132;

[0114] A4. If the humidity of the air-making chamber 132 is lower than the preset humidity of the air-making chamber 132, the humidifying unit 52 is controlled to be in an open state;

[0115] A5. Calculate the ventilation time.

[0116] A51. Calculate the total volume of fruits and vegetables in the drawer based on the total volume Vn' of each type of fruit and vegetable. The total volume Va of n types of fruits and vegetables is: Va=V1'+V2'+...+Vn'.

[0117] For example: the user stores three kinds of fruits, namely apples, oranges and pears. The volumes of the three apples are V1, V2 and V3 respectively, and the total volume of apples V1'=V1+V2+V3; the volumes of the two oranges are V1 and V2 respectively, and the total volume of oranges V2'=V1+V2; the volumes of the two pears are V1 and V2 respectively, and the total volume of pears V3'=V1+V2.

[0118] A52. Calculate the air percentage in the storage room 131.

[0119] For the sake of ease of explanation and understanding, this application introduces the concept of a static period, such as Figure 8 As shown, there can be multiple resting periods during the storage of fruits and vegetables.

[0120] When the storage room 131 reaches the starting point of the static period, the atmospheric pressure is about 101.325KPa, and the air ratio in the storage room 131 is: A 0 =P 0 / 101.325*100.

[0121] When the storage compartment 131 reaches the end of the static period, the air ratio in the storage compartment 131 is: Az = Pz / 101.325*100. It should be noted that due to the respiration of fruits and vegetables during storage, the first pressure of the storage compartment 131 will continue to increase as the storage time of fruits and vegetables increases. Pz is the pressure of the storage compartment 131 when it reaches the end of ventilation, and the pressure can be a preset value.

[0122] A53. Calculate the total volume of air in the storage room 131.

[0123] When the storage compartment 131 reaches the starting point of the static period, the total air volume V of the storage compartment 131 is b =(L 1 -Va)×A 0 , where L 1 It is the volume of the storage compartment 131.

[0124] When the storage room 131 reaches the end of the static period, the total volume of air in the storage room 131 Vz = (L 1 -Va)×A 1 .

[0125] A54. According to the ideal gas law, PV=nRT, m=nM, and m=MPV / RT.

[0126] Calculated during the first static period (ref. Figure 7 ), the mass of carbon dioxide in the storage compartment 131 at the start and end of the rest period, respectively.

[0127] Default carbon dioxide content in storage room 131 B 0 Consistent with the environment, B 0 =0.03%~0.04%, when the storage compartment 131 reaches the starting point of the static period, the volume of carbon dioxide corresponding to the storage compartment 131 is: V 起 =V b ×B 0 , the starting mass of carbon dioxide is:

[0128]

[0129] Among them, T 0 is the temperature of the storage compartment 131.

[0130] The carbon dioxide concentration tolerance concentration N of fruits and vegetables is determined based on the different types of fruits and vegetables in the drawer. When the carbon dioxide concentration in the environment is higher than the tolerance value, the fruits and vegetables will be at risk of carbon dioxide poisoning. Therefore, the carbon dioxide endpoint mass is the amount of carbon dioxide corresponding to the minimum carbon dioxide concentration tolerance value of fruits and vegetables in the storage compartment 131. If this value is exceeded, the fruits and vegetables will undergo anaerobic respiration. When multiple fruits and vegetables are mixed, the lowest value is taken for calculation. For example, if there are apples, oranges and pears in the drawer, and the carbon dioxide concentration tolerance concentrations are N1 (5% to 8%) for apples, N2 (3% to 5%) for oranges and N3 (20% to 25%) for cherries, then N = N2 (3% to 5%) is taken for calculation, and N can be 3%, that is, when the storage compartment 131 reaches the end of the static period, the carbon dioxide volume corresponding to the storage compartment 131 is: V 终 =Vz×N, the final mass of carbon dioxide is:

[0131]

[0132] The tolerance concentration of dioxygen for some fruits and vegetables is shown in Table 1 below:

[0133] Table 1. Tolerance of dioxygen concentrations of some fruits and vegetables.

[0134]

[0135] For the nth rest period, n≥2, the carbon dioxide mass of the storage compartment 131 at the start and end of the rest period, respectively.

[0136] By default, the carbon dioxide content in the storage room 131 is the tolerance concentration N of the oxygen concentration of fruits and vegetables during each ventilation, and the carbon dioxide content in the gas-making room 132 is about 0.03%. After the previous ventilation, the carbon dioxide content in the storage room 131 is The volume of carbon dioxide in the nth static period is V 起 '=V b ×B 0 ', the starting mass of carbon dioxide in the nth static period is:

[0137]

[0138] The end point mass of carbon dioxide at the nth rest period is:

[0139]

[0140] A55. Calculate the cumulative amount of carbon dioxide G allowed in the storage room 131 during a static period.

[0141] G=m 起 -m 终 .

[0142] A56. Calculate the cumulative amount of carbon dioxide E allowed in the storage room 131 during a static period.

[0143] Since the weight loss rate of different fruits and vegetables increases with storage time, the respiration intensity is corrected according to the weight loss rate of different fruits and vegetables. Fig. 9 As shown, the controller stores a weight loss database of various fruits and vegetables, and can match the weight loss rate of the corresponding fruits and vegetables according to the type and storage time of each fruit and vegetable.

[0144] According to the type of fruits and vegetables and the temperature of the storage room 131, the respiratory intensity Sn (mg CO 2 / kg·h), and the sum of the mass of each fruit and vegetable m′ n And the weight loss rate w, calculate the growth rate E of carbon dioxide in the storage compartment 131 per unit time:

[0145] E=(m' a ×(1-w a )×S a +m' b ×(1-w b )×S b +……+m' n ×(1-w n )×S n )

[0146] The total mass of each fruit and vegetable is m′ n The calculation of Vn' can refer to the above Vn' calculation method. Note that the same kind of fruits and vegetables are stored at different times, and the system defines them as two varieties, represented by two letters to distinguish the weight loss rate and respiration intensity (the weight loss rate and respiration intensity of fresh fruits and vegetables are lower).

[0147] The following lists the respiration intensities of some common fruits and vegetables (storage temperature 2℃~8℃, storage time 1 day to 5 days). The system has a repeatedly verified fruit and vegetable database, which automatically matches each fruit and vegetable according to its type and storage time.

[0148] Table 2 Respiration intensity of some fruits and vegetables

[0149]

[0150] A57. Calculate the theoretical ventilation time t: t = G / E.

[0151] When the storage time does not reach the theoretical ventilation time, the first damper is controlled to be in a closed state; when the storage time reaches the theoretical ventilation time, the first damper is controlled to be in an open state, at which time the storage compartment 131 is connected to the external environment, and the carbon dioxide, ethylene and other gases accumulated in the storage compartment 131 can be released to the external environment, thereby preventing carbon dioxide poisoning of fruits and vegetables, extending the storage period of fruits and vegetables, and improving the preservation effect of fruits and vegetables.

[0152] In another example, step A57 further includes:

[0153] A58. Correct the theoretical ventilation time.

[0154] After obtaining the theoretical ventilation time, the protective door of the carbon dioxide concentration detector is opened, and the carbon dioxide concentration detector detects the carbon dioxide concentration c in the storage compartment 131. The theoretical ventilation time is corrected according to the carbon dioxide concentration in the storage compartment 131 to obtain the actual ventilation time t': t'=G / E*λ.

[0155] Table 3. Correction coefficients

[0156] program Numeric Correction coefficient λ 1 c<0.5N 1.8<λ≤2.0 2 0.5N≤c<1N 1.5<λ≤1.8 3 1N≤c<1.2N λ=1 3 1.2N≤c<1.5N 0.8≤λ<1 4 1.5N≤c<2N 0.6≤λ<0.8 5 c≥2N 0.5≤λ<0.6

[0157] Furthermore, when the storage time does not reach the theoretical ventilation time, the first damper is controlled to be in a closed state; when the storage time reaches the actual ventilation time, the first damper is controlled to be in an open state, at which time the storage chamber 131 is connected to the external environment, and the carbon dioxide, ethylene and other gases accumulated in the storage chamber 131 can be released to the external environment, thereby preventing carbon dioxide poisoning of fruits and vegetables, extending the storage period of fruits and vegetables, and improving the preservation effect of fruits and vegetables. By calculating the ventilation time, the carbon dioxide change curve can be simulated, such as Fig.10 shown.

[0158] When the actual ventilation time is reached, the system repeats steps A1-A4 to ventilate the storage compartment 131. Then, step A5 is repeated to calculate the ventilation time, and the cycle continues.

[0159] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0160] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0161] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A fresh-keeping drawer, characterized in that: include: A drawer assembly is provided with a containing space, wherein the containing space is used for storing food; A first air door, disposed on the drawer assembly, the first air door being used to connect the accommodating space with the external environment; A first detection component, the first detection component is used to detect an initial parameter of the food, the initial parameter including at least one of volume, initial mass and type; a second detection component, disposed in the accommodating space, and used to detect an environmental parameter of the accommodating space, wherein the environmental parameter includes at least one of a pressure and a carbon dioxide concentration of the accommodating space; A controller is electrically connected to the first damper, and the controller is configured to calculate a theoretical ventilation time based on initial parameters of the food and at least part of the environmental parameters, and control the first damper to be in an open state or a closed state according to the theoretical ventilation time.

2. The fresh-keeping drawer according to claim 1, characterized in that: The drawer assembly includes a partition, which divides the accommodating space into a gas-making chamber and a storage chamber; the fresh-keeping drawer includes a decompression humidification device and a second air door, and the second air door is arranged on the partition; the decompression humidification device is installed on the drawer assembly and is connected to the gas-making chamber, and the decompression humidification device is used to provide low-pressure gas with saturated humidity to the gas-making chamber.

3. The fresh-keeping drawer according to claim 2, characterized in that: The decompression humidification device includes a decompression part, which is communicated with the gas making chamber, and is used to drive the gas in the gas making chamber to flow into the decompression part. The controller is electrically connected to the decompression part, and the controller is configured to control the decompression part to be in an open state if the first pressure of the storage compartment is greater than the preset pressure of the storage compartment.

4. The fresh-keeping drawer according to claim 3, characterized in that: The decompression part includes an exhaust pipe, a vacuum pump and an exhaust pipe, and a third damper is provided on the gas making chamber; one end of the exhaust pipe is connected to the vacuum pump, and one end of the exhaust pipe is connected to the gas making chamber through the third damper; one end of the exhaust pipe is connected to the vacuum pump, and the other end of the exhaust pipe is connected to the external environment.

5. The fresh-keeping drawer according to claim 2, characterized in that: The decompression humidification device includes a humidifying unit, which is communicated with the air-making chamber and is used to provide water mist to the air-making chamber. The controller is electrically connected to the humidifying unit, and the controller is configured to control the humidifying unit to be in an open state if the humidity of the air-making chamber is less than a preset humidity of the air-making chamber.

6. The fresh-keeping drawer according to claim 5, characterized in that: The humidifying part includes an atomizing mechanism, a water mist channel, a water inlet pipe and an air inlet pipe, one end of the water mist channel is connected to the air making chamber, and one end of the water mist channel is connected to the air outlet of the atomizing mechanism; the air inlet of the atomizing mechanism is connected to the water inlet pipe, and the water inlet of the atomizing mechanism is connected to the water inlet pipe.

7. The fresh-keeping drawer according to claim 2, characterized in that: The drawer assembly includes a pressure relief valve and a pressure relief button. The pressure relief valve is arranged in the storage compartment. The pressure relief valve and the pressure relief button are electrically connected to control the first pressure of the storage compartment to return to the atmospheric pressure of the external environment.

8. The fresh-keeping drawer according to claim 1, characterized in that: The drawer assembly includes a water outlet hole, which is communicated with the accommodating space to discharge condensation generated in the accommodating space.

9. A refrigerator, characterized in that: It comprises a fresh-keeping drawer as described in any one of claims 1 to 8.

10. A refrigerator control method, applied to the refrigerator as claimed in claim 9, characterized in that: include: Acquire initial parameters of the food and environmental parameters of the accommodation space, wherein the initial parameters include at least one of the weight, volume and type of the food, and the environmental parameters include at least one of the pressure and carbon dioxide concentration of the accommodation space; The theoretical ventilation time is calculated based on the initial parameters of the food and at least part of the environmental parameters, and the first damper is controlled to be in an open state or a closed state according to the theoretical ventilation time.

11. The control method according to claim 10, characterized in that: The drawer assembly of the refrigerator includes a partition, the partition divides the accommodating space into an air-making chamber and a storage chamber, the fresh-keeping drawer of the refrigerator includes a decompression humidification device and a second air door, the second air door is arranged on the partition, the decompression humidification device is installed on the drawer assembly and communicated with the air-making chamber, and the control method includes: obtaining a first pressure of the storage compartment; If the first pressure of the storage compartment is greater than the preset pressure of the storage compartment; The decompression humidification device and the second damper are controlled to be in an open state so that the first pressure of the storage compartment reaches a preset pressure of the storage compartment.

12. The control method according to claim 11, characterized in that: The decompression and humidification device includes a decompression part, the decompression part is communicated with the air making chamber, and the control method includes: Acquiring a second pressure of the gas-making chamber; Calculating a target pressure of the gas-making chamber based on the first pressure of the storage chamber, the volume of the accommodating space, and the volume of the gas-making chamber; The decompression part is controlled to be in an open state so that the pressure of the gas-making chamber reaches the target pressure of the gas-making chamber.

13. The control method according to claim 11, characterized in that: The decompression and humidification device includes a humidification unit, the humidification unit is communicated with the gas-making chamber, and the control method includes: Obtaining the humidity of the gas-making chamber; If the humidity of the air-making chamber is lower than the preset humidity of the air-making chamber, the humidifying unit is controlled to be in an open state.

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