Fresh-keeping drawer and control method, device, equipment and medium of fresh-keeping drawer

Abstract

The embodiment of the invention provides a fresh-keeping drawer and a control method, device, equipment and medium of the fresh-keeping drawer. The fresh-keeping drawer comprises a drawer main body 1, the cavity 3 is used for accommodating the drawer main body 1; the carbon dioxide controlled atmosphere assembly 4 is arranged at the top of the cavity 3 and at least comprises a carbon dioxide separation membrane 41; the electromagnetic valve 5 is arranged on the outer surface of the cavity 3 and is connected with the interior of the cavity 3 through an electromagnetic valve air inlet pipe 71; the vacuum pump 6 is arranged on the outer surface of the cavity 3 and connected with the air outlet end of the electromagnetic valve 5 through a vacuum pump air inlet pipe 72. According to the fresh-keeping drawer provided by the invention, the concentration of carbon dioxide in the fresh-keeping drawer is controlled by utilizing the carbon dioxide separation film, the electromagnetic valve and the vacuum pump, so that the fresh-keeping period of food is prolonged; the fresh-keeping effect of the fresh-keeping drawer is improved, and double improvement of environmental protection and economic benefits is achieved.

Description

Technical Field

[0001] The present invention relates to the field of fresh-keeping technology, and in particular to a fresh-keeping drawer and a control method, device, equipment and medium for the fresh-keeping drawer. Background Art

[0002] Carbon dioxide, which contains about 0.031% of the air, is an important gas used to protect food in modified atmosphere packaging technology. It has a strong inhibitory effect on molds and enzymes, and is "toxic" to aerobic bacteria. Increasing the concentration of carbon dioxide (1% to 12%) can inactivate the respiration of fruits and vegetables, inhibit the oxidation process, reduce the loss of food nutrients, and delay the aging process of fruits and vegetables. Therefore, reducing the oxygen concentration and increasing the carbon dioxide concentration in the food storage environment is conducive to protecting food quality and extending the shelf life of food.

[0003] In the related art, a controlled atmosphere film is generally provided on the fresh-keeping room to separate the controlled atmosphere fresh-keeping space from the outside of the fresh-keeping room. The controlled atmosphere film allows nitrogen in the air to pass through and blocks at least a portion of the oxygen in the air; the suction device is used to extract the air in the controlled atmosphere fresh-keeping space to the outside of the fresh-keeping room. Thus, a nitrogen-rich and oxygen-poor gas atmosphere is formed in the fresh-keeping space, which prolongs the fresh-keeping time of the food.

[0004] However, due to the size of nitrogen and oxygen molecules, the existing nitrogen-oxygen separation membrane materials have a rate of oxygen passing through them that is greater than that of nitrogen, that is, theoretically, the gas-controlled membrane does not exist; and the ultimate goal of the relevant technical solution can only achieve a reduction in the oxygen concentration in the fresh-keeping space, but cannot achieve an increase in the carbon dioxide concentration. Summary of the invention

[0005] In view of the above problems, a fresh-keeping drawer and a control method, device, equipment, and medium for the fresh-keeping drawer are proposed to overcome the above problems or at least partially solve the above problems, including:

[0006] A fresh-keeping drawer, comprising:

[0007] Drawer body 1;

[0008] A cavity 3, wherein the cavity 3 is used to accommodate the drawer body 1;

[0009] A carbon dioxide gas-conditioning component 4, wherein the carbon dioxide gas-conditioning component 4 is disposed on the top of the cavity 3 and the carbon dioxide gas-conditioning component 4 at least comprises a carbon dioxide separation membrane 41;

[0010] A solenoid valve 5, wherein the solenoid valve 5 is disposed on the outer surface of the cavity 3 and the solenoid valve 5 is connected to the interior of the cavity 3 through a solenoid valve air inlet pipe 71;

[0011] The vacuum pump 6 is disposed on the outer surface of the cavity 3 and is connected to the air outlet of the solenoid valve 5 via a vacuum pump air inlet pipe 72 .

[0012] Optionally, the cavity 3 comprises:

[0013] A controlled atmosphere membrane mounting hole 31, wherein the controlled atmosphere membrane mounting hole 31 is disposed at the top of the cavity 3 and is connected to the carbon dioxide separation membrane 41;

[0014] An exhaust hole 32, wherein an air inlet end of the exhaust hole 32 is connected to the interior of the cavity 3 and an air outlet end of the exhaust hole 32 is connected to an air inlet end of the solenoid valve air inlet pipe 71;

[0015] The support plate mounting seat 33 is arranged on the inner surface of the cavity 3 .

[0016] Optionally, the carbon dioxide gas conditioning component 4 further includes:

[0017] A separation membrane installation grid 42, wherein the separation membrane installation grid 42 is attached to and connected to the top of the carbon dioxide separation membrane 41;

[0018] A sealing gasket 43, wherein the sealing gasket 43 is arranged on the inner surface of the cavity 3;

[0019] A support plate 46, wherein the support plate 46 is connected to the cavity 3 through the support plate mounting seat 33;

[0020] A spring 45, wherein the spring 45 is disposed between the support plate 46 and the sealing gasket 43 and the spring 45 is connected to the support plate 46;

[0021] The sealing plate 44 is disposed between the supporting plate 46 and the sealing gasket 43 and is connected to an end of the spring 45 away from the supporting plate 46 .

[0022] Optionally, the fresh-keeping drawer further includes:

[0023] An annular sealing ring 2 is provided at the junction of the drawer body 1 and the cavity 3 .

[0024] Optionally, the fresh-keeping drawer further includes:

[0025] The carbon dioxide concentration sensor 8 is arranged on the inner surface of the cavity 3 .

[0026] Optionally, the carbon dioxide separation membrane 41 is any one of a cellulose acetate membrane, a polyphenylene ether membrane, a polyphenylene oxide modified membrane, a diamine-containing polycarbonate composite membrane, and an ethyl cellulose membrane.

[0027] A control method for a fresh-keeping drawer, the fresh-keeping drawer comprising a drawer body 1; a cavity 3, the cavity 3 being used to accommodate the drawer body 1; a carbon dioxide gas-conditioning component 4, the carbon dioxide gas-conditioning component 4 being arranged at the top of the cavity 3 and the carbon dioxide gas-conditioning component 4 at least comprising a carbon dioxide separation membrane 41; a solenoid valve 5, the solenoid valve 5 being arranged on the outer surface of the cavity 3 and the solenoid valve 5 being connected to the interior of the cavity 3 through a solenoid valve air inlet pipe 71; a vacuum pump 6, the vacuum pump 6 being arranged on the outer surface of the cavity 3 and the vacuum pump 6 being connected to the air outlet end of the solenoid valve 5 through a vacuum pump air inlet pipe 72; the method comprising:

[0028] In response to the closing operation of the drawer body 1, obtaining carbon dioxide concentration information in the cavity 3, and determining whether the carbon dioxide concentration is less than a first preset threshold;

[0029] If the carbon dioxide concentration is less than the first preset threshold, the solenoid valve 5 and the vacuum pump 6 are turned on, and it is determined whether the carbon dioxide concentration is greater than or equal to a second preset threshold; wherein the second preset threshold is greater than the first preset threshold;

[0030] If the carbon dioxide concentration is greater than or equal to the second preset threshold, the solenoid valve 5 and the vacuum pump 6 are closed.

[0031] Optionally, the method further includes:

[0032] Determine whether the carbon dioxide concentration is greater than or equal to a third preset threshold value, and if the carbon dioxide concentration is greater than or equal to the third preset threshold value, open the solenoid valve 5 and determine whether the carbon dioxide concentration is less than or equal to the second preset threshold value; wherein the third preset threshold value is greater than the second preset threshold value;

[0033] If the carbon dioxide concentration is less than or equal to the second preset threshold, the solenoid valve 5 is closed.

[0034] Optionally, the method further includes:

[0035] Determine whether the carbon dioxide concentration is less than or equal to the first preset threshold value. If the carbon dioxide concentration is less than or equal to the first preset threshold value, execute the step of opening the solenoid valve 5 and the vacuum pump 6 again, and determine whether the carbon dioxide concentration is greater than or equal to the second preset threshold value.

[0036] A control device for a fresh-keeping drawer, the fresh-keeping drawer comprising a drawer body 1; a cavity 3, the cavity 3 being used to accommodate the drawer body 1; a carbon dioxide gas-conditioning component 4, the carbon dioxide gas-conditioning component 4 being arranged at the top of the cavity 3 and the carbon dioxide gas-conditioning component 4 at least comprising a carbon dioxide separation membrane 41; a solenoid valve 5, the solenoid valve 5 being arranged on the outer surface of the cavity 3 and the solenoid valve 5 being connected to the interior of the cavity 3 via a solenoid valve air inlet pipe 71; a vacuum pump 6, the vacuum pump 6 being arranged on the outer surface of the cavity 3 and the vacuum pump 6 being connected to the air outlet end of the solenoid valve 5 via a vacuum pump air inlet pipe 72; the device comprising:

[0037] a first carbon dioxide concentration determination module, configured to obtain carbon dioxide concentration information in the cavity 3 in response to a closing operation of the drawer body 1, and determine whether the carbon dioxide concentration is less than a first preset threshold;

[0038] The solenoid valve and vacuum pump opening module is used to open the solenoid valve 5 and the vacuum pump 6 if the carbon dioxide concentration is less than the first preset threshold, and to determine whether the carbon dioxide concentration is greater than or equal to a second preset threshold; wherein the second preset threshold is greater than the first preset threshold;

[0039] The solenoid valve and vacuum pump closing module is used to close the solenoid valve 5 and the vacuum pump 6 if the carbon dioxide concentration is greater than or equal to the second preset threshold.

[0040] An electronic device comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the computer program implements the control method of the fresh-keeping drawer as described above when executed by the processor.

[0041] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method of the fresh-keeping drawer as described above is implemented.

[0042] A computer program product comprises a computer program, wherein when the computer program is executed by a processor, the control method of the fresh-keeping drawer as described above is implemented.

[0043] A household appliance comprises the fresh-keeping drawer as described above.

[0044] The embodiments of the present invention have the following advantages:

[0045] The present invention provides a fresh-keeping drawer, comprising a drawer body 1; a cavity 3 for accommodating the drawer body 1; a carbon dioxide gas-adjusting component 4, which is arranged on the top of the cavity 3 and includes at least a carbon dioxide separation membrane 41; a solenoid valve 5, which is arranged on the outer surface of the cavity 3 and connected to the inside of the cavity 3 through a solenoid valve air inlet pipe 71; and a vacuum pump 6, which is arranged on the outer surface of the cavity 3 and connected to the outlet end of the solenoid valve 5 through a vacuum pump air inlet pipe 72. The fresh-keeping drawer provided by the present invention realizes the control of the carbon dioxide concentration inside the fresh-keeping drawer by using the carbon dioxide separation membrane, the solenoid valve and the vacuum pump, thereby extending the fresh-keeping period of food; improving the fresh-keeping effect of the fresh-keeping drawer, and achieving a dual improvement in environmental protection and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0047] Figure 1 is a schematic diagram of the overall structure of a fresh-keeping drawer provided by some embodiments of the present invention;

[0048] Figure 2 is an exploded view of a fresh-keeping drawer provided in some embodiments of the present invention;

[0049] Figure 3 is a cross-sectional view of a fresh-keeping drawer provided by some embodiments of the present invention;

[0050] Figure 4 is a flowchart of steps of a method for controlling a fresh-keeping drawer provided by some embodiments of the present invention;

[0051] Figure 5 is an overall execution flow chart of a control method for a fresh-keeping drawer provided by some embodiments of the present invention;

[0052] Figure 6 It is a structural schematic diagram of a control device for a fresh-keeping drawer provided in some embodiments of the present invention. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with basically the same functions and effects. This is only for the purpose of clearly describing the technical solutions of the embodiments of the present application, and shall not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0055] In the embodiments of the present application, the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] Carbon dioxide, which contains about 0.031% of carbon dioxide in the air, is an important gas used to protect food in modified atmosphere packaging technology. It has a strong inhibitory effect on molds and enzymes, and is "toxic" to aerobic bacteria. Increasing the concentration of carbon dioxide (1% to 12%) can passivate the respiration of fruits and vegetables, inhibit the oxidation process, reduce the loss of food nutrients, and delay the aging process of fruits and vegetables. Therefore, reducing the oxygen concentration and increasing the carbon dioxide concentration in the food storage environment is conducive to protecting food quality and extending the shelf life of food. However, when the carbon dioxide concentration exceeds the standard (>10%) and causes the oxygen concentration to be extremely low (<3%), fruits and vegetables may produce anaerobic respiration of fermentation, which will cause plant cells to be "poisoned" and spoiled. In addition, carbon dioxide plays a role in preserving meat, but high concentrations (>10%) will cause adverse phenomena such as discoloration and taste change. Moreover, the respiration of fruits and vegetables during storage consumes oxygen and produces carbon dioxide. Therefore, it is necessary to monitor and adjust the oxygen and carbon dioxide concentrations in the fresh-keeping space in real time to keep them at the appropriate fresh-keeping concentration.

[0057] In the related art, a controlled atmosphere membrane is generally provided on the fresh-keeping room to separate the controlled atmosphere fresh-keeping space from the outside of the fresh-keeping room. The controlled atmosphere membrane allows nitrogen in the air to pass through and can block at least part of the oxygen in the air; the suction device is used to exhaust the air in the controlled atmosphere fresh-keeping space to the outside of the fresh-keeping room. Thus, a nitrogen-rich and oxygen-poor gas atmosphere is formed in the fresh-keeping space, which prolongs the fresh-keeping time of the food. Due to the molecular size of nitrogen and oxygen, the existing nitrogen-oxygen separation membrane materials have a rate of oxygen passing greater than nitrogen, that is, theoretically, the controlled atmosphere membrane does not exist. Secondly, the ultimate goal of the related technical solution can only achieve a reduction in the oxygen concentration in the fresh-keeping space, and cannot achieve an increase in the carbon dioxide concentration. Moreover, when the vacuum pump stops pumping and the internal pressure returns to normal, a high gas concentration difference will be generated on both sides of the separation membrane, resulting in the failure of the fresh-keeping gas to pass through the membrane. In addition, the fruit and vegetable fresh-keeping space often needs to maintain a high humidity, and a large amount of water vapor will also be lost, resulting in a significant reduction in the fresh-keeping effect.

[0058] In order to solve the above problems, the present invention improves the fresh-keeping drawer in the related art based on the comprehensive application of the carbon dioxide separation membrane, the solenoid valve and the vacuum pump. The present invention will be described in detail below with reference to the accompanying drawings:

[0059] Reference Figure 1 , shows a schematic diagram of the overall structure of a fresh-keeping drawer provided in some embodiments of the present invention, the fresh-keeping drawer comprising:

[0060] Drawer body 1;

[0061] A cavity 3, wherein the cavity 3 is used to accommodate the drawer body 1;

[0062] A carbon dioxide gas-conditioning component 4, wherein the carbon dioxide gas-conditioning component 4 is disposed on the top of the cavity 3 and the carbon dioxide gas-conditioning component 4 at least comprises a carbon dioxide separation membrane 41;

[0063] A solenoid valve 5, wherein the solenoid valve 5 is disposed on the outer surface of the cavity 3 and the solenoid valve 5 is connected to the interior of the cavity 3 through a solenoid valve air inlet pipe 71;

[0064] The vacuum pump 6 is disposed on the outer surface of the cavity 3 and is connected to the air outlet of the solenoid valve 5 through a vacuum pump air inlet pipe 72 .

[0065] In the specific implementation, Figure 2As shown, the fresh-keeping drawer provided by the present invention can be applied to fresh-keeping appliances such as refrigerators, and can be mainly composed of a drawer body 1, a cavity 3, a carbon dioxide gas conditioning component 4, a solenoid valve 5 and a vacuum pump 6; wherein, the front end opening of the cavity 3 and the left and right sides inside can be provided with horizontal guide rails, so that the drawer body 1 can be closed or opened from the front end opening of the cavity 3, and an annular sealing ring 2 can be provided at the junction of the drawer body 1 and the cavity 3, so as to ensure that a closed space is formed inside the cavity 3 after the drawer body 1 is closed; in addition, at the top of the cavity 3, at least a carbon dioxide separation membrane 41 (i.e. Figure 2 The carbon dioxide gas conditioning component 4 in 4-1) is used to achieve the selective permeation of carbon dioxide; the solenoid valve 5 can be arranged on the outer surface of the cavity 3 and through the solenoid valve inlet pipe 71 (i.e. Figure 2 7-1), connected to the interior of the cavity 3; the vacuum pump 6 can be arranged on the outer surface of the cavity 3 and the vacuum pump 6 passes through the vacuum pump inlet pipe 72 (ie Figure 2 7-2) is connected to the outlet end of the solenoid valve 5;

[0066] Among them, the carbon dioxide separation membrane is a polymer selective permeable membrane. The carbon dioxide separation membrane used in the present invention can be a commonly used membrane in chemical production, such as cellulose acetate membrane, polyphenylene ether membrane and ethyl cellulose membrane; in addition, more new membrane materials have gradually emerged in recent years, such as polyphenylene oxide modified membrane, diamine-containing polycarbonate composite membrane, etc., which have higher permeability to carbon dioxide, so they can also be selected according to actual needs. Due to the different dissolution and diffusion rates of different gases in the carbon dioxide separation membrane, under the action of the partial pressure difference on both sides of the carbon dioxide separation membrane, the relative permeability of each gas is also different. Gases with high permeability can reach low pressure measurement through the carbon dioxide separation membrane, and gases with low permeability can be trapped on the high pressure side, thereby achieving the separation of the target gas. In general, the permeation rates of different gases in the carbon dioxide separation membrane are from large to small: water vapor, He, H2, H2S, CO2, O2, CO, CH4, N2, C2H5, that is, carbon dioxide can pass through the carbon dioxide separation membrane faster than oxygen and nitrogen.

[0067] Furthermore, based on the above content, Figure 3 As shown, when the user closes the drawer body 1, a closed space is formed inside the fresh-keeping drawer. At this time, the carbon dioxide concentration inside the fresh-keeping drawer can be detected by the carbon dioxide concentration sensor 8 installed on the inner surface of the top of the cavity 3. When the drawer body 1 is closed for the first time, the carbon dioxide concentration is generally 0.031%, the oxygen concentration is generally 20.9%, and the air pressure is generally normal pressure. The preset values ​​of the first preset threshold value C1 to the second preset threshold value C2 (such as 3% to 5%) can be set according to the optimal fresh-keeping carbon dioxide concentration for different stored items, and the carbon dioxide concentration exceeds the standard value, that is, the third preset threshold value C3 (such as 10%).

[0068] Furthermore, in actual application, when the carbon dioxide concentration inside the fresh-keeping drawer is less than a preset value C1 (such as 3%), the solenoid valve 5 can be opened and the vacuum pump 6 can be started. The air inside the fresh-keeping drawer can be extracted under the action of the vacuum pump 6, thereby forming a negative pressure inside the fresh-keeping drawer; under the action of the negative pressure, the external air can be forced to pass through the carbon dioxide separation membrane 41 and enter the fresh-keeping drawer. Thereby, the carbon dioxide concentration in the internal space is increased, and the oxygen concentration is reduced; when the carbon dioxide concentration reaches a preset value C2 (such as 5%), the vacuum pump 6 can be stopped and the solenoid valve 5 can be closed to maintain the carbon dioxide concentration.

[0069] Furthermore, if during the storage process, the carbon dioxide concentration inside the fresh-keeping drawer is too high (the oxygen concentration is too low) and reaches a preset value C3 (such as 10%), the solenoid valve 5 can be opened to connect the inside of the fresh-keeping drawer with the outside, and the carbon dioxide concentration inside the fresh-keeping drawer can be reduced (the oxygen concentration increased) through free diffusion. When the carbon dioxide concentration drops to the preset value C2, the solenoid valve 5 can be closed to maintain the carbon dioxide concentration range within the optimal range.

[0070] Furthermore, since it is difficult to achieve absolute airtightness in the mechanical structure, the carbon dioxide concentration will generally not be within the optimal range after a period of pressure maintenance, or this situation may also occur when the user opens the drawer and causes external air to enter. Therefore, when the carbon dioxide leakage inside the fresh-keeping drawer drops to the preset value C1, the gas conditioning operation can be started again, that is, the solenoid valve 5 can be opened again and the vacuum pump 6 can be started and subsequent control can be performed according to the same logic; thereby, the space of the fresh-keeping drawer is always maintained within the optimal fresh-keeping carbon dioxide concentration range C1-C2, and there is no large negative pressure inside the cavity 3.

[0071] In some embodiments of the present invention, the cavity 3 comprises:

[0072] A controlled atmosphere membrane mounting hole 31, wherein the controlled atmosphere membrane mounting hole 31 is disposed at the top of the cavity 3 and is connected to the carbon dioxide separation membrane 41;

[0073] An exhaust hole 32, wherein an air inlet end of the exhaust hole 32 is connected to the interior of the cavity 3 and an air outlet end of the exhaust hole 32 is connected to an air inlet end of the solenoid valve air inlet pipe 71;

[0074] The support plate mounting seat 33 is arranged on the inner surface of the cavity 3 .

[0075] In practical applications, a gas-controlled membrane mounting hole 31 (i.e. Figure 2 3-1) for installing the carbon dioxide separation membrane 41, and a vent hole 32 (i.e. Figure 23-2), and the air inlet end of the exhaust hole 32 is connected to the inside of the cavity 3 and the air outlet end of the exhaust hole 32 is connected to the air inlet end of the solenoid valve air inlet pipe 71 to achieve gas extraction; a support plate mounting seat 33 (i.e. Figure 2 3-3) is used to install the support plate assembly in the carbon dioxide gas conditioning assembly 4;

[0076] Specifically, the carbon dioxide gas conditioning assembly 4 can be mainly composed of a carbon dioxide separation membrane 41, a separation membrane mounting grid 42 (i.e. Figure 2 4-2), sealing gasket 43 (i.e. Figure 2 4-3), sealing plate 44 (i.e. Figure 2 4-4), spring 45 (i.e. Figure 2 4-5) and support plate 46 (i.e. Figure 2 4-6); wherein the separation membrane mounting grid 42 can be used to press the carbon dioxide separation membrane 41 onto the gas-conditioning membrane mounting hole 31 reserved in the cavity 3 (for example, it can be assembled by means of a drawstring or interference fit); the sealing gasket 43 can be annular and can be fixed on the surface of the cavity 3, and can be arranged between the cavity 3 and the sealing plate 44 to ensure sealing; the support plate 46 can be fixed on the cavity 3 by the support plate mounting seat 33 on the cavity 3, and the spring 45 can be arranged between the sealing plate 44 and the support plate 46; the sealing plate 44 can be set as a movable part, that is, when the spring 45 maintains a normal state, the sealing plate 44 will be close to the sealing gasket 43 to close the gas channel, and when the spring 45 is out of compression, the sealing plate 44 can move downward to disengage from the sealing gasket 43, so that the gas channel is opened;

[0077] In one example, it can be set that in a normal state, the support plate 46 can be fixed on the support plate mounting seat 33 on the cavity 3 by snapping, and multiple springs 45 can be set between the support plate 46 and the sealing plate 44. Under the elastic force of the spring 45, the sealing plate 44 can press the sealing gasket 43 upward, and the sealing gasket 43 can be installed on the cavity 3, thereby achieving the sealing of the gas-conditioned space. And the elastic force of the spring 45 can be set to be slightly greater than the weight of the sealing plate 44, so that the sealing can be ensured without the action of external force.

[0078] In some embodiments of the present invention, the carbon dioxide gas conditioning component 4 further includes:

[0079] A separation membrane installation grid 42, wherein the separation membrane installation grid 42 is attached to and connected to the top of the carbon dioxide separation membrane 41;

[0080] A sealing gasket 43, wherein the sealing gasket 43 is arranged on the inner surface of the cavity 3;

[0081] A support plate 46, wherein the support plate 46 is connected to the cavity 3 through the support plate mounting seat 33;

[0082] A spring 45, wherein the spring 45 is disposed between the support plate 46 and the sealing gasket 43 and the spring 45 is connected to the support plate 46;

[0083] The sealing plate 44 is disposed between the supporting plate 46 and the sealing gasket 43 and is connected to an end of the spring 45 away from the supporting plate 46 .

[0084] In a specific implementation, the carbon dioxide gas-conditioning component 4 can be mainly composed of a carbon dioxide separation membrane 41, a separation membrane mounting grid 42, a sealing gasket 43, a sealing plate 44, a spring 45 and a support plate 46; wherein the separation membrane mounting grid 42 can be used to press the carbon dioxide separation membrane 41 onto the gas-conditioning membrane mounting hole 31 reserved in the cavity 3 (for example, it can be assembled by a buckle or interference fit); the sealing gasket 43 can be annular and can be fixed on the inner surface of the cavity 3, and can be arranged between the cavity 3 and the sealing plate 44 to ensure sealing; the support plate 46 can be fixed on the cavity 3 through the support plate mounting seat 33 on the cavity 3, and the spring 45 can be arranged between the sealing plate 44 and the support plate 46; the sealing plate 44 can be set as a movable part, that is, when the spring 45 is kept in a normal state, the sealing plate 44 will be close to the sealing gasket 43 to close the gas channel, and when the spring 45 is out of compression, the sealing plate 44 can move downward to disengage from the sealing gasket 43, so that the gas channel is opened;

[0085] In one example, it can be set that in a normal state, the support plate 46 can be fixed on the support plate mounting seat 33 on the cavity 3 by snapping, and multiple springs 45 can be set between the support plate 46 and the sealing plate 44. Under the elastic force of the spring 45, the sealing plate 44 can press the sealing gasket 43 upward, and the sealing gasket 43 can be installed on the cavity 3, thereby achieving the sealing of the gas-conditioned space. And the elastic force of the spring 45 can be set to be slightly greater than the weight of the sealing plate 44, so that the sealing can be ensured without the action of external force.

[0086] On the basis of the above content, when the vacuum pump 6 is started, the air inside the fresh-keeping drawer (including oxygen, nitrogen and other gases) can be extracted, thereby forming a negative pressure inside the fresh-keeping drawer. Under the action of negative pressure, the spring 45 in the carbon dioxide gas conditioning assembly 4 is compressed, the sealing plate 44 is separated from the sealing gasket 43, and the external air enters the internal space of the fresh-keeping drawer through the carbon dioxide separation membrane 41. Thereby, the carbon dioxide concentration in the internal space is increased and the oxygen concentration is reduced, thereby improving the preservation effect of the internal space of the fresh-keeping drawer. And it will not cause a large negative pressure state inside, and it is not necessary to use high-strength materials and structures to avoid deformation of the cavity 3. When the vacuum pump 6 stops, the internal negative pressure will slowly rise, and the spring 45 will return to its original state and return to a sealed state, which can avoid the loss of carbon dioxide and water vapor in the internal space of the fresh-keeping drawer. If the internal carbon dioxide concentration is too high (the oxygen concentration is too low) during storage, which may produce the "poisoning" effect of anaerobic respiration, the solenoid valve 5 can be opened to connect the internal space of the fresh-keeping drawer with the outside, and the carbon dioxide concentration in the internal space of the fresh-keeping drawer can be reduced (the oxygen concentration is increased) by free diffusion.

[0087] In some embodiments of the present invention, the fresh-keeping drawer further includes:

[0088] An annular sealing ring 2 is provided at the junction of the drawer body 1 and the cavity 3 .

[0089] In practical applications, an annular sealing ring 2 may be provided at the junction of the drawer body 1 and the cavity 3 to ensure that a closed space is formed inside the cavity 3 after the drawer body 1 is closed.

[0090] In some embodiments of the present invention, the fresh-keeping drawer further includes:

[0091] The carbon dioxide concentration sensor 8 is arranged on the inner surface of the cavity 3 .

[0092] In practical applications, such as Figure 3 As shown, when the user closes the drawer body 1, a closed space is formed inside the fresh-keeping drawer. At this time, the carbon dioxide concentration inside the fresh-keeping drawer can be detected by the carbon dioxide concentration sensor 8 installed on the inner surface of the top of the cavity 3. When the drawer body 1 is closed for the first time, the carbon dioxide concentration is generally 0.031%, the oxygen concentration is generally 20.9%, and the air pressure is generally normal pressure. The preset values ​​of the first preset threshold value C1 to the second preset threshold value C2 (such as 3% to 5%) can be set according to the optimal fresh-keeping carbon dioxide concentration for different stored items, and the carbon dioxide concentration exceeds the standard value, that is, the third preset threshold value C3 (such as 10%).

[0093] Furthermore, in actual application, when the carbon dioxide concentration inside the fresh-keeping drawer is less than a preset value C1 (such as 3%), the solenoid valve 5 can be opened and the vacuum pump 6 can be started. The air inside the fresh-keeping drawer can be extracted under the action of the vacuum pump 6, thereby forming a negative pressure inside the fresh-keeping drawer; under the action of the negative pressure, the external air can be forced to pass through the carbon dioxide separation membrane 41 and enter the fresh-keeping drawer. Thereby, the carbon dioxide concentration in the internal space is increased, and the oxygen concentration is reduced; when the carbon dioxide concentration reaches a preset value C2 (such as 5%), the vacuum pump 6 can be stopped and the solenoid valve 5 can be closed to maintain the carbon dioxide concentration.

[0094] Furthermore, if during the storage process, the carbon dioxide concentration inside the fresh-keeping drawer is too high (the oxygen concentration is too low) and reaches a preset value C3 (such as 10%), the solenoid valve 5 can be opened to connect the inside of the fresh-keeping drawer with the outside, and the carbon dioxide concentration inside the fresh-keeping drawer can be reduced (the oxygen concentration increased) through free diffusion. When the carbon dioxide concentration drops to the preset value C2, the solenoid valve 5 can be closed to maintain the carbon dioxide concentration range within the optimal range.

[0095] Furthermore, since it is difficult to achieve absolute airtightness in the mechanical structure, the carbon dioxide concentration will generally not be within the optimal range after a period of pressure maintenance, or this situation may also occur when the user opens the drawer and causes external air to enter. Therefore, when the carbon dioxide leakage inside the fresh-keeping drawer drops to the preset value C1, the gas conditioning operation can be started again, that is, the solenoid valve 5 can be opened again and the vacuum pump 6 can be started and subsequent control can be performed according to the same logic; thereby, the space of the fresh-keeping drawer is always maintained within the optimal fresh-keeping carbon dioxide concentration range C1-C2, and there is no large negative pressure inside the cavity 3.

[0096] In some embodiments of the present invention, the carbon dioxide separation membrane 41 is any one of a cellulose acetate membrane, a polyphenylene ether membrane, a polyphenylene oxide modified membrane, a diamine-containing polycarbonate composite membrane, and an ethyl cellulose membrane.

[0097] In practical applications, the carbon dioxide separation membrane is a polymer selective permeable membrane. The carbon dioxide separation membrane used in the present invention can be a commonly used membrane in chemical production, such as cellulose acetate membrane, polyphenylene ether membrane and ethyl cellulose membrane; in addition, more new membrane materials have gradually emerged in recent years, such as polyphenylene oxide modified membrane, diamine-containing polycarbonate composite membrane, etc., which have higher permeability to carbon dioxide, so they can also be selected according to actual needs. Due to the different dissolution and diffusion rates of different gases in the carbon dioxide separation membrane, under the action of the partial pressure difference on both sides of the carbon dioxide separation membrane, the relative permeability of each gas is also different. The gas with high permeability can reach the low pressure measurement through the carbon dioxide separation membrane, and the gas with low permeability can be trapped on the high pressure side, thereby achieving the separation of the target gas. In general, the permeation rates of different gases in the carbon dioxide separation membrane are from large to small: water vapor, He, H2, H2S, CO2, O2, CO, CH4, N2, C2H5, that is, carbon dioxide can pass through the carbon dioxide separation membrane faster than oxygen and nitrogen.

[0098] Reference Figure 4 , showing a flow chart of steps of a control method of a fresh-keeping drawer provided by some embodiments of the present invention, the fresh-keeping drawer comprises a drawer body 1; a cavity 3, the cavity 3 is used to accommodate the drawer body 1; a carbon dioxide gas-conditioning component 4, the carbon dioxide gas-conditioning component 4 is arranged on the top of the cavity 3 and the carbon dioxide gas-conditioning component 4 at least comprises a carbon dioxide separation membrane 41; a solenoid valve 5, the solenoid valve 5 is arranged on the outer surface of the cavity 3 and the solenoid valve 5 is connected to the inside of the cavity 3 through a solenoid valve air inlet pipe 71; a vacuum pump 6, the vacuum pump 6 is arranged on the outer surface of the cavity 3 and the vacuum pump 6 is connected to the air outlet end of the solenoid valve 5 through a vacuum pump air inlet pipe 72; specifically, the following steps may be included:

[0099] Step 401, in response to the closing operation of the drawer body 1, obtaining carbon dioxide concentration information in the cavity 3, and determining whether the carbon dioxide concentration is less than a first preset threshold;

[0100] In practical applications, such as Figure 2 As shown, the fresh-keeping drawer provided by the present invention can be mainly composed of a drawer body 1, a cavity 3, a carbon dioxide gas conditioning component 4, a solenoid valve 5 and a vacuum pump 6; wherein, the front opening of the cavity 3 and the left and right sides inside can be provided with horizontal guide rails, so that the drawer body 1 can be closed or opened from the front opening of the cavity 3, and an annular sealing ring 2 can be provided at the junction of the drawer body 1 and the cavity 3, so as to ensure that a closed space is formed inside the cavity 3 after the drawer body 1 is closed; in addition, at least a carbon dioxide separation membrane 41 (i.e. Figure 2The carbon dioxide gas conditioning component 4 in 4-1) is used to achieve the selective permeation of carbon dioxide; the solenoid valve 5 can be arranged on the outer surface of the cavity 3 and through the solenoid valve inlet pipe 71 (i.e. Figure 2 7-1), connected to the interior of the cavity 3; the vacuum pump 6 can be arranged on the outer surface of the cavity 3 and the vacuum pump 6 passes through the vacuum pump inlet pipe 72 (ie Figure 2 7-2) is connected to the outlet end of the solenoid valve 5;

[0101] Among them, the carbon dioxide separation membrane is a polymer selective permeable membrane. The carbon dioxide separation membrane used in the present invention can be a commonly used membrane in chemical production, such as cellulose acetate membrane, polyphenylene ether membrane and ethyl cellulose membrane; in addition, more new membrane materials have gradually emerged in recent years, such as polyphenylene oxide modified membrane, diamine-containing polycarbonate composite membrane, etc., which have higher permeability to carbon dioxide, so they can also be selected according to actual needs. Due to the different dissolution and diffusion rates of different gases in the carbon dioxide separation membrane, under the action of the partial pressure difference on both sides of the carbon dioxide separation membrane, the relative permeability of each gas is also different. Gases with high permeability can reach low pressure measurement through the carbon dioxide separation membrane, and gases with low permeability can be trapped on the high pressure side, thereby achieving the separation of the target gas. In general, the permeation rates of different gases in the carbon dioxide separation membrane are from large to small: water vapor, He, H2, H2S, CO2, O2, CO, CH4, N2, C2H5, that is, carbon dioxide can pass through the carbon dioxide separation membrane faster than oxygen and nitrogen.

[0102] Furthermore, based on the above content, Figure 3 As shown, when the user closes the drawer body 1, a closed space is formed inside the fresh-keeping drawer. At this time, the carbon dioxide concentration inside the fresh-keeping drawer can be detected by the carbon dioxide concentration sensor 8 installed on the inner surface of the top of the cavity 3. When the drawer body 1 is closed for the first time, the carbon dioxide concentration is generally 0.031%, the oxygen concentration is generally 20.9%, and the air pressure is generally normal pressure. The preset values ​​of the first preset threshold value C1 to the second preset threshold value C2 (such as 3% to 5%) can be set according to the optimal fresh-keeping carbon dioxide concentration for different stored items, and the carbon dioxide concentration exceeds the standard value, that is, the third preset threshold value C3 (such as 10%).

[0103] Furthermore, in practical applications, Figure 5As shown, when the carbon dioxide concentration inside the fresh-keeping drawer is less than the preset value C1 (such as 3%), the solenoid valve 5 can be opened and the vacuum pump 6 can be started. Under the action of the vacuum pump 6, the air inside the fresh-keeping drawer can be extracted, thereby forming a negative pressure inside the fresh-keeping drawer; under the action of the negative pressure, the external air can be forced to pass through the carbon dioxide separation membrane 41 into the fresh-keeping drawer. Thereby, the carbon dioxide concentration in the internal space is increased, and the oxygen concentration is reduced; when the carbon dioxide concentration reaches the preset value C2 (such as 5%), the vacuum pump 6 can be stopped and the solenoid valve 5 can be closed to maintain the carbon dioxide concentration.

[0104] Furthermore, if during the storage process, the carbon dioxide concentration inside the fresh-keeping drawer is too high (the oxygen concentration is too low) and reaches a preset value C3 (such as 10%), the solenoid valve 5 can be opened to connect the inside of the fresh-keeping drawer with the outside, and the carbon dioxide concentration inside the fresh-keeping drawer can be reduced (the oxygen concentration increased) through free diffusion. When the carbon dioxide concentration drops to the preset value C2, the solenoid valve 5 can be closed to maintain the carbon dioxide concentration range within the optimal range.

[0105] Furthermore, since it is difficult to achieve absolute airtightness in the mechanical structure, the carbon dioxide concentration will generally not be within the optimal range after a period of pressure maintenance, or this situation may also occur when the user opens the drawer and causes external air to enter. Therefore, when the carbon dioxide leakage inside the fresh-keeping drawer drops to the preset value C1, the gas conditioning operation can be started again, that is, the solenoid valve 5 can be opened again and the vacuum pump 6 can be started and subsequent control can be performed according to the same logic; thereby, the space of the fresh-keeping drawer is always maintained within the optimal fresh-keeping carbon dioxide concentration range C1-C2, and there is no large negative pressure inside the cavity 3.

[0106] Step 402: if the carbon dioxide concentration is less than the first preset threshold, the solenoid valve 5 and the vacuum pump 6 are turned on, and it is determined whether the carbon dioxide concentration is greater than or equal to a second preset threshold; wherein the second preset threshold is greater than the first preset threshold;

[0107] In practical applications, when the carbon dioxide concentration inside the fresh-keeping drawer is less than a preset value C1 (such as 3%), the solenoid valve 5 can be opened and the vacuum pump 6 can be started. The air inside the fresh-keeping drawer can be extracted under the action of the vacuum pump 6, thereby forming a negative pressure inside the fresh-keeping drawer; under the action of the negative pressure, the external air can be forced to pass through the carbon dioxide separation membrane 41 and enter the fresh-keeping drawer. Thereby, the carbon dioxide concentration in the internal space is increased, and the oxygen concentration is reduced.

[0108] Step 403: If the carbon dioxide concentration is greater than or equal to the second preset threshold, the solenoid valve 5 and the vacuum pump 6 are closed.

[0109] In a specific implementation, when the carbon dioxide concentration reaches a preset value C2 (eg, 5%), the vacuum pump 6 may be stopped and the solenoid valve 5 may be closed to maintain the carbon dioxide concentration within an optimal range.

[0110] In some embodiments of the present invention, the method further comprises:

[0111] Determine whether the carbon dioxide concentration is greater than or equal to a third preset threshold value, and if the carbon dioxide concentration is greater than or equal to the third preset threshold value, open the solenoid valve 5 and determine whether the carbon dioxide concentration is less than or equal to the second preset threshold value; wherein the third preset threshold value is greater than the second preset threshold value;

[0112] If the carbon dioxide concentration is less than or equal to the second preset threshold, the solenoid valve 5 is closed.

[0113] In a specific implementation, if during the storage process, the carbon dioxide concentration inside the fresh-keeping drawer is too high (the oxygen concentration is too low) and reaches a preset value C3 (such as 10%), the solenoid valve 5 can be opened to connect the inside of the fresh-keeping drawer with the outside, and the carbon dioxide concentration inside the fresh-keeping drawer can be reduced (the oxygen concentration increased) through free diffusion. When the carbon dioxide concentration drops to the preset value C2, the solenoid valve 5 can be closed to maintain the carbon dioxide concentration range within the optimal range.

[0114] In some embodiments of the present invention, the method further comprises:

[0115] Determine whether the carbon dioxide concentration is less than or equal to the first preset threshold value. If the carbon dioxide concentration is less than or equal to the first preset threshold value, execute the step of opening the solenoid valve 5 and the vacuum pump 6 again, and determine whether the carbon dioxide concentration is greater than or equal to the second preset threshold value.

[0116] In actual applications, since it is difficult for the mechanical structure to be absolutely airtight, the carbon dioxide concentration will generally not be within the optimal range after a period of pressure maintenance, or this situation may occur when the user opens the drawer and causes external air to enter. Therefore, when the carbon dioxide leakage inside the fresh-keeping drawer drops to the preset value C1, the gas conditioning operation can be started again, that is, the solenoid valve 5 can be opened again and the vacuum pump 6 can be started and the subsequent control can be performed according to the same logic; so that the space of the fresh-keeping drawer is always maintained within the optimal fresh-keeping carbon dioxide concentration range C1~C2, and there is no large negative pressure inside the cavity 3.

[0117] The fresh-keeping drawer of the present invention is mainly composed of a cavity, a drawer, a carbon dioxide gas-conditioning component, a vacuum pump, etc. The drawer can be pushed into the cavity, and an annular sealing ring is arranged at the joint to form a closed space. A carbon dioxide gas-conditioning component is arranged on the top of the cavity, an exhaust hole is arranged on the cavity, and a vacuum pump, a solenoid valve and a plurality of pipelines are arranged outside. The carbon dioxide gas-conditioning component is mainly composed of a carbon dioxide separation membrane, a separation membrane mounting grid, a sealing gasket, a sealing plate, a spring, a support plate, etc. After the vacuum pump is started, the air inside the fresh-keeping space is extracted, thereby forming a negative pressure inside the fresh-keeping space. Under the action of the negative pressure, the spring of the carbon dioxide gas-conditioning component is compressed, the sealing plate is separated from the sealing gasket, and the external air enters the fresh-keeping space through the carbon dioxide separation membrane. Thereby, the carbon dioxide concentration in the internal space is increased, and the oxygen concentration is reduced, thereby improving the fresh-keeping effect of the fresh-keeping space. And it will not cause a large negative pressure state inside, and it is not necessary to use high-strength materials and structures to avoid cavity deformation. When the vacuum pump stops, the internal negative pressure slowly rises, and the spring returns to its original state, thus returning to a sealed state, which can prevent the loss of carbon dioxide and water vapor in the internal space. If the internal carbon dioxide concentration is too high (oxygen concentration is too low) during storage, which may cause the "toxic" effect of anaerobic respiration, the solenoid valve opens to connect the fresh-keeping space with the outside, and the carbon dioxide concentration in the fresh-keeping space is reduced (oxygen concentration is increased) through free diffusion.

[0118] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0119] Reference Figure 6 , shows a schematic structural diagram of a control device for a fresh-keeping drawer provided by some embodiments of the present invention, wherein the fresh-keeping drawer comprises a drawer body 1; a cavity 3, wherein the cavity 3 is used to accommodate the drawer body 1; a carbon dioxide gas-conditioning component 4, wherein the carbon dioxide gas-conditioning component 4 is disposed at the top of the cavity 3 and the carbon dioxide gas-conditioning component 4 at least comprises a carbon dioxide separation membrane 41; a solenoid valve 5, wherein the solenoid valve 5 is disposed on the outer surface of the cavity 3 and the solenoid valve 5 is connected to the interior of the cavity 3 through a solenoid valve air inlet pipe 71; a vacuum pump 6, wherein the vacuum pump 6 is disposed on the outer surface of the cavity 3 and the vacuum pump 6 is connected to the air outlet end of the solenoid valve 5 through a vacuum pump air inlet pipe 72; and specifically may comprise the following modules:

[0120] A first carbon dioxide concentration determination module 601 is used to obtain carbon dioxide concentration information in the cavity 3 in response to the closing operation of the drawer body 1, and determine whether the carbon dioxide concentration is less than a first preset threshold;

[0121] The solenoid valve and vacuum pump opening module 602 is used to open the solenoid valve 5 and the vacuum pump 6 if the carbon dioxide concentration is less than the first preset threshold, and to determine whether the carbon dioxide concentration is greater than or equal to a second preset threshold; wherein the second preset threshold is greater than the first preset threshold;

[0122] The solenoid valve and vacuum pump closing module 603 is used to close the solenoid valve 5 and the vacuum pump 6 if the carbon dioxide concentration is greater than or equal to the second preset threshold.

[0123] In some embodiments of the present invention, the device further comprises:

[0124] a second carbon dioxide concentration judgment module, for judging whether the carbon dioxide concentration is greater than or equal to a third preset threshold value, and if the carbon dioxide concentration is greater than or equal to the third preset threshold value, opening the solenoid valve 5 and judging whether the carbon dioxide concentration is less than or equal to the second preset threshold value; wherein the third preset threshold value is greater than the second preset threshold value;

[0125] The solenoid valve closing processing module is used to close the solenoid valve 5 if the carbon dioxide concentration is less than or equal to the second preset threshold.

[0126] In some embodiments of the present invention, the device further comprises:

[0127] The module is executed again, and is used to determine whether the carbon dioxide concentration is less than or equal to the first preset threshold value. If the carbon dioxide concentration is less than or equal to the first preset threshold value, the steps of opening the solenoid valve 5 and the vacuum pump 6 are executed again, and determining whether the carbon dioxide concentration is greater than or equal to the second preset threshold value.

[0128] Some embodiments of the present invention further provide an electronic device, which may include a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the control method of the fresh-keeping drawer as described above is implemented.

[0129] Some embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the control method of the fresh-keeping drawer as described above is implemented.

[0130] Some embodiments of the present invention further provide a computer program product, including a computer program, which implements the above-mentioned control method of the fresh-keeping drawer when executed by a processor.

[0131] Some embodiments of the present invention further provide a household appliance, comprising the fresh-keeping drawer as described above.

[0132] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0133] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0134] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0135] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0136] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0137] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0138] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0139] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the above elements.

[0140] The above is a detailed introduction to a fresh-keeping drawer and a control method, device, equipment, and medium for the fresh-keeping drawer. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a general technician in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A fresh-keeping drawer, characterized in that: The fresh-keeping drawer comprises: Drawer body (1); A cavity (3), the cavity (3) being used to accommodate the drawer body (1); A carbon dioxide gas conditioning component (4), wherein the carbon dioxide gas conditioning component (4) is arranged on the top of the cavity (3) and the carbon dioxide gas conditioning component (4) at least comprises a carbon dioxide separation membrane (41); A solenoid valve (5), the solenoid valve (5) being arranged on the outer surface of the cavity (3) and the solenoid valve (5) being connected to the interior of the cavity (3) via a solenoid valve air inlet pipe (71); A vacuum pump (6), wherein the vacuum pump (6) is arranged on the outer surface of the cavity (3) and the vacuum pump (6) is connected to the air outlet end of the solenoid valve (5) via a vacuum pump air inlet pipe (72).

2. The fresh-keeping drawer according to claim 1, characterized in that: The cavity (3) comprises: A controlled atmosphere membrane installation hole (31), wherein the controlled atmosphere membrane installation hole (31) is arranged at the top of the cavity (3) and the controlled atmosphere membrane installation hole (31) is connected to the carbon dioxide separation membrane (41); An exhaust hole (32), wherein an air inlet end of the exhaust hole (32) is connected to the interior of the cavity (3) and an air outlet end of the exhaust hole (32) is connected to an air inlet end of an air inlet pipe (71) of the solenoid valve; A support plate mounting seat (33), wherein the support plate mounting seat (33) is arranged on the inner surface of the cavity (3).

3. The fresh-keeping drawer according to claim 2, characterized in that: The carbon dioxide gas conditioning component (4) further comprises: A separation membrane installation grid (42), wherein the separation membrane installation grid (42) is attached and connected to the top of the carbon dioxide separation membrane (41); A sealing gasket (43), wherein the sealing gasket (43) is arranged on the inner surface of the cavity (3); A support plate (46), wherein the support plate (46) is connected to the cavity (3) via the support plate mounting seat (33); a spring (45), wherein the spring (45) is disposed between the support plate (46) and the sealing gasket (43) and the spring (45) is connected to the support plate (46); A sealing plate (44), wherein the sealing plate (44) is disposed between the supporting plate (46) and the sealing gasket (43) and the sealing plate (44) is connected to an end of the spring (45) away from the supporting plate (46).

4. The fresh-keeping drawer according to claim 1, characterized in that: The fresh-keeping drawer also includes: An annular sealing ring (2), wherein the annular sealing ring (2) is arranged at the junction of the drawer body (1) and the cavity (3).

5. The fresh-keeping drawer according to claim 1, characterized in that: The fresh-keeping drawer also includes: A carbon dioxide concentration sensor (8), wherein the carbon dioxide concentration sensor (8) is arranged on the inner surface of the cavity (3).

6. The fresh-keeping drawer according to claim 3, characterized in that: The carbon dioxide separation membrane (41) is any one of a cellulose acetate membrane, a polyphenylene ether membrane, a polyphenylene oxide modified membrane, a diamine-containing polycarbonate composite membrane, and an ethyl cellulose membrane.

7. A method for controlling a fresh-keeping drawer, characterized in that: The fresh-keeping drawer comprises a drawer body (1); a cavity (3), wherein the cavity (3) is used to accommodate the drawer body (1); a carbon dioxide gas-conditioning component (4), wherein the carbon dioxide gas-conditioning component (4) is arranged on the top of the cavity (3) and the carbon dioxide gas-conditioning component (4) at least comprises a carbon dioxide separation membrane (41); a solenoid valve (5), wherein the solenoid valve (5) is arranged on the outer surface of the cavity (3) and the solenoid valve (5) is connected to the interior of the cavity (3) via a solenoid valve air inlet pipe (71); and a vacuum pump (6), wherein the vacuum pump (6) is arranged on the outer surface of the cavity (3) and the vacuum pump (6) is connected to the air outlet end of the solenoid valve (5) via a vacuum pump air inlet pipe (72); the method comprises: In response to a closing operation of the drawer body (1), obtaining carbon dioxide concentration information in the cavity (3), and determining whether the carbon dioxide concentration is less than a first preset threshold; If the carbon dioxide concentration is less than the first preset threshold, the solenoid valve (5) and the vacuum pump (6) are turned on, and it is determined whether the carbon dioxide concentration is greater than or equal to a second preset threshold; wherein the second preset threshold is greater than the first preset threshold; If the carbon dioxide concentration is greater than or equal to the second preset threshold, the solenoid valve (5) and the vacuum pump (6) are closed.

8. The method according to claim 7, characterized in that The method further comprises: determining whether the carbon dioxide concentration is greater than or equal to a third preset threshold value, and if the carbon dioxide concentration is greater than or equal to the third preset threshold value, opening the solenoid valve (5) and determining whether the carbon dioxide concentration is less than or equal to the second preset threshold value; wherein the third preset threshold value is greater than the second preset threshold value; If the carbon dioxide concentration is less than or equal to the second preset threshold, the solenoid valve (5) is closed.

9. The method according to claim 7, characterized in that: The method further comprises: Determine whether the carbon dioxide concentration is less than or equal to the first preset threshold value. If the carbon dioxide concentration is less than or equal to the first preset threshold value, execute the step of opening the solenoid valve (5) and the vacuum pump (6) again, and determine whether the carbon dioxide concentration is greater than or equal to the second preset threshold value.

10. A control device for a fresh-keeping drawer, characterized in that: The fresh-keeping drawer comprises a drawer body (1); a cavity (3), wherein the cavity (3) is used to accommodate the drawer body (1); a carbon dioxide gas-conditioning component (4), wherein the carbon dioxide gas-conditioning component (4) is arranged on the top of the cavity (3) and the carbon dioxide gas-conditioning component (4) at least comprises a carbon dioxide separation membrane (41); a solenoid valve (5), wherein the solenoid valve (5) is arranged on the outer surface of the cavity (3) and the solenoid valve (5) is connected to the interior of the cavity (3) via a solenoid valve air inlet pipe (71); and a vacuum pump (6), wherein the vacuum pump (6) is arranged on the outer surface of the cavity (3) and the vacuum pump (6) is connected to the air outlet end of the solenoid valve (5) via a vacuum pump air inlet pipe (72); the device comprises: a first carbon dioxide concentration determination module, configured to obtain carbon dioxide concentration information in the cavity (3) in response to a closing operation of the drawer body (1), and to determine whether the carbon dioxide concentration is less than a first preset threshold; a solenoid valve and vacuum pump opening module, configured to open the solenoid valve (5) and the vacuum pump (6) if the carbon dioxide concentration is less than the first preset threshold, and determine whether the carbon dioxide concentration is greater than or equal to a second preset threshold; wherein the second preset threshold is greater than the first preset threshold; The solenoid valve and vacuum pump closing module is used to close the solenoid valve (5) and the vacuum pump (6) if the carbon dioxide concentration is greater than or equal to the second preset threshold value.

11. An electronic device, characterized in that: The method comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the control method of the fresh-keeping drawer as claimed in any one of claims 7 to 9.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method of the fresh-keeping drawer according to any one of claims 7 to 9 is implemented.

13. A computer program product, characterized in that The method comprises a computer program, which, when executed by a processor, implements the control method of the fresh-keeping drawer as claimed in any one of claims 7 to 9.

14. A household appliance, characterized in that: The household appliance comprises a fresh-keeping drawer as described in any one of claims 1-6.

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