CN113137805A - Gas concentration regulation and control method for refrigerator and refrigerator - Google Patents

Gas concentration regulation and control method for refrigerator and refrigerator Download PDF

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Publication number
CN113137805A
CN113137805A CN202110467045.XA CN202110467045A CN113137805A CN 113137805 A CN113137805 A CN 113137805A CN 202110467045 A CN202110467045 A CN 202110467045A CN 113137805 A CN113137805 A CN 113137805A
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CN
China
Prior art keywords
drawer
nitrogen concentration
nitrogen
concentration
vacuum pump
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CN202110467045.XA
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Chinese (zh)
Inventor
陈佳弘
郭琨
李信良
刘畅
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202110467045.XA priority Critical patent/CN113137805A/en
Publication of CN113137805A publication Critical patent/CN113137805A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments

Abstract

The invention discloses a gas concentration regulation and control method of a refrigerator and the refrigerator. Wherein, the method comprises the following steps: monitoring the nitrogen concentration in the drawer in a closed state of the drawer; executing a corresponding adjusting strategy according to the interval where the nitrogen concentration is located so as to adjust the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of an air-conditioned membrane in the adjustable air-conditioned membrane module; wherein, the vacuum pump is in an initial closed state, and the effective use area of the air-conditioned membrane is initially zero. According to the invention, the linkage control of the controlled atmosphere membrane and the oxygen reduction equipment (nitrogen-oxygen separation membrane component) can be realized according to the nitrogen concentration and the change condition in the drawer, and the nitrogen concentration in the drawer is adjusted to a proper range by controlling the opening and closing of the vacuum pump and adjusting the effective use area of the controlled atmosphere membrane, so that the nitrogen concentration in the drawer is more accurately adjusted and controlled, the optimal fruit and vegetable controlled atmosphere environment is realized, and the freshness of fruits and vegetables in the refrigerator is effectively ensured.

Description

Gas concentration regulation and control method for refrigerator and refrigerator
Technical Field
The invention relates to the technical field of refrigerators, in particular to a gas concentration regulation and control method of a refrigerator and the refrigerator.
Background
Along with the continuous improvement of living standard, the improvement of dietary structure, people's fresh degree and the fresh-keeping persistence of food to the fruit vegetables require more and more that not only the fruit vegetables can keep fresh in the sense organ, more require the nutrient substance of fruit vegetables can furthest remain, and nitrogen gas can help the fresh-keeping of fruit vegetables.
At present, the air-conditioning preservation technology can meet the requirements of people on the whole, and the air-conditioning film (oxygen and nitrogen are blocked) is arranged to keep the atmosphere of rich-nitrogen and poor-oxygen gas in the drawer of the refrigerator, so that the aim of preserving fruits and vegetables is fulfilled. However, according to the technical scheme, the adjustment of the nitrogen and the oxygen in the refrigerator can be realized only through the air-conditioning film, and the self-adaptive adjustment cannot be finely and accurately carried out according to the change of the nitrogen concentration in the refrigerator, so that a good fresh-keeping effect cannot be achieved.
Aiming at the problem of how to accurately regulate and control the nitrogen concentration in the refrigerator to ensure the fresh-keeping effect in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a gas concentration regulating method of a refrigerator and the refrigerator, and aims to solve the problem in the prior art that how to accurately regulate the concentration of nitrogen in the refrigerator so as to ensure the preservation effect.
In order to solve the technical problem, the invention provides a gas concentration regulation and control method of a refrigerator, wherein the method comprises the following steps: monitoring the nitrogen concentration in the drawer in a closed state of the drawer; executing a corresponding adjusting strategy according to the interval where the nitrogen concentration is located so as to adjust the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of an air-conditioned membrane in the adjustable air-conditioned membrane module; wherein the vacuum pump is initially in a closed state, and the effective use area of the air-conditioned membrane is initially zero; the nitrogen-oxygen separation membrane module comprises a vacuum pump and a nitrogen-oxygen separation membrane module arranged on the drawer, and the vacuum pump is used for pumping oxygen through the nitrogen-oxygen separation membrane module so as to improve the nitrogen concentration in the drawer; the adjustable modified atmosphere membrane assembly is arranged on the drawer and comprises a modified atmosphere membrane, and the modified atmosphere membrane is used for adjusting the oxygen concentration of the fresh-keeping space of the drawer relative to the external space.
Further, after executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located to adjust the opening and closing of the vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of the modified atmosphere membrane in the adjustable modified atmosphere membrane module, the method further comprises: monitoring the change of the nitrogen concentration in the drawer within a preset time period; and on the premise that the nitrogen concentration is in different intervals, executing corresponding adjustment strategies on the vacuum pump and the modified atmosphere membrane according to the change of the nitrogen concentration.
Furthermore, the interval where the nitrogen concentration is located is divided into a first interval, a second interval and a third interval; the nitrogen concentration is smaller than a first preset value in the first interval, the nitrogen concentration is smaller than a second preset value in the second interval, and the nitrogen concentration is larger than the second preset value in the third interval.
Further, executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located to adjust the opening and closing of the vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of the modified atmosphere membrane in the adjustable modified atmosphere membrane module, including:
if the nitrogen concentration is in the first interval, directly triggering and monitoring the change of the nitrogen concentration in the drawer within a preset time period;
if the nitrogen concentration is in the second interval, keeping the closing state of the vacuum pump and increasing the effective use area of the modified atmosphere film; then triggering and monitoring the change of the nitrogen concentration in the drawer within a preset time period;
if the nitrogen concentration is in the third interval, adjusting the controlled atmosphere membrane to be in a ventilation state and keeping the controlled atmosphere membrane for a preset time, then adjusting the controlled atmosphere membrane to be in a state before the ventilation state, then returning to monitoring the nitrogen concentration in the drawer, and executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located;
the adjustable modified atmosphere membrane component further comprises a vent hole and an adjusting piece, the vent hole is used for communicating a fresh-keeping space and an external space in the drawer, the adjusting piece is used for adjusting the effective using area of the modified atmosphere membrane and is also used for adjusting the opening and closing of the vent hole, and the vent hole is opened and is not shielded in the ventilation state.
Further, if the nitrogen concentration is in the first interval, executing a corresponding adjustment strategy on the vacuum pump and the modified atmosphere film according to the change of the nitrogen concentration, wherein the adjustment strategy comprises the following steps:
if the change in the nitrogen concentration is Δ CN2If yes, reminding a user to close the drawer, then returning to monitor the nitrogen concentration in the drawer closing state, and executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located;
if the change in the nitrogen concentration is Δ CN2If the concentration of the nitrogen in the current drawer is more than or equal to-k%, comparing the concentration of the nitrogen in the current drawer with a third preset value, and executing a corresponding adjustment strategy on the vacuum pump and the air-conditioned membrane according to a comparison result;
and k is a natural number, and the third preset value is smaller than the first preset value.
Further, comparing the nitrogen concentration in the current drawer with a third preset value, and executing a corresponding adjustment strategy on the vacuum pump and the modified atmosphere film according to the comparison result, wherein the adjustment strategy comprises the following steps:
if the concentration of the nitrogen in the current drawer is more than or equal to a third preset value, keeping the effective use area of the air-conditioning film to be zero; monitoring the change of the nitrogen concentration in the drawer within a preset time period, returning to monitor the nitrogen concentration in the drawer if the change of the nitrogen concentration is increased, executing a corresponding adjustment strategy according to an interval where the nitrogen concentration is located, starting the vacuum pump according to a first preset flow rate and maintaining the vacuum pump for a first preset time if the change of the nitrogen concentration is reduced or unchanged, returning to monitor the nitrogen concentration in the drawer, and executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located;
and if the concentration of the nitrogen in the current drawer is less than a third preset value, starting the vacuum pump according to a first preset flow rate and maintaining a second preset time, returning to monitor the concentration of the nitrogen in the drawer, and executing a corresponding adjustment strategy according to an interval where the concentration of the nitrogen is located.
Further, if the nitrogen concentration is in the second interval, executing a corresponding adjustment strategy on the vacuum pump and the modified atmosphere film according to the change of the nitrogen concentration, wherein the adjustment strategy comprises the following steps:
if the change of the nitrogen concentration is reduced, the effective use area of the modified atmosphere film is reduced;
if the change of the nitrogen concentration is unchanged, maintaining the current state of the modified atmosphere film;
if the change of the nitrogen concentration is increased, the effective use area of the modified atmosphere film is increased; and then starting the vacuum pump according to a second preset flow rate if the change of the nitrogen concentration is still increased.
Further, before monitoring the nitrogen concentration in the drawer closed state, the method further comprises the following steps: detecting whether the drawer is completely closed; if yes, triggering and monitoring the nitrogen concentration in the drawer; otherwise, prompting the user to close the drawer.
The present invention also provides a refrigerator, comprising:
the drawer is internally provided with a fresh-keeping space which is relatively isolated from air;
the nitrogen-oxygen separation membrane module comprises a nitrogen-oxygen separation membrane module and a vacuum pump, and the nitrogen-oxygen separation membrane module is arranged on the drawer and is used for separating nitrogen and oxygen; the vacuum pump is connected with the nitrogen-oxygen separation membrane module through an exhaust pipe and used for exhausting oxygen in the fresh-keeping space through the nitrogen-oxygen separation membrane module so as to improve the nitrogen concentration in the fresh-keeping space;
the adjustable controlled atmosphere membrane assembly is arranged on the drawer and comprises a controlled atmosphere membrane and an adjusting piece, the adjusting piece is used for adjusting the effective using area of the controlled atmosphere membrane, and the controlled atmosphere membrane is used for adjusting the oxygen concentration of the fresh-keeping space relative to the external space;
and the nitrogen concentration sensor is arranged in the drawer and used for monitoring the nitrogen concentration in the drawer.
Further, the adjustable gas regulating membrane component further comprises a vent hole, the vent hole is used for communicating the fresh-keeping space with the external space, and the adjusting piece is also used for adjusting the opening and closing of the vent hole.
Further, the adjustable modified atmosphere module comprises a substrate, the modified atmosphere film is mounted on the substrate, the vent hole is formed in the substrate, and the adjusting piece is movably arranged on the substrate to adjust the effective use area of the modified atmosphere film and/or adjust the opening and closing of the vent hole.
Further, the adjusting piece is a baffle plate, the baffle plate is slidably arranged on the base plate, and the baffle plate adjusts the effective use area of the modified atmosphere film and/or adjusts the opening and closing of the vent hole in a shielding/avoiding mode.
Further, in the vent state, the baffle plate moves to a position avoiding the vent hole.
The invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the program realizes the above-mentioned method when executed by a processor.
Compared with the traditional air-conditioned membrane drawer, the invention can realize linkage control of the air-conditioned membrane and the oxygen reduction equipment (nitrogen-oxygen separation membrane module) according to the nitrogen concentration and the change condition in the drawer, and adjust the nitrogen concentration in the drawer to a proper range by controlling the opening and closing of the vacuum pump and adjusting the effective use area of the air-conditioned membrane, thereby more accurately adjusting and controlling the nitrogen concentration in the drawer, realizing the optimal air-conditioned environment for fruits and vegetables and effectively ensuring the freshness of fruits and vegetables in the refrigerator.
Drawings
Fig. 1 is an overall structural schematic view of an embodiment of a refrigerator according to the present invention;
FIG. 2 is a schematic diagram of the structure of an adjustable modified atmosphere module of the refrigerator of FIG. 1;
FIG. 3 is a schematic structural view of a nitrogen-oxygen separation membrane module of the refrigerator of FIG. 1;
fig. 4 is a flowchart of a gas concentration regulating method of a refrigerator according to an embodiment of the present invention;
fig. 5 is a detailed flowchart of a gas concentration controlling method of a refrigerator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The invention provides a gas concentration regulation and control scheme, which can realize linkage control of a gas regulating membrane and oxygen reduction equipment (nitrogen-oxygen separation membrane module) according to the nitrogen concentration in a drawer, thereby ensuring that the nitrogen concentration in the drawer is in a proper range and achieving the aim of fruit and vegetable preservation. The structure of the refrigerator according to the present invention will be described first.
Compared with the traditional air-conditioning membrane drawer, the refrigerator is structurally provided with the oxygen reduction device (the nitrogen-oxygen separation membrane component) to realize active air conditioning, so that the nitrogen concentration in the drawer is adjusted. The drawer is also provided with the air-conditioning film, so that oxygen in the drawer can permeate the air-conditioning film to be in the air, the oxygen concentration in the drawer is adjusted, the nitrogen concentration in the drawer is changed at the same time when the oxygen concentration is changed, and passive air conditioning is realized.
Fig. 1 shows an embodiment of the refrigerator of the present invention, which comprises a drawer 10, a nitrogen-oxygen separation membrane module 20 and an adjustable modified atmosphere module 30. Wherein, a fresh-keeping space which is relatively isolated from air is formed in the drawer 10, the adjustable gas regulating membrane module 30 is arranged on the drawer 10, and the nitrogen-oxygen separation membrane module 20 is used for separating oxygen from the fresh-keeping space. The modified atmosphere module 30 comprises a modified atmosphere film 31 and a regulating member 32, wherein the regulating member 32 regulates the effective use area of the modified atmosphere film 31, and the modified atmosphere film 31 is used for regulating the oxygen concentration, the carbon dioxide concentration and the humidity of the fresh-keeping space relative to the external space. It should be noted that a nitrogen concentration sensor is further disposed in the drawer 10, and is used for monitoring the nitrogen concentration in the drawer. The specific installation position is not shown in fig. 1, and the embodiment is not limited, as long as the installation position is arranged inside the drawer, and the nitrogen concentration in the drawer can be accurately monitored.
By applying the technical scheme of the invention, oxygen can be separated from the fresh-keeping space through the nitrogen-oxygen separation membrane component 20, so that a nitrogen-rich and low-oxygen atmosphere is created in the fresh-keeping space, and the fresh-keeping of food materials such as fruits and vegetables is facilitated. The oxygen concentration in the fresh-keeping space can be finely adjusted through the air adjusting film 31, so that the nitrogen concentration in the fresh-keeping space is further influenced, and the nitrogen concentration is maintained in a proper range with a good fruit and vegetable fresh-keeping effect. In the use process of the fresh-keeping space, under the respiration action of food materials such as fruits and vegetables, the oxygen concentration in the fresh-keeping space is further reduced, and the nitrogen concentration is increased, so that the oxygen in the external space can be properly supplemented into the fresh-keeping space through the air adjusting film 31, the nitrogen concentration is correspondingly reduced, and the problem that the fresh-keeping effect of the fruits and vegetables cannot be effectively guaranteed due to the improper nitrogen concentration in the fresh-keeping space is solved. The effective use area of the modified atmosphere film 31 is adjusted through the adjusting piece 32, so that the adjusting effect of the modified atmosphere film 31 on the oxygen concentration in the fresh-keeping space can be adjusted, and the nitrogen concentration in the fresh-keeping space is further influenced.
In addition, it should be noted that the modified atmosphere film 31 can also maintain the humidity in the fresh-keeping space at a certain level, which is beneficial to keeping food materials such as fruits and vegetables fresh.
As shown in fig. 2, in the preferred embodiment, the adjustable gas-regulating membrane module 30 further includes a vent hole 33, the vent hole 33 is used for communicating the fresh-keeping space with the external space, and the adjusting member 32 is used for adjusting the opening and closing of the vent hole 33.
As shown in fig. 2, the damper 32 may optionally include a fully closed state, a modified atmosphere state, a modified fully open state, and a vent state. Wherein, in the fully closed state, the effective use area of the air adjusting film 31 is adjusted to be 0 percent, and the vent hole 33 is closed; in the air-conditioning adjusting state, the effective use area of the air-conditioning film 31 is adjusted to be 0-100%, and the vent hole 33 is closed; in the air-conditioning fully-opened state, the effective use area of the air-conditioning film 31 is adjusted to be 100%, and the vent hole 33 is closed; in the ventilation state, the ventilation hole 33 is opened.
In a preferred embodiment, the controlled atmosphere membrane 31 has an effective use area of 0% in the aeration state. As other alternative embodiments, it is also possible that no limitation on the effective usable area of the modified atmosphere film 31 is required after the vent hole 33 is opened in the venting state. It should be noted that, after the vent hole 33 is opened, the fresh food space and the external space are in a complete linkage state, so that the resistance to the flow of air is minimal, and thus the air flow preferentially passes through the vent hole 33.
As an alternative, in the solution of the present embodiment, the tunable gas atmosphere module 30 includes a substrate 34, the gas atmosphere film 31 is mounted on the substrate 34, the vent hole 33 is opened on the substrate 34, and the adjusting member 32 is movably disposed on the substrate 34 to adjust the effective use area of the gas atmosphere film 31 and/or adjust the opening and closing of the vent hole 33. When in use, the effective use area of the air-conditioning film 31 can be adjusted through the movable adjusting piece 32; the opening and closing of the ventilation hole 33 can also be regulated by the movable regulator 32.
As a preferred embodiment, as shown in fig. 2, the adjusting member 32 is a baffle plate, which is slidably disposed on the base plate 34 and is used for adjusting the effective use area of the modified atmosphere film 31 and/or adjusting the opening and closing of the vent hole 33 by shielding/avoiding. The control of the effective use area of the modified atmosphere film 31 and the control of the opening and closing of the vent hole 33 can be realized more conveniently by the design of the slidable baffle plate. When the effective use area of the air-conditioning film 31 needs to be adjusted, the baffle can selectively shield/avoid the action area of the air-conditioning film 31 and the fresh-keeping space or the external space; when the vent hole 33 needs to be opened, the baffle plate is made to avoid the vent hole 33, and when the vent hole 33 needs to be closed, the baffle plate is made to shield the vent hole 33.
Specifically, for several states of the adjusting member 32, in the fully closed state, the baffle plate moves to a position where it completely blocks the modified atmosphere film 31 and a position where it completely blocks the vent hole 33; in the modified atmosphere state, the baffle plate moves to a position for partially shielding the modified atmosphere film 31 and a position for completely shielding the vent hole 33; in the air-conditioning full-open state, the baffle plate moves to the position of avoiding the air-conditioning film 31 and the position of completely shielding the vent hole 33; in the ventilation state, the baffle plate moves to a position to escape the ventilation hole 33. As shown in fig. 2, the baffle plate can have two gears in the modified atmosphere state, and the effective area of the modified atmosphere film 31 is different under different gears. As other alternative embodiments, the damper may have more shift positions.
More preferably, in the technical solution of the present embodiment, the tunable gas atmosphere module 30 further includes a slide rail 35, the slide rail 35 is installed on the base plate 34, and the baffle is slidably installed on the slide rail 35. Through the cooperation of slide rail 35 and baffle, can let the gliding more smooth and easy of baffle.
As shown in fig. 3, in the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 20 includes a nitrogen-oxygen separation membrane module 21 and a vacuum pump 22, the nitrogen-oxygen separation membrane module 21 is used for separating nitrogen and oxygen, the vacuum pump 22 is connected to the nitrogen-oxygen separation membrane module 21 through an exhaust pipe 23, and the vacuum pump 22 exhausts oxygen from the fresh-keeping space through the nitrogen-oxygen separation membrane module 21. As shown in fig. 1, when using, the nitrogen-oxygen separation membrane module 21 is disposed in the fresh-keeping space, the vacuum pump 22 can be disposed outside the fresh-keeping space, the vacuum pump 22 acts on the nitrogen-oxygen separation membrane module 21 through the exhaust tube 23, the nitrogen-oxygen separation membrane module 21 only allows oxygen to pass through, and nitrogen remains in the fresh-keeping space, and the oxygen separated by the nitrogen-oxygen separation membrane module 21 is discharged to the external space through the exhaust tube 23 and the vacuum pump 22.
Optionally, the nitrogen-oxygen separation membrane module 21 is at least partially disposed within the fresh food space, and the vacuum pump 22 is disposed within the drawer 10 or outside the drawer 10. Optionally, in the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 21 is at least partially disposed inside the fresh-keeping space, and the vacuum pump 22 may be disposed outside the drawer 10. Wherein, at least one side of the nitrogen-oxygen separation membrane module 21 blocking nitrogen circulation should be ensured to be positioned in the drawer 10 when in use, and it is also feasible that the whole nitrogen-oxygen separation membrane module 21 is positioned in the drawer 10. The vacuum pump 22 is arranged outside the drawer 10 and connected with the nitrogen-oxygen separation membrane module 21 through the exhaust tube 23, and the position of the vacuum pump 22 can be a position adjacent to the drawer 10, or a position far away from the drawer 10, such as a refrigerator liner or a compressor bin, as long as the vacuum pump is connected with the nitrogen-oxygen separation membrane module 21 through the exhaust tube 23. Alternatively, the vacuum pump 22 may be disposed within the drawer 10 such that the vacuum pump 22 exhausts oxygen from the drawer 10 through an exhaust pipe.
More preferably, as shown in fig. 3, the nitrogen and oxygen separation membrane module 20 includes a wind power part 24, and the wind power part 24 is provided at the nitrogen and oxygen separation membrane module 21. When in use, the wind power component 24 can make the air at the nitrogen-oxygen separation membrane module 21 circulate to prevent the nitrogen from gathering, and can also improve the separation efficiency of the nitrogen-oxygen separation membrane module 20 to the oxygen in the fresh-keeping space.
As an alternative embodiment, the wind power unit 24 is a fan mounted on the nitrogen-oxygen separation membrane module 21. Preferably, the number of the fans is two, and the two fans are arranged on the nitrogen-oxygen separation membrane module 21 in parallel, so that the air circulation efficiency in the fresh-keeping space is improved. As a further alternative, the wind member 24 may also be a ventilation board that is movable to circulate the air flow.
In the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 21 includes a plurality of stacked nitrogen-oxygen separation membranes 211 therein, and the exhaust tube 23 is respectively communicated with the oxygen filtration sides of the plurality of nitrogen-oxygen separation membranes 211.
It should be noted that the oxygen reduction principle of the nitrogen-oxygen separation membrane 211 is dissolution-diffusion, oxygen and nitrogen have different dissolution rates and passing rates on the nitrogen-oxygen separation membrane 211, and under the pushing of the vacuum pressure of the vacuum pump 22, oxygen can more easily permeate through the nitrogen-oxygen separation membrane and be discharged at the oxygen-rich end, thereby achieving the effect of rapid oxygen reduction.
The modified atmosphere film 31 is a polymer film, and can perform molecular diffusion movement according to the concentration difference of gas inside and outside the film under normal pressure, and oxygen and carbon dioxide have different permeation rates, as shown in table 1 below. When the nitrogen concentration in the fresh-keeping space is proper, the permeation amount of oxygen is different according to the adjustment of the effective use area of the air adjusting film 31, so that the nitrogen concentration in the fresh-keeping space is influenced, and the effect of relatively stabilizing the nitrogen concentration in the fresh-keeping space is realized.
TABLE 1
Figure BDA0003044585800000091
Example 2
Based on the preservation refrigerator introduced in the above embodiments, the embodiment provides a gas concentration regulation and control scheme of the refrigerator. Fig. 4 is a flowchart of a gas concentration controlling method of a refrigerator according to an embodiment of the present invention, as shown in fig. 4, the method including the steps of:
step S401, monitoring the nitrogen concentration in the drawer closing state;
step S402, executing a corresponding adjusting strategy according to the interval where the nitrogen concentration is located so as to adjust the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of an air-conditioned membrane in the adjustable air-conditioned membrane module; wherein, the vacuum pump is in the initial closed state, and the effective use area of the air-conditioned membrane is initially zero.
In the embodiment, before monitoring the nitrogen concentration in the drawer, whether the drawer is completely closed needs to be detected; if yes, triggering and monitoring the nitrogen concentration in the drawer; otherwise, prompting the user to close the drawer, and monitoring the nitrogen concentration in the drawer after ensuring the drawer to be closed. Thereby ensuring the regulation and control effect of the regulation and control scheme of the nitrogen concentration in the drawer.
This embodiment can set up different velocity of flow according to the demand after the vacuum pump opens when specific application, can set up two or more gears with the vacuum pump, for example high gear, middle gear, low gear, and middle gear can be one or more gears, and the gear is higher, and the flow of vacuum pump is higher, helps the rising of nitrogen gas concentration in the fresh-keeping space. Similarly, the modified atmosphere film can also be provided with two or more gears, such as: a high gear (which may correspond to the modified full open state of the above-described embodiment), a middle gear (which may correspond to the modified state of the above-described embodiment), and a low gear (which may correspond to the fully closed state of the above-described embodiment), where the middle gear may be one or more gears. The higher the shift is, the larger the effective use area of the modified atmosphere film is, and the higher the oxygen transmittance through the modified atmosphere film is.
In this embodiment, the interval in which the nitrogen concentration is located may be divided into a first interval, a second interval, and a third interval; wherein the first interval is: the nitrogen concentration is less than a first preset value, and a second interval is as follows: the first preset value is not less than the nitrogen concentration and not more than the second preset value, and the third interval is as follows: the nitrogen concentration is larger than a second preset value. Wherein, the second interval is comparatively suitable for storing the vegetables and fruits, and the fresh nitrogen concentration interval of vegetables and fruits is guaranteed.
After determining the interval of the nitrogen concentration, a corresponding adjustment strategy may be performed. In order to further ensure the fresh-keeping effect of the refrigerator, after the adjustment strategy is executed, the change of the nitrogen concentration in the drawer in the preset time period can be monitored, and on the premise that the nitrogen concentration is in different intervals, the corresponding adjustment strategy is executed on the vacuum pump and the controlled atmosphere film according to the change of the nitrogen concentration. The specific introduction is as follows:
(1) if the nitrogen concentration is in the first interval, the nitrogen concentration in the drawer is relatively low, at the moment, the change of the nitrogen concentration in the drawer in a preset time period needs to be further monitored, and a corresponding adjustment strategy is executed according to the change of the nitrogen concentration.
a. If the change in nitrogen concentration is Δ CN2And k%, the nitrogen concentration in the drawer is continuously reduced, the change degree is large, the drawer is opened by a user in a large probability condition, air enters the drawer at the moment, the nitrogen concentration is reduced, and the opening and closing state of the drawer needs to be confirmed again at the moment to remind the user to close the drawer. The change of the nitrogen concentration tends to be stable after the drawer is closed, and then the process returns to the step S401. The k is a natural number, and is generally a value within a range of 0 to 10, and may be 4, for example. The third preset value is smaller than the first preset value.
b. If the change in nitrogen concentration is Δ CN2And when the change of the nitrogen concentration in the drawer is larger than or equal to-k%, the nitrogen concentration in the drawer at present needs to be compared with a third preset value, and a corresponding adjustment strategy is executed on the vacuum pump and the air-conditioned membrane according to a comparison result.
b1. If the concentration of the nitrogen in the current drawer is larger than or equal to the third preset value, the drawer is not coveredOpening, only because the nitrogen concentration drops because the fruit vegetables mismatch in gas-regulating membrane and the drawer, need keep the effective usable floor area of gas-regulating membrane at this moment for zero, promote the nitrogen concentration in the drawer to rise. Then, the change of the nitrogen concentration in the drawer in a preset time period is monitored, and if the change of the nitrogen concentration is increased, delta CN2If the concentration of nitrogen gas is higher than 0, the modified atmosphere film is effective, and the nitrogen gas concentration is slowly increased to the appropriate concentration, and the step S401 is executed again. If the nitrogen concentration is reduced or unchanged, i.e. Δ CN2And ≦ 0, which indicates that the controlled atmosphere membrane cannot increase the nitrogen concentration, and at this time, the vacuum pump needs to be started to assist in increasing the nitrogen and decreasing the oxygen, so the vacuum pump is started at the first preset flow rate and maintained for the first preset time (for example, 30-40min), and then the above step S401 is executed.
It should be noted that, at this time, the nitrogen concentration is lower, and in order to raise the nitrogen concentration as soon as possible, the first preset flow rate may be set higher, for example, the high level of the vacuum pump is turned on, and the corresponding flow rate may be set to 6L/min.
b2. If the concentration of the nitrogen in the current drawer is less than the third preset value, the drawer is just opened, and the vacuum pump needs to be started to increase the concentration of the nitrogen to a proper range. Therefore, the vacuum pump is turned on at the first preset flow rate for a second preset time period (which may be 30-40min, for example), and then the step S401 is executed again.
(2) If the nitrogen concentration is in the second interval, the nitrogen concentration in the drawer is proper and is the target storage concentration of the fruits and vegetables. The closing state of the vacuum pump can be kept continuously, and the effective use area of the modified atmosphere film can be properly increased in order to ensure the gas interaction inside and outside the drawer, for example, the effective use area S of the modified atmosphere film is adjusted to the whole area S of the modified atmosphere film0Half of that. And then, monitoring the change of the nitrogen concentration in the drawer within a preset time period, and executing a corresponding adjustment strategy on the vacuum pump and the controlled atmosphere membrane according to the change of the nitrogen concentration. The purpose is to prevent the nitrogen concentration from deviating from the target storage concentration. In particular, the amount of the solvent to be used,
a. if the change of the nitrogen concentration is reduced, which means that the oxygen concentration in the drawer is increased, the effective use area of the modified atmosphere film is reduced to reduce the oxygen concentration in the drawer, and accordingly, the nitrogen concentration is increased. Then, if the change of the nitrogen concentration is still reduced, which indicates that the adjustment of the modified atmosphere film cannot prevent the continuous reduction of the nitrogen concentration, the vacuum pump needs to be started to increase the nitrogen concentration in an auxiliary manner, and the vacuum pump can be started according to a second preset flow rate.
It should be noted that, at this time, although the nitrogen concentration is lower, the difference between the nitrogen concentration and the target storage concentration is not large, so the second preset flow rate may be set to be lower, for example, the low gear of the vacuum pump is turned on, and the corresponding flow rate may be set to be 2L/min. That is, the second predetermined flow rate is smaller than the first predetermined flow rate.
b. If the change of the nitrogen concentration is unchanged, the current state of the modified atmosphere film is continuously maintained without intervention.
c. If the change in nitrogen concentration is an increase, indicating a decrease in oxygen concentration in the drawer, the effective usable area of the modified atmosphere membrane is increased, e.g., the effective usable area S of the modified atmosphere membrane is adjusted to be equal to the total area S of the modified atmosphere membrane0To increase the oxygen concentration in the drawer, and correspondingly, the nitrogen concentration is decreased.
(3) If the nitrogen concentration is in the third interval, which indicates that the nitrogen concentration is too high at this time, the storage of fruits and vegetables is adversely affected, because the nitrogen concentration is too high due to the mismatch between the fruits and vegetables in the drawer and the modified atmosphere film, at this time, the drawer needs to be opened for timely ventilation, so that the modified atmosphere film can be adjusted to a ventilation state and kept for a preset time (for example, 2-10 min), and then, in order to avoid too large change of the nitrogen concentration due to long-time ventilation, the modified atmosphere film is adjusted to a state before the ventilation state, and then, the step S401 is executed again.
The adjustable gas regulating membrane component comprises a vent hole and a regulating part, the vent hole is used for communicating the fresh-keeping space and the external space in the drawer, the regulating part is also used for regulating the opening and closing of the vent hole, and the vent hole is opened in a ventilation state and is not shielded.
Example 3
The technical solution of the present invention is described in detail below with reference to the specific embodiments and the accompanying drawings. Fig. 5 is a detailed flowchart of a gas concentration control method of a refrigerator according to an embodiment of the present invention, as shown in fig. 5, the flowchart includes the following steps:
and S501, opening the air conditioning function according to the requirement by the user.
Step S502, whether the drawer is tightly closed or not is identified.
And step S503, if the drawer is not tightly closed, prompting the user to tightly close the drawer.
Step S504, if the drawer is tightly closed, the vacuum pump is in an initial closed state, and the effective use area of the air-conditioned membrane is initially zero. Then identifying the nitrogen concentration C in the drawer through a nitrogen concentration sensorN2。
In this embodiment, the vacuum pump is provided with two stages according to the flow rate, i.e., L1 stage and L2 stage, and the flow rate is L1 < L2, for example, L1 is 2L/min and L2 is 6L/min. The modified atmosphere film is provided with three stages according to the effective use area, namely S1 stage, S2 stage and S3 stage, and the effective use area is S1 < S2 < S3, for example, S1 is 0, S2 is 1/2S0，S3＝S0，S0Is the whole area of the modified atmosphere film.
Step S505, the drawer is provided with CN2If < 95%, further judging Δ CN2Whether or not it is less than-4%.
In addition, C isN2The nitrogen concentration is represented, 95-98% is the nitrogen concentration range suitable for storing fruits and vegetables, and the delta C isN2For the value of the change, Δ C, of the nitrogen concentration in the drawer over a predetermined period of time (e.g. 10min)N2＝Cb-CaIn which C isbIs the current nitrogen concentration, CaNitrogen concentration before 10 min. Delta C N20 denotes no change in nitrogen concentration,. DELTA.CN2> 0 denotes an increase in nitrogen concentration,. DELTA.CN2< 0 indicates that the nitrogen concentration decreased.
Step S506, monitoring the delta CN2< -4%, the process returns to step S502.
Step S507, monitoring the delta CN2More than or equal to-4%, the current nitrogen concentration C is monitoredN2Judgment of CN2Whether it is less than 82%.
Step S508, monitoring CN2Greater than or equal to 82%, this is guaranteedThe effective use area of the controlled atmosphere film is S1 grade, namely S1 is 0.
Step S509, determine Δ CN2If Δ C isN2If > 0, return to execute step S504, if Δ CN2And (5) if the speed is less than or equal to 0, starting the vacuum pump, adjusting to the L2 gear, keeping for 30-40min, and then returning to execute the step S504.
Step S510, monitoring CN2If the speed is less than 82%, the vacuum pump is started, the gear is adjusted to the L2 and kept for 30-40min, and then the step S504 is executed in a returning mode.
To this end, CN2The corresponding adjustment strategies in the case of < 95% have been fully described. In general, CN2< 95% of cases, Δ CN2-4%, that the nitrogen concentration is reduced and the change degree is large indicates that the drawer is opened by the user in a large probability condition, the drawer enters air at the moment, the nitrogen concentration is reduced, and that the drawer state needs to be confirmed again at the moment to remind the user to close the drawer.
The nitrogen concentration tends to be stable after the drawer is closed, and C is obtained at the momentN2＜95％，△CN2Not less than-4%, two cases occur at this time:
when C is presentN2< 82%, it means that the vacuum pump needs to be started to raise the nitrogen concentration to 95% -98% just after the drawer is opened.
When C is presentN2Not less than 82 percent, the drawer is not opened, only the nitrogen concentration is reduced because the air-conditioned membrane is not matched with fruits and vegetables in the drawer, at the moment, the effective use area of the air-conditioned membrane needs to be adjusted to be 0, the increase of the nitrogen concentration in the drawer is promoted, and the delta C is judgedN2If the concentration is more than 0, the effect of the gas regulating membrane is shown, the nitrogen can slowly rise to the proper concentration, and the Delta C is shownN2And (3) less than or equal to 0, which indicates that the nitrogen concentration cannot be increased by the air-conditioning film, and at the moment, a vacuum pump needs to be started to assist in increasing the nitrogen and reducing the oxygen.
Step S511, the drawer CN2And (3) adjusting the modified atmosphere membrane to be in an aeration state when the concentration is more than 98 percent. Meanwhile, in order to reduce the nitrogen concentration more quickly, a user can be reminded to open the drawer for a few seconds and then close the drawer, and if the user is not near the refrigerator, the air-conditioning film is only adjusted to be in a ventilation state.
CN2＞9Under the condition of 8%, the nitrogen concentration is too high at the moment, the storage of fruits and vegetables is adversely affected, the nitrogen concentration in the drawer is too high due to the fact that the fruits and vegetables in the drawer are not matched with the controlled atmosphere film, the drawer needs to be opened for timely ventilation at the moment, the controlled atmosphere film is adjusted to a ventilation state, the ventilation hole is opened on the controlled atmosphere film in the ventilation state, and the original use state of the controlled atmosphere film is recovered after 2-10 min. The nitrogen concentration is now reduced to approximately 80%.
Step S512, C in the drawer is more than or equal to 95%N2Less than or equal to 98 percent, the vacuum pump is kept closed, and the effective use area of the air-conditioned membrane is adjusted to S2 grade, namely S2-1/2S0。
Step S513, monitoring the delta CN2If the effective use area of the modified atmosphere film is less than 0, the effective use area of the modified atmosphere film is adjusted to S1 level, namely S1 is 0.
Step S514, monitoring the delta CN2Adjusting the effective use area of the modified atmosphere film to S2 grade (S2-1/2S)0。
Step S515, monitoring the delta CN2If the effective use area of the modified atmosphere film is more than 0, the effective use area of the modified atmosphere film is adjusted to S3 level, namely S3 is S0。
Step S516, after a period of time, if Δ CN2If not, the current state is maintained, and then the step S504 is executed.
Step S517, after a period of time if it is still Δ CN2If the gear is less than 0, the vacuum pump is started and is adjusted to the L1 gear. And then returns to perform step S504.
So far, C is more than or equal to 95 percentN2The corresponding adjustment strategies under the condition of less than or equal to 98 percent are completely introduced. C is more than or equal to 95 percentN2The target storage concentration of the fruits and vegetables is less than or equal to 98 percent. At the moment, the vacuum pump is kept closed, and the effective use area of the modified atmosphere film is adjusted to 1/2S0According to Δ CN2The effective use area of the modified atmosphere film and the flow rate of the vacuum pump were adjusted in order to prevent the nitrogen concentration from deviating from the target storage concentration. If the nitrogen concentration is increased, the oxygen concentration is reduced, the area of the modified atmosphere membrane is increased to increase the oxygen concentration, and correspondingly, the nitrogen concentration is reduced. If the nitrogen concentration decreases, indicating an increase in oxygen concentration, the area of the modified atmosphere membrane is decreased to decrease the oxygen concentration, and correspondingly, the nitrogen concentrationThe concentration will increase. The nitrogen concentration is unchanged, and the existing air-conditioning membrane state is maintained. When the nitrogen concentration can not be prevented from continuously decreasing by adjusting the modified atmosphere film, a vacuum pump needs to be started to assist in increasing the nitrogen concentration.
It should be noted that, each value in this embodiment is only an exemplary illustration, and may be adaptively modified and adjusted in specific implementation. In the embodiment, the nitrogen concentration in the drawer is identified by the nitrogen concentration sensor in the drawer, and the opening and closing and the flow rate of the vacuum pump are controlled and the effective use area of the modified atmosphere film is adjusted according to the difference of the nitrogen concentration and the variation trend of the concentration. So as to ensure that the fruits and vegetables are in a suitable gas environment, and has important application value.
Example 4
The embodiment of the present invention provides software for implementing the technical solutions described in the above embodiments and preferred embodiments.
The embodiment of the invention provides a nonvolatile computer storage medium, wherein a computer executable instruction is stored in the computer storage medium and can execute a gas concentration regulation and control method of a refrigerator in any method embodiment.
The storage medium stores the software, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (14)

1. A gas concentration regulation method of a refrigerator is characterized by comprising the following steps:
monitoring the nitrogen concentration in the drawer in a closed state of the drawer;
executing a corresponding adjusting strategy according to the interval where the nitrogen concentration is located so as to adjust the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of an air-conditioned membrane in the adjustable air-conditioned membrane module; wherein the vacuum pump is initially in a closed state, and the effective use area of the air-conditioned membrane is initially zero;
the nitrogen-oxygen separation membrane module comprises a vacuum pump and a nitrogen-oxygen separation membrane module arranged on the drawer, and the vacuum pump is used for pumping oxygen through the nitrogen-oxygen separation membrane module so as to improve the nitrogen concentration in the drawer; the adjustable modified atmosphere membrane assembly is arranged on the drawer and comprises a modified atmosphere membrane, and the modified atmosphere membrane is used for adjusting the oxygen concentration of the fresh-keeping space of the drawer relative to the external space.
2. The method according to claim 1, wherein after the corresponding adjustment strategy is executed according to the interval where the nitrogen concentration exists to adjust the opening and closing of the vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of the modified atmosphere membrane in the modified atmosphere membrane module, the method further comprises:
monitoring the change of the nitrogen concentration in the drawer within a preset time period;
and on the premise that the nitrogen concentration is in different intervals, executing corresponding adjustment strategies on the vacuum pump and the modified atmosphere membrane according to the change of the nitrogen concentration.
3. The method according to claim 2, wherein the nitrogen concentration is in a first interval, a second interval and a third interval; wherein the first interval is: the nitrogen concentration is less than a first preset value, and the second interval is as follows: the nitrogen concentration is less than or equal to a second preset value, and the third interval is as follows: the nitrogen concentration is greater than the second preset value.
4. The method of claim 3, wherein executing a corresponding adjustment strategy according to the interval of the nitrogen concentration to adjust the opening and closing of the vacuum pump in the nitrogen-oxygen separation membrane module and the effective use area of the modified atmosphere membrane in the modified atmosphere membrane module comprises:
if the nitrogen concentration is in the first interval, directly triggering and monitoring the change of the nitrogen concentration in the drawer within a preset time period;
if the nitrogen concentration is in the second interval, keeping the closing state of the vacuum pump and increasing the effective use area of the modified atmosphere film; then triggering and monitoring the change of the nitrogen concentration in the drawer within a preset time period;
if the nitrogen concentration is in the third interval, adjusting the controlled atmosphere membrane to be in a ventilation state and keeping the controlled atmosphere membrane for a preset time, then adjusting the controlled atmosphere membrane to be in a state before the ventilation state, then returning to monitoring the nitrogen concentration in the drawer, and executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located;
the adjustable modified atmosphere membrane component further comprises a vent hole and an adjusting piece, the vent hole is used for communicating a fresh-keeping space and an external space in the drawer, the adjusting piece is used for adjusting the effective using area of the modified atmosphere membrane and is also used for adjusting the opening and closing of the vent hole, and the vent hole is opened and is not shielded in the ventilation state.
5. The method of claim 3, wherein if the nitrogen concentration is in the first interval, performing a corresponding adjustment strategy for the vacuum pump and the modified atmosphere membrane according to the change in the nitrogen concentration comprises:
if the change in the nitrogen concentration is Δ CN2If yes, reminding a user to close the drawer, then returning to monitor the nitrogen concentration in the drawer closing state, and executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located;
if the change in the nitrogen concentration is Δ CN2If the concentration of the nitrogen in the current drawer is more than or equal to-k%, comparing the concentration of the nitrogen in the current drawer with a third preset value, and executing a corresponding adjustment strategy on the vacuum pump and the air-conditioned membrane according to a comparison result;
and k is a natural number, and the third preset value is smaller than the first preset value.
6. The method of claim 5, wherein comparing the current nitrogen concentration in the drawer with a third preset value, and performing a corresponding adjustment strategy for the vacuum pump and the modified atmosphere film according to the comparison result comprises:
if the concentration of the nitrogen in the current drawer is more than or equal to a third preset value, keeping the effective use area of the air-conditioning film to be zero; monitoring the change of the nitrogen concentration in the drawer within a preset time period, returning to monitor the nitrogen concentration in the drawer if the change of the nitrogen concentration is increased, executing a corresponding adjustment strategy according to an interval where the nitrogen concentration is located, starting the vacuum pump according to a first preset flow rate and maintaining the vacuum pump for a first preset time if the change of the nitrogen concentration is reduced or unchanged, returning to monitor the nitrogen concentration in the drawer, and executing a corresponding adjustment strategy according to the interval where the nitrogen concentration is located;
and if the concentration of the nitrogen in the current drawer is less than a third preset value, starting the vacuum pump according to a first preset flow rate and maintaining a second preset time, returning to monitor the concentration of the nitrogen in the drawer, and executing a corresponding adjustment strategy according to an interval where the concentration of the nitrogen is located.
7. The method of claim 3, wherein if the nitrogen concentration is in the second interval, performing a corresponding adjustment strategy for the vacuum pump and the modified atmosphere membrane according to the change in the nitrogen concentration comprises:
if the change of the nitrogen concentration is reduced, the effective use area of the controlled atmosphere film is reduced, and then if the change of the nitrogen concentration is still reduced, the vacuum pump is started according to a second preset flow rate;
if the change of the nitrogen concentration is unchanged, maintaining the current state of the modified atmosphere film;
and if the change of the nitrogen concentration is increased, the effective use area of the modified atmosphere membrane is increased.
8. The method of claim 1, further comprising, prior to monitoring the nitrogen concentration within the drawer in the drawer closed state:
detecting whether the drawer is completely closed;
if yes, triggering and monitoring the nitrogen concentration in the drawer;
otherwise, prompting the user to close the drawer.
9. A refrigerator, characterized by comprising:
the drawer is internally provided with a fresh-keeping space which is relatively isolated from air;
the nitrogen-oxygen separation membrane module comprises a nitrogen-oxygen separation membrane module and a vacuum pump, and the nitrogen-oxygen separation membrane module is arranged on the drawer and is used for separating nitrogen and oxygen; the vacuum pump is connected with the nitrogen-oxygen separation membrane module through an exhaust pipe and used for exhausting oxygen in the fresh-keeping space through the nitrogen-oxygen separation membrane module so as to improve the nitrogen concentration in the fresh-keeping space;
the adjustable controlled atmosphere membrane assembly is arranged on the drawer and comprises a controlled atmosphere membrane and an adjusting piece, the adjusting piece is used for adjusting the effective using area of the controlled atmosphere membrane, and the controlled atmosphere membrane is used for adjusting the oxygen concentration of the fresh-keeping space relative to the external space;
and the nitrogen concentration sensor is arranged in the drawer and used for monitoring the nitrogen concentration in the drawer.
10. The refrigerator of claim 9, wherein the adjustable gas regulating membrane module further comprises a vent for communicating the fresh-keeping space with the external space, and the adjusting member is further configured to adjust the opening and closing of the vent.
11. The refrigerator of claim 10, wherein the tunable gas regulating membrane assembly comprises a base plate on which the gas regulating membrane is mounted, the vent opening in the base plate, and the adjusting member is movably disposed on the base plate to adjust an effective use area of the gas regulating membrane and/or to adjust opening and closing of the vent.
12. The refrigerator of claim 11, wherein the adjusting member is a baffle plate slidably disposed on the base plate, and the baffle plate is configured to adjust an effective use area of the modified atmosphere film and/or adjust opening and closing of the vent hole in a shielding/avoiding manner.
13. The refrigerator according to claim 12,
in the vent state, the baffle plate moves to a position avoiding the vent hole.
14. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 8.
CN202110467045.XA 2021-04-28 2021-04-28 Gas concentration regulation and control method for refrigerator and refrigerator Pending CN113137805A (en)

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Application publication date: 20210720