CN113834253A - Fresh-keeping refrigerator and control method thereof - Google Patents

Fresh-keeping refrigerator and control method thereof Download PDF

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Publication number
CN113834253A
CN113834253A CN202111100871.7A CN202111100871A CN113834253A CN 113834253 A CN113834253 A CN 113834253A CN 202111100871 A CN202111100871 A CN 202111100871A CN 113834253 A CN113834253 A CN 113834253A
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China
Prior art keywords
oxygen
nitrogen
membrane module
fresh
separation membrane
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CN202111100871.7A
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Chinese (zh)
Inventor
刘畅
程星光
焦雯姝
陈佳弘
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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 CN202111100871.7A priority Critical patent/CN113834253A/en
Publication of CN113834253A publication Critical patent/CN113834253A/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
    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/045—Air flow control arrangements
    • 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
    • F25D17/08—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 using ducts
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention discloses a fresh-keeping refrigerator and a control method thereof, wherein the fresh-keeping refrigerator comprises: the sealed drawer is internally provided with a fresh-keeping space which is relatively isolated from air; a gas conditioning assembly comprising: the oxygen-enriched membrane component is used for separating oxygen from the fresh-keeping space; the nitrogen-rich membrane component is used for filling nitrogen into the fresh-keeping space. The invention solves the problem that the active air conditioning in the prior art is difficult to realize the expected oxygen concentration in the fresh-keeping box, effectively reduces the oxygen in the fresh-keeping space and prolongs the fresh-keeping time of fruits and vegetables.

Description

Fresh-keeping refrigerator and control method thereof
Technical Field
The invention relates to the technical field of refrigerators, in particular to a fresh-keeping refrigerator and a control method thereof.
Background
The refrigerator becomes one of the household appliances necessary for each family, and with the improvement of living standard and purchasing power of people, the requirement for keeping food fresh is higher and higher. At present, the controlled atmosphere preservation technology is a technology with a wide application range in the field of fruit and vegetable preservation, and inhibits the respiration of fruits and vegetables and delays the metabolic process by controlling parameters such as temperature, humidity, carbon dioxide, oxygen concentration, ethylene concentration and the like in a storage environment, so that the fruits and vegetables are in a dormant state, the fruits and vegetables are prevented from being rotted and deteriorated, and the storage period is prolonged.
At present, the controlled atmosphere preservation technology for fruits and vegetables is divided into active controlled atmosphere and passive controlled atmosphere. The passive air conditioning reduces the oxygen concentration in the fresh-keeping space by means of the respiratory metabolism of fruits and vegetables, and the oxygen is slowly reduced in the mode, and the reduction range of the oxygen concentration is small and can be reduced to about 19% at least generally. The active air conditioning is to reduce oxygen in the fresh-keeping space by an artificial method to achieve the purpose of oxygen reduction and fresh keeping, and the oxygen reduction rate of the mode is obviously higher than that of the passive air conditioning.
Generally, active air conditioning reduces oxygen in the environment through a vacuum pump and an air conditioning film, however, in the process of extracting oxygen in a fresh-keeping space, the pressure in the fresh-keeping space is reduced, air outside the fresh-keeping space enters the space through the air conditioning film under the action of the pressure difference between the inside and the outside, so that after the oxygen in the fresh-keeping space is reduced to a certain concentration, an air extracting device continues to work, the oxygen is not reduced, the concentration of the general oxygen is reduced to about 17%, and the optimal oxygen concentration for air conditioning preservation of fruits and vegetables is generally about 5% or even lower.
Aiming at the problem that the active air conditioning in the related technology is difficult to realize the expected oxygen concentration in the preservation box, no effective solution is provided at present.
Disclosure of Invention
The invention provides a preservation refrigerator and a control method thereof, which at least solve the problem that the active air conditioning in the prior art is difficult to realize the expected oxygen concentration in the preservation refrigerator.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a freshness refrigerator including:
the sealed drawer 10 is provided with a fresh-keeping space which is relatively isolated from air in the sealed drawer 10;
a gas conditioning assembly comprising: the oxygen-enriched membrane component 20 is used for separating oxygen from the fresh-keeping space; the nitrogen-rich membrane module 40 and the oxygen-rich membrane module 40 are used for filling nitrogen into the fresh-keeping space.
Further, the oxygen-enriched membrane module 20 includes: an oxygen separation membrane module 21 for separating oxygen; the nitrogen-rich membrane module 40 includes: and a nitrogen separation membrane module 41 for separating nitrogen.
Further, the gas conditioning assembly further comprises: a vacuum pump 50 including an exhaust pipe 51 and an exhaust pipe 52; wherein, exhaust tube 51 includes the first branch road of bleeding and the second branch road of bleeding, and blast pipe 52 includes the first branch road of bleeding and the second branch road of bleeding, and the first branch road of bleeding links to each other with oxygen separation membrane module 21, and the second branch road of bleeding links to each other with nitrogen gas separation membrane module 41, and the first branch road of bleeding links to each other with the atmosphere, and the second branch road of bleeding links to each other with sealed drawer 10.
Further, the gas conditioning assembly further comprises:
a first switch valve 511 positioned in the first pumping branch;
a second switch valve 512 located in the second pumping branch;
a third on/off valve 521 located in the first exhaust branch;
and a fourth switching valve 522 located in the second exhaust branch.
Further, the oxygen enrichment membrane module 20 includes a first wind power part 22, the first wind power part 22 being provided at the oxygen separation membrane module 21 for circulating air at the oxygen separation membrane module 21 to prevent nitrogen from being accumulated;
the nitrogen-rich membrane module 40 includes a second wind member 42, and the second wind member 42 is provided at the nitrogen separation membrane module 41 for circulating air at the nitrogen separation membrane module 41 to prevent oxygen from being accumulated.
Further, the first wind power part 22 is a fan installed on the oxygen separation membrane module 21; the second wind power part 42 is a fan installed on the nitrogen separation membrane module 41; wherein, the fan is two fans arranged in parallel.
Further, the gas conditioning assembly further comprises: the adjustable modified atmosphere module 30 is arranged on the sealed drawer 10, the adjustable modified atmosphere module 30 comprises a modified atmosphere film 31 and an adjusting piece 32, the adjusting piece 32 adjusts the effective using area of the modified atmosphere film 31, and the modified atmosphere film 31 is used for adjusting the oxygen concentration and the carbon dioxide concentration of the fresh-keeping space relative to the external space.
Further, still include: the oxygen detection module 60 is arranged in the sealed drawer 10 and is used for detecting the oxygen concentration in the sealed drawer 10; and the nitrogen detection module 70 is arranged in the sealed drawer 10 and is used for detecting the nitrogen concentration in the sealed drawer 10.
According to another aspect of the embodiments of the present invention, there is provided a method for controlling a preservation refrigerator, which is applied to the preservation refrigerator; the method comprises the following steps:
acquiring the variety of food materials stored in the sealed drawer;
determining corresponding target oxygen concentration according to the food material types;
the operation of the gas conditioning assembly is controlled in accordance with the target oxygen concentration.
Further, controlling operation of the gas conditioning assembly as a function of the oxygen concentration includes: controlling a vacuum pump to be started, and pumping oxygen in the sealed drawer through an oxygen separation membrane module; detecting the oxygen concentration in the sealed drawer; when the oxygen concentration is reduced by a first preset concentration, stopping pumping the oxygen in the sealed drawer, and filling nitrogen into the sealed drawer through the nitrogen separation membrane module; and detecting the oxygen concentration and the nitrogen concentration in the sealed drawer, and stopping filling nitrogen into the sealed drawer when the sum of the oxygen concentration and the nitrogen concentration reaches a second preset concentration.
Further, after stopping filling nitrogen gas into the sealed drawer, the method also comprises the following steps: judging whether the oxygen concentration reaches the target oxygen concentration; if so, controlling the vacuum pump to be closed, and controlling the effective use area of the adjustable controlled atmosphere membrane component to be the maximum use area; otherwise, the operation of the gas regulating assembly is continuously controlled according to the oxygen concentration.
Further, the oxygen in the sealed drawer is pumped out through the oxygen separation membrane module, and the method comprises the following steps: controlling the first switch valve and the third switch valve to be opened, and controlling the second switch valve and the fourth switch valve to be closed; fill into nitrogen gas through nitrogen gas separation membrane module in to sealed drawer, include: and controlling the second switch valve and the fourth switch valve to be opened, and controlling the first switch valve and the third switch valve to be closed.
Further, after controlling the vacuum pump to be started, the method further comprises the following steps: and controlling the effective use area of the adjustable controlled atmosphere membrane component to be the minimum use area.
Further, before controlling the operation of the gas regulating assembly according to the target oxygen concentration, the method further comprises: detecting whether a door body of the preservation refrigerator is closed or not; if so, triggering control of operation of the gas regulating assembly in accordance with the target oxygen concentration.
According to yet another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the crisper control method as described above when executed by a computer processor.
The invention provides a fresh-keeping refrigerator, which discharges oxygen in a fresh-keeping space through a vacuum pump simultaneously, fills external nitrogen into the fresh-keeping space, can completely seal the fresh-keeping space, does not generate internal and external pressure difference, so that the oxygen in the space can be reduced to the optimal concentration for keeping fruits and vegetables fresh, prolongs the fresh-keeping time of the fruits and vegetables to the maximum extent, effectively solves the problem that the active air conditioning in the prior art is difficult to realize the expected oxygen concentration in the fresh-keeping box, effectively reduces the oxygen in the fresh-keeping space, inhibits the metabolism of the fruits and vegetables, prolongs the fresh-keeping time of the fruits and vegetables, and improves the fresh-keeping effect.
Drawings
FIG. 1 is a schematic diagram of an alternative configuration of a crisper according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative configuration of an oxygen-rich membrane module in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of an alternative configuration of a nitrogen-rich membrane module according to an embodiment of the invention;
FIG. 4 is a schematic diagram of an alternative construction of a gas conditioning assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an alternative construction of a tunable gas-regulating membrane module according to an embodiment of the invention;
FIG. 6 is an alternative flow chart of a crisper control method according to an embodiment of the present invention;
fig. 7 is another alternative flow chart of a crisper control method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, there is provided a freshness refrigerator, specifically, fig. 1 shows an alternative structural schematic diagram of the freshness refrigerator, as shown in fig. 1, the freshness refrigerator includes:
the sealed drawer 10 is provided with a fresh-keeping space which is relatively isolated from air in the sealed drawer 10;
a gas conditioning assembly comprising: the oxygen-enriched membrane component 20 is used for separating oxygen from the fresh-keeping space; the nitrogen-rich membrane module 40 and the oxygen-rich membrane module 40 are used for filling nitrogen into the fresh-keeping space.
In the embodiment, the fresh-keeping refrigerator is provided, oxygen in the fresh-keeping space is exhausted through the vacuum pump, and outside nitrogen is filled into the fresh-keeping space, so that the fresh-keeping space can be completely sealed, no internal and external pressure difference is generated, the indoor oxygen can be reduced to the optimal concentration for keeping the fruits and vegetables fresh, the fresh-keeping time of the fruits and vegetables is prolonged to the maximum extent, the problem that the expected oxygen concentration in the fresh-keeping box is difficult to achieve through active air regulation in the prior art is effectively solved, the oxygen in the fresh-keeping space is effectively reduced, the metabolism of the fruits and vegetables is inhibited, the fresh-keeping time of the fruits and vegetables is prolonged, and the fresh-keeping effect is improved.
Also shown in FIG. 1 is a vacuum pump 50, including an extraction tube 51 and an exhaust tube 52; the pumping pipe 51 is connected to the oxygen separation membrane module 21 and the nitrogen separation membrane module 41, respectively, and the exhaust pipe 52 is connected to the atmosphere and the sealing drawer 10, respectively.
Fig. 2 shows an alternative structural schematic diagram of the oxygen-enriched membrane module 20 in the present embodiment, as shown in fig. 2, in the present embodiment, the oxygen-enriched membrane module 20 includes an oxygen separation membrane module 21, the oxygen separation membrane module 21 is used for separating oxygen, a vacuum pump 50 is connected to the oxygen separation membrane module 21 through an air exhaust pipe 51, and the vacuum pump 50 exhausts oxygen from the fresh-keeping space through the oxygen separation membrane module 21. As shown in fig. 1, in use, the oxygen-enriched membrane module 20 is disposed in the fresh-keeping space, the vacuum pump 50 is disposed outside the fresh-keeping space, the vacuum pump 50 acts on the oxygen-enriched membrane module 20 through the air exhaust pipe 51, the oxygen-enriched membrane module 20 only allows oxygen to pass through, nitrogen remains in the fresh-keeping space, and oxygen separated by the oxygen-enriched membrane module 20 is exhausted to the outside space through the air exhaust pipe 51 and the vacuum pump 50.
Fig. 3 shows an optional structural schematic diagram of the nitrogen-rich membrane module 40 in the present embodiment, which is similar to the oxygen-rich membrane module 20, as shown in fig. 3, in the present embodiment, the nitrogen-rich membrane module 40 includes a nitrogen separation membrane module 41, the nitrogen separation membrane module 41 is used for separating nitrogen, the vacuum pump 50 is connected to the nitrogen separation membrane module 41 through an exhaust pipe 51, the vacuum pump 50 pumps out nitrogen through the nitrogen separation membrane module 41, and then the nitrogen enters the fresh-keeping space through an exhaust pipe 52 connected to the fresh-keeping space, so as to prevent the fresh-keeping space from deforming due to negative pressure generated by oxygen exhaust, or due to the effect of internal and external pressure difference, air outside the fresh-keeping space will enter the fresh-keeping space through an air-regulating membrane, so that after the oxygen in the fresh-keeping space is reduced to a certain concentration, the vacuum pump continues to operate, and the oxygen will not be reduced yet. As shown in fig. 1, in use, the nitrogen separation membrane module 41 is disposed outside the fresh food space. The nitrogen separation membrane module 41 has a different function from the oxygen separation membrane module 21, the oxygen separation membrane module 21 is used for pumping out oxygen, and the nitrogen separation membrane module 41 is used for pumping out nitrogen, which is a difference between the two.
Optionally, in the solution of the present embodiment, the oxygen separation membrane module 21 is at least partially disposed inside the seal drawer 10, and the vacuum pump 50 is disposed outside the seal drawer 10. Wherein, at least one side of the oxygen separation membrane module 21 blocking nitrogen flow should be located in the sealing drawer 10 when in use, but it is also feasible to locate the whole oxygen separation membrane module 21 in the sealing drawer 10. The vacuum pump 50 is disposed outside the sealing drawer 10 and connected to the oxygen separation membrane module 21 through the air exhaust tube 51, and the position of the vacuum pump 50 may be a position adjacent to the sealing drawer 10, or a position far away from the sealing drawer 10, such as a refrigerator liner or a compressor compartment, as long as it is connected to the oxygen separation membrane module 21 through the air exhaust tube 51. In addition, the vacuum pump 50 may be disposed inside the seal drawer 10, and the vacuum pump 50 may exhaust oxygen out of the seal drawer 10 through an exhaust pipe.
More preferably, as shown in fig. 2, the oxygen enrichment membrane module 20 includes a first wind power part 22, the first wind power part 22 being provided at the oxygen separation membrane module 21 for circulating air at the oxygen separation membrane module 21 to prevent nitrogen from being accumulated; as shown in fig. 3, the nitrogen-rich membrane module 40 includes a second wind member 42, and the second wind member 42 is provided at the nitrogen separation membrane module 41 for circulating air at the nitrogen separation membrane module 41 to prevent oxygen from being accumulated. Specifically, the first wind power part 22 is a fan mounted on the oxygen separation membrane module 21; the second wind power part 42 is a fan installed on the nitrogen separation membrane module 41; wherein, the fan is two fans arranged in parallel.
In use, the wind power component can circulate air at the oxygen separation membrane module 21 or the nitrogen separation membrane module 41 to prevent the accumulation of nitrogen or oxygen, thereby improving the separation efficiency of oxygen of the oxygen-enriched membrane module 20 and the separation efficiency of nitrogen of the nitrogen-enriched membrane module 40.
As an alternative embodiment, the wind power component is a fan. Preferably, the number of the fans is two, and the two fans are arranged on the oxygen separation membrane module 21 or the nitrogen separation membrane module 41 in parallel, so that the air circulation efficiency in the fresh-keeping space is improved. As a further alternative, the wind member may also be a ventilation board which is movable to circulate the air flow.
The specific structure of the gas conditioning assembly is shown in fig. 4, and as shown in fig. 4, a vacuum pump 50, including an exhaust tube 51 and an exhaust tube 52; wherein, exhaust tube 51 includes the first branch road of bleeding and the second branch road of bleeding, and blast pipe 52 includes the first branch road of bleeding and the second branch road of bleeding, and the first branch road of bleeding links to each other with oxygen separation membrane module 21, and the second branch road of bleeding links to each other with nitrogen gas separation membrane module 41, and the first branch road of bleeding links to each other with the atmosphere, and the second branch road of bleeding links to each other with sealed drawer 10.
Further, the gas conditioning assembly further comprises: a first switch valve 511 positioned in the first pumping branch; a second switch valve 512 located in the second pumping branch; a third on/off valve 521 located in the first exhaust branch; and a fourth switching valve 522 located in the second exhaust branch. When the first control valve and the third control valve are opened and the second control valve and the fourth control valve are closed, oxygen is pumped out of the compartment, and oxygen reduction in the fresh-keeping space is realized; when the second control valve and the fourth control valve are opened and the first control valve and the third control valve are closed, nitrogen gas enters from the outside of the compartment, and nitrogen charging in the fresh-keeping space is realized.
As shown in fig. 1 and 4, the gas conditioning assembly further comprises: the adjustable gas regulating membrane assembly 30 is arranged on the sealing drawer 10. Fig. 5 shows an alternative structure of the modified atmosphere module 30, as shown in fig. 5, comprising 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 and the carbon dioxide concentration of the fresh-keeping space relative to the external space.
By applying the technical scheme of the invention, oxygen can be separated from the fresh-keeping space through the oxygen-enriched membrane component 20, so that a 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 and the carbon dioxide concentration in the fresh-keeping space can be finely adjusted through the air-adjusting film 31, the fresh-keeping space is used, the oxygen concentration in the fresh-keeping space can be further reduced under the respiration effect of the food materials such as fruits and vegetables, the carbon dioxide concentration is increased, therefore, the oxygen in the external space can be properly supplemented into the fresh-keeping space through the air-adjusting film 31, the carbon dioxide in the fresh-keeping space is scattered to the external space, and the anaerobic respiration of the food materials such as fruits and vegetables caused by the over-low oxygen concentration and the over-high carbon dioxide concentration in the fresh-keeping space is avoided. 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 and the carbon dioxide concentration in the fresh-keeping space can be adjusted, the situation that the oxygen is too much enters the fresh-keeping space to destroy the low-oxygen atmosphere is avoided, and the anaerobic respiration of food materials such as fruits and vegetables caused by too low oxygen concentration and too high carbon dioxide concentration in the fresh-keeping space is also avoided.
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. 5, 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 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. 5, 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 in a shielding/avoiding manner. 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.
As shown in fig. 5, 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.
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. 5, 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.
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 respectively have different permeation rates, so that the modified atmosphere film plays a role in relatively stabilizing the concentration of the oxygen and the carbon dioxide in the fresh-keeping space when the concentration of the carbon dioxide in the fresh-keeping space is proper.
In addition, this scheme still includes: the oxygen detection module 60 is arranged in the sealed drawer 10 and is used for detecting the oxygen concentration in the sealed drawer 10; and the nitrogen detection module 70 is arranged in the sealed drawer 10 and is used for detecting the nitrogen concentration in the sealed drawer 10.
Example 2
In a preferred embodiment 2 of the present invention, a method for controlling a freshness refrigerator is provided, which is applied to the freshness refrigerator in the above embodiment 1. Specifically, fig. 6 shows an alternative flowchart of the method, and as shown in fig. 6, the method includes the following steps S602-S606:
s602: acquiring the variety of food materials stored in the sealed drawer;
s604: determining corresponding target oxygen concentration according to the food material types;
s606: the operation of the gas conditioning assembly is controlled in accordance with the target oxygen concentration.
In the embodiment, the fresh-keeping refrigerator is provided, oxygen in the fresh-keeping space is exhausted through the vacuum pump, and outside nitrogen is filled into the fresh-keeping space, so that the fresh-keeping space can be completely sealed, no internal and external pressure difference is generated, the indoor oxygen can be reduced to the optimal concentration for keeping the fruits and vegetables fresh, the fresh-keeping time of the fruits and vegetables is prolonged to the maximum extent, the problem that the expected oxygen concentration in the fresh-keeping box is difficult to achieve through active air regulation in the prior art is effectively solved, the oxygen in the fresh-keeping space is effectively reduced, the metabolism of the fruits and vegetables is inhibited, the fresh-keeping time of the fruits and vegetables is prolonged, and the fresh-keeping effect is improved.
In an optional embodiment of the present invention, the food material to be stored is selected or input through the refrigerator interface, and the processor retrieves the oxygen concentration range suitable for the food material in the database according to the stored food material, where it is required to say that if a single food material is stored, the oxygen concentration range suitable for the food material can be selected; if a plurality of food materials are stored, a general oxygen concentration range can be selected, wherein the general oxygen concentration range is 3% -8%. Suitable oxygen concentration ranges for different fruit and vegetable storage are shown in tables 1 and 2.
TABLE 1 suitable oxygen concentration for different fruit storage
Fruit name Oxygen concentration (%)
Avocado 3～5
Pomegranate 2～4
Apple (Malus pumila) 2～5
Pear (pear) 2～5
Peach shape 8～10
Grape 3～5
Strawberry 3～5
Lichee 3～6
Longan fruit 6～8
Jujube (Chinese date) 3～6
Lemon 0～5
Hami melon 3～5
Citrus fruit 5～8
Cherry 2～3
Plum 3～5
TABLE 2 suitable oxygen concentration for different vegetable storage
Figure BDA0003270676560000101
Figure BDA0003270676560000111
Wherein, according to the operation of oxygen concentration control gas adjustment assembly, include: controlling a vacuum pump to be started, and pumping oxygen in the sealed drawer through an oxygen separation membrane module; detecting the oxygen concentration in the sealed drawer; when the oxygen concentration is reduced by a first preset concentration, stopping pumping the oxygen in the sealed drawer, and filling nitrogen into the sealed drawer through the nitrogen separation membrane module; and detecting the oxygen concentration and the nitrogen concentration in the sealed drawer, and stopping filling nitrogen into the sealed drawer when the sum of the oxygen concentration and the nitrogen concentration reaches a second preset concentration. After stopping filling nitrogen into the sealed drawer, the method further comprises the following steps: judging whether the oxygen concentration reaches the target oxygen concentration; if so, controlling the vacuum pump to be closed, and controlling the effective use area of the adjustable controlled atmosphere membrane component to be the maximum use area; otherwise, the operation of the gas regulating assembly is continuously controlled according to the oxygen concentration.
Under the action of the vacuum pump, oxygen is continuously pumped out, and nitrogen is trapped inside, so that the oxygen reduction effect is achieved. The suitable humidity range for fruit and vegetable fresh-keeping is 90% -97%, because when the fruit and vegetable is just placed in the sealed drawer, the humidity in the drawer is about 60% generally, and the vacuum pump can take away part of moisture in the air exhaust process, so after the vacuum pump is started, the air-conditioning film is in a closed state, and the humidity in the drawer can be gradually increased.
At the moment, the vacuum pump starts to work, meanwhile, the first control valve and the third control valve are opened, the second control valve and the fourth control valve are closed, and the oxygen in the drawer starts to gradually decrease. The oxygen concentration in the space is monitored by an oxygen sensor, the oxygen concentration C1 in the drawer at the moment is recorded, and when the oxygen concentration drops to a first preset concentration, for example 3%, the first control valve and the third control valve are controlled to be closed, the second control valve and the fourth control valve are controlled to be opened, and nitrogen charging into the drawer is started. Monitoring the nitrogen concentration by a nitrogen sensor, when the sum of the nitrogen concentration and the oxygen concentration reaches 99 percent, if C1 reaches the lower limit C of the set oxygen concentration range, closing the vacuum pump, controlling the vent hole of the modified atmosphere membrane component to be in a modified atmosphere fully-opened state, and controlling the effective area S of the modified atmosphere membrane at the momentFilmS2 (modified atmosphere film maximum area). If the C1 does not reach the set lower limit C of the oxygen concentration, continuing oxygen reduction, controlling the first control valve and the third control valve to open, closing the second control valve and the fourth control valve, starting oxygen reduction, circulating until the oxygen concentration in the space reaches the set lower limit C of the oxygen concentration, closing the vacuum pump, controlling the gas-regulating membrane module to be in a gas-regulating full-open state, and controlling the effective area S of the gas-regulating membrane to be in the gas-regulating full-open state at the momentFilm＝S2。
The oxygen in the sealed drawer is extracted through the oxygen separation membrane module, including: controlling the first switch valve and the third switch valve to be opened, and controlling the second switch valve and the fourth switch valve to be closed; fill into nitrogen gas through nitrogen gas separation membrane module in to sealed drawer, include: and controlling the second switch valve and the fourth switch valve to be opened, and controlling the first switch valve and the third switch valve to be closed. When the vacuum pump 5 works, when the first control valve and the third control valve are opened and the second control valve and the fourth control valve are closed, oxygen is pumped out of the compartment, and oxygen reduction in the fresh-keeping compartment is realized; when the second control valve and the fourth control valve are opened and the first control valve and the third control valve are closed, nitrogen gas enters from the outside of the fresh-keeping chamber, and nitrogen charging in the fresh-keeping chamber is realized.
In addition, after controlling the vacuum pump to start, the method further comprises the following steps: and controlling the effective use area of the adjustable controlled atmosphere membrane component to be the minimum use area. The minimum usable area may be 0% or a preset area set by a user.
Before controlling the operation of the gas regulating assembly according to the target oxygen concentration, the method further comprises the following steps: detecting whether a door body of the preservation refrigerator is closed or not; if so, triggering control of operation of the gas regulating assembly in accordance with the target oxygen concentration. Whether the door body is closed or not is detected through a sensor or other circuit switches and the like, and the door body works after being closed. Considering that a user can open the door body at any time to take food materials, when oxygen reduction is stopped, whether the door body is closed or not is continuously monitored, if the door body is not closed, the oxygen reduction program and the nitrogen charging program are not carried out, and if the drawer is closed, the oxygen reduction program is carried out, so that the optimal fresh-keeping oxygen concentration range of each partition is reached.
Another method for controlling a fresh-keeping refrigerator is further provided in the preferred embodiment 2 of the present invention, and specifically, fig. 7 is an optional flowchart of the method, as shown in fig. 7, the method includes the following steps S701 to S716:
s701: starting;
s702: selecting or inputting stored food materials through a refrigerator interface;
s703: the processor determines the oxygen concentration range through the database according to the food materials; the processor calls an oxygen concentration range suitable for the food material in the database according to the stored food material, and if the stored food material is a single food material, the oxygen concentration range suitable for the food material can be selected; if a plurality of food materials are stored, selecting a universal oxygen concentration range, wherein the universal oxygen concentration range is 3% -8%;
s704: detecting whether the door body is closed; if yes, go to step S706, otherwise go to step S705; whether the door body is closed or not is detected through a sensor or other circuit switches and the like, and the door body works after being closed;
s705: closing the vacuum pump; when the vacuum pump is closed, oxygen reduction is not carried out;
S706：SfilmS1; if the door body is closed, oxygen reduction is carried out, the vent holes 33 of the controlled atmosphere module are controlled to be completely closed, and the effective area S of the controlled atmosphere module is controlledFilm＝S1＝0；
S707: starting a vacuum pump;
s708: the first control valve is opened, and the third control valve is opened;
s709: meanwhile, the second control valve is closed, and the fourth control valve is closed; the vacuum pump starts to work, meanwhile, the first control valve and the third control valve are opened, the second control valve and the fourth control valve are closed, and oxygen in the drawer starts to gradually decrease;
s710: c is not less than C1; if yes, go to step S711, otherwise go to step S713; monitoring the oxygen concentration in the space through an oxygen sensor, and recording the oxygen concentration C1 in the drawer at the moment;
s711: closing the vacuum pump;
S712：SfilmS2; if C1 reaches the lower limit C of the set oxygen concentration range, the vacuum pump is closed, and the controlled atmosphere membrane module is controlled to be in a controlled atmosphere full-open state, and S is carried out at the momentFilmS2 maximum area;
s713: whether C1-C2 is more than or equal to 3 percent is true or not; if yes, go to step S714, otherwise go to step S708; when the oxygen concentration decreases to a first preset concentration, for example, 3%, controlling the first control valve and the third control valve to close, and the second control valve and the fourth control valve to open, and starting to charge nitrogen into the drawer, namely, steps S714-S715;
s714: the first control valve is closed, and the third control valve is closed;
s715: meanwhile, the second control valve is opened, and the fourth control valve is opened;
s716: whether Q + C2 is more than or equal to 99 percent is true or not; if yes, go to step S714, otherwise go to step S708; monitoring the nitrogen concentration through a nitrogen sensor, controlling a first control valve and a third control valve to be opened when the sum of the nitrogen concentration and the oxygen concentration reaches 99%, closing a second control valve and a fourth control valve, starting oxygen reduction, circulating until the oxygen concentration in the space reaches a lower limit C of the set oxygen concentration, closing a vacuum pump, controlling the vent holes 33 of the controlled atmosphere membrane module to be completely opened, and otherwise, continuing to perform nitrogen filling operation.
The oxygen in the fresh-keeping space is discharged through the vacuum pump, the outside nitrogen is filled into the fresh-keeping space, the fresh-keeping space can be completely sealed, the internal and external pressure difference can not be generated, therefore, the indoor oxygen can be reduced to the optimal concentration for keeping the fruits and vegetables fresh, the fresh-keeping time of the fruits and vegetables is prolonged to the maximum extent, the problem that the active air regulation in the prior art is difficult to realize the expected oxygen concentration in the fresh-keeping box is effectively solved, the oxygen in the fresh-keeping space is effectively reduced, the metabolism of the fruits and vegetables is inhibited, the fresh-keeping time of the fruits and vegetables is prolonged, and the fresh-keeping effect is improved.
Example 3
Based on the method for controlling the freshness refrigerator provided in the above embodiment 2, in a preferred embodiment 3 of the present invention, there is also provided a storage medium containing computer executable instructions, which are executed by a computer processor to perform the method for controlling the freshness refrigerator as described above.
In the embodiment, the fresh-keeping refrigerator is provided, oxygen in the fresh-keeping space is exhausted through the vacuum pump, and outside nitrogen is filled into the fresh-keeping space, so that the fresh-keeping space can be completely sealed, no internal and external pressure difference is generated, the indoor oxygen can be reduced to the optimal concentration for keeping the fruits and vegetables fresh, the fresh-keeping time of the fruits and vegetables is prolonged to the maximum extent, the problem that the expected oxygen concentration in the fresh-keeping box is difficult to achieve through active air regulation in the prior art is effectively solved, the oxygen in the fresh-keeping space is effectively reduced, the metabolism of the fruits and vegetables is inhibited, the fresh-keeping time of the fruits and vegetables is prolonged, and the fresh-keeping effect is improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (15)

1. A crisper refrigerator, comprising:
the refrigerator comprises a sealed drawer (10), wherein a fresh-keeping space which is relatively isolated from air is formed in the sealed drawer (10);
a gas conditioning assembly comprising: an oxygen-rich membrane module (20), the oxygen-rich membrane module (20) for separating oxygen from the fresh space; and the nitrogen-rich membrane module (40) is used for filling nitrogen into the fresh-keeping space.
2. The crisper refrigerator of claim 1,
the oxygen-rich membrane module (20) comprises: an oxygen separation membrane module (21) for separating oxygen;
the nitrogen-rich membrane module (40) comprises: and the nitrogen separation membrane module (41) is used for separating nitrogen.
3. The crisper refrigerator of claim 2, wherein the gas conditioning assembly further comprises:
a vacuum pump (50) including an air extraction pipe (51) and an exhaust pipe (52); wherein, exhaust tube (51) include first branch road of bleeding and second branch road of bleeding, blast pipe (52) include first branch road of bleeding and second branch road of bleeding, first branch road of bleeding with oxygen separation membrane module (21) link to each other, the second bleed the branch road with nitrogen gas separation membrane module (41) link to each other, first branch road of bleeding links to each other with the atmosphere, the second exhaust branch road with sealed drawer (10) link to each other.
4. The crisper refrigerator of claim 3, wherein the gas conditioning assembly further comprises:
a first switch valve (511) located in the first pumping branch;
a second switch valve (512) located in the second pumping branch;
a third on/off valve (521) located in the first exhaust branch;
a fourth switching valve (522) located in the second exhaust branch.
5. The crisper of claim 2, characterized in that the oxygen-rich membrane module (20) comprises a first wind power component (22), the first wind power component (22) being provided at the oxygen separation membrane module (21) for circulating air at the oxygen separation membrane module (21) against nitrogen accumulation;
the nitrogen-rich membrane module (40) comprises a second wind member (42), the second wind member (42) being provided at the nitrogen separation membrane module (41) for circulating air at the nitrogen separation membrane module (41) to prevent oxygen from accumulating.
6. The crisper refrigerator of claim 5, characterized in that the first wind power component (22) is a fan mounted on the oxygen separation membrane module (21); the second wind power component (42) is a fan mounted on the nitrogen separation membrane module (41); wherein, the fan is two fans that set up side by side.
7. The crisper refrigerator of claim 1, wherein the gas conditioning assembly further comprises:
the adjustable modified atmosphere membrane assembly (30) is arranged on the sealed drawer (10), the adjustable modified atmosphere membrane assembly (30) comprises a modified atmosphere membrane (31) and a regulating piece (32), the regulating piece (32) regulates the effective use area of the modified atmosphere membrane (31), and the modified atmosphere membrane (31) is used for regulating the oxygen concentration and the carbon dioxide concentration of the fresh-keeping space relative to the external space.
8. The crisper refrigerator of claim 1, further comprising:
the oxygen detection module (60) is arranged in the sealed drawer (10) and is used for detecting the oxygen concentration in the sealed drawer (10);
and the nitrogen detection module (70) is arranged in the sealed drawer (10) and is used for detecting the nitrogen concentration in the sealed drawer (10).
9. A freshness refrigerator control method characterized by being applied to the freshness refrigerator according to any one of claims 1 to 8; the method comprises the following steps:
acquiring the variety of food materials stored in the sealed drawer;
determining a corresponding target oxygen concentration according to the food material type;
controlling operation of the gas conditioning assembly in accordance with the target oxygen concentration.
10. The method of claim 9, wherein controlling operation of a gas conditioning assembly in accordance with the oxygen concentration comprises:
controlling a vacuum pump to be started, and pumping oxygen in the sealed drawer through an oxygen separation membrane module;
detecting the oxygen concentration in the sealed drawer;
when the oxygen concentration is reduced by a first preset concentration, stopping pumping the oxygen in the sealed drawer, and filling nitrogen into the sealed drawer through a nitrogen separation membrane module;
and detecting the oxygen concentration and the nitrogen concentration in the sealed drawer, and stopping filling nitrogen into the sealed drawer when the sum of the oxygen concentration and the nitrogen concentration reaches a second preset concentration.
11. The method of claim 10, further comprising, after ceasing the filling of nitrogen into the sealed drawer:
judging whether the oxygen concentration reaches the target oxygen concentration;
if so, controlling the vacuum pump to be closed, and controlling the effective use area of the adjustable controlled atmosphere membrane component to be the maximum use area;
otherwise, continuing to control the operation of the gas regulating assembly according to the oxygen concentration.
12. The method of claim 10, wherein drawing oxygen out of the sealed drawer through an oxygen separation membrane module comprises: controlling the first switch valve and the third switch valve to be opened, and controlling the second switch valve and the fourth switch valve to be closed;
filling nitrogen into the sealed drawer through a nitrogen separation membrane module, and the method comprises the following steps: and controlling the second switch valve and the fourth switch valve to be opened, and controlling the first switch valve and the third switch valve to be closed.
13. The method of claim 10, further comprising, after the controlling the vacuum pump is turned on:
and controlling the effective use area of the adjustable controlled atmosphere membrane component to be the minimum use area.
14. The method of claim 9, further comprising, prior to controlling operation of a gas conditioning assembly in accordance with the target oxygen concentration:
detecting whether a door body of the preservation refrigerator is closed or not;
and if so, triggering the operation of the gas regulating component according to the target oxygen concentration.
15. A storage medium containing computer-executable instructions, wherein the computer-executable instructions, when executed by a computer processor, are for performing the crisper control method of any of claims 9 to 14.
CN202111100871.7A 2021-09-18 2021-09-18 Fresh-keeping refrigerator and control method thereof Pending CN113834253A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1218172A (en) * 1998-09-04 1999-06-02 天津大学 Technology for air conditioning refrigerators by gas membrane separation
CN201443942U (en) * 2009-05-06 2010-04-28 山东金泽尔工贸有限公司 Nitrogen-padded adjustment fresh-keeping refrigerator
CN211716944U (en) * 2019-12-12 2020-10-20 海信（山东）冰箱有限公司 A kind of refrigerator
CN112984892A (en) * 2019-12-12 2021-06-18 海信（山东）冰箱有限公司 Refrigerator and air-conditioning preservation method thereof
CN113137807A (en) * 2021-04-28 2021-07-20 珠海格力电器股份有限公司 Gas concentration regulation and control method for refrigerator and refrigerator
CN113137812A (en) * 2021-04-28 2021-07-20 珠海格力电器股份有限公司 Refrigerator control method and refrigerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1218172A (en) * 1998-09-04 1999-06-02 天津大学 Technology for air conditioning refrigerators by gas membrane separation
CN201443942U (en) * 2009-05-06 2010-04-28 山东金泽尔工贸有限公司 Nitrogen-padded adjustment fresh-keeping refrigerator
CN211716944U (en) * 2019-12-12 2020-10-20 海信（山东）冰箱有限公司 A kind of refrigerator
CN112984892A (en) * 2019-12-12 2021-06-18 海信（山东）冰箱有限公司 Refrigerator and air-conditioning preservation method thereof
CN113137807A (en) * 2021-04-28 2021-07-20 珠海格力电器股份有限公司 Gas concentration regulation and control method for refrigerator and refrigerator
CN113137812A (en) * 2021-04-28 2021-07-20 珠海格力电器股份有限公司 Refrigerator control method and refrigerator

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Application publication date: 20211224