CN113124611B - Controlled atmosphere control method of refrigerator, controlled atmosphere drawer and fresh-keeping refrigerator - Google Patents
Controlled atmosphere control method of refrigerator, controlled atmosphere drawer and fresh-keeping refrigerator Download PDFInfo
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- CN113124611B CN113124611B CN202110469958.5A CN202110469958A CN113124611B CN 113124611 B CN113124611 B CN 113124611B CN 202110469958 A CN202110469958 A CN 202110469958A CN 113124611 B CN113124611 B CN 113124611B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000004320 controlled atmosphere Methods 0.000 title claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 123
- 239000001301 oxygen Substances 0.000 claims abstract description 123
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 123
- 239000012528 membrane Substances 0.000 claims abstract description 52
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000000926 separation method Methods 0.000 claims abstract description 52
- 239000007789 gas Substances 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 238000009423 ventilation Methods 0.000 claims description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 abstract description 15
- 235000013305 food Nutrition 0.000 abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 20
- 230000001276 controlling effect Effects 0.000 description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 description 10
- 235000012055 fruits and vegetables Nutrition 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000029058 respiratory gaseous exchange Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000004321 preservation Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 235000013311 vegetables Nutrition 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000021022 fresh fruits Nutrition 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- F25D17/047—Pressure equalising 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
- 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
- F25D25/00—Charging, supporting, and discharging the articles to be cooled
- F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
- F25D25/024—Slidable shelves
- F25D25/025—Drawers
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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
- 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
Landscapes
- 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 an air-conditioning control method of a refrigerator, an air-conditioning drawer and a fresh-keeping refrigerator. Wherein, the method comprises the following steps: monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer in a closed state of the drawer; and controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel according to the oxygen concentration and the internal and external pressure difference. The invention realizes the linkage control of the nitrogen-oxygen separation membrane component and the air inlet switch of the air pipeline channel, can adjust the gas concentration of the drawer to effectively keep the refrigerated food fresh, and can solve the problems of drawer deformation and negative pressure generation, so that the drawer is easy to push and pull and is safe.
Description
Technical Field
The invention relates to the technical field of refrigerator preservation, in particular to an air-conditioning control method of a refrigerator, an air-conditioning drawer and a preservation refrigerator.
Background
Modified atmosphere storage refers to a refrigeration method in a specific gas environment. The oxygen content in normal atmosphere is 20.9%, carbon dioxide content is 0.03%, nitrogen content is 78%, and the modified atmosphere storage is based on low-temperature storage, and is characterized by that the contents of oxygen, carbon dioxide and nitrogen in the air can be regulated, i.e. the gas components of storage environment can be changed, and the concentration of carbon dioxide or nitrogen can be raised by reducing oxygen content, and according to the different requirements of storage material the gas components can be retained in the desired condition. The principle is as follows: after the fresh fruits and vegetables are picked, the fruits and vegetables still have vigorous respiration and evaporation effects, absorb oxygen from the air, decompose and consume self nutrient substances, and generate carbon dioxide, water and heat. As the respiration consumes the nutrients of the picked fruits and vegetables, the key to prolonging the storage period of the fruits and vegetables is to reduce the respiration rate, and the change of gas components in the storage environment has obvious influence on the picked fruits and vegetables. The low oxygen content can effectively inhibit respiration, reduce evaporation and microbial growth to a certain extent, and the carbon dioxide with proper high concentration can slow down respiration, so that the effect of delaying the start of the breathing jump is realized on the breathing jump type fruits and vegetables, and the after-ripening and the aging of the fruits and vegetables are delayed. The modified atmosphere storage method can effectively inhibit the respiration of the fruits and vegetables, prolong the aging (maturation and aging) and related physiological and biochemical changes, and achieve the purpose of prolonging the storage and preservation period of the fruits and vegetables.
According to the principle of controlled atmosphere regulation, controlled atmosphere storage can be divided into active controlled atmosphere and passive controlled atmosphere, wherein active controlled atmosphere means that the concentration of gas is always controlled within a certain constant value or range in the storage process by means of manual intervention. However, in the process of gas adjustment, as more oxygen can be discharged from the drawer, the gas pressure in the drawer is lower than the atmospheric pressure, and the refrigerator drawer is easily deformed under the pressure difference, so that the drawer is inconvenient to push and pull, or other safety problems are caused.
Aiming at the problem that the drawer is easy to deform due to air pressure change in the air conditioning process of the refrigerator in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an air-conditioning control method of a refrigerator, an air-conditioning drawer and a fresh-keeping refrigerator, and aims to solve the problem that the drawer is easy to deform due to air pressure change in the air-conditioning process of the refrigerator in the prior art.
In order to solve the technical problem, the invention provides a controlled atmosphere control method of a refrigerator, wherein the method comprises the following steps: monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer in a closed state of the drawer; controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel according to the oxygen concentration and the internal and external pressure difference;
the nitrogen-oxygen separation membrane module comprises a vacuum pump and a nitrogen-oxygen separation membrane module which is arranged on the drawer and is used for separating nitrogen and oxygen, and the vacuum pump is used for pumping the oxygen in the drawer through the nitrogen-oxygen separation membrane module; the air pipeline channel is positioned in the drawer and is used for communicating the fresh-keeping space and the external space of the drawer.
Further, controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel according to the oxygen concentration and the internal and external pressure difference comprises:
if the oxygen concentration is greater than a first preset value, controlling the vacuum pump to operate according to a preset flow until the oxygen concentration is less than or equal to the first preset value;
if the oxygen concentration is less than or equal to the first preset value and less than or equal to the second preset value, the opening and closing of an air inlet of the air pipeline channel are further controlled according to the internal and external pressure difference;
and if the oxygen concentration is less than a second preset value, controlling the air inlet of the air pipeline channel to be opened.
Further, if the oxygen concentration is less than or equal to the first preset value and less than or equal to the second preset value, the opening and closing of the air inlet of the air pipeline channel is further controlled according to the internal and external pressure difference, and the method comprises the following steps of:
if the internal and external pressure difference is less than or equal to a third preset value and less than or equal to a fourth preset value, keeping the current state unchanged;
if the internal and external pressure difference is less than a third preset value, controlling the air inlet of the air pipeline channel to be opened;
and if the internal and external pressure difference is larger than a fourth preset value, monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer again.
Further, according to the oxygen concentration and the internal and external pressure difference, controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel, the method also comprises the following steps:
if the internal and external pressure difference is less than or equal to a third preset value and less than or equal to a fourth preset value, controlling the opening and closing of the vacuum pump further according to the oxygen concentration;
if the internal and external pressure difference is less than a third preset value, controlling the air inlet of the air pipeline channel to be opened, and closing the air inlet until the internal and external pressure difference is greater than or equal to the third preset value;
and if the internal and external pressure difference is larger than a fourth preset value, controlling the opening and closing of the vacuum pump according to the oxygen concentration.
Further, controlling the opening and closing of the vacuum pump further according to the oxygen concentration includes:
if the oxygen concentration is greater than a first preset value, controlling the vacuum pump to operate according to a preset flow until the oxygen concentration is less than or equal to the first preset value;
if the oxygen concentration is less than or equal to the first preset value and less than or equal to the second preset value, keeping the current state unchanged;
and if the oxygen concentration is less than a second preset value, controlling the air inlet of the air pipeline channel to be opened.
Further, before monitoring the oxygen concentration of the drawer and the pressure difference between the inside and the outside of the drawer, the method further comprises: detecting whether the drawer is completely closed; if yes, triggering and monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer; otherwise, prompting the user to close the drawer.
The invention also provides an air-conditioning drawer, which comprises:
the drawer comprises a drawer body, wherein a fresh-keeping space which is relatively isolated from air is formed in the drawer body; a nitrogen-oxygen separation membrane module comprising: the nitrogen-oxygen separation membrane module is arranged on the drawer body and is used for separating nitrogen and oxygen; the vacuum pump is used for pumping oxygen in the fresh-keeping space through the nitrogen-oxygen separation membrane module;
the one-way valve assembly is arranged on the drawer body, the check direction of the one-way valve assembly is from the fresh-keeping space to the external space, and when the difference value between the air pressure of the fresh-keeping space and the air pressure of the external space is larger than a set threshold value, the air in the external space enters the fresh-keeping space through the one-way valve assembly.
Further, the check valve assembly) includes:
the ventilation component is arranged on the drawer body and is used for communicating the fresh-keeping space with the external space;
and a check valve member mounted on the vent member.
Further, the check valve component is a baffle plate, the baffle plate is arranged on an exhaust port of the ventilation component communicated with the fresh-keeping space, and the baffle plate comprises a first position and a second position, wherein the first position is used for stopping the exhaust port to prevent gas from flowing from the fresh-keeping space to the external space, and the second position is used for being pushed open by the gas to allow the gas to flow from the external space to the fresh-keeping space.
Further, the ventilation component is a bent pipe arranged at the top of the drawer body, the baffle is hinged on the exhaust port, and the baffle is maintained at the first position under the action of gravity.
Further, the ventilation component is a ventilation pipe or a ventilation hole arranged on the side part of the drawer body, the baffle is hinged on the exhaust port, and the baffle is maintained at the first position under the action of gravity.
The invention also provides a fresh-keeping refrigerator which comprises the air-conditioning drawer.
The invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the method as described above.
By applying the technical scheme of the invention, in the process of separating oxygen from the fresh-keeping space by the nitrogen-oxygen separation membrane component, the air pressure in the fresh-keeping space is reduced, and when the difference between the internal pressure and the external pressure is larger, the air inlet of the air pipeline is controlled to be opened, so that the air in the external space enters the fresh-keeping space. Thereby reducing the pressure difference between the inside and the outside of the drawer and avoiding the deformation of the drawer under the pressure difference. The invention can adjust the gas concentration of the drawer to effectively keep the refrigerated food fresh, and can solve the problems of drawer deformation and negative pressure generation, so that the drawer is easy to push and pull and is safe.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of an air-conditioning drawer according to the invention;
FIG. 2 is a flow chart of a controlled atmosphere control method of a refrigerator according to an embodiment of the invention;
FIG. 3 is a detailed flowchart of a modified atmosphere control method of a refrigerator according to an embodiment of the present invention;
fig. 4 is a detailed flowchart of another modified atmosphere control method of a refrigerator according to an embodiment of the 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.
The invention relates to a refrigerator drawer, which is characterized in that the structure of the drawer is improved, an air pipeline channel is arranged in the drawer, and the fresh-keeping space and the external space of the drawer are communicated when the internal and external pressure differences are large, so that the internal and external pressures of the drawer are balanced.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
Fig. 1 shows an embodiment 1 of the modified atmosphere drawer of the invention, which comprises a drawer body 10, a nitrogen-oxygen separation membrane module 20 and a one-way valve assembly 30. Wherein, be formed with the fresh-keeping space of isolated air relatively in the drawer body 10, check valve subassembly 30 sets up on drawer body 10, and check valve subassembly 30's non return direction is from fresh-keeping space to external space. When the nitrogen-oxygen separation membrane module 20 is in use, oxygen is separated from the fresh-keeping space, so that the air pressure in the fresh-keeping space is reduced, and when the difference value between the air pressure in the fresh-keeping space and the air pressure in the external space is greater than a set threshold value, the air in the external space enters the fresh-keeping space through the check valve module 30. Therefore, the internal and external pressure difference of the drawer body 10 can be reduced, the drawer body 10 is prevented from deforming under the pressure difference, the basic appearance of the drawer body 10 is ensured, and related safety problems are not easy to generate.
The predetermined threshold is a set value equal to or greater than zero, and the set value can be adjusted according to design requirements. It should be noted that although the oxygen content in the fresh-keeping space is increased when air enters the fresh-keeping space from the external space, the oxygen content in the fresh-keeping space is gradually reduced to the fresh-keeping requirement under the continuous operation of the nitrogen-oxygen separation membrane module 20.
As shown in fig. 1, in the solution of embodiment 1, the check valve assembly 30 includes a ventilation member 31 and a check valve member, the ventilation member 31 is provided on the drawer body 10, and the check valve member is mounted on the ventilation member 31. When the air-refreshing device is used, the air-ventilating component 31 is communicated with the fresh-keeping space and the external space, and when the difference value between the air pressure of the fresh-keeping space and the air pressure of the external space is greater than a set threshold value, the air in the external space enters the fresh-keeping space through the one-way valve component.
As an alternative embodiment, as shown in fig. 1, the one-way valve member is a baffle 32, and the baffle 32 is installed on the air outlet of the air vent member 31 communicating with the fresh food space. In use, the baffle 32 includes a first position in which it stops on the vent to prevent the passage of gas from the fresh food space to the ambient space, and a second position in which it is lifted by the gas to allow the passage of gas from the ambient space to the fresh food space. When the difference between the air pressure of the fresh-keeping space and the air pressure of the external space is greater than a set threshold value, the baffle 32 is opened; the shutter 32 is closed whenever the difference between the air pressure in the fresh space and the air pressure in the external space is less than a predetermined threshold.
As an alternative implementation, in the solution of example 1, the ventilation part 31 is a bent pipe disposed at the top of the drawer body 10, the exhaust port is disposed along the horizontal direction, and the baffle 32 is hinged to the exhaust port. When the drawer is used, the baffle 32 is maintained at the first position under the action of gravity, and when the difference value between the air pressure of the fresh-keeping space and the air pressure of the external space is greater than a set threshold value, the baffle 32 is opened to enable the air inside and outside the drawer to circulate.
As other alternative embodiments, the ventilation member 31 is a ventilation pipe or a ventilation hole provided at a side portion of the drawer body 10. In this embodiment, the exhaust port is arranged in a horizontal direction, the flap 32 is hinged to the exhaust port, and the flap 32 is maintained in the first position by gravity.
As shown in fig. 1, in the technical solution of embodiment 1, 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 at least partially disposed on the drawer body 10 and is used for separating nitrogen gas and oxygen gas, the vacuum pump 22 is connected to the nitrogen-oxygen separation membrane module 21 through an air extraction pipe 23, and the vacuum pump 22 extracts oxygen gas 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.
It should be noted that the nitrogen-oxygen separation membrane module 21 is at least partially disposed in the fresh keeping space, and the vacuum pump 22 may be disposed in the drawer body 10 or outside the drawer body 10. Optionally, in the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 21 is at least partially disposed in the fresh-keeping space, and the vacuum pump 22 may be disposed outside the drawer body 10. Wherein, when in use, at least one side of the nitrogen-oxygen separation membrane module 21 that blocks the nitrogen circulation should be ensured to be located in the drawer body 10, and it is also feasible that the whole nitrogen-oxygen separation membrane module 21 is located in the drawer body 10. The vacuum pump 22 is arranged outside the drawer body 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 body 10 or a position far away from the drawer body 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. In addition, the vacuum pump 22 may be disposed inside the drawer body 10, and the vacuum pump 22 may exhaust oxygen from the drawer body 10 through an exhaust pipe.
Alternatively, as shown in fig. 1, the nitrogen-oxygen separation membrane module 20 includes an exhaust pipe 24, and the exhaust pipe 24 is disposed at an exhaust end of the vacuum pump 22. Oxygen can be vented to a desired location through the vent tube 24, which may be external to the refrigerator.
In the technical solution of this embodiment, the nitrogen-oxygen separation membrane module 21 includes a plurality of stacked nitrogen-oxygen separation membranes therein, and the exhaust tube 23 is respectively communicated with the oxygen filtration sides of the plurality of nitrogen-oxygen separation membranes. It should be noted that the oxygen reduction principle of the nitrogen-oxygen separation membrane is dissolution-diffusion, oxygen and nitrogen have different dissolution rates and passing rates on the nitrogen-oxygen separation membrane, 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 is discharged at the oxygen-rich end, so that the effect of rapid oxygen reduction is realized, and the purpose of preservation is achieved.
The invention also provides a fresh-keeping refrigerator which comprises the air-conditioning drawer. By adopting the air-conditioning drawer, the internal and external pressure difference of the drawer body 10 can be reduced, the drawer body 10 is prevented from deforming under the pressure difference, the basic appearance of the drawer body 10 is ensured, and the normal use of the fresh-keeping refrigerator is ensured.
According to the content, the preservation refrigerator provided by the invention is additionally provided with the air pressure adjustable component aiming at the problems that the drawer deforms and forms negative pressure in the active air-conditioning preservation process, so that the balance of the air pressure inside and outside the drawer is ensured or micro positive pressure is formed. The air can be adjusted to effectively keep the freshness of the refrigerated food. In addition, the problem of drawer deformation and negative pressure generation is solved, and the drawer is easy to push and pull and is safe.
Example 2
Fig. 2 is a flowchart of a modified atmosphere control method of a refrigerator according to an embodiment of the present invention, as shown in fig. 2, the method includes the following steps:
step S201, monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer in the drawer closing state.
Before the detection, whether the drawer is completely closed needs to be detected, and if the drawer is completely closed, the oxygen concentration of the drawer and the pressure difference between the inside and the outside of the drawer are triggered and monitored; otherwise, prompting the user to close the drawer. Thereby guarantee that this scheme is carried out under sealed drawer state to guarantee the monitoring effect. The internal and external pressure difference refers to the internal pressure value of the drawer-the external pressure value of the drawer.
And S202, controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel according to the oxygen concentration and the internal and external pressure difference. Note that the vacuum pump is initially in an off state.
In specific implementation, the opening and closing of the vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of the air inlet of the air pipeline channel are controlled according to the oxygen concentration and the internal and external pressure difference, which can be specifically realized by the following two preferred embodiments:
the first embodiment:
1) and if the oxygen concentration is larger than a first preset value (for example, 5 percent), controlling the vacuum pump to operate according to the preset flow rate until the oxygen concentration is smaller than or equal to the first preset value.
2) If the oxygen concentration is less than or equal to the first preset value and less than or equal to the second preset value (for example, 1 percent), the opening and closing of the air inlet of the air pipeline passage are further controlled according to the internal and external pressure difference.
Specifically, if the third preset value is less than or equal to the internal-external pressure difference and less than or equal to the fourth preset value, it indicates that the internal-external pressure difference of the drawer is in a proper range, and the internal-external pressure of the drawer is balanced or forms a micro-positive pressure, the current state is kept unchanged.
If the internal and external pressure difference is less than the third preset value (for example, 0MPa), it indicates that negative pressure is formed in the drawer at this time, which easily causes deformation of the drawer and inconvenience in pushing and pulling the drawer, and therefore, it is necessary to control the opening of the air inlet of the air pipeline channel until the internal and external pressure difference is greater than or equal to the third preset value, and then close the air inlet.
If the internal and external pressure difference is larger than the fourth preset value (for example 0.001MPa), which indicates that the internal pressure of the drawer is larger than the external pressure of the drawer excessively, the oxygen concentration of the drawer and the internal and external pressure difference of the drawer are monitored again, and the vacuum pump is started to pump air so as to adjust the internal and external pressure difference.
3) If the oxygen concentration is less than the second preset value, the oxygen concentration in the drawer is lower at the moment, the air inlet of the air pipeline channel can be controlled to be opened, air circulation inside and outside the drawer is realized, and therefore the oxygen concentration is increased as soon as possible.
The first embodiment is that the vacuum pump is firstly regulated and controlled according to the oxygen concentration, so that the oxygen concentration in the drawer is in a more appropriate range [ a second preset value, a first preset value ]; after that, the air inlet of the air pipeline channel is further regulated and controlled according to the internal and external pressure difference, so that the drawer is prevented from being deformed due to overlarge internal and external pressure difference. It should be noted that the above numerical values are merely illustrative and are not particularly limited.
The second embodiment:
1) if the internal and external pressure difference is less than or equal to the third preset value and less than or equal to the fourth preset value, the internal and external pressure difference is in a proper range, the internal and external air pressure of the drawer is balanced or forms micro-positive pressure, and the internal and external pressure difference does not need to be adjusted. Further controlling the opening and closing of the vacuum pump according to the oxygen concentration.
If the oxygen concentration is larger than the first preset value, the oxygen concentration in the drawer is higher, the vacuum pump is controlled to operate according to the preset flow, and oxygen is reduced in an active air adjusting mode until the oxygen concentration is smaller than or equal to the first preset value;
if the oxygen concentration is less than or equal to the first preset value and is less than or equal to the second preset value, the oxygen concentration in the drawer is more appropriate at the moment, and the current state is kept unchanged;
if the oxygen concentration is less than the second preset value, the oxygen concentration in the drawer is low, the air inlet of the air pipeline channel is controlled to be opened, air circulation inside and outside the drawer is achieved, and therefore the oxygen concentration is increased as soon as possible.
2) If the internal and external pressure difference is less than the third preset value, the negative pressure is formed in the drawer at the moment, the drawer is easy to deform, and the drawer is inconvenient to push and pull, so that the air inlet of the air pipeline channel needs to be controlled to be opened, and the air inlet is closed until the internal and external pressure difference is greater than or equal to the third preset value.
3) If the internal and external pressure difference is larger than the fourth preset value, which indicates that the internal pressure of the drawer is larger than the external pressure of the drawer too much, the oxygen concentration of the drawer needs to be monitored, and the vacuum pump is controlled to be opened and closed according to the oxygen concentration. If the pressure in the drawer is higher due to the fact that the oxygen concentration in the drawer is too high, the vacuum pump is started to pump air so as to adjust the internal and external pressure difference.
The second implementation mode is that firstly, the air inlet of the air pipeline channel is regulated and controlled relatively according to the internal and external pressure difference so as to ensure the balance of the internal and external air pressures of the drawer or form micro positive pressure and avoid the deformation of the drawer due to the overlarge internal and external pressure difference; after that, further carry out relevant regulation and control to the vacuum pump according to oxygen concentration to make the oxygen concentration in the drawer be in comparatively suitable scope, promote the fresh-keeping effect of drawer.
Example 3
Fig. 3 is a detailed flowchart of a modified atmosphere control method of a refrigerator according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
step S301, the user starts the air conditioning function.
Step S302, checking whether the drawer is closed, if not, executing step S303, and if so, executing step S304.
Step S303, reminding the user to close the drawer.
Step S304, monitoring the oxygen concentration in the drawer, and assuming that the optimal oxygen concentration interval for ensuring the freshness of the vegetables and fruits in the drawer is 1% -5%.
In step S305, the oxygen concentration CO2 is greater than 5%, which indicates that the oxygen concentration in the drawer is high at this time, and the active atmosphere control is required to be started to reduce oxygen, so that the vacuum pump is controlled to be started, V is 6L/min until the oxygen concentration is reduced to the above-mentioned optimal oxygen concentration interval, and then step S307 is executed.
In step S306, CO2 is more than or equal to 1% and less than or equal to 5%, which indicates that the oxygen concentration in the drawer is proper at this time, the step S307 is further executed.
Step S307, the internal and external pressure difference Δ P of the drawer is monitored (Δ P is the internal pressure of the drawer — the external pressure of the drawer), and it is assumed that the suitable internal and external pressure difference range in the drawer is 0 to 0.001MPa
In step S308, if Δ P > 0.001MPa, the process returns to step S304.
Step S309, if delta P is more than or equal to 0MPa and less than or equal to 0.001MPa, the pressure inside and outside the drawer is balanced at the moment, and the current state is kept.
In step S310, if Δ P < 0MPa, the air intake hole of the air pipeline channel is opened (for example, the baffle is opened), and then the step S304 is executed in a return mode.
And step S311, if the CO2 is less than 1%, opening an air inlet of the air pipeline channel.
This embodiment detects oxygen concentration through the oxygen concentration detector in the drawer, carries out relevant regulation and control to the vacuum pump according to oxygen concentration to make oxygen concentration in the drawer be in comparatively suitable scope, promote the fresh-keeping effect of drawer. After that, the pressure difference between the inside and the outside of the drawer is detected through the pressure sensor, and the air inlet of the air pipeline channel is regulated and controlled according to the pressure difference between the inside and the outside, so that the balance of the air pressure inside and outside the drawer is ensured or micro positive pressure is formed, and the deformation of the drawer due to overlarge pressure difference between the inside and the outside is avoided.
Based on the technical scheme described in the embodiment, the linkage control of the nitrogen-oxygen separation membrane component and the air inlet opening and closing of the air pipeline channel is realized, the gas concentration of the drawer can be adjusted to effectively keep the freshness of the refrigerated food, the problems of deformation and negative pressure generation of the drawer can be solved, and the drawer is easy to push and pull and is safe.
Example 4
Fig. 4 is a detailed flowchart of another modified atmosphere control method of a refrigerator according to an embodiment of the present invention, as shown in fig. 4, the method includes the following steps:
step S401, the user starts the air adjusting function.
Step S402, checking whether the drawer is closed, if not, executing step S403, and if so, executing step S404.
Step S403, reminding the user to close the drawer.
Step S404, an internal and external pressure difference Δ P of the drawer is monitored (Δ P is the internal pressure of the drawer — the external pressure of the drawer), and it is assumed that an appropriate internal and external pressure difference range in the drawer is 0 to 0.001 MPa.
In step S405, if Δ P > 0.001MPa, it indicates that the pressure in the drawer is large, which is probably caused by too high oxygen concentration in the drawer, and therefore step S407 is performed.
And S406, if delta P is more than or equal to 0MPa and less than or equal to 0.001MPa, the internal and external pressures of the drawer are balanced at the moment, and the current state is kept. Step S407 is then executed.
Step S407, monitoring the oxygen concentration in the drawer, and assuming that the optimal oxygen concentration interval for ensuring the freshness of the vegetables and fruits in the drawer is 1% -5%.
In step S408, the oxygen concentration CO2 is greater than 5%, which indicates that the oxygen concentration in the drawer is higher and the active atmosphere control is required to be started, so that the vacuum pump is controlled to be started, V is 6L/min until the oxygen concentration falls to the above-mentioned optimal oxygen concentration interval, and then step S407 is executed.
And step S409, setting the CO2 to be more than or equal to 1% and less than or equal to 5%, which indicates that the oxygen concentration in the drawer is proper at the moment and the current state is kept unchanged.
And step S410, if the CO2 is less than 1%, opening an air inlet of the air pipeline channel.
In step S411, if Δ P < 0MPa, the intake hole of the air line channel is opened (e.g., the damper is opened), and then the process returns to step S404.
According to the embodiment, the internal and external pressure difference of the drawer is detected through the pressure sensor, and relevant regulation and control are performed on the air inlet hole of the air pipeline channel according to the internal and external pressure difference, so that the internal and external air pressure of the drawer is balanced or micro-positive pressure is formed, and the deformation of the drawer due to the overlarge internal and external pressure difference is avoided. After that, detect oxygen concentration through the oxygen concentration detector in the drawer, carry out relevant regulation and control to the vacuum pump according to oxygen concentration to make oxygen concentration in the drawer be in comparatively suitable scope, promote the fresh-keeping effect of drawer.
Based on the technical scheme described in the embodiment, the linkage control of the nitrogen-oxygen separation membrane component and the air inlet opening and closing of the air pipeline channel is realized, the gas concentration of the drawer can be adjusted to effectively keep the freshness of the refrigerated food, the problems of deformation and negative pressure generation of the drawer can be solved, and the drawer is easy to push and pull and is safe.
Example 5
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 the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the controlled atmosphere control method of the 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.
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 (13)
1. A controlled atmosphere control method for a refrigerator, the method comprising:
monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer in a closed state of the drawer;
controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel according to the oxygen concentration and the internal and external pressure difference; which comprises the following steps: if the oxygen concentration is greater than a first preset value, controlling the vacuum pump to operate according to a preset flow until the oxygen concentration is less than or equal to the first preset value; if the oxygen concentration is less than or equal to the first preset value and less than or equal to the second preset value, the opening and closing of an air inlet of the air pipeline channel are further controlled according to the internal and external pressure difference; if the oxygen concentration is less than a second preset value, controlling an air inlet of the air pipeline channel to be opened;
the nitrogen-oxygen separation membrane module comprises a vacuum pump and a nitrogen-oxygen separation membrane module which is arranged on the drawer and is used for separating nitrogen and oxygen, and the vacuum pump is used for pumping the oxygen in the drawer through the nitrogen-oxygen separation membrane module; the air pipeline channel is positioned in the drawer and is used for communicating the fresh-keeping space and the external space of the drawer.
2. The method of claim 1, wherein if the oxygen concentration is less than or equal to a first predetermined value and less than or equal to a second predetermined value, controlling opening and closing of an air inlet of the air pipeline channel further according to the difference between the internal pressure and the external pressure comprises:
if the internal and external pressure difference is less than or equal to a third preset value and less than or equal to a fourth preset value, keeping the current state unchanged;
if the internal and external pressure difference is less than a third preset value, controlling the air inlet of the air pipeline channel to be opened;
and if the internal and external pressure difference is larger than a fourth preset value, monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer again.
3. The method of any of claims 1-2, wherein prior to monitoring the oxygen concentration of the drawer and the pressure differential between the inside and the outside of the drawer, the method further comprises:
detecting whether the drawer is completely closed;
if yes, triggering and monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer;
otherwise, prompting the user to close the drawer.
4. A controlled atmosphere control method for a refrigerator, the method comprising:
monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer in a closed state of the drawer;
controlling the opening and closing of a vacuum pump in the nitrogen-oxygen separation membrane module and the opening and closing of an air inlet of an air pipeline channel according to the oxygen concentration and the internal and external pressure difference; which comprises the following steps:
if the internal and external pressure difference is less than or equal to a third preset value and less than or equal to a fourth preset value, controlling the opening and closing of the vacuum pump further according to the oxygen concentration; if the internal and external pressure difference is less than a third preset value, controlling the air inlet of the air pipeline channel to be opened, and closing the air inlet until the internal and external pressure difference is greater than or equal to the third preset value; if the internal and external pressure difference is larger than a fourth preset value, controlling the opening and closing of the vacuum pump according to the oxygen concentration;
the nitrogen-oxygen separation membrane module comprises a vacuum pump and a nitrogen-oxygen separation membrane module which is arranged on the drawer and is used for separating nitrogen and oxygen, and the vacuum pump is used for pumping the oxygen in the drawer through the nitrogen-oxygen separation membrane module; the air pipeline channel is positioned in the drawer and is used for communicating the fresh-keeping space and the external space of the drawer.
5. The method of claim 4, wherein controlling the vacuum pump to open and close further in accordance with the oxygen concentration comprises:
if the oxygen concentration is greater than a first preset value, controlling the vacuum pump to operate according to a preset flow until the oxygen concentration is less than or equal to the first preset value;
if the oxygen concentration is less than or equal to the first preset value and less than or equal to the second preset value, keeping the current state unchanged;
and if the oxygen concentration is less than a second preset value, controlling the air inlet of the air pipeline channel to be opened.
6. The method of any of claims 4 to 5, wherein prior to monitoring the oxygen concentration of the drawer and the pressure differential between the inside and the outside of the drawer, the method further comprises:
detecting whether the drawer is completely closed;
if yes, triggering and monitoring the oxygen concentration of the drawer and the internal and external pressure difference of the drawer;
otherwise, prompting the user to close the drawer.
7. A modified atmosphere drawer for implementing the modified atmosphere control method of the refrigerator of any one of claims 1 to 3 or the modified atmosphere control method of the refrigerator of any one of claims 4 to 6, comprising:
the drawer comprises a drawer body, wherein a fresh-keeping space which is relatively isolated from air is formed in the drawer body;
a nitrogen-oxygen separation membrane module comprising: the nitrogen-oxygen separation membrane module is arranged on the drawer body and is used for separating nitrogen and oxygen; the vacuum pump is used for pumping oxygen in the fresh-keeping space through the nitrogen-oxygen separation membrane module;
the one-way valve assembly is arranged on the drawer body, the check direction of the one-way valve assembly is from the fresh-keeping space to the external space, and when the difference value between the air pressure of the fresh-keeping space and the air pressure of the external space is larger than a set threshold value, the air in the external space enters the fresh-keeping space through the one-way valve assembly.
8. The modified atmosphere drawer of claim 7, wherein the one-way valve assembly comprises:
the ventilation component is arranged on the drawer body and is used for communicating the fresh-keeping space with the external space;
and a check valve member mounted on the vent member.
9. The modified atmosphere drawer of claim 8, wherein the one-way valve member is a baffle mounted on the vent of the vent member in communication with the crisper space, the baffle comprising a first position in which the baffle stops on the vent preventing gas from passing from the crisper space to the ambient space, and a second position in which the baffle is opened by gas to allow gas to pass from the ambient space to the crisper space.
10. The modified atmosphere drawer of claim 9, wherein the vent member is a bent tube disposed at the top of the drawer body, the flap is hinged to the vent, and the flap is maintained in the first position under the force of gravity.
11. A modified atmosphere drawer according to claim 9 wherein the venting means is a vent tube or vent hole provided in the side of the drawer body and the flap is hinged to the vent opening, the flap being maintained in the first position under the influence of gravity.
12. A crisper comprising a modified atmosphere drawer, wherein the modified atmosphere drawer is according to any one of claims 7 to 11.
13. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method of one of claims 1 to 3, or the method of one of claims 4 to 6.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0618152A (en) * | 1992-07-03 | 1994-01-25 | Toshiba Corp | Refrigerator |
| CN101766321B (en) * | 2008-12-30 | 2012-10-24 | 苏州三星电子有限公司 | Ultra-long-term freshness preserving system |
| CN101948029A (en) * | 2010-07-13 | 2011-01-19 | 海尔集团公司 | Vacuum preservation device, refrigerator and control method of vacuum preservation device |
| CN101949630A (en) * | 2010-09-27 | 2011-01-19 | 合肥美的荣事达电冰箱有限公司 | Refrigerator refreshing system and refrigerator with same |
| CN103851863B (en) * | 2012-12-03 | 2017-09-12 | 博西华电器（江苏）有限公司 | Refrigerator and the method for refrigerator food fresh-keeping |
| US20170292764A1 (en) * | 2016-04-12 | 2017-10-12 | Michael D. Newman | Cryogenic exhaust control system and freezer having same |
| CN106766565B (en) * | 2016-12-02 | 2020-08-28 | 青岛海尔股份有限公司 | Refrigerator with a door |
| CN106766511B (en) * | 2016-12-02 | 2023-08-15 | 海尔智家股份有限公司 | Storage device with fresh-keeping and living-storage functions |
| CN106524630A (en) * | 2016-12-09 | 2017-03-22 | 青岛海尔股份有限公司 | Refrigerator and storage container for refrigerator |
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