CN106642913B

CN106642913B - Refrigerating and freezing device

Info

Publication number: CN106642913B
Application number: CN201611097450.2A
Authority: CN
Inventors: 刘浩泉; 姜波; 王磊; 辛若武
Original assignee: Qingdao Haier Co Ltd
Current assignee: Dalian Haier refrigerator Co., Ltd.; Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2016-12-02
Filing date: 2016-12-02
Publication date: 2020-06-23
Anticipated expiration: 2036-12-02
Also published as: CN106642913A

Abstract

The present invention provides a refrigerating and freezing apparatus, comprising: a box body, wherein a storage space is limited in the box body; the first closed assemblies are arranged in the storage space, the preservation subspaces are respectively limited in the first closed assemblies, the first closed assemblies are respectively provided with an oxygen-enriched membrane assembly, the surrounding space of the oxygen-enriched membrane assembly is communicated with the preservation subspaces, and an oxygen-enriched gas collecting cavity is formed in the oxygen-enriched membrane assembly; the air suction pump is provided with an air inlet end which is respectively communicated to the oxygen-enriched air collecting cavities of the first closed assemblies through air suction pipelines and is configured to suck the air in the oxygen-enriched air collecting cavities outwards, so that the oxygen concentration in the fresh-keeping subspace is reduced; one or more second closed components are also arranged in the storage space, a keep-alive sub-space is defined in the storage space, and the keep-alive sub-space is respectively communicated to the air outlet end of the air pump through an exhaust pipeline to receive the gas from the oxygen-enriched gas collecting cavity, so that a gas atmosphere with the oxygen concentration higher than 70% and favorable for fresh keeping is formed.

Description

Refrigerating and freezing device

Technical Field

The invention relates to the technical field of storage, in particular to a refrigerating and freezing device.

Background

Food is an energy source for human life and is vital for people. For food storage, the main two aspects are heat preservation and fresh keeping, generally speaking, the temperature has obvious influence on the microbial activity on food and the action of enzyme in food, the food is delayed to deteriorate due to the temperature reduction, and a refrigerator is a refrigeration device for keeping constant low temperature and is also a civil product for keeping constant low temperature and cold state of food or other articles.

With the improvement of life quality, the requirements of consumers on the preservation of stored foods are higher and higher, and especially the requirements on the color, the taste and the like of the foods are higher and higher. Thus, the stored food should also ensure that the colour, mouthfeel, freshness etc. of the food remains as constant as possible during storage. Therefore, users also put higher demands on the preservation technology of the refrigerator.

Particularly, some consumers also put forward special requirements on the fresh-keeping requirements of aquatic products at present, and fresh and live aquatic products are also visible everywhere even in inland regions deviating from the coast at present. However, fresh and live aquatic products (such as live fish, live shrimp, live crab and the like) cannot be kept alive and stored in the prior art, and need to be cooked as soon as possible, which brings great inconvenience to users and influences consumers to enjoy the fresh and live aquatic products.

Disclosure of Invention

It is an object of the present invention to provide a refrigeration and freezing apparatus that provides a live storage function.

A further object of the present invention is to provide a refrigeration freezer that also improves the preservation of vegetables and fruits.

The present invention first provides a refrigerating and freezing apparatus, comprising: a box body, wherein a storage space is limited in the box body; the first sealing assemblies are arranged in the storage space, and freshness keeping sub-spaces are respectively limited in the first sealing assemblies; each first closed component is respectively provided with an oxygen-enriched membrane component, an oxygen-enriched membrane is arranged in each oxygen-enriched membrane component, the surrounding space of each oxygen-enriched membrane component is communicated with the fresh-keeping subspace, and an oxygen-enriched gas collecting cavity is formed in each oxygen-enriched membrane component; the air suction pump is provided with an air inlet end which is respectively communicated to the oxygen-enriched air collecting cavities of the first closed assemblies through the air suction pipeline and is configured to suck air in the oxygen-enriched air collecting cavities outwards so that at least part of oxygen in the fresh-keeping sub-spaces of the first closed assemblies enters the oxygen-enriched air collecting cavities through the oxygen-enriched films, and therefore the oxygen concentration in the fresh-keeping sub-spaces of the first closed assemblies is reduced; one or more second closed components are also arranged in the storage space, a keep-alive subspace is limited in the storage space and is respectively communicated to the air outlet end of the air pump through an exhaust pipeline to receive the gas from the oxygen-enriched gas collecting cavity, and therefore a gas atmosphere which is beneficial to fresh keeping and keep alive and has the oxygen concentration higher than 70% is formed in the keep-alive subspace.

Optionally, the refrigeration and freezing apparatus further comprises: the first valve assembly is arranged in the air extraction pipeline and is configured to adjust the on-off state of the air extraction pump and the plurality of first closed assemblies; and the second valve assembly is arranged in the exhaust pipeline and is configured to adjust the on-off state of the air suction pump and the second sealing assembly.

Optionally, the first valve assembly comprises a plurality of air inlets and an air outlet, each air inlet of the first valve assembly is communicated to the oxygen-enriched gas collecting cavity of one first closed assembly, the air outlet of the first valve assembly is communicated to the air inlet end of the air pump, and the air inlets and the air outlet of the first valve assembly are controlled to be switched on and off respectively, so that the on-off state of the air pump and the first closed assemblies is changed.

Optionally, the second sealing assembly is provided in plurality, and the second valve assembly includes a plurality of air outlets and an air inlet, the air inlet of the second valve assembly is communicated to the air outlet end of the air pump, each air outlet of the second valve assembly is respectively communicated to one second sealing assembly, and the plurality of air outlets and the one air inlet of the second valve assembly are respectively controlled to be switched on and off, so as to change the on-off state of the air pump and the plurality of second sealing assemblies.

Optionally, the refrigeration and freezing apparatus further comprises: the first gas detection device is arranged in the fresh-keeping subspace and is configured to detect the gas atmosphere index in the fresh-keeping subspace; the second gas detection device is arranged in the keep-alive subspace and is configured to detect the gas atmosphere index in the keep-alive subspace; and the suction pump is further configured to be turned on or off according to the detection results of the first gas detection means and the second gas detection means.

Optionally, the first valve assembly is further configured to adjust the on-off state of the air suction pump and the plurality of first sealing assemblies according to the gas atmosphere index in the fresh keeping subspace; and the second valve assembly is also configured to adjust the on-off state of the air pump and the plurality of second airtight assemblies according to the gas atmosphere index in the keep-alive subspace.

Alternatively, the air suction pump is disposed in a compressor compartment of the refrigerating and freezing device, and the air suction pipeline and the air exhaust pipeline are respectively embedded in a foaming layer of the refrigerating and freezing device.

Optionally, each first closing assembly comprises: the first drawer cylinder is provided with a forward opening and is arranged in the storage space; the first drawer body is slidably installed in the first drawer cylinder body so as to be operably drawn out from the forward opening of the first drawer cylinder body and inserted inwards, the end plate of the first drawer body and the forward opening of the first drawer cylinder body form a sealing structure, and a fresh keeping subspace is formed in the first drawer body.

Optionally, an accommodating cavity communicated with the fresh keeping subspace is arranged in the top wall of the first drawer cylinder body, so that the oxygen-enriched membrane component can be arranged; at least one first vent hole and at least one second vent hole which is arranged at intervals with the at least one first vent hole are arranged in the wall surface between the accommodating cavity of the top wall of the first drawer cylinder and the fresh-keeping subspace so as to respectively communicate the accommodating cavity and the fresh-keeping subspace at different positions; the refrigerating and freezing device further comprises a fan which is arranged in the accommodating cavity so as to promote the formation of airflow which sequentially passes through the at least one first vent hole, the accommodating cavity and the at least one second vent hole and returns to the fresh-keeping subspace. .

Optionally, the second containment assembly comprises: the second drawer cylinder is provided with a forward opening and is arranged in the storage space; a second drawer body slidably mounted within the second drawer barrel to be operatively withdrawn outwardly from and inserted inwardly into the forward opening of the second drawer barrel, and an end plate of the second drawer body forming a sealing structure with the forward opening of the second drawer barrel, a keep-alive subspace being formed within the second drawer body.

The invention relates to a refrigerating and freezing device which creatively provides a method for discharging oxygen in air in a sealed fresh-keeping subspace by adopting an oxygen-enriched membrane component, thereby obtaining a gas atmosphere which is rich in nitrogen and poor in oxygen and is beneficial to food fresh keeping in the fresh-keeping subspace. In the nitrogen-rich and oxygen-poor gas atmosphere, the oxygen content in the fruit and vegetable storage space is reduced, the aerobic respiration intensity of the fruit and vegetable is reduced, the basic respiration is ensured, and the fruit and vegetable is prevented from anaerobic respiration, so that the aim of keeping the fruit and vegetable fresh for a long time is fulfilled. Meanwhile, oxygen separated out by the oxygen-enriched membrane component is supplied to the closed keep-alive subspace, so that the oxygen concentration of the keep-alive subspace reaches more than 70% of that of the aquatic product which can keep alive for a long time. Therefore, the oxygen-enriched membrane component can simultaneously provide gas atmosphere for the fresh keeping subspace of fruit and vegetable fresh keeping and the keep-alive subspace for realizing the keep-alive of fresh aquatic products, thereby enriching the food fresh keeping requirements of users.

Furthermore, the refrigerating and freezing device can maintain the gas atmosphere of the fresh-keeping subspace and the keep-alive subspace by adjusting the working states of the air suction pump, the air exhaust pipeline and the air suction pipeline.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic structural view of a refrigeration and freezing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a cabinet of a refrigerating and freezing apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of another perspective of the structure shown in FIG. 2;

fig. 4 is a schematic partial structural view of a first enclosure assembly of a refrigeration freezer apparatus in accordance with one embodiment of the invention;

FIG. 5 is a schematic exploded view of the structure shown in FIG. 4;

FIG. 6 is an exploded view of an oxygen-rich membrane module in a refrigerated freezer in accordance with one embodiment of the invention;

fig. 7 is a schematic block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention; and

figure 8 is a schematic piping connection for a refrigeration chiller according to one embodiment of the present invention.

Detailed Description

The refrigeration and freezing device of the embodiment of the invention adopts the gas regulating film to form a gas atmosphere meeting the storage and the preservation of the articles in the fresh sub-space, for example, adopts the oxygen-rich film to form the gas atmosphere rich in oxygen and poor in nitrogen. The working principle of the oxygen-enriched membrane is that oxygen in the air preferentially passes through the oxygen-enriched membrane under the driving of pressure difference by utilizing the difference of permeation rates of all components in the air when the components penetrate through the oxygen-enriched membrane. In the embodiment of the invention, the refrigerating and freezing device discharges oxygen by using the oxygen-enriched film, so that the oxygen concentration in the fresh-keeping subspace is reduced, and the gas atmosphere beneficial to food preservation is realized.

In this embodiment, the modified atmosphere technology extends the shelf life of food by adjusting the atmosphere (gas component ratio or gas pressure) of the enclosed space where the stored food is located, and the basic principle is as follows: in a certain closed space (the fresh-keeping sub-space 271), a gas atmosphere different from the normal air composition is obtained through various regulation modes, so as to inhibit the physiological and biochemical processes and the activities of microorganisms which cause the putrefaction and the deterioration of stored objects (generally foods). In particular, in the present embodiment, the modified atmosphere in question will be directed specifically to modified atmosphere techniques for adjusting the gas component ratios.

As is known to those skilled in the art, the normal air composition includes (in volume percent, the same applies hereinafter): nitrogen of about 78%, oxygen of about 21%, rare gases of about 0.939% (helium, neon, argon, krypton, xenon, radon), carbon dioxide of 0.031%, and other gases and impurities of 0.03% (e.g., ozone, nitrogen monoxide, nitrogen dioxide, water vapor, etc.) in the modified atmosphere field, it is common to fill a closed space with a nitrogen-rich gas to reduce the oxygen content to obtain a nitrogen-rich and oxygen-poor fresh-keeping gas atmosphere.

Although controlled atmosphere technology exists in the prior art, the history dates back to 1821, German biologists found that fruits and vegetables can reduce the onset of metabolism at low oxygen levels. However, until now, the technology has been limited to use in large professional storage facilities (storage capacity is typically at least 30 tons) due to the large size and high cost of the nitrogen generating equipment traditionally used for modified atmosphere preservation. Therefore, in the prior art, the vacuum preservation technology is still generally adopted in small-sized refrigeration and freezing equipment such as refrigerators and the like.

In the present embodiment, the oxygen-enriched membrane module is economically applied to a small-sized refrigerating and freezing facility such as a refrigerator by miniaturizing and silencing the air-conditioning system, and forms a freshness-keeping gas atmosphere of fruits and vegetables and also forms a keep-alive gas atmosphere by making full use of discharged oxygen. In addition, because the oxygen concentration required by the keep-alive subspace is higher (up to 70% is required), a plurality of first sealing assemblies can be configured to supply oxygen to one or more second sealing assemblies.

In the present embodiment, the oxygen-enriched membrane module is economically applied to a small-sized refrigerating and freezing facility such as a refrigerator by miniaturizing and silencing the air-conditioning system, and forms a freshness-keeping gas atmosphere of fruits and vegetables and also forms a keep-alive gas atmosphere by making full use of discharged oxygen.

Fig. 1 is a schematic structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention, fig. 2 is a schematic structural view of a cabinet 20 of the refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 3 is a schematic structural view of another view of the structure shown in fig. 2. As shown, the refrigerating and freezing apparatus of the present embodiment may include a box 20, a door (not shown), an oxygen-enriched membrane assembly 30, an air pump 40, and a refrigeration system (not shown). The refrigerator-freezer 20 has a storage space defined therein, and the storage space may be configured as a refrigerating chamber 27, a freezing chamber 25, a temperature-changing chamber 26, and the like, according to a refrigerating temperature. The refrigerating and freezing device may be a refrigerator having at least a refrigerating chamber 27 and a freezing chamber 25. The refrigeration system may be a conventional compression refrigeration system or a semiconductor refrigeration system or the like that provides refrigeration to the storage compartment, for example, by direct and/or air cooling, to provide the storage compartment with a desired storage temperature. In some embodiments, the storage temperature of the refrigerator cold room 27 may be 2-9 ℃, or may be 4-7 ℃; the preservation temperature of the freezing chamber 25 can be-22 to-14 ℃, or can be-20 to 16 ℃. Freezing chamber 25 is provided below refrigerating chamber 27, and variable temperature chamber 26 is provided between freezing chamber 25 and refrigerating chamber 27. The temperature in the freezing chamber 25 is generally in the range of-14 ℃ to-22 ℃. The temperature-changing chamber 26 can be adjusted as needed to store the appropriate food.

A plurality of first closing members 71 and one or more second closing members 72 may be provided in the storage space. Wherein each first containment assembly 71 defines a freshness subspace 271 therein and the second containment assembly 72 defines a keep alive subspace 272 therein. The first closing unit 71 and the second closing unit 72 may be disposed in any of the above-described compartments, may be disposed in the same compartment at the same time, or may be disposed in different compartments. When the first and

second sealing units

71 and 72 are disposed in the same compartment, another plurality of first sealing units 71 may be disposed in the same compartment or different compartments, and the plurality of first sealing units 71 may be arranged vertically or horizontally, and in the embodiment of the present invention, the first and

second sealing units

71 and 72 may be disposed according to the space and the use requirement of the refrigeration and freezing apparatus. For example, the first sealing member 71 and the second sealing member 72 may be arranged in the refrigerating chamber 27, and for example, a part of the first sealing member 71 may be arranged in the refrigerating chamber 27, and another part of the first sealing member 71 may be arranged in the temperature-changing chamber 26, and similarly, the second sealing member 72 may be provided in the refrigerating chamber 27 or the temperature-changing chamber 26 as needed.

The door body is pivotally mounted to the cabinet 20 and configured to open or close a storage space defined by the cabinet 20. In order to ensure the sealing performance of the fresh-keeping subspace 271 and the keep-alive subspace 272, a small door can be further arranged on the inner side of the door body to open or close the fresh-keeping subspace 271 and the keep-alive subspace 272, so that a double-layer door structure is formed.

The refrigeration system may be a refrigeration cycle system constituted by a compressor, a condenser, a throttle device, an evaporator, and the like. The compressor is mounted within the compressor compartment 24. The evaporator is configured to directly or indirectly provide cooling energy into the storage space. For example, when the refrigerating and freezing apparatus is a compression-type direct-cooling refrigerator for home use, the evaporator may be provided outside or inside the rear wall surface of the inner container 21. When the refrigerating and freezing device is a household compression type air-cooled refrigerator, the refrigerator body 20 is also internally provided with an evaporator chamber, the evaporator chamber is communicated with the storage space through an air path system, an evaporator is arranged in the evaporator chamber, and a fan is arranged at an outlet of the evaporator chamber so as to perform circulating refrigeration on the storage space. Since such refrigeration systems themselves are well known and readily implemented by those skilled in the art, further description of the refrigeration system itself is omitted herein so as not to obscure or obscure the inventive aspects of the present application.

In some embodiments, the refrigerator-freezer may further utilize a drawer structure to form the first and

second enclosures

71 and 72, respectively.

Taking a first sealing component 71 as an example, a drawer structure forming the fresh keeping sub-space 271 will be described. Fig. 4 is a schematic partial structural view of a first closing module 71 of a refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 5 is a schematic exploded view of the structure shown in fig. 4, and a drawer forming the first closing module 71 may have a first drawer cylinder 22 and a first drawer body 23. Thereby forming a fresh keeping subspace 271 by using the drawer type storage compartment. The first drawer cylinder 22 has a front opening and is disposed in the storage space (e.g., the lower portion of the refrigerating chamber 27), the first drawer body 23 is slidably mounted in the first drawer cylinder 22, and an end plate is disposed at the front end of the first drawer body 23 and is matched with the first drawer cylinder 22 to seal the opening of the fresh keeping subspace 271. In one particular manner, the first drawer body 23 is operatively drawn outwardly and pushed inwardly from the forward opening of the first drawer barrel 22. The end plate closes the opening of the freshness sub-space 271 by a sealing structure.

In some embodiments of the present invention, the opening of the first drawer cylinder 22 and the end plate of the first drawer body 23 may form a seal therebetween, and the seal may be properly deflated to achieve air pressure balance. In some other embodiments, the air pressure balance may be ensured by providing millimeter-sized micro-holes or one-way valves on the first drawer cylinder 22.

The drawer forming the second closure assembly 72 may be similarly constructed. For example, the second containment assembly 72 may include: a second drawer cylinder and a second drawer body. The second drawer cylinder is provided with a forward opening and is arranged in the storage space; the second drawer body is slidably mounted within the second drawer barrel for operable outward extraction and inward insertion from the forward opening of the second drawer barrel, and the end plate of the second drawer body forms a sealing arrangement with the forward opening of the second drawer barrel, forming an keep-alive sub-space 272 within the second drawer body. The difference is that the top of the defined keep-alive subspace 272 does not need to be provided with a structure for placing the oxygen-rich membrane module 30.

Oxygen-enriched membrane assembly 30 may be disposed within the barrel of first drawer barrel 22, preferably at the top wall of first drawer barrel 22. Specifically, the top wall of the first drawer cylinder 22 is provided with an accommodating cavity 31 communicated with the fresh keeping subspace 271. At least one first vent hole 222 and at least one second vent hole 223 spaced from the at least one first vent hole 222 are formed in the wall surface between the accommodating cavity 31 and the fresh keeping subspace 271 of the top wall of the first drawer cylinder 22 so as to respectively communicate the accommodating cavity 31 and the fresh keeping subspace 271 at different positions, and the accommodating cavity 31 and the fresh keeping subspace 271 are communicated through at least one first communication hole 222 and at least one second communication hole 223; the oxygen enrichment membrane module 30 is disposed in the housing chamber 31 and may be disposed above the at least one second communication hole 223. The accommodating chamber 31 constitutes a circulation space communicating with the fresh keeping sub-space 271 so that the oxygen-enriched film 36 in the oxygen-enriched film assembly 30 is in contact with the gas in the fresh keeping sub-space 271. The first communicating hole 222 and the second communicating hole 223 are small holes, and the number of the first communicating holes and the number of the second communicating holes can be multiple. In some alternative embodiments, the inside of the top wall of the first drawer barrel 22 has a recessed groove. The oxygen enrichment membrane assembly 30 is disposed in a recessed groove of the top wall of the first drawer cylinder 22.

In some embodiments of the present invention, in order to promote the gas flow in the fresh-keeping sub-space 271 and the accommodating cavity 31, a blower 60 may be further disposed in the accommodating cavity 31 of the first sealing member 71, wherein the blower 60 is configured to form a gas flow which sequentially passes through the at least one first vent hole, the accommodating cavity 31 and the at least one second vent hole and returns to the fresh-keeping sub-space, so as to promote the gas in the fresh-keeping sub-space 271 to enter the accommodating cavity 31 through the first communicating hole 222, and the gas in the accommodating cavity 31 to enter the fresh-keeping sub-space 271 through the second communicating hole 223, so as to form a gas flow through the oxygen-enriched film assembly 30.

The blower 60 is disposed above the at least one first communication hole 222 at a position of the accommodating chamber 31, and facilitates the gas in the fresh keeping subspace 271 to enter the accommodating chamber 31 through the at least one first communication hole 222, and enables the gas in the accommodating chamber 31 to enter the fresh keeping subspace 271 through the at least one second communication hole 223, so as to generate oxygen from the gas passing through the oxygen enrichment membrane assembly 30.

The fan 60 is preferably a centrifugal fan and may be disposed in the gas collection chamber 31 at the first communication hole 222. That is, the centrifugal fan 60 is located above the at least one first communication hole 222, and the air inlet is opposite to the first communication hole 222. The outlet of the centrifugal fan 60 may be directed towards the oxygen enrichment membrane assembly 30. The at least one second communication hole 223 may be located below the oxygen enrichment membrane assembly 30.

The top wall of the first drawer cylinder 22 includes a lower plate portion 224 and a cover plate portion 225, which together define the accommodating chamber 31, for example, the upper surface of the lower plate portion 224 may be formed with a recessed groove, and the cover plate portion 225 covers the recessed groove to form the accommodating chamber 31. At least one first communication hole 222 is provided in the front of the top wall and at least one second communication hole 223 is provided in the rear of the top wall. The centrifugal fan 60 is disposed at the front of the accommodating chamber 31, and the oxygen-enriched membrane assembly 30 is disposed at the rear of the accommodating chamber 31.

The oxygen enrichment membrane assembly 30 has an oxygen enrichment membrane 36 and an oxygen enrichment gas collection chamber with one side of the oxygen enrichment membrane 36 facing the oxygen enrichment gas collection chamber to allow oxygen in the air on the other side of the oxygen enrichment membrane 36 to permeate through the oxygen enrichment membrane 36 into the oxygen enrichment gas collection chamber when the pressure of the oxygen enrichment gas collection chamber is less than the pressure of the other side of the oxygen enrichment membrane 36. Specifically, the oxygen enrichment membrane assembly 30 can be in contact with the circulation flow channel (i.e. the accommodating chamber 31) communicated to the fresh keeping subspace 271, so that when the pressure of the oxygen enrichment gas collecting chamber is lower than that of the fresh keeping subspace 271, more oxygen in the gas in the accommodating chamber 31 (originating from the fresh keeping subspace 271) can penetrate through the oxygen enrichment membrane relative to the nitrogen in the airflow around the oxygen enrichment membrane assembly 30 and enter the oxygen enrichment gas collecting chamber, that is, more oxygen in the airflow formed by the fan 60 can penetrate through the oxygen enrichment membrane relative to the nitrogen and enter the oxygen enrichment gas collecting chamber. The plurality of first closing members 71 may have the same structure, and the specific dimensions may be the same or different according to the need.

Fig. 6 is an exploded view of an oxygen-rich membrane module 30 in a refrigerator freezer according to an embodiment of the present invention, wherein the oxygen-rich membrane module 30 may be in the form of a flat plate, and the oxygen-rich membrane module 30 may further include a support frame 32. The support frame 32 has a first surface and a second surface parallel to each other, and is formed with a plurality of gas flow passages extending on the first surface and the second surface, respectively, and penetrating the support frame to communicate the first surface and the second surface, the plurality of gas flow passages collectively forming an oxygen-enriched gas collecting chamber.

The oxygen-rich membrane 36 may be two layers, which are respectively laid on two sides of the supporting frame 32 to enclose the oxygen-rich gas collecting chamber, and each oxygen-rich membrane 36 may include one or more oxygen-rich membranes stacked together. The permeation of gas through the oxygen-enriched membrane 36 is a complex process, and the permeation mechanism is generally that gas molecules are first adsorbed to the surface of the oxygen-enriched membrane 36 to be dissolved, and then the gas is separated by the difference of dissolution and diffusion coefficients in the oxygen-enriched membrane 36. When the gas is enriched at the permeation side of the oxygen-enriched membrane 36 due to the pressure difference between the two sides of the oxygen-enriched membrane 36, the oxygen with high permeation rate is enriched, and then is gathered in the oxygen-enriched gas collection cavity.

The supporting frame 32 may include a frame, and rib plates and/or flat plates disposed in the frame, wherein airflow channels may be formed between the rib plates, between the rib plates and the flat plates, and grooves may be formed on the surface of the rib plates and the surface of the flat plates to form the airflow channels. The ribs and/or plates may improve the structural strength, etc., of the oxygen enrichment membrane assembly 30. That is, the support frame 32 has a first surface and a second surface parallel to each other, and a plurality of airflow passages communicating with the first surface and the second surface are formed inside. Two oxygen-rich membranes 36 are respectively laid on the first surface and the second surface of the support frame 32 to form an oxygen-rich gas collection chamber together with the plurality of gas flow channels of the support frame 32.

In some embodiments of the present invention, the support frame 32 includes a pumping hole 33 communicating with the plurality of gas flow passages, and disposed on the frame 32 to allow oxygen in the oxygen-enriched gas collection chamber to be output. The suction hole 33 communicates with the suction device 41. The oxygen-rich membrane 36 is first attached to the frame by the double-sided tape 34 and then sealed by the sealant 35.

In some embodiments, the plurality of gas flow passages formed inside the support frame 32 may be one or more cavities communicating with the suction holes 33. In some embodiments, the aforementioned plurality of airflow channels formed inside the support frame 32 may have a mesh structure.

Specifically, the supporting frame 32 may include a frame, and rib plates and/or flat plates disposed in the frame, wherein airflow channels may be formed between the rib plates, between the rib plates and the flat plates, and grooves may be formed on the surfaces of the rib plates and the surfaces of the flat plates to form the airflow channels. The ribs and/or plates may improve the structural strength, etc., of the oxygen enrichment membrane assembly 30.

For example, the support frame 32 has a first surface and a second surface parallel to each other, and the support frame 32 is formed with a plurality of airflow passages extending on the first surface, extending on the second surface, respectively, and penetrating the support frame 32 to communicate the first surface and the second surface. That is, the plurality of airflow channels include a plurality of first airflow channels extending over the first surface, a plurality of second airflow channels extending over the second surface, and a plurality of third airflow channels extending through the support frame 32 to communicate the first surface and the second surface. Alternatively, it is also understood that the support frame 32 is formed with a plurality of first air flow passages extending on the first surface and a plurality of second air flow passages extending on the second surface, and the first air flow passages and the second air flow passages communicate with each other through the third air flow passages. All the gas flow channels together form an oxygen-enriched gas collection chamber.

One or more oxygen-rich membranes form two planar oxygen-rich membrane layers, which are respectively laid on the first surface and the second surface of the support frame, thereby forming the flat-plate-shaped oxygen-rich membrane module 30.

The support frame 32 is formed with a pumping hole 33 communicating with the above-mentioned gas flow passage, and the pumping hole 33 communicates with the oxygen-enriched gas collection chamber for connecting the inlet end of the pumping pump 40, thereby allowing the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be outputted. When the air pump 40 is operated, the oxygen-enriched gas collection chamber 38 is under negative pressure, and oxygen in the air outside the oxygen-enriched membrane module 30 continuously permeates the oxygen-enriched membrane 36 and enters the oxygen-enriched gas collection chamber. The support frame 32 as a whole may be a substantially rectangular frame.

In some embodiments, the support frame 32 may include: the frame, a plurality of first floor and a plurality of second floor. The first ribbed plates are arranged in the frame at intervals along the longitudinal direction and extend along the transverse direction, and one side surfaces of the first ribbed plates form a first surface. The second ribs are arranged on the other side surfaces of the first ribs at intervals along the transverse direction and extend along the longitudinal direction, and the side surfaces of the second ribs far away from the first ribs form second surfaces. That is, the plurality of second ribs are provided on one side surface of the plurality of first ribs. The surfaces of the plurality of first ribs and the surfaces of the plurality of second ribs opposite to each other form a first surface and a second surface respectively; that is, the surfaces of the first ribs and the second ribs opposite to each other form a first surface; the surfaces of the second ribs and the first ribs opposite to each other form a second surface. The gaps between the adjacent first ribs, between the adjacent second ribs, and between the adjacent first ribs and second ribs form the plurality of airflow channels. Wherein the gap between two adjacent first ribs forms a first airflow channel extending over the first surface, the gap between two adjacent second ribs forms a second airflow channel extending over the second surface, and the gap between adjacent first and second ribs forms a third airflow channel through the support frame 32 communicating the first and second surfaces. That is, the plurality of airflow passages are formed by the intersection structure formed by all the first ribs and all the second ribs.

The supporting frame 32 is provided with a plurality of first ribs which are spaced longitudinally and extend transversely inside the frame, and a plurality of second ribs which are spaced transversely and extend longitudinally on one side surface of the first ribs, so that the continuity of the airflow channel is ensured, the volume of the supporting frame is greatly reduced, and the strength of the supporting frame 32 is greatly enhanced. In addition, the above-mentioned structure of the supporting frame 32 ensures that the oxygen-enriched membrane 36 can obtain sufficient support, and can always maintain good flatness even under the condition of large negative pressure inside the oxygen-enriched gas collecting cavity, thereby ensuring the service life of the oxygen-enriched membrane assembly 30.

The pumping holes 33 may be provided at one lateral side of the frame at a longitudinal middle portion of the frame. This arrangement is equivalent to drawing air from the middle of the oxygen enrichment membrane assembly 30, which facilitates uniform ventilation of the oxygen enrichment membrane 36. The suction hole 33 may be a stepped hole or stepped hole to ensure airtightness at the connection portion when it is connected to the suction pump 40 through a hose.

In addition, the above-mentioned structure of the supporting frame 32 ensures that the oxygen-enriched membrane 36 can obtain sufficient support, and can always maintain good flatness even under the condition of large negative pressure inside the oxygen-enriched gas collecting cavity, thereby ensuring the service life of the oxygen-enriched membrane assembly 30.

The air inlet end of the air pump 40 is connected to the air pumping holes 33 via the air pumping pipeline 51, so as to be communicated to the oxygen-enriched air collecting cavities of the oxygen-enriched membrane modules 30 in the first sealing module 71, and configured to pump the air in the oxygen-enriched air collecting cavities outwards, so that the oxygen content in the fresh-keeping subspace 271 is continuously reduced, and thus a nitrogen-enriched and oxygen-depleted air atmosphere is formed in the fresh-keeping subspace 271, which is favorable for keeping food fresh. The air pump 40 can be arranged in the compressor cabin 24, so that the space of the compressor cabin 24 can be fully utilized, and the space does not occupy other places additionally, therefore, the additional volume of the refrigeration and freezing device is not increased, and the structure of the refrigeration and freezing device can be compact.

In some embodiments of the present invention, the suction pump 40 and the compressor may be disposed on either side of the compressor compartment 24, respectively, and spaced apart from each other such that the suction pump 40 is relatively far from the compressor, reducing noise and waste heat buildup. For example, the suction pump 40 may be disposed at an end of the compressor compartment 24 adjacent the pivotal side of the door. When the refrigeration freezer is a side by side refrigerator, the suction pump 40 may be located anywhere in the compressor compartment 24. In other embodiments of the present invention, the suction pump 40 may also be disposed adjacent to the compressor, such as with the suction pump 40 disposed at one end of the compressor compartment 24 between the compressor and the side wall of the compressor compartment 24.

In some embodiments of the present invention, the suction pump 40 may be mounted within a capsule that may be mounted within the compressor compartment 24 via a mounting plate. The sealing box can largely block the outward propagation of noise and/or waste heat of the suction pump 40.

Oxygen gas pumped by pump 40 is used to supply keep alive sub-space 272 of second containment assembly 72. The keep-alive sub-space 272 is communicated to the outlet end of the air pump 40 via the exhaust pipeline 52 to receive the gas from the oxygen-enriched gas collecting cavity, so as to form a gas atmosphere with oxygen concentration higher than 70% in the keep-alive sub-space 272, which is beneficial for fresh keeping.

The air extraction duct 51 and the air exhaust duct 52 may be embedded in a foam layer of the refrigerating and freezing apparatus, respectively, and in the case where the refrigerating and freezing apparatus is an air-cooled refrigerator, the air extraction duct 51 and the air exhaust duct 52 may be provided in an air duct.

Fig. 7 is a schematic configuration block diagram of a refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 8 is a piping connection schematic diagram of the refrigerating and freezing apparatus according to an embodiment of the present invention. After the air pump 40 is operated, oxygen in the fresh-keeping subspace 271 is discharged into the keep-alive subspace 272 through the oxygen-enriched membrane assembly 30 and the air pump 40, and a nitrogen-rich and oxygen-poor fresh-keeping gas atmosphere is formed in the fresh-keeping subspace 271 and a keep-alive gas atmosphere is formed in the keep-alive subspace 272 at the same time. It should be noted that the start and stop of the air pump 40 are generally synchronized with the start and stop of the air blower 60, that is, the air blower 60 simultaneously makes the air in the fresh keeping subspace 271 form the air flow in the accommodating cavity 31 under the condition that the air pump 40 is started to form the negative pressure in the oxygen-enriched air collecting cavity.

Considering that general users need more fruits and vegetables than keep-alive aquatic products and the oxygen concentration required in the keep-alive subspace is as high as 70%, a plurality of first sealing components 71 can be adopted to supply oxygen to one second sealing component 72; a plurality of first enclosures 71 may also be used to supply a plurality of second enclosures 72 with oxygen, the number of second enclosures 72 may be less than the number of first enclosures 71, and the total volume of the fresh keeping sub-space may be greater than the total volume of the keep-alive sub-space.

In addition, in order to control the process of forming the gas atmosphere and to ensure the tightness of the first closing member 71 and the second closing member 72, the refrigerating and freezing device is further provided with a first valve assembly 151 and a second valve assembly 152. Wherein the first valve assembly 151 is disposed in the suction pipeline 51 and configured to adjust the on-off state of the suction pump 40 and the plurality of first closing assemblies 71; the second valve assembly 152 is disposed in the exhaust line 52 and configured to regulate the on/off state of the air pump and the second sealing assembly.

When the suction pump 40 is turned off, both the first valve assembly 151 and the second valve assembly 152 are turned off to ensure the sealability of the first closing assembly 71 and the second closing assembly 72. After the pump 40 is activated, the first valve assembly 151 communicates the pump 40 with the first confinement assembly 71 that requires oxygen to be pumped and the second valve assembly 152 communicates the pump 40 with the second confinement assembly 72 that requires oxygen to be supplied.

For example, the first valve assembly 151 includes a plurality of gas inlets and a gas outlet, each gas inlet of the first valve assembly 151 is respectively communicated to the oxygen-enriched gas collection chamber of one first sealing assembly 71, the gas outlet of the first valve assembly 151 is communicated to the gas inlet end of the suction pump 40, and the plurality of gas inlets and the one gas outlet of the first valve assembly 151 are respectively controlled to be switched on and off, so as to change the on-off state of the suction pump 40 and the plurality of first sealing assemblies 71.

In the case that the number of the second sealing assemblies 72 is plural, the second valve assembly 152 may include a plurality of air outlets and one air inlet, the air inlet of the second valve assembly 152 is communicated to the air outlet of the air pump 40, each air outlet of the second valve assembly 152 is communicated to one second sealing assembly 72, and the plurality of air outlets and one air inlet of the second valve assembly 152 are controlled to be opened and closed respectively, so as to change the on-off state of the air pump 40 and the plurality of second sealing assemblies 72.

The first valve assembly 151 and the second valve assembly 152 may be formed by splicing a plurality of independent solenoid valves, and the controller controls the plurality of solenoid valves to realize the on-off control.

The refrigeration and freezing apparatus of the present embodiment may be further provided with: a first gas detection device 281 and a second gas detection device 282. Wherein a first gas detection device 281 is disposed in each of the first enclosures 71 and configured to detect a gas atmosphere indicator in the fresh keeping sub-space 271. Second gas detection device 282 is disposed within keep-alive subspace 272 and is configured to detect a gas atmosphere indicator within keep-alive subspace 272; and the air pump 40 is further configured to be turned on or off according to the detection results of the first gas detection device 281 and the second gas detection device 282, and accordingly the first valve assembly 151 can also adjust the on-off state of the air pump 40 and the plurality of first sealing assemblies 71 according to the gas atmosphere index in the fresh keeping subspace 271; and the second valve assembly 152 can also adjust the on-off state of the air pump 40 and the plurality of second airtight assemblies 72 according to the gas atmosphere index in the keep-alive sub-space 272.

The gas atmosphere indicator mainly includes oxygen concentration, and the first gas detection device 281 and the second gas detection device 282 may respectively include: an oxygen concentration sensor. The oxygen concentration sensor may be a diaphragm galvanic cell type, an electrochemical type, a catalytic combustion type, a constant potential electrolysis type, or other types of oxygen concentration sensors, and in some alternative embodiments, the first gas detection device 281 and the second gas detection device 282 may also use a gas analyzer for measuring gas contents therein, including oxygen content, nitrogen content, carbon dioxide content, or the like. A first gas detection device 281 may be disposed in each first capsule 71 and a second gas detection device 282 may be disposed in each second capsule 72.

The suction pump 40 may set different rotation speeds according to the number of the opened first closing member 71 and the opened second closing member 7, and the rotation speed is higher as the number of the first closing member 71 and the opened second closing member 7 is larger.

One control process for the suction pump 40 may be: the oxygen concentration detected by the first gas detection device 281 and the second gas detection device 282 is collected, and when the oxygen concentration of the fresh keeping subspace 271 exceeds a preset fresh keeping range or the oxygen concentration of the keep alive subspace 272 is lower than a preset keep alive range, the air pump 40 is started to discharge the oxygen of the fresh keeping subspace 271 to the keep alive subspace 272. And when the oxygen concentration in the keep-alive subspace 271 is maintained within the keep-alive range or the oxygen concentration in the keep-alive subspace 272 exceeds the preset keep-alive range, the air pump 40 is turned off.

The number of the first sealing unit 71 and the second sealing unit 7 in fig. 7 and 8 is merely an example, and in actual implementation, the number of the first sealing unit 71 and the second sealing unit 72 may be configured as needed. Several options for air conditioning are described below, taking a refrigeration and freezing apparatus with n first enclosures 71 and m second enclosures 72 as an example:

the first method is as follows: the first valve assembly 151 simultaneously communicates the n first sealing assemblies 71 with the air inlet end of the air pump 40, the second valve assembly 152 simultaneously communicates the m second sealing assemblies 72 with the air outlet end of the air pump 40, the air pump 40 simultaneously produces the nitrogen-rich and oxygen-poor gas atmosphere in the n first sealing assemblies 71 so as to be beneficial to keeping food fresh, and produces the gas atmosphere with the oxygen concentration higher than 70% in the m second sealing assemblies 72 so as to be beneficial to keeping fresh and alive. In this process, it is ensured that the air pump 40 uniformly pumps the oxygen gas in the n first sealing modules 71 and uniformly supplies the oxygen gas to the m second sealing modules 72.

When the oxygen concentration of all the n first sealing assemblies 71 is reduced to the preset fresh-keeping condition and the oxygen concentration of the m second sealing assemblies 72 is increased to 70% or more, the first valve assembly 151, the second valve assembly 152 and the air pump 40 are simultaneously closed.

The second method comprises the following steps: after the air pump 40 is started, the first valve assemblies 151 sequentially communicate the first sealing assemblies 71 with the air inlet end of the air pump 40, after the oxygen concentration of the fresh-keeping subspace 271 of the first sealing assembly 71 of the air pump 40 is reduced to the preset fresh-keeping condition, the first valve assemblies 151 communicate the second first sealing assembly 71 with the air inlet end of the air pump 40, and the process is sequentially carried out, only one first sealing assembly 71 is communicated with the air inlet end of the air pump 40 at the same time, until the oxygen concentration of the fresh-keeping subspaces 271 of all n first sealing assemblies 71 is reduced to the preset fresh-keeping condition.

The third method comprises the following steps: after the air pump 40 is started, the second valve assembly 152 sequentially communicates the second sealing assemblies 72 with the exhaust end of the air pump 40, after the oxygen concentration of the keep-alive sub-space 272 of the first second sealing assembly 72 of the air pump 40 is increased to above 70%, the second valve assembly 152 communicates the second sealing assembly 72 with the exhaust end of the air pump 40, and sequentially, only one second sealing assembly 72 is communicated with the exhaust end of the air pump 40 at the same time until the oxygen concentration of the keep-alive sub-spaces 272 of all m second sealing assemblies 72 is increased to above 70%.

The method is as follows: the oxygen concentration detected by the first gas detection device 281 is collected in real time, and after the oxygen concentration of any one of the n first sealing modules 71 is increased, the first valve assembly 151 communicates the first sealing module 71 with the increased oxygen concentration with the air pump 40, so that the air pump 40 pumps the oxygen in the fresh keeping subspace 271 of the first sealing module 71.

The fifth mode is as follows: the oxygen concentration detected by the second gas detection device 282 is collected in real time, and after the oxygen concentration in any one of the m second airtight modules 71 is reduced, the second valve module 152 communicates the second airtight module 72 in which the oxygen concentration is reduced with the air pump 40, so that the air pump 40 supplies oxygen to the second airtight module 72.

The controlled atmosphere control methods in the modes can be flexibly selected and used and can be flexibly combined and used according to the preservation requirement.

In addition, the specific oxygen concentration range in the atmosphere rich in nitrogen and poor in oxygen to keep food fresh can be determined according to the type of food placed in the fresh-keeping subspace 271. Through the research on the food preservation characteristics, the inventor finds that oxygen is closely related to the oxidation and respiration of fruits and vegetables, the lower the oxygen concentration is, the more beneficial the fruits and vegetables are to be preserved, and the too low oxygen content can cause the food to have anaerobic respiration, and the food can also be deteriorated. Therefore, each kind of fruits and vegetables may have the optimal oxygen concentration range, and after the user places the fruits and vegetables in the fresh-keeping subspace 271, the fruit and vegetable type can be set or automatically identified by the freezing and refrigerating device, so as to correspondingly determine the oxygen concentration range required to be maintained in the fresh-keeping subspace 271.

The oxygen concentration requirements of the plurality of first closing members 71 may be set to be the same or different, and are determined according to the type of food stored therein.

The refrigerating and freezing device of the embodiment creatively proposes that the oxygen-enriched membrane component is adopted to discharge oxygen in the air in the sealed fresh-keeping subspace 271 to the fresh-keeping subspace 272, so as to obtain a gas atmosphere which is rich in nitrogen and poor in oxygen and is beneficial to food fresh keeping in the fresh-keeping subspace 271. In the nitrogen-rich and oxygen-poor gas atmosphere, the oxygen content in the fruit and vegetable storage space is reduced, the aerobic respiration intensity of the fruit and vegetable is reduced, the basic respiration is ensured, and the fruit and vegetable is prevented from anaerobic respiration, so that the aim of keeping the fruit and vegetable fresh for a long time is fulfilled. Meanwhile, oxygen separated out by the oxygen-enriched membrane component 30 is supplied to the closed keep-alive subspace 272, so that the oxygen concentration of the keep-alive subspace 272 reaches more than 70% of that of aquatic products which can keep alive for a long time. Therefore, the oxygen-enriched membrane component 30 can provide gas atmosphere for the fresh keeping subspace 271 for keeping fruits and vegetables fresh and the keep-alive subspace 272 for keeping fresh aquatic products alive at the same time, thereby enriching the food fresh-keeping requirements of users.

Furthermore, the refrigerating and freezing apparatus of the present invention can maintain the gas atmosphere in the fresh-keeping subspace 271 and the keep-alive subspace 272 by adjusting the operation states of the air pump 40, the air exhaust pipeline 51 and the air exhaust pipeline 52.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A refrigeration chiller comprising:

a box body, wherein a storage space is limited in the box body;

the door body is pivotally arranged on the box body and is configured to open or close the storage space defined by the box body;

the first sealing assemblies are arranged in the storage space, and freshness keeping sub-spaces are respectively limited in the first sealing assemblies;

each first closed component is provided with an oxygen-enriched membrane component, an oxygen-enriched membrane is arranged in each oxygen-enriched membrane component, the surrounding space of each oxygen-enriched membrane component is communicated with the fresh-keeping subspace, and an oxygen-enriched gas collecting cavity is formed in each oxygen-enriched membrane component;

the air suction pump is communicated with the oxygen-enriched air collecting cavities of the first sealing assemblies through air suction pipelines at the air inlet end and is configured to suck air in the oxygen-enriched air collecting cavities outwards so that at least part of oxygen in the fresh-keeping sub-spaces of the first sealing assemblies enters the oxygen-enriched air collecting cavities through the oxygen-enriched films, and therefore the oxygen concentration in the fresh-keeping sub-spaces of the first sealing assemblies is reduced;

one or more second closed components which are also arranged in the storage space and internally define a keep-alive subspace, wherein the keep-alive subspace is respectively communicated to the air outlet end of the air pump through an air exhaust pipeline so as to receive the gas from the oxygen-enriched gas collecting cavity, and therefore a gas atmosphere which is beneficial to fresh keeping and keep alive and has the oxygen concentration higher than 70% is formed in the keep-alive subspace; wherein

Each of the first closing members includes:

the first drawer cylinder is provided with a forward opening and is arranged in the storage space;

a first drawer body slidably mounted within the first drawer barrel to be operatively withdrawn outwardly from and inserted inwardly into the forward opening of the first drawer barrel, and an end plate of the first drawer body forming a sealing structure with the forward opening of the first drawer barrel, the first drawer body forming the crisper subspace therein;

an accommodating cavity communicated with the fresh-keeping subspace is formed in the top wall of the first drawer cylinder body and used for arranging the oxygen-enriched membrane component; at least one first vent hole and at least one second vent hole which is arranged at intervals with the at least one first vent hole are formed in the wall surface between the accommodating cavity and the fresh keeping subspace of the top wall of the first drawer cylinder body, so that the accommodating cavity and the fresh keeping subspace are communicated at different positions respectively;

the refrigeration and freezing device further comprises a fan which is arranged in the accommodating cavity to promote the formation of airflow which sequentially passes through the at least one first vent hole, the accommodating cavity and the at least one second vent hole and returns to the fresh-keeping subspace.

2. The refrigeration freezer of claim 1, further comprising:

the first valve assembly is arranged in the air suction pipeline and is configured to adjust the on-off state of the air suction pump and the plurality of first sealing assemblies;

and the second valve assembly is arranged in the exhaust pipeline and is configured to regulate the on-off state of the air suction pump and the second sealing assembly.

3. A refrigerator-freezer as claimed in claim 2, wherein the freezer is arranged to cool the container

The first valve assembly comprises a plurality of air inlets and an air outlet, each air inlet of the first valve assembly is respectively communicated to the oxygen-enriched gas collecting cavity of one first closed assembly, the air outlet of the first valve assembly is communicated to the air inlet end of the air pump, and the air inlets and the air outlet of the first valve assembly are respectively controlled to be switched on and switched off, so that the on-off states of the air pump and the first closed assemblies are changed.

4. A refrigerator-freezer as claimed in claim 2, wherein the freezer is arranged to cool the container

The second sealing component is a plurality of

The second valve assembly comprises a plurality of air outlets and an air inlet, the air inlet of the second valve assembly is communicated to the air outlet end of the air pump, each air outlet of the second valve assembly is communicated to one second airtight assembly, and the air outlets and the air inlet of the second valve assembly are controlled to be switched on and switched off respectively, so that the on-off state of the air pump and the second airtight assemblies is changed.

5. The refrigeration freezer of claim 2, further comprising:

a first gas detection device disposed within the freshness sub-space and configured to detect a gas atmosphere indicator within the freshness sub-space;

the second gas detection device is arranged in the keep-alive subspace and is configured to detect a gas atmosphere index in the keep-alive subspace; and is

The suction pump is further configured to be turned on or off according to the detection results of the first gas detection device and the second gas detection device.

6. A refrigerator-freezer according to claim 5, wherein the freezer is a refrigerator-freezer

The first valve assembly is further configured to adjust the on-off state of the air suction pump and the plurality of first sealing assemblies according to the gas atmosphere index in the fresh keeping subspace; and is

The second valve assembly is further configured to adjust the on-off state of the air pump and the plurality of second airtight assemblies according to the gas atmosphere index in the keep-alive subspace.

7. A refrigerator-freezer as claimed in claim 1, wherein the freezer is arranged to cool the container

The air suction pump is arranged in a compressor cabin of the refrigerating and freezing device, and the air suction pipeline and the air exhaust pipeline are respectively embedded in a foaming layer of the refrigerating and freezing device.

8. A refrigerator-freezer according to claim 1, wherein the second enclosure assembly comprises:

the second drawer cylinder is provided with a forward opening and is arranged in the storage space;

a second drawer body slidably mounted within the second drawer barrel to be operatively withdrawn outwardly and inserted inwardly from a forward opening of the second drawer barrel, and an end plate of the second drawer body forming a sealing structure with the forward opening of the second drawer barrel, the keep alive subspace being formed within the second drawer body.