CN106582216B

CN106582216B - Air separation device and refrigerating and freezing device

Info

Publication number: CN106582216B
Application number: CN201611110803.8A
Authority: CN
Inventors: 王磊; 王晶; 毕云龙; 王英星
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Co Ltd
Priority date: 2016-12-02
Filing date: 2016-12-02
Publication date: 2019-12-10
Anticipated expiration: 2036-12-02
Also published as: CN106582216A

Abstract

The invention provides an air separation device and a refrigerating and freezing device. The air separation plant comprises: a base frame defining an enriched gas collection cavity therein and having at least one base support surface in communication with the enriched gas collection cavity; at least one stacking frame, each stacking frame having a stacking support surface with a channel formed therein, and each stacking frame removably stacking outside of the base support surface of the base frame; and a plurality of air separation membranes respectively disposed on the base support surface and the overlying support surface, each air separation membrane configured such that a particular gas in the air stream in the space surrounding the air separation plant permeates the air separation membrane more than other gases therein to enter the enriched gas collection chamber. According to the invention, the base frame and the superposed frame are spliced and combined, so that the number of layers of the air separation membrane penetrated by the outside air before entering the enriched gas collecting cavity is increased, and the purity of air separation is further enhanced.

Description

Air separation device and refrigerating and freezing device

Technical Field

the invention relates to the technical field of gas separation, in particular to an air separation device and a refrigerating and freezing device with the same.

Background

the refrigerator is a refrigerating device for keeping constant low temperature, and is a civil product for keeping food or other articles in a constant low-temperature cold state. 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.

in the preservation technology of the refrigerator, oxygen is closely related to the oxidation and respiration of food in the refrigerator. The slower the respiration of the food, the lower the oxidation of the food and the longer the preservation time. The oxygen content in the air is reduced, and the fresh-keeping effect on food is obvious.

At present, in order to reduce the oxygen content in the refrigerator, in the prior art, vacuum preservation is generally utilized or a deoxidation device is additionally arranged for low-oxygen preservation. However, the operation of vacuum preservation is usually complicated and inconvenient to use; the deoxidation device usually uses electrolyte to remove oxygen, and the device is complex and the oxygen removal effect is not obvious.

Modified atmosphere technology generally refers to technology for prolonging the storage life of food by adjusting the gas atmosphere (gas component ratio or gas pressure) of a closed space where stored objects are located, and the basic principle is as follows: in a certain closed space, a gas atmosphere different from normal air components is obtained through various regulation modes so as to inhibit physiological and biochemical processes and activities of microorganisms which cause the putrefaction and deterioration of stored objects (generally food materials). In particular, in the present application, the modified atmosphere preservation discussed will be specific to modified atmosphere preservation techniques that regulate the proportions of the gas components.

As is known to those skilled in the art, the normal air composition includes (in volume percent, the same applies hereinafter): about 78% nitrogen, about 21% oxygen, about 0.939% noble gases (helium, neon, argon, krypton, xenon, radon), 0.031% carbon dioxide, and 0.03% other gases and impurities (e.g., ozone, nitric oxide, nitrogen dioxide, water vapor, etc.). In the field of modified atmosphere preservation, nitrogen-rich and oxygen-poor preservation gas atmosphere is obtained by filling nitrogen-rich gas into a closed space to reduce oxygen content. Here, nitrogen-rich gas is understood by those skilled in the art to mean a gas having a nitrogen content exceeding that of the normal air, for example, the nitrogen content therein may be 95% to 99%, or even higher; the nitrogen-rich and oxygen-poor fresh-keeping gas atmosphere refers to a gas atmosphere in which the nitrogen content exceeds the nitrogen content in the normal air and the oxygen content is lower than the oxygen content in the normal air.

the history of modified atmosphere technology dates back to 1821 German biologists 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. It can be said that the adoption of proper gas conditioning technology and corresponding devices can economically miniaturize and mute the gas conditioning system, so that the system is suitable for families or individual users, and is a technical problem which is desired to be solved by technicians in the field of gas conditioning preservation and is not successfully solved all the time.

disclosure of Invention

it is an object of the first aspect of the present invention to address the above-mentioned shortcomings of the prior art by providing an air separation unit to achieve separation of a particular gas from air.

it is a further object of the first aspect of the present invention to provide an air separation unit suitable for use within a refrigeration chiller apparatus to reduce the oxygen content of the storage space of the refrigeration chiller apparatus.

It is a further object of the first aspect of the present invention to provide an air separation unit that is small, strong, and has a significant oxygen scavenging effect.

The invention aims at overcoming at least one defect of the existing refrigerator, provides a refrigeration and freezing device, creatively provides a gas atmosphere which utilizes an air separation device to discharge oxygen in air in a space out of the space, so as to obtain nitrogen-rich and oxygen-poor gas in the space to be beneficial to food preservation, and the gas atmosphere reduces the intensity of aerobic respiration of fruits and vegetables by reducing the content of the oxygen in the fruit and vegetable preservation space, simultaneously ensures the basic respiration, prevents the anaerobic respiration of the fruits and vegetables, and achieves the purpose of long-term preservation of the fruits and vegetables.

According to a first aspect of the present invention there is provided an air separation unit comprising:

a base frame defining an enriched gas collection cavity therein and having at least one base support surface in communication with the enriched gas collection cavity;

At least one stacking frame, each stacking frame having a stacking support surface formed with a channel, and each stacking frame removably stacking outside of a base support surface of the base frame, wherein the stacking support surface of each stacking frame is distal from the base frame; and

A plurality of air separation membranes respectively disposed on said base support surface and said overlying support surface, each of said air separation membranes being configured such that a particular gas in the flow of air in the space surrounding said air separation plant permeates said air separation membrane more than other gases therein to enter said enriched gas collection chamber.

Optionally, the base frame comprises a pumping hole in communication with the enriched gas collection chamber to allow a specific gas in the enriched gas collection chamber to be output.

Optionally, the base frame further comprises:

a base frame with a hollow interior;

The first rib plate group is arranged inside the basic frame and comprises a plurality of rib plates arranged at intervals; and

A second rib group arranged in the base frame and also comprising a plurality of ribs arranged at intervals, wherein

The second rib group is arranged on the inner side surface of the first rib group, a plurality of ribs of the second rib group are arranged in a crossing mode with a plurality of ribs of the first rib group, gaps between adjacent ribs jointly form the enriched gas collecting cavity, and the outer side surface of the first rib group and the outer side surface of the second rib group respectively form one foundation supporting surface.

Optionally, the first set of ribs comprises: the first rib plates are arranged at intervals, and a plurality of first narrow rib plates are arranged between every two adjacent first rib plates at intervals;

the second rib group includes: a plurality of second wide rib plates are arranged at intervals, and a plurality of second narrow rib plates are arranged between every two adjacent second wide rib plates at intervals; wherein

Each first wide rib plate is inwards sunken from the outer side surface of the first wide rib plate to form a first groove;

Each of the second broad ribs is recessed inward from an outer side surface thereof to form a second groove.

Optionally, a portion of the surface of the inner side of each of the first broad ribs extends toward the second rib group to be flush with the outer side surface of the second rib group, and a third groove is formed recessed inwardly from the portion of the surface flush with the outer side surface of the second rib group; wherein the third groove is communicated with the intersection of the second groove to form a cross groove; and/or

A part of a surface of an inner side of at least one of the second wide ribs of the plurality of second wide ribs extends toward the first rib group to be flush with an outer side surface of the first rib group, and is recessed inward from the part of the surface flush with the outer side surface of the first rib group to form a fourth groove; wherein the fourth groove is communicated with the position where the first groove is intersected to form a cross groove.

Optionally, the base frame further comprises:

a base frame defining a receiving cavity therein having an opening; and

A plurality of ribs spaced at said opening of said enriched gas collection chamber, wherein

The outer side surfaces of the plurality of ribs form the base support surface;

The plurality of ribs and the containment chamber cooperatively define the enriched gas collection chamber.

Optionally, each of the stacking frames comprises:

A hollow superimposed frame inside; and

The overlapped rib plate group is arranged in the overlapped frame; the stacking rib plate group comprises a plurality of rib plates arranged at intervals, the outer side surface of the stacking rib plate group forms the stacking support surface, and the interval between every two adjacent rib plates forms the channel.

optionally, the number of the stacking frames is two, and the two stacking frames are respectively and detachably stacked on the outer sides of the two basic supporting surfaces of the basic frame, and

The inner side surface of the stacked rib groups of each stacked frame is spaced apart from the facing air separation membrane laid on the base support surface.

Optionally, the air separation membrane is an oxygen-enriched membrane and the specific gas is oxygen.

According to a second aspect of the present invention, there is provided a refrigeration and freezing apparatus comprising:

The refrigerator comprises a refrigerator body, a storage space is limited in the refrigerator body, and a controlled atmosphere fresh-keeping space is arranged in the storage space;

the air separation plant of any one of the preceding claims; and

And the inlet end of the air pump is communicated with the enriched gas collecting cavity of the air separation device through a pipeline so as to pump and discharge the gas penetrating into the enriched gas collecting cavity to the outside of the modified atmosphere space.

the air separation device adopts a modularized design, and increases the number of layers of air separation membranes penetrated by outside air before entering the enriched gas collection cavity by splicing and combining the basic frame and the superposed frame, thereby enhancing the purity of air separation. Meanwhile, the links of manufacturing, mounting and the like of the air separation device can be simplified, and the air separation device is favorable for disassembly, maintenance, recovery and the like. In addition, when the requirement of the user changes, only the superposition frame needs to be increased or decreased or the basic frame needs to be replaced.

Furthermore, the base frame is provided with the plurality of ribbed plates at intervals at the opening of the accommodating cavity, and the air separation membrane is arranged on the outer side surfaces of the ribbed plates, so that the continuity of the airflow channel is ensured, the volume of the base frame is reduced, and the strength of the base frame is enhanced. In addition, the structure of the basic frame ensures that the air separation membrane can obtain enough support, and can always keep better flatness even under the condition of larger negative pressure inside the enriched gas collection cavity, thereby ensuring the service life of the air separation device.

further, in the base frame of the present invention, the first rib group is provided inside the frame, the second rib group is formed on the inner side surface of the first rib group, and the air separation membrane is provided on the outer side surfaces of the first rib group and the second rib group, so that the volume of the base frame is greatly reduced and the air separation area is large. And the structural design of the first rib plate group and the second rib plate group ensures the continuity of the airflow channel on one hand, and greatly enhances the strength of the base frame on the other hand. In addition, the structure of the basic frame ensures that the air separation membranes on two sides can obtain enough support, and the air separation device can always keep better flatness even under the condition that the negative pressure in the enriched gas collection cavity is larger, so that the service life of the air separation device is ensured. The invention further provides a plurality of first wide rib plates and a plurality of second wide rib plates, thereby further enhancing the strength of the base frame and further ensuring that the air separation membrane obtains sufficient support. In addition, the groove structures are further arranged on the surfaces of the first wide rib plate and the second wide rib plate, so that gas blocking is prevented and the gas conduction rate is increased under the condition that the negative pressure inside the enriched gas collecting cavity is large, and the separation effect of the air separation device is improved.

Furthermore, the air separation membrane is conveniently, quickly and reliably arranged on the frame by forming the mounting grooves and the loop line grooves on the frames of the basic frame and the superposed frame, and the air tightness of the air separation device is ensured.

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 block diagram of an air separation plant according to one embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the air separation plant of FIG. 1;

FIG. 3 is a schematic exploded view of the air separation plant of FIG. 1;

FIG. 4 is a schematic exploded view of the middle structure shown in FIG. 3;

FIG. 5 is a schematic block diagram of the base frame shown in FIG. 4;

FIG. 6 is an enlarged schematic view of region A in FIG. 5;

Fig. 7 is a schematic structural view of the base frame shown in fig. 5 viewed from another angle;

fig. 8 is an enlarged schematic view of a region B in fig. 7;

FIG. 9 is a schematic block diagram of an air separation plant according to another embodiment of the present invention;

FIG. 10 is a schematic exploded view of the air separation unit of FIG. 9;

FIG. 11 is a schematic exploded view of the lower structure shown in FIG. 10;

FIG. 12 is an enlarged schematic view of region C of FIG. 11;

FIG. 13 is a schematic cross-sectional view of the lower structure shown in FIG. 10;

fig. 14 is a schematic layout structure view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

Fig. 15 is a schematic configuration view of the refrigerating and freezing apparatus shown in fig. 14 viewed from another angle;

Figure 16 is a schematic partial block diagram of a refrigeration freezer in accordance with one embodiment of the invention;

Fig. 17 is a schematic exploded view of the structure shown in fig. 16.

Detailed Description

FIG. 1 is a schematic block diagram of an air separation plant 100 according to one embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of the air separation plant 100 shown in FIG. 1; fig. 3 is a schematic exploded view of the air separation plant 100 shown in fig. 1. Referring to fig. 1-3, an air separation plant 100 according to an embodiment of the present invention may generally include: a base frame 110, at least one stacking frame 1100, and a plurality of air separation membranes 120.

The base frame 110 defines an enriched gas collection cavity therein and has at least one base support surface in communication with the enriched gas collection cavity. It will be readily understood by those skilled in the art that the inner side of the base support surface faces the enriched gas collection chamber and the outer side of the base support surface faces away from the enriched gas collection chamber.

Each stacking frame 1100 has a stacking support surface 1107, the stacking support surface 1107 is formed with a channel 1106, and each stacking frame 1100 is removably stacked outside of the base support surface of the base frame 110, wherein the stacking support surface 1107 of each stacking frame 1100 is distal from the base frame 110.

a plurality of air separation membranes 120 are laid over the base support surface and the overlying support surface 1107, respectively, each air separation membrane 120 being configured such that a particular gas in the airstream of the space surrounding the air separation plant 100 permeates the air separation membrane 120 more than other gases therein to enter the enriched gas collection chamber.

That is, in an embodiment of the present invention, one air separation membrane 120 is laid over each overlying support surface 1107 and each underlying support surface. The stacking frame 1100 is removably stacked on the outside of the air separation membrane 120 laid on the base supporting surface of the base frame 110. And the air separation membrane 120 laid on the stacking support surface 1107 of the stacking frame 1100 does not directly face the air separation membrane 120 laid on the base support surface of the base frame 110 (i.e., with the stacking frame 1100 interposed therebetween). The air separation device 100 of the present invention adopts a modular design, and increases the number of layers of the air separation membrane 120 that the outside air permeates before entering the enriched gas collection chamber by splicing and combining the base frame 110 and the stacking frame 1100, thereby enhancing the purity of the air separation. Meanwhile, the links of manufacturing, installing and the like of the air separation device 100 can be simplified, and the disassembly, the maintenance, the recovery and the like are facilitated. In addition, when the user's needs change, it is only necessary to increase or decrease the overlay frame 1100 or replace the base frame 110.

In some embodiments of the present invention, the air separation membrane 120 may be permeable to all gases, except that different gases have different degrees of permeability. The permeation of gas through the air separation membrane 120 is a complicated process, and the permeation mechanism is generally that gas molecules are first adsorbed to the surface of the air separation membrane 120 to be dissolved, then diffused in the air separation membrane 120, and finally desorbed from the other side of the air separation membrane 120. Membrane separation techniques rely on the difference in the solubility and diffusion coefficients of different gases in the air separation membrane 120 to achieve separation of the gases. When the mixed gas is under a certain driving force (pressure difference or pressure ratio between two sides of the air separation membrane), the gas with a relatively fast permeation rate (i.e. the aforementioned specific gas) permeates the air separation membrane 120, and is enriched on the permeation side of the air separation membrane 120, while the gas with a relatively slow permeation rate is retained on the retentate side of the air separation membrane 120 and is enriched, so as to achieve the purpose of separating the mixed gas.

in a preferred embodiment, the air separation membrane 120 may be an oxygen-rich membrane, and accordingly, the specific gas is oxygen. In alternative embodiments, the air separation membrane 120 may also be a separation membrane commonly used in the art for separating other gases.

in some embodiments, the base frame 110 of the air separation plant 100 may include: and a pumping hole 101 which is communicated with the enriched gas collecting cavity to allow the specific gas in the enriched gas collecting cavity to be output. The enriched gas collection chamber may be connected to a pump through a pumping hole 101 to output the specific gas from the enriched gas collection chamber. As the enriched gas in the enriched gas collecting cavity is output, the enriched gas collecting cavity is in a negative pressure state, so that the specific gas in the air outside the air separation device 100 can continuously permeate through the air separation membrane 120 to enter the enriched gas collecting cavity.

In the embodiment illustrated in fig. 1-3, the air separation plant 100 includes a base frame 110 and two stacked frames 1100. The base frame 110 is located at the middle portion, both upper and lower side surfaces of the base frame 110 are formed as base support surfaces, and both the base support surfaces are laid with the air separation membrane 120, and the base frame 110 laid with the air separation membrane 120 may refer to the structure 11 located at the middle portion shown in fig. 3. The two stacking frames 1100 are respectively and detachably stacked on the upper and lower sides of the structure 11, that is, the two stacking frames 1100 are respectively and detachably stacked on the outer sides of the two base supporting surfaces of the base frame 110. In which the stacking support surface 1107 of each stacking frame 1100 is located at the outside and is respectively laid with the air separation membrane 120, the stacking frame 1100 laid with the air separation membrane 120 can be referred to the upper structure 1 and the lower structure 1 shown in fig. 3. As will be readily understood by a person skilled in the art, the upper structure 1 and the lower structure 1 are arranged symmetrically with respect to the middle structure 11. In such an embodiment, the air separation membrane 120 is disposed on opposite surfaces of both sides of the air separation unit 100, so that the specific gas in the air outside the air separation unit 100 can enter the enriched gas collection chamber from the surfaces of both sides.

with continued reference to fig. 2 and 3, each stacking frame 1100 includes: a hollow interior overlying bezel 1030; and an overlapping rib plate set disposed within the overlapping bezel 1030; the stacked rib group includes a plurality of ribs 1104 arranged at intervals, and outer side surfaces of the stacked rib group form a stacked support surface 1107. The gap between two adjacent ribs 1104 forms a channel 1106 of the aforementioned overlying support surface 1107.

in some embodiments, there may be no gap between the inside surface of the stacked rib groups of the stacked frame 1100 and the facing air separation membrane 120 laid on the base support surface, i.e., a particular gas in the air outside of the air separation plant 100 flows directly through the inner air separation membrane 120 (i.e., the air separation membrane 120 laid on the outside of the stacked support surface 1107 of the stacked frame 110) into the enriched gas collection cavity of the base frame 110 after entering the channel 1106 via the outer air separation membrane 120 (i.e., the air separation membrane 120 laid on the outside of the stacked support surface 1107 of the stacked frame 1100) and thus is pumped away by the suction pump.

Further, in order to enhance the flow effect of air inside the air separation device 100, the inner side surface of the stacked rib groups of each stacked frame 1100 is spaced apart from the facing air separation membrane 120 laid on the base support surface. That is, there is a space 1105 between the inner side surface of the stacked rib group and the air separation membrane 120 provided on the base frame 110. The specific gas in the air outside the air separation device 100 enters the space 1105 through the outer air separation membrane 120 and then enters the enriched gas collecting chamber of the base frame 110 through the inner air separation membrane 120, thereby being pumped out by the air pump.

In a further embodiment, one or more stacking frames 1100 may be further stacked outside each stacking frame 1100.

FIG. 4 is a schematic exploded view of the intermediate structure 11 shown in FIG. 3; FIG. 5 is a schematic block diagram of the base frame 110 shown in FIG. 4; FIG. 6 is an enlarged schematic view of region A in FIG. 5; fig. 7 is a schematic structural view of the base frame 110 shown in fig. 5 viewed from another angle; fig. 8 is an enlarged schematic view of a region B in fig. 7. Referring to fig. 4-8, in some embodiments, the base frame 110 of the air separation plant 100 further includes an internally hollow base bezel 102; a first rib group 1110 disposed inside the base frame 102 and a second rib group 1120 disposed inside the base frame 102. The base rim 102 is hollow on the inside, which is understood to have only one ring of annular side walls. The first rib plate group 1110 and the second rib plate group 1120 respectively include a plurality of rib plates arranged at intervals inside the base frame 102.

the second rib group 1120 is disposed on an inner side surface of the first rib group 1110, and a plurality of ribs of the second rib group 1120 and a plurality of ribs of the first rib group 1110 are disposed to intersect. That is, the ribs in the second rib group 1120 are directly formed on the inner side surfaces of the ribs in the first rib group 1110; the extending direction of the ribs in the second rib group 1120 is different from the extending direction of the ribs in the first rib group 1110, and an included angle is formed between the two. The angle between the two is preferably 30 to 150 degrees, more preferably 60 to 120 degrees, and still more preferably about 90 degrees. The gaps between adjacent ribs collectively form the aforementioned enriched gas collection chamber. The outer side surface of the first rib group 1110 and the outer side surface of the second rib group 1120 form a base support surface, respectively. Two air separation membranes 120 are respectively disposed on the outer side surfaces of the first rib group 1110 and the second rib group 1120. As will be appreciated by those skilled in the art, the side surface of the second rib group 1120 facing away from the first rib group 1110 is the outside surface thereof, and the side surface of the second rib group 1120 facing or facing the first rib group 1110 is the inside surface thereof; accordingly, a side surface of the first rib group 1110 away from the second rib group 1120 is an outer side surface thereof, and a side surface of the first rib group 1110 facing or facing the second rib group 1120 is an inner side surface thereof.

according to the basic frame 110, the first rib plate groups 1110 and the second rib plate groups 1120 are arranged in the basic frame 102 at intervals, so that on one hand, the continuity of the air flow channel inside the enriched gas collection cavity is ensured, on the other hand, the volume of the basic frame 110 is greatly reduced, and the strength of the basic frame 110 is greatly enhanced. In addition, the above-mentioned structure of the base frame 110 ensures that the air separation membrane 120 can obtain sufficient support, and can always maintain good flatness even under the condition that the negative pressure inside the enriched gas collection chamber is large, thereby ensuring the service life of the air separation device 100.

in a further embodiment, the first rib group 1110 may include: a plurality of first narrow ribs 1111 and a plurality of first wide ribs 1112. The first broad ribs 1112 are arranged at intervals, and the first narrow ribs 1111 are arranged between two adjacent first broad ribs 1112 at intervals. The second rib plate group 1120 may include: a plurality of second narrow ribs 1121 and a plurality of second wide ribs 1122, the plurality of second wide ribs 1122 are arranged at intervals, and the plurality of second narrow ribs 1121 are arranged at intervals between two adjacent second wide ribs 1122. As will be readily understood by those skilled in the art, the terms "wide" and "narrow" are used herein in a relative sense, i.e., the width of the first wide rib 1112 is greater than the width of the first narrow rib 1111, and specifically, the width of the first wide rib 1112 may be about 2-3 times the width of the first narrow rib 1111; the width of the second wide ribs 1122 is wider than the width of the second narrow ribs 1121, and specifically, the width of the second wide ribs 1122 may be about 2 to 3 times the width of the second narrow ribs 1121. The present invention further enhances the strength of the base frame 110 by providing the plurality of first wide ribs 1112 and the plurality of second wide ribs 1122.

in some embodiments, each first broad rib 1112 is recessed inwardly from its outer surface (i.e., the surface of the first broad rib 1112 facing the air separation membrane 120) to form a first groove 12; each of the second wide ribs 1122 is recessed inward from its outer surface (i.e., the surface of the second wide rib 1122 facing the air separation membrane 120) to form a second groove 22. It will be appreciated by those skilled in the art that in such an embodiment, the openings of the first and second channels 12, 22 are opposite and do not interfere with each other. The groove structures are arranged on the surfaces of the first wide ribs 1112 and the second wide ribs 1122, so that the connectivity of the internal grid structures of the base frame 110 is improved on the premise of ensuring that the thickness (or the volume) of the base frame is small. Therefore, even under the condition that the negative pressure in the enriched gas collecting cavity is large, the gas blocking can be prevented, and the gas conduction rate is increased.

In some embodiments, the first grooves 12 may be formed over the entire length of the first broad ribs 1112; the second grooves 22 are formed over the entire length of the second wide ribs 1122. In an alternative embodiment, the first grooves 12 may also be formed only on one or more sections of the first broad ribs 1112; or forming the second grooves 22 on one or more sections of the second wide ribs 1122.

In a further embodiment, a portion of the surface of the inner side of each first wide rib 1112 extends toward the second rib group 1120 to be flush with the outer side surface of the second rib group 1120, and is recessed inwardly from the portion of the surface flush with the outer side surface of the second rib group 1120 to form a third groove 14; the third grooves 14 communicate with the portions where the second grooves 22 intersect to form cross grooves 23. A part of the surface inside at least one second wide rib 1122 of the plurality of second wide ribs 1122 extends toward the first rib group 1110 to be flush with the outer side surface of the first rib group 1110, and is recessed inward from the part of the surface flush with the outer side surface of the first rib group 1110 to form a fourth groove 25; wherein the fourth grooves 25 communicate with the portions where the first grooves 12 intersect to form the cross grooves 13. According to the invention, the groove structures are arranged on the two side surfaces of the first wide rib plates 1112 and/or the second wide rib plates 1122, the groove on one side of the first wide rib plates 1112 is communicated with the crossed part of the second groove 22, and the groove on one side of the second wide rib plates 1122 is communicated with the crossed part of the first groove 12, so that the connectivity of the grid structure is further improved, the gas dispersion is facilitated, and the gas blocking is prevented.

In a particular embodiment, the number of first wide ribs 1112 may be two, which approximately bisects each second wide rib 1122 in the longitudinal direction. There may be about 10 first narrow ribs 1111 between two adjacent first broad ribs 1112. The second wide ribs 1122 are four or more in number and arranged in the lateral direction at equal intervals. The number of the second wide ribs 1122 is preferably ten as shown in fig. 5. The number of the second wide ribs 1122 forming the fourth grooves 25 is four, and as shown in fig. 7, two of the second wide ribs are located in the middle of the frame base 102, and two of the second wide ribs are located on two lateral sides of the base frame 102. About 4 to 6 second narrow ribs 1121 may be disposed between two adjacent second wide ribs 1122. The center of the pumping hole 101 is preferably in the same plane with the interface of the first rib group 1110 and the second rib group 1120, so as to facilitate the circulation of the gas path inside the enriched gas collection chamber.

in a specific embodiment, the ribs of the first rib group 1110 are spaced apart longitudinally and extend laterally within the bezel 102; the plurality of ribs of the second rib group 1120 are provided at intervals in the lateral direction on the inner side surface of the first rib group 1110 and extend in the longitudinal direction. The suction holes 101 may be provided at one lateral side of the base frame 102 at a longitudinally middle portion of the frame base 102. This arrangement corresponds to drawing air from the middle of the air separation unit 100, which facilitates uniform aeration of the air separation membrane 120. The suction hole 101 may be a stepped hole or stepped hole to ensure airtightness at the connection portion when it is connected to the suction pump through a hose. Referring to fig. 5, a groove 21 aligned with the center of the air extracting hole 101 is formed on the outer side surface of the plurality of second narrow ribs 1121 adjacent to the air extracting hole 101 to enlarge the amount of air taken by the air extracting hole 101, further increasing the air guide ratio, thereby further improving the air separating effect of the air separating apparatus 100.

In some embodiments, the edges of the outboard surfaces of the ribs of the first rib group 1110 form chamfers; the edges of the outer side surfaces of the ribs of the second rib group 1120 are chamfered, so that the contact area between the first rib group 1110 and the second rib group 1120 and the air separation membrane 120 can be reduced, and the gas fluidity inside the enriched gas collecting chamber can be further enhanced.

in some embodiments, both side surfaces of the circumferential inner side of the base frame 102 are recessed flush with the outer side surfaces of the first rib group and the second rib group, respectively, to form one mounting groove 114 on both side surfaces of the base frame 102, respectively, and each air separation membrane 120 is fitted into one mounting groove 114. Both side surfaces of the base frame 102 are recessed in the periphery of the mounting groove 114 to form a ring of circumferential grooves 115, respectively, for filling the sealant 130 to sealingly mount the air separation membrane 120 in the mounting groove 114. According to the invention, the mounting groove 114 and the loop line groove 115 are formed on the base frame 102 of the base frame 110, so that the air separation membrane 120 can be conveniently, quickly and reliably mounted on the base frame 110, the air tightness of the air separation device 100 is ensured, and a sufficient pressure difference can be formed between the inside and the outside of the air separation membrane 120. When the air separation device 100 of the embodiment of the invention is used for the food preservation of the refrigerator, the sealant is guaranteed to be food grade standard, namely, the sealant is guaranteed not to generate peculiar smell and harmful volatile substances.

In some embodiments, referring to fig. 4, to further facilitate installation, a ring of double-sided adhesive 140 may be used to pre-fix the air separation membrane 120 in the installation recess 114, and then a ring of sealant 130 may be filled in the loop wire groove 115 to sealingly install the air separation membrane 120 in the installation recess 114.

In some embodiments, the aforementioned mounting groove may also be formed on the outer side surface of the superimposed bezel 1030 to facilitate the mounting of the air separation membrane 120.

FIG. 9 is a schematic block diagram of an air separation plant 100 according to another embodiment of the present invention; fig. 10 is a schematic exploded view of the air separation unit 100 shown in fig. 9. In the embodiment illustrated in fig. 9-10, the air separation plant 100 includes a base frame 110 and a stacking frame 1100. The base frame 110 is located at the lower portion, the upper side surface of the base frame 110 is formed as a base supporting surface, and the base supporting surface is paved with the air separation membrane 120, and the base frame 110 paved with the air separation membrane 120 can be referred to the structure 11 located at the lower portion shown in fig. 10. The stacking support surface 1107 of the stacking frame 1100 is located on the outside and is laid with the air separation membrane 120, and the stacking frame 1100 laid with the air separation membrane 120 can be referred to the structure 1 located on the upper side shown in fig. 10. In this embodiment, the stacking frame 1100 may have the same structure as the stacking frame 1100 shown in fig. 1 to 3.

FIG. 11 is a schematic exploded view of the substructure 11 shown in FIG. 10; FIG. 12 is an enlarged schematic view of region C of FIG. 11; fig. 13 is a schematic cross-sectional view of the lower structure 11 shown in fig. 10. Referring to fig. 11-13, in an alternative embodiment of the present invention, the base frame 110 further comprises: a base frame 102 and a plurality of ribs 1102, the base frame 102 defining an open receiving cavity 1101 therein. A plurality of ribs 1102 are spaced apart at the aforementioned opening of the receiving cavity 1101. The outer side surfaces of the plurality of ribs 1102 form the aforementioned base support surface for laying the air separation membrane 120; the plurality of ribs 1102 in combination with the receiving chamber 1101 define an enriched gas collection chamber.

The air separation membrane 120 is provided on the outer side surfaces of the plurality of ribs 1102. As will be appreciated by those skilled in the art, the inner side surfaces of the ribs 1102 are the surfaces of the ribs 1102 facing the accommodating cavity 1101 or the surfaces of the ribs 1102 facing away from the opening, and the outer side surfaces of the ribs 1102 are the surfaces of the ribs 1102 facing away from the accommodating cavity 1101 or the surfaces of the ribs 1102 facing the opening.

In some embodiments, the surface of the open periphery of the base bezel 102 is recessed flush with the outer side surfaces of the plurality of ribs 1102 to collectively form the mounting groove 114, and the air separation membrane 120 is embedded in the mounting groove 114. The surface of the open periphery of the rim 102 is further recessed at the periphery of the mounting recess 114 to form a ring of annular grooves 115 for filling with a sealant 130 to sealingly mount the air separation membrane 120 in the mounting recess 114. In some embodiments, to further facilitate installation, a ring of double-sided adhesive 140 may be used to pre-fix the air separation membrane 120 in the installation recess 114, and then a ring of sealant 130 may be filled in the loop groove 115 to sealingly install the air separation membrane 120 in the installation recess 114.

in some embodiments, the edges of the outer side surfaces of the ribs 1102 are chamfered, so that the contact area between the ribs 1102 and the air separation membrane 120 can be reduced, further enhancing the gas fluidity inside the enriched gas collection chamber.

In some embodiments, the suction holes 101 are provided at one circumferential side of the bezel 102. It should be understood by those skilled in the art that the "circumferential side" is a circumferential sidewall of any side of the frame 102 perpendicular to a plane in which the opening of the receiving cavity 1101 is located. In such an embodiment, the axis of the bleed holes 101 is parallel to the outer side surface of the base support surface or rib 1102. Further, the axis of the suction hole 101 is on the vertical plane of the base support surface. A "vertical bisecting plane" herein is a plane perpendicular to and bisecting the base support surface. That is, the air suction holes 101 are provided at the middle of one side of the circumference of the frame 102, which is provided to facilitate uniform ventilation of each part of the air separation membrane 120.

The plurality of ribs 1102 are preferably arranged at equal intervals and extend in the same direction. In some embodiments, the axial direction of the pumping holes 101 is the same as the direction of the plurality of ribs 1102. With such an arrangement, the gas entering the space between the rib plates 1102 can flow into the air suction holes 101 quickly, so that the ventilation inside the enriched gas collection chamber is accelerated, and the gas separation rate of the air separation device 100 can be increased.

referring to fig. 12, the suction holes 101 may be provided to protrude outward from the outer side surfaces of the ribs 1102. The pumping hole 101 faces two ribs 1102 of the plurality of ribs 1102. That is, the projected contour of the cross section of the suction hole 101 on a plane perpendicular to the axis of the suction hole 101 at least partially coincides with the projected contour of the cross section of either one of the two ribs 1102 on a plane perpendicular to the axis of the suction hole 101. The outer side surfaces of the two ribs 1102 adjacent to the air suction hole 101 are raised outward to form protrusions 1103, and the two protrusions 1103 form a flow guide passage aligned with the air suction hole 101 to enlarge the amount of air taken into the air suction hole 101. In such an embodiment, the two protrusions 1103 raise the respective areas of the air separation membrane 120, thereby forming air flow passages communicating with the suction holes 101 outside the ribs 1102, further increasing the air guide rate. In such an embodiment, the space between the bottom wall of the receiving cavity 1101 and the inner side surface of the rib 1102 can be set small, requiring only some clearance. Therefore, the volume of the enriched gas collection chamber can be greatly reduced, which is advantageous for the miniaturization of the air separation apparatus 100.

in an alternative embodiment, the extending direction of the plurality of ribs 1102 may also form an angle with the axial extending direction of the pumping hole 101.

in an alternative embodiment, another one or more stacked frames 1100 may be further stacked outside the stacked frame 1100, so that the specific gas in the air outside the air separation device 100 enters the enriched gas collecting chamber of the base frame 110 through the multi-layered air separation membrane 120 to be pumped away by the suction pump. In such embodiments, the purity of the air separation may be enhanced.

The adjacent base frames 110 and the stacking frames 1100 and the adjacent two stacking frames 1100 may be detachably mounted together using fasteners provided on the rims.

In the embodiment of the present invention, the base frame 110 and the stacking frame 1100 may be made of plastic since the specific structure of the base frame 110 and the stacking frame 1100 may ensure sufficient strength. The air separation device 100 of the embodiment of the invention is mainly used for separating air components, and when the air separation membrane 120 is an oxygen-rich membrane, the content of oxygen/nitrogen/carbon dioxide in the air can be adjusted through the air separation device 100, so that the air separation device can be applied to different application occasions (such as an oxygen-rich environment, a respirator/fresh keeping alive/oxygen-rich water and the like, a low-oxygen environment, an air-conditioned fresh-keeping/flame-retardant environment, a nitrogen-rich environment, a carbon dioxide-rich environment and the like). The air separation device 100 of the embodiment of the invention has a small volume, so that the air separation device is very suitable for food preservation of a refrigerator.

Therefore, the invention also provides a refrigerating and freezing device. Fig. 14 is a schematic configuration view of a refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 15 is a schematic configuration view of the refrigerating and freezing apparatus shown in fig. 14 as viewed from another angle; figure 16 is a schematic partial block diagram of a refrigeration freezer in accordance with one embodiment of the invention; fig. 17 is a schematic exploded view of the structure shown in fig. 16. As shown in fig. 14 to 17, the refrigerating and freezing apparatus according to the embodiment of the present invention may include a cabinet 200, a door (not shown), an air separation unit 100, a suction pump 41, and a refrigeration system.

the case 200 defines therein a storage space 211 and a compressor compartment 240. Specifically, the case 200 may include an inner container 210, and a storage space 211 is defined in the inner container 210. The door body is rotatably installed at the cabinet 200 and configured to open or close the storage space 211 defined by the cabinet 200. Further, a storage container is arranged in the storage space 211, and a modified atmosphere fresh-keeping space is arranged in the storage container. The air-conditioning fresh-keeping space can be a closed space or an approximately closed space. The storage container is preferably a drawer assembly. The storage container may include a drawer cylinder 220 and a drawer body 230. The drawer cylinder 220 may have a forward opening and be disposed in the storage space 211. The drawer body 230 is slidably disposed to the drawer cylinder 220 to operatively draw out and insert the drawer cylinder 220 inwardly from the forward opening of the drawer cylinder 220.

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 may be mounted within the compressor bin 240. The evaporator is configured to directly or indirectly provide cooling energy into the storage space 211.

The space around the air separation unit 100 is communicated with the modified atmosphere fresh-keeping space. More oxygen in the air of the modified atmosphere space may permeate the air separation membrane 120 into the enriched gas collection chamber than nitrogen therein. The suction pump 41 may be disposed within the compressor compartment 240 to fully utilize the compressor compartment 240 space. The air pump 41 does not occupy other places additionally, so that the additional volume of the refrigerating and freezing device is not increased, and the structure of the refrigerating and freezing device can be compact. The inlet end of the suction pump 41 communicates with the enriched gas collection chamber of the air separation unit 100 via a line 50 to pump out the gas permeating into the enriched gas collection chamber to the outside of the storage container.

In this embodiment, the air pump 41 pumps air outwards to make the pressure of the enriched gas collecting chamber lower than the pressure of the space surrounding the air separation device 100, and further, to make oxygen in the space surrounding the air separation device 100 enter the enriched gas collecting chamber. Because the atmosphere-controlled fresh-keeping space is communicated with the surrounding space of the air separation device 100, the air in the atmosphere-controlled fresh-keeping space can enter the surrounding space of the air separation device 100, so that the oxygen in the air in the atmosphere-controlled fresh-keeping space can also enter the enriched gas collecting cavity, and the nitrogen-rich and oxygen-poor gas atmosphere can be obtained in the atmosphere-controlled fresh-keeping space to be beneficial to the fresh keeping of food.

In some embodiments, as shown in fig. 16 and 17, the air separation device 100 may be disposed on a barrel wall of the drawer barrel 220, preferably horizontally disposed on a top wall of the drawer barrel 220. Specifically, a receiving cavity 221 is provided in the top wall of the drawer cylinder 220 to receive the air separation device 100. At least one first vent hole 222 and at least one second vent hole 223 which are communicated with the accommodating cavity 221 are formed on the wall surface between the accommodating cavity 221 of the drawer cylinder 220 and the atmosphere-controlled space. The first vent hole 222 is spaced apart from the second vent hole 223 to communicate the receiving cavity 221 with the modified atmosphere space at different locations, respectively. The first vent hole 222 and the second vent hole 223 are small holes, and the number of the first vent hole and the second vent hole can be multiple.

In some embodiments, to facilitate the flow of air between the modified atmosphere space and the receiving cavity 221, the refrigerated freezer may further comprise a blower 60 disposed in the receiving cavity 221 and configured to facilitate the flow of air from the modified atmosphere space into the receiving cavity 221 through the first vent hole 222 and to facilitate the flow of air from the receiving cavity 221 into the modified atmosphere space through the second vent hole 223. The fan 60 is preferably a centrifugal fan, and is disposed in the accommodating chamber 221 at the first vent hole 222. That is, the centrifugal fan is located above the at least one first vent hole 222, and the air inlet is opposite to the first vent hole 222. The air outlet of the centrifugal fan may be directed towards the air separation unit 100. The air separation device 100 is disposed above the at least one second vent 223 such that the air separation membrane 120 of the air separation device 100 is parallel to the top wall of the cartridge 22. The first vent hole 222 may be provided at the front of the top wall and the second vent hole 223 may be provided at the rear of the top wall. That is, the centrifugal fan is disposed at the front of the accommodating chamber 221, and the air separation device 100 is disposed at the rear of the accommodating chamber 221. Further, the top wall of the drawer cylinder 220 may include a main plate portion 224 and a cover plate portion 225, an upper surface of the main plate portion 224 forms a concave groove, and the cover plate portion 225 covers the concave groove to form the receiving cavity 221.

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. An air separation plant, comprising:

A plurality of air separation membranes respectively disposed on said base support surface and said overlying support surface, each of said air separation membranes being configured such that a particular gas in the flow of air in the space surrounding said air separation plant permeates said air separation membrane more than other gases therein to enter said enriched gas collection chamber; wherein

The base frame includes:

a base frame with a hollow interior;

the first rib plate group is arranged inside the foundation frame and comprises a plurality of first wide rib plates which are arranged at intervals, and a plurality of first narrow rib plates are arranged between every two adjacent first wide rib plates at intervals; and

a second rib plate group arranged inside the basic frame, wherein the second rib plate group also comprises a plurality of second wide rib plates arranged at intervals, and a plurality of second narrow rib plates are arranged between every two adjacent second wide rib plates at intervals, wherein

The second rib group is arranged on the inner side surface of the first rib group, a plurality of ribs of the second rib group are arranged in a crossing mode with a plurality of ribs of the first rib group, gaps between adjacent ribs jointly form the enriched gas collecting cavity, and the outer side surface of the first rib group and the outer side surface of the second rib group respectively form one foundation supporting surface;

Each second broad rib plate is inwards sunken from the outer side surface of the second broad rib plate to form a second groove;

A part of the surface of the inner side of each of the first wide ribs extends toward the second rib group to be flush with the outer side surface of the second rib group, and is recessed inward from the part of the surface flush with the outer side surface of the second rib group to form a third groove; wherein the third groove is communicated with the intersection of the second groove to form a cross groove;

2. Air separation unit according to claim 1,

the base frame comprises a pumping hole communicated with the enriched gas collecting cavity to allow the specific gas in the enriched gas collecting cavity to be output;

The plurality of rib plates of the first rib plate group are arranged in the base frame at intervals along the longitudinal direction and extend along the transverse direction; the plurality of ribs of the second rib group are arranged at intervals in the transverse direction on the inner side surface of the first rib group and extend in the longitudinal direction.

3. The air separation unit of claim 2, wherein each of the stacking frames comprises:

a hollow superimposed frame inside; and

4. Air separation unit according to claim 3,

The number of the stacking frames is two, the two stacking frames are respectively and detachably stacked on the outer sides of the two basic supporting surfaces of the basic frame, and

5. The air separation device according to any one of claims 2 to 4, wherein the air separation membrane is an oxygen-rich membrane, and the specific gas is oxygen.

6. a refrigeration freezer apparatus, comprising:

the air separation plant of claim 5, the ambient space of which is in communication with the modified atmosphere space; and