CN106766563B

CN106766563B - Oxygen-enriched membrane module and refrigerating and freezing device

Info

Publication number: CN106766563B
Application number: CN201611097449.XA
Authority: CN
Inventors: 王磊; 毕云龙; 王英星; 刘浩泉; 辛若武
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Co Ltd
Priority date: 2016-12-02
Filing date: 2016-12-02
Publication date: 2019-12-24
Anticipated expiration: 2036-12-02
Also published as: CN106766563A; WO2018099453A1

Abstract

The invention provides an oxygen-enriched membrane module and a refrigerating and freezing device. The oxygen-enriched membrane module comprises: the oxygen-enriched gas collection device comprises a support frame, a first gas collection chamber, a second gas collection chamber and a plurality of gas flow channels, wherein the support frame is provided with a first surface and a second surface which are parallel to each other, and is formed with a plurality of gas flow channels which respectively extend on the first surface and extend on the second surface and penetrate through the support frame to communicate the first surface and the second surface, and the plurality of gas flow channels jointly form the oxygen-enriched gas collection chamber; and two oxygen-rich membrane layers respectively laid on the first surface and the second surface of the support frame, wherein each oxygen-rich membrane layer is configured to enable oxygen in the airflow in the space around the oxygen-rich membrane assembly to penetrate more through the oxygen-rich membrane layer and enter the oxygen-rich gas collection cavity relative to nitrogen in the airflow. The invention provides the flat oxygen-enriched membrane component with the multi-channel oxygen-enriched gas collecting cavity by arranging the oxygen-enriched membranes on the first surface and the second surface of the supporting frame and forming the airflow channel communicated with the first surface and the second surface in the supporting frame.

Description

Oxygen-enriched membrane module and refrigerating and freezing device

Technical Field

The invention relates to the technical field of gas separation, in particular to an oxygen-enriched membrane assembly 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 deficiencies of the prior art by providing an oxygen-enriched membrane assembly suitable for use inside a refrigeration freezer to reduce the oxygen content in the storage space of the refrigeration freezer.

A further object of the first aspect of the present invention is to provide an oxygen-enriched membrane module which has a small volume, high strength and a significant oxygen-removing 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 oxygen-enriched membrane component to discharge oxygen in air in a space out of the space, so that nitrogen and oxygen are enriched and oxygen are depleted in the space to be beneficial to food fresh keeping, and the gas atmosphere reduces the intensity of aerobic respiration of fruits and vegetables by reducing the content of oxygen in the fruit and vegetable storage space, simultaneously ensures the basic respiration effect, prevents the anaerobic respiration of the fruits and vegetables, and achieves the purpose of long-term fresh keeping of the fruits and vegetables.

According to a first aspect of the present invention, there is provided an oxygen-rich membrane module comprising:

a support frame having a first surface and a second surface parallel to each other, and formed with a plurality of gas flow channels extending over the first surface, the second surface, and through the support frame to communicate the first surface and the second surface, respectively, the plurality of gas flow channels collectively forming an oxygen-enriched gas collection chamber; and

two oxygen-rich membrane layers respectively laid on the first surface and the second surface of the support frame, wherein each oxygen-rich membrane layer is configured to enable oxygen in the gas flow around the oxygen-rich membrane component to penetrate into the oxygen-rich gas collecting cavity more than nitrogen in the gas flow.

Optionally, the support frame includes a pumping hole in communication with the plurality of gas flow passages to allow the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be output.

Optionally, the support frame further comprises:

a frame;

the first rib 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 rib plates form the first surfaces; and

a plurality of second ribs provided at intervals in the lateral direction on the other side surfaces of the plurality of first ribs and extending in the longitudinal direction, one side surfaces of the plurality of second ribs remote from the first ribs forming the second surfaces,

wherein gaps between adjacent ones of the first ribs, adjacent ones of the second ribs, and adjacent ones of the first and second ribs form the plurality of airflow passages.

Optionally, the plurality of first 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;

the plurality of second ribs 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; wherein

Each first broad rib plate is inwards sunken from one side surface of the first broad rib plate, which forms the first surface, to form a first groove;

each of the second broad ribs is recessed inward from a side surface thereof on which the second surface is formed to form a second groove.

Optionally, a part of the surface of each first rib facing away from the first surface extends towards the second rib to be flush with the second surface, and a third groove is formed by inwards recessing the part of the surface flush with the second surface; wherein the third groove is communicated with the intersection of the second groove to form a cross groove; and/or

A portion of a surface of at least one of the second ribs facing away from the second surface extends toward the first rib to be flush with the first surface, and is recessed inwardly from the portion flush with the first surface 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 number of the first broad ribs is two, which divides each of the second broad ribs into three halves in the longitudinal direction;

the number of the second wide rib plates is more than four, and the second wide rib plates are arranged at equal intervals along the transverse direction;

the air exhaust holes are formed in the longitudinal middle of the frame and are formed in one transverse side of the frame.

Optionally, a groove extending in the lateral direction and aligned with the center of the suction hole is formed on one side surface of the second plurality of narrow ribs adjacent to the suction hole, the side surface forming the second surface, to enlarge the amount of intake air of the suction hole.

Optionally, the two side surfaces of the circumferential inner side of the frame are respectively recessed to be flush with the first surface and the second surface, so as to respectively form mounting grooves on the two side surfaces of the frame, and each oxygen-enriched membrane layer is embedded into one mounting groove;

the surfaces of two sides of the frame are respectively sunken in the periphery of the mounting groove to form a ring of annular wire grooves for filling sealant so as to hermetically mount each oxygen-enriched film layer in one mounting groove.

Optionally, an edge of one side surface of the first rib forming the first surface is chamfered;

the edge of one side surface of the second rib forming the second surface is chamfered.

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 oxygen-enriched membrane assembly of any one of the preceding; and

and the inlet end of the air pump is communicated with the oxygen-enriched gas collecting cavity of the oxygen-enriched membrane component through a pipeline so as to pump and discharge the gas penetrating into the oxygen-enriched gas collecting cavity to the outside of the modified atmosphere preservation space.

The oxygen-enriched membrane module of the invention provides a flat-type oxygen-enriched membrane module with a multi-channel oxygen-enriched gas collecting cavity by specially designing the supporting frame to form a plurality of gas flow channels which respectively extend on the first surface and the second surface and penetrate through the supporting frame to communicate the first surface with the second surface, and enabling the plurality of gas flow channels to jointly form the oxygen-enriched gas collecting cavity, and arranging the oxygen-enriched membrane layers on the first surface and the second surface of the supporting frame.

Furthermore, the supporting frame is provided with a plurality of first ribbed plates which are spaced along the longitudinal direction and extend along the transverse direction and a plurality of second ribbed plates which are spaced along the transverse direction and extend along the longitudinal direction on one side surface of the first ribbed plates, 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 is greatly enhanced. In addition, the above-mentioned structure of braced frame has guaranteed that the oxygen boosting rete can obtain sufficient support, even also can remain better roughness throughout under the great condition of the inside negative pressure in oxygen boosting gas collection chamber, has guaranteed the life of oxygen boosting membrane module.

Furthermore, the first rib plates and the second rib plates are arranged, so that the strength of the supporting frame is further enhanced, and the oxygen-enriched film layer is further ensured to obtain 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 in the oxygen-enriched gas collecting cavity is large, and the oxygen separation effect of the oxygen-enriched membrane component is improved.

Furthermore, the groove which extends along the transverse direction and is aligned with the center of the air extraction hole is formed on the surface, on the side forming the second surface, of the second narrow rib plates adjacent to the air extraction hole, so that the air inflow of the air extraction hole is expanded, the air guide rate is further increased, and the oxygen separation effect of the oxygen-enriched membrane module is further improved.

Furthermore, the installation groove and the loop line groove are formed on the frame of the support frame, so that the oxygen-enriched film layer can be conveniently, quickly and reliably installed on the frame, and the air tightness of the oxygen-enriched film component is ensured.

The refrigerating and freezing device is provided with the oxygen-enriched membrane component and the air pump, and the air pump can enable the pressure on the inner side of the oxygen-enriched membrane to be smaller than the pressure on the outer side, so that a nitrogen-enriched and oxygen-deficient gas atmosphere which is beneficial to food preservation can be formed in the air-conditioned preservation space.

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 oxygen-rich membrane module according to one embodiment of the invention;

FIG. 2 is a schematic exploded view of the oxygen-rich membrane module shown in FIG. 1;

FIG. 3 is a schematic block diagram of the support frame shown in FIG. 2;

FIG. 4 is an enlarged schematic view of region A in FIG. 3;

FIG. 5 is a schematic block diagram of the support frame of FIG. 2 viewed from another angle;

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

FIG. 7 is a schematic cross-sectional view taken along section line C-C in FIG. 5;

fig. 8 is a schematic layout structure view of a refrigerating and freezing apparatus according to an embodiment of the present invention;

fig. 9 is a schematic configuration view of the refrigerating and freezing apparatus shown in fig. 8 viewed from another angle;

fig. 10 is a schematic partial structural view of a refrigeration freezer in accordance with one embodiment of the invention;

fig. 11 is a schematic exploded view of the structure shown in fig. 10.

Detailed Description

FIG. 1 is a schematic block diagram of an oxygen-rich membrane assembly 100 according to one embodiment of the invention; fig. 2 is a schematic exploded view of the oxygen-enriched membrane assembly 100 shown in fig. 1. Referring to fig. 1 and 2, an oxygen-rich membrane module 100 according to an embodiment of the invention may generally comprise: a support frame 110 and an oxygen-rich membrane layer 120 disposed on the support frame 110.

In an embodiment of the present invention, the oxygen-rich membrane layer 120 may include one or more oxygen-rich membranes. The oxygen-rich membrane is permeable to all gases except for different gases having different degrees of permeability. The permeation mechanism of gas through an oxygen-enriched membrane is generally that gas molecules are first adsorbed to the surface of the oxygen-enriched membrane to be dissolved, then diffused in the oxygen-enriched membrane, and finally desorbed from the other side of the oxygen-enriched membrane. The oxygen-enriched membrane separation technology realizes the separation of gases by means of the difference of the dissolution and diffusion coefficients of different gases in an oxygen-enriched membrane. When the mixed gas is under the action of a certain driving force (pressure difference or pressure ratio of two sides of the oxygen-enriched membrane), gases with quite high permeation rate, such as oxygen, hydrogen, helium, hydrogen sulfide, carbon dioxide and the like, permeate through the oxygen-enriched membrane and are enriched on the permeation side of the oxygen-enriched membrane, while gases with relatively low permeation rate, such as nitrogen, carbon monoxide and the like, are retained on the retention side of the oxygen-enriched membrane and are enriched, so that the purpose of separating the mixed gas is achieved.

FIG. 3 is a schematic block diagram of the support frame 110 shown in FIG. 2; FIG. 4 is an enlarged schematic view of region A in FIG. 3; fig. 5 is a schematic structural view of the support frame 110 shown in fig. 2, viewed from another angle; FIG. 6 is an enlarged schematic view of region B in FIG. 5; fig. 7 is a schematic cross-sectional view taken along section line C-C in fig. 5. Referring to fig. 3 to 7, the support frame 110 has a first surface 111 and a second surface 112 parallel to each other. The support frame 110 is formed with a plurality of airflow passages 113 extending on the first surface 111, on the second surface 112, respectively, and penetrating the support frame 110 to communicate the first surface 111 and the second surface 112. That is, the plurality of air flow channels 113 includes a plurality of first air flow channels extending on the first surface 111, a plurality of second air flow channels extending on the second surface 112, and a plurality of third air flow channels penetrating the support frame 110 to communicate the first surface 111 and the second surface 112. Alternatively, it is understood that the support frame 110 is formed with a plurality of first air flow passages extending on the first surface 111 and a plurality of second air flow passages extending on the second surface 112, and the first air flow passages and the second air flow passages communicate with each other through the third air flow passages. All gas flow channels 113 together form an oxygen enriched gas collection chamber.

The number of the oxygen-rich membrane layers 120 is two, and the two oxygen-rich membrane layers 120 are respectively laid on the first surface 111 and the second surface 112 of the support frame 110. The oxygen-rich membrane layer 120 is configured such that oxygen in the gas stream in the space surrounding the oxygen-rich membrane assembly 100 permeates the oxygen-rich membrane layer 120 more into the oxygen-rich gas collection chamber than nitrogen therein.

In some embodiments, the support frame 110 includes a pumping hole 101 in communication with the aforementioned plurality of gas flow passages 113 to allow the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be output. With the output of the oxygen-enriched gas in the oxygen-enriched gas collection cavity, the oxygen-enriched gas collection cavity is in a negative pressure state, so that oxygen in the air outside the oxygen-enriched membrane module 100 can continuously permeate the oxygen-enriched membrane layer 120 to enter the oxygen-enriched gas collection cavity, and the air outside the oxygen-enriched membrane module 100 forms a nitrogen-enriched atmosphere.

In some embodiments, the support frame 110 may be a generally rectangular frame in its entirety.

In some embodiments, the support frame 110 may include: the frame 102, a plurality of first ribs 1110 and a plurality of second ribs 1120. The first ribs 1110 are disposed at intervals in the longitudinal direction inside the frame 102 and extend in the transverse direction, and a first surface 111 is formed on one side surface of the first ribs 1110. The second ribs 1120 are disposed at intervals in the lateral direction on the other side surfaces of the first ribs 1110 and extend in the longitudinal direction, and the second surfaces 112 are formed on the side surfaces of the second ribs 1120 far from the first ribs 1110. That is, the plurality of second ribs 1120 are provided on one side surface of the plurality of first ribs 1110. The surfaces of the first ribs 1110 and the second ribs 1120 opposite to each other form a first surface 111 and a second surface 112, respectively; that is, the surfaces of the first ribs 1110 and the second ribs 1120 opposite to each other form the first surface 111; the surfaces of the second ribs 1120 and the first ribs 1110 opposite to each other form the second surface 112. The gaps between the adjacent first ribs 1110, the adjacent second ribs 1120, and the adjacent first ribs 1110 and second ribs 1120 form the plurality of airflow passages 113. Wherein a gap between two adjacent first ribs 1110 forms a first air flow channel extending on the first surface 111, a gap between two adjacent second ribs 1120 forms a second air flow channel extending on the second surface 112, and a gap between adjacent first ribs 1110 and second ribs 1120 forms a third air flow channel communicating the first surface 111 and the second surface 112 through the support frame 110. That is, the plurality of airflow passages 113 are formed by the intersection structure of all the first ribs 1110 and all the second ribs 1120.

Herein, the one side surface and the other side surface of the plurality of first ribs 1110 respectively refer to two surfaces facing away from each other which face neither the lateral direction nor the longitudinal direction of the first ribs 1110; that is, the one side surface and the other side surface of the first rib 1110 respectively refer to both surfaces of the first rib 1110 which face neither the extending direction nor the arrangement direction thereof. Accordingly, one side surface and the other side surface of the plurality of second ribs 1120 respectively refer to two surfaces facing away from each other of the second ribs 1120 which face neither the lateral direction nor the longitudinal direction; that is, the one side surface and the other side surface of the second ribs 1120 respectively refer to both surfaces of the second ribs 1120 which face neither the extending direction nor the arrangement direction thereof.

The supporting frame 110 of the present invention is provided with a plurality of first ribs 1110 spaced apart in a longitudinal direction and extending in a lateral direction and a plurality of second ribs 1120 spaced apart in the lateral direction and extending in the longitudinal direction on one side surface of the plurality of first ribs 1110 inside the frame 102, so that on one hand, the continuity of the airflow channel 113 is ensured, on the other hand, the volume of the supporting frame 110 is greatly reduced, and the strength of the supporting frame 110 is greatly enhanced. In addition, the above structure of the supporting frame 110 ensures that the oxygen-enriched membrane layer 120 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 100. In a further embodiment, the plurality of first ribs 1110 can include: a plurality of first narrow ribs 1111 and a plurality of first wide ribs 1112. Wherein the first broad ribs 1112 are arranged at intervals, and a plurality of first narrow ribs 1111 are arranged between two adjacent first broad ribs 1112. The plurality of second ribs 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 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 support 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 inward from a side surface thereof forming the first surface 111 to form the first groove 12; each second wide rib 1122 is recessed inward from a side surface thereof on which the second surface 112 is formed to form a second groove 22. It will be appreciated by those skilled in the art that in such an embodiment, the first grooves 12 face the first surface 111, the second grooves 22 face the second surface 112, and there is no interference between the first grooves 12 and the second grooves 22. 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 support frame 110 is improved on the premise of ensuring that the thickness (or the volume) of the support frame is small. Therefore, even under the condition that the negative pressure in the oxygen-enriched gas collecting cavity is large, 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 each first wide rib 1112 facing away from the first surface 111 extends toward the second rib 1120 to be flush with the second surface 112, and is recessed inwardly from the portion of the surface flush with the second surface 112 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 portion of at least one second wide rib 1122 of the plurality of second wide ribs 1122 facing away from the second surface 112 extends toward the first wide rib 1110 to be flush with the first surface 111, and is recessed inward from the portion flush with the first surface 111 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. In such an embodiment, one side surface of the first broad ribs 1112 forms the first surface 111, and the aforementioned partial surface of the other side forms the second surface 112; one side surface of the second wide rib 1122 forms the second surface 112, and the aforementioned partial surface of the other side forms the first surface 111. 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. 3. The number of the second wide ribs 1122 forming the fourth grooves 25 is four, and as shown in fig. 5, two of the second wide ribs are located in the middle of the frame 102, and two of the second wide ribs are located on two lateral sides of the frame 102. About 4 to 6 second narrow ribs 1121 may be disposed between two adjacent second wide ribs 1122.

The suction hole 101 may be provided to communicate with both a first air flow passage extending on the first surface 111 and a second air flow passage extending on the second surface 112. Preferably, the center of the pumping hole 101 is in the same plane with the interface of the first rib 1110 and the second rib 1120, so as to facilitate the circulation of the gas path inside the oxygen-enriched gas collection chamber.

The pumping hole 101 may be provided at one lateral side of the frame 102 at a longitudinal middle portion of the frame 102. The arrangement is equivalent to pumping air from the middle part of the oxygen-enriched membrane component 100, which is beneficial to the uniform ventilation of the oxygen-enriched membrane layer 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. 3, a groove 21 extending in the transverse direction and aligned with the center of the pumping hole 101 is formed on one side surface of the second narrow ribs 1121, which is adjacent to the pumping hole 101, forming the second surface 112, so as to enlarge the amount of air taken by the pumping hole 101, further increasing the air guide rate, and further improving the oxygen separation effect of the oxygen enrichment membrane module 100.

In some embodiments, the edge of the side surface of the first rib 1110 that forms the first surface 111 is chamfered; the edges of the second ribs 1120 forming the second surface 112 are chamfered, so that the contact area between the first ribs 1110 and the second ribs 1120 and the oxygen-enriched membrane layer 120 can be reduced, and the gas fluidity inside the oxygen-enriched gas collection chamber can be further enhanced.

In some embodiments, two side surfaces of the circumferential inner side of the frame 102 are recessed flush with the first surface 111 and the second surface 112, respectively, so as to form a mounting groove 114 on each side surface of the frame 102, and each oxygen-rich membrane layer 120 is embedded in one mounting groove 114. The two side surfaces of the frame 102 are recessed into the periphery of the mounting groove 114 to form a ring of annular grooves 115 for filling the sealant 130, so as to sealingly mount the oxygen-enriched membrane layer 120 in the mounting groove 114. According to the invention, the mounting groove 114 and the loop line groove 115 are formed on the frame 102 of the support frame 110, so that the oxygen-enriched membrane layer 120 can be conveniently, quickly and reliably mounted on the support frame 110, the air tightness of the oxygen-enriched membrane assembly 100 is ensured, and a sufficient pressure difference can be formed between the inside and the outside of the oxygen-enriched membrane layer 120. When the oxygen-enriched membrane assembly 100 of the embodiment of the invention is used for the food preservation of a refrigerator, the sealant is guaranteed to be in a food-grade standard, namely, the sealant is guaranteed not to generate peculiar smell and harmful volatile substances.

In some embodiments, referring to fig. 2, to further facilitate installation, a ring of double-sided adhesive 140 may be used to pre-fix the oxygen-enriched membrane layer 120 in the installation groove 114, and then a ring of sealant 130 is filled in the loop line groove 115 to sealingly install the oxygen-enriched membrane layer 120 in the installation groove 114.

In a preferred embodiment, the first plurality of ribs 1110 and the second plurality of ribs 1120 can be a single piece; in an alternative embodiment, the plurality of second ribs 1120 and the plurality of first ribs 1110 may be separate plates, and the plurality of second ribs 1120 are adhered to the inner surfaces of the plurality of first ribs 1110, for example.

In the embodiment of the present invention, since the specific structure of the support frame 110 can ensure sufficient strength, the support frame 110 may be made of plastic. The support frame 110 is preferably integrally injection molded from plastic.

The oxygen-enriched membrane component 100 is mainly used for separating air components, and can adjust the content of oxygen or nitrogen or carbon dioxide in the air, so that the oxygen-enriched membrane component can be applied to different application occasions (such as an oxygen-enriched environment, a ventilator or fresh keep-alive or oxygen-enriched water and the like, a low-oxygen environment, an air-conditioned fresh-keeping or flame-retardant environment, a nitrogen-enriched environment, a carbon dioxide-enriched environment and the like). The oxygen-enriched membrane component 100 provided by the embodiment of the invention is small in size, so that the oxygen-enriched membrane component is very suitable for food preservation of a refrigerator.

Therefore, the invention also provides a refrigerating and freezing device. Fig. 8 is a schematic configuration view of a refrigerating and freezing apparatus according to an embodiment of the present invention, and fig. 9 is a schematic configuration view of the refrigerating and freezing apparatus shown in fig. 8 as viewed from another angle; fig. 10 is a schematic partial structural view of a refrigeration freezer in accordance with one embodiment of the invention; fig. 11 is a schematic exploded view of the structure shown in fig. 10. As shown in fig. 8 to 11, the refrigerating and freezing apparatus according to the embodiment of the present invention may include a box 200, a door (not shown), an oxygen-enriched membrane assembly 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 oxygen-enriched membrane component 100 is communicated with the air-conditioned fresh-keeping space. More oxygen in the air of the modified atmosphere space can permeate the oxygen-rich membrane layer 120 into the oxygen-rich gas collection chamber than nitrogen in the air. 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 is communicated with the oxygen-enriched gas collection chamber of the oxygen-enriched membrane assembly 100 via a pipeline 50 to pump out the gas permeating into the oxygen-enriched gas collection chamber to the outside of the storage container.

In this embodiment, the air pump 41 pumps air outwards, so that the pressure of the oxygen-enriched gas collection chamber can be lower than the pressure of the space around the oxygen-enriched membrane assembly 100, and further, oxygen in the space around the oxygen-enriched membrane assembly 100 can enter the oxygen-enriched gas collection chamber. Because the atmosphere-controlled fresh-keeping space is communicated with the surrounding space of the oxygen-enriched film component 100, the air in the atmosphere-controlled fresh-keeping space can enter the surrounding space of the oxygen-enriched film component 100, so that the oxygen in the air in the atmosphere-controlled fresh-keeping space can enter the oxygen-enriched gas collecting cavity, and the nitrogen-enriched and oxygen-deficient air atmosphere in the atmosphere-controlled fresh-keeping space is obtained to be favorable for keeping food fresh. In some embodiments, as shown in fig. 10 and 11, the oxygen-enriched membrane assembly 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 oxygen-enriched membrane assembly 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 211 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 face the oxygen enrichment membrane assembly 100. The oxygen-enriched membrane assembly 100 is disposed above the at least one second vent 223 such that each oxygen-enriched membrane layer 120 of the oxygen-enriched membrane assembly 100 is parallel to the top wall of the cylinder 22. A first vent hole 222 is provided in the front of the top wall and a second vent hole 223 is provided in the rear of the top wall. That is, the centrifugal fan is disposed at the front of the accommodating chamber 221, and the oxygen enrichment membrane module 100 is disposed at the rear of the accommodating chamber 221.

Further, the top wall of the drawer cylinder 220 includes a main plate portion 224 and a cover plate portion 225, a concave groove is formed on the upper surface of the main plate portion 224, and the cover plate portion 225 covers the concave groove to form the receiving cavity 221.

It should be understood by those skilled in the art that the terms "transverse direction", "longitudinal direction", etc. used to indicate the orientation or positional relationship in the embodiments of the present invention are based on the oxygen-enriched membrane module 100 or the support frame 110 shown in fig. 1 to 6, and these terms are only used for convenience of description and understanding of the technical solution of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

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 oxygen-rich membrane assembly, comprising:

two oxygen-rich membrane layers respectively laid on the first surface and the second surface of the support frame, wherein each oxygen-rich membrane layer is configured to enable oxygen in the gas flow around the oxygen-rich membrane component to penetrate into the oxygen-rich gas collecting cavity more than nitrogen in the gas flow; wherein

The support frame includes a pumping hole communicating with the plurality of gas flow passages to allow the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be output;

the support frame further includes:

the air exhaust hole is formed in the longitudinal middle of the frame and is arranged on one transverse side of the frame;

2. The oxygen-enriched membrane module of claim 1,

the plurality of first ribs includes: 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;

3. The oxygen-enriched membrane module of claim 2,

a part of the surface of each first wide rib facing away from the first surface extends towards the second rib to be flush with the second surface, and a third groove is formed by inwards recessing the part of the surface flush with the second surface; wherein the third groove is communicated with the intersection of the second groove to form a cross groove; and/or

4. An oxygen-rich membrane module of claim 3,

the number of the first wide rib plates is two, and each second wide rib plate is divided into three equal parts in the longitudinal direction;

the extraction hole is a step hole.

5. An oxygen-rich membrane module of claim 4,

a groove extending in the lateral direction and aligned with the center of the air suction hole is formed on one side surface of the second narrow ribs adjacent to the air suction hole, which forms the second surface, to enlarge the amount of intake air of the air suction hole.

6. The oxygen-enriched membrane module of claim 1,

the surfaces of two sides of the circumferential inner side of the frame are respectively recessed and flush with the first surface and the second surface so as to respectively form mounting grooves on the surfaces of the two sides of the frame, and each oxygen-enriched film layer is embedded into one mounting groove;

7. The oxygen-enriched membrane module of claim 1,

the edge of one side surface of the first rib plate forming the first surface forms a chamfer;

8. A refrigeration freezer apparatus, comprising:

the oxygen-enriched membrane module as claimed in any one of claims 1 to 7, wherein the surrounding space is communicated with the atmosphere-controlled fresh-keeping space, wherein the air-extracting hole of the oxygen-enriched membrane module is a stepped hole; and