CN106705543B

CN106705543B - Oxygen-enriched membrane module and refrigerating and freezing device

Info

Publication number: CN106705543B
Application number: CN201611097126.0A
Authority: CN
Inventors: 王磊; 王晶; 毕云龙; 王英星
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2016-12-02
Filing date: 2016-12-02
Publication date: 2020-05-26
Anticipated expiration: 2036-12-02
Also published as: CN106705543A

Abstract

The invention provides an oxygen-enriched membrane module and a refrigerating and freezing device. The oxygen-enriched membrane component comprises two oxygen-enriched membranes which are arranged at intervals; the support frame and the two oxygen-enriched membranes jointly define a plurality of oxygen-enriched gas collecting cavities which are arranged around the gas outlet cavity and are respectively and directly communicated with the gas outlet cavity; the oxygen-enriched membrane module is configured to: the oxygen in the air flow around the oxygen-enriched gas collecting cavity penetrates more oxygen-enriched film than nitrogen and enters the oxygen-enriched gas collecting cavity, and then is discharged through the gas outlet cavity. The oxygen-enriched membrane component has the advantages of small volume, high strength and good oxygen removal effect.

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 present invention to address the above-mentioned deficiencies of the prior art by providing an oxygen-enriched membrane assembly suitable for use in a refrigeration freezer for reducing the oxygen content in the storage space of the refrigeration freezer.

The invention further aims to provide the oxygen-enriched membrane component which is small in size, high in strength and good in oxygen-removing effect.

Another object of the present invention is to provide a refrigerating and freezing apparatus using the oxygen-rich membrane module.

In one aspect, the present invention provides an oxygen-enriched membrane module comprising:

two oxygen-enriched membranes are arranged at intervals; and

the support frame is arranged between the two oxygen-enriched membranes to support the two oxygen-enriched membranes, the support frame and the two oxygen-enriched membranes jointly define a plurality of oxygen-enriched gas collecting cavities which are arranged around the gas outlet cavities and are respectively and directly communicated with the gas outlet cavities;

the oxygen-enriched membrane module is configured to: the oxygen in the air flow around the oxygen-enriched gas collecting cavity penetrates more oxygen-enriched film than nitrogen and enters the oxygen-enriched gas collecting cavity, and then is discharged through the gas outlet cavity.

Optionally, the support frame comprises a closed outer rim; a central support portion defining an air outlet cavity, disposed within the space enclosed by the outer frame; the two ends of each supporting spoke are respectively connected with the outer frame and the central supporting part; the edges of the two oxygen-enriched films are hermetically connected to the two sides of the outer frame, and the inner side surfaces of the two oxygen-enriched films are attached and fixed to the supporting spokes, so that an oxygen-enriched gas collecting cavity is formed between every two adjacent supporting spokes.

Optionally, the outer frame is a circular ring structure; and the central supporting part is positioned at the circle center of the outer frame.

Optionally, each support spoke extends radially of the outer rim; and the included angle between every two adjacent supporting spokes is equal, so that the volumes of all the oxygen-enriched gas collecting cavities are equal.

Optionally, the central support portion includes a first plate and a second plate arranged in parallel at an interval, and an air outlet cavity is defined between the first plate and the second plate; an air outlet pipe communicated with the air outlet cavity is arranged on the first plate body; and the end part of each supporting spoke is connected to the edges of the first plate body and the second plate body, so that each oxygen-enriched gas collecting cavity is communicated with the gas outlet cavity.

Optionally, the support frame is an integral piece formed by an integral injection molding process.

Optionally, the outer rim has a thickness greater than the thickness of the support spokes to allow the outer periphery of each oxygen-enriched membrane to rest against the inside of the outer rim.

Optionally, each oxygen-rich membrane is affixed to the support spokes and the outer rim in a cohesive manner.

In another aspect, the present invention provides a refrigeration and freezing apparatus comprising:

the refrigerator comprises a box body, a storage space and a fresh-keeping space, wherein the storage space is limited in the box body and internally provided with a controlled atmosphere fresh-keeping space;

the oxygen-enriched membrane assembly as claimed in any one of the above claims, wherein the surrounding space is communicated with the atmosphere-controlled fresh-keeping space; and

and the air inlet end of the air pump is communicated with the air outlet 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 air-conditioned fresh-keeping space.

Optionally, the refrigerating and freezing device further comprises a drawer assembly, the drawer assembly comprises a drawer cylinder and a drawer body which is slidably mounted in the drawer cylinder, a modified atmosphere preservation space is defined in the drawer body, a containing cavity communicated with the modified atmosphere preservation space is formed in the top wall of the drawer cylinder to contain the oxygen-enriched film assembly, at least one first vent hole and at least one second vent hole spaced from the at least one first vent hole are formed in the wall surface between the containing cavity and the modified atmosphere preservation space, and the containing cavity and the modified atmosphere preservation space are communicated at different positions respectively; and the fan is arranged in the accommodating cavity and used for promoting the gas in the modified atmosphere space to return to the modified atmosphere space through the at least one first vent hole, the accommodating cavity and the at least one second vent hole in sequence.

The oxygen-enriched membrane component utilizes the support frame to support the oxygen-enriched membrane with a thinner thickness, so that the oxygen-enriched membrane component is more stable. In addition, through set up a plurality of oxygen-enriched gas collection chambeies between two-layer oxygen-enriched membrane, and make it around going out around the gas cavity, can make every oxygen-enriched gas collection chamber homoenergetic and go out the direct intercommunication of gas cavity, make gas flow out smoothly more rapidly, make the different region homoenergetic of oxygen-enriched membrane carry out the oxygen separation process high-efficiently, promoted the oxygen separation effect.

Furthermore, in the oxygen-enriched membrane component, the closed outer frame, the plurality of support spokes and the central support part are utilized to define the plurality of oxygen-enriched gas collecting cavities, so that the oxygen-enriched membrane component is simple in structure and easy to manufacture.

In addition, 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 one side of the oxygen-enriched membrane to be smaller than that on the other side, so that a nitrogen-enriched oxygen-poor gas atmosphere which is beneficial to food preservation can be formed in the air-conditioned fresh-keeping space.

Furthermore, the refrigerating and freezing device has good fresh-keeping effect, has low requirements on the rigidity and the strength of the storage container and the like, has low realization requirements and has low cost. Moreover, the technical problems which are expected to be solved but are not successfully solved by technicians in the field of modified atmosphere preservation are solved. The refrigerating and freezing device is small in size, low in noise and particularly suitable for being used by families and individuals.

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

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

FIG. 3 is an exploded cross-sectional view of the oxygen-rich membrane module shown in FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic partial block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention;

FIG. 6 is a schematic block diagram of another perspective of the structure shown in FIG. 5;

FIG. 7 is a schematic partial block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention;

fig. 8 is a schematic exploded view of the structure shown in fig. 7.

Detailed Description

FIG. 1 is a schematic diagram of the structure of an oxygen-rich membrane module according to one embodiment of the invention; FIG. 2 is an exploded schematic view of the oxygen-rich membrane module shown in FIG. 1; FIG. 3 is an exploded cross-sectional view of the oxygen-rich membrane module shown in FIG. 1; fig. 4 is an enlarged view of a portion a of fig. 3. As shown in fig. 1 to 4, the oxygen enrichment membrane assembly 30 of the present invention may generally include two

oxygen enrichment membranes

200 and 300 disposed at an interval and a support frame 100 disposed between the two

oxygen enrichment membranes

200 and 300 to support the two

oxygen enrichment membranes

200 and 300. The support frame 100 defines a gas outlet cavity 102, and the support frame 100 and the two oxygen-

rich membranes

200 and 300 together define a plurality of oxygen-rich gas collecting cavities 101 which are arranged around the gas outlet cavity 102 and are respectively directly communicated with the gas outlet cavity 102. The oxygen enrichment membrane assembly 30 is configured to allow more oxygen in the gas stream surrounding the oxygen enriched gas collection chamber 101 than nitrogen to permeate through the

oxygen enrichment membranes

200, 300 into the oxygen enriched gas collection chamber 101 and out through the outlet chamber 102. As the gas in the oxygen-enriched gas collection chamber 101 is pumped out, the oxygen-enriched gas collection chamber 101 will be under negative pressure, so that the oxygen in the gas flow in the space around the oxygen-enriched membrane assembly 30 will continuously permeate through the oxygen-enriched

membranes

200, 300 into the oxygen-enriched gas collection chamber 101. Of course, in order to continuously perform the oxygen separation process, a gas pump is usually connected to the gas outlet chamber 102 to pump out the gas in the oxygen-enriched gas collection chamber 101 in time, so as to create a negative pressure environment therein.

In embodiments of the present invention, each oxygen-

rich film

200, 300 may be a single layer film or a multi-layer film. 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 between 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, and 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.

Because the oxygen-enriched membrane is generally thin, the embodiment of the invention can ensure that the oxygen-enriched membrane obtains enough support by arranging the support frame 100, and can always keep enough space even under the condition of large negative pressure in the oxygen-enriched gas collection cavity 101, and the oxygen-enriched membrane cannot be mutually attached under stress.

In addition, in the embodiment of the present invention, the support frame 100 divides the space between the two oxygen-enriched

membranes

200 and 300 into the plurality of oxygen-enriched gas collecting cavities 101, and each oxygen-enriched gas collecting cavity 101 is directly communicated with the gas outlet cavity 102, so that the volume of each oxygen-enriched gas collecting cavity 101 is smaller, and the gas in the oxygen-enriched gas collecting cavity can flow out more smoothly and rapidly, and thus each region of the oxygen-enriched

membranes

200 and 300 can perform an oxygen separation process efficiently, and the oxygen separation effect is improved.

In some embodiments, to form the plurality of oxygen-enriched gas collection chambers 101 between the two oxygen-enriched

membranes

200, 300, the support frame 100 may include an outer frame 110, a central support portion 120, and a plurality of support spokes 130. The outer frame 110 is a closed structure (e.g., a square frame or a circular frame). The central support portion 120 is disposed in the space surrounded by the outer frame 110 and defines the air outlet cavity 102. Both ends of each supporting spoke 130 are connected to the outer frame 110 and the central supporting portion 120 (which may be integrally formed with the outer frame 110 and the central supporting portion 120), respectively. The edges of the two oxygen-enriched

membranes

200, 300 are hermetically connected to both sides of the outer frame 110, the inner surfaces of the oxygen-enriched

membranes

200, 300 are attached to the supporting spokes 130, so that an oxygen-enriched gas collecting cavity 101 is formed between every two adjacent supporting spokes 130, and the plurality of supporting spokes 130 can provide sufficient support for the oxygen-enriched

membranes

200, 300.

Each oxygen-enriched

membrane

200, 300 can be adhered to the supporting spokes 130 and the outer frame 110 by adhesion to ensure the air tightness of the oxygen-enriched membrane assembly 30, so that a sufficient pressure difference can be formed between the inside and the outside of the oxygen-enriched

membranes

200, 300. Of course, when the oxygen-enriched membrane assembly 30 of the embodiment of the invention is used in the preservation of refrigerator food, the adopted sealant should ensure the food grade standard, i.e. ensure that the sealant does not generate peculiar smell and harmful volatile substances.

As shown in fig. 1 to 3, in some embodiments, the outer frame 110 may be a circular ring structure, and the central support portion 120 is located at the center of the outer frame 110, i.e. a structure similar to a wheel is formed, so as to facilitate the fabrication and arrangement of the oxygen-enriched gas collection chambers 101.

Further, each supporting spoke 130 may extend along the radial direction of the circular ring-shaped outer frame 110 (and extend along a straight line), and the included angle between every two adjacent supporting spokes 130 is equal, so that the volumes of all the oxygen-enriched gas collecting cavities 101 are equal. Therefore, the pressure of the gas flowing from each oxygen-enriched gas collecting cavity 101 to the gas outlet cavity 102 tends to be the same, and the gases in the gas outlet cavity 102 are better merged and smoothly discharged.

Of course, in some alternative embodiments, the supporting spokes 130 may extend along a curve, not along the radial direction of the outer frame 110, or the outer frame 110 may have other shapes such as square, oval, etc., and these modifications will not be described herein. In some embodiments, as shown in fig. 3 and 4, the central support 120 includes a first plate 121 and a second plate 122 spaced apart in parallel, with the air outlet cavity 102 defined between the first plate 121 and the second plate 122. The ends of each support spoke 130 are connected to the edges of the first plate body 121 and the second plate body 122 so that each oxygen-enriched gas collection chamber 101 communicates with the gas outlet chamber 102. Specifically, the width of the end of the supporting spoke 130 may be made smaller than the width of the other portions so that the end is clamped between the first plate body 121 and the second plate body 122. In addition, the first plate body 121 may further be provided with an outlet pipe 123 communicating with the outlet cavity 102, and the outlet pipe 123 is used for connecting with a suction pump.

The first plate 121 and the second plate 122 may be circular plate structures, and the oxygen-enriched membrane 200 may have an abdicating circular hole 210, and after the oxygen-enriched membrane 200 is mounted, the edge of the abdicating circular hole 210 abuts against the outer circular surface of the first plate 121. Similarly, the oxygen-enriched membrane 300 may be formed with a relief circular hole 220, the edge of which abuts against the outer circumferential surface of the second plate 122.

In some embodiments, as shown in fig. 3 and 4, the thickness a of the outer frame 110 may be greater than the thickness of the support spokes 130 to form a step at the connection of the support spokes 130 and the outer frame 110, so as to facilitate abutting the outer periphery of the oxygen-enriched

membrane

200, 300 against the inner side of the outer frame 110, so that the oxygen-enriched

membrane

200, 300 is better fixed.

In the embodiment of the present invention, the supporting frame 100 (including the outer frame 110, the supporting spokes 130, the first plate 121, the second plate 122, and the outlet pipe 123) is an integral member formed by an integral injection molding process, so as to facilitate design and processing.

The oxygen-enriched membrane component 30 of the embodiment of the invention is mainly used for realizing the separation of air components, and the content of oxygen/nitrogen/carbon dioxide in the air can be adjusted through the component, so that the oxygen-enriched membrane component can be applied to different application occasions (such as oxygen-enriched environment, breathing machine/fresh keeping alive/oxygen-enriched water and the like, low-oxygen environment, controlled atmosphere preservation/flame retardant environment, nitrogen-enriched environment, carbon dioxide-enriched environment and the like). The oxygen-enriched membrane component 30 of the embodiment of the invention has smaller volume, so the oxygen-enriched membrane component is very suitable for food preservation of a refrigerator.

In another aspect, the present invention provides a refrigeration and freezing apparatus. FIG. 5 is a schematic partial block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention; FIG. 6 is a schematic block diagram of another perspective of the structure shown in FIG. 5; FIG. 7 is a schematic partial block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention; fig. 8 is a schematic exploded view of the structure shown in fig. 7. As shown in fig. 5 to 8, the refrigerating and freezing apparatus according to the embodiment of the present invention may include a box 80, a door, an oxygen-enriched membrane assembly 30, an air pump 10, and a refrigeration system.

The case 80 defines a storage space 201 therein. The door body is used for opening or closing the storage space 201. Further, a modified atmosphere fresh-keeping space is arranged in the storage space 201. The air-conditioning fresh-keeping space can be a closed space or an approximately closed space. Preferably, the storage container is a drawer assembly. The drawer assembly includes a drawer barrel 20 and a drawer body 28. The drawer body 28 defines the aforementioned modified atmosphere fresh space. The drawer cylinder 20 may have a forward opening and be disposed in the storage space 201, and particularly, may be disposed at a lower portion of the storage space 201. As can be appreciated by those skilled in the art, the drawer cylinder 20 may also be disposed in the middle or upper portion of the storage space 201. The drawer body 28 is slidably disposed within the drawer barrel 20 to operatively withdraw from and insert into the drawer barrel 20 outwardly from the forward opening of the drawer barrel 20. The drawer body 28 may have a drawer end cap that mates with the opening of the drawer barrel 20 to close the modified atmosphere fresh space.

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 13. The evaporator is configured to provide cooling energy directly or indirectly into the storage space 201. For example, when the refrigerating and freezing apparatus is a compression-type direct-cooling refrigerator for home use, the evaporator may be provided inside the cabinet 80. When the refrigerating and freezing device is a household compression type air-cooled refrigerator, the box body 80 is also internally provided with an evaporator chamber, the evaporator chamber is communicated with the storage space 201 through an air path system, an evaporator is arranged in the evaporator chamber, and a fan is arranged at an outlet of the evaporator chamber so as to circularly refrigerate the storage space 201.

The suction pump 10 may be disposed within the compressor bin 13. The air inlet end of the air pump 10 is communicated with the air outlet cavity 102 of the oxygen-enriched membrane module 30 via the pipeline 50 to pump out the air permeated into each oxygen-enriched air collecting cavity 101 to the outside of the air-conditioned fresh keeping space. By using the air pump 10 to pump air outwards, the pressure of each oxygen-enriched gas collection cavity 101 can be made lower than the pressure of the space around the oxygen-enriched membrane assembly 30, and further, oxygen in the space around the oxygen-enriched membrane assembly 30 can enter the oxygen-enriched gas collection cavity 101. Because the atmosphere-controlled fresh-keeping space is communicated with the surrounding space of the oxygen-enriched film component 30, the air in the atmosphere-controlled fresh-keeping space can enter the surrounding space of the oxygen-enriched film component 30, so that the oxygen in the air in the atmosphere-controlled fresh-keeping space can enter the oxygen-enriched gas collecting cavity 101, and the nitrogen-enriched and oxygen-deficient air can be obtained in the atmosphere-controlled fresh-keeping space to be beneficial to the gas atmosphere for keeping food fresh.

The refrigerating and freezing device can form a nitrogen-rich and oxygen-poor gas atmosphere in the controlled atmosphere preservation space so as 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 oxygen in the fruit and vegetable preservation space, ensures the basic respiration and prevents the fruits and vegetables from carrying out anaerobic respiration, thereby achieving the purpose of long-term preservation of the fruits and vegetables. In addition, the gas atmosphere also has a large amount of gases such as nitrogen and the like, the cooling efficiency of the articles in the modified atmosphere fresh-keeping space cannot be reduced, and the fruits, the vegetables and the like can be effectively stored. The refrigerating and freezing device of the invention well solves the technical problems which are always desired to be solved but are not always successfully solved by the technical personnel in the field of modified atmosphere preservation. The refrigerating and freezing device of the invention not only has small volume, but also has low noise, and is particularly suitable for families and individuals.

In some embodiments of the present invention, a plurality of micro holes may be formed on the drawer barrel 20, and the storage space 201 and the air-conditioning fresh-keeping space are communicated via the plurality of micro holes. The micropores may also be referred to as air pressure balance holes, and each micropore may be a millimeter-sized micropore, for example, each micropore having a diameter of 0.1mm to 3mm, preferably 1mm, 1.5mm, or the like. The arrangement of the plurality of micropores can prevent the pressure in the modified atmosphere preservation space from being too low, and the arrangement of the plurality of micropores can not cause the nitrogen in the modified atmosphere preservation space to flow to the large storage space 201, so that the flow is very small or even negligible, and the preservation of food in the modified atmosphere preservation space can not be influenced. In some optional embodiments of the present invention, the drawer cylinder 20 may not have micro holes, even though there is a large amount of gas such as nitrogen in the controlled atmosphere fresh-keeping space, the user does not need to spend much effort when pulling the drawer body 28 open, and compared with the existing vacuum storage chamber, the present invention can save much effort.

In some embodiments of the present invention, the storage space 201 is a refrigerated space, and the storage temperature is generally between 2 ℃ and 10 ℃, preferably between 3 ℃ and 8 ℃. Further, the box body 80 may further define a freezing space 12 and a temperature-changing space 27, the freezing space 12 is disposed below the storage space 201, and the temperature-changing space 27 is disposed between the freezing space 12 and the refrigerating space. The temperature in the refrigerated space 12 typically ranges from-14 ℃ to-22 ℃. The temperature-changing space 27 can be adjusted as needed to store suitable food. The compressor bin 24 is preferably disposed rearwardly and downwardly of the refrigerated space 12. In some alternative embodiments of the present invention, the storage space 201 may also be a freezing space or a temperature-changing space, that is, the temperature of the storage space 201 may be controlled to be in the range of-14 ℃ to-22 ℃ or adjusted according to the requirement.

In some embodiments of the present invention, as shown in fig. 7 and 8, the oxygen enrichment membrane assembly 30 may be disposed on the barrel wall of the drawer barrel 20. The oxygen enrichment membrane module 30 may be horizontally disposed at the top wall of the drawer cylinder 20. Specifically, a receiving cavity 22 is provided in the top wall of the drawer cylinder 20 to receive the oxygen-enriched membrane assembly 30. For example, at least one first vent hole 23 and a second vent hole 24 are opened in a wall surface between the receiving cavity of the top wall of the drawer cylinder 20 and the atmosphere control space. The at least one first vent 23 is spaced apart from the at least one second vent 24 to communicate the receiving cavity 22 with the modified atmosphere space at different locations, respectively. The first vent holes 23 and the second vent holes 24 are both small holes, and the number of the first vent holes and the number of the second vent holes can be multiple. In some alternative embodiments, the drawer barrel 20 has a recessed groove on the inside of the top wall. The oxygen-enriched membrane assembly 30 is disposed in a recess groove of the top wall of the drawer cylinder 20.

The conduit 50 may comprise an upright tube section. The vertical pipe section is arranged behind the storage space 201, the lower end of the vertical pipe section is communicated with an inlet of the air pump 10, and the upper portion of the vertical pipe section is communicated with the air outlet cavity 102 of the oxygen-enriched membrane component 30. The vertical pipe section can be arranged close to the side shell and the back plate in the box body 80, and the vertical pipe section can be sleeved with a heat insulation sleeve or a heat insulation pipe, so that cold energy in oxygen in the vertical pipe section can be prevented from being transmitted to the side shell and the back plate, and condensation can be prevented.

In some embodiments of the present invention, to facilitate the flow of air between the modified atmosphere space and the receiving cavity 22, the refrigerated freezer may further comprise a blower 60, and the blower 60 may be disposed in the receiving cavity and configured to facilitate the air in the modified atmosphere space to enter the receiving cavity 22 through the first vent hole 23 and to facilitate the air in the receiving cavity 22 to enter the modified atmosphere space through the second vent hole 24. That is, the fan 60 can cause the air in the modified atmosphere space to return to the modified atmosphere space through the at least one first vent 23, the receiving cavity, and the at least one second vent 24 in that order.

The fan 60 is preferably a centrifugal fan and is disposed in the accommodating chamber 22 at the first vent hole 23. That is, the centrifugal fan is located above the at least one first vent hole 23 with the axis of rotation vertically downward, and the air inlet is directly opposite the first vent hole 23. The air outlet of the centrifugal fan can face the modified atmosphere module 30. The modified atmosphere assembly 30 is disposed above the at least one second vent hole 24 such that each modified atmosphere of the modified atmosphere assembly 30 is parallel to the top wall of the drawer cylinder 20. At least one first ventilation aperture 23 is provided in the front of the top wall and at least one second ventilation aperture 24 is provided in the rear of the top wall. That is, the centrifugal fan is disposed at the front of the accommodating chamber 22, and the modified atmosphere module 30 is disposed at the rear of the accommodating chamber 22. Further, the top wall of the drawer cylinder 20 includes a main plate portion 25 and a cover plate portion 26, a recess portion is formed in a partial region of the main plate portion 25, and the cover plate portion 26 is detachably provided to cover the recess portion to form the accommodation chamber 22. To facilitate the manufacture of the drawer cylinder 20, the main plate 25 may be integrally formed with the side wall, the bottom wall, and the rear wall of the drawer cylinder 20.

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 module, comprising:

two oxygen-enriched membranes are arranged at intervals; and

the support frame is arranged between the two oxygen-enriched membranes to support the two oxygen-enriched membranes, the support frame is limited with an air outlet cavity, and the support frame and the two oxygen-enriched membranes jointly limit a plurality of oxygen-enriched gas collecting cavities which are arranged around the air outlet cavity and are respectively and directly communicated with the air outlet cavity;

the oxygen-rich membrane module is configured to: more oxygen in the airflow in the space around the oxygen-enriched gas collecting cavity permeates the oxygen-enriched membrane to enter the oxygen-enriched gas collecting cavity than nitrogen, and then is discharged through the gas outlet cavity; and the support frame includes:

a closed outer frame;

the central support part is limited with the air outlet cavity and is arranged in a space surrounded by the outer frame, the central support part comprises a first plate body and a second plate body which are arranged in parallel at intervals, and the air outlet cavity is limited between the first plate body and the second plate body;

a plurality of supporting spokes, wherein two ends of each supporting spoke are respectively connected to the outer frame and the central supporting part, and the width of the end part of each supporting spoke is smaller than that of the other part of the supporting spoke, so that the end part of each supporting spoke is clamped between the first plate body and the second plate body;

the edges of the two oxygen-enriched membranes are hermetically connected to the two sides of the outer frame, and the inner side surfaces of the two oxygen-enriched membranes are fixedly attached to the supporting spokes, so that one oxygen-enriched gas collecting cavity is formed between every two adjacent supporting spokes.

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

the outer frame is of a circular ring structure; and is

The central supporting part is positioned at the circle center of the outer frame.

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

each of the support spokes extends in a radial direction of the outer rim; and is

The included angle between every two adjacent supporting spokes is equal, so that the volumes of all the oxygen-enriched gas collecting cavities are equal.

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

the first plate body is provided with an air outlet pipe communicated with the air outlet cavity; and is

The end part of each supporting spoke is connected to the edges of the first plate body and the second plate body, so that each oxygen-enriched gas collecting cavity is communicated with the gas outlet cavity.

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

the support frame is an integral piece formed by adopting an integral injection molding process.

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

the thickness of the outer frame is greater than the thickness of the support spokes to allow the outer periphery of each oxygen-enriched membrane to abut against the inner side of the outer frame.

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

each oxygen-enriched film is fixed on the supporting spokes and the outer frame in a sticking mode.

8. A refrigeration and freezing apparatus, characterized by comprising:

the refrigerator comprises a box body, a storage space and a fresh-keeping space, wherein the storage space is limited in the box body and is internally provided with a controlled atmosphere fresh-keeping space;

the oxygen-enriched membrane assembly of any one of claims 1 to 7, wherein the surrounding space is in communication with the modified atmosphere space; and

and the air inlet end of the air pump is communicated with the air outlet 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 fresh-keeping space.

9. A refrigerator-freezer as claimed in claim 8, further comprising:

the drawer assembly comprises a drawer barrel and a drawer body which is slidably arranged in the drawer barrel, the interior of the drawer body is limited with the atmosphere control preservation space, the top wall of the drawer barrel is internally provided with a containing cavity communicated with the atmosphere control preservation space so as to contain the oxygen-enriched film assembly, and the wall surface between the containing cavity and the atmosphere control preservation space is provided with at least one first vent hole and at least one second vent hole which is separated from the at least one first vent hole so as to respectively communicate the containing cavity and the atmosphere control preservation space at different positions; and

a blower disposed within the receiving cavity to cause gas in the modified atmosphere space to return to the modified atmosphere space through the at least one first vent, the receiving cavity, and the at least one second vent in sequence.