CN106679275A - Cold preservation and refrigerating device - Google Patents

Abstract

The present invention provides a refrigerating and freezing device, which comprises: a box body, in which a storage space is defined; a first airtight assembly, arranged in the storage space, in which a fresh-keeping subspace is defined; an oxygen-enriched membrane assembly, in which In the first airtight module, an oxygen-enriched membrane is arranged inside, the surrounding space of the oxygen-enriched membrane module communicates with the fresh-keeping subspace, and an oxygen-enriched gas collection chamber is formed in the oxygen-enriched membrane module; The gas pipeline is connected to the oxygen-enriched gas collection chamber, and is configured to draw out the gas in the oxygen-enriched gas collection chamber, so as to reduce the oxygen concentration in the fresh-keeping subspace and facilitate food preservation; the second airtight component is also arranged in the storage space, A keep-alive subspace is defined inside, and the keep-alive subspace is connected to the outlet end of the air pump through the exhaust pipeline to receive the gas from the oxygen-enriched gas collection chamber, thereby forming an oxygen concentration higher than 70% in the keep-alive subspace. A gas atmosphere that is conducive to freshness and preservation.

Description

Freezer

technical field

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

Background technique

Food is the source of energy for people's survival and is very important to people. For food storage, the two main aspects are heat preservation and freshness preservation. Generally speaking, temperature has a significant impact on the microbial activity on food and the action of enzymes in food. The decrease in temperature will delay the deterioration of food, and the refrigerator is to keep it constant. A low-temperature refrigeration device is also a civilian product that keeps food or other items in a constant low temperature and cold state.

With the improvement of the quality of life, consumers have higher and higher requirements for the preservation of stored food, especially for the color and taste of food. Therefore, the stored food should also ensure that the color, taste, and freshness of the food remain unchanged as much as possible during the storage period. Therefore, users have also put forward higher requirements for the fresh-keeping technology of refrigerators.

In particular, some consumers have put forward special requirements for the preservation of aquatic products. At present, even in inland areas away from the coast, fresh aquatic products can be seen everywhere. However, fresh aquatic products (such as live fish, live shrimp, live crab, etc.) cannot be stored alive in the prior art, and need to be cooked as soon as possible, which brings great inconvenience to users and affects consumers' enjoyment of fresh aquatic products. .

Contents of the invention

An object of the present invention is to provide a refrigerator-freezer capable of keeping alive storage.

A further object of the present invention is to enable the refrigerating and freezing device to improve the preservation quality of fruits and vegetables.

The present invention provides a refrigerating and freezing device, which comprises: a box body, in which a storage space is defined; a first airtight assembly, arranged in the storage space, in which a fresh-keeping subspace is defined; an oxygen-enriched membrane assembly, in which In the first airtight module, an oxygen-enriched membrane is arranged inside, the surrounding space of the oxygen-enriched membrane module communicates with the fresh-keeping subspace, and an oxygen-enriched gas collection chamber is formed in the oxygen-enriched membrane module; The gas pipeline is connected to the oxygen-enriched gas collection chamber, and is configured to draw out the gas in the oxygen-enriched gas collection chamber, so that the oxygen in the airflow around the oxygen-enriched membrane module is more than the nitrogen in the airflow in the airflow around the oxygen-enriched membrane module The oxygen-enriched gas collection chamber enters the oxygen-enriched gas collection chamber through the oxygen-enriched membrane, thereby reducing the oxygen concentration in the fresh-keeping subspace; The gas pipeline is connected to the gas outlet of the air pump to receive the gas from the oxygen-enriched gas collection chamber, thereby forming a gas atmosphere with an oxygen concentration higher than 70% in the subspace for keeping alive.

Optionally, the above-mentioned refrigerating and freezing device further includes: a first valve, arranged in the air extraction pipeline, configured to control the on-off of the air extraction pipeline; a second valve, arranged in the exhaust pipeline, configured to control the The on-off circuit, and when the air pump is closed, both the first valve and the second valve are closed to ensure the sealing performance of the first sealing assembly and the second sealing assembly.

Optionally, the above-mentioned refrigerating and freezing device further includes: a first gas detection device, arranged in the fresh-keeping subspace, and configured to detect the gas atmosphere index in the fresh-keeping subspace; a second gas detection device, arranged in the fresh-keeping subspace , and configured to detect the gas atmosphere index in the keep-alive subspace; and the air suction pump is further configured to be turned on or off according to the detection results of the first gas detection device and the second gas detection device.

Optionally, the air suction pump is arranged in the compressor compartment of the refrigerating and freezing device, and the air suction pipeline and the exhaust pipeline are respectively embedded in the foam layer of the refrigerating and freezing device.

Optionally, the first airtight assembly includes: a first drawer cylinder with a front opening and disposed in the storage space; a first drawer body slidably installed in the first drawer cylinder, so that the first drawer The front opening of the barrel is operable to be drawn outwards and inserted inwards, and the end plate of the first drawer body forms a sealing structure with the front opening of the first drawer body, and a fresh-keeping subspace is formed in the first drawer body.

Optionally, an accommodating cavity communicating with the fresh-keeping subspace is provided in the top wall of the first drawer cylinder for arranging the oxygen-enriched membrane module; the wall surface between the accommodating cavity and the fresh-keeping subspace of the first drawer cylinder top wall There is at least one first vent hole and at least one second vent hole spaced apart from the at least one first vent hole, so as to communicate with the accommodating cavity and the fresh-keeping subspace at different positions; the refrigerating and freezing device also includes a fan , the blower is placed in the accommodating cavity, so as to promote the formation of an airflow that sequentially passes through the at least one first vent hole, the accommodating cavity and the at least one second vent hole and returns to the fresh-keeping subspace.

Optionally, the oxygen-enriched membrane module further includes a support frame, which has a first surface and a second surface parallel to each other, and is formed to respectively extend on the first surface, extend on the second surface, and pass through the support frame to communicate with the second surface. The multiple airflow channels on the first surface and the second surface together form an oxygen-enriched gas collection chamber; the oxygen-enriched membrane is two layers, which are respectively laid on the first surface and the second surface of the support frame, and the support frame also An air extraction hole communicating with multiple air flow passages is provided for connecting an air extraction pipeline.

Optionally, a fourth communication hole with controlled opening and closing is opened on the cylinder wall of the first drawer cylinder, so that the fresh-keeping subspace communicates with the storage space in a controlled manner.

Optionally, the second sealing assembly includes: a second drawer cylinder with a front opening and disposed in the storage space; a second drawer body slidably mounted on the second drawer cylinder to open the second drawer The front opening of the cylinder is operable to be drawn outwards and inserted inward, and the end plate of the second drawer body forms a sealing structure with the forward opening of the second drawer cylinder, and a living subspace is formed in the second drawer body.

Optionally, a fifth communication hole with controlled opening and closing is opened on the cylinder wall of the second drawer cylinder, so that the keep-alive subspace can be connected with the storage space in a controlled manner.

The refrigerating and freezing device of the present invention creatively proposes to use an oxygen-enriched membrane module to discharge the oxygen in the air in the airtight fresh-keeping subspace, so as to obtain a nitrogen-rich and oxygen-poor gas atmosphere in the fresh-keeping subspace, which is good for food preservation. The nitrogen-rich and oxygen-poor gas atmosphere reduces the oxygen content in the storage space of fruits and vegetables, reduces the intensity of aerobic respiration of fruits and vegetables, and at the same time ensures the basic respiration and prevents anaerobic respiration of fruits and vegetables, so as to achieve the purpose of long-term preservation of fruits and vegetables. At the same time, the oxygen precipitated by the oxygen-enriched membrane module is supplied to the airtight preservation subspace, so that the oxygen concentration in the preservation subspace can reach more than 70% which can maintain the long-term survival of aquatic products. Therefore, the oxygen-enriched membrane module can simultaneously provide a gas atmosphere for the fresh-keeping subspace for fruit and vegetable preservation and the fresh-keeping subspace for fresh aquatic products, thereby enriching the food preservation needs of users.

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

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural diagram of the principle of a refrigerating and freezing device according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a cabinet of a refrigerating and freezing device according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of another perspective of the structure shown in Fig. 2;

Fig. 4 is a schematic partial structural view of a refrigerator-freezer according to an embodiment of the present invention;

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

Figure 6 is an exploded view of an oxygen-enriched membrane assembly in a refrigerating and freezing device according to an embodiment of the present invention;

Figure 7 is a schematic structural block diagram of a refrigerator-freezer according to an embodiment of the present invention; and

Fig. 8 is a schematic diagram of pipeline connections of a refrigerating and freezing device according to an embodiment of the present invention.

detailed description

The refrigerating and freezing device of the embodiment of the present invention adopts the oxygen-enriched membrane module to simultaneously provide gas atmosphere for the fresh-keeping subspace for keeping fruits and vegetables fresh and the fresh-keeping subspace for keeping fresh aquatic products alive. Among them, the working principle of the oxygen-enriched membrane module is to make use of the different permeation rates of the various components in the air when they pass through the oxygen-enriched membrane. Driven by the pressure difference, the oxygen in the air is preferentially passed through the oxygen-enriched membrane. Membranes are generally used to prepare oxygen for applications in medical, fermentation, combustion and other fields. In the embodiment of the present invention, the refrigerating and freezing device uses the oxygen-enriched membrane to discharge oxygen, so that the oxygen concentration in the fresh-keeping subspace is reduced, and an atmosphere conducive to the preservation of fruits and vegetables is realized. At the same time, the discharged oxygen is used to realize the gas that is beneficial to fresh food preservation atmosphere.

Those skilled in the art all know that normal air composition includes (by volume percentage, hereinafter the same): about 78% nitrogen, about 21% oxygen, about 0.939% rare gas (helium, neon, argon, krypton, xenon, radon), 0.031% carbon dioxide, and 0.03% other gases and impurities (for example, ozone, nitrogen monoxide, nitrogen dioxide, water vapor, etc. In the field of controlled atmosphere preservation, it is usually used to fill the closed space with nitrogen-enriched gas. The mode that reduces oxygen content obtains the fresh-keeping gas atmosphere of rich nitrogen and poor oxygen. Those skilled in the art all should know that nitrogen-rich gas refers to the gas whose nitrogen content exceeds the nitrogen content in the above-mentioned normal air, such as wherein the nitrogen content can be 95% ~99%, or even higher; while the nitrogen-rich and oxygen-deficient fresh-keeping gas atmosphere refers to the gas atmosphere in which the nitrogen content exceeds the nitrogen content in the above-mentioned normal air, and the oxygen content is lower than the oxygen content in the above-mentioned normal air.

The living gas atmosphere refers to the gas environment with an oxygen content of more than 75%. Through actual tests, in a gas environment with an oxygen content of more than 75%, the survival time of fresh aquatic products can be greatly extended.

Although the modified atmosphere preservation technology also exists in the prior art, its history can be traced back to 1821, when a German biologist discovered that fruits and vegetables can reduce the start of metabolism when the oxygen level is low. But until now, due to the large size and high cost of nitrogen-generating equipment traditionally used for controlled atmosphere preservation, this technology has basically been limited to use in various large-scale professional storages (storage capacity is generally at least 30 tons or more). . Therefore generally still adopt vacuum fresh-keeping technology in the small-sized refrigerating and freezing equipments such as refrigerator in the prior art.

In this embodiment, the air-conditioning system is economically miniaturized and quiet through the above-mentioned oxygen-enriched membrane module, so that it is suitable for small-scale refrigeration and freezing equipment such as refrigerators. Keep alive the gas atmosphere.

Fig. 1 is a schematic diagram of the principle structure of a refrigerating and freezing device according to an embodiment of the present invention, Fig. 2 is a schematic structural diagram of a cabinet 20 of a refrigerating and freezing device according to an embodiment of the present invention, and Fig. 3 is another schematic diagram of the structure shown in Fig. 2 Schematic structure diagram of a perspective. As shown in the figure, the refrigerating and freezing device of this embodiment may include a box body 20, a door body (not shown in the figure), an oxygen-enriched membrane module 30, an air pump 40 and a refrigeration system (not shown in the figure). A storage space is defined in the box body 20 of the refrigerating and freezing device, and the storage space can be configured as a refrigerating room 27, a freezing room 25, a temperature-changing room 26, etc. according to the cooling temperature. The refrigerating and freezing device may be a refrigerator having at least a refrigerating chamber 27 and a freezing chamber 25 . The refrigeration system can be a common compression refrigeration system or a semiconductor refrigeration system, which provides cold energy to the storage compartment through, for example, direct cooling and/or air cooling, so that the storage compartment has a desired preservation temperature. In some embodiments, the storage temperature of the refrigerator compartment 27 may be 2-9°C, or 4-7°C; the storage temperature of the freezer compartment 25 may be -22--14°C, or -20-16°C. ℃. The freezer compartment 25 is disposed below the refrigerator compartment 27 , and the temperature-changing compartment 26 is disposed between the freezer compartment 25 and the refrigerator compartment 27 . The temperature range in the freezer compartment 25 is generally -14°C to -22°C. The temperature-changing room 26 can be adjusted according to demand to store suitable food.

A first sealing component 71 and a second sealing component 72 may be arranged in the storage space. A fresh-keeping subspace 271 is defined in the first airtight assembly 71 , and a fresh-keeping subspace 272 is defined in the second airtight assembly 72 . The first airtight assembly 71 and the second airtight assembly 72 may be arranged in any of the above-mentioned compartments, they may be arranged in the same chamber at the same time, or they may be arranged in different compartments. When the first airtight assembly 71 and the second airtight assembly 72 are arranged in the same room, they can be arranged up and down, or arranged side by side horizontally. A first sealing component 71 and a second sealing component 72 are arranged. For example, the first airtight assembly 71 and the second airtight assembly 72 can be arranged vertically in the refrigerating chamber 27 , and for example, the first airtight assembly can be arranged in the refrigerating chamber 27 , and the second airtight assembly can be arranged in the temperature-changing chamber 26 .

The door body is pivotally mounted on the box body 20 and is configured to open or close the storage space defined by the box body 20 . In order to ensure the airtightness of the fresh-keeping subspace 271 and the fresh-keeping subspace 272, a small door can also be provided inside the door to open or close the fresh-keeping subspace 271 and the fresh-keeping subspace 272, thereby forming a double-layer door structure.

The refrigeration system can be a refrigeration cycle system composed of a compressor, a condenser, a throttling device, and an evaporator. The compressor is installed in the compressor compartment 24 . The evaporator is configured to directly or indirectly provide cold energy into the storage space. For example, when the refrigerating and freezing device is a domestic compression direct-cooling refrigerator, the evaporator can be arranged outside or inside the rear wall of the inner container 21 . When the refrigerating and freezing device is a household compressed air-cooled refrigerator, there is also an evaporator room in the box 20, the evaporator room communicates with the storage space through the air system, and the evaporator room is provided with an evaporator, and a fan is provided at the outlet. , to circulate cooling to the storage space. Since this type of refrigeration system itself is well-known and easy to implement by those skilled in the art, in order not to obscure and obscure the invention point of the present application, the refrigeration system itself will not be described in detail below.

In some embodiments, the refrigerating and freezing device may also utilize a drawer structure to form the above-mentioned first sealing component 71 and the second sealing component 72 .

Taking the first sealing assembly 71 as an example, the drawer structure forming the fresh-keeping subspace 271 is introduced. Fig. 4 is a schematic partial structural view of a refrigerator-freezer according to an embodiment of the present invention, and Fig. 5 is a schematic exploded view of the structure shown in Fig. 4, the drawer forming the first sealing assembly 71 may have a first drawer cylinder 22 and the first drawer body 23. Thus, the fresh-keeping subspace 271 is formed by utilizing the drawer-type storage compartment. The first drawer cylinder 22 has a front opening and is arranged in the storage space (such as the lower part of the refrigerator compartment 27). The first drawer body 23 is slidably installed in the first drawer cylinder 22. The first drawer body 23 The front end of the drawer is provided with an end plate, which cooperates with the first drawer cylinder 22 to close the opening of the fresh-keeping subspace 271 . A specific way is that the first drawer body 23 can be operatively drawn outwards and pushed inwards from the front opening of the first drawer cylinder 22 . The end plate seals the opening of the fresh-keeping subspace 271 through the sealing structure.

In some embodiments of the present invention, a sealing portion can be formed between the opening of the first drawer cylinder 22 and the end plate of the first drawer body 23 , and the sealing portion can properly leak air to achieve air pressure balance. In some other embodiments, air pressure balance can be ensured by setting millimeter-level micro-holes or one-way valves on the first drawer cylinder 22 .

The drawers forming the second enclosure assembly 72 may adopt a similar structure. For example, the second sealing assembly 72 may include: a second drawer cylinder and a second drawer body. The second drawer cylinder has a front opening and is arranged in the storage space; the second drawer body is slidably installed in the second drawer cylinder so as to be operatively outward from the front opening of the second drawer cylinder Pull out and insert inward, and the end plate of the second drawer body forms a sealing structure with the forward opening of the second drawer cylinder, and a keep-alive subspace 272 is formed in the second drawer body. The difference is that no structure for placing the oxygen-enriched membrane module 30 is required to define the top of the keep-alive subspace 272 .

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

In some embodiments of the present invention, in order to promote the gas flow in the fresh-keeping subspace 271 and the containing chamber 31, a fan 60 may also be provided in the containing chamber 31 of the first sealing assembly 71, and the fan 60 is used to form a A vent hole 222, accommodating chamber 31 and at least one second vent hole 223 return the airflow of the fresh-keeping subspace, thereby impelling the gas in the fresh-keeping subspace 271 to enter the accommodating chamber 31 through the first communication hole 222, and make the accommodating chamber 31 The gas inside enters the fresh-keeping subspace 271 through the second communication hole 223 , thereby forming a gas flow passing through the oxygen-enriched membrane module 30 .

The fan 60 placed in the storage chamber 31 may be above the at least one first communication hole 222, which promotes the gas in the fresh-keeping subspace 271 to enter the storage chamber 31 through the at least one first communication hole 222, and makes the gas in the storage chamber 31 Enter the fresh-keeping subspace 271 through at least one second communication hole 223 to absorb the oxygen released by the oxygen-enriched membrane module 30 from the gas passing therethrough.

The fan 60 is preferably a centrifugal fan, and can be arranged at the first communication hole 222 in the gas collection chamber 31 . That is to say, the centrifugal fan 60 is located above at least one first communication hole 222 , and the air inlet is facing the first communication hole 222 . The air outlet of the centrifugal fan 60 may face the oxygen-enriched membrane module 30 . At least one second communication hole 223 may be located below the oxygen-enriched membrane module 30 .

The top wall of the first drawer cylinder 22 includes a lower plate portion 224 and a cover plate portion 225, which jointly define the accommodating cavity 31. For example, the upper surface of the lower plate portion 224 can form a recessed groove, and the cover plate portion 225 is covered in the recessed groove. to form the accommodation cavity 31 . At least one first communicating hole 222 is disposed at the front of the top wall, and at least one second communicating hole 223 is disposed at the rear of the top wall. The centrifugal fan 60 is arranged at the front of the containing chamber 31 , and the oxygen-enriched membrane module 30 is arranged at the rear of the containing chamber 31 .

The oxygen-enriched membrane assembly 30 has an oxygen-enriched membrane 36 and an oxygen-enriched gas collection chamber, and one side of the oxygen-enriched membrane 36 faces the oxygen-enriched gas collection chamber, so that the pressure in the oxygen-enriched gas collection chamber is lower than that of the other side of the oxygen-enriched membrane 36 When the pressure is high, the oxygen in the air on the other side of the oxygen-enriched membrane 36 passes through the oxygen-enriched membrane 36 and enters the oxygen-enriched gas collection chamber. Specifically, the oxygen-enriched membrane module 30 can be in contact with the circulation channel (that is, the housing chamber 31 ) connected to the fresh-keeping subspace 271, so that when the pressure in the oxygen-rich gas collection chamber is lower than the pressure in the fresh-keeping subspace 271, the housing The oxygen in the gas in the chamber 31 (from the fresh-keeping subspace 271 ) is more permeated through the oxygen-enriched membrane and enters the oxygen-enriched gas collection chamber than the nitrogen in the gas flow around the oxygen-enriched membrane module 30, that is, the blower 60 is formed. Oxygen in the gas stream permeates the oxygen-enriched membrane more than nitrogen into the oxygen-enriched gas collection chamber.

Fig. 6 is an exploded view of an oxygen-enriched membrane module 30 in a refrigeration and freezing device according to an embodiment of the present invention. The support frame 32 has a first surface and a second surface parallel to each other, and is formed with a plurality of airflow passages respectively extending on the first surface, extending on the second surface, and passing through the support frame to communicate with the first surface and the second surface , a plurality of gas flow channels jointly form an oxygen-enriched gas collection chamber.

The oxygen-enriched membrane 36 can be two layers, respectively laid on both sides of the supporting frame 32, so as to seal the oxygen-enriched gas collection chamber, and each layer of the oxygen-enriched membrane 36 can be formed by stacking one or more oxygen-enriched membranes. Gas passing through the oxygen-enriched film 36 is a complex process, and its mechanism is generally that gas molecules are first adsorbed to the surface of the oxygen-enriched film 36 for dissolution, and then dissolved in the oxygen-enriched film 36 in the oxygen-enriched film by the difference in diffusion coefficient. Realize gas separation. When the gas is affected by the pressure difference between the two sides of the oxygen-enriched membrane 36, the oxygen with a fast permeation rate is enriched on the permeation side of the oxygen-enriched membrane 36, thereby converging in the oxygen-enriched gas collection chamber.

The support frame 32 can include a frame, and structures such as ribs and/or flat plates arranged in the frame can form airflow passages between the ribs, between the ribs and the flat plates, and can be formed on the surface of the ribs or the flat plate. Grooves are opened to form airflow passages. The ribs and/or flat plates can improve the structural strength and the like of the oxygen-enriched membrane module 30 . That is to say, the support frame 32 has a first surface and a second surface parallel to each other, and a plurality of airflow channels communicating with the first surface and the second surface are formed inside. Two oxygen-enriched membranes 36 are laid on the first surface and the second surface of the support frame 32 respectively, so as to form an oxygen-enriched gas collection chamber by closing together with the multiple airflow channels of the support frame 32 .

In some embodiments of the present invention, the support frame 32 includes air extraction holes 33 communicated with the aforementioned plurality of gas flow channels, and are provided on the frame 32 to allow the oxygen in the oxygen-enriched gas collection chamber to be output. The suction hole 33 communicates with the suction device 41 . The oxygen-enriched film 36 is first installed on the frame through the double-sided adhesive 34 , and then sealed with the sealant 35 .

In some embodiments, the aforementioned plurality of airflow passages formed inside the support frame 32 may be one or more cavities communicated with the air suction hole 33 . In some embodiments, the aforementioned plurality of airflow channels formed inside the support frame 32 may have a grid structure.

Specifically, the support frame 32 may include a frame, ribs and/or flat plates arranged in the frame and other structures, airflow passages may be formed between the ribs, between the ribs and the flat plates, etc., on the surface of the ribs, on the surface of the flat plate Grooves can be opened on the top to form airflow channels. The ribs and/or flat plates can improve the structural strength and the like of the oxygen-enriched membrane module 30 .

For example, the support frame 32 has a first surface and a second surface parallel to each other, and the support frame 32 is formed to respectively extend on the first surface, extend on the second surface, and penetrate the support frame 32 to communicate with the first surface and the second surface. multiple airflow channels. That is to say, the plurality of airflow passages include a plurality of first airflow passages extending on the first surface, a plurality of second airflow passages extending on the second surface, and passing through the support frame 32 to communicate with the first surface and the second airflow passage. A plurality of third airflow passages on the two surfaces. Or it can also be understood that the support frame 32 is formed with a plurality of first airflow channels extending on the first surface and a plurality of second airflow channels extending on the second surface, and the distance between the first airflow channels and the second airflow channels are communicated through the third airflow channel. All gas flow channels together form an oxygen-enriched gas collection chamber.

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

The support frame 32 is formed with an air extraction hole 33 communicating with the air flow channel. The air extraction hole 33 communicates with the oxygen-enriched gas collection chamber and is used to connect the inlet of the air pump 40, thereby allowing the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be output. When the suction pump 40 is running, the oxygen-enriched gas collection chamber 38 is in a negative pressure state, and the oxygen in the air outside the oxygen-enriched membrane module 30 will continue to pass through the oxygen-enriched membrane 36 and enter the oxygen-enriched gas collection chamber. The support frame 32 may be generally a rectangular frame as a whole.

In some embodiments, the supporting frame 32 may include: a frame, a plurality of first ribs and a plurality of second ribs. The plurality of first ribs are longitudinally spaced inside the frame and extend transversely, and one side surface of the plurality of first ribs forms a first surface. A plurality of second ribs are arranged laterally at intervals on the other side surface of the plurality of first ribs and extend longitudinally, and one side surface of the plurality of second ribs away from the first rib forms a second surface . That is to say, the aforementioned plurality of second ribs is disposed on one side surface of the aforementioned plurality of first ribs. The opposite surfaces of the plurality of first ribs and the plurality of second ribs respectively form a first surface and a second surface; that is, the opposite surfaces of the plurality of first ribs and the plurality of second ribs A first surface is formed; the surfaces opposite to the plurality of second ribs and the plurality of first ribs form the second surface. The gaps between adjacent first ribs, between adjacent second ribs, and between adjacent first ribs and second ribs form the aforementioned plurality of airflow channels. Wherein, the gap between two adjacent first ribs forms a first airflow channel extending on the first surface, and the gap between two adjacent second ribs forms a first airflow channel extending on the second surface. Two airflow passages, the gap between adjacent first ribs and second ribs forms a third airflow passage through the support frame 32 and communicates with the first surface and the second surface. That is, the intersecting structure formed by all the first ribs and all the second ribs forms the aforementioned plurality of airflow channels.

The support frame 32 is provided with a plurality of first ribs longitudinally spaced and transversely extending inside its frame and a plurality of second ribs transversely spaced and longitudinally extending on one side surface of the aforementioned plurality of first ribs. board, so that on the one hand, the continuity of the airflow channel is ensured; on the other hand, the volume of the supporting frame is greatly reduced, and the strength of the supporting frame 32 is greatly enhanced. In addition, the above-mentioned structure of the support frame 32 ensures that the oxygen-enriched membrane 36 can obtain sufficient support, and can always maintain good flatness even when the negative pressure inside the oxygen-enriched gas collection chamber is relatively large, ensuring that the oxygen-enriched membrane service life of the component 30.

The air suction holes 33 can be arranged on one lateral side of the frame in the longitudinal middle of the frame. Such setting is equivalent to drawing air from the middle of the oxygen-enriched membrane module 30 , which is conducive to the uniform ventilation of the oxygen-enriched membrane 36 . The air suction hole 33 can be a stepped hole or a stepped hole, so as to ensure the airtightness of the connection part when it is connected to the air pump 40 through a hose.

The above-mentioned structure of the support frame 32 ensures that the oxygen-enriched membrane 36 can obtain sufficient support, and can always maintain a good flatness even in the case of a large negative pressure inside the oxygen-enriched gas collection chamber, ensuring that the oxygen-enriched membrane module 30 service life.

The intake end of the air pump 40 is connected to the air suction hole 33 via the air suction pipeline 51 to communicate with the oxygen-enriched gas collection chamber, and is configured to draw out the gas in the oxygen-enriched gas collection chamber to make the oxygen in the fresh-keeping subspace 271 The content is continuously reduced, thereby forming a nitrogen-rich and oxygen-poor gas atmosphere in the fresh-keeping subspace 271 to facilitate food fresh-keeping. The air extraction pump 40 can be arranged in the compressor compartment 24, which can make full use of the space of the compressor compartment 24 and does not occupy other places. Therefore, the extra volume of the refrigerating and freezing device will not be increased, and the structure of the refrigerating and freezing device can be made compact.

In some embodiments of the present invention, the air pump 40 and the compressor can be respectively arranged on both sides of the compressor chamber 24 and spaced apart from each other, so that the distance between the air pump 40 and the compressor is relatively long, reducing noise superposition and waste heat superposition. For example, the air extraction pump 40 may be disposed at one end of the compressor compartment 24 adjacent to the pivoting side of the door body. When the refrigerating and freezing device is a side-by-side refrigerator, the air extraction pump 40 can be arranged at any position of the compressor compartment 24 . In other embodiments of the present invention, the air extraction pump 40 may also be disposed adjacent to the compressor, for example, the air extraction pump 40 is disposed at one end of the compressor compartment 24 and between the compressor and the side wall of the compressor compartment 24 .

In some embodiments of the present invention, the air suction pump 40 can be installed in the sealed box, and the sealed box can be installed in the compressor compartment 24 through the installation bottom plate. The airtight box can largely block the noise and/or waste heat of the suction pump 40 from spreading outward.

The oxygen extracted by the air pump 40 is used to supply the keep-alive subspace 272 of the second sealing component 72 . The preservation subspace 272 is connected to the outlet end of the air pump 40 via the exhaust pipeline 52 to receive the gas from the oxygen-enriched gas collection chamber, so that the oxygen concentration in the preservation subspace 272 is higher than 70%, which is beneficial to freshness preservation. gas atmosphere.

Air extraction pipeline 51 and exhaust pipeline 52 can be embedded in the foam layer of described refrigerating and freezing device respectively, and under the situation that refrigerating and freezing device is an air-cooled refrigerator, degassing pipeline 51 and exhaust pipeline 52 can also be provided with in the air duct.

Fig. 7 is a schematic structural block diagram of a refrigerating and freezing device according to an embodiment of the present invention, and Fig. 8 is a schematic diagram of pipeline connections of the refrigerating and freezing device according to an embodiment of the present invention. After the air pump 40 runs, the oxygen in the fresh-keeping subspace 271 is discharged into the fresh-keeping subspace 272 through the oxygen-enriched membrane module 30 through the air pump 40, while the fresh-keeping subspace 271 forms a fresh-keeping gas atmosphere rich in nitrogen and deficient in oxygen. The keep-alive subspace 272 forms a keep-alive gas atmosphere. It should be noted that the start and stop of the air pump 40 is generally synchronized with the start and stop of the fan 60, that is, when the air pump 40 starts to form a negative pressure in the oxygen-enriched gas collection chamber, the fan 60 simultaneously makes the gas in the fresh-keeping subspace 271 An air flow is formed in the accommodation chamber 31 .

In addition, in order to make the process of forming the gas atmosphere controllable and ensure the sealing of the first sealing assembly 71 and the second sealing assembly 72 , the refrigerating and freezing device is further provided with a first valve 151 and a second valve 152 . Wherein the first valve 151 is arranged in the exhaust pipeline 51 and is configured to control the on-off of the exhaust pipeline 51 ; the second valve 152 is arranged in the exhaust pipeline 52 and is configured to control the on-off of the exhaust pipeline 52 .

When the suction pump 40 is turned off, both the first valve 151 and the second valve 152 are closed to ensure the sealing performance of the first sealing component 71 and the second sealing component 72 . After the air pump 40 is started, the first valve 151 and the second valve 152 are correspondingly opened to allow the gas to flow accordingly.

The refrigerating and freezing device of this embodiment may also be provided with: a first gas detection device 281 and a second gas detection device 282 . Wherein the first gas detection device 281 is arranged in the fresh-keeping subspace 271 and configured to detect the gas atmosphere index in the fresh-keeping subspace 271 . The second gas detection device 282 is arranged in the keep-alive subspace 272, and is configured to detect the gas atmosphere index in the keep-alive subspace 272; 282 detection results are turned on or off.

The aforementioned gas atmosphere indicators mainly include oxygen concentration, and the first gas detection device 281 and the second gas detection device 282 may respectively include: an oxygen concentration sensor. The oxygen concentration sensor can be selected from various types of oxygen concentration sensors such as diaphragm type galvanic battery type, electrochemical, catalytic combustion, and constant potential electrolysis. In some optional embodiments, the first gas detection device 281 and the second gas detection device 281 The detection device 282 may also use a gas analyzer for measuring the gas content therein, including oxygen content, nitrogen content, carbon dioxide content and the like.

The control process of the air pump 40 can be: collect the oxygen concentration detected by the first gas detection device 281 and the second gas detection device 282, and the oxygen concentration in the fresh-keeping subspace 271 exceeds the preset fresh-keeping range or the oxygen concentration in the fresh-keeping subspace 272 When the concentration is lower than the preset range for keeping alive, the air pump 40 starts to exhaust the oxygen in the fresh keeping subspace 271 to the keeping alive subspace 272 . And when the oxygen concentration in the fresh-keeping subspace 271 is maintained within the fresh-keeping range or the oxygen concentration in the fresh-keeping subspace 272 exceeds the preset fresh-keeping range, the air pump 40 is turned off.

Considering that it is possible that the oxygen concentration in the fresh-keeping subspace 271 has met the fresh-keeping requirements, but the oxygen concentration in the fresh-keeping subspace 272 has not met the keeping-alive requirements, or the oxygen concentration in the keeping-alive subspace 272 has met the keeping-alive requirements However, the oxygen concentration in the fresh-keeping subspace 271 cannot meet the fresh-keeping requirements and the like. The first sealing component 71 (for example, on the cylinder wall of the first drawer cylinder) is also provided with a controlled opening and closing fourth communication hole 291, so that the fresh-keeping subspace 271 communicates with the storage space in a controlled manner. The first sealing assembly 71 (for example, on the cylinder wall of the second drawer cylinder) can also have a fifth communication hole 292 with controlled opening and closing on the cylinder wall of the second drawer cylinder, so that the keep-alive subspace 272 is controlled connected with the storage space.

In the case where the oxygen concentration in the fresh-keeping subspace 271 has met the fresh-keeping requirements, but the oxygen concentration in the fresh-keeping subspace 272 has not met the requirements for keeping alive, the air pump 40 may not be able to continue extracting enough oxygen from the fresh-keeping subspace 271 at this time. Provided to the freshness-keeping subspace 272 , at this time, the fourth communication hole 291 is opened to allow the gas of stored air to enter the freshness-keeping subspace 271 to prepare more oxygen for the oxygen-enriched membrane module 30 . In a normal state, the fourth communication hole 291 remains closed.

The oxygen concentration in the fresh-keeping subspace 272 has met the fresh-keeping requirements, but the oxygen concentration in the fresh-keeping subspace 271 has not yet met the fresh-keeping requirements. The subspace 272 provides, at this time, the fifth communication hole 292 can be opened to allow part of the oxygen to be discharged into the storage space. In a normal state, the fifth communication hole 292 remains closed.

In addition, the specific range of oxygen concentration in the gas atmosphere rich in nitrogen and deficient in oxygen to keep food fresh can be determined according to the type of food placed in the fresh-keeping subspace 271 . Through the research on the fresh-keeping characteristics of food, the inventor found that oxygen is closely related to the oxidation and respiration of fruits and vegetables. It is not that the lower the oxygen concentration, the more conducive to the preservation of fruits and vegetables. Too low oxygen content will also lead to anaerobic food. Breathing can also lead to spoilage of food. Therefore, each fruit and vegetable may have an optimal oxygen concentration range. Therefore, after the user places fruits and vegetables in the fresh-keeping subspace 271, the type of fruit and vegetable can be set or the type of fruit and vegetable can be automatically identified by the refrigeration device, thereby correspondingly determining that the fresh-keeping subspace 271 needs to be maintained. oxygen concentration range.

The refrigerating and freezing device of this embodiment creatively proposes to use an oxygen-enriched membrane module to discharge the oxygen in the air in the airtight fresh-keeping subspace 271 to the fresh-keeping subspace 272, thereby obtaining nitrogen-rich and oxygen-poor oxygen in the fresh-keeping subspace 271. A gas atmosphere conducive to food preservation. The nitrogen-rich and oxygen-poor gas atmosphere reduces the oxygen content in the storage space of fruits and vegetables, reduces the intensity of aerobic respiration of fruits and vegetables, and at the same time ensures the basic respiration and prevents anaerobic respiration of fruits and vegetables, so as to achieve the purpose of long-term preservation of fruits and vegetables. At the same time, the oxygen released by the oxygen-enriched membrane module 30 is supplied to the airtight preservation subspace 272, so that the oxygen concentration in the preservation subspace 272 reaches more than 70% which can maintain the long-term survival of aquatic products. Therefore, the oxygen-enriched membrane module 30 can simultaneously provide a gas atmosphere for the fresh-keeping subspace 271 for keeping fruits and vegetables fresh and the fresh-keeping subspace 272 for keeping fresh aquatic products alive, thereby enriching the food preservation needs of users.

Further, the refrigeration and freezing device of the present invention can also maintain the gas atmosphere of the fresh-keeping subspace 271 and the fresh-keeping subspace 272 by adjusting the working states of the air suction pump 40 , the exhaust pipeline 52 and the air suction pipeline 51 .

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. a kind of refrigerating device, including：

Casing, in it storage space is defined；

First closed component, is arranged in the storage space, and fresh-keeping subspace is defined in it；

Oxygen-enriched membrane component, is arranged in the described first closed component, oxygen permeable membrane is provided with it, around the oxygen-enriched membrane component Space connects with the fresh-keeping subspace, and oxygen rich gas collecting chamber is formed with the oxygen-enriched membrane component；

Air pump, its inlet end is communicated to the oxygen rich gas collecting chamber via exhaust pipe, and is configured to the oxygen rich air The gas of body collecting chamber is outwards extracted out so that the oxygen in the oxygen-enriched membrane component surrounding space air-flow is relative to the oxygen permeable membrane Nitrogen in component surrounding space air-flow more enters the oxygen rich gas collecting chamber through the oxygen permeable membrane, so as to reduce State the oxygen concentration of fresh-keeping subspace；

Second closed component, is also disposed in the storage space, and keep-alive subspace, the keep-alive subspace Jing are defined in it The outlet side of the air pump is communicated to by gas exhaust piping, with receive from the oxygen rich gas collecting chamber gas, so as to The keep-alive subspace forms oxygen concentration higher than 70% beneficial to the atmosphere of fresh keep-alive.

2. refrigerating device according to claim 1, also includes：

First valve, in being arranged at the exhaust pipe, is configured to control the break-make of the exhaust pipe；

Second valve, in being arranged at the gas exhaust piping, is configured to control the break-make of the gas exhaust piping, and in the air pump During closing, first valve and second valve are turned off, to ensure the described first closed component and the second closed component Sealing.

3. refrigerating device according to claim 1, also includes：

First gas detection means, is arranged in the fresh-keeping subspace, and is configured to detect the gas in the fresh-keeping subspace Body atmosphere index；

Second gas detection means, is arranged in the keep-alive subspace, and is configured to detect the gas in the keep-alive subspace Body atmosphere index；And

The air pump is configured to be tied according to the detection of the first gas detection means and the second gas detection means Fruit is turned on and off.

4. refrigerating device according to claim 1, wherein

The air pump is arranged in the compressor room of the refrigerating device, and the exhaust pipe and the exhaustor Road is embedded in respectively in the foaming layer of the refrigerating device.

5. refrigerating device according to claim 1, wherein the first closed component includes：

First drawer cylinder, with front to opening, and is arranged in the storage space；

First drawer body, is slidably mounted in the first drawer cylinder, with from the forward direction of the first drawer cylinder Opening is operationally outwards extracted out and is inwardly inserted into, and the end plate of first drawer body and the first drawer cylinder Forward direction opening is formed and formed in sealing structure, first drawer body fresh-keeping subspace.

6. refrigerating device according to claim 5, wherein

The accommodating chamber connected with the fresh-keeping subspace is provided with the roof of the first drawer cylinder, for arranging the richness Oxygen membrane module；Offer in wall between the accommodating chamber of the first drawer cylinder roof and the fresh-keeping subspace to Few first passage and at least one second passages opened up with the first passage interval described at least one, with respectively The accommodating chamber and the fresh-keeping subspace are connected in diverse location；

The refrigerating device also includes blower fan, and the blower fan is placed in the receiving intracavity, to promote to be formed successively via institute State at least one first passages, the accommodating chamber and at least one second passage and return to the fresh-keeping subspace Air-flow.

7. refrigerating device according to claim 6, wherein,

The oxygen-enriched membrane component also includes support frame, and it has the first surface and second surface being parallel to each other, and is formed with Extend on the first surface respectively, extend on the second surface, and it is described to connect through the support frame Multiple gas channels of first surface and the second surface, the plurality of gas channel is collectively forming oxygen rich gas collecting chamber；

The oxygen permeable membrane be two-layer, be laid on respectively on the first surface and second surface of the support frame, with described The plurality of gas channel of support frame frame is limited and forms the oxygen rich gas collecting chamber jointly, and the support frame also sets up There is the aspirating hole connected with the plurality of gas channel, for connecting the exhaust pipe.

8. refrigerating device according to claim 1, wherein

The 4th intercommunicating pore of controlled opening and closing is also provided with the barrel of the first drawer cylinder so that the fresh-keeping subspace controllably with The storage space connection.

9. refrigerating device according to claim 1, wherein the second closed component includes：

Second drawer cylinder, with front to opening, and is arranged in the storage space；

Second drawer body, is slidably mounted in the second drawer cylinder, with from the forward direction of the second drawer cylinder Opening is operationally outwards extracted out and is inwardly inserted into, and the end plate of second drawer body and the second drawer cylinder Forward direction opening is formed and formed in sealing structure, second drawer body keep-alive subspace.

10. refrigerating device according to claim 1, wherein

The 5th intercommunicating pore of controlled opening and closing is also provided with the barrel of the second drawer cylinder so that the keep-alive subspace controllably with The storage space.