CN206362048U - Refrigerator - Google Patents

Abstract

The utility model provides a refrigerator. Wherein the refrigerator includes: a box body, which defines a storage space and a compressor compartment inside, a storage container is arranged in the storage space, and a fresh-keeping space is defined inside the storage container; Membrane and an oxygen-enriched gas collection chamber, and be configured so that the oxygen in the gas flow around the air-conditioning membrane module is more permeated into the oxygen-enriched gas collection chamber through the air-conditioning membrane relative to the nitrogen in the space around the air-conditioning membrane module; The gas in the oxygen-enriched gas collection chamber is pumped out of the fresh-keeping space, so that the ratio of the nitrogen content to the oxygen content in the fresh-keeping space is greater than 78/21. The refrigerator of the present utility model can realize a nitrogen-rich and oxygen-poor gas atmosphere in the fresh-keeping space, which is beneficial to fresh-keeping of food materials, can improve the storage effect of food materials, and enhance user experience.

Description

refrigerator

technical field

The utility model relates to the field of article storage, in particular to a refrigerator.

Background technique

With the development of society and the improvement of people's living standards, and the faster and faster pace of people's life, people often buy a large number of items and place them in various refrigerators, but for leafy vegetables and fruits and vegetables, the storage of refrigerators The low temperature in the space will not only wrinkle and stain the skin of these foods, but also affect their original taste and nutrition.

In the fresh-keeping technology of the refrigerator, oxygen is closely related to the oxidation and respiration of the food in the refrigerator. The slower the respiration of the food, the lower the oxidation of the food and the longer the preservation time. Reducing the oxygen content in the air has an obvious effect on food preservation. At present, in order to reduce the oxygen content in the refrigerator, in the prior art, vacuum preservation or an additional deoxygenation device is usually used for hypoxic preservation. However, the operation of vacuum preservation is usually cumbersome and inconvenient to use; and the deoxygenation device usually uses electrolytes to remove oxygen, and the device is relatively complicated and the deoxygenation effect is not obvious.

Modified atmosphere preservation technology generally refers to the technology of prolonging the life of food storage by adjusting the gas atmosphere (gas composition ratio or gas pressure) in the closed space where the storage is located. The basic principle is: in a certain closed space A gas atmosphere different from normal air components is obtained through various adjustment methods to inhibit the physiological and biochemical processes and microbial activities that cause the storage (usually food) to deteriorate. In particular, in this application, the discussed modified atmosphere fresh-keeping will be specifically aimed at the modified-atmosphere fresh-keeping technology that adjusts the ratio of gas components.

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 (eg, ozone, nitric oxide, nitrogen dioxide, water vapor, etc.). In the field of controlled atmosphere fresh-keeping, it is usually used to fill the closed space with nitrogen-rich gas to reduce the oxygen content to obtain a nitrogen-rich and oxygen-poor fresh-keeping gas atmosphere. Here, those skilled in the art know that nitrogen-enriched gas refers to a gas whose nitrogen content exceeds the nitrogen content in the above-mentioned normal air, for example, the nitrogen content may be 95% to 99%, or even higher; The gas atmosphere refers to a 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 above-mentioned oxygen content in the normal air.

However, the traditional nitrogen-generating equipment used for controlled atmosphere fresh-keeping is bulky and expensive, so that this technology is basically limited to use in various large-scale professional storage warehouses (the storage capacity is generally at least 30 tons), and it is not suitable for family or individual users.

Utility model content

One purpose of the utility model is to provide a simple and convenient modified atmosphere fresh-keeping refrigerator.

A further purpose of the utility model is to improve the storage effect of items in the refrigerator.

In particular, the utility model provides a refrigerator, which includes: a box body, a storage space and a compressor compartment are defined inside, a storage container is arranged in the storage space, and a fresh-keeping space is defined inside the storage container The door body is arranged on the front surface of the box body for closing the storage space; the air-conditioning membrane assembly is installed in the storage container and its surrounding space communicates with the fresh-keeping space, and the air-conditioning membrane assembly has at least one air-conditioning membrane and one The oxygen-enriched gas collection chamber is configured so that the oxygen in the gas flow around the air-conditioning membrane module enters the oxygen-enriched gas collection chamber through the air-conditioning membrane more than the nitrogen in it; and the air suction pump assembly is arranged in the compressor chamber Inside, the air extraction pump assembly includes an air extraction pump, and the inlet end of the air extraction pump is controlled to communicate with the oxygen-enriched gas collection chamber through the pipeline and the pipeline switching mechanism, so as to exhaust the gas in the oxygen-enriched gas collection chamber to the outside of the fresh-keeping space, The ratio of the nitrogen content to the oxygen content in the fresh-keeping space is greater than 78/21, wherein the sum of the nitrogen content and the oxygen content in the fresh-keeping space is greater than or equal to 83%.

Optionally, the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than or equal to 4.26 and less than or equal to 49.

Optionally, the modified atmosphere membrane module is an oxygen-enriched membrane module, and at least one modified atmosphere membrane is at least one oxygen-enriched membrane.

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 the support frame is formed on the first surface, extends on the second surface, and passes through The support frame is used to communicate with multiple airflow channels on the first surface and the second surface, and the multiple airflow channels together form an oxygen-enriched gas collection chamber, and at least one oxygen-enriched membrane is two planar oxygen-enriched membranes, which are respectively laid on the sides of the support frame. on the first surface and the second surface.

Optionally, the storage container is a sealed drawer, and the fresh-keeping space is defined by the sealed drawer.

Optionally, the box body includes: an inner bag defining a storage space inside.

Optionally, the airtight drawer includes: a drawer cylinder with a front opening, fixed to an inner tank, and a fresh-keeping space is defined therein; and a drawer body, slidably installed in the drawer cylinder, so that The drawer barrel is operable to be withdrawn outwardly and inserted inwardly toward the opening.

Optionally, a plurality of air pressure balance holes are opened on the drawer cylinder to communicate with the storage space and the fresh-keeping space.

Optionally, an accommodating cavity communicating with the fresh-keeping space is provided in the top wall of the drawer cylinder to accommodate the air-modified membrane assembly, and at least A first air hole and at least one second air hole spaced apart from at least one first air hole are used to communicate with the accommodating chamber and the fresh-keeping space at different positions; The gas in turn returns to the fresh-keeping space through at least one first vent hole, the accommodating cavity and at least one second vent hole.

Optionally, the air pump assembly further includes: an installation base plate, installed on the bottom surface of the compressor compartment through a plurality of vibration-damping foot pads; and a sealing box, installed on the installation base plate, and the air extraction pump is installed in the sealing box.

In the refrigerator of the present utility model, the oxygen in the fresh-keeping space enters the oxygen-enriched gas collection chamber through the atmosphere-modulated membrane more than the nitrogen in the fresh-keeping space through the air-conditioning membrane assembly, and the gas in the oxygen-enriched gas collection chamber It is pumped out of the fresh-keeping space, so that the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than 78/21, which can realize a nitrogen-rich and oxygen-poor gas atmosphere in the fresh-keeping space that is conducive to food preservation, and can improve the storage effect of food materials. Improve user experience.

Furthermore, in the refrigerator of the present invention, the ratio of the nitrogen content to the oxygen content in the fresh-keeping space is greater than or equal to 4.26 and less than or equal to 49, so that the ratio of the nitrogen content to the oxygen content in the fresh-keeping space is within the above range, which can effectively reduce the The strength of aerobic respiration can also ensure basic respiration, avoid anaerobic respiration of ingredients, and prolong the freshness of ingredients. In addition, the air pump assembly is set in the compressor compartment and does not occupy other places, so it will not Enlarging the extra volume of the refrigerator can make the structure of the refrigerator compact.

According to the following detailed description of specific embodiments of the utility model in conjunction with the accompanying drawings, those skilled in the art will be more aware of the above and other objectives, advantages and features of the utility model.

Description of drawings

Hereinafter, some specific embodiments of the present utility model will be described in detail in an exemplary rather than restrictive manner 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 a refrigerator according to an embodiment of the present invention;

Fig. 2 is a schematic partial structural diagram of a refrigerator 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 structural view of a sealed drawer in a refrigerator according to an embodiment of the present invention;

Figure 5 is a schematic exploded view of the sealed drawer shown in Figure 4;

Fig. 6 is a schematic diagram of the connection structure between the sealed drawer and the air pump in the refrigerator according to another embodiment of the present invention;

Fig. 7 is a schematic structural diagram of an atmosphere-modulating membrane assembly in a refrigerator according to an embodiment of the present invention;

Fig. 8 is a schematic exploded view of the air-conditioning membrane assembly shown in Fig. 7;

Fig. 9 is a schematic structural diagram of the supporting frame in the air-conditioning membrane module shown in Fig. 8;

Fig. 10 is a schematic structural view of the supporting frame in the air-conditioning membrane assembly shown in Fig. 8 from another angle; and

Fig. 11 is a schematic structural view of an air pump assembly in a refrigerator according to an embodiment of the present invention.

detailed description

This embodiment provides a refrigerator, which can realize the fresh-keeping function of controlled atmosphere by adjusting the ratio of oxygen content and nitrogen content in the fresh-keeping space. Fig. 1 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present utility model; Fig. 2 is a schematic partial structural diagram of a refrigerator 100 according to an embodiment of the present utility model; Fig. 3 is another structure shown in Fig. 2 Schematic structural view of the angle of view; FIG. 4 is a schematic structural view of the sealed drawer 11 in a refrigerator 100 according to an embodiment of the present invention; FIG. 5 is a schematic exploded view of the sealed drawer 11 shown in FIG. 4; FIG. A schematic diagram of the connection structure between the sealed drawer 11 and the air pump 41 in the refrigerator of another embodiment of the utility model. As shown in FIGS. 1 to 6 , the refrigerator 100 may generally include: a box body 10 , a door body, an air-conditioning membrane assembly 30 and an air suction pump assembly 40 .

Wherein, a storage space 102 and a compressor compartment 103 are defined inside the box body 10 . The quantity and structure of the storage space 102 can be configured according to the requirements. Fig. 1 shows the situation of the first space, the second space and the third space which are arranged up and down in sequence; the above storage spaces can be configured as refrigerated space, Freezing space, temperature-changing space or fresh-keeping space. Each storage space can be divided into multiple storage areas by partition boards, and items can be stored using shelves or drawers. In this embodiment, a storage container is arranged in the storage space, and a fresh-keeping space is defined inside the storage container. As shown in FIG. 2 , the storage container can be a sealed drawer 11 , and the fresh-keeping space is defined by the sealed drawer 11 . In some optional embodiments, the above-mentioned fresh-keeping space may also be defined by a sealed box, a sealed tank, a sealed box, and the like.

The door is disposed on the front surface of the box body 10 for closing the storage space 102 . The door body can be set corresponding to the storage space, that is, each storage space corresponds to one or more door bodies. And the quantity of storage space and door body, the function of storage space can be selected by actual situation. The refrigerator 100 of this embodiment corresponds to the first space, the second space, and the third space arranged up and down in sequence, and is respectively provided with a first door body 21 , a second door body 22 , and a third door body 23 . The door body can be pivotally arranged on the front surface of the box body, and can also be opened in a drawer type to realize a drawer-type storage space, wherein the drawer-type storage space is often equipped with metal slide rails, which can ensure that the drawer is opened and closed during the process of opening and closing. The effect is gentle and reduces noise. In the refrigerator 100 of this embodiment, the door opening method of the first space is pivotal opening, and the door opening methods of the second space and the third space are drawer opening.

The air-conditioning membrane assembly 30 has at least one air-conditioning membrane and an oxygen-enriched gas collection chamber, and is configured to make the oxygen in the airflow around the air-conditioning membrane assembly 30 more permeate the air-conditioning membrane and enter the oxygen-enriched gas relative to the nitrogen therein. Body collection chamber. The atmosphere-modulating membrane module 30 is installed in the storage container, and its surrounding space communicates with the fresh-keeping space. In this embodiment, the air-conditioning membrane module 30 can be installed in the sealed drawer 11 .

The air extraction pump assembly 40 is disposed in the compressor compartment 103 , and the air extraction pump assembly 40 includes an air extraction pump 41 . Since the oxygen-enriched gas collection chamber is set in the sealed drawer 11 , FIG. 6 shows a schematic diagram of the connection between the air pump 41 and the sealed drawer 11 , and the air pump 41 is essentially in communication with the oxygen-enriched gas collection chamber provided in the sealed drawer 11 . The inlet end of the air pump 41 is controlled to communicate with the oxygen-enriched gas collection chamber of the atmosphere-modified membrane assembly 30 via the pipeline 51 and the pipeline switching mechanism 52, so as to exhaust the gas in the oxygen-enriched gas collection chamber to the outside of the fresh-keeping space, The ratio of the nitrogen content to the oxygen content in the fresh-keeping space is greater than 78/21, wherein the sum of the nitrogen content and the oxygen content in the fresh-keeping space is greater than or equal to 83%. Those skilled in the art should recognize that the sum of nitrogen content and oxygen content in the fresh-keeping space should be less than or equal to 100%. Oxygen enters the oxygen-enriched gas collection chamber through the modified atmosphere membrane more than the nitrogen in it, and the gas in the oxygen-enriched gas collection chamber is generally oxygen-enriched gas, and the gas is discharged out of the fresh-keeping space, which can reduce the concentration of oxygen in the fresh-keeping space. content, so that the ratio of nitrogen content to oxygen content is greater than 78/21.

The refrigerator 100 can also include: a gas sensor, arranged in the fresh-keeping space, to monitor the nitrogen content and oxygen content in the fresh-keeping space, and the air pump assembly 40 can also be configured to: the ratio of the nitrogen content to the oxygen content in the fresh-keeping space When it is less than or equal to 78/21, drive the pipeline switching mechanism 52 to connect the inlet end of the air pump 41 to the pipeline of the fresh-keeping space, and control the operation of the air pump 41 to exhaust the gas in the oxygen-enriched gas collection chamber to the fresh-keeping space. Outside the space, the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than 78/21. According to different types of food materials, the ratio of nitrogen content to oxygen content can be refined on the basis of greater than 78/21, so that the gas atmosphere in the fresh-keeping space can meet the fresh-keeping needs of different types of food materials. In some embodiments, if the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than 78/21, the pipeline switching mechanism 52 can close the pipeline from the inlet end of the air pump 41 to the fresh-keeping space, and the air pump 41 will also stop running. .

As the original intake air in the fresh-keeping space, the ratio of the nitrogen content to the oxygen content is about 78/21. The body is discharged, so that the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than 78/21. In some other embodiments, the ratio of nitrogen content to oxygen content in the fresh-keeping space can also be increased by filling the fresh-keeping space with nitrogen, so that the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than 78/21. It should be noted that the use of normal air as the original intake air in this embodiment does not limit the utility model. In some other embodiments, the gas composition in the fresh-keeping space can be different from that of normal air, but the air-conditioning membrane module can also be used. 30 and air pump 40 exhaust the oxygen-enriched gas and fill the fresh-keeping space with nitrogen to increase the ratio of nitrogen content to oxygen content in the fresh-keeping space.

In a preferred embodiment, the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than or equal to 4.26 and less than or equal to 49. For example, under the premise that the sum of nitrogen content and oxygen content is not greater than 100%, the nitrogen content in the fresh-keeping space is in the range of 81% to 98%, and when the oxygen content is in the range of 2% to 19%, it is the gas of various food materials. The general suitable range for fresh-keeping, and other gases in the fresh-keeping space except nitrogen and oxygen are not oxidative, so as not to affect the storage effect of food materials.

Only by adjusting the nitrogen-rich and oxygen-deficient gas atmosphere cannot fully meet the freshness requirements of food materials, and the ratio between nitrogen content and oxygen content is also very important. The ratio of the nitrogen content to the oxygen content in the fresh-keeping space of this embodiment is greater than or equal to 4.26 and less than or equal to 49, which can effectively reduce the aerobic respiration intensity of the food materials in the fresh-keeping space, and at the same time, the oxygen content will not be too low, which can ensure The basic respiration of the ingredients prevents anaerobic respiration of the ingredients, thereby ensuring the freshness of the ingredients and prolonging the freshness of the ingredients.

The inventor found through many experiments that under the same other storage conditions and different ratios of nitrogen content to oxygen content in the fresh-keeping space, the fresh-keeping periods of various food materials are different. A specific example is introduced below: the nitrogen content in the normal air composition is about 78%, the oxygen content is about 21%, and the ratio of the nitrogen content to the oxygen content is about 78/21. The ratio of nitrogen content to oxygen content is 78/21, and under certain other storage conditions, the preservation time of apples is 12 days, the preservation time of grapes is 4 days, the preservation time of baby vegetables is 13 days, and the preservation time of broccoli The preservation time of radish is 20 days, the preservation time of fresh mushroom is 4 days, the preservation time of litchi is 7 days, the preservation time of kiwi fruit is 8 days, the preservation time of strawberry is 4 days, and the preservation time of salmon is 3 days; while the nitrogen content in the fresh-keeping space is 85%, the oxygen content is 15%, that is, the ratio of nitrogen content to oxygen content is 85/15, and other storage conditions are the same, the fresh-keeping time of apples is 50 days, grapes The fresh-keeping time of baby vegetables is 18 days, the fresh-keeping time of baby cabbage is 36 days, the fresh-keeping time of broccoli is 40 days, the fresh-keeping time of radish is 90 days, the fresh-keeping time of fresh shiitake mushrooms is 15 days, and the fresh-keeping time of litchi is 27 days. Kiwis are kept fresh for 37 days, strawberries are kept fresh for 21 days, and salmon are kept fresh for 30 days.

It can be seen from the above specific examples that when the ratio of nitrogen content to oxygen content is 85/15, the preservation time of various food materials is much longer than that when the ratio of nitrogen content to oxygen content is 78/21. At the same time, keeping the temperature in the fresh-keeping space within a certain range can help improve the fresh-keeping effect of ingredients. Different ingredients can correspond to different suitable storage temperatures. For example, the refrigeration temperature of fruit and vegetable ingredients is generally 2°C to 8°C, the refrigeration temperature of chilled fresh meat ingredients is generally -2°C to 1°C, and the freezing temperature of various ingredients is generally -22°C to -14°C. Keep the nitrogen content in the fresh-keeping space in the range of 81% to 98%, and the oxygen content in the range of 2% to 19%, and keep the temperature in the fresh-keeping space in the suitable storage temperature range of various ingredients, which can effectively improve the quality of various ingredients. fresh-keeping effect. It should be noted that the specific numerical values of the fresh-keeping time and storage temperature above are only examples, and are not limitations of the present invention.

As shown in FIG. 3 , the box body 10 may include an inner container 101 defining a storage space 102 therein. As shown in Figure 4, the sealed drawer 11 includes: a drawer cylinder 12, which has a forward opening, and is fixed to an inner container 101, which defines a fresh-keeping space; and a drawer body 13, which is slidably installed in the drawer cylinder 12 , so as to be operatively drawn out and inserted into the drawer barrel 12 from the front opening of the drawer barrel 12 . The drawer cylinder 12 can be arranged at the lower part of the inner container, and in some other embodiments, the drawer cylinder 12 can also be arranged at the middle or upper part of the inner container. In this embodiment, the liner 101 and the drawer cylinder 12 can be integrally formed, or formed separately and then installed.

A plurality of air pressure balance holes may be opened on the drawer cylinder 12 to communicate with the storage space 102 and the fresh-keeping space. Each air pressure balance hole may be a millimeter-scale micro hole, for example, the diameter of each air pressure balance hole may be 0.1 mm to 3 mm. Setting multiple air pressure balance holes can balance the pressure inside and outside the fresh-keeping space. The setting of multiple air pressure balance holes will not make the gas in the fresh-keeping space flow to the large storage space, even if the flow is small or even negligible. It will not affect the preservation of food in the fresh-keeping space. In some other embodiments, the air pressure balance hole may not be provided on the drawer cylinder 12. Even so, there is still a large amount of gas in the fresh-keeping space, such as a large amount of nitrogen in the fresh-keeping space. It doesn't need too much effort, compared with the existing vacuum storage room, it will save a lot of effort.

The atmosphere-modulating membrane assembly 30 is installed in the storage container, and its surrounding space communicates with the fresh-keeping space. In this embodiment, the air-conditioning membrane assembly 30 can be installed on the sealed drawer 11 , as shown in FIG. 5 , the air-conditioning membrane assembly 30 can be arranged on the drawer cylinder 12 , preferably on the top wall of the drawer cylinder 12 . Specifically, an accommodating cavity 121 communicating with the fresh-keeping space is provided in the top wall of the drawer cylinder 12 for accommodating the atmosphere-modulating membrane assembly 30 . At least one first ventilation hole 122 and at least one second ventilation hole 123 spaced apart from the at least one first ventilation hole 122 are opened in the wall surface between the accommodating cavity 121 of the top wall of the drawer cylinder 12 and the fresh-keeping space, to respectively The accommodating cavity 121 and the fresh-keeping space are communicated at different positions. Both the first air hole 122 and the second air hole 123 are small holes, and the number can be multiple. In some alternative embodiments, the inner side of the top wall of the drawer cylinder 12 has a concave groove. The atmosphere-modulating membrane assembly 30 is disposed in a recessed groove on the top wall of the drawer cylinder 12 .

In some embodiments of the present utility model, in order to promote the air flow in the fresh-keeping space and the accommodating cavity 121, the refrigerator 100 may further include a fan 60, which is arranged in the accommodating cavity 121, so as to promote the gas in the fresh-keeping space to pass through at least one first The ventilation hole 122, the accommodating cavity 121 and at least one second ventilation hole 123 return to the fresh-keeping space. The fan 60 is preferably a centrifugal fan, and is disposed at the first air hole 122 in the accommodation chamber 121 . That is to say, the centrifugal fan is located above at least one of the first ventilation holes 122 , and the rotation axis is vertically downward, and the air inlet is facing the first ventilation hole 122 . The air outlet of the centrifugal fan can face the air-conditioning membrane module 30 . The air-conditioning membrane assembly 30 is disposed above the at least one second ventilation hole 123 such that each air-conditioning membrane of the air-conditioning membrane assembly 30 is parallel to the top wall of the drawer cylinder 12 . At least one first ventilation hole 122 is disposed at the front of the top wall, and at least one second ventilation hole 123 is disposed at the rear of the top wall. That is, the centrifugal fan is disposed at the front of the accommodation cavity 121 , and the air-conditioning membrane assembly 30 is disposed at the rear of the accommodation chamber 121 .

Further, the top wall of the drawer cylinder 12 includes a lower plate portion 124 and a cover plate portion 125, a recess is formed in a partial area of the lower plate portion 124, and the cover plate portion 125 is detachably covered on the recess to form an accommodating Cavity 121. In order to facilitate the manufacture of the drawer cylinder 12 , the lower plate portion 124 can be integrally formed with the side wall, bottom wall and rear wall of the drawer cylinder 12 .

Fig. 7 is a schematic structural diagram of a modified atmosphere membrane assembly in a refrigerator 100 according to an embodiment of the present invention, Fig. 8 is a schematic exploded view of the modified atmosphere membrane assembly shown in Fig. A schematic structural diagram of the supporting frame in the membrane module, Fig. 10 is a schematic structural diagram of the supporting frame in the modified atmosphere membrane module shown in Fig. 8 viewed from another angle. In this embodiment, the air-conditioning membrane is an oxygen-enriched membrane, and the air-conditioning membrane assembly 30 may be an oxygen-enriched membrane assembly 31 . The oxygen-enriched membrane module 31 of this embodiment may generally include: a support frame 32 and an oxygen-enriched membrane 33 disposed on the support frame 32 .

In the embodiment of the present utility model, the oxygen-enriched membrane 33 is permeable to all gases, but different gases have different permeation degrees. Gas permeation through the oxygen-enriched membrane 33 is a complex process, and its mechanism is generally that gas molecules are first adsorbed to the surface of the oxygen-enriched membrane 33 for dissolution, then diffuse in the oxygen-enriched membrane 33, and finally pass from the other side of the oxygen-enriched membrane 33 One side desorbs out. The oxygen-enriched membrane separation technology relies on the differences in the dissolution and diffusion coefficients of different gases in the oxygen-enriched membrane 33 to achieve gas separation. When the mixed gas is under a certain driving force (pressure difference or pressure ratio on both sides of the oxygen-enriched membrane 33), the gas with a relatively fast permeation rate, such as oxygen, hydrogen, helium, hydrogen sulfide, carbon dioxide, etc., permeates the oxygen-enriched membrane 33 Finally, the permeation side of the oxygen-enriched membrane 33 is enriched, and the gas with a relatively slow permeation rate, such as nitrogen, carbon monoxide, etc., is retained on the retention side of the oxygen-enriched membrane 33 to be enriched so as to achieve the purpose of separation of mixed gases.

The support frame 32 has a first surface 321 and a second surface 322 that are parallel to each other, and the support frame 32 is formed on the first surface 321, extends on the second surface 322, and passes through the support frame 32 to communicate with the first surface 321 and the second surface 322 respectively. A plurality of airflow channels 323 on the surface 321 and the second surface 322 . A plurality of gas flow channels 323 jointly form an oxygen-enriched gas collection chamber. The oxygen-enriched membrane 33 in this embodiment is at least one, preferably, two planar oxygen-enriched membranes, which are respectively laid on the first surface 321 and the second surface 322 of the support frame 32 . The oxygen-enriched membrane 33 can allow the oxygen in the outside air to pass through the oxygen-enriched membrane 33 and enter the oxygen-enriched gas collection chamber to form oxygen-enriched gas when the pressure inside it is lower than the pressure outside, so that the air outside it becomes nitrogen-enriched gas.

In some embodiments, the support frame 32 includes an air extraction hole 324 communicating with at least one of the aforementioned plurality of gas flow channels 323 , so as to allow the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be extracted by the air extraction pump 41 . As the oxygen-enriched gas in the oxygen-enriched gas collection chamber is pumped out, the oxygen-enriched gas collection chamber is in a negative pressure state, so the oxygen in the air outside the oxygen-enriched membrane module 31 will continue to pass through the oxygen-enriched membrane 33 and enter the oxygen-enriched gas collection chamber. chamber, so that the air outside the oxygen-enriched membrane module 31 forms a nitrogen-enriched atmosphere. In some embodiments, the aforementioned plurality of airflow passages 323 formed inside the support frame 32 may be a plurality of cavities communicating with the air extraction holes 324 .

In some embodiments, referring to Fig. 8 and Fig. 9, in order to further facilitate the installation, the oxygen-enriched membrane 33 can be pre-fixed in the installation groove 327 of the support frame 32 with a circle of double-sided adhesive tape 325, and then the support frame 32 A circle of sealant 326 is filled in the ring groove 328 of the ring wire, so that the oxygen-enriched membrane 33 is installed in the installation groove 327 of the support frame 32 in a sealed manner.

The inlet end of the air pump 41 is controlled to communicate with the oxygen-enriched gas collection chamber in the fresh-keeping space via the pipeline 51 and the pipeline switching mechanism 52 , specifically, it may communicate with the air suction hole 324 . The suction pump 41 is configured to pump air outward through the suction hole 324, so that the pressure in the oxygen-enriched gas collection chamber is lower than the pressure in the fresh-keeping space. That is to say, when the air pump 41 draws air outward, the air in the fresh-keeping space can flow to the oxygen-enriched membrane module, and under the action of the oxygen-enriched membrane module, part or all of the oxygen in the air in the fresh-keeping space can enter the oxygen-enriched gas. The collection chamber is then discharged from the fresh-keeping space through the pipeline 51 and the air pump 41, so that a nitrogen-rich and oxygen-poor gas atmosphere is obtained in the fresh-keeping space to facilitate food preservation.

The oxygen-enriched membrane module uses 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 to obtain oxygen. In some other embodiments, the air-conditioning membrane can also be a hollow fiber membrane, and the air-conditioning membrane module is a hollow fiber membrane module. The hollow fiber membrane module utilizes the different permeability of each component gas in the air through the hollow fiber membrane. Oxygen molecules are smaller than nitrogen molecules, and oxygen molecules will preferentially pass through the hollow fiber membrane to obtain oxygen.

Fig. 11 is a schematic exploded view of the air extraction pump assembly 40 in the refrigerator 100 according to an embodiment of the present invention. As shown in FIG. 11 , in some embodiments of the present invention, the air pump assembly 40 may further include a mounting base plate 42 and a sealing box 43 . The installation bottom plate 42 can be installed on the bottom surface of the compressor compartment 103 through a plurality of damping pads 44 . The sealing box 43 is installed on the installation base plate 42 . The suction pump 41 is installed in the sealed box 43 . That is to say, the suction pump 41 can be arranged inside a sealed box 43 , and the sealed box 43 can be installed in the compressor chamber 103 through the installation base plate 42 . When the suction pump 41 is running, the sealed box 43 can largely block noise and/or waste heat from spreading outward. Further, in order to improve the effect of shock and noise reduction, a plurality of shock-absorbing foot pads 44 (which may be made of rubber) can also be installed on the installation base plate 42 . The number of vibration-damping foot pads 44 is preferably four, and the four vibration-damping foot pads 44 are installed in the foot pad installation holes provided at the four corners of the installation base plate 42 .

In some embodiments of the present utility model, a mounting frame is arranged inside the sealing box 43, and the mounting frame is connected with the inner wall of the sealing box 43 through a plurality of damping pads, and the air pump 41 is fixed inside the mounting frame, so as to reduce the suction pressure. Vibration and noise during air pump 41 operation. Specifically, the bottom of the installation frame is provided with two vibration-damping pads, and the vibration-damping pads are sleeved on the positioning columns on the bottom surface of the sealing box 43 . One opposite side of the installation frame is respectively provided with a circular vibration-damping pad, and is clamped in the slot of the corresponding side wall of the sealing box 43 . A shock-absorbing spacer is respectively fixed on the other opposite two sides of the installation frame. The air suction pump 41 can be located between the vibration-damping pads in the sealed box 43 and fastened to the installation frame by screws.

The refrigeration system of the refrigerator 100 may be a refrigeration cycle system composed of a compressor, a condenser, a throttling device, an evaporator, and the like. The compressor is installed in the compressor chamber 103 . The evaporator is configured to directly or indirectly provide cold energy into the storage space 102 . For example, when the refrigerator is a domestic compression type direct cooling refrigerator, the evaporator can be arranged outside or inside the rear wall of the inner container. When the refrigerator is a household compressed air-cooled refrigerator, there is also an evaporator room in the box body 10, the evaporator room communicates with the storage space 102 through the air duct system, and an evaporator is arranged in the evaporator room, and a fan is arranged at the outlet. To circulate refrigeration to the storage space 102 .

In some embodiments of the present utility model, the air pump 41 is arranged at one end of the compressor chamber 103, and the compressor can be arranged at the other end of the compressor chamber 103, so that the distance between the air pump 41 and the compressor is relatively far to reduce noise Overlay and waste heat overlay. For example, the air suction pump 41 may be disposed at one end of the compressor compartment 103 adjacent to the pivoting side of the door body. When the refrigerator is a side-by-side refrigerator, the air pump 41 can be arranged at any end of the compressor chamber 103 . In some other embodiments of the present invention, the air pump 41 is arranged close to the compressor, and the air pump 41 is arranged at one end of the compressor chamber 103 and between the compressor and the side wall of the compressor chamber 103 . The air pump 41 is arranged in the compressor compartment 103, which can make full use of the space of the compressor compartment and does not occupy other places. Therefore, the extra volume of the refrigerator will not be increased, and the structure of the refrigerator can be made compact.

In the refrigerator 100 of this embodiment, the oxygen in the fresh-keeping space is allowed to enter the oxygen-enriched gas collection chamber through the atmosphere-modified membrane assembly more than the nitrogen in the fresh-keeping space, and the oxygen-enriched gas is collected in the oxygen-enriched gas collection chamber by the air pump 41. The gas is pumped out of the fresh-keeping space, so that the ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than 78/21, and a nitrogen-rich and oxygen-poor gas atmosphere conducive to food preservation can be realized in the fresh-keeping space, which can improve the storage effect of food materials , to improve user experience.

Further, in the refrigerator 100 of this embodiment, the ratio of the nitrogen content to the oxygen content in the fresh-keeping space is greater than or equal to 4.26 and less than or equal to 49, so that the ratio of the nitrogen content to the oxygen content in the fresh-keeping space is within the above range, which can effectively reduce the The strength of the aerobic respiration of the ingredients can also ensure the basic respiration, avoid the anaerobic respiration of the ingredients, thereby prolonging the freshness period of the ingredients. In addition, the air pump assembly 40 is arranged in the compressor compartment and does not occupy other places, so The extra volume of the refrigerator will not be increased, and the structure of the refrigerator can be made compact.

So far, those skilled in the art should recognize that although a number of exemplary embodiments of the present invention have been shown and described in detail herein, they can still be used according to the present invention without departing from the spirit and scope of the present invention. Many other variations or modifications that conform to the principles of the utility model are directly determined or derived from the disclosed content of the new model. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A refrigerator, characterized in that, comprising: The box body defines a storage space and a compressor chamber inside, a storage container is arranged in the storage space, and a fresh-keeping space is defined inside the storage container; a door body, arranged on the front surface of the box body, for closing the storage space; The air-modified membrane assembly is installed in the storage container and its surrounding space communicates with the fresh-keeping space. The air-modified membrane assembly has at least one air-modified membrane and an oxygen-enriched gas collection chamber, and is configured such that the air Oxygen in the airflow in the space around the membrane assembly is more permeable to the oxygen-enriched gas collection chamber than the nitrogen in it; and An air extraction pump assembly is arranged in the compressor chamber, the air extraction pump assembly includes an air extraction pump, the inlet end of the air extraction pump is controlled to communicate with the oxygen-enriched gas collection chamber via a pipeline and a pipeline switching mechanism, The gas in the oxygen-enriched gas collection chamber is pumped out of the fresh-keeping space, so that the ratio of the nitrogen content to the oxygen content in the fresh-keeping space is greater than 78/21, wherein the nitrogen content in the fresh-keeping space is equal to The sum of the oxygen content is greater than or equal to 83%. 2. The refrigerator according to claim 1, characterized in that, The ratio of nitrogen content to oxygen content in the fresh-keeping space is greater than or equal to 4.26 and less than or equal to 49. 3. The refrigerator according to claim 1, characterized in that, The modified atmosphere membrane module is an oxygen-enriched membrane module, and the at least one modified atmosphere membrane is at least one oxygen-enriched membrane. 4. The refrigerator according to claim 3, wherein the oxygen-enriched membrane module further comprises: A support frame, which has a first surface and a second surface parallel to each other, and the support frame is formed with a structure respectively extending on the first surface, extending on the second surface, and penetrating through the support frame to A plurality of gas flow channels communicating with the first surface and the second surface, the plurality of gas flow channels jointly form the oxygen-enriched gas collection chamber, and The at least one oxygen-enriched membrane is two planar oxygen-enriched membranes laid on the first surface and the second surface of the supporting frame respectively. 5. The refrigerator according to claim 1, characterized in that, The storage container is a sealed drawer, and the fresh-keeping space is defined by the sealed drawer. 6. The refrigerator according to claim 5, wherein the box body comprises: The inner container defines the storage space. 7. The refrigerator according to claim 6, wherein the sealed drawer comprises: The drawer cylinder has a forward opening and is fixed to the inner container, defining the fresh-keeping space therein; and The drawer body is slidably installed in the drawer cylinder, so as to be operable to be drawn out from the front opening of the drawer cylinder and inserted inward into the drawer cylinder. 8. The refrigerator according to claim 7, characterized in that, A plurality of air pressure balance holes are opened on the drawer cylinder to communicate with the storage space and the fresh-keeping space. 9. The refrigerator according to claim 7, characterized in that, An accommodating cavity communicating with the fresh-keeping space is provided in the top wall of the drawer cylinder to accommodate the modified atmosphere membrane assembly, and At least one first vent hole and at least one second vent hole spaced apart from at least one first vent hole are opened in the wall surface between the accommodating cavity and the fresh-keeping space of the top wall of the drawer cylinder , so as to communicate with the accommodating cavity and the fresh-keeping space at different positions respectively; The refrigerator further includes a blower installed in the accommodating chamber to urge the gas in the fresh-keeping space to return to the Storage space. 10. The refrigerator according to claim 1, wherein the air extraction pump assembly further comprises: Install the bottom plate, installed on the bottom surface of the compressor chamber through a plurality of damping pads; and A sealed box is installed on the installation base plate, and the air suction pump is installed in the sealed box.