CN106766521B - Refrigeration and freezing equipment - Google Patents

Abstract

The invention provides a refrigeration and freezing device. The refrigeration and freezing device includes: a box in which a storage container with a controlled atmosphere preservation space is provided; a gas separator having an atmosphere-controlled membrane, a first gas collection chamber and a second gas collection chamber, and the atmosphere-controlled membrane is located at the third gas collection chamber. between a gas collection chamber and a second gas collection chamber, and allow the remaining gas from the air entering the first gas collection chamber after removing the gas that has entered the second gas collection chamber through the atmosphere-controlled membrane to enter the atmosphere-controlled fresh-keeping space; The air extraction pump is disposed on the top of the box and communicates with the second gas collection chamber through a pipeline to exhaust the gas penetrating into the second gas collection chamber out of the gas separator. The refrigeration and freezing device of the present invention not only has good fresh-keeping effect, low noise and low cost, but also can fully utilize the top space of the box.

Description

Refrigeration and freezing equipment

Technical field

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

Background technique

A refrigerator is a refrigeration device that maintains a constant low temperature. It is also a civilian product that keeps food or other items in a constant low temperature. As the quality of life improves, consumers have higher and higher requirements for the preservation of stored food, especially for the color and taste of food. Therefore, stored food should also ensure that the color, taste, freshness, etc. of the food remain unchanged as much as possible during the storage period. Currently, in order to better store food, there is only one type of vacuum preservation on the market. The commonly used vacuum preservation methods are vacuum bag preservation and vacuum storage compartment preservation.

When using vacuum bags to keep food fresh, consumers need to vacuum each time they store food, which is cumbersome to operate and not favored by consumers.

Vacuum storage compartments are used to preserve freshness. Since the cabinets are rigid structures and must be maintained in a vacuum state, the requirements for the vacuum system and the sealing performance of the refrigerator are very high. Every time an item is taken and placed, new items are poured in. There is a lot of air, which consumes a lot of energy. Moreover, in a vacuum environment, it is difficult for food to absorb cold energy, which is especially unfavorable for food storage. In addition, due to the vacuum environment, users need to expend a lot of effort to open the refrigerator door every time, causing inconvenience to users. Although some refrigerators can ventilate the vacuum storage room through the vacuum system, this will cause the user to wait for a long time and the timeliness is poor. A long vacuum time will also cause serious deformation of the refrigerator box, etc. That is, the existing refrigerators with a vacuum structure cannot complete vacuum preservation well, and the box, etc. need to be very strong, which requires high implementation requirements and high cost. .

In addition, the inventor found that: due to the large size and high cost of nitrogen-generating equipment traditionally used for controlled atmosphere preservation, this technology is basically limited to use in various large-scale professional storage warehouses (storage capacity is generally at least 30 tons or more) ). It can be said that what kind of appropriate gas adjustment technology and corresponding devices can be used to economically miniaturize and silence the air conditioning system and make it suitable for families or individual users? This is a question that technicians in the field of controlled atmosphere preservation have been eager to solve but have never yet solved. technical problems that can be successfully solved.

Contents of the invention

An object of the present invention is to overcome at least one defect of the existing refrigerator and provide a refrigeration and freezing device that creatively separates oxygen in the air through a gas separator and then fills the remaining nitrogen-rich gas into Controlled atmosphere preservation space, thereby obtaining a nitrogen-rich and oxygen-poor gas atmosphere in the controlled atmosphere preservation space, which is conducive to food preservation. This gas atmosphere reduces the intensity of aerobic respiration of fruits and vegetables by reducing the oxygen content in the fruit and vegetable preservation space, while ensuring basic Respiration prevents fruits and vegetables from anaerobic respiration, thereby achieving the purpose of long-term preservation of fruits and vegetables.

A further object of the present invention is to make full use of the top space and storage space of the refrigeration and freezing device, so that the refrigeration and freezing device has a compact structure and high energy efficiency.

In particular, the present invention provides a refrigeration and freezing device, which includes:

The box body has a storage space defined in the box body, a storage container is provided in the storage space, and the storage container has a controlled atmosphere fresh-keeping space;

A gas separator, the gas separator has a gas-controlled membrane, a first gas collection chamber and a second gas collection chamber, the gas-controlled membrane is located between the first gas collection cavity and the second gas collection cavity; the gas-controlled membrane is configured such that the first gas collection chamber Compared with the nitrogen in the air in the gas collection chamber, more oxygen in the air passes through the air-regulating membrane and enters the second gas collection chamber; the first gas collection chamber is connected to the external space of the gas separator in a controlled manner, so that the gas separator The air from the external space enters the first gas collection chamber, and the first gas collection chamber is also connected to the controlled atmosphere fresh-keeping space, so that the air entering the first gas collection chamber is removed from the air that has passed through the atmosphere-controlled membrane and entered the third gas collection chamber. The remaining gas after the gas in the two gas collection chambers enters the controlled atmosphere preservation space; and

The air extraction pump is disposed on the top of the box and communicates with the second gas collection chamber through a pipeline to exhaust the gas penetrating into the second gas collection chamber out of the gas separator.

Optionally, the refrigeration and freezing device further includes an axial flow fan, which is disposed on the flow path from the first gas collection chamber to the controlled atmosphere fresh-keeping space, and is configured to be started in a controlled manner to promote the remaining gas to flow into the controlled atmosphere fresh-keeping space.

Optionally, the storage container is a drawer assembly, including:

A drawer cylinder has a forward opening and is arranged in the storage space; and

The drawer body is slidably disposed in the drawer barrel so as to be operable to draw out and insert the drawer barrel inwardly from the forward opening of the drawer barrel.

Optionally, a receiving space is defined at the rear of the top end of the box to accommodate the air extraction pump.

Optionally, the refrigeration and freezing device further includes a refrigeration system configured to provide cold energy to the storage space, and the refrigeration system has a compressor and is installed in the storage space.

Optionally, the refrigeration and freezing device also includes:

Install the top plate and install it on the top surface of the accommodation space through multiple vibration-absorbing foot pads; and

Sealed box, mounted on the mounting roof; and

The air pump is installed in the sealed box.

Optionally, heat dissipation holes are provided at both transverse ends of the top wall of the accommodation space and both transverse ends of the rear wall; and the air extraction pump is provided at one transverse end of the accommodation space.

Optionally, the upper edge of the front wall of the accommodation space is in front of the lower edge; and the storage space includes a first space in front of the front wall of the accommodation space, and a first space below the bottom wall of the accommodation space. Second space.

Optionally, the gas separator is provided inside the storage space and located on the rear side of the drawer cylinder.

Optionally, the gas separator further includes a gas collection box, which is provided with a horizontal support frame. The support frame and the upper half of the gas collection box jointly define a first gas collection chamber. The support frame and the gas collection box The lower half of the box jointly defines a second gas collection chamber; the gas-modulating membrane is arranged on the support frame.

The refrigeration and freezing device of the present invention includes a gas separator with an atmosphere-controlled membrane and two gas collection chambers to separate gas into oxygen and nitrogen-rich gas, so that the atmosphere-controlled fresh-keeping space filled with the nitrogen-rich gas can be formed A gas atmosphere rich in nitrogen and poor in oxygen, which is beneficial to food preservation. This gas atmosphere reduces the intensity of aerobic respiration of fruits and vegetables by reducing the oxygen content in the storage space of fruits and vegetables. It also ensures basic respiration and prevents fruits and vegetables from anaerobic respiration, thereby achieving the best results for fruits and vegetables. The purpose of long-term preservation.

Furthermore, since the gas separator in the refrigeration and freezing device of the present invention is inflatable, there is sufficient nitrogen-rich gas in the controlled atmosphere preservation space, which can solve the problem of negative pressure in the controlled atmosphere preservation space using vacuum preservation and other technologies. This makes it faster and more convenient for users to open the controlled atmosphere fresh-keeping space to access items.

Furthermore, since the air extraction pump in the refrigeration and freezing device of the present invention is arranged on the top of the box, the space at the top of the refrigeration and freezing device can be fully utilized to prevent the storage compartment space at the top of the existing refrigeration and freezing device from being too high due to the height of the refrigeration and freezing device. cannot be fully utilized. Moreover, when the compressor is also installed on the top of the refrigeration and freezing device, the volume of the lower storage space becomes larger. Although the total storage space volume of the refrigeration and freezing device may remain unchanged, the top storage space cannot be fully utilized. The rear part is fully utilized, and the lower storage space becomes larger, which in a sense also significantly increases the storage volume and improves user convenience. In addition, when the compressor is installed at the bottom of the refrigeration and freezing device, it can solve the resonance problem and heat superposition problem between the compressor and the air pump, and significantly reduce the noise. Therefore, in the refrigeration and freezing device of the present invention, arranging the air extraction pump on the top of the box has unexpected technical effects.

Furthermore, the refrigeration and freezing device of the present invention not only has a good fresh-keeping effect, but also has low rigidity and strength requirements for storage containers, etc., and the implementation requirements are very low, so the cost is also very low. Moreover, the refrigeration and freezing device of the present invention can well solve the above-mentioned technical problems that those skilled in the field of controlled atmosphere preservation have been eager to solve but have never been able to successfully solve. The refrigeration and freezing device of the present invention is not only small in size, but also has low noise, and is particularly suitable for family and personal use.

Furthermore, the refrigeration and freezing device of the present invention is preferably a household refrigerator, such as a household compression direct-cooling refrigerator, a household compression air-cooling refrigerator, a semiconductor refrigeration refrigerator, etc.

From the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will further understand the above and other objects, advantages and features of the present invention.

Description of the drawings

Some specific embodiments of the invention will be described in detail below by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar parts or portions. Those skilled in the art will appreciate that these drawings are not necessarily drawn to scale. In the attached picture:

Figure 1 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a refrigeration and freezing device with part of the structure hidden according to an embodiment of the present invention;

Figure 3 is a schematic structural diagram of a refrigeration and freezing device with part of the structure hidden according to an embodiment of the present invention;

Figure 4 is a schematic structural diagram of a refrigeration and freezing device with part of the structure hidden according to an embodiment of the present invention;

Figure 5 is a schematic cross-sectional view of a gas separator in a refrigeration and freezing device according to one embodiment of the present invention;

Figure 6 is a schematic exploded view of the air extraction pump assembly in the refrigeration and freezing device according to one embodiment of the present invention;

Figure 7 is a schematic diagram of a storage container in a refrigeration and freezing device according to an embodiment of the present invention.

Detailed ways

Figure 1 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention. As shown in Figure 1 and with reference to Figures 2 to 4, an embodiment of the present invention provides a refrigeration and freezing device, which may include a box body 20, a main door body, a gas separator 30, an air extraction pump 41 and a refrigeration system.

A storage space 200 is defined inside the box 20 . For example, the case 20 may include an inner bladder defining a storage space 200 therein. The main door body may be composed of two bi-fold door bodies 28, both of which are rotatably installed on the box body 20 and configured to open or close the storage space 200 defined by the box body 20. The main door body can also be one door body. Further, a storage container 21 is provided in the storage space 200, and a controlled atmosphere fresh-keeping space 210 is provided in the storage container 21. The controlled atmosphere fresh-keeping space 210 may be a closed space or a nearly closed space. Preferably, the storage container 21 is a drawer assembly. The storage container 21 may include a drawer cylinder 22 and a drawer body 23 . The drawer cylinder 22 may have a forward opening and be disposed in the storage space 200 , specifically, it may be disposed in the lower part of the storage space 200 . As those skilled in the art can appreciate, the drawer cylinder 22 can also be disposed in the middle or upper portion of the storage space 200 . The drawer body 23 is slidably disposed within the drawer barrel 22 so as to be operable to draw out and insert the drawer barrel 22 inwards from the forward opening of the drawer barrel 22 . The drawer body 23 may have a drawer end cover, and the drawer end cover may cooperate with the opening of the drawer barrel 22 to seal the controlled atmosphere fresh-keeping space 210 . In some alternative embodiments, storage container 21 may include a barrel and a small door configured to open or close the barrel.

The refrigeration system is configured to provide cooling energy to the storage space 200 . Specifically, in some embodiments, the refrigeration system may be a refrigeration cycle system composed of a compressor, a condenser, a throttling device, an evaporator, and the like. The evaporator is configured to provide cooling energy directly or indirectly into the storage space 200 . For example, when the refrigeration and freezing device is a household compression direct-cooling refrigerator, the evaporator can be disposed outside or inside the rear wall of the inner pot. When the refrigeration and freezing device is a household compression air-cooled refrigerator, the box 20 also has an evaporator chamber. The evaporator chamber is connected to the storage space 200 through the air duct system, and an evaporator is provided in the evaporator chamber, and an evaporator is provided at the outlet. A fan is used to circulate refrigeration to the storage space 200 . In other embodiments, the refrigeration system may also be a semiconductor refrigeration device.

Figure 5 is a schematic cross-sectional view of a gas separator in a refrigeration and freezing device according to an embodiment of the present invention. As shown in FIG. 5 , the gas separator 30 has an air conditioning membrane 300 , a first gas collection chamber 310 and a second gas collection chamber 320 . The gas-modifying membrane 300 is located between the first gas collection chamber 310 and the second gas collection chamber 320 to separate the first gas collection chamber 310 and the second gas collection chamber 320 . The first gas collection chamber 310 is configured to be in controlled communication with the external space of the gas separator 30 (such as the storage space 200, the space outside the box 20, etc.), so that the pressure in the first gas collection chamber 310 is less than that of the gas separator. When the pressure of the external space is high, the air in the external space of the gas separator is allowed to enter the first gas collection chamber 310 . The gas-regulating membrane 300 is configured to allow the air in the external space of the gas separator to enter the first gas collection chamber 310 when the pressure of the first gas collection chamber 310 is greater than the pressure of the second gas collection chamber 320 . More oxygen in the air in the first gas collection chamber 310 than nitrogen therein passes through the controlled atmosphere membrane 300 and enters the second gas collection chamber 320 . The first gas collection chamber 310 is also configured to controllably communicate with the controlled atmosphere preservation space. 210 is connected, so that when the pressure of the first gas collection chamber 310 is greater than the pressure of the controlled atmosphere preservation space 210, the air entering the first gas collection chamber 310 can be removed from the air that has passed through the air conditioning membrane 300 and entered the second gas collection chamber 320. The remaining gas after the gas enters the controlled atmosphere preservation space 210, thereby obtaining a nitrogen-rich and oxygen-poor gas atmosphere in the controlled atmosphere preservation space 210, which is beneficial to food preservation. The air extraction pump 41 can be connected to the second gas collection chamber 320 via the pipeline 50 to urge the gas in the second gas collection chamber 320 to flow out of the gas separator 30 .

That is to say, in the gas separator 30 , the gas-regulating membrane 300 is configured such that more oxygen in the air in the first gas collection chamber 310 penetrates the gas-regulating membrane 300 into the second gas collection chamber 320 relative to the nitrogen therein. . The first gas collection chamber 310 is in controllable communication with the external space of the gas separator 30 , so that the air in the external space of the gas separator 30 enters the first gas collection chamber 310 , and the first gas collection chamber 310 is also in controllable communication with the external space of the gas separator 30 . The controlled atmosphere fresh-keeping space 210 is connected, so that the remaining gas from the air entering the first gas collection chamber 310 after removing the gas that has entered the second gas collection chamber 320 through the controlled atmosphere membrane 300 enters the controlled atmosphere fresh-keeping space 210 . The air extraction pump 41 is configured to exhaust the gas penetrating into the second gas collection chamber 320 to the outside of the gas separator 30 .

Specifically, the air extraction pump 41 causes the gas in the second gas collection chamber 320 to flow out through the pipeline 50 by pumping air outward, thereby reducing the pressure of the second gas collection chamber 320 . When the pressure of the second gas collection chamber 320 is lower than the pressure of the first gas collection chamber 310 , gases such as oxygen with a relatively fast permeation rate in the air in the first gas collection chamber 310 enter into the second gas collection chamber 310 under the action of the pressure and the gas-regulating membrane 300 . two gas collection chambers 320. At this time, since part of the oxygen in the first gas collection chamber 310 enters the second gas collection chamber 320, other gases with a relatively slow permeation rate that contain only a small amount of oxygen or no oxygen are formed in the first gas collection chamber 310, that is, It is a nitrogen-rich gas. Furthermore, the pressure of the first gas collection chamber 310 decreases due to the reduction of oxygen in the gas therein, so that the air in the storage space 200 enters the first gas collection chamber 310 due to the pressure difference, and flows between the air pump 41 and the air. Under the action of the adjusting membrane 300, gases such as oxygen with a relatively fast penetration rate in the air entering the first gas collection chamber 310 are continuously discharged into the second gas collection chamber 320. That is to say, the air pump 41 causes the air in the storage space 200 to continue to enter the gas separator 30 by pumping air outward, and under the action of the air-regulating membrane 300, it is formed in the first gas collection chamber 310 to remove air that has entered the second gas separator. The remaining gas in the gas collection chamber 320 is nitrogen-rich gas. At this time, the first gas collection chamber 310 can be controlled to communicate with the controlled atmosphere preservation space 210 so that the nitrogen-rich gas can be filled into the controlled atmosphere preservation space 210 .

The refrigeration and freezing device of the present invention can form a nitrogen-rich and oxygen-poor gas atmosphere in the controlled atmosphere preservation space 210 to facilitate food preservation. This gas atmosphere reduces the intensity of aerobic respiration of fruits and vegetables by reducing the oxygen content in the fruit and vegetable preservation space, while ensuring Basic respiration prevents fruits and vegetables from anaerobic respiration, thereby achieving the purpose of long-term preservation of fruits and vegetables.

In some embodiments of the present invention, a receiving space 24 is defined at the rear of the top of the box 20 to accommodate the air suction pump 41 . In this embodiment, the inventor found that the rear part of the storage space at the top of the existing refrigeration and freezing device is often left unused without items. The possible reason is that the refrigeration and freezing device is too high or too deep, or for other reasons, it is inconvenient for the user to move the storage space there. When items are put in, the inventor of the present application creatively utilizes this space and sets a storage space 24 for accommodating the air pump 41 here. Further, the accommodating space 24 extends along the width direction (transverse direction) of the box 20, the upper edge of the front wall of the accommodating space 24 is in front of the lower edge, and the front wall of the accommodating space 24 extends from its upper edge. The bend extends to its lower edge, and the front wall can also be in the shape of an inclined plate. The storage space 200 includes a first space in front of the front wall of the accommodation space 24 and a second space below the bottom wall of the accommodation space 24 .

In some embodiments of the present invention, the storage space 200 is a refrigerated space, and its storage temperature is generally between 2°C and 10°C, preferably 3°C and 8°C. Furthermore, the box 20 can also define a freezing space 25 and a temperature-changing space 26. The freezing space 25 is provided below the storage space 200, and the temperature-changing space 26 is provided between the freezing space 25 and the refrigeration space. The temperature range in the freezing space 25 is generally -14°C to -22°C. The variable temperature space 26 can be adjusted according to needs to store suitable food. In some alternative embodiments of the present invention, the storage space 200 can also be a freezer space or a variable temperature space. That is to say, the temperature range of the storage space 200 can be controlled at -14°C to -22°C or adjusted according to needs. . Furthermore, the relative positions of the refrigeration space, the freezing space 25 and the temperature-changing space 26 can be adjusted according to actual needs.

In some embodiments of the present invention, when the refrigeration system includes a compressor, the compressor can be disposed at the rear of the bottom end of the box 20, so that the compressor and the suction pump 41 can be sufficiently separated to prevent the superposition of heat and noise. . In some preferred embodiments of the present invention, the compressor can be installed in the accommodation space 24, which can significantly increase the user-friendly bottom storage space.

In some embodiments of the present invention, the air pump 41 is disposed at one lateral end of the accommodation space 24 . The compressor can be disposed at the other lateral end of the accommodation space 24 so that the air pump 41 is relatively far away from the compressor, thereby reducing noise superposition and waste heat superposition. The compressor can also be installed close to the air suction pump 41 .

Figure 6 is a schematic exploded view of the air extraction pump assembly 40 in the refrigeration and freezing device according to one embodiment of the present invention; further, in order to reduce noise, as shown in Figure 6, in some embodiments of the present invention, the refrigeration and freezing device can also Including mounting top plate 42 and sealing box 43. The mounting top plate 42 can be installed on the top surface of the accommodation space 24 through a plurality of vibration-absorbing foot pads 44 . The sealing box 43 is installed on the mounting top plate 42 . The air pump 41 is installed in the sealed box 43 . That is to say, the air pump 41 can be disposed inside a sealed box 43 , and the sealed box 43 can be installed in the accommodation space 24 by installing the top plate 42 . The sealing box 43, the mounting top plate 42 and the air pump 41 may also be referred to as the air pump assembly 40. When the air extraction pump 41 is running, the sealed box 43 can block the outward transmission of noise and/or waste heat to a great extent. Further, in order to improve the shock and noise reduction effect, a plurality of shock absorbing foot pads 44 (which may be made of rubber) can be installed on the mounting top plate 42 . The number of the vibration-damping foot pads 44 is preferably four, and the four vibration-damping foot pads 44 are installed in the foot pad mounting holes opened at the four corners of the mounting top plate 42 .

In some embodiments of the present invention, a mounting frame is provided inside the sealing box 43. The mounting frame and the inner wall of the sealing box 43 are connected through a plurality of vibration-absorbing pads. The air pump 41 is fixed inside the installation frame, so as to reduce the pressure of the air pump. 41 Vibration and noise during operation. Specifically, two damping pads are provided on the top of the installation frame, and the damping pads are set on the positioning posts on the top surface of the sealing box 43 . A circular vibration-absorbing pad is provided on each opposite side of the mounting frame, and is clamped in a slot on the corresponding side wall of the sealing box 43 . A vibration-absorbing pad is fixed on each of the other opposite sides of the mounting frame. The air extraction pump 41 can be located between the various vibration-absorbing pads in the sealing box 43, and is fastened to the installation frame through screws.

In order to facilitate heat dissipation, heat dissipation holes are provided at both lateral ends of the top wall and the rear wall of the accommodation space 24 to increase the heat dissipation effect and ensure the stability of the operation of the compressor and the air pump 41 . Furthermore, containment. The refrigeration and freezing device may also include a cooling fan to promote the flow of cooling air.

The pipeline 50 may include connecting pipe sections extending from top to bottom. The connecting pipe section is disposed behind the storage space 200 , and the upper end of the connecting pipe section is connected with the inlet of the air extraction pump 41 , and the lower end of the connecting pipe section is connected with the second gas collection chamber of the gas separator 30 . The connecting pipe section can be arranged adjacent to the side shell and the back plate of the box 20. The connecting pipe section can be equipped with an insulation sleeve or an insulating pipe, which can prevent the cold energy in the oxygen in the connecting pipe section from being transferred to the side shell and the back plate, and can prevent condensation from occurring. .

In some embodiments of the present invention, as shown in FIG. 5 , the gas separator 30 may include a gas collection box 31 . The gas collection box 31 is provided with a horizontal support frame 32 . The support frame 32 and the upper half of the gas collection box 31 jointly define a first gas collection chamber 310 . The support frame 32 and the lower half of the gas collection box 31 The boxes together define a second gas collection chamber 320 . Further, the atmosphere-modifying membrane 300 can be disposed on the support frame 32 , with two surfaces of the atmosphere-adjusting membrane 300 facing the upper half box and the lower half box of the gas collection box 31 respectively.

In some embodiments of the present invention, the gas collection box 31 may also be provided with three vent holes that can be controlled to be opened. The three vent holes may be respectively a first vent hole for allowing the air in the storage space 200 to enter the first gas collection chamber 310, and a second vent hole for allowing nitrogen-rich gas to be filled from the first gas collection chamber 310 into the controlled atmosphere preservation space 210. The vent hole and the third vent hole allow the oxygen-rich gas to flow out of the second gas collection chamber 320 .

That is to say, the first gas collection chamber 310 can communicate with the storage space 200 through the first vent hole. Specifically, when the pressure of the first gas collection chamber 310 is less than the pressure of the storage space 200, the first vent hole is controlled to open. At this time, the second vent hole is controlled to close, so that the pressure of the first gas collection chamber 310 increases and a large amount of nitrogen-rich gas is formed. It can be understood that since gases with a relatively slow permeation rate such as nitrogen cannot pass through the air-regulating membrane 300 and enter the second gas collection chamber 320 in large quantities, the pressure of the first gas collection chamber 310 will continue to increase. When the pressure of the first gas collection chamber 310 is greater than or equal to the pressure of the storage space 200, the first vent hole can be controllably closed. At this time, the second vent hole can be controllably opened, so that the inside of the first gas collection chamber 310 can be controlled. A large amount of nitrogen-rich gas flows to the controlled atmosphere preservation space 210. The third vent hole can remain open when the first vent hole and/or the second vent hole is opened, so that the oxygen-rich gas in the second gas collection chamber 320 can be extracted by the air pump 41 in time, thereby promoting the storage space 200 The internal air continues to flow into the first gas collection chamber 310. In some embodiments of the invention, the second vent hole may also be configured to open with a delay. Specifically, when the first vent hole is opened, the second vent hole waits for a preset time before opening again, so that sufficient nitrogen-rich gas is formed in the first gas collection chamber 310 .

In some embodiments of the present invention, the refrigeration and freezing device may further include an axial flow fan 60 . The axial flow fan 60 can be disposed on the flow path from the first gas collection chamber 310 to the controlled atmosphere preservation space 210, and is configured to be started in a controlled manner, and promote the removal of gases in the first gas collection chamber 310 that have entered through the controlled atmosphere membrane 300. The remaining gas in the second gas collection chamber 320 accelerates to flow toward the controlled atmosphere preservation space 210 . Specifically, the axial flow fan 60 is configured such that its air inlet faces the first gas collection chamber 310 and its air outlet faces the air-conditioned fresh-keeping space 210 to promote the nitrogen-rich gas flowing out of the first gas collection chamber 310 to accelerate toward the air-conditioned space. Fresh storage space 210. Further, the axial flow fan 60 may be configured to open with the opening of the second vent hole.

In some embodiments of the present invention, as shown in FIG. 3 , the gas separator 30 may be disposed inside the storage space 200 and located at the rear side of the drawer cylinder 22 . That is to say, the gas separator 30 can be independently and integrally disposed outside the air-conditioned fresh-keeping space 210, thereby making it easy to install and disassemble.

In some embodiments of the present invention, as shown in FIG. 7 , a plurality of air pressure balance holes 221 may be provided on the drawer cylinder 22 , and the storage space 200 and the air-conditioned fresh-keeping space 210 are connected through the plurality of air pressure balance holes 221 . The air pressure balance holes 221 may be millimeter-sized micropores, for example, the diameter of each air pressure balance hole 221 is 0.1 mm to 3 mm. Providing multiple air pressure balance holes 221 can prevent the pressure in the controlled atmosphere fresh-keeping space 210 from being too high. Specifically, when the pressure in the controlled atmosphere fresh-keeping space 210 is too high, a small amount of gas in the controlled atmosphere fresh-keeping space 210 can be balanced by air pressure. The hole 221 flows into the storage space 200 to prevent the pressure of the air-conditioned fresh-keeping space 210 from being too high. When a small amount of gas flows out of the controlled atmosphere preservation space 210, the nitrogen-rich and oxygen-poor gas atmosphere in the controlled atmosphere preservation space 210 will not change, or the change will be so small that it can be ignored.

In some embodiments of the present invention, a locking device, a handle and a handle positioning device are provided between the drawer body 23 and the drawer cylinder 22 . The locking device includes pivot locks provided on both sides of the drawer end cover, two buckling portions provided on the drawer barrel 22, and a snapping urging device. Each snap portion may be a protrusion. The snapping urging device can be used to urge the two pivot locks to rotate in the direction of snapping on the respective corresponding buckling portions (ie, respective first directions). The handle extends horizontally and is slidably mounted on the drawer end cover in a vertical direction. Moreover, when the drawer body 23 is in a closed state, the position of the handle may be the initial position of the handle. And the handle is configured such that when in its initial position, its two ends are in contact with two pivot locks respectively to prevent each pivot lock from rotating in another direction opposite to its corresponding first direction, so that The pivot lock lock maintains a mating state with the buckle portion, thereby locking the drawer body 23 to the drawer barrel 22 . Further, when the handle moves upward or downward to the unlocking position, that is, after moving from the initial position to the unlocking position, each pivot lock can be allowed to rotate in another direction opposite to its corresponding first direction. , to allow the pivot lock to rotate away from the corresponding snap portion when the drawer body 23 is pulled outward, thereby allowing the drawer body 23 to be opened. The handle positioning device is configured to keep the handle at each predetermined position after the handle moves to the position, mainly the initial position and the unlocked position. When opening the drawer body 23, the user first moves the handle up or down to the unlocked position. The handle positioning device keeps the handle in this position, and the user can pull the drawer body 23 outward. When closing the drawer body 23, the user first closes the drawer body 23, and then returns the handle downward or upward to the initial position. The handle positioning device keeps the handle in this position, thereby keeping the drawer body 23 and the drawer cylinder 22 locked. state.

In order to further stabilize the movement of the handle, guide rods and slide blocks are respectively provided at both ends of the handle, and the guide rods extend in the vertical direction. The drawer body 23 also includes two sets of slides, each set of slides has at least three slide grooves extending in the vertical direction, so that both sides of the guide rod have one slide groove respectively, and the slide blocks move on the remaining slide grooves, or There is one slide groove on both sides of the slide block, and the guide rod moves on the remaining slide grooves. For example, each set of slideways may include four slideways, one slideway on the front and rear sides of the guide rod, and one slideway on both transverse sides (ie, left and right sides) of the slide block.

By now, those skilled in the art will appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, the disclosed embodiments may still be practiced in accordance with the present invention without departing from the spirit and scope of the present invention. The content directly identifies or leads to many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A refrigeration and freezing device, characterized in that it includes: A box body, a storage space is defined in the box body, a storage container is provided in the storage space, and a controlled atmosphere preservation space is provided in the storage container; A gas separator, the gas separator has an atmosphere-controlled membrane, a first gas collection chamber and a second gas collection chamber, the atmosphere-controlled membrane is located between the first gas collection chamber and the second gas collection chamber; The atmosphere-modifying membrane is configured such that more oxygen in the air in the first gas collection chamber passes through the atmosphere-regulating membrane and enters the second gas collection chamber than nitrogen therein; the first gas collection chamber The cavity is in controllable communication with the external space of the gas separator, so that the air in the external space of the gas separator enters the first gas collection cavity, and the first gas collection cavity is also in controllable communication with the external space of the gas separator. The controlled atmosphere fresh-keeping space is connected, so that the remaining gas from the air entering the first gas collection chamber after removing the gas that has entered the second gas collection chamber through the controlled atmosphere membrane enters the controlled atmosphere fresh-keeping space; and An air extraction pump, which is disposed on the top of the box and communicates with the second gas collection chamber via a pipeline to exhaust the gas penetrating into the second gas collection chamber to the outside of the gas separator. ; A first vent hole that can be controlled open, and the first vent hole allows air in the storage space to enter the first gas collection chamber; A second vent hole that can be controlled open, and the second vent hole allows nitrogen-rich gas to be filled from the first gas collection chamber into the controlled atmosphere preservation space; A controllably openable third vent allows oxygen-rich gas to flow out of the second gas collection chamber. 2. The refrigeration and freezing device according to claim 1, further comprising: An axial flow fan is disposed on the flow path from the first gas collection chamber to the controlled atmosphere preservation space, and is configured to be started in a controlled manner to promote the remaining gas to flow into the controlled atmosphere preservation space. 3. The refrigeration and freezing device according to claim 1, characterized in that, The storage container is a drawer assembly, including: A drawer cylinder has a forward opening and is disposed in the storage space; and The drawer body is slidably disposed in the drawer barrel so as to be operable to draw out the drawer barrel and insert the drawer barrel inwardly from the forward opening of the drawer barrel. 4. The refrigeration and freezing device according to claim 1, characterized in that, A receiving space is defined at the rear of the top end of the box to accommodate the air extraction pump. 5. The refrigeration and freezing device according to claim 4, further comprising: a refrigeration system configured to provide cooling to the storage space, and The refrigeration system has a compressor installed in the accommodation space. 6. The refrigeration and freezing device according to claim 4, further comprising: Install a top plate, which is installed on the top surface of the accommodation space through a plurality of vibration-absorbing foot pads; and a sealed box installed on the mounting top plate; and The air pump is installed in the sealed box. 7. The refrigeration and freezing device according to claim 6, characterized in that, Heat dissipation holes are provided at both lateral ends of the top wall and the rear wall of the accommodation space; The air extraction pump is arranged at one transverse end of the accommodation space. 8. The refrigeration and freezing device according to claim 4, characterized in that, The upper edge of the front wall of the accommodation space is in front of the lower edge; and The storage space includes a first space in front of the front wall of the accommodation space, and a second space below the bottom wall of the accommodation space. 9. The refrigeration and freezing device according to claim 3, characterized in that, The gas separator is installed inside the storage space and located on the rear side of the drawer cylinder. 10. The refrigeration and freezing device according to claim 1, wherein the gas separator further includes: A gas collection box is provided with a horizontally placed support frame inside it. The support frame and the upper half of the gas collection box jointly define the first gas collection chamber. The support frame and the gas collection box The lower half of the box jointly defines the second gas collection chamber; The air-conditioning membrane is arranged on the support frame.