Air pump assembly, nitrogen making device and refrigerator

Abstract

According to the air pump assembly, the nitrogen making device and the refrigerator, the air pump assembly comprises an air pump, an air pump inner box and an air pump outer box, and the air pump is used for providing compressed air for a molecular sieve in the nitrogen making device; a first closed cavity is defined by the air pump inner box, and the air pump is contained in the first closed cavity. A second closed cavity is defined by the air pump outer box, and the air pump inner box is contained in the second closed cavity; the air pump is connected and communicated with an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe penetrate through the air pump inner box and the air pump outer box. According to the air pump assembly, the double-layer box body sealing structure of the air pump inner box and the air pump outer box can be used for containing the air pump, in this way, the double noise reduction effect on noise generated in the working process of the air pump can be achieved, and the efficient sound insulation and noise reduction effect on the air pump is achieved; the use experience of a user using the nitrogen making device with the air pump assembly can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the refrigerator preservation related technical field, especially, it relates to a gas pump assembly, nitrogen making device and refrigerator. BACKGROUND

[0002] Because the food material cell has the respiratory function, and the cell will consume oxygen in the respiratory process to decompose its nutrient substance, causes the food material to rot. Therefore, usually adopts the refrigerator to carry out the food material preservation, for example, sets up the vacuum preservation room in the refrigerator box body, or improves the nitrogen concentration in the preservation room, the purpose of the two ways is in reducing the oxygen concentration in the refrigerator, inhibits the food material cell respiration, thereby effectively delays the food material rot, prolongs the preservation time.

[0003] In the PSA (Pressure Swing Adsorption, variable pressure swing adsorption) nitrogen making system of the refrigerator, the air needs to be pumped to the molecular sieve by the gas pump, the nitrogen in the air is separated and handled by the structural characteristics of the molecular sieve and discharged to the preservation drawer of the refrigerator, to achieve the purpose of nitrogen preservation. At present, the gas pump body in the existing refrigerator nitrogen making system is embedded in the refrigeration foaming layer through the gas pump box, however, the gas pump has strong noise when running, which can be transmitted to the refrigeration inner container through the gas pump box, which reduces the user experience of the nitrogen making system. UTILITY MODEL CONTENTS

[0004] Therefore, it is necessary to provide a gas pump assembly, nitrogen making device and refrigerator for solving the above technical problems.

[0005] A gas pump assembly is applied to a nitrogen making device of a refrigerator, and the gas pump assembly comprises:

[0006] A gas pump is used to provide compressed air for a molecular sieve in the nitrogen making device.

[0007] A gas pump inner box is enclosed to form a first closed chamber, and the gas pump is accommodated in the first closed chamber.

[0008] A gas pump outer box is enclosed to form a second closed chamber, and the gas pump inner box is accommodated in the second closed chamber.

[0009] The gas pump is connected and communicated with an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are arranged through the gas pump inner box and the gas pump outer box.

[0010] It can be understood that the gas pump is accommodated by using the double-layer box body sealing structure of the gas pump inner box and the gas pump outer box, which can play a double noise reduction effect on the noise generated during the operation of the gas pump, and has a high-efficiency sound insulation and noise reduction effect on the gas pump. Therefore, the user experience of the nitrogen making device with the gas pump assembly can be improved.

[0011] In one of the embodiments, a first sealing plug is mounted on the air pump inner box, and the air inlet pipe and the air outlet pipe pass through the first sealing plug to the air pump inner box;

[0012] In addition, a second sealing plug is mounted on the air pump outer box, and the air inlet pipe and the air outlet pipe pass through the second sealing plug to the air pump outer box.

[0013] It can be understood that the first sealing plug and the second sealing plug are used to seal the air inlet pipe and the air outlet pipe when they pass through the air pump inner box and the air pump outer box, preventing the transmission and diffraction of sound waves generated during the operation of the air pump from the path of the air inlet pipe and the air outlet pipe, thereby further ensuring the sound insulation and noise reduction effect of the air pump inner box and the air pump outer box on the air pump.

[0014] In one of the embodiments, the air pump inner box and the air pump are abutted and limited by a first damping pad;

[0015] In addition, the air pump inner box and the air pump outer box are abutted and limited by a second damping pad.

[0016] It can be understood that the first damping pad and / or the second damping pad can reduce the transmission of vibrations generated during the operation of the air pump, so that the air pump assembly has a good damping effect on the air pump, thereby ensuring the safety and reliability of the nitrogen generating device using the air pump assembly during long-term use in the refrigeration inner liner.

[0017] In one of the embodiments, the air pump inner box and the air pump are abutted and limited by a first damping pad; wherein the first damping pad comprises an upper damping pad and a lower damping pad, and the upper damping pad and the lower damping pad are arranged at the upper and lower ends of the air pump;

[0018] One of the upper damping pad and the air pump inner box is provided with a limiting rib, and the other is provided with a limiting gap, and the limiting rib is clamped in the limiting gap;

[0019] One of the lower damping pad and the air pump inner box is provided with a protruding column, and the other is provided with a plug hole, and the protruding column is inserted into the plug hole.

[0020] It can be understood that the upper damping pad and the lower damping pad are used to constrain and dampen the assembly of the air pump in the air pump inner box, thereby preventing the air pump from being detached from the first damping pad when the air pump assembly is tilted, dropped or turned over, so that the first damping pad can continuously and effectively dampen the air pump.

[0021] In one of the embodiments, the air pump inner box and the air pump outer box are abutted and limited by a second damping pad;

[0022] The second damping pad comprises a plurality of upper damping blocks and a plurality of lower damping blocks, the plurality of upper damping blocks are installed at the corners of one end of the inner box of the air pump, and the plurality of lower damping blocks are installed at the corners of the other end of the inner box of the air pump.

[0023] It can be understood that the assembly of the inner box of the air pump in the outer box of the air pump is constrained and damped by the plurality of upper damping blocks and the plurality of lower damping blocks, so that the inner box of the air pump is prevented from being separated from the second damping pad when the air pump assembly is tilted, dropped or turned over, thereby ensuring that the second damping pad can continuously and effectively damp the air pump.

[0024] In one embodiment, the inner box of the air pump comprises a first upper box body and a first lower box body, the first upper box body is installed on the first lower box body, and the first upper box body and the first lower box body are assembled and sealed by a first sealing ring;

[0025] And / or, the outer box of the air pump comprises a second upper box body and a second lower box body, the second upper box body is installed on the second lower box body, and the second upper box body and the second lower box body are assembled and sealed by a second sealing ring.

[0026] The application also provides a nitrogen making device, comprising a mounting plate and the air pump assembly described above;

[0027] The air pump assembly is installed on the mounting plate in a suspended manner through the outer box of the air pump, wherein the mounting plate is installed in a refrigeration inner container.

[0028] It can be understood that the air pump is suspended on the mounting plate of the refrigeration inner container through the outer box of the air pump, so that the air pump assembly does not directly contact the refrigeration foaming layer of the refrigeration inner container, and thus the setting of the outer box of the air pump does not damage the refrigeration foaming layer of the refrigeration inner container, and does not cause the refrigeration inner container to leak cold, thereby reducing the working energy consumption of the refrigerator with the nitrogen making device.

[0029] In one embodiment, a third damping pad is installed on the outer box of the air pump, and the outer box of the air pump can be installed on the mounting plate through the third damping pad.

[0030] It can be understood that the third damping pad plays a damping and buffering role in the transmission of vibration between the outer box of the air pump and the mounting plate, so that the transmission of air pump vibration to the refrigeration inner container through the inner box of the air pump, the outer box of the air pump and the mounting plate is further weakened.

[0031] In one embodiment, the nitrogen making device further comprises a molecular sieve, a mounting bracket and a fresh-keeping drawer, the molecular sieve is installed in the mounting plate and communicates with the air outlet pipe;

[0032] The mounting bracket is mounted on the mounting plate and is in sliding connection with the fresh-keeping drawer, and a fresh-keeping chamber is formed between the fresh-keeping drawer and the mounting plate, and the fresh-keeping chamber is in communication with the nitrogen outlet of the molecular sieve.

[0033] It can be understood that, since the nitrogen generating device is assembled based on the box body, the modular design of the nitrogen generating device can be realized, so that the nitrogen generating device can be independently produced and assembled in the cold storage liner at one time. Therefore, the structure of the nitrogen generating device can be simplified, the production and assembly efficiency of the nitrogen generating device in the refrigerator can be improved, the cost can be reduced, the leakage point during operation of the nitrogen generating device can be reduced, and the vibration transmission to the cold storage liner can be weakened, and the safety and reliability of the nitrogen generating device and the cold storage liner of the refrigerator after long-term use can be improved.

[0034] In addition, the application also provides a refrigerator comprising a cold storage liner and the above-mentioned nitrogen generating device.

[0035] The nitrogen generating device is installed in the cold storage liner.

[0036] Compared with the prior art, the application has the following advantages due to the application of the above technical solutions:

[0037] The gas pump assembly, the nitrogen generating device and the refrigerator claimed in the application use the double-layer box body sealing structure of the inner box and the outer box of the gas pump to accommodate the gas pump, which can play a double noise reduction role on the noise generated during the operation of the gas pump, and has a high-efficiency sound insulation and noise reduction effect on the gas pump. Therefore, the user experience of the nitrogen generating device using the gas pump assembly can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 The structure diagram of the gas pump assembly provided by the application.

[0040] Figure 2 The sectional view of the gas pump assembly provided by the application.

[0041] Figure 3 The partial structure diagram of the gas pump assembly provided by the application.

[0042] Figure 4A sectional view of the air pump when assembled in the inner box of the air pump in the present application.

[0043] Figure 5 A structural schematic view of the air pump and the first damping pad when assembled in the present application.

[0044] Figure 6 A structural schematic view of the upper damping block in the present application.

[0045] Figure 7 A structural schematic view of the air pump assembly when assembled on the mounting plate in the present application.

[0046] Figure 8 A structural schematic view of the molecular sieve when assembled in the mounting plate in the present application.

[0047] Figure 9 A structural schematic view of the refrigerator provided in the present application.

[0048] Figure 10 A partial structural schematic view of the refrigerator provided in the present application.

[0049] Fig. 1000, nitrogen production device; 100, air pump assembly; 101, first closed chamber; 102, second closed chamber; 10, air pump; 11, air inlet pipe; 12, air outlet pipe; 20, air pump inner box; 210, first sealing plug; 220, limiting rib; 230, plug hole; 240, protruding buckle; 21, first upper box body; 22, first lower box body; 23, first sealing ring; 24, screw; 30, air pump outer box; 310, second sealing plug; 31, second upper box body; 32, second lower box body; 33, second sealing ring; 34, connecting lug; 40, first damping pad; 41, upper damping pad; 411, limiting notch; 42, lower damping pad; 421, protruding column; 50, second damping pad; 51, upper damping block; 511, connecting body; 512, damping box body; 513, connecting rib; 52, lower damping block; 60, third damping pad; 200, mounting plate; 201, mounting main plate; 202, cover plate; 300, molecular sieve; 301, nitrogen outlet; 400, mounting bracket; 500, fresh-keeping drawer; 2000, refrigeration inner container. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] It is to be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In cases where one element is referred to as being "a" or "an" other element, it is contended that there can be one or more such elements present, and there can also be other intervening elements present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, figures and other references mentioned herein are incorporated by reference in their entirety for the teachings relevant to the sentence and / or paragraph in which the reference is presented.

[0053] The gas pump assembly 100 claimed in the present application is applied to the refrigerator nitrogen making device 1000.

[0054] As shown in Figures 1 to 4 The gas pump assembly 100 provided by an embodiment of the present application includes a gas pump 10, a gas pump inner box 20 and a gas pump outer box 30. The gas pump 10 is used to provide compressed air for a molecular sieve 300 in the nitrogen making device 1000. The gas pump inner box 20 is enclosed to form a first closed chamber 101, and the gas pump 10 is accommodated in the first closed chamber 101. The gas pump outer box 30 is enclosed to form a second closed chamber 102, and the gas pump inner box 20 is accommodated in the second closed chamber 102. The gas pump 10 is connected and communicated with an air inlet pipe 11 and an air outlet pipe 12, and the air inlet pipe 11 and the air outlet pipe 12 are arranged through the gas pump inner box 20 and the gas pump outer box 30. Here, the pressure value of the compressed air provided by the gas pump 10 for the molecular sieve 300 is adapted to the pressure value required for the operation of the molecular sieve 300, and the molecular sieve 300 is specifically a tower type molecular sieve.

[0055] As can be seen from the above, the gas pump assembly 100 of the present application can accommodate the gas pump 10 by using the double-layer box body sealing structure of the gas pump inner box 20 and the gas pump outer box 30, which can play a double noise reduction role on the noise generated during the operation of the gas pump 10, and has a high-efficiency sound insulation and noise reduction effect on the gas pump 10. In this way, the user experience of the nitrogen making device 1000 using the gas pump assembly 100 can be improved.

[0056] It should be noted that when the sound wave propagates in the air, it encounters a solid material with a certain sound insulation effect. The higher the area density of the solid material, the better the sound insulation effect. For example, a completely closed box can reduce noise by about 10db, and a metal box with a larger density such as iron and copper can reduce noise by about 15db. The double-box nested structure of the inner box 20 and the outer box 30 of the air pump can superimpose the noise reduction effect on the air pump 10, and the noise of the air pump 10 can be reduced to about 40db.

[0057] As shown in Figures 2 to 4 , in an embodiment, the first sealing plug 210 is installed on the inner box 20 of the air pump, and the air inlet pipe 11 and the air outlet pipe 12 pass through the first sealing plug 210 to the outer box 30 of the air pump. That is, the air pump assembly 100 of this embodiment can use the first sealing plug 210 and the second sealing plug 310 to seal the air inlet pipe 11 and the air outlet pipe 12 when they pass through the inner box 20 and the outer box 30 of the air pump, preventing the possibility of transmission and diffraction of sound waves generated when the air pump 10 is working from the path of the air inlet pipe 11 and the air outlet pipe 12. This can further ensure the sound insulation and noise reduction effect of the inner box 20 and the outer box 30 of the air pump on the air pump 10. Here, the air inlet pipe 11 and the air outlet pipe 12 can pass through the same first sealing plug 210 and second sealing plug 310 in turn to extend outward.

[0058] As shown in Figure 2 , Figure 4 , in an embodiment, the inner box 20 of the air pump includes a first upper box 21 and a first lower box 22, the first upper box 21 is installed on the first lower box 22, and the first upper box 21 and the first lower box 22 are assembled and sealed by the first sealing ring 23. That is, the first upper box 21 and the first lower box 22 of the air pump 10 can form the above-mentioned first closed chamber 101, which can meet the assembly connection of the air pump 10 in the inner box 20 of the air pump. Here, the first upper box 21 and the first lower box 22 can be configured as an upper and lower box structure, and can be assembled and connected by screws 24.

[0059] Similarly, as shown in Figure 1 , Figure 2 , the outer box 30 of the air pump includes a second upper box 31 and a second lower box 32, the second upper box 31 is installed on the second lower box 32, and the second upper box 31 and the second lower box 32 are assembled and sealed by the second sealing ring 33.

[0060] As shown in Figure 2 , Figure 4 and Figure 5As shown in the figure, in an embodiment, the first damping pad 40 is arranged between the air pump inner box 20 and the air pump 10 to limit the abutment, so that the vibration generated during the operation of the air pump 10 is transmitted to the air pump inner box 20 through the first damping pad 40, and the air pump 10 plays a role of primary damping.

[0061] As shown in the figure, Figure 2 , Figure 4 and Figure 5 , in this embodiment, the first damping pad 40 includes an upper damping pad 41 and a lower damping pad 42, which are arranged at the upper and lower ends of the air pump 10 and can be installed at the upper and lower ends of the air pump 10 in a sleeved manner.

[0062] As shown in the figure, Figure 2 , Figure 4 and Figure 5 , in this embodiment, one of the upper damping pad 41 and the air pump inner box 20 is provided with a limiting rib 220, and the other is provided with a limiting gap 411. The limiting rib 220 is clamped at the limiting gap 411, so that the assembly of the upper damping pad 41 and the air pump inner box 20 is limited. In this way, the air pump assembly 100 can be prevented from being separated from the upper damping pad 41 when it is tilted, dropped or turned over, so that the upper damping pad 41 can continuously play a role of damping for the air pump 10. Here, the limiting rib 220 is arranged on the air pump inner box 20 and connected with the air pump inner box 20 as a whole, and the limiting gap 411 is arranged on the upper damping pad 41. The number of limiting ribs 220 is two. It can be understood that in other embodiments, the limiting rib can also be arranged on the upper damping pad 41, and the limiting gap can be arranged on the air pump inner box 20, which will not be described here.

[0063] As shown in the figure, Figure 2 , Figure 4 and Figure 5 , in this embodiment, one of the lower damping pad 42 and the air pump inner box 20 is provided with a protruding column 421, and the other is provided with a plug-in hole 230. The protruding column 421 is arranged in the plug-in hole 230, so that the assembly of the lower damping pad 42 and the air pump inner box 20 is limited. In this way, the air pump assembly 100 can be prevented from being separated from the lower damping pad 42 when it is tilted, dropped or turned over, so that the lower damping pad 42 can continuously play a role of damping for the air pump 10. Here, the plug-in hole 230 is arranged on the air pump inner box 20, and the protruding column 421 is arranged on the lower damping pad 42. The number of protruding columns 421 is two rows, and the number of protruding columns 421 in each row is three. It can be understood that in other embodiments, the protruding column can also be arranged on the air pump inner box 20, and the plug-in hole can be arranged on the lower damping pad 42, which will not be described here.

[0064] As shown in the figure, Figure 2、 Figure 3 As shown in the figure, in an embodiment, the second damping pad 50 is arranged between the inner box 20 and the outer box 30 of the air pump 10 to limit the abutment therebetween, so that the vibration of the inner box 20 of the air pump 10 during the operation of the air pump 10 is transmitted to the outer box 30 of the air pump 10 through the second damping pad 50, and the air pump 10 plays a role of secondary damping.

[0065] As shown in the figure, Figure 2 、 Figure 3 As shown in the figure, in this embodiment, the second damping pad 50 includes a plurality of upper damping blocks 51 and a plurality of lower damping blocks 52, the plurality of upper damping blocks 51 are correspondingly arranged at the corners of one end of the inner box 20, and the plurality of lower damping blocks 52 are correspondingly arranged at the corners of the other end of the inner box 20. In this way, it can be prevented that the inner box 20 of the air pump assembly 100 is separated from the second damping pad 50 when the air pump assembly 100 is tilted, dropped or overturned, so that the second damping pad 50 can ensure the continuous and effective damping effect on the air pump 10. Here, the number of the upper damping blocks 51 and the lower damping blocks 52 is four, and each is arranged at the four corners of the top and the bottom of the inner box 20. It can be understood that in other embodiments, the number of the upper damping blocks 51 and the lower damping blocks 52 in the second damping pad 50 can also be configured as two, three, five or even more, and can be arranged diagonally on the inner box 20, which will not be described here.

[0066] As shown in the figure, Figure 6 As shown in the figure, in this embodiment, the upper damping block 51 includes a connecting body 511, a damping box body 512 and four connecting rib strips 513, the four connecting rib strips 513 are symmetrically arranged between the connecting body 511 and the damping box body 512, and are connected with the connecting body 511 and the damping box body 512 as a whole; wherein the connecting body 511 is arranged at one corner position of the inner box 20, and the connecting body 511 can be attached to the three end faces of the corresponding corner of the inner box 20 and is connected with the corresponding protruding buckle 240 of the inner box 20 in a clamping manner. So that the upper damping block 51 can abut and limit the outer box 30 of the air pump 10 with the damping box body 512, and utilize the elastic deformation of the four connecting rib strips 513 and the damping box body 512 to realize the buffering when the vibration of the inner box 20 of the air pump 10 is transmitted to the outer box 30 of the air pump 10. Here, the structure of the lower damping block 52 is the same as that of the upper damping block 51, which will not be described here.

[0067] As shown in the figure, Figure 7As shown, this application also provides a nitrogen generator 1000, including a mounting plate 200 and the aforementioned air pump assembly 100; the air pump assembly 100 is suspended on the mounting plate 200 via an air pump outer casing 30, wherein the mounting plate 200 is installed inside the refrigerator inner liner 2000. This prevents the air pump assembly 100 from directly contacting the refrigerator foam layer (not shown), thus ensuring that the air pump outer casing 30 does not damage the refrigerator foam layer of the refrigerator inner liner 2000 and prevents cold air leakage from the refrigerator inner liner 2000.

[0068] like Figure 1 , Figure 7 As shown, in one embodiment, a third vibration damping pad 60 is installed on the air pump outer box 30, allowing the air pump outer box 30 to be mounted on the mounting plate 200 via the third vibration damping pad 60. This utilizes the structural characteristics of the third vibration damping pad 60 to dampen and buffer the vibration transmission between the air pump outer box 30 and the mounting plate 200, further reducing the transmission of air pump 10 vibration to the refrigerator inner liner 2000 via the air pump inner box 20, the air pump outer box 30, and the mounting plate 200. Here, two third vibration damping pads 60 are configured, arranged on both sides of the air pump outer box 30 and mounted in a fitted manner on the connecting lugs 34 of the air pump outer box 30.

[0069] like Figures 7 to 10 As shown, in one embodiment, the nitrogen generator 1000 further includes a molecular sieve 300, a mounting bracket 400, and a preservation drawer 500. The molecular sieve 300 is installed inside the mounting plate 200 and communicates with the gas outlet pipe 12. The mounting bracket 400 is installed on the mounting plate 200 and is slidably connected to the preservation drawer 500. The preservation drawer 500 and the mounting plate 200 can be enclosed to form a preservation chamber, which is communicated with the nitrogen outlet 301 of the molecular sieve 300. This modular design allows for the independent manufacture of the nitrogen generator 1000, enabling it to be assembled entirely within the refrigerator liner 2000. This simplifies the structure of the nitrogen generator 1000, improves its production efficiency and assembly efficiency in the refrigerator, thus reducing costs. Furthermore, it reduces potential leaks during operation and weakens vibration transmission to the refrigerator liner 2000, enhancing the safety and reliability of both the nitrogen generator 1000 and the refrigerator liner 2000 over long-term use. Here, the mounting plate 200 includes a main mounting plate 201 and a cover plate 202 that fits onto the main mounting plate 201, wherein the molecular sieve 300 is mounted on the main mounting plate 201.

[0070] like Figure 9As shown, the application also provides a refrigerator, comprising a refrigeration liner 2000, and the nitrogen making device 1000 described above; the nitrogen making device 1000 is installed in the refrigeration liner 2000.

[0071] The technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0072] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation of the present application, and as long as the above embodiments are within the spirit and scope of the present application, any appropriate changes and variations are within the scope of the present application.

Claims

1. A gas pump assembly applied to a nitrogen generating device (1000) of a refrigerator, characterized in that, The air pump assembly (100) comprises: an air pump (10) for providing compressed air to the molecular sieve (300) in the nitrogen generating device (1000); an air pump inner box (20) enclosing a first sealed chamber (101), wherein the air pump (10) is accommodated in the first sealed chamber (101); an air pump outer box (30) enclosing a second sealed chamber (102), wherein the air pump inner box (20) is accommodated in the second sealed chamber (102); wherein the air pump (10) is connected and communicated with an air inlet pipe (11) and an air outlet pipe (12), and the air inlet pipe (11) and the air outlet pipe (12) are arranged through the air pump inner box (20) and the air pump outer box (30).

2. The gas pump assembly of claim 1, wherein, The air pump inner box (20) is provided with a first sealing plug (210), and the air inlet pipe (11) and the air outlet pipe (12) pass through the first sealing plug (210) and extend out of the air pump inner box (20); and the air pump outer box (30) is provided with a second sealing plug (310), and the air inlet pipe (11) and the air outlet pipe (12) pass through the second sealing plug (310) and extend out of the air pump outer box (30).

3. The air pump assembly of claim 1, wherein, The air pump inner box (20) and the air pump (10) are abutted and limited by a first damping pad (40); and / or, the air pump inner box (20) and the air pump outer box (30) are abutted and limited by a second damping pad (50).

4. The gas pump assembly of claim 1, wherein, The air pump inner box (20) and the air pump (10) are abutted and limited by a first damping pad (40); wherein the first damping pad (40) comprises an upper damping pad (41) and a lower damping pad (42), and the upper damping pad (41) and the lower damping pad (42) are arranged at the upper and lower ends of the air pump (10); one of the upper damping pad (41) and the air pump inner box (20) is provided with a limiting rib (220), and the other is provided with a limiting gap (411), and the limiting rib (220) is clamped at the limiting gap (411); one of the lower damping pad (42) and the air pump inner box (20) is provided with a protruding column (421), and the other is provided with a plug hole (230), and the protruding column (421) is inserted into the plug hole (230).

5. The gas pump assembly of claim 1, wherein, The air pump inner box (20) and the air pump outer box (30) are abutted and limited by a second damping pad (50); wherein the second damping pad (50) comprises a plurality of upper damping blocks (51) and a plurality of lower damping blocks (52), and the plurality of upper damping blocks (51) are correspondingly arranged at the corners of one end of the air pump inner box (20), and the plurality of lower damping blocks (52) are correspondingly arranged at the corners of the other end of the air pump inner box (20).

6. The gas pump assembly of claim 1, wherein, The air pump inner box (20) comprises a first upper box body (21) and a first lower box body (22), the first upper box body (21) is arranged on the first lower box body (22), and the first upper box body (21) and the first lower box body (22) are assembled and sealed by a first sealing ring (23); And / or, the air pump outer box (30) comprises a second upper box body (31) and a second lower box body (32), the second upper box body (31) is installed on the second lower box body (32), and the second upper box body (31) and the second lower box body (32) are assembled and sealed by a second sealing ring (33).

7. A nitrogen generation plant characterized in that, The air pump assembly (100) according to any one of claims 1-6 is installed on the mounting plate (200) in a suspended manner through the air pump outer box (30), wherein the mounting plate (200) is installed in a refrigeration inner container (2000). The air pump assembly (100) is installed on the mounting plate (200) in a suspended manner through the air pump outer box (30), wherein the mounting plate (200) is installed in a refrigeration inner container (2000).

8. The nitrogen generating plant of claim 7, wherein The air pump outer box (30) is provided with a third damping pad (60), and the air pump outer box (30) is installed on the mounting plate (200) through the third damping pad (60).

9. The nitrogen generating plant of claim 7, wherein The nitrogen making device (1000) further comprises a molecular sieve (300), a mounting bracket (400) and a fresh-keeping drawer (500), the molecular sieve (300) is installed in the mounting plate (200) and communicates with the air outlet pipe (12); The mounting bracket (400) is installed on the mounting plate (200) and is in sliding connection with the fresh-keeping drawer (500), and a fresh-keeping chamber can be formed between the fresh-keeping drawer (500) and the mounting plate (200), the fresh-keeping chamber communicates with a nitrogen outlet (301) of the molecular sieve (300).

10. A refrigerator characterized by comprising: The nitrogen making device (1000) according to any one of claims 7-9 is installed in a refrigeration inner container (2000). The nitrogen making device (1000) is installed in the refrigeration inner container (2000).

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