Vacuum pump module and refrigerator

Abstract

This application provides a vacuum pump module and a refrigerator. The vacuum pump module includes a sealing box, a pump body, a vibration damping assembly, an exhaust pipe, and a silencer. The sealing box is installed on a pressure-bearing shell, and a first mounting groove, a second mounting groove, and a first connector are provided on the inner side of the sealing box. The pump body has an exhaust port. The vibration damping assembly includes a vibration damping sleeve and a mounting plate. The vibration damping sleeve is fitted over the outside of the pump body, and the mounting plate is installed at the opening of the first mounting groove, pressing the vibration damping sleeve and the pump body into the first mounting groove. The exhaust pipe connects the exhaust port and the first connector. The silencer is installed in the second mounting groove and is located on the exhaust pipe. The vacuum pump module of this application reduces the airflow noise emitted by the vacuum pump during exhaust by installing a silencer on the exhaust pipe; and by fitting a vibration damping sleeve over the outside of the pump body, it isolates the pump body from the pressure-bearing shell, thereby preventing vibration from being transmitted to the entire machine and causing resonance.

Description

Technical Field

[0001] This application relates to the technical field of refrigerators, and particularly to a vacuum pump module and a refrigerator having the vacuum pump module. Background Technology

[0002] Refrigerators, as an indispensable household appliance in modern homes, play a vital role in food preservation and storage. With technological advancements, refrigerator functions have been continuously enriched and improved to meet users' needs for food preservation, storage, and other aspects.

[0003] A vacuum drawer refrigerator is a high-end refrigerator with an additional "vacuum-sealed preservation compartment" in the refrigerator compartment. By continuously or intermittently reducing the air pressure inside the drawer to 0.7–0.8 atm, bacteria and oxidation are inhibited, thereby extending the shelf life of food.

[0004] While achieving efficient food preservation, the noise and vibration of the vacuum system in vacuum drawer refrigerators have always been technical challenges. Existing vacuum preservation drawers generally rely on external or internal vacuum pumps for air extraction, which can easily cause airflow noise and mechanical vibration during operation, thus affecting the user experience. Utility Model Content

[0005] This application provides a vacuum pump module and a refrigerator, which can solve the problems of airflow noise and mechanical vibration caused by the operation of a vacuum system.

[0006] In the first aspect, this application provides a vacuum pump module for use in a refrigerator. The refrigerator has a pressure-bearing outer shell for installing the vacuum pump module. The vacuum pump module includes a sealing box, a pump body, a vibration damping component, an air outlet pipe, and a silencer.

[0007] A sealing box is installed on a pressure-bearing outer shell. The inner side of the sealing box has a first mounting groove, a second mounting groove, and a first connector. The pump body has an air outlet. The vibration damping assembly includes a damping sleeve and a mounting plate. The damping sleeve is fitted over the outside of the pump body, and the mounting plate is installed at the opening of the first mounting groove, pressing the damping sleeve and the pump body into the first mounting groove. An air outlet pipe connects the air outlet and the first connector. A silencer is installed in the second mounting groove and is located on the air outlet pipe.

[0008] The beneficial effects of the vacuum pump module provided in this application are as follows: the vibration damping sleeve is fitted outside the pump body, allowing it to absorb high-frequency vibrations during pump operation and convert mechanical energy into heat dissipation; the mounting plate presses the vibration damping sleeve and pump body into the first mounting groove, providing continuous pre-tightening damping and weakening residual amplitude; the sealing box encloses the entire unit, blocking the transmission path of the vibration source to the refrigerator cabinet, ensuring stable operation of the entire unit. The silencer is located on the exhaust pipe. After the airflow drawn from the pump body enters the silencer, it undergoes pressure reduction, expansion chamber reflection interference, and other effects, causing the airflow sound waves to cancel each other out, thereby attenuating exhaust noise and achieving noise reduction. When the vacuum pump module provided in this application is applied to a refrigerator, it eliminates the risk of resonance, reduces noise simultaneously, and significantly improves the quietness experience at night; furthermore, the vibration damping and noise reduction structures in this module are arranged in the same box, with no excessive exposed pipelines, saving space and significantly reducing manufacturing and maintenance complexity.

[0009] In one possible design, the sealing box is provided with mounting holes; the mounting plate has a first through hole;

[0010] A connecting plate is provided on the outer side of the vibration damping sleeve. The connecting plate has a second through hole. Fasteners pass through the first through hole and the second through hole in sequence to connect with the mounting hole.

[0011] The above technical solution has the following advantages or beneficial effects: by using fasteners such as screws to pass through the first through hole, the second through hole and the mounting hole to lock together, the four parts of the mounting plate, vibration damping sleeve, pump body and sealing box are connected into one unit, so that positioning, pre-pressurization and vibration damping are completed simultaneously, the assembly is seamless, the replacement can be done in one step, and the modularity is high.

[0012] In one possible design, the sealing box has multiple spaced reinforcing ribs, each reinforcing rib having an arc-shaped groove, and the multiple arc-shaped grooves forming a first mounting groove; the mounting plate has a limit groove on the side facing the vibration damping sleeve;

[0013] The outer side of the vibration damping sleeve is provided with an annular positioning part, which is inserted into the gap between two adjacent reinforcing ribs and into the limiting groove.

[0014] The above technical solution has the following advantages or beneficial effects: the first mounting groove is formed by the arc-shaped groove on the reinforcing rib, which can form a continuous and circumferential support surface, so that the damping sleeve can be in uniform contact with the groove wall of the first mounting groove; the stiffness of the reinforcing rib suppresses the deformation of the sealing box, which can avoid the appearance of local hard spots in the first mounting groove, ensure that the damping sleeve is always in a uniform compression state, and improve the consistency and durability of the damping effect.

[0015] In addition, the annular positioning part is embedded in the gap of the reinforcing rib and inserted into the limiting groove to achieve radial and axial dual positioning, prevent the damping sleeve from slipping and rotating, improve the overall rigidity and damping consistency, and make assembly and disassembly quick and stable.

[0016] In one possible design, the silencer has an inlet connector and an outlet connector;

[0017] The exhaust pipe includes:

[0018] The first sub-pipe is connected to the air outlet at one end and to the inlet connector at the other end.

[0019] The second sub-pipeline is connected at one end to the outlet connector and at the other end to the first connector;

[0020] The sealing box has a support plate for enclosing and forming a second mounting groove, and the support plate has U-shaped notches on opposite sides;

[0021] The first sub-pipe and inlet connector are engaged in one of the two U-shaped notches, and the second sub-pipe and outlet connector are engaged in the other of the two U-shaped notches.

[0022] The above technical solution has the following advantages or beneficial effects: The support plate forms a second mounting groove, and the symmetrical U-shaped notches on both sides form a quick-locking channel: the inlet joint of the first sub-pipe and the silencer, and the outlet joint of the second sub-pipe and the silencer are respectively locked into the U-shaped notches, so that the silencer is clamped in the second mounting groove by the side wall of the U-shaped notch through the pipe, which can prevent the silencer from rotating circumferentially and maintain the airtightness of the silencer joint; during disassembly and assembly, it is only necessary to push the pipe in or pull out the pipe laterally, which significantly improves the assembly efficiency and maintenance convenience between the silencer and the pipe.

[0023] In one possible design, the inlet connector, outlet connector, exhaust pipe, and U-shaped notch satisfy the following relationship:

[0024] 5%C < 1 / 2B1 + C - 1 / 2A < 20%C;

[0025] 5%C < 1 / 2B2 + C - 1 / 2A < 20%C;

[0026] Where A is the width of the U-shaped notch, B1 is the outer diameter of the inlet connector, B2 is the outer diameter of the outlet connector, and C is the wall thickness of the outlet pipe.

[0027] The above technical solution has the following advantages or beneficial effects: the dimensional relationship limits the U-shaped notch width A, the inlet connector outer diameter B1, the outlet connector outer diameter B2, and the pipe wall thickness C to a slight interference range of 5%C–20%C, so that the connector is elastically pre-tightened after being pressed into the notch: it can compensate for manufacturing tolerances to ensure smooth assembly, and form a radial clamping force to prevent axial movement and rotation. At the same time, it avoids excessive extrusion that could lead to pipe wall deformation or airtightness failure, thus achieving a combination of quick clamping, reliable positioning, and durable sealing.

[0028] In one possible design, a second connector is provided on the outside of the sealing box, and a third connector is provided on the inside opposite to the second connector; the pump body has an air intake port.

[0029] The vacuum pump module also includes:

[0030] The air extraction pipeline includes:

[0031] The third sub-pipeline is connected at one end to the pressure-bearing shell and at the other end to the second connector;

[0032] The fourth sub-pipe is connected at one end to the third connector and at the other end to the air extraction port.

[0033] The above technical solution has the following advantages or beneficial effects: the second and third connectors are positioned opposite each other, and the air extraction pipeline is connected to the sealing box in sections via the third and fourth sub-pipes; the air extraction path is partially covered by the sealing box, isolating external condensation and oil stains, and reducing intake noise; the modular plug-and-play structure of the connectors and sub-pipes enables quick connection between the pump body and the pressure-bearing shell, and no additional sealant is required for disassembly and assembly. During maintenance, the third sub-pipe can be pulled out of the pressure-bearing shell, making operation convenient.

[0034] In one possible design, the muffler has an expansion chamber and includes:

[0035] The silencer consists of two semi-shell structures, each shaped like a barrel, joined together along the axial direction of the silencer.

[0036] The above technical solution has the following advantages or beneficial effects: by abruptly changing the cross-sectional area of ​​the expanded chamber, sound waves are partially reflected at impedance discontinuities, weakening the energy propagating forward. The two barrel-shaped halves can be axially fastened to form a complete expanded chamber; after disassembly, the internal flow channels are directly exposed, facilitating cleaning and significantly improving maintenance efficiency.

[0037] In one possible design, the muffler has multiple expansion chambers of unequal volume, and the muffler includes:

[0038] The two half-shell structures each have an end panel, an arc-shaped plate, and multiple partition plates. The end panel is located at one end of the arc-shaped plate, and the multiple partition plates are spaced apart on the concave arc surface of the arc-shaped plate. Each partition plate has a U-shaped groove. The two half-shell structures are spliced ​​together along the radial direction of the muffler. The U-shaped grooves of the two partition plates of the two half-shell structures enclose each other to form a through hole for airflow.

[0039] The above technical solution has the following advantages or beneficial effects: After the gas discharged from the pump body enters through the inlet joint of the silencer, the air pressure decreases and the flow velocity decreases due to the sudden expansion of the pipe diameter. When the air passes through the partition plate, some of the air is blocked, and at the same time, the sound waves are reflected in the expansion chamber, consuming sound energy. The natural frequencies of each expansion chamber are different, so after multi-stage resonant reflection, the sound power of each octave band can be reduced.

[0040] In one possible design, a groove is provided on the side of the sealed box that contacts the pressure-bearing outer shell, and a sealing ring is provided in the groove;

[0041] The sealing ring is provided with an auxiliary disassembly block for removing the sealing ring, and the sealing box is provided with an insertion groove that engages with the auxiliary disassembly block;

[0042] The auxiliary disassembly block has a cable tray to allow the power cable of the pump body to pass through.

[0043] The above technical solution has the following advantages or beneficial effects: the sealing ring in the groove is pressed against the pressure-bearing outer shell by the sealing box to form a compression seal; the auxiliary disassembly block is embedded in the insertion groove, which not only acts as a positioning wedge for the sealing ring, but also provides a handle for gripping. When maintenance is required, the sealing ring can be lifted by simply pulling out the disassembly block, without the need for sharp tools, thus preventing scratches on the sealing ring; the wire groove allows the power cord to pass through along a fixed path, preventing the sealing ring from being lifted up by the cable and failing, ensuring complete sealing, quick disassembly and assembly, and safe wiring.

[0044] Secondly, this application also provides a refrigerator, comprising:

[0045] The enclosure has a pressure-bearing outer shell inside.

[0046] The vacuum pump module of any of the above is mounted in a sealed box on a pressure-bearing housing.

[0047] The refrigerator provided in this application, since it includes the aforementioned vacuum pump module, also has the corresponding technical effects, which will not be elaborated here. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the refrigerator provided in an embodiment of this application;

[0050] Figure 2This is a schematic diagram of the sealing door and pressure-bearing outer shell provided in the embodiments of this application;

[0051] Figure 3 yes Figure 2 A schematic diagram of the sealed door and pressure-bearing outer shell from another perspective;

[0052] Figure 4 This is a front view of the vacuum pump module provided in the embodiment of this application;

[0053] Figure 5 This is a schematic diagram of the back of the vacuum pump module provided in the embodiments of this application;

[0054] Figure 6 This is a schematic diagram illustrating the sealing box provided in this application;

[0055] Figure 7 This is an exploded view of the vacuum pump module provided in this application.

[0056] Figure 8 This is an exploded view of the sealing box, pump body, and vibration damping assembly provided in the embodiments of this application;

[0057] Figure 9 yes Figure 8 Assembly diagram of the central sealing box, pump body, and vibration damping components;

[0058] Figure 10 yes Figure 8 A schematic diagram of the mounting plate from another perspective;

[0059] Figure 11 This is an exploded view of the pump body, air outlet pipe, air extraction pipe, and silencer provided in the embodiments of this application;

[0060] Figure 12 yes Figure 11 A schematic diagram showing the pump body, air outlet pipe, air extraction pipe, and silencer assembled into a sealed box.

[0061] Figure 13 This is a cross-sectional view of the second sub-pipeline provided in an embodiment of this application;

[0062] Figure 14 This is a schematic diagram of an example of a muffler provided in an embodiment of this application;

[0063] Figure 15 yes Figure 14 A cross-sectional view of the muffler in the image;

[0064] Figure 16 This is a schematic diagram of another example of the silencer provided in the embodiments of this application;

[0065] Figure 17 yes Figure 16 Exploded view of the muffler in the image;

[0066] Figure 18 yes Figure 16 A cross-sectional view of the muffler in the image;

[0067] Figure 19 This is an exploded view of the sealing box and sealing ring provided in the embodiments of this application.

[0068] Figure label:

[0069] 10. Sealing box; 11. First mounting groove; 12. Second mounting groove; 13. First connector; 14. Reinforcing rib; 141. Arc groove; 15. Mounting hole; 16. Support plate; 161. U-shaped notch; 17. Second connector; 18. Third connector; 19. Groove; 10a. Insertion groove;

[0070] 20. Pump body; 21. Air outlet; 22. Air suction port; 23. Power cord;

[0071] 30. Exhaust pipe; 31. First sub-pipe; 32. Second sub-pipe;

[0072] 40. Vibration damping component; 41. Vibration damping sleeve; 411. Annular positioning part; 412. Connecting plate; 413. Second through hole; 42. Mounting plate; 421. Limiting groove; 422. First through hole;

[0073] 50. Silencer; 51. Inlet connector; 52. Outlet connector; 53. Expansion chamber; 54. Semi-shell structure; 541. End panel; 542. Arc plate; 543. Partition plate; 544. U-shaped groove; 545. Through hole;

[0074] 60. Extraction line; 61. Third sub-line; 62. Fourth sub-line;

[0075] 70. Sealing ring; 71. Auxiliary disassembly block; 711. Cable guide groove;

[0076] 80. Fasteners;

[0077] 100. Vacuum pump module; 200. Cabinet; 201. Refrigeration compartment; 202. Pressure-bearing outer shell; 203. Cabinet door; 204. Sealed door. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0079] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0080] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of this application, it should be understood that the terms "inner," "outer," "upper," "bottom," "front," and "rear," etc., indicate the orientation or positional relationship (if any) based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0082] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0083] Refrigerators, as an indispensable household appliance in modern homes, play a vital role in food preservation and storage. With technological advancements, refrigerator functions have been continuously enriched and improved to meet users' needs for food preservation, storage, and other aspects.

[0084] A vacuum drawer refrigerator is a high-end refrigerator with an additional "vacuum-sealed preservation compartment" in the refrigerator compartment. By continuously or intermittently reducing the air pressure inside the drawer to 0.7–0.8 atm, bacteria and oxidation are inhibited, thereby extending the shelf life of food.

[0085] While achieving efficient preservation, the noise and vibration of the vacuum system in vacuum drawer refrigerators have always been technical challenges. Current vacuum preservation drawers generally rely on external or internal vacuum pumps for air extraction, which can easily cause airflow noise and mechanical vibration during operation, thus affecting the user experience. Specifically, airflow noise originates from the high-speed pulsation and turbulence of the vacuum pump during exhaust; mechanical vibration arises from the rigid path from the pump body to the pressure-bearing outer shell, amplifying the vibration and transmitting it throughout the entire unit, thus triggering structural resonance.

[0086] In view of this, in order to solve the above-mentioned technical problems, this application provides a vacuum pump module and a refrigerator. By installing a silencer on the exhaust pipe, the airflow noise emitted by the vacuum pump during exhaust is reduced; by installing a vibration damping sleeve on the outside of the pump body, the pump body is isolated from the pressure-bearing shell, thereby preventing vibration from being transmitted to the whole machine and causing resonance.

[0087] Figure 1 This is a schematic diagram of a refrigerator provided in an embodiment of this application. Figure 2 This is a schematic diagram of the sealing door 204 and the pressure-bearing outer shell 202 provided in the embodiments of this application.

[0088] like Figure 1 As shown, this application embodiment first provides a refrigerator, including a cabinet 200, a refrigerator compartment 201 and a freezer compartment are provided inside the cabinet 200, a door 203 is hinged to the side wall of the cabinet 200, and an area for accommodating a vacuum drawer is provided inside the refrigerator compartment 201 of the cabinet 200. Figure 2 As shown, the vacuum drawer includes a drawer (not shown in the figure), a sealing door 204, and a pressure-bearing outer shell 202. The sealing door 204 and the pressure-bearing outer shell 202 together enclose a sealed space, which contains the drawer. When the user pulls the sealing door 204, the drawer in the sealed space will be pulled out.

[0089] Figure 3 yes Figure 2 A schematic diagram of the sealing door 204 and the pressure-bearing housing 202 from another perspective.

[0090] like Figure 3 As shown, a vacuum pump module 100 is installed on the back side of the pressure-bearing outer shell 202. The vacuum pump module 100 is installed on the pressure-bearing outer shell 202 with a sealing box 10. When the vacuum pump module 100 is working, it will evacuate the sealed space formed by the sealing door 204 and the pressure-bearing outer shell 202, thereby extending the shelf life of the food in the drawer.

[0091] The vacuum pump module 100 provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0092] Figure 4 This is a front view of the vacuum pump module 100 provided in the embodiments of this application. Figure 5 This is a schematic diagram of the back of the vacuum pump module 100 provided in the embodiments of this application. Figure 6 This is a schematic diagram of the sealed box 10 provided in this application. Figure 7 This is an exploded view of the vacuum pump module 100 provided in this application.

[0093] like Figures 4-7 As shown in the figure, an embodiment of this application provides a vacuum pump module 100, which includes a sealing box 10, a pump body 20, an outlet pipe 30, a vibration damping component 40, and a silencer 50. Additionally, the vacuum pump module 100 may also include an extraction pipe 60, which will be described in detail in the following embodiments.

[0094] The sealing box 10 is installed on the pressure-bearing housing 202. Optionally, the sealing box 10 can be locked to the pressure-bearing housing 202 by fasteners 80 such as screws, or it can also be installed together with the pressure-bearing housing 202 by welding, bonding, or other methods. Figure 6 As shown, the inner side of the sealing box 10 is provided with a first mounting groove 11 for mounting the pump body 20, and a second mounting groove 12 for mounting the silencer 50. In addition, a first connector 13 for connecting the air outlet pipe 30 is also provided.

[0095] Optionally, to facilitate observation of the installation status of components inside the sealed box 10, the sealed box 10 can be made of transparent resin material, including but not limited to acrylic resin (Polymethyl Methacrylate, PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polystyrene (PS), polyvinyl chloride (PVC), MS resin (MethylMethacrylate-Styrene Copolymer, MS), K resin (Butadiene-Styrene Copolymer, K-Resin), epoxy resin (EP), unsaturated polyester resin (UPR), polyurethane (PU), and clear photopolymer resin (ClearResin).

[0096] like Figure 7As shown, the pump body 20 has an outlet 21. The pump body 20 can be a mechanical vacuum pump (or positive displacement vacuum pump), and specific types include, but are not limited to, rotary vane pumps, Roots pumps, screw pumps, etc. Its principle is to use the reciprocating / rotational motion of a rotor or piston to periodically change the volume of the pump chamber, thereby drawing in, compressing, and discharging gas.

[0097] Continue as Figure 7 As shown, the vibration damping assembly 40 includes a vibration damping sleeve 41 and a mounting plate 42. The vibration damping sleeve 41 is fitted onto the outside of the pump body 20. The mounting plate 42 is installed at the opening of the first mounting groove 11, and presses the vibration damping sleeve 41 and the pump body 20 into the first mounting groove 11.

[0098] Optionally, the material of the damping sleeve 41 can be selected from rubber or elastomers with good damping effect, including but not limited to natural rubber (NR), nitrile rubber (NBR), neoprene rubber (CR), styrene-butadiene rubber (SBR), polybutadiene rubber (BR), ethylene-propylene-diene monomer (EPDM), silicone rubber (VMQ), polyurethane elastomer (PU), thermoplastic elastomer (TPE), expanded rubber (EPDM-Foam), etc.

[0099] Optionally, the mounting plate 42 not only serves to fix the pump body 20 and the vibration damping sleeve 41, but also, through material selection, can have a damping effect to absorb vibrational mechanical energy. Therefore, the materials of the mounting plate 42 include, but are not limited to, damping modified epoxy resin (DMEP), high viscoelastic acrylic resin, and phenolic-butyl rubber composite resin (PF / IIR). These resins have good structural strength, providing effective support for the pump body 20 and the vibration damping sleeve 41, while also possessing a certain damping effect to absorb the vibrational mechanical energy of the pump body 20.

[0100] The air outlet pipe 30 connects the air outlet 21 and the first connector 13. Optionally, the air outlet pipe 30 includes two sections, which will be described in detail in the embodiments described later.

[0101] like Figure 5 As shown, the muffler 50 is installed in the second mounting slot 12 and is mounted on the exhaust pipe 30. The muffler 50 works by using the reflection, interference, diffusion, and energy dissipation of sound waves to reduce exhaust noise. Selectable types include a single-expansion chamber muffler 50 or a multi-expansion chamber muffler 50; this will be described in detail in the embodiments described later.

[0102] After the pump body 20 extracts the gas from the pressure-bearing housing 202, it flows out from the outlet 21 into the outlet pipe 30. The gas then enters the silencer 50, which can reduce the noise of the airflow. After that, the airflow is discharged from the first connector 13 to the outside of the sealing box 10.

[0103] The vacuum pump module 100 provided in this embodiment has a vibration damping sleeve 41 fitted outside the pump body 20, which absorbs the high-frequency vibration of the pump body 20 during operation and converts mechanical energy into heat energy for dissipation. The mounting plate 42 presses the vibration damping sleeve 41 and the pump body 20 into the first mounting groove 11, providing continuous pre-tightening damping and weakening the residual amplitude. The sealing box 10 seals the whole, blocking the transmission path of the vibration source to the refrigerator cabinet 200, so that the whole machine operates in a stable state. The silencer 50 is set on the exhaust pipe 30. After the airflow drawn out by the pump body 20 enters the silencer 50, it undergoes pressure reduction, expansion chamber 53 reflection interference, etc., so that the phase of the airflow sound wave cancels out, thereby attenuating the exhaust noise to achieve a noise reduction effect. When the vacuum pump module 100 provided in this application is applied to a refrigerator, the risk of resonance can be eliminated, the noise can be reduced simultaneously, and the quiet experience at night can be significantly improved. Furthermore, the vibration reduction and noise reduction structures in the module are arranged in the same box, without too many exposed pipelines, saving space and significantly reducing the complexity of manufacturing and maintenance.

[0104] Figure 8 This is an exploded view of the sealing box 10, pump body 20, and vibration damping assembly 40 provided in the embodiments of this application. Figure 9 yes Figure 8 Assembly diagram of the central sealing box 10, pump body 20 and vibration damping assembly 40.

[0105] like Figures 8-9 As shown, in some embodiments, the sealing box 10 is provided with a mounting hole 15; the mounting plate 42 has a first through hole 422. The outer side of the vibration damping sleeve 41 is provided with a connecting plate 412, which has a second through hole 413. Fasteners 80 pass through the first through hole 422 and the second through hole 413 in sequence and are connected to the mounting hole 15.

[0106] By using fasteners such as screws to pass through the first through hole 422, the second through hole 413 and lock them into the mounting hole 15, the four parts of mounting plate 42, vibration damping sleeve 41, pump body 20 and sealing box 10 are connected into one unit, so that positioning, pre-pressurization and vibration damping are completed simultaneously, assembly is seamless, disassembly and replacement are done in one step, and the modularity is high.

[0107] Figure 10 yes Figure 8 A schematic diagram of the mounting plate 42 from another perspective.

[0108] like Figure 10 As shown, and in combination Figure 8 As shown, in some embodiments, the sealing box 10 has a plurality of spaced reinforcing ribs 14, each reinforcing rib 14 having an arc-shaped groove 141, and the plurality of arc-shaped grooves 141 forming a first mounting groove 11; the mounting plate 42 has a limiting groove 421 on the side facing the vibration damping sleeve 41. The outer side of the vibration damping sleeve 41 has an annular positioning part 411, which is inserted into the gap between two adjacent reinforcing ribs 14 and into the limiting groove 421. In this way, the annular positioning part 411 can be positioned by the gap between the reinforcing ribs 14 and the limiting groove 421, thereby facilitating the assembly of the mounting plate 42, the vibration damping sleeve 41, and the sealing box 10.

[0109] The first mounting groove 11 is formed by the arc-shaped groove 141 provided on the reinforcing rib 14, which can form a continuous and circumferential support surface, so that the vibration damping sleeve 41 can be in uniform contact with the groove wall of the first mounting groove 11; the rigidity of the reinforcing rib 14 suppresses the deformation of the sealing box 10, which can avoid the appearance of local hard spots in the first mounting groove 11, and ensure that the vibration damping sleeve 41 is always in a uniform compression state, thereby improving the consistency and durability of the vibration damping effect.

[0110] In addition, the annular positioning part 411 is embedded in the gap of the reinforcing rib 14 and inserted into the limiting groove 421 to achieve radial and axial dual positioning, prevent the damping sleeve 41 from slipping and rotating, improve the overall rigidity and damping consistency, and make the assembly and disassembly quick and stable.

[0111] Figure 11 This is an exploded view of the pump body 20, the air outlet pipe 30, the air extraction pipe 60, and the silencer 50 provided in the embodiments of this application. Figure 12 yes Figure 11 This diagram illustrates the assembly of the pump body 20, outlet pipe 30, extraction pipe 60, and silencer 50 into the sealing box 10. It should be noted that... Figure 12 The vibration damping sleeve 41 and the mounting plate 42 are hidden inside.

[0112] like Figures 11-12 As shown, and in combination Figure 6As shown, in some embodiments, the muffler 50 has an inlet connector 51 and an outlet connector 52. The exhaust pipe 30 includes a first sub-pipe 31 and a second sub-pipe 32. One end of the first sub-pipe 31 is connected to the exhaust port 21, and the other end is connected to the inlet connector 51. One end of the second sub-pipe 32 is connected to the outlet connector 52, and the other end is connected to the first connector 13. The sealing box 10 has a support plate 16 for enclosing and forming a second mounting groove 12. U-shaped notches 161 are formed on opposite sides of the support plate 16. The first sub-pipe 31 and the inlet connector 51 are engaged with one of the two U-shaped notches 161, and the second sub-pipe 32 and the outlet connector 52 are engaged with the other of the two U-shaped notches 161.

[0113] The support plate 16 forms a second mounting groove 12, and the symmetrical U-shaped notches 161 on both sides form a quick-locking channel: the inlet connector 51 of the first sub-pipe 31 and the silencer 50, and the outlet connector 52 of the second sub-pipe 32 and the silencer 50 are respectively locked into the U-shaped notches 161, so that the silencer 50 is clamped in the second mounting groove 12 by the side wall of the U-shaped notches 161 through the pipe, which can prevent the silencer 50 from rotating circumferentially and maintain the airtightness of the silencer 50's joints; during disassembly and assembly, it is only necessary to push the pipe in or pull out the pipe from the side, which significantly improves the assembly efficiency and maintenance convenience between the silencer 50 and the pipe.

[0114] Alternatively, the exhaust pipe 30 can be made of elastic materials such as silicone, so that the exhaust pipe 30 can also play a role in damping the vibration of the muffler 50, further reducing noise.

[0115] Figure 13 This is a cross-sectional view of the second sub-pipeline 32 provided in the embodiments of this application.

[0116] like Figure 13 As shown, and in combination Figure 11 and Figure 6 As shown, in some embodiments, the inlet connector 51, the outlet pipe 30, and the U-shaped notch 161 satisfy the following relationship:

[0117] 5%C < 1 / 2B1 + C - 1 / 2A < 20%C;

[0118] 5%C < 1 / 2B2 + C - 1 / 2A < 20%C;

[0119] Where A is the width of the U-shaped notch 161, B1 is the outer diameter of the inlet connector 51, B2 is the outer diameter of the outlet connector 52, and C is the wall thickness of the outlet pipe 30. Figure 13 As shown, taking the cross-sectional view of the second sub-pipe 32 as an example, the wall thickness C of the gas outlet pipe 30 is displayed.

[0120] For example, if C = 2mm, A = 10mm, B1 = B2 = 8.2mm, then 1 / 2B1 + C - 1 / 2A = 1.1 = 5.5%C, and 1 / 2B2 + C - 1 / 2A = 1.1 = 5.5%C, which satisfies the above dimensional relationship.

[0121] For example, if C = 1.5mm, A = 9mm, B1 = 7.8mm, and B2 = 7.9mm, then 1 / 2B1 + C - 1 / 2A = 1.1 = 6%C, and 1 / 2B2 + C - 1 / 2A = 1.1 = 6.3%C, which satisfies the above dimensional relationship.

[0122] This dimensional relationship limits the width A of the U-shaped notch 161, the outer diameter B1 of the inlet connector 51, the outer diameter B2 of the outlet connector 52, and the pipe wall thickness C to a slight interference range of 5%C–20%C. This allows the connector to be pressed into the notch and generate elastic pre-tightening, which can both compensate for manufacturing tolerances to ensure smooth assembly and form radial clamping force to prevent axial movement and rotation. At the same time, it avoids excessive compression that could lead to pipe wall deformation or airtightness failure, thus achieving a combination of quick clamping, reliable positioning, and durable sealing.

[0123] Continue as Figures 11-12 As shown, and in combination Figure 6 As shown, in some embodiments, a second connector 17 is provided on the outer side of the sealing box 10, and a third connector 18 opposite to the second connector 17 is provided on the inner side. The pump body 20 has an air extraction port 22. The vacuum pump module 100 also includes an air extraction pipeline 60, which includes a third sub-pipeline 61 and a fourth sub-pipeline 62. One end of the third sub-pipeline 61 is connected to the pressure-bearing housing 202, and the other end of the third sub-pipeline 61 is connected to the second connector 17; one end of the fourth sub-pipeline 62 is connected to the third connector 18, and the other end of the fourth sub-pipeline 62 is connected to the air extraction port 22.

[0124] The second connector 17 and the third connector 18 are positioned opposite each other. The air extraction pipeline 60 is connected to the sealing box 10 in sections via the third sub-pipeline 61 and the fourth sub-pipeline 62. The air extraction path is covered by the sealing box 10 to isolate external condensation and oil stains and reduce intake noise. The modular plug-and-play structure of the connectors and sub-pipelines enables quick connection between the pump body 20 and the pressure-bearing shell 202. No additional sealant is required for disassembly and assembly. During maintenance, the third sub-pipeline 61 can be pulled out from the pressure-bearing shell 202, which is convenient to operate.

[0125] Figure 14 This is a schematic diagram of an example of the muffler 50 provided in an embodiment of this application. Figure 15 yes Figure 14 A cross-sectional view of the muffler 50.

[0126] like Figures 14-15As shown, in some embodiments, the muffler 50 has an expansion chamber 53, the muffler 50 includes two half-shell structures 54, the half-shell structures 54 are barrel-shaped, and the two half-shell structures 54 are spliced along the axial direction of the muffler 50.

[0127] In the muffler 50 of this embodiment, due to the sudden change of the cross-sectional area of the expansion chamber 53, sound waves are partially reflected at the impedance discontinuity, which weakens the energy propagating forward. A complete expansion chamber 53 can be formed by buckling the two barrel-shaped half-shells together along the axial direction. After disassembly, the internal flow channel is directly exposed, which is convenient for cleaning and significantly improves maintenance efficiency.

[0128] Optionally, when the two half-shell structures 54 are spliced with each other, they can be connected by means of welding, bonding or the like.

[0129] Figure 16 is a schematic diagram of another example of the muffler 50 provided by the embodiment of the present application. Figure 17 is Figure 16 is an exploded view of the muffler 50 in Figure 18 is a Figure 16 is a cross-sectional view of the muffler 50 in

[0130] As Figures 16-18 shown, in some embodiments, the muffler 50 has a plurality of expansion chambers 53 with unequal volumes, the muffler 50 includes two half-shell structures 54, each half-shell structure 54 has an end plate 541, an arc plate 542 and a plurality of partition plates 543, the end plate 541 is located at one end of the arc plate 542, the plurality of partition plates 543 are arranged at intervals on the concave arc surface of the arc plate 542, and each partition plate 543 is provided with a U-shaped groove 544. The two half-shell structures 54 are spliced along the radial direction of the muffler 50, after the two opposite partition plates 543 of the two half-shell structures 54 are spliced, their U-shaped grooves 544 are enclosed to form a through hole 545 for airflow to pass through.

[0131] The working principle of the muffler 50 in this embodiment is as follows: after the gas discharged from the pump body 20 enters from the inlet joint 51 of the muffler 50, the air pressure decreases and the flow velocity decreases due to the sudden expansion of the pipe diameter. When air passes through the partition plates 543, part of the air is blocked, and meanwhile sound waves are reflected in the expansion chambers 53 to consume sound energy. The natural frequencies of each expansion chamber 53 are different, so after multi-stage resonance reflection, the sound power of each octave band can be reduced.

[0132] Optionally, when the two half-shell structures 54 are spliced with each other, they can be connected by means of welding, bonding or the like.

[0133] Optionally, in some embodiments, as Figure 18 shown, the aperture D2 of the through hole 545 is larger than the inner diameter D1 of the inlet joint 51. And the condition is satisfied: D1<D2<2D1. For example, D1=1.3mm and D2=2mm.

[0134] Optionally, in some embodiments, the number of expansion chambers 53 is 2 to 6, and the width difference between each expansion chamber 53 should be greater than 1 / 3 of the width of the smaller chamber.

[0135] like Figure 18 As shown, taking three expansion chambers 53 as an example, L1-L2>1 / 3L2, L2-L3>1 / 3L3, for example, L1=22.1mm, L2=15.075mm, L3=11.125mm, so that the natural frequencies of each expansion chamber 53 have sufficient differences.

[0136] Figure 19 This is an exploded view of the sealing box 10 and sealing ring 70 provided in the embodiments of this application.

[0137] like Figure 19 As shown, in some embodiments, a groove 19 is provided on the side of the sealing box 10 that contacts the pressure-bearing outer shell 202, and a sealing ring 70 is provided in the groove 19. The sealing ring 70 is provided with an auxiliary disassembly block 71 for disassembling the sealing ring 70, and the sealing box 10 is provided with an insertion groove 10a that engages with the auxiliary disassembly block 71. The auxiliary disassembly block 71 has a wire passage groove 711 for avoiding the power line 23 of the pump body 20.

[0138] The sealing ring 70 in the groove 19 is pressed against the pressure-bearing outer shell 202 by the sealing box 10 to form a compression seal; the auxiliary disassembly block 71 is embedded in the insertion groove 10a, which serves as both a positioning wedge for the sealing ring 70 and a handle for gripping. When maintenance is required, the sealing ring 70 can be lifted by simply pulling out the disassembly block without the need for sharp tools, thus preventing scratches on the sealing ring 70; the wire groove 711 allows the power cord 23 to pass through along a fixed path, preventing the sealing ring 70 from being lifted up by the cable and failing, ensuring complete sealing, quick disassembly and assembly, and safe wiring.

[0139] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vacuum pump module for use in a refrigerator, the refrigerator having a pressure-bearing housing (202) for mounting the vacuum pump module (100), characterized in that, The vacuum pump module (100) includes: A sealing box (10) is installed on the pressure-bearing outer shell (202). The inner side of the sealing box (10) is provided with a first mounting groove (11), a second mounting groove (12), and a first connector (13). The pump body (20) has an air outlet (21); Vibration damping assembly (40), the vibration damping assembly (40) comprising: A vibration damping sleeve (41) is fitted onto the outside of the pump body (20); The mounting plate (42) is installed at the opening of the first mounting groove (11) and presses the vibration damping sleeve (41) and the pump body (20) into the first mounting groove (11); An air outlet pipe (30) connects the air outlet (21) and the first connector (13); A silencer (50) is installed in the second mounting slot (12) and the silencer (50) is disposed on the air outlet pipe (30).

2. The vacuum pump module of claim 1, wherein, The sealing box (10) is provided with mounting holes (15); the mounting plate (42) is provided with a first through hole (422); The outer side of the damping sleeve (41) is provided with a connecting plate (412), and the connecting plate (412) has a second through hole (413). Fasteners (80) pass through the first through hole (422) and the second through hole (413) in sequence and are connected to the mounting hole (15).

3. The vacuum pump module according to claim 1, characterized in that, The sealing box (10) has a plurality of spaced reinforcing ribs (14), each of the reinforcing ribs (14) is provided with an arc groove (141), and the plurality of arc grooves (141) form the first mounting groove (11); the mounting plate (42) is provided with a limiting groove (421) on the side facing the vibration damping sleeve (41); The outer side of the damping sleeve (41) is provided with an annular positioning part (411), which is inserted into the gap between two adjacent reinforcing ribs (14) and into the limiting groove (421).

4. The vacuum pump module according to claim 1, characterized in that, The silencer (50) has an inlet connector (51) and an outlet connector (52); The air outlet pipe (30) includes: The first sub-pipe (31) is connected at one end to the air outlet (21) and at the other end to the inlet connector (51); The second sub-pipe (32) is connected at one end to the outlet connector (52) and at the other end to the first connector (13); The sealing box (10) has a support plate (16) for enclosing and forming the second mounting groove (12), and the support plate (16) has U-shaped notches (161) on opposite sides; The first sub-pipe (31) and the inlet connector (51) are engaged in one of the two U-shaped notches (161), and the second sub-pipe (32) and the outlet connector (52) are engaged in the other of the two U-shaped notches (161).

5. The vacuum pump module according to claim 4, characterized in that, The inlet connector (51), the outlet connector (52), the exhaust pipe (30), and the U-shaped notch (161) satisfy the following relationship: 5%C < 1 / 2B1 + C - 1 / 2A < 20%C; 5%C < 1 / 2B2 + C - 1 / 2A < 20%C; Wherein, A is the width of the U-shaped notch (161), B1 is the outer diameter of the inlet connector (51), B2 is the outer diameter of the outlet connector (52), and C is the wall thickness of the outlet pipe (30).

6. The vacuum pump module according to claim 1, characterized in that, The sealing box (10) is provided with a second connector (17) on the outside and a third connector (18) opposite to the second connector (17) on the inside; the pump body (20) has an air extraction port (22); The vacuum pump module (100) also includes: An exhaust pipe (60) comprising: The third sub-pipeline (61) is connected at one end to the pressure-bearing shell (202) and at the other end to the second connector (17); The fourth sub-pipe (62) is connected at one end to the third connector (18) and at the other end to the air extraction port (22).

7. The vacuum pump module according to claim 1, characterized in that, The silencer (50) has an expansion chamber (53), and the silencer (50) includes: Two semi-shell structures (54) are barrel-shaped and are spliced ​​together along the axial direction of the muffler (50).

8. The vacuum pump module according to claim 1, characterized in that, The silencer (50) has multiple expansion chambers (53) of unequal volume, and the silencer (50) includes: Two half-shell structures (54) are provided, each half-shell structure (54) having an end panel (541), an arc plate (542) and a plurality of partition plates (543). The end panel (541) is located at one end of the arc plate (542). The plurality of partition plates (543) are spaced apart on the concave arc surface of the arc plate (542), and each partition plate (543) has a U-shaped groove (544). The two half-shell structures (54) are spliced ​​together along the radial direction of the muffler (50). The U-shaped grooves (544) of the two partition plates (543) of the two half-shell structures (54) enclose each other to form a through hole (545) for airflow.

9. The vacuum pump module according to any one of claims 1-8, characterized in that, A groove (19) is provided on the side of the sealing box (10) that contacts the pressure-bearing outer shell (202), and a sealing ring (70) is provided in the groove (19); The sealing ring (70) is provided with an auxiliary disassembly block (71) for disassembling the sealing ring (70), and the sealing box (10) is provided with a insertion groove (10a) that engages with the auxiliary disassembly block (71). The auxiliary disassembly block (71) has a cable groove (711) for passing the power line (23) of the pump body (20) to avoid the power line (23) of the pump body (20).

10. A refrigerator, characterized in that, include: The housing (200) has a pressure-bearing outer shell (202) inside. The vacuum pump module (100) as described in any one of claims 1-9 is mounted on the pressure-bearing housing (202) with the sealing box (10).

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