CN113339236B - Air extraction connecting device and air extraction method for vacuum drawer - Google Patents
Air extraction connecting device and air extraction method for vacuum drawer Download PDFInfo
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- CN113339236B CN113339236B CN202110718112.0A CN202110718112A CN113339236B CN 113339236 B CN113339236 B CN 113339236B CN 202110718112 A CN202110718112 A CN 202110718112A CN 113339236 B CN113339236 B CN 113339236B
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- Prior art keywords
- butt joint
- exhaust
- drawer
- sleeve
- joint pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/123—Fluid connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D25/00—Charging, supporting, and discharging the articles to be cooled
- F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
- F25D25/024—Slidable shelves
- F25D25/025—Drawers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses an air extraction connecting device and an air extraction method for a vacuum drawer, which comprise a pressure sensor, a fixed cover, an exhaust sleeve, a rubber sleeve, a spring, a butt joint pipe, a silica gel sealing cover and a fixed plate, wherein the pressure sensor is arranged on the fixed cover; one end of the exhaust sleeve is hermetically connected with the fixed cover, the other end of the exhaust sleeve is fixed on the fixed plate provided with a through hole, one part of the butt joint pipe penetrates through the through hole and extends into the exhaust sleeve, and the other part of the butt joint pipe is in a suspended state; an exhaust hole is formed in one end, close to the fixed cover, of the exhaust sleeve, and the rubber sleeve and the spring are sequentially and coaxially fixed in the exhaust sleeve; the whole butt joint pipe is of a three-stage step structure, the smaller-diameter end is a cone, the cone penetrates through the through hole and the spring and extends into the rubber sleeve, and the large-diameter end is fixedly provided with the silica gel sealing cover. The air extraction connecting device provides a large fault-tolerant space with 3 degrees of freedom for the independent sealing drawer assembly, can effectively make up for butt joint errors caused by assembly errors of other assemblies, and also provides 3 compensation spaces with rotational degrees of freedom in a small size range.
Description
Technical Field
The invention belongs to the technical field of vacuum drawers, and particularly relates to an air extraction connecting device and an air extraction method for a vacuum drawer.
Background
The application of the refrigerator fresh-keeping vacuum fresh-keeping technology is more and more extensive, the matching technology is updated day by day, especially the fresh-keeping drawer applied to the refrigerating chamber needs to be matched with a vacuum pump to discharge the air in the drawer in the use process, the prior technical scheme is that the openings of the outer cavity of the drawer are directly connected through a hose, the outer cavity of the drawer needs to be fixed, the drawer and the outer cavity of the drawer form sealing through a matching surface, the outer cavity and the drawer combined scheme has the problem of poor portability, and the cost of the whole scheme is higher; the second scheme is that a hard round pipe is designed at the tail of the sealed drawer and is inserted into a soft joint at an air exhaust end, the scheme has high requirement on the precision of the matching position of the sealed drawer and the soft joint, particularly has high requirement on the relative position in the vertical and horizontal directions, and the phenomenon of poor butt joint or drawer deflection after butt joint can occur once deviation exists. Meanwhile, if the front and back directions deviate, the phenomena of poor sealing and air leakage occur; the third scheme is directly connected the hose, and the hose moves along with the drawer is whole, and this kind of scheme is after long-term the use, appears the pipeline easily and drops, wearing and tearing break, leads to gas leakage phenomenon, and the aesthetic property is relatively poor simultaneously.
Disclosure of Invention
In order to solve the problems, the invention provides an air extraction connecting device and an air extraction method for a vacuum drawer, which have reasonable design, overcome the defects of the prior art and have good effects.
In order to achieve the above object 1, the present invention adopts the following technical solutions:
an air exhaust connecting device for a vacuum drawer comprises a pressure sensor, a fixed cover, an exhaust sleeve, a rubber sleeve, a spring, a butt joint pipe, a silica gel sealing cover and a fixed plate;
one end of the exhaust sleeve is hermetically connected with the fixed cover, the other end of the exhaust sleeve is fixed on the fixed plate provided with a through hole, one part of the butt joint pipe penetrates through the through hole and extends into the exhaust sleeve, and the other part of the butt joint pipe is in a suspended state; one end of the exhaust sleeve close to the fixed cover is provided with an exhaust hole, and the vacuum pump is connected to the exhaust hole through a silicone tube; the rubber sleeve and the spring are sequentially and coaxially fixed in the exhaust sleeve; the butt joint pipe is integrally of a three-stage step structure, the end with the smaller diameter is a cone, penetrates through the through hole and the spring and extends into the rubber sleeve, and the end with the larger diameter is fixedly provided with the silica gel sealing cover; one end of the spring is propped against the rubber sleeve, the other end of the spring is propped against the second-stage step of the butt joint pipe, and the butt joint pipe can move in the exhaust sleeve through the compression spring, so that the contact surface of the butt joint pipe and the rubber sleeve is a sealing surface.
Furthermore, a pressure sensor is fixed on the inner side of the fixing cover, a wire guide hole is formed in the fixing cover, and a wire led out from the pressure sensor penetrates through the wire guide hole and is connected to the control board.
Furthermore, two square bulges are symmetrically arranged on the outer wall of the rubber sleeve; four strip-shaped grooves extending along the axis direction are uniformly formed in the outer wall of the rubber sleeve; the inner wall of the rubber sleeve is sequentially provided with a plurality of annular convex edges along the axis, and the cross sections of the annular convex edges are in a sawtooth shape.
Furthermore, two positioning square holes matched with the square bulges are formed in the side wall of the exhaust sleeve, and the rubber sleeve is fixed in the exhaust sleeve; four ribs matched with the strip-shaped grooves are arranged on the inner wall of the exhaust sleeve to prevent rotation; one end of the exhaust sleeve, which is far away from the fixed cover, is symmetrically provided with two strip-shaped openings along the axis direction; two positioning seats are symmetrically arranged on the outer wall of the exhaust sleeve and fixed on the fixing plate through screws.
Furthermore, the butt joint pipe is composed of a cone section, a first cylindrical section and a second cylindrical section, a sealing groove matched with the annular convex edge is formed in the outer wall of the cone section, the first cylindrical section can just stretch into the exhaust sleeve to abut against the spring, and a circular groove is formed in the opening end of the second cylindrical section.
Furthermore, two limiting parts are symmetrically arranged at the joint of the cone section and the first cylindrical section, and the limiting parts slide left and right in the elongated opening.
Furthermore, a through hole for the first cylindrical section and the limiting part to pass through is formed in the fixing plate.
Furthermore, one end of the silica gel sealing ring is of a boss structure matched with the circular groove, and the other end of the silica gel sealing ring is provided with a plurality of layers of annular fins; the outer diameter of the silica gel sealing cover is larger than the diameter of the exhaust hole of the drawer.
In order to achieve the above object 2, the present invention adopts the following technical solutions:
an air extraction method for a vacuum drawer adopts the air extraction connecting device, the drawer is closed by an actuatable cover body and moves towards the air extraction connecting device, an air outlet of the drawer is in sealing contact with a silica gel sealing cover, the drawer continuously moves and pushes a butt joint pipe, the butt joint pipe compresses a spring and moves in an air exhaust sleeve, when 3/4 of a cone section enters the rubber sleeve, the contact surface between the butt joint pipe and the rubber sleeve is a sealing surface, a sealing cavity is formed among the air exhaust sleeve, the butt joint pipe and the drawer, the vacuum pump starts to work, a pressure sensor transmits a pressure signal in the sealing cavity to a control panel, and when the pressure value in the whole sealing cavity reaches a preset value, the control panel controls the vacuum pump to stop working; when the drawer is separated, the silica gel sealing cover and the butt joint pipe are driven to move towards the direction of separating the drawer, the internal pressure and the external pressure of the device are balanced, and the drawer is continuously separated without resistance under the action of the spring.
The invention has the following beneficial technical effects:
the drawer outer cavity structure is omitted, the top of the drawer is directly sealed by the cover, the drawer moves in an integral sealing mode, the structure of the drawer outer cavity is saved, and the drawer outer cavity structure has the advantages of cost and mobility. The invention provides a large fault-tolerant space with 3 degrees of freedom for the independent sealed drawer assembly, which is respectively in the X direction, the Y direction and the Z direction, and can effectively compensate the butt joint error caused by the assembly error of other assemblies. While also providing 3 small size ranges of rotational freedom compensation space.
Drawings
FIG. 1 is an exploded view of a suction attachment according to the present invention;
FIG. 2 is a schematic view of the whole of the air extraction connection device of the present invention;
FIG. 3 is a schematic view of a pressure sensor retaining cap according to the present invention;
FIG. 4 is a schematic view of the exterior of the exhaust sleeve according to the present invention;
FIG. 5 is a schematic view of the interior of an exhaust sleeve according to the present invention;
FIG. 6 is a schematic view of a rubber bushing proposed by the present invention;
FIG. 7 is a schematic view of a butt joint pipe according to the present invention;
FIG. 8 is a schematic view of a silicone sealing cap according to the present invention;
FIG. 9 is a schematic view of the suction attachment of the present invention in an installed, in use configuration;
FIG. 10 is a schematic view of the drawer according to the present invention in a position prior to insertion;
FIG. 11 is a schematic view of the drawer according to the present invention in a closed position;
1-fixing the cover; 101-wire guides; 2-an exhaust sleeve; 201-positioning square holes; 202-a strip-shaped gap; 203-ribs; 204-silicone tube; 3-rubber sleeve; 301-square protrusion; 302-a strip-shaped groove; 303-annular bead; 4-a spring; 5, butt joint of pipes; 501-a cone segment; 502-a first cylindrical section; 503-a second cylindrical section; 504-a seal groove; 505-circular grooves; 506-a limiting part; 6-silica gel sealing cover; 601-boss structure; 602-circular fin edge; 7-drawer body; 701-drawer vent hole; 8, fixing a plate; 9-positioning seat;
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
an air extraction connecting device comprises a pressure sensor, a fixing cover 1, an exhaust sleeve 2, a rubber sleeve 3, a spring 4, a butt joint pipe 5, a silica gel sealing cover 6 and a fixing plate 8;
one end of the exhaust sleeve 2 is hermetically connected with the fixed cover 1, the other end of the exhaust sleeve is fixed on a fixed plate 8 provided with a through hole, one part of the butt joint pipe 5 penetrates through the through hole and extends into the exhaust sleeve 2, and the other part of the butt joint pipe is in a suspended state; one end of the exhaust sleeve 2 close to the fixed cover 1 is provided with an exhaust hole, and the vacuum pump is connected to the exhaust hole through a silicone tube 204; the rubber sleeve 3 and the spring 4 are sequentially and coaxially fixed in the exhaust sleeve 2; the butt joint pipe 5 is integrally of a three-stage step structure, the end with the smaller diameter is a cone, penetrates through the through hole and the spring 4 and extends into the rubber sleeve 2, and the end with the larger diameter is fixedly provided with a silica gel sealing cover 6; one end of the spring 4 is propped against the rubber sleeve 3, the other end of the spring is propped against the second-stage step of the butt joint pipe 5, and the butt joint pipe 5 can move in the exhaust sleeve 2 through the compression spring 4, so that the contact surface between the butt joint pipe 5 and the rubber sleeve 3 is a sealing surface.
Specifically, a pressure sensor is fixed on the inner side of the fixed cover 1, a wire hole 101 is formed in the fixed cover 1, a wire led out from the pressure sensor passes through the wire hole 101 to be connected to the control board, and the fixed cover 1 is fixed at one end of the exhaust sleeve 2 through a screw.
Further, two square protrusions 301 are symmetrically arranged on the outer wall of the rubber sleeve 3; four strip-shaped grooves 302 extending along the axis direction are uniformly formed in the outer wall of the rubber sleeve 3; the inner wall of the rubber sleeve 3 is sequentially provided with a plurality of annular convex edges 303 along the axis, and the cross sections of the annular convex edges 303 are in a sawtooth shape.
Furthermore, two positioning square holes 201 matched with the square protrusions 301 are formed in the side wall of the exhaust sleeve 2, and the rubber sleeve 3 is fixed in the exhaust sleeve 2; the inner wall of the exhaust sleeve 2 is provided with four ribs 203 matched with the elongated groove 302 to prevent rotation; one end of the exhaust sleeve 2, which is far away from the fixed cover 1, is symmetrically provided with two strip-shaped openings 202 along the axis direction; two positioning seats 9 are symmetrically arranged on the outer wall of the exhaust sleeve 2 and fixed on a fixing plate 8 through screws.
Specifically, the butt joint pipe 5 is composed of a cone section 501, a first cylindrical section 502 and a second cylindrical section 503, a first step is formed between the first cylindrical section 502 and the second cylindrical section 503, and a second step is formed between the cone section 501 and the first cylindrical section 502; the cone section 501 extends into the spring 4 and the rubber sleeve 3, when 3/4 of the cone section extends into the rubber sleeve, the butt joint pipe is in sealing contact with the rubber sleeve, the design aims at solving the problem that the drawer drawing force is too large due to negative pressure when the drawer is drawn out, and under the same pressure intensity, the section area of the wider opening end of the thin opening end is smaller, and the thin opening end can be separated by smaller force (the pressure intensity is the contact area = pressure); the outer wall of the cone section 501 is provided with a sealing groove 504 matched with the ring 303, the first cylindrical section 502 can just extend into the exhaust sleeve 2 to abut against the spring 4, and the open end of the second cylindrical section 503 is provided with a circular groove 505.
Specifically, two limiting parts 506 are symmetrically arranged at the joint of the cone section 501 and the first cylindrical section 502, and the limiting parts 506 slide left and right in the elongated opening 202 and simultaneously prevent the butt joint pipe from separating.
Specifically, the fixing plate 8 is provided with a through hole for the first cylindrical section 502 and the limiting portion 506 to pass through.
Specifically, one end of the silica gel sealing cover 6 is a boss structure 601 matched with the circular groove 505, and the other end is provided with a plurality of layers of annular fins 602, so that the function of compensating the parallelism deviation between the exhaust hole surface of the drawer and the silica gel sealing cover surface is realized, and the compensation function of 3 rotational degrees of freedom is provided; the outer diameter of the silica gel sealing cover 6 is larger than the diameter of the exhaust hole 701 of the drawer
Specifically, two positioning seats 205 are arranged at positions of the exhaust sleeve 2 where the two strip-shaped openings rotate by 90 degrees, and are fixed on the fixing plate 8 through screws.
The device provides a big fault-tolerant space that has 3 degrees of freedom, is X respectively to, Y to and Z to, and X is realized to the sealed lid outer lane of silica gel through major diameter and the drawer exhaust hole of minor diameter with Y, as long as the exhaust hole removes in the ring that the sealed lid of silica gel formed, and the exhaust hole is in effective scope of bleeding all the time, and Z is realized to the back 3/4 compression distance of fault-tolerant through the spring.
An air extraction method for a vacuum drawer adopts an air extraction connecting device as described above, the drawer is closed by an actuatable cover body and moves towards the air extraction connecting device, a drawer air outlet 701 is in sealing contact with a silica gel sealing cover 6, the drawer continuously moves and pushes an abutting pipe 5, the abutting pipe 5 compresses a spring 4 and moves in an air exhaust sleeve 2, when 3/4 of a cone section 501 enters the rubber sleeve 3, the contact surface between the abutting pipe 5 and the rubber sleeve 3 is a sealing surface, a sealing cavity is formed among the air exhaust sleeve, the abutting pipe and the drawer, the sealing cavity is in a sealing state, a vacuum pump starts to work, a pressure sensor transmits a pressure signal in the sealing cavity to a control panel, and when the pressure value in the sealing cavity reaches a preset value, the control panel controls the vacuum pump to stop working; when the drawer is separated, the silica gel sealing cover 6 and the butt joint pipe 5 are driven to move towards the direction of separating the drawer, the internal pressure and the external pressure of the device are balanced, and the drawer is continuously separated without resistance under the action of the spring 4.
The above is a complete implementation process of the present embodiment.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. An air extraction method for a vacuum drawer is characterized in that an air extraction connecting device for the vacuum drawer is adopted, and the air extraction connecting device comprises a pressure sensor, a fixed cover, an exhaust sleeve, a rubber sleeve, a spring, a butt joint pipe, a silica gel sealing cover and a fixed plate;
one end of the exhaust sleeve is hermetically connected with the fixed cover, the other end of the exhaust sleeve is fixed on the fixed plate provided with a through hole, one part of the butt joint pipe penetrates through the through hole and extends into the exhaust sleeve, and the other part of the butt joint pipe is in a suspended state; one end of the exhaust sleeve close to the fixed cover is provided with an exhaust hole, and the vacuum pump is connected to the exhaust hole through a silicone tube; the rubber sleeve and the spring are sequentially and coaxially fixed in the exhaust sleeve; the butt joint pipe is sequentially composed of a cone section, a first cylindrical section and a second cylindrical section, the whole butt joint pipe is of a three-stage step structure, a first stage step is formed between the first cylindrical section and the second cylindrical section, and a second stage step is formed between the cone section and the first cylindrical section; the end with the smaller diameter is a cone, penetrates through the through hole and the spring and extends into the rubber sleeve, and the end with the larger diameter is fixedly provided with a silica gel sealing cover; one end of the spring props against the rubber sleeve, the other end of the spring props against the second-stage step of the butt joint pipe, and the butt joint pipe can move in the exhaust sleeve through the compression spring, so that the contact surface of the butt joint pipe and the rubber sleeve is a sealing surface;
the method is characterized in that the air extraction method comprises the following steps: the drawer is closed by an actuatable cover body and moves towards the air extraction connecting device, an air outlet of the drawer is in sealing contact with the silica gel sealing cover, the drawer continues to move and pushes the butt joint pipe, the butt joint pipe compresses the spring and moves in the air exhaust sleeve, when 3/4 of the cone section enters the rubber sleeve, the contact surface between the butt joint pipe and the rubber sleeve is a sealing surface, a sealing cavity is formed among the air exhaust sleeve, the butt joint pipe and the drawer, the vacuum pump starts to work, the pressure sensor transmits a pressure signal in the sealing cavity to the control panel, and when the pressure value in the whole sealing cavity reaches a preset value, the control panel controls the vacuum pump to stop working; when the drawer is separated, the silica gel sealing cover and the butt joint pipe are driven to move towards the direction of separating the drawer, the internal pressure and the external pressure of the device are balanced, and the drawer continues to separate without resistance under the action of the spring.
2. The exhausting method for the vacuum drawer according to claim 1, wherein the fixing cover has a pressure sensor fixed inside, the fixing cover has a wire hole, and the wire led out from the pressure sensor is connected to the control board through the wire hole.
3. The air exhausting method for the vacuum drawer as claimed in claim 1, wherein the outer wall of the rubber sleeve is symmetrically provided with two square protrusions;
four strip-shaped grooves extending along the axis direction are uniformly formed in the outer wall of the rubber sleeve;
the inner wall of the rubber sleeve is sequentially provided with a plurality of annular convex edges along the axis, and the cross sections of the annular convex edges are in a sawtooth shape.
4. The air exhaust method for the vacuum drawer according to claim 3, wherein the side wall of the exhaust sleeve is provided with two positioning square holes matched with the square protrusions;
the inner wall of the exhaust sleeve is provided with four ribs matched with the elongated grooves;
two strip-shaped openings are symmetrically formed in one end, far away from the fixed cover, of the exhaust sleeve along the axis direction.
5. The pumping method of claim 3, wherein the outer wall of the cone section is provided with a sealing groove matching with the annular rib, the first cylindrical section is just capable of extending into the exhaust sleeve to abut against the spring, and the open end of the second cylindrical section is provided with a circular groove.
6. The air exhausting method for the vacuum drawer according to claim 5, wherein the connection part of the cone segment and the first cylinder segment is symmetrically provided with two limiting parts, and the limiting parts slide left and right in the elongated gap.
7. The method as claimed in claim 6, wherein the fixing plate has a through hole for the first cylindrical section and the position-limiting portion to pass through.
8. An air exhaust method for a vacuum drawer as claimed in claim 5, wherein one end of the silicone sealing cover is a boss structure matched with the circular groove, the other end of the silicone sealing cover is provided with a plurality of layers of annular fins, and the outer diameter of the silicone sealing cover is larger than the diameter of the drawer exhaust hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718112.0A CN113339236B (en) | 2021-06-28 | 2021-06-28 | Air extraction connecting device and air extraction method for vacuum drawer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718112.0A CN113339236B (en) | 2021-06-28 | 2021-06-28 | Air extraction connecting device and air extraction method for vacuum drawer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113339236A CN113339236A (en) | 2021-09-03 |
| CN113339236B true CN113339236B (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110718112.0A Active CN113339236B (en) | 2021-06-28 | 2021-06-28 | Air extraction connecting device and air extraction method for vacuum drawer |
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| CN (1) | CN113339236B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483532B (en) * | 2022-01-27 | 2024-05-14 | 澳柯玛股份有限公司 | Distance-adjustable vacuumizing connecting device |
| GB2634262A (en) * | 2023-10-03 | 2025-04-09 | Edwards Korea Ltd | Vacuum pump gas turret |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203345433U (en) * | 2013-06-21 | 2013-12-18 | 苏州盟通利机电设备有限公司 | Full-automatic vacuum preservation box |
| CN103644699B (en) * | 2013-12-06 | 2016-06-15 | 南京创维家用电器有限公司 | Vacuum drawer and refrigerator |
| KR101667728B1 (en) * | 2014-11-10 | 2016-10-19 | 엘지전자 주식회사 | Refrigerator |
| DE102015013444A1 (en) * | 2015-10-15 | 2017-04-20 | Michatek K.S. | Vacuum drawer for vacuuming food |
| CN109527849B (en) * | 2019-01-22 | 2023-09-22 | 中山佳威路家用电器有限公司 | A magnetically controlled drawer-type vacuum storage cabinet |
| CN209623208U (en) * | 2019-02-27 | 2019-11-12 | 合肥华凌股份有限公司 | Antistaling vacuum container and refrigerator |
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- 2021-06-28 CN CN202110718112.0A patent/CN113339236B/en active Active
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