CN112393513B

CN112393513B - A kind of refrigerator

Info

Publication number: CN112393513B
Application number: CN201910756799.XA
Authority: CN
Inventors: 王美艳; 闫军旺; 金永益; 朱建高; 罗光华
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2022-03-18
Anticipated expiration: 2039-08-16
Also published as: CN112393513A

Abstract

The invention discloses a refrigerator, which comprises a vacuum packaging device arranged on the outer side of a door body, wherein the vacuum packaging device comprises: a lower support and an upper support; the upper support can move towards or away from the lower support under the driving of the driving device; the upper support moves to the upper support at a first speed to contact the sealing ring on the lower support, then moves to the lower support at a second speed until the sealing ring has a set deformation amount, and then stops, and the first opening cavity and the second opening cavity are in butt joint sealing to form a vacuumizing area; wherein the first speed is greater than the second speed; and the vacuumizing assembly is communicated with the vacuumizing area through a pipeline and is used for vacuumizing or decompressing the vacuumizing area. The refrigerator can carry out vacuumizing packaging treatment on the storage bag filled with food materials; the upper support can move at different speeds under the action of the driving device, so that the packaging efficiency is improved on one hand, and the vacuumizing reliability is ensured on the other hand.

Description

A kind of refrigerator

Technical Field

The invention relates to the field of household appliances, in particular to a refrigerator.

Background

In recent years, people's health consciousness is gradually improved, and the demand for food material preservation is also improved, so that the refrigerator is used as the most common household appliance for storing food materials, and the food material preservation storage becomes a technical demand to be solved urgently in the field of refrigerators.

At present, different preservation technologies are introduced by various manufacturers aiming at the problem of food material preservation and storage. For example, in the vacuum preservation technology, the food deterioration condition is changed in the vacuum state. Firstly, in a vacuum environment, microorganisms and various promoting enzymes are difficult to survive, and the requirement of microorganism breeding can be met for a long time; secondly, under the vacuum state, the oxygen in the container is greatly reduced, various chemical reactions can not be completed, the food can not be oxidized, and the food can be preserved for a long time.

The vacuum preservation technology applied to the refrigerator at present mainly comprises the steps that a sealed drawer is arranged in the refrigerator, and the drawer is vacuumized through a small vacuum pump arranged outside the drawer, so that the drawer is kept in a negative pressure state, and the preservation of food materials in the drawer is realized. This preservation method has the following limitations: 1. because the vacuum pumping treatment is realized by a vacuum pump, the vacuum pump can occupy part of the storage space of the refrigerating chamber; 2. the drawer is required to be sealed in the fresh-keeping mode, otherwise, the vacuum state cannot be formed in the drawer, and therefore higher requirements are provided for the forming and assembling processes of the drawer; 3. the fresh-keeping mode can only keep food materials in the drawer fresh, and food materials in other areas of the refrigerator cannot be kept fresh.

Disclosure of Invention

The invention aims to solve the technical problem that the existing refrigerator is not ideal in fresh-keeping effect, and further provides a refrigerator which is low in cost, does not occupy storage space and can keep food materials in all areas fresh.

In order to solve the technical problem, the invention discloses a refrigerator, which comprises a vacuum packaging device arranged on the outer side of a door body, wherein the vacuum packaging device comprises: the upper side of the lower support is provided with a first open cavity and a sealing ring surrounding the first open cavity; the lower side of the upper support is correspondingly provided with a second open cavity and a sealing ring surrounding the second open cavity, and the upper support can move towards or away from the lower support under the driving of a driving device; the driving device comprises a motor and a transmission mechanism, the transmission mechanism is used for converting the rotary motion of the motor into linear motion, the output end of the transmission mechanism is connected with the upper support, the upper support moves to a sealing ring on the upper support at a first speed to be contacted with a sealing ring on the lower support, then moves to the lower support at a second speed to be stopped after the sealing ring has a set deformation, and the first open cavity and the second open cavity are in butt joint sealing to form a vacuumizing area; wherein the first speed is greater than the second speed; and the vacuumizing assembly is communicated with the vacuumizing area through a pipeline and is used for vacuumizing or decompressing the vacuumizing area.

Compared with the prior art, the technical scheme of the invention has the following technical effects:

according to the refrigerator, the door body is provided with the vacuum packaging device, so that a storage bag filled with food materials to be put into the refrigerator can be subjected to vacuum packaging treatment; compared with the existing vacuum drawer, the vacuum packaging device can be used for vacuumizing and refreshing food materials stored in various compartments of a refrigerator, so that the refreshing range is expanded; in addition, the upper support is controlled to move up and down through the driving device, so that automatic vacuum packaging is realized, and the intelligent degree of the refrigerator is improved; meanwhile, the driving device drives the upper support to move to the direction close to the lower support in a higher speed, and then the sealing ring on the upper support is contacted with the sealing ring on the lower support, and then the driving device stops moving to the lower support at a low speed until the sealing ring has a set deformation. The device can quickly descend in the initial stage, and when the upper sealing ring and the lower sealing ring are contacted, the vacuum pump is started; the vacuumizing packaging efficiency is improved; and then the upper support moves downwards with low rotating speed and large acting force until the sealing ring generates enough deformation for sealing the vacuumizing area, and then the upper support stops, so that the sealing performance of the vacuumizing area can be improved, and the hidden trouble that the vacuumizing area is too slow in vacuumizing or cannot be vacuumized due to air leakage is avoided.

Drawings

The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of a refrigerator according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a refrigeration door body in embodiment 1 of the present invention;

FIG. 3 is an exploded view of a refrigeration door body in accordance with embodiment 1 of the present invention;

FIG. 4 is a side cross-sectional view of the vacuum packaging appliance of the present invention;

FIG. 5 is a schematic diagram of the upper support of the vacuum packaging apparatus according to the present invention in the forward and reverse directions;

FIG. 6 is an assembly view of the upper support, the driving device and the vacuum pumping assembly of the vacuum packaging apparatus according to the present invention;

FIG. 7 is an exploded view of the upper support, the driving device and the vacuum assembly of the vacuum packaging apparatus of the present invention;

FIG. 8 is a view showing the connection between the upper support and the filtering container in the vacuum packaging apparatus according to the present invention;

FIG. 9 is a diagram showing a connection relationship between an upper support and a filter net in the vacuum packaging apparatus of the present invention;

FIG. 10 is an exploded view of the upper support and heating device and seal ring of the present invention;

FIG. 11 is a partial cross-sectional view of the upper support coupled to a heating device in accordance with the present invention;

FIG. 12 is a schematic view of the connection between the upper support and the driving device in the initial position according to the present invention;

FIG. 13 is a schematic view of the connection between the upper bracket and the driving device in the lowered position according to the present invention;

fig. 14A is a schematic structural view of a lower support, a heat-insulating small door and a door body in a locked state in embodiment 1 of the present invention;

fig. 14B is a schematic structural view of the lower support, the heat-insulating small door, and the door body in an unlocked state in embodiment 1 of the present invention;

fig. 14C is a schematic structural view of the lower bracket and the heat-insulating small door removed from the door body in embodiment 1 of the present invention;

FIG. 15 is a schematic view showing the forward and backward structures of the thermal insulating wicket and the lower support in the assembled state in accordance with embodiment 1 of the present invention;

fig. 16 is an exploded view of the heat-insulating wicket, lower support and latch hook assembly in embodiment 1 of the present invention;

fig. 17 is a schematic structural view of the heat-insulating wicket assembly mounted on the heat-insulating wicket in embodiment 1 of the present invention;

fig. 18 is a partial sectional view showing that the latch hook assembly is installed at the thermal door in embodiment 1 of the present invention;

fig. 19 is a perspective view of the lower hook in embodiment 1 of the present invention;

fig. 20 is a schematic diagram of the forward and reverse structures of the upper latch hook according to embodiment 1 of the present invention;

FIG. 21 is a schematic flow chart illustrating the descending process of the upper support of the vacuum packaging apparatus according to the present invention;

FIG. 22 is a schematic flow chart of the vacuum-pumping plastic-sealing process of the vacuum packaging apparatus according to the present invention;

FIG. 23 is a schematic flow chart illustrating the deflating process and the ascending process of the upper support of the vacuum packaging apparatus according to the present invention;

fig. 24A is a schematic structural view of a lower support, a heat-insulating small door and a door body in a locked state in embodiment 2 of the present invention;

fig. 24B is a schematic structural view of a lower support and a heat-insulating small door removed from a door body in embodiment 2 of the present invention;

fig. 25 is an exploded view of the heat-insulating wicket, lower support and latch hook assembly in embodiment 2 of the present invention;

fig. 26A is a schematic structural view of a lower support, a heat-insulating small door and a door body in a locked state in embodiment 3 of the present invention;

fig. 26B is a schematic structural view of the heat-insulating small door and the door body in an unlocked state in embodiment 3 of the present invention;

fig. 26C is a schematic structural view of the lower bracket and the heat-insulating small door removed from the door body in embodiment 3 of the present invention;

fig. 27 is a schematic structural view of a refrigerator according to embodiment 4 of the present invention;

FIG. 28 is an exploded view of the refrigeration door body in embodiment 4 of the present invention;

fig. 29 is a schematic structural view of a refrigerator according to embodiment 5 of the present invention;

FIG. 30 is an exploded view of a refrigeration door body in accordance with embodiment 5 of the present invention;

fig. 31 is an exploded view of a lower holder in embodiment 5 of the present invention;

fig. 32A is a schematic structural view of a lower bracket and a door body in a locked state in embodiment 5 of the present invention;

fig. 32B is a schematic structural view of a state in which the lower mount is detached from the door body in embodiment 5 of the present invention;

fig. 33A is a schematic structural view of a lower bracket and a door body in a locked state according to embodiment 6 of the present invention;

fig. 33B is a schematic structural view of a state in which the lower holder is detached from the door body in embodiment 6 of the present invention.

Detailed Description

The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

FIG. 1 is a perspective view of one embodiment of a refrigerator according to the present invention; referring to fig. 1, the refrigerator 1 of the present embodiment has an approximately rectangular parallelepiped shape. The refrigerator 1 has an external appearance defined by a storage chamber 100 defining a storage space and a plurality of door bodies 200 disposed in the storage chamber 100, wherein, referring to fig. 2, the door body 200 includes a door body outer shell 210 located outside the storage chamber 100, a door body inner container 220 located inside the storage chamber 100, an upper end cover 230, a lower end cover 240, and an insulating layer located between the door body outer shell 210, the door body inner container 220, the upper end cover 230, and the lower end cover 240; typically, the thermal insulation layer is filled with a foam material.

The storage chamber 100 has an open cabinet, and the storage chamber 100 is vertically partitioned into a lower freezer compartment a and an upper refrigerator compartment 100B. Each of the partitioned spaces may have an independent storage space. In detail, the freezing compartment 100A is located at a lower side of the storage compartment 100 and may be selectively covered by a drawer type freezing compartment door a. The space above the freezing chamber 100A is partitioned into left and right sides to form a refrigerating chamber 100B, respectively, and the refrigerating chamber 100B may be selectively opened or closed by a refrigerating chamber door body 200B pivotably mounted on the refrigerating chamber 100B.

As shown in fig. 3 and 4, a vacuum packaging device 300 is arranged on the door body 200 of the refrigerator, and the vacuum packaging device 300 is used for vacuumizing and plastic packaging a storage bag; the vacuum sealing apparatus 300 may be installed on the freezing door 200A or the refrigerating door 200B, and since the refrigerating door 200B is located at the upper side, it is generally preferable to be installed on the refrigerating door 200B in order to meet the use habit of the user.

As shown in fig. 4 to 17, an embodiment of the vacuum packaging apparatus 300 is provided, in this embodiment, as shown in fig. 4, the vacuum packaging apparatus 300 includes: the lower support 310 is provided with a first open cavity 311; the upper support 320 is provided with a second open cavity 321, the upper support 320 can move towards or away from the lower support 310 under the driving of a driving device 340, and after the upper support 320 moves to a position close to the lower support 310, the first open cavity 311 is in butt joint with the second open cavity 321 and sealed to form the vacuum-pumping region 301. The vacuum packaging device 300 realizes locking and unlocking of the lower support 310 and the upper support 320 by controlling automatic lifting of the driving device 340, realizes automatic vacuum packaging, and improves the intelligent degree of the refrigerator.

Specifically, in order to improve the sealing performance of the vacuum-pumping region 301, as shown in fig. 4, the lower support 310 is provided with a first sealing groove 313 on the periphery of the first open cavity 311, the upper support 320 is provided with a second sealing groove 323 on the periphery of the second open cavity 321, and the first sealing groove 313 is opposite to the second sealing groove 323 and is provided with a sealing ring 350 inside. The two sealing rings 350 arranged in the first sealing groove 313 and the second sealing groove 323 seal the vacuum-pumping region 301 on the inside, so that a reliable sealing of the vacuum-pumping region 301 is achieved.

Specifically, as shown in fig. 5, a position-limiting part is arranged in the first open cavity 311 or the second open cavity 321, and is used for limiting an insertion position of the storage bag inserted into the vacuum-pumping area 301, so as to prevent an opening position of the storage bag from extending out of the vacuum-pumping area 301; specifically, the limiting part is a limiting rib 322 arranged in the first open cavity 311 or the second open cavity 321, and the height of the limiting rib 322 is greater than the depth of the first open cavity 311 or the second open cavity 321; the length of the limiting rib 322 is slightly less than the length of the first open cavity 311 or the second open cavity 321. When a user inserts the storage bag into the vacuum-pumping area 301, the limiting rib 322 can block the storage bag from being inserted inwards continuously; in other embodiments, the vacuum-pumping area 301 may further include an in-place detection device, specifically, a microwave sensor or an infrared sensor may be used to detect whether an object bag inserted into the vacuum-pumping area 301 exists, and further send a signal indicating whether the object bag is in place to the controller, and the controller may control the vacuum pump to be turned on according to the in-place signal. Whether the storage bag is in place or not can be automatically detected by arranging the in-place detection device, and the controller can further automatically control the on-off of the vacuum pump.

The vacuum packaging apparatus 300 further comprises a vacuum-pumping assembly 330, as shown in fig. 6 and 7, the vacuum-pumping assembly 330 comprises a vacuum pump 331 communicating with the vacuum-pumping region 301 through a pipeline 335; the pipeline 335 is further provided with a pressure detection device 332 and a pressure relief device 333, wherein the pressure detection device 332 is specifically a pressure sensor and is used for detecting the pressure in the vacuum-pumping region 301; the pressure relief device 333 is specifically an electric pressure relief valve, and when the electric pressure relief valve is opened, the vacuum-pumping region 301 is relieved. When a user carries out vacuum-pumping packaging, the vacuum pump 331 is started to carry out vacuum-pumping processing on the vacuum-pumping area 301, and when the pressure detection device 332 detects that the pressure of the vacuum-pumping area 301 reaches a set negative pressure value, the controller controls the vacuum pump 331 to stop. The vacuum degree of the vacuum-pumping area 301 can be controlled by arranging the pressure sensor, and the vacuum pump 331 can be switched on and off according to the detection value of the pressure sensor, so that the vacuum-pumping effect is ensured. After the vacuumizing and packaging operations are completed, the vacuumizing area 301 can be automatically controlled to be decompressed by opening the electric decompression valve, so that a user can take out the storage bag conveniently. In order to prevent the foreign matters in the vacuuming region 301 from entering the vacuum pump 331 through the pipeline 335, the pipeline 335 further includes a filter protection device, in one embodiment, as shown in fig. 8, the filter protection device is specifically a filter container 334 connected in series on the pipeline 335, an inlet and an outlet are provided at an upper end of the filter container 334, the inlet is communicated with the vacuuming region 301 through the pipeline 335, and the outlet is communicated with the vacuum pump 331 through the pipeline 335; foreign matters in the vacuuming zone 301 enter the filter container 334 through the pipeline 335 and remain at the bottom of the filter container 334, so that the foreign matters are prevented from entering the vacuum pump 331. In order to clean the filtering container 334 conveniently, more specifically, the filtering container 334 comprises a tank body with an opening and an upper cover detachably connected to the tank body, the upper cover is provided with the inlet and the outlet, the tank body can be detached for cleaning during cleaning, and the problem that the pipeline 335 is poor in sealing performance due to frequent disassembly and assembly of the pipeline 335 is solved.

In another embodiment, as shown in fig. 9, the filter protection device is a filter screen 336 disposed on the pipeline 335, and specifically, for convenience of assembly and disassembly, the filter screen 336 is disposed at a position of the vent hole 324 at a position where the upper support 320 is connected to the pipeline 335, and after a user moves the upper support 320 to a highest position, the filter screen 336 can be assembled and disassembled from a lower side or cleaned.

The connecting hole between the vacuum-pumping region 301 and the pipeline 335 may be one, and certainly, in order to avoid vacuum-pumping failure caused by foreign matters blocking the connecting hole in the vacuum-pumping region 301 when a single connecting hole is used, the pipeline 335 may be connected in parallel by arranging two or more connecting holes to be respectively connected with the pipeline 335, and connected with a main pipe by a three-way or multi-way connector; wherein, the pressure sensor and the electronic pressure relief valve are arranged on the main pipe.

As shown in fig. 4, the vacuum packaging apparatus 300 further includes a packaging region 302 located outside the vacuum-pumping region 301, the packaging region 302 is used for performing plastic packaging treatment on the storage bag after vacuum-pumping is finished, and a heat insulation pad 360 and a heating apparatus 370 are arranged in the packaging region 302 in an opposite manner; specifically, the heating device 370 is mounted in a groove on the lower surface of the upper support 320; the heat insulation pad 360 is installed in a groove on the upper surface of the lower support 310 of the upper support 320; after the upper support 320 is moved into the evacuated region 301, which forms a seal with the lower support 310, the insulation mat 360 within the encapsulated region 302 rests against the heating device 370. After the vacuum pumping is completed, the storage bag can be rapidly plastic-sealed through the heating device 370 in the packaging area 302, and after the set time length of the heating device 370 is set, the driving device 340 is controlled to drive the upper support 320 to move upwards, so that a user can draw out the storage bag to complete the plastic sealing of the storage bag.

More specifically, as shown in fig. 10 and 11, the heating device 370 includes a heating wire 371, a heat conducting plate 373 is disposed below the heating wire 371, and the heating area of the heating wire 371 is used for diffusing the heat conducting plate 373 so as to increase the plastic packaging area of the storage bag, so that the plastic packaging is firm. The heater strip 371 is followed the length direction of upper bracket 320 extends and the upper bracket 320 both sides are upwards bent, heater strip 371 extends to the free end of upper bracket 320 upside is fixed in through an insulation board 372 on the upper bracket 320, specifically, insulation board 372 is made for insulating material, and the shaping is the board of bending, the cladding in the outside of heater strip 371 avoids heater strip 371 to expose in the outside. Furthermore, two free ends of the heating wire 371 are respectively connected with two wires led out through the wiring terminal 374 through the spring 375; the heating wire 371 can be always in a tensioned state by arranging the spring 375, so that the flatness of the heating wire 371 is high, and the heat conduction plate 373 positioned at the lower side of the heating wire 371 is tightly contacted with a storage bag; the problem that the heating wire 371 is uneven, so that the contact of individual positions is not solid and plastic cannot be sealed is solved.

In the vacuum pumping plastic package, the driving device 340 may be an electric driving device or an air pressure driving device; the pneumatic driving device occupies a large space, and therefore, in this embodiment, the driving device 340 is an electric driving device. Specifically, as shown in fig. 7, 12 and 13, the driving device 340 includes a motor 341 and a transmission mechanism, the transmission mechanism is configured to convert the rotational motion of the motor into a linear motion, and an output end of the transmission mechanism is connected to the upper support. The transmission mechanism comprises a first gear 342 fixedly connected to the output shaft of the motor; a second gear 343 meshed with the first gear 342; a third gear 344 fixedly connected with the second gear 343, and an output rack 345 engaged with the third gear 344, wherein a pin hole is formed at a lower side of the output rack 345, and the upper support 320 and the output rack 345 are connected by a pin 346 inserted into the pin hole. Through the above-mentioned transmission mechanism, the rotation of the motor 341 is converted into the up-and-down movement of the upper support 320.

Specifically, as shown in fig. 7, a connecting plate 347 is disposed between the upper support 320 and the driving device 340, the connecting plate 347 is in threaded connection with the upper support 320, a guide groove 3471 is formed on the connecting plate 347, the lower end of the output rack 345 is inserted into the guide groove 3471, the lower ends of the guide groove 3471 and the output rack 345 are respectively provided with a long-strip-shaped pin hole, the pin 346 is inserted into the pin holes of the guide groove 3471 and the output rack 345, when the pin 346 is located at the lowest end of the pin hole, a gap is formed between the lower end surface of the output rack 345 and the bottom of the guide groove 3471, and an elastic body 348 is disposed in the gap.

As shown in fig. 12, in the initial position, the upper support 320 is located at the highest position; in the pressing stage, as shown in fig. 13, the driving device 340 drives the upper support 320 to move downward, and in order to ensure that the lower support 310 is tightly matched with the upper support 320, a set rotation stroke of the motor 341 is usually used as a signal for determining the in-place position, so that after the upper support 320 moves downward to contact the lower support 310 by disposing the elastic body 348 between the output rack 345 and the guide groove 3471, the output rack 345 can continue to move downward for a certain distance, so that the elastic body 348 is compressed, the motor 341 is prevented from being locked, the motor 341 is protected, and the pressing force can be kept stable.

In the vacuum-pumping stage, the sealed vacuum-pumping region 301 formed between the lower support 310 and the upper support 320 moves downward under the action of atmospheric pressure due to the low air pressure, and at this time, when the upper support 320 moves downward due to the existence of the elongated pin hole, the output rack 345 remains in place, thus protecting the entire driving device 340.

In order to accurately control the moving displacement of the upper support 320, whether the upper support 320 moves to the position is judged, so that the vacuum-pumping area 301 forms a sealed space; in an embodiment, the motor 341 is a stepping motor 341, and whether the upper support 320 moves in place is determined by detecting a rotation stroke of the stepping motor 341. In another embodiment, a micro switch is disposed on the lower support 310 or the upper support 320; after the upper support 320 moves to the right position, the controller controls the driving device 340 to stop and lock at the current position according to a feedback signal of the micro switch by triggering the micro switch. The driving device 340 can be provided as a single device, and the output gear is located in the middle area of the upper support 320, which is likely to cause the marginal area of the upper support 320 to be not tightly fitted with the lower support 310, resulting in air leakage of the vacuuming area 301; therefore, in order to provide the sealing property of the vacuuming region 301, the driving devices 340 are symmetrically disposed at both sides of the upper support 320. Correspondingly, one connecting plate 347 is provided, and the two guide grooves 3471 are provided on the connecting plate 347; the two output racks 345 respectively extend into the guide grooves 3471.

Specifically, as shown in fig. 6 and 7, the driving device 340 and the vacuum assembly 330 are mounted on the mounting seat 305 located on the upper side of the upper support 320. The upper support 320 is provided with a vent hole 324 for communicating with the vacuum pumping assembly 330. One side of the mounting base 305 is provided with three chambers, which include a vacuum pump mounting cavity 3051 located at the middle position and driving device mounting cavities 3052 located at the left and right sides. In order to maintain the overall aesthetic property of the outer surface of the refrigerator door 200 and the convenience of applying the vacuum packaging device 300, as shown in fig. 3, the door shell 210 is provided with an inwardly recessed mounting cavity 211, the driving device 340 is connected with the upper support 320 and then connected to the mounting base 305 through screws, the vacuum pumping assembly 330 is connected with the vent holes 324 on the upper support 320 and then mounted on the mounting base 305, after an assembly is formed, the assembly is integrally mounted in the mounting cavity 211 through screws penetrating through lugs on two sides of the mounting base 305, the modular assembly of each part is realized, each part is not exposed on the outer surface, and the integrity of the device is better.

When a user uses the vacuum packaging device 300 to carry out plastic packaging on a food bag, particularly when powdery food such as flour or liquid is subjected to plastic packaging, the powder or the liquid may enter the vacuum-pumping region 301 during vacuum-pumping and finally accumulate in the first open cavity 311 of the lower support 310; therefore, in order to facilitate the user to clean the food waste in the lower holder 310, the lower holder 310 is detachably mounted with respect to the door body 200.

The manner of mounting the lower holder 310 to the door body 200 is not exclusive, and in the present embodiment, as shown in fig. 14A to 14C, the lower holder 310 may be detachably mounted to the door body 200 from an inner side (i.e., a side having an inner container) of the door body 200. Since the door 200 of the refrigerator must ensure heat insulation, the lower holder 310 is provided with a heat-insulating small door 250 toward an inner portion of the storage chamber 100. As shown in fig. 14C, the door body 200 is provided with a mounting hole 201 communicating the inside and the outside, and the lower holder 310 and the heat-insulating small door 250 are inserted into the mounting hole 201 from the inside of the door body 200, so that the disassembly and cleaning of the lower holder 310 and the heat-insulating performance of the door body 200 are realized.

In one embodiment, as shown in fig. 15, the lower support 310 is integrally formed with the heat-insulating wicket 250; as shown in fig. 16 and 17, the lower holder 310 and the heat-insulating wicket 250 are formed by a first housing 251 and a second housing 252 having an open cavity structure and a heat insulator disposed between the first housing 251 and the second housing 252. The first housing 251 is connected with the second housing 252 in a snap-fit manner, an extension arm 2511 is disposed in the first housing 251 in a direction away from the second housing 252, the lower support 310 is formed on the extension arm 2511, the first opening cavity 311 is an opening groove formed on the upper side of the extension arm 2511, and a first sealing groove 313 is disposed on the periphery of the opening groove.

In order to further ensure the heat insulation of the door body 200 and prevent the cold leakage through the gap between the mounting hole 201 and the small heat-insulating door 250, as shown in fig. 16 and 17, a small door seal 253 is provided between the small heat-insulating door 250 and the door body inner 220. Specifically, a support arm 2512 is arranged at a position where the first housing 251 is matched with the door body inner container 220, and the size of the support arm 2512 is larger than that of the mounting hole 201. The support arm 2512 is provided with a mounting groove surrounding the mounting hole 201, and the small door seal 253 is mounted in the mounting groove.

Specifically, in order to ensure that the small heat-preservation door 250 is reliably fixed to the door body 200, a locking device 400 is arranged between the small heat-preservation door 250 and the door body inner container 220, and the locking device 400 is used for locking or unlocking the small heat-preservation door 250 to the door body 200.

As shown in fig. 14A to 14C, 16 and 17, the locking device 400 includes: set up and be in latch hook subassembly on the little door 250 that keeps warm, and set up locking groove 221 on the internal container 220 of door, the latch hook subassembly is including wearing to locate latch hook on the little door 250 that keeps warm, the latch hook can be in primary importance and second position conversion, the latch hook can with locking groove 221 cooperation is realized when primary importance the locking of little door 250 that keeps warm, the latch hook when the second place with locking groove 221 breaks away from, realizes the unblock of little door 250 that keeps warm.

Specifically, in order to improve the reliability of the locking device 400, two locking grooves 221 and two locking hooks are respectively provided, wherein the locking grooves 221 are located at upper and lower sides of the mounting hole 201. As shown in fig. 15-20, the latch hook assembly includes upper and lower latch hooks 420 and 410 and a return spring 430. As shown in fig. 19, the lower latch hook 410 includes a hook portion 414 engaged with the locking groove 221 on the lower side, a hinge portion 412 rotatably connected to the thermal door 250, and a handle portion 411 positioned on the lower side of the thermal door 250, wherein the handle portion 411 and the hook portion 414 are respectively positioned on both sides of the hinge portion 412. The lower latch hook 410 further includes a lower connection part 413 connected to the upper latch hook 420, wherein the lower connection part 413 extends above the handle part 411. Specifically, an end of the lower connection part 413 is formed as a T-shaped protrusion 4131. As shown in fig. 20, the upper latch hook 420 includes a hook 421 engaged with the locking groove 221 on the upper side, and an upper connection part 423 connected to the lower latch hook 410. Specifically, the lower end of the upper connecting portion 423 is formed as an open groove 4231, and the T-shaped protrusion 4131 is inserted into the open groove 4231 to connect the upper locking hook 420 and the lower locking hook 410. The return spring 430 is arranged between the upper lock hook 420 and the upper end surface of the small heat-preservation door 250. More specifically, a connecting shaft 422 is formed on the upper locking hook 420, and the return spring 430 is sleeved on the connecting shaft 422.

As shown in fig. 17, a guide positioning portion is formed on an inner surface of the second housing 252, the upper connecting portion 423 is snapped on the guide positioning portion, and the upper latch hook 420 can slide along the guide positioning portion. Specifically, the guiding and positioning portion is a hook 2521 formed on the inner surface of the second housing 252, and the hook 2521 is located on both sides of the upper connecting portion 423 and extends a certain distance in the up-down direction. The upper connecting portion 423 is connected between the two hooks 2521.

In an initial state, under the action of the elastic force of the return spring 430, the upper latch hook 420 and the lower latch hook 410 are located at the first position to realize the locking of the small heat-preservation door 250 and the door body inner container 220; when a user pulls the lower locking hook 410 with a hand, the lower locking hook 410 rotates around the hinge part 412, the hook part 414 moves downward to be separated from the lower locking groove 221, meanwhile, the connecting part pushes the upper locking hook 420 upward to move, the upper locking hook 420 is separated from the upper locking groove 221, and the upper locking hook 420 and the lower locking hook 410 are located at the second position to unlock the heat-insulating small door 250 and the door body inner container 220.

In order to ensure the aesthetic appearance of the refrigerator door 200, referring to fig. 1 and 2, a bar counter door 260 is arranged on the refrigerator door 200 at the area where the vacuum packaging device 300 is located, and the lower end of the bar counter door 260 is hinged to the door 200 and can be turned over to a position perpendicular to the surface of the door shell 210; the upper end of the bar counter door 260 is connected to the door body housing 210 through a first push switch 212. By adopting the bar counter door 260 structure, the storage bag containing food can be placed on the bar counter door 260 and then vacuum packaging treatment is carried out under the state that the bar counter door 260 is opened, thereby facilitating the operation of a user. When the bar door 260 is closed, the appearance beauty of the door body 200 is ensured.

The inside of the bar counter door 260 further comprises an operation panel 270 covering the outside of the installation cavity, a socket 271 is formed on the operation panel 270, and the lower surface of the socket 271 is flush with the upper surface of the first opening cavity 311. Thus, the vacuum packaging apparatus 300 can be entirely hidden behind the operation panel 270. When a user performs vacuum plastic packaging, the opening of the storage bag can be directly inserted from the insertion port 271 of the operation panel 270 and directly extend to the upper surface of the first open cavity 311, and when the upper support 320 moves downwards, the opening of the storage bag can be placed in the vacuum-pumping area 301. Specifically, the operation panel 270 is detachably connected to the door housing 210. The operation panel 270 is further provided with a display and control device 272, and the display and control device 272 includes an indicating device for displaying the working state of the vacuum packaging apparatus 300; and a control button for controlling the start or stop of the vacuum packaging apparatus 300. The user can determine whether the bag can be drawn out according to the operation state of the vacuum sealing apparatus 300 displayed by the display and control unit 272. The display control device 272 may include a "vacuum plastic envelope" button, a "seal" button, a "manual vacuum" button, and a "stop" button; wherein, clicking the button of vacuum pumping and plastic packaging can realize the vacuum pumping process and the plastic packaging process by one key; the sealing operation of the independent storage bag can be realized by clicking the sealing button, and the manual vacuum pumping treatment can be realized by clicking the manual vacuum pumping button. For example, a "manual vacuum" button may be configured to automatically pump a few seconds at a time and then pump again until the user believes that the vacuum is complete. Or the user can press the manual vacuumizing button all the time, the button can be vacuumized all the time when being pressed all the time, and the vacuumizing can be stopped when the user stops pressing the manual vacuumizing button, so that the manual vacuumizing operation of the user is realized. When the 'stop' button is clicked, the process of air leakage and upper support lifting is executed, and when the vacuumizing process is carried out, the user thinks that the vacuumizing packaging device determines that vacuumizing is abnormal at the moment, the user realizes the process of ending vacuumizing in advance by clicking the 'stop' button.

The vacuum-pumping packaging work flow of the vacuum packaging device is as follows, and the work flow can comprise an upper support descending flow, a vacuum-pumping plastic packaging flow, an air leakage flow and an upper support ascending flow.

The specific process of descending the upper support 320 is shown in fig. 21, and includes:

in step 101, the upper support 320 is lowered at a first speed for a first stage.

Step 102, determining whether the upper support 320 is lowered to a first preset distance, if so, turning to step 103; if not, go to step 101.

The upper support 320 is lowered to a first preset distance at a first speed until the sealing ring of the upper support 320 is in contact with the sealing ring of the lower support 310; the upper support is rapidly lowered towards the lower support 310 at a higher first speed, so that the time for the vacuum plastic packaging process is shorter.

In step 103, the upper support 320 is lowered at a second speed in a second stage.

And 104, judging whether the upper support 320 descends to a second preset distance, if so, turning to 105, and otherwise, turning to 103. Wherein the second speed is less than the first speed.

When the upper support 320 descends to a second preset distance, the deformation of the sealing ring on the upper support 320 and the sealing ring on the lower support 310 reaches a preset value, and the set deformation is enough to seal the vacuumized area; the upper support 320 moves towards the lower support 310 at a second speed under the driving of the driving device, which is a slow descending stage, the speed of the driving device is reduced, and the acting force is increased to ensure the tightness of the upper support 320 and the lower support 310.

When the upper support 320 is determined to descend to a first preset distance, starting a vacuumizing plastic packaging process; a specific process can be shown in fig. 22, which includes:

step 201, starting a vacuum pump;

step 202, determining whether the pressure value of the vacuumized area 301 reaches the first pressure value, if so, turning to step 207, otherwise, turning to step 203.

The pressure detecting means may determine whether the pressure value of the vacuuming region 301 reaches a first pressure value, and the vacuum pump 331 may stop vacuuming after determining that the first pressure value is reached.

Step 203, determining whether the vacuumizing time reaches a preset vacuumizing time, if so, turning to step 207, otherwise, turning to step 204.

It is determined whether the vacuum pumping time reaches a preset vacuum pumping time, and when the preset vacuum pumping time is reached, the vacuum pump 331 may also stop the vacuum pumping.

Step 204, determining whether the pressure value in the vacuumized area 301 reaches a second pressure value, wherein the second pressure value is smaller than the first pressure value; if yes, go to step 205, otherwise go to step 202.

Step 205, determining that the pressure value in the vacuumized area 301 is changed to be smaller than a third pressure value after the preset time, wherein the third pressure value is smaller than the second pressure value; if yes, go to step 206, otherwise go to step 202.

When the pressure value in the vacuumization area 331 detected by the pressure detection device reaches the second pressure value and the pressure value is changed to be smaller than the third pressure value after the preset time, it is determined that the vacuumization process is abnormal, for example, the sealing of the pressing bar is not good, or foreign matters enter, the sealing is folded, the bag is broken, and the like, and the vacuumization needs to be finished in advance.

And step 206, stopping vacuumizing, decompressing the vacuumizing area, and opening the vacuumizing area 301.

After the vacuum pumping is determined to be abnormal, the vacuum pump 331 can stop the vacuum pumping, and the vacuum pumping area 301 is decompressed through the decompression device.

And step 207, stopping vacuumizing, and sealing and heating.

And after the vacuumizing step is finished, controlling the vacuum pump to stop, controlling the heating wire to work, and carrying out hot-melting plastic package on the storage bag.

And step 208, after the heating operation of the seal reaches the heating time, delaying the first time to enter the air leakage stage.

After the sealing heating device heats and plastically seals the storage bag for heating time, the air leakage stage can be started after the first time delay. The heating time and the first time may be set empirically.

The specific flow of the above-mentioned air release and the upper support raising can be shown in fig. 23, which includes:

and 301, performing air leakage operation on the air leakage device. And the pipeline is deflated by opening the deflation valve.

Step 302, the air leakage device determines whether air leakage exceeds air leakage time, if so, step 303 is carried out, otherwise, step 301 is carried out. The deflation time may be set empirically.

Step 303, the driving device controls the upper support 320 to ascend.

The driving means may drive the upper support 320 to move upward at a third speed, being separated from the lower support 320, thereby opening the vacuum-pumping region 301.

And step 304, judging whether the upper support 310 ascends to reach the set step number, if so, ending, otherwise, turning to step 301.

After the upper support 310 is raised to the set number of steps, it is ready for the next evacuation packaging operation. The set number of steps may be to reach the starting position of the upper evacuated region 301.

It should be noted that the first speed is greater than the second speed, the third speed is greater than the second speed, the first preset distance, the second preset distance, the first speed, the second speed, and the third speed may be set empirically, and the first preset distance and the second preset distance may be implemented by controlling a preset number of steps of the electric motor.

Example 2

The present embodiment 2 has substantially the same structure as the embodiment 1, except for the connection manner of the lower holder 310 and the thermal insulating wicket 250. Specifically, in this embodiment, as shown in fig. 24A and 24B, the lower holder 310 is detachably attached to the thermal door 250. The thermal wicket 250 is formed of a first case 251 and a second case 252 having an open cavity structure and an insulator disposed between the first case 251 and the second case 252 as shown in fig. 25. The first housing 251 is connected with the second housing 252 in a snap-fit manner, the first housing 251 is provided with an extension arm 2511 in a direction away from the second housing 252, and the lower support 310 is detachably connected to the extension arm 2511.

Specifically, a first limiting portion extending upwards is formed at the end of the extension arm 2511, a second limiting portion matched with the first limiting portion is formed at the lower side of the lower support 310, and the first limiting portion and the second limiting portion are matched to position the lower support 310 on the extension arm 2511. More specifically, the first limiting portion is a limiting plate, the limiting portion is a baffle formed at the bottom of the lower support 310 and extending downwards, the baffle is inserted into the inner side of the limiting plate to install the lower support 310 on the extension arm 2511, and the problem that the sealing of the vacuum pumping area is not tight due to the fact that the lower support 310 moves in the horizontal direction is avoided.

In order to further ensure the heat insulation of the door body 200 and avoid the cold leakage through the gap between the mounting hole 201 and the small heat-insulating door 250, a small door seal 253 is arranged between the small heat-insulating door 250 and the door body inner container 220. Specifically, a support arm 2512 is arranged at a position where the first housing 251 is matched with the door body inner container 220, and the size of the support arm 2512 is larger than that of the mounting hole 201. The support arm 2512 is provided with a mounting groove surrounding the mounting hole 201, and the small door seal 253 is mounted in the mounting groove.

Specifically, in order to ensure that the small heat-insulating door 250 is reliably fixed to the door body 200, a locking device 400 is provided between the small heat-insulating door 250 and the door body inner container 220.

As shown in fig. 25, the locking device 400 includes: the locking hook 440 is hinged to the bottom of the small heat-preservation door 250, and the middle part of the locking hook 440 is provided with a hinged shaft for connecting with the small heat-preservation door 250 and is connected to the small heat-preservation door 250; the door further comprises a locking groove which is formed on the door body inner container 220 and matched with the locking hook; and a reset torsion spring 450 sleeved on the hinge shaft; one leg of the reset torsion spring is abutted against the small heat preservation door 250, and the other leg of the reset torsion spring is abutted against the locking hook 440; in the initial state, the torsion of the return torsion spring 450 is suitable for the latch hook 440 to be at the first position, so that the heat-preservation wicket 250 can be mounted on the door body.

Specifically, in order to improve the aesthetic property of the small door, a mounting groove is formed at the bottom of the small door, and the lock hook is mounted inside the mounting groove. Fig. 24A and 24B show a process of detaching the thermal door 250 and the lower holder 310. When the small heat-preservation door 250 and the lower support 310 are mounted on the door body 200, the locking hooks are matched with the locking grooves, so that the locking state of the small heat-preservation door 250 is realized; when the heat-insulating small door 250 and the lower support 310 need to be disassembled, the locking hook is pulled to be away from the locking groove, the locking device 400 is in an unlocking state, the heat-insulating small door 250 and the lower support 310 are pulled out, and the lower support 310 is taken out of the heat-insulating small door 250 to clean the lower support 310. In this embodiment, the lower support 310 is detachably connected to the heat-insulating wicket 250, so that the lower support 310 can be cleaned more easily and conveniently.

Example 3

The structure of the present embodiment 2 is substantially the same as that of the present embodiment 1, except for the connection manner of the lower holder 310 and the heat-insulating small door 250 with the door body 200.

As shown in fig. 26A to 26C, the lower support 310 and the small heat-insulating door 250 are arranged independently, a limiting portion for limiting the position of the lower support 310 is arranged at the lower side of the mounting hole 201, one end of the lower support 310 abuts against the limiting portion, and the other end of the lower support 310 abuts against the small heat-insulating door 250. The heat-insulating small door 250 can be mounted on the door body 200 by using the locking device 400 in embodiment 1 or embodiment 2.

Example 4

The present embodiment 4 has substantially the same structure as that of the embodiment 1, except for the structure of the door body 200 at the region where the vacuum sealing apparatus 300 is located.

Specifically, in the present embodiment, referring to fig. 27 and 28, in order to ensure the aesthetic appearance of the refrigerator door 200 and prevent the vacuum sealing device 300 from being exposed outside the door 200, a sub-door 280 is disposed at a region of the door 200 where the vacuum sealing device 300 is located, the width of the sub-door 280 is the same as that of other regions of the door 200, the sub-door 280 is connected to the region by means of clamping or bonding, and the surface of the sub-door 280 is flush with the surface of the other regions of the door 200. The sub-door 280 is formed with a socket 281, and a lower surface of the socket 281 is flush with an upper surface of the first open cavity 311. When a user performs vacuum plastic packaging, the opening of the storage bag can be directly inserted from the insertion port 281 of the sub-door plate 280 and directly extend to the upper surface of the first open cavity 311, and when the upper support 320 moves downwards, the opening of the storage bag can be placed in the vacuum-pumping area 301. The auxiliary door panel 280 is further provided with a display and control device 282, and the display and control device 282 comprises an indicating device for displaying the working state of the vacuum packaging device 300; and a control button for controlling the start or stop of the vacuum packaging apparatus 300. The user can determine whether the bag can be withdrawn based on the operating state of the vacuum packaging apparatus 300 displayed by the indicating means.

Example 5

The present embodiment 5 has substantially the same structure as the embodiment 1, except for the manner in which the lower holder 310 is mounted to the door body 200.

Specifically, as shown in fig. 29 to 31, in the present embodiment, the lower holder 310 is detachably attached to the door body 200 from the outside of the door body 200.

More specifically, the lower holder 310 is detachably connected to the door body 200 in a spring-pushing manner. As shown in fig. 29 and 30, a second push switch 380 is disposed on a connection surface of the lower holder 310 and the door body 200, and the second push switch 380 includes a push latch 381 and a lock catch 382; a groove provided with the lock 382 is formed on the inner side surface of the lower support 310, and the push latch 381 is fixed on the outer surface of the door body 200.

As shown in fig. 32A, when the lower holder 310 is pushed in the vertical direction of the door body 200, the push latch 381 engages with the lock catch 382, and the lower holder 310 is mounted on the door body 200; as shown in fig. 32B, when the lower holder 310 is pushed again, the push latch 381 releases the latch 382, so that the lower holder 310 can be removed from the door body 200. The user can clean the lower support 310 alone, which is convenient for the user to operate.

Example 6

The present embodiment 6 has substantially the same structure as the embodiment 5, except for the manner in which the lower holder 310 is mounted to the door body 200.

Specifically, in the present embodiment, as shown in fig. 33A and 33B, the lower holder 310 is detachably attached to the door body 200 from the outside of the door body 200.

More specifically, the lower holder 310 is detachably connected to the door body 200 in a snap-fit manner. The lower support 310 and the door body 200 are respectively formed with a first clamping portion 391 and a second clamping portion 392 which are matched with each other, wherein the first clamping portion 391 is formed on the lower surface of the lower support 310, specifically, is a bending hook, and the second clamping portion 392 is fixedly connected to the front side surface of the door body 200. The lower support 310 moves in the direction close to the door body 200 until the first clamping portion 391 and the second clamping portion 392 are matched to realize the installation of the lower support 310; when the device is detached, the lower support 310 is pulled outwards, the first clamping portion 391 and the second clamping portion 392 are elastically deformed to separate the two, and a user can clean the lower support 310 independently, so that the device is convenient for the user to operate.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a refrigerator, is including setting up the vacuum packaging device in the door body outside which characterized in that: the vacuum packaging apparatus includes:

the upper side of the lower support is provided with a first open cavity and a sealing ring surrounding the first open cavity; the lower side of the upper support is correspondingly provided with a second open cavity and a sealing ring surrounding the second open cavity, and the upper support can move towards or away from the lower support under the driving of a driving device; the upper support moves to a sealing ring on the upper support and contacts with a sealing ring on the lower support at a first speed, then moves to the lower support at a second speed until the sealing ring has a set deformation amount, and then stops, and the first open cavity and the second open cavity are in butt sealing to form a vacuumizing area; wherein the first speed is greater than the second speed;

the vacuumizing assembly is communicated with the vacuumizing area through a pipeline and is used for vacuumizing or decompressing the vacuumizing area;

the driving device comprises a motor and a transmission mechanism, the transmission mechanism is used for converting the rotary motion of the motor into linear motion, and the output end of the transmission mechanism is connected with the upper support; the transmission mechanism comprises a gear rack transmission mechanism, a pin hole is formed in the lower side of an output rack of the gear rack transmission mechanism, the upper support is connected with the output rack through a pin shaft inserted into the pin hole, and the pin hole is a long hole extending along the longitudinal direction;

the connecting plate is arranged between the upper support and the driving device and is in threaded connection with the upper support, a guide groove is formed in the connecting plate, the lower end of the output rack is inserted in the guide groove, and the pin shaft penetrates through the guide groove and the pin hole of the output rack.

2. The refrigerator according to claim 1, wherein: the vacuum packaging device also comprises a packaging area, wherein the packaging area comprises a heating wire positioned on the lower side of the upper support and a heat insulation pad positioned on the upper side of the lower support; and when the pressure in the vacuumizing area meets a preset condition, the heating wire performs hot-melt plastic package on the storage bag inserted in the packaging area.

3. The refrigerator according to claim 2, wherein: the vacuum pumping assembly comprises a vacuum pump; and a pressure detection device for detecting the pressure in the vacuum-pumping area; after the upper support and the lower support are in butt joint and sealed, starting the vacuum pump; and when the pressure value detected by the pressure detection device is smaller than a first preset value, closing the vacuum pump.

4. The refrigerator according to claim 3, wherein: the vacuum-pumping device also comprises a pressure relief device communicated with the vacuum-pumping area through a pipeline; after the heating wire works for a set time, the pressure relief device is used for relieving the vacuum, and after the pressure relief of the pressure relief device is finished for the set time, the upper support moves upwards at a third speed under the driving of the driving device until the upper support returns to the initial position; wherein the third speed is greater than the second speed.

5. The refrigerator according to any one of claims 1 to 4, wherein: the rack and pinion drive mechanism includes: a first gear fixedly connected to an output shaft of the motor; a second gear meshed with the first gear; the third gear is fixedly connected with the second gear, and the output rack is meshed with the third gear.

6. The refrigerator according to any one of claims 1 to 4, wherein: when the pin shaft is arranged at the lowest end of the pin hole, a gap is formed between the lower end face of the output rack and the bottom of the guide groove, and an elastic body is arranged in the gap.

7. The refrigerator according to any one of claims 1 to 4, wherein: the two driving devices are symmetrically arranged on two sides of the upper support, one connecting plate is arranged, and the two guide grooves are formed in the connecting plate; the two output racks respectively extend into the guide grooves.

8. The refrigerator according to any one of claims 1 to 4, wherein: the driving device and the vacuumizing assembly are installed on a mounting seat, an inward-sunken mounting cavity is formed in the door body shell, and the mounting seat and the upper support seat are installed in the mounting cavity.