CN111207553A

CN111207553A - Refrigerator with a door

Info

Publication number: CN111207553A
Application number: CN202010048061.0A
Authority: CN
Inventors: 许锦潮; 张树栋; 申乃雨; 李利云; 张秋菊
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-05-29

Abstract

The invention provides a refrigerator, which comprises a box body for limiting a storage room, a low-pressure storage unit accommodated in the storage room, a main air duct formed in the box body, and a first air duct communicated with the main air duct and formed on the wall of the low-pressure storage unit, wherein low-temperature air flows through the wall of the low-pressure storage unit corresponding to the first air duct; according to the invention, the first air duct enables low-temperature air to flow through the wall of the low-pressure storage unit where the first air duct is located so as to cool the low-pressure storage unit, so that the low-pressure storage unit can maintain a low-temperature environment with lower temperature relative to other positions of the refrigerating chamber, and the refrigerating and fresh-keeping effects of the low-pressure storage unit are enhanced.

Description

Refrigerator with a door

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator.

Background

Refrigerators occupy an important share of the market as indispensable electric appliances in home life. With the increasing requirements of consumers on the quality of fresh food, the requirements on refrigerators are also increasing, and refrigerators are required to have higher configuration and stronger functions, and especially, it is desirable that the stored fresh food can have a longer storage period, so that the freshness of food materials is ensured, and the loss of nutritional ingredients is prevented.

In order to better store food, it has been developed to provide a vacuum chamber in a refrigerator, and a vacuum-pumping device is used to evacuate the vacuum chamber to remove oxygen in the vacuum chamber, so as to prevent food from deteriorating and prolong the storage time of food. The activity of microorganisms can be reduced in a low-temperature environment, and the preservation effect is improved. However, the area in the same space with the vacuum chamber in the refrigerator is in the same temperature environment, and although the temperature can meet the general fresh-keeping and refrigerating requirements, the fresh-keeping effect of the vacuum chamber can be reduced.

The invention is provided in view of the above.

Disclosure of Invention

The invention provides a refrigerator aiming at the technical problems.

In order to achieve the purpose, the invention adopts the technical scheme that:

a refrigerator, comprising:

a cabinet defining an insulated storage compartment; a main air duct is arranged in the storage room and used for conveying cold air to the storage room;

the low-pressure storage unit is accommodated in the storage room, and air can be pumped into the low-pressure storage unit to form air pressure lower than the external atmospheric pressure of the box body so as to be beneficial to keeping food fresh;

the wall of the low-pressure storage unit is provided with a first air duct, and the first air duct is communicated with the main air duct so that low-temperature air flows through the wall of the low-pressure storage unit provided with the first air duct.

Preferably, a groove is formed on the wall of the low-pressure storage unit, and a mounting table surrounding the inner wall of the groove is arranged in the groove; the mounting table is provided with an air duct cover, and the air duct cover is matched with the groove to limit the first air duct.

Preferably, a plurality of partition plates are arranged in the groove, and the extension directions of the partition plates and the groove are consistent.

Preferably, the partition board and the mounting platform share the same end face, and the mounting platform and the partition board jointly support the air duct cover.

Preferably, the groove comprises a second groove section which is close to the front end of the low-pressure storage unit and parallel to the front end surface of the low-pressure storage unit, and two ends of the second groove section extend backwards to form a first groove section and a third groove section which are parallel; the first groove section, the second groove section and the third groove section are communicated in sequence; the shape of the air duct cover is consistent with that of the groove.

Preferably, the two groove walls of the second groove section are provided with clamping holes, and the air duct cover is provided with clamping plates matched with the clamping holes.

Preferably, screw holes are arranged on the shell walls of the rear end part of the low-pressure storage unit, which are close to the first groove section and the third groove section; the fixing plate is arranged on the edge of the air duct cover, the fixing plate is provided with fixing holes matched with the screw holes, and the air duct cover is fixed with the shell wall of the low-voltage storage unit through screws.

Preferably, the first air duct is flat.

Preferably, the projected area of the first air duct on the wall of the low-pressure storage unit is recorded as S₁And the area of the shell wall of the first air duct on the low-pressure storage unit is marked as S₂，S₁：S₂∈[0.2，1]。

Preferably, a distance between a foremost end of the first air duct and a foremost end of the low pressure storage unit is denoted as L₁And the length of the low-pressure storage unit in the front-back direction is marked as L₂，L₁：L₂∈[0.2，1]。

Compared with the prior art, the invention has the advantages and positive effects that:

Drawings

FIG. 1 is a schematic view of the overall structure of a refrigerator according to the present invention;

fig. 2 is an exploded view of a low pressure storage unit of the refrigerator of the present invention;

fig. 3 is a perspective view of a case of the refrigerator of the present invention;

fig. 4 is a perspective view of another angle of the case of the refrigerator of the present invention;

fig. 5 is a schematic view of the overall structure of a low pressure storage unit of a refrigerator according to the present invention;

FIG. 6 is an enlarged view of area A in FIG. 5;

FIG. 7 is a schematic view of the low pressure storage unit when the door and the housing of the refrigerator are in the closed position but not locked;

FIG. 8 is a partial cross-sectional view of a low pressure storage unit of the present invention with the door and the housing in a closed position but not locked;

FIG. 9 is a partial cross-sectional view of another position of the low pressure storage unit when the door and the housing of the refrigerator of the present invention are in a closed position but not locked;

FIG. 10 is a schematic structural view of a low-pressure storage unit when a door of a refrigerator is locked with a housing according to the present invention;

FIG. 11 is a partial cross-sectional view of a schematic view of a low pressure storage unit when a door of a refrigerator according to the present invention is locked with a housing;

FIG. 12 is a partial cross-sectional view of another position of the low pressure storage unit when the door of the refrigerator is locked with the housing in accordance with the present invention;

FIG. 13 is a schematic structural view of the low pressure storage unit when the door of the refrigerator is unlocked from the housing and is separated from the housing;

fig. 14 is an overall structure view of a case of a refrigerator according to the present invention;

FIG. 15 is a schematic view of another angle of the refrigerator casing according to the present invention;

FIG. 16 is a schematic view of another angle of the refrigerator casing according to the present invention;

FIG. 17 is a schematic view of another angle of the refrigerator casing according to the present invention;

FIG. 18 is a schematic view of an air duct cover of the refrigerator according to the present invention;

fig. 19 is a schematic structural view of another angle of the air duct cover of the refrigerator according to the present invention.

In the above figures: a refrigerator 1; a box body 2; a housing 2 a; an inner container 2 b; a housing 4; a reinforcing rib 40; an upper case 41; a top wall 41 a; an upper rear wall 41 b; a first upper side wall 41 c; a second upper side wall 41 d; a lower case 42; a bottom wall 42 a; a lower case 42; a lower rear wall 42 b; a first lower sidewall 42 c; the second lower side wall 42 d; a front end wall 42 e; the abutment surface 43; a door body 5; a front surface 5 a; a housing chamber 51; the second positioning bar 51 a; a storage container 52; a connecting member 22; a bump 23; a first fitting portion 6; a lock wall 61; a guide block 62; the guide wall 62 a; a second fitting portion 7; a lock plate 71; the upright 72; a first air duct 3; a recess 31; a mounting table 32; an air duct cover 33; a chucking plate 33 a; a fixed plate 33 b; a first groove segment 31 a; a second groove segment 31 b; a third slot segment 31 c; the chucking holes 31 d; a partition 34; a rod body 10; a fixed channel 25; a shifting block 24; connecting block 24 a; a toggle handle 24 b; a first positioning bar 24 c; a third positioning bar 24 d; a freshness retaining container 11; a refrigerating compartment 12; a decorative cover 13; a low pressure storage chamber 14; the access port 14 a; a low-pressure storage unit 15; a relief hole 17; an inflation channel 18; and a pressure relief member 19.

Detailed Description

The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the scope of the present invention as claimed is not limited to the scope described in the specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Fig. 1 to 13 are schematic views illustrating a locking mechanism of a low pressure storage unit of a refrigerator; referring to fig. 1-13, a refrigerator 1, the refrigerator 1 includes a heat-insulating box 2, the box 2 includes a casing 2a, an inner container 2b and a heat-insulating layer (not shown) therebetween. The cabinet 2 defines a plurality of insulated storage compartments to store food and the like. In the present embodiment, the storage compartments are a refrigerating compartment 12 located at an upper portion and a freezing compartment located at a bottom portion, respectively. The storage compartments are closable by respective corresponding door. The refrigerating chamber 12 is provided with a refrigerating side-by-side door, and the freezing chamber is provided with a freezing side-by-side door.

It should be understood that the invention should not be limited to a particular distribution of the storage compartments of the refrigerator 1, but that the invention may also be applied to other forms of refrigerator 1, such as a refrigerator 1 with a drawer door, etc.

The refrigerator 1 has an evaporative refrigeration system forming a closed loop. The refrigeration system includes at least a compressor (not shown), a condenser (not shown), a throttle device (not shown), and an evaporator (not shown). Since such a refrigeration system is well known in the art, further description thereof is omitted. Of course, other types of refrigeration systems (e.g., absorption refrigeration systems, thermoelectric refrigeration systems) may be used with the refrigerator 1.

The refrigerator 1 is provided with a low pressure storage unit 15 which can be maintained in a low pressure state and an air extracting means for extracting air from the inside of the low pressure storage unit 15. The air-extracting means may include a vacuum pump and a pipe connected between the vacuum pump and the low pressure storage unit 15.

In the present embodiment, the low pressure storage unit 15 is provided inside the refrigerating compartment 12. It should be understood that in other embodiments, the low-pressure storage unit 15 may be disposed in other storage compartments, such as a temperature-changing compartment whose temperature range is switchable between a cold-storage temperature zone and a cold-storage temperature zone.

The low pressure storage unit 15 is located at the bottom of the refrigerating chamber 12 and supported on the bottom wall of the refrigerating chamber 12. A fresh-keeping container 11 which has high humidity and is suitable for keeping foods such as vegetables and the like can be arranged at the adjacent position of the low-pressure storage unit 15; the low pressure storage unit 15 is provided at the bottom of the refrigerating chamber 12 in parallel with the fresh food container 11.

The low pressure storage unit 15 may be assembled in the cabinet 2 after being constructed independently of the cabinet 2. Referring to fig. 2 to 4, in the present embodiment, the low pressure storage unit 15 has a substantially flat rectangular parallelepiped shape, and the sum of the width of the low pressure storage unit 15 and the width of the fresh food container 11 is slightly smaller than the width of the refrigerating compartment 12, so that the bottom space of the refrigerating compartment 12 is effectively allocated such that the fresh food container 11 and the low pressure storage unit 15 can be inserted into or pulled out of the refrigerating compartment 12.

The low pressure storage unit 15 includes a housing 4 fixed in the refrigerating chamber 12 and a door 5 connected to the housing 4 and movable into and out of the refrigerating chamber 12.

Referring to fig. 2 to 4, the housing 4 has a box-shaped structure defining a flat low-pressure storage compartment 14 having a food access opening 14 a. In this embodiment, the access opening 14a is located at the front end of the housing 4 facing the user.

The outer side of the box wall of the shell 4 is provided with a latticed reinforcing rib 40 to increase the box wall strength of the shell 4 and avoid the deformation of the shell 4 caused by the difference between the internal pressure and the external pressure after the vacuum pumping.

The casing 4 includes an upper casing 41 and a lower casing 42 connected to form the low pressure storage chamber 14, the upper casing 41 and the lower casing 42 being ultrasonically welded together; specifically, the lower casing 42 includes a bottom wall 42a, a first lower side wall 42c, a lower rear wall 42b, a second lower side wall 42d, and a front end wall 42e located at the front end of the lower casing 42 and forming the access opening 14a, which are sequentially connected to the edge of the bottom wall 42 a; wherein the bottom wall 42a of the lower case is the bottom wall of the low pressure storage unit 15. In this embodiment, the front end wall 42e may have a flat abutting surface 43 substantially perpendicular to the horizontal plane for abutting against the door body 5.

The upper housing 41 includes a top wall 41a, and an upper rear wall 41b, a first upper sidewall 41c, and a second upper sidewall 41d sequentially connected to the edge of the top wall 41 a; the distances between the top wall 41a and the lower wall surfaces of the first upper side wall 41c and the second upper side wall 41d of the upper case 41 decrease linearly from the rear to the front, and decrease to 0 at the front end edge of the top wall 41 a. Namely, the projections of the first upper sidewall 41c and the second upper sidewall 41d on the plane perpendicular to the top surface are triangular.

Wherein, the upper back wall 41b is matched with the lower back wall 42b, the first lower side wall 42c is matched with the first upper side wall 41c, and the second lower side wall 42d is matched with the second upper side wall 41 d; the front end portion of the top wall 41a is fitted to the front end wall 42e of the lower casing 42, and the above abutting positions are welded and fixed by ultrasonic welding to fixedly connect the upper casing 41 and the lower casing 42 to form the low-pressure storage chamber 14. The above ultrasonic welding effectively improves the joining strength of the upper case 41 and the lower case 42, and ensures the airtightness of the entire case 4. Further, the access opening 14a of the case 4 is formed in the front end wall 42e of the lower case 42, so that the access opening 14a of the case 4 is integrated, and the airtightness of the case 4 is effectively ensured. Moreover, the distances between the top wall 41a and the lower wall surfaces of the first upper sidewall 41c and the second upper sidewall 41d are linearly decreased from back to front, and are decreased to 0 at the front end edge of the top wall 41a, so that the number of the abutting surfaces of the upper housing 41 and the lower housing 42 is decreased, the overall air tightness of the housing 4 is improved, and particularly, the air tightness of the housing 4 at the access opening 14a is improved. On the other hand, the housing 4 is provided as a separate structure of the upper housing 41 and the lower housing 42, which facilitates processing of the grid-shaped reinforcing ribs 40.

Door 5 may be provided with an annular sealing member to form an airtight joint between housing 4 and door 5 when door 5 is in the closed position, preventing gas from entering low-pressure storage chamber 14 from the joint between housing 4 and door 5. The sealing element may also be arranged at the front end of the housing 4, for example connected to the front end wall 42 e.

When the low-pressure storage chamber 14 is closed by the door 5 and the air extractor is started, the air in the low-pressure storage chamber 14 is extracted, and the low-pressure storage chamber 14 is in a low-pressure state. According to a preferred embodiment of the present invention, at the end of the evacuation process, the pressure within the low pressure storage chamber 14 is between one standard atmosphere and a vacuum absolute. Since the air pressure in the low pressure storage chamber 14 is lower than the standard atmospheric pressure, those skilled in the art are also commonly referred to as "vacuum chamber".

The door body 5 is a drawer type door, and the door body 5 may be pushed toward the casing 4 to close the access opening 14a of the low pressure storage chamber 14 or pulled out to open the low pressure storage chamber 14. The rear side of the door body 5 is connected to a tray-like storage container 52 for storing articles. The user obtains items located in the low pressure storage unit 15 or stores items in the low pressure storage unit 15 by pushing or pulling the storage container 52 into or out of the low pressure storage chamber 14. The door body 5 and the storage container 52 together constitute a drawer unit that can be pushed into and pulled out of the housing 4.

A retractable guide unit may be provided between the storage container 52 and the housing 4, so that the door 5 and the storage container 52 can be smoothly pulled out of or pushed into the housing 4. The roller may be provided to support the storage container 52 so that the door 5 and the storage container 52 can be smoothly pulled out of or pushed into the housing 4.

The low pressure storage unit 15 includes a pair of locking mechanisms for locking the door body 5 and the housing 4 in the closed position. Referring to fig. 2, as shown in fig. 5 to 19, each locking mechanism includes a first engaging portion 6 disposed on the housing 4 and a second engaging portion 7 disposed on the door body 5 for engaging with the first engaging portion 6 on the corresponding side to lock and unlock the door body 5 and the housing 4. Through the combination of second cooperation portion 7 and first cooperation portion 6, door body 5 is locked in the closed position, and the sealing element between casing 4 and the door body 5 receives the locking force extrusion that locking mechanism produced and fully warp, and then the gas tightness between door body 5 and the casing 4 improves.

Referring to fig. 2, 4, 7, 9 and 12, the first engaging portions 6 are provided on opposite sides of the housing 4; the first fitting portion 6 includes a lock wall 61 recessed toward the front end wall 42e of the housing 4; the locking wall 61 is perpendicular to the side wall of the housing 4. Wherein the locking wall 61 includes a first locking end near the front end wall 42e and a second locking end located at the rear side of the first locking end, wherein the second locking end is located at the upper rear side of the first locking end; the locking wall 61 is arc-shaped and extends from the first locking end to the second locking end; wherein the locking wall 61 is recessed towards the front side of the housing.

A guide block 62 is provided at the lower side of the first locking end of the locking wall 61, an inclined guide wall 62a is provided at the rear side of the guide block 62, the guide wall 62a extends from the lower end of the guide block 62 rearward and upward to the first locking end of the locking wall 61, wherein the guide wall 62a smoothly transitions with the locking wall 61.

As shown in fig. 2, 5-11, the door body 5 has a receiving cavity 51 recessed rearward from the front surface 5a thereof for receiving the rod 10 and at least a portion of the paddle 24. A connecting piece 22 is arranged in the accommodating cavity 51 at the front side of the door body 5, and the connecting piece 22 and the bottom of the accommodating cavity 51 close to the shell 4 jointly define a horizontal fixed channel 25; a cylindrical rod body 10 is rotatably installed in the fixed channel 25; a shifting block 24 which is at least partially positioned in the accommodating cavity 51 is fixed on the rod body 10; the shifting block 24 rotates around the central axis X of the rod 10, and drives the rod 10 to rotate around its central axis X. The strength of the door body 5 can be ensured by the arrangement of the accommodating cavity 51, and meanwhile, the occupied space of the door body 5 can be reduced, so that the internal space of the refrigerator can be fully utilized.

The front side of the door body 5 is connected with a decorative cover 13; the decorative cover 13 is provided with an avoidance hole 17 for avoiding the shifting block 24 so as to avoid the shifting block 24 from interfering with the decorative cover 13 when rotating; wherein, the shifting block 24 is positioned in the avoiding hole 17 and protrudes out of the front side of the decorative cover 13 so as to facilitate the shifting of a user.

In the present embodiment, the rod 10 and the dial 24 are fixed together in a non-movable manner.

Two ends of the rod body 10 are respectively fixed with a second matching part 7. In this embodiment, the second matching portion 7 is fixed on the rod 10 immovably relative to the rod 10 by a fixing device such as a screw after being sleeved on the corresponding end of the rod 10, so that when the rod 10 is fixed on the door body 5 and rotates around its central axis X, the second matching portion 7 also rotates around the central axis X of the rod 10.

In the present embodiment, the second fitting portion 7 includes the lock plate 71, and the lock plate 71 is rotatable about the central axis X of the lever body 10; a column 72 is arranged at one side of the locking plate 71 facing the side wall of the shell 4; when the dial block 24 is toggled, the rod body 10 is driven by the dial block 24 to rotate and drive the locking plate 71 to rotate around the central axis X of the rod body 10, the upright post 72 slides to the rear side of the locking wall 61 to lock the door body 5 and the shell 4.

The shifting block 24 comprises a connecting block 24a with a sector-shaped section, and the area of the sector-shaped connecting block 24a close to the circle center is fixed with the rod body 10; a toggle handle 24b is arranged on the arc-shaped surface of the connecting block 24 a; the user rotates the dial 24 about the central axis X of the lever body 10 by dialing the knob 24 b. In this embodiment, the accommodating cavity 51 is vertically downward close to the bottom of the housing 4, and the angle of the fan-shaped cross section of the connecting block 24a is [100 °, 150 ° ], which can limit the rotation range of the dial block 24 to define the limit position of the rotation of the first matching part 7; the toggle handle 24b is arranged at one end of the arc-shaped surface of the connecting block 24a close to the lower cavity bottom of the containing cavity 51.

The lower end of the arc-shaped surface of the connecting block 24a is provided with a first positioning strip 24c, and the lower cavity wall of the accommodating cavity 51 is provided with a second positioning strip 51a at a position corresponding to the shifting block 24; when the user dials the dial block 24 to rotate downwards, the first positioning strip 24c gradually approaches the second positioning strip 51a, and when the first positioning strip 24c contacts the second positioning strip 51a, the user applies force to rotate the first positioning strip 24c from the front side of the second positioning strip 51a to the rear side of the second positioning strip 51 a; at this time, the dial 24 is released, and the first positioning bar 24c is restricted to the rear side of the second positioning bar 51a by the second positioning bar 51a, thereby completing the locking of the dial 24 at the second position. In this embodiment, the upper end of the arc-shaped surface of the connecting block 24a is provided with a third positioning strip 24d, the upper wall of the accommodating cavity 51 is provided with a fourth positioning strip (not shown in the figure) matched with the third positioning strip 24d at the upper end of the arc-shaped surface of the connecting block 24a, when a user pulls the shifting block 24 to rotate upwards and backwards, the third positioning strip 24d gradually approaches the fourth positioning strip, and when the third positioning strip 24d contacts the fourth positioning strip, the user applies force to rotate the third positioning strip 24d from the front side of the fourth positioning strip to the rear side of the fourth positioning strip; at this time, the dial 24 is released, and under the action of the fourth positioning bar, the third positioning bar 24d is limited to the rear side of the fourth positioning bar, so that the dial 24 is locked at the first position. The first positioning strip 24c and the second positioning strip 51a are arranged in a matched manner, so that when the door body 5 is locked with the shell 4, the shifting block 24 rotates to cause the untight sealing; the third positioning strip 24d and the fourth positioning strip are arranged in a matched manner, so that when the door body 5 is separated from the shell 4, the shifting block 24 is kept in an open state, and the second matching part 7 is prevented from colliding with the first matching part 6 when the door body 5 is closed.

The front side of the door body 5 may be provided with an air-charging passage 18 (shown in fig. 2) for communicating the inside and outside of the low-pressure storage unit 15, and a pressure-releasing member 19 for closing or opening the air-charging passage 18, which are provided on the door body 5. Wherein, the front side of the door body 5 is provided with a convex block 23, and the channel opening of the inflation channel 18 is arranged at the front side of the convex block 23. The pressure relief piece 19 is arranged on the rod body 10, when the shifting block 24 drives the rod body 10 to rotate, the rod body 10 drives the pressure relief piece 19 to coaxially rotate and move to be close to or far away from the inflation channel 18, and the pressure relief piece 19 closes or opens the inflation channel 18.

In this embodiment, the pressure relief member 19 is tapered to facilitate rotation of the thumb block 24 to rotate the pressure relief member 19 into and out of the inflation channel 18 to close or open the inflation channel 18.

As shown in fig. 7 to 9, the door 5 is in the closed position but is not yet locked, and the shift block 24 is in the first position. When the user rotates the dial 24 in the first direction (downward and backward), the dial 24 rotates inward around the central axis X of the rod 10, and the rod 10 rotates around its own central axis X under the driving of the dial 24, the rod 10 simultaneously rotates the locking plate 71 (second engaging portion 7) upward, the pillar 72 of the locking plate 71 (second engaging portion 7) gradually approaches the locking wall 61 (first engaging portion 6), and the pressure relief piece 19 gradually approaches the inflation channel 18.

As shown in fig. 10 to 12, the door 5 and the housing 4 are locked, and the dial 24 is at the second position. When the dial 24 is rotated to the second position, the pillar 72 on the lock plate 71 (second fitting portion 7) moves to the rear side of the lock wall 61; at this time, the pressure relief piece 19 is brought into close contact with the inflation passage 18 to close the inflation passage 18, and the low-pressure storage chamber 14 forms a closed space. The arrangement of the first matching part 6, the second matching part 7 and the pressure relief piece 19 can effectively lock the door body 5 and the shell 4, so that when the door body 5 and the shell 4 are locked, a closed low-pressure storage unit 15 is formed, the vacuumizing effect is ensured, and the food fresh-keeping effect is ensured.

As shown in fig. 13, when the door 5 and the housing 4 are in the unlocked and separated open state, the door 5 is pushed to close; as a door closing method, a user can directly push the decoration cover 13, the door body 5 moves towards the casing 4 under the driving of the decoration cover 13, and when the door body 5 and the casing 4 are at the closing position, the user rotates the shifting block 24, and the locking of the door body 5 and the casing 4 can be completed.

When the door body 5 is to be opened, a user can rotate the dial block 24 in a second direction (upward and forward) opposite to the first direction, the dial block 24 rotates upward and forward around the central axis X of the rod body 10, the rod body 10 also rotates around the central axis X of the rod body under the driving of the dial block 24, the rod body 10 drives the locking plate 71 (the second matching part 7) to rotate downward and forward, the upright post 72 on the locking plate 71 (the second matching part 7) gradually gets away from the locking wall 61 of the first matching part 6, and the pressure relief piece 19 gradually gets away from the inflation channel 18. In this process, the second engagement portion 7 is separated from the first engagement portion 6, the pressure relief piece 19 also releases the closure of the inflation passage 18, and external air enters the low-pressure storage chamber 14 through the inflation passage 18 to equalize the internal and external pressures. Then, the user can pull the door 5 forward, that is, open the storage container 52.

The combination of the second fitting portion 7 and the first fitting portion 6 at the locking position provides a locking force between the door body 5 and the case 4 to sufficiently deform the sealing member, thereby improving the airtightness between the door body 5 and the case 4.

When the dial 24 is in the position shown in fig. 10 and 12, the inflation channel 18 is tightly closed by the pressure relief 19; when the dial 24 is in the position shown in fig. 7 and 9, the inflation passage 18 has been opened, and external air can enter the low pressure reservoir chamber 14 through the inflation passage 18 to release the low pressure state of the low pressure reservoir chamber 14. It should be understood that in other embodiments, the inflation channel 18 and the pressure relief 19 may be provided separately from the paddle 24. For example, a button is provided on the door 5, and by pressing the button, the inflation duct 18 is opened, and then the user operates the dial 24 to open the door 5.

The decorative cover 13 is attached to the door 5 to shield the rod 10 and the pressure relief piece 19 from the front of the door 5.

The paddle 24 is rotatable about the central axis X of the lever body 10 between a first position and a second position. In the first position, the first positioning bar 24c on the shifting block 24 is positioned in front of the second positioning bar 51a on the accommodating cavity 51, and the maximum distance is formed between the lower end of the shifting block 24 and the bottom of the accommodating cavity 51 of the door body 5 close to the shell 4. In the second position, the first positioning bar 24c on the shifting block 24 is located at the rear side of the second positioning bar 51a on the accommodating cavity, and a minimum distance is formed between the lower end of the shifting block 24 and the bottom of the accommodating cavity 51 of the door body 5 close to the shell 4. Accordingly, the second engaging portion 7 associated with the dial 24 is restricted from rotational movement between a first limit position and a second limit position, wherein the second engaging portion 7 is in the first limit position (as shown in fig. 7) when the dial 24 is in the first position, and the second engaging portion 7 is in the second limit position (as shown in fig. 10) when the dial 24 is in the second position.

Fig. 14 to 19 are schematic structural views of an air duct mechanism of a low-pressure storage unit of a refrigerator; as shown in fig. 14 to 19, a main duct is formed in the cabinet 2 of the refrigerator 1; the first air duct 3 communicated with the main air duct is formed on the top wall of the housing 4 of the low-pressure storage unit 15, so that low-temperature air circulates along the top wall of the low-pressure storage unit 15, thereby cooling the low-pressure storage unit 15.

As shown in fig. 15-19, a groove 31 is formed on the top wall of the housing 4, a mounting table 32 surrounding the inner wall of the groove 31 is disposed inside the groove 31, an air duct cover 33 is mounted on the mounting table 32, and the air duct cover 33 cooperates with the groove 31 to define the first air duct 3.

A plurality of partition boards 34 are arranged in the groove 31, and the extension directions of the partition boards 34 and the groove 31 are kept consistent; wherein the spacer 34 is co-planar with the mounting platform 32; the mounting table 32 supports the duct cover 33 together with the partition 34. The partition 34 partitions the first air duct 3 into a plurality of air duct units arranged in parallel. The partition 34 guides low temperature air on the one hand; on the other hand, the strength of the top of the housing 4 is enhanced.

Reinforcing ribs are arranged on the outer side of the air duct cover 33 to reinforce the strength of the air duct cover 33.

In this embodiment, the groove 31 is U-shaped, the groove 31 includes a second groove section 31b close to the front end of the low-pressure storage unit 15 and parallel to the front end surface of the low-pressure storage unit 15, and both left and right ends of the second groove section 31b extend backwards to form a first groove section 31a and a third groove section 31c which are parallel; wherein the first groove section 31a, the second groove section 31b and the third groove section 31c are communicated in sequence; the shape of the air duct cover 33 is consistent with that of the groove 31, that is, the air duct cover 33 is U-shaped.

Namely, the first air duct 3 is U-shaped; wherein, two air duct openings of the first air duct 3 are both positioned at the rear end part of the shell 4; on one hand, the first air duct 3 is convenient to be communicated with the main air duct of the refrigerator 1; on the other hand, the area of the first air duct 3 covering the shell 4 is increased, so that the cooling effect is improved.

Two groove walls of the second groove section 31b are provided with clamping holes 31d, and the air duct cover 33 is provided with a clamping plate 33a matched with the clamping holes 31 d;

screw holes (not shown) are formed at the rear end of the housing of the low-pressure storage unit 15 at positions close to the first groove section 31a and the third groove section 31 c; the edge of the air duct cover 33 is provided with a fixing plate 33b, the fixing plate 33b is provided with a fixing hole matched with the screw hole, and the air duct cover 33 is fixed with the top wall of the shell 4 through a screw.

In this embodiment, the first air duct 3 is flat to increase the contact area between the low-temperature air and the housing, thereby improving the cooling effect.

The projected area of the first air duct 3 on the wall of the low-pressure storage unit 15 is denoted as S₁The area of the wall of the low-pressure storage unit 15 where the first air duct 3 is located is denoted as S₂，S₁：S₂∈[0.2，1]. In this embodiment, the first air duct 3 is provided on the top wall of the low-pressure storage unit 15; the invention is not limited to the top wall, but can be disposed on the side wall or the bottom wall or the rear wall of the housing 4.

The distance between the foremost end of the first air duct 3 and the foremost end of the low-pressure storage unit 15 is denoted as L₁The length of the low-pressure storage unit 15 in the front-rear direction is denoted as L₂，L₁：L₂∈[0.2，1]The above arrangement can efficiently diffuse low-temperature air to form a low-temperature environment at the top of the low-pressure storage unit 15, thereby reducing the temperature inside the low-pressure storage unit 15.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.

Claims

1. The refrigerator is characterized in that: it includes:

2. The refrigerator according to claim 1, wherein: a groove is formed on the wall of the low-pressure storage unit, and a mounting table surrounding the inner wall of the groove is arranged in the groove; the mounting table is provided with an air duct cover, and the air duct cover is matched with the groove to limit the first air duct.

3. The refrigerator according to claim 2, wherein: a plurality of partition plates are arranged in the grooves, and the extension directions of the partition plates and the grooves are consistent.

4. The refrigerator according to claim 3, wherein: the partition plate and the mounting table share the end face, and the mounting table and the partition plate jointly support the air duct cover.

5. The refrigerator according to any one of claims 2 to 4, wherein: the groove comprises a second groove section which is close to the front end of the low-pressure storage unit and is parallel to the front end surface of the low-pressure storage unit, and two ends of the second groove section extend backwards to form a first groove section and a third groove section which are parallel; the first groove section, the second groove section and the third groove section are communicated in sequence; the shape of the air duct cover is consistent with that of the groove.

6. The refrigerator according to claim 5, wherein: and clamping holes are formed in the two groove walls of the second groove section, and clamping plates matched with the clamping holes are arranged on the air duct cover.

7. The refrigerator according to claim 6, wherein: screw holes are formed in the shell walls of the rear end part of the low-pressure storage unit, which are close to the first groove section and the third groove section; the fixing plate is arranged on the edge of the air duct cover, the fixing plate is provided with fixing holes matched with the screw holes, and the air duct cover is fixed with the shell wall of the low-voltage storage unit through screws.

8. The refrigerator according to any one of claims 1 to 4, wherein: the first air duct is flat.

9. The refrigerator according to any one of claims 1 to 4, wherein: the projection area of the first air duct on the wall of the low-pressure storage unit where the first air duct is located is recorded as S₁And the area of the shell wall of the first air duct on the low-pressure storage unit is marked as S₂，S₁：S₂∈[0.2，1]。

10. The refrigerator according to any one of claims 1 to 4, wherein: the distance between the foremost end of the first air duct and the foremost end of the low-pressure storage unit is recorded as L₁And the length of the low-pressure storage unit in the front-back direction is marked as L₂，L₁：L₂∈[0.2，1]。