CN211204586U

CN211204586U - Refrigerator with a door

Info

Publication number: CN211204586U
Application number: CN201922316542.0U
Authority: CN
Inventors: 王磊; 张秋菊; 许锦潮; 高伟康; 张树栋; 申乃雨
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-20
Publication date: 2020-08-07
Anticipated expiration: 2029-12-20
Also published as: CN112984904A; CN112984908A; CN211204582U; CN112984907A; CN211204584U; WO2021114960A1; CN211204579U; CN112984909A; CN211204583U; CN211204585U; CN211204580U; CN112984905A; CN211204581U; CN112984906A

Abstract

The utility model provides a refrigerator, which comprises a box body for limiting a heat-insulating storage room, a low-pressure storage unit accommodated in the storage room, a drain pipe arranged on the box body and a vacuum pump fixed in the storage room; one end of the vacuum pump is communicated with the low-pressure storage unit, and the other end of the vacuum pump is communicated with a drain pipe of the refrigerator; when the vacuum pump operates, pumping out the air of the low-pressure storage unit, conveying the air to a drain pipe, and finally discharging the air out of the refrigerator through the drain pipe; the utility model discloses a setting can avoid directly discharging the refrigerator inside and make other regional food in the freezer taint the flavor mutually by the gas that takes out in the low pressure storage unit, influences the fresh-keeping effect of food.

Description

Refrigerator with a door

Technical Field

The utility model belongs to the technical field of the refrigerator, especially, relate 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 the food, it has been developed to provide a vacuum chamber in the refrigerator, and the vacuum chamber is vacuumized by a vacuuming device. The main function of the vacuum is to remove oxygen from the vacuum chamber to prevent food from deteriorating. This is because food spoilage is mainly caused by the action of microorganisms, the majority of which require oxygen for their survival. Because oxygen does not exist in the vacuum chamber, the microorganisms lose the living environment, and the food fresh-keeping effect is achieved. The preservation time of the food can be prolonged to 20-30 days by the vacuum technology, and the preservation time of the food can be greatly prolonged compared with that of the traditional refrigerator cold storage chamber. However, the gas pumped out by vacuum pumping is directly discharged into the refrigerator at present, which causes the airflow in the refrigerator to flow, and easily causes the food in other areas in the same space with the vacuum chamber in the refrigerator to be tainted with each other.

In view of this, the present invention is proposed.

Disclosure of Invention

The utility model provides a to foretell technical problem, provide a refrigerator.

In order to achieve the above object, the utility model discloses a technical scheme be:

a refrigerator, comprising:

a cabinet defining an insulated storage compartment;

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;

the drain pipe is arranged on the box body;

a vacuum pump fixed in the storage room; the air exhaust pipe is communicated with the low-pressure storage unit and the exhaust pipe is communicated with the drain pipe;

when the vacuum pump works, air in the low-pressure storage unit is conveyed to the drain pipe through the air suction pipe, the vacuum pump and the drain pipe in sequence, and finally is discharged out of the box body through the drain pipe.

Preferably, an air suction opening connected with the air suction pipe is arranged at the position, close to the rear end, of the top of the low-pressure storage unit.

Preferably, the drain pipe is provided with an exhaust port communicated with the exhaust pipe; the exhaust pipe is communicated with the exhaust port through a second pipeline.

Preferably, the first pipeline is fixed with an air suction port on the low-pressure storage unit, then bent and turned for multiple times and then communicated with the air suction pipe.

Preferably, the vacuum pump is provided on a rear wall of the storage room near a bottom of the low pressure storage unit.

Preferably, the first pipeline is fixed with the air suction port on the low-pressure storage unit and then extends along the edge of the top of the rear end of the low-pressure storage unit, and then bends at a first steering position and turns to extend to a second steering position; turning back downwards at the second turning position to a third turning position again; turning again at a third turning position to be communicated with the air exhaust pipe; and on the projection of the plane where the bottom wall of the low-pressure storage unit is located, the projection of the second turning direction and the projection of the third turning direction are both located on the extension line of the projection of the exhaust pipe.

Preferably, on a projection of a plane where the bottom wall of the low-pressure storage unit is located, a projection of the second turning direction coincides with a projection of the third turning direction.

Preferably, on a projection of a plane where the bottom wall of the low-pressure storage unit is located, a connection line between a projection of the first direction of rotation and a projection of the second direction of rotation is perpendicular to a projection of the rear wall of the low-pressure storage unit.

Preferably, on a projection of a plane where the bottom wall of the low-pressure storage unit is located, a projection of the first turning direction is located on a projection of the low-pressure storage unit, and a projection of the second turning direction is located between a projection of the rear wall of the storage room and a projection of the rear wall of the low-pressure storage unit.

Preferably, the exhaust pipe and the exhaust pipe of the vacuum pump are arranged in parallel up and down and are positioned at the same end of the vacuum pump.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

Drawings

Fig. 1 is a schematic view of the overall structure of the refrigerator of the present invention;

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

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

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

fig. 5 is an exploded schematic view of the door body of the refrigerator of the present invention;

fig. 6 is a schematic structural view of the low-pressure storage unit when the door and the housing of the refrigerator of the present invention are in the closed position but not locked;

fig. 7 is a partial cross-sectional view of the schematic view of the low-pressure storage unit when the door and the housing of the refrigerator of the present invention are in the closed position but not locked;

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

fig. 9 is a schematic structural view of the low-pressure storage unit when the door body of the refrigerator of the present invention is locked with the casing;

fig. 10 is a partial cross-sectional view of the schematic view of the low-pressure storage unit when the door of the refrigerator of the present invention is locked with the housing;

fig. 11 is a schematic structural view of the low-pressure storage unit when the door of the refrigerator of the present invention is unlocked from the casing and is in a separated state;

FIG. 12 is a schematic view of the relative positions of the air extractor, the low pressure storage unit and the drain pipe of the refrigerator of the present invention;

FIG. 13 is a schematic view of the refrigerator with the air extractor, the low pressure storage unit and the drain pipe at another angle;

FIG. 14 is a schematic view of the relative position structure of the drain pipe and the inner container of the refrigerator of the present invention;

FIG. 15 is a schematic view of the whole structure of the air extractor of the refrigerator of the present invention;

fig. 16 is a schematic structural view of an elastic body of the refrigerator of the present invention;

FIG. 17 is an exploded view of the air extractor of the refrigerator of the present invention;

FIG. 18 is a sectional view of the air extractor of the refrigerator of the present invention;

fig. 19 is a perspective view of the housing of the refrigerator of the present invention;

FIG. 20 is an enlarged view of area A of FIG. 19;

FIG. 21 is a schematic view of the relative position structure of the inner container and the shell of the refrigerator of the present invention;

FIG. 22 is an enlarged view of the area B in FIG. 21;

fig. 23 is a sectional view of the refrigerating chamber of the refrigerator of the present invention;

FIG. 24 is an enlarged view of region C of FIG. 23;

fig. 25 is a perspective view of the refrigerating chamber of the refrigerator of the present invention;

FIG. 26 is an enlarged view of region D of FIG. 25;

fig. 27 is an exploded perspective view of a pressure detecting unit of a low pressure storage unit of the refrigerator of the present invention;

FIG. 28 is an enlarged view of region E of FIG. 27;

fig. 29 is a partial sectional view illustrating a low pressure storage unit of a 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 pit 30; a refrigerating compartment 12; a low pressure storage chamber 14; the access port 14 a; a sealing element 16; a rail unit 17; an inflation channel 18; a pressure relief member 19; a rod body 20; a rotating plate 59; a freshness retaining container 44; relief holes 39; a low-pressure storage unit 15; 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 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 lower end face 5 b; a side end face 5 c; a housing cavity 52; a boss 53; a storage container 54; a first fitting portion 6; a first shroud 60 a; a second shroud 60 b; a latch accommodating portion 61; a lock portion 62; the locking wall 62 a; the guide wall 62 b; a travel switch 63; a stroke pusher 63 a; a through port 64; an opening 65; a second fitting portion 7; the first strip 71 a; a second strip 71 b; a third strip 71 c; a fourth strip 71 d; a bump 72; a handle 81; the accommodating space 82; a connecting member 83; a decorative cover 8; a drain pipe 21; a vacuum pump 22; a first pipe 23; a second conduit 24; the suction pipe 22 a; an exhaust pipe 22 b; a positioning block 22 c; a pump housing 27; the connecting plate 27 a; a first housing 27 b; a second housing 27 c; an elastic body 28; a main body portion 74; mounting cavity 74 a; a perforation 75; an end cap 76; the positioning holes 76 a; a projection 77; notches 77 a; a first fixed portion 3; a first side plate 31; a second side plate 32; a third side plate 33; a first base plate 34; the fixing hole 32 a; a limiting channel 35; a limit passage port 35 a; a guide channel 36; the guide passage opening 36 a; a second fixed portion 11; a second bottom plate 11 a; a fixing hook 11 b; a fixed column 11 c; a first air duct 10; a first outlet 10 a; a second outlet 10 b; a pressure detection unit 9; a column 91; a first through hole 91 a; a second through hole 91 b; a rubber seal 92; the abutment 92 a; a pressure switch 93; a spring 94; a slider 95; the floating plate 95 a; the floating columns 95 b; a recessed portion 95 c; a mounting block 45; a mounting table 46; a fixed table 47; a pressure cap 55; a groove 56; a fixed plate 57; a housing chamber 58; a third through hole 58 a; and a resilient catch 58 b.

Detailed Description

The present invention is further described below in conjunction with specific embodiments so that those skilled in the art may better understand the present invention and can implement the present invention, but the scope of the present invention is not limited to the scope described in the detailed description. 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, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is correspondingly 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 implicit ly 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Fig. 1 to 11 are schematic structural views of a locking mechanism of a low pressure storage unit of a refrigerator; referring to fig. 1 to 11, a refrigerator 1 includes a heat-insulating box 2, and 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 utility model discloses well freezer 12 sets up cold-stored door of running from opposite directions, and the freezer sets up the freezing door of running from opposite directions.

It should be understood that the present invention should not be limited to the specific distribution of the storage compartments of the refrigerator 1, but that the present invention can also be applied to other forms of refrigerators 1, such as a refrigerator 1 with a drawer-type 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 22 and a pipe connected between the vacuum pump 22 and the low pressure storage unit 15.

The refrigerator 1 is provided with a control unit for controlling the air extractor to vacuumize the low-pressure storage unit 15, so as to realize automatic control of vacuuming 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 44 with high humidity and suitable for keeping food 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 in parallel with the fresh food container 44 at the bottom of the refrigerating chamber 12.

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 44 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 44 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. In addition, the access opening 14a of the housing 4 is formed in the front end wall 42e of the lower housing 42, so that the access opening 14a of the housing 4 is integrated, and the airtightness of the housing 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.

The door 5 may be provided with an annular sealing member 16 to form an airtight joint between the housing 4 and the door 5 when the door 5 is in the closed position, preventing gas from entering the low-pressure storage chamber 14 from the joint between the housing 4 and the door 5. The sealing element 16 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. In accordance with a preferred embodiment of the present invention, at the end of the evacuation sequence, the pressure within the low pressure storage chamber 14 is between a standard atmospheric pressure 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 54 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 54 into or out of the low pressure storage chamber 14. The door 5 and the storage container 54 together constitute a drawer unit that can be pushed into and pulled out of the housing 4.

A retractable rail unit 17 may be provided between the storage container 54 and the housing 4, so that the door 5 and the storage container 54 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. As shown in fig. 2 to 11, each locking mechanism includes a first engaging portion 6 disposed on the housing 4 and second engaging portions 7 rotatably disposed at two ends of the door body 5 around the rotation axis X for engaging with the first engaging portions 6 on the corresponding sides to lock and unlock the door body 5. Through the combination of the second matching part 7 and the first matching part 6, the door body 5 is locked at the closing position, and the sealing element 16 between the shell 4 and the door body 5 is pressed by the locking force generated by the locking mechanism to be fully deformed, so that the air tightness between the door body 5 and the shell 4 is improved.

The first lower side wall 42c and the second lower side wall 42d of the housing 4 near the pick-and-place port 14a are both provided with a latch accommodating part 61 and a first matching part 6 positioned in the latch accommodating part 61; the housing 4 is provided with a first enclosing plate 60a parallel to the bottom wall 42a of the housing 4, and a second enclosing plate 60b connected to the rear end of the first enclosing plate 60a far from the access opening 14a and extending forward and downward to the foremost end of the housing 4. The first enclosure 60a is connected to the second enclosure 60b to form the latch receiving portion 61. The latch accommodating portion 61 is formed with a passage opening 64 at the foremost end of the housing 4, and the passage opening 64 is used for inserting or extracting the second fitting portion 7. In this embodiment, the end surfaces of the first enclosing plate 60a and the second enclosing plate 60b far away from the wall of the casing 4 and the end surfaces of the reinforcing ribs 40 far away from the wall of the casing 4 are coplanar. The end face of the first matching part 6, which is far away from the wall of the shell 4, and the end face of the reinforcing rib 40, which is far away from the wall of the shell 4, share the end face, and the occupied space of the low-pressure storage unit 15 is ensured not to be increased by the arrangement, so that the space is fully utilized.

The first fitting portion 6 includes a locking portion 62; in the latch accommodating portion 61, the locking portion 62 is fixed to the first enclosing plate 60 a; the locking portion 62 includes a locking wall 62a perpendicular to the first shroud 60a and an obliquely disposed guide wall 62 b; the guide wall 62b has one end connected to an end of the locking wall 62a remote from the first enclosing plate 60a and the other end connected to an end of the first enclosing plate 60a near the access opening 14 a.

The upper portion of the latch accommodating portion 61 on at least one side of the casing 4 is provided with a position detecting device which is electrically connected with the air extracting device and is used for detecting the locking and unlocking states of the door body 5 in cooperation with the second matching portion 7. The position detection device comprises a travel switch 63 fixedly arranged on the shell and a travel push rod 63a connected to the shell in a sliding way; the stroke switch 63 has a trigger portion; one end of the stroke push rod 63a is matched with the trigger part, and the other end is matched with the second matching part 7; when the second engagement portion 7 slides along the lock wall 62a, the stroke pushing rod 63a is pushed to move, and the stroke switch 63 is triggered. The first enclosing plate 60a is provided with an opening 65 which is separated from the guide wall 62b on both sides of the locking wall 62 a; the opening 65 is disposed adjacent to the locking wall 62 a. The stroke push rod 63a of the stroke switch 63 extends into the latch accommodating portion 61 through the opening 65 and is located adjacent to the locking wall 62 a.

As shown in fig. 2, 5 to 11, the door body 5 is connected to a decorative cover 8. The door body 5 has connecting members 83 at opposite ends thereof, and the second fitting portion 7 is rotatably provided on the connecting members 83. The second engaging portion 7 rotates around its rotation axis X and drives the handle 81 fixed thereto to rotate.

A second fitting portion 7 is fixed to each end of the handle 81. In the present embodiment, after the second fitting portion 7 is fixed to the corresponding end of the handle 81, it is fixed to the handle 81 by fixing means such as screws so as to be immovable with respect to the handle 81, so that when the handle 81 is rotationally moved, the second fitting portion 7 is also rotated about the rotation axis X.

In this embodiment, the second engaging portion 7 includes a locking plate, the locking plate is rotatable around a rotation axis X, an axis of the rotation axis X is horizontally disposed and has a set distance from the handle 81, a protrusion 72 is disposed on a side of the locking plate facing the side wall of the housing 4, and when the locking plate is rotated around the rotation axis X under the driving of the handle 81, the protrusion 72 slides along the guide wall 62b to the rear side of the locking wall 62a to lock the door 5 and the housing 4.

The locking plate is in a flat plate shape and comprises a first lath 71a, a second lath 71b and a third lath 71c which are connected end to end in sequence, wherein a connection part of the first lath 71a and the second lath 71b extends to form a fourth lath 71d which is positioned on the same side of the third lath 71c as the first lath 71a and forms an acute angle with the first lath 71 a.

The middle position of the second lath 71b is rotatably fixed on the connecting piece 83 at the end part of the door body 5; the bump 72 is provided at the connection between the second strip 71b and the third strip 71 c. The end of the fourth strip 71d remote from the third strip 71c is secured to a respective end of the handle 81. When the handle 81 is rotated, the handle 81 drives the second fitting portion 7 to rotate integrally about the rotation axis X located at the middle position of the second strip 71b via the fourth strip 71 d.

The front side of the door body 5 may be provided with a pressure relief device for closing or opening an inflation channel 18 (shown in fig. 5) provided on the door body 5 for communicating the inside and outside of the low-pressure storage unit 15, and for closing or opening the inflation channel 18. The pressure relief device comprises a rod body 20 linked with the second matching part 7, a rotating plate 59 fixedly connected to the rod body 20 and a pressure relief piece 19 fixed on the rotating plate 59 and used for closing or opening the inflation channel 18. Wherein, two ends of the rod body 20 are respectively fixed on the locking plates at the corresponding sides, and the rod body 20 and the lug 72 are respectively positioned at two sides of the rotating shaft X; the rotation axis of the rotation plate 59 coincides with the rotation axis X of the second engagement portion; when the second engaging portion 7 is driven by the handle 81 to rotate around the rotation axis X, the rod 20 and the rotating plate 59 are driven to rotate coaxially, and the pressure relief member 19 closes the inflation channel 18. The two ends of the rod 20 penetrate through the decoration cover 8, and the first strip 71a of the second matching part 7 and the corresponding end of the rod 20 are fixed in a non-movable manner. The two sides of the decorative cover 8 are provided with avoidance holes 39 consistent with the rotating motion track of the rod body 20, and a gap for the rotating motion of the rod body 20 exists between the door body 5 and the decorative cover 8.

Referring to fig. 5 in conjunction with fig. 2, the door 5 has a receiving cavity 52 recessed rearward from the front surface 5a thereof for receiving at least a portion of the pressure relief device. The inflation passage 18 is provided on the wall of the housing chamber 52 remote from the decorative cover 8 and communicates the low-pressure storage chamber 14 with the housing chamber 52; a convex column 53 which takes the rotating shaft X as a central axis is arranged in the containing cavity 52; one end of the rotating plate 59 is fixed with the rod body 20, and the other end can be fixed in the accommodating cavity 52 in a rotating way around the convex column 53; the pressure relief member 19 is provided inside the rotating plate 59; a torsion spring which is separated from the pressure relief piece 19 on two opposite sides of the rotating plate 59 is arranged between the rotating plate 59 and the cavity wall of the containing cavity 52 far away from the decorative cover 8. When the door body 5 is locked with the housing 4, the first matching part 6 is locked with the second matching part 7, and the torsion spring presses the rotating plate 59, so that the pressure relief piece 19 presses the inflation channel 18. When the door body 5 is in the closed position but not locked yet, after the applied external force is released, the rotating plate 59 is pressed inwards and downwards under the action of the torsion spring, and the rotating plate 59 drives the second matching part 7 and the handle 81 to rotate inwards and downwards; therefore, when the user closes the door body, the number of the users can be reduced, and the closing operation is simplified; in addition, the torsion spring can limit the limit position of the upward and forward rotation of the handle 81, which can prevent the user's hand from being pressed by the handle 81 and the door body 5 when the upper end of the handle 81 approaches the front surface 5a of the door body 5 as the handle 81 continues to rotate.

According to a preferred embodiment of the present invention, the end of the rotating plate 59 is provided with a fixing channel for installing the rod 20 and the cross section of the fixing channel is polygonal, the cross-sectional shape of the rod 20 is consistent with the cross-sectional shape of the fixing channel, and the polygonal cross-sectional shape makes the rod 20 and the rotating plate 59 unable to generate relative rotation motion.

As shown in fig. 6 to 8, the door 5 is in the closed position but is not yet locked, and the handle 81 is in the first position. When the user presses the handle 81 downwards and backwards, the handle 81 rotates inwards around the rotating shaft X of the second matching part 7, and simultaneously the handle 81 drives the second matching part 7 and the rod body 20 to rotate inwards, the convex block 72 of the second matching part 7 gradually approaches to one side of the locking part 62 far away from the pick-and-place opening 14a, and simultaneously gradually approaches to the stroke push rod 63a of the stroke switch 63; the rod 20 drives the rotating plate 59 to rotate inward, and the rotating plate 59 drives the pressure relief piece 19 to gradually approach the inflation channel 18.

As shown in fig. 9 to 10, the door 5 and the housing 4 are in a locked state, and the handle 81 is in the second position. When the handle 81 rotates to the second position, the second matching part 7 rotates to enter the lock catch accommodating part 61, the bump 72 on the second matching part 7 moves to the adjacent position at the rear side of the locking wall 62a and pushes the stroke push rod 63a to move upwards, the stroke switch 63 is triggered, the stroke switch 63 sends a door closing control signal to the control unit, and the control unit controls the air suction device to start air suction according to the control signal; 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 first matching part 6, the second matching part 7 and the travel switch 63 electrically connected with the air extracting device are arranged, so that the locking state of the door body 5 and the shell 4 can be monitored in time, when the door body 5 and the shell 4 are locked, a vacuumizing signal is sent to the air extracting device in time, the vacuum degree of the low-pressure storage unit 15 is ensured, and the fresh-keeping effect of food is ensured.

As shown in fig. 11, 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, the user can lift the handle 81 upward and push it toward the housing 4, and when the door 5 is in the closed position but not yet locked, the locking can be completed by pressing the handle 81 downward and rearward, and the pressure relief piece 19 is in close contact with the inflation channel 18 to block the inflation channel 18. As another door closing method, a user can directly push the decorative cover 8, the second matching part 7 moves to the latch accommodating part 61 in parallel under the driving of the decorative cover 8, the protrusion 72 on the second matching part 7 contacts with the guide wall 62b of the locking part 62, and under the action of horizontal pushing force and the guide wall 62b, the protrusion 72 moves down along the guide wall 62b and drives the second matching part 7 to rotate downward around the rotation axis X; the bump 72 moves downwards to gradually approach the joint of the guide wall 62b and the locking wall 62a, the door body 5 is continuously pushed to move towards the shell 4, the bump 72 moves to the adjacent position at the rear side of the locking wall 62a, and the door body 5 is locked with the shell 4; while the pressure relief member 19 is brought into close contact with the inflation passage 18 to close off the inflation passage 18. In the utility model, the door closing mode of directly pushing the decorative cover 8 at the front side of the door body 5 to push and close is realized, the handle 81 is not needed, the use is convenient and fast, and the energy input of a user for placing a force application point on the door handle 81 is reduced; meanwhile, under the action of the guide wall 62b, the locking process is smooth and stable, and collision is avoided.

The door body 5 and the housing 4 are locked, and when the door body 5 is to be opened, a user can hold the lower end of the handle 81 and lift the handle 81 upward and outward, the handle 81 rotates around the rotation axis X, and the second matching part 7 fixed on the connecting piece 83 rotates upward. In the process, the rod 20 rotates upward and rotates the rotating plate 59 upward around the rotating axis X, the pressure relief member 19 also releases the sealing of the inflation channel 18, and external air enters the low pressure storage chamber 14 through the inflation channel 18 to balance the internal and external pressures. Then, the user can hold the handle 81 and pull forward, i.e., open the door body 5.

Under the condition that the space occupied by the low-pressure storage unit 15 is not increased by the second matching part 7 and the first matching part 6, locking is completed, the structure is compact, and matching is stable.

The engagement 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 16, thereby improving the airtightness between the door body 5 and the case 4.

When the handle 81 is in the position shown in fig. 9 and 10, the inflation channel 18 is tightly closed by the pressure relief 19; when the handle 81 is in the position shown in fig. 6 to 8, 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 pressure relief 19 may be provided separately from the handle 81. For example, a button is provided on the door body 5, and by pressing the button, the inflation passage 18 is opened, and then the user operates the handle 81 to open the door body 5.

A region of the door body 5 near the lower end face 5b thereof is recessed rearward from the front face 5a thereof to form an accommodating space 82 accommodating the handle 81; in the present embodiment, the lower end of the accommodating space 82 extends to the lower end surface 5b of the door body 5, and the left and right ends extend to the side end surface 5c of the door body 5. When the door body 5 is in the locked state, the handle 81 is positioned in the accommodating space 82, and the front surface of the handle 81 is flush with the front surface 5a of the door body 5, which is positioned above the accommodating space 82, of the door body 5, so as to reduce the occupied volume of the low-pressure storage unit 15. It is particularly preferable that the handle 81 in the second position is completely accommodated in the accommodating space 82 of the door body 5 not to exceed the front surface of the door body 5. A state in which the door body 5 is in the closed position but not yet locked, and at this time, the handle 81 is in the first position, and the handle 81 is moved out of the accommodating space 82 and is located on the front side of the front surface 5a of the door body 5; the first position of the handle 81 occurs when the user opens the low pressure storage unit 15, at which time the door of the refrigerator 1 is opened, without affecting the setting of the internal space of the refrigerator 1 occupied by the low pressure storage unit 15.

When the door of the refrigerator 1 is in a closed state and the door body 5 of the low pressure storage unit 15 is in a closed position but the handle 81 is in a second position (retracted position), the inside of the door is kept at a certain distance from the handle 81 so as not to damage the low pressure storage unit 15 when the door is closed. Therefore, by disposing the handle 81 in the accommodating space 82, the distance between the low pressure storage unit 15 and the inside of the door of the refrigerator 1 can be reduced, and thus the space utilization of the refrigerator 1 can be increased.

The cosmetic cover 8 is attached to the door body 5 to shield the pressure relief device from the front of the door body 5. Thus, the rod 20 is located entirely within the door 5.

The handle 81 is rotatably attached to the door body 5 after being fixed to the door body 5. When the handle 81 is rotated, the second engagement portion 7 is rotated, and the stick body 20 and the rotation plate 59 are rotated around the rotation axis X.

The handle 81 is rotatable about a rotation axis X between a first position and a second position. In the first position, the angle formed between the handle 81 and the wall surface of the accommodating space 82 of the door body 5 close to the housing 4 is the largest, and the lower end thereof forms the largest distance from the wall surface of the accommodating space 82 of the door body 5 close to the housing 4, so the first position can also be referred to as the extended position. In the second position, the angle formed between the handle 81 and the wall surface of the accommodating space 82 of the door body 5 close to the housing 4 is smallest, and the distance between the lower end of the handle and the wall surface of the accommodating space 82 close to the housing 4 is smallest, so that the second position can also be referred to as a retracted position. Accordingly, the second engagement portion 7 associated with the handle 81 and the rod 20 associated with the second engagement portion 7 are also restricted from rotating between a first limit position and a second limit position, wherein the second engagement portion 7 and the rod 20 are both in the first limit position (as shown in fig. 6 and 8) when the handle 81 is in the first position, and the second engagement portion 7 and the rod 20 are both in the second limit position (as shown in fig. 9) when the handle 81 is in the second position.

Fig. 12 to 14 are schematic structural views of a venting arrangement of a low pressure storage unit of a refrigerator; as shown in fig. 12 to 14, the refrigerator 1 has a drain pipe 21 for draining condensed water inside the refrigerator 1. One end of the air extracting device is communicated with the low pressure storage unit 15, and the other end is communicated with the drain pipe 21 of the refrigerator 1. The air exhausting device is operated to exhaust the air in the low pressure storage unit 15 and transfer the air to the drain pipe 21, and finally, the air is discharged out of the refrigerator 1 through the drain pipe 21. So as to avoid the air pumped out from the low-pressure storage unit 15 directly discharging into the refrigerator 1 to make the foods in other areas in the refrigerating chamber 12 taint with each other and affect the fresh-keeping effect of the foods.

The air-extracting means includes a vacuum pump 22, a first pipe 23 connecting the vacuum pump 22 and the low-pressure storage unit 15, and a second pipe 24 connecting the vacuum pump 22 and the drain pipe 21. The vacuum pump 22 is provided on the inner container 2b of the refrigerating chamber 12 near the bottom of the low pressure storage unit 15.

An air suction port connected with a first pipeline 23 is arranged at the position, close to the rear end, of the top of the low-pressure storage unit 15, and an air exhaust port connected with a second pipeline 24 is arranged on the drain pipe 21;

the vacuum pump 22 has a pump body, an air suction pipe 22a communicating with the first pipe 23, and an exhaust pipe 22b communicating with the second pipe 24. The exhaust pipe 22a and the exhaust pipe 22b of the vacuum pump 22 are arranged in parallel and are positioned at the same end of the vacuum pump 22; the first pipeline 23 is fixed with the air suction port on the low-pressure storage unit 15, bent and turned to extend along the top edge of the rear end of the low-pressure storage unit 15, and then turned to the first turning direction A₁Bend 9The rear wall of the 0-degree steering inner container 2B and the top wall 41a of the low-pressure storage unit 15 are parallel to extend to a second steering position B₁(ii) a In the second direction of rotation B₁Turns 90 degrees again and extends downwards to a third turning position C₁(ii) a In the third direction of rotation C₁And then turns to and communicates with the exhaust tube 22a again; wherein, on the projection of the plane of the storage unit bottom wall 42a, the second direction-changing direction B₁And a third steering direction C₁The projections are all positioned on the extension line of the projection of the exhaust tube 22 a; in addition, a first steering bit A₁Falls on the projection of the low-pressure storage unit 15, and a second steering direction B₁Is located between the projection of the rear wall of the inner container 2b and the projection of the rear wall of the low pressure storage unit 15. Wherein the second direction of rotation B₁Projection of (2) and a third direction of rotation C₁The projections of (a) coincide. The second pipe 24 is connected to the exhaust pipe 22b of the vacuum pump 22 and passes through the inner container 2b to communicate with the exhaust port of the drain pipe 21. The above multiple turning arrangement of the first pipe 23 makes the path of the pipe neat and reduces the space occupied by the pipe in the direction perpendicular to the rear wall of the liner 2b to increase the available space of the low pressure storage unit 15.

It should be understood that the present invention should not be limited to the above-described steering mode of the first suction pipe 22a, but that the present invention can also be applied to other steering modes to reduce the occupied space of the pipeline.

FIGS. 15-18 are schematic structural views of a suction device of a refrigerator; as shown in fig. 15-18, the air extractor includes a pump casing 27 and an elastic body 28 sleeved between the pump casing and the pump casing 27. The pump shell 27 is provided with a connecting plate 27a fixed with the back wall of the inner container 2 b; in this embodiment, the connecting plate 27a is provided with screw holes, and the pump case 27 is fixedly connected with the rear wall of the inner container 2b by screws.

The elastic body 28 has a main body part 74 for mounting the vacuum pump 22, and the main body part 74 is provided with a mounting cavity 74a conforming to the shape of the vacuum pump 22; the radial dimension of the mounting cavity 74a of the main body portion 74 is smaller than the radial dimension of the corresponding position of the vacuum pump 22, so that the elastic body 28 is tightly attached to the vacuum pump 22 and the vibration on the vacuum pump 22 is absorbed.

A positioning block 22c is arranged at one end of the vacuum pump 22 opposite to the end provided with the exhaust pipe 22a and the exhaust pipe 22 b; one end of the mounting cavity 74a of the main body 74 is provided with a through hole 75 for the exhaust pipe 22a and the exhaust pipe 22b to penetrate through, the other end is provided with an end cover 76 matched with the end of the vacuum pump 22, and the end cover 76 is provided with a positioning hole 76a matched with the positioning block 22 c; to protect the ends of the vacuum pump 22.

The outer periphery of the body portion 74 is provided with a plurality of protrusions 77 arranged side by side along the central axis of the body portion 74 and surrounding the body portion 74. The outer diameter of the main body 74 of the elastic body 28 is smaller than the inner diameter of the pump casing 27, and the outer diameter of the elastic body 28 is larger than the inner diameter of the pump casing 27, so that when the elastic body 28 is installed inside the pump casing 27, the elastic body 28 is installed between the pump casing 27 and the vacuum pump 22 in a pressed manner, and air cavities are formed between the protrusions 77, so that the vibration and noise reduction effects of the elastic body 28 are improved.

Notches 77a are arranged on the protrusions 77, and the notches 77a on the protrusions 77 correspond in position; the notch 77a is a space reserved for the deformation of the elastic body 28, so that the deformation capacity of the elastic body 28 is ensured, and the vibration reduction and noise reduction effects are improved. In this embodiment, the notch 77a is semicircular. The plurality of notches 77a are uniformly distributed on the protrusion 77. It should be understood that the present invention should not be limited to the shape and number of the notches 77a described above, and the present invention can also be applied to notches 77a having other shapes, such as 4 arcuate notches 77a provided on one protrusion 77.

The pump housing 27 includes a first housing 27b and a second housing 27c, and the first housing 27b and the second housing 27c are engaged with each other to be mounted outside the elastic body 28. The pump shell 27 is arranged in a split mode, and is convenient to disassemble and assemble.

Fig. 19 to 22 are schematic structural views of a fixing mechanism of a low pressure storage unit of a refrigerator; as shown in fig. 19 to 22, the refrigerator 1 includes a plurality of fixing mechanisms for connecting the low pressure storage unit 15 and the inner container 2 b. Each fixing mechanism includes a first fixing portion 3 provided on the bottom wall 42a of the low pressure storage unit 15 and a second fixing portion 11 provided on the bottom wall of the inner container 2b of the refrigerating chamber 12, and the low pressure storage unit 15 is fixed to the refrigerating chamber 12 by the combination of the first fixing portion 3 and the second fixing portion 11.

The first fixing portion 3 has a first side plate 31, a second side plate 32 and a third side plate 33 connected in sequence, wherein the first side plate 31 and the third side plate 33 are both perpendicular to the second side plate 32 and located on the same side of the second side plate 32, so as to form a guide channel 36 between the first side plate 31 and the third side plate 33, and a guide channel opening 36a is formed at one end far from the second side plate 32. The second side plate 32 is provided with a fixing hole 32 a. The end of the second side plate 32 away from the bottom wall 42a of the housing 4 is provided with a first bottom plate 34, the first bottom plate 34 connects the second side plate 32 and the third side plate 33, and a limiting channel 35 is formed on the first bottom plate 34, the limiting channel 35 extends in the direction away from the second side plate 32, and a limiting channel opening 35a is formed at the end of the first bottom plate 34 away from the second side plate 32, that is, the direction of the guide channel opening 36a is the same as that of the limiting channel opening 35 a. Wherein, along the direction from the second side plate 32 to the limiting passage opening 35a, the limiting passage 35 can be arranged in a gradually expanding manner. The plurality of first fixing portions 3 maintain the guide passage ports 36a to be uniformly distributed on the bottom wall 42a of the low pressure storage unit 15. In this embodiment, the four first fixing portions 3 are disposed in two rows. The guide passage opening 36a of the guide passage 36 faces the rear side of the housing 4 or is located on the side away from the freshness retaining container 44, so that the gap between the installed low-pressure storage unit 15 and the inner container 2b is reduced as much as possible, the internal space of the refrigerator 1 is fully utilized, the installation space reserved for installing the low-pressure storage unit 15 is avoided, and the occupied space of the low-pressure storage unit 15 is reduced.

The second fixing portion 11 has a second bottom plate 11a fixed on the bottom wall of the inner container 2b, a fixing hook 11b matched with the fixing hole 32a, and a fixing post 11c connecting the second bottom plate 11a and the fixing hook 11 b. The fixing column 11c is arranged in the guide channel 36 and the limiting channel 35; the fixing hook 11b is located between the first bottom plate 34 and the bottom wall 42a of the housing 4, and is installed in the fixing hole 32a to be clamped with the second side plate 32, and at this time, the fixing column 11c abuts against the end part of the limiting channel 35 close to the second side plate 32; the above cooperation setting is spacing to the three dimensionalities of second fixed part 11, improves installation stability. The second fixing portions 11 are uniformly distributed on the bottom wall of the inner container 2b in the same direction. In this embodiment, the bottom wall of the inner container 2b is provided with a concave recess 30 for fixing the second bottom plate 11a, so as to fix the second fixing portion 11 and reduce the height of the space occupied by the second fixing portion 11.

During assembly, the position of the low-pressure storage unit 15 is adjusted, so that the fixing hook 11b of the second fixing part 11 corresponds to the guide channel port 36a of the first fixing part 3, and the fixing column 11c corresponds to the limiting channel port 35 a; then, the low-pressure storage unit 15 is pushed to make the first side plate 31 of the first fixing portion 3 approach the second fixing portion 11 until the fixing hook 11b is installed in the fixing hole 32a of the first fixing portion 3, and the assembly is completed. The assembly of the low-pressure storage unit 15 and the inner container 2b can be completed by directly pushing, and the method is simple, convenient, quick and effective.

Fig. 23 to 26 are schematic structural views of an air duct mechanism of a low pressure storage unit of a refrigerator; as shown in fig. 23 to 26, the refrigerator 1 has a first duct 10 communicating with the main duct and disposed adjacent to the low pressure storage unit 15; the first duct 10 extends forward along the top of the low pressure storage unit 15 to guide the low temperature air to the front end of the low pressure storage unit 15; meanwhile, when the low-temperature air circulates in the first air duct 10, the area around the first air duct 10 is cooled.

The first air duct 10 is flat, and the overlapping area of the first air duct 10 and the low-pressure storage unit 15 can be increased by the arrangement, so that the cooling effect is improved. Along the air outlet direction, the first air duct 10 may be arranged in a gradually expanding manner to increase the overlapping area of the first air duct 10 and the front end of the low-pressure storage unit 15, so as to reduce the temperature difference between the front and the rear of the low-pressure storage unit 15.

The front end of the first air duct 10 is provided with a first air outlet 10a located on the front end surface thereof and a second air outlet 10b located on the lower end surface 5b thereof. The first air outlet 10a guides the low temperature air to the front, so that the low temperature air is diffused to the front end of the low pressure storage unit 15, thereby reducing the temperature difference between the front and the rear of the low pressure storage unit 15. The first air outlet 10a may be tapered along the air outlet direction to increase the air speed at the first air outlet 10a and increase the air supply distance. In this embodiment, the first outlets 10a are arranged at intervals.

The second outlet 10b guides the low temperature air to the top of the low pressure storage unit 15, and spreads on the top of the low pressure storage unit 15 centering on the second outlet 10b to cover the low pressure storage unit 15. The second air outlet 10b can be arranged in a gradually expanding manner from the first air duct 10 to the top of the low-pressure storage unit 15; to moderate the wind speed, the low temperature air is diffused to the periphery along the gap between the first wind tunnel 10 and the low pressure storage unit 15 to cover the low pressure storage unit 15.

The distance between the foremost end of the first duct 10 and the foremost end of the low pressure storage unit 15 is recorded as L₁The length of the low pressure storage unit 15 in the front-rear direction is L₂，L₁：L₂∈[0.2，0.8]The above arrangement can efficiently diffuse low-temperature air to form a low-temperature environment around the low-pressure storage unit 15, thereby reducing the temperature inside the low-pressure storage unit 15.

Therefore, the first air duct 10 guides the low-temperature air to the periphery of the low-pressure storage unit 15 to surround the low-pressure storage unit 15, so that a low-temperature environment with a lower temperature relative to other positions of the refrigerating chamber 12 can be maintained, and the refrigerating and refreshing effects of the low-pressure storage unit 15 can be enhanced.

In this embodiment, a communication opening communicating with the main air duct is provided on the rear wall of the inner container 2b, and the first air duct 10 is fixed to the communication opening. It should be understood that the present invention should not be limited to the installation position of the first air duct 10 and the structural form of the first air duct 10, and the present invention can also be applied to the first air duct 10 adjacent to the low pressure storage unit 15 and guiding the low temperature air to the front end of the low pressure storage unit 15, for example, in the side of the low pressure storage unit 15.

Fig. 27 to 29 are schematic structural views of a pressure sensing unit of a low pressure storage unit of a refrigerator; as shown in fig. 27-29, the refrigerator 1 has a pressure detecting unit 9 disposed at the back of the low-pressure storage unit 15 for detecting the pressure in the low-pressure storage unit 15 and electrically connected to the air extractor, so as to monitor the pressure in the low-pressure storage unit 15, when the pressure in the low-pressure storage unit 15 is higher than a predetermined value and loses the vacuum refrigeration effect, the pressure detecting unit 9 sends a vacuum-extracting signal to the air extractor, and the air extractor operates to form a "vacuum chamber", so as to ensure that when the pressure in the low-pressure storage unit 15 rises to the predetermined value due to the air leakage after a long time due to unavoidable reasons, the air extractor can operate in time to ensure the vacuum degree of the low-pressure storage unit 15, thereby ensuring the food fresh-keeping effect.

The pressure detecting unit 9 has a pillar 91 protruding from the back of the low pressure storage unit 15, the pillar 91 having a first through hole 91a communicating with the low pressure storage chamber 14 of the low pressure storage unit 15; one end of the upright post 91 far away from the low-pressure storage unit 15 is provided with a rubber sealing piece 92 for sealing the end part of the upright post 91 and a pressure switch 93 abutted against the rubber sealing piece 92; a spring 94 is arranged between the rubber seal 92 and the bottom of the upright 91, and a floating block 95 is arranged between the spring 94 and the rubber seal 92. When the pressure in the low-pressure storage unit 15 increases to a certain degree, the pressure in the first through hole 91a of the pillar 91 increases, the floating block 95 is acted by a certain air pressure, the rubber sealing member 92 is pushed to move against the pulling force of the spring 94, and the rubber sealing member 92 is acted by the floating block 95 to apply pressure to the pressure switch 93 so as to trigger the pressure switch 93; the pressure switch 93 sends a control signal to the control unit, and the control unit controls the air extractor to vacuumize the low-pressure storage unit 15 according to the control signal. As a preferred embodiment of the present invention, the back region of the low pressure storage unit 15 surrounded by the first through hole 91a is provided with a mounting block 45 fixed to one end of the spring 94; a slider 95 is fixed to the other end of the spring 94; a second through hole 91b having a radial dimension larger than that of the first through hole 91a is formed at one end of the pillar 91 remote from the low pressure storage unit 15, so that a mounting table 46 for mounting a rubber seal 92 is formed at one end of the pillar 91 remote from the low pressure storage unit 15; the floating block 95 is T-shaped, and includes a floating plate 95a abutting against the rubber seal 92 and having a recess 95c in a central region thereof, and a floating column 95b connected to the spring 94, the floating plate 95a having a radial dimension larger than that of the floating column 95 b; the rubber seal 92 is in a truncated cone shell shape with a center part provided with a prop 92a matched with the upper concave part 95c of the floating plate 95 a; wherein the dimension of the frustoconical rubber seal 92 at the end remote from the mounting station 46 is smaller than the dimension thereof at the end proximate to the mounting station 46.

A fixed table 47 for installing the pressure cover 55 is arranged on the periphery of the upright column 91; one side of the pressure cover 55 is provided with an annular groove 56 matched with the upright post 91, and the periphery of the groove 56 is provided with a fixing plate 57 corresponding to the fixing table 47; the other side of the pressure cover 55 is provided with an accommodating cavity 58 for installing a pressure switch 93; the bottom of the accommodating chamber 58 is provided with a third through hole 58a, so that the rubber sealing member 92 abuts against the pressure switch 93. In this embodiment, an elastic hook 58b for fixing the pressure switch 93 is disposed at the opening of the accommodating cavity 58. The end of the column 91 is mounted in the annular groove 56 of the pressure cover 55, the inner groove wall of the annular groove 56 presses the rubber seal 92, and the fixing plate 57 is engaged with the fixing table 47 and fixedly connected thereto by screws.

The pressure detection unit 9 and the low-pressure storage unit 15 are integrated, the detection accuracy of the pressure detection unit 9 is improved, the pressure detection unit 9 monitors the pressure in the low-pressure storage unit 15 in real time, and when the pressure in the low-pressure storage unit 15 is higher than a preset value and the vacuum refrigeration effect is lost, a vacuumizing signal is sent to the air extractor in time to ensure the vacuum degree of the low-pressure storage unit 15, so that the food fresh-keeping effect is ensured.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. The refrigerator is characterized in that:

a cabinet defining an insulated storage compartment;

the drain pipe is arranged on the box body;

2. The refrigerator according to claim 1, wherein: and an air suction opening connected with the air suction pipe is formed in the position, close to the rear end, of the top of the low-pressure storage unit.

3. The refrigerator according to claim 2, wherein: the drain pipe is provided with an exhaust port communicated with the exhaust pipe; the exhaust pipe is communicated with the exhaust port through a second pipeline.

4. The refrigerator according to claim 3, wherein: the first pipeline is fixed with an air pumping port on the low-pressure storage unit, bent and turned for many times and then communicated with the air pumping pipe.

5. The refrigerator of claim 4, wherein: the vacuum pump is arranged on the rear wall of the storage room and is close to the bottom of the low-pressure storage unit.

6. The refrigerator according to claim 5, wherein: the first pipeline is fixed with the air suction port on the low-pressure storage unit and then extends along the edge of the top of the rear end of the low-pressure storage unit, and then bends at a first steering position to turn and extend to a second steering position; turning back downwards at the second turning position to a third turning position again; turning again at a third turning position to be communicated with the air exhaust pipe; and on the projection of the plane where the bottom wall of the low-pressure storage unit is located, the projection of the second turning direction and the projection of the third turning direction are both located on the extension line of the projection of the exhaust pipe.

7. The refrigerator according to claim 6, wherein: and on the projection of the plane of the bottom wall of the low-pressure storage unit, the projection of the second turning direction is coincident with the projection of the third turning direction.

8. The refrigerator according to claim 7, wherein: and on the projection of the plane of the bottom wall of the low-pressure storage unit, the projection connecting line of the first turning direction and the projection connecting line of the second turning direction is vertical to the projection of the rear wall of the low-pressure storage unit.

9. The refrigerator according to claim 8, wherein: and on the projection of the plane of the bottom wall of the low-pressure storage unit, the projection of the first turning direction is positioned on the projection of the low-pressure storage unit, and the projection of the second turning direction is positioned between the projection of the rear wall of the storage room and the projection of the rear wall of the low-pressure storage unit.

10. The refrigerator according to any one of claims 1 to 9, wherein: and the exhaust pipe of the vacuum pump are arranged in parallel and are positioned at the same end of the vacuum pump.