JP2023501673A - refrigerator - Google Patents

Abstract

A refrigerator (1) comprises an enclosure (2) defining a storage compartment and a low pressure storage unit (15) housed within the storage compartment, the low pressure storage unit (15) comprising a case (4), a door (5), The first fitting portion (6) provided at both ends of the case (4), the second fitting portion (7) rotatably provided on the door (5), and the second fitting portion (7) are interlocked. A handle (81) provided on the door and a pressure relief device interlocking with the handle (81), and when the door (5) and the case (4) are locked, by rotating the handle (81), The second fitting (7) and the first fitting (6) are locked and the pressure relief device closes the gas filling passage (18), at this time a sealed space is formed and a vacuum is applied to this space. Evacuation can be performed. When the door (5) and the case (4) are unlocked, the handle (81) is rotated to unlock the second fitting part (7) and the first fitting part (6). At the same time, the pressure release device opens the gas filling passage (18), the internal and external air pressures are gradually synchronized, and the door (5) can be easily opened.

Description

TECHNICAL FIELD The present disclosure relates to the technical field of refrigerators, and more particularly to refrigerators.

[Related Application]
The present disclosure is a Chinese patent application with application number 201922234935.7 filed on December 12, 2019, titled "Refrigerator", application number 201911330651.6 filed on December 20, 2019 , a Chinese patent application titled "refrigerator", filed on December 20, 2019 with application number 201922316459.3, a Chinese patent application titled "refrigerator", and December 20, 2019 It claims priority from a Chinese patent application entitled "Refrigerator" with application number 201922307498.7 filed on January 1, 2019, the entire content of which is incorporated into this application by reference.

Refrigerators occupy an important share of the market as essential electrical appliances for home life. With the increasing consumer demands for the quality of fresh food, the demands on refrigerators are also increasing, requiring higher placement and stronger functions of refrigerators. In particular, it is desirable for stored fresh food to have a longer shelf life, thereby ensuring the freshness of the ingredients and preventing loss of nutrients.

In order to preserve food better, at present, a refrigerator is provided with a vacuum chamber, and the vacuum chamber is evacuated by an evacuation apparatus. The primary effect of evacuation is to remove oxygen within the vacuum chamber so as to prevent food spoilage. However, in order to guarantee the vacuum state, it is necessary to strictly seal the vacuum chamber. It is difficult to open the door because the air pressure inside is lower than the outside air pressure.

An embodiment of the present disclosure provides a refrigerator, the refrigerator comprising:
a housing defining an insulated reservoir;
a low-pressure storage unit housed within the storage chamber, the interior of which can be evacuated to form a pressure below atmospheric pressure outside the housing;
The low pressure storage unit comprises:
a case defining a storage compartment having an access opening for loading and unloading items;
a door for opening and closing the loading/unloading port;
first fitting portions provided at opposite ends of the case;
second fitting portions provided at both ends of the door so as to be rotatable about a rotation axis X and fitting with the first fitting portions on the corresponding sides to achieve locking and unlocking of the door; ,
a handle positioned on the front side of the door, the end of which is fixedly connected to the second fitting portion on the corresponding side;
a gas filling passage provided in the door for communicating between the inside and outside of the low-pressure storage unit;
a pressure relief device that opens and closes the gas filling passage,
The pressure release device is a rod that interlocks with the second fitting part, and both ends of the rod are fixed to the second fitting part on the corresponding side, respectively, and are parallel to the rotation axis X. a rod;
a rotating plate that is fixedly connected to the rod and whose rotational axis coincides with the rotational axis of the second fitting portion;
a pressure release member fixed to the rotating plate for opening and closing the gas filling passage,
The second fitting portion rotates about the rotation axis X under the driving of the handle, thereby fitting with the first fitting portion to achieve locking and unlocking of the door and the case. At the same time, the second fitting part interlocks and coaxially rotates the rod and the rotary plate, thereby moving the pressure release member and realizing opening and closing of the gas filling passage.

1 is an overall structural schematic diagram of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is an exploded schematic view of a low pressure storage unit of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is a perspective view of a refrigerator case according to some embodiments of the present disclosure; FIG. FIG. 4 is another perspective view of a refrigerator case according to some embodiments of the present disclosure; 1 is an exploded schematic view of a refrigerator door according to some embodiments of the present disclosure; FIG. FIG. 4 is a schematic structural diagram of a low-pressure storage unit when the refrigerator door and case are in the closed position but not locked according to some embodiments of the present disclosure; 1 is a schematic partial cross-sectional view of a low pressure storage unit with a refrigerator door and case in a closed but unlocked position according to some embodiments of the present disclosure; FIG. FIG. 4 is a schematic partial cross-sectional view of another position of the low pressure storage unit when the refrigerator door and case are in a closed but unlocked position according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of a low-pressure storage unit when the refrigerator door and case are locked according to some embodiments of the present disclosure; FIG. 4 is a schematic partial cross-sectional view of a low pressure storage unit when the refrigerator door and case are locked according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of a low-pressure storage unit when the refrigerator door and case are unlocked and separated according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of the relative positions of a bleeder, a low-pressure storage unit and a drain pipe of a refrigerator according to some embodiments of the present disclosure; FIG. 4 is another angle relative position structure of a refrigerator bleed device and a low-pressure storage unit and a drain pipe according to some embodiments of the present disclosure; FIG. FIG. 4 is a schematic structural diagram of relative positions of a drain pipe and an inner liner of a refrigerator according to some embodiments of the present disclosure; 1 is an overall structural schematic diagram of a bleed device of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is a schematic structural diagram of an elastic body of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is an exploded schematic view of a refrigerator bleed apparatus in accordance with some embodiments of the present disclosure; FIG. 1 is a cross-sectional view of a refrigerator bleed apparatus in accordance with some embodiments of the present disclosure; FIG. 1 is a perspective view of a refrigerator case according to some embodiments of the present disclosure; FIG. FIG. 20 is an enlarged schematic structural view of the A region in FIG. 19; FIG. 4 is a schematic structural diagram of relative positions of an inner liner and a case of a refrigerator according to some embodiments of the present disclosure; FIG. 22 is an enlarged schematic structural diagram of a B region in FIG. 21; 1 is a cross-sectional view of a refrigerating compartment of a refrigerator of the present disclosure; FIG. FIG. 24 is an enlarged schematic structural diagram of a C region in FIG. 23; 1 is a perspective view of a cold compartment of a refrigerator according to some embodiments of the present disclosure; FIG. FIG. 26 is an enlarged schematic structural diagram of a D region in FIG. 25; 1 is an exploded perspective view of a pressure sensing unit of a low pressure storage unit of a refrigerator according to some embodiments of the present disclosure; FIG. FIG. 28 is an enlarged schematic structural diagram of an E region in FIG. 27; 1 is a partial cross-sectional view of a schematic diagram of a low pressure storage unit of a refrigerator according to some embodiments of the present disclosure; FIG.

The following further describes the present disclosure in combination with specific examples so that those skilled in the art can better understand and practice the present disclosure. It is not limited to the scope described in the detailed description. It should be noted that the examples and features in the examples in the present disclosure can be arbitrarily combined with each other as long as there is no contradiction.

It should be noted that all directional indications (up, down, left, right, front, back, etc.) in the embodiments of the present disclosure refer to the relative positions and motions of each component in a particular pose (as shown in the drawings). It is only for explaining the situation and the like, and when the specific posture changes, the direction indication also changes accordingly.

Also, references to "first," "second," etc. in this disclosure are used for descriptive purposes only and indicate or imply relative importance or imply the number of technical features indicated. should not be understood as shown in Thus, features defined by "first" and "second" may explicitly or implicitly include at least one such feature.

In addition, the technical solutions in each embodiment may be combined with each other, but should be based on what a person skilled in the art can realize. It is considered that the combination does not exist and does not fall within the scope of protection according to the present disclosure.

1 to 11 are schematic structural diagrams of a locking mechanism of a low-pressure storage unit of a refrigerator. As shown in FIGS. 1-11, the refrigerator 1 comprises an insulated housing 2 including a case 2a, an inner liner 2b, and an insulating layer (not shown) positioned therebetween. Enclosure 2 defines a plurality of insulated storage compartments for storing items such as food. In the present example, these storage compartments are respectively a refrigerating compartment 12 located at the top and a freezer compartment located at the bottom. The storage compartments can be closed by respective box doors. In the present disclosure, the refrigerator compartment 12 is provided with a refrigerating double door, and the freezer compartment is provided with a freezing double door.

It should be noted that the present disclosure should not be limited to the specific distribution of storage compartments of the refrigerator 1, but is also applicable to other configurations of refrigerators 1, such as refrigerators 1 with pull-out doors, for example. be.

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 throttling device (not shown) and an evaporator (not shown). Since such a refrigeration system is well known in the prior art, further description is omitted. Of course, refrigerator 1 can also use other forms of refrigeration systems (eg, absorption refrigeration systems, thermoelectric refrigeration systems, etc.).

The refrigerator 1 is provided with a low-pressure storage unit 15 that can be maintained in a low-pressure state, and an extraction device for extracting gas from the low-pressure storage unit 15 . The extraction system may include a vacuum pump 22 and a line 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 extraction device to evacuate the low-pressure storage unit 15 in order to realize automatic control of the evacuation of the low-pressure storage unit 15 .

In this embodiment, the low pressure storage unit 15 is provided within the refrigerator compartment 12 . It should be noted that in other embodiments, the low pressure storage unit 15 may be provided in other storage compartments, such as variable temperature rooms that can switch temperature ranges between refrigerated and frozen temperature ranges. .

The low-pressure storage unit 15 is located at the bottom of the refrigerating compartment 12 and supported by the bottom wall of the refrigerating compartment 12 . Adjacent to the low-pressure storage unit 15, a freshness-preserving container 44 suitable for storing foods such as vegetables with high humidity may be provided. are arranged side by side.

The low-pressure storage unit 15 may be configured separately from the housing 2 and assembled within the housing 2 . As shown in FIGS. 2 to 4, in this 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 freshness-keeping container 44 is 12, thereby effectively distributing the bottom space of the refrigerating compartment 12 such that both the fresh-keeping container 44 and the low-pressure storage unit 15 are insertable into and retractable from the refrigerating compartment 12. It is possible.

The low pressure storage unit 15 includes a case 4 that is fixed within the refrigerating compartment 12 and a door 5 that is connected to the case 4 and can be pushed into or pulled out of the refrigerating compartment 12 .

As shown in FIGS. 2-4, the case 4 has a box-like structure and defines a flattened low-pressure storage chamber 14 having a food access opening 14a. In this embodiment, the loading/unloading port 14a is positioned at the front end of the case 4 facing the user.

A grid-like reinforcing rib 40 is provided on the outside of the box wall of the case 4 to improve the strength of the box wall of the case 4 and prevent deformation due to the difference in pressure between the inside and outside after the case 4 is evacuated.

The case 4 includes an upper case 41 and a lower case 42 that are connected together to form the low pressure storage chamber 14, and the upper case 41 and the lower case 42 are integrated by ultrasonic welding. Specifically, the lower case 42 includes a bottom wall 42a, a first lower wall 42c, a lower rear wall 42b, a second lower wall 42d, which are sequentially connected and provided at the edge of the bottom wall 42a, and the lower case 42. It includes a front end wall 42e located at the front end and formed with the access opening 14a, where the bottom wall 42a of the lower case is thus the bottom wall of the low pressure storage unit 15. As shown in FIG. In this embodiment, the front end wall 42e has a flat abutment surface 43 which is substantially perpendicular to the horizontal plane and which is used for abutment with the door 5. As shown in FIG.

The upper case 41 has a top wall 41a, an upper rear wall 41b, a first upper wall 41c, and a second upper wall 41d which are connected in order and provided at the edge of the top wall 41a. The distance between the lower wall surfaces of the upper wall 41c and the second upper wall 41d and the ceiling wall 41a linearly decreases from the rear to the front, and decreases to 0 at the front edge of the ceiling wall 41a. That is, the projection of the first upper wall 41c and the second upper wall 41d on a plane perpendicular to the top surface is a triangle.

Here, the upper rear wall 41b and the lower rear wall 42b are put together, the first lower wall 42c and the first upper wall 41c are put together, the second lower wall 42d and the second upper wall 41d are put together, and the ceiling The front end portion of the wall 41a and the front end wall 42e of the lower case 42 are aligned, and the abutment positions are welded and fixed by ultrasonic welding, thereby fixedly connecting the upper case 41 and the lower case 42, and forming a low-pressure storage chamber. 14 are formed. The ultrasonic welding described above effectively improves the connection strength between the upper case 41 and the lower case 42 and ensures the airtightness of the entire case 4 . In addition, the opening 14a of the case 4 formed in the front end wall 42e of the lower case 42 imparts integrity to the opening 14a of the case 4 and effectively secures the airtightness of the case 4. As shown in FIG. Further, the distances between the lower wall surface of the first upper wall 41c and the second upper wall 41d and the top wall 41a linearly decrease from the rear to the front, and further decrease to 0 at the front edge of the top wall 41a. This installation reduces the number of abutting surfaces on which the upper case 41 and the lower case 42 are mated, and improves the airtightness of the case 4 as a whole, particularly the airtightness at the insertion/removal port 14a of the case 4 . On the other hand, by providing the case 4 as a separate structure having the upper case 41 and the lower case 42, processing of the grid-like reinforcing ribs 40 becomes convenient.

The door 5 may be provided with an annular sealing element 16, such that an airtight joint is formed between the case 4 and the door 5 when the door 5 is in the closed position. Gas can be prevented from entering the low-pressure storage chamber 14 from any point. The sealing element 16 may be provided at the front end of the case 4, eg connected to the front end wall 42e.

When the low pressure storage chamber 14 is closed by the door 5 and the bleed system is activated, the gas located within 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 disclosure, at the end of the evacuation process, the pressure within low pressure reservoir 14 is between normal atmospheric pressure and absolute vacuum. Because the air pressure within low-pressure storage chamber 14 is below normal atmospheric pressure, it is also commonly referred to by those skilled in the art as a "vacuum chamber."

The door 5 is a drawer type door, and can be pushed into the case 4 to close the loading/unloading port 14a of the low-pressure storage chamber 14 or pulled out from the case 4 to open the low-pressure storage chamber 14. - 特許庁A tray-shaped storage container 54 used for storage is connected to the rear side of the door 5 . The user moves the storage container 54 into and out of the low pressure storage chamber 14 so as to retrieve items in the low pressure storage unit 15 and store items in the low pressure storage unit 15 . The door 5 constitutes a drawer unit that can be put in and taken out from the case 4 together with the storage container 54 .

A stretchable guide rail unit 17 may be provided between the storage container 54 and the case 4 . As a result, the door 5 and the storage container 54 can be smoothly pulled out of the case 4 or pushed into the case 4 .

Low pressure storage unit 15 includes a pair of locking mechanisms for locking door 5 and case 4 in the closed position. As shown in FIGS. 2 to 11, each locking mechanism includes a first fitting portion 6 provided in the case 4 and a rotatable portion provided at both ends of the door 5 about the rotation axis X. and a second fitting portion 7 for fitting with the first fitting portion 6 of the door 5 to realize locking and unlocking of the door 5 . The door 5 is locked in the closed position by coupling the second fitting portion 7 and the first fitting portion 6, and the sealing element 16 between the case 4 and the door 5 is sufficiently pressed by the locking force of the locking mechanism. , and the airtightness between the door 5 and the case 4 is improved.

A first lower wall 42c and a second lower wall 42d near the loading/unloading port 14a of the case 4 are both provided with a lock accommodating portion 61 and a first fitting portion 6 located in the lock accommodating portion 61. , the case 4 includes a first enclosure plate 60a parallel to the bottom wall 42a of the case 4, and a first enclosure plate 60a connected to the rear end of the first enclosure 60a away from the opening 14a and facing forward and downward. A second surrounding plate 60b extending to the foremost end is provided. The first enclosing plate 60 a and the second enclosing plate 60 b are connected to form a lock receiving portion 61 . The lock accommodating portion 61 is formed with a passage opening 64 for inserting or withdrawing the second fitting portion 7 at the frontmost end of the case 4 . In this embodiment, the end faces of the first enclosing plate 60a and the second enclosing plate 60b away from the box wall of the case 4 and the end face of the reinforcing rib 40 away from the box wall of the case 4 are common end faces. The installation in which the end face of the first fitting portion 6 away from the box wall of the case 4 and the end face of the reinforcing rib 40 away from the box wall of the case 4 are used as a common end face reduces the space occupied by the low-pressure storage unit 15. Space can be fully utilized without increasing it.

The first fitting portion 6 includes a lock portion 62, which is fixed to the first enclosure plate 60a in the lock housing portion 61, and the lock portion 62 has a lock wall 62a perpendicular to the first enclosure plate 60a. and an inclined guide wall 62b, one end of which is connected to the end of the lock wall 62a away from the first enclosure 60a and the other end of which is close to the opening 14a of the first enclosure 60a. connected to the ends.

A position for detecting the locked and unlocked states of the door 5 by being electrically connected to the air bleeder and fitted with the second fitting portion 7 is located above the lock housing portion 61 on at least one side of the case 4 . A detection device is provided. The position detection device includes a limit switch 63 fixedly attached to the case and a limit push rod 63a slidably connected to the case, the limit switch 63 having a trigger portion, the limit push rod 63a One end is fitted with the trigger portion, the other end is fitted with the second fitting portion 7, and when the second fitting portion 7 slides along the lock wall 62a, the limit push rod 63a is pushed to move, This triggers the limit switch 63 . The first enclosure plate 60a is provided with a guide wall 62b and openings 65 located on both sides of the lock wall 62a, respectively, and the openings 65 are provided adjacent to the lock wall 62a. A limit push rod 63a of the limit switch 63 protrudes into the lock accommodating portion 61 through the opening 65 and is positioned near the lock wall 62a.

A decorative cover 8 is connected to the door 5, as shown in FIGS. A connection member 83 is provided at two opposite ends of the door 5 , and the second fitting portion 7 is rotatably provided on the connection member 83 . The second fitting portion 7 rotates about its rotation axis X, and rotates the handle 81 fixed thereto in conjunction with it.

One second fitting portion 7 is fixed to each end of the handle 81 . In this embodiment, the second fitting portion 7 is fixed to the corresponding end of the handle 81 and then fixed to the handle 81 by a fixing device such as a screw so as not to move relative to the handle 81 . When the handle 81 rotates, the second fitting portion 7 also rotates about the rotation axis X. As shown in FIG.

In some embodiments of the present disclosure, the second fitting portion 7 includes a lock plate that is rotatable about the rotation axis X, the axis of the rotation axis X is arranged in a horizontal direction, and the handle 81 extends from the handle 81 to a predetermined position. have a distance. A protruding block 72 is provided on the side of the lock plate facing the side wall of the case 4, and when the lock plate rotates about the rotation axis X under the driving of the handle 81, the protruding block 72 moves along the guide wall 62b. slid to the rear side of the lock wall 62a to lock the door 5 and case 4.

The lock plate has a flat plate shape and includes a first slat 71a, a second slat 71b and a third slat 71c that are connected in succession, and the connection point between the first slat 71a and the second slat 71b is extended. , forming a fourth slat 71d located on the same side of the first slat 71a and the third slat 71c and forming an acute angle with the first slat 71a.

The intermediate position of the second slat 71b is rotatably fixed to the connecting member 83 at the end of the door 5, and the protruding block 72 is provided at the connecting point between the second slat 71b and the third slat 71c. The end of fourth slat 71d remote from third slat 71c is fixed to the corresponding end of handle 81 . When the handle 81 rotates, the handle 81 interlocks the entire second fitting portion 7 so as to rotate around the rotation axis X located at the intermediate position of the second slat 71b through the fourth slat 71d. Let

On the front side of the door 5, there is a gas filling passage 18 (as shown in FIG. 5) for opening and closing the door 5 and communicating between the inside and the outside of the low pressure storage unit 15, and a gas filling passage. A pressure relief device for opening and closing 18 may be provided. The pressure release device includes a rod 20 interlocking with the second fitting portion 7, a rotary plate 59 fixedly connected to the rod 20, and a pressure release member 19 fixed to the rotary plate 59 for opening and closing the gas filling passage 18. include. Wherein, both ends of the rod 20 are respectively fixed to corresponding locking plates, the rod 20 and the projecting block 72 are positioned on both sides of the rotation axis X, and the rotation axis of the rotation plate 59 is aligned with the second fitting part. When the second fitting part 7 rotates about the rotation axis X under the driving of the handle 81, the rod 20 and the rotation plate 59 are coaxially rotated, and the pressure release member 19 is Close the gas filling passage 18 . Wherein, both ends of the rod 20 pass through the decorative cover 8, and the first slats 71a of the second fitting portion 7 are fixed to corresponding ends of the rod 20 so as not to move relative to each other. Avoidance holes 39 are provided on both sides of the decorative cover 8 so as to match the trajectory of the rotational movement of the rod 20, and a gap exists between the door 5 and the decorative cover 8 for the rotational movement of the rod 20.例文帳に追加

As shown in FIG. 5 in conjunction with FIG. 2, the door 5 has a receiving cavity 52 recessed rearwardly from its front surface 5a for receiving at least part of the pressure relief device. The gas filling passage 18 is provided in the cavity wall of the storage cavity 52 away from the decorative cover 8, communicates the low pressure storage chamber 14 and the storage cavity 52, and has a rotation axis X as a central axis in the storage cavity 52. A protruding column 53 is provided, and a rotating plate 59 has one end fixed to the rod 20 and the other end fixed in the housing cavity 52 so as to be rotatable about the protruding column 53 . Between the rotary plate 59 and the cavity wall remote from the decorative cover 8 of the receiving cavity 52, there is a pressure relief member 19 and a torsion spring located on each corresponding side of the rotary plate 59. . When the door 5 and the case 4 are locked, the first fitting portion 6 and the second fitting portion 7 are locked, the torsion spring clamps the rotating plate 59, and the pressure release member 19 is moved to the gas filling passage. 18 is clamped. When the door 5 is in the closed position but not yet locked, after releasing the applied external force, under the action of the torsion spring, the rotary plate 59 is pushed downward and inwardly, and the rotary plate 59 is pushed downward to the second position. 2. The fitting part 7 and the handle 81 are interlocked to rotate inward and downward, so that when the user closes the door, the user can be relieved and the closing operation can be simplified. The upper and forward rotation limit positions of the handle 81 can be limited so that the user's hand is positioned between the handle 81 and the door 5 as the handle 81 continues to rotate and the upper end of the handle 81 approaches the front surface 5a of the door 5. can be prevented from being caught by

According to some embodiments of the present disclosure, the end of the rotating plate 59 is provided with a polygonal cross-sectional fixed passageway for mounting the rod 20, the cross-sectional shape of the rod 20 being similar to the cross-sectional shape of the fixed passageway. The matching, polygonal cross-section installation makes it impossible to create relative rotational motion between the rod 20 and the rotating plate 59 .

As shown in FIGS. 6-8, the door 5 is in the closed but not yet unlocked position, with the handle 81 in the first position. When the user pushes the handle 81 downward and rearward, the handle 81 rotates inward about the rotation axis X of the second fitting 7 , and at the same time the handle 81 rotates between the second fitting 7 and the rod 20 . are interlocked to rotate inward, and the protruding block 72 of the second fitting portion 7 gradually approaches the side away from the insertion/removal port 14a of the lock portion 62, and at the same time, gradually reaches the limit push rod 63a of the limit switch 63. get closer to The rod 20 interlocks the rotating plate 59 to rotate inward, and the rotating plate 59 interlocks the pressure release member 19 to gradually approach the gas filling passage 18 .

As shown in FIGS. 9 and 10, the door 5 and case 4 are locked, and the handle 81 is at the second position. When the handle 81 is rotated to the second position, the second fitting portion 7 rotates into the lock receiving portion 61, and the protruding block 72 on the second fitting portion 7 is adjacent to the rear side of the lock wall 62a. further push the limit push rod 63a to move upward, triggering the limit switch 63, the limit switch 63 sends a control signal that the door is closed to the control unit, and the control unit responds to the control signal. to control the air bleed system and start air bleed. At this time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to block the gas filling passage 18, and the low pressure storage chamber 14 becomes a closed space. The installation of the limit switch 63 electrically connected to the first fitting portion 6, the second fitting portion 7, and the air bleed device makes it possible to immediately monitor and measure the locked state of the door 5 and the case 4. When the door 5 and the case 4 are locked, the evacuation signal is immediately sent to the bleeder to ensure the vacuum degree of the low-pressure storage unit 15 and to ensure the effect of preserving the freshness of the food.

As shown in FIG. 11, when the door 5 and the case 4 are in the unlocked and separated open state, the door 5 is pushed closed. As a form of closing the door, the user can lift the handle 81 upwards and push it toward the case 4, and pull the handle 81 downwards and backwards when the door 5 is in the closed but not yet unlocked position. When pressed, the locking is completed, and at the same time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to block the gas filling passage 18 . As another form of closing the door, the user can push the decorative cover 8 directly. In conjunction with the decorative cover 8, the second fitting portion 7 moves parallel to the lock housing portion 61, the protruding block 72 on the second fitting portion 7 contacts the guide wall 62b of the lock portion 62, Under the horizontal pushing force and the action of the guide wall 62b, the protruding block 72 moves downward along the guide wall 62b, causing the second fitting portion 7 to rotate downward about the rotation axis X. , the protruding block 72 moves downward to gradually approach the connection point between the guide wall 62b and the lock wall 62a, continues to push the door 5 toward the case 4, and the protruding block 72 moves behind the lock wall 62a. The door 5 and the case 4 are locked, and at the same time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to block the gas filling passage 18 . In the present disclosure, the closed door mode of directly pressing the decorative cover 8 on the front side of the door 5 to close it does not use the handle 81, which is convenient and comfortable, reduces the user's effort of placing the biasing point on the handle 81, and at the same time , under the action of the guide wall 62b, the locking process is smooth and stable, avoiding collision.

When the door 5 and the case 4 are locked and the door 5 is to be opened, the user holds the lower end of the handle 81 and lifts it upward and outward, and the handle 81 rotates about the rotation axis X, The second fitting portion 7 fixed to the connecting member 83 rotates upward. During this process, the rod 20 rotates upward, causing the rotary plate 59 to rotate upward around the rotation axis X, and the pressure release member 19 also releases the blockage of the gas filling passage 18, and the outside air is released from the gas filling. Passageway 18 leads into low pressure reservoir 14 to balance internal and external pressures. After that, the user can open the door 5 by holding the handle 81 and pulling it forward.

The second fitting portion 7 and the first fitting portion 6 described above can complete locking without increasing the space occupied by the low-pressure storage unit 15, and are compact in structure and stable in fitting.

The mating of the second mating portion 7 and the first mating portion 6 in the locked position provides a locking force between the door 5 and the case 4 and sufficiently deforms the sealing element 16, thereby allowing the door to To improve the airtightness between 5 and case 4.

When the handle 81 is in the position shown in FIGS. 9 and 10, the gas filling passage 18 is tightly closed by the pressure relief member 19, and when the handle 81 is in the position shown in FIGS. Already opened, outside air can enter the low-pressure storage chamber 14 through the gas filling passage 18 and thus relieve the low-pressure state of the low-pressure storage chamber 14 . In another embodiment, the gas filling passage 18 and the pressure release member 19 can be provided independently of the handle 81. For example, the door 5 is provided with a button. By pressing this button, the gas filling passage 18 is opened, and then the user opens the door 5 by operating the handle 81 again.

A region close to the lower end surface 5b of the door 5 is recessed rearward from the front surface 5a to form an accommodation space 82 for accommodating a handle 81. In this embodiment, the lower end of the accommodation space 82 is located at the lower end surface 5b of the door 5. , and both left and right ends extend to the side end faces 5c of the door 5. As shown in FIG. When the door 5 is in the locked state, the handle 81 is located within the storage space 82, the front surface of the handle 81 is flush with the front surface 5a of the door 5, where the door 5 is located above the storage space 82; This reduces the occupied volume of the low-pressure storage unit 15 . Particularly preferably, the handle 81 in the second position is completely received within the receiving space 82 of the door 5 and does not extend beyond the front surface of the door 5 . The handle 81 is in the first position when the door 5 is in the closed but not yet unlocked position, the handle 81 is out of the receiving space 82 and located in front of the front surface 5a of the door 5. 81 in the first position occurs when the user opens the low pressure storage unit 15, at which time the door of the refrigerator 1 is open, affecting the interior space of the refrigerator 1 occupied by the low pressure storage unit 15. Absent.

When the door of the refrigerator 1 is closed and the door 5 of the low pressure storage unit 15 is in the closed position and the handle 81 is in the second position (return position), the low pressure storage unit 15 will be damaged when closing the door. A constant distance is maintained between the inside of the door and the handle 81 so as to avoid Therefore, by providing the handle 81 within the housing space 82, the distance between the low-pressure storage unit 15 and the inner side of the door of the refrigerator 1 can be reduced, thereby improving the space utilization of the refrigerator 1. .

A decorative cover 8 is connected to the door 5 so as to shield the pressure relief device from the front of the door 5 . Thereby, the rod 20 as a whole is positioned within the door 5 .

The handle 81 is rotatably connected to the door 5 after being fixed to the door 5 . When the handle 81 is rotated, the second fitting portion 7 rotates, and both the rod 20 and the rotating plate 59 rotate about the rotation axis X. As shown in FIG.

The handle 81 is rotatable about the rotation axis X between a first position and a second position. At the first position, the included angle formed between the handle 81 and the wall surface of the housing space 82 of the door 5 near the case 4 is maximum, and the angle between the lower end of the handle 81 and the wall surface of the housing space 82 of the door 5 near the case 4 is Since the maximum distance is formed, the first position can also be referred to as the extended position. At the second position, the included angle between the handle 81 and the wall surface of the housing space 82 of the door 5 near the case 4 is the smallest, and the distance between the lower end of the handle 81 and the wall surface of the housing space 82 near the case 4 is the minimum. is formed, the second position can also be said to be a turn-back position. Correspondingly, the second fitting portion 7 interlocking with the handle 81 and the rod 20 interlocking with the second fitting portion 7 are also restricted to rotate between the first limit position and the second limit position. , where when the handle 81 is in the first position, the second fitting 7 and the rod 20 are both in the first limit position (as shown in FIGS. 6 and 8), and the handle 81 is in the second position. , both the second fitting portion 7 and the rod 20 are at the second limit position (state shown in FIG. 9).

12 to 14 are schematic structural diagrams of the exhaust installation of the low-pressure storage unit of the refrigerator. As shown in FIGS. 12 to 14, refrigerator 1 has drain pipe 21 for discharging condensed water inside refrigerator 1 . One end of the air extraction device communicates with the low pressure storage unit 15 and the other end communicates with the drain pipe 21 of the refrigerator 1 . The air bleeder operates to extract the air in the low pressure storage unit 15 and transport it to the drain 21 where it is finally discharged from the refrigerator 1 by the drain 21 . This prevents the gas extracted from the low-pressure storage unit 15 from entering directly into the refrigerator 1 to transfer smells of foods in other areas of the refrigerator compartment 12 to affect the freshness-preserving effect of the foods. do.

The extraction system includes a vacuum pump 22 , a first line 23 connecting the vacuum pump 22 and the low pressure storage unit 15 , and a second line 24 connecting the vacuum pump 22 and the drain line 21 . A vacuum pump 22 is provided in the inner liner 2 b of the cold room 12 and near the bottom of the low pressure storage unit 15 .

At a position near the rear end of the top of the low-pressure storage unit 15, an air extraction port connected to the first pipeline 23 is provided, and the drain pipe 21 is provided with an exhaust port connected to the second pipeline 24. .

The vacuum pump 22 has a pump, a bleed pipe 22 a communicating with the first conduit 23 , and an exhaust pipe 22 b communicating with the second conduit 24 . The bleed pipe 22a of the vacuum pump 22 is parallel to the exhaust pipe 22b and located at the same end of the vacuum pump 22, and the first pipe 23 is fixed to the bleed port of the low-pressure storage unit 15 and bent. turn and extend along the edge of the rear end top of the low-pressure storage unit 15, then turn 90 degrees toward the rear wall of the inner liner 2b at the first turning position A1, and the ceiling wall 41a of the low-pressure storage unit 15; and extends to a second turning position B1, turns 90 degrees again at the second turning position B1, extends downward to a third turning position C1, turns again at the third turning position C1, and extracts. Communicating with the trachea 22a, where the projection of the plane on which the storage unit bottom wall 42a is located, the projection of the second turning position B1 and the projection of the third turning position C1 on the plane are both the bleed pipe 22a. on the extension of the projection of Also, the projection of the first turning position A1 falls on the projection of the low-pressure storage unit 15, and the projection of the second turning position B1 is between the projection of the rear wall of the innerliner 2b and the projection of the rear wall of the low-pressure storage unit 15. Located in Wherein, the projection of the second turning position B1 overlaps the projection of the third turning position C1. The second conduit 24 communicates with the exhaust pipe 22 b of the vacuum pump 22 , passes through the inner liner 2 b and communicates with the exhaust port on the drain pipe 21 . The above-mentioned multiple turning installation of the first pipeline 23 aligns the path of the pipelines and reduces the space occupied in the direction perpendicular to the rear wall of the inner liner 2b of the pipelines, thereby allowing the low-pressure storage unit 15 increase the available space for

It should be noted that the present disclosure should not be limited to the turning configurations of the first bleed pipe 22a described above, and the present disclosure may also apply other turning configurations to reduce the occupied space of the duct. .

15 to 18 are schematic structural diagrams of an air bleeder for a refrigerator. As shown in FIGS. 15 to 18, the bleeding device includes a pump case 27 and an elastic body 28 fitted between the pump and the pump case 27. As shown in FIGS. The pump case 27 is provided with a connection plate 27a fixed to the rear wall of the inner liner 2b. and are fixedly connected by screws.

The elastic body 28 has a body portion 74 to which the vacuum pump 22 is attached. is smaller than the radial dimension of the vacuum pump 22 at the corresponding position, so that the elastic body 28 is in close contact with the vacuum pump 22 and the vibration of the vacuum pump 22 is immediately absorbed.

A positioning block 22c is provided at one end of the vacuum pump 22 opposite to the side on which the extraction pipe 22a and the exhaust pipe 22b are provided. The other end is provided with an end cover 76 that fits with the end of the vacuum pump 22, the end cover 76 is provided with a positioning hole 76a that fits with the positioning block 22c, This protects the ends of the vacuum pump 22 .

A plurality of protrusions 77 are arranged along the central axis of the body portion 74 and surround the body portion 74 on the outer periphery of the body portion 74 . The outer diameter dimension of the body portion 74 of the elastic body 28 is smaller than the inner diameter dimension of the pump case 27 , and the outer diameter dimension of the elastic body 28 is greater than the inner diameter dimension of the pump case 27 . , the elastic body 28 is pressed to be mounted between the pump case 27 and the vacuum pump 22, and air cavities are formed between the plurality of projections 77, thereby reducing the vibration noise of the elastic body 28. Improve the reduction effect.

The projection 77 is provided with a notch 77a, and the positions of the notch 77a in the plurality of projections 77 correspond to each other. Ensure deformation ability and improve vibration noise reduction effect. In this embodiment, the notch 77a is semi-circular. The plurality of notches 77a are evenly distributed on the projection 77. As shown in FIG. Note that the present disclosure is not limited to the shape and number of cutouts 77a described above, and cutouts 77a of other shapes may be applied. For example, the present disclosure may provide four arcuate cutouts 77a on one protrusion 77 .

The pump case 27 includes a first case 27b and a second case 27c. The first case 27b and the second case 27c are locked and attached to the outside of the elastic body . As described above, the pump case 27 is provided separately and is convenient for attachment and detachment.

19 to 22 are schematic configuration diagrams of a fixing mechanism for a low-pressure storage unit of a refrigerator. As shown in Figures 19-22, the refrigerator 1 includes a plurality of securing mechanisms for connecting the low pressure storage unit 15 and the inner liner 2b. Each fixing mechanism includes a first fixing part 3 provided on the bottom wall 42a of the low-pressure storage unit 15 and a second fixing part 11 provided on the bottom wall of the inner liner 2b of the refrigerating compartment 12. By coupling the fixing part 3 and the second fixing part 11 , the low pressure storage unit 15 is fixed to the refrigerator compartment 12 .

The first fixing part 3 has a first side plate 31, a second side plate 32 and a third side plate 33 which are connected in sequence, where the first side plate 31 and the third side plate 33 are both connected to the second side plate 32 and on the same side of the second side plate 32, thereby forming a guide passage 36 between the first side plate 31 and the third side plate 33, with a guide passage opening 36a at one end remote from the second side plate 32. to form The second side plate 32 is provided with a fixing hole 32a. A first bottom plate 34 is provided at one end of the second side plate 32 away from the bottom wall 42 a of the case 4 . The first bottom plate 34 connects the second side plate 32 and the third side plate 33 and A position regulating passage 35 is formed in , the position regulating passage 35 extends in a direction away from the second side plate 32 , and a position regulating passage opening is formed at the end of the first bottom plate 34 away from the second side plate 32 . 35a is formed, that is, the directions of the guide passage opening 36a and the position regulation passage opening 35a are the same. Here, the position regulation passage 35 can be set so as to gradually expand along the direction from the second side plate 32 toward the position regulation passage opening 35a. The plurality of first fixing parts 3 are distributed on the bottom wall 42a of the low-pressure storage unit 15 while maintaining the alignment of the guide passage opening 36a. In this embodiment, four first fixing portions 3 are provided in two sets of two rows. The guide passage port 36a of the guide passage 36 is positioned toward the rear side of the case 4 or on one side away from the freshness keeping container 44, thereby creating a gap between the low-pressure storage unit 15 and the inner liner 2b after installation. is reduced as much as possible, the internal space of the refrigerator 1 is fully utilized, the mounting space for mounting the low-pressure storage unit 15 is avoided in advance, and the space occupied by the low-pressure storage unit 15 is reduced.

The second fixing portion 11 includes a second bottom plate 11a fixed to the bottom wall of the inner liner 2b, a fixing hook 11b fitted into the fixing hole 32a, and a fixing column 11c connecting the second bottom plate 11a and the fixing hook 11b. have. The fixed column 11c is mounted inside the guide passage 36 and the position control passage 35, and the fixed hook 11b is located between the first bottom plate 34 and the bottom wall 42a of the case 4 and is mounted inside the fixed hole 32a. The second side plate 32 is engaged, and at this time, the fixing post 11c abuts the end of the position regulating passage 35 near the second side plate 32, and the above fitting installation is achieved by the three dimensions of the second fixing part 11. The position is regulated against and the mounting stability is improved. The plurality of second fixing portions 11 are distributed on the bottom wall of the inner liner 2b while maintaining the same orientation. In this embodiment, the bottom wall of the inner liner 2b is provided with a recess 30 for fixing the second bottom plate 11a, thereby fixing the second fixing part 11 and increasing the height of the space occupied by the second fixing part 11. reduce sag.

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 passage opening 36a of the first fixing part 3, the fixing column 11c corresponds to the position regulation passage opening 35a, Then, push the low-pressure storage unit 15 to second fix the first side plate 31 of the first fixing part 3 until the fixing hook 11b is installed in the fixing hole 32a of the first fixing part 3, that is, until the assembly is completed. It is brought close to the part 11 . As described above, the assembly of the low-pressure storage unit 15 and the inner liner 2b can be completed by direct pressing, which is simple, convenient, quick and efficient.

23 to 26 are schematic configuration diagrams of the air passage mechanism of the low-pressure storage unit of the refrigerator. As shown in FIGS. 23 to 26, the refrigerator 1 has a first air passage 10 communicating with the main air passage and provided adjacent to the low pressure storage unit 15. The first air passage 10 is a low pressure storage unit. extending forward along the top of the unit 15, thereby guiding the cold air to the front end of the low pressure storage unit 15, while at the same time surrounding the first air passage 10 when the cold air flows through the first air passage 10; Cool the area.

The first air passage 10 is flat. The above installation can increase the overlapping area between the first air passage 10 and the low-pressure storage unit 15 to improve the cooling effect. In order to increase the overlapping area between the first air passage 10 and the front end of the low-pressure storage unit 15 and reduce the temperature difference before and after the low-pressure storage unit 15, the first air passage 10 gradually expands along the blowing direction. may be provided as follows.

The front end of the first air passage 10 is provided with a first blowout port 10a located at its tip end surface and a second blowout port 10b located at its lower end surface 5b. The first outlet 10 a guides the cold air forward and diffuses the cold air to the front end of the low pressure storage unit 15 to reduce the temperature difference across the low pressure storage unit 15 . The first blower outlet 10a may be formed so as to gradually shrink along the blowing direction in order to increase the wind speed at the first blower outlet 10a and increase the blowing distance. In this embodiment, the plurality of first outlets 10a are provided at intervals.

The second outlet 10b guides the cold air to the top of the low pressure storage unit 15 and diffuses it at the top of the low pressure storage unit 15 around the second outlet 10b, so that the cold air flows into the low pressure storage unit 15. cover the In the direction from the first air passage 10 to the top of the low-pressure storage unit 15, the second outlet 10b may be provided so as to gradually widen, thereby moderating the wind speed and allowing the cold air to pass through the first air passage 10. It spreads along the gap between the low pressure storage unit 15 and covers the low pressure storage unit 15 .

The distance between the extreme end of the first air passage 10 and the extreme end of the low-pressure storage unit 15 is denoted as L1, and the longitudinal length of the low-pressure storage unit 15 is denoted as L2, where L1:L2∈[ 0.2, 0.8]. The above installation can effectively diffuse the cold air to create a cold environment around the low pressure storage unit 15 , thereby reducing the temperature inside the low pressure storage unit 15 .

Thus, the first air passage 10 introduces cold air around the low pressure storage unit 15 to surround the low pressure storage unit 15 and maintain a cold environment with a lower temperature than the rest of the refrigeration compartment 12, The refrigerated freshness keeping effect of the storage unit 15 can be improved.

In this embodiment, the rear wall of the inner liner 2b is provided with a communication port that communicates with the main air passage, and the first air passage 10 is fixed to the communication port. It should be noted that the present disclosure is not limited to the installation position of the first air passage 10 or the configuration of the first air passage 10, and the present disclosure is directed to other locations and configurations of the low pressure storage unit 15. A first air channel 10 may be applied that guides the cold air to the front end of the low pressure storage unit 15 adjacent to a position, for example a first air channel 10 provided at a position such as the side of the low pressure storage unit 15. You can

27 to 29 are schematic diagrams of the pressure detection unit of the low-pressure storage unit of the refrigerator. As shown in FIGS. 27-29, the refrigerator 1 is installed behind the low-pressure storage unit 15 to monitor and measure the internal pressure of the low-pressure storage unit 15, detect the internal pressure of the low-pressure storage unit 15, and has a pressure detection unit 9 electrically connected to the . When the internal pressure of the low-pressure storage unit 15 becomes higher than a preset value and loses its vacuum refrigeration function, the pressure detection unit 9 sends an evacuation signal to the bleeder, which operates to open the "vacuum chamber". Form. As a result, when the low-pressure storage unit 15 is not open for a long time and the pressure rises due to unavoidable reasons due to air leakage for a long time and reaches a preset value, the air bleed device is operated in a timely manner to restore the low pressure. The degree of vacuum in the storage unit 15 can be ensured, and the effect of preserving the freshness of food can be ensured.

The pressure detection unit 9 has a support 91 projecting from the back of the low pressure storage unit 15 , and the support 91 has a first through hole 91 a communicating with the low pressure storage chamber 14 of the low pressure storage unit 15 . One end of the column 91 remote from the low-pressure storage unit 15 is provided with a rubber seal 92 that seals the end of the column 91 and a pressure switch 93 that contacts the rubber seal 92 . A spring 94 is provided between the rubber seal material 92 and the bottom of the column 91 , and a floating block 95 is provided between the spring 94 and the rubber seal material 92 . When the internal pressure of the low-pressure storage unit 15 rises to a certain extent, the internal pressure of the first through hole 91a of the column 91 rises accordingly, and the floating block 95 is subjected to a certain air pressure action, resisting the tensile force of the spring 94, and is rubber-sealed. The material 92 is pushed to move and the rubber seal material 92 applies pressure to the pressure switch 93 under the action of the floating block 95 thereby triggering the pressure switch 93 . The pressure switch 93 sends a control signal to the control unit, which controls the bleeder to evacuate the low pressure storage unit 15 based on the control signal.

In one embodiment of the present disclosure, 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 and a floating block 45 at the other end of the spring 94. Block 95 is fixed. A second through hole 91 b having a radial dimension larger than that of the first through hole 91 a is provided at one end of the column 91 remote from the low-pressure storage unit 15 , and the end of the column 91 remote from the low-pressure storage unit 15 is provided. A mount 46 for mounting the rubber seal material 92 is formed on the . The floating block 95 is T-shaped and includes a floating plate 95a that abuts against the rubber seal material 92 and has a recessed portion 95c in the center region, and a floating column 95b that is connected to the spring 94. The diameter of the floating plate 95a is The directional dimension is greater than the radial dimension of the floating post 95b. The rubber seal member 92 has a truncated conical shell shape provided at its central portion with a support post 92a that fits into a recessed portion 95c on the floating plate 95a. Among them, the dimension of one end of the truncated conical shell-shaped rubber sealing material 92 away from the mounting base 46 is smaller than the dimension of one end near the mounting base 46 .

A fixing base 47 for mounting the pressure cover 55 is provided on the outer periphery of the column 91 . One side of the pressure cover 55 is provided with an annular recessed groove 56 to be fitted with the post 91 , and a fixing plate 57 corresponding to the fixing base 47 is provided around the outer circumference of the recessed groove 56 . The other side of the pressure cover 55 is provided with a receiving cavity 58 for mounting the pressure switch 93 . Among them, a third through hole 58 a is provided at the bottom of the accommodation cavity 58 so that the rubber seal member 92 is brought into contact with the pressure switch 93 . In this embodiment, an elastic hook 58b for fixing the pressure switch 93 is provided at the cavity opening of the housing cavity 58. As shown in FIG. The end of the post 91 is installed in the annular groove 56 of the pressure cover 55, the inner groove wall of the annular groove 56 presses the rubber seal material 92, the fixing plate 57 is fitted to the fixing base 47, Fixed connection with screws.

The pressure detection unit 9 installed as described above is integrated with the low-pressure storage unit 15 to improve the detection accuracy of the pressure detection unit 9, and the pressure detection unit 9 monitors the internal pressure of the low-pressure storage unit 15 in real time. When the internal pressure of the low-pressure storage unit 15 is higher than the preset value and loses the vacuum refrigeration effect, a vacuum evacuation signal is sent to the extraction device in time, so that the vacuum degree of the low-pressure storage unit 15 is restored. ensure the freshness-keeping effect of food.

The above descriptions are only some examples of the present disclosure, and are not intended to limit the present disclosure in any other form, and any person skilled in the art can apply equivalent changes and equivalent implementations of the above disclosed technical content. Any simple amendments made to the above examples according to the technical essence of the present disclosure, as long as they do not depart from the technical content of the present disclosure, although the examples can be modified or modified to apply to other areas , equivalent changes and modifications still fall within the protection scope of the technical solution of the present disclosure.

Reference Signs List 1 refrigerator 2 housing 4 case 5 door 6 first fitting portion 7 second fitting portion 15 low-pressure storage unit 18 gas filling passage 81 handle

TECHNICAL FIELD The present disclosure relates to the technical field of refrigerators, and more particularly to refrigerators.

[Related Application]
The present disclosure is a Chinese patent application with application number 201922234935.7 filed on December 12, 2019, titled "Refrigerator", application number 201911330651.6 filed on December 20, 2019 , a Chinese patent application titled "refrigerator", filed on December 20, 2019 with application number 201922316459.3, a Chinese patent application titled "refrigerator", and December 20, 2019 It claims priority from a Chinese patent application entitled "Refrigerator" with application number 201922307498.7 filed on January 1, 2019, the entire content of which is incorporated into this application by reference.

Refrigerators occupy an important share of the market as essential electrical appliances for home life. With the increasing consumer demands for the quality of fresh food, the demands on refrigerators are also increasing, requiring higher placement and stronger functions of refrigerators. In particular, it is desirable for stored fresh food to have a longer shelf life, thereby ensuring the freshness of the ingredients and preventing loss of nutrients.

In order to preserve food better, at present, a refrigerator is provided with a vacuum chamber, and the vacuum chamber is evacuated by an evacuation apparatus. The primary effect of evacuation is to remove oxygen within the vacuum chamber so as to prevent food spoilage. However, in order to guarantee the vacuum state, it is necessary to strictly seal the vacuum chamber. It is difficult to open the door because the air pressure inside is lower than the outside air pressure.

An embodiment of the present disclosure provides a refrigerator, the refrigerator comprising:
a housing defining an insulated reservoir;
a low-pressure storage unit housed within the storage chamber, the interior of which can be evacuated to form a pressure below atmospheric pressure outside the housing;
The low pressure storage unit comprises:
a case defining a storage compartment having an access opening for loading and unloading items;
a door for opening and closing the loading/unloading port;
first fitting portions provided at opposite ends of the case;
second fitting portions rotatably provided at both ends of the door for fitting with the first fitting portions on the corresponding sides to achieve locking and unlocking of the door;
a handle positioned on the front side of the door, the end of which is fixedly connected to the second fitting portion on the corresponding side;
a gas filling passage provided in the door for communicating between the inside and outside of the low-pressure storage unit;
a pressure relief device that opens and closes the gas filling passage,
The pressure release device is a rod that interlocks with the second fitting portion, and both ends of the rod are fixed to the second fitting portion on the corresponding side, respectively, and the rotation axis of the second fitting portion is fixed. a rod parallel to
a rotary plate having one end fixedly connected to the rod, the other end rotatably connected to the door, and a rotation axis coinciding with the rotation axis of the second fitting part;
a pressure release member fixed to the rotating plate for opening and closing the gas filling passage,
The second fitting portion rotates around the rotation axis under the driving of the handle, thereby fitting with the first fitting portion to achieve locking and unlocking of the door and the case. At the same time, the second fitting part interlocks and coaxially rotates the rod and the rotary plate, thereby moving the pressure release member to open and close the gas filling passage.

1 is an overall structural schematic diagram of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is an exploded schematic view of a low pressure storage unit of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is a perspective view of a refrigerator case according to some embodiments of the present disclosure; FIG. FIG. 4 is another perspective view of a refrigerator case according to some embodiments of the present disclosure; 1 is an exploded schematic view of a refrigerator door according to some embodiments of the present disclosure; FIG. FIG. 4 is a schematic structural diagram of a low-pressure storage unit when the refrigerator door and case are in the closed position but not locked according to some embodiments of the present disclosure; 1 is a schematic partial cross-sectional view of a low pressure storage unit with a refrigerator door and case in a closed but unlocked position according to some embodiments of the present disclosure; FIG. FIG. 4 is a schematic partial cross-sectional view of another position of the low pressure storage unit when the refrigerator door and case are in a closed but unlocked position according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of a low-pressure storage unit when the refrigerator door and case are locked according to some embodiments of the present disclosure; FIG. 4 is a schematic partial cross-sectional view of a low pressure storage unit when the refrigerator door and case are locked according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of a low-pressure storage unit when the refrigerator door and case are unlocked and separated according to some embodiments of the present disclosure; FIG. 4 is a schematic structural diagram of the relative positions of a bleeder, a low-pressure storage unit and a drain pipe of a refrigerator according to some embodiments of the present disclosure; FIG. 4 is another angle relative position structure of a refrigerator bleed device and a low-pressure storage unit and a drain pipe according to some embodiments of the present disclosure; FIG. FIG. 4 is a schematic structural diagram of relative positions of a drain pipe and an inner liner of a refrigerator according to some embodiments of the present disclosure; 1 is an overall structural schematic diagram of a bleed device of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is a schematic structural diagram of an elastic body of a refrigerator according to some embodiments of the present disclosure; FIG. 1 is an exploded schematic view of a refrigerator bleed apparatus in accordance with some embodiments of the present disclosure; FIG. 1 is a cross-sectional view of a refrigerator bleed apparatus in accordance with some embodiments of the present disclosure; FIG. 1 is a perspective view of a refrigerator case according to some embodiments of the present disclosure; FIG. FIG. 20 is an enlarged schematic structural view of the A region in FIG. 19; FIG. 4 is a schematic structural diagram of relative positions of an inner liner and a case of a refrigerator according to some embodiments of the present disclosure; FIG. 22 is an enlarged schematic structural diagram of a B region in FIG. 21; 1 is a cross-sectional view of a refrigerating compartment of a refrigerator of the present disclosure; FIG. FIG. 24 is an enlarged schematic structural diagram of a C region in FIG. 23; 1 is a perspective view of a cold compartment of a refrigerator according to some embodiments of the present disclosure; FIG. FIG. 26 is an enlarged schematic structural diagram of a D region in FIG. 25; 1 is an exploded perspective view of a pressure sensing unit of a low pressure storage unit of a refrigerator according to some embodiments of the present disclosure; FIG. FIG. 28 is an enlarged schematic structural diagram of an E region in FIG. 27; 1 is a partial cross-sectional view of a schematic diagram of a low pressure storage unit of a refrigerator according to some embodiments of the present disclosure; FIG.

The following further describes the present disclosure in combination with specific examples so that those skilled in the art can better understand and practice the present disclosure. It is not limited to the scope described in the detailed description. It should be noted that the examples and features in the examples in the present disclosure can be arbitrarily combined with each other as long as there is no contradiction.

It should be noted that all directional indications (up, down, left, right, front, back, etc.) in the embodiments of the present disclosure refer to the relative positions and motions of each component in a particular pose (as shown in the drawings). It is only for explaining the situation and the like, and when the specific posture changes, the direction indication also changes accordingly.

Also, references to "first," "second," etc. in this disclosure are used for descriptive purposes only and indicate or imply relative importance or imply the number of technical features indicated. should not be understood as shown in Thus, features defined by "first" and "second" may explicitly or implicitly include at least one such feature.

In addition, the technical solutions in each embodiment may be combined with each other, but should be based on what a person skilled in the art can realize. It is considered that the combination does not exist and does not fall within the scope of protection according to the present disclosure.

1 to 11 are schematic structural diagrams of a locking mechanism of a low-pressure storage unit of a refrigerator. As shown in FIGS. 1-11, the refrigerator 1 comprises an insulated housing 2 including a case 2a, an inner liner 2b, and an insulating layer (not shown) positioned therebetween. Enclosure 2 defines a plurality of insulated storage compartments for storing items such as food. In the present example, these storage compartments are respectively a refrigerating compartment 12 located at the top and a freezer compartment located at the bottom. The storage compartments can be closed by respective box doors. In the present disclosure, the refrigerator compartment 12 is provided with a refrigerating double door, and the freezer compartment is provided with a freezing double door.

It should be noted that the present disclosure should not be limited to the specific distribution of storage compartments of the refrigerator 1, but is also applicable to other configurations of refrigerators 1, such as refrigerators 1 with pull-out doors, for example. .

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 throttling device (not shown) and an evaporator (not shown). Since such a refrigeration system is well known in the prior art, further description is omitted. Of course, refrigerator 1 can also use other forms of refrigeration systems (eg, absorption refrigeration systems, thermoelectric refrigeration systems, etc.).

As shown in FIGS. 1 and 12 , the refrigerator 1 is provided with a low-pressure storage unit 15 capable of maintaining a low-pressure state, and a bleeder for extracting gas from the low-pressure storage unit 15 . The extraction system may include a vacuum pump 22 and a line 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 extraction device to evacuate the low-pressure storage unit 15 in order to realize automatic control of the evacuation of the low-pressure storage unit 15 .

In this embodiment, the low pressure storage unit 15 is provided within the refrigerator compartment 12 . It should be noted that in other embodiments, the low pressure storage unit 15 may be provided in other storage compartments, such as variable temperature rooms that can switch temperature ranges between refrigerated and frozen temperature ranges. .

The low-pressure storage unit 15 is located at the bottom of the refrigerating compartment 12 and supported by the bottom wall of the refrigerating compartment 12 . Adjacent to the low-pressure storage unit 15, a freshness-preserving container 44 suitable for storing foods such as vegetables with high humidity may be provided. are arranged side by side.

The low-pressure storage unit 15 may be configured separately from the housing 2 and assembled within the housing 2 . As shown in FIGS. 2 to 4, in this 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 freshness-keeping container 44 is 12, thereby effectively distributing the bottom space of the refrigerating compartment 12 such that both the fresh-keeping container 44 and the low-pressure storage unit 15 are insertable into and retractable from the refrigerating compartment 12. It is possible.

The low pressure storage unit 15 includes a case 4 that is fixed within the refrigerating compartment 12 and a door 5 that is connected to the case 4 and can be pushed into or pulled out of the refrigerating compartment 12 .

As shown in FIGS. 2-4, the case 4 has a box-like structure and defines a flattened low-pressure storage chamber 14 having a food access opening 14a. In this embodiment, the loading/unloading port 14a is positioned at the front end of the case 4 facing the user.

A grid-like reinforcing rib 40 is provided on the outside of the box wall of the case 4 to improve the strength of the box wall of the case 4 and prevent deformation due to the difference in pressure between the inside and outside after the case 4 is evacuated.

As shown in FIG. 3, the case 4 includes an upper case 41 and a lower case 42 that are connected together to form the low pressure storage chamber 14, and the upper case 41 and the lower case 42 are integrated by ultrasonic welding. Specifically, the lower case 42 includes a bottom wall 42a, a first lower wall 42c, a lower rear wall 42b, a second lower wall 42d, which are sequentially connected and provided at the edge of the bottom wall 42a, and the lower case 42. It includes a front end wall 42e located at the front end and formed with the access opening 14a, where the bottom wall 42a of the lower case is thus the bottom wall of the low pressure storage unit 15. As shown in FIG. In this embodiment, the front end wall 42e has a flat abutment surface 43 which is substantially perpendicular to the horizontal plane and which is used for abutment with the door 5. As shown in FIG.

As shown in FIGS. 3 and 4, the upper case 41 includes a top wall 41a, an upper rear wall 41b, a first upper wall 41c, and a second upper wall 41d which are sequentially connected and provided at the edge of the top wall 41a. The distance between the lower wall surfaces of the first upper wall 41c and the second upper wall 41d of the upper case 41 and the top wall 41a linearly decreases from the rear to the front, and at the front edge of the top wall 41a decrease to 0. That is, the projection of the first upper wall 41c and the second upper wall 41d on a plane perpendicular to the top surface is a triangle.

Here, the upper rear wall 41b and the lower rear wall 42b are put together, the first lower wall 42c and the first upper wall 41c are put together, the second lower wall 42d and the second upper wall 41d are put together, and the ceiling The front end portion of the wall 41a and the front end wall 42e of the lower case 42 are aligned, and the abutment positions are welded and fixed by ultrasonic welding, thereby fixedly connecting the upper case 41 and the lower case 42, and forming a low-pressure storage chamber. 14 are formed. The ultrasonic welding described above effectively improves the connection strength between the upper case 41 and the lower case 42 and ensures the airtightness of the entire case 4 . In addition, the opening 14a of the case 4 formed in the front end wall 42e of the lower case 42 imparts integrity to the opening 14a of the case 4 and effectively secures the airtightness of the case 4. As shown in FIG. Further, the distances between the lower wall surface of the first upper wall 41c and the second upper wall 41d and the top wall 41a linearly decrease from the rear to the front, and further decrease to 0 at the front edge of the top wall 41a. This installation reduces the number of abutting surfaces on which the upper case 41 and the lower case 42 are mated, and improves the airtightness of the case 4 as a whole, particularly the airtightness at the insertion/removal port 14a of the case 4 . On the other hand, by providing the case 4 as a separate structure having the upper case 41 and the lower case 42, processing of the grid-like reinforcing ribs 40 becomes convenient.

As shown in FIG. 6, the door 5 can be provided with an annular sealing element 16 so that a gas-tight joint is formed between the case 4 and the door 5 when the door 5 is in the closed position, and the case Intrusion of gas into the low-pressure storage chamber 14 from the joint between the door 4 and the door 5 can be prevented. The sealing element 16 may be provided at the front end of the case 4, eg connected to the front end wall 42e.

When the low pressure storage chamber 14 is closed by the door 5 and the bleed system is activated, the gas located within 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 disclosure, at the end of the evacuation process, the pressure within low pressure reservoir 14 is between normal atmospheric pressure and absolute vacuum. Because the air pressure within low-pressure storage chamber 14 is below normal atmospheric pressure, it is also commonly referred to by those skilled in the art as a "vacuum chamber."

As shown in FIG. 2, the door 5 is a drawer type door. The door 5 can be pushed into the case 4 to close the opening 14a of the low-pressure storage chamber 14, or pulled out of the case 4 to open the low-pressure storage chamber 14. can do. A tray-shaped storage container 54 used for storage is connected to the rear side of the door 5 . The user moves the storage container 54 into and out of the low pressure storage chamber 14 so as to retrieve items in the low pressure storage unit 15 and store items in the low pressure storage unit 15 . The door 5 constitutes a drawer unit that can be put in and taken out from the case 4 together with the storage container 54 .

A stretchable guide rail unit 17 may be provided between the storage container 54 and the case 4 . As a result, the door 5 and the storage container 54 can be smoothly pulled out of the case 4 or pushed into the case 4 .

Low pressure storage unit 15 includes a pair of locking mechanisms for locking door 5 and case 4 in the closed position. As shown in FIGS. 2 to 11, each locking mechanism includes a first fitting portion 6 provided in the case 4 and a rotatable portion provided at both ends of the door 5 about the rotation axis X. and a second fitting portion 7 for fitting with the first fitting portion 6 of the door 5 to realize locking and unlocking of the door 5 . The door 5 is locked in the closed position by coupling the second fitting portion 7 and the first fitting portion 6, and the sealing element 16 between the case 4 and the door 5 is sufficiently pressed by the locking force of the locking mechanism. , and the airtightness between the door 5 and the case 4 is improved.

A first lower wall 42c and a second lower wall 42d near the loading/unloading port 14a of the case 4 are both provided with a lock accommodating portion 61 and a first fitting portion 6 located in the lock accommodating portion 61. As shown in FIG. 7, the case 4 includes a first enclosure 60a parallel to the bottom wall 42a of the case 4, a rear end portion of the first enclosure 60a away from the entrance 14a, and A second enclosure plate 60b extending forward and downward to the foremost end of the case 4 is provided. The first enclosing plate 60 a and the second enclosing plate 60 b are connected to form a lock receiving portion 61 . The lock accommodating portion 61 is formed with a passage opening 64 for inserting or withdrawing the second fitting portion 7 at the frontmost end of the case 4 . In this embodiment, the end faces of the first enclosing plate 60a and the second enclosing plate 60b away from the box wall of the case 4 and the end face of the reinforcing rib 40 away from the box wall of the case 4 are common end faces. The installation in which the end face of the first fitting portion 6 away from the box wall of the case 4 and the end face of the reinforcing rib 40 away from the box wall of the case 4 are used as a common end face reduces the space occupied by the low-pressure storage unit 15. Space can be fully utilized without increasing it.

The first fitting portion 6 includes a lock portion 62, which is fixed to the first enclosure plate 60a in the lock housing portion 61, and the lock portion 62 has a lock wall 62a perpendicular to the first enclosure plate 60a. and an inclined guide wall 62b, one end of which is connected to the end of the lock wall 62a away from the first enclosure 60a and the other end of which is close to the opening 14a of the first enclosure 60a. connected to the ends.

As shown in FIG. 6, the upper portion of the lock accommodating portion 61 on at least one side of the case 4 is electrically connected to the air bleeder, and is engaged with the second fitting portion 7 to lock and unlock the door 5. A position sensing device is provided for detecting the condition. The position detection device includes a limit switch 63 fixedly attached to the case and a limit push rod 63a slidably connected to the case, the limit switch 63 having a trigger portion, the limit push rod 63a One end is fitted with the trigger portion, the other end is fitted with the second fitting portion 7, and when the second fitting portion 7 slides along the lock wall 62a, the limit push rod 63a is pushed to move, This triggers the limit switch 63 . As shown in FIG. 7, the first enclosure plate 60a is provided with a guide wall 62b and openings 65 located on both sides of the lock wall 62a, and the openings 65 are provided adjacent to the lock wall 62a. A limit push rod 63a of the limit switch 63 protrudes into the lock accommodating portion 61 through the opening 65 and is positioned near the lock wall 62a.

A decorative cover 8 is connected to the door 5, as shown in FIGS. A connection member 83 is provided at two opposite ends of the door 5 , and the second fitting portion 7 is rotatably provided on the connection member 83 . The second fitting portion 7 rotates about its rotation axis X, and rotates the handle 81 fixed thereto in conjunction with it.

One second fitting portion 7 is fixed to each end of the handle 81 . In this embodiment, the second fitting portion 7 is fixed to the corresponding end of the handle 81 and then fixed to the handle 81 by a fixing device such as a screw so as not to move relative to the handle 81 . When the handle 81 rotates, the second fitting portion 7 also rotates about the rotation axis X. As shown in FIG.

As shown in FIGS. 5 and 10, in some embodiments of the present disclosure, the second fitting portion 7 includes a lock plate rotatable about the rotation axis X, and the axis of the rotation axis X is horizontal. direction and has a predetermined distance from the handle 81 . A protruding block 72 is provided on the side of the lock plate facing the side wall of the case 4, and when the lock plate rotates about the rotation axis X under the driving of the handle 81, the protruding block 72 moves along the guide wall 62b. slid to the rear side of the lock wall 62a to lock the door 5 and case 4.

As shown in FIG. 5, the locking plate has a flat plate shape and includes a first slat 71a, a second slat 71b and a third slat 71c that are successfully connected in sequence. extends to form a fourth slat 71d located on the same side of the first slat 71a and the third slat 71c and forming an acute angle with the first slat 71a.

The intermediate position of the second slat 71b is rotatably fixed to the connecting member 83 at the end of the door 5, and the protruding block 72 is provided at the connecting point between the second slat 71b and the third slat 71c. The end of fourth slat 71d remote from third slat 71c is fixed to the corresponding end of handle 81 . When the handle 81 rotates, the handle 81 interlocks the entire second fitting portion 7 so as to rotate around the rotation axis X located at the intermediate position of the second slat 71b through the fourth slat 71d. Let

A gas filling passage 18 (as shown in FIG. 5) for communicating between the inside and outside of the low-pressure storage unit 15 and a pressure relief device for opening and closing the gas filling passage 18 may be provided on the front side of the door 5. . The pressure release device includes a rod 20 interlocking with the second fitting portion 7, a rotary plate 59 fixedly connected to the rod 20, and a pressure release member 19 fixed to the rotary plate 59 for opening and closing the gas filling passage 18. include. Wherein, both ends of the rod 20 are respectively fixed to corresponding locking plates, the rod 20 and the projecting block 72 are positioned on both sides of the rotation axis X, and the rotation axis of the rotation plate 59 is aligned with the second fitting part. When the second fitting part 7 rotates about the rotation axis X under the driving of the handle 81, the rod 20 and the rotation plate 59 are coaxially rotated, and the pressure release member 19 is Close the gas filling passage 18 . Wherein, both ends of the rod 20 pass through the decorative cover 8, and the first slats 71a of the second fitting portion 7 are fixed to corresponding ends of the rod 20 so as not to move relative to each other. Avoidance holes 39 are provided on both sides of the decorative cover 8 to coincide with the trajectory of the rotational movement of the rod 20 (as shown in FIG. 2) , and the rod 20 rotates between the door 5 and the decorative cover 8. There is a gap for

As shown in FIG. 5 in conjunction with FIG. 2, the door 5 has a receiving cavity 52 recessed rearwardly from its front surface 5a for receiving at least part of the pressure relief device. The gas filling passage 18 is provided in the cavity wall of the storage cavity 52 away from the decorative cover 8, communicates the low pressure storage chamber 14 and the storage cavity 52, and has a rotation axis X as a central axis in the storage cavity 52. A protruding column 53 is provided, and a rotating plate 59 has one end fixed to the rod 20 and the other end fixed in the housing cavity 52 so as to be rotatable about the protruding column 53 . A torsion spring is provided inside and outside the rotating plate 59 . When the door 5 and the case 4 are locked, the first fitting portion 6 and the second fitting portion 7 are locked, the torsion spring clamps the rotating plate 59, and the pressure release member 19 is moved to the gas filling passage. 18 is clamped. When the door 5 is in the closed position but not yet locked, after releasing the applied external force, under the action of the torsion spring, the rotary plate 59 is pushed downward and inwardly, and the rotary plate 59 is pushed downward to the second position. 2. The fitting part 7 and the handle 81 are interlocked to rotate inward and downward, so that when the user closes the door, the user 's action force can be reduced, the closing operation can be simplified, and the torsion The spring can limit the maximum upward and forward rotation of the handle 81 so that when the handle 81 continues to rotate and the upper end of the handle 81 approaches the front surface 5 a of the door 5 , the user's hand will not move toward the handle 81 . and the door 5 can be prevented from being caught.

According to some embodiments of the present disclosure, the end of the rotating plate 59 is provided with a polygonal cross-sectional fixed passageway for mounting the rod 20, the cross-sectional shape of the rod 20 being similar to the cross-sectional shape of the fixed passageway. The matching, polygonal cross-section installation makes it impossible to create relative rotational motion between the rod 20 and the rotating plate 59 .

As shown in FIGS. 6-8, the door 5 is in the closed but not yet unlocked position, with the handle 81 in the first position. When the user pushes the handle 81 downward and rearward, the handle 81 rotates inward about the rotation axis X of the second fitting 7 , and at the same time the handle 81 rotates between the second fitting 7 and the rod 20 . are interlocked to rotate inward, and the protruding block 72 of the second fitting portion 7 gradually approaches the side away from the insertion/removal port 14a of the lock portion 62, and at the same time, gradually reaches the limit push rod 63a of the limit switch 63. get closer to The rod 20 interlocks the rotating plate 59 to rotate inward, and the rotating plate 59 interlocks the pressure release member 19 to gradually approach the gas filling passage 18 .

As shown in FIGS. 9 and 10, the door 5 and case 4 are locked, and the handle 81 is at the second position. When the handle 81 is rotated to the second position, the second fitting portion 7 rotates into the lock receiving portion 61, and the protruding block 72 on the second fitting portion 7 is adjacent to the rear side of the lock wall 62a. further push the limit push rod 63a to move upward, triggering the limit switch 63, the limit switch 63 sends a control signal that the door is closed to the control unit, and the control unit responds to the control signal. to control the air bleed system and start air bleed. At this time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to block the gas filling passage 18, and the low pressure storage chamber 14 becomes a closed space. The installation of the limit switch 63 electrically connected to the first fitting portion 6, the second fitting portion 7, and the air bleed device makes it possible to immediately monitor and measure the locked state of the door 5 and the case 4. When the door 5 and the case 4 are locked, the evacuation signal is immediately sent to the bleeder to ensure the vacuum degree of the low-pressure storage unit 15 and to ensure the effect of preserving the freshness of the food.

As shown in FIG. 11, when the door 5 and the case 4 are in the unlocked and separated open state, the door 5 is pushed closed. As a form of closing the door, the user can lift the handle 81 upwards and push it toward the case 4, and pull the handle 81 downwards and backwards when the door 5 is in the closed but not yet unlocked position. When pressed, the locking is completed, and at the same time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to block the gas filling passage 18 . As another form of closing the door, the user can push the decorative cover 8 directly. In conjunction with the decorative cover 8, the second fitting portion 7 moves parallel to the lock housing portion 61, the protruding block 72 on the second fitting portion 7 contacts the guide wall 62b of the lock portion 62, Under the horizontal pushing force and the action of the guide wall 62b, the protruding block 72 moves downward along the guide wall 62b, causing the second fitting portion 7 to rotate downward about the rotation axis X. , the protruding block 72 moves downward to gradually approach the connection point between the guide wall 62b and the lock wall 62a, continues to push the door 5 toward the case 4, and the protruding block 72 moves behind the lock wall 62a. The door 5 and the case 4 are locked, and at the same time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to block the gas filling passage 18 . In the present disclosure, the closed door mode of directly pressing the decorative cover 8 on the front side of the door 5 to close it does not use the handle 81, which is convenient and comfortable, reduces the user's effort of placing the biasing point on the handle 81, and at the same time , under the action of the guide wall 62b, the locking process is smooth and stable, avoiding collision.

When the door 5 and the case 4 are locked and the door 5 is to be opened, the user holds the lower end of the handle 81 and lifts it upward and outward, and the handle 81 rotates about the rotation axis X, The second fitting portion 7 fixed to the connecting member 83 rotates upward. During this process, the rod 20 rotates upward, causing the rotary plate 59 to rotate upward around the rotation axis X, and the pressure release member 19 also releases the blockage of the gas filling passage 18, and the outside air is released from the gas filling. Passageway 18 leads into low pressure reservoir 14 to balance internal and external pressures. After that, the user can open the door 5 by holding the handle 81 and pulling it forward.

The second fitting portion 7 and the first fitting portion 6 described above can complete locking without increasing the space occupied by the low-pressure storage unit 15, and are compact in structure and stable in fitting.

The mating of the second mating portion 7 and the first mating portion 6 in the locked position provides a locking force between the door 5 and the case 4 and sufficiently deforms the sealing element 16, thereby allowing the door to To improve the airtightness between 5 and case 4.

When the handle 81 is in the position shown in FIGS. 9 and 10, the gas filling passage 18 is tightly closed by the pressure relief member 19, and when the handle 81 is in the position shown in FIGS. Already opened, outside air can enter the low-pressure storage chamber 14 through the gas filling passage 18 and thus relieve the low-pressure state of the low-pressure storage chamber 14 . In another embodiment, the gas filling passage 18 and the pressure release member 19 can be provided independently of the handle 81. For example, the door 5 is provided with a button. By pressing this button, the gas filling passage 18 is opened, and then the user opens the door 5 by operating the handle 81 again.

As shown in FIG. 11, a region near the lower end surface 5b of the door 5 is recessed rearward from the front surface 5a to form an accommodation space 82 for accommodating a handle 81. In this embodiment, the lower end of the accommodation space 82 extends to the lower end surface 5b of the door 5, and both left and right ends extend to the side end surfaces 5c of the door 5. As shown in FIG. When the door 5 is in the locked state, the handle 81 is located within the storage space 82, and the front surface of the handle 81 is flush with the front surface 5a of the door 5 located above the storage space 82, thereby The occupied volume of the low pressure storage unit 15 is reduced. Particularly preferably, the handle 81 in the second position is completely received within the receiving space 82 of the door 5 and does not extend beyond the front surface of the door 5 . The handle 81 is in the first position when the door 5 is in the closed but not yet unlocked position, the handle 81 is out of the receiving space 82 and located in front of the front surface 5a of the door 5. 81 in the first position occurs when the user opens the low pressure storage unit 15, at which time the door of the refrigerator 1 is open, affecting the interior space of the refrigerator 1 occupied by the low pressure storage unit 15. Absent.

When the door of the refrigerator 1 is closed and the door 5 of the low pressure storage unit 15 is in the closed position and the handle 81 is in the second position (return position), the low pressure storage unit 15 will be damaged when closing the door. A constant distance is maintained between the inside of the door and the handle 81 so as to avoid Therefore, by providing the handle 81 within the housing space 82, the distance between the low-pressure storage unit 15 and the inner side of the door of the refrigerator 1 can be reduced, thereby improving the space utilization of the refrigerator 1. .

A decorative cover 8 is connected to the door 5 so as to shield the pressure relief device from the front of the door 5 . Thereby, the rod 20 as a whole is positioned within the door 5 .

The handle 81 is rotatably connected to the door 5 after being fixed to the door 5 . When the handle 81 is rotated, the second fitting portion 7 rotates, and both the rod 20 and the rotating plate 59 rotate about the rotation axis X. As shown in FIG.

The handle 81 is rotatable about the rotation axis X between a first position and a second position. At the first position, the included angle formed between the handle 81 and the wall surface of the housing space 82 of the door 5 near the case 4 is maximum, and the angle between the lower end of the handle 81 and the wall surface of the housing space 82 of the door 5 near the case 4 is Since the maximum distance is formed, the first position can also be referred to as the extended position. At the second position, the included angle between the handle 81 and the wall surface of the housing space 82 of the door 5 near the case 4 is the smallest, and the distance between the lower end of the handle 81 and the wall surface of the housing space 82 near the case 4 is the minimum. is formed, the second position can also be said to be a turn-back position. Correspondingly, the second fitting portion 7 interlocking with the handle 81 and the rod 20 interlocking with the second fitting portion 7 are also restricted to rotate between the first limit position and the second limit position. , where when the handle 81 is in the first position, the second fitting 7 and the rod 20 are both in the first limit position (as shown in FIGS. 6 and 8), and the handle 81 is in the second position. , both the second fitting portion 7 and the rod 20 are at the second limit position (state shown in FIG. 9).

12 to 14 are schematic structural diagrams of the exhaust installation of the low-pressure storage unit of the refrigerator. As shown in FIGS. 12 to 14, refrigerator 1 has drain pipe 21 for discharging condensed water inside refrigerator 1 . One end of the air extraction device communicates with the low pressure storage unit 15 and the other end communicates with the drain pipe 21 of the refrigerator 1 . The air bleeder operates to extract the air in the low pressure storage unit 15 and transport it to the drain 21 where it is finally discharged from the refrigerator 1 by the drain 21 . This prevents the gas extracted from the low-pressure storage unit 15 from entering directly into the refrigerator 1 to transfer smells of foods in other areas of the refrigerator compartment 12 to affect the freshness-preserving effect of the foods. do.

The extraction system includes a vacuum pump 22 , a first line 23 connecting the vacuum pump 22 and the low pressure storage unit 15 , and a second line 24 connecting the vacuum pump 22 and the drain line 21 . A vacuum pump 22 is provided in the inner liner 2 b of the cold room 12 and near the bottom of the low pressure storage unit 15 .

At a position near the rear end of the top of the low-pressure storage unit 15, an air extraction port connected to the first pipeline 23 is provided, and the drain pipe 21 is provided with an exhaust port connected to the second pipeline 24. .

The vacuum pump 22 has a pump, a bleed pipe 22 a communicating with the first conduit 23 , and an exhaust pipe 22 b communicating with the second conduit 24 . The bleed pipe 22a of the vacuum pump 22 is parallel to the exhaust pipe 22b and located at the same end of the vacuum pump 22, and the first pipe 23 is fixed to the bleed port of the low-pressure storage unit 15 and bent. turn and extend along the edge of the rear end top of the low-pressure storage unit 15, then turn 90 degrees toward the rear wall of the inner liner 2b at the first turning position A1, and the ceiling wall 41a of the low-pressure storage unit 15; and extends to a second turning position B1, turns 90 degrees again at the second turning position B1, extends downward to a third turning position C1, turns again at the third turning position C1, and extracts. In a plane communicating with the trachea 22a and in which the bottom wall 42a of the low- pressure storage unit 15 is located, the projection of the second turning position B1 and the projection of the third turning position C1 on that plane are is also on the extension of the projection of the bleed pipe 22a on that plane. Also, the projection of the first turning position A1 falls on the bottom wall 42a of the low-pressure storage unit 15, and the projection of the second turning position B1 is the projection of the rear wall of the inner liner 2b and the projection of the rear wall of the low-pressure storage unit 15. located between Wherein, the projection of the second turning position B1 overlaps the projection of the third turning position C1. The second conduit 24 communicates with the exhaust pipe 22 b of the vacuum pump 22 , passes through the inner liner 2 b and communicates with the exhaust port on the drain pipe 21 . The above-mentioned multiple turning installation of the first pipeline 23 aligns the path of the pipelines and reduces the space occupied in the direction perpendicular to the rear wall of the inner liner 2b of the pipelines, thereby allowing the low-pressure storage unit 15 increase the available space for

It should be noted that the present disclosure should not be limited to the turning configuration of the bleed pipe 22a described above, and the present disclosure may be applied to other turning configurations to reduce the occupied space of the duct.

15 to 18 are schematic structural diagrams of an air bleeder for a refrigerator. As shown in FIGS. 15 to 18, the bleeding device includes a pump case 27 and an elastic body 28 fitted between the pump and the pump case 27. As shown in FIGS. The pump case 27 is provided with a connection plate 27a fixed to the rear wall of the inner liner 2b. and are fixedly connected by screws.

As shown in FIGS. 16 and 17, the elastic body 28 has a body portion 74 to which the vacuum pump 22 is attached. The radial dimension of the mounting cavity 74a of the portion 74 is smaller than the radial dimension of the corresponding position of the vacuum pump 22, so that the elastic body 28 is closely attached to the vacuum pump 22 and the vibration of the vacuum pump 22 is immediately absorbed.

A positioning block 22c is provided at one end of the vacuum pump 22 opposite to the side on which the extraction pipe 22a and the exhaust pipe 22b are provided. The other end is provided with an end cover 76 that fits with the end of the vacuum pump 22, the end cover 76 is provided with a positioning hole 76a that fits with the positioning block 22c, This protects the ends of the vacuum pump 22 .

A plurality of protrusions 77 are arranged along the central axis of the body portion 74 and surround the body portion 74 on the outer periphery of the body portion 74 . The outer diameter dimension of the main body portion 74 of the elastic body 28 is smaller than the inner diameter dimension of the pump case 27, and the outer diameter dimension of the protrusion 77 of the elastic body 28 is greater than the inner diameter dimension of the pump case 27. When installed inside the pump case 27 , the elastic body 28 is pressed and installed between the pump case 27 and the vacuum pump 22 , forming air cavities between the plurality of projections 77 , whereby the elastic body 28 improve the vibration noise reduction effect of

The projection 77 is provided with a notch 77a, and the positions of the notch 77a in the plurality of projections 77 correspond to each other. Ensure deformation ability and improve vibration noise reduction effect. In this embodiment, the notch 77a is semi-circular. The plurality of notches 77a are evenly distributed on the projection 77. As shown in FIG. Note that the present disclosure is not limited to the shape and number of cutouts 77a described above, and cutouts 77a of other shapes may be applied. For example, the present disclosure may provide four arcuate cutouts 77a on one protrusion 77 .

The pump case 27 includes a first case 27b and a second case 27c. The first case 27b and the second case 27c are locked and attached to the outside of the elastic body . As described above, the pump case 27 is provided separately and is convenient for attachment and detachment.

19 to 22 are schematic configuration diagrams of a fixing mechanism for a low-pressure storage unit of a refrigerator. As shown in Figures 19-22, the refrigerator 1 includes a plurality of securing mechanisms for connecting the low pressure storage unit 15 and the inner liner 2b. Each fixing mechanism includes a first fixing part 3 provided on the bottom wall 42a of the low-pressure storage unit 15 and a second fixing part 11 provided on the bottom wall of the inner liner 2b of the refrigerating compartment 12. By coupling the fixing part 3 and the second fixing part 11 , the low pressure storage unit 15 is fixed to the refrigerator compartment 12 .

As shown in FIG. 20, the first fixing part 3 has a first side plate 31, a second side plate 32 and a third side plate 33 which are connected in sequence, where the first side plate 31 and the third side plate 33 are , are both perpendicular to the second side plate 32 and located on the same side of the second side plate 32 , thereby forming a guide passage 36 between the first side plate 31 and the third side plate 33 , away from the second side plate 32 . A guide passage port 36a is formed at the other end. The second side plate 32 is provided with a fixing hole 32a. A first bottom plate 34 is provided at one end of the second side plate 32 away from the bottom wall 42 a of the case 4 . The first bottom plate 34 connects the second side plate 32 and the third side plate 33 and A position regulating passage 35 is formed in , the position regulating passage 35 extends in a direction away from the second side plate 32 , and a position regulating passage opening is formed at the end of the first bottom plate 34 away from the second side plate 32 . 35a is formed, that is, the directions of the guide passage opening 36a and the position regulation passage opening 35a are the same. Here, the position regulation passage 35 can be set so as to gradually expand along the direction from the second side plate 32 toward the position regulation passage opening 35a. The plurality of first fixing parts 3 are distributed on the bottom wall 42a of the low-pressure storage unit 15 while maintaining the alignment of the guide passage opening 36a. In this embodiment, four first fixing portions 3 are provided in two sets of two rows. The guide passage port 36a of the guide passage 36 is positioned toward the rear side of the case 4 or on one side away from the freshness keeping container 44, thereby creating a gap between the low-pressure storage unit 15 and the inner liner 2b after installation. is reduced as much as possible, the internal space of the refrigerator 1 is fully utilized, the mounting space for mounting the low-pressure storage unit 15 is avoided in advance, and the space occupied by the low-pressure storage unit 15 is reduced.

As shown in FIG. 22, the second fixing portion 11 includes a second bottom plate 11a fixed to the bottom wall of the inner liner 2b, a fixing hook 11b fitted into the fixing hole 32a, and the second bottom plate 11a and the fixing hook 11b. has a fixed column 11c connecting the . The fixed column 11c is mounted inside the guide passage 36 and the position control passage 35, and the fixed hook 11b is located between the first bottom plate 34 and the bottom wall 42a of the case 4 and is mounted inside the fixed hole 32a. The second side plate 32 is engaged, and at this time, the fixing post 11c abuts the end of the position regulating passage 35 near the second side plate 32, and the above fitting installation is achieved by the three dimensions of the second fixing part 11. The position is regulated against and the mounting stability is improved. The plurality of second fixing portions 11 are distributed on the bottom wall of the inner liner 2b while maintaining the same orientation. In this embodiment, the bottom wall of the inner liner 2b is provided with a recess 30 for fixing the second bottom plate 11a, thereby fixing the second fixing part 11 and increasing the height of the space occupied by the second fixing part 11. reduce sag.

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 passage opening 36a of the first fixing part 3, the fixing column 11c corresponds to the position regulation passage opening 35a, Then, push the low-pressure storage unit 15 to second fix the first side plate 31 of the first fixing part 3 until the fixing hook 11b is installed in the fixing hole 32a of the first fixing part 3, that is, until the assembly is completed. It is brought close to the part 11 . As described above, the assembly of the low-pressure storage unit 15 and the inner liner 2b can be completed by direct pressing, which is simple, convenient, quick and efficient.

23 to 26 are schematic configuration diagrams of the air passage mechanism of the low-pressure storage unit of the refrigerator. As shown in FIGS. 23 to 26, the refrigerator 1 has a first air passage 10 communicating with the main air passage and provided adjacent to the low pressure storage unit 15. The first air passage 10 is a low pressure storage unit. extending forward along the top of the unit 15, thereby guiding the cold air to the front end of the low pressure storage unit 15, while at the same time surrounding the first air passage 10 when the cold air flows through the first air passage 10; Cool the area.

The first air passage 10 is flat. The above installation can increase the overlapping area between the first air passage 10 and the low-pressure storage unit 15 to improve the cooling effect. In order to increase the overlapping area between the first air passage 10 and the front end of the low-pressure storage unit 15 and reduce the temperature difference before and after the low-pressure storage unit 15, the first air passage 10 gradually expands along the blowing direction. may be provided as follows.

The front end of the first air passage 10 is provided with a first blowout port 10a located at its tip end surface and a second blowout port 10b located at its lower end surface 5b. The first outlet 10 a guides the cold air forward and diffuses the cold air to the front end of the low pressure storage unit 15 to reduce the temperature difference across the low pressure storage unit 15 . The first blower outlet 10a may be formed so as to gradually shrink along the blowing direction in order to increase the wind speed at the first blower outlet 10a and increase the blowing distance. In this embodiment, the plurality of first outlets 10a are provided at intervals.

The second outlet 10b guides the cold air to the top of the low pressure storage unit 15 and diffuses it at the top of the low pressure storage unit 15 around the second outlet 10b, so that the cold air flows into the low pressure storage unit 15. cover the In the direction from the first air passage 10 to the top of the low-pressure storage unit 15, the second outlet 10b may be provided so as to gradually widen, thereby moderating the wind speed and allowing the cold air to pass through the first air passage 10. It spreads along the gap between the low pressure storage unit 15 and covers the low pressure storage unit 15 .

The distance between the extreme end of the first air passage 10 and the extreme end of the low-pressure storage unit 15 is denoted as L1, and the longitudinal length of the low-pressure storage unit 15 is denoted as L2, where L1:L2∈[ 0.2, 0.8]. The above installation can effectively diffuse the cold air to create a cold environment around the low pressure storage unit 15 , thereby reducing the temperature inside the low pressure storage unit 15 .

Thus, the first air passage 10 introduces cold air around the low pressure storage unit 15 to surround the low pressure storage unit 15 and maintain a cold environment with a lower temperature than the rest of the refrigeration compartment 12, The refrigerated freshness keeping effect of the storage unit 15 can be improved.

In this embodiment, the rear wall of the inner liner 2b is provided with a communication port that communicates with the main air passage, and the first air passage 10 is fixed to the communication port. It should be noted that the present disclosure is not limited to the installation position of the first air passage 10 or the configuration of the first air passage 10, and the present disclosure is directed to other locations and configurations of the low pressure storage unit 15. A first air channel 10 may be applied that guides the cold air to the front end of the low pressure storage unit 15 adjacent to a position, for example a first air channel 10 provided at a position such as the side of the low pressure storage unit 15. You can

27 to 29 are schematic diagrams of the pressure detection unit of the low-pressure storage unit of the refrigerator. As shown in FIGS. 27-29, the refrigerator 1 is installed behind the low-pressure storage unit 15 to monitor and measure the internal pressure of the low-pressure storage unit 15, detect the internal pressure of the low-pressure storage unit 15, and has a pressure detection unit 9 electrically connected to the . When the internal pressure of the low-pressure storage unit 15 becomes higher than a preset value and loses its vacuum refrigeration function, the pressure detection unit 9 sends an evacuation signal to the bleeder, which operates to open the "vacuum chamber". Form. As a result, when the low-pressure storage unit 15 is not open for a long time and the pressure rises due to unavoidable reasons due to air leakage for a long time and reaches a preset value, the air bleed device is operated in a timely manner to restore the low pressure. The degree of vacuum in the storage unit 15 can be ensured, and the effect of preserving the freshness of food can be ensured.

As shown in FIG. 28 , the pressure detection unit 9 has a support 91 protruding from the back of the low pressure storage unit 15 , and the support 91 has a first through hole 91 a communicating with the low pressure storage chamber 14 of the low pressure storage unit 15 . have. One end of the column 91 remote from the low-pressure storage unit 15 is provided with a rubber seal 92 that seals the end of the column 91 and a pressure switch 93 that contacts the rubber seal 92 . A spring 94 is provided between the rubber seal material 92 and the bottom of the column 91 , and a floating block 95 is provided between the spring 94 and the rubber seal material 92 . When the internal pressure of the low-pressure storage unit 15 rises to a certain extent, the internal pressure of the first through hole 91a of the column 91 rises accordingly, and the floating block 95 is subjected to a certain air pressure action, resisting the tensile force of the spring 94, and is rubber-sealed. The material 92 is pushed to move and the rubber seal material 92 applies pressure to the pressure switch 93 under the action of the floating block 95 thereby triggering the pressure switch 93 . The pressure switch 93 sends a control signal to the control unit, which controls the bleeder to evacuate the low pressure storage unit 15 based on the control signal.

As shown in FIG. 29, in one embodiment of the present disclosure, 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 a spring 94 to A floating block 95 is fixed to the other end of 94 . A second through hole 91 b having a radial dimension larger than that of the first through hole 91 a is provided at one end of the column 91 remote from the low-pressure storage unit 15 , and the end of the column 91 remote from the low-pressure storage unit 15 is provided. A mount 46 for mounting the rubber seal material 92 is formed on the . The floating block 95 is T-shaped and includes a floating plate 95a that abuts against the rubber seal material 92 and has a recessed portion 95c in the center region, and a floating column 95b that is connected to the spring 94. The diameter of the floating plate 95a is The directional dimension is greater than the radial dimension of the floating post 95b. The rubber seal member 92 has a truncated conical shell shape provided at its central portion with a support post 92a that fits into a recessed portion 95c on the floating plate 95a. Among them, the dimension of one end of the truncated conical shell-shaped rubber sealing material 92 away from the mounting base 46 is smaller than the dimension of one end near the mounting base 46 .

As shown in FIG. 28 , a fixing base 47 for mounting the pressure cover 55 is provided on the outer periphery of the support 91 . One side of the pressure cover 55 is provided with an annular recessed groove 56 to be fitted with the post 91 , and a fixing plate 57 corresponding to the fixing base 47 is provided around the outer circumference of the recessed groove 56 . The other side of the pressure cover 55 is provided with a receiving cavity 58 for mounting the pressure switch 93 . Among them, a third through hole 58 a is provided at the bottom of the accommodation cavity 58 so that the rubber seal member 92 is brought into contact with the pressure switch 93 . In this embodiment, an elastic hook 58b for fixing the pressure switch 93 is provided at the cavity opening of the housing cavity 58. As shown in FIG. The end of the post 91 is installed in the annular groove 56 of the pressure cover 55, the inner groove wall of the annular groove 56 presses the rubber seal material 92, the fixing plate 57 is fitted to the fixing base 47, Fixed connection with screws.

The pressure detection unit 9 installed as described above is integrated with the low-pressure storage unit 15 to improve the detection accuracy of the pressure detection unit 9, and the pressure detection unit 9 monitors the internal pressure of the low-pressure storage unit 15 in real time. When the internal pressure of the low-pressure storage unit 15 is higher than the preset value and loses the vacuum refrigeration effect, a vacuum exhaust signal is timely sent to the extraction device, so that the vacuum degree of the low-pressure storage unit 15 is restored. ensure the freshness-keeping effect of food.

The above descriptions are only some examples of the present disclosure, and are not intended to limit the present disclosure in any other form, and any person skilled in the art can apply equivalent changes and equivalent implementations of the above disclosed technical content. Any simple amendments made to the above examples according to the technical essence of the present disclosure, as long as they do not depart from the technical content of the present disclosure, although the examples can be modified or modified to apply to other areas , equivalent changes and modifications still fall within the protection scope of the technical solution of the present disclosure.

Reference Signs List 1 refrigerator 2 housing 4 case 5 door 6 first fitting portion 7 second fitting portion 15 low-pressure storage unit 18 gas filling passage 81 handle

Claims (20)

a refrigerator,
a housing defining an insulated reservoir;
a low-pressure storage unit contained within the storage chamber, the interior of which can be evacuated to create a pressure below atmospheric pressure outside the enclosure;
The low pressure storage unit comprises:
a case defining a storage compartment having an access opening for loading and unloading items;
a door for opening and closing the loading/unloading port;
first fitting portions provided at opposite ends of the case;
second fitting portions provided at both ends of the door so as to be rotatable about a rotation axis X and fitting with the first fitting portions on the corresponding sides to achieve locking and unlocking of the door; ,
a handle positioned on the front side of the door, the end of which is fixedly connected to the second fitting portion on the corresponding side;
a gas filling passage provided in the door for communicating between the inside and outside of the low-pressure storage unit;
a pressure relief device that opens and closes the gas filling passage,
The pressure relief device is
a rod interlocking with the second mating portion, wherein both ends of the rod are fixed to the second mating portion on corresponding sides and are parallel to the rotation axis X;
a rotating plate that is fixedly connected to the rod and whose rotational axis coincides with the rotational axis of the second fitting portion;
a pressure release member fixed to the rotating plate for opening and closing the gas filling passage,
The second fitting part rotates under the drive of the handle, thereby fitting with the first fitting part, realizing locking and unlocking of the door and the case, and at the same time, the second fitting part. 2. The refrigerator, wherein the fitting portion rotates the rod and the rotating plate coaxially in conjunction with each other, thereby moving the pressure release member and realizing opening and closing of the gas filling passage. The door is recessed rearwardly from the front surface thereof and has a receiving cavity for receiving at least a portion of the pressure relief device, the gas filling passage being provided in the cavity wall of the receiving cavity and the storage chamber. 2. The refrigerator according to claim 1, communicating with said receiving cavity. A protruding column having a rotation axis X as a central axis is provided in the housing cavity, and the rotating plate has one end fixed to the rod and the other end rotatably provided to the protruding column. 3. A refrigerator according to claim 2. A torsion spring is provided between the rotating plate and a cavity wall of the housing cavity, and the torsion spring and the pressure release member are positioned on opposite sides of the rotating plate, respectively. Item 2. The refrigerator according to item 2. A fixed passage having a polygonal cross-section for attaching the rod is provided at the end of the rotating plate, and the cross-sectional shape of the rod matches the cross-sectional shape of the fixed passage. 5. The refrigerator according to any one of 4. A decorative cover is connected to the door, the rod is provided between the door and the decorative cover, both ends of the rod pass through the decorative cover, and both sides of the decorative cover are provided with rotating rods. Refrigerator according to any one of claims 1 to 4, characterized in that avoidance holes are provided that coincide with the trajectory of movement. 2. The refrigerator according to claim 1, wherein a region near the lower end surface of said door is recessed rearward from the front surface thereof to form a housing space for housing said handle. 8. The refrigerator according to claim 7, wherein a lower end of said housing space extends to a lower end surface of said door, and both left and right ends thereof extend to side end surfaces of said door. When the door and the case are locked, the handle is positioned within the housing space, and the front surface of the handle and the front surface of the door above the housing space are flush with each other. The refrigerator according to claim 8, characterized by: the first fitting portion includes a lock portion having a vertically downward lock wall and an inclined guide wall;
The second fitting part includes a lock plate rotatable about the rotation axis X, the axis of the rotation axis X is arranged horizontally, and has a predetermined distance from the handle. A protruding block is provided on the side facing the side wall of the case, and when the locking plate rotates around the rotation axis X under the driving of the handle, the protruding block moves along the guide wall to the locking wall. to achieve locking between the door and the case, wherein the protruding block and the handle are located on both sides of the rotating shaft, respectively. Refrigerator as described. a refrigerator,
a housing defining an insulated reservoir;
a low-pressure storage unit contained within the storage chamber, the interior of which can be evacuated to create a pressure below atmospheric pressure outside the enclosure;
The low pressure storage unit comprises:
A case defining a storage compartment having an access opening for loading and unloading articles, the case comprising an upper case and a lower case forming the storage compartment in a sealed connection, the lower case having a front end wall in which the access opening is formed. a case comprising
a door for opening and closing the loading/unloading port;
first fitting portions provided at opposite ends of the lower case adjacent to the front end wall;
second fitting portions provided at both ends of the door so as to be rotatable about a rotation axis X and fitting with the first fitting portions on the corresponding sides to achieve locking and unlocking of the door; ,
a handle positioned on the front side of the door, the end of which is fixedly connected to the second fitting portion on the corresponding side;
The second fitting portion rotates under the driving of the handle, thereby fitting with the first fitting portion, thereby realizing locking and unlocking of the door and the case. refrigerator. The lower case includes a bottom wall, and the edge of the bottom wall is provided with a first lower wall, a lower rear wall, a second lower wall, and a front end wall, which are sequentially connected,
The upper case includes a ceiling wall, an upper rear wall, a first upper wall, and a second upper wall which are connected in sequence and provided at the edge of the ceiling wall,
11. The upper rear wall is mated with the lower rear wall, the first lower wall is mated with the first upper wall, and the second lower wall is mated with the second upper wall. Refrigerator as described. The distance between the lower wall surface of the first upper wall and the second upper wall of the upper case and the ceiling wall linearly decreases from the rear to the front, and decreases to 0 at the front edge of the ceiling wall. 13. The refrigerator as claimed in claim 12, wherein the front end of the top wall is hermetically connected to the front end wall of the lower case. The refrigerator according to any one of claims 11 to 13, wherein reinforcing ribs are provided on the outside of the box wall of the case. 15. The refrigerator according to claim 14, wherein the reinforcing ribs are distributed in a grid pattern. The case includes a first enclosure parallel to the bottom wall of the case, and a first enclosure connected to the rear end of one end away from the opening of the first enclosure and extending forward and downward to the foremost end of the case. The first enclosing plate and the second enclosing plate are connected to form a lock accommodating portion, and the lock accommodating portion is formed with a passage opening on the front end side of the case. 15. Refrigerator according to claim 14. 17. The refrigerator according to claim 16, wherein the first fitting portion is provided inside the lock accommodating portion and fixed to the first enclosure plate. 17. The end face of the first and second surrounding plates remote from the box wall of the case and the end face of the reinforcing rib remote from the box wall of the case form a common end face. Refrigerator as described. 19. The refrigerator according to claim 18, wherein an end surface of said first fitting portion remote from the box wall of said case and an end surface of said reinforcing rib remote from said case wall are formed as a common end surface. The refrigerator according to any one of claims 11 to 13, wherein said upper case and said lower case are fixed by ultrasonic welding.

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