JP7408800B2 - refrigerator - Google Patents

Description

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

[Related applications]
This disclosure is based on a Chinese patent application whose application number is 201922234935.7 filed on December 12, 2019, and whose title is "refrigerator", and whose application number is 201911330651.6, which was filed on December 20, 2019. , a Chinese patent application whose invention title is "refrigerator", a Chinese patent application whose application number is 201922316459.3 filed on December 20, 2019, a Chinese patent application whose invention title is "refrigerator", and December 20, 2019. The invention claims priority based on the Chinese patent application filed on 201922307498.7, the title of the invention being "refrigerator", the entire content of which is incorporated into the present application by reference.

Refrigerators occupy an important share of the market as electrical products essential to home life. With the increasing demand of consumers for the quality of fresh food, the demands on refrigerators are also increasing, and refrigerators are required to have higher layout and more powerful functions. In particular, it is desirable for stored fresh foods to have a longer shelf life, thereby ensuring the freshness of the foodstuffs and preventing loss of nutritional components.

In order to better preserve food, a vacuum chamber is currently provided in a refrigerator, and this vacuum chamber is evacuated using a vacuum exhaust device. The main effect of evacuation is to remove oxygen within the vacuum chamber so as to prevent food from spoiling. However, in order to guarantee a vacuum state, it is necessary to tightly seal the vacuum chamber, and the sealing mechanism must be able to easily achieve sealing and open easily. It is difficult to open the door because the air pressure inside is lower than the outside air pressure.

Embodiments of the present disclosure provide a refrigerator, the refrigerator comprising:
an enclosure defining an insulated storage room;
a low-pressure storage unit housed in the storage chamber, the inside of which can be evacuated to form a pressure lower than the atmospheric pressure outside the housing;
The low pressure storage unit includes:
A case defining a storage room having an inlet/outlet for loading and unloading articles;
a door for opening and closing the entrance/exit;
a first fitting part provided at opposite ends of the case;
a second fitting part that is rotatably provided at both ends of the door and that fits with the first fitting part on the corresponding side to realize locking and unlocking of the door;
a handle located on the front side of the door, the end of which is fixedly connected to the second fitting part on the corresponding side;
a gas filling passage provided in the door and 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 that interlocks with the second fitting part, and both ends of the rod are fixed to the second fitting part on corresponding sides, and the rotation axis of the second fitting part is fixed to the second fitting part. with a rod parallel to
a rotating plate whose one end is fixedly connected to the rod, the other end is rotatably connected to the door, and whose rotational axis coincides with the rotational axis of the second fitting part;
a pressure release member fixed to the rotary plate and for opening and closing the gas filling passage;
The second fitting part rotates around a rotation axis under the drive of the handle, thereby fitting with the first fitting part to realize locking and unlocking of the door and the case. At the same time, the second fitting part causes the rod and the rotary plate to coaxially rotate in conjunction with each other, thereby moving the pressure release member and opening and closing 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 diagram 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. 3 is a perspective view from another angle of a refrigerator case according to some embodiments of the present disclosure. 1 is an exploded schematic diagram of a refrigerator door according to some embodiments of the present disclosure; FIG. FIG. 3 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 when the refrigerator door and case are in a closed but unlocked position according to some embodiments of the present disclosure; FIG. 2 is a schematic partial cross-sectional view of another position of a 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. FIG. 3 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; 1 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. FIG. 3 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 an air extraction device, a low-pressure storage unit, and a drain pipe of a refrigerator according to some embodiments of the present disclosure; 3 is a diagram showing the relative position structure of the air extraction device, the low pressure storage unit, and the drain pipe of the refrigerator according to some embodiments of the present disclosure from another angle; FIG. 3 is a schematic structural diagram of the 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 refrigerator air extraction device according to some embodiments of the present disclosure; FIG. FIG. 3 is a schematic structural diagram of an elastic body of a refrigerator according to some embodiments of the present disclosure. 1 is an exploded schematic diagram of a refrigerator bleed device according to some embodiments of the present disclosure; FIG. 1 is a cross-sectional view of a refrigerator bleed device 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. 20 is an enlarged schematic structural diagram of area A in FIG. 19. FIG. FIG. 3 is a schematic structural diagram of the relative positions of an inner liner and a case of a refrigerator according to some embodiments of the present disclosure. 22 is an enlarged schematic structural diagram of region B in FIG. 21. FIG. FIG. 2 is a cross-sectional view of the refrigerating compartment of the refrigerator of the present disclosure. 24 is an enlarged schematic structural diagram of area C in FIG. 23. FIG. 1 is a perspective view of a cold storage compartment of a refrigerator according to some embodiments of the present disclosure; FIG. 26 is an enlarged schematic structural diagram of region D in FIG. 25. FIG. FIG. 3 is an exploded perspective view of a pressure detection unit of a low-pressure storage unit of a refrigerator according to some embodiments of the present disclosure. 28 is an enlarged schematic structural diagram of area E in FIG. 27. FIG. 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 will further explain the present disclosure in combination with specific examples so that those skilled in the art can better understand and implement the present disclosure, but the scope of protection of the present disclosure is The invention is not limited to the scope described in the detailed description. Note that the embodiments of the present disclosure and the features in the embodiments can be arbitrarily combined with each other as long as they do not contradict each other.

Note that all direction indications (up, down, left, right, front, back, etc.) in the embodiments of the present disclosure refer to the relative positional relationships and movements between each component in a certain posture (as shown in the drawings). This is merely for explaining the situation, etc., and when the specific posture changes, the direction instruction also changes accordingly.

In addition, references to the present disclosure such as "first", "second", etc. are used for illustrative purposes only and indicate or imply relative importance or implicitly indicate the number of technical features indicated. should not be understood as indicating. Therefore, the features defined by "first" and "second" may explicitly or implicitly include at least one of the features.

Furthermore, the technical solutions between the embodiments may be combined with each other, but must be based on what can be realized by a person skilled in the art, and if the combination of technical solutions is inconsistent with each other or cannot be realized, such technical solutions We believe that the combination does not exist and does not fall within the protection scope of 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 to 11, the refrigerator 1 includes a heat-insulated housing 2 including a case 2a, an inner liner 2b, and a heat-insulating layer (not shown) located between the two. The housing 2 defines a plurality of insulated storage compartments for storing articles such as food products. In this embodiment, these storage compartments are a refrigerating compartment 12 located at the top and a freezing compartment located at the bottom, respectively. 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 opening, and the freezing compartment is provided with a freezing double-opening door.

Note that the present disclosure is not limited to the specific distribution form of the storage compartments of the refrigerator 1, and is applicable to other forms of the refrigerator 1, such as a refrigerator 1 having a pull-out door, 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). Such refrigeration systems are well known in the prior art and further explanation is omitted. Of course, the refrigerator 1 can also use other types 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 that can be maintained in a low-pressure state and an extraction device for extracting gas from the low-pressure storage unit 15. The bleed device 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 that controls an air extraction device to perform vacuum evacuation of the low pressure storage unit 15 in order to realize automatic control of 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 another storage compartment, such as a variable temperature room whose temperature range can be switched between a refrigerated temperature range and a frozen temperature range. .

The low pressure storage unit 15 is located at the bottom of the refrigerator compartment 12 and is supported by the bottom wall of the refrigerator compartment 12 . A freshness preserving container 44 which has high humidity and is suitable for preserving foods such as vegetables may be provided adjacent to the low pressure storage unit 15 . It is installed in parallel.

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 total width of the low pressure storage unit 15 and the width of the freshness preservation container 44 is 12, thereby effectively distributing the bottom space of the cold storage compartment 12, so that the freshness preservation container 44 and the low pressure storage unit 15 can both be inserted into the cold storage compartment 12 and withdrawn from the cold storage compartment 12. It is possible.

The low pressure storage unit 15 includes a case 4 fixed within the refrigerator compartment 12 and a door 5 connected to the case 4 and capable of being pushed into or pulled out from the refrigerator compartment 12 .

As shown in FIGS. 2 to 4, the case 4 has a box-like structure and defines a flat low-pressure storage chamber 14 having a food inlet/outlet 14a. In this embodiment, the access port 14a is located at the front end of the case 4 facing the user.

A lattice-shaped reinforcing rib 40 is provided on the outside of the box wall of the case 4, thereby improving the strength of the box wall of the case 4 and preventing 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 to each other 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 that are sequentially connected to each other and provided at the edge of the bottom wall 42a, and It includes a front end wall 42e located at the front end and forming the access port 14a, where the bottom wall 42a of the lower case is the bottom wall of the low pressure storage unit 15. In this embodiment, the front end wall 42e has a flat abutting surface 43 that is substantially perpendicular to the horizontal plane and used for abutting against the door 5.

As shown in FIGS. 3 and 4, the upper case 41 includes a ceiling wall 41a, an upper rear wall 41b, a first upper wall 41c, and a second upper wall 41d that are connected in sequence and provided at the edge of the ceiling wall 41a. The distance between the lower wall surface of the first upper wall 41c and the second upper wall 41d of the upper case 41 and the ceiling wall 41a decreases linearly from the rear to the front, and at the front edge of the ceiling wall 41a, decreases 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 triangular.

Here, the upper rear wall 41b and the lower rear wall 42b are combined, the first lower wall 42c and the first upper wall 41c are combined, the second lower wall 42d and the second upper wall 41d are combined, and the top The front end of the wall 41a and the front end wall 42e of the lower case 42 are aligned, and the abutted position is welded and fixed by ultrasonic welding, whereby the upper case 41 and the lower case 42 are fixedly connected, and the low pressure storage chamber 14 is formed. The above ultrasonic welding effectively improves the connection strength between the upper case 41 and the lower case 42 and ensures the airtightness of the entire case 4. Furthermore, the fact that the entrance 14a for the case 4 is formed in the front end wall 42e of the lower case 42 provides integrity to the entrance 14a for the case 4, and effectively ensures airtightness of the case 4. Furthermore, the distance between the lower wall surface of the first upper wall 41c and the second upper wall 41d and the ceiling wall 41a decreases linearly from the rear toward the front, and further decreases to 0 at the front edge of the ceiling wall 41a. This arrangement reduces the number of abutting surfaces where the upper case 41 and the lower case 42 are brought together, and improves the airtightness of the case 4 as a whole, especially the airtightness at the entrance 14a of the case 4. On the other hand, by providing the case 4 as a separate structure having an upper case 41 and a lower case 42, processing of the lattice-shaped reinforcing ribs 40 becomes convenient.

As shown in FIG. 6, the door 5 can be provided with an annular sealing element 16, so 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 the joint between the door 5 and the low-pressure storage chamber 14. The sealing element 16 may be provided at the front end of the case 4, for example connected to the front end wall 42e.

When the low pressure storage chamber 14 is closed by the door 5 and the extraction device is activated, the gas located in the low pressure storage chamber 14 is extracted and the low pressure storage chamber 14 is in a low pressure state. According to a preferred embodiment of the present disclosure, at the end of the evacuation process, the pressure within the low pressure reservoir 14 is between standard atmospheric pressure and absolute vacuum. Because the pressure within the low-pressure storage chamber 14 is lower than standard atmospheric pressure, those skilled in the art also refer to it colloquially as a "vacuum chamber."

As shown in FIG. 2, the door 5 is a pull-out type door, and the door 5 can be pushed into the case 4 to close the entrance 14a of the low pressure storage chamber 14, or pulled out from 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. A user moves the storage container 54 into and out of the low pressure storage chamber 14 to retrieve and store items within the low pressure storage unit 15 . The door 5, together with the storage container 54, constitutes a drawer unit that can be taken in and out of the case 4.

An extendable guide rail unit 17 may be provided between the storage container 54 and the case 4. Thereby, the door 5 and storage container 54 can be smoothly pulled out from 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 is rotatably provided at both ends of the door 5 around the rotation axis X and the first fitting part 6 provided in the case 4, and The second fitting part 7 is fitted with the first fitting part 6 to realize locking and unlocking of the door 5. Due to the coupling between the second fitting part 7 and the first fitting part 6, the door 5 is locked in the closed position, and the sealing element 16 between the case 4 and the door 5 is sufficiently pressed by the locking force of the locking mechanism. The airtightness between the door 5 and the case 4 is improved.

A lock accommodating portion 61 and a first fitting portion 6 located within the lock accommodating portion 61 are both provided on the first lower wall 42c and the second lower wall 42d at locations near the loading/unloading port 14a of the case 4. , as shown in FIG. 7, 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 that extends to the rear end of one end remote from the inlet/outlet 14a of the first enclosure plate 60a. A second surrounding plate 60b that extends forward and downward to the frontmost end of the case 4 is provided. The first surrounding plate 60a and the second surrounding plate 60b are connected to form a lock housing portion 61. The lock housing portion 61 has a passage hole 64 formed at the front end of the case 4 for inserting or pulling out the second fitting portion 7 . In this embodiment, the end surfaces of the first surrounding plate 60a and the second surrounding plate 60b that are away from the box wall of the case 4, and the end surfaces of the reinforcing ribs 40 that are away from the box wall of the case 4 are common end surfaces. 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 set as a common end face reduces the occupied space of the low pressure storage unit 15. Space can be fully utilized without increasing the size.

The first fitting part 6 includes a locking part 62, and the locking part 62 is fixed to the first surrounding plate 60a in the lock housing part 61, and the locking part 62 has a locking wall 62a perpendicular to the first surrounding plate 60a. and an inclined guide wall 62b, one end of which is connected to the end of the lock wall 62a remote from the first enclosure plate 60a, and the other end of which is close to the entrance/exit 14a of the first enclosure plate 60a. Connected to the end.

As shown in FIG. 6, the upper part of the lock accommodating part 61 on at least one side of the case 4 is electrically connected to an air extraction device, and is fitted with the second fitting part 7 to lock and unlock the door 5. A position detection 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 has a trigger part, and the limit push rod 63a has a trigger part. One end is fitted with the trigger part, the other end is fitted with the second fitting part 7, and when the second fitting part 7 slides along the lock wall 62a, the limit push rod 63a is pushed and moved, This triggers the limit switch 63. As shown in FIG. 7, the first surrounding plate 60a is provided with an opening 65 located on both sides of the guide wall 62b and the lock wall 62a, and the opening 65 is 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 located near the lock wall 62a.

As shown in FIGS. 2 and 5 to 11, a decorative cover 8 is connected to the door 5. A connecting member 83 is provided at two opposing ends of the door 5, and the second fitting portion 7 is rotatably provided on the connecting member 83. The second fitting part 7 rotates around its rotation axis X, and rotates in conjunction with a handle 81 fixed thereto.

One second fitting portion 7 is fixed to each end of the handle 81. In this embodiment, the second fitting part 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 that it cannot move relative to the handle 81. When the handle 81 rotates, the second fitting part 7 also rotates around the rotation axis X.

As shown in FIGS. 5 and 10, in some embodiments of the present disclosure, the second fitting part 7 includes a lock plate that is rotatable around the rotation axis X, and the axis of the rotation axis X is horizontal. 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 around the rotation axis X under the drive of the handle 81, the protruding block 72 moves along the guide wall 62b. The lock wall 62a is slid to the rear side of the lock wall 62a, and the door 5 and the case 4 are locked.

As shown in FIG. 5, 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 successively connected. The connection point extends to form a fourth slat 71d that is located on the same side of the first slat 71a and the third slat 71c and forms an acute angle with the first slat 71a.

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

A gas filling passage 18 (as shown in FIG. 5) for communicating both 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 relief device includes a rod 20 interlocking with the second fitting part 7, a rotary plate 59 fixedly connected to the rod 20, and a pressure relief member 19 fixed to the rotary plate 59 for opening and closing the gas filling passage 18. include. Among them, both ends of the rod 20 are fixed to corresponding lock plates, the rod 20 and the protruding block 72 are respectively located on both sides of the rotation axis X, and the rotation axis of the rotation plate 59 is the second fitting part. When the second fitting part 7 rotates around the rotation axis X under the drive of the handle 81, the rod 20 and the rotation plate 59 are rotated coaxially in conjunction with each other, and the pressure release member 19 is rotated. Close the gas filling passage 18. Therein, both ends of the rod 20 pass through the decorative cover 8, and the first slats 71a of the second fitting part 7 are fixed to the corresponding ends of the rod 20 so as not to be relatively movable. Avoidance holes 39 are provided on both sides of the decorative cover 8 to match 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 an accommodation cavity 52 recessed rearward from its front surface 5a for accommodating at least a portion of the pressure relief device. The gas filling passage 18 is provided in the cavity wall of the accommodation cavity 52 remote from the decorative cover 8, and communicates the low pressure storage chamber 14 with the accommodation cavity 52. A protruding column 53 is provided, a rotary plate 59 has one end fixed to the rod 20 and the other end rotatably fixed in the housing cavity 52 around the protruding column 53, and the pressure release member 19 is attached to the rotary plate 59. A torsion spring is provided on the inside and on the outside of the rotary plate 59. When the door 5 and the case 4 are locked, the first fitting part 6 and the second fitting part 7 are locked, the torsion spring presses the rotating plate 59, and the pressure release member 19 is closed to the gas filling passage. 18 to tighten it. 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 down inwardly and downwardly, and the rotary plate 59 The two fitting parts 7 and the handle 81 are interlocked and rotated inwardly and downwardly, so that when the user closes the door, the user 's acting force can be reduced and the closing operation can be simplified, and the torsion The spring can limit the limit position for 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 5a of the door 5, the user's hand It is possible to prevent the door from being caught between the door and the door 5.

According to some embodiments of the present disclosure, the end of the rotary plate 59 is provided with a fixed passage having a polygonal cross-section for attaching the rod 20, and the cross-sectional shape of the rod 20 is the same as the cross-sectional shape of the fixed passage. In agreement, the installation of a polygonal cross-section makes it impossible to generate a relative rotational movement between the rod 20 and the rotary plate 59.

As shown in FIGS. 6 to 8, the door 5 is in the closed position but not yet locked, and at this time the handle 81 is in the first position. When the user presses the handle 81 downward and backward, the handle 81 rotates inward around the rotation axis The protruding block 72 of the second fitting part 7 gradually approaches the side away from the inlet/outlet 14a of the locking part 62, and at the same time, the protruding block 72 of the second fitting part 7 gradually approaches the limit push rod 63a of the limit switch 63. approach. The rod 20 interlocks with the rotary plate 59 to rotate inward, and the rotary plate 59 interlocks with the pressure relief member 19 to gradually approach the gas filling passage 18 .

As shown in FIGS. 9 and 10, the door 5 and the case 4 are in a locked state, and at this time, the handle 81 is in the second position. When the handle 81 rotates to the second position, the second fitting part 7 rotates into the lock housing part 61, and the protruding block 72 on the second fitting part 7 is moved to a position adjacent to the rear side of the lock wall 62a. and then push the limit push rod 63a to move it upwards, triggering the limit switch 63, which sends a control signal that the door is closed to the control unit, and the control unit responds to the control signal. control the air extraction device and start air extraction. At this time, the pressure release member 19 comes into close contact with the gas filling passage 18 so as to close the gas filling passage 18, and the low pressure storage chamber 14 becomes a sealed space. The installation of the limit switch 63 that is electrically connected to the first fitting part 6, the second fitting part 7, and the air extraction device allows the locked state of the door 5 and the case 4 to be immediately monitored and measured. When the door 5 and the case 4 are locked, a vacuum evacuation signal is immediately sent to the extraction device to ensure the degree of vacuum in the low-pressure storage unit 15 and to maintain 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 to close. To close the door, the user can lift the handle 81 upwards and push it toward the case 4, and when the door 5 is in the closed position but not yet locked, the user can lift the handle 81 downwards and backwards. When pressed, 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 close the gas filling passage 18. As another form of closing the door, the user can press the decorative cover 8 directly. In conjunction with the decorative cover 8, the second fitting part 7 moves in parallel to the lock housing part 61, and the protruding block 72 on the second fitting part 7 contacts the guide wall 62b of the lock part 62, Under the action of the horizontal pushing force and the guide wall 62b, the protruding block 72 moves downward along the guide wall 62b, and rotates the second fitting part 7 downward around the rotation axis X in conjunction with the second fitting part 7. , the protruding block 72 moves downward and gradually approaches 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 is brought into close contact with the gas filling passage 18 so as to close the gas filling passage 18. In the present disclosure, the door closing 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, is convenient and comfortable, reduces the effort of the user to place 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 in a locked state and the user wants to open the door 5, the user holds the lower end of the handle 81 and lifts it upward and outward, and the handle 81 rotates around 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, and the rotating plate 59 is interlocked to rotate upward about the rotation axis It enters the low pressure storage chamber 14 through the passageway 18 to balance the internal and external pressures. Thereafter, the user can open the door 5 by holding the handle 81 and pulling it toward the user.

The second fitting part 7 and the first fitting part 6 described above can be locked without increasing the occupied space of the low pressure storage unit 15, and have a compact structure and stable fitting.

The mating of the second mating part 7 and the first mating part 6 in the locking position provides a locking force between the door 5 and the case 4 and sufficiently deforms the sealing element 16, thereby The airtightness between the case 5 and the case 4 is improved.

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 condition of the low pressure storage chamber 14 . Note that in other embodiments, the gas filling passage 18 and the pressure release member 19 may be provided independently from the handle 81. For example, the door 5 is provided with a button, and 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 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 the handle 81. In this embodiment, the lower end of the accommodation space 82 is extends to the lower end surface 5b of the door 5, and both left and right ends extend to the side end surface 5c of the door 5. When the door 5 is in the locked state, the handle 81 is located in the accommodation space 82, and the front surface of the handle 81 is flush with the front surface 5a of the door 5 located at the upper part of the accommodation space 82. The volume occupied by the low pressure storage unit 15 is reduced. Particularly preferably, the handle 81 in the second position is completely accommodated within the receiving space 82 of the door 5 and does not extend beyond the front surface of the door 5 . When the door 5 is in the closed position but not yet locked, the handle 81 is in the first position, the handle 81 comes out of the accommodation space 82 and is located on the front side of the front surface 5a of the door 5. The state in which 81 is in the first position occurs when the user opens the low-pressure storage unit 15, and at this time, the door of the refrigerator 1 is open, and the internal space of the refrigerator 1 occupied by the low-pressure storage unit 15 is not affected. do not have.

When the door of the refrigerator 1 is in the closed state, 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 may be damaged when closing the door. A certain distance is maintained between the inside of the door and the handle 81 to avoid this. Therefore, by providing the handle 81 in the accommodation space 82, the distance between the low-pressure storage unit 15 and the inside of the door of the refrigerator 1 can be reduced, and the space utilization rate of the refrigerator 1 can be improved. .

The 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 is located within the door 5 as a whole.

The handle 81 is fixed to the door 5 and then rotatably connected to the door 5. When the handle 81 is rotated, the second fitting part 7 rotates, and both the rod 20 and the rotary plate 59 rotate around the rotation axis X.

The handle 81 is rotatable about the rotation axis X between a first position and a second position. In the first position, the included angle formed between the handle 81 and the wall surface of the accommodation space 82 of the door 5 near the case 4 is maximum, and the angle between the lower end and the wall surface of the accommodation space 82 of the door 5 near the case 4 is the maximum. Since the maximum distance is formed, the first position can also be called an extended position. In the second position, the included angle formed between the handle 81 and the wall surface of the housing space 82 of the door 5 close to the case 4 is minimum, and the distance between its lower end and the wall surface of the housing space 82 close to the case 4 is the minimum. is formed, so the second position can also be called a return position. Correspondingly, the second fitting part 7 interlocked with the handle 81 and the rod 20 interlocked with the second fitting part 7 are also restricted to rotate between the first limit position and the second limit position. , Here, when the handle 81 is in the first position, the second fitting part 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 part 7 and the rod 20 are in the second limit position (the state shown in FIG. 9).

12 to 14 are schematic structural diagrams of the exhaust installation of a low-pressure storage unit of a refrigerator. As shown in FIGS. 12 to 14, the refrigerator 1 has a drain pipe 21 for discharging condensed water inside the refrigerator 1. The air extraction device communicates with the low pressure storage unit 15 at one end and with the drain pipe 21 of the refrigerator 1 at the other end. The air extraction device is activated to extract the air in the low pressure storage unit 15 and transport it to the drain pipe 21 and finally discharged from the refrigerator 1 by the drain pipe 21. This prevents the gas extracted from the low-pressure storage unit 15 from directly entering the refrigerator 1 and causing the smells of foods in other areas of the refrigerator compartment 12 to be transferred to each other, thereby affecting the freshness retention effect of the foods. do.

The extraction device 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 pipe 21 . The vacuum pump 22 is installed in the inner liner 2b of the refrigerator compartment 12 and close to the bottom of the low pressure storage unit 15.

A bleed port connected to the first pipe line 23 is provided at a position close to the rear end of the top of the low pressure storage unit 15, and an exhaust port connected to the second pipe line 24 is provided in the drain pipe 21. .

The vacuum pump 22 has a pump, an air bleed pipe 22 a that communicates with the first pipe line 23 , and an exhaust pipe 22 b that communicates with the second pipe line 24 . The bleed pipe 22a of the vacuum pump 22 is arranged in parallel with 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. It turns and extends along the top edge of the rear end of the low-pressure storage unit 15, and then turns 90 degrees toward the rear wall of the inner liner 2b at the first turning position A1, and extends along the top wall 41a of the low-pressure storage unit 15. It extends to the second turning position B1 while maintaining parallel to the second turning position B1, turns 90 degrees again at the second turning position B1, extends downward until it reaches the third turning position C1, turns again at the third turning position C1, and draws. In a plane that communicates 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 in this plane and the projection of the third turning position C1 in this plane are both is also located on the extension of the projection of the bleed pipe 22a on the plane. Moreover, 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. Among them, the projection of the second turning position B1 overlaps with the projection of the third turning position C1. The second pipe line 24 communicates with the exhaust pipe 22b of the vacuum pump 22, passes through the inner liner 2b, and communicates with the exhaust port on the drain pipe 21. Due to the above-mentioned multiple turning installations of the first conduit 23, the route of the conduit is aligned and the space occupied in the direction perpendicular to the rear wall of the inner liner 2b of the conduit is reduced, thereby making it possible to reduce the space occupied by the low pressure storage unit 15. increase the available space.

Note that the present disclosure should not be limited to the diversion configuration of the bleed pipe 22a described above, and the present disclosure may also apply other diversion configurations to reduce the space occupied by the conduit.

15 to 18 are schematic structural diagrams of an air extraction device of a refrigerator. As shown in FIGS. 15 to 18, the air extraction device includes a pump case 27 and an elastic body 28 fitted between the pump and the pump case 27. The pump case 27 is provided with a connecting plate 27a fixed to the rear wall of the inner liner 2b. In this embodiment, the connecting plate 27a is provided with a screw hole, and the connecting plate 27a is provided with a screw hole to connect the pump case 27 and 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 main body 74 to which the vacuum pump 22 is attached, and the main body 74 is provided with a mounting cavity 74a that matches the shape of the vacuum pump 22. 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 brought into close contact with the vacuum pump 22, and vibrations of the vacuum pump 22 are immediately absorbed.

A positioning block 22c is provided at one end of the vacuum pump 22 opposite to the side where the bleed pipe 22a and the exhaust pipe 22b are provided, and the bleed pipe 22a and the exhaust pipe 22b are provided at one end of the mounting cavity 74a of the main body portion 74. An end cover 76 is provided at the other end to fit into the end of the vacuum pump 22, and the end cover 76 is provided with a positioning hole 76a to fit into the positioning block 22c. This protects the end of the vacuum pump 22.

A plurality of protrusions 77 are provided on the outer periphery of the main body 74 so as to be arranged in parallel along the central axis of the main body 74 and surround the main body 74 . The outer diameter of the main body 74 of the elastic body 28 is smaller than the inner diameter of the pump case 27, and the outer diameter of the protrusion 77 of the elastic body 28 is larger than the inner diameter 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, and an air cavity is formed between the plurality of protrusions 77, so that the elastic body 28 Improves the vibration and noise reduction effect of

The protrusion 77 is provided with a notch 77a, and the positions of the notches 77a in the plurality of protrusions 77 correspond, and the notch 77a reserves a space for deformation of the elastic body 28 in advance, and Ensures deformation ability and improves vibration noise reduction effect. In this embodiment, the cutout 77a is semicircular. The plurality of notches 77a are uniformly distributed on the protrusion 77. Note that the present disclosure is not limited to the shape and number of the notches 77a described above, and other shapes of the notches 77a may be applied. For example, in the present disclosure, one protrusion 77 may be provided with four arcuate notches 77a.

The pump case 27 includes a first case 27b and a second case 27c, and the first case 27b and the second case 27c are locked and attached to the outside of the elastic body 28. As described above, the pump case 27 is provided separately and is convenient to attach and detach.

19 to 22 are schematic diagrams of a fixing mechanism for a low-pressure storage unit of a refrigerator. As shown in FIGS. 19 to 22, the refrigerator 1 includes a plurality of fixing 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 refrigerator compartment 12. The low pressure storage unit 15 is fixed to the refrigerator compartment 12 by coupling the fixing part 3 and the second fixing part 11 .

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 connected in sequence, and here, 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, and separating from the second side plate 32. A guide passage opening 36a is formed at one 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 remote from the bottom wall 42 a of the case 4 , and the first bottom plate 34 connects the second side plate 32 and the third side plate 33 . A position regulation passage 35 is formed in the , the position regulation passage 35 extends in a direction away from the second side plate 32 , and a position regulation passage opening is formed at the end of the first bottom plate 34 remote from the second side plate 32 . 35a is formed, that is, the guide passage opening 36a and the position regulating passage opening 35a are aligned in direction. Here, the position restriction passage 35 may be set to gradually expand in the direction from the second side plate 32 toward the position restriction passage port 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 same orientation of the guide passage opening 36a. In this embodiment, four first fixing parts 3 are provided in two sets and two rows. The guide passage opening 36a of the guide passage 36 is located toward the rear side of the case 4 or on one side away from the freshness preservation container 44, thereby reducing the 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, and the installation space for installing the low-pressure storage unit 15 is avoided in advance, thereby reducing the occupied space of the low-pressure storage unit 15.

As shown in FIG. 22, the second fixing part 11 includes a second bottom plate 11a fixed to the bottom wall of the inner liner 2b, a fixing hook 11b that fits into the fixing hole 32a, and a combination of the second bottom plate 11a and the fixing hook 11b. It has a fixed pillar 11c that connects. The fixing column 11c is installed in the guide passage 36 and the position regulating passage 35, and the fixing hook 11b is located between the first bottom plate 34 and the bottom wall 42a of the case 4, and is installed in the fixing hole 32a. The fixing column 11 c engages with the second side plate 32 , and at this time, the fixing column 11 c comes into contact with the end of the position regulating passage 35 near the second side plate 32 . This improves installation stability. The plurality of second fixing parts 11 are distributed on the bottom wall of the inner liner 2b while maintaining the same orientation. In this embodiment, a recess 30 for fixing the second bottom plate 11a is provided on the bottom wall of the inner liner 2b, thereby fixing the second fixing part 11 and heightening the space occupied by the second fixing part 11. reduce

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, and the fixing column 11c corresponds to the position regulating passage opening 35a. Then, push the low pressure storage unit 15 and fix the first side plate 31 of the first fixing part 3 to the second fixation 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. 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 path 10 that communicates with the main air path and is provided adjacent to the low pressure storage unit 15. It extends forward along the top of the unit 15, thereby guiding the cold air to the front end of the low pressure storage unit 15, and at the same time around the first air passage 10 when the cold air flows through the first air passage 10. Cool the area.

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

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

The second outlet 10b guides the low temperature air to the top of the low pressure storage unit 15 and diffuses it around the second outlet 10b at the top of the low pressure storage unit 15, thereby causing the low temperature air to flow into the low pressure storage unit 15. cover. In the direction from the first air path 10 to the top of the low-pressure storage unit 15, the second air outlet 10b may be provided to gradually expand, thereby reducing the wind speed and directing low-temperature air to the first air path 10. The low pressure storage unit 15 is covered by being diffused around the gap between the low pressure storage unit 15 and the low pressure storage unit 15 .

The distance between the leading edge of the first air passage 10 and the leading edge of the low-pressure storage unit 15 is written as L1, and the length of the low-pressure storage unit 15 in the front-rear direction is written as L2, where L1:L2∈[ 0.2, 0.8]. The above installation can effectively diffuse the low-temperature air and form a low-temperature environment around the low-pressure storage unit 15, thereby reducing the temperature inside the low-pressure storage unit 15.

In this way, the first air passage 10 introduces low-temperature air around the low-pressure storage unit 15 to surround the low-pressure storage unit 15, maintain a low-temperature environment that is lower in temperature than other parts of the refrigerator compartment 12, and maintain a low-pressure The refrigeration 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 path, and the first air path 10 is fixed to the communication port. Note 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 not limited to the installation position of the first air passage 10 or the configuration of the first air passage 10. A first air passage 10 that guides low-temperature air to the front end of the low-pressure storage unit 15 may be applied adjacent to the position, for example, a first air passage 10 provided at a position such as a side surface of the low-pressure storage unit 15 may be applied. You may do so.

27 to 29 are schematic configuration diagrams of a pressure detection unit of a low pressure storage unit of a refrigerator. As shown in FIGS. 27 to 29, the refrigerator 1 is installed at the back of the low pressure storage unit 15 to monitor and measure the internal pressure of the low pressure storage unit 15, and has an air extraction device. The pressure detection unit 9 is electrically connected to the pressure detection unit 9. When the internal pressure of the low-pressure storage unit 15 becomes higher than a preset value and loses its vacuum refrigeration effect, the pressure detection unit 9 sends a vacuum evacuation signal to the air extraction device, which operates to open the “vacuum chamber”. Form. This ensures that when the low pressure storage unit 15 is not open for a long time, the bleed device will operate in a timely manner to reduce the pressure when the pressure increases due to long-term air leakage and reaches a preset value due to unavoidable reasons The degree of vacuum in the storage unit 15 can be ensured, and the effect of keeping food fresh can be ensured.

As shown in FIG. 28, the pressure detection unit 9 has a support 91 that protrudes from the back of the low pressure storage unit 15, and the support 91 has a first through hole 91a that communicates with the low pressure storage chamber 14 of the low pressure storage unit 15. have A rubber sealing material 92 that seals the end of the pillar 91 and a pressure switch 93 that abuts the rubber sealing material 92 are provided at one end of the pillar 91 remote from the low pressure storage unit 15 . A spring 94 is provided between the rubber seal material 92 and the bottom of the support 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 level, the internal pressure of the first through-hole 91a of the support column 91 rises accordingly, and the floating block 95 is subjected to a certain atmospheric pressure, and the rubber seal resists the tensile force of the spring 94. The rubber sealing 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, and the control unit controls the bleed device to evacuate the low pressure storage unit 15 based on the control signal.

As shown in FIG. 29, in an 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, A floating block 95 is fixed to the other end of 94. A second through hole 91b having a radial dimension larger than the radial dimension of the first through hole 91a is provided at one end of the strut 91 remote from the low pressure storage unit 15. A mounting base 46 is formed on which the rubber sealing material 92 is attached. The floating block 95 is T-shaped and includes a floating plate 95a that contacts the rubber sealing material 92 and has a recessed portion 95c in the center region, and a floating column 95b connected to the spring 94, and has a diameter of the floating plate 95a. The directional dimension is larger than the radial dimension of floating column 95b. The rubber sealing material 92 has a truncated conical shell shape with a pillar 92a provided at the center thereof that fits into a recess 95c on a floating plate 95a. Among them, the dimension of one end of the truncated conical shell-shaped rubber sealing material 92 remote from the mounting base 46 is smaller than the dimension of one end close to the mounting base 46 .

As shown in FIG. 28, a fixing base 47 for attaching the pressure cover 55 is provided on the outer periphery of the support column 91. An annular groove 56 that fits into the support column 91 is provided on one side of the pressure cover 55 , and a fixing plate 57 corresponding to the fixing base 47 is provided on the outer periphery of the groove 56 . The other side of the pressure cover 55 is provided with an accommodation cavity 58 for mounting a pressure switch 93. A third through hole 58a is provided at the bottom of the accommodation cavity 58 so as to bring the rubber sealing material 92 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 accommodation cavity 58. The end of the support column 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 sealing material 92, the fixing plate 57 is fitted into the fixing base 47, Fixed connection with screws.

The pressure detection unit 9 installed as described above is provided integrally 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 a preset value and the vacuum refrigeration effect is lost, a vacuum evacuation signal is sent to the extraction device in a timely manner, thereby reducing the degree of vacuum in the low pressure storage unit 15. and ensure the effect of preserving food freshness.

The above description is only some examples of the present disclosure and does not limit the present disclosure in any other way, and any person skilled in the art will be able to understand the above-disclosed technical content with equivalent implementations of equivalent changes. Any simple amendments made to the above embodiments according to the technical essence of the present disclosure, although the examples may be modified or modified to apply to other areas, without departing from the technical solution content of the present disclosure. , equivalent changes and modifications still fall within the protection scope of the technical solution of the present disclosure.

1 Refrigerator 2 Housing 4 Case 5 Door 6 First fitting part 7 Second fitting part 15 Low pressure storage unit 18 Gas filling passage 81 Handle

Claims (9)

A refrigerator,
an enclosure defining an insulated storage room;
a low-pressure storage unit housed in the storage chamber, the inside of which is evacuated to form a pressure lower than the atmospheric pressure outside the housing;
The low pressure storage unit includes:
A case defining a storage room having an inlet/outlet for loading and unloading articles;
a door for opening and closing the entrance/exit;
a first fitting part provided at opposite ends of the case;
a second fitting part that is rotatably provided at both ends of the door and that fits with the first fitting part on the corresponding side to realize locking and unlocking of the door;
a handle located on the front side of the door, the end of which is fixedly connected to the second fitting part on the corresponding side;
a gas filling passage provided in the door and 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 that interlocks with the second fitting part, wherein both ends of the rod are fixed to the second fitting part on corresponding sides, and are parallel to the rotation axis of the second fitting part. and,
a rotating plate whose one end is fixedly connected to the rod, the other end is rotatably connected to the door, and whose rotational axis coincides with the rotational axis of the second fitting part;
a pressure release member fixed to the rotary 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 to realize locking and unlocking of the door and the case, and at the same time, the second fitting part rotates under the drive of the handle. 2. The fitting part interlocks the rod and the rotary plate to rotate coaxially, thereby moving the pressure release member and opening and closing the gas filling passage ,
A decorative cover is connected to the door, and the rod is provided between the door and the decorative cover, and both ends of the rod pass through the decorative cover, and the rod is provided with a rotating shaft on both sides of the decorative cover. An avoidance hole is provided that matches the trajectory of the movement,
The first fitting part includes a locking part having a vertically downward locking wall and an inclined guide wall,
The refrigerator is characterized in that the second fitting part includes a lock plate, and a protruding block is provided on a side of the lock plate facing the side wall of the case . The door has an accommodation cavity recessed rearward from its front surface for accommodating at least a portion of the pressure relief device, and the gas filling passage is provided in a cavity wall of the accommodation cavity and is connected to the storage chamber. The refrigerator according to claim 1, wherein the refrigerator communicates with the accommodation cavity. A protruding column whose central axis is the rotation axis of the second fitting part is provided in the accommodation cavity, and the rotating plate has one end fixed to the rod and the other end rotatable to the protruding column. The refrigerator according to claim 2, further comprising a refrigerator. The refrigerator according to claim 2, wherein a torsion spring is provided outside the rotary plate, and the torsion spring and the pressure release member are located on opposite sides of the rotary plate, respectively. A fixing passage having a polygonal cross section for attaching the rod is provided at an end of the rotary plate, and a cross-sectional shape of the rod matches a cross-sectional shape of the fixing passage. 4. The refrigerator according to any one of 4. 2. The refrigerator according to claim 1, wherein a region near the lower end surface of the door is recessed rearward from the front surface thereof to form a storage space for accommodating the handle. 7. The refrigerator according to claim 6 , wherein a lower end of the storage space extends to a lower end surface of the door, and both left and right ends extend to side end surfaces of the door. When the door and the case are locked, the handle is located within the accommodation space, and the front surface of the handle and the front surface of the door located above the accommodation space are flush with each other. The refrigerator according to claim 7 , characterized by: The lock plate is rotatable around a rotation axis of the second fitting part, the axis of the rotation axis of the second fitting part is arranged in a horizontal direction, and has a predetermined distance from the handle ,
When the lock plate rotates around the rotation axis of the second fitting part under the drive of the handle, the protruding block slides toward the rear side of the lock wall along the guide wall and engages with the door. The refrigerator according to claim 1, wherein the refrigerator is locked with the case, and the protruding block and the handle are respectively located on both sides of the rotation axis.

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