Refrigerator having dual pressure relief function

Abstract

The application discloses a refrigerator with double pressure relief functions, which relates to a refrigerator comprising a cabinet, a door body and a sealing strip fixed to the door body, the cabinet has a matching surface which is sealed with the sealing strip when the door body is closed; the refrigerator also has an active pressure relief mechanism and a passive pressure relief mechanism installed to the cabinet; in the specific application scenario of the refrigerator, the active pressure relief mechanism can avoid the formation of excessive negative pressure in the refrigerator through active pressure relief, and can also overcome the problem that the constant connection between the inside and outside of the refrigerator leads to serious cold leakage; the passive pressure relief mechanism can completely eliminate the negative pressure formed in the refrigerator when necessary, and cooperation with the active pressure relief mechanism can shorten the time for the user to perform pressure relief operation.

Description

Technical Field

[0001] This invention relates to the field of freezer design, and more particularly to a freezer with dual pressure relief function. Background Technology

[0002] Existing freezers generally exhibit negative pressure, which occurs roughly as follows: When the door is opened, gas exchange occurs between the freezer compartment and the outside, with warm outside air entering the compartment; when the door is closed, the warm air inside gradually cools down due to the cooling effect, reducing the pressure inside and creating a pressure difference between the inside and outside of the freezer. This results in users needing considerable force to open the door.

[0003] Existing technologies have designed several solutions to address this technical problem by relieving pressure and balancing the internal and external pressures of a freezer. A common approach is to create a gas channel connecting the inside and outside of the freezer to achieve pressure balance. However, the gas channels in existing technologies suffer from problems such as cold leakage and lack of user control. Furthermore, the low temperature of the freezer causes frost to form at the gas channel locations, which can lead to blockage over time, thus affecting the pressure balance.

[0004] In view of this, it is necessary to provide an improved technical solution to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. In order to achieve the above-mentioned objective, the present invention provides a freezer with dual pressure relief function, the specific design of which is as follows.

[0006] A freezer with dual pressure relief function includes a cabinet body, a door body, and a sealing strip fixed to the door body. The cabinet body has a mating surface that seals with the sealing strip when the door body is closed. The freezer also has an active pressure relief mechanism and a passive pressure relief mechanism installed on the side wall of the cabinet body.

[0007] The active pressure relief mechanism has a gas passage connecting the inside and outside of the freezer and an automatic opening valve that automatically opens the gas passage when the pressure difference between the inside and outside of the freezer is greater than a set value.

[0008] The passive pressure relief mechanism includes: a triggering unit; a driving block, triggered by the triggering unit and moving along the corresponding sidewall thickness direction after triggering, having a first rack portion; a gear, rotating about a pivot and meshing with the first rack portion; and a top block, movable in a direction perpendicular to the plane of the mating surface, having a second rack portion and meshing with the gear through the second rack portion; wherein, when the triggering unit triggers the driving block to move, the gear rotates to drive the top block to at least partially protrude beyond the mating surface to lift the sealing strip and form an air-permeable gap between the sealing strip and the mating surface.

[0009] Furthermore, the automatic control valve has a pressure regulating chamber, an air inlet port for supplying air into the pressure regulating chamber, and an air outlet port for supplying air out of the pressure regulating chamber; the pressure regulating chamber includes an air inlet chamber and an air outlet chamber located above the air inlet chamber, the air inlet chamber being connected to the air inlet port, and the air outlet chamber being connected to the air outlet port; the automatic control valve also includes a partition plate disposed between the air inlet chamber and the air outlet chamber, the partition plate being provided with a circular hole, and a gravity ball with a diameter larger than the diameter of the circular hole being placed on the upper side of the circular hole.

[0010] Furthermore, the passive pressure relief mechanism has a receiving box fixed to the cabinet, the receiving box forming a receiving cavity for receiving the gear and the top block, the air inlet port of the automatic conduction valve being connected to the receiving cavity, and the gas passage having an air inlet section connecting the receiving cavity to the outside.

[0011] Furthermore, the automatic control valve also has a connecting cavity disposed between the air outlet chamber and the air outlet port, and a water-absorbing molecular sieve is disposed in the connecting cavity.

[0012] Furthermore, the top block has a base disposed on the mating surface opposite to the door body, and the passive pressure relief mechanism also has an elastic element that drives the base away from the door body.

[0013] Furthermore, the passive pressure relief mechanism also has a first limiting part for limiting the extreme position of the drive block in the direction of the cabinet interior and a second limiting part for limiting the extreme position of the top block in the direction away from the door.

[0014] Furthermore, the top block has a top head for supporting the sealing strip and a top rod for fixing the top head, wherein the cross-sectional area of ​​the top head is larger than the cross-sectional area of ​​the top rod.

[0015] Furthermore, the top head is made of a flexible material.

[0016] Furthermore, the passive pressure relief mechanism also has a guide mechanism that limits the direction of movement of the top block to be perpendicular to the plane on which the door surface is located when the top block moves.

[0017] Furthermore, the passive pressure relief mechanism has a receiving box fixed to the side wall, the receiving box forming a receiving cavity for receiving the drive block, the gear and the top block; the guiding mechanism includes a guide groove extending in the same direction as the lifting direction of the top block and a guide protrusion engaging with the guide groove, one of the guide groove and the guide protrusion being disposed on the top block and the other being disposed on the inner wall of the receiving box.

[0018] The beneficial effects of the present invention are as follows: The freezer involved in the present invention has a passive pressure relief mechanism and an active pressure relief mechanism. In specific application scenarios, the active pressure relief mechanism can avoid the formation of excessive negative pressure inside the freezer by actively relieving pressure, and can also overcome the problem of severe cold leakage caused by keeping the inside and outside of the freezer constantly connected. The passive pressure relief mechanism can completely eliminate the negative pressure formed inside the freezer when necessary, and its cooperation with the active pressure relief mechanism can shorten the time for users to perform pressure relief operations. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 The diagram shown is an overall structural schematic of the freezer of the present invention;

[0021] Figure 2 As shown Figure 1 A schematic diagram of the first angle from which the cabinet body and door body are separated;

[0022] Figure 3 As shown Figure 2 Enlarged diagram of part a;

[0023] Figure 4 As shown Figure 1 A second-angle schematic diagram showing the separation of the central cabinet and the door;

[0024] Figure 5 As shown Figure 1 A schematic diagram of the cross-section of the structure shown after being cut along the AA' direction;

[0025] Figure 6 As shown Figure 5 Enlarged schematic diagram of part b in the middle;

[0026] Figure 7 As shown Figure 6 A schematic diagram showing the top block lifting the sealing strip;

[0027] Figure 8 The diagram shows an overall structure of an active pressure relief mechanism and a passive pressure relief mechanism working together.

[0028] Figure 9 As shown Figure 8 An exploded schematic diagram of an automatic control valve and a passive pressure relief mechanism working together.

[0029] Figure 10 As shown Figure 9 A cross-sectional view of the automatic control valve when it is not in operation;

[0030] Figure 11 As shown Figure 9 A cross-sectional view of the automatic control valve when it is turned on;

[0031] Figure 12 The diagram shown is a three-dimensional schematic of one implementation structure of a passive pressure relief mechanism;

[0032] Figure 13 As shown Figure 8 The diagram shows the first disassembled state of the passive pressure relief mechanism.

[0033] Figure 14 As shown Figure 8 The diagram shows the second type of disassembly of the passive pressure relief mechanism. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] refer to Figure 1 , Figure 4 As shown, the freezer with dual pressure relief function involved in this invention includes a cabinet body 100, a door body 200, and a sealing strip 300 fixed to the door body 200. Further combined with... Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the cabinet 100 has a mating surface 10 that seals with the sealing strip 300 when the door 200 is closed. Specifically, in this embodiment, it is easy to understand that the cabinet 100 has a bottom wall and a side wall extending upward from the periphery of the bottom wall. An end shell (not shown in the figure) is provided at the end of the side wall away from the bottom wall (i.e., the end located at the door 200). The side surface of this end facing the door 200 constitutes the mating surface 10.

[0036] The freezer with dual pressure relief function involved in this invention also has an active pressure relief mechanism and a passive pressure relief mechanism installed on the side wall of the cabinet 100.

[0037] Combination Figure 8 , Figure 9 As shown, the active pressure relief mechanism involved has a gas passage connecting the inside and outside of the freezer and an automatic opening valve 51 that automatically opens the gas passage when the pressure difference between the inside and outside of the freezer is greater than a set value.

[0038] Further integration Figure 7 , Figure 12 , Figure 13 , Figure 14 As shown, the passive pressure relief mechanism includes: a triggering unit 43; a driving block 430, which is triggered by the triggering unit 43 and moves along the corresponding sidewall thickness direction after triggering, and has a first rack portion 4300; a gear 42, which rotates about a rotating shaft 420 and meshes with the first rack portion 4300; and a top block 41, which is movable in a direction perpendicular to the plane where the mating surface 10 is located, has a second rack portion 410 and meshes with the gear 42 through the second rack portion 410; wherein, when the triggering unit 43 triggers the driving block 430 to move, the gear 42 rotates and drives the top block 41 to at least partially protrude beyond the mating surface 10, so as to lift the seal 300 and form an air-permeable gap between the sealing strip 300 and the mating surface 10.

[0039] The freezer involved in this invention has a passive pressure relief mechanism and an active pressure relief mechanism. In specific application scenarios, the active pressure relief mechanism can prevent excessive negative pressure from forming inside the freezer by actively relieving pressure, and can also overcome the problem of severe cold leakage caused by keeping the inside and outside of the freezer constantly connected. The passive pressure relief mechanism can completely eliminate the negative pressure formed inside the freezer when necessary, and its cooperation with the active pressure relief mechanism can shorten the time for users to perform pressure relief operations.

[0040] Specifically, in applications where immediate pressure relief is required in a particular freezer, the user can trigger the top block 41 to lift the sealing strip 300 by triggering the trigger unit 43, thus creating an air gap between the sealing strip 300 and the mating surface 10, thereby achieving pressure balance adjustment inside and outside the freezer. Correspondingly, when the top of the top block 41 does not protrude beyond the mating surface 10, a seal is formed between the sealing strip 300 and the mating surface 10, and air no longer flows between the inside and outside of the freezer. The freezer then achieves intermittent pressure relief through the active pressure relief mechanism.

[0041] In this invention, the automatic control valve 51 has a pressure regulating chamber, an air inlet port 511 for supplying air into the pressure regulating chamber, and an exhaust port 512 for supplying air out of the pressure regulating chamber. Combined with Figure 9 , Figure 10 , Figure 11 As shown, in some specific embodiments, the air pressure regulating chamber includes an air inlet chamber 513 and an air outlet chamber 514 located above the air inlet chamber 513. The air inlet chamber 513 is connected to the air inlet port 511, and the air outlet chamber 514 is connected to the air outlet port 512. As shown in the figure, the automatic control valve 51 also includes a partition plate 515 disposed between the air inlet chamber 513 and the air outlet chamber 514. The partition plate 515 is provided with a circular hole 5150, and a gravity ball 516 with a diameter larger than the diameter of the circular hole 5150 is placed on the upper side of the circular hole 5150.

[0042] Based on the above-mentioned structure of the automatic control valve 51, when the pressure difference between the inlet port 511 and the exhaust port 512 of the automatic control valve 51 is small, the gravity ball 516 falls at the position of the circular hole 5150 and forms a seal between it and the side wall of the circular hole 5150, which can realize the active closure of the gas pipeline; when the pressure on the inlet port 511 of the automatic control valve 51 is greater than the pressure on the exhaust port 512, and the pressure difference between the two is not less than the weight of the gravity ball 516, the gravity ball 516 will float up under the action of this pressure difference and form a gap with the circular hole 5150 for air flow, thereby realizing the active opening of the gas pipeline.

[0043] In the specific implementation process, in order to ensure good sealing between the gravity ball 516 and the circular hole 5150, the sidewall of the circular hole 5150 is formed with a curved surface that matches the surface of the gravity ball 516.

[0044] refer to Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown in the specific embodiment, the passive pressure relief mechanism has a receiving box 46 fixed to the cabinet 100. The receiving box 46 forms a receiving cavity (not shown in the figure) for receiving gear 42 and top block 41. The air inlet port 511 of the automatic conduction valve 41 is connected to the receiving cavity of the receiving box 46. The gas channel constituting the active pressure relief mechanism has an air inlet section that connects the receiving cavity to the outside.

[0045] Specifically, the side wall of the receiving box 46 is provided with a mating interface 463 that mates with the air inlet port 511 of the automatic control valve 51, and the air inlet port 511 of the automatic control valve 51 is connected to the mating interface 463.

[0046] Further integration Figure 6 , Figure 12As shown, the storage box 46 has an air inlet 462 on the side facing the outer wall of the cabinet 11, and the outer wall of the cabinet 11 has a mating hole 101 that mates with the air inlet 462. The mating hole 101 and the air inlet 462 together form the air intake section of the gas channel, through which external air enters the storage cavity of the storage box 46.

[0047] As a preferred option, refer to Figure 10 , Figure 11 As shown in the figure, the automatic control valve 51 involved in this embodiment also has a connecting cavity 517 disposed between the air outlet cavity 514 and the air outlet port 512, and a water-absorbing molecular sieve (not shown in the figure) is disposed in the connecting cavity 517. In the specific application scenario of the freezer, the water-absorbing molecular sieve can absorb water vapor in the air, thus effectively avoiding the problem of the automatic control valve 51 becoming blocked due to frost. Typically, the two ends of the connecting cavity 517 are provided with partitions, and the connecting cavity 517 is connected to the air outlet cavity 514 and the air outlet port 512 through small holes provided on the partitions.

[0048] In this specific embodiment, the active pressure relief mechanism is located inside the side wall of the cabinet 100, as shown in the reference. Figure 8 As shown, the gas passage constituting the active pressure relief mechanism also includes an exhaust pipe 53 that connects to the interior space of the freezer, and a connecting pipe 52 that connects the exhaust pipe 53 and the exhaust port 512. The connecting pipe 52 is usually made of a flexible hose, so that the connection and assembly between the components can be easily achieved when the positions of the exhaust pipe 53 and the automatic control valve 51 are determined.

[0049] In addition, for ease of assembly, refer to Figure 9 As shown in the figure, the automatic control valve 51 involved in this specific embodiment can also be composed of a main body 510 connected to the connecting pipe 52 and a mating part 5100 fastened to the main body 510, wherein the air inlet port 511 of the automatic control valve 51 is located on the mating part 5100.

[0050] Specifically, in some embodiments of the present invention, reference is made to... Figures 6-10 As shown, the trigger unit 43 is a mechanical button fixedly connected to the drive block 430. When the operator presses the trigger unit 43, it will cause the trigger unit 43 to move, thereby causing the drive block 430 to move synchronously.

[0051] It is understood that in some other embodiments of the present invention not shown, the triggering unit 43 may also include an electronic switch and a motor or cylinder controlled by the electronic switch, and the drive block 430 is connected to the power output terminal of the motor or cylinder.

[0052] refer to Figures 6-10As shown in the illustration, in this embodiment, the top block 41 has a base 411 disposed on the mating surface 10 away from the door body. The passive pressure relief mechanism also has an elastic element 44 that drives the base 411 away from the door body 200. In this embodiment, the passive pressure relief mechanism has a receiving box 46 fixed to the side wall of the cabinet 100. The receiving cavity 46 forms a receiving cavity for receiving the drive block 430, the gear 42, and the top block 41. The elastic element 44 is a spring that is compressed between the base 411 and the top wall of the receiving box 46. Based on the setting of the elastic element 44, when the user does not release the trigger unit 43, the elastic element 44 can drive the top block 41 back to the initial position.

[0053] Based on the above-described features of this invention, it can be understood that when a user needs to open the door 200, the refrigerator can first be depressurized via the passive pressure relief mechanism, thereby facilitating the opening of the door 200. Combined with... Figure 6 , Figure 7 As shown, the specific pressure relief process of the freezer is as follows: When pressure relief is needed, the user triggers the trigger unit 43, causing the drive block 430 to move. The gear 42 rotates under the action of the first rack portion 4300, causing the top block 41 to move towards the door 200 under the cooperation of the second gear portion 410 and the gear 42. A portion of the top block 41 protrudes beyond the mating surface 10, creating a ventilation gap between the sealing strip 300 and the mating surface 100. After pressure relief is completed, the user releases the trigger unit 43, and the elastic element 44 drives the top block 41 to move away from the door 200. The gear 42 rotates in the opposite direction under the action of the second rack portion 410, causing the drive block 430 to return to its initial position under the cooperation of the first rack portion 4300 and the gear 42. During this process, the top block 41 retracts under the action of the elastic element 44 until it does not extend beyond the mating surface 10. It should be understood that the initial position of the drive block 430 refers to the position of the drive block 430 when the user has not triggered the trigger unit 43.

[0054] In some embodiments of the present invention, the passive pressure relief mechanism further includes a first limiting portion 451 for limiting the maximum position of movement of the drive block 430 toward the interior of the cabinet 100, and a second limiting portion 452 for limiting the maximum position of movement of the top block 41 toward the side away from the door 200. In the illustrated embodiment, both the first limiting portion 451 and the second limiting portion 452 are formed on the inner wall of the receiving box 46. Based on the provision of the first limiting portion 451 and the second limiting portion 452, the maximum depth of movement of the drive block 430 toward the interior of the cabinet 100 and the maximum position of retraction of the top block 41 can be limited.

[0055] In this specific embodiment, the first limiting part 451, the second limiting part 452 and the inner wall of the receiving box 46 form an independent chamber inside the receiving cavity. The independent chamber is connected to the receiving cavity of the receiving box 46. The first limiting part 451 and the second limiting part 452 are provided with a connecting hole 4510 for the two to communicate. The mating interface 463 of the air inlet port 511 is directly connected to the independent chamber.

[0056] In this invention, the top block 41 has a top head 413 for lifting the sealing strip 300 and a top rod 412 for fixing the top head 413. Specifically, the top rod 412 is connected between the top head 413 and the base 411. More preferably, the cross-sectional area of ​​the top head 413 is larger than the cross-sectional area of ​​the top rod 412. In this invention, because the cross-sectional area of ​​the top head 413 is larger than the cross-sectional area of ​​the top rod 412, when the top block 41 lifts the sealing strip 300, a sufficiently large air gap is formed between the sealing strip 300 and the mating surface 10, thereby reducing the pressure relief time.

[0057] More preferably, the top head 413 is made of a flexible material. This reduces the damage to the sealing strip 300 caused by the top head 413 when the top block 41 is lifted.

[0058] In some other embodiments of the present invention (not shown), the portion of the top head 413 protruding beyond the mating surface 10 is provided with a through hole, the extension direction of which is consistent with the thickness direction of the side wall for which the passive pressure relief mechanism is installed. In practical implementation, when the top block 41 pushes up the sealing strip 300, it itself obstructs the air permeability of the air gap. The through hole in this embodiment eliminates this obstruction, ensuring the air permeability of the air gap.

[0059] More preferably, the passive pressure relief mechanism of the present invention also has a guide mechanism that limits the moving direction of the top block 41 to be perpendicular to the plane on which the surface of the door body 200 is located when the top block 41 moves.

[0060] Specifically, refer to Figure 9 , Figure 10 As shown, the guiding mechanism includes a guide groove 461 extending in the same direction as the lifting direction of the top block 41, and a guide protrusion 414 that engages with the guide groove 461. The guide protrusion 414 is disposed on the top block 41, and the guide groove 461 is disposed on the inner wall of the receiving box 46. In other embodiments of the invention, the positions of the guide protrusion 414 and the guide groove 461 can be interchanged; that is, the guide protrusion 414 is disposed on the inner wall of the receiving box 46, while the guide groove 461 is disposed on the top block 41.

[0061] It is understood that the interior of the freezer cabinet 200 in this invention needs to be filled with foam material. In this embodiment, the receiving box 46 provides an independent space to prevent the foam material from entering, thereby ensuring the normal operation of the passive pressure relief mechanism. Typically, refer to... Figure 8 , Figure 9 As shown, one side of the housing 46 has an opening for assembling various components, and the passive pressure relief mechanism also has a cover plate (not shown in the figure) to close the opening.

[0062] In this invention, the freezer door 200 is rotatably connected to the cabinet body 100, specifically via a hinge. As a preferred embodiment of this invention, see reference... Figure 2 , Figure 3 As shown, the passive pressure relief mechanism is fixed to the side of the cabinet 100 away from the hinge. When users take items out of the freezer, they usually stand on the side of the cabinet 100 away from the hinge. Based on the arrangement of this embodiment, it is convenient for users to operate.

[0063] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0064] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A refrigerator with dual pressure relief function, comprising a cabinet body, a door body, and a sealing strip fixed to the door body, wherein the cabinet body has a mating surface that seals with the sealing strip when the door body is closed; characterized in that, The freezer also has an active pressure relief mechanism and a passive pressure relief mechanism installed on the side wall of the freezer body; The active pressure relief mechanism has a gas passage connecting the inside and outside of the freezer and an automatic opening valve that automatically opens the gas passage when the pressure difference between the inside and outside of the freezer is greater than a set value. The automatic opening valve has a pressure regulating chamber, an air inlet port for supplying air into the pressure regulating chamber, and an exhaust port for supplying air out of the pressure regulating chamber. The passive pressure relief mechanism includes: a triggering unit; a driving block, triggered by the triggering unit and moving along the corresponding sidewall thickness direction after triggering, having a first rack portion; a gear, rotating about a pivot and meshing with the first rack portion; and a top block, movable in a direction perpendicular to the plane of the mating surface, having a second rack portion and meshing with the gear through the second rack portion; wherein, when the triggering unit triggers the driving block to move, the gear rotates to drive the top block to at least partially protrude beyond the mating surface to lift the sealing strip and form an air-permeable gap between the sealing strip and the mating surface; The passive pressure relief mechanism also has a first limiting part for limiting the maximum position of the drive block in the direction of the cabinet interior and a second limiting part for limiting the maximum position of the top block in the direction away from the door, and a receiving box fixed to the cabinet. The receiving box forms a receiving cavity for receiving the gear and the top block. The first limiting part, the second limiting part and the inner wall of the receiving box form an independent chamber inside the receiving cavity. The independent chamber communicates with the receiving cavity of the receiving box. The first limiting part and the second limiting part are provided with communication holes for communication between the two. The interface of the air inlet port is directly connected to the independent chamber.

2. The freezer with dual pressure relief function according to claim 1, characterized in that, The air pressure regulating chamber includes an air inlet chamber and an air outlet chamber located above the air inlet chamber. The air inlet chamber is connected to the air inlet port, and the air outlet chamber is connected to the air outlet port. The automatic control valve also includes a partition plate disposed between the air inlet chamber and the air outlet chamber. The partition plate is provided with a circular hole, and a gravity ball with a diameter larger than the diameter of the circular hole is placed on the upper side of the circular hole.

3. The freezer with dual pressure relief function according to claim 2, characterized in that, The air inlet port of the automatic control valve is connected to the receiving cavity, and the gas passage has an air inlet section that connects the receiving cavity to the outside.

4. The freezer with dual pressure relief function according to claim 2, characterized in that, The automatic control valve also has a connecting cavity disposed between the air outlet chamber and the exhaust port, and a water-absorbing molecular sieve is disposed in the connecting cavity.

5. The freezer with dual pressure relief function according to any one of claims 1-4, characterized in that, The top block has a base disposed on the mating surface opposite to the door body, and the passive pressure relief mechanism also has an elastic element that drives the base away from the door body.

6. The freezer with dual pressure relief function according to claim 5, characterized in that, The top block has a top head for supporting the sealing strip and a top rod for fixing the top head, wherein the cross-sectional area of ​​the top head is larger than the cross-sectional area of ​​the top rod.

7. The freezer with dual pressure relief function according to claim 6, characterized in that, The top head is made of a flexible material.

8. The freezer with dual pressure relief function according to claim 5, characterized in that, The passive pressure relief mechanism also has a guide mechanism that limits the direction of movement of the top block to be perpendicular to the plane on which the door surface is located when the top block moves.

9. The freezer with dual pressure relief function according to claim 8, characterized in that, The passive pressure relief mechanism has a receiving box fixed to the side wall, the receiving box forming a receiving cavity for receiving the drive block, the gear and the top block; the guiding mechanism includes a guide groove extending in the same direction as the lifting direction of the top block and a guide protrusion cooperating with the guide groove, one of the guide groove and the guide protrusion being disposed on the top block and the other being disposed on the inner wall of the receiving box.

Images