Refrigerator pressure relief device

Abstract

The invention relates to the technical field of refrigerators, and provides a refrigerator pressure relief device which comprises a door body, a handle, a valve rod, a limiting cover and a spring, the handle is hinged to the door body, a pressure relief hole used for communicating the inside and the outside of a refrigerator is formed in the door body, and the limiting cover is connected to the outer side of the door body and buckled to the pressure relief hole. A pressure relief hole is formed in the limiting cover, a vent hole is formed in the limiting cover, a valve block matched with the pressure relief hole is arranged at one end of the valve rod, the valve block is located in the limiting cover and used for abutting against the end of the pressure relief hole, and the other end of the valve rod penetrates through the limiting cover and then is hinged to the handle. The handle is used for driving the valve rod to move towards or away from the pressure relief hole, the valve rod is sleeved with the spring, the spring is located in the limiting cover, and one end of the spring abuts against the valve block. Through the structural arrangement, the refrigerator can be opened more conveniently in a labor-saving mode while the airtight performance of the refrigerator is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator pressure relief device and a refrigerator. Background Art

[0002] As one of the indispensable electrical appliances in home life, refrigerators occupy an important share of the market. As consumers' requirements for the quality of fresh food increase, the requirements for refrigerators are also getting higher and higher, requiring refrigerators to have better sealing performance and cooling, preservation and freezing performance.

[0003] However, since the refrigerator cavity is a low-temperature area, as the temperature inside the box drops, the pressure gradually decreases, thereby forming a pressure difference between the inside and outside of the box, making it difficult or even impossible to open the door. This situation is particularly evident in ultra-low temperature refrigerators. At the same time, regardless of the refrigerator's insulation, temperature performance and energy consumption, refrigerator products must continuously improve their airtightness, which makes opening the door even more difficult. Summary of the Invention

[0004] In order to address the shortcomings of the existing technology, the present invention provides a refrigerator pressure relief device and a refrigerator, which solve the technical problems in the above-mentioned background technology that as the temperature in the refrigerator decreases, the pressure difference increases, and in order to improve airtightness to optimize insulation and energy efficiency, opening the door becomes increasingly difficult.

[0005] The present invention provides a refrigerator pressure relief device, comprising a door body, a handle, a valve stem, a limit cover and a spring, the handle being hinged to the door body, the door body being provided with a pressure relief hole for connecting the inside and outside of the refrigerator, the limit cover being connected to the outside of the door body and buckled at the pressure relief hole, and the limit cover being provided with a vent hole, one end of the valve stem being provided with a valve block adapted to the pressure relief hole, and the valve block being located in the limit cover and being used to abut against the end of the pressure relief hole, the other end of the valve stem being hinged to the handle after passing through the limit cover, and the handle being used to drive the valve stem to move toward or away from the pressure relief hole, the spring being sleeved on the valve stem and located in the limit cover, one end of the spring abutting against the valve block, and the other end abutting against the inner wall of the limit cover.

[0006] Optionally, the refrigerator pressure relief device also includes an electrically connected push switch and an electromagnetic lock, the push switch is arranged on the handle, and the electromagnetic lock is arranged at the connection between the pressure relief hole and the valve block, and the push switch is used to open the electromagnetic lock when pressed to release the connection between the pressure relief hole and the valve block.

[0007] Optionally, the electromagnetic lock includes a first lock body and a second lock body that are adapted to each other, the first lock body and the second lock body are both circular electromagnet structures, the first lock body is connected to the end peripheral side of the pressure relief hole on the door body, and the second lock body is connected to the valve block.

[0008] Optionally, the pressure relief hole is a circular through hole, the valve block is a hemispherical structure, a circular protrusion is provided at the end of the pressure relief hole close to the valve block, and a circular groove adapted to the circular protrusion is provided on the valve block.

[0009] Optionally, a circular groove is formed on the top of the spherical surface of the valve block.

[0010] Optionally, the refrigerator pressure relief device further includes a sealing ring, which is sleeved on the valve block and is used to abut against the hole wall of the pressure relief hole.

[0011] Optionally, the refrigerator pressure relief device further includes a heating structure, which is disposed in the door body and located at the connection between the pressure relief hole and the valve block.

[0012] Optionally, the heating structure is an electric heating wire, and the electric heating wire is wound around the circumference of the pressure relief hole close to one end of the valve block.

[0013] Optionally, a long hole is provided on the handle, and an end of the valve stem away from the valve block is hingedly and slidably connected to the long hole.

[0014] Compared with the prior art, the refrigerator pressure relief device provided by the present invention has the following technical effects:

[0015] 1. The refrigerator pressure relief device provided by the present invention, by setting the structure of the door body and the handle, and the coordinated design of the pressure relief hole and the limit cover, can simplify the process of opening the refrigerator door through the relative movement of the valve stem when the handle is pried open, making door opening more labor-saving and convenient, especially when there is a large pressure difference between the inside and outside of the refrigerator, the pressure relief design can reduce the resistance to opening the door.

[0016] 2. When the door of the refrigerator pressure relief device provided by the present invention is closed, the spring and atmospheric pressure make the valve block seal in contact with the pressure relief hole, ensuring the airtightness of the refrigerator when not in use. This not only maintains the stability of the temperature and humidity inside the refrigerator, but also prevents cold air leakage, which helps to improve energy efficiency.

[0017] 3. When the handle of the refrigerator pressure relief device provided by the present invention is turned, the valve stem drives the valve block to disengage from the pressure relief hole, thereby facilitating the balance of air pressure inside and outside the refrigerator and reducing resistance when opening the door. This automatic pressure relief design effectively avoids the difficulty in opening the door caused by air pressure differences, especially when the refrigerator door is heavy or the air pressure inside the refrigerator is too high, making it easier to open the door.

[0018] 4. The refrigerator pressure relief device provided by the present invention is guided by the limit cover through the linear reciprocating motion of the valve stem, which ensures the precise operation of the valve block, can flexibly close or open the pressure relief hole, ensures stability during pressure relief, and avoids airtightness problems.

[0019] 5. The refrigerator pressure relief device provided by the present invention is designed with a spring so that after the door body is opened, the valve block can automatically return to its original position by elastic force and restore the sealing state. This not only ensures the sealing of the refrigerator door body in the closed state, but also improves the convenience and comfort of use.

[0020] 6. The refrigerator pressure relief device provided by the present invention can maintain the sealing performance of the refrigerator when not in use through the ingenious design of the valve block and the pressure relief hole, and can also drive pressure relief through the handle when needed, which simplifies user operation and improves the overall user experience.

[0021] In addition, the present invention also provides a refrigerator, comprising the above-mentioned refrigerator pressure relief device.

[0022] Compared with the prior art, the refrigerator provided by the present invention has substantially the same technical effect as the above-mentioned refrigerator pressure relief device by setting the above-mentioned refrigerator pressure relief device, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of a refrigerator according to an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the side structure of a refrigerator according to an embodiment of the present invention;

[0025] Figure 3 for Figure 1 Schematic diagram of the AA cross-section structure;

[0026] Figure 4 for Figure 1 Middle AA section structural diagram of the handle in rotating state;

[0027] Figure 5 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0028] Figure 6 for Figure 4 Enlarged schematic diagram at point C in the middle.

[0029] Description of reference numerals:

[0030] 10. Door body; 11. Pressure relief hole; 12. Circular protrusion; 20. Handle; 21. Push switch; 22. Long hole; 30. Valve stem; 31. Valve block; 311. Circular groove; 40. Limit cover; 41. Vent; 50. Spring; 60. Electromagnetic lock; 70. Electric heating wire; 80. Hinge seat. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0032] The interior of an existing refrigerator cavity is a low-temperature area. As the temperature inside the box drops, the pressure gradually decreases, forming a pressure difference between the inside and outside of the box, making it difficult or even impossible to open the door. This situation is particularly evident in ultra-low temperature refrigerators. At the same time, regardless of the refrigerator's insulation, temperature performance and energy consumption, refrigerator products must continuously improve their airtightness, which makes opening the door even more difficult.

[0033] In order to solve the above technical problems, Figures 1 to 6 As shown, an embodiment of the present invention provides a refrigerator pressure relief device, including a door body 10, a handle 20, a valve stem 30, a limiting cover 40 and a spring 50. The handle 20 is hinged to the door body 10, and a pressure relief hole 11 for connecting the inside and outside of the refrigerator is opened on the door body 10. The limiting cover 40 is connected to the outside of the door body 10 and is buckled at the pressure relief hole 11. A vent 41 is opened on the limiting cover 40. One end of the valve stem 30 is provided with a valve block 31 adapted to the pressure relief hole 11, and the valve block 31 is located in the limiting cover 40 and is used to abut against the end of the pressure relief hole 11. The other end of the valve stem 30 passes through the limiting cover 40 and is hinged to the handle 20. The handle 20 is used to drive the valve stem 30 to move toward or away from the pressure relief hole 11. The spring 50 is sleeved on the valve stem 30 and is located in the limiting cover 40. One end of the spring 50 abuts against the valve block 31, and the other end abuts against the inner wall of the limiting cover 40.

[0034] It should be noted that the initial state of the pressure relief device of the refrigerator is that the handle 20 is in a vertical state, the valve block 31 is squeezed and sealed at the end of the pressure relief hole 11, part of the valve block 31 is located in the pressure relief hole 11, and the valve block 31 is made of a deformable material, such as rubber, etc., and, in order to improve the airtightness at the pressure relief hole 11, structural parts such as sealing rings can also be provided on the valve block 31, and the initial state and installation of the spring 50 are in a compressed state, that is, the valve block 31 is pressed at the end of the pressure relief hole 11 to ensure the airtightness of the refrigerator.

[0035] In this embodiment, the refrigerator pressure relief device provided in this embodiment can be used as the door opening structure of the refrigerator by setting the door body 10 and the handle 20, and a pressure relief hole 11 is opened on the door body 10, and the air inside and outside the refrigerator can be connected through the pressure relief hole 11 and the vent 41 on the limit cover 40. By setting a valve stem 30 and hinged with the handle 20, and the handle 20 is hinged with the door body 10, when the door body 10 is opened by prying the handle 20, the valve stem 30 can be driven to move relative to each other, and the valve stem After passing through the limit cover 40, it is hinged to the handle 20. The limit cover 40 can guide the valve stem 30 so that the movement of the valve stem 30 is a linear reciprocating movement. By arranging a valve block 31 adapted to the pressure relief hole 11 on the valve stem 30, when the valve stem 30 moves with the handle 20, the valve block 31 can be sealed from abutting with the pressure relief hole 11 to releasing the seal for ventilation and pressure relief, and can reciprocate. At the same time, by buckling the limit cover 40 at the position of the pressure relief hole 11 and inside it, A spring 50 is provided at the bottom. By sleeved on the valve stem 30, and with its two ends respectively abutting against the valve block 31 and the inner wall of the limit cover 40, when the handle 20 is not rotated, the valve block 31 can be abutted against the end of the pressure relief hole 11 to ensure airtightness. After the handle 20 is rotated to open the door body 10, the valve stem 30 can be moved back to the initial position by the elastic force of the valve block 31, and the handle 20 can be brought back to the initial position. Then, when in use, the handle 20 is moved, and the handle 20 is relatively The door body 10 rotates, and at the same time drives the valve stem 30 to move linearly, causing the valve block 31 to separate from the pressure relief hole 11. At this time, the pressure relief hole 11 and the vent hole 41 on the limit cover 40 connect the air inside and outside the refrigerator, making the air pressure inside and outside the refrigerator the same. When the door body 10 is opened by the handle 20, it is more labor-saving and convenient. At the same time, when the handle 20 is not moved, that is, when the door body 10 is closed, the spring 50 and the atmospheric pressure can press the valve block 31 against the pressure relief hole 11, ensuring the sealing performance of the refrigerator. Through the above structural arrangement, while ensuring the airtight performance of the refrigerator, it makes opening the refrigerator more convenient and labor-saving.

[0036] Alternatively, as Figures 2 to 6 As shown, the refrigerator pressure relief device also includes an electrically connected push switch 21 and an electromagnetic lock 60. The push switch 21 is arranged on the handle 20, and the electromagnetic lock 60 is arranged at the connection between the pressure relief hole 11 and the valve block 31. The push switch 21 is used to open the electromagnetic lock 60 when pressed to release the connection between the pressure relief hole 11 and the valve block 31.

[0037] Specifically, the electromagnetic lock 60 is a normally closed electromagnetic lock, and the push switch 21 and the electromagnetic lock 60 can also be connected to a controller, which controls the switch of the electromagnetic lock 60 and gives the controller an action instruction for switching the electromagnetic lock 60 by pressing the push switch 21.

[0038] In this embodiment, by arranging an electromagnetic lock 60 at the connection between the pressure relief hole 11 and the valve block 31, the connection stability between the pressure relief hole 11 and the valve block 31 can be further enhanced, the sealing performance is improved, and the overall air tightness of the refrigerator is ensured. In addition, by arranging a push switch 21 on the handle 20, the electromagnetic lock 60 can be opened by pressing the push switch 21 to release the connection relationship between the pressure relief hole 11 and the valve block 31, so that the handle 20 can be moved to open the door body 10, thereby preventing the handle 20 from being accidentally touched and then turned to open the door body 10, and preventing the valve block 31 from being separated from the pressure relief hole 11 after accidentally touching the handle 20, thereby affecting the air tightness of the refrigerator. The structure is more reasonable and reliable, and the stability and reliability of the overall structure are enhanced.

[0039] Alternatively, as Figure 5 As shown, the electromagnetic lock 60 includes a first lock body and a second lock body that are adapted to each other. The first lock body and the second lock body are both circular electromagnet structures. The first lock body is connected to the end side of the pressure relief hole 11 on the door body 10, and the second lock body is connected to the valve block 31.

[0040] Specifically, the first lock body and the second lock body are attracted to each other and locked after being powered on. After pressing the push switch 21, a power-off instruction can be given by the controller, for example, and the first lock body and the second lock body can be separated by powering off.

[0041] In this embodiment, by setting the electromagnetic lock 60 as the first lock body and the second lock body of the circular electromagnet structure, and respectively setting them on the end periphery of the pressure relief hole 11 and the valve block 31, the circular structure is more tightly connected, ensuring that the pressure relief hole 11 can be locked and sealed by the electromagnetic lock 60, further improving the overall air tightness.

[0042] Alternatively, as Figure 5 As shown, the pressure relief hole 11 is a circular through hole, the valve block 31 is a hemispherical structure, a circular protrusion 12 is provided at the end of the pressure relief hole 11 close to the valve block 31, and a circular groove adapted to the circular protrusion 12 is provided on the valve block 31.

[0043] In this embodiment, the pressure relief hole 11 is set as a circular through hole to facilitate processing, and the valve block 31 is set as a hemispherical structure, so that the two are matched and connected more tightly, and a circular protrusion 12 is set at the end of the pressure relief hole 11, and a circular groove adapted to it is set on the valve block 31. In the initial state, that is, when the door body 10 is closed, the circular protrusion 12 can be snapped into the circular groove, so that the pressure relief hole 11 and the valve block 31 are connected more tightly and firmly, thereby further improving the sealing performance at the pressure relief hole 11.

[0044] Alternatively, as Figure 5 and Figure 6 As shown, a circular groove 311 is formed on the top of the spherical surface of the valve block 31 .

[0045] Specifically, the circular groove 311 is opened at the top of the spherical surface of the valve block 31, that is, opened in the radial direction of the valve block 31 and in the length direction of the valve stem 30, and is consistent with the opening direction of the pressure relief hole 11, which is more convenient to use.

[0046] In this embodiment, a circular groove 311 is provided on the top of the spherical surface of the valve block 31, so that when the valve block 31 is squeezed and abutted into the pressure relief hole 11, a certain deformation space can be provided for the valve block 31, thereby making it more convenient to connect the pressure relief hole 11 and the valve block 31, and further improving the airtightness of the pressure relief hole 11 after being connected to the valve block 31.

[0047] Alternatively, as Figure 5 As shown, the refrigerator pressure relief device further includes a sealing ring, which is sleeved on the valve block 31 and is used to abut against the hole wall of the pressure relief hole 11.

[0048] Specifically, the sealing ring is a rubber ring, which can also be preset at the hole wall of the pressure relief hole 11 and used to abut against the valve block 31, and can also play a role in enhancing the sealing performance.

[0049] In this embodiment, a sealing ring is provided on the valve block 31. When the valve block 31 is connected to the pressure relief hole 11, the sealing ring can abut against the hole wall of the pressure relief hole 11 to further improve the sealing performance of the pressure relief hole 11 when no air is ventilated and pressure is relieved.

[0050] Alternatively, as Figure 5 and Figure 6 As shown, the refrigerator pressure relief device further includes a heating structure, which is disposed in the door body 10 and located at the connection between the pressure relief hole 11 and the valve block 31 .

[0051] It should be noted that during the use of the refrigerator, due to the temperature difference and air pressure inside and outside the refrigerator, frost may easily form at the connection between the pressure relief hole 11 and the valve block 31, affecting the opening between the valve block 31 and the pressure relief hole 11. Therefore, a heating structure can be set to heat it to prevent it from frosting.

[0052] In this embodiment, a heating structure is provided at the connection between the pressure relief hole 11 and the valve block 31 in the door body 10 to prevent frost from forming at the connection between the pressure relief hole 11 and the valve block 31 and thus prevent the connection from affecting its normal opening. The heating structure can be used to heat the connection between the pressure relief hole 11 and the valve block 31 to ensure the normal use of both, and the structure is more reasonable and reliable.

[0053] Alternatively, as Figure 5 and Figure 6 As shown, the heating structure is an electric heating wire 70 , which is wound around the pressure relief hole 11 near one end of the valve block 31 .

[0054] Specifically, the electric heating wire 70 is located inside the door body 10 and is wound around the end of the pressure relief hole 11 close to the valve block 31 . When powered on, the connection between the pressure relief hole 11 and the valve block 31 can be heated.

[0055] In this embodiment, by setting the heating structure as an electric heating wire 70 and winding it around the circumference of the pressure relief hole 11 near one end of the valve block 31, frost can be prevented at the connection between the pressure relief hole 11 and the valve block 31 due to long-term use. The connection can be heated and defrosted, so that the connection between the pressure relief hole 11 and the valve block 31 is effective for a long time, ensuring its sealing performance while making it easy to open for pressure relief, and the structure is stable and reliable.

[0056] Alternatively, as Figure 5 and Figure 6 As shown, a long hole 22 is formed on the handle 20 , and one end of the valve stem 30 away from the valve block 31 is hingedly and slidably connected to the long hole 22 .

[0057] Specifically, the length direction of the elongated hole 22 is aligned with the length direction of the handle 20. One end of the valve stem 30 is hingedly connected to the elongated hole 22 via a pin, and can rotate relative to the handle 20. One end of the valve stem 30 can also slide within the elongated hole 22. A hinge seat 80 is provided on the door body 10, and one end of the handle 20 is hingedly connected to the hinge seat 80.

[0058] In this embodiment, a long hole 22 is opened on the handle 20, and one end of the valve stem 30 opposite to the valve block 31 is hinged and slidably connected to the long hole 22, so that the valve stem 30 and the handle 20 can rotate relative to each other, and one end thereof can slide in the long hole 22, so that the valve stem 30 can make a linear motion along the axial direction of the pressure relief hole 11 as the handle 20 rotates, and the valve block 31 can abut against the pressure relief hole 11 for sealing and separation to relieve pressure. The structure is simple, the design is reasonable, the operation is stable and smooth, and the service life is extended.

[0059] In addition, if Figures 1 to 4 As shown, another embodiment of the present invention provides a refrigerator, comprising the above-mentioned refrigerator pressure relief device.

[0060] In this embodiment, the refrigerator provided in this embodiment has substantially the same technical effect as that of the above-mentioned refrigerator pressure relief device by providing the above-mentioned refrigerator pressure relief device, and will not be described in detail here.

[0061] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A refrigerator pressure relief device, characterized in that: The refrigerator comprises a door body (10), a handle (20), a valve stem (30), a limit cover (40) and a spring (50), wherein the handle (20) is hinged to the door body (10), the door body (10) is provided with a pressure relief hole (11) for connecting the inside and outside of the refrigerator, the limit cover (40) is connected to the outside of the door body (10) and is buckled on the pressure relief hole (11), and a vent hole (41) is provided on the limit cover (40), one end of the valve stem (30) is provided with a valve block (31) adapted to the pressure relief hole (11), and the The valve block (31) is located in the limiting cover (40) and is used to abut against the end of the pressure relief hole (11). The other end of the valve stem (30) passes through the limiting cover (40) and is hinged to the handle (20). The handle (20) is used to drive the valve stem (30) to move toward or away from the pressure relief hole (11). The spring (50) is sleeved on the valve stem (30) and is located in the limiting cover (40). One end of the spring (50) abuts against the valve block (31), and the other end abuts against the inner wall of the limiting cover (40).

2. The refrigerator pressure relief device according to claim 1, characterized in that: The refrigerator pressure relief device further comprises an electrically connected push switch (21) and an electromagnetic lock (60), wherein the push switch (21) is arranged on the handle (20), and the electromagnetic lock (60) is arranged at the connection between the pressure relief hole (11) and the valve block (31), and the push switch (21) is used to open the electromagnetic lock (60) when pressed, so as to release the connection between the pressure relief hole (11) and the valve block (31).

3. The refrigerator pressure relief device according to claim 2, characterized in that: The electromagnetic lock (60) comprises a first lock body and a second lock body that are matched with each other, the first lock body and the second lock body are both annular electromagnet structures, the first lock body is connected to the end circumference of the pressure relief hole (11) on the door body (10), and the second lock body is connected to the valve block (31).

4. The refrigerator pressure relief device according to claim 1, characterized in that: The pressure relief hole (11) is a circular through hole, the valve block (31) is a hemispherical structure, a circular protrusion (12) is provided at the end of the pressure relief hole (11) close to the valve block (31), and a circular groove matching the circular protrusion (12) is provided on the valve block (31).

5. The refrigerator pressure relief device according to claim 4, characterized in that: A circular groove (311) is formed on the top of the spherical surface of the valve block (31).

6. The refrigerator pressure relief device according to claim 1, characterized in that: The refrigerator pressure relief device also includes a sealing ring, which is sleeved on the valve block (31) and is used to abut against the hole wall of the pressure relief hole (11).

7. The refrigerator pressure relief device according to claim 1, characterized in that: The refrigerator pressure relief device also includes a heating structure, which is arranged in the door body (10) and located at the connection between the pressure relief hole (11) and the valve block (31).

8. The refrigerator pressure relief device according to claim 7, characterized in that: The heating structure is an electric heating wire (70), and the electric heating wire (70) is arranged around the circumference of the pressure relief hole (11) close to one end of the valve block (31).

9. The refrigerator pressure relief device according to claim 1, characterized in that: The handle is provided with a long hole (22), and one end of the valve stem (30) away from the valve block (31) is hingedly and slidably connected to the long hole (22).

10. A refrigerator, characterized in that: It comprises the refrigerator pressure relief device as described in any one of claims 1 to 9.

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