Refrigerator pressure equalization device

Abstract

This invention discloses a pressure balancing device for a freezer, comprising a knob, a top plate, and a pre-embedded box. The pre-embedded box houses a connecting shaft, a cam, a rotating rod, and a top rod. The pre-embedded box is fixedly installed within the foam layer of the freezer body. The front side of the pre-embedded box is flush with the inner wall of the freezer's outer shell, with a second mounting hole at the flushing position. The upper side of the pre-embedded box is flush with the inner wall of the freezer's opening, with a second through hole at the flushing position. In specific freezer applications requiring pressure relief, the top plate lifts the sealing strip, creating an air gap between the sealing strip and the mating surface of the freezer opening, thereby achieving pressure balance regulation between the inside and outside of the freezer. Correspondingly, when the top plate is completely within the second through hole, a seal is formed between the sealing strip and the mating surface of the freezer opening, preventing air circulation between the inside and outside of the freezer and effectively avoiding the increased energy consumption problem caused by cold leakage in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of freezer technology, and more specifically, to a freezer pressure balancing device. Background Technology

[0002] Refrigerators commonly experience negative pressure during use. The process is roughly as follows: When the door is opened, gas exchange occurs between the inside and outside of the freezer compartment, allowing warm outside air to enter. 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] In the existing technology, there are some technical solutions designed to relieve pressure and balance the pressure inside and outside the freezer. The most common solution is to set up a gas channel connecting the inside and outside of the freezer to achieve pressure balance. However, the gas channel involved in this technical solution has problems such as users not being able to control it and cold leakage. Moreover, the low temperature of the freezer will cause frost to form at the gas channel, which will block the gas channel over time, thus affecting the pressure balance effect.

[0004] Therefore, it is necessary to improve existing technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure relief device for opening a freezer door, aiming to solve at least one of the technical problems existing in the prior art. To achieve the above objective, the technical solution adopted is as follows:

[0006] A pressure balancing device for a freezer includes a knob, a top plate, and a pre-embedded box, wherein a connecting shaft, a cam, a rotating rod, and a top rod are installed in the pre-embedded box;

[0007] The embedded box has a first mounting hole on its front side, a first through hole on its upper side, and a strip groove along the left and right direction on the inner wall of its lower side. The embedded box is fixedly installed in the foam layer of the cabinet. The front side of the embedded box is in contact with the inner wall of the outer shell of the cabinet. A second mounting hole is provided on the outer shell at the contact position. The first mounting hole and the second mounting hole are arranged coaxially, and the inner diameter of the first mounting hole is smaller than the inner diameter of the second mounting hole. The upper side of the embedded box is in contact with the inner wall of the refrigerator door. A second through hole is provided on the refrigerator door at the contact position. The first through hole and the second through hole are arranged coaxially, and the inner diameter of the first through hole is smaller than the inner diameter of the second through hole.

[0008] The knob is rotatably mounted in the second mounting hole, and the first end of the connecting shaft is perpendicularly connected to the middle position of the knob;

[0009] The cam is rotatably placed in the strip groove. A shaft hole is provided in the middle of the cam. The second end of the connecting shaft is inserted into the shaft hole and connected by a flat key. An annular curved groove is provided on one side plane of the cam near the edge of the cam. The contour of the annular curved groove is consistent with the contour of the cam.

[0010] The top plate is located in the second through hole and is clearance-fitted with the second through hole. The top end of the push rod passes through the first through hole and is vertically fixed to the top plate. The bottom end of the push rod is vertically fixed to the first end of the rotating rod. The second end of the rotating rod extends into the annular curved groove and can slide along the annular curved groove.

[0011] The rotation of the cam can push the top plate out of the second through hole, and at the same time the top plate lifts the sealing strip, so that a ventilation gap is formed between the sealing strip and the mating surface of the cabinet opening.

[0012] Preferably, a sleeve is fixedly installed vertically inside the pre-embedded box, the sleeve being located directly below the first through hole, and the push rod is slidably located inside the sleeve.

[0013] Preferably, the knob protrudes from the outer shell of the cabinet.

[0014] Preferably, the thickness of the top plate does not exceed the height of the second through hole.

[0015] Preferably, the second mounting hole is located on the outer shell on the front side of the cabinet.

[0016] Preferably, the pre-embedded box has a rear opening to facilitate the assembly of the components inside the pre-embedded box, and a sealing rear cover is installed at the opening.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention discloses a pressure balancing device for a freezer. In specific application scenarios where the freezer needs pressure relief, the top plate lifts the sealing strip, creating an air gap between the sealing strip and the cabinet opening mating surface, thereby achieving pressure balance regulation inside and outside the freezer. Correspondingly, when the top plate is completely located in the second through hole, a seal is formed between the sealing strip and the cabinet opening mating surface, and air no longer flows between the inside and outside of the freezer, effectively avoiding the increased energy consumption problem caused by cold leakage in the prior art. Attached Figure Description

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

[0020] Figure 1 This is an exploded view of the device of the present invention.

[0021] Figure 2 This is a schematic diagram of the embedded box structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the embedded box of the present invention.

[0023] Figure 4 This is a schematic diagram of the device of the present invention installed in a freezer.

[0024] Figure 5 yes Figure 4 Enlarged view of A in the middle.

[0025] In the diagram: 1. Knob; 2. Top plate; 3. Embedded box; 4. Connecting shaft; 5. Cam; 6. Rotating rod; 7. Top rod; 8. Sealing back cover; 9. First mounting hole; 10. First through hole; 11. Strip groove; 12. Outer shell; 13. Cabinet opening; 14. Second mounting hole; 15. Second through hole; 16. Annular curved groove; 17. Sealing strip. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] Furthermore, in the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] A preferred embodiment of the present invention provides a freezer pressure balancing device, which is installed on the freezer to balance the air pressure inside and outside the freezer, so that users can easily open the freezer door.

[0029] like Figures 1 to 5 As shown, the device includes a knob 1, a top plate 2, and a pre-embedded box 3, in which a connecting shaft 4, a cam 5, a rotating rod 6, and a top rod 7 are installed.

[0030] The embedded box 3 is made of plastic and is integrally molded using an injection molding process, such as... Figure 2 As shown, the rear opening of the pre-embedded box 3 facilitates the assembly of various components inside the pre-embedded box 3. After assembly, a sealing rear cover 8 is installed at the opening to prevent the foaming agent from entering the pre-embedded box 3 during the foaming process of the refrigerator.

[0031] Furthermore, the front side of the embedded box 3 is provided with a first mounting hole 9, which is circular; the upper side of the embedded box 3 is provided with a first through hole 10, which is circular; a sleeve (not shown in the figure) is fixedly installed inside the embedded box, the sleeve is arranged vertically and is located directly below the first through hole; the lower side inner wall of the embedded box 3 is provided with a strip groove 11 along the left and right direction.

[0032] The embedded box 3 is fixedly installed in the foam layer of the cabinet. Specifically, the front side of the embedded box 3 is attached to the inner wall of the outer shell 12 of the front cabinet of the freezer, and the upper side of the embedded box 3 is attached to the inner wall of the cabinet opening 13 of the freezer.

[0033] A second mounting hole 14 is provided on the outer shell at the position where the front side of the embedded box 3 fits against the inner wall of the outer shell 12 of the cabinet. The second mounting hole 14 is circular. The first mounting hole 9 and the second mounting hole 14 are arranged coaxially, and the inner diameter of the first mounting hole 9 is smaller than the inner diameter of the second mounting hole 14.

[0034] Furthermore, the second mounting hole is located on the outer shell on the front side of the cabinet.

[0035] A second through hole 15 is provided on the upper side of the pre-embedded box 3 at the position where it fits against the inner wall of the refrigerator opening 13. The second through hole 15 is circular. The first through hole 10 and the second through hole 15 are arranged coaxially, and the inner diameter of the first through hole 10 is smaller than the inner diameter of the second through hole 15.

[0036] The knob 1 is located in the second mounting hole 14, and the knob 1 and the second mounting hole 14 are clearance-fitted to ensure that the knob 1 can rotate freely. In addition, since the inner diameter of the first mounting hole 9 is smaller than the inner diameter of the second mounting hole 14, it plays a limiting role for the knob 1 to prevent the knob 1 from being displaced in the longitudinal direction.

[0037] Furthermore, the knob 1 protrudes from the outer shell 12 of the cabinet, making it convenient for users to operate the knob rotation.

[0038] The first end of the connecting shaft 4 is vertically and fixedly connected to the middle position of the knob 1. Rotating the knob 1 can drive the connecting shaft 4 to rotate synchronously.

[0039] The cam 5 is rotatably placed in the strip-shaped groove 11, which limits the cam 5 to prevent longitudinal displacement. A shaft hole is provided in the middle of the cam 5, and the second end of the connecting shaft 4 is inserted into the shaft hole and connected to the cam 5 by a flat key. Rotating the connecting shaft 4 can drive the cam 5 to rotate synchronously.

[0040] Furthermore, an annular curved groove 16 is provided on one side plane of the cam 5 near the edge of the cam 5, and the outline of the annular curved groove 16 is consistent with the outline of the cam 5.

[0041] The top plate 2 is circular and is located within the second through hole 15, with a clearance fit. The thickness of the top plate 2 does not exceed the height of the second through hole 15 to ensure that the top plate 2 is completely positioned within the second through hole 15. The top end of the push rod 7 slidably passes through the sleeve and the first through hole 10 in sequence and is vertically fixedly connected to the top plate 2. The bottom end of the push rod 7 is vertically fixedly connected to the first end of the rotating rod 6, and the second end of the rotating rod 6 extends into the annular curved groove 16 and can slide along the annular curved groove 16.

[0042] When the freezer is closed, the top plate 2 is completely inside the second through hole 15, and the sealing strip 17 on the freezer door is in close contact with the mating surface of the cabinet opening 13 and completely covers the second through hole 15.

[0043] When a user needs to open the freezer, the air pressure inside and outside the freezer is first balanced by rotating button 1. Button 1 drives the connecting shaft 4 to rotate synchronously, which in turn drives the cam 5 to rotate synchronously. As the cam 5 rotates, it drives the rotating rod 6 to slide in the annular curved groove 16. When the protrusion of the cam 5 rotates to the top, it can push the top plate 2 out of the second through hole 15. Then the top plate 2 pushes up the sealing strip 17 on the freezer door, so that a ventilation gap is formed between the sealing strip 17 and the mating surface of the cabinet opening 13. Outside air enters the freezer through this gap to achieve air pressure balance. Then the user can easily open the freezer lid.

[0044] In summary, the freezer pressure balancing device described in this embodiment of the invention, in specific application scenarios where freezers require pressure relief, lifts the sealing strip 17 by the top plate 2, creating an air gap between the sealing strip 17 and the mating surface of the cabinet opening 13, thereby achieving pressure balance regulation inside and outside the freezer. Correspondingly, when the top plate 2 is completely located in the second through hole 15, a seal is formed between the sealing strip 17 and the mating surface of the cabinet opening 13, and air no longer flows between the inside and outside of the freezer, effectively avoiding the increased energy consumption problem caused by cold leakage in the prior art.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure balancing device for a freezer, characterized in that, It includes a knob, a top plate, and a pre-embedded box, in which a connecting shaft, a cam, a rotating rod, and a push rod are installed; The embedded box has a first mounting hole on its front side, a first through hole on its upper side, and a strip groove along the left and right direction on the inner wall of its lower side. The embedded box is fixedly installed in the foam layer of the cabinet. The front side of the embedded box is in contact with the inner wall of the outer shell of the cabinet. A second mounting hole is provided on the outer shell at the contact position. The first mounting hole and the second mounting hole are arranged coaxially, and the inner diameter of the first mounting hole is smaller than the inner diameter of the second mounting hole. The upper side of the embedded box is in contact with the inner wall of the refrigerator door. A second through hole is provided on the refrigerator door at the contact position. The first through hole and the second through hole are arranged coaxially, and the inner diameter of the first through hole is smaller than the inner diameter of the second through hole. The knob is rotatably mounted in the second mounting hole, and the first end of the connecting shaft is perpendicularly connected to the middle position of the knob; The cam is rotatably placed in the strip groove. A shaft hole is provided in the middle of the cam. The second end of the connecting shaft is inserted into the shaft hole and connected by a flat key. An annular curved groove is provided on one side plane of the cam near the edge of the cam. The contour of the annular curved groove is consistent with the contour of the cam. The top plate is located in the second through hole and is clearance-fitted with the second through hole. The top end of the push rod passes through the first through hole and is vertically fixed to the top plate. The bottom end of the push rod is vertically fixed to the first end of the rotating rod. The second end of the rotating rod extends into the annular curved groove and can slide along the annular curved groove. A sleeve is fixedly installed vertically inside the pre-embedded box. The sleeve is located directly below the first through hole, and the push rod is slidably located inside the sleeve. The rotation of the cam can push the top plate out of the second through hole, and at the same time the top plate lifts the sealing strip, so that a ventilation gap is formed between the sealing strip and the mating surface of the cabinet opening.

2. The freezer pressure balancing device according to claim 1, characterized in that, The knob protrudes from the outer shell of the cabinet.

3. The freezer pressure balancing device according to claim 1, characterized in that, The thickness of the top plate does not exceed the height of the second through hole.

4. A freezer pressure balancing device according to claim 1, characterized in that, The second mounting hole is located on the outer shell on the front side of the cabinet.

5. A pressure balancing device for a freezer according to claim 1, characterized in that, The pre-embedded box has a rear opening to facilitate the assembly of the components inside the box, and a sealed rear cover is installed at the opening.

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