CN-116857882-B - Pressure balancing device of refrigerator

Abstract

The invention discloses a pressure balancing device of a refrigerator, which comprises a knob, a top plate and a pre-buried box, wherein a connecting shaft, a cam, a rotating rod and a push rod are arranged in the pre-buried box, the pre-buried box is fixedly arranged in a foaming layer of a refrigerator body, the front side surface of the pre-buried box is attached to the inner wall of a shell of the refrigerator body, a second mounting hole is formed in the shell at the attached position, the upper side surface of the pre-buried box is attached to the inner wall of a refrigerator opening of the refrigerator, and a second through hole is formed in the refrigerator opening at the attached position. In the application scene that the specific refrigerator needs to be decompressed, the sealing strip is jacked up through the top plate, so that a ventilation gap is formed between the sealing strip and the matching surface of the refrigerator opening, and further the balance adjustment of the air pressure inside and outside the refrigerator is realized.

Inventors

• WANG FENG
• XUE LIANG
• SONG NAN
• XU GUANGJIAN
• WANG WEI
• Su Menglu
• XU LIANGTIAN
• TAN XINYI

Assignees

• 澳柯玛股份有限公司

Dates

Publication Date

20260505

Application Date

20230629

Claims (5)

1. 1. The pressure balancing device of the refrigerator is characterized by comprising a knob, a top plate and an embedded box, wherein a connecting shaft, a cam, a rotating rod and a push rod are arranged in the embedded box; The front side of the embedded box is provided with a first mounting hole, the upper side of the embedded box is provided with a first through hole, the inner wall of the lower side of the embedded box is provided with a strip-shaped groove along the left-right direction, the embedded box is fixedly arranged in a foaming layer of the cabinet body, the front side of the embedded box is attached to the inner wall of the outer shell of the cabinet body, the outer shell at the attached position is provided with a second mounting hole, the first mounting hole and the second mounting hole are coaxially arranged, 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 attached to the inner wall of a cabinet opening of the refrigerator, a second through hole is arranged on the cabinet opening at the attached position, the first through hole and the second through hole are coaxially arranged, and the inner diameter of the first through hole is smaller than the inner diameter of the second through hole; the knob is rotatably arranged in the second mounting hole, and the first end of the connecting shaft is vertically connected with the middle position of the knob; The cam is rotatably arranged in the strip-shaped groove, a shaft hole is formed in the middle of the cam, the second end of the connecting shaft penetrates into the shaft hole and is connected through a flat key, an annular curve-shaped groove is formed in a position, close to the edge of the cam, on one side plane of the cam, and the contour of the annular curve-shaped groove is consistent with that of the cam; The top plate is positioned in the second through hole and is in clearance fit with the second through hole, the top end of the top rod passes through the first through hole and is vertically and fixedly connected with the top plate, the bottom end of the top rod is vertically and fixedly connected with the first end of the rotating rod, and 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 arranged in the embedded box in the vertical direction, the sleeve is positioned right below the first through hole, and the ejector rod is slidably positioned in the sleeve; the cam rotates to eject the top plate from the second through hole, and the top plate ejects the sealing strip, so that an air-permeable gap is formed between the sealing strip and the counter opening matching surface.
2. 2. The apparatus of claim 1, wherein the knob protrudes from the housing of the cabinet.
3. 3. The apparatus of claim 1, wherein the top plate has a thickness not exceeding the height of the second through hole.
4. 4. The apparatus of claim 1, wherein the second mounting hole is provided in a housing on a front side of the cabinet.
5. 5. The pressure balancing device for a refrigerator according to claim 1, wherein the rear side of the pre-buried box is provided with an opening for facilitating assembly of components in the pre-buried box, and a sealing rear cover is arranged at the opening.

Description

Pressure balancing device of refrigerator Technical Field The invention relates to the technical field of refrigerators, in particular to a pressure balancing device of a refrigerator. Background The negative pressure phenomenon generally exists in the use process of the refrigerator, and the formation process is approximately as follows, after the door body is opened, the inside and the outside of the refrigerator compartment are subjected to gas exchange, external hot air enters the refrigerator compartment, after the door body is closed, the temperature of the hot air in the compartment is gradually reduced under the action of refrigeration, and the pressure in the compartment is reduced, so that the pressure difference is formed between the inside and the outside of the refrigerator. This results in a great effort being required by the user to open the door. In the prior art, a plurality of technical schemes for pressure relief to balance the pressure inside and outside the refrigerator are designed aiming at the technical problems, the most common scheme is to arrange a gas channel communicated with the space inside and outside the refrigerator so as to realize the balance of the pressure inside and outside the refrigerator, but the gas channel involved in the technical scheme has the problems that a user cannot control autonomously, cold leakage and the like, and the low temperature of the refrigerator can lead to frosting at the position of the gas channel and can cause the blockage of the gas channel for a long time, so that the air pressure balance effect is influenced. There is a need for improvements in the art. Disclosure of Invention The invention aims to provide a door opening and pressure releasing device of a refrigerator, which aims to at least solve one of the technical problems in the prior art, and adopts the following technical scheme to realize the purposes: a pressure balancing device of a refrigerator comprises a knob, a top plate and a pre-buried box, wherein a connecting shaft, a cam, a rotating rod and a push rod are arranged in the pre-buried box; The front side of the embedded box is provided with a first mounting hole, the upper side of the embedded box is provided with a first through hole, the inner wall of the lower side of the embedded box is provided with a strip-shaped groove along the left-right direction, the embedded box is fixedly arranged in a foaming layer of the cabinet body, the front side of the embedded box is attached to the inner wall of the outer shell of the cabinet body, the outer shell at the attached position is provided with a second mounting hole, the first mounting hole and the second mounting hole are coaxially arranged, 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 attached to the inner wall of a cabinet opening of the refrigerator, a second through hole is arranged on the cabinet opening at the attached position, the first through hole and the second through hole are coaxially arranged, and the inner diameter of the first through hole is smaller than the inner diameter of the second through hole; the knob is rotatably arranged in the second mounting hole, and the first end of the connecting shaft is vertically connected with the middle position of the knob; The cam is rotatably arranged in the strip-shaped groove, a shaft hole is formed in the middle of the cam, the second end of the connecting shaft penetrates into the shaft hole and is connected through a flat key, an annular curve-shaped groove is formed in a position, close to the edge of the cam, on one side plane of the cam, and the contour of the annular curve-shaped groove is consistent with that of the cam; The top plate is positioned in the second through hole and is in clearance fit with the second through hole, the top end of the top rod passes through the first through hole and is vertically and fixedly connected with the top plate, the bottom end of the top rod is vertically and fixedly connected with the first end of the rotating rod, and the second end of the rotating rod extends into the annular curved groove and can slide along the annular curved groove; the cam rotates to eject the top plate from the second through hole, and the top plate ejects the sealing strip, so that an air-permeable gap is formed between the sealing strip and the counter opening matching surface. Preferably, a sleeve is fixedly arranged in the embedded box in the vertical direction, the sleeve is positioned right below the first through hole, and the ejector rod is slidably positioned in the sleeve. Preferably, the knob protrudes out of the outer shell of the cabinet. Preferably, the thickness of the top plate does not exceed the height of the second through hole. Preferably, the second mounting hole is provided on the outer shell of the front side of the cabinet. Preferably, the rear side of the embedded bo