Refrigerator door opening automatic pressure relief device

Abstract

The invention discloses a refrigerator door opening automatic pressure relief device which comprises a linear driver, the telescopic end of the linear driver is connected with an ejector rod, axial movement of the ejector rod can be achieved, the ejector rod is of a hollow structure, a plurality of vent holes are formed in the side wall of the ejector rod, a plug body is fixedly installed at the end of the ejector rod, and a first through hole is formed in the flanging of the outer edge of a refrigerator inner container. A first sealing sleeve is fixedly installed in the first through hole, the ejector rod axially moves to enable the plug body to stretch into the first sealing sleeve, when the plug body is located in the first sealing sleeve, the plug body is tightly matched with the first sealing sleeve to play a sealing role, and when the plug body penetrates through the first sealing sleeve and the ejector rod is located in the first sealing sleeve, the plug body is tightly matched with the first sealing sleeve to play a sealing role. And external air can enter the refrigerator liner through the vent holes. In the door closing state, cold energy cannot enter the pressure relief channel, the problems of cold leakage, frosting and door opening failure are effectively prevented, the door opening pressure relief process is rapid and efficient, user operation is easy, and convenient and rapid door opening is achieved.

Description

Technical Field

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

[0002] After the refrigerator door is closed, the freezing or refrigerating compartment is in a closed state. As the temperature continues to drop, the air volume shrinks and the pressure gradually decreases, thus forming a pressure difference inside and outside the box, making it difficult to open the door or even impossible to open it. Especially for large-capacity deep-freeze refrigerators, the box will be dragged while opening the door. In order to solve the above problems in the prior art, a common solution is to set a gas channel connecting the inside and outside of the box to achieve air pressure balance inside and outside the refrigerator. However, the gas channel involved in this solution has problems such as the user's inability to control it independently and cold leakage. Moreover, low temperature will cause frost in the gas channel, which will cause the gas channel to be blocked for a long time, thereby affecting the air pressure balance effect. In view of this, it is necessary to improve the prior art. Summary of the invention

[0003] The object of the present invention is to provide a refrigerator door opening pressure relief device, which aims to solve at least one of the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned object, the technical solution adopted is as follows:

[0004] A refrigerator door opening automatic pressure relief device comprises a linear drive, the telescopic end of the linear drive is connected to a push rod, and can realize axial movement of the push rod, the push rod is a hollow structure, the side wall of the push rod is provided with a plurality of ventilation holes, the end of the push rod is fixedly installed with a plug body, the outer edge flange of the refrigerator inner tank is provided with a first through hole, a first sealing sleeve is fixedly installed in the first through hole, the axial movement of the push rod can make the plug body extend into the first sealing sleeve, when the plug body is located in the first sealing sleeve, the plug body and the first sealing sleeve are closely matched to play a sealing role, when the plug body passes through the first sealing sleeve and the push rod is located in the first sealing sleeve, external air can enter the refrigerator inner tank through the ventilation holes.

[0005] Preferably, a second through hole is provided on the inner lining plate of the refrigerator door, a second sealing sleeve is fixedly installed in the second through hole, a pressure relief block is fixedly installed in the foaming layer of the refrigerator door, a first channel and a second channel are provided in the pressure relief block, one end of the first channel is butt-jointed with and communicated with the second sealing sleeve, a sealing cover body is provided at the other end of the first channel, one end of the second channel is butt-jointed with the side wall of the first channel and communicated with the first channel, the other end of the second channel is located at the bottom of the refrigerator door and communicated with the outside, a plug is slidably provided in the first channel, a spring is connected between the plug and the sealing cover body, under the natural action of the spring, the plug is extended into the second sealing sleeve and seals the second sealing sleeve, and at the same time, the joint between the first channel and the second channel is blocked, and when the refrigerator door is closed, the push rod moves axially, the plug body can pass through the second sealing sleeve, extend into the first channel, and push the plug to move, and when it moves to a suitable position, outside air can enter the refrigerator inner tank.

[0006] Preferably, the first channel and the second channel are arranged vertically.

[0007] Preferably, when the refrigerator door is in a closed state, the push rod, the first sealing sleeve, the second sealing sleeve and the first channel are coaxially arranged.

[0008] Preferably, the outer diameter of the push rod is smaller than the inner diameter of the first sealing sleeve, and the inner diameter of the first sealing sleeve is smaller than the inner diameter of the second sealing sleeve.

[0009] Preferably, the device further comprises a controller and a door opening sensing module, the controller is electrically connected to the linear drive, the door opening sensing module is arranged on the refrigerator door body, and the door opening sensing module is electrically connected to the controller.

[0010] Preferably, the door opening sensing module is a physical button, a vibration sensor or a voice recognition sensor.

[0011] Preferably, the linear drive is an electric push rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The invention discloses an automatic pressure relief device for opening the refrigerator door. When the door is closed, cold energy will not enter the pressure relief channel, thereby effectively preventing problems such as cold leakage, frost and inability to open the door. The pressure relief process for opening the door is rapid and efficient, and the user operation is simple, thereby realizing convenient and fast door opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The invention is a schematic diagram of an automatic pressure relief device installed in a refrigerator according to an embodiment of the present invention.

[0016] Figure 2 It is an exploded view of the automatic pressure relief device of Example 1.

[0017] Figure 3 This is a schematic diagram of the automatic pressure relief device of Example 2 installed in a refrigerator.

[0018] Figure 4 It is an exploded view of the automatic pressure relief device of the second embodiment.

[0019] Figure 5 It is a cross-sectional view of the pressure relief block of the second embodiment.

[0020] In the figure: 1. electric push rod; 2. refrigerator liner; 3. push rod; 4. vent; 5. plug body; 6. first through hole; 7. first sealing sleeve; 8. inner lining plate; 9. second through hole; 10. second sealing sleeve; 11. pressure relief block; 12. first channel; 13. second channel; 14. sealing cover; 15. plug; 16. spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1

[0024] like Figure 1 to Figure 2 As shown, a preferred embodiment of the present invention provides an automatic pressure relief device for opening a refrigerator door.

[0025] The device includes a linear drive, specifically, the linear drive adopts an electric push rod 1, the electric push rod 1 is installed below the refrigerator inner tank 2 and behind the outer edge flange of the refrigerator inner tank 2, the telescopic end of the electric push rod 1 is connected with a push rod 3, and the electric push rod 1 can drive the push rod 3 to move axially. The push rod 3 is a cylindrical hollow structure, and the side wall of the push rod 3 is evenly provided with a plurality of vent holes 4, and a plug body 5 is fixedly installed at the end of the push rod.

[0026] A first through hole 6 is provided on the outer flange of the refrigerator inner container 2 , in which a first sealing sleeve 7 is fixedly installed. The push rod 3 is coaxially arranged with the first sealing sleeve 7 , and the outer diameter of the push rod 3 is smaller than the inner diameter of the first sealing sleeve 7 .

[0027] The device also includes a controller and a door opening sensing module. The controller is electrically connected to the electric push rod 1, and the controller is used to control the extension and retraction of the electric push rod 1. The door opening sensing module is installed on the refrigerator door body and is electrically connected to the controller. The door opening sensing module is a physical button, a vibration sensor or a voice recognition sensor, which is used to sense the door opening information sent by the user and transmit it to the controller.

[0028] When the refrigerator door is closed, the electric push rod 1 is in the initial state. At this time, the plug body 5 is located in the first sealing sleeve 7, and the plug body 5 and the first sealing sleeve 7 are closely matched to play a sealing role, and the outside air cannot enter the refrigerator inner tank 2.

[0029] Door opening pressure relief process: The user sends a door opening message, such as pressing a physical button, tapping the corresponding sensing area, or sending a set voice command. The controller controls the electric push rod 1 to move and drives the push rod 3 to move axially forward. When the plug 5 passes through the first sealing sleeve 7 and the push rod 3 is located in the first sealing sleeve 7, the electric push rod 1 stops moving. At this time, the external air enters the refrigerator liner 2 through the vent 4 on the push rod 3 to balance the air pressure. After 1-2 seconds (this time can be set), the controller controls the electric push rod 1 to move in the opposite direction and drives the push rod 3 to move axially backward to return to the initial state. After that, the user can easily open the refrigerator door.

[0030] Embodiment 2

[0031] like Figures 3 to 5 As shown, the preferred embodiment of the present invention also provides a refrigerator door opening automatic pressure relief device, which is further configured as follows based on the above embodiment 1:

[0032] A second through hole 9 is provided on the inner lining plate 8 of the refrigerator door, and a second sealing sleeve 10 is fixedly installed in the second through hole 9. The inner diameter of the first sealing sleeve 7 is smaller than the inner diameter of the second sealing sleeve 10. When the refrigerator door is in the closed state, the first sealing sleeve 7 and the second sealing sleeve 10 are separated and coaxially arranged.

[0033] A pressure relief block 11 is fixedly installed in the foaming layer of the refrigerator door, and a first channel 12 and a second channel 13 are arranged in the pressure relief block 11. One end of the first channel 12 is connected to and communicated with the second sealing sleeve 10. The second sealing sleeve 10 and the first channel 12 are coaxially arranged, and the inner diameter of the second sealing sleeve 10 is the same as that of the first channel 12. A sealing cover 14 is arranged at the other end of the first channel 12. The first channel 12 and the second channel 13 are arranged vertically, one end of the second channel 13 is connected to the side wall of the first channel 12 and communicated with the first channel 12, and the other end of the second channel 13 is located at the bottom of the refrigerator door and communicated with the outside. A plug 15 is slidably arranged in the first channel 12, and a spring 16 is connected between the plug 15 and the sealing cover 14.

[0034] When the refrigerator door is closed, the spring 16 is in a natural state. At this time, under the natural action of the spring 16, the plug 15 extends into the second sealing sleeve 10 and seals the second sealing sleeve 10, while blocking the joint between the first channel 12 and the second channel 13, so that outside air cannot enter the refrigerator inner tank 2 through the first channel 12 and the second channel 13.

[0035] Door opening pressure relief process: When the user sends a door opening message, the controller controls the electric push rod 1 to move, and drives the push rod 3 to move forward axially. The plug 5 passes through the first sealing sleeve 7 and the second sealing sleeve 10 in turn, extends into the first channel 12, and pushes the plug 15 to move forward along the first channel 12, thereby compressing the spring 16. When the plug 5 moves to a suitable position, that is, to ensure that the first channel 12 and the second channel 13 are connected, the outside air will enter the refrigerator liner 2 through the second channel 13, the first channel 12 and the second sealing sleeve 10 in turn to balance the air pressure. After 1-2 seconds (this time can be set), the controller controls the electric push rod 1 to move in the opposite direction and return to the initial state, and the spring 16 returns to the natural state. After that, the user can easily open the refrigerator door.

[0036] In summary, in the automatic pressure relief device for opening the refrigerator door described in the embodiment of the present invention, when the door is closed, cold air will not enter the pressure relief channel, effectively preventing problems such as cold leakage, frost, and inability to open the door. The door opening pressure relief process is rapid and efficient, and the user operation is simple, thereby achieving convenient and fast door opening.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic pressure relief device for opening the refrigerator door, characterized in that: It includes a linear drive, the telescopic end of the linear drive is connected to a push rod, and can realize axial movement of the push rod, the push rod is a hollow structure, the side wall of the push rod is provided with a plurality of ventilation holes, the end of the push rod is fixedly installed with a plug body, a first through hole is provided on the outer edge flange of the refrigerator inner tank, a first sealing sleeve is fixedly installed in the first through hole, the axial movement of the push rod can make the plug body extend into the first sealing sleeve, when the plug body is located in the first sealing sleeve, the plug body and the first sealing sleeve are tightly matched to play a sealing role, when the plug body passes through the first sealing sleeve and the push rod is located in the first sealing sleeve, external air can enter the refrigerator inner tank through the ventilation holes.

2. The automatic pressure relief device for opening the refrigerator door according to claim 1, characterized in that: A second through hole is provided on the inner lining plate of the refrigerator door, a second sealing sleeve is fixedly installed in the second through hole, a pressure relief block is fixedly installed in the foaming layer of the refrigerator door, a first channel and a second channel are provided in the pressure relief block, one end of the first channel is connected to and communicated with the second sealing sleeve, a sealing cover body is provided at the other end of the first channel, one end of the second channel is connected to the side wall of the first channel and is communicated with the first channel, the other end of the second channel is located at the bottom of the refrigerator door and is communicated with the outside, a plug is slidably provided in the first channel, a spring is connected between the plug and the sealing cover body, under the natural action of the spring, the plug is extended into the second sealing sleeve and seals the second sealing sleeve, and at the same time, the joint between the first channel and the second channel is blocked, when the refrigerator door is closed, the push rod moves axially, the plug body can pass through the second sealing sleeve, extend into the first channel, and push the plug to move, when it moves to a suitable position, outside air can enter the refrigerator inner tank.

3. The automatic pressure relief device for opening the refrigerator door according to claim 2, characterized in that: The first channel and the second channel are arranged vertically.

4. The automatic pressure relief device for opening the refrigerator door according to claim 2, characterized in that: When the refrigerator door is in a closed state, the push rod, the first sealing sleeve, the second sealing sleeve and the first channel are coaxially arranged.

5. The automatic pressure relief device for opening the refrigerator door according to claim 2, characterized in that: The outer diameter of the push rod is smaller than the inner diameter of the first sealing sleeve, and the inner diameter of the first sealing sleeve is smaller than the inner diameter of the second sealing sleeve.

6. The automatic pressure relief device for opening a refrigerator door according to any one of claims 1 to 5, characterized in that: The device also includes a controller and a door opening sensing module. The controller is electrically connected to the linear driver. The door opening sensing module is arranged on the refrigerator door body. The door opening sensing module is electrically connected to the controller.

7. The automatic pressure relief device for opening a refrigerator door according to any one of claim 5, characterized in that: The door opening sensing module is a physical button, a vibration sensor or a voice recognition sensor.

8. The automatic pressure relief device for opening the refrigerator door according to claim 1, characterized in that: The linear drive is an electric push rod.

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