Push switch and refrigerator comprising same

Abstract

The utility model provides a push switch and a refrigerator comprising the same. A shell of the push switch is connected with the switch support to form a containing cavity in a surrounding mode. The containing cavity comprises an inner cavity used for receiving air pressure changes. The switch assembly is arranged in the containing cavity and can switch the on-off state according to the air pressure change in the inner cavity. A channel is arranged in the shell, the channel is communicated with the inner cavity and an external pressed space, the pressed space is extruded to generate air pressure change, and the air pressure change is transmitted to the inner cavity through the channel. The push switch is simple in structure, controls on-off in a pressing mode, is sensitive, is not liable to touch by mistake, and is good in operation experience. The external compression space is used as a direct control part, the arrangement position and form of the external compression space are freer, and the external compression space can be hidden and is more attractive. In addition, the switch support is provided with a pressure relief through hole communicated with the containing cavity and the atmosphere so that the containing cavity can exhaust and relieve pressure in real time, the internal air pressure needing to be overcome during extrusion is reduced, and operation is more labor-saving.

Description

Technical Field

[0001] The utility model relates to the field of refrigerators, in particular to a push switch and a refrigerator comprising the same. Background Art

[0002] In order to prevent cold air from leaking out, refrigerators usually use door seals to achieve a good sealing effect. This causes the door seal to have a large suction force, and a certain negative pressure will be formed in the refrigerator during refrigeration, so a large torque is required to open the door. Traditional refrigerator doors are opened and closed by manually pushing and pulling the door body, which has the disadvantage of being laborious to operate.

[0003] Many refrigerators on the market today use touch switches to control the opening and closing of the door. A touch switch generally refers to a switch designed using the principle of a touch sensing chip. It is a replacement product for traditional mechanical push-button switches. Touch switches are widely used because of their intelligent operation. The principle of a touch switch is to transmit instructions to the chip through the fluctuation of capacitance or resistance generated by a part of the human body (such as a finger) approaching the switch, and the chip controls the switch circuit to achieve the purpose of turning the appliance on or off. However, there are the following problems when using a touch switch with a refrigerator:

[0004] (1) After long-term use, the touch buttons are easily damaged and malfunction, and are difficult to repair;

[0005] (2) Its practicality and user experience are inferior to those of mechanical buttons. The touch switch is often located in a part of the refrigerator door and needs to be touched at a specific small button position, which is not easy to control. The touch setting is prone to accidental touches.

[0006] (3) It does not conform to the habit of pressing the door to open, and the user experience is not good;

[0007] (4) The button position must be indicated in a specific area of ​​the door body and cannot be hidden, which is not simple and beautiful.

[0008] In addition to the aforementioned popular touch switches, there are some new switches that are improved based on the physical breaking mechanism in the traditional mechanical switch, such as pressure switches.

[0009] The working principle of a pressure switch is that when the fluid pressure is higher or lower than the rated pressure value, the switch contacts are actuated. Its main function is to monitor the fluid pressure, that is, to trigger the switch when the pressure level reaches the set limit. Pressure switches are widely used and play a key role in various fields such as industrial automation, household appliances, hydraulic / pneumatic systems, and medical equipment. However, pressure switches are generally used for passive detection of gas or liquid pressure and cannot be manually operated or pressed. Utility Model Content

[0010] The technical problem to be solved by the utility model is to overcome the defects of the prior art that the switch is easy to be accidentally touched, the operating experience is poor, the setting cannot be hidden, the appearance is not beautiful, the operation is not labor-saving enough, and the maintenance is inconvenient, and provide a push switch and a refrigerator containing the same.

[0011] The utility model solves the above technical problems through the following technical solutions:

[0012] A push switch, comprising: a housing, a switch bracket, a switch assembly, a channel, and a pressure relief through hole;

[0013] The housing and the switch bracket are connected to form a receiving cavity, wherein the receiving cavity includes an inner cavity, and the inner cavity is used to receive air pressure changes;

[0014] The switch assembly is located in the accommodating cavity, and the switch assembly can switch the on and off state according to the change of the air pressure in the inner cavity;

[0015] The channel is arranged in the shell, connecting the inner cavity with an external pressurized space, the pressurized space is used to be squeezed to compress the space, thereby generating air pressure changes, and the channel is used to transmit the air pressure changes to the inner cavity;

[0016] The pressure relief through hole is arranged on the switch bracket, and the pressure relief through hole communicates with the accommodating cavity and the atmosphere.

[0017] In the present solution, an inner cavity is formed by connecting the shell and the switch bracket, and the push switch can switch the on and off state according to the change of air pressure in the inner cavity, and the structure is simple; the opening and closing is controlled by pressing, which is not easy to be accidentally touched compared to the touch switch, and combines the advantages of the push switch and the air pressure switch, which is sensitive and has a better operating experience; the external pressurized space is used as the direct control part, and its setting position and form are more flexible, and it can be hidden, which is more beautiful; the switch bracket is provided with a pressure relief hole connecting the accommodating cavity and the atmosphere so that the accommodating cavity can be exhausted and depressurized immediately, thereby reducing the internal air pressure to be overcome during squeezing, and the operation is more labor-saving.

[0018] Preferably, the switch assembly comprises a conductive sheet, which is arranged between the inner cavity and the switch bracket and is used as a moving end of the switch, and the conductive sheet can be deformed according to the change of the air pressure in the inner cavity;

[0019] When the air pressure changes in the inner cavity, the conductive sheet is elastically deformed by the air pressure and bulges toward the side close to the switch bracket to a preset deformation position;

[0020] When the air pressure in the inner cavity returns to its initial level, the conductive sheet loses the agitation of the air pressure and returns to its original position.

[0021] In this solution, a conductive sheet is used to visualize the air pressure change as deformation, which is more intuitive. The conductive sheet can not only sensitively reflect the air pressure change, but also conduct electricity to serve as the moving end of the switch. It is hidden inside the switch, occupies a small volume, and simplifies the switch structure.

[0022] Preferably, the switch assembly comprises an electric contact sheet, which is arranged on the side of the switch bracket close to the conductive sheet, and is used as a fixed end of the switch, and is used to contact or separate from the conductive sheet according to the deformation of the conductive sheet;

[0023] When the conductive sheet is in the preset deformation position, the conductive sheet can contact the electrical contact sheet, so that the switch is closed;

[0024] When the conductive sheet returns to the original position, the conductive sheet can be separated from the electrical contact sheet, so that the switch is disconnected.

[0025] In this solution, the contact or separation between the conductive sheet and the electric contact sheet is used as the direct control part of the switch on and off. The structure is simple, and the elastic deformation of the conductive sheet itself is used to rebound and disconnect. This control method is more sensitive, resets quickly, has low switch loss and long service life.

[0026] Preferably, a deformation space is left between the switch bracket and the conductive sheet, and the deformation space is connected to the atmosphere through the pressure relief through hole.

[0027] In this solution, deformation space is reserved for the conductive sheet so that the conductive sheet can be deformed smoothly without being hindered by the switch bracket; a pressure relief through hole is provided to exhaust and relieve pressure from the compressed deformation space, so as to reduce the air pressure resistance to which the conductive sheet is subjected during the deformation process, thereby reducing the reaction force that the user needs to overcome when performing a pressing operation, making the operation more labor-saving.

[0028] Preferably, the conductive sheet is connected to a first conductive line, the electrical contact sheet is connected to a second conductive line, and the first conductive line and the second conductive line are used to connect to an external device.

[0029] In this solution, the actual usage scenarios of the switch are taken into consideration, and external wires are connected to the conductive sheet and the electrical contact sheet to facilitate the connection of external devices to meet more complex usage requirements.

[0030] Preferably, the housing comprises a step structure, and the step structure is used to install and fix the conductive sheet;

[0031] And / or, the switch assembly comprises an elastic seal, and the elastic seal is arranged at the connection between the conductive sheet and the housing;

[0032] And / or, the switch assembly includes an isolating member, and the isolating member is arranged between the conductive sheet and the switch bracket.

[0033] In the present solution, by setting a step structure, it is convenient to support the conductive sheet and realize the positioning of the conductive sheet, which is beneficial to prevent the conductive sheet from shifting, making the switch structure more stable, and the conductive sheet is not easy to shift or reduce sensitivity during repeated deformation and resetting; the elastic sealing member can adapt to the deformation of the conductive sheet and produce passive elastic deformation, so that when the conductive sheet deforms between the preset deformation position and the original position, the shell and the conductive sheet always maintain a sealed connection to prevent air leakage and ensure the sensitivity of the switch; by setting an isolating member, when the conductive sheet is restored to its original position, it can be separated from the electric contact sheet, and a deformation space is separated between the conductive sheet and the switch bracket to form an unimpeded deformation space for the conductive sheet.

[0034] A refrigerator comprises a box body, a door body and the above-mentioned push switch, wherein the box body and the door body enclose a pressurized space, and the box body and / or the door body serve as a pressurized part, and the pressurized part is used to compress the pressurized space under the action of external force.

[0035] In the present solution, the cabinet and / or door structure originally contained in the refrigerator is used as the pressure-bearing part, the actual operating range of the user is greatly increased, the user experience is better, and the pressing operation is more in line with the general user's habit of pressing to open the door than the touch operation, and is not easy to touch by mistake; the internal space enclosed by the cabinet and the door is used as the pressure-bearing space, the channel can be connected to the interior of the refrigerator and the switch can be hidden at the same time, which is more beautiful, and its setting position and form are more free; the switch is controlled by the structure of the refrigerator itself, and there is no need to set up an additional pressure-bearing part or pressure space, the structure is simple, and this switch has good structural adaptability to the refrigerator.

[0036] Preferably, the push switch is arranged in the box, and the channel is directly connected to the pressurized space.

[0037] In this solution, by directly arranging the push switch in the box, it is ensured that the air pressure change in the box can be reflected in the switch, and the connection between the channel and the box does not need to be sealed.

[0038] Preferably, the push switch is arranged outside the box, the channel extends into the pressurized space to communicate therewith, and a sealing device is provided at the connection between the channel and the pressurized space.

[0039] In this solution, the push switch is arranged outside the box, and its arrangement form is more flexible. The channel is extended into the box and a sealing device is provided at the connection between the channel and the pressurized space to prevent air leakage from affecting the use effect of the switch, thereby ensuring the pressing sensitivity of the switch.

[0040] Preferably, the channel passes through the thermal insulation foam layer of the box body and extends into the pressurized space to communicate therewith, and the thermal insulation foam layer is used to seal the connection between the channel and the pressurized space.

[0041] In this solution, a channel is extended from the heat-insulating foam layer of the refrigerator into the box body, and the heat-insulating foam layer can be used as a seal to seal the connection between the channel and the pressurized space, without the need for an external seal, and the structure is simpler.

[0042] The positive and progressive effects of the utility model are: an inner cavity is formed by connecting the shell and the switch bracket, and the push switch can switch the on and off state according to the change of air pressure in the inner cavity, and the structure is simple; the opening and closing is controlled by pressing, which is sensitive and not easy to be touched by mistake, and the operating experience is good; the external pressurized space is used as the direct control part, and its setting position and form are more free, and it can be hidden and more beautiful; the switch bracket is provided with a pressure relief hole connecting the accommodating cavity and the atmosphere so that the accommodating cavity can be exhausted and depressurized immediately, thereby reducing the internal air pressure that needs to be overcome during squeezing, and the operation is more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a three-dimensional structural exploded diagram of a push switch according to an embodiment of the present utility model;

[0044] Figure 2 A cross-sectional view of a housing of a push switch according to an embodiment of the present utility model;

[0045] Figure 3 A cross-sectional view of a push switch according to an embodiment of the present invention;

[0046] Figure 4 A detailed view of a conductive sheet of a push switch according to an embodiment of the present invention;

[0047] Figure 5 A detailed view of the upper surface of a switch bracket of a push switch according to an embodiment of the utility model;

[0048] Figure 6 This is a detailed view of the lower surface of a switch bracket of a push switch according to an embodiment of the utility model.

[0049] Description of Reference Numerals

[0050] Shell 1

[0051] Step structure 11

[0052] Switch bracket 2

[0053] Second wire 21

[0054] Pressure relief hole 22

[0055] Accommodating chamber 3

[0056] Lumen 31

[0057] Channel 4

[0058] Conductive sheet 5

[0059] First conductor 51

[0060] Electrical contact 6

[0061] Elastic sealing ring 7

[0062] Gasket 8

[0063] Sealing ring 9 DETAILED DESCRIPTION

[0064] The present invention will be described more clearly and completely below through an embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

[0065] Figure 1 This is a three-dimensional structural exploded diagram of a push switch according to an embodiment of the present invention. As shown in the exploded diagram, the main components of the push switch include a housing 1, a switch bracket 2, and a switch assembly. Among them:

[0066] The housing 1 and the switch bracket 2 are connected to form an internal accommodating chamber 3, and the accommodating chamber 3 includes an inner chamber 31, and the inner chamber 31 is used to receive air pressure changes. The detachable connection between the housing 1 and the switch bracket 2 is easier to disassemble or repair;

[0067] In this embodiment, a detachable connection is selected between the housing 1 and the switch bracket 2, which is convenient for disassembly or maintenance. However, in actual implementation, it can also be replaced with a non-detachable connection, and this adjustment will not affect the main technical effect of the housing 1 and the switch bracket 2 enclosing the internal accommodating cavity 3.

[0068] The switch assembly is located in the accommodating cavity 3, and the switch assembly can switch the on and off state according to the change of the air pressure in the inner cavity 31; the overall structure of the switch is simple.

[0069] like Figure 2 As shown, a channel 4 is also provided in the housing 1, and the channel 4 connects the inner cavity 31 with the external pressurized space. For example, the left end of the channel 4 connects the accommodating cavity 3, and the right end connects the external pressurized space. The pressurized space is used to be squeezed to compress the space, thereby generating air pressure changes, and is used to transfer the air pressure changes in the pressurized space to the inner cavity of the accommodating cavity 3. The utility model uses the external pressurized space as the direct control part, and the user can control the switch component by squeezing the pressurized space. Compared with the touch switch, the pressing operation of this control method is more in line with the user habits, and it is not easy to touch by mistake. The setting position and form of the pressurized space and the press switch are more free, and can be hidden, which is more beautiful.

[0070] In addition, the switch bracket 2 is also provided with a pressure relief hole 22, which is provided on the switch bracket and connects the accommodating chamber 3 with the atmosphere, so as to allow the compressed accommodating chamber 3 to be exhausted and depressurized, thereby reducing the internal air pressure that the user needs to overcome during operation, and making the operation more labor-saving. Figure 5 , Figure 6 As shown, in this embodiment, the switch bracket 2 has two pressure relief holes 22 . In actual implementation, the number of the two pressure relief holes 22 can be adjusted according to the size of the accommodating cavity 3 .

[0071] Figure 3 FIG. 1 is a cross-sectional view of a push switch according to an embodiment of the present invention, showing the composition structure of the switch assembly, wherein the switch assembly includes a conductive sheet 5. Figure 3 As shown, the conductive sheet 5 is disposed between the inner cavity 31 and the switch bracket 2, and is used to receive the air pressure change transmitted from the channel 4 to the inner cavity 31, and the conductive sheet 5 can be deformed according to the air pressure change in the inner cavity 31;

[0072] (1) When the air pressure changes in the inner cavity 31, the conductive sheet 5 is elastically deformed by the air pressure and bulges toward the side close to the switch bracket 2 to a preset deformation position;

[0073] (2) When the air pressure in the inner cavity 31 returns to its initial level, the conductive sheet 5 loses the agitation of the air pressure and returns to its original position.

[0074] The utility model utilizes the conductive sheet 5 to visualize the air pressure change as deformation. The conductive sheet 5 can not only sensitively reflect the air pressure change, but also conduct electricity to serve as the moving end of the switch. Moreover, the conductive sheet 5 is hidden inside the switch as a key switch component, occupies a small volume, and simplifies the switch structure.

[0075] When the conductive sheet 5 is agitated by the air pressure in the inner cavity 31, it bulges upward to a preset deformation position. The switch assembly in this embodiment also includes an electric contact sheet 6, which is used to contact and reflect the deformation of the conductive sheet 5 to turn on the switch. Figure 4 As shown, the conductive sheet 5 is the moving end of the switch, and can change shape according to the user's operation. The electric contact sheet 6 is the fixed end of the switch, and should be set at the preset deformation position of the conductive sheet 5 to ensure contact with the conductive sheet 5.

[0076] The contact or separation between the conductive sheet 5 and the electric contact sheet 6 is used as the direct control part of the switch on and off. The structure is simple, and the elastic deformation of the conductive sheet 5 itself is used to rebound and disconnect. This control method is more sensitive, resets quickly, has small switch loss, and has a long service life. In other alternative embodiments, the electric contact sheet 6 may not be provided, but other components that can detect and reflect the deformation of the conductive sheet 5 may be selected, such as providing a position sensor to monitor the position change of a certain point on the surface of the conductive sheet 5. When the conductive sheet 5 bulges upward to a preset deformation position, the position sensor can also reflect its deformation and send a signal to control the switch on and off. Adjustment of this type of implementation will not result in the loss of the key technical effect of switching the switch on and off according to the deformation of the conductive sheet 5.

[0077] like Figure 3 As shown, the electric contact piece 6 is installed on the lower surface of the switch bracket 2. The conductive sheet 5 divides the accommodating chamber 3 into two parts, the lower part is the inner cavity 31, and the upper part is the deformation space. The deformation space is used to reserve a position for the agitation deformation of the conductive sheet 5. The switch bracket 2 seals the opening of the shell 1, the upper surface corresponds to the outside of the switch, and the lower surface corresponds to the deformation space. The aforementioned pressure relief through hole 22 connects the deformation space with the atmosphere. By reserving a deformation space for the conductive sheet 5, the conductive sheet 5 can be deformed smoothly without being hindered by the switch bracket 2; by providing a pressure relief through hole to exhaust and relieve pressure on the compressed deformation space, the air pressure resistance of the conductive sheet during the deformation process can be reduced, thereby reducing the reaction force that the user needs to overcome when pressing, and the operation is more labor-saving.

[0078] In addition, since the conductive sheet 5 and the electrical contact sheet 6 are hidden inside the switch, considering the electrical connection requirements of the switch, such as Figure 4 As shown, a first conductor 51 is connected to the conductive sheet 5, and the first conductor 51 is used to connect to external facilities, such as Figure 5 As shown, the outer surface of the switch bracket 2 is provided with a second wire 21 connected to the electric contact sheet 6, and the second wire 21 is used to connect to an external push switch signal receiving device, such as a main control board. The first wire 51 and the second wire 21 are preset for the switch to facilitate connection with an external device, thereby realizing convenient installation of the switch in the refrigerator.

[0079] Since the conductive sheet 5 needs to be deformed to realize the switch function, in order to reinforce the conductive sheet 5 and prevent displacement, the utility model sets a step structure 11 on the housing 1, such as Figure 3 As shown, the conductive sheet 5 is arranged at the step structure 11, so that the switch structure is more stable, and the conductive sheet is not easily displaced or the sensitivity is reduced during repeated deformation and resetting.

[0080] At the same time, in order to further strengthen and ensure that the conductive sheet 5 can be deformed smoothly, the utility model also provides an elastic seal, such as Figure 3 As shown, in this embodiment, an elastic sealing ring 97 is selected as an elastic sealing member, and is arranged at the connection between the conductive sheet 5 and the shell 1 in conjunction with the conductive sheet 5, so as to adapt to the deformation of the conductive sheet 5 and produce passive elastic deformation, so that when the conductive sheet 5 is deformed between the preset deformation position and the original position, the shell 1 and the conductive sheet 5 always maintain a sealed connection to prevent air leakage and ensure the sensitivity of the switch.

[0081] In addition, in this embodiment, a spacer is also provided, such as Figure 3 As shown, a gasket 8 is selected as an isolating member and is disposed in the deformation space between the conductive sheet 5 and the bracket, so as to separate the conductive sheet 5 from the electric contact sheet 6 when the conductive sheet 5 returns to its original position.

[0082] In the actual implementation process, other structures can also be selected as isolation parts and elastic seals, such as replacing the gasket 8 with the sealing ring 9, or replacing the elastic sealing ring 97 with a sealing strip. This adjustment of the implementation method will not lead to the loss of key technical effects.

[0083] In the present embodiment, a circular conductive sheet 5 is selected, a ring-shaped gasket 8 is selected as the isolating member, a ring-shaped elastic sealing ring 97 is selected as the elastic sealing member, and a circular switch bracket 2 and a shell 1 with a circular opening are selected. The "circular" and "ring-shaped" structures are designed based on the principle of mutual cooperation of various components during the assembly process. When selecting the shape of the conductive sheet 5, it is mainly considered that it will be subjected to unilateral air pressure agitation during use, and the maximum deformation position is generally located at the center of the circle, that is, its preset deformation position is easier to predict, which is convenient for the position setting of its related components. Therefore, a circular conductive sheet 5 is selected, and the switch bracket 2, isolating member, elastic sealing member, shell 1 and sealing ring 9 assembled with it are also correspondingly set to the aforementioned shape. Figure 5 and Figure 6 The upper and lower surfaces of the switch bracket 2 of the push switch of an embodiment of the utility model are detailed. Figure 6 As shown, according to the deformation of the circular conductive sheet 5 , the electric contact sheet 6 is arranged at the center of the switch bracket 2 .

[0084] In other alternative embodiments, other shapes of the conductive sheet 5 may be selected, such as square, strip, etc., and the shapes of the aforementioned components assembled therewith should also be adjusted accordingly. The shape change of the conductive sheet 5 will affect the surface force when it is agitated by unilateral air pressure, resulting in the possibility of changing the specific deformation. When the shapes of the components are adjusted, the key technical effect of the deformation of the conductive sheet 5 caused by air pressure agitation will not be lost while ensuring that the deformation of the conductive sheet 5 is not hindered.

[0085] This embodiment also discloses a refrigerator, which includes the above-mentioned push switch. A refrigerator generally includes a door body and a box body. The utility model uses the internal space of the box body as the external pressure-bearing space of the push switch. When the user presses the door body or the box body, the internal space of the box body can be compressed without the need to set up an additional pressure-bearing part or pressure-bearing space. In addition, the actual operable range of the user is greatly increased, the user experience is better, and the press operation is more in line with the general user's habit of pressing to open the door than the touch operation, and is not easy to touch by mistake.

[0086] The push switch can be arranged at a position relative to the refrigerator body:

[0087] (1) The push switch is arranged inside the box, so that the channel 4 is directly connected to the inside of the box, and there is no need to add a seal outside the housing 1, nor is there any need to specially design the shape of the channel 4;

[0088] (2) If the push switch is set outside the box, the shape of the channel 4 needs to be adjusted to connect to the inside of the box. The adjustment method can be to set the channel 4 as a curved pipe as needed, or to select a longer channel 4 to extend into the pressurized space. Correspondingly, the shape of the shell 1 should also be adjusted to match the shape of the channel 4. This setting method connects the inner cavity 31 with the push space by specially designing the shape of the channel 4, so that the setting form of the push switch body is more flexible.

[0089] When the push switch is set outside the box, the sealing problem needs to be considered. The connection between channel 4 and the pressurized space needs to be sealed to prevent gas leakage and reduce the sensitivity of the switch. Figure 2 , Figure 3 As shown, by setting a sealing ring 9 outside the housing 1 of the channel 4, adjusting the external shape of the housing 1, and setting a limit groove to install the sealing ring 9, a sealing effect can be achieved, thereby ensuring the pressing sensitivity of the switch. Alternatively, by taking advantage of the fact that a heat preservation foam layer is generally provided in the compartment of the refrigerator body, the channel 4 is inserted into the box body through the heat preservation foam layer, and the heat preservation foam layer can be used to seal the extrusion of the channel 4, without the need for an external seal, and the structure is simpler.

[0090] In the description of this embodiment, the directions indicated by the selected directional words "upper", "lower", "left", and "right" are based on the directions shown in the drawings of the specification. The indicated directions are only used to simplify the description of the utility model, and are not used as specific directions for actual installation and use, and therefore are not used as limitations on the utility model.

[0091] Those skilled in the art may make various adjustments to the implementation methods thereof without departing from the principle and essence of the present invention. This embodiment is only an example of the application scenario of the push switch. When implementing the present invention, those skilled in the art should understand that in addition to being able to realize the function of controlling the refrigerator door as described above, it can also realize other functions including but not limited to weighing, nitrogen start and stop control of the nitrogen preservation sealing device, etc. The above-mentioned exemplified adjusted implementation methods all fall within the protection scope of the present invention and will not result in the loss of key technical effects.

Claims

1. A push switch, characterized in that: The push switch comprises: a housing, a switch bracket, a switch assembly, a channel, and a pressure relief through hole; The housing and the switch bracket are connected to form a receiving cavity, wherein the receiving cavity includes an inner cavity, and the inner cavity is used to receive air pressure changes; The switch assembly is located in the accommodating cavity, and the switch assembly can switch the on and off state according to the change of the air pressure in the inner cavity; The channel is arranged in the shell, connecting the inner cavity with an external pressurized space, the pressurized space is used to be squeezed to compress the space, thereby generating air pressure changes, and the channel is used to transmit the air pressure changes to the inner cavity; The pressure relief through hole is arranged on the switch bracket, and the pressure relief through hole communicates with the accommodating cavity and the atmosphere.

2. The push switch according to claim 1, wherein: The switch assembly includes a conductive sheet, which is disposed between the inner cavity and the switch bracket and is used as a moving end of the switch, and the conductive sheet can be deformed according to the change of the air pressure in the inner cavity; When the air pressure changes in the inner cavity, the conductive sheet is elastically deformed by the air pressure and bulges toward the side close to the switch bracket to a preset deformation position; When the air pressure in the inner cavity returns to its initial level, the conductive sheet loses the agitation of the air pressure and returns to its original position.

3. The push switch according to claim 2, wherein: The switch assembly includes an electric contact sheet, which is arranged on the side of the switch bracket close to the conductive sheet, and is used as a fixed end of the switch, and is used to contact or separate from the conductive sheet according to the deformation of the conductive sheet; When the conductive sheet is in the preset deformation position, the conductive sheet can contact the electrical contact sheet, so that the switch is closed; When the conductive sheet returns to the original position, the conductive sheet can be separated from the electrical contact sheet, so that the switch is disconnected.

4. The push switch according to claim 3, wherein: A deformation space is left between the switch bracket and the conductive sheet, and the deformation space is connected to the atmosphere through the pressure relief through hole.

5. The push switch according to claim 3, characterized in that: The conductive sheet is connected to a first conductive line, the electrical contact sheet is connected to a second conductive line, and the first conductive line and the second conductive line are used to connect to an external device.

6. The push switch according to claim 2, wherein: The housing comprises a step structure, and the step structure is used to install and fix the conductive sheet; And / or, the switch assembly comprises an elastic seal, and the elastic seal is arranged at the connection between the conductive sheet and the housing; And / or, the switch assembly includes an isolating member, and the isolating member is arranged between the conductive sheet and the switch bracket.

7. A refrigerator, characterized in that: It comprises a box body, a door body and a push switch as described in any one of claims 1-6, wherein the box body and the door body enclose a pressurized space, and the box body and / or the door body serve as a pressurized part, and the pressurized part is used to compress the pressurized space under the action of external force.

8. The refrigerator according to claim 7, characterized in that: The push switch is arranged in the box, and the channel is directly connected to the pressurized space.

9. The refrigerator according to claim 7, characterized in that: The push switch is arranged outside the box body, the channel extends into the pressurized space to communicate with it, and a sealing device is provided at the connection between the channel and the pressurized space.

10. The refrigerator according to claim 9, characterized in that: The passage passes through the heat-insulating foam layer of the box body and extends into the pressurized space to communicate therewith, and the heat-insulating foam layer is used to seal the connection between the passage and the pressurized space.

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