A sealing structure and sealing strip for automatically balancing the pressure inside and outside a refrigerator

Abstract

The patent belongs to the technical field of refrigerators, and particularly relates to a sealing structure and a sealing strip for automatically balancing the pressure inside and outside a refrigerator, comprising: a main body, which is arranged between a door body and a cabinet body when the door body is closed on the cabinet body; a gas passage for connecting the outside and a freezing cavity of the cabinet body; a movable blocking edge, which is connected to the main body and arranged on one side of the main body close to the freezing cavity of the cabinet body when the door body is closed on the cabinet body, and used for blocking the gas passage to stop the freezing cavity of the cabinet body from communicating with the outside; and the movable blocking edge elastically deforms towards the inside of the cabinet body according to the pressure difference between the inside and the outside of the cabinet body to connect the freezing cavity of the cabinet body with the outside. The patent only needs to set the gas passage and the blocking edge structure on the sealing strip, so that the pressure stabilizing structure is greatly simplified, and the assembly difficulty and manufacturing cost are reduced.

Description

Technical Field

[0001] This invention belongs to the field of freezer technology, specifically referring to a sealing structure and sealing strip for dynamically balancing the internal and external pressures of a freezer. Background Technology

[0002] For example, Chinese invention patent 2021107116390 discloses a freezer and its pressure relief control method, which includes a cabinet body, a door body, and a sealing strip fixed to the door body. The cabinet body has a mating surface that seals with the sealing strip when the door body is closed. The freezer also has a pressure relief device installed on the cabinet body. The pressure relief device includes a cam, a motor that drives the cam to rotate, and a controller that controls the operation of the motor. The cam has an initial position where it rotates to a position where it does not exceed the mating surface and a working position where it rotates to a position where it partially protrudes beyond the mating surface. The freezer in this patent balances the air pressure inside and outside the freezer by setting a pressure relief device on the freezer to facilitate the user opening the freezer door; however, the pressure relief device has a complex structure, requires a motor to drive it, has high configuration costs, and is complicated to manufacture and install. Summary of the Invention

[0003] The purpose of this invention is to provide a sealing structure and sealing strip for dynamically balancing the internal and external pressures of a refrigerator, which is simple in structure and easy to configure.

[0004] The objective of this invention is achieved as follows: A sealing strip, comprising: The main body is installed between the door and the cabinet when the door is closed; the space between the door and the cabinet is a gas passage that connects the outside to the freezer cavity of the cabinet. A movable baffle, connected to the main body, is used to block the gas passage on the side of the main body near the freezer cavity when the door is closed on the cabinet, so that the freezer cavity is no longer connected to the outside. The movable edge elastically deforms towards the inside of the cabinet according to the air pressure difference between the inside and outside of the cabinet, thereby connecting the cabinet's freezing chamber with the outside.

[0005] A sealing structure for automatically balancing the internal and external pressure of a freezer, comprising: Cabinet; A door for closing onto a cabinet, wherein the cabinet has a mating surface that engages with the door when it is closed; The aforementioned sealing strip, and The exhaust assembly has a gas passage; the sealing strip and the exhaust assembly are used to abut against each other when the door is closed on the cabinet.

[0006] Furthermore, the exhaust assembly includes a plurality of blocks arranged in sequence, with gas channels formed between adjacent blocks; the sealing strip is used to abut against the top of the blocks.

[0007] Furthermore, the blocks located on both ends have beveled portions for fitting the sealing strip.

[0008] Furthermore, the sealing strip is fixed to the door body, and the exhaust assembly is disposed on the mating surface.

[0009] Furthermore, one side of the door is rotatably connected to the cabinet, and the exhaust assembly is located on the side of the cabinet that is rotatably connected to the door.

[0010] Furthermore, the exhaust components are provided in several units and are sequentially arranged on the mating surface. When the door is closed on the cabinet, the sealing strip simultaneously abuts against several of the exhaust components.

[0011] Furthermore, the door body is provided with a boss portion, which is located on one side of the main body. An exchange channel is formed between the boss portion and the surface, and the sealing strip is located in the exchange channel.

[0012] The outstanding and beneficial technical effects of this invention compared to the prior art are: This patent achieves its effect solely through the setting of a gas channel and a retaining structure on the sealing strip, which greatly simplifies the pressure stabilizing structure and reduces assembly difficulty and manufacturing costs.

[0013] This patent increases the exchange of internal and external air pressure by setting up three exhaust components, thereby increasing the efficiency of air pressure stability and balance.

[0014] In this patent, since the exhaust assembly is located on the side where the cabinet and the door are rotatably connected, the protruding exhaust assembly will not affect the user's normal access to refrigerated items when the user opens the door, thus increasing the user's comfort. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the freezer in this invention.

[0016] Figure 2 This is a schematic diagram of the structure of the freezer after it is opened in this invention.

[0017] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 This is a cross-sectional diagram of the cabinet and door when they are separated.

[0019] Figure 5 This is a cross-sectional diagram of the cabinet and the door when the door is closed on the cabinet.

[0020] The meaning of the labels in the diagram: 1. Sealing strip; 11. Main body; 12. Movable edge; 2. Cabinet; 21. Mating surface; 22. Exchange channel; 23. Opening; 3. Door; 31. Boss; 4. Exhaust assembly; 41. Gas channel; 42. Stop; 43. Angled surface. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments: A sealing structure for automatically balancing the internal and external pressure of a freezer, comprising a cabinet body 2, a door 3, a sealing strip 1, and an exhaust assembly 4, such as... Figure 1 , 2 As shown, the cabinet 2 is square, and the freezer in this patent is horizontal, with an upward-facing opening 23 on its cabinet 2, and a freezing chamber inside the cabinet 2; the door 3 is used to close above the opening 23 of the cabinet 2 and seal the freezing chamber; the cabinet 2 has a mating surface 21 located on the outer edge of the opening 23, and when the door 3 is closed on the cabinet 2, the mating surface 21 abuts against the door 3. The sealing strip 1 includes a main body 11 and a movable edge 12. Since the cabinet 2 in this patent is square and horizontal, in order to adapt to the horizontal square cabinet 2, the main body 11 is a rubber airbag component. The rubber airbag component is manufactured in a square shape and fixed on the edge of the door 3. When the door 3 is closed on the cabinet 2, the main body 11 is squeezed between the edge of the door 3 and the mating surface 21 of the cabinet 2, and the sealing is achieved through the main body 11.

[0022] like Figure 4 , 5 As shown, the movable baffle 12 is integrally formed on the side of the main body 11 near the freezer cavity of the cabinet 2, and is used to block one end of the gas channel 41 to prevent the freezer cavity of the cabinet 2 from communicating with the outside. The movable baffle 12 elastically deforms inward toward the inside of the cabinet 2 according to the pressure difference between the inside and outside of the cabinet 2, thereby connecting the freezer cavity of the cabinet 2 with the outside. In this embodiment, the movable baffle 12 is a rubber part integrally formed on the main body 11, which can deform under force. One side wall of the movable baffle 12 faces the freezer cavity of the cabinet 2, and the other side of the movable baffle 12 is connected to the outside through the gas channel 41. The movable baffle 12 deforms and swings according to the pressure difference between the inside and outside of the cabinet 2 to adjust its obstruction between the freezer cavity of the cabinet 2 and the outside.

[0023] like Figure 2 , 3 As shown, the gas passage 41 is disposed in the exhaust assembly 4. In this embodiment, the exhaust assembly 4 is specifically a plurality of baffles 42 arranged in sequence, and a gas passage 41 is formed between adjacent baffles 42.

[0024] Combination Figure 3 , 4In practice, the stop block 42 is fixed on the mating surface 21. Correspondingly, the main body 11 is provided with a plug-in structure, which fixes the main body 11 to the edge of the door 3. When the door 3 is closed on the cabinet 2, the stop blocks 42 of the main body 11 abut against each other, sealing the upper surface of the stop blocks 42 through the main body 11, and forming a gas channel 41 between adjacent stop blocks 42 that connects to the outside gas. At this time, the outer side of the movable stop edge 12 is adjacent to the outside through the gas channel 41, while its inner side is connected to the freezing cavity of the cabinet 2. When the freezer in this patent is working, the freezing cavity of the freezer cools down, making its internal air pressure lower than the outside air pressure. At this time, there is an air pressure difference between the inside and outside of the cabinet 2, and the outside air pressure will act on the movable stop edge 12 through the gas channel 41.

[0025] Combination Figure 4 , 5 As shown, in this embodiment, the movable baffle 12 is inclined towards the inside of the cabinet 2. External air pressure will push the movable baffle 12 open towards the inside of the cabinet 2, thereby connecting the gas channel 41 inward with the freezing chamber of the cabinet 2, allowing external air to enter the cabinet 2. In this way, the internal and external gases exchange with each other, keeping the internal and external air pressures balanced, so that the user can open the cabinet door. After the internal and external air pressures are balanced, the movable baffle 12 will reassemble and block one end of the gas channel 41 under the action of the gas in the freezing chamber of the cabinet 2, preventing too much external gas from entering and affecting the cooling effect of the freezer. In this way, the movable baffle 12 continuously opens and closes under the action of air pressure to achieve automatic balance of the internal and external air pressure of the freezer. Compared with the existing pressure stabilization structure, this patent only uses the gas channel 41 and the baffle structure set on the sealing strip 1 to achieve this, which greatly simplifies the pressure stabilization structure and reduces the assembly difficulty and manufacturing cost.

[0026] In other embodiments, the exhaust assembly 4 can also be fixed to the sealing strip 1. As long as the door 3 is fixed to the cabinet 2, the exhaust assembly 4 and the sealing strip 1 abut against each other to form a gas channel 41, the movable stop 12 can function normally. Alternatively, the sealing strip 1 can be fixed to the mating surface 21, and the exhaust assembly 4 can be placed on the door 3, which can also achieve normal operation of the movable stop 12.

[0027] Furthermore, the stops 42 located on both ends have beveled portions 43 for fitting the sealing strip 1, such as... Figure 3 As shown, the inclined surface 43 is tilted at about 30 degrees to both ends to buffer the damage caused by the sharp stop 42 pressing against the sealing strip 1, thereby increasing the service life of the sealing strip 1.

[0028] Furthermore, the door body 3 is provided with a boss 31, and an exchange channel 22 is formed between the boss 31 and the surface. For example... Figure 4 , 5 As shown, the inner side of the door body 3 is provided with an inner liner, one end of which has the protrusion 31. The protrusion 31 is located on one side of the main body 11. The protrusion 31 is square and downwardly positioned. The protrusion 31 is used to press against one side of the main body 11 and against the root of the movable baffle 12, thereby squeezing the movable baffle 12 as a whole into the exchange channel 22 located below the protrusion 31. This restricts the movable baffle 12 in the exchange channel 22, preventing it from falling off and affecting the normal operation of the movable baffle 12.

[0029] Furthermore, several exhaust assemblies 4 are provided and sequentially arranged on the mating surface 21. When the door 3 is closed on the cabinet 2, the sealing strip 1 simultaneously abuts against several of the exhaust assemblies 4. Figure 2 , 3 As shown, this embodiment includes three exhaust assemblies 4. One side of the door 3 is rotatably connected to the cabinet 2, and the three exhaust assemblies 4 are located on the side where the cabinet 2 and door 3 are rotatably connected. These assemblies allow the sealing strip 1 to press against the three exhaust assemblies 4 simultaneously, increasing the exchange of internal and external air pressure and improving the efficiency of air pressure stability and balance. Furthermore, because the exhaust assemblies 4 are located on the side where the cabinet 2 and door 3 are rotatably connected, the protruding exhaust assemblies 4 do not significantly obstruct the user's normal access to refrigerated items when the door 3 is opened, increasing user comfort.

[0030] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sealing structure for automatically balancing the internal and external pressures of a freezer, characterized in that, include: Cabinet (2); A door (3) is used to close onto a cabinet (2), wherein the cabinet (2) is provided with a mating surface (21) that engages with the door (3) when it is closed; Sealing strip (1), and An exhaust assembly (4) is provided with a gas passage (41); the sealing strip (1) and the exhaust assembly (4) are used to abut against each other when the door (3) is closed on the cabinet (2); The sealing strip includes: The main body (11) is installed between the door (3) and the cabinet (2) when the door (3) is closed on the cabinet (2); the door (3) and the cabinet (2) form a gas passage (41) that connects the outside world to the freezer chamber of the cabinet (2); The movable baffle (12) is connected to the main body (11) and is used to block the gas passage (41) so that the freezer cavity of the cabinet (2) is no longer connected to the outside when the door (3) is closed on the cabinet (2). The movable baffle (12) elastically deforms towards the inside of the cabinet (2) according to the air pressure difference inside and outside the cabinet (2) to connect the freezing chamber of the cabinet (2) with the outside.

2. The sealing structure for automatically balancing the internal and external pressures of a freezer according to claim 1, characterized in that: The exhaust assembly (4) includes a plurality of baffles (42) arranged in sequence, and a gas channel (41) is formed between adjacent baffles (42); the sealing strip (1) is used to abut against the top of the baffles (42).

3. The sealing structure for automatically balancing the internal and external pressures of a freezer according to claim 2, characterized in that: The stop blocks (42) located at the beginning and end have beveled portions (43) for fitting the sealing strip (1).

4. The sealing structure for automatically balancing the internal and external pressures of a freezer according to claim 1, characterized in that: The sealing strip (1) is fixed on the door body (3), and the exhaust assembly (4) is disposed on the mating surface (21).

5. The sealing structure for automatically balancing the internal and external pressures of a freezer according to claim 4, characterized in that: One side of the door (3) is rotatably connected to the cabinet (2), and the exhaust assembly (4) is located on the side of the cabinet (2) that is rotatably connected to the door (3).

6. The sealing structure for automatically balancing the internal and external pressures of a freezer according to claim 4, characterized in that: The exhaust components (4) are provided in several places and are arranged sequentially on the mating surface (21). When the door (3) is closed on the cabinet (2), the sealing strip (1) simultaneously abuts against several of the exhaust components (4).

7. The sealing structure for automatically balancing the internal and external pressures of a freezer according to claim 1, characterized in that: The door body (3) is provided with a boss (31), the boss (31) is located on one side of the main body (11), and an exchange channel (22) is formed between the boss (31) and the surface, and the sealing strip (1) is located in the exchange channel (22).

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