A ventilation device for facilitating opening of a freezer door

Abstract

The utility model discloses a kind of ventilation devices facilitating freezing door opening, including pipe body, one end of the pipe body is provided with into pipe, the lower end of the into pipe is provided with into box pipe which is through with refrigerator inside, the other end of the pipe body is provided with external seat, the lower end of the external seat is provided with output seat which is through with refrigerator outside, the internal lower end of the external seat is provided with baffle, the middle part of the baffle is provided with balance seat which is through, for the pressure balance of gas in and outside refrigerator, into pipe and external seat between are provided with through pipe which is through, the inside of the through pipe is provided with limit stop, the side of limit stop close to external seat is provided with filter cage, the lower end of the through pipe is located in filter cage lower side and is provided with liquid recovery pipe which is through, the end of the liquid recovery pipe is provided with storage box. The ventilation device can balance the air pressure in and outside refrigerator, facilitate freezing door opening, filter exchange gas, increase the high sensitivity of ventilation device.

Description

Technical Field

[0001] This utility model relates to a ventilation device, and more particularly to a ventilation device that facilitates the opening of the freezer door. Background Technology

[0002] As a core device for food freezing and storage in homes and businesses, the freezer door plays a crucial role in isolating the freezer compartment from the external environment. It must maintain a low freezer temperature (typically below -18°C) and ensure long-term food preservation while also meeting the user's need for frequent door opening and closing to access food. With rising consumer demands, users are placing higher requirements on the ease of use (smooth opening / closing), sealing (cold air leakage control), and energy efficiency of freezer doors.

[0003] Currently, refrigerators typically only use magnetic sealing strips along the edges of the freezer door. These strips, when close to the refrigerator's metal or magnetic frame, seal the freezer. However, when the user opens the door to retrieve items and then closes it, the extremely low internal temperature causes the air to contract, creating a significant pressure difference between the inside and outside of the door. The internal pressure is lower than the external atmospheric pressure. This pressure difference exerts a strong suction effect on the door, resulting in significant resistance when opening it again, making operation difficult. This negatively impacts the user experience and may damage the door or its sealing structure if forced open, reducing the freezer's lifespan and reliability. Therefore, it is necessary to design a ventilation system that balances the internal and external air pressure to facilitate freezer door opening. Utility Model Content

[0004] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a ventilation device that facilitates the opening of the freezer door, so as to achieve the purpose of balancing the air pressure inside and outside the refrigerator and facilitating the opening of the freezer door.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A ventilation device for facilitating the opening of the freezer door includes a pipe body. One end of the pipe body is provided with an inlet pipe, and the lower end of the inlet pipe is provided with an inlet pipe that communicates with the interior of the refrigerator. The other end of the pipe body is provided with an external seat, and the lower end of the external seat is provided with an output seat that communicates with the exterior of the refrigerator. The lower interior of the external seat is provided with a partition, and a balance seat is provided through the middle of the partition for balancing the pressure of the gas inside and outside the refrigerator.

[0006] Preferably, a through pipe is provided between the inlet pipe and the outer seat, and a limiting plate is provided inside the through pipe. A filter cage is provided on the side of the limiting plate near the outer seat. A liquid recovery pipe is provided through the lower end of the through pipe below the filter cage. A storage box is provided at the end of the liquid recovery pipe for filtering liquid and impurities in the gas, ensuring the operation of the balancing seat's ventilation.

[0007] Preferably, the filter cage has several support bars on its periphery, and both ends of the filter cage are provided with perforated discs connected to the support bars. The support bars and perforated discs are made of rigid plastic material and are used for gas flow.

[0008] Preferably, a traction rope is provided on the perforated plate on the side of the filter cage near the outer seat, the traction rope extends into the outer seat, and an inlet seat is provided at the end of the outer seat, with a sealing cap snapped into the inlet seat for pulling out and cleaning the filter cage.

[0009] Preferably, the limiting plate has an opening in the middle, and the filter cage has a water-absorbing ring and two filter screens arranged in sequence in the middle. The water-absorbing ring has a ring structure for smooth gas filtration.

[0010] Preferably, bolts for installation with the refrigerator are provided on both sides of the inlet pipe, and clamping ends are provided at both ends of the inlet pipe. A transition part is provided at the outer end of the clamping end. The transition part is made of butyl rubber. Several through-folding parts are provided in the middle of the inlet pipe. A flexible hose is provided at the lower end of the output seat. The end of the flexible hose extends outward from the refrigerator for installation of the ventilation device.

[0011] Preferably, the balance seat is a tubular structure, with limiting plates provided at both the upper and lower ends of the balance seat, an expansion groove annularly formed in the middle of the balance seat, and rotating shafts rotatably provided at both opposite ends of the expansion groove. A common rotating disk is provided between the two rotating shafts, and sealing plates are provided on both the upper and lower sides of the rotating disk for air exchange on both sides to maintain pressure balance.

[0012] Preferably, the limiting plate is located inside the balance seat, the limiting plate has a ring structure, and the space between the limiting plate and the expansion groove is set as a rotation area to limit the rotation range of the rotating disk.

[0013] Preferably, the rotating disk is made of metal, the diameter of the rotating disk is smaller than the inner diameter of the balance seat, the cross-section of the expansion groove is arc-shaped, and the rotating shaft is located between the expansion groove and the two sealing plates for balancing the rotating disk and the sealing plates in the balance seat.

[0014] Preferably, the sealing sheet is made of silicone material, and both sealing sheets have edges that fit against the balance seat. The two edges are located on both sides of the expansion groove for sealing the balance seat.

[0015] Compared with existing technologies, the ventilation device provided by this utility model has one end connected to the freezer cavity and the other end connected to the outside, increasing the communication pipe between the freezer and the external environment. By utilizing the balance seat to balance the air pressure inside and outside the freezer door in real time, it can solve the problem of difficulty in opening the door due to air pressure differences. The balance cavity formed by the expansion groove and the edge of the sealing plate provides unobstructed movement space for the rotating disc, improving the air pressure difference response sensitivity and increasing the ease of opening the freezer door. Furthermore, the use of a filter recovery structure, filter cage, internal water absorption ring, and filter screen in the ventilation device can filter liquids and impurities in the flowing gas, ensuring the cleanliness of the gas entering the balance seat, preventing blockage of the balance seat, and increasing the air pressure balance sensitivity of the ventilation device. At the same time, the use of a recovery pipe and storage box to transfer liquid to the outside, and the traction rope to pull out the filter cage, allows for the replacement and cleaning of this structure, ensuring the quality of gas filtration and improving the ventilation effect.

[0016] It should be understood that the general descriptions and details herein are exemplary and illustrative only and are not intended to limit this disclosure.

[0017] This application provides an overview of various implementations or exemplary embodiments of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the ventilation device of this utility model; Figure 2 This is a partial structural cross-sectional view of the external seat in the ventilation device of this utility model; Figure 3 This is an exploded view of a portion of the structure of the external seat and sealing cover in the ventilation device of this utility model; Figure 4 This is a partial structural cross-sectional view of the inlet pipe, the inlet box pipe, and the filter cage in the ventilation device of this utility model. Figure 5 This is a partial structural cross-sectional view of the filter cage in the ventilation device of this utility model. Figure 6 This is a partial balance diagram of the balance seat in the ventilation device of this utility model; Figure 7 This is a partial structural diagram of the balance seat and the inclined rotating disk in the ventilation device of this utility model.

[0019] Key reference numerals: 1. Inlet pipe; 2. Through pipe; 3. External seat; 4. Inlet tube; 5. Clamping end; 6. Transition section; 7. Folding section; 8. Partition plate; 9. Balance seat; 10. Limiting plate; 11. Expansion slot; 12. Rotating shaft; 13. Rotating disk; 14. Sealing plate; 15. Edge section; 16. Output seat; 17. Inlet seat; 18. Sealing cover; 19. Liquid recovery pipe; 20. Storage box; 21. Limiting plate; 22. Filter cage; 23. Support bar; 24. Water absorption ring; 25. Filter screen; 26. Traction rope. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. Note: The described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] As attached Figure 1 To be continued Figure 7 As shown, the ventilation device provided in the embodiment of this utility model addresses the problem that the freezer door and freezer cabinet are difficult to reopen after being closed during use. This application designs a ventilation device to improve upon this problem. First, the main body of the ventilation device is a pipe body, which consists of an inlet pipe 1, a through pipe 2, and an external seat 3 that pass through it sequentially. The three are coaxially arranged and fixedly connected by a sealing structure.

[0022] First, an inlet pipe 4 is installed at the lower end of the inlet pipe 1 at one end of the pipe body, serving as a through connection structure with the refrigerator. Both ends of the inlet pipe 4 are configured as clamping ends 5. A transition part 6 made of butyl rubber is installed on the outer end of the clamping end 5. The transition part 6 is a flanged structure that fits snugly against the inner wall of the inlet pipe 1. The clamping end 5 and the inlet pipe 1 are pressurized together. The butyl rubber transition part 6 is squeezed to fill the gap between the two, achieving a sealed connection. Then, several folded parts 7 are installed in the middle of the inlet pipe 4 (the folded parts 7 are multiple corrugated folded structures evenly distributed along the axial direction of the inlet pipe 4, which can achieve ± (Angle compensation within 15° range), several folding parts 7 are all connected to the clamping ends 5 on both sides; when the inlet pipe 1 is installed with the refrigerator, one end of the clamping end 5 is first inserted through the inlet pipe 1, and the other end of the clamping end 5 extends into the refrigerator and is connected to the freezer cavity that needs to be depressurized. The inlet pipe 1 has a through hole, and the refrigerator has a threaded hole at the corresponding position. After the bolt passes through the through hole, it is tightened with the threaded hole to press and fix the inlet pipe 1 and the refrigerator. The inlet pipe 1 is fixed, and the sealing between the clamping end 5 and the refrigerator or the inlet pipe 1 is increased by the transition part 6, thus completing the fixing of one end of the ventilation device.

[0023] Next, the other end of the tube is set as the external seat 3, and the lower end of the external seat 3 is set as the output seat 16. The output seat 16 is installed through the thickness direction of the side wall of the refrigerator. The lower end of the output seat 16 is connected to the hose, and the end of the hose away from the output seat 16 is connected to the outside of the refrigerator. When the external seat 3 and the output seat 16 are installed, the end of the hose is pre-connected to the outside, and the lower end of the external seat 3 is connected through the output seat 16. Similarly, bolts are used to pass through the external seat 3 and then threadedly connected to the refrigerator to fix the external seat 3. The positions of the two ends of the ventilation device are determined, and the installation of the ventilation device on the refrigerator is completed. The inlet pipe 1 and the external seat 3 are connected by the through pipe 2. During the use of the ventilation device, the baffle 8 set at the lower end of the external seat 3 and the tubular balance seat 9 set through the middle of the baffle 8 allow the gas inside and outside the freezer door to flow to each other, balance the pressure of the gas inside and outside the refrigerator, and facilitate the opening of the freezer door. Among them, such as Figure 6 and 7 As shown, the inner wall of the balance seat 9 has an expansion groove 11 with an arc-shaped cross-section in the middle. Shaft holes are formed on the opposite side walls of the expansion groove 11. The two ends of the rotating shaft 12 are respectively embedded in the shaft holes, and the rotating shaft 12 is clearance-fitted with the shaft holes, allowing the rotating shaft 12 to rotate around its own axis. A rotating disk 13 is then placed between the two rotating shafts 12. Sealing plates 14 are provided on both the upper and lower sides of the rotating disk 13, serving as a sealing structure for the ventilation device. Edge portions 15 are provided on the edges of the sealing plates 14, with the two edge portions 15 located on the upper and lower sides of the expansion groove 11 respectively. When the gas pressure on both sides is the same, the rotating disk 13 remains horizontal when the gas pressure on both sides is balanced. The rotating disk 13 is balanced in the balance seat 9, and the edge portions 15 of the sealing plates 14 are in contact with the inner wall of the balance seat 9, achieving a seal. Furthermore, a balance is formed between the two edge portions 15 and the expansion groove 11. The cavity allows the rotating shaft 12 to rotate flexibly, facilitating the flow of gas with a pressure difference between the upper and lower ends of the balance seat 9. The expansion groove and the edge of the sealing plate form a balance cavity, providing unobstructed movement space for the rotating disk and improving the sensitivity of the pressure difference response. When a pressure difference occurs between the upper and lower sides, the pressure difference on both sides of the sealing plate 14 can push the edge 15, causing the rotating disk 13 to rotate around the rotating shaft 12 as the axis of rotation. This opens the balance seat 9, allowing gas to flow and balancing the pressure on both sides of the freezer door, making the air pressure inside and outside the freezer door the same, facilitating the reopening of the freezer door. When the upper and lower air pressures are the same, the rotating disk 13 is in a balanced state in the balance seat 9, and the sealing plates 14 on both the upper and lower sides are in contact with the inner wall of the balance seat 9, sealing the balance seat 9 and achieving a seal after the freezer is closed, preventing the internal cold air from escaping.

[0024] like Figure 6 , 7As shown, it is worth noting that the rotating disk 13 can be made of metal, and the diameter of the rotating disk 13 is set smaller than the inner diameter of the balance seat 9 to facilitate the installation of the rotating shaft 12; the sealing plate 14 is made of silicone material, and the elasticity of the sealing plate 14 makes it easy for the rotating disk 13 to rotate with the rotating shaft 12, increasing the smoothness of gas flow replacement in the ventilation device, realizing the dual requirements of "smooth rotation" and "tight sealing", solving the contradiction of traditional seals that are "either poorly sealed or difficult to rotate", and at the same time, it can also provide a stable seal for the balance seat 9.

[0025] When the rotating disk 13 rotates at an angle in the balance seat 9, limiting plates 10 can be set at both the upper and lower ends of the balance seat 9. The limiting plates 10 are placed inside the balance seat 9 and have a ring structure. The area between the limiting plates 10 and the expansion groove 11 is set as a rotation area. The maximum rotation angle of the rotating disk 13 does not exceed ±45° to avoid excessive deformation of the sealing plate 14. The limiting plates 10 can limit the angle of the rotating disk 13 with an excessive rotation angle, increase the stability of the gas flow of the ventilation device, and prevent the angle of the rotating disk 13 from being stuck.

[0026] like Figure 1 , 4As shown in Figure 5, in order to ensure the ventilation sensitivity of the balance seat 9 and increase the ventilation effect of the sealing plate 14, a liquid and impurity collection structure can be set between the inlet pipe 1 and the through pipe 2 to ensure the cleanliness of the flowing gas in the balance seat 9 and prevent the sealing plate 14 from sticking to the balance seat 9, which would cause the balance seat 9 to be blocked and affect the ventilation quality. The collection structure utilizes a through pipe 2 that connects the inlet pipe 1 and the outer seat 3. A limiting plate 21 is installed inside the through pipe 2, with an opening in the middle. A filter cage 22 is then installed on the side of the limiting plate 21 near the outer seat 3, serving as the filter structure. This filter cage 22 is a perforated frame structure composed of several circumferentially evenly distributed support bars 23 (8-15 bars) and two perforated discs, facilitating both gas flow and the insertion of the filter structure. The support bars 23 are located around the periphery of the filter cage 22, and the perforated discs are located at both ends of the filter cage 22. Both the support bars 23 and the perforated discs are made of rigid plastic. The limiting plate 21 axially limits the filter cage 22, preventing it from excessively extending into the through pipe 2. The setting of the traction rope 26 on the hollow plate near one end of the outer seat 3, and the length of the traction rope 26 extending into the outer seat 3, the end of the outer seat 3 is fixed with the inlet seat 17 as the mounting end of the balance seat 9, and the sealing cover 18 is snapped into the inlet seat 17 to seal the ventilation device, increasing the detachability of the outer seat 3, making it convenient for manual removal of the filter cage 22 for cleaning or replacement; and, the middle of the filter cage 22 is arranged with a ring-shaped water absorption ring 24 and two sheet-like filter screens 25 (both filter screens 25 are made of 80-120 mesh stainless steel filter screens). The water absorption ring 24 is made of super absorbent resin (SAP) material, which absorbs liquid from the gas flowing in the pipe 2, filters impurities, and maintains smooth gas flow. Furthermore, such as Figure 4-5 As shown, a liquid recovery pipe 19 can be installed at the lower end of the through pipe 2, located below the filter cage 22. The liquid recovery pipe 19 is perpendicular to the through pipe 2. When the liquid in the water absorption ring 24 and filter screen 25 in the filter cage 22 condenses, it can flow downwards due to gravity. Using the liquid recovery pipe 19 as the transfer end for collecting liquid, the liquid can be transferred from the through pipe 2. Then, the storage box 20 at the end of the liquid recovery pipe 19 is used to collect the transferred liquid, increasing the dryness of the filter cage 22 structure, providing favorable conditions for gas flow, improving the filtration effect of the filter cage 22 on liquid and impurities, and facilitating gas flow and pressure balance. The end of the liquid recovery pipe 19 away from the through pipe 2 is threadedly connected to the storage box 20, which facilitates the disassembly and cleaning of the storage box 20.

[0027] Working principle: When the ventilation device is used in a freezer, the rotating disc 13 and sealing plate on the balance seat adaptively adjust the air pressure inside and outside the freezer, so as to balance the air pressure inside and outside and facilitate the opening and use of the freezer door.

[0028] The ventilation device is a coaxial, continuous tubular structure, consisting of an inlet pipe 1, a connecting pipe 2, and an external seat 3 connected sequentially. The inlet pipe 1 connects to the freezer cavity via an inlet pipe 4, and the external seat 3 connects to the external environment via an outlet seat 16 and a flexible hose, forming a gas flow channel to ensure gas circulation. The balance seat 9 can be used to seal and control this path. When the air pressure inside and outside the freezer is the same, the metal rotating disc 13 remains horizontal under its own weight and the pressure from both sides. The arc-shaped edges 15 of the upper and lower silicone sealing sheets 14 are tightly fitted to the inner wall of the balance seat 9, achieving a channel seal and preventing cold air leakage. When the freezer is closed, the internal air pressure decreases (or increases), creating a pressure difference. This pressure difference pushes the edges 15 of the sealing sheets 14, causing the rotating disc 13 to rotate around the axis 12. The sealing sheets 14 separate from the inner wall of the balance seat, opening the channel of the balance seat 9. Gas flows along the path of "outside → flexible hose → outlet seat 16 → balance seat 9 → connecting pipe 2 → inlet pipe 1 → freezer cavity," quickly balancing the internal and external air pressure.

[0029] To prevent impurities and condensate from affecting the sensitivity of the balance seat 9, an integrated filtration and recovery structure can be installed in the through-pipe 2 to treat the flowing gas. During filter cage 22 installation, the sealing cap 18 can be opened from the inlet seat 17, the filter cage 22 can be inserted into the through-pipe 2, and the limiting plate 21 can be used to limit its position. The traction rope 26 remains in the external seat 3. Finally, the sealing cap 18 is bolted to the inlet seat 17 to seal it. The gas flowing through the filter cage 22 uses its built-in superabsorbent polymer (SAP) absorbent ring 24 to absorb condensate, and then uses the filter screen 25 to intercept impurities, ensuring the cleanliness of the gas entering the balance seat 9. The absorbed liquid falls to the lower end of the through-pipe 2 under gravity and is collected through the vertically arranged liquid recovery pipe 19 into the threaded storage box 20, keeping the filter structure dry, preventing the sealing plate 14 from sticking, and improving the sensitivity of the balance seat 9.

[0030] Of course, the above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A ventilation device for facilitating the opening of a freezer door, characterized in that, The device includes a pipe body, one end of which is provided with an inlet pipe (1), the lower end of which is provided with an inlet pipe (4) that communicates with the inside of the refrigerator, and the other end of which is provided with an external seat (3), the lower end of which is provided with an output seat (16) that communicates with the outside of the refrigerator. The lower inner end of the outer seat (3) is provided with a partition (8), and a balance seat (9) is provided through the middle of the partition (8) for balancing the pressure of the gas inside and outside the refrigerator.

2. The ventilation device as described in claim 1, characterized in that, A through pipe (2) is provided between the inlet pipe (1) and the outer seat (3). A limiting plate (21) is provided inside the through pipe (2). A filter cage (22) is provided on the side of the limiting plate (21) near the outer seat (3). A liquid recovery pipe (19) is provided at the lower end of the through pipe (2) below the filter cage (22). A storage box (20) is provided at the end of the liquid recovery pipe (19) for filtering liquid and impurities in the gas, ensuring the ventilation of the balance seat (9).

3. The ventilation device as described in claim 2, characterized in that, The filter cage (22) is provided with several support bars (23) around its periphery. Both ends of the filter cage (22) are provided with hollowed-out discs connected to the several support bars (23). The support bars (23) and the hollowed-out discs are made of hard plastic material and are used for gas flow.

4. The ventilation device as described in claim 2, characterized in that, The filter cage (22) has a traction rope (26) on the hollow plate near the outer seat (3). The traction rope (26) extends into the outer seat (3). The end of the outer seat (3) is provided with an inlet seat (17). A sealing cover (18) is snapped into the inlet seat (17) for pulling out and cleaning the filter cage (22).

5. The ventilation device as described in claim 2, characterized in that, The limiting plate (21) has an opening in the middle, and the filter cage (22) has a water absorption ring (24) and two filter screens (25) arranged in sequence in the middle. The water absorption ring (24) has a ring structure and is used for smooth gas filtration.

6. The ventilation device as described in claim 1, characterized in that, Both ends of the inlet tube (4) are provided with clamping ends (5), and the outer end of the clamping end (5) is provided with a transition part (6). The transition part (6) is made of butyl rubber. The middle part of the inlet tube (4) is provided with several through-use folding parts (7). The lower end of the output seat (16) is provided with a hose. The end of the hose extends outward from the refrigerator for the installation of the ventilation device.

7. The ventilation device as described in claim 1, characterized in that, The balance seat (9) is a tubular structure. Limiting plates (10) are provided at both the upper and lower ends of the balance seat (9). An expansion groove (11) is provided in the middle of the balance seat (9). Rotating shafts (12) are rotatably provided at both ends of the expansion groove (11). A rotating disk (13) is provided between the two rotating shafts (12). Sealing plates (14) are provided on both the upper and lower sides of the rotating disk (13) for air exchange on both sides to maintain pressure balance.

8. The ventilation device as described in claim 7, characterized in that, The limiting piece (10) is located inside the balance seat (9). The limiting piece (10) has a ring structure. The limiting piece (10) and the expansion groove (11) are set as a rotation area to limit the rotation range of the rotating disk (13).

9. The ventilation device as described in claim 7, characterized in that, The rotating disk (13) is made of metal and its diameter is smaller than the inner diameter of the balance seat (9). The cross-section of the expansion groove (11) is arc-shaped. The rotating shaft (12) is located between the expansion groove (11) and the two sealing plates (14) for balancing the rotating disk (13) and the sealing plates (14) in the balance seat (9).

10. The ventilation device as described in claim 9, characterized in that, The sealing sheet (14) is made of silicone material. The edges of both sealing sheets (14) are provided with edge portions (15) that fit with the balance seat (9). The two edge portions (15) are located on both sides of the expansion groove (11) for sealing the balance seat (9).

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