Fresh air machine shell capable of reducing air leakage rate

Abstract

The utility model relates to the technical field of fresh air machines, and discloses a fresh air machine shell capable of reducing the air leakage rate, which comprises a fresh air machine shell body of which the upper side surface and the lower side surface are in bolted connection with an access cover, and a first moving frame sleeved on the rear side of the surface of the fresh air machine shell body, and further comprises a second moving frame arranged behind the first moving frame, a sealing cover body is fixed between the first moving frame and the second moving frame, and sealing air bags are fixed to the surfaces of the inner walls of the first moving frame and the second moving frame. The novel fan has a sealing effect, the stretchable sealing cover is arranged on the outer side of the shell of the novel fan, the whole shell is wrapped and sealed by stretching the sealing cover, a gap between the shell and the surrounding environment can be effectively filled, the air leakage phenomenon is reduced, and the sealing performance of the novel fan is improved; the air leakage rate is reduced, unfiltered air can be effectively prevented from entering a room, the quality of fresh air entering the room is ensured, the indoor air quality is improved, and a healthier and more comfortable living environment is provided for users.

Description

Technical Field

[0001] This utility model relates to the field of fresh air system technology, specifically to a fresh air system housing that reduces air leakage rate. Background Technology

[0002] A fresh air system is an effective air purification device that circulates indoor air. On the one hand, it expels polluted indoor air to the outside, and on the other hand, it introduces fresh outdoor air into the room after sterilization, disinfection, and filtration, ensuring that the room is always filled with fresh and clean air. The fresh air system uses patented fresh air convection technology to achieve indoor air convection through autonomous air supply and exhaust, thereby maximizing indoor air replacement. The built-in multi-functional purification system ensures that the air entering the room is clean and healthy.

[0003] Most current fresh air systems have inspection covers on their casings for accessing internal components. However, these covers are often bolted to the casing, creating gaps that can lead to air leaks. This not only affects the system's operation but can also reduce indoor air quality. The ductwork connections are crucial ventilation paths; loose connections can also cause leaks, hindering ventilation and causing polluted indoor air to mix with fresh air, preventing proper separation of clean and polluted air and ultimately lowering indoor air quality. Utility Model Content

[0004] The purpose of this invention is to provide a fresh air unit housing that reduces air leakage rate, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fresh air unit housing with reduced air leakage rate, comprising a fresh air unit housing body with inspection covers bolted to its upper and lower surfaces, and a first movable frame sleeved on the rear side of the fresh air unit housing body surface, and further comprising:

[0006] A second movable frame is arranged behind the first movable frame, and a sealing cover body is fixed between the first and second movable frames. Sealing airbags are fixed on the inner wall surfaces of both the first and second movable frames.

[0007] An air injection pipe is installed through the top of the first and second movable frames, and the bottom end of the air injection pipe is connected to the sealing airbag. A sealing cap is fitted on the top of the air injection pipe. Positioning structures are fixed on the upper and lower sides of the left and right sides of the front of the first movable frame.

[0008] Preferably, the outer casing of the fresh air unit has limit grooves on both the left and right sides, and the front of the first movable frame has limit plates fixed on both the left and right sides. One side of the limit plate extends into the interior of the limit groove and slides in connection with the inner wall of the limit groove.

[0009] Preferably, the limiting plate is L-shaped, and a sealing block is fixed on the rear surface of the limiting plate. The sealing block is located inside the limiting groove and is slidably connected to the inner wall of the limiting groove.

[0010] Preferably, the positioning structure includes a fixing plate, a threaded sleeve, a threaded rod, and a knob. The fixing plate is fixed above and below the left and right sides of the front of the first movable frame. The threaded sleeve is fixed on the surface of one side of the fixing plate. The threaded rod is threaded inside the threaded sleeve, and one end of the threaded rod passes through the fixing plate and is slidably connected to the fixing plate. The knob is fixed to one end of the threaded rod.

[0011] Preferably, the material of the sealing cover body is EPDM rubber, and the surface of the sealing cover body is coated with polytetrafluoroethylene coating.

[0012] Preferably, the first movable frame and the second movable frame are fixed with fixing blocks on the left and right sides of the upper and lower sides, and a telescopic rod is fixed on the surface of the fixing blocks facing each other.

[0013] Preferably, four blocking blocks are fixed to the surface of the second movable frame, and the blocking blocks are located on the back of the second movable frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention features a sealing effect. The outer shell of the fresh air unit is equipped with a stretchable sealing cover. By stretching the sealing cover to wrap and seal the entire shell, it can effectively fill the gap between the shell and the surrounding environment, reduce air leakage, improve the sealing performance of the fresh air unit, and reduce the air leakage rate. This can effectively prevent unfiltered air from entering the room, ensure the quality of fresh air entering the room, improve indoor air quality, and provide users with a healthier and more comfortable living environment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0018] Figure 3 This is a three-dimensional schematic diagram of the sealing cover body in this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the first movable frame in this utility model.

[0020] In the diagram: 1. Fresh air unit outer casing; 2. First movable frame; 3. Second movable frame; 4. Sealing cover body; 5. Sealing airbag; 6. Air injection pipe; 7. Positioning structure; 71. Fixing plate; 72. Threaded sleeve; 73. Threaded rod; 74. Knob; 8. Limiting groove; 9. Limiting plate; 10. Sealing block; 11. Fixing block; 12. Telescopic rod; 13. Blocking block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 As shown, a fresh air unit housing with reduced air leakage rate includes a fresh air unit housing body 1. Inspection covers are bolted to both the upper and lower surfaces of the fresh air unit housing body 1. A first movable frame 2 is fitted onto the rear side of the surface of the fresh air unit housing body 1. A second movable frame 3 is positioned behind the first movable frame 2. A sealing cover body 4 is fixed between the first movable frame 2 and the second movable frame 3. Sealing airbags 5 are fixed to the inner walls of both the first movable frame 2 and the second movable frame 3. An air injection pipe 6 is inserted through the top of both the first movable frame 2 and the second movable frame 3, and the bottom end of the air injection pipe 6 is connected to the sealing airbag 5. A sealing cover is fitted above the air injection pipe 6. Positioning structures 7 are fixed to the upper and lower sides of the left and right sides of the front of the first movable frame 2.

[0023] Limiting grooves 8 are provided on both the left and right sides of the main body 1 of the fresh air unit. Limiting plates 9 are fixed on both the left and right sides of the front of the first movable frame 2. One side of the limiting plate 9 extends into the interior of the limiting groove 8 and slides with the inner wall of the limiting groove 8. The limiting plate 9 is L-shaped, and a sealing block 10 is fixed on the rear surface of the limiting plate 9. The sealing block 10 is located inside the limiting groove 8 and slides with the inner wall of the limiting groove 8. The limiting grooves 8 and the limiting plates 9 limit the first movable frame 2, thereby ensuring that the first movable frame 2 can only move within the fresh air unit. The surface of the outer casing 1 slides back and forth to unfold the sealing cover 4, sealing the outside of the fresh air unit. The sealing effect is further improved by the setting of the sealing block 10. When the first moving frame 2 moves forward to the moving distance, the staff inflates the sealing airbag 5. The inflated sealing airbag 5 adheres to the surface of the fresh air unit outer casing 1 and also adheres to the surface of the sealing block 10. The sealing block 10 seals the limiting groove 8 to prevent air from leaking from the limiting groove 8 and further reduce the air leakage rate.

[0024] The positioning structure 7 includes a fixing plate 71, a threaded sleeve 72, a threaded rod 73, and a knob 74. The fixing plate 71 is fixed above and below the left and right sides of the front of the first movable frame 2. The threaded sleeve 72 is fixed to the surface of one side of the fixing plate 71. The threaded rod 73 is threaded into the inside of the threaded sleeve 72, and one end of the threaded rod 73 passes through the fixing plate 71 and slides between the fixing plate 71 and the fixing plate 71. The knob 74 is fixed to one end of the threaded rod 73. When the operator pulls the first movable frame 2 forward, by rotating the knobs 74 on both sides, the knobs 74 drive the threaded rod 73 to rotate, so that one end of the threaded rod 73 moves to the front position of the fresh air unit housing body 1, thereby controlling the position of the first movable frame 2 and preventing the first movable frame 2 from sliding backward, so as to effectively seal the fresh air unit housing body 1.

[0025] The sealing cover body 4 is made of EPDM rubber, and the surface of the sealing cover body 4 is coated with polytetrafluoroethylene (PTFE). EPDM rubber has good weather resistance, ozone resistance and chemical corrosion resistance. Moreover, EPDM rubber has good flexibility and elasticity, which can adapt to the shape changes of the fresh air unit shell and achieve a good sealing effect. By coating with PTFE, the coefficient of friction can be reduced, reducing the wear of the sealing cover body 4 during the stretching and shrinking process, and maintaining its good sealing performance.

[0026] The first movable frame 2 and the second movable frame 3 are both fixed with fixing blocks 11 on the left and right sides of the upper and lower sides, and telescopic rods 12 are fixed on the surface of the fixing blocks 11 facing each other. The fixing blocks 11 and telescopic rods 12 can support the second movable frame 3, so that the second movable frame 3 can only slide in the back and forth direction.

[0027] Four blocking blocks 13 are fixed on the surface of the second movable frame 3, and the blocking blocks 13 are located on the back of the second movable frame 3. The movement range of the second movable frame 3 can be controlled by the setting of the blocking blocks 13. When the second movable frame 3 moves forward to the rear side of the fresh air unit housing body 1, the blocking blocks 13 will fit against the back of the fresh air unit housing body 1, thereby positioning the second movable frame 3 for subsequent sealing operations.

[0028] Working principle: When the fresh air unit housing 1 needs to be installed, the operator moves the fresh air unit housing 1 to the corresponding installation position. Then, the operator uses tools to install and secure the fresh air unit housing 1. After installation, the operator pulls the first moving frame 2 and the second moving frame 3, causing them to move forward. Once the blocking block 13 on the back of the second moving frame 3 is in contact with the surface of the back of the fresh air unit housing 1, the operator stops moving the second moving frame 3. At this point, the operator continues to pull the first moving frame 2 forward, causing the sealing cover 4 to be stretched and extend to cover the fresh air unit housing 1. On the outside of body 1, the limiting plate 9 slides inside the limiting groove 8. When the first moving frame 2 and the second moving frame 3 are respectively located on the front and rear sides of the fresh air unit housing body 1, the operator can rotate the knobs 74 on both sides, thereby causing one end of the threaded rod 73 to extend out. The position of the first moving frame 2 is positioned by the threaded rod 73. Then, the operator opens the sealing cover on the surface of the air injection pipe 6 and uses an air inflation device to inject air into the inside of the air injection pipe 6. At this time, the sealing airbag 5 will expand and fit against the surface of the fresh air unit housing body 1. Thus, the sealing airbag 5 and the sealing cover body 4 seal the entire fresh air unit housing body 1 to prevent air leakage.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fresh air machine shell with reduced air leakage rate, comprising a fresh air machine shell body (1) with an inspection cover bolted to the upper and lower side surfaces, and a first movable frame (2) sleeved on the rear side of the surface of the fresh air machine shell body (1), characterized in that, Also include: The second moving frame (3) is arranged behind the first moving frame (2), the first moving frame (2) and the second moving frame (3) are fixed with sealing cover body (4), the surface of the inner wall of the first moving frame (2) and the second moving frame (3) is fixed with sealing air bag (5); The gas injection pipe (6) is arranged through the top of the first moving frame (2) and the second moving frame (3), and the bottom end of the gas injection pipe (6) is connected with the sealing air bag (5), the sealing cover is arranged above the gas injection pipe (6), and the upper and lower sides of the left and right sides of the front of the first moving frame (2) are fixed with the positioning structure (7).

2. The fresh air unit housing with reduced air leakage according to claim 1, wherein: The left and right sides of the new fan shell body (1) are provided with limiting grooves (8), the front of the first moving frame (2) is fixed with limiting plates (9) on the left and right sides, one side of the limiting plate (9) extends to the inside of the limiting groove (8) and is connected with the inner wall of the limiting groove (8) slidingly.

3. The fresh air unit housing with reduced air leakage according to claim 2, wherein: The limiting plate (9) is L-shaped as a whole, and the surface of the rear side of the limiting plate (9) is fixed with a blocking block (10), the blocking block (10) is located in the inside of the limiting groove (8) and is connected with the inner wall of the limiting groove (8) slidingly.

4. The fresh air unit housing with reduced air leakage according to claim 1, wherein: The positioning structure (7) includes a fixed sheet (71), a threaded sleeve (72), a threaded rod (73) and a knob (74), the fixed sheet (71) is fixed on the upper and lower sides of the left and right sides of the front of the first moving frame (2), the threaded sleeve (72) is fixed on the surface of one side of the fixed sheet (71), the threaded rod (73) is threadedly connected in the inside of the threaded sleeve (72), and one end of the threaded rod (73) penetrates through the fixed sheet (71) and is connected with the fixed sheet (71) slidingly, and the knob (74) is fixed on one end of the threaded rod (73).

5. The fresh air unit housing with reduced air leakage according to claim 1, wherein: The material of the sealing cover body (4) is ethylene propylene rubber, and the surface of the sealing cover body (4) is coated with a polytetrafluoroethylene coating.

6. The fresh air unit housing with reduced air leakage according to claim 1, wherein: The left and right sides of the upper and lower sides of the first moving frame (2) and the second moving frame (3) are fixed with fixed blocks (11), and the surface of the opposite side of the fixed block (11) is fixed with telescopic rods (12).

7. The fresh air unit housing with reduced air leakage according to claim 1, wherein: The surface of the second moving frame (3) is fixed with four blocking blocks (13), and the blocking blocks (13) are located on the back of the second moving frame (3).

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