A ventilation fan for air purification

Abstract

This invention relates to the technical field of ventilation fans, and more particularly to a ventilation fan for air purification, comprising a mounting ring and an electric fan rotatably connected to the mounting ring; a mounting hole is provided in the wall; the mounting ring is detachably connected to the wall and is located within the mounting hole; it also includes a filter ring, etc.; a filter ring is fixedly connected to the lower side of the mounting ring; a cover plate is detachably connected to the filter ring; several connecting rods are fixedly connected to the cover plate; two connecting rods are detachably connected to a connecting ring. During normal ventilation, the folded tube is located in the gap between the outer side of the protective ring and the inner side of the mounting ring, preventing the airflow from contacting the inner side of the folded tube when it rises, thus preventing dust from adhering to the inner side of the folded tube. The protective ring protects the folded tube, and when the folded tube is pulled out, dust will not fall out after unfolding, preventing dust from scattering.

Description

Technical Field

[0001] This invention relates to the technical field of ventilation fans, and more particularly to a ventilation fan for air purification. Background Technology

[0002] Indoor ventilation fans are one of the most basic and widely used devices in building ventilation systems. They are mainly used to remove stale air, moisture, odors, and pollutants from indoor spaces to ensure indoor air quality. Occasionally, when cooking hot pot indoors, existing technology involves pulling out the folded duct inside the ventilation fan to concentrate the extraction of high-temperature fumes above the hot pot, thereby accelerating the extraction efficiency. However, because the inner side of the folded duct is exposed within the air duct, fine dust particles can easily adhere to and remain in the gaps of the folded duct when it is in its folded state during normal ventilation. This causes the dust particles to fall out during the subsequent manual unfolding of the folded duct, resulting in dust dispersion and thus polluting the indoor air environment. Summary of the Invention

[0003] To overcome the drawback that when the folded duct is in a folded state, fine dust in the duct easily adheres to and remains in the gaps of the folded duct, and when the folded duct is manually pulled out and unfolded, the dust remaining in the folded duct will fall out and cause dust to scatter, this invention provides a ventilation fan for air purification.

[0004] The technical implementation of this invention is as follows: an air purification ventilation fan includes a mounting ring and an electric fan rotatably connected to the mounting ring; a mounting hole is provided in the wall; the mounting ring is detachably connected to the wall and is located within the mounting hole; it also includes a filter ring; the filter ring is fixedly connected to the lower side of the mounting ring; a cover plate is detachably connected to the filter ring; several connecting rods are fixedly connected to the cover plate; two connecting rods are detachably connected to a connecting ring; the connecting ring has an annular groove, and the connecting rods are located within the annular groove; a folded tube of elastic material is fixedly connected to the connecting ring, the folded tube is located inside the mounting ring, and the folded tube is detachably connected to the mounting ring; a protective ring is fixedly connected to the mounting ring, and the folded tube is located within the gap between the outer side of the protective ring and the inner side of the mounting ring; the protective ring has several round holes; a filter screen is detachably connected to the inner side of the protective ring.

[0005] More preferably, it also includes springs; there are two filter screens distributed vertically, the lower filter screen is detachably connected to the protective ring, and the upper filter screen is rotatably and slidably connected to the protective ring, and the upper filter screen is made of magnetic material; several springs are fixedly connected between the two filter screens; and an annular magnet flush with the lower filter screen is fixedly connected to the inside of the connecting ring.

[0006] More preferably, it also includes a filter plate; the filter plate is detachably connected to the protective ring; and the filter plate is detachably connected to the sponge plate.

[0007] More preferably, the lower side of the cover plate is tapered.

[0008] More preferably, it also includes a retaining ring; the retaining ring of elastic material is fixed to the lower side of the protective ring, and the retaining ring contacts the inner side of the folded tube when the folded tube is pulled out.

[0009] More preferably, the cross-section of the retaining ring when unfolded is arranged in a figure-eight shape.

[0010] More preferably, it also includes a brush; a brush is provided on the outer side of the retaining ring.

[0011] More preferably, it also includes an elastic sheet; the connecting ring is made of an elastic material; the connecting ring has a notch; the connecting ring is fixedly connected to a wavy elastic sheet, and the elastic sheet is located within the notch; the elastic sheet is fixedly connected to a pull rope that is slidably connected to the connecting ring.

[0012] More preferably, it also includes a rotating ring; the rotating ring is rotatably connected to the wall and located in the mounting hole, there is a gap between the rotating ring and the cover plate, and the rotating ring and the filter ring are directly opposite each other; several spiral blades are fixedly connected to the inner side of the rotating ring; a red band is fixedly connected to the rotating ring.

[0013] More preferably, a sound-insulating pad is installed between the swivel and the wall.

[0014] Compared with the prior art, the present invention has the following advantages: During normal ventilation, the folded tube is located in the gap between the outer side of the protective ring and the inner side of the mounting ring, so that the airflow will not come into contact with the inner side of the folded tube when it rises, and the inner side of the folded tube will not be covered with dust. Thus, the folded tube is protected by the protective ring, and when the folded tube is pulled out, dust will not fall out after the folded tube is unfolded, thus preventing the phenomenon of dust scattering.

[0015] When high-temperature steam enters the folded pipe and flows upwards, it encounters the sponge plate. The sponge plate absorbs the moisture in the steam, reducing the moisture content in the flue gas. The relatively dry flue gas then flows upwards through the filter screen, reducing the risk of filter and duct blockage.

[0016] When the cover plate pulls the folded tube downwards, the cover plate releases the restriction on the retaining ring, allowing the retaining ring to unfold under the action of elasticity and contact the inside of the pulled-out folded tube. Thus, the retaining ring blocks and protects the gap between the inside of the folded tube and the outside of the protective ring, preventing flue gas and dirt from entering the gap between the inside of the folded tube and the outside of the protective ring, which would make cleaning inconvenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first structure of the ventilation fan for air purification disclosed in this invention. Figure 2 This is a schematic diagram of the second structure disclosed in this invention; Figure 3This is a partial cross-sectional view of the mounting ring disclosed in this invention; Figure 4 This is a partial structural diagram of the combination of cover plate, connecting rod, connecting ring, folding tube and protective ring disclosed in this invention; Figure 5 This is a partial structural diagram of the combination of filter screen, spring, annular magnet, filter plate and sponge plate disclosed in this invention; Figure 6 This is a diagram showing the state of the folded tube as it is pulled out, as disclosed in this invention. Figure 7 This is a diagram showing the usage state of the retaining ring disclosed in this invention; Figure 8 This is a partial structural diagram of the combination of the elastic sheet and the pull rope disclosed in this invention.

[0018] The components in the attached diagram are labeled as follows: 1-wall, 101-mounting ring, 102-electric fan, 103-filter ring, 104-cover plate, 105-connecting rod, 106-connecting ring, 107-folded tube, 108-protective ring, 109-filter screen, 1010-spring, 1011-ring magnet, 1012-filter plate, 1013-sponge plate, 1014-retaining ring, 1015-brush, 201-elastic sheet, 202-pull rope, 203-swivel ring, 204-spiral blade, 205-red band, 11-mounting hole, 61-annular groove, 62-notch, 81-round hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: A ventilation fan for air purification, such as Figures 1-8 As shown, it includes a mounting ring 101 and an electric fan 102; the wall 1 has a mounting hole 11; the wall 1 is detachably connected to the mounting ring 101, and the mounting ring 101 is located in the mounting hole 11; the mounting ring 101 is rotatably connected to the electric fan 102. It also includes a filter ring 103, a cover plate 104, a connecting rod 105, a connecting ring 106, a folded tube 107, a protective ring 108, and a filter screen 109; the filter ring 103 is fixedly connected to the lower side of the mounting ring 101; the filter ring 103 is detachably connected to the cover plate 104; the cover plate 104 is fixedly connected to two connecting rods 105; the two connecting rods 105 are connected to the connecting ring 106 through a locking block structure; the connecting ring 106 has an annular groove 61, and the connecting rods 105 are located in the annular groove. Inside the groove 61; a folded tube 107 of elastic material is fixedly connected to the connecting ring 106. The folded tube 107 is located inside the mounting ring 101, and the folded tube 107 is connected to the mounting ring 101 by a snap-fit ​​structure; a protective ring 108 is fixedly connected to the mounting ring 101, and the folded tube 107 is located in the gap between the outer side of the protective ring 108 and the inner side of the mounting ring 101; the protective ring 108 has several round holes 81; a filter screen 109 is detachably connected to the inner side of the protective ring 108.

[0021] It also includes a spring 1010 and a ring magnet 1011; there are two filter screens 109 distributed vertically, the lower filter screen 109 is detachably connected to the protective ring 108, and the upper filter screen 109 is rotatably and slidably connected to the protective ring 108, and the upper filter screen 109 is made of magnetic material; several springs 1010 are fixedly connected between the two filter screens 109; a ring magnet 1011 is fixedly connected to the inside of the connecting ring 106, and the ring magnet 1011 is flush with the lower filter screen 109.

[0022] It also includes a filter plate 1012 and a sponge plate 1013; the filter plate 1012 is detachably connected to the protective ring 108; the sponge plate 1013 is connected to the filter plate 1012 through a snap-fit ​​structure.

[0023] The lower side of the cover plate 104 is tapered, so that when the indoor airflow flows upward into the filter ring 103, after the airflow comes into contact with the lower side of the cover plate 104, the rising airflow is guided through the tapered lower side of the cover plate 104 to the gap between the cover plate 104 and the mounting hole 11, thereby reducing the resistance of the cover plate 104 to the rising airflow and improving the exhaust efficiency.

[0024] In use, the mounting ring 101 is installed into the mounting hole 11 on the wall 1 of the indoor ceiling, and then the external air duct is connected to the mounting ring 101. During normal ventilation, the electric fan 102 is started, so that the electric fan 102 draws the airflow. The indoor airflow rises and enters the inner side of the protective ring 108 through the gap between the cover plate 104 and the mounting hole 11, through the filter ring 103 and the round hole 81. At this time, the airflow is coarsely filtered by the filter ring 103. The airflow then flows upward and is further filtered by the filter screen 109 before being discharged to the outside through the external air duct, forcing the outside air into the room, thereby exchanging the indoor airflow.

[0025] When it is necessary to extract the high-temperature hot pot fumes, the operator first rotates the cover plate 104 to separate it from the filter ring 103. The cover plate 104 then drives the connecting rod 105 to rotate within the annular groove 61. Next, the cover plate 104 is pulled down, causing it to move the connecting ring 106 downwards via the connecting rod 105. The connecting ring 106 then pulls the folded tube 107 downwards and unfolds it. Figure 6 As shown, next, the connecting rod 105 is manually removed from the annular groove 61, so that the connecting rod 105 and the cover plate 104 are separated from the connecting ring 106. Then, the connecting ring 106 is aligned with the area where hot pot smoke needs to be extracted. At this time, the high-temperature hot pot smoke is concentratedly extracted through the pulled-out folded tube 107.

[0026] During normal ventilation, the folded tube 107 is located in the gap between the outer side of the protective ring 108 and the inner side of the mounting ring 101, so that the airflow will not come into contact with the inner side of the folded tube 107 when it rises, and dust will not adhere to the inner side of the folded tube 107. Thus, the protective ring 108 protects the folded tube 107, and when the folded tube 107 is pulled out, dust will not fall out after the folded tube 107 is unfolded, thus preventing the phenomenon of dust scattering.

[0027] During normal ventilation, two layers of filters 109 are stacked to filter dust and impurities in the airflow, improving the filtration efficiency of fine dust. However, considering that hot pot smoke contains large-diameter smoke particles and sticky impurities such as oil droplets, the stacked double-layer filters 109 provide significant resistance to the smoke. This makes it easy for the rising high-temperature smoke to quickly clog the lower first layer of filters 109, greatly increasing the suction power of the electric fan 102. Therefore, during normal ventilation, the annular magnet 1011 is used to filter the magnetic material... The upper filter screen 109 is magnetically attracted, causing it to move downwards and overlap with the lower filter screen 109. The spring 1010 is compressed. When the cover plate 104 drives the connecting rod 105, causing the connecting ring 106 to pull the folded tube 107 downwards, the connecting ring 106 drives the annular magnet 1011 downwards, disengaging it from the mounting ring 101. At this time, the upper filter screen 109 moves upwards under the action of the spring 1010, thus separating the two filter screens 109 and creating a gap. Figure 7 As shown, this reduces the flow resistance of the flue gas, allowing the lower first filter 109 to intercept large particles and oil droplets in the flue gas. The gap between the two filter screens 109 serves as a buffer settling zone, where some heavy particles fall off, allowing the upper second filter screen 109 to perform fine filtration of small impurities in the flue gas, thereby improving filtration efficiency and extending the overall service life of the filter screen 109.

[0028] Considering that the high-temperature hot pot smoke contains high-temperature water vapor, and since the temperature of the folded pipe 107 is lower than the temperature of the water vapor, the high-temperature water vapor easily condenses into water droplets when it enters the folded pipe 107 and flows upwards to exit through the duct. This increases the moisture content of particulate impurities, thereby increasing the risk of particulate impurities clogging the filter 109 and the duct. To solve this problem, when the high-temperature water vapor enters the folded pipe 107 and flows upwards, it encounters the sponge plate 1013, which absorbs the moisture in the water vapor to reduce the moisture content of the smoke. The relatively dry smoke then flows upward through the filter 109, reducing the risk of clogging the filter 109 and the duct. If the hot pot smoke were allowed to flow directly upward through the filter 109, the filter 109 would need to be disassembled, cleaned, or even replaced every time hot pot smoke is extracted, which is inconvenient. However, the removable sponge plate 1013 absorbs the moisture and oil droplets in the hot pot smoke. The sponge plate 1013 is disposable, and can be replaced manually only afterward, which is convenient and quick.

[0029] Example 2, based on Example 1, such as Figure 7 As shown, it also includes a retaining ring 1014; the retaining ring 1014 is fixedly connected to the lower side of the protective ring 108. The retaining ring 1014 is made of elastic material and contacts the inner side of the folding tube 107 when the folding tube 107 is pulled out.

[0030] When the baffle ring 1014 is unfolded, its cross-section is arranged in a figure-eight shape, which guides the rising flue gas to the inside of the baffle ring 1014 when the baffle ring 1014 is unfolded, thereby reducing the resistance of the baffle ring 1014 to the flue gas.

[0031] It also includes a brush 1015; a brush 1015 is provided on the outer side of the retaining ring 1014.

[0032] Considering that a gap exists between the inner side of the folded tube 107 and the outer side of the protective ring 108 when the folded tube 107 is pulled out, causing rising flue gas to easily enter the gap between the inner side of the folded tube 107 and the outer side of the protective ring 108 during flue gas extraction, resulting in dirt residue, to solve this problem, under normal ventilation conditions, the cover plate 104 compresses and limits the elastic retaining ring 1014, such as... Figure 5 As shown, when the cover plate 104 pulls the folded tube 107 downwards, the cover plate 104 releases the restriction on the retaining ring 1014, allowing the retaining ring 1014 to unfold under the action of elasticity and contact the inner side of the pulled-out folded tube 107. Thus, the retaining ring 1014 blocks and protects the gap between the inner side of the folded tube 107 and the outer side of the protective ring 108, preventing flue gas and contaminants from entering the gap between the inner side of the folded tube 107 and the outer side of the protective ring 108, which would make cleaning difficult. Figure 7 As shown.

[0033] Considering that when the folded tube 107 is pulled out to extract hot pot fumes, particulate impurities in the fumes easily adhere to the inside of the pulled-out folded tube 107, it would be inconvenient to disassemble and clean the folded tube 107 after each extraction. Therefore, when the folded tube 107 is put away after extraction, it moves upward under its own elastic force and slowly retracts into the gap between the inside of the folded tube 107 and the outside of the protective ring 108. This causes relative movement between the brush 1015 and the inside of the folded tube 107, allowing the brush 1015 to clean the residual particulate dirt on the inside of the folded tube 107. Afterward, manual cleaning of the retaining ring 1014 and the brush 1015 is all that is required.

[0034] Example 3, based on Example 2, such as Figure 2 , Figure 3 and Figure 8 As shown, it also includes an elastic sheet 201 and a pull rope 202; the connecting ring 106 is made of elastic material; the connecting ring 106 has a notch 62; the connecting ring 106 is fixedly connected to a wave-shaped elastic sheet 201, and the elastic sheet 201 is located inside the notch 62; the elastic sheet 201 is fixedly connected to a pull rope 202, and the pull rope 202 is slidably connected to the connecting ring 106.

[0035] It also includes a rotating ring 203, a spiral blade 204, and a red band 205; the rotating ring 203 is rotatably connected to the wall 1, and the rotating ring 203 is located in the mounting hole 11. There is a gap between the rotating ring 203 and the cover plate 104, and the rotating ring 203 is directly opposite the filter ring 103; several spiral blades 204 are fixedly connected to the inner side of the rotating ring 203; the red band 205 is fixedly connected to the rotating ring 203.

[0036] A sound insulation pad is installed between the rotating ring 203 and the wall 1 to reduce the vibration generated when the rotating ring 203 rotates, thereby reducing the noise of the rotating ring 203.

[0037] When the folded tube 107 is pulled out and used for suction in other areas, the pull rope 202 can be manually pulled to tighten or release it, thereby tightening or releasing the connecting ring 106. The connecting ring 106 and the elastic plate 201 undergo adaptive deformation under their own elastic force, causing the elastic material opening of the folded tube 107 to shrink or expand, thereby quickly adjusting the size of the suction port of the folded tube 107 to adapt to the suction area required in different places and improve suction efficiency.

[0038] To facilitate manual observation of the airflow status of the exhaust fan, existing technology typically involves installing a fluttering red ribbon 205 at the fan's vent. When the fan is operating, the airflow causes the ribbon 205 to flutter. However, when the fan is off or at low speeds, the ribbon 205 easily adheres tightly to the vent grille or pipe wall due to static electricity, oil, or gravity, preventing it from fluttering immediately upon restarting. Furthermore, after prolonged use, the ribbon 205 easily accumulates oil, wastewater, and vapor, causing it to become entangled and sticky, making it difficult for manual observation of the airflow. To address the issue of the red ribbon 205 drifting, a rotating ring 203 is installed in the area directly opposite the filter ring 103. When the airflow generated by the electric fan 102 is drawn into the filter ring 103, the airflow passes through the spiral blades 204, causing the spiral blades 204 to rotate under the action of the airflow. This allows the red ribbon 205 to drift in a rotating state when the electric fan 102 is working, preventing the red ribbon 205 from sticking to the same position for a long time, reducing the probability of oil stains solidifying and sticking, and maintaining the flexibility of the red ribbon 205's movement.

[0039] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes made to the content described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A ventilation fan for air purification, comprising a mounting ring (101) and an electric fan (102) rotatably connected to the mounting ring (101); a mounting hole (11) is provided in the wall (1); the mounting ring (101) is detachably connected to the wall (1), and the mounting ring (101) is located within the mounting hole (11); characterized in that: It also includes a filter ring (103); the filter ring (103) is fixedly connected to the lower side of the mounting ring (101); the filter ring (103) is detachably connected to a cover plate (104); the cover plate (104) is fixedly connected to several connecting rods (105); two connecting rods (105) are detachably connected to a connecting ring (106); the connecting ring (106) has an annular groove (61), and the connecting rods (105) are located in the annular groove (61); the connecting ring (106) is fixedly connected to an elastic material A folded tube (107) is located inside the mounting ring (101), and the folded tube (107) is detachably connected to the mounting ring (101); a protective ring (108) is fixedly connected to the mounting ring (101), and the folded tube (107) is located in the gap between the outer side of the protective ring (108) and the inner side of the mounting ring (101); the protective ring (108) has several round holes (81); a filter screen (109) is detachably connected to the inner side of the protective ring (108).

2. The ventilation fan for air purification according to claim 1, characterized in that: It also includes a spring (1010); there are two filters (109) distributed vertically, the lower filter (109) is detachably connected to the protective ring (108), and the upper filter (109) is rotatably and slidably connected to the protective ring (108), and the upper filter (109) is made of magnetic material; several springs (1010) are fixedly connected between the two filters (109); a ring magnet (1011) flush with the lower filter (109) is fixedly connected to the inside of the connecting ring (106).

3. A ventilation fan for air purification according to claim 2, characterized in that: It also includes a filter plate (1012); a protective ring (108) is detachably connected to the filter plate (1012); and the filter plate (1012) is detachably connected to a sponge plate (1013).

4. A ventilation fan for air purification according to claim 1, characterized in that: The cover plate (104) is tapered on the underside.

5. A ventilation fan for air purification according to claim 1, characterized in that: It also includes a retaining ring (1014); the lower side of the protective ring (108) is fixed with a retaining ring (1014) of elastic material, and the retaining ring (1014) contacts the inner side of the folded tube (107) when the folded tube (107) is pulled out.

6. A ventilation fan for air purification according to claim 5, characterized in that: The cross-section of the retaining ring (1014) when unfolded is arranged in a figure-eight shape.

7. A ventilation fan for air purification according to claim 6, characterized in that: It also includes a brush (1015); a brush (1015) is provided on the outside of the retaining ring (1014).

8. A ventilation fan for air purification according to claim 1, characterized in that: It also includes an elastic sheet (201); the connecting ring (106) is made of elastic material; the connecting ring (106) has a notch (62); the connecting ring (106) is fixedly connected to a wave-shaped elastic sheet (201), and the elastic sheet (201) is located inside the notch (62); the elastic sheet (201) is fixedly connected to a pull rope (202) that is slidably connected to the connecting ring (106).

9. A ventilation fan for air purification according to claim 1, characterized in that: It also includes a rotating ring (203); the wall (1) is rotatably connected to the rotating ring (203) located in the mounting hole (11), there is a gap between the rotating ring (203) and the cover plate (104), the rotating ring (203) and the filter ring (103) are directly opposite each other; several spiral blades (204) are fixedly connected to the inner side of the rotating ring (203); the rotating ring (203) is fixedly connected to the red band (205).

10. A ventilation fan for air purification according to claim 9, characterized in that: A sound insulation pad is provided between the rotating ring (203) and the wall (1).

Images