Hand-push positive pressure air filtering structure

Abstract

A hand-pushing positive pressure air filtering structure comprises a trolley, an exhaust fan, an air filter, a filtering cover, a gas dispersing unit, a filtering sleeve and a pressing plate, the exhaust fan is fixedly arranged on the trolley, the air filter is combined with the exhaust fan, the filtering cover is arranged on the air filter in a covering mode, the gas dispersing unit comprises an air outlet connector, and the air outlet connector is connected with the pressing plate. The air outlet joint is fixedly arranged on a positioning plate of the cover body and is provided with a plurality of air outlet ends, the filtering cover is covered with the filtering sleeve, and the pressing plate is pressed against the top of the filtering sleeve; therefore, through the arrangement of the gas dispersing unit, the gas inside the exhaust fan can be output through the gas outlet ends of the gas outlet connector, and is connected to each protective garment through a pipeline, so that the gas can be supplied to multiple persons for use, and the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to an air filtering structure, in particular to a hand-pushed positive-pressure air filtering structure. Background Art

[0002] When there are harmful substances in the surrounding of the working environment, such as during pesticide spraying or disinfection work, the staff usually wears a full set of protective clothing including a face mask, and an air filter is provided on the back of the protective clothing. The outside air is continuously filtered through the air filter, and the clean air is input into the protective clothing through a pipeline to reduce the impact of harmful substances on the staff.

[0003] The above-mentioned air filter is mainly divided into an inner layer and an outer layer. The outer layer is responsible for the first filtration to filter some substances with larger particle sizes, and the inner layer is responsible for the second filtration to filter some substances with smaller particle sizes. A filter element is arranged inside the inner layer, and various filter materials (such as activated carbon) can be filled between the filter element and the inner layer. However, when the filter element is replaced, the filter material often deposits at the bottom of the inner layer, causing trouble in the assembly of the new filter element. Moreover, there is only one such pipeline in the existing air filters on the market, so it can only be used by one person and cannot provide simultaneous use for two or more staff members, thus lacking work efficiency.

[0004] In view of this, based on years of experience in the manufacturing, development and design of related products, the inventor has carefully designed and evaluated in detail for the above-mentioned objectives, and finally obtained a practical utility model. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a hand-pushed positive-pressure air filtering structure, which has a simple structure, is convenient for operation and maintenance, can overcome the defects of the prior art, improve work efficiency, increase the convenience of assembly, enhance the flexibility of movement, avoid the offset between structures, extend the service life and reduce the use cost.

[0006] To achieve the above purpose, the utility model discloses a hand-pushed positive-pressure air filtering structure, which is characterized by comprising:

[0007] A trolley;

[0008] An exhaust fan, which is fixed on the trolley. The exhaust fan includes a body and an air supply pipe. A suction port is provided at the top of the body, and a coupling disc is formed around the suction port. The coupling disc has an inner clamping portion, an outer clamping portion, a positioning screw and a limit screw. The inner clamping portion and the outer clamping portion are respectively annularly arranged on the inner wall surface and the outer wall surface of the coupling disc, and one end of the air supply pipe is communicated with the body;

[0009] An air filter is combined with the combination plate of the exhaust fan, and the interior of the exhaust fan is communicated with the interior of the air filter through the air intake. The air filter includes an outer filter element, an inner filter element and a filter core. A first clamping portion is provided at the bottom of the outer filter element, and the first clamping portion is engaged with the outer clamping portion. The inner filter element is located inside the outer filter element. A second clamping portion is provided at the bottom of the inner filter element, and the second clamping portion is engaged with the inner clamping portion. An annular groove is formed inside the inner filter element corresponding to the second clamping portion. In addition, a filter material accommodating layer is formed inside the inner filter element, and the filter core is provided inside the filter material accommodating layer. The filter core is clamped in the annular groove so that the filter core and the inner filter element are integrated into one;

[0010] A filter cover covers the air filter. The filter cover includes a cover body and a plurality of air holes penetrating through the cover body. The cover body has a top plate and four side plates extending downward from the edge of the top plate. A plurality of extension openings are provided on the top plate. In addition, a positioning plate is provided on the inner wall surface of one of the side plates of the cover body;

[0011] A gas dispersion unit includes an air outlet joint. The air outlet joint is fixed to the positioning plate of the cover body and is communicated with the air supply pipe. The air outlet joint has a plurality of air outlet ends;

[0012] A filter sleeve covers the filter cover. The filter sleeve is respectively provided with a first through hole corresponding to each extension opening of the cover body;

[0013] A pressing plate presses against the top of the filter sleeve. The pressing plate is respectively provided with a second through hole corresponding to each first through hole of the filter sleeve. Each air outlet end respectively passes through each extension opening and each first through hole, and extends out from each second through hole.

[0014] Among them, the trolley includes a vehicle frame, a plurality of wheels and a bearing plate. The vehicle frame has a bottom frame portion and a handle portion. The handle portion extends vertically from the bottom frame portion. The wheels are fixed at four corner positions below the bottom frame portion, and the bearing plate is screwed to the top of the bottom frame portion.

[0015] Among them, the exhaust fan further includes a positioning screw and a limiting screw. The positioning screw horizontally penetrates through the inner clamping portion and the outer clamping portion, and an annular groove is recessed on the top surface of the combination plate between the inner clamping portion and the outer clamping portion. The limiting screw vertically penetrates through the annular groove and abuts against the positioning screw.

[0016] Among them, the gas dispersion unit further includes a pressurizing fan. The pressurizing fan is fixed to the positioning plate of the cover body, and the pressurizing fan is connected to the other end of the air supply pipe. The air outlet joint is communicated with the pressurizing fan.

[0017] Wherein, a limiting groove is recessed on each of the two side edges of the pressing plate, and a fixing screw is respectively limited in each limiting groove. Each fixing screw locks and fixes the pressing plate to the filter sleeve and the filter cover.

[0018] From the above structure, the following technical effects can be achieved by the present utility model:

[0019] 1. Gas dispersed supply: Through the arrangement of the gas dispersion unit of the present utility model, the gas located inside the exhaust fan can be output through the air outlet ends of the air outlet joint, and is respectively connected to each protective clothing by a pipeline, so that the gas can be supplied for multiple people to use, thereby improving work efficiency.

[0020] 2. Improve assembly convenience: Since the filter material accommodating layer is formed on the inner side of the inner filter element, the filter material can be accommodated in the filter material accommodating layer, and can be effectively separated from the filter element. Therefore, the filter element will not be affected by the filter material when being replaced, so as to improve the assembly convenience.

[0021] 3. Prevent the filter cover and the filter sleeve from shifting: The pressing plate presses against the top of the filter sleeve, and each fixing screw located in each limiting groove can lock and fix the pressing plate to the filter sleeve and the filter cover, so as to prevent the filter cover and the filter sleeve from shifting relative to the pressing plate.

[0022] 4. Provide a clamping and positioning effect: Due to the arrangement of the positioning screw, a clamping and positioning effect can be provided between the first clamping part and the outer clamping part, and between the second clamping part and the inner clamping part, so that the outer filter element and the inner filter element can be combined with the exhaust fan. At the same time, the limiting screw abuts against the positioning screw to prevent the positioning screw from shifting.

[0023] 5. Reduce the work burden and increase the flexibility of movement: The present utility model combines the exhaust fan and the air filter on the trolley, so that the staff does not need to carry the heavy air filter, which can reduce the work burden and increase the flexibility of movement of the positive pressure air filtering structure on the trolley. Description of the Drawings

[0024] Figure 1 It is a perspective view of the preferred embodiment of the present utility model.

[0025] Figure 2 It is an exploded view of the filter sleeve and the pressing plate of the preferred embodiment of the present utility model.

[0026] Figure 3 It is an upper view of the preferred embodiment of the present utility model with the filter sleeve and the pressing plate omitted.

[0027] Figure 4 It is an exploded view of the filter cover and the collar of the preferred embodiment of the present utility model.

[0028] Figure 5 Exploded view of the exhaust fan and air filter of the preferred embodiment of the present utility model.

[0029] Figure 6 Cross-sectional view of the exhaust fan combined with the air filter of the preferred embodiment of the present utility model.

[0030] Figure 7 Three-dimensional view of the exhaust fan of the preferred embodiment of the present utility model.

[0031] Figure 8 is Figure 7 Partial cross-sectional view at A.

[0032] Figure 9 Cross-sectional view of the inner filter element of the preferred embodiment of the present utility model.

[0033] Figure 10 Partial cross-sectional view of the side view of the preferred embodiment of the present utility model.

[0034] Figure 11 Partial cross-sectional view of the front view of the preferred embodiment of the present utility model.

[0035] Figure 12 Schematic diagram of gas flow of the preferred embodiment of the present utility model. Detailed implementation manner

[0036] Please refer to Figures 1 to 6 As shown, the present utility model discloses a hand-pushed positive pressure air filtration structure 100, which includes:

[0037] A handcart 10, the handcart 10 includes a vehicle frame 11, a plurality of wheels 12 and a bearing plate 13. The vehicle frame 11 has a chassis part 111 and a handle part 112. The handle part 112 extends upright from the chassis part 111. The wheels 12 are fixed at four corner positions below the chassis part 111, and the bearing plate 13 is screwed to the top of the chassis part 111.

[0038] An exhaust fan 20, with reference to Figure 7 and Figure 8As shown, the exhaust fan 20 is fixedly installed on the bearing plate 13 of the trolley 10. The exhaust fan 20 includes a base body 21 and an air supply pipe 22. A suction port 23 is provided at the top of the base body 21, and a coupling plate 24 is formed around the suction port 23. The coupling plate 24 has an inner clamping portion 241, an outer clamping portion 242, a positioning screw 243, and a limit screw 244. The inner wall surface and the outer wall surface of the coupling plate 24 are respectively provided with the inner clamping portion 241 and the outer clamping portion 242 in a circular shape. The positioning screw 243 is horizontally inserted through the inner clamping portion 241 and the outer clamping portion 242. In addition, a circular groove 245 is recessed on the top surface of the coupling plate 24 between the inner clamping portion 241 and the outer clamping portion 242. The limit screw 244 is vertically inserted through the circular groove 245 and abuts against the positioning screw 243. One end of the air supply pipe 22 is communicated with the base body 21. The exhaust fan 20 sucks gas from the suction port 23 into the interior of the base body 21 and sends it out through the air supply pipe 22.

[0039] An air filter 30, with reference to Figure 9 As shown, the air filter 30 is coupled to the coupling plate 24 of the exhaust fan 20, and the interior of the exhaust fan 20 is communicated with the interior of the air filter 30 through the suction port 23. The air filter 30 includes an outer filter element 31, an inner filter element 32, and a filter core 33. A first clamping portion 311 is provided at the bottom of the outer filter element 31, and the first clamping portion 311 is engaged with the outer clamping portion 242. The inner filter element 32 is located inside the outer filter element 31. A second clamping portion 321 is provided at the bottom of the inner filter element 32, and the second clamping portion 321 is engaged with the inner clamping portion 241. In addition, an annular groove 323 is formed inside the inner filter element 32 corresponding to the second clamping portion 321. Moreover, a filter material accommodating layer 322 is formed inside the inner filter element 32. The filter material accommodating layer 322 can be filled with various filter materials (such as activated carbon). The filter core 33 is provided inside the filter material accommodating layer 322, and the filter core 33 is clamped in the annular groove 323, so that the filter core 33 and the inner filter element 32 are integrated.

[0040] Since the filter material accommodating layer 322 is formed inside the inner filter element 32, the filter material can be accommodated in the filter material accommodating layer 322 and can be effectively separated from the filter core 33. Therefore, when the filter core 33 is replaced, it will not be affected by the filter material, thereby improving the convenience of assembly.

[0041] Among them, due to the setting of the positioning screw 243, the clamping and positioning effects between the first clamping portion 311 and the outer clamping portion 242, and between the second clamping portion 321 and the inner clamping portion 241 can be provided, so that the outer filter element 31 and the inner filter element 32 can be coupled to the exhaust fan 20. At the same time, the limit screw 244 abuts against the positioning screw 243, which can prevent the positioning screw 243 from generating displacement.

[0042] A filter cover 40 is provided, which covers the air filter 30. The filter cover 40 includes a cover body 41 and a plurality of air holes 42 penetrating through the cover body 41. The cover body 41 has a top plate 411 and four side plates 412 extending downward from the edge of the top plate 411. A plurality of outlet openings 413 are provided on the top plate 411. In addition, a positioning plate 414 in an L shape is provided on the inner wall surface of one of the side plates 412 of the cover body 41.

[0043] Wherein, the lower edge of the filter cover 40 abuts against the periphery of the carrier plate 13. After being wound around by a bundle of rings 43 between the filter cover 40 and the carrier plate 13, a fixing member 431 is used to tighten it, so as to limit and fix the filter cover 40 and prevent the filter cover 40 from shifting on the carrier plate 13.

[0044] A gas dispersion unit 50, with reference to Figure 10 and Figure 11 As shown, the gas dispersion unit 50 includes a pressurizing fan 51 and an air outlet joint 52. The pressurizing fan 51 and the air outlet joint 52 are fixed to the positioning plate 414 of the cover body 41. The pressurizing fan 51 is connected to the other end of the air supply duct 22, and the air outlet joint 52 communicates with the pressurizing fan 51. The air outlet joint 52 has a plurality of air outlet ends 521.

[0045] Wherein, the purpose of setting the pressurizing fan 51 is only to provide greater wind force. In addition, the pressurizing fan 51 can also be connected to an appropriate position of the air supply duct 22, and can exert a greater air volume to improve efficiency.

[0046] A filter sleeve 60 is provided, which covers the filter cover 40 to provide an additional layer of filtering effect, further reducing the probability of harmful substances (such as viruses and bacteria) directly contacting the surface of the air filter 30, and further extending the service life of the air filter 30. The filter sleeve 60 is respectively provided with a first through hole 61 corresponding to each of the outlet openings 413 of the cover body 41.

[0047] Wherein, a plurality of through holes 62 are intermittently penetrated through the periphery of the bottom of the filter sleeve 60, and a bundle of ropes 63 can pass through the through holes 62 to tighten the filter sleeve 60 on the filter cover 40 to prevent the filter sleeve 60 from falling off.

[0048] A pressing plate 70 presses against the top of the filter sleeve 60 to prevent the filter cover 40 and the filter sleeve 60 from shifting. A second perforation 71 is respectively formed through each of the first perforations 61 of the pressing plate 70 corresponding to the filter sleeve 60. Wherein, each air outlet end 521 respectively passes through each extension opening 413 and each first perforation 61, and extends out from each second perforation 71. And a limiting groove 72 is respectively recessed at both side edges of the pressing plate 70, and a fixing screw 73 is respectively limited in each limiting groove 72. Each fixing screw 73 is used to lock the pressing plate 70 with the filter sleeve 60 and the filter cover 40.

[0049] In the embodiment of the present invention, the number of the air outlet ends 521 is three, but it is not limited to what is disclosed in this embodiment and can also be adjusted according to the usage requirements. At the same time, the numbers of the extension openings 413, the first perforations 61 and the second perforations 71 are respectively set corresponding to the number of the air outlet ends 521.

[0050] Continue to refer to Figure 12 As shown, when the present invention is in use, the exhaust fan 20 starts to operate and sucks the external gas. The gas will first pass through the filter sleeve 60, and then pass through the air holes 42 of the filter cover 40 before reaching the air filter 30 for filtration. Then it flows through the air suction port 23 to the inside of the exhaust fan 20, and the gas is output through the air outlet ends 521 of the pressure fan 51 and the air outlet joint 52 through a pipeline (not shown in the figure) and is respectively connected to each protective clothing, so as to be able to separately deliver the clean gas to the inside of each protective clothing, and at the same time, it can prevent the staff from feeling stuffy due to wearing the protective clothing.

[0051] Thus, through the setting of the gas dispersion unit 50 of the present invention, the gas located inside the exhaust fan 20 can be output through the air outlet ends 521 of the air outlet joint 52 and is respectively connected to each protective clothing through each pipeline, so that the gas can be supplied for multiple people to use, thereby improving work efficiency. At the same time, the pressure fan 51 can provide a greater wind force, so that the gas content will not decrease due to being dispersed to each pipeline.

[0052] It is worth mentioning that, as shown in Figure 2 The pressing plate 70 presses against the top of the filter sleeve 60, and each fixing screw 73 located in each limiting groove 72 can be used to lock the pressing plate 70 with the filter sleeve 60 and the filter cover 40 to prevent the filter cover 40 and the filter sleeve 60 from shifting relative to the pressing plate 70.

[0053] In addition, the present invention combines the exhaust fan 20 and the air filter 30 on the trolley 10, so that the staff does not need to carry the heavy air filter 30, which can reduce the work burden and increase the flexibility of the mobile positive pressure air filtration structure 100 during movement.

Claims

1. A hand-pushed positive-pressure air filtration structure, characterized in that Comprising: A trolley; An exhaust fan fixedly installed on the trolley. The exhaust fan includes a base body and an air supply duct. The top of the base body is provided with an air extraction opening, and a coupling disc is formed around the air extraction opening. The coupling disc has an inner clamping portion, an outer clamping portion, a positioning screw and a limit screw. The inner wall surface and the outer wall surface of the coupling disc are respectively provided with the inner clamping portion and the outer clamping portion in a circumferential manner, and one end of the air supply duct communicates with the base body; An air filter coupled to the coupling disc of the exhaust fan, and the interior of the exhaust fan is communicated with the interior of the air filter through the air extraction opening. The air filter includes an outer filter element, an inner filter element and a filter core. The bottom of the outer filter element is provided with a first clamping portion, and the first clamping portion is engaged with the outer clamping portion. The inner filter element is located inside the outer filter element. The bottom of the inner filter element is provided with a second clamping portion, and the second clamping portion is engaged with the inner clamping portion. Moreover, an annular groove is formed inside the inner filter element corresponding to the second clamping portion. In addition, a filter material accommodating layer is formed inside the inner filter element, and the filter core is provided inside the filter material accommodating layer. The filter core is clamped in the annular groove so that the filter core and the inner filter element are integrated; A filter cover covering the air filter. The filter cover includes a cover body and a plurality of air holes penetrating through the cover body. The cover body has a top plate and four side plates extending downward from the edge of the top plate. The top plate is provided with a plurality of extension openings. In addition, a positioning plate is provided on the inner wall surface of one of the side plates of the cover body; A gas dispersion unit including an air outlet joint fixed to the positioning plate of the cover body and communicating with the air supply duct. The air outlet joint has a plurality of air outlet ends; A filter sleeve covering the filter cover. The filter sleeve is respectively provided with a first through hole corresponding to each extension opening of the cover body; A pressing plate pressing against the top of the filter sleeve. The pressing plate is respectively provided with a second through hole corresponding to each first through hole of the filter sleeve. Each air outlet end respectively passes through each extension opening and each first through hole and extends out from each second through hole.

2. The hand-pushed positive-pressure air filtration structure according to claim 1, wherein, The trolley includes a frame, a plurality of wheels and a bearing plate. The frame has a bottom frame portion and a handle portion. The handle portion extends vertically from the bottom frame portion. The wheels are fixedly installed at four corner positions below the bottom frame portion, and the bearing plate is screwed to the top of the bottom frame portion.

3. The hand-pushed positive-pressure air filtration structure according to claim 1, characterized in that, The exhaust fan further includes a positioning screw and a limit screw. The positioning screw horizontally penetrates through the inner clamping portion and the outer clamping portion, and a circumferential groove is recessed between the inner clamping portion and the outer clamping portion on the top surface of the coupling disc. The limit screw vertically penetrates through the circumferential groove and abuts against the positioning screw.

4. The hand-pushed positive-pressure air filtration structure according to claim 1, characterized in that, The gas dispersion unit further includes a pressurizing fan fixedly installed on the positioning plate of the cover body, and the pressurizing fan is connected to the other end of the air supply duct. The air outlet joint is communicated with the pressurizing fan.

5. The hand-pushed positive pressure air filtration structure according to claim 1, wherein, Limit grooves are respectively recessed on both side edges of the pressing plate, and each limit groove is respectively provided with a fixing screw. Each fixing screw locks the pressing plate with the filter sleeve and the filter cover.

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