CN102808791A - Mosquito-eradicating and dust-removing electric fan - Google Patents
Mosquito-eradicating and dust-removing electric fan Download PDFInfo
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- CN102808791A CN102808791A CN 201110157055 CN201110157055A CN102808791A CN 102808791 A CN102808791 A CN 102808791A CN 201110157055 CN201110157055 CN 201110157055 CN 201110157055 A CN201110157055 A CN 201110157055A CN 102808791 A CN102808791 A CN 102808791A
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- Prior art keywords
- tungsten filament
- dust
- fan
- ground connection
- high pressure
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 72
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 72
- 239000010937 tungsten Substances 0.000 claims abstract description 72
- 241000255925 Diptera Species 0.000 claims abstract description 54
- 239000000428 dust Substances 0.000 claims abstract description 34
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 11
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 230000005684 electric field Effects 0.000 claims description 15
- 239000012634 fragment Substances 0.000 claims description 14
- 238000009825 accumulation Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 238000005491 wire drawing Methods 0.000 claims description 10
- 230000005685 electric field effect Effects 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 claims 1
- 150000002500 ions Chemical class 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 6
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000005367 electrostatic precipitation Methods 0.000 description 4
- 238000000752 ionisation method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000035568 catharsis Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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Abstract
An electric fan that has the functions of both eradicating mosquitoes and removing dust is a multifunctional electric appliance. The working principle of high-voltage ionization and negative high-voltage neutralization dust-removing theory are utilized to the current electric fan so as to reduce the volume and thickness of a dust catcher, in which purple light spot is formed in the ground tungsten and a trace of carbon dioxide is released during the process of ionization so as to attract mosquitoes and eradicate them electrically under high voltage. Thus, an ordinary electric fan becomes a multifunctional electric appliance that can eradicate mosquitoes and remove dust at the same time. Air passes by the parts in the ionization area, and then the air is ionized under the function of high-voltage tungsten and ground tungsten, and positive ions are absorbed to the dust, the negative high-voltage in the metal wire neutralizes and absorbs the positive ions after passing by the parts in the dust collection area, after that, the air is driven by the vanes in the motor of the electric fan and then flows out from the rotating vanes so as to purify the air.
Description
Technical field
Kill mosquito dedusting electric fan relates to a kind of life staying idle at home articles for use; The working principle of high pressure ionization is applied on the existing electric fan; Make the electric fan of common simple function become the multifunctional household electrical appliance that has kill mosquito and dedusting function simultaneously. kill mosquito dedusting electric fan carries out circulative convection through motor to the air in the environment, except bringing the effect of cooling to human body, also uses the technology of high pressure ionization; Dust in air is carried out ionization; Utilize in the negative high voltage again and the dust suction of dust suction method, reach the purpose of dust in purifying air, on electrode, can form the purple hot spot of some and the carbon dioxide of generation trace when work night; Mosquito is attracted by purple hot spot and carbon dioxide, and mosquito is eliminated by electric shock under the high-tension electricity effect.
Background technique
Existing electric fan generally only possesses the effect that human body is lowered the temperature; Control feature on more subsidiary electrical equipment (rotating speed control, time control) also has the difference (floor model on some external forms; Desk-top; Wall-hanging), though fan all possesses the circulative convection effect to air, do not possess catharsis to air.Human body respiration can absorb the particulate below 2 microns, contains partly harmful matter in the particulate, particularly lives in the industrial relatively advanced city, influences the healthy of people.
Existing electrostatic precipitation mode has the efficient height, and air velocity is fast, and purification function is strong, the advantage of high pressure sterilization.Fig. 1 is the fundamental diagram of common electrostatic precipitation, adopts one pole tungsten filament ionization method of work, and high pressure tungsten filament 1 is fixed on the hardboard 2; Ground connection dust-collecting plate 3 places the both sides of hardboard 2 respectively, and high voltage electric field is added between hardboard 2 and the ground connection dust-collecting plate 3, according to the principle of inhomogeneous high voltage electric field point discharge; Form the discharge current of emitting shape between high pressure tungsten filament 1 and the both sides ground connection dust-collecting plate 3, air stream is between high pressure tungsten filament 1 and ground connection dust-collecting plate 3, in inhomogeneous high voltage electric field; Air is produced positive ion by ionization, and positive ion is adsorbed on the airborne dust; Dust becomes positively charged ion, and when dust was flowed through hardboard 2 and ground connection dust-collecting plate 3, dust positively charged under the high voltage electric field effect formed drift; Accumulate on the ground connection dust-collecting plate 3, reach the purpose of removing dust.
But this common electrostatic precipitation mode exists some defectives:
1. high pressure tungsten filament 1 is fixed on the hardboard 2; Ionized region and accumulation area form an integral body, when the distance of the position of high pressure tungsten filament 1 and ground connection dust-collecting plate 3 reaches optimum, will reduce the distance of hardboard 2 and ground connection dust-collecting plate 3; Cause hardboard 2 and ground connection dust-collecting plate 3 sparking or electric discharge phenomena to occur; Reduce the effect of control of dust, ionized region and accumulation area interact between the two, can't reach perfect condition.
2. ionized region and accumulation area constitute an overall structure, because volume can't be applied to more greatly on the cooling equipment such as existing electric fan, the function of product is more single.
3. because the high pressure ionization working principle is used the uneven field operation principle of ball and plate, the efficient of ionization is not high.
4. high voltage electric field for the large-scale particulate matter that prevents mosquito and so on gets into machine, causes the machine sparking in when work, and short circuit and can't working all can increase a filter screen and prevent that larger particles from getting into machine at the wind inlet place.
5. because sheared edge appears in hardboard 2 after punching press, the discharge current on the electrode has been offset in the discharge that tapers off to a point during work, the service behaviour of ionization is unstable.
The working principle of ordinary electronic mosquito killing device is: utilize the light of ultraviolet lamp and the carbon dioxide of photocatalysis generation to attract mosquito, utilize high-tension electricity that the mosquito electric shock is eliminated again; But because the light of ultraviolet lamp is too strong, not only the attraction force to mosquito is little, and light intensity also has influence on people's sleep, and the effect of kill mosquito is relatively poor.
Summary of the invention
The objective of the invention is electric fan, electronic mosquito killer, three kinds of characteristics of air dust remover organically combine, and are applied to the working principle of high pressure ionization on the common rotating vane electric fan; The plain edition deduster is because volume is big, and weight is big, can't be installed on the electric fan; In order to reduce the volume and weight of deduster; Kill mosquito dedusting electric fan adopts flat dedusting structure, ionized region assembly and accumulation area components apart, and ionized region adopts the spatial triangle structure; Accumulation area has adopted metal wire-drawing net 5 structures, and its volume ratio common electrostatic duster is little about 10 times.Common electronic mosquito killer, the light of employing ultraviolet lamp, the carbon dioxide that the photocatalysis mode produces attracts mosquito, with high-tension electricity the mosquito electric shock is eliminated again, reaches except that the mosquito purpose, and its volume is also very big, can't be installed on the electric fan; And the purple hot spot that kill mosquito dedusting electric fan forms on the ground connection tungsten filament 4 when utilizing high pressure ionization; And the dust on ground connection tungsten filament 4 surface are carbonized the carbon dioxide that is produced and attract mosquito in the ionization process when ionization; With high-tension electricity the mosquito electric shock is eliminated again, reached except that the mosquito purpose.
The working principle of kill mosquito dedusting electric fan ionization: adopt the non-uniform electric field working principle between ball and the ball; The nonuniformity of electric field is greatly improved; A spot of negative ion forms positive corona in the inhomogeneous high voltage electric field that around high pressure tungsten filament 1, utilizes high pressure tungsten filament 1 and the air, a spot of positive ion formation negative corona near the inhomogeneous high voltage electric field that ground connection tungsten filament 4, then utilizes ground connection tungsten filament 4 and the air, electronics original minority electrons in air of negative corona generation; High-speed motion is near high pressure tungsten filament 1; Electronics collides with air molecule around high pressure tungsten filament 1, and air generation ionization produces a large amount of positive ions. and positive ion is outwards motion at a high speed under the strong electrical field effect; A part of positive ion is adsorbed on the dust bigger in the air; After some impinges upon tiny particulate, be adsorbed on the ground connection tungsten filament 4, dust removal efficiency is greatly improved.
Fig. 2 is the dedusting fundamental diagram of kill mosquito dedusting electric fan: high voltage electric field is added between high pressure tungsten filament 1 and the ground connection tungsten filament 4; High pressure tungsten filament 1 forms the ionization utmost point with ground connection tungsten filament 4; The negative high voltage electric field is added on the metal wire-drawing net 5, and air is through after the ionization, when airborne positive ion and dust are flowed through metal wire-drawing net 5; Positive ion and dust are reached the purpose of dedusting by in the negative high voltage electric field and absorb.
Kill mosquito dedusting electric fan attracts mosquito in order on ground connection tungsten filament 4, to obtain the purple hot spot; Quoted the space ionization technique of " bipolar system air dust remover (patent No. 200910152380.X) "; Electrodes use spatial triangle arrangement mode not only increased the useful area of ionization space, and ground connection tungsten filament 4 receives four high pressure tungsten filament 1 effect of electric field on every side simultaneously; Dust is carbonized on ground connection tungsten filament 4 surfaces; Discharge the carbon dioxide and the purple hot spot that forms some of trace, the photometric brightness of purple hot spot is less than a common light emitting diode of 3 millimeters, and is approximate with the phosphorescence of occurring in nature; Attraction force to mosquito is bigger, and the effect of kill mosquito is than the strong several times of common electronic mosquito killer.Not only can replace existing electronic mosquito killer, and can also reduce the use amount of mosquito-repellent incense, save resource.
The working principle of kill mosquito dedusting electric fan control of dust has been quoted in " bipolar system air dust remover (patent No. 200910152380.X) " negative high voltage and the dust suction method; Adopt one pole negative high voltage dust suction principle; Utilize the neutralization of negative high voltage to adsorb the dust on the positive ion; In order to reduce the volume of dust-collecting plate, kill mosquito dedusting electric fan has adopted metal wire-drawing net 5 as dust-collecting plate.
Fig. 3 is the high pressure output principle figure of common high-voltage power: oscillation boosting coil 6 charges through 7 pairs of high-voltage capacitances 8 of high-voltage diode; The high-tension resistive 9 that one 500 megaohm is arranged between high-voltage output end 10 and the grounding end 11, the high-tension electricity on the high-voltage capacitance 8 of outage back is through high-tension resistive 9 discharges.
Fig. 4 is the high pressure output principle figure of positive or negative high voltage power supply: oscillation boosting coil 6 charges through 7 pairs of high-voltage capacitances 8 of high-voltage diode; The high-tension resistive 9 that one 500 megaohm is arranged between high-voltage output end 10 and the negative high voltage output terminal 12; High-tension electricity on the high-voltage capacitance 8 of outage back is through high-tension resistive 9 discharges; Electric current is excessive when preventing kill mosquito, sends bigger sound, on high-voltage output end 10, has increased a threshold currents resistance 13.
Major technique characteristic of the present invention: air gets into the ionized region assembly in the middle of the fan bonnet, and the ionized region assembly comprises on the tungsten filament carriage, under the tungsten filament carriage, and high pressure tungsten filament, ground connection tungsten filament, high pressure guide card and ground connection guide card; Under the high voltage electric field effect, air is discharged positive ion by ionization; Positive ion is adsorbed on the dust, in ionization process, can form the purple hot spot on the ground connection tungsten filament; Small dust is carbonized on ground connection tungsten filament surface, discharges the carbon dioxide of trace, and purple hot spot and carbon dioxide attract mosquito; The mosquito elimination of being shocked by electricity, thus reach purpose except that mosquito, and mosquito can send bigger sound when electric shock; Have influence on people's sleep,, increase the sound that current-limiting resistance reduces to shock by electricity at high-voltage output end for the sound that reduces to shock by electricity.
Air is come the accumulation area assembly with the dust that has positive ion, and the accumulation area assembly comprises rack, metal wire-drawing net, negative high voltage guide card; Positive ion and dust are absorbed neutralization rapidly under the negative high voltage electric field action, it is online to accumulate in metal wire-drawing.
Final purification air drive from the rotating vane sheet through motor blower fan and discharge, thereby the purpose that reaches kill mosquito and purify air.
Description of drawings
Fig. 1 is the fundamental diagram of common electrostatic precipitation
Fig. 2 is the dedusting fundamental diagram of kill mosquito dedusting electric fan
Fig. 3 is the high pressure output principle figure of common high-voltage power
Fig. 4 is the high pressure output principle figure of positive or negative high voltage power supply
Fig. 5 is embodiment's mounting structure figure of ground connection tungsten filament
Fig. 6 is embodiment's mounting structure figure of high pressure tungsten filament
Fig. 7 is a kill mosquito dedusting electric fan embodiment sectional view
1. high pressure tungsten filaments among the figure; 2. hardboard; 3. ground connection dust-collecting plate; 4. ground connection tungsten filament; 5. metal wire-drawing net; 6. oscillation boosting coil; 7. high-voltage diode; 8. high-voltage capacitance; 9. high-tension resistive; 10. high-voltage output end; 11. grounding end; 12. negative high voltage output terminal; 13. current-limiting resistance; 14. terminal; 15. ground connection guide card; 16. high pressure guide card; 17. under the tungsten filament carriage; 18. on the tungsten filament carriage; 19. screw; 20. motor blower fan; 21. motor; 22. fan fore shell; 23. fan bonnet; 24. time-controller; 25. speed regulator; 26. rotating vane sheet; 27. bucket cover; 28. sensitive switch; 29. grounding elastic part; 30. insulation board A; 31. high pressure shell fragment; 32. insulation board B; 33. negative high voltage shell fragment; 34. insulation board C; 35. dust-removing cover; 36. positive or negative high voltage power supply; 37. supporting frame; 38. rack; 39 negative high voltage guide cards
Embodiment
In embodiment's mounting structure figure of ground connection tungsten filament shown in Figure 5; A terminal 14 is respectively riveted at the two ends of ground connection tungsten filament 4; Ground connection guide card 15 is placed under the tungsten filament carriage on 17 the A point position, puts into 10 ground connection tungsten filaments 4 respectively on the aperture position of 17 left side notches and ground connection guide card 15 under the tungsten filament carriage.
In embodiment's mounting structure figure of high pressure tungsten filament shown in Figure 6; With 18 being put under the tungsten filament carriage that installs ground connection tungsten filament 4 17 top on the tungsten filament carriage; With 4 screws 19 with on the tungsten filament carriage 18 with the tungsten filament carriage under 17 be connected tight; Be put into high pressure guide card 16 under the tungsten filament carriage on 17 the B point position, a terminal 14 is respectively riveted at the two ends of high pressure tungsten filament 1,9 high pressure tungsten filaments 1 is installed to respectively on the tungsten filament carriage in the right notch of 18 on the aperture position with left side high pressure guide card 16; By same mode, other 9 high pressure tungsten filaments 1 are installed in the right notch of 17 bottoms under the tungsten filament carriage on the aperture position with left side high pressure guide card 16.
In kill mosquito dedusting electric fan embodiment sectional view shown in Figure 7; Motor blower fan 20 is installed on the motor 21; Motor 21 is fixed on the fan fore shell 22; Time-controller 24 is installed on the fan fore shell 22 with speed regulator 25, is placed on rotating vane sheet 26 on fan fore shell 22 jack shafts, and bucket cover 27 is installed to rotating vane sheet 26 fronts.
Sensitive switch 28 is fixed on the fan bonnet 23, and grounding elastic part 29 is riveted on the insulation board A30, and insulation board A30 is fixed on the fan bonnet 23; High pressure shell fragment 31 is riveted on the insulation board B32; Insulation board B32 is fixed on the fan bonnet 23, and negative high voltage shell fragment 33 is riveted on the insulation board C34, and insulation board C34 is fixed on the fan bonnet 23; With screw fan bonnet 23 and fan fore shell 22 are linked together, dust-removing cover 35 is contained on the fan bonnet 23.
Positive or negative high voltage power supply 36 is fixed on the supporting frame 37; Supporting frame 37 links together with fan fore shell 22 and fan bonnet 23; The high-voltage output end 10 of positive or negative high voltage power supply 36 is connected on the high pressure shell fragment 31 through lead-in wire; Negative high voltage output terminal 12 is connected on the negative high voltage shell fragment 33 through lead-in wire, and grounding end 11 is connected on the grounding elastic part 29 through drawing silk.
Metal wire-drawing net 5 is contained on the rack 38, and negative high voltage guide card 39 is equipped with in rack 38 belows, opens dust-removing cover 35; Sensitive switch 28 outage is packed rack 38 in the fan bonnet 23 into, and negative high voltage guide card 39 contacts with negative high voltage shell fragment 33; With on the tungsten filament carriage 18 with the tungsten filament carriage under 17 assembly parts put into fan bonnet 23, ground connection guide card 15 contacts with grounding elastic part 29, high pressure guide card 16 contacts with high pressure shell fragment 31; The dust-removing cover 35 that closes, sensitive switch 28 is connected.
Claims (7)
1. kill mosquito dedusting electric fan wherein, comprising:
The fan fore shell, fan bonnet, dust-removing cover, sensitive switch; Ionized region assembly and the high pressure tungsten filament of forming the ionized region assembly, the ground connection tungsten filament, terminal, on the tungsten filament carriage, under the tungsten filament carriage, ground connection guide card, high pressure guide card, screw; Accumulation area assembly and the rack of forming the accumulation area assembly, metal wire-drawing net, negative high voltage guide card; The positive or negative high voltage power supply, current-limiting resistance, high pressure shell fragment, negative high voltage shell fragment, grounding elastic part, motor, motor blower fan, rotating vane sheet, bucket cover, supporting frame, time-controller, speed regulator.
2. kill mosquito dedusting electric fan as claimed in claim 1, wherein:
Dust-removing cover is contained on the fan bonnet with the button bit mode, and dust-removing cover is pressed on the sensitive switch during work, and the sensitive switch outage through the dust-removing cover aperture position, is taken out ionized region assembly and accumulation area assembly safely when taking out dust-removing cover.
3. kill mosquito dedusting electric fan as claimed in claim 1, wherein:
The ionized region assembly comprises the high pressure tungsten filament, the ground connection tungsten filament, and terminal is on the tungsten filament carriage; Under the tungsten filament carriage, ground connection guide card, high pressure guide card, screw; Arrange by the spatial triangle mode between high pressure tungsten filament and the ground connection tungsten filament, the high pressure guide card contacts with the high pressure shell fragment, and the ground connection guide card contacts with grounding elastic part.
4. kill mosquito dedusting electric fan as claimed in claim 1, wherein:
The accumulation area assembly comprises rack, the metal wire-drawing net, and the negative high voltage guide card, the negative high voltage guide card contacts with the negative high voltage shell fragment.
5. kill mosquito dedusting electric fan as claimed in claim 1, wherein:
High-voltage power is used the positive or negative high voltage power supply, has increased a current-limiting resistance at high-voltage output end, and high-voltage output end connects the high pressure shell fragment, and the negative high voltage output terminal connects the negative high voltage shell fragment, and grounding end connects grounding elastic part.
6. kill mosquito dedusting electric fan as claimed in claim 1, wherein:
The principle of kill mosquito is: the ground connection tungsten filament is when ionization; High pressure tungsten filament effect of electric field was by ionization around dust in air received the ground connection tungsten filament; Dust is adsorbed on ground connection tungsten filament surface and carbonization gradually, discharges the carbon dioxide of trace, and ground connection tungsten filament surface can form the purple hot spot of some simultaneously; Purple hot spot and carbon dioxide attract mosquito, and mosquito is eliminated by electric shock under the high voltage electric field effect.
7. kill mosquito dedusting electric fan as claimed in claim 1, wherein:
The positive or negative high voltage power supply is fixed on the supporting frame, and motor blower fan is contained on the motor, and motor is fixed on the fan fore shell, and the rotating vane sheet is contained on the fan fore shell, and time-controller and speed regulator are installed on the fan fore shell, and bucket cover is contained on the fan fore shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110157055 CN102808791A (en) | 2011-06-01 | 2011-06-01 | Mosquito-eradicating and dust-removing electric fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110157055 CN102808791A (en) | 2011-06-01 | 2011-06-01 | Mosquito-eradicating and dust-removing electric fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102808791A true CN102808791A (en) | 2012-12-05 |
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ID=47232612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110157055 Pending CN102808791A (en) | 2011-06-01 | 2011-06-01 | Mosquito-eradicating and dust-removing electric fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102808791A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509705A (en) * | 2017-09-11 | 2017-12-26 | 中国农业大学 | A kind of plasma tribo-luminescence device of wind drive |
| CN107725430A (en) * | 2017-09-27 | 2018-02-23 | 宁波东曜电器有限公司 | A kind of electric fan of accumulatingdust |
| CN110262646A (en) * | 2019-06-28 | 2019-09-20 | 苏州浪潮智能科技有限公司 | A kind of dust-proof fan |
| CN110574950A (en) * | 2018-06-11 | 2019-12-17 | 吴朋洋 | Roasted food turns over stir-fry dust collector |
| CN113994943A (en) * | 2021-11-04 | 2022-02-01 | 邓丽娟 | Passive building intelligent energy-saving control device |
-
2011
- 2011-06-01 CN CN 201110157055 patent/CN102808791A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509705A (en) * | 2017-09-11 | 2017-12-26 | 中国农业大学 | A kind of plasma tribo-luminescence device of wind drive |
| CN107725430A (en) * | 2017-09-27 | 2018-02-23 | 宁波东曜电器有限公司 | A kind of electric fan of accumulatingdust |
| CN110574950A (en) * | 2018-06-11 | 2019-12-17 | 吴朋洋 | Roasted food turns over stir-fry dust collector |
| CN110262646A (en) * | 2019-06-28 | 2019-09-20 | 苏州浪潮智能科技有限公司 | A kind of dust-proof fan |
| CN113994943A (en) * | 2021-11-04 | 2022-02-01 | 邓丽娟 | Passive building intelligent energy-saving control device |
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Application publication date: 20121205 |