TWM571739U - Desktop air purifier - Google Patents

Abstract

The present invention discloses a desktop air purifying device comprising a gas guiding device, an ozone-free ultraviolet sterilizing device, a hollow cylindrical filter, a detachable hollow sleeve, a bottom cover and a top ring. The ozone-free ultraviolet sterilizing device is disposed at the bottom of the air guiding device, the hollow cylindrical filter surrounds the ozone-free ultraviolet sterilizing device, and the detachable hollow sleeve is sleeved on the air guiding device and the hollow cylindrical filter. The bottom cover is disposed at the bottom of the detachable hollow sleeve, and the top ring is disposed at the top of the detachable hollow sleeve and the air guiding device, and the air guiding device attracts air to purify the air by using ultraviolet rays, and then extracts the air. The desktop air purifying device of the present invention not only has a small volume and does not occupy a space, but also absorbs a large amount of air to effectively purify the air.

Description

Desktop air purifier

This creation relates to a purification device, and more particularly to a desktop air purification device.

According to the progress of society and the rapid development of the industrial and commercial industry, people enjoy all kinds of daily necessities that are extremely convenient and comfortable in daily life, but they must also endure various environmental pollutions in the living environment; The impact of air pollution is the most serious. Humans can not eat for a few days, do not drink water for several hours, but they can't breathe for dozens of minutes, and the aerosols present in the air, the exhaust gas from the steam locomotive, and the factory discharge. The black smoke and toxic gases, and even the cigarette gas that people make when they smoke, affect people all the time, so that in the air that people breathe every day, there are various kinds of dust and exhaust gas that will endanger the health of the human body. Bacteria, mold, soot, particles and pollen have caused many people to feel that breathing is not smooth, nose allergies, and even people feel incompetent and tired after inhaling too much of this type of gas.

As a result, many companies have developed various types of air purifiers to purify the surrounding air, improve air quality, and allow people to breathe healthily; however, look at the various types of air on the market. The cleaning machine has a relatively large volume, which causes it to occupy a space on the placement, and the power supply wire may be mixed with pedestrians or obstruct the moving articles, which causes great inconvenience in use. In addition, in order to maintain the indoor air quality, some people will also choose the ozone machine, thinking that through the ozone machine, the virus in the air can kill the light. Or use ozone ultraviolet light with a wavelength of 185 nm to sterilize the oxygen in the air into ozone. However, the National Biotechnology and Medical Industry Policy Council pointed out that ozone does have the function of sterilization and epidemic prevention, but it is not enough to kill the virus; and doctors also cautioned that it is necessary to carefully control the concentration when using the ozone machine. If the concentration is too high, I am afraid It will stimulate the respiratory tract and affect some lung function. Even negative ions are used on the market to improve air quality. However, when combined with air dust, negative ions are adsorbed on the wall, causing the living environment to be dirty.

Therefore, the present invention has proposed a desktop air purifying device to solve the problems caused by the above problems.

The main purpose of the present invention is to provide a desktop air purifying device which installs an ozone-free ultraviolet sterilizing device or an activated carbon particle filter in a hollow cylindrical filter to make the overall volume small, so that not only does not occupy space, It can also absorb a large amount of air to effectively purify the air by using ultraviolet or activated carbon particle filters emitted from ozone-free ultraviolet lamps to improve the air quality.

In order to achieve the above object, the present invention provides a desktop air purifying device comprising a gas guiding device, an ozone-free ultraviolet sterilizing device, a hollow cylindrical filter, a removable hollow sleeve and a bottom cover. With a top ring. The ozone-free ultraviolet sterilizing device is disposed at the bottom of the air guiding device and emits ultraviolet rays, wherein the ultraviolet ray has a wavelength of 200 to 275 nm. The hollow cylindrical filter surrounds the ozone-free UV sterilizing device and abuts against the bottom edge of the air guiding device. The side wall of the detachable hollow sleeve has a plurality of vent holes penetrating through itself, and the detachable hollow sleeve is sleeved on the air guiding device and the hollow cylindrical filter. The bottom cover is disposed at the bottom of the detachable hollow sleeve, and the top ring is disposed at the top of the detachable hollow sleeve and the air guiding device, and the air guiding device attracts air through the vent hole to purify the air by using ultraviolet rays, and then deriving air.

In an embodiment of the present invention, the air guiding device further includes an upper casing, a lower casing, a fan controller, a first side casing, a power plug, a power switch, and a second side casing. A wind top cover, an electric fan, a speed control knob and a cap. The top and bottom of the upper casing respectively have an upper groove and an upper opening, and the upper groove communicates with the upper opening. The lower casing has a lower opening penetrating through itself, the lower casing is fixed to the upper casing to communicate the lower opening and the upper opening, the ozone-free ultraviolet sterilizing device is fixed to the bottom of the lower casing, and the hollow cylindrical filter is abutted against the lower casing The bottom edge. The fan controller is disposed on a side of the upper casing, and the first side casing is fixed to the upper casing to shield the fan controller. The second side casing is fixed to the lower casing, and the side wall of the second side casing has an opening penetrating through itself. The power plug and the power switch are disposed on the second side casing, and the power plug is electrically connected to the fan controller through the power switch, and the opening exposes the power plug and the top of the power switch outlet top cover has a plurality of air outlet gaps, and the bottom has a concave The groove and the lower groove communicate with the wind gap, and the outlet top cover is fixed to the upper casing to connect the upper groove and the lower groove, the top ring is fixed to the outlet top cover, and the detachable hollow sleeve is sleeved with the upper casing The body, the first side casing, the second side casing and the air outlet top cover, the detachable hollow sleeve has a power supply opening through itself, and the power supply opening communicates with the opening. The electric fan is located in the upper groove and the lower groove, and is fixed to the outlet top cover, and the electric fan is electrically connected to the electric fan controller. When the power switch is turned on, the power plug receives the DC voltage and supplies it to the fan controller through the power switch to activate the fan, thereby attracting air through the vent hole, and purifying the air by using ultraviolet rays, and then sequentially passing through the lower opening and the upper portion. The opening, the upper groove, the lower groove and the air outlet are used to extract air. The speed control knob is provided with a fan, and is electrically connected to the fan controller, and the cap is disposed at the top of the speed control knob. When the power switch is turned on, the power plug provides a DC voltage to the fan controller through the power switch to activate the fan with the speed control knob, and then attracts air through the vent hole.

In an embodiment of the present invention, the ozone-free ultraviolet sterilizing device further comprises a hollow cover, an ultraviolet protection plate, two lamp holders, an ozone-free ultraviolet lamp tube and a lamp tube starter. The hollow cover is fixed to the bottom of the lower casing, and the inner space of the hollow cover communicates with the lower opening. The ultraviolet shielding plate has different first and second faces, the ultraviolet shielding plate is fixed on the hollow cover, and part of the ultraviolet shielding plate is located in the inner space. The lamp holder is disposed on the first surface of the ultraviolet protection board and electrically connected to the power switch. The ozone-free UV lamp is arranged on the lamp holder to electrically connect the lamp holder. The lamp starter is disposed on the second surface of the ultraviolet protection board and electrically connected to the power switch and the lamp holder. When the power switch is turned on, the lamp starter receives a DC voltage to activate the ozone-free UV lamp through the lamp holder to emit ultraviolet light.

In an embodiment of the present invention, the hollow cylindrical filter further comprises a High Efficiency Generation Particulate Air (HEPA) filter and an activated carbon filter. The high efficiency air particulate filter surrounds the hollow cover, the UV shield, the lamp holder, the ozone-free UV lamp and the lamp starter, and abuts against the bottom edge of the lower casing. The activated carbon filter surrounds and abuts the high efficiency air particulate filter.

In an embodiment of the present invention, the lower case is fixed to the upper case by the first screw, the first side case is fixed to the upper case by the second screw, and the second side case is fixed to the lower case by the third screw. The air outlet cover is fixed to the upper casing by the fourth screw, and the top ring is fixed to the air outlet top cover by the fifth screw, and the electric fan is fixed to the air outlet top cover by the sixth screw, and the hollow cover is fixed by the seventh screw. The bottom of the lower case.

In one embodiment of the present invention, the ozone-free ultraviolet sterilizer is replaced by an activated carbon particulate filter to filter the air.

In an embodiment of the present invention, the activated carbon particle filter further comprises a hollow cover, a filter cover, a first porous hollow cylinder, a second porous hollow cylinder and a plurality of activated carbon particles. The hollow cover is fixed to the bottom of the lower casing, and the inner space of the hollow cover communicates with the lower opening. The filter cover has a plurality of filter holes penetrating through itself, and the filter cover is fixed on the hollow cover to connect the inner space of the filter hole and the hollow cover. The first porous hollow cylinder and the second porous hollow cylinder are fixed on the filter cover, and the first porous hollow cylinder and the second porous hollow cylinder communicate with the filter hole, and the first porous hollow cylinder surrounds a second porous hollow cylinder, and the first porous hollow cylinder is spaced apart from the second porous hollow cylinder. The activated carbon particles are located between the first porous hollow cylinder and the second porous hollow cylinder.

In order to give your reviewers a better understanding and understanding of the structural features and the efficacies of the creation, please refer to the preferred embodiment diagrams and detailed explanations to illustrate:

The embodiments of the present application will be further explained below in conjunction with the related drawings. Wherever possible, the same reference numerals in the drawings In the drawings, shapes and thicknesses may be exaggerated based on simplification and convenient labeling. It is to be understood that the elements not specifically shown in the drawings or described in the specification are those of ordinary skill in the art. A variety of changes and modifications can be made by those of ordinary skill in the art in light of the present disclosure.

Referring to Figures 1, 2 and 3, a first embodiment of the desktop air purification device of the present invention will be described. The desktop air purifying device of the present invention comprises a gas guiding device 10, an ozone-free ultraviolet sterilizing device 12, a hollow cylindrical filter 14, a detachable hollow sleeve 16, a bottom cover 18 and a top ring 20. The ozone-free ultraviolet sterilizing device 12 is disposed at the bottom of the air guiding device 10 and emits ultraviolet rays, wherein the ultraviolet rays have a wavelength of 200 to 275 nm. Ultraviolet sterilizing is to destroy and change the structure of the DNA of the microorganisms by ultraviolet radiation, so that the bacteria immediately die or cannot reproduce the offspring and achieve the purpose of sterilization. The true bactericidal effect is ultraviolet light with a wavelength of 200 to 275 nm, because the ultraviolet light in this band is easily absorbed by the DNA of the living body, especially the ultraviolet light having a wavelength of about 253.7 nm. The hollow cylindrical filter 14 surrounds the ozone-free ultraviolet sterilizing device 12 and abuts against the bottom edge of the air guiding device 10, so that the overall volume of the desktop air purifying device is reduced, so that not only does not occupy space, but also can absorb a large amount of air. The use of ultraviolet rays emitted from the ozone-free ultraviolet sterilizing device 12 or effective air purification achieves the demand for improved air quality. The side wall of the removable hollow sleeve 16 has a plurality of vent holes 22 therethrough, and the detachable hollow sleeve 16 is sleeved on the air guiding device 10 and the hollow cylindrical filter 14. The bottom cover 18 is disposed at the bottom of the detachable hollow sleeve 16, and the top ring 20 is disposed at the top of the detachable hollow sleeve 16 and the air guiding device 10. The air guiding device 10 attracts air through the vent hole 22 to Use ultraviolet light to purify the air and then export the air.

The air guiding device 10 further includes an upper casing 24, a lower casing 26, a fan controller 28, a first side casing 30, a power plug 32, a power switch 34, a second side casing 36, and a The air outlet cover 38, a fan 40, a speed control knob 42 and a cap 44. The top and bottom of the upper housing 24 have an upper recess 46 and an upper opening 48, respectively, and the upper recess 46 communicates with the upper opening 48. The lower casing 26 has a lower opening 50 therethrough, and the lower casing 26 is fixed to the upper casing 24 by a first screw 27 to communicate the lower opening 50 and the upper opening 48, and the ozone-free ultraviolet sterilizing device 12 is fixed to the lower casing 26 At the bottom, the hollow cylindrical filter 14 abuts against the bottom edge of the lower casing 26. The fan controller 28 is disposed on the side of the upper casing 24, and the first side casing 30 is fixed to the upper casing 24 by the second screw 31 to shield the fan controller 28. The second side housing 36 is fixed to the lower housing 26 by a third screw 37, and the side wall of the second side housing 36 has an opening 52 therethrough. The power plug 32 and the power switch 34 are disposed on the second side casing 36. The power plug 32 is electrically connected to the fan controller 28 through the power switch 34, and the opening 52 exposes the power plug 32 and the power switch 34. The top of the air outlet cover 38 has a plurality of air outlet gaps 54. The bottom portion has a lower recess 56. The lower recess 56 communicates with the wind gap 54. The air outlet top cover 38 is fixed to the upper casing 24 by a fourth screw 39 for communication. The upper groove 46 and the lower groove 56 are fixed to the air outlet top cover 38 by the fifth screw 41, and the removable hollow sleeve 16 is sleeved with the upper casing 24, the first side casing 30, and the second The side housing 36 and the air outlet top cover 38, the removable hollow sleeve 16 has a power supply opening 58 therethrough, and the power supply opening 58 communicates with the opening 52. The fan 40 is located in the upper recess 46 and the lower recess 56, and is fixed to the air outlet cover 38 by the sixth screw 43, and the fan 40 is electrically connected to the fan controller 28. When the power switch 34 is turned on, the power plug 32 receives the DC voltage and supplies it to the fan controller 28 through the power switch 34 to activate the fan 40, thereby attracting air through the vent hole 22, and purifying the air by using the ultraviolet ray. The air is discharged through the lower opening 50, the upper opening 48, the upper groove 46, the lower groove 56, and the air outlet gap 54. The speed control knob 42 is disposed through the electric fan 40 and electrically connected to the electric fan controller 28, and the cap 44 is disposed at the top of the speed control knob 42. When the power switch 34 is turned on, the power plug 32 provides a DC voltage to the fan controller 28 through the power switch 34 to activate the fan 40 in conjunction with the speed control knob 42 to attract air through the vent hole 22. The speed control knob 42 controls the rotational speed of the electric fan 40.

The ozone-free ultraviolet sterilizing device 12 further includes a hollow cover 60, an ultraviolet protection plate 62, two lamp holders 64, an ozone-free ultraviolet lamp tube 66 and a lamp starter 68. The hollow cover 60 is fixed to the bottom of the lower casing 26 by a seventh screw 61, and the inner space of the hollow cover 60 communicates with the lower opening 50. The ultraviolet shielding plate 62 has different first and second faces, the ultraviolet shielding plate 62 is fixed on the hollow cover 60, and a part of the ultraviolet shielding plate 62 is located in the inner space of the hollow cover 60, and the ultraviolet shielding plate 62 is used. To avoid deterioration of surrounding components due to ultraviolet radiation. The lamp holder 64 is disposed on the first surface of the ultraviolet protection panel 62 and electrically connected to the power switch 34. The ozone-free ultraviolet lamp tube 66 is disposed on the lamp holder 64 to electrically connect the lamp holder 64. The lamp starter 68 is disposed on the second surface of the ultraviolet protection plate 62 and electrically connected to the power switch 34 and the lamp holder 64. When the power switch 34 is turned on, the lamp starter 68 receives a DC voltage to activate the ozone-free ultraviolet lamp 66 through the lamp holder 64 to emit ultraviolet rays.

The hollow cylindrical filter 14 further includes a high-efficiency air particulate (HEPA) filter 70 and an activated carbon filter 72. The high efficiency air particulate filter 70 surrounds the hollow cover 60, the ultraviolet shield 62, the socket 64, the ozone-free UV lamp 66 and the lamp starter 68, and abuts against the bottom edge of the lower casing 26. The activated carbon filter 72 surrounds and abuts the high efficiency air particulate filter 70. The high-efficiency air particulate filter 70 and the activated carbon filter 72 are used to protect the ozone-free ultraviolet lamp 66 to keep it clean and highly transparent, and are not used for purifying air, so the high-efficiency air particulate filter 70 and activated carbon The volume of the filter 72 is also small, so that the entire desktop air purification device does not take up space.

The operation of the first embodiment of the desktop air purification apparatus of the present invention will be described below. When the power switch 34 is turned on, the power plug 32 receives the DC voltage and supplies it to the fan controller 28 and the lamp starter 68 through the power switch 34, so that the lamp starter 68 activates the ozone-free ultraviolet lamp through the lamp holder 64. The tube 66, in turn, emits ultraviolet light, and the fan controller 28 cooperates with the speed control knob 42 to activate the fan 40, and then sucks air through the vent hole 22. The air sequentially passes through the activated carbon filter 72 and the high efficiency air particle filter 70, and then uses ultraviolet rays. The air is purged, and air is then exhausted through the lower opening 50, the upper opening 48, the upper groove 46, the lower groove 56, and the air outlet gap 54 in sequence.

In the first embodiment, the ozone-free ultraviolet sterilizing device 12 can be replaced by an activated carbon particle filter to filter the air, so that it can be the second embodiment of the present invention. Please refer to FIG. 4, FIG. 5 and FIG. 6, and a second embodiment of the desktop air purifying apparatus of the present invention will be described. The activated carbon particle filter 74 of the second embodiment further comprises a hollow cover 76, a filter cover 77, a first porous hollow cylinder 78, a second porous hollow cylinder 80 and a plurality of activated carbon particles 82. The hollow cover 76 is fixed to the bottom of the lower casing 26, and the inner space of the hollow cover 76 communicates with the lower opening 50. The filter cover 77 has a plurality of filter holes 83 therethrough, and the filter cover 77 is fixed to the hollow cover 76 to communicate the internal space of the filter hole 83 and the hollow cover 76. The first porous hollow cylinder 78 and the second porous hollow cylinder 80 are fixed to the filter cover 77, and the first porous hollow cylinder 78 and the hole of the second porous hollow cylinder 80 communicate with the filter hole 83, first The porous hollow cylinder 78 surrounds the second porous hollow cylinder 80, and the first porous hollow cylinder 78 is spaced apart from the second porous hollow cylinder 80. The activated carbon particles 82 are located between the first porous hollow cylinder 78 and the second porous hollow cylinder 80.

In summary, the present invention installs an ozone-free ultraviolet sterilizing device or an activated carbon particle filter in a hollow cylindrical filter to make the overall volume smaller, so that not only does not occupy space, but also can absorb a large amount of air to utilize ozone-free. Ultraviolet or activated carbon particle filters from UV lamps effectively purify the air for improved air quality.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, the shapes, structures, features, and spirits described in the scope of the patent application are equally changed and modified. , should be included in the scope of the patent application of this creation.

10‧‧‧Gas Guide

12‧‧‧Ozone-free UV sterilizer

14‧‧‧ hollow cylindrical filter

16‧‧‧Removable hollow sleeve

18‧‧‧ bottom cover

20‧‧‧Top ring

22‧‧‧Ventinel

24‧‧‧Upper casing

26‧‧‧ Lower case

27‧‧‧First screw

28‧‧‧Electric fan controller

30‧‧‧First side shell

31‧‧‧Second screw

32‧‧‧Power plug

34‧‧‧Power switch

36‧‧‧Second side shell

37‧‧‧third screw

38‧‧‧Wind cover

39‧‧‧fourth screw

40‧‧‧Electric fan

41‧‧‧ fifth screw

42‧‧‧Speed knob

43‧‧‧6th screw

44‧‧‧Cap

46‧‧‧Upper groove

48‧‧‧Opening

50‧‧‧ opening

52‧‧‧Opening

54‧‧‧wind gap

56‧‧‧ Lower groove

58‧‧‧Power opening

60‧‧‧ hollow cover

61‧‧‧ seventh screw

62‧‧‧UV protective sheet

64‧‧‧ lamp holder

66‧‧‧Ozone-free UV lamp

68‧‧‧Light tube starter

70‧‧‧High efficiency air particle filter

72‧‧‧Active carbon filter

74‧‧‧Active carbon particle filter

76‧‧‧ Hollow cover

77‧‧‧Filter cover

78‧‧‧First porous hollow cylinder

80‧‧‧Second porous hollow cylinder

82‧‧‧Active carbon particles

83‧‧‧Filter holes

Fig. 1 is a perspective view showing a first embodiment of the desktop air purifying apparatus of the present invention. Fig. 2 is an exploded view of the first embodiment of the desktop air purifying apparatus of the present invention. The third figure is the circuit block diagram of the fan controller, power plug, power switch, electric fan, speed control knob, ozone-free UV lamp and lamp starter. Fig. 4 is a perspective view showing a second embodiment of the desktop air purifying apparatus of the present invention. Figure 5 is an exploded view of a second embodiment of the desktop air purification apparatus of the present invention. Figure 6 is a block diagram of the circuit of the fan controller, power plug, power switch, fan and speed control knob.

Claims (10)

A desktop air purifying device comprising: a gas guiding device; an ozone-free ultraviolet sterilizing device disposed at the bottom of the air guiding device and emitting ultraviolet rays; a hollow cylindrical filter surrounding the ozone-free ultraviolet sterilizing device And abutting against a bottom edge of the air guiding device; a removable hollow sleeve having a sidewall having a plurality of venting holes therethrough, the detachable hollow sleeve being sleeved on the air guiding device and the hollow cylinder a bottom cover disposed at a bottom of the detachable hollow sleeve; and a top ring disposed at the top of the detachable hollow sleeve and the air guide device, the air guide device is configured to pass through the bottom The vents attract air to purify the air with the ultraviolet rays and then to evacuate the air. The table top air purifying device of claim 1, wherein the air guiding device further comprises: an upper casing having an upper groove and an upper opening at the top and the bottom, the upper groove communicating with the upper opening a lower housing having a lower opening therethrough, the lower housing being fixed to the upper housing to communicate the lower opening and the upper opening, the ozone-free ultraviolet sterilizing device being fixed to the bottom of the lower housing, the hollow a cylindrical filter abuts against a bottom edge of the lower casing; a fan controller disposed on a side of the upper casing; a first side casing fixed to the upper casing to shield the fan controller; The second side casing is fixed to the lower casing, and the side wall of the second side casing has an opening therethrough; a power plug and a power switch are disposed on the second side casing, and the power plug passes through The power switch is electrically connected to the fan controller, the opening exposes the power plug and the power switch; an air outlet cover has a plurality of air outlet gaps at the top, and a bottom groove at the bottom, the lower groove communicates with the power switch Outlet gap, the outlet top cover Positioned in the upper casing to communicate the upper groove and the lower groove, the top ring is fixed to the outlet top cover, the removable hollow sleeve sleeves the upper casing, the first side casing The second side housing and the air outlet top cover, the detachable hollow sleeve has a power supply opening through the power supply opening, the power supply opening communicates with the opening; and an electric fan is located at the upper recess and the The lower recess is fixed to the air outlet top cover, and the electric fan is electrically connected to the electric fan controller. When the power switch is turned on, the power plug receives a DC voltage and supplies the same to the electric fan through the power switch. a controller to activate the fan, and then attract the air through the vent holes, and purify the air by using the ultraviolet ray, and sequentially pass through the lower opening, the upper opening, the upper groove, the lower groove and the The air is taken out by the air outlet. The table top air purifying device of claim 2, wherein the air guiding device further comprises: a speed adjusting knob, the fan is disposed, and electrically connected to the fan controller; and a cap is disposed on the adjusting At the top of the speed knob, when the power switch is turned on, the power plug provides the DC voltage to the fan controller through the power switch, and the fan is activated by the speed control knob to attract the air through the vent holes. The desktop air purifying device of claim 2, wherein the ozone-free ultraviolet sterilizing device further comprises: a hollow cover fixed to the bottom of the lower casing, the inner space of the hollow cover communicating with the lower opening An ultraviolet shielding plate having a first surface and a second surface, wherein the ultraviolet shielding plate is fixed on the hollow cover, and a part of the ultraviolet shielding plate is located in the inner space; The first surface of the ultraviolet protection panel is electrically connected to the power switch; an ozone-free ultraviolet lamp tube is disposed on the lamp holders to electrically connect the lamp holders; and a lamp tube starter is provided The second surface of the ultraviolet protection panel is electrically connected to the power switch and the lamp holders. When the power switch is turned on, the lamp starter receives the DC voltage to activate the lamp socket through the lamp holders. The ozone-free UV lamp is used to emit the ultraviolet light. The desktop air purifying device of claim 4, wherein the hollow cylindrical filter further comprises a high-efficiency air particulate (HEPA) filter, which surrounds the hollow cover and the ultraviolet a protective plate, the lamp holders, the ozone-free ultraviolet lamp tube and the lamp starter, and abutting the bottom edge of the lower casing. The table top air purifying device of claim 5, wherein the hollow cylindrical filter further comprises an activated carbon filter that surrounds and abuts the high efficiency air particulate filter. The table top air purifying device of claim 4, wherein the lower casing is fixed to the upper casing by a first screw, and the first side casing is fixed to the upper casing by a second screw, the second The side casing is fixed to the lower casing by a third screw, and the air outlet top cover is fixed to the upper casing by a fourth screw, and the top ring is fixed to the air outlet top cover by a fifth screw, and the electric fan uses the sixth A screw is fixed to the air outlet top cover, and the hollow cover is fixed to the bottom of the lower casing by a seventh screw. The table type air purifying device according to claim 1, wherein the ultraviolet ray has a wavelength of 200 to 275 nm. A table type air purifying device according to claim 2, wherein the ozone-free ultraviolet sterilizing device is replaced by an activated carbon particle filter to filter the air. The tabletop air purifying device of claim 9, wherein the activated carbon particle filter further comprises: a hollow cover fixed to the bottom of the lower casing, the inner space of the hollow cover communicating with the lower opening a filter cover having a plurality of filter holes therethrough, the filter cover being fixed on the hollow cover to communicate the filter holes and the inner space of the hollow cover; a first porous hollow cylinder and a a second porous hollow cylinder fixed to the filter cover, the first porous hollow cylinder and the hole of the second porous hollow cylinder communicate with the plurality of filter holes, the first porous hollow cylinder surrounding the filter hole a second porous hollow cylinder, and the first porous hollow cylinder is spaced apart from the second porous hollow cylinder; and a plurality of activated carbon particles located in the first porous hollow cylinder and the second porous hollow Between the cylinders.