A cylindrical germicidal air purifier

Abstract

A columnar germicidal air purifier, comprising a housing and an ultraviolet lamp tube, a wind wheel and a motor arranged inside the housing. A double-layer quartz tube assembly is provided inside the housing. The ultraviolet lamp tube is inserted into the inner-layer quartz tube. A filter is provided outside the outer-layer quartz tube. An air inlet hole is provided on the housing. A germicidal air inlet passage with an S-shaped cross-section is formed between the filter and the outer-layer quartz tube and between the outer-layer quartz tube and the inner-layer quartz tube. During sterilization, air enters the housing from the air inlet hole, is filtered by the filter and enters the cavity between the outer-layer quartz tube and the filter for sterilization, then turns back from the upper end of the outer-layer quartz tube and enters the cavity between the outer-layer quartz tube and the inner-layer quartz tube, and then turns back from the lower end of the inner-layer quartz tube and enters the cavity between the inner-layer quartz tube and the ultraviolet lamp tube, and finally is discharged from the air outlet hole on the upper side of the housing. The structure of the present invention is more reasonable and compact, the sterilization efficiency is higher, the circulation sterilization can be carried out more effectively, and at the same time, the installation and disassembly are convenient.

Description

Technical Field

[0001] The present invention relates to the technology of air purifiers, and particularly to a columnar sterilizing air purifier. Background Art

[0002] An air purifier, also known as an "air cleaner", air freshener, or purifier, refers to a product that can adsorb, decompose, or transform various air pollutants (generally including PM2.5, dust, pollen, odors, decoration pollutants such as formaldehyde, bacteria, allergens, etc.) and effectively improve the air cleanliness. With the rapid development of modern industrial technology, air pollution has become increasingly serious, and more and more families use air purifiers. Among existing air purifiers, ultraviolet sterilization is a commonly used technical means, and currently, many air purifiers are equipped with ultraviolet lamps. However, many ultraviolet sterilization lamps are only statically placed without air circulation for repeated sterilization, and there are also cases where the sterilization efficiency is low due to unreasonable air duct design. Based on ultraviolet lamps with the same UVC wavelength, the sterilization efficiency is proportional to the irradiation power and irradiation time of ultraviolet rays; the closer to the ultraviolet lamp, the higher the irradiation power.

[0003] After investigation, the Chinese patent "An Ultraviolet Air Purifier" with the application number CN201520143200.2 includes a housing. An air inlet is provided below the housing, and an air outlet is provided above the housing. An ultraviolet LED lamp tube is provided inside the housing. An air suction fan is provided at the air inlet, a filter screen is provided at the air outlet, an irradiation port is provided on the housing, and the irradiation port is covered with transparent plastic. A storage battery is provided inside the housing, and the storage battery is electrically connected to the LED lamp tube. A hinged lighting lamp is provided on one side wall of the housing, and the lighting lamp is electrically connected to the storage battery. The air is purified by the LED ultraviolet lamp. The above air purifier uses ultraviolet rays to sterilize the air entering the air purifier. However, after the air enters the pipeline, the travel distance from the air inlet to the air outlet is short, resulting in insufficient irradiation time of ultraviolet rays on the air in the pipeline, and the sterilization effect is not very ideal.

[0004] There is also the Chinese patent "An Ultraviolet High-Efficiency Sterilizing Air Purifier" with the patent number CN201920744905.8, which includes a housing, a gas guide pipe, and an ultraviolet device provided in the housing. An air inlet and an air outlet are provided on the housing. The gas guide pipe connects the air inlet and the air outlet, and the gas guide pipe is arranged in the housing in a form of multi-layer folding back and forth. The ultraviolet device is used to irradiate and sterilize the gas in the gas guide pipe. This bending of the gas guide pipe can increase the irradiation time of ultraviolet rays on the air in the pipeline and improve the sterilization effect. However, the ultraviolet device is multiple ultraviolet lamp tubes evenly arranged around the gas guide pipe. This structure is not only complex, requires multiple ultraviolet lamp tubes, has a high cost, but also the sterilization effect is not very ideal. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a columnar germicidal air purifier with a more reasonable and compact structure and higher sterilization efficiency in view of the above technical status quo.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: A columnar germicidal air purifier includes a housing, and an ultraviolet lamp tube, a wind wheel and a motor arranged in the housing. It is characterized in that: a double-layer quartz tube assembly is arranged in the housing, and the double-layer quartz tube assembly includes an inner and an outer layer of quartz tubes coaxially arranged with different sizes. The ultraviolet lamp tube is inserted into the inner layer of quartz tube. A cylindrical filter is arranged outside the outer layer of quartz tube. An air inlet hole is opened on the housing. A germicidal air inlet passage with an S-shaped cross section is formed between the filter and the outer layer of quartz tube, and between the outer layer of quartz tube and the inner layer of quartz tube. During sterilization, air enters the housing from the air inlet hole, is filtered by the filter and enters the cavity between the outer layer of quartz tube and the filter for sterilization, then turns back from the upper end of the outer layer of quartz tube and enters the cavity between the outer layer of quartz tube and the inner layer of quartz tube, and then turns back from the lower end of the inner layer of quartz tube and enters the cavity between the inner layer of quartz tube and the ultraviolet lamp tube, and finally is discharged from the air outlet hole on the upper side of the housing.

[0007] As an improvement, the housing is of a cylindrical tubular structure, and there are multiple air inlet holes, which are arranged on the circumferential surface of the lower part of the housing. The double-layer quartz tube assembly further includes a support frame for fixing the quartz tube and the filter. The filter is a HEPA filter, and a layer of photocatalyst filter screen is covered on the inner wall of the filter.

[0008] Further improvement, the support frame includes an upper support seat and a lower support seat. The upper support seat and the lower support seat are circular. The diameter of the upper support seat is larger than that of the lower support seat. The diameter of the lower support seat is larger than the outer diameter of the outer layer of quartz tube. A number of support columns are supported between the upper support seat and the lower support seat. The lengths of the outer layer of quartz tube and the inner layer of quartz tube can be the same or different. The length of the ultraviolet lamp tube is not less than the length of the quartz tube. The length of the support column is greater than the lengths of the quartz tube and the ultraviolet lamp tube.

[0009] Furthermore, a round hole for the ultraviolet lamp tube to pass through is opened in the middle of the upper support seat. A circular positioning groove for the upper end of the inner layer of quartz tube to be inserted and positioned is formed around the round hole on the lower end surface of the upper support seat. A positioning foot corresponding to the lower end of the inner layer of quartz tube to abut and position is provided on the upper end surface of the lower support seat. An annular groove for the lower end of the outer layer of quartz tube to be inserted and positioned is formed at intervals in the circumferential direction on the upper end surface of the lower support seat. A clamping foot for abutting and positioning the upper end of the outer layer of quartz tube is provided corresponding to the lower end surface of the upper support seat. A gap for air flow is provided between the upper end of the outer layer of quartz tube and the upper support seat. A gap for air flow is provided between the lower end of the inner layer of quartz tube and the lower support seat.

[0010] Furthermore, positioning jacks for inserting and positioning the support columns are respectively arranged at circumferentially spaced intervals on the lower end face of the upper support seat and the upper end face of the lower support seat, and the support columns are circumferentially spaced and supported between the upper support seat and the lower support seat and cooperate with the outer wall of the outer quartz tube for support.

[0011] Furthermore, the number of the support columns is 3 to 5 at circumferentially uniform intervals, and the positioning feet on the upper end face of the lower support seat and the clamping feet on the lower end face of the upper support seat are 3 to 5 at circumferentially uniform intervals.

[0012] Furthermore, the upper support seat is formed with a downwardly folded circular edge, the upper end of the cylindrical filter is arranged within the circular edge and abuts against the lower end face of the upper support seat, the lower end of the filter abuts against the bottom of the housing, and an installation seat for abutting against the inner wall of the housing for installing the ultraviolet lamp tube is arranged at the upper end of the upper support seat.

[0013] Furthermore, the installation seat is a circular plate, a hollow convex platform protruding upward is formed in the middle of the circular plate, the upper end of the ultraviolet lamp tube is installed on the lamp socket, a plurality of protruding positioning columns are arranged at the upper end of the lamp socket, and positioning holes for inserting the positioning columns are arranged on the lower end face of the hollow convex platform.

[0014] Furthermore, a circular groove for inserting the rotating shaft of the air wheel is formed on the upper end face of the hollow convex platform, the motor is arranged above the air wheel and is fixed in the space below the top of the upper cover through a motor fixing bracket.

[0015] Finally, the housing is formed by snap-fitting a left half housing and a right half housing, and an upper cover is snap-fitted and covered at the upper end of the housing, and air outlet holes are arranged on the upper cover.

[0016] Compared with the prior art, the advantages of the present invention are as follows: a double-layer quartz tube assembly is arranged inside the housing, the double-layer quartz tubes are coaxially arranged inside and outside, and ultraviolet rays can penetrate, so as to form an S-shaped cross-section sterilization channel, effectively extending the air flow distance and the sterilization time; a HEPA filter is arranged outside the double-layer quartz tube assembly, so that before the air enters the quartz tube, it first passes through the surrounding HEPA filter for filtration, and a photocatalyst filter screen is covered on the inner layer of the HEPA filter, effectively assisting in sterilization; the air all flows along the length direction of the ultraviolet lamp tube and is relatively close to the ultraviolet lamp, so the effective sterilization time is long and the irradiation power is high. The structure of the present invention is reasonable and compact, the sterilization efficiency is high, the sterilization can be circulated more effectively, and at the same time, the installation and disassembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the external structure diagram of the embodiment of the present invention;

[0018] Figure 2 is Figure 1 the top view of;

[0019] Figure 3 isFigure 1 Longitudinal sectional view;

[0020] Figure 4 Structural schematic diagram of the double-layer quartz tube assembly of the present invention;

[0021] Figure 5 is Figure 4 Longitudinal sectional view;

[0022] Figure 6 is Figure 4 Transverse sectional view;

[0023] Figure 7 is Figure 4 Exploded view;

[0024] Figure 8 Exploded view of an embodiment of the present invention. Detailed implementation manners

[0025] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0026] As Figures 1 to 8 shown, a columnar germicidal air purifier includes a housing 1, and a UV lamp tube 9, a double-layer quartz tube assembly 3, a filter 4, a wind wheel 6 and a motor 5 arranged in the housing 1. The housing 1 is formed into a cylindrical tubular structure by snap-fitting a left half housing 11 and a right half housing 12. An upper cover 2 is snap-fitted and covered on the upper end of the housing 1. A plurality of air outlet holes 21 are arranged on the upper cover 2, and a plurality of air inlet holes 13 are arranged on the circumferential surface of the lower part of the housing 1. The double-layer quartz tube assembly 3 includes inner and outer two-layer quartz tubes 31 and 32 with different diameters arranged coaxially. Of course, it is not limited to cylindrical quartz tubes, and can also be various polygonal or elliptical quartz tubes, just with different sizes. The UV lamp tube 9 is inserted into the inner layer quartz tube 31. The filter 4 is a cylindrical HEPA filter. Of course, it is not limited to cylindrical filters, and can also be various polygonal or elliptical filters. The filter 4 is arranged outside the outer layer quartz tube 32, and a layer of photocatalyst filter screen is covered on the inner wall of the filter 4. A germicidal air inlet channel with an S-shaped cross section is formed between the filter 4 and the outer layer quartz tube 32, and between the outer layer quartz tube 32 and the inner layer quartz tube 31. During sterilization, air enters the housing 1 from the air inlet hole 14, is filtered by the filter 4 and enters the cavity between the outer layer quartz tube 32 and the filter 4 for sterilization, then turns back from the upper end of the outer layer quartz tube 32 and enters the cavity between the outer layer quartz tube 32 and the inner layer quartz tube 31, and then turns back from the lower end of the inner layer quartz tube 31 and enters the cavity between the inner layer quartz tube 31 and the UV lamp tube 9, and finally is discharged from the air outlet holes 21 on the upper side of the housing 1.

[0027] The specific structure is as follows: The double-layer quartz tube assembly 3 further includes a support frame for fixing the inner and outer quartz tubes 31 and 32 and the filter 4. The support frame includes an upper support seat 33 and a lower support seat 34. The upper support seat 33 and the lower support seat 34 are circular. The diameter of the upper support seat 33 is greater than that of the lower support seat 34. The diameter of the lower support seat 34 is greater than the outer diameter of the outer quartz tube 32. Four support columns 35 are supported between the upper support seat 33 and the lower support seat 34. The support columns 35 are made of metal tubes. The length of the support columns 35 is greater than the lengths of the inner and outer quartz tubes 31 and 32 and the ultraviolet lamp tube 9. The lengths of the outer quartz tube 32 and the inner quartz tube 31 are the same, or of course, they can also be different, depending on the needs. The length of the ultraviolet lamp tube 9 is not less than the lengths of the outer quartz tube 32 and the inner quartz tube 31.

[0028] A circular hole 330 for inserting the ultraviolet lamp tube 9 is formed in the middle of the upper support base 33. A circular positioning groove 331 for inserting and positioning the upper end of the inner quartz tube 31 is formed around the circular hole 330 on the lower end surface of the upper support base 33. A positioning foot 341 that abuts against and positions the lower end of the inner quartz tube 31 protrudes from the upper end surface of the lower support base 34. There are four positioning feet 341 that are evenly spaced circumferentially. The upper end of the inner quartz tube 31 is inserted into the positioning groove 331, and the lower end of the inner quartz tube 31 abuts against the positioning feet 341 for positioning. A gap for air flow is provided between the lower end of the inner quartz tube 31 and the lower support base 34. An annular groove 342 for inserting and positioning the lower end of the outer quartz tube 32 is formed at intervals circumferentially on the upper end surface of the lower support base 34. Corresponding clamping feet 332 for abutting against and positioning the upper end of the outer quartz tube 32 are provided on the lower end surface of the upper support base 33. There are four clamping feet 332 that are evenly spaced circumferentially. The lower end of the outer quartz tube 32 is inserted into the annular groove 342, and the upper end of the outer quartz tube 32 abuts against the clamping feet 332 for positioning. A gap for air flow is provided between the upper end of the outer quartz tube 32 and the upper support base 33. Positioning sockets 333 and 343 for inserting and positioning the support columns 35 are provided at intervals circumferentially on the lower end surface of the upper support base 33 and the upper end surface of the lower support base 34 respectively. The support columns 35 are supported at intervals circumferentially between the upper support base 33 and the lower support base 34 and cooperate with the outer wall of the outer quartz tube 32 for support. The upper support base 33 is formed with a downwardly folded circular edge 334. The outer diameter of the filter 4 matches the inner diameter of the circular edge 334. The upper end of the filter 4 is arranged within the circular edge 334 and abuts against the lower end surface of the upper support base 33. The lower end of the filter 4 abuts against the bottom of the housing 1. An installation seat 7 for abutting against the inner wall of the housing 1 for installing the ultraviolet lamp tube 9 is provided at the upper end of the upper support base 33. The installation seat 7 is a circular plate. The diameter of the circular plate matches the inner diameter of the housing 1. An upwardly protruding hollow boss 71 is formed in the middle of the circular plate. The upper end of the ultraviolet lamp tube 9 is installed on the lamp holder 8. Two protruding positioning columns are provided at the upper end of the lamp holder 8. A positioning hole for inserting the positioning column is provided on the lower end surface of the hollow boss 71. A circular groove for inserting the rotating shaft of the air wheel 6 is formed on the upper end surface of the hollow boss 71. The motor 5 is arranged above the air wheel 6 and is fixed in the space below the top of the upper cover 2 through a motor fixing frame.

[0029] During use, the dusty air enters the housing 1 from the air inlet hole 13, is first filtered by the filter 4, then enters the cavity between the outer quartz tube 32 and the filter 4 for sterilization, then turns back from the upper end of the outer quartz tube 32 and enters the cavity between the outer quartz tube 32 and the inner quartz tube 31 for continuous sterilization, and then turns back from the lower end of the inner quartz tube 31 and enters the cavity between the inner quartz tube 31 and the ultraviolet lamp tube 9 for further sterilization. The air flow direction is as shown in Figure 3As shown by the arrow, the fresh air after purification and sterilization finally discharges from the air outlet hole 21 above the outer shell 1, and impurities such as dust and particles are adsorbed on the filter 4. During sterilization, the air flows along the length direction of the ultraviolet lamp tube 9 and is relatively close to the ultraviolet lamp tube 9, with a long effective sterilization time and a high irradiation power.

[0030] When it is necessary to clean the filter 4 or replace the ultraviolet lamp tube 9, open the upper cover 2, and then the filter 4 and the double-layer quartz tube assembly 3 can be removed, and the filter 4 can be taken out for convenient cleaning. At the same time, the ultraviolet lamp tube 9 can also be taken out for replacement. The whole structure is compact and occupies little space.

[0031] In addition, the shape of the outer shell 1 is not limited to a cylindrical shape, and it can also be other similar columnar structures. The quartz tubes 31 and 32 and the filter 4 are not limited to a cylindrical shape either, and they can also be other similar columnar structures.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A cylindrical germicidal air purifier, comprising a housing and a UV lamp tube, a wind wheel and a motor arranged inside the housing, characterized in that: A double-layer quartz tube assembly is provided inside the housing. The double-layer quartz tube assembly includes an inner and an outer quartz tube which are coaxially arranged with different sizes. The ultraviolet lamp tube is inserted into the inner quartz tube. A cylindrical filter is provided outside the outer quartz tube. An air inlet hole is formed on the housing. A sterilization air inlet channel with an S-shaped cross-section is formed between the filter and the outer quartz tube, and between the outer quartz tube and the inner quartz tube. During sterilization, air enters the housing from the air inlet hole, is filtered by the filter and enters the cavity between the outer quartz tube and the filter for sterilization, then turns back from the upper end of the outer quartz tube and enters the cavity between the outer quartz tube and the inner quartz tube, then turns back from the lower end of the inner quartz tube and enters the cavity between the inner quartz tube and the ultraviolet lamp tube, and finally is discharged from the air outlet hole on the upper side of the housing. The housing is a cylindrical tubular structure. There are multiple air inlet holes which are arranged on the circumferential surface of the lower part of the housing. The double-layer quartz tube assembly further includes a support frame for fixing the quartz tube and the filter. The filter is a HEPA filter, and a layer of photocatalyst filter screen is covered on the inner wall of the filter. The support frame includes an upper support seat and a lower support seat. The upper support seat and the lower support seat are circular. The diameter of the upper support seat is larger than that of the lower support seat. The diameter of the lower support seat is larger than the outer diameter of the outer quartz tube. Several support columns are supported between the upper support seat and the lower support seat. The length of the ultraviolet lamp tube is not less than that of the quartz tube. The length of the support column is greater than the lengths of the quartz tube and the ultraviolet lamp tube. A round hole for the ultraviolet lamp tube to pass through is formed in the middle of the upper support seat. A circular positioning groove for the upper end of the inner quartz tube to be inserted and positioned is formed around the round hole on the lower end surface of the upper support seat. A positioning foot corresponding to the lower end of the inner quartz tube to abut and position is provided on the upper end surface of the lower support seat. An annular groove for the lower end of the outer quartz tube to be inserted and positioned is formed at intervals in the circumferential direction on the upper end surface of the lower support seat. A clamping foot for abutting and positioning the upper end of the outer quartz tube is provided corresponding to the lower end surface of the upper support seat. A gap for air flow is provided between the upper end of the outer quartz tube and the upper support seat. A gap for air flow is provided between the lower end of the inner quartz tube and the lower support seat. Positioning jacks for the support columns to be inserted and positioned are respectively provided at intervals in the circumferential direction on the lower end surface of the upper support seat and the upper end surface of the lower support seat. The support columns are supported at intervals in the circumferential direction between the upper support seat and the lower support seat and cooperate with the outer wall of the outer quartz tube for support. The upper support seat is formed with a circular edge that turns downwards. The upper end of the cylindrical filter is arranged inside the circular edge and abuts against the lower end surface of the upper support seat. The lower end of the filter abuts against the bottom of the housing. An installation seat for abutting against the inner wall of the housing for installing the ultraviolet lamp tube is provided on the upper end of the upper support seat. The housing is formed by snap-fitting a left half housing and a right half housing. An upper cover is snap-fitted and covered on the upper end of the housing. Air outlet holes are arranged on the upper cover.

2. The cylindrical germicidal air purifier according to claim 1, wherein: The number of the support columns is 3 to 5 which are evenly spaced in the circumferential direction. The number of the positioning feet on the upper end surface of the lower support seat and the clamping feet on the lower end surface of the upper support seat is 3 to 5 which are evenly spaced in the circumferential direction.

3. The cylindrical germicidal air purifier according to claim 1, wherein: The mounting base is a circular plate, and a hollow convex platform protruding upward is formed in the middle of the circular plate. The upper end of the ultraviolet lamp tube is installed on the lamp holder, and a plurality of protruding positioning columns are provided at the upper end of the lamp holder. A positioning hole for inserting the positioning column is provided on the lower end surface of the hollow convex platform.

4. The columnar germicidal air purifier according to claim 3, characterized in that: A circular groove for inserting the rotating shaft of the air wheel is formed on the upper end surface of the hollow convex platform. The motor is arranged above the air wheel and is fixed in the lower space on the top of the upper cover through a motor fixing bracket.

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