Air purifier
By incorporating a light diffusion structure and reflective surface into the air purifier, the cost issue of ultraviolet disinfection for large-size filters is resolved, achieving a wide-area disinfection effect and cleaning of the inner wall of the cavity, thus reducing the manufacturer's costs.
Patent Information
- Application Number
- CN202520155542.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In existing air purifiers, as the size of the filter increases, the irradiation area of the ultraviolet disinfection lamp is limited, resulting in the need for multiple lamp beads for disinfection, which increases the manufacturer's cost.
A light diffusion structure is set in the ultraviolet disinfection component, including symmetrically arranged diffusion reflective surfaces with an inclination angle α of 45°~75° and a distance of 6mm~20mm from the UV light source. The reflective surfaces diffuse ultraviolet light to a more distant area of the filter. Combined with the arc-shaped reflective surface and the secondary reflective surface, uniform disinfection of large-size filters is achieved.
By using a diffused reflective surface and a secondary reflective surface, a single UV disinfection component can cover a large-sized filter, reducing disinfection costs while avoiding contamination of the inner wall of the UV disinfection chamber and keeping the purifier clean.
Smart Images
Figure CN223896203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of air purification, and in particular to an air purifier. Background Technology
[0002] During the long-term process of air purifiers drawing in air, dust, bacteria, and harmful substances such as formaldehyde accumulate on the filter screen of the purification chamber. Combined with the moisture in the air, this creates an environment conducive to the growth of bacteria and viruses. Over time, a large number of bacteria and viruses will grow on the filter screen.
[0003] Currently, ultraviolet (UV) disinfection is mainly used to disinfect pathogens such as viruses, bacteria, and microorganisms on filters. This involves using UV light emitted by UV lamps to disinfect the pathogens. As users demand higher purification efficiency from air purifiers, the size of filters is also increasing. However, the area that a single UV disinfection lamp can irradiate is limited. To meet the disinfection needs of larger filters, two or more UV disinfection lamps are required, which introduces additional costs for manufacturers. Utility Model Content
[0004] In view of the problems existing in the prior art, the main purpose of this utility model is to provide an air purifier that aims to reduce the cost of ultraviolet disinfection of the filter.
[0005] To achieve the above objectives, a filter screen and an ultraviolet disinfection component disposed on one side of the filter screen are included. The ultraviolet disinfection component includes a UV light source and a light diffusion structure disposed above the light-emitting surface of the UV light source. The light diffusion structure has two symmetrically arranged diffusion and reflection surfaces on the side facing the UV light source. The diffusion and reflection surfaces have an inclination angle α relative to the central optical axis of the UV light source, and the distance from the lower end of the diffusion and reflection surfaces to the central optical axis gradually increases in the upward direction. The diffusion and reflection surfaces can reflect ultraviolet light projected by the UV light source onto the diffusion and reflection surfaces at an incident angle β greater than the inclination angle α to the filter screen.
[0006] In some alternative embodiments, the tilt angle α is between 45° and 75°.
[0007] In some alternative embodiments, the distance H1 between the UV light source and the light diffusion structure is between 6 mm and 20 mm.
[0008] In some alternative embodiments, the joint surface of the two diffusion reflective surfaces is an arc-shaped curved surface, the joint surface convexes outward from top to bottom, and a secondary reflective surface opposite to the joint surface is provided on one side of the UV light source.
[0009] In some alternative embodiments, the UV light source is a line light source, and both the UV light source and the light diffusion structure are arranged along the width direction of the filter.
[0010] In some alternative embodiments, barriers are provided at both ends of the UV light source along its length.
[0011] In some alternative embodiments, the light diffusion structure is attached to the enclosure.
[0012] In some optional embodiments, the ultraviolet disinfection assembly further includes a mounting base, on which a receiving groove and a light-transmitting hole communicating with the receiving groove are provided; the UV light source is disposed in the receiving groove, the light-emitting part of the UV light source is exposed outward from the light-transmitting hole, and the light diffusion structure is connected above the light-transmitting hole through the enclosure.
[0013] In some alternative embodiments, the UV light source is engaged in the receiving groove by a locking structure. The UV light source includes a circuit board, a UVLED chip disposed on the upper surface of the circuit board, and an electrical connector disposed on the lower surface of the circuit board.
[0014] In some alternative embodiments, the locking structure includes a plurality of elastic protrusions disposed on the wall of the receiving groove.
[0015] The air purifier provided by this utility model improves the ultraviolet disinfection component. Specifically, a light diffusion structure is set above the emitting surface of the UV light source. Two symmetrically arranged diffusion and reflection surfaces are provided on the side of the light diffusion structure facing the UV light source. The diffusion and reflection surfaces are inclined relative to the central optical axis of the UV light source, and the distance from the central optical axis increases from the lower end of the diffusion and reflection surfaces upwards. Therefore, when some of the ultraviolet light emitted by the UV light source is projected onto the diffusion and reflection surfaces, the diffusion and reflection surfaces can reflect the ultraviolet light to a filter position farther away from the UV light source. This makes it possible to achieve ultraviolet disinfection of large-size filters with a single ultraviolet disinfection component, thereby ensuring the disinfection effect of large-size filters while controlling disinfection costs. Attached Figure Description
[0016] Figure 1 A perspective view of an air purifier provided for an embodiment of this utility model;
[0017] Figure 2 A schematic diagram of the light irradiating the filter of the ultraviolet disinfection component;
[0018] Figure 3 This is a schematic diagram of the reflection of the ultraviolet disinfection component;
[0019] Figure 4 A three-dimensional schematic diagram of the ultraviolet disinfection component;
[0020] Figure 5 A schematic diagram of a cross-section of the ultraviolet disinfection component;
[0021] Figure 6 This is a schematic diagram of the bottom of the ultraviolet disinfection component. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Reference Figure 1-2 This utility model embodiment proposes an air purifier 10, which includes a housing 11. From left to right, the housing 11 has a fan mounting cavity 11a, an ultraviolet disinfection cavity 11b, and a filter mounting cavity 11c. A partition plate separates the ultraviolet disinfection cavity 11b from the fan mounting cavity 11a, and the ultraviolet disinfection cavity 11b and the filter mounting cavity 11c are directly connected. The fan mounting cavity 11a has two vertically arranged fan mounting positions, and a ventilation opening is provided on the partition plate corresponding to each fan mounting position. An ultraviolet disinfection component 13 is disposed in the ultraviolet disinfection cavity 11b, and a filter 12 is disposed in the filter mounting cavity 11c. The ultraviolet disinfection component 13 can emit ultraviolet light to the filter 12, thereby disinfecting the filter 12 with ultraviolet light.
[0024] Reference Figure 3-5 The ultraviolet disinfection component 13 includes a UV light source 131 and a light diffusion structure 132 disposed above the light-emitting surface of the UV light source 131. The side of the light diffusion structure 132 facing the UV light source 131 is provided with a first diffusion reflective surface 132a and a second diffusion reflective surface 132b symmetrically arranged. Both the first diffusion reflective surface 132a and the second diffusion reflective surface 132b have an inclination angle α relative to the central optical axis L1 of the UV light source 131 and the distance from the central optical axis L1 gradually increases from the lower end of the light diffusion structure 132 in an upward direction.
[0025] Reference Figure 3 When the ultraviolet light emitted by the UV light source 131 irradiates the first diffusion reflective surface 132a and the second diffusion reflective surface 132b, some of the ultraviolet light projected onto the first diffusion reflective surface 132a with an incident angle β greater than the tilt angle α is reflected onto the upper filter surface of the filter screen 12, and some of the ultraviolet light projected onto the second diffusion reflective surface 132b with an incident angle β greater than the tilt angle α is reflected onto the lower filter surface of the filter screen 12.
[0026] Meanwhile, the ultraviolet light that is not reflected onto the surface of the filter 12 is reflected onto the inner wall of the ultraviolet disinfection chamber 11b.
[0027] Compared with the prior art, this utility model improves the ultraviolet disinfection component 13, so that the ultraviolet disinfection component 13 can irradiate a larger range, thereby enabling one ultraviolet disinfection component 13 to complete the ultraviolet disinfection of large-size filters, reducing the cost of ultraviolet disinfection of filters in air purifiers.
[0028] Furthermore, the diffused ultraviolet light can simultaneously disinfect the inner wall of the ultraviolet disinfection chamber 11b, preventing pathogens such as viruses, bacteria, and microorganisms from accumulating and contaminating the ultraviolet disinfection chamber 11b on the inner wall, keeping the ultraviolet disinfection chamber 11b clean, and avoiding secondary pollution.
[0029] In this embodiment, the tilt angle α of the diffuse reflective surface is between 45° and 75°, for example, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, and 75°.
[0030] It should be noted that the tilt angle α is not limited to the integer value mentioned above; any value between two adjacent integer values can also be used as the tilt angle α.
[0031] Specifically, the effect of ultraviolet light projection onto the light diffusion structure 132 is influenced by the tilt angle α of the first diffusion reflective surface 132a and the second diffusion reflective surface 132b. The larger the tilt angle α, the farther the ultraviolet light can be reflected to a position further from the central optical axis L1 of the UV light source 131. However, the tilt angle α also needs to be within a reasonable range to ensure that most of the light is reflected onto the filter 12 rather than onto the inner wall of the ultraviolet sterilization chamber 11b. Only ultraviolet light with an incident angle β greater than the tilt angle α projected onto the diffusion reflective surface can be reflected onto the filter 12. For ultraviolet light with an incident angle β less than or equal to the tilt angle α, it can only be reflected onto the inner wall of the ultraviolet sterilization chamber 11b. When the tilt angle α is closer to 90°, the diffusion and reflection surface tends to be parallel to the filter 12. According to the law of reflection of light, this will cause the reflected ultraviolet light to be reflected back to the UV light source side, which is not conducive to the diffusion of ultraviolet light to the filter 12 side. When the tilt angle α is closer to 0°, the diffusion and reflection surface tends to be perpendicular to the filter 12, and the reflection effect on ultraviolet light is weaker, that is, the diffusion range is smaller.
[0032] By tilting the diffuse reflective surface at an angle α of 45° to 75°, ultraviolet light can be effectively diffused, increasing the range of UV light source 131 irradiating the filter 12.
[0033] Preferably, the tilt angle α is set between 45° and 60°.
[0034] In this embodiment, the distance H1 between the UV light source 131 and the light diffusion structure 132 is set between 6mm and 20mm. For example, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, and 20mm.
[0035] It should be noted that the distance H1 is not limited to the integer values mentioned above; any value between two adjacent integer values can also be used as the distance H1.
[0036] Specifically, the effect of ultraviolet light projected onto the light diffusion structure 132 is also affected by the distance between the UV light source 131 and the light diffusion structure 132, which affects the amount of light irradiated by the UV light source 131 onto the light diffusion structure 132. Specifically, the closer the light diffusion structure 132 is to the UV light source 131, the more ultraviolet light is projected onto the light diffusion structure 132; as the distance between the light diffusion structure 132 and the UV light source 131 gradually increases, the amount of ultraviolet light projected onto the light diffusion structure 132 will gradually decrease, resulting in a reduction in the amount of diffused ultraviolet light.
[0037] By limiting the distance H1 between the UV light source 131 and the light diffusion structure 132 to between 6mm and 20mm, it is possible to ensure that sufficient ultraviolet light is projected onto the light diffusion structure 132 and that sufficient ultraviolet light is diffused onto the filter 12.
[0038] Preferably, the distance H1 is set between 6mm and 12mm.
[0039] Preferably, in this embodiment, the joint surface between the first diffusion reflective surface 132a and the second diffusion reflective surface 132b is rounded to form an outwardly convex arc-shaped reflective surface 132c from top to bottom; at the same time, a secondary reflective surface 134d is provided below the arc-shaped reflective surface 132c.
[0040] Specifically, the bonding surface faces the UV light source 131, and most of the light projected onto the bonding surface is reflected back to the vicinity of the UV light source. By setting the bonding surface as an arc-shaped reflective surface 132c, and setting a secondary reflective surface 134d opposite to the arc-shaped reflective surface 132c on one side of the UV light source, when the UV light source shines upward on the arc-shaped reflective surface 132c at a certain angle (generally 120°, depending on the emission angle of the light source), part of the ultraviolet light is reflected again on the arc-shaped reflective surface 132c to the secondary reflective surface 134d. The secondary reflective surface 134d then reflects the ultraviolet light to the first diffusion reflective surface 132a, the second diffusion, and the arc-shaped reflective surface 132c. After multiple reflections, diffuse reflection is formed, so that the ultraviolet light can be more evenly irradiated on the filter 12.
[0041] Preferably, in this embodiment, the UV light source 131 is a line light source, and both the UV light source 131 and the light diffusion structure 132 are arranged along the width direction of the filter screen 12.
[0042] Specifically, the filter 12 used in this embodiment is rectangular. By using a line light source as the UV light source 131, the ultraviolet light reflected by the light diffusion structure 132 can uniformly irradiate the filter 12, and the irradiation effect on the two sides and the center area of the filter 12 parallel to the length direction tends to be consistent, thus ensuring the disinfection effect.
[0043] Preferably, in this embodiment, enclosures 133 are respectively provided at two ends along the length of the UV light source 131.
[0044] Specifically, the ultraviolet light emitted by the UV light source 131 is projected in all directions. The two sides along the length of the UV light source 131 correspond to the inner walls of the ultraviolet disinfection chamber 11b. Ultraviolet light is a high-energy beam with a strong oxidizing effect. If it directly irradiates the inner walls of the ultraviolet disinfection chamber 11b, it will easily accelerate the aging and corrosion of the inner walls of the ultraviolet disinfection chamber 11b. The enclosure 133 can limit the ultraviolet light from escaping from both ends along its length, preventing the inner walls of the ultraviolet disinfection chamber 11b from being directly exposed to ultraviolet light and thus accelerating aging and corrosion.
[0045] At the same time, the enclosure 133 and the light diffusion structure 132 can be treated with UV protection or made of UV-resistant materials to ensure the service life of the enclosure 133 and the light diffusion structure 132.
[0046] Preferably, in this embodiment, the light diffusion structure 132 is connected to the enclosure 133.
[0047] Specifically, the light diffusion structure 132 and the enclosure 133 are integrally molded by injection molding to simplify the structure of the ultraviolet disinfection component 13 and improve the ease of use of the ultraviolet disinfection component 13.
[0048] See Figure 4-5 In this embodiment, the ultraviolet disinfection component 13 further includes a mounting base 134. The bottom of the mounting base 134 is recessed with a downward-facing receiving groove 134a. The surface of the mounting base 134 is provided with a secondary reflective surface 134d, on which four light-transmitting holes 134b communicating with the receiving groove 134a are provided. An integrally formed light diffusion structure 132 and a barrier 133 are connected above the light-transmitting holes 134b. The UV light source 131 is disposed in the receiving groove 134a, and the light-emitting part of the UV light source 131 is exposed outward from the light-transmitting holes 134b.
[0049] Preferably, the mounting base 134 is integrally molded with the light diffusion structure 132 and the enclosure 133 by injection molding to further simplify the structure of the ultraviolet disinfection component 13.
[0050] See Figure 4-6 In an embodiment, the UV light source 131 includes a circuit board 1311, four UV LED chips 1312 disposed on the upper surface of the circuit board 1311, and an electrical connector 1313 disposed on the lower surface of the circuit board 1311. The four UV LED chips 1312 are arranged along the length direction of the light diffusion structure 132 to form a line light source.
[0051] Electrical connector 1313 is disposed on the lower surface of circuit board 1311, with the slot opening of self-contained groove 134a exposed. In this way, when the ultraviolet disinfection component 13 is installed on the inner wall of ultraviolet disinfection chamber 11b, the ultraviolet disinfection component 13 can be conveniently connected to the internal control circuit of the purifier without affecting the installation.
[0052] In this embodiment, the UV light source 131 is engaged in the receiving groove 134a by a locking structure, without the need for additional fasteners to achieve fixation.
[0053] In this embodiment, the locking structure includes multiple elastic protrusions 134c disposed on the groove wall of the receiving groove 134a. Each elastic protrusion 134c is a spring piece formed by cutting a U-shaped groove in the groove wall. The end of the spring piece has a protrusion extending into the receiving groove 134a. The height of the protrusion gradually decreases in the direction extending from the wall of the receiving groove 134a into the groove, thereby forming an elastic protrusion 134c with an inverted buckle. During installation, the circuit board 1311 is pressed against the bottom of the groove. The elastic protrusion 134c deforms outward from the groove under the influence of the pressing force until the circuit board 1311 is pressed to the bottom of the receiving groove 134a. The elastic protrusion 134c rebounds, and the protrusion on the elastic protrusion 134c holds the circuit board 1311 in place and fixes it in the groove.
[0054] Preferably, elastic protrusions 134c are provided on two opposite side walls of the groove, and one side of the elastic protrusion 134c is replaced by a square hole 134d formed in the groove wall. The circuit board 1311 is provided with a plug-in portion that matches the square hole 134d. During installation, the plug-in portion of the circuit board 1311 can be inserted into the square hole, so that the other side of the circuit board 1311 can be pressed more easily into the bottom of the receiving groove 134a.
[0055] The above description is only a preferred embodiment of the present utility model and is not intended to be used in accordance with the present utility model. Any minor modifications, equivalent substitutions and improvements made to the above embodiments based on the technical essence of the present utility model should be included within the protection scope of the technical solution of the present utility model.
Claims
1. An air purifier, comprising a filter and an ultraviolet disinfection component disposed on one side of the filter surface of the filter, characterized in that, The ultraviolet disinfection component includes a UV light source and a light diffusion structure disposed above the light-emitting surface of the UV light source. The side of the light diffusion structure facing the UV light source has two symmetrically arranged diffusion and reflection surfaces. The diffusion and reflection surfaces have an inclination angle α relative to the central optical axis of the UV light source, and the distance from the lower end of the diffusion and reflection surfaces to the central optical axis gradually increases in the upward direction. The diffusion and reflection surfaces can reflect ultraviolet light projected by the UV light source onto the diffusion and reflection surfaces with an incident angle β greater than the inclination angle α to the filter.
2. The air purifier as described in claim 1, characterized in that, The tilt angle α is between 45° and 75°.
3. The air purifier as described in claim 2, characterized in that, The distance H1 between the UV light source and the light diffusion structure is between 6 mm and 20 mm.
4. The air purifier as described in claim 1, characterized in that, The joint surface of the two diffusion reflective surfaces is an arc-shaped curved surface, which convexes outward from top to bottom. A secondary reflective surface opposite to the joint surface is provided on one side of the UV light source.
5. The air purifier as described in claim 1, characterized in that, The UV light source is a linear light source, and both the UV light source and the light diffusion structure are arranged along the width direction of the filter screen.
6. The air purifier as described in claim 5, characterized in that, Enclosures are installed at both ends of the UV light source along its length.
7. The air purifier as described in claim 6, characterized in that, The light diffusion structure is connected to the enclosure.
8. The air purifier as described in claim 7, characterized in that, The ultraviolet disinfection component also includes a mounting base, on which a receiving groove and a light-transmitting hole communicating with the receiving groove are provided; the UV light source is disposed in the receiving groove, and the light-emitting part of the UV light source is exposed outward from the light-transmitting hole; the light diffusion structure is connected above the light-transmitting hole through the enclosure.
9. The air purifier as described in claim 8, characterized in that, The UV light source is engaged in the receiving groove by a locking structure. The UV light source includes a circuit board, a UVLED chip disposed on the upper surface of the circuit board, and an electrical connector disposed on the lower surface of the circuit board.
10. The air purifier as described in claim 9, characterized in that, The locking structure includes multiple elastic protrusions disposed on the wall of the receiving groove.