Patent Publication Number: US-2023145497-A1

Title: Straight-tube uv light

Description:
TECHNICAL FIELD 
     The present invention relates to the technical field of lights, particularly to a UV light. 
     BACKGROUND 
     Strong-UV lights refer to medium-power or large-power UV lights whose power is above 20 W. Their strong UV rays can achieve good sterilization and disinfection effects, can also bring bigger damage to human bodies. 
     In existing technologies, to prevent strong UV rays of lights from irradiating human bodies, UV rays are usually designed into a large-dimension cabinet structure by adding sealing or shielding parts around the UV light source, fan, control power supply, optical subassembly or other functional components and parts. Such parts are usually set in different cavities, leading to repeated multi-layer protection. The design scheme of repeated protection will lead to a complex structure and a bigger volume of the light. Also, the main structure of existing UV lights is not suitable for deriving different types of UV lights, and it is hard to realize unification of key parts of different types of UV lights. 
     The foregoing content is only used for assisting in understanding the technical scheme of the present invention, but does not mean the acknowledgement that the above content is the prior art. 
     SUMMARY 
     To solve the above problem, the present invention provides a straight-tube UV light that can not only simplify the protective structure of the light, reduce the volume of the light and improve the sealing property of the light, but can also derive other types of UV lights to realize standardization and unification of key components and parts of different types of UV lights. 
     The straight-tube UV light provided by the present invention comprises: 
     a light body of a hollow tubular structure provided in a straight line, defined as that the length of the light body extends from the left to the right, height extends from the up to the bottom and width extends from the front to the back; 
     end covers, including the first end cover and the second end cover provided on the left end and the right end of the light body, the first end cover, the second end cover and the light body enclosing to form a mounting cavity, the first end cover and the second end cover respectively provided with the first air hole and the second air hole connecting to the mounting cavity; 
     a functional subassembly comprising at least the first light source subassembly and the control power supply, the functional subassembly is wholly provided in the mounting cavity, the control power connecting to the first light source subassembly, the control power supply used for controlling UV rays irradiated by the first light source subassembly for sterilization and disinfection. 
     Other characteristics and corresponding beneficial effects of the present invention are elaborated in the latter part of the description. 
     The solving ideas of technical problems of the present invention and relevant product design solutions are as shown below: 
     The light body of the UV light is designed into a straight tubular structure. The light body is of a hollow tubular structure in a straight line shape. Each of two ends of the light body is provided with an end cover, the light body and two ends cover enclose each to form a mounting cavity that serves as the main structure of the light. Functional components and parts (i.e. functional subassemblies) like the UV light source, fan, control power supply or optical modules are provided in the mounting cavity. All the functional components and parts are protected, stored and mounted in a unified way via the main structure to significantly reduce the volume of the light, simplify the protective structure of the light and improve the sealing property of the product. Functional components and parts are mounted in the mounting cavity, by which components and parts are less likely to be exposed, and then the appearance of the light is more concise and beautiful. 
     Additionally, under such a straight-tube UV light design scheme, functional components and parts are harder to mount due to the thin and long space of the tubular light body, but the light can derivate different lengths and power sizes of UV lights as well as different types of UV lights (for example, ventilation-type UV lights can be derived into upper-layer flat irradiation UV light or direct irradiation UV light. 
     Definition and characteristics of different types of UV lights: 
     (1) Direct irradiation UV light: The light directly exposes UV rays to an open environment for sterilization and disinfection of object surfaces and air, achieving a high sterilization and disinfection effect; however, people should not stay in the sterilization environment when the light is working, so the safety performance is low. 
     (2) Ventilation-type UV light: Such lights inhale air into the enclosed light cavity, after UV sterilization and disinfection in the light cavity, sterilized air is exhausted out of the light to finish air sterilization and disinfection and ventilation. They are mainly used for air disinfection. People do not need to leave the sterilization place when such lights are working, so people can be protected from the damage of UV rays, man-machine symbiosis can be realized, and the safety performance is high; however, the sterilization efficiency is low, noises are likely to occur during ventilation, and products are usually designed into large-size cabinets, so they have a large volume and a heavy weight. 
     (3) Upper-layer flat irradiation UV light: By mounting the UV light to an upper space that is 2.1 m above the ground or floor, the UV light can irradiate UV rays horizontally to sterilize and disinfect the upper space. During disinfection with the light, people can act in the lower space below 2.1 m, and do need to leave the sterilization place, enabling a high safety level. However, the product is usually designed into a large-size cabinet structure featured with a big volume and heavy weight. 
     During implementation of the product, the light body can be made of aluminum alloy profile that is easy to cut into different lengths. To facilitate installation of corresponding parts into a thin and long space, the inner surface of the light body is provided with a chute structure. The UV light source, control power supply or optical subassembly can be mounted onto the support in advance, and then the support is pushed to the corresponding position along the chute to realize assembly of corresponding parts. All the parts can be mounted with different supports, and can share one support. When the UV light is provided with a fan, the fan can be fixed on to the end cover in advance, and then the end cover can be fixed onto the end of the light to realize mounting of the fan. For example, the end cover is provided with a mounting column, the fan is fixed onto the mounting column, which can reduce noises caused by vibration of the fan arising from installation of the fan onto the support. 
     As shown in  FIG.  1   , when the UV light is an upper-layer flat irradiation UV light, the front side of the light body is provided with a light outlet. The mounting cavity opposite to the light outlet is provided with a grating subassembly that distributes light to make the UV rays emit in the horizontal direction. Both the front side and the rear side of the light body can be provided with a light outlet. The front light outlet and the rear light outlet are provided with a grating subassembly. The light is designed into an upper-layer flat irradiation UV light that can emit light in two opposite directions. 
     As shown in  FIG.  14   , when the UV light is a ventilation-type UV light, there is no additional opening on the upper surface, lower surface, front surface or rear surface of the light body, and either of the first air hole and or the second air hole serves as the air inlet, and the other serves as the air outlet. And, the corresponding position of the first air hole and the second air hole is provided with an anti-exposure structure (e.g. the filter structure  24  and baffle  3  in the embodiment), avoiding leakage of UV rays in the mounting cavity and improving the service safety of the light. 
     As shown in  FIG.  24   , the UV light enables properties of both the ventilation-type UV sterilization and the direct irradiation UV sterilization. This direct irradiation scheme may be direct UV sterilization or direct lighting. The lower side of the light body is provided with the second opening, and the light body is provided with a dismountable second cover plate for sealing the second opening. The second cover plate is elongated. After opening the second cover plate, components and parts inside the mounting cavity can be easily mounted or dismounted, including the first light source subassembly and the control power supply. This is another scheme for mounting functional components and parts inside a small thin and long space. Functional components and parts can be mounted onto the upper surface of the second cover plate or the inner surface of the light body. The lower surface of the second cover plate is provided with the second light source module. The first light source module applies UV light source. The second light source module applies UV light source or white light source to emit corresponding UV rays or visible light. 
     Among the above-mentioned several types of UV lights, the first end cover, the second end cover, fan, UV light source, control power supply, support and other key parts can be designed into common standard parts. And, the light body can be made of aluminum profile. Except the light outlet on the light body or the second outlet that needs post-processing, the dimensions and structure of the chute and other mounting components inside the light may be unified to realize unified standards of the light mold. Such a straight-tube UV light straight-tube UV light design scheme is very suitable for standardizing parts of different types of lights, by which the cost can be significantly reduced via batch production, strong-UV lights may be widely applied by common civil sterilization, solving some existing industry problems like big volume and expensive price of strong-UV lights. Such a design scheme has a new application prospect. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic diagram showing the structure of an embodiment of the straight-tube UV light of the present invention based on the upper-layer flat irradiation UV light design scheme; 
         FIG.  2    is a schematic diagram showing the breakdown of a local part of the straight-tube UV light in  FIG.  1   ; 
         FIG.  3    is a schematic diagram showing the breakdown of another local part of the straight-tube UV light in  FIG.  1   ; 
         FIG.  4    is the a schematic diagram showing the structure of the grating subassembly in  FIG.  2   ; 
         FIG.  5    is a schematic diagram showing the structure of the cross section of A-A in  FIG.  4   ; 
         FIG.  6    is a schematic diagram showing the structure of the cross section of the baffle in  FIG.  5   ; 
         FIG.  7    is a schematic diagram showing the structure of baffle in  FIG.  4   ; 
         FIG.  8    is a schematic diagram showing the structure of the inside of the straight-tube UV light in  FIG.  1   ; 
         FIG.  9    is a schematic diagram showing the structure of the inside of the straight-tube UV light in  FIG.  1   ; 
         FIG.  10    is another schematic diagram showing the structure of the inside of the straight-tube UV light in  FIG.  1   ; 
         FIG.  11    is a schematic diagram showing the structure of the cross section of the light body in  FIG.  2   ; 
         FIG.  12    is a schematic diagram showing the explosive view of the sensing module in  FIG.  3   ; 
         FIG.  13    is a schematic diagram showing the explosive view of the sensing module in  FIG.  3    from another perspective; 
         FIG.  14    is a schematic diagram showing the breakdown structure of an embodiment of the straight-tube UV light of the present invention based on the ventilation-type UV light design scheme; 
         FIG.  15    is a schematic diagram showing the structure of the cross section of the straight-tube UV light in  FIG.  14   ; 
         FIG.  16    is a schematic diagram showing the structure of the cross section of the straight-tube UV light in  FIG.  15    from another perspective; 
         FIG.  17    is a schematic diagram showing the structure of assembling parts in  FIG.  16   ; 
         FIG.  18    is a schematic diagram showing the structure of light cap in  FIG.  15   ; 
         FIG.  19    is a schematic diagram showing the structure of the baffle of another embodiment in  FIG.  15   ; 
         FIG.  20    is a schematic diagram showing the structure of the inside of the straight-tube UV light in  FIG.  15   ; 
         FIG.  21    is a schematic diagram showing the structure of the opening face of the straight-tube UV light in  FIG.  15   ; 
         FIG.  22    is a schematic diagram showing the amplifying structure of position B in  FIG.  21   ; 
         FIG.  23    is a schematic diagram showing the structure of the light body of another embodiment in  FIG.  14   ; 
         FIG.  24    is a schematic diagram showing the structure of an embodiment of the straight-tube UV light of the present invention based on the ventilation-type and direct irradiation UV light design scheme; 
         FIG.  25    is a schematic diagram showing the structure of another service state of the straight-tube UV light in  FIG.  24   ; 
         FIG.  26    is a schematic diagram showing the structure of the cross section of the straight-tube UV light in  FIG.  24   ; 
         FIG.  27    is a local schematic diagram of the straight-tube UV light in  FIG.  24   ; 
         FIG.  28    is a schematic diagram showing the structure of the light body in  FIG.  24   . 
     
    
    
     The shape, dimension, proportion or position relationship of parts of the product in drawings may be real data of embodiments and they are under protection of the present invention. 
     DETAILED DESCRIPTION 
     To make the objective, technical solutions and advantages of the present invention clearer and be understood better, further detailed descriptions of embodiments of the present invention are made in combination with drawings. Understandably, the specific embodiments described are just used to explain but not limit the present invention. 
     As shown in  FIG.  1   - FIG.  28   , the present invention provides a straight-tube UV light  10  that mainly comprises the light body  1 , end covers  2  and functional subassemblies; wherein, the light body  1  is a hollow tubular structure in a straight line shape, and it is defined that the length extension direction of the light body  1  is the left-right direction, the height extension direction is the up-down direction, and the width extension direction is the front-rear direction; end cover  2  comprises the first end cover  2  and the second end cover  2  that cover the left opening and the right opening of the light body  1  respectively, forming the mounting cavity  40  with the light body  1 , the first end cover  2  and the second end cover  2  are respectively provided with the first air hole  21  and the second air hole  21  that connect the mounting cavity  40  and the outside; all the functional subassemblies are provided inside the mounting cavity  40 , functional subassemblies at least include the first light source subassembly  23  and control subassemblies, and control subassemblies connect to the first light source subassembly  23  to control UV rays emitted by the first light source subassembly  23  for sterilization and disinfection. 
     The light body  1  of the UV light  10  is designed into a straight tubular structure. The light body  1  is of a hollow tubular structure in a straight line shape. Each of two ends of the light body  1  is provided with an end cover  2 , the light body  1  and two ends cover  2  enclose each to form a mounting cavity  40  that serves as the main structure of the light. Functional components and parts (i.e. functional subassemblies) like the UV light source, fan  20 , control power supply  30  or optical modules are provided in the mounting cavity  40 . All the functional components and parts are protected, stored and mounted in a unified way via the main structure to significantly reduce the volume of the light, simplify the protective structure of the light and improve the sealing property of the product. Functional components and parts are mounted in the mounting cavity  40 , by which components and parts are less likely to be exposed, and then the appearance of the light is more concise and beautiful. 
     The upper-layer flat irradiation straight-tube UV light  10  is as shown in  FIG.  1   - FIG.  13   . 
     As shown in  FIG.  1   - FIG.  3   , in one embodiment, functional subassemblies also include the grating subassembly  4  in the mounting cavity  40 , the front side of the light body  1  is provided with the first opening  11 , the first opening  11  is opposite to the first light source subassembly  23 , the grating subassembly  4  is provided between the first light source subassembly  23  and the first opening  11 ; wherein, grating subassembly  4  comprises several parallel baffles  41  provided at intervals and horizontally, two adjacent baffles  41  form a light emitting slot, the first light source subassembly  23  emits UV rays along the light emitting slot to the outside of the light body  1  for sterilization and disinfection. The surface of baffles  41  is provided with a light absorption layer that can be black UV ray absorption materials with oxidized anode or coated UV ray absorption materials; before entering the light emitting slot, UV rays are scattered, UV rays with a big included angle with the light emitting direction will be intercepted by baffles  41  or absorbed by the surface of baffles  41 , so that UV rays emitted by the light will be emitted roughly in the horizontal direction. 
     Further, the side of the end cover  2  on one side or both sides nearby the mounting cavity  40  is provided with a support pillar  22 ; functional subassemblies include the fan  20  that is fixed onto the end cover  2  via the support pillar  22 , the fan  20  is opposite to the air hole  21 , that is, only one end cover  2  can be provided with one fan  20 , or both end covers  2  can be provided with a fan  20  respectively; when two fans  20  are adopted, they can inhale air into the light at the same time, and then air is exhausted out of the light via the grating subassembly  4 ; or air can be exhausted via end covers  2  and inhaled via the light outlet of the grating subassembly  4  at the same time; in such a way, air convection can be accelerated, and the sterilization and disinfection efficiency is improved. 
     In another embodiment, the inside of the light may be not provided with a fan  20 , end covers  2  on both ends may be not provided with an air hole  21 , surrounding air is sterilized and disinfected only with UV rays emitted via baffles  41 , because the effective sterilization distance of UV rays emitted horizontally by the strong UV light source whose power is above 20 W can be above 5 m, and the sterilization effect is very good. 
     In one embodiment, both the front side and the rear side of the light body  1  are provided with a light outlet, two light outlets are provided with two corresponding grating subassemblies  4 , UV rays emitted by the first light source subassembly  23  go out of the light body  1  respectively via two grating subassemblies  4 , improving the UV sterilization scope and efficiency. 
     From  FIG.  3   - FIG.  5   , in one embodiment, the grating subassembly  4  at least includes one connecting structure  44 , each connecting structure  44  includes one central column  45  and multiple connecting columns  46 , several parallel baffles  41  and several connecting columns  46  enclose the central column  45  at intervals, enabling multiple baffles  41  to be provided at the light outlet evenly and more stably. 
     Wherein, the bottom of the central column  45  is provided with a sliding part  57 . Correspondingly, the inner side of the light body  1  is provided with a chute structure  12 . The sliding part  57  and the chute structure  12  collaborate with each other, enabling the grating subassembly  4  to move to the preset assembly position along the chute structure  12 . The grating subassembly  4  is fixed onto the light body  1  in a dismountable way via the locating device  6 . 
     Specifically, the central column  45  is a hollow structure. One gasket  47  is fixed to the bottom of the central column  45  via the bolt  93 , and the gasket  47  serves as one sliding part  57  to make the grating subassembly  4  slide inside the light body  1 ; the locating device  6  may be several trim strips  61  provided inside the chute, after the grating subassemblies  4  slide to the preset position, one end of the trim strip  61  holds onto the sliding part  57 , the other end holds onto the end cover  2  to fix the connecting structure  44 ; or bolts or other fastening parts are added between the light body  1  and the connecting structure  44  to fix grating subassembly  4 . 
     In another embodiment, the bottom of the central column  45  may be provided with one stud bolt  93  whose head is provided inside the chute structure  12  and serves as the sliding part  57  to make the grating subassembly  4  slide inside the light body  1 . 
     As shown in  FIG.  6    and  FIG.  7   , in one embodiment, the body  42  of baffles  41  is provided in a curve shape to form multiple convex  43   a  on the surface  111  of baffles  41  and multiple convex  43   b  on the lower surface  112  of baffles  41 , and at least partial upper convex  43   a  and lower convex  43   b  are connected in sequence to form a consecutive waveform structure; baffles  41  may include a horizontal baffle and two consecutive waveform structures, the horizontal baffle as the middle part of baffles  41  is provided horizontally, and two consecutive waveform structures are connected by horizontal plate bodies to form baffles  41 ; the middle of the horizontal plate bodies is provided with a mounting hole  49  that is used for fixing baffles  41 . Compared with flat baffles  41 , baffles  41  in this embodiment can intercept a large angle of UV rays segments by segments, make other UV rays in non-horizontal directions be gradually attenuated and filtered, so that the luminous angle of grating subassembly  4  can be reduced without increasing the width of baffles  41  or narrowing the spacing of baffles  41 ; second, by adopting waveform baffles  41 , it is easier for the light to realize the safety level of the exempt group in the IEC 62471 Light and Light System Photobiological Safety and achieve good application values. 
     Specifically, baffles  41  are about 0.8 mm thick and 60 mm wide, the spacing of baffles  41  is 6.8 mm, the height difference between the top of the upper convex  43   a  and the bottom of the lower convex  43   b  is greater than 1.5 mm, which enables other non-horizontal UV rays to be attenuated and filtered better. Of course, there will be a certain error in actual manufacture, which should be regarded as being within the scope of the present invention. 
     As shown in  FIG.  3    and  FIG.  8   - FIG.  10   , in one embodiment, functional subassemblies also include the support  5  provided inside the mounting cavity  40 , and the first light source subassembly  23  and the control power supply  30  are fixed onto the support  5  respectively. 
     Specifically, support  5  is composed of the reflective part  51  and the connecting part  52 , the reflective part  51  is an arc structure, the concave surface of the reflective part  51  faces the first opening  11 , the first light source subassembly  23  provided inside the convex surface of the reflective part  51  reflects UV rays other than those from the first opening  11  to improve the quantity of UV rays form the first opening  11 . 
     The inner surface of the light body  1  is provided with a chute structure  12 , the bottom of the connecting part  52  is provided with a sliding part  57 , the sliding part  57  and the chute structure  12  collaborate with each other to make the support  5  move to the preset assembly position along the chute structure  12  and make the support  5  fix into the light body  1  in a dismountable way via the locating device  6 , facilitating dismounting of support  5  and further inspection, maintenance or repair of functional subassemblies. wherein, the locating device  6  may be several trim strips  61  provided inside the chute, after the support  5  slides to the preset position, one end of the trim strip  61  holds onto the sliding part  57 , the other end holds onto the end cover  2  to fix the support  5 ; or bolts or other fastening parts are added between the light body  1  and the support  5  to fix support  5 . 
     If it is defined that the concave surface of the reflective part  51  is the front, the opposite surface of the concave surface is the back, the connecting part  52  comprises two supporting arms  53  provided at intervals, two supporting arms  53  are provided on the back of the reflective part  51  to form the first mounting slot  54 , and the control power supply  30  is fixed inside the first mounting slot  54 ; sliding part  57  is provided on one end of each supporting arm  53  far from the reflective part  51 . 
     Further, the reflective plate  55  is provided against the concave surface of the reflective part  51  to improve the reflection efficiency of UV rays. Wherein, the reflective plate  55  can be mirror-surface metal sheet that can reflect UV rays better. 
     Further, straight-tube UV light  10  also comprises a handle  56  provided on one end of support  5 , the handle  56  drives the support  5  to push or pull the light body  1  along the chute structure  12 , facilitating the user to operator. 
     Further, the first light source subassembly  23  comprises the first light source  231  and the mounting base  232 , the mounting base  232  is fixed onto the handle  56 , the mounting base  232  is used to fix the first light source  231  and supply power for the first light source  231 , the first light source  231  and the reflective part  51  are provided at intervals, that is, there is a certain clearance between the first light source  231  and the reflective part  51 , enabling UV rays emitted by the first light source  231  onto the reflective part  51  to be reflected better. 
     As shown in  FIG.  11   - FIG.  13   , in one embodiment, the straight-tube UV light  10  also comprises a sensing module  8  that electrically connects to the control power supply  30  and is provided under the front surface of the light body  1 ; wherein, the sensing module  8  is an infrared sensing module that only receives horizontal sensing signals, when the human body reaches the sensing height of the sensing module  8 , the sensing module  8  will automatically turn off the first light source  231 . The sensing module  8  is provided under the front surface of the light body  1 , that is, it is provided below the UV rays emitted, to monitor human body before the human body enters the UV ray irradiation scope, so that it can better prevent human body being hurt by UV rays in the irradiation scope. 
     Wherein, the sensing module  8  comprises the sensing element  81 , fixing base  82 , lens  85  and circuit board  87 , the sensing element  81  is provided on the circuit board  87 , fixing base  82  is provided on the first pass-through slot  821 , circuit board  87  is fixed onto the fixing base  82 , sensing element  81  is provided inside the first pass-through slot  821 , lens  85  covers the other end of first pass-through slot  821  in a fixed way to cover the light outlet of the first pass-through slot  821 ; lens  85  is a semitransparent or transparent material, its inner surface is provided with many kinds of optical convex patterns that enable the sensing probe to receive horizontal sensing signals and vertical sensing signals to be significantly weakened. 
     The inner surface of the light body  1  is provided with the first arc surface  17 , the fixing base  82  comprises one or several parallel convex blocks  83  where there is the second arc surface  84 , the second arc surface  84  is against the first arc surface  17 , the lower part of the front surface of the light body  1  is provided with the second pass-through slot  18 , the lens  85  is inserted into the second pass-through slot  18 , by which the sensing module  8  is fixed onto the light body  1 . This fixing mode is simpler and more efficient, and no other fixing structures are needed to fix the sensing module  8 . 
     Further, the lens  85  is square, the side of the lens  85  opposite to the sensing element  81  is provided with a square slot  86  whose bottom wall surface is provided with circles of convex patterns which further weaken vertical sensing signals. 
     The ventilation-type straight-tube UV light  10  is as shown in  FIG.  14   - FIG.  23   . 
     As shown in  FIG.  14    and  FIG.  15   , in one embodiment, functional subassemblies include fan  20  provided inside the light body  1  for conveying air; except two open ends, other parts of the light body  1  is enclosed, one of the first air hole  21  and the second air hole  21  is used for flow-in of air, and the other is used for flow-out of air, forming a horizontal and straight air duct that serves as the channel for flow-in and flow-out of air during sterilization of the light. Compared with existing design, such a flat and straight air duct is relatively short and is just a little longer than the UV light source, which can shorten the path for flow-in and flow-out of air and effectively reduce the volume of the light; in addition, since the light body  1  is a straight barrel, the flow-in and flow-out resistance is small, and the sealing property is good, preventing air leakage when fan  20  runs and improving the ventilation efficiency of the UV light  10 . In this embodiment, the power of the UV light source is 100 W, but the light dimension is only 140×140×900 mm. 
     Wherein, the first air hole  21  or the second air hole  21  is the combination of several thin and long holes whose width is smaller than 6.5 mm, preventing human body contacting internal electrified body. The light body  1  can be made of aluminum profile via the extrusion process. 
     In one embodiment, the quantity of fan  20  is one or two; when there is one fan  20 , the side of the first end cover  2  nearby the mounting cavity  40  is provided with a support pillar  22 , the fan  20  is fixed onto the first end cover  2  via the support pillar  22 ; when there are two fans  20 , the side of both the first end cover  2  and the second end cover  2  nearby the mounting cavity  40  is provided with the support pillar  22 , two fans  20  are respectively installed onto the support pillar  22  of the first end cover  2  and the second end cover  2 , fans  20  and end covers  2  form a module, fans  20  can be dismounted after removing end covers  2 , fans  20  can be installed onto the end covers  2  first, and then the end covers  2  are used to cover the light body  1 , which facilitates mounting and dismounting and avoids more complex internal structure inside the light body  1 . Specifically, one end of the support pillar  22  is provided with threads, and the fan  20  is fixed onto the support pillar  22  through collaboration between nut  94  and support pillar  22 . 
     Further, as shown in  FIG.  14   , a filter structure  24  is provided between the end cover  2  and the fan  20  for filtering particles and dust in the air and preventing UV rays being out of the light. Wherein, the filter structure  24  can include the first filter screen and the second filter screen, the first filter screen can be made of foam for adsorbing and filtering small particles, dust and other hazardous substances, the second filter screen is used for filtering large particles and clamping the first filter screen; the support pillar  22  is enclosed by the supporting piece  28  provided between the second filter screen and the end cover  2 , preventing failure of the first filter screen arising from excessive extrusion. Of course, only the second filter screen can be provided for filtering large particles, preventing damage to the structure inside the light body  1 . Wherein, the middle of the second filter screen is a latticed pore structure, the size of the latticed pore is smaller than 1 mm. 
     As shown in  FIG.  11 ,  16 ,  17 ,  22   , in one embodiment, the outer surface of the light body  1  is provided with the third mounting slot  15  for setting the assembling part  9 , both sides of the light body  1  are provided with two assembling parts  9  for installing the straight-tube UV light  10  onto the preset position. 
     Specifically, the assembling part  9  includes the mounting plate body  95  and two bosses  91  provided symmetrically on both ends of the mounting plate body  95  respectively, and two bosses  91  can be a hollow structure that is supported and reinforced by rib slabs on both sides; the first fixing hole  88  is provided on the mounting plate body  95  between two bosses  91  for fixing the assembling part  9  onto the straight-tube UV light  10 ; the upper surface of at least one boss  91  is provided with a hanging hole  92  for collaborating with external hanging parts; the second fixing hole  89  is provided on the mounting plate body  95  inside two bosses  91 , the second fixing hole  89  is opposite to the hanging hole  92  and can also be used to fix the assembling part  9  onto the light. When connecting and fixing the assembling part  9  and the light body  1 , bolt  93  goes through the first fixing hole  88 , collaborates with the nut  94  to fix the bolt  93 , the cap of the bolt  93  is provided inside the third mounting slot as the sliding part  57 , assembling part  9  slides onto the preset position, nut  94  is fastened, the assembling part  9  is fixed above the third mounting slot  15 , facilitating adjustment of the position of the assembling part  9 . In this embodiment, when the straight-tube UV light  10  is placed horizontally, the boss  91  can be used as a supporting leg; when the straight-tube UV light  10  is mounted onto the wall, detachable connection can be realized via the hanging hole  92 . 
     Further, as shown in  FIG.  22   , one end or two ends of the third mounting slot  15  is/are provided with the avoiding hole  16 , when the end cover  2  is not open, the bolt for fixing the assembling part  9  or other fasteners can be directly installed into the third mounting slot  15  via the avoiding hole  16 , by which the assembling part  9  can be mounted without dismounting the end cover  2 , enabling fast and convenient installation. 
     In one embodiment, as shown in  FIG.  16   , functional subassemblies also comprise the reflective plate  55  that is provided around the first light source subassembly  23 . Reflective plate  55  is used for reflecting UV rays. After times of reflection, the utilization efficiency of UV rays can be improved. 
     As shown in  FIG.  18 - 20   , in one embodiment, the straight-tube UV light  10  also comprises the baffle  3  provided inside the mounting cavity  40 , the baffle  3  is provided between the first light source subassembly  23  and one end cover and is vertical to the length of the light body  1 ; the board  31  of the baffle  3  is provided with a ventilation structure that is provided with the ventilation slot  34  for ventilation, the ventilation slot  34  can prevent UV rays vertical to the plane of the board  31  from being emitted onto the other side of the plane  31 , preventing damage to human body caused by UV rays out of the light body  1 . 
     Specifically, the ventilation structure of the baffle  3  comprises multiple convex parts  33  and multiple ventilation slots  34 , the ventilation slots  34  are holes for connecting both sides of the board  31 , convex parts  33  are a prominent structure on the board  31  for shielding UV rays, the projection of the convex parts  33  on the plane of the board  31  covers the projection of the ventilation slot  34  on the plane of the board  31 ; according to the distribution of multiple convex parts  33  and multiple ventilation slots  34 , the ventilation structure can be a unilateral ventilation structure  32   a  or a bilateral ventilation structure  32   b ; as shown in  FIG.  18   , this is the unilateral ventilation structure  32   a , multiple convex parts  33  and multiple ventilation slots  34  are provided on one side of the board  31  of the baffle  3 ; as shown in  FIG.  19   , this is the bilateral ventilation structure  32   b , multiple convex parts  33  and multiple ventilation slots  34  are respectively provided on one side of the board  31  of the baffle  3 ; in this embodiment, ventilation is realized with the ventilation slot  34 , the opening of the ventilation slot  34  is vertical to the board  31 , preventing damage to human body caused by UV rays emitted by the first light source subassembly  23  via the opening of the ventilation slots  34 . 
     It needs to be noted that for convex parts  33  and ventilation slots  34  in the unilateral ventilation structure  32   a  and the bilateral ventilation structure  32   b , it is not required that their shape and connection relationship are completely the same, and the shape and connection relationship of their convex parts  33  and ventilation slots  34  may be different. 
     In one embodiment, baffle  3  is fixed onto the support pillar  22  of the end cover  2 . Sheet parts are hard to be fixed inside the light body  1 , and it is hard to operate if it is deep, so the baffle  3  can be fixed onto the end cover  2  before installing the end cover  2  in this embodiment, and then end cover  2  is fixed onto the light body  1 , facilitating mounting and dismounting. 
     In one embodiment, the above-mentioned ventilation structure of baffle  3  can be applied to end cover  2 , at least one air hole of the first air hole  21  and the second air hole  21  should be provided as the unilateral ventilation structure  32   a , or at least one air hole of the first air hole  21  and the second air hole  21  should be provided as the bilateral ventilation structure  32   b , further preventing damage to human body caused by UV rays from the light body  1 . 
     As shown in  FIG.  16    and  FIG.  20    and  FIG.  21   , in one embodiment, functional subassemblies also include the support  5  provided inside the mounting cavity  40 , and the first light source subassembly  23  and the control power supply  30  are respectively fixed onto the support  5 . wherein, the inner surface of the light body  1  is provided with a chute structure  12 , the support  5  is provided with a sliding part  57 , the sliding part  57  and the chute structure  12  collaborate with each other, enabling that the support  5  can move to the assembly position along the chute structure  12  and then can be fixed into the light body  1  in a dismountable way via the locating device  6 . When installing and replacing the first light source subassembly  23  or the control power supply  30 , the support  5  can be pulled out of or pushed into the mounting cavity along the chute to improve the convenience of installation and maintenance. Specifically, the cross section of the chute of the chute structure  12  can be in the “T” shape or the “L” shape; the locating device  6  can be multiple pressing strips  61  provided inside the chute, after the support  5  slides to the preset position, one end of the pressing strips  61  is against the sliding part  57 , the other end is against the end cover  2  to fix the connecting structure  44 , or bolts  93  or other fastening parts are added between the light body  1  and the connecting structure  44  to fix the support  5 . 
     Further, one end of the support  5  is provided with a handle  56  on which there is a hollow groove for firm holding in service, the handle  56  drives the support  5  to be pushed into or pulled out of the light body  1  along the chute structure  12 , facilitating movement of the support  5  and winding of lead wire inside the light. 
     Specifically, the support  5  includes the base plate  58  and the supporting plate  59 , the sliding part  57  is provided on one side of the base plate  58 , the supporting plate  59  is provided on the other side of the base plate  58 ; the first light source subassembly  23  comprises the first light source  231  provided on the supporting plate  59  that supports the first light source  231  above the base plate  58  in a suspension way; the control power supply  30  is provided on the base plate  58  and is between the base plate  58  and the first light source  231 . 
     More specifically, the handle  56  is provided with the mounting base  232  that connects to the control power supply  30  in an electric way, and connects to the electric connection end of the first light source  231  and fixes it onto the mounting base  232 , supplies power to the first light source  231  via the mounting base  232  and fixes one end of the first light source  231 , the other end of the base plate  58  is provided with the supporting plate  59 , the upper side of the supporting plate  59  is provided with a protective lantern ring  60  in a nesting way, the other end of the first light source  231  goes through the protective lantern ring, and the supporting plate  59  and the protective lantern ring  60  fix the other end of the first light source  231 . 
     Of course, both ends of the base plate  58  can be provided with the supporting plate  59 , the first light source  231  goes through two supporting plates  59 , so that the first light source  231  can be fixed firmly. 
     Wherein, the first light source  231  can be a UV light tube or UV LED module. 
     As shown in  FIG.  21    and  FIG.  22   , in one embodiment, one end of the light body  1  is provided with the fixing opening  14  that can be a “U” shaped gap, the connecting part of the power cable  7  and the light body  1  of the straight-tube UV light  10  can be provided with a fixing block  71 , the lateral side of the fixing block  71  corresponding to the fixing opening  14  is provided with the second mounting slot  72 , the fixing block  71  slides inside the fixing opening  14  via the second mounting slot  72 , when the fixing block  71  slides to the extreme position inside the fixing opening  14 , the fixing block  71  completely covers the fixing opening  14 , and the end cover  2  is against the fixing block  71  to fix the power cable  7 . 
     In one embodiment, the chute structure  12  can be realized in the way where the chute is provided on the light body  1  and the slide rail is provided on the support  5 ; or a slide rail can be provided on the light body  1 , and a chute is provided on the support  5 ; or other locating structures are provided on the inner surface of the light body  1 , the corresponding device on the support  5  can push the support  5  to other structures at the preset position on the light body  1 , as shown in  FIG.  23   , the inner surface of the light body  1  is provided with a supporting face  13 , the support  5  can slide on the supporting face  13 , and the support  5  is fixed onto the light body  1  after it slides to the preset position. All these schemes can make mounting and dismounting of the support  5  more convenient and faster. 
       FIG.  24   - FIG.  28    show the straight-tube UV light  10  that combines the ventilation-type scheme and the direct irradiation scheme. 
     As shown in  FIG.  24   - FIG.  26   , in one embodiment, the lower part of the light body  1  is provided with the second opening  19 , the straight-tube UV light  10  also comprises the second cover plate  110  that covers the second opening  19  for sealing, the top of the cover plate faces the inside of the mounting cavity  40 , the bottom of the cover plate faces the downward (outside), the second cover plate  110  and the light body  1  are connected in a dismountable way, so that the second cover plate  110  can cover or open the second opening  19 . By opening the second cover plate  110 , the structure inside the light body  1  or on the second cover plate  110  can be dismounted, making repair, maintenance or replacement of parts inside the light body  1  or on the cover plate more convenient. 
     Wherein, the second cover plate  110  can connect to the light body  1  via the hinge or in other connection way, the first light source subassembly  23  and the control power supply  30  are fixed onto the top of the second cover plate  110 , by opening the second cover plate  110 , the first light source subassembly  23  and the control power supply  30  can be replaced and installed, enabling convenient operation. Of course, the second cover plate  110  can be opened to expose the internal structure of the light body  1 , so the first light source subassembly  23  and the control power supply  30  can be fixed onto the inner surface of the light body  1 . In other embodiments, the second opening  19  can also be provided on different surfaces of the light body, the second opening  19  is provided with other functional components and parts, such as light source, fan, protective net shield, control module and optical subassembly to realize corresponding functions. 
     Further, the side of the first end cover  2  nearby the mounting cavity  40  is provided with the fan  20 , or/and, the side of the second end cover  2  nearby the mounting cavity  40  is provided with the fan  20  to improve the air supply efficiency and improve the sterilization and disinfection efficiency of the straight-tube UV light  10 . 
     Further, the straight-tube UV light  10  comprises the second light source module  25  provided at the bottom of the second cover plate  110 , and the second light source module  25  directly emits UV rays or visible light to the external environment; when the second light source module  25  emits UV rays, the straight-tube UV light can enable the ventilation type and the direct irradiation sterilization and disinfection, significantly improving the sterilization and disinfection efficiency of the light, the ventilation mode can be applied when there are people on the sterilization site, and the direct irradiation mode can be applied when there is no people on the sterilization site; when the second light source module  25  emits visible light, the straight-tube UV light can enable the sterilization and disinfection and lighting and emits visible light below provide lumination, realizing two functions of one light. In such a case, the second cover plate  110  can serve as a reflective housing whose middle is provided with a reflective concave reflective slot, the second light source module  25  is provided inside the concave reflective slot which reflects via the concave reflective slot the light emitted onto the second cover plate  110  to improve the illuminating rate. 
     Further, the straight-tube UV light  10  also comprises the protective net shield  120  that covers the second cover plate  110  and the second light source module  25 . The protective net shield  120  prevents foreign objects or human bodies from touching the second light source module  25 , so that foreign objects will not damage the second light source module  25  or the second light source module  25  brings damage to human bodies. 
     In one embodiment, the second light source module  25  comprises the mounting base  232  and the second light source  26 , the mounting base  232  is provided with a sensing device  27  which comprises a signal receiving element that is used for receiving the external control signal (e.g. control signal of the remote control), the control power supply  30  controls work of the straight-tube UV light  10  according to the control signal, by which the working condition, working mode of the straight-tube UV light  10  can be controlled or its working parameters can be adjusted from a distance, avoiding exposure of human body to the UV light source. 
     Further, the infrared sensor or microwave sensor can be provided inside the sensing device  27 , when human body approaches the working light, the sensor will automatically turn off the second light source  26  to ensure safety of the user. 
     In one embodiment, the straight-tube UV light  10  also comprises a display  50  electrically connecting to the control power supply  30 , the display  50  can display the working condition of the straight-tube UV light  10 , so that the working condition of the light can be monitored and displayed. For example, 
     (1) After the sterilization time of the remote control is set, the display  50  displays the sterilization time of the light; 
     (2) After the fan gear is set with the remote control, the gear FIG. of the fan is displayed; 
     (3) When the air filter screen reaches the preset service life, it will be prompted that the air filter screen should be replaced timely; 
     (4) When the accumulative service time of the light source reaches the preset service life, it is prompted that the light source should be replaced timely. 
     In one embodiment, the top of the light body  1  is also provided with the third opening  140 , the straight-tube UV light  10  also comprises the third cover plate  150  that covers the third opening  140 , and the third cover plate  150  is provided with the third air hole  21 ; the first air hole  21  and the second air hole  21  are respectively provided with a fan  20 , two fans  20  blow air to the outside of the light body  1 , under the action of two fans  20 , the first air hole  21  and the second air hole  21  serve as the air outlet, the third air hole  21  serves as the air inlet, so that air can be flow from the top to the bottom, promoting circulation of the air around the light, air flows into the light body  1  via the middle third air hole  21 , passes through the first light source  231  for sterilization and disinfection, and then is exhausted to the outside of the light body  1  via the first air hole  21  and the second air hole  21 , improving the sterilization and disinfection efficiency of the straight-tube UV light  10 . 
     Further, the side of the third cover plate  150  nearby the accommodating cavity is also provided with a filter structure  24  that covers the third air hole  21  and filters air that flows into the light body  1 , improving the air purification effect of the light and facilitating replacement of the filter structure  24 . 
     As shown in  FIG.  27   , in one embodiment, the inner wall of the light body  1  corresponding to the second opening  19  is provided with two convex ribs  130  that are respectively nearby the two opposite surfaces of the second opening  19 , when the second cover plate  110  covers the second opening  19 , two convex ribs  130  shield the mounting joint of the second cover plate  110  and the second opening  19 , preventing leakage of the UV ray and improving the supporting strength of the second cover plate  110  during installation. 
     As shown in  FIG.  28   , in one embodiment, the light body  1  is a straight-tube structure formed through enclosing of the first arc surface  1   a , the second arc surface  1   b , the third arc surface  1   c  and the fourth arc surface  1   d , since four arc surfaces can reflect UV rays, the utilization efficiency of the UV light source inside the light body  1  form by four arc surfaces can be improved. 
     Wherein, the first arc surface  1   a  is provided with the third opening  140  and the wiring hole  170  for connecting lead wire, the power cable  7  goes through the wiring hole  170  and connects to the control power supply  30  to supply power for the light; the mounting opening of the display  50  is provided on the fourth arc surface  1   d ; the second opening  19  is provided on the third arc surface  1   c.    
     The above description only presents the preferred embodiments of the present invention, and it is not for this reason that the patent scope of the invention is limited. Any equivalent structural transformation made by using the description of the invention and the drawings, or direct/indirect application in other related technical fields under the inventive concept of the invention, is included in the patent protection scope of the invention.