Patent Publication Number: US-2023144967-A1

Title: Active air purification device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to air purification equipment, especially an active air purification device. 
     2. Description of the Related Art 
     At present, there are many different types of air purification equipment on the market, and one of them uses photocatalyst as a purification mechanism. Most of these products are coated with photocatalyst on a filter, and then the filter is set in the air flow channel and a light source is set to illuminate the filter. The flow of air allows the photocatalyst on the filter to contact light and air to react. 
     There are two most basic requirements for the use of this type of product. The first is that the air must be in contact with the filter, and the second is that the filter must be illuminated. The larger the area of the filter receiving light and the area in contact with the air, the better the efficiency of the reaction. At present, the products on the market just let the air flow through a fixed filter, that is, the filter is passively waiting for the air to collide, and the light source is mostly set on the periphery of the filter, which is also fixed relative to the filter, so most of the light can only shine on the outer surface of the filter, so the area that can be reacted will be limited. Especially when the area of the filter is large, the light source arranged on the periphery of the filter is difficult to provide light to the inner middle area of the filter. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstance in view. It is therefore the main object of the present invention to provide an active air purification device, which increases the area of the filter irradiated by light and increases the chance of collision between the filter and the air. 
     To achieve the aforesaid object, the active air purification device of the present invention comprises: a shell defining an accommodating space and an opening; a motor set in the shell and comprising a shaft; a fan blade set located in the accommodating space of the shell and connected to the shaft of the motor and drivable by the motor to rotate; a first filter rotatable along an axis and set on one side of the fan blade set and equipped with a photocatalyst; and a light source module comprising a base, a lower ring, an upper ring and a plurality of light source panels. The lower ring is set on the base and rotatable relative to the base. Each light source panel comprises an arc-shaped arm portion, and a light-emitting portion provided on one side of the arc-shaped arm portion. One end of the arc-shaped arm portion of each light source panel is pivoted to the lower ring, and each light source panel rotates relative to the lower ring with the pivot position as the axis, so that the light source panels move from an original close to each other state to a far apart state. 
     Preferably, the light source module is set at the opening of the shell when it is set. 
     Preferably, a filter is provided on each of both sides of the light source module. 
     It can be seen from the above structure that the first filter of the active air purification device of the present invention will be horizontally blocked on the entire flow channel and rotate, forcing air to pass through the first filter before it can enter the shell. Therefore, in addition to the collision of air with the first filter when it is flowing, the rotation of the first filter will also actively increase the probability of air colliding with the filter, and because these light source panels are correspondingly arranged on the mesh surface of the filter, rather than arranged on the periphery of the filter, the range of light irradiation can be increased to achieve the purpose of the present invention. 
     The detailed structure, characteristics, assembly or use mode provided by the present invention will be described in the detailed description of the subsequent implementation mode. However, those with ordinary knowledge in the field of the present invention should be able to understand that these detailed descriptions and the specific embodiments listed in the implementation of the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the patent application of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic elevational of the present invention. 
         FIG.  2    is an exploded schematic diagram of the first embodiment of the present invention. 
         FIG.  3    is an exploded schematic diagram of the light source module of the present invention. 
         FIG.  4    is a front view of the first embodiment of the present invention. 
         FIG.  5    is a front view of the first embodiment of the present invention after removing the second filter and the upper ring. 
         FIG.  6    is the same as  FIG.  5   , and is a schematic diagram of the light source panels of the present invention after being expanded. 
         FIG.  7    is a cross-sectional view in the direction of section line  7 - 7  in  FIG.  1   . 
         FIG.  8    is an exploded schematic diagram of the second embodiment of the present invention. 
         FIG.  9    is the same as  FIG.  7   , which is a cross-sectional view of the second embodiment of the present invention. 
         FIG.  10    is a cross-sectional view of the third embodiment of the present invention. 
         FIG.  11    is an exploded schematic diagram of the fourth embodiment of the present invention. 
         FIG.  12    is a cross-sectional view of the fourth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The applicant first explains here that in this specification, including the embodiments described below and the claims of the scope of patent application, the nouns related to directionality are based on the direction in the diagram. Secondly, in the embodiments and drawings that will be introduced below, the same element numbers represent the same or similar elements or their structural features. 
     Please refer to  FIGS.  1  to  7   , which are the first embodiment of the present invention. The active air purification device of the present invention comprises a shell  10 , a motor  20 , a fan blade set  30 , a first filter  50 , a second filter  51 , and a light source module  60 . 
     The shell  10  defines an accommodating space  11  and an opening  12 . 
     The motor  20  has a shaft  21 , and is located in the accommodating space  11  of the shell  10 . 
     The fan blade set  30  is set in the accommodating space  11  of the shell  10  and connected to the shaft  21  of the motor, and can be driven by the motor  20  to rotate. 
     The first filter  50  and the second filter  51  are set on the same side of the fan blade set  30 . The second filter  51  is coated with a photocatalyst. The first filter  50  and the second filter  51  can rotate along an axis. In this embodiment, the first filter  50  and the second filter  51  are arranged on the motor shaft  21  and can rotate with the shaft  21 . The first filter  50  and the second filter  51  each have a perforation  52  in the center. The shaft  21  is provided with a center column  22 , so that the shaft  21  can extend through the perforation  52  of the first filter  50  and the perforation  52  of the second filter  51  and the shaft  21  can drive the first filter  50  and the second filter  51  to rotate, but it is not limited to this. 
     The light source module  60 , as shown in  FIGS.  2  and  3   , comprises: a base  61 , a lower ring  62 , an upper ring  63 , and a plurality of light source panels  64 . 
     The base  61  is ring-shaped with a hollow area  611  in the middle, and the base is provided with a plurality of convex posts  612  on one side of the ring. 
     The lower ring  62  is set on the base  61  and can rotate relative to the base  61 . The lower ring  62  is provided with a plurality of arc-shaped long holes  621 , and the plurality of convex posts  612  of the base are respectively penetrated in arc-shaped long holes  621 . The lower ring  62  is also provided with a pivot post  622  on one side of each arc-shaped long hole  621 . 
     Since the plural light source panels  64  have the same structure, the structure of one of the light source panels is used as an illustration here. The light source panel has an arc-shaped arm portion  641 , the arm portion  641  is provided with an arc-shaped long guide slot  642 , one side of the arm portion  641  is provided with a light-emitting portion  643 , the light-emitting portion is provided with a plurality of LEDs. The light source panel  64  is pivoted to the pivot post  622  of the lower ring with one end of the arm portion  641 . The light source panel can rotate with the pivot post  622  as the axis relative to the lower ring  62 . The convex post  612  of the base passes through the arc-shaped long hole  621  of the lower ring and then passes through the long guide slot  642 . 
     The upper ring  63  is covered on the lower ring  62 , and is bolted to the convex post  612  of the base, so that the light source panels  64  are located between the upper ring  63  and the lower ring  62 . The upper ring  63  is provided with a plurality of arc-shaped grooves  631 , and the pivot posts  622  of the lower ring  62  are respectively passed through the arc-shaped grooves  631 . 
     The light source module  60  is set at the opening  12  of the shell when it is set up, and the light source panels  64  are located between the first filter  50  and the second filter  51 , and the center of the lower ring  62  is on the same axis as the two perforations  52 , as shown in  FIGS.  2  and  7   . 
     The structure of the present invention is described above. The difference between the present invention and existing products is: When in use, the motor  20  will drive the fan blade set  30  to rotate and drive the air flow through the first filter  50  to the light source panels  64 , then pass the second filter  51  into the shell  10 , and then flow out from the edge of the shell  10 . Moreover, the first filter  50  and the second filter  51  will be horizontally blocked on the entire flow channel and rotate with the rotation of the fan blade set  30 , forcing air to pass through the first filter  50  and the second filter  51  before it can enter the shell. Therefore, in addition to the collision of air with the first filter  50  and the second filter  51  when the air is flowing, the rotation of the first filter  50  and the second filter  51  will also actively increase the probability of the air colliding with the filters. And because the light source panels  64  are arranged between the first filter  50  and the second filter  51 , light can be irradiated to the first filter  50  and the second filter  51  at the same time to increase the range of light irradiation. 
     When the first filter  50  and the second filter  51  need to be removed for cleaning or replacement, the user can turn the lower ring  62 . Due to the rotation of the lower ring  62 , the convex posts  612  of the base  61  will move along the respective arc-shaped long holes  621  of the lower ring  62  and the long guide slots  642  of the respective light source panels  64 , so that the light source panels  64  are forced to rotate around the pivot posts  622  pivoted by the arm portions  641 , so that the light source panels  64  are expanded outward, as shown in  FIG.  6   . In this way, the light source panels  64  can be moved away from the original position between the first filter  50  and the second filter  51 , from the original close to each other state as shown in  FIG.  5    to the state far away from each other as shown in  FIG.  6   , and the first filter  50  and the second filter  51  can then be removed for cleaning or replacement. 
       FIGS.  8  and  9    show the second embodiment of the present invention. The structure in this second embodiment is almost the same as the previous first embodiment. The difference is that in this second embodiment, only the first filter  50  is set and the second filter  51  is not set. 
       FIG.  10    shows the third embodiment of the present invention. In this third embodiment, the structure is similar to the second embodiment, but the first filter  50  is not connected to the shaft  21 , but is only set on one side of the fan blade set  30 . In this third embodiment, the first filter  50  is not driven by the shaft  21  to rotate but is driven by the air flow when the air flows. The airflow is used to drive the first filter  50  to rotate along a virtual axis. The first filter  50  can be set between the light source module  60  and the fan blade set  30 , or the light source module  60  can be set between the first filter  50  and the fan blade set  30 . 
       FIGS.  11  and  12    show the fourth embodiment of the present invention. The structure of this fourth embodiment is similar to that of the first embodiment. In addition to the structure of the first embodiment, a second motor  70  is further provided in this fourth embodiment. The second motor  70  has a shaft  71 . In this fourth embodiment, the first filter  50  and the second filter  51  are not connected to the original motor shaft  21 , but are connected to the shaft  71  of the second motor  70 , so that the first filter  50  and the second filter  51  can be driven to rotate by the second motor  70 . In this way, the rotation speed of the first filter  50  and the second filter  51  can be further controlled, so that their rotation is synchronized or not synchronized with the fan blade set  30 , thereby creating a better chance for the filters to actively collide with the air.