Abstract:
A ventilating fan including a ventilating fan body provided with a motor, a frame having ventilating air outlets, and fan blades, an adapter and an electric element box. The ventilating air outlets include a top air outlet provided on a top face of the frame of the ventilating fan and a side air outlet provided on a side face of the frame of the ventilating fan which are communicated with each other. The adapter is provided with a raised structure adapted to the ventilating air outlet. With this structure, the height of the ventilating fan is reduced while air volume is ensured, so that the ventilating fan is adapted to be mounted onto various ceilings, and the cost can be saved while mounting of the adapter is simplified.

Description:
FIELD OF THE INVENTION 
     The present disclosure relates to a ventilating fan, and in particular, to a thin-type ventilating fan mounted on an indoor ceiling. 
     DESCRIPTION OF THE RELATED ART 
       FIG. 1  is a schematic view of a conventional ventilating fan in the prior art. A ventilating fan  10  comprises a ventilating fan body provided with a motor, a frame  11 , fan blades and the like, an adapter  13  fixed on the frame  11  by an engaging member  12 , and an electric element box  14  provided on the top surface of the frame  11 . The frame  11  is provided at a side thereof with a ventilating air outlet  15 . The end of the adapter  13  connected with the ventilating air outlet  15  is a fixing section  16 , and the other end connected with a conduit is a tail portion  17 . Air inside a room and air outside the room can be exchanged by means of the fixing section  16  and the tail portion  17  of the adapter  13 . 
     In the prior art as above, the ventilating air outlet  15  is provided at a side of the frame  11  of the ventilating fan. In order to ensure an appropriate amount of air flow, the ventilating air outlet  15  must be configured to have a larger size. A ceiling is located between the ventilating air outlet  15  and a flange  19 . Therefore, in order to prevent interference between the adapter  13  mounted on the ventilating air outlet  15  and the ceiling, the lowest point of the ventilating air outlet  15  should be separated from the flange  19  by a certain distance. Thus, the ventilating fan is required to have a greater thickness. In practice, the distances between mounted ceilings and the roof are different. In a case where the thickness of the ventilating fan is great and the distance between the indoor ceiling and the roof is short, the conventional ventilating fan cannot be mounted. 
     Further, in the above prior art, since an engaging member should be separately provided to be connected with the adapter, an additional new mould has to be made for the engaging member, and additional processes, such as butt weld and dusting, are needed, which leads to a higher cost of the product. Furthermore, extra working time is required for fixing the engaging member to the frame of the ventilating fan. 
     SUMMARY 
     Accordingly, it is desirable to provide a novel thin-type ventilating fan where the thickness of the ventilating fan is reduced while an appropriate amount of air flow is ensured. 
     In order to achieve the above object, the ventilating fan according to the present disclosure comprises a ventilating fan body provided with a motor, a frame having ventilating air outlet and fan blades, an adapter and an electric element box. The ventilating air outlet comprises a top air outlet provided on a top face of the frame of the ventilating fan and a side air outlet provided on a side face of the frame of the ventilating fan which are communicated with each other, and the adapter is provided with a raised structure adapted to the ventilating air outlet. 
     The raised structure is configured to be a structure that is formed by enclosing the top air outlet by an upper portion of a fixing section of the adapter and is gradually inclined upward, and the height of the raised structure is less than or equal to the height of the electric element box. 
     The raised structure is made of resin material. 
     An engaging structure integrally formed with the frame and engaged with the adapter is provided at a side of the top air outlet closer to the electric element box. 
     The engaging structure is a bending piece provided at a side of the top air outlet closer to the electric element box and engaged with the adapter, and the upper end of the bending piece is provided with a first oblique face and the lower end of the bending piece is provided with a first vertical face perpendicular to the frame. 
     An upper portion of a fixing section of the adapter is provided at a ventilating air-passageway side of the raised structure thereof with a structure, the upper end of which is provided with a second oblique face and the lower end of which is provided with a second vertical face perpendicular to the frame. 
     The top face of the frame is provided with a reinforcement rib. 
     The fixing section of the adapter has a shape adapted for mounting the frame, and comprises a horizontal portion enclosing the periphery of the top air outlet and a vertical portion enclosing the periphery of the side air outlet, and the lower end of the vertical portion is provided with protrusion pieces which are inserted into a flange of the frame and the upper portion of the vertical portion is provided with a mounting portion configured to fix the fixing section of the adapter to the frame. 
     The advantage of the present disclosure is that the height of the ventilating fan is reduced while ensuring an air volume, so that the ventilating fan is adapted to be mounted onto various ceilings, and the cost can be lowered while simplifying mounting of the adapter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view of the prior art; 
         FIG. 2  is a general schematic view of the present disclosure; 
         FIG. 3  is a schematic view, in cross-section, of the ventilating adapter according to the present disclosure; 
         FIG. 4  is a schematic view of the ventilating air outlet according to the present disclosure; 
         FIGS. 5A and 5B  are perspective views of the ventilating adapter according to the present disclosure, seen from two different angles of view; and 
         FIG. 6  is a schematic view, in cross-section, of a mounting operation of the ventilating adapter according to the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 2  is a general schematic view of the present disclosure.  FIG. 3  is a schematic view, in cross-section, of a ventilating adapter according to the present disclosure. As shown in Figs., the ventilating fan  10  comprises a ventilating fan body provided with a motor, a frame  100  having ventilating air outlet  110 , fan blades, and like, an adapter  200  and an electric element box  300 . 
       FIG. 4  is a schematic view of a ventilating air outlet according to the present disclosure.  FIGS. 5A and 5B  are schematic perspective views of the ventilating adapter according to the present disclosure, viewed from two different perspectives. As shown in  FIGS. 3-5B , the ventilating air outlet  110  comprises a top air outlet  111  provided on a top face  101  of the frame  100  of the ventilating fan and a side air outlet  112  provided on a side face  102  of the frame  100  of the ventilating fan which are communicated with each other. The top air outlet  111  and the side air outlet  112  together form the ventilating air outlet  110 . In this way, even in a case where the area of the side air outlet  112  is reduced, the total area of the ventilating air outlet  110  can be kept unchanged or can be increased. 
     The end of the adapter  200  connected with the ventilating air outlet  110  is a fixing section  220 , and the other end located downstream of the ventilating air outlet  110  and connected with a conduit is a tail portion  210 . As shown in Figures, the fixing section  220  is in a proximate inverted-L shape, which surrounds the periphery of the ventilating air outlet  110  and is fixed to the periphery of the ventilating air outlet  110 . As such, the fixing section  220  has a shape adapted for mounting the frame  100 , and comprises a horizontal portion  221  enclosing the periphery of the top air outlet  111  and a vertical portion  222  enclosing the periphery of the side air outlet  112 . The lower end of the vertical portion  222  is formed with an adapter fixing frame  225 . The adapter fixing frame  225  is provided on thereof with protrusion pieces  223  which are inserted into a flange  106  of the frame  100 . The upper portion of the vertical portion  222  is provided with a mounting portion  24  configured to fix the fixing section  220  of the adapter  200  to the frame  100 . 
     Since the adapter  200  will be connected with the top air outlet  111  and the side air outlet  112 , tight contact between the adapter fixing frame  225  and the frame  100  is critical. Tight contact between faces can be easily realized. However, it is very difficult to realize tight contact between the adapter  200  and a corner portion  104  at which the top face  101  and the side face  102  of the frame  100  intersect. In this embodiment, the protrusion pieces  223  provided on the lower end of the vertical portion  222  and to be inserted into the flange  106  of the frame  100  are first inserted into openings  105  on the flange  106 . Then, the vertical portion  222  is fixed to the frame  100  by means of the mounting portion  224  and a screw hole  107  provided on the upper portion of the frame  100 . Finally, the adapter fixing frame  225  is fixed on the frame  100  by screws. In this way, the corner portion  104  formed by intersection of the top face  101  provided with the top air outlet  111  and the side face  102  provided with the side air outlet  112  can also tightly contact with the adapter fixing frame  225 . Thus, the top air outlet  111  and the side air outlet  112  can tightly connect with the adapter  200  so as to prevent air leakage. 
     In order that the adapter fixing frame  225  can tightly contact with the frame, the screw hole  107  is preferably provided at an end portion which is outside the side air outlet  112  and in proximity of the side air outlet  112 , or at a corner region which is surrounded by the above end portion and a sideline  104 . 
     The upper portion of the fixing section  220  of the adapter  200  including the horizontal portion  221  encloses the top air outlet  111  and is formed with a raised structure  211  gradually inclined upward. The raised structure  211  is formed to be adapted to the airflow blown from the top air outlet  111  to the tail portion  210 . The height H 1  of the raised structure  211  is less than or equal to the height H 2  of the electric element box  300 . In this way, during ventilating, the airflow blown out from the fan blades blows to the top air outlet  111  and the side air outlet  112  simultaneously. Since the raised structure  211  forms an inclined face, the inclined face guides the airflow blowing toward the top air outlet  111  to smoothly blow toward the adapter tail portion  210  along the raised structure  211  and then to be discharged to outdoor through the conduit without generating turbulence flow. Since the top face  101  of the frame of the ventilating fan itself is provided thereon with the electric element box  300  and the thickness of the raised structure  211  is substantially the same as the height of the electric element box  300 , the thickness of the ventilating fan will not be additionally added. Thus, since the side air outlet  112  becomes smaller, the height of the frame  100  of the ventilating fan can be reduced, i.e., the frame  100  becomes thinner as a whole. Even if a distance between a ceiling and a roof is short, there is enough space for mounting the ventilating fan. Further, since the raised structure is provided to the adapter made of resin material instead of the frame, metal material can be saved. 
     On the top face  101  of the frame  100 , there is provided a reinforcement rib  103  protruding upward from the top face  101  to reinforce the strength of the frame  100  so as to improve safety and durability of products. The reinforcement rib  103  may be in any shape and may be provided at any position on the top face  101  of the frame  100  as long as the performance of the products will not be negatively influenced. For instance, an elongated reinforcement rib  103  is provided on the side of the electric element box  300  close to the adapter  200 , and such reinforcement rib  103  reinforces the strength of the top face  101  of the frame  100  without negatively influencing configuration of the elements on the top face of the frame  100 . 
       FIG. 6  is a schematic view, in cross-section, of a mounting operation of the ventilating adapter according to the present disclosure. As shown in the Fig., on the side of the top air outlet  111  close to the electric element box  300 , there is provided an engaging structure integrally formed with the frame  100  and engaged with the adapter  200 . The engaging structure is a bending piece  120  provided on the side of the top air outlet  111  close to the electric element box  300  and engaged with the adapter  200 . The upper end of the bending piece  120  is provided with a first oblique face  127 , and the lower end of the bending piece  120  is provided with a first vertical face  128  perpendicular to the frame  100 . The adapter fixing section  220  is provided with a structure matching with the bending piece  120  at a position on the adapter fixing section  220  where the adapter fixing section  220  contacts with the bending piece  120 , that is, the upper portion of the adapter fixing section  220  is provided at a ventilating air-passageway side of a raised structure  211  thereof (inside the raised structure  211 ) with a structure, the upper end of which is provided with a second oblique face  227  and the lower end of which is provided with a second vertical face  228  perpendicular to the frame  100 . Since the frame  100  is integrally formed with the engaging structure  120 , unlike the prior art, no separate engaging structure is needed. The engaging structure  120  is provided on the side of the top air outlet  111  close to the electric element box  300 . After the mounting operation of the adapter  200 , the top air outlet  111  can be entirely hooded by the adapter  200 . 
     During mounting of the ventilating fan  10  onto the ceiling, the adapter  200  is first fixed to the ceiling by screws. Then, alignment of the ventilating fan  10  from bottom to top is performed, that is, the bending piece  120  integrally formed with the frame  100  is aligned and engaged with the adapter  200 . Since the upper end of the bending piece  120  is provided with the first oblique face  127 , when the bending piece  120  is engaged into the adapter fixing section  220  from bottom to top, the first oblique face  127  functions to guide the bending piece  120 , so that the bending piece  120  can be easily and smoothly engaged into the adapter fixing section  220 . In this way, the whole ventilating fan can be mounted and fixed to the ceiling. After mounting, since the lower end of the bending piece  120  is provided with the first vertical face  128  perpendicular to the frame  100  and the lower end of the upper portion of the adapter fixing section  220  is provided with a second vertical face  228  perpendicular to the frame  100 , the two vertical faces are fitted to each other, so that the adapter  200  can be prevented from moving outward with respect to the ventilating fan body and hence the adapter  200  can be securely mounted.