Patent Grant
9863437
This application claims the benefit of Chinese Patent Application No. 201320594468.9 filed on Sep. 25, 2013 in the State Intellectual Property Office of China, the whole disclosure of which is incorporated herein by reference.
The present invention relates to a ventilating fan, and particularly to a ventilating fan mounted between a roof and a ceiling.
Firstly, the mounting bracket is mounted between joists, and then the frame 11 is mounted on the mounting bracket. After that, the adapter 15 is passed through the air outlet 16 at the side surface of the frame 11 from an inside of the frame 11, and the engagement sheet 20 of the adapter 15 is inserted into the engagement opening 17 of the frame 11, thereby achieving a temporary fixation of the adapter 15. Next, a screw is passed through the second through hole 14 of the adapter 15 and the first through hole 18 of the frame 11 so that the adapter 15 is mounted over the air outlet 16 of the frame 11.
In the mounting of the adapter 15 to the conventional ventilating fan, use of the screw is necessary. As a result, the number of the mounting steps and the man hour are increased, and the air tightness between the air outlet of the casing and the adapter 15 is bad because they are separated by the head of the screw after the casing has been mounted to the frame 11.
It is an object of the present invention to provide a ventilating fan of which an adapter can be simply and conveniently mounted to a frame.
In order to achieve the above object, there is provided a ventilating fan, it comprises a frame which has a bottom surface formed with an air inlet and a side surface provided with an air outlet; a casing in which a fan motor is mounted; and, an adapter fitted to an air outlet of the casing, wherein first flangings are extended outwards from both vertical side edges of an air inlet of the adapter, second flangings are extended outwards from both horizontal side edges of the air inlet of the adapter, outer edges of the first flangings are first bent towards the casing side to form both side surfaces perpendicular to the first flangings, and then edges of the both side surfaces are bent towards each other to form edge surfaces, and the firstly flangings, the side surfaces, and the edge surfaces confine open grooves; one or more protrusions are disposed on an outer periphery of the air inlet of the adapter near the first flanging or the second flanging, and a slot is formed between the protrusion and any one of the first and the second flangings; and first folded sheets are extended outwards from both vertical side edges of the air outlet of the casing; and an edge of the air outlet of the frame abuts against and is clamped in the slot such that the adapter is locked to the frame, and the first folded sheets is insertable into the open grooves of the adapter from below upwards.
Four side surfaces of the frame excluding a top surface and the bottom surface are inclined outwards and downwards from the top surface towards the bottom surface, and the air outlet at the side surface of the frame, the air inlet of the adapter, and the air outlet at the casing are parallel to one another.
The four side surfaces are inclined outwards and downwards from the top surface towards the bottom surface at an angle of 0.5-5 degrees.
A lower opening of the open groove is greater than an upper opening of the open groove, and the lower opening of the open groove is gradually narrowed upwards to form a guide groove.
The lower opening of the open groove is gradually narrowed upwards until the lower opening of the open groove is slightly wider than the folded sheet of the casing and closely clamps the folded sheet of the casing.
A second folded sheet is extended from a lower side edge of the air outlet of the casing towards an outside of the air outlet of the casing, and a lower portion of the second folded sheet is perpendicularly bent towards the adapter side to form a stop sheet; and when the adapter and the casing are connected together, the first and second flangings of the adapter and the first and second folded sheets of the casing abut against each other.
The casing is provided with a snap.
The snap is provided with a protrusion, and the frame is formed with an engagement groove corresponding to the protrusion.
An upper portion of the second flanging is perpendicularly bent towards the casing side to form a stop piece.
The ventilating fan according to the embodiment of the present invention is advantageous in that tightness between the adapter and the air outlet of the casing is higher.
As shown in the figures, a ventilating fan 30 according to the embodiment of the present invention comprises a frame 40 which has a bottom surface 45 formed with an air inlet and a side surface 46 provided with an air outlet 41; a casing 60 in which a fan motor 62 is mounted; and, an adapter 50 connected to an air outlet 61 of the casing 60. First flangings 51 are extended outwards from both vertical side edges (i.e., left and right side edges) of an air inlet 59 of the adapter 50, second flangings 55 are extended outwards from both horizontal side edges (upper and lower side edges) of the air inlet 59 of the adapter 50, outer edges of the first flangings 51 are firstly bent towards the casing 60 side to form both side surfaces 52 perpendicular to the first flangings 51, and then edges of the side surfaces 52 are bent towards each other to form edge surfaces 53, and, the first flangings 51, the side surfaces 52, and the edge surfaces 53 confine these open grooves 54. One or more protrusions 56 are disposed on an outer periphery of the air inlet 59 of the adapter 50 near the first flanging 51 or the second flanging 55, and a slot 57 is formed between the protrusion 56 and any one of the first flanging 51 and the second flanging 55; and first folded sheets 63 are extended outwards from both vertical side edges (i.e., left and right side edges) of the air outlet 61 of the casing 60. A second folded sheet 64 is extended from a lower side edge of the air outlet 61 of the casing 60 towards an outside of the air outlet 61 of the casing 60. The casing 60 is provided with two snaps 67 and 68. The snaps 67 and 68 are provided with protrusions 671 and 681, respectively, and the frame 40 is formed with an engagement groove 42 corresponding to the protrusion 671, and an engagement groove (not shown) corresponding to the protrusion 681.
In this embodiment, provisions of the protrusions 56 and the slot 57 near the second flanging 55 is taken for example. However, according to actual requirements, one or more protrusions may also be disposed on the outer periphery of the air inlet 59 of the adapter 50 near the first flanging 51, and a slot is formed between the protrusion and the first flanging 51.
As shown in the figures, in this embodiment, the casing 60 is provided with the two snaps 67 and 68. The snap 67 is disposed on the second folded sheet 64, and the snap 68 is disposed on a part of the casing 60 opposite to the snap 67. The snaps 67 and 68 are provided with the protrusions 671 and 681, respectively. Each of the snaps 67 and 68 has one surface inclined from the casing 60 side in a direction away from the casing 60, and another surface disposed horizontally. When the casing 60 is mounted to the frame 40 from below upwards, the protrusion 671 will slide into the engagement groove 42 through the inclined surface so that the protrusion 671 can easily enter the engagement groove 42. In this way, the horizontally disposed surface will be engaged with the engagement groove 42. Therefore, it is difficult for the protrusion to slide out of the engagement groove 42. As a result, the casing 60 is temporarily fixed to the frame 40 and will not fall down. Hence, the mounting is much more convenient and easier, and, even one person can complete the mounting.
During the mounting, firstly, the frame 40 is fixed to joists (not shown) and then the adapter 50 is passed through the air outlet 41 at the side surface 46 of the frame 40 from an inside of the frame 40. The one or more protrusions 56 are disposed near the first flanging 51 or the second flanging 55, and the slot 57 is formed between the protrusion 56 and any one of the first flanging 51 and the second flanging 55. An edge of the air outlet 41 of the frame 40 abuts against and is clamped in the slot 57 such that the adapter 50 is locked onto the frame 40. Next, the first folded sheets 63 at the air outlet 61 of the casing 60 are inserted into the open grooves 54 of the adapter 50 from below upwards while the protrusion 671 of the snap 67 disposed on the casing 60 is engaged into the engagement groove 42 disposed in the frame 40 and corresponding to the protrusion 671, and the protrusion 681 is engaged into the corresponding engagement groove (not shown). In this way, the casing 60 is temporarily fixed inside the frame 40. In order to firmly fix the casing 60 inside the frame 40, the frame 40 and the casing 60 each needs to be formed with one, two or more openings 44 and 66 in corresponding positions in advance. Then, screws are passed through the openings 44 and 66 to fix the casing 60 inside the frame 40. In this way, since the casing 60 is connected with the adapter 50 by inserting the first folded sheets 63 at the air outlet 61 of the casing 60 into the open grooves 54 disposed at the air inlet 59 of the adapter 50, it is not necessary to use a screw to perform the connection. The adapter 50 is closely connected with the casing 60 by the open grooves 54 and the air tightness therebetween is highly ensured.
In this way, the adapter 50 can be mounted simply and conveniently, and the tightness between the adapter 50 and the air outlet 61 of the casing 60 is improved.
The air outlet 41 at the side surface 46 of the frame 40, the air inlet 59 of the adapter 50, and the air outlet 61 of the casing 60 are parallel to one another. In other words, the air inlet 59 of the adapter 50, and the air outlet 61 of the casing 60 are inclined at the same angle as the side surface 46 of the frame 40 where the air outlet 41 is disposed.
The first folded sheets 63 at the air outlet 61 of the casing 60 are inserted into the open grooves 54 of the adapter 50 from below upwards while the protrusion 671 of the snap 67 disposed on the casing 60 is engaged into the engagement groove 42 disposed in the frame 40 and corresponding to the protrusion 671, and the protrusion 681 is engaged into the corresponding engagement groove (not shown). The casing 60 is temporarily fixed inside the frame 40. In order to firmly fix the casing 60 inside the frame 40, the frame 40 and the casing 60 each needs to be formed with one, two or more openings 44 and 66 in corresponding positions in advance. The casing 60 is fixed to the top surface 43 of the frame 40 by the screws. As a result, an upwardly urging force is applied to the casing 60, and, an upward acting force, and a horizontal acting force towards the adapter 50 are applied to the side surface of the frame 40 by the side surface of the casing 60 where the air outlet 61 is disposed so that the connection between the casing 60 and the adapter 50 is more tightly to improve the tightness.
Furthermore, as shown in
With the above-mentioned structure, when the first folded sheets 63 of the air outlet 61 of the casing 60 are inserted into the open grooves 54 of the adapter 50 from below upwards, the first folded sheets 63 can be very easily inserted accurately into the lower portion having the greater opening, and then the first folded sheets 63 are moved into the guide grooves. The first folded sheets 63 are accurately entered the upper portions having the smaller openings by guidance of the guide grooves 543 of which the openings are gradually reduced upwards. In this way, the first folded sheets 63 of the casing 60 are very smoothly inserted closely into the open grooves 54 of the adapter 50.
In addition, as shown in
When the adapter 50 and the casing 60 are connected together, the first flangings 51 and the second flanging 55 of the adapter 50 and the first folded sheets 63 and the second folded sheet 64 of the casing 60 abut against each other, to enhance air tightness and prevent air leakage.
For example, the lower portion of the second folded sheet 64 having a width of 20 mm is perpendicularly bent towards the adapter 50 side to form the stop sheet 65 having a width of around 1-2 mm. After the first folded sheets 63, which have a width of 10 mm, of the air outlet 61 of the casing 60 are inserted to an appropriate position in the open grooves 54 of the adapter 50 from below upwards (i.e., in a position where the air outlet 61 of the casing 60 is completely aligned with the air inlet 59 of the adapter 50), the stop sheet 65 at the lower portion of the second folded sheet 64 having the width of 20 mm will be stopped by the second flanging 55 disposed on the lower side of the adapter 50, and the casing 60 cannot be further pushed upwards. In other words, the casing 60 cannot be further pushed over the appropriate position.
In addition, even if the stop sheet 65 fails due to wear, it can be stopped by the stop piece 100 of the second flanging 55 so that the casing 60 cannot be further moved upwards.
Therefore, it can be ensured that the air outlet 61 of the casing 60 is completely aligned with the air inlet 59 of the adapter 50, and misalignment between them cannot occur, thereby improving the tightness between the adapter 50 and the air outlet 61 of the casing 60.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2013 2 0594468 U | Sep 2013 | CN | national |
| Number | Date | Country |
|---|---|---|
| 2009186060 | Aug 2009 | JP |
| Number | Date | Country | |
|---|---|---|---|
| 20150086354 A1 | Mar 2015 | US |
