Patent Application
20190376522
The present disclosure relates to a ventilation fan and, in particular, to a ventilation fan that can reduce the noise and increase the air pressure and air quantity.
As the progress of technology and industry, people have paid more attention on their living qualities. One of most concerned topics is the quality of air, which is highly related to people's health. However, in order to reduce noise interference, isolate heat transfer, and keep the room temperature, the modern buildings are mostly constructed by specific material to provide airtight indoor spaces. Accordingly, the air discharging of the indoor spaces becomes insufficient, so that some harmful contaminants cannot be exhausted effectively and still remained in the rooms.
In addition, the general ventilation fan is designed to simply exchange inside and outside air, and it cannot adjust the air exchange modes according to different requirements of the users. Besides, the conventional ventilation fan usually generates laud noise. Generally, the conventional ventilation fan is composed of an air outlet, an impeller, an air channel, and a grill. The spatial design of the air channel has a certain limitation due to the height of the impeller and the size of the air outlet. Thus, this conventional ventilation fan has poor air exchange performance and cannot effectively reduce the noise.
Therefore, it is desired to provide a ventilation fan that can reduce the noise and increase the air pressure and air quantity.
An objective of the present disclosure is to provide a ventilation fan that can reduce the noise and increase the air pressure and air quantity.
This disclosure provides a ventilation fan, which includes a fan and a housing. The fan includes a base, a scroll casing and an impeller. The base is used for supporting a driving device. The scroll casing has an air inlet, an air outlet, a top portion, a bottom portion corresponding to the top portion, and a slope surface connecting the top portion and an edge of the air outlet. The top portion and the bottom portion together define a channel height. A ratio of the channel height to a height of the air outlet ranges from 1.1 to 2, and the channel height ranges from 110 mm to 200 mm. The impeller is disposed in the scroll casing, and the driving device drives the impeller to rotate. The housing is used for accommodating the fan and has an opening corresponding to the air outlet of the scroll casing. An air outlet duct is disposed on the side of the housing and communicated with the air outlet of the scroll casing, and a baffle is disposed inside the air outlet duct.
In one embodiment, a ring structure is disposed on the base and located around a periphery of a driving circuit of the driving device.
In one embodiment, the ventilation fan further includes a grill assembling on the housing.
In one embodiment, an extension direction of the air inlet is perpendicular to an extension direction of the air outlet.
In one embodiment, an included angle between an extension direction of the top portion and the slope surface ranges from 16 degrees to 52 degrees.
In one embodiment, the included angle between the extension direction of the top portion and the slope surface is 17.7 degrees.
In one embodiment, the channel height is 125 mm, and the height of the air outlet is 100 mm.
In one embodiment, an accommodating space is formed between the top portion and the bottom portion, and the impeller is disposed in the accommodating space.
In one embodiment, the accommodating space is an annular space.
In one embodiment, the driving device is a motor, and the motor includes a driving circuit for driving the impeller to rotate.
In one embodiment, a diversion element is disposed on the scroll casing and located around of the inlet of the scroll casing.
As mentioned above, in the ventilation fan of this disclosure, the slope surface connects the top portion and an edge of the air outlet, a ratio of the channel height to the height of the air outlet ranges from 1.1 to 2, and the channel height ranges from 110 mm to 200 mm. Thus, the ventilation fan of the disclosure can reduce the noise and increase the air pressure and air quantity.
The present disclosure will become more fully understood from the subsequent detailed description and accompanying drawings, which are given by way of illustration only, and thus are not limitative of the present disclosure, and wherein:
The present disclosure will be apparent from the following detailed description, which proceeds with reference to the accompanying drawings, wherein the same references relate to the same elements.
A ventilation fan of this disclosure can reduce the noise and increase the air pressure and air quantity. The structure and features of the ventilation fan of the disclosure will be described hereinafter.
Besides, as shown in
In this embodiment, the ventilation fan 1 further includes a grill 13, which is assembled on the housing 12.
In this embodiment, the extension direction of the air inlet 1121 is perpendicular to the extension direction of the air outlet 1122 (referring to the arrow directions of
In this embodiment, an included angle between the extension direction of the top portion 1123 and the slope surface 1125 ranges from 16 degrees to 52 degrees. Preferably, the included angle between the extension direction of the top portion 1123 and the slope surface 1125 is 17.7 degrees.
In this embodiment, the channel height H is 125 mm, and the height of the air outlet 1122 is 100 mm (see
In this embodiment, an accommodating space S is formed between the top portion 1123 and the bottom portion 1124, and the impeller 113 is disposed in the accommodating space S.
In this embodiment, the accommodating space S is an annular space.
In this embodiment, the driving device 114 is a motor, and the motor includes a driving circuit for driving the impeller 113 to rotate.
To sum up, in the ventilation fan 1 of this disclosure, the slope surface 1125 connects the top portion 1123 and the edge of the air outlet 1122, a ratio of the channel height H to the height of the air outlet 1122 ranges from 1.1 to 2, and the channel height H ranges from 110 mm to 200 mm. Thus, the ventilation fan 1 of the disclosure can reduce the noise and increase the air pressure and air quantity.
Although the present disclosure has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternative embodiments, will be apparent to persons skilled in the art. It is, therefore, contemplated that the appended claims will cover all modifications that fall within the true scope of the present disclosure.
