WO2017045577A1

WO2017045577A1 - Air blowing device

Info

Publication number: WO2017045577A1
Application number: PCT/CN2016/098754
Authority: WO
Inventors: 喻学锋
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2015-09-18
Filing date: 2016-09-12
Publication date: 2017-03-23
Also published as: CN205134254U

Abstract

An air blowing device (1) comprises: a housing (22), an air inlet (41) being provided on the housing (22), and air entering from the air inlet (41); a motor (5), located inside the housing (22); an axial flow fan (43), driven by the motor (5), rotating along an axis (44) of the axial flow fan (43), and generating an air flow; and an air blowing pipe (3), connected to the housing (22) and having an air outlet (42), the air flow being blown out from the air outlet (42). The housing (22) further comprises an air flow channel (4) extending in the axis direction of the axial flow fan (43), and the air inlet (41) defined by the air flow channel (4) is oriented downwards when the air blowing device (1) is at a working position.

Description

Blowing device

Technical field

The invention relates to a blowing device.

Background technique

In daily life, the hair dryer is a relatively common tool, usually used to clean the surface of large areas such as gardens or streets, or the surface of the garbage. Compared with the traditional broom or scorpion, the cleaning efficiency is greatly improved, and the labor can be saved. And thus it is widely used.

The device consists essentially of an air passage that directs air movement, the air passage including an air inlet at one end of the air passage, the end portion being generally located adjacent to the user; the air passage further includes an air outlet at the other end of the air passage, the end portion Usually located away from the user; and a fan located in the middle of the air passage. The fan can usually be an axial fan or a centrifugal fan. The fan draws in air from the air inlet and then discharges it outward from the air outlet.

The patent document US20080127448 describes a hair dryer provided with a centrifugal fan. However, such a device is heavier in weight, has a large energy consumption, and has a relatively large operational noise. In particular, direct noise pollution is generated to the surrounding environment and the user as the fan rotates and air passes through obstacles in the airflow. Moreover, such noise pollution usually affects the health of the user, resulting in the user having to wear some hearing protection devices, such as earplugs, helmets and the like.

In the patent document DE102007037012, the air inlet portion and the air outlet portion are mounted on the rotation axis of the fan constituted by a plurality of augers connected to each other by the driving of the electric motor. However, the noise of this device is still relatively high and the performance is average.

In summary, various representative documents of the prior art have disadvantages such as high energy consumption, low performance, and noise pollution, so it is necessary to improve the prior art means.

Summary of the invention

In view of the above, it is an object of the present invention to provide a blowing device that effectively reduces noise and optimizes its performance.

In order to achieve the above object, the technical solution adopted by the present invention is: a blowing device comprising a casing, the casing is provided with an air inlet, air is introduced from the air inlet; and a motor is located inside the casing; An axial flow fan, driven by the motor to rotate along a fan axis and generate an air flow; a blowing pipe connecting the casing and having an air outlet, the air flow is blown out from the air outlet, wherein the casing further includes a body edge An air flow passage extending in a direction of the fan axis, the air inlet defined by the air flow passage in the air blowing Oriented downward when the machine is in the working position.

Preferably, the motor is located in a downstream region of the axial fan.

Preferably, the centerline of the air inlet forms an angle of 90 degrees with the fan axis.

Preferably, the motor is disposed in the air flow passage and disposed adjacent to the air inlet.

Preferably, the air flow passage includes a bottom wall through which the fan axis passes and side walls disposed in parallel along a direction in which the fan axis extends, and the air inlet is disposed on the side wall.

Preferably, the blowing device further comprises a handle for gripping, the handle being disposed above the air inlet.

Preferably, the air blowing device further includes a motor cover that wraps the motor, and the air flow passage is formed between the motor cover and the housing.

Preferably, the blower further includes a cooling passage connecting the inside of the motor cover, the cooling passage being disposed independently of the air flow passage.

Preferably, the cooling passage includes a cooling port on the casing, and the cooling port is disposed separately from the air inlet.

Preferably, the hair dryer has two working modes of at least a blowing mode and a suction mode, wherein in the blowing mode, the axial fan rotates in a first direction, and air enters from the air inlet and is blown out from the air outlet, sucking In the mode, the axial fan rotates in a second direction, and air enters from the air outlet and blows out from the air inlet.

Compared with the prior art, the invention has the beneficial effects that the air inlet is facing downwards in the working position, that is, facing the ground, so that the generated noise is far away from the worker, thereby reducing noise.

DRAWINGS

The above described objects, technical solutions and advantageous effects of the present invention can be clearly obtained from the following detailed description of the embodiments of the present invention.

The same numbers and symbols in the drawings and the description are used to represent the same or equivalent elements.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view of a hair dryer of a first embodiment of the present invention.

Figure 2 is a schematic illustration of the hair dryer of Figure 1 in a working position.

Figure 3 is a schematic view of a hair dryer in accordance with a second embodiment of the present invention.

1, blowing device 2, the main body 3, duct

4, air flow channel 5, motor 6, safety shield

7, handle 21, interface 22, housing

41, air inlet 42, air outlet 43, fan

44. Fan axis 45, straight pipe 46, bottom wall

47, side wall 51, motor cover 52, cooling channel

53, the cooling port

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which the advantages and features of the invention can be more readily understood by those skilled in the art.

As shown in Figure 1-2, the blowing device 1 mainly comprises a main body 2 and a duct 3 connecting the main bodies 2. In a preferred embodiment, the duct 3 is detachably connected to the body 2. When the blowing device 1 is not required, the duct 3 can be stored separately from the main body 2, facilitating convenient storage and reducing the size of the floor. The main body 2 is provided with an interface 21 having a contour shape similar to that of the air duct, so that the air duct 3 is connected to the main body 2 through the interface 21. When the duct 3 is connected to the main body 2, the duct 3 and the main body 2 constitute an air flow passage 4. The air flow passage 4 includes an air inlet 41 at the end of the passage, an air outlet 42 and a fan 43 located in the middle of the passage. The air inlet 41 is provided on the main body 2 and is located at one end close to the user. The air outlet 42 is disposed on the air duct 3 and is located at an end away from the user. Air enters the air flow passage 4 from the air inlet 41 and is blown out from the air outlet 42. In addition, the main body 2 includes a housing 22, and the interface 21 and the air inlet 41 are both disposed on the housing 22.

The fan 43 is located inside the casing 22, and the fan 43 is disposed between the air inlet 41 and the air outlet 42. In an embodiment, the fan 43 is an axial fan. The axial fan rotates about a fan axis 44 and the fan 43 rotates to form a plane of rotation P of a vertical fan axis 44. The air inlet 41 and the air outlet 42 are respectively located on opposite sides of the plane of rotation P. It is considered that air enters from the air inlet 41 and passes through the fan 43, and then passes out from the air outlet 42. Therefore, the air inlet 41 is located on one side of the upstream region belonging to the rotational plane P, and the air outlet 42 is located on one side of the downstream region belonging to the rotational plane P.

A motor 5 that drives the rotation of the fan is also provided in the housing 22. The motor 5 is directly connected to the fan 43 and provides rotational power. The motor 5 is located in the upstream region of the axial fan, so that the motor 5 and the air inlet 41 are located on the same side of the axial fan. The motor 5 is disposed close to the air inlet 41.

On the other hand, the motor 5 is supplied by a battery pack that can be inserted into the air blower 1 or an AC power cord. Electricity.

As shown in Fig. 2, when the blowing device 1 is in the working position, the air outlet 41 is aligned with the ground, so that the airflow blown from the air outlet 42 can effectively reach the ground. The air inlet 41 is oriented downward. In this working position, the handle 7 of the blowing device 1 is located above the air inlet 41 and is oriented upwards. The handle 7 allows the user to hold the blowing device 1 in the hand and orient the duct 3 towards the area to be cleaned.

As shown in Figure 1, the air flow passage 4 also includes a linear duct 45 located in the upstream region of the axial flow fan. The linear duct 45 is linear in its entirety and extends in the fan axis 43 direction of the fan. It includes a bottom wall 46 that is passed through the fan axis 44, and two side walls 47 that connect the bottom wall 46, respectively. The two side walls 47 are disposed generally parallel to the fan axis 44, and the side walls 47 and the bottom wall 46 generally form a U-shape. In the present embodiment, the air inlet 41 is provided on the side wall 47. The fan axis 44 does not pass through the air inlet 41. The centerline of the air inlet 41 is disposed at an angle to the fan axis 44, and the angle ranges from 60 degrees to 120 degrees. Preferably, the angle is 90 degrees.

On the other hand, the inner surfaces of the side wall 47 and the bottom wall 46 are constructed without any rough smooth surface, so that the air sucked from the air inlet can be prevented from generating turbulence when flowing, which is advantageous for reducing the noise generated by the suction.

In the embodiment shown in Fig. 3, a safety shield 6 is also provided in the vicinity of the air inlet 41 of the air blowing device 1. The safety shield 6 has a grille for preventing foreign matter from entering the air inlet 41. The safety shield 6 may have a curved shape or a planar shape depending on the shape of the air inlet 41. A handle portion for operation is also provided on the safety shield 6. The safety shield 6 is operatively pivoted to open or close the air inlet 41. Of course, in other embodiments, the safety shield 6 can also be connected to the air inlet 41 in a disassembled manner.

In the embodiment shown in FIG. 1, the blowing device 1 further comprises a motor cover 51 encasing the motor 5. An air flow passage 4 is formed between the motor cover 51 and the housing 22. The air flow passage 4 is located between the motor cover 51 and the housing 22. As shown in FIG. 1, the blowing device 1 further includes a cooling passage 52 connected to the inside of the motor cover 51, and the cooling passage 52 is provided independently of the air flow passage 4. The cooling passage 52 further includes a cooling port 53 on the housing 22, and the cooling port 53 is provided separately from the air inlet 41. In the present embodiment, the cooling port 53 is located at the bottom wall 46.

In the present embodiment, the blowing device 1 has at least two operating modes of a blowing mode and a suction mode, wherein in the blowing mode, the axial fan rotates in the first direction, and air enters from the air inlet 41 and is blown out from the air outlet 42. In the suction mode, the axial fan rotates in the second direction, and air enters from the air outlet 42 and Blowed out from the air inlet 41. The first direction is opposite to the second direction.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

A blowing device comprising:

a housing, the housing is provided with an air inlet, and air enters from the air inlet;

a motor located inside the housing;

An axial flow fan driven by the motor to rotate along a fan axis and generate an air flow;

a blowing pipe connecting the casing and having an air outlet, and the airflow is blown out from the air outlet,

The utility model is characterized in that the hair dryer further comprises an air flow passage extending in the direction of the fan axis, and the air inlet defined by the air flow passage is oriented downward when the blower is in the working position.
A blowing device according to claim 1 wherein said motor is located in a downstream region of said axial fan.
The blowing device according to claim 2, wherein a center line of the air inlet forms an angle of 90 degrees with the fan axis.
A blowing device according to claim 2, wherein said motor is disposed in said air flow passage and disposed adjacent said air inlet.
A blowing device according to claim 4, wherein said air flow passage includes a bottom wall through which said fan axis passes and side walls disposed in parallel along said fan axis extending direction, said air inlet being disposed at said On the side wall.
The blowing device according to claim 1, wherein said blowing device further comprises a handle for holding, said handle being disposed above said air inlet.
A blowing device according to claim 1, wherein said blowing device further comprises a motor cover encasing said motor, said air flow passage being formed between said motor cover and said housing.
A blowing device according to claim 7, wherein said blowing means further comprises a cooling passage connected to the inside of said motor cover, said cooling passage being provided independently of said air flow passage.
A blowing device according to claim 1, wherein said cooling passage includes a cooling port on said casing, said cooling port being provided separately from said air inlet.
The air blowing device according to claim 1, wherein the air blowing device has at least two operating modes of a blowing mode and a suction mode, wherein in the blowing mode, the axial fan rotates in a first direction, and the air is driven from the air. The air inlet enters and is blown out from the air outlet. In the suction mode, the axial fan rotates in the second direction, and air enters from the air outlet and is blown out from the air inlet.