CN102996531B - Bladeless fan with dual angle nozzle - Google Patents

Abstract

The bladeless fan with the double-angle spray pipe mainly comprises an annular airflow injection device 1, a base 2 and an airflow supercharging device 3. The inner side wall of the airflow jet device is provided with the first jet pipe and the second jet pipe at intervals, and the isolating block is arranged between the adjacent first jet pipe and the second jet pipe; and moreover, airflow sprayed by the first spray pipe and the second spray pipe forms two circles of airflow with different directions, so that the situation that the air quantity in the middle of the airflow channel is too small is avoided.

Description

Bladeless fan with dual angle nozzle

technical field

The invention relates to a bladeless fan with a double-angle nozzle, which belongs to the optimization technology of the bladeless fan.

Background technique

In the patent documents with the application number 200810177843.3 and the application number 200810177844.8, a fan is disclosed, which consists of a base and an annular exhaust port installed on the base. The inner channel of the airflow and the exhaust port, the air outside the fan is sucked by the airflow ejected from the exhaust port, so that the airflow blowing to the user is increased. The advantage of this design is that there are no exposed blades, which solves the problems that the blades are difficult to clean and has potential safety hazards, and reduces noise. The Coanda effect is used to change the flow direction of the air from the exhaust port and drive the air outside the fan to flow to the user. In order to ensure the air volume, the power of the suction fan must be increased and the speed of the suction fan must be increased.

Usually, the bladeless fan adopts the design of the annular nozzle, the angle of the annular nozzle is fixed, and usually there is only one annular nozzle, the disadvantage is that the air flow in the middle of the air flow channel is weak.

Therefore, it is necessary to find a bladeless fan that can effectively strengthen the wind pressure, can entrain more air and has a relatively strong airflow in the middle of the airflow channel.

Contents of the invention

The purpose of the present invention is to provide a bladeless fan which can effectively strengthen the wind pressure, can entrain more air and has a relatively strong airflow in the middle of the airflow channel.

The technical solution of the present invention is: a bladeless fan with a double-angle nozzle, mainly composed of an annular airflow injection device 1, a base 2 and an airflow booster 3; the airflow injection device 1 is located above the base 2, and a The air flow passage; the air flow injection device includes an air collection bin 11, an air passage 12, an outer side wall 13, and an inner side wall 14; the air collection bin 11 is located at the bottom and communicates with the air outlet of the air flow booster device 3 located in the base 2; the base 2 The outer wall is provided with an air inlet, and the air passage 12 is an annular hollow passage located inside the air jet device 1, which is defined by the butt joint of the outer side wall 13 and the inner side wall 14. Pipe 16 and second nozzle 17, spacer block 15 is arranged between the adjacent first nozzle and second nozzle; said first nozzle and second nozzle are arranged in a ring on the inner wall; An included angle of 5-45 degrees is formed between the air-flow blown out by the first nozzle 16 and the air-flow blown out by the second nozzle; Two circles of airflow with different injection angles are formed at the air inlet end of the airflow channel, and the airflow blowing to the airflow circle in the middle of the airflow channel makes the middle part of the airflow channel air intake end form a stronger negative pressure zone, entraining the surrounding air into the middle part of the airflow channel, Increase the airflow in the middle of the airflow channel; another circle of airflow flows along the surface of the inner wall to the air outlet, using the Coanda effect to entrain the air around the airflow channel.

The first nozzle 16 is inclined from the inside of the air channel 12 to the air outlet end of the air flow channel, and a part of the air flow flows along the inner wall 14 to the air outlet end of the air flow channel.

The airflow emitted by the first nozzle 16 is at an angle of 0-30 degrees to the horizontal plane, and the airflow emitted by the second nozzle 17 is at an angle of 15 to 60 degrees with the horizontal plane; The angle between the two nozzles and the horizontal plane is 5-45 degrees larger than the angle between the first nozzle 16 and the horizontal plane.

The inner walls of the first nozzle 16 and the second nozzle 17 are arc-shaped.

The projection of the second nozzle 17 on the plane where the inner sidewall 14 is developed forms an included angle of 5 to 85 degrees with the inlet end surface of the inner sidewall.

A flow guiding device is provided on the edge of the first nozzle 16 inside the air channel 12 .

A guide device is provided on the edge of the second nozzle 17 inside the air channel 12 .

Beneficial effect:

1. The first nozzle and the second nozzle are arranged at intervals on the inner wall of the airflow injection device, and a spacer is provided between the adjacent first nozzle and the second nozzle. Since the area of the air outlet is reduced, the On the premise of other functional parameters being the same, the wind pressure increases accordingly, and a greater negative pressure is formed at the intake end of the airflow channel, which can entrain more air into the airflow channel.

2. The airflow ejected from the first nozzle and the second nozzle forms two circles of airflow with different angles, which can increase the air flow in the middle of the airflow channel.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is the appearance schematic diagram of the present invention;

Fig. 3 is a partial enlarged view of A in Fig. 1;

Fig. 4 is a partially enlarged view of B in Fig. 2 .

Detailed ways

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the bladeless fan with double-angle nozzle is mainly composed of an annular airflow injection device 1, a base 2 and an airflow booster device 3. The airflow injection device 1 is located above the base 2, and the middle thereof defines an airflow channel; the airflow injection device includes an air collection bin 11, an air passage 12, an outer side wall 13, and an inner side wall 14; The air outlet of the inner airflow booster device 3 is connected; the outer wall of the base 2 is provided with air inlet holes, and the air passage 12 is an annular hollow passage located inside the airflow injection device 1, which is defined by the docking of the outer wall 13 and the inner wall 14. When the airflow supercharging device works, the air of the outside world is sucked in from the air inlets arranged on the outer wall of the base, and blown into the air duct 12 after being pressurized.

The first nozzle 16 and the second nozzle 17 are arranged at intervals on the inner side wall 14 of the airflow injection device 1, and a spacer 15 is arranged between the adjacent first nozzle and the second nozzle; The tube and the second nozzle are arranged in a ring on the inner side wall; the airflow blown out by the first nozzle 16 and the airflow blown out by the second nozzle form an included angle of 5-45 degrees. The airflow in the air passage 12 is ejected from the first nozzle and the second nozzle, forming two circles of airflows with different injection angles at the inlet end of the airflow passage, blowing to that circle of airflow in the middle of the airflow passage, making the airflow passage The middle part of the air intake end forms a stronger negative pressure area, entraining the surrounding air into the middle part of the airflow channel, increasing the air flow in the middle part of the airflow channel; another circle of airflow flows along the surface of the inner wall to the air outlet end, using the Coanda effect The air around the airflow channel is entrained; the above two circles of airflow merge and flow to the air outlet end of the airflow channel. Usually, the bladeless fan is provided with only one circle of nozzles and the angle is fixed, resulting in weak airflow in the middle of the airflow channel. Since the present invention forms two circles of airflows with an included angle of 5-45 degrees in the injection direction, it can overcome the defect of weak airflow in the middle of the airflow passage, and the airflow blowing to the user is more uniform.

Since the sum of the cross-sectional areas of the nozzle openings of the first nozzle and the second nozzle is smaller than the area of the continuous annular nozzle, the air pressure of the ejected air flow is larger, can blow farther, and the negative pressure formed is correspondingly larger , It can also suck more air, so as to achieve a better blowing effect.

The first nozzle 16 is inclined from the inside of the air channel 12 to the air outlet end of the air flow channel, and a part of the air flow flows along the inner wall 14 to the air outlet end of the air flow channel.

The airflow emitted by the first nozzle 16 is at an angle of 0-30 degrees to the horizontal plane, and the airflow emitted by the second nozzle 17 is at an angle of 15 to 60 degrees with the horizontal plane; The angle between the two nozzles and the horizontal plane is 5-45 degrees larger than the angle between the first nozzle 16 and the horizontal plane.

The inner walls of the first nozzle 16 and the second nozzle 17 are arc-shaped, so that the airflow in the air passage can flow smoothly to the airflow passage.

The projection of the second nozzle 17 on the plane where the inner sidewall 14 is developed forms an included angle of 5 to 85 degrees with the inlet end surface of the inner sidewall. The airflow ejected from the second nozzle is not directly blown to the air outlet end of the airflow channel, but is blown sideways, forming a vortex-like airflow in the airflow channel.

A guide device is provided on the edge of the first nozzle 16 inside the air channel 12 to guide the air flow into the first nozzle smoothly.

A guide device is provided on the edge of the second nozzle 17 inside the air passage 12 to guide the air flow into the second nozzle smoothly.

On the premise that the power and performance of the airflow supercharging device are the same, because the present invention adopts the design of an independent nozzle with an isolation block in the middle, the actual air outlet area is reduced, thereby increasing the wind pressure and making the airflow spray At the same time, according to the venturi principle, under the condition of strong air jet, the negative pressure at the inlet end of the air flow channel is greater, and more air can be entrained into the air flow channel.

Due to the diffusibility of the air, although there is a distance between the nozzles, the user will not feel that there is a gap between the air streams due to the diffusibility of the air stream.

The above-mentioned embodiments are only used to illustrate and explain the purpose of the present invention, rather than to limit the present invention. Those of ordinary skill in the art may make various changes or substitutions within the essential scope of the present invention, which shall also belong to the present invention. scope of protection for inventions.

Claims (7)

1. The bladeless fan with double-angle nozzle is mainly composed of annular air injection device (1), base (2) and air booster device (3); the air injection device (1) is located above the base (2) , the middle of which defines an airflow channel; the airflow injection device includes an air collection bin (11), an air passage (12), an outer side wall (13), and an inner side wall (14); the air collection bin (11) is located at the bottom, and The air outlet of the airflow booster (3) in (2) communicates; the outer wall of the base (2) is provided with an air inlet, and the air passage (12) is an annular hollow passage positioned at the inside of the airflow injection device (1). The outer wall (13) and the inner wall (14) are butted and defined, and it is characterized in that: the first nozzle (16) and the second nozzle (17) are arranged at intervals on the inner wall (14) of the airflow injection device (1), A spacer (15) is provided between adjacent first nozzles and second nozzles; the first nozzles and second nozzles are arranged in a ring on the inner sidewall; the first nozzles (16) Form the included angle of 5-45 degree between the air-flow that blows out and the air-flow that the second nozzle pipe blows; Two circles of airflow with different injection angles are formed at the end of the airflow channel, and the circle of airflow blowing to the middle of the airflow channel makes the middle part of the air inlet end of the airflow channel form a stronger negative pressure area, entrains the surrounding air into the middle of the airflow channel, and makes the airflow channel The airflow in the middle increases; another circle of airflow flows along the surface of the inner wall to the air outlet, using the Coanda effect to entrain the air around the airflow channel. 2. The bladeless fan with double-angle nozzle according to claim 1, characterized in that: the first nozzle (16) is inclined from the air passage (12) to the air outlet of the air passage, and a part of the air flow is along the The wall surface of the inner side wall (14) flows to the gas outlet end of the air flow channel. 3. The bladeless fan with double-angle nozzle according to claim 2, characterized in that: the airflow ejected from the first nozzle (16) is at an angle of 0-30 degrees with the horizontal plane, and the The air-flow that the second spray pipe (17) sprays and the horizontal plane are the included angle of 15 to 60 degrees; -45 degree. 4. The bladeless fan with double-angle nozzles according to claim 1, characterized in that: the inner walls of the first nozzle (16) and the second nozzle (17) are arc-shaped. 5. The bladeless fan with double-angle nozzle according to claim 1, characterized in that: the projection of the second nozzle (17) on the plane where the inner side wall (14) is developed and the progress of the inner side wall The air end faces form an included angle of 5 to 85 degrees. 6. The bladeless fan with double-angle nozzles according to claim 1, characterized in that: a guide device is provided on the edge of the first nozzle (16) inside the air passage (12). 7. The bladeless fan with double-angle nozzles according to claim 1, characterized in that: a guide device is provided on the edge of the second nozzle (17) inside the air passage (12).