CN111379709A - Blow suction machine - Google Patents

Abstract

The invention relates to an electric tool for environmental care in daily life, in particular to a blower, comprising a volute with an air inlet and an air outlet, an air outlet pipe sealed with the air outlet, and an air duct communicated with the volute , The handle, trigger, motor, power supply assembly and centrifugal fan inside the volute are arranged outside the volute. When the trigger is pulled by the handle, the motor is electrically connected with the power assembly, and drives the centrifugal fan to rotate, and the air passes through the inlet. The tuyere enters the volute and is compressed to the air outlet by the fan. The centrifugal fan is composed of a panel, a bottom plate and several spiral blades. The volute is provided with a sealing rib that is concentric with the panel and has an inner diameter larger than that of the panel. The blower and suction machine of the present invention can greatly reduce the noise and improve the compression efficiency.

Description

Blow suction machine

technical field

The invention relates to an electric tool for environmental care in daily life, in particular to a blower, comprising a volute, a motor, an air outlet pipe and a centrifugal fan.

Background technique

Hair dryer is a necessary power tool for environmental care in daily life, such as blowing away fallen leaves, broken grass and other dust and sundries. Due to the large flow and wind speed required, the machine itself is relatively bulky and noisy. As an improved product of the blower, the blower is a dual-purpose power tool for blowing or sucking in small spaces or large spaces. Generally speaking, for small spaces, in order to avoid secondary pollution of the environment, the method of suction is used to clean up dust and impurities. For large spaces, the suction efficiency is relatively low, so blowing is used.

The existing blowing and suction machine generally includes a volute with an air inlet and an air outlet, a handle connected to the volute, a trigger, a power supply assembly, a motor, an air outlet pipe and a centrifugal fan. The motor is perpendicular to the volute and is located in the volute. The axial center position of the motor, the output shaft of the motor goes deep into the volute, the centrifugal fan is located inside the volute and is installed on the output shaft of the motor, the air outlet pipe is sealed with the air outlet, and the air inlet is located on the opposite side where the motor is installed, and the motor drives The fan rotates, and the air is sucked into the low-pressure area from the air inlet, compressed by the fan to the compression area, and then thrown to the high-pressure area of the air duct. When using the low pressure area to clean the environment, it is the suction fan; when using the high pressure area to clean the environment, it is the blower.

However, the existing blower and suction machine has the defects of high noise and low compression efficiency; the noise will seriously damage the user's health and experience, and the low efficiency will affect the continuous working time of the product and increase the waste of materials.

Moreover, the existing products can only focus on the convenience of use and operation comfort in one state; generally, they focus on the convenience of use and operational experience in the blowing state; and as a suction fan, the operation is very inconvenient.

For air blowers, high noise and low compression efficiency are stubborn problems in the industry. How to achieve high-efficiency compression, low noise, and easy operation and use in blowing and suction states are the goals that the industry is constantly pursuing.

SUMMARY OF THE INVENTION

One of the technical problems to be solved by the present invention is to provide a blower and suction machine with reduced noise and improved compression efficiency.

The idea of the present invention is to first analyze the origin of the noise, and find out that the key factor affecting the noise level is the shock wave and turbulence caused by the shock wave and the turbulent flow caused by the collision of the airflow and the object during the high-speed relative motion. Secondly, the principle of reducing efficiency is analyzed. There are three areas for centrifugal fans: the fan intake area is the low-pressure area B, the compression area D between the blades, and the discharge high-pressure area A outside the blades; if the high-pressure area A and the low-pressure area B and The compression area D is not well sealed, and the airflow in the high pressure area A flows back to the low pressure area B and the compression area D under the action of pressure, which greatly reduces the compression efficiency of the fan.

The technical scheme for solving the above-mentioned technical problems is: a blowing and suction machine, comprising a volute with an air inlet and an air outlet, an air outlet pipe sealed with the air outlet, an air duct communicated with the volute, and a volute arranged outside the volute. The handle, trigger, motor, power supply assembly and centrifugal fan in the volute. When the trigger is pulled by the handle, the motor is electrically connected to the power supply assembly and drives the centrifugal fan to rotate. The air enters the volute through the air inlet and is The fan is compressed to the air outlet pipe, and is characterized in that: the centrifugal fan is composed of a panel, a bottom plate and several helical blades, and the inside of the volute is provided with a sealing rib that is concentric with the panel and has an inner diameter larger than that of the panel.

The panel is an umbrella-shaped curved panel with a circular hole in the center.

The blowing-suction machine also includes a plurality of deflectors, which extend from the inside of the air outlet pipe to the volute, and are used for leading out and dividing the high-pressure rotating air in the volute into several mutually isolated air ducts.

The air duct is connected to the air outlet pipe, and the air outlet end of the air duct is provided with a flow multiplier assembly. The flow multiplier assembly is composed of an accelerating nozzle, an air guide plate and a flow increasing pipe. The accelerating nozzle is located in the drainage pipe, and the wind deflector is located between the accelerating nozzle and the increasing flow pipe, and is distributed circumferentially.

The air duct is connected to the air inlet, and the air outlet pipe is connected to the dust collector. The dust collector includes an air inlet duct, an air exhaust duct, a dust collecting bin, a cyclone, and an air-dust separator. The dust collecting bin is a fixed seal at one end, One end of the barrel container can be opened movably. The air inlet end of the air inlet tube is connected to the air outlet pipe, and the other end is tangent to the cyclone tube. The cyclone tube is a cylindrical thin-walled tube, and the gas dust separator is a conical tube. Cyclone tube, the small mouth end is suspended, the exhaust tube is a circular tube coaxial with the cyclone tube, one end goes out through the dust collection bin and communicates with the atmosphere, and the other end goes deep into the gas dust separator, but does not exceed the small mouth of the gas dust separator. end.

The handle is a handle with an arc shape at the top and is installed vertically on the surface of the volute. The axis of the air outlet pipe is located in the plane of the handle, and the trigger is located inside the handle.

Another technical solution for solving the above technical problems is: a blowing and suction machine, comprising a volute with an air inlet and an air outlet, an air outlet pipe sealed with the air outlet, a motor outside the volute, a handle, a trigger, a power supply The fan in the assembly and the volute, when the handle is pulled and the trigger is pulled, the motor is electrically connected to the power source assembly, and drives the fan to rotate, and the air enters the volute through the air inlet and is compressed to the air outlet by the fan, which is characterized by: The blowing-suction machine also includes a plurality of deflectors, which extend from the inside of the air outlet pipe to the volute, and are used for leading out and dividing the high-pressure rotating air in the volute into several mutually isolated air ducts.

Each deflector is composed of a combination of a plane parallel to the axis of the air outlet pipe and an arc-shaped curved surface corresponding to the rotation direction of the air in the volute.

The air outlet pipe is provided with three guide plates.

Another technical problem to be solved by the present invention is to provide a blower and suction machine with convenient operation.

The technical solution is: a blowing and suction machine, comprising a volute with an air inlet and an air outlet, an air outlet pipe sealed with the air outlet, a motor outside the volute, a handle, a trigger, a power supply assembly and a fan inside the volute , when the handle is pulled and the trigger is pulled, the motor is electrically connected to the power supply assembly, and drives the fan to rotate, and the air enters the volute through the air inlet and is compressed to the air outlet by the fan, which is characterized in that: the handle is a top The arc-shaped handle is vertically installed on the surface of the volute, the axis of the air outlet pipe is located in the plane of the handle, and the trigger is located inside the handle.

The top of the handle is an inverted U shape.

The power supply assembly is on the handle and on the leg away from the position of the air outlet.

The beneficial technical effects of the present invention are as follows: 1. The fan is composed of a panel, a bottom plate and a plurality of fan blades, and sealing ribs are designed. The fan rotates together to reduce the friction area with the volute, which also reduces the airflow oscillation caused by the eddy current, thereby reducing noise. On the other hand, the sealing rib divides the volute into a low pressure area B, a compression area D, a high pressure area A and a sealing area C. The sealing rib isolates the high-pressure area A and the sealing area C, which reduces the backflow of the high-pressure airflow, that is, reduces the pressure loss in the high-pressure area A, thereby improving the compression efficiency.

2. The deflector divides the imported airflow into a single relatively independent area to avoid mutual movement; the deflector will export and isolate the airflow continuously thrown from the fan at high speed in time to reduce the generation of turbulence, thereby reducing noise and improving compression efficiency.

3. The shape of the handle of the present invention and the design of the relative position of the air outlet pipe and the trigger are based on the principle of ergonomics, fully consider the convenience of manual operation, and are simple and convenient to use.

Description of drawings

FIG. 1 is a cross-sectional view of the main structure of the blower and suction machine of the present invention.

FIG. 2 is a view taken along the line A-A of FIG. 1 .

FIG. 3 is a B-B cross-sectional view of FIG. 1 .

FIG. 4 is a schematic diagram of the flow multiplication of the blower and suction machine of the present invention in a blowing state.

Figure 5 is a cross-sectional view of the flow multiplier.

FIG. 6 is a left side view of FIG. 5 .

FIG. 7 is a schematic structural diagram of the blower suction machine of the present invention in a dust-absorbing state.

FIG. 8 is a cross-sectional view of the dust collector in FIG. 7 .

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 8 .

Fig. 10 is a schematic view of the operation of the blower suction machine of the present invention in a blowing state.

Fig. 11 is a schematic diagram of the operation of the blower suction machine of the present invention in the state of suction and dust removal.

1-trigger 2-handle 3-motor 4-fan 5-air inlet 6-air outlet 7-volute 8-sealing rib 9-power assembly 10-deflector 401-fan blade 402-panel 403-bottom plate;

11-Air duct 12-Flow multiplier;

121-accelerating nozzle 122-air deflector 124-increasing flow pipe 125-air outlet;

13-Dust collector 131-Air inlet duct 132-Air exhaust duct 133-Dust bin 134-Cyclone duct 135-Exhaust filter 136-Dust discharge cover 137-Button 138-Rotary shaft 139-Air dust separator

Detailed ways

The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 3 , the main engine of the blowing and suction machine of the present invention is composed of a trigger 1, a handle 2, a motor 3, a fan 4, a volute 7, an air inlet 5, an air outlet 6 and a power supply assembly 9; the power supply assembly 9 can be It is a battery pack, it can also be an AC socket or a power cord; the motor 3 is vertically installed in the volute 7 and is located at the axial position of the volute 7; the motor output shaft passes through the volute 7 and goes deep into the volute 7.

The fan 4 is installed on the motor output shaft. The fan 4 is composed of a panel 402, a plurality of blades 401 and a bottom plate 403; the bottom plate 403 is a circular plane; between the leaves.

Preferably, the panel 402 is an umbrella-shaped curved panel with a hole in the center.

The volute 7 has an air inlet 5 and an air outlet 6 connected with the air outlet (not shown in the figure); the air inlet 5 is coaxial with the axis of the volute 7 and is located on the opposite surface where the motor 3 is installed; the air outlet 6 It is perpendicular to the axis of the volute 7 and is sealingly connected to the volute 7; the volute 7 has a sealing rib 8 in the same circle as the fan 4 and whose inner diameter is slightly larger than the diameter of the panel 402.

Inside the air outlet pipe 6, at least two deflectors 10 are provided. The deflector 10 is composed of a combination of a plane parallel to the axis of the air outlet duct 6 and a circular arc surface, and the circular arc surface is close to the fan 4 .

In order to improve the compression efficiency of the hair dryer and reduce the noise, it is necessary to first analyze the origin of the noise and the principle of reducing the efficiency; the noise is generated by the shock wave and turbulent flow caused by the shock of the airflow during the high-speed relative motion of the airflow and the object; For any centrifugal fan, there are three areas according to the air pressure state: the fan intake area is the low pressure area B, the compression area D between the blades, and the discharge high pressure area A outside the blades; if the high pressure area A and the low pressure area B and the compression area D is not well sealed, and the airflow in the high pressure area A flows to the low pressure area B and the compression area D under the action of pressure, which greatly reduces the compression efficiency of the fan 4 .

In view of this, the solution of the present invention to improve efficiency and reduce noise is as follows:

1. The double-sided fan 4 is adopted. The fan 4 is composed of a panel 402, a bottom plate 403 and a plurality of fan blades 401. At the same time, a sealing rib 8 is added to divide the volute 7 into a low-pressure area B, a compression area D, a high-pressure area A and a sealing rib 8. Zone C; the airflow is cut into the compression zone D by the fan blade 401 in the low pressure zone B, and is compressed under the drive of the fan blade 401; the compressed airflow is thrown into the high pressure zone A by the fan blade 401 at a high speed. On the one hand, the sealing rib 8 isolates the high-pressure area A and the sealing area C, which reduces the backflow of the high-pressure airflow, that is, reduces the pressure loss in the high-pressure area A, thereby improving the compression efficiency; on the other hand, during the compression process of the airflow, It is limited to the space formed by the bottom plate 403, the fan blades 401 and the panel 402 and rotates together with the fan 4 to reduce the frictional area with the volute, thus reducing the eddy current, thereby reducing noise.

2. The deflector 10 extends to the inside of the volute, and is bent into a circular arc surface to separate the introduced airflow into a single relatively independent area to avoid mutual movement; Export and isolation, reducing the generation of turbulence; thereby reducing noise and improving compression efficiency.

Since this type of centrifugal blower has the characteristics of high wind speed and small flow, the present invention provides a solution with high wind speed and large flow. As shown in Figure 4: the air duct 11 is installed on the air outlet 6 of the blower to form a blower; when a large flow is required, the flow multiplier assembly 12 is installed on the air outlet end of the air duct 11 to increase the The air flow and blowing width of the hair dryer.

The flow multiplier assembly 12 is a component used for the drainage effect of high-speed jets to increase the flow of the blower according to the principle of the venturi; 124; the accelerating nozzle 121 is a tapered pipe with a diameter that gradually converges, and the air flow is accelerated in the accelerating nozzle 121; the accelerating nozzle 121 is completely located in the increasing flow pipe 124; in order to improve the efficiency of the increasing Some tuyere openings 125 may be opened on the outer wall of the pipe 124; the wind deflector 122 is located between the accelerating nozzle 121 and the flow increasing pipe 124, and is distributed circumferentially.

In this way, the area A1 in the air duct 11, the area B1 in the accelerating nozzle 121, the area C1 between the outer wall of the accelerating nozzle 121 and the inner wall of the increasing pipe 124, and the area D1 in the increasing pipe 124 are four areas: the gas in the area A1 Speed V, the mass per unit time is M; accelerate in the B1 area, and the maximum is Va at the outlet of the accelerating nozzle 121; according to the Venturi effect, C1 is a negative pressure area and is connected to the atmosphere, and the negative pressure sucks air; The air mass is Mi and the initial velocity is 0; the two airflows are mixed in D1;

According to the principle of kinetic energy conservation: kinetic energy Qa=V×M before drainage; kinetic energy Qi=Vo×(Mi+M) after drainage and mixed flow; Vo is the airflow velocity after mixed flow. Qa=Qi; V×M=Vo×(Mi+M); in this way, the high wind speed and low flow conversion of the centrifugal fan is realized, which is called an axial flow fan with medium wind speed and large flow.

The present invention also provides a suction fan, as shown in FIG. 7 : the suction fan consists of a handle 1, a trigger 2, a motor 3, a fan 4, a volute 7, an air outlet 6, an air duct 11, a dust collector 13 and a power supply assembly 9 composition; realize the conversion of the blower and the suction fan; the dust collector 13 is connected to the air outlet 6, and the power supply assembly 9 is connected to a leg position close to the handle 1 away from the dust collector.

As shown in FIG. 8 , the dust collector 13 is composed of an air inlet duct 131, an air exhaust duct 132, a dust collecting bin 133, a cyclone duct 134, an air exhaust filter 135, a dust discharge cover 136, a button 137, a rotating shaft 138, and an air and dust separator. 139; the dust collecting bin 133 is a barrel container with one end fixed and sealed, and one end can be movably opened; the dust discharge cover 136 is fixed by the button 137, the rotating shaft 138 and the movable end of the dust collecting bin 133, which can be opened and sealed; The air inlet end of the tube 131 is connected to the air outlet duct 6, and the other end is tangent to the cyclone tube 134; the air-dust mixed airflow discharged from the air outlet tube 6 is turned and accelerated in the air inlet tube 131; the cyclone tube 134 is a cylindrical thin tube. The wall tube, the air-dust mixed airflow discharged from the air inlet tube 131 rotates in it to realize air-dust stratification: the dust with a large specific gravity has a large centrifugal force and rotates along the inner wall of the cyclone tube 134; the air with a small specific gravity has a small centrifugal force and is close to The center range of the cyclone 134 rotates;

The air-dust separator 139 is a conical tube, one end is connected to the cyclone 134, and the small mouth end is suspended; the exhaust duct 132 is a circular tube coaxial with the cyclone 134, one end goes out through the dust collecting bin 133 and communicates with the atmosphere; into the air-dust separator 139, but not beyond the small port end of the air-dust separator 139; the exhaust filter 135 is a porous filter with one end fixed on the exhaust duct 132, which can further filter some light fine dust. separation.

The gas-dust mixed airflow rotates along the inner wall of the cyclone 134, and the speed of the gas-dust separator 139 is further accelerated, the centrifugal force is larger, and the gas-dust stratification effect is more obvious; into the dust collection bin 133; according to the Venturi effect, the air pressure in the dust collection chamber 133 is much lower than the air pressure of the air-dust separator 139, and the thrown dust and other heavy substances will not flow to the exhaust duct 132; close to the center position The light gas is discharged through the exhaust duct 132 .

It can be seen from the above analysis that this vacuum cleaner can efficiently remove dust and prevent secondary pollution.

In the existing blower and suction machine, because the design of the shape of the handle and the position of the trigger is not taken into consideration, the machine cannot be operated conveniently no matter in the state of the blower or the state of the suction blower. The present invention has made an improved design for this. Referring to Figures 10 to 11, the handle 1 is a top arc-shaped, inverted U-shaped handle, and is perpendicular to the plane of the volute 7; the axis of the air outlet pipe is located in the plane of the handle; the trigger 2 is located on the inside of the handle, and is used to control the start and stop of the motor 3; in the blowing state, hold the handle, the blower is facing the sundries to be blown, and operate the trigger to realize the simple and convenient operation of the blower; in the vacuuming state, hand Holding the handle, the air duct is facing the sundries to be sucked, and operating the trigger, the simple and convenient operation of the suction and dust collector can be realized. So as to ensure the convenience of man-machine operation.

Professionals should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the specific working principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various Such changes and improvements fall within the scope of the claimed invention, which is defined by the appended claims and their equivalents.

Claims (12)

1. The utility model provides a blowing and sucking machine, including the spiral case that has air intake and air outlet, with air outlet sealing connection's play tuber pipe, with the dryer of spiral case intercommunication, locate the centrifugal fan in outer handle, trigger, motor, power supply module and the spiral case of spiral case, when holding the handle trigger of pulling, motor and power supply module electricity intercommunication to it is rotatory to drive centrifugal fan, in the air gets into the spiral case through the air intake, by fan compression to play tuber pipe, characterized by: the centrifugal fan is composed of a panel, a bottom plate and a plurality of spiral blades, and sealing ribs which are concentric with the panel and have the inner diameter larger than the diameter of the panel are arranged in the volute.

2. The suction blower of claim 1 further comprising: the panel is an umbrella-shaped curved plate with a round hole in the center.

3. The suction blower of claim 1 further comprising: the blowing and sucking machine also comprises a plurality of guide plates, and the guide plates extend into the volute from the inside of the air outlet pipe and are used for guiding out and dividing the high-pressure rotary air in the volute into a plurality of mutually isolated air channels.

4. The suction blower of claim 1 further comprising: the air duct is connected with the air outlet pipe, the air outlet end of the air duct is provided with a flow multiplication assembly, the flow multiplication assembly is composed of an accelerating spray pipe, an air deflector and a flow increasing pipe, the accelerating spray pipe is a conical pipe with gradually converging diameter, the accelerating spray pipe is positioned in the drainage pipe, and the air deflector is positioned between the accelerating spray pipe and the flow increasing pipe and is circumferentially distributed.

5. The suction blower of claim 1 further comprising: the air duct is connected with the air inlet, the air outlet pipe is connected with the dust remover, the dust remover comprises an air inlet barrel, an air exhaust barrel, a dust collection bin, a cyclone barrel and a gas-dust separator, the dust collection bin is a barrel-shaped container with one end fixedly sealed and the other end movably opened, the air inlet end of the air inlet barrel is connected with the air outlet pipe, the other end of the air inlet barrel is tangent to the cyclone barrel, the cyclone barrel is a cylindrical thin-wall barrel, the gas-dust separator is a section of conical pipe, one end of the gas-dust separator is connected with the cyclone barrel, the small-opening end of the gas-dust separator is suspended, the air exhaust barrel is a section of circular pipe coaxial with the cyclone barrel, one end of the air exhaust barrel penetrates through the dust.

6. The suction blower according to any one of claims 1 to 5, wherein: the handle is a handle with an arc-shaped top and is vertically arranged on the surface of the volute, the axis of the air outlet pipe is positioned in the plane of the handle, and the trigger is positioned on the inner side of the handle.

7. The utility model provides a blowing and sucking machine, including the spiral case that has air intake and air outlet, with air outlet sealing connection's the outer motor of play tuber pipe, spiral case, handle, trigger, power supply module and the fan in the spiral case, when holding the handle and withholding the trigger, motor and power supply module electricity intercommunication to it is rotatory to drive the fan, in the air gets into the spiral case through the air intake, by the fan compression to play tuber pipe, characterized by: the blowing and sucking machine also comprises a plurality of guide plates, and the guide plates extend into the volute from the inside of the air outlet pipe and are used for guiding out and dividing the high-pressure rotary air in the volute into a plurality of mutually isolated air channels.

8. The suction blower of claim 7 wherein: each guide plate is formed by combining a section of plane parallel to the axis of the air outlet pipe and a section of arc-shaped curved surface corresponding to the rotation direction of the air in the volute.

9. The suction blower of claim 8 wherein: three guide plates are arranged in the air outlet pipe.

10. The utility model provides a blowing and sucking machine, including the spiral case that has air intake and air outlet, with air outlet sealing connection's the fan in the outer motor of play tuber pipe, spiral case, handle, trigger, power supply module and spiral case, when holding the handle and withholding the trigger, motor and power supply module electricity intercommunication to it is rotatory to drive the fan, in the air gets into the spiral case through the air intake, by the fan compression to play tuber pipe, characterized by: the handle is a handle with an arc-shaped top and is vertically arranged on the surface of the volute, the axis of the air outlet pipe is positioned in the plane of the handle, and the trigger is positioned on the inner side of the handle.

11. The suction blower of claim 10 further characterized by: the top of the handle is in an inverted U shape.

12. The suction blower of claim 10 further characterized by: the power supply assembly is arranged on the handle and on the leg far away from the air outlet pipe.

Images