CN212337733U

CN212337733U - Blowing and sucking machine

Info

Publication number: CN212337733U
Application number: CN202020541258.3U
Authority: CN
Inventors: 田璐璐
Original assignee: Ningbo Cheery Garden Tools Co ltd
Current assignee: Ningbo Cheery Garden Tools Co ltd
Priority date: 2020-04-11
Filing date: 2020-04-11
Publication date: 2021-01-12
Anticipated expiration: 2030-04-11
Also published as: CN212003688U; CN212225543U

Abstract

The utility model relates to an electric tool of environmental care in daily life especially relates to 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 outer handle of spiral case, trigger, motor, the centrifugal fan in power supply module and the spiral case, when holding the handle and withhold the trigger, motor and power supply module electricity intercommunication to it is rotatory to drive centrifugal fan, the air is through getting into the spiral case by the air intake in, 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. The utility model discloses a suction blower can make noise greatly reduced and make compression efficiency improve.

Description

Blowing and sucking machine

This application is a divisional application entitled "suction and blowing machine" filed No. 202020524817X, 2020, 4, 11.

Technical Field

The utility model relates to an electric tool of environmental care in daily life especially relates to a blowing and sucking machine, including spiral case, motor, play tuber pipe and centrifugal fan.

Background

The blower is an electric tool which is necessary for environmental care in daily life, and is used for blowing off outdoor fallen leaves, grass and other dust and sundries; because of the requirement of larger flow and wind speed, the volume and noise of the machine are larger. As an improved product of a hair drier, a blowing and sucking machine is a blowing or sucking dual-purpose electric tool used in a narrow space or a large space, and generally, for the narrow space, in order to avoid secondary environmental pollution, dust and impurities are cleaned in a sucking mode; for large spaces, the suction efficiency is low, and a blowing mode is adopted.

The existing blowing and sucking machine generally comprises a volute with an air inlet and an air outlet, a handle, a trigger, a power supply assembly, a motor, an air outlet pipe and a centrifugal fan, wherein the handle, the trigger, the power supply assembly, the motor, the air outlet pipe and the centrifugal fan are connected with the volute, the motor is perpendicular to the volute and is positioned at the axis position of the volute, the motor output shaft extends into the volute, the centrifugal fan is positioned inside the volute and is installed on the motor output shaft, the air outlet pipe is hermetically connected with the air outlet, the air inlet is positioned on the opposite surface where the motor is installed, the motor drives the fan to rotate, air is sucked into a low-pressure. When the low-pressure area is used for cleaning the environment, the environment is a suction fan; when a high pressure area is used to clean the environment, it is a blower.

However, the existing blowing and sucking machine has the defects of high noise and low compression efficiency; the noise can seriously harm the health and experience of the user, and the low efficiency can influence the continuous working time of the product and increase the waste of materials.

Moreover, the existing products only can bias the use convenience and the operation comfort in one state; generally, the use convenience and the operation experience feeling of a heavy blowing state are realized; and as the state of the suction fan, the operation is very inconvenient.

For a blowing and sucking machine, the problems of high noise and low compression efficiency are the hard problems of the industry, and how to achieve high-efficiency compression and low noise and realize blowing and sucking states, the operation and the use are very convenient and fast, and the aim of continuous pursuit in the industry is achieved.

Disclosure of Invention

One of the to-be-solved technical problems of the utility model is to provide a blowing and sucking machine that noise reduces and compression efficiency promotes.

The utility model discloses an idea is, at first the genesis of analysis noise, finds the key factor that influences the noise height and is that the air current is in the high-speed relative motion process of object, and the shock wave is produced to the postimpact and the turbulent current arouses the air current to vibrate and produce. Secondly, analyzing the principle of efficiency reduction, the centrifugal fan has three areas: the fan air inlet area is a low-pressure area B, a compression area D between the blades and a 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 are not well sealed, the air flow of the high pressure area a flows back to the low pressure area B and the compression area D under the pressure, and the compression efficiency of the fan is greatly reduced.

The technical scheme for solving the technical problems is as follows: 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.

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

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.

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.

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.

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.

Another technical solution for solving the above technical problems is: 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. 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.

Three guide plates are arranged in the air outlet pipe.

The to-be-solved technical problem of the utility model also provides a simple operation's pressure-vaccum machine.

The technical scheme is as follows: 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.

The top of the handle is in an inverted U shape.

The power supply assembly is arranged on the handle and on the leg far away from the air outlet pipe.

The utility model has the beneficial technical effects that: the fan comprises a panel, a bottom plate and a plurality of fan blades, and sealing ribs are designed, so that on one hand, airflow is limited in a space formed by the bottom plate, the fan blades and the panel and rotates together with the fan in the compression process, the friction area with a volute is reduced, the airflow generated by vortex is reduced to vibrate, and the noise is reduced. On the other hand, the sealing ribs divide the volute into a low pressure region B, a compression region D, a high pressure region a and a sealing region C. The sealing rib separates the high-pressure area A from the sealing area C, so that the backflow of high-pressure airflow is reduced, namely, the pressure loss of the high-pressure area A is reduced, and the compression efficiency is improved.

The guide plate divides the introduced air flow into single relatively independent areas to avoid mutual movement; the guide plate can timely guide and isolate the air flow continuously thrown out from the fan at high speed, and reduce the generation of turbulent flow, thereby reducing noise and improving compression efficiency.

Thirdly, the utility model discloses a handle shape and the design of relative play tuber pipe position and trigger relative position thereof, based on ergonomic's principle, fully considered manual operation's facility, it is succinct convenient to use.

Drawings

Fig. 1 is a sectional view of the main machine structure of the blowing and sucking machine of the present invention.

Fig. 2 is a view from a-a of fig. 1.

Fig. 3 is a sectional view taken along line B-B of fig. 1.

Fig. 4 the utility model discloses a blowing and sucking machine realizes the flow multiplication schematic diagram at the state of blowing.

FIG. 5 is a cross-sectional view of a flow multiplier.

Fig. 6 is a left side view of fig. 5.

Fig. 7 is a schematic view of the structure of the blowing and sucking machine of the present invention in a dust-absorbing state.

Fig. 8 is a sectional view of the precipitator of fig. 7.

Fig. 9 is a sectional view B-B of fig. 8.

Fig. 10 is an operation schematic diagram of the blowing and sucking machine of the present invention in a blowing state.

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

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

11-an air duct 12-a flow multiplier;

121-accelerating spray pipe 122-air deflector 124-flow increasing pipe 125-air port;

13-dust remover 131-air inlet drum 132-air exhaust drum 133-dust collection bin 134-cyclone drum 135-air exhaust filter 136-dust exhaust cover 137-button 138-rotating shaft 139-air dust separator

Detailed Description

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

Referring to fig. 1 to 3, the main machine of the blowing and sucking 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 pipe 6 and a power supply assembly 9; the power supply component 9 can be a battery pack, an AC socket or a power cord; the motor 3 is vertically arranged on the volute 7 and is positioned at the axis position of the volute 7; the output shaft of the motor penetrates through the volute 7 and extends into the volute 7.

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

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

The volute 7 is provided with an air inlet 5 and an air outlet pipe 6 connected with an air outlet (not shown); the air inlet 5 is coaxial with the axis of the volute 7 and is positioned on the opposite surface of the installation motor 3; the air outlet pipe 6 is vertical to the axis of the volute 7 and is connected with the volute 7 in a sealing way; the inside of the volute 7 is provided with a sealing rib 8 which is concentric with the fan 4 and has an inner diameter slightly larger than the diameter of the panel 402.

Inside the air outlet pipe 6, at least 2 guide plates 10 are arranged. The guide plate 10 is formed by combining a section of plane parallel to the axis of the air outlet pipe 6 and a section of arc-shaped surface, and the arc-shaped surface is close to the fan 4.

In order to improve the compression efficiency of the hair dryer and reduce noise, the origin of the noise and the principle of causing the efficiency reduction are first analyzed; the noise is generated by shock waves and turbulence generated after the collision of the airflow and an object in the process of high-speed relative motion to cause the airflow to vibrate; any centrifugal fan, depending on the air pressure conditions, has three zones: the fan air inlet area is a low-pressure area B, a compression area D between the blades and a 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 are not well sealed, the air flow of the high pressure area a flows to the low pressure area B and the compression area D under pressure, which greatly reduces the compression efficiency of the fan 4.

In view of this, the utility model discloses the solution of raise efficiency, noise reduction as follows:

firstly, a 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, meanwhile, sealing ribs 8 are added, and the interior of a volute 7 is divided into a low-pressure area B, a compression area D, a high-pressure area A and a sealing area C; the airflow is cut into a compression area D by the fan blade 401 in the low-pressure area B and is compressed under the driving of the fan blade 401; the compressed airflow is thrown into the high-pressure area a by the fan blade 401 at a high speed. On one hand, the sealing rib 8 separates the high-pressure area A from the sealing area C, so that the backflow of high-pressure airflow is reduced, namely, the pressure loss of the high-pressure area A is reduced, and the compression efficiency is improved; on the other hand, during the compression process, the airflow is limited in the space formed by the bottom plate 403, the fan blade 401 and the panel 402 and rotates together with the fan 4, so that the area of friction with the volute is reduced, the vortex is reduced, and the noise is reduced.

Secondly, the guide plate 10 extends into the volute and is bent into an arc surface to divide the introduced air flow into single relatively independent areas so as to avoid mutual movement; the guide plate 10 guides and isolates the airflow continuously thrown out from the fan 4 at high speed in time, so that the generation of turbulent flow is reduced; thereby reducing noise and improving compression efficiency.

Because this kind of centrifugal hair-dryer, there is the characteristics that the wind speed is high, the flow is little, the utility model provides a high wind speed and large-traffic solution. As shown in fig. 4: the air duct 11 is arranged on an air outlet pipe 6 of the blowing and sucking machine to form a blower; when a large flow is needed, the flow multiplication assembly 12 is installed at the air outlet end of the air duct 11 to increase the air outlet flow and the air blowing width of the blower.

The flow multiplier assembly 12 is an assembly for increasing the blower flow by the flow inducing effect of the high velocity jet according to the venturi principle; as shown in fig. 5 to 6: consists of an accelerating jet pipe 121, an air deflector 122 and a flow increasing pipe 124; the accelerating nozzle 121 is a tapered tube whose diameter is gradually converged, and the air flow is accelerated in the accelerating nozzle 121; the acceleration nozzle 121 is located entirely within the boost tube 124; in order to improve the efficiency of the flow increasing pipe 124, a plurality of air ports 125 can be arranged on the outer wall of the flow increasing pipe 124; the air deflectors 122 are located between the accelerating jet 121 and the flow increasing pipe 124 and are circumferentially distributed.

Thus, the area a1 in the air duct 11, the area B1 in the acceleration nozzle 121, the area C1 between the outer wall of the acceleration nozzle 121 and the inner wall of the flow increasing pipe 124, and the area D1 in the flow increasing pipe 124 are four areas: the gas velocity V in the area A1 is M, the mass in unit time is M, the acceleration is carried out in the area B1, and the maximum value at the outlet of the acceleration spray pipe 121 is Va; according to the venturi effect, C1 is a negative pressure region and communicates with the atmosphere, and the negative pressure sucks in air; the mass of the air sucked is Mi, and the initial speed is 0; the two gas streams are mixed in D1;

according to the principle of conservation of kinetic energy: kinetic energy Qa = V × M before drainage; drainage and post-mixing kinetic energy Qi = Vox (Mi + M); vo is the air flow speed after the mixed flow. Qa = Qi; v × M = Vo × (Mi + M); therefore, the characteristic that the centrifugal fan is called as an axial flow fan with medium wind speed and large flow rate by switching high wind speed and low flow rate is realized.

The utility model 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 pipe 6, an air duct 11, a dust remover 13 and a power supply assembly 9; the conversion between the blower and the suction fan is realized; the dust remover 13 is connected on the air outlet pipe 6, and the power supply assembly 9 is connected at a leg position which is close to the handle 1 and far away from the dust remover.

As shown in fig. 8, the dust collector 13 is composed of an air inlet drum 131, an air discharge drum 132, a dust collecting bin 133, a cyclone drum 134, an air discharge filter 135, a dust discharge cover 136, a button 137, a rotating shaft 138 and a gas-dust separator 139; the dust collecting bin 133 is a barrel container with one end fixedly sealed and the other end movably opened; the dust exhaust cover 136 is fixed through the button 137, the rotating shaft 138 and the movable end of the dust collection bin 133, so that the opening and the sealing can be realized; the air inlet end of the air inlet cylinder 131 is connected with the air outlet pipe 6, and the other end of the air inlet cylinder is tangent to the cyclone cylinder 134; the dust mixed airflow discharged from the air outlet pipe 6 realizes turning and acceleration in the air inlet cylinder 131; the cyclone 134 is a cylindrical thin-wall cylinder, and the dust mixed airflow discharged from the air inlet cylinder 131 rotates on the surface of the cylinder to realize air-dust layering: the dust having a large specific gravity has a large centrifugal force and rotates along the inner wall of the cyclone 134; the air having a small specific gravity has a small centrifugal force and rotates in a range near the center of the cyclone 134.

The gas-dust separator 139 is a section of conical pipe, one end of which is connected with the cyclone 134 and the small end of which is suspended; the exhaust barrel 132 is a section of circular tube coaxial with the cyclone barrel 134, and one end of the exhaust barrel passes through the dust collecting bin 133 to be communicated with the atmosphere; one end extends into the gas-dust separator 139 but does not extend beyond the small end of the gas-dust separator 139; the exhaust filter 135 is a porous filter having one end fixed to the exhaust duct 132, and can further separate some light fine dusts.

The gas-dust mixed airflow rotates along the inner wall of the cyclone drum 134, the speed of the gas-dust separator 139 is further accelerated, the centrifugal force is higher, and the gas-dust layering effect is more obvious; the small end of the gas-dust separator 139 is thrown out at high speed and falls into the dust collection bin 133; according to the venturi effect, the air pressure in the dust collecting bin 133 is much lower than that of the air-dust separator 139, so that the heavy substances such as the thrown dust and the like do not flow to the exhaust duct 132; the light gas near the center is discharged through the exhaust duct 132.

From the above analysis, it can be seen that the dust collector can remove dust efficiently and prevent secondary pollution.

The existing blowing and suction machine can not be operated conveniently in a blower state or a suction fan state due to the fact that the design of the shape of a handle and the position of a trigger are not considered. The utility model is improved, referring to fig. 10-11, the handle 1 is an arc-shaped handle with an inverted U-shaped top, and is perpendicular to the plane of the volute 7; the axis of the air outlet pipe is positioned in the plane of the lifting handle; the trigger 2 is positioned at the inner side of the lifting handle and is used for controlling the starting and stopping of the motor 3; in the blowing state, the handle is held by hand, the air duct faces towards the blown sundries, and the trigger is operated, so that the blower can be operated simply and conveniently; in the dust absorption state, the handle is held by hand, the air duct faces to the absorbed sundries, and the trigger is operated, so that the simple and convenient operation of the air suction dust remover can be realized. Thereby ensuring the convenience of man-machine operation.

It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only illustrative of the specific working principle of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, which fall within the scope of the present invention as claimed, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

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 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.

2. The suction blower of claim 1 further comprising: 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.

3. The suction blower of claim 2 further characterized by: three guide plates are arranged in the air outlet pipe.