CN111336116A - Blowing and suction fan - Google Patents
Blowing and suction fan Download PDFInfo
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- CN111336116A CN111336116A CN201811552538.8A CN201811552538A CN111336116A CN 111336116 A CN111336116 A CN 111336116A CN 201811552538 A CN201811552538 A CN 201811552538A CN 111336116 A CN111336116 A CN 111336116A
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- diffuser
- blowing
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- 238000007664 blowing Methods 0.000 title claims abstract description 69
- 230000007423 decrease Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 230000005540 biological transmission Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 210000001015 abdomen Anatomy 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
Abstract
The invention relates to a blowing and sucking fan, which comprises: the air conditioner comprises a shell, wherein an air inlet and an air outlet which are communicated with the outside are formed in the shell; the fan is arranged in the shell and used for generating air flow; the fan is an axial flow fan, the axial flow fan comprises a motor and an axial flow fan, and the motor and the axial flow fan are arranged in the same axial direction; the shell comprises a main body part and a blowpipe connected with the main body part, the blowpipe comprises a main blowpipe and a flow expansion pipe connected with the main blowpipe, the main blowpipe is connected with the main body part, the main blowpipe is provided with a connecting part, one side of the flow expansion pipe is connected with the connecting part, the other side of the flow expansion pipe is an air outlet, and the diameter of the flow expansion pipe is larger than that of the connecting part. The blowing and suction fan adopts the axial flow fan to generate high-speed airflow, and realizes the effects of flow expansion and speed increase of the airflow through the blowing pipe, thereby greatly improving the fan efficiency of the blowing and suction fan.
Description
Technical Field
The invention relates to a blowing and sucking fan, and belongs to the field of electric tools.
Background
The blowing and sucking fan is widely applied to daily life as a tool for cleaning the ground such as gardens, streets and the like. At present, a blowing and sucking fan generally comprises a gasoline engine, a fan, an impeller, a blowpipe and other components, and air flow blown by the blowpipe cleans a cleaning target. For the current blower, a centrifugal fan is generally adopted as a driving device, and air is blown out by combining a traditional belly pipe, but although the airflow generated by the centrifugal fan has a larger air speed, the air volume and the air pressure of the centrifugal fan are small, the fan efficiency is low, and the belly pipe is adopted for blowing out air, the flow expansion effect is poor, the air volume and the air pressure of the airflow cannot be increased, the conditions that wet leaves are blown still and the fan efficiency is low exist when the blower is used, the optimal blowing effect cannot be achieved, the working requirement cannot be met, and the use of a user is influenced.
Disclosure of Invention
The invention aims to provide a blowing and sucking fan, which adopts an axial flow fan to generate high-speed airflow, realizes the effects of expanding and increasing the speed of the airflow through a blowing pipe and greatly improves the fan efficiency of the blowing and sucking fan.
In order to achieve the purpose, the invention provides the following technical scheme: a suction and blowing fan comprising:
the air conditioner comprises a shell, wherein an air inlet and an air outlet which are communicated with the outside are formed in the shell;
the fan is arranged in the shell and used for generating air flow;
the fan is an axial flow fan, the axial flow fan comprises a motor and an axial flow fan, and the motor and the axial flow fan are arranged in the same axial direction; the blowing pipe comprises a main blowing pipe and a flow expansion pipe connected with the main blowing pipe, the main blowing pipe comprises a first end and a second end, the first end is connected with the main body, the second end is provided with a connecting portion, one end of the flow expansion pipe is connected with the connecting portion, the other end of the flow expansion pipe is an air outlet, the diameter of the flow expansion pipe is larger than that of the connecting portion, and the rotating speed range of the motor is 20000-50000 RPM.
Furthermore, the length of the main blow pipe is 450-600 mm, and the length of the flow expansion pipe is 0.2-0.3 times of the length of the main blow pipe.
Further, the diameter of the flow expansion pipe is 1.2-1.6 times of the diameter of the connecting part.
Further, the length of the connecting part is 0-0.2 times of the length of the flow expansion pipe.
Furthermore, the flow expansion pipe is in a straight cylinder shape, or the flow expansion pipe is in an oblique cone shape, and the cross-sectional area of the flow expansion pipe is gradually reduced from one side of the connecting part to the air outlet.
Furthermore, the flow expansion pipe is in an oblique cone shape, and the taper of the flow expansion pipe is 1.5-3 degrees.
Further, the main blow pipe is tapered, and the cross-sectional area of the main blow pipe gradually decreases from the first end to the second end.
Further, the taper of the main lance tube is less than 3 °.
Further, the flow expansion pipe is movably mounted on the connecting part, and the flow expansion pipe can move on the connecting part relative to the connecting part along the axial direction of the flow expansion pipe.
Furthermore, the flow expansion pipe is movably installed on the connecting part through a telescopic assembly, and the telescopic assembly comprises a plurality of umbrella rib structures which are connected with the flow expansion pipe and the connecting part.
Compared with the prior art, the invention has the beneficial effects that: according to the blowing and sucking fan, the axial flow fan is arranged in the shell, the rotating speed range of a motor in the axial flow fan is 20000-50000 RPM, compared with a traditional centrifugal fan, the blowing and sucking fan can provide high-speed jet airflow by adopting the high-speed axial flow fan, the blowing and sucking fan has larger air volume and higher air speed, then the airflow sequentially passes through the main blowing pipe and the flow expansion pipe, and when the airflow passes through the connecting part with the smaller diameter, the air volume of the airflow is reduced, and the air speed is increased; when the airflow passes through the flow expansion pipe with a larger diameter, the diameter of the airflow is larger than that of the connecting part, so that a siphon effect can be generated in the flow expansion pipe, the air volume and the air pressure in the flow expansion pipe are improved, and the purpose of flow expansion is achieved. Therefore, the air blowing and sucking machine of the invention adopts the motor to generate high-speed airflow, and realizes the effects of expanding and increasing the speed of the airflow through the blowing pipe, thereby greatly improving the fan efficiency of the air blowing and sucking machine.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a sectional view showing the overall structure of a suction and blowing fan according to the present invention;
FIG. 2 is a schematic view of the whole structure of the blowing and sucking fan of the present invention;
fig. 3 to 5 are schematic structural views of a main body part in the air blower according to the present invention;
fig. 6 is a schematic view of the construction of the blower pipe in the suction blower according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a blowpipe in the suction blower according to the first embodiment of the present invention;
fig. 8 is a schematic structural view of a blowing pipe in a suction blower according to a second embodiment of the present invention;
fig. 9 is a schematic structural view of a blowpipe in the suction blower according to the third embodiment of the present invention;
fig. 10 is a schematic structural view of a blowpipe in the suction blower according to the fourth embodiment of the present invention;
fig. 11 is a schematic structural view of a blowing pipe in a suction blower according to a fifth embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "axial direction", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 6, the whole of the blower/suction fan extends in the direction indicated by the arrow a in fig. 2, which defines the direction as the axial direction, and the direction indicated by the arrow is front and the other direction is rear. Fig. 1 shows a blowing and sucking fan according to the present invention, which includes:
the air conditioner comprises a shell 1, wherein an air inlet 101 and an air outlet 102 which are communicated with the outside are arranged on the shell 1;
a fan 2 disposed in the housing 1 for generating an air flow;
the fan 2 is an axial flow fan, and includes a motor 21 and an axial flow fan 22, the motor 21 and the axial flow fan 22 are disposed in the same axial direction (axial direction of the blower fan), the axial flow fan 22 is disposed at the front end of the housing 1, the motor 21 is disposed at the rear end of the housing 1, and the axial flow fan 22 is driven by the motor 21 to rotate and generate an air flow. The casing 1 includes a main body 11 and a blast pipe 12 connected to the main body 11, and the axial flow fan 2 is disposed in the main body 11. The blowpipe 12 includes a main blowpipe 121 and a blowpipe 122 connected to the main blowpipe 121, the main blowpipe 121 includes a first end (rear end) and a second end (front end) that penetrate therethrough, the main blowpipe 121 has a rear end connected to the body 11, and a front end having a connecting portion 123. The rear end of the flow expansion pipe 122 is connected to the connecting portion 123, the front end is the air outlet 102, and the diameter of the flow expansion pipe 122 is larger than that of the connecting portion 123.
In the present invention, the diffuser 122 may be a straight cylinder or an oblique cone, and preferably, the diffuser 122 is an oblique cone having a taper of 1.5 to 3 °, a diameter of 1.2 to 2 times of the diameter of the connection part 123, and a length of 0.2 to 0.4 times of the length of the main blowing pipe 121. The main blow pipe 121 may be a straight pipe type or a tapered shape, and preferably, the main blow pipe 121 is a tapered shape with a taper smaller than 3 °, and the length of the connecting portion 123 provided thereon is 0 to 0.2 times the length of the diffuser pipe 122, that is, the diffuser pipe 122 may be partially overlapped with the main blow pipe 121, or may not be overlapped. Because the blowing and sucking fan adopts the axial flow fan 2 to provide airflow, compared with the traditional centrifugal fan, the blowing and sucking fan adopts the high-speed axial flow fan 2 to provide airflow which can be sprayed at high speed, and has larger air volume and higher air speed. In view of the fact that a high-speed motor generally needs to be matched with a small-diameter blowing pipe, in order to further increase the air volume, when the airflow passes through the connecting portion 123 with a small pipeline diameter, a front-end pipe opening portion of the main blowing pipe 121 has a large pressure loss, so that lateral dynamic pressure loss is large, in order to reduce lateral pressure loss, a flow expansion air inlet (the rear end of the flow expansion pipe 122) is added in front of a pipe opening, the air volume and the air outlet area can be increased, meanwhile, peripheral airflow is rectified into axial airflow, the improvement of the fan efficiency is facilitated, and finally, the airflow blown out from the air outlet 102 has a large air volume and a large air speed.
In the present invention, the blowpipe 12 may be integrally formed by the main blow pipe 121 and the diffuser pipe 122, or may be formed by connecting a main blow pipe (main blow pipe 121) and a diffuser pipe (diffuser pipe 122) provided separately. The method mainly comprises the steps that firstly, airflow passes through a pipeline with a small diameter to achieve the effect of increasing the wind speed, then the airflow is enabled to increase the wind quantity in the pipeline with the large diameter through the siphon effect, and the wind speed is further increased.
In the present invention, the main body 11 and the blowpipe 12 may be provided separately or may be integrally formed. In a preferred embodiment of the invention, as shown in fig. 2 and 4, the body portion 11 is formed by assembling two half shells. Specifically, the main body 11 includes a left casing 111, a right casing 112 and a duct portion 113, the air inlet 101 is disposed on the side surfaces of the left casing 111 and the right casing 112, and includes an axial air inlet 1011 and a radial air inlet 1012 circumferentially disposed on the left casing and the right casing. The arrangement of the plurality of air inlets 101 further ensures the increase of the air intake.
In the present invention, the left housing 111 and the right housing 112 are combined to form an accommodating space for accommodating the motor 21 therein, and a heat dissipating port 114 is provided at the rearmost end of the main body 11. The duct portion 113 is connected with the blowing pipe 12, the left casing and the right casing respectively, an axial flow fan 22, a transmission shaft 103 and a diversion cone 3 are arranged in the duct portion 113, an output shaft 211 of the motor 21 can be connected with the transmission shaft 103 through a connecting shaft sleeve 104, the rear end of the transmission shaft 103 is connected with the connecting shaft sleeve 104 and is fixed and limited through a clamping ring 105, and the front end of the transmission shaft 103 is connected with the axial flow fan 22 and is fixed and limited through a locking nut 106. The guide cone 3 is partially arranged in the duct part 113 and comprises a rear guide cone 31 and a front guide cone 32 which are positioned on the same axial direction with the axial flow fan 2, the rear guide cone 31 is arranged in the main blow pipe 121, the front guide cone 32 is arranged in the duct part 113 and is arranged on the connecting shaft sleeve 104, and the axial flow fan 22 is arranged between the rear guide cone 31 and the front guide cone 32. The rear guide cone 31 and the front guide cone 32 are both conical structures, the sectional area of the rear guide cone 31 in the axial direction tends to increase gradually from the rear end to the front end, and the sectional area of the front guide cone 32 in the axial direction tends to decrease gradually from the rear end to the front end. The design enables the wind entering from the wind inlet 101 to be firstly concentrated to the fan blades of the axial flow fan 22 through the rear guide cone 31, and then the wind has larger wind pressure and wind speed in the main blow pipe 121 through the action of the rear guide cone 31.
In the present invention, the duct portion 113 is a circular truncated cone structure, and the rear end thereof is fixedly connected to the left and right housings. A stopper projection 1131 is provided on the vertically symmetrical surface of the culvert portion 113 to restrict the culvert portion 113 from rotating in the circumferential direction with respect to the main body portion. The duct portion 113 is further provided with a plurality of guide plates (not shown) for guiding the airflow entering the air inlet 101. The guide plates are provided on the circumferential surface of the bypass portion 113, and are arranged at equal intervals in the circumferential direction. The setting of guide plate can be with leading the flow direction of the air current that enters into duct portion 113 just for the air current moves forward to guide cone 3 along the axial in duct portion 113 along the guide plate on, reduces the air loss, the increase air output.
In the present invention, the number of the axial fans 22 can be selected according to actual conditions, when a plurality of axial fans 22 are provided in the blower/extractor, the axial fans 22 may have the same or at least partially different structures, and each axial fan 22 and the motor 21 need to be in the same axial direction. Compared with a single fan, the arrangement of a plurality of fans always brings higher noise design limitation, and the axial line of each axial flow fan 22 is designed to be overlapped with the axial line of the motor 21, so that the noise of the whole machine is greatly reduced, and the blowing efficiency is better.
In the invention, the adopted motor 21 is a high-speed motor, and the rotating speed of the motor is preferably 20000-50000 RPM; the axial fan 22 used is a high speed motor blade capable of generating a relatively high velocity airflow. The main blowing pipe 121 and the diffuser pipe 122 of the invention are both in the same axial direction with the axial flow fan 2, and the fan efficiency of the suction fan is maximized on the premise of not increasing the size.
In the invention, the axial flow fan 2 is arranged in the shell 1 through a plastic bracket (not shown) and a rubber damping block (not shown) and is detachably connected, so that when the suction fan is idle, the axial flow fan 2 can be detached and used for other power tools, and the waste of resources is reduced.
In the present invention, the material used for the blowpipe 12 is preferably ABS plastic, polypropylene material, polycarbonate material or high density polyethylene material, so that it has good impact resistance, heat resistance, oxidation resistance and wear resistance.
In the present invention, the blowing and suction fan further includes a handle 200 to be held by an operator, and preferably, the handle 200 is formed by combining two half handle portions that are symmetrical to each other and is integrally formed with the left and right casings. The handle 200 is also provided with a control switch (not shown) electrically connected to the motor 21 to control the on/off of the motor.
As shown in fig. 6, in a preferred embodiment of the present invention, the blowpipe 12 includes a main blowpipe (main blowpipe 121) and a blowpipe (blowpipe 122) which are separately provided, and a connection portion 123 is provided at a front end of the main blowpipe 121. Specifically, the diffuser 122 is movably mounted on the connecting portion 123 through the telescopic assembly 4, so that the diffuser 122 can move back and forth on the connecting portion 123 along the axial direction of the diffuser 122 relative to the connecting portion 123. In this embodiment, the telescopic assembly 4 is an existing umbrella frame structure, which is connected to the flow-expanding tube 122 and the connecting portion 123, respectively, but in other embodiments, the structure of the telescopic assembly 4 can be selected according to actual needs.
In the present embodiment, the motor 21 is a high-speed motor, and the rotation speed thereof is 32000 RPM. The main blow pipe 121 and the flow expansion pipe 122 are in an oblique conical shape, wherein the taper of the main blow pipe 121 is 1.5 degrees, the length is 680mm, the diameter is 55-65 mm, and the cross section area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the taper of the flow expansion pipe 122 is 1.8 degrees, the length is 200mm, the diameter is 95-105 mm, and the cross-sectional area of the flow expansion pipe in the axial direction is gradually reduced from the rear end to the front end. The length of the connection part 123 is 5mm, that is, the length of the overlapping region of the diffuser pipe 122 and the main torch 121 is 5 mm. And the diffuser 122 can be retracted backwards or extended forwards relative to the connecting part 123 in the axial direction of the air suction blower through the telescopic assembly 4, and the retraction or extension distance is-10 to 50 mm.
The working principle of the blowing and sucking fan is as follows:
as known to those skilled in the art, the operation of the blower and suction fan depends mainly on the amount and pressure of the air. The volume of air delivered by the fan is the volume of air delivered by the fan per unit time. The wind pressure of the fan is the difference between the full pressure of the outlet airflow and the full pressure of the inlet airflow of the fan, and is called the wind pressure.
In this embodiment, when the blower is in blowing operation, when the blades of the axial fan 22 rotate, air is cut, wherein one side of the blades drives the air, resulting in an increase in the local pressure of the air and an increase in the density of the air (with the power to automatically restore normal pressure), and because the blades are rigid, the locally compressed air can only move in a direction away from the blades, thereby causing the air to move directionally, resulting in a blowing effect. Specifically, the method comprises the following steps: the motor drives the axial fan 22 to rotate, external air flow is driven to flow into the duct portion 113 through the air inlet 101, then flows into the main blow pipe 121 through the guide cone 3, and finally strong jet air flow is formed at the air outlet 102 of the diffuser pipe 22. Therefore, in the present embodiment, the air volume flowing into the main blowing pipe 121 is significantly increased under the combined action of the axial flow fan 2 and the air inlet 101; the wind pressure generated by the airflow flowing into the main blowing pipe 121 is inevitably larger at the rear end of the main blowing pipe 121 due to the arrangement of the diversion cone 3. When the airflow enters the diffuser 122, the wind pressure at the rear end of the diffuser 122 is less than the wind pressure at the wind outlet 102, so that a siphon effect can be generated in the diffuser 122, thereby improving the wind volume and the wind pressure in the diffuser and achieving the purpose of flow expansion. Moreover, because the diffuser 122 has a taper, the wind speed of the airflow therein gradually increases from the rear end to the front end, and finally, the airflow ejected from the air outlet 102 has both a large wind volume and a large wind speed and wind pressure.
In this embodiment, the input power of the suction blower is 1198.32W, the air volume is 529.66CFM, the average air speed of the air outlet is 69m/s, the air pressure of the air outlet is 3000Pa, the output power of the suction blower of this embodiment is 714.15 calculated according to the formula 0.6 ×, the air speed ^3 × and the area of the nozzle, and the blower efficiency is 714.15/1198.32 × 100, namely 59.6%.
In this embodiment, when the induced-draft fan is in the work of induced-draft, its principle is similar with the work of blowing, and blade one side compressed air, its back makes air density reduce, needs supplementary air to resume original balance, because the blade blocks, can not obtain the air from the place ahead again, can only obtain the air from the blade rear, if make the tube-shape pipeline behind the blade, the air just directional removal produces the effect of induced-draft.
Example one
In the embodiment, the blowpipes 1 to 12 comprise main blowpipes 1 to 121 and diffuser pipes 1 to 122 which are separately arranged, and the connecting parts 1 to 123 are arranged at the front ends of the main blowpipes 1 to 121. Specifically, the motors 1-21 used are high speed motors, which rotate at 32000 RPM. The main blow pipe 1-121 and the flow expansion pipe 1-122 are in oblique conical shapes, wherein the taper of the main blow pipe 1-121 is 1.5 degrees, the length is 680mm, the diameter is 55-65 mm, and the cross sectional area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the taper of the flow expansion pipes 1-122 is 1.8 degrees, the length is 180mm, the diameter is 95-105 mm, and the cross-sectional area of the flow expansion pipes in the axial direction is gradually reduced from the rear end to the front end. The length of the connecting part 1-123 is 5mm, namely the length of the overlapping area of the diffuser pipe 1-122 and the main blow pipe 1-121 is 5 mm. And the flow expanding pipes 1-122 can be contracted backwards or elongated forwards relative to the connecting parts 1-123 in the axial direction of the air blowing and sucking machine through the telescopic components 1-4, and the contraction or elongation distance is-10-50 mm.
Example two
In the embodiment, the blowpipes 2 to 12 comprise main blowpipes 2 to 121 and diffuser pipes 2 to 122 which are separately arranged, and the connecting parts 2 to 123 are arranged at the front ends of the main blowpipes 2 to 121. Specifically, the motors 2-21 used are high speed motors, which rotate at 32000 RPM. The main blow pipe 2-121 and the flow expansion pipe 2-122 are in oblique cones, wherein the taper of the main blow pipe 2-121 is 1.5 degrees, the length is 680mm, the diameter is 55-65 mm, and the cross sectional area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the taper of the flow expansion pipes 2-122 is 1.8 degrees, the length is 180mm, the diameter is 95-105 mm, and the cross-sectional area of the flow expansion pipes in the axial direction is gradually reduced from the rear end to the front end. The length of the connecting part 2-123 is 20mm, namely the length of the overlapping area of the diffuser pipe 2-122 and the main blow pipe 2-121 is 20 mm. And the flow expansion pipes 2-122 can be backwards contracted or forwards elongated relative to the connecting parts 2-123 in the axial direction of the air blowing and sucking machine through the telescopic components 2-4, and the contraction or elongation distance is-10-50 mm.
EXAMPLE III
In the embodiment, the blowpipe 3-12 comprises a main blowpipe 3-121 and a diffuser pipe 3-122 which are separately arranged, and the connecting part 3-123 is arranged at the front end of the main blowpipe 3-121. Specifically, the motors 3-21 used are high speed motors, which rotate at 32000 RPM. The main blow pipe 3-121 and the flow expansion pipe 3-122 are in oblique cones, wherein the taper of the main blow pipe 2-121 is 1.5 degrees, the length is 680mm, the diameter is 55-65 mm, and the cross sectional area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the taper of the flow expansion pipes 3-122 is 1.8 degrees, the length is 180mm, the diameter is 95-105 mm, and the cross-sectional area of the flow expansion pipes in the axial direction is gradually reduced from the rear end to the front end. The telescopic assembly 3-4 is arranged on the connecting part 3-123 and is connected with the flow expansion pipe 3-122, and the flow expansion pipe 3-122 and the main blow pipe 3-121 have no overlapping area. The flow expansion pipe 3-122 can be retracted backwards or extended forwards relative to the connecting part 3-123 in the axial direction of the air suction and blowing fan through the telescopic component 3-4, and the retraction or extension distance is-10-50 mm.
Example four
In the embodiment, the blowpipe 4-12 comprises a main blowpipe 4-121 and a diffuser pipe 4-122 which are separately arranged, and the connecting part 4-123 is arranged at the front end of the main blowpipe 4-121. Specifically, the motors 4-21 used are high speed motors, which rotate at 32000 RPM. The main blow pipe 4-121 is in an oblique cone shape, the flow expansion pipe 4-122 is in a straight cylinder shape, wherein the taper of the main blow pipe 2-121 is 1.5 degrees, the length is 680mm, the diameter is 55-65 mm, and the cross section area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the diffuser tube 4-122 has a length of 180mm and a diameter of 100mm, and its cross-sectional area in the axial direction gradually decreases from the rear end to the front end. The telescopic assembly 4-4 is arranged on the connecting part 4-123 and is connected with the flow expansion pipe 4-122, and the flow expansion pipe 4-122 and the main blow pipe 4-121 have no overlapping area. The flow expansion pipe 4-122 can be contracted backwards or elongated forwards relative to the connecting part 4-123 in the axial direction of the air blowing and sucking machine through the telescopic assembly 4-4, and the contraction or elongation distance is-10-50 mm.
EXAMPLE five
In the embodiment, the blowpipes 5-12 comprise main blowpipes 5-121 and diffuser pipes 5-122 which are separately arranged, and the connecting parts 5-123 are arranged at the front ends of the main blowpipes 5-121. Specifically, the motors 5-21 used are high speed motors, which rotate at 32000 RPM. The main blow pipe 5-121 is in an oblique cone shape, the flow expansion pipe 5-122 is in a straight cylinder shape, the taper of the main blow pipe 2-121 is 1.5 degrees, the length is 680mm, the diameter is 55-65 mm, and the cross section area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the diffuser pipe 5-122 has a length of 100mm and a diameter of 100mm, and its cross-sectional area in the axial direction gradually decreases from the rear end to the front end. The telescopic assembly 5-4 is arranged on the connecting part 5-123 and is connected with the flow expansion pipe 5-122, the length of the connecting part 5-123 is 20mm, namely the length of the overlapping area of the flow expansion pipe 5-122 and the main blow pipe 5-121 is 20 mm. The flow expansion pipe 5-122 can be retracted backwards or extended forwards relative to the connecting part 5-123 in the axial direction of the air suction and blowing fan through the telescopic assembly 5-4, and the retraction or extension distance is-10-50 mm.
EXAMPLE six
In this embodiment, the blowpipe includes a main blowpipe and a diffuser pipe that are provided separately, and the connecting portion is provided at the front end of the main blowpipe. Specifically, the motor used is a high speed motor with a rotational speed of 32000 RPM. The main blow pipe is in an oblique cone shape, the flow expansion pipe is in a straight cylinder shape, the taper of the main blow pipe is 1.5 degrees, the length of the main blow pipe is 680mm, the diameter of the main blow pipe is 55-65 mm, and the cross sectional area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the diffuser has a length of 150mm and a diameter of 100mm, and its cross-sectional area in the axial direction gradually decreases from the rear end to the front end. The telescopic assembly is arranged on the connecting portion and connected with the flow expansion pipe, and the flow expansion pipe and the main blowing pipe are free of overlapping areas. The flow expansion pipe can be retracted backwards or extended forwards relative to the connecting part in the axial direction of the air blowing and sucking machine through the telescopic assembly, and the retraction or extension distance is-10-50 mm.
EXAMPLE seven
In this embodiment, the blowpipe includes a main blowpipe and a diffuser pipe that are provided separately, and the connecting portion is provided at the front end of the main blowpipe. Specifically, the motor used is a high speed motor with a rotational speed of 32000 RPM. The main blow pipe is in an oblique cone shape, the flow expansion pipe is in a straight cylinder shape, the taper of the main blow pipe is 1.5 degrees, the length of the main blow pipe is 680mm, the diameter of the main blow pipe is 55-65 mm, and the cross sectional area of the main blow pipe in the axial direction is gradually reduced from the rear end to the front end; the diffuser has a length of 200mm and a diameter of 100mm, and its cross-sectional area in the axial direction gradually decreases from the rear end to the front end. The telescopic assembly is arranged on the connecting portion and connected with the flow expansion pipe, and the flow expansion pipe and the main blowing pipe are free of overlapping areas. The flow expansion pipe can be retracted backwards or extended forwards relative to the connecting part in the axial direction of the air blowing and sucking machine through the telescopic assembly, and the retraction or extension distance is-10-50 mm.
The following table is a comparison of specific parameters between the designs of various embodiments of the present invention, as can be seen from the following table: when the flow expansion pipe adopts the inclined cone shape, the air flow at the air outlet generally has higher wind speed. The sixth embodiment of the present invention is the best embodiment among the above embodiments, and it can be seen from the fourth, sixth and seventh embodiments that the length of the diffuser has the same influence on the flow velocity and the flow rate of the airflow, which is specifically shown as follows: .
In summary, the following steps: according to the blowing and sucking fan, the axial flow fan is arranged in the shell, the rotating speed range of a motor in the axial flow fan is 20000-50000 RPM, compared with a traditional centrifugal fan, the blowing and sucking fan can provide high-speed jet airflow by adopting the high-speed axial flow fan, the blowing and sucking fan has larger air volume and higher air speed, then the airflow sequentially passes through the main blowing pipe and the flow expansion pipe, and when the airflow passes through the connecting part with the smaller diameter, the air volume of the airflow is reduced, and the air speed is increased; when the airflow passes through the flow expansion pipe with a larger diameter, the diameter of the airflow is larger than that of the connecting part, so that a siphon effect can be generated in the flow expansion pipe, the air volume and the air pressure in the flow expansion pipe are improved, and the purpose of flow expansion is achieved. Therefore, the air blowing and sucking machine of the invention adopts the motor to generate high-speed airflow, and realizes the effects of expanding and increasing the speed of the airflow through the blowing pipe, thereby greatly improving the fan efficiency of the air blowing and sucking machine.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A suction and blowing fan comprising:
the air conditioner comprises a shell, wherein an air inlet and an air outlet which are communicated with the outside are formed in the shell;
the fan is arranged in the shell and used for generating air flow;
the fan is characterized in that the fan is an axial flow fan, the axial flow fan comprises a motor and an axial flow fan, and the motor and the axial flow fan are arranged in the same axial direction; the blowing pipe comprises a main blowing pipe and a flow expansion pipe connected with the main blowing pipe, the main blowing pipe comprises a first end and a second end, the first end is connected with the main body, the second end is provided with a connecting portion, one end of the flow expansion pipe is connected with the connecting portion, the other end of the flow expansion pipe is an air outlet, the diameter of the flow expansion pipe is larger than that of the connecting portion, and the rotating speed range of the motor is 20000-50000 RPM.
2. The suction blower according to claim 1, wherein the length of said main blow pipe is 450 to 600mm, and the length of said diffuser pipe is 0.2 to 0.3 times the length of said main blow pipe.
3. The suction and blowing fan according to claim 2, wherein the diameter of the diffuser is 1.2 to 1.6 times the diameter of the connection portion.
4. The suction blower according to claim 3, wherein the length of the connecting portion is 0 to 0.2 times the length of the diffuser pipe.
5. The suction blower according to claim 3, wherein the diffuser is a straight cylinder or an oblique cone, and a cross-sectional area of the diffuser decreases from a side connected to the connecting portion to the outlet.
6. The suction blower according to claim 5, wherein the diffuser is tapered at an angle of 1.5 to 3 °.
7. The suction blower of claim 2, wherein said main blow tube is tapered, said main blow tube decreasing in cross-sectional area from said first end to said second end.
8. The suction blower of claim 7, wherein the taper of the main blow tube is less than 3 °.
9. The induced-draft fan as claimed in claim 1, wherein the diffuser is movably mounted on the connection portion, and the diffuser is movable on the connection portion in an axial direction of the diffuser with respect to the connection portion.
10. The induced-draft fan as claimed in claim 9, wherein the diffuser is movably mounted to the connection portion by a telescopic assembly, the telescopic assembly including a plurality of rib structures connecting the diffuser and the connection portion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811552538.8A CN111336116A (en) | 2018-12-18 | 2018-12-18 | Blowing and suction fan |
| PCT/CN2019/116160 WO2020125255A1 (en) | 2018-12-18 | 2019-11-07 | Blowing and suction fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811552538.8A CN111336116A (en) | 2018-12-18 | 2018-12-18 | Blowing and suction fan |
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| Publication Number | Publication Date |
|---|---|
| CN111336116A true CN111336116A (en) | 2020-06-26 |
Family
ID=71179746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811552538.8A Pending CN111336116A (en) | 2018-12-18 | 2018-12-18 | Blowing and suction fan |
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| Country | Link |
|---|---|
| CN (1) | CN111336116A (en) |
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Effective date of registration: 20200630 Address after: 215123 Jiangsu Province, Suzhou City Industrial Park East Road, No. 18 Applicant after: Positec Power Tools (Suzhou) Co.,Ltd. Address before: 215123 Jiangsu Province, Suzhou City Industrial Park East Road, No. 18 Applicant before: Bao Shi De Technology (China) Co.,Ltd. |