CN203284755U

CN203284755U - Handheld type blower

Info

Publication number: CN203284755U
Application number: CN2013201532105U
Authority: CN
Inventors: 山冈敏成; 邵贤典
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-11-13
Anticipated expiration: 2023-03-29

Abstract

The utility model provides a handheld blower which comprises a shell body, a handle, a battery and an air blowing tube. An air inlet and a passage assembly are arranged on the shell body. The shell body is connected to the air blowing tube through the passage assembly. The battery is arranged on the shell body. The handle is located above the shell body and the battery. The passage assembly is arranged in front of the air inlet of the shell body. A central axis is defined in the length direction of the air blowing tube. The handle comprises holding parts distributed on the two sides of the plane where the gravity center of the whole body of the blower is located. The plane is parallel to the axis and is perpendicular to a working ground. The handheld type blower is impact in overall structure, and the gravity center is close to the holding parts, so that force needed by a user to overcome deviation of a handheld type blower at utilization time is reduced, handholding comfort degree is increased, and handholding fatigue caused by long-time utilization is reduced.

Description

Hand blower

Technical field

The utility model relates to a kind of garden type electric tool, particularly a kind of hand blower.

Background technology

Existing garden class hand blower is mainly realized power supply by dual mode, a kind of is external power supply, a kind of is to adopt power brick, if employing external power supply, often can only the work of carrying out of power interface arranged, limited greatly the spatial dimension of hand blower application, the employing power brick can very high addressing this problem.But, while adopting power brick, in order to guarantee flying power, the weight of power brick and size are often larger, along with continuing to increase of battery capacity, the overall weight of hand blower also increases thereupon, hand-held comfortableness reduces gradually, and the parts of most hand blower layout is unreasonable, causes malfunction, the operator in use needs additionally to provide the power that overcomes hand blower deflection, thereby easily causes hand to ache in long-time use procedure.

Summary of the invention

The purpose of this utility model is to provide a kind of operation comfort hand blower preferably.

for reaching above-mentioned purpose, the utility model provides a kind of hand blower, comprise housing, handle, battery and blower, be provided with air intake and Yi Gehan road assembly on described housing, housing is connected on blower by letter road assembly, described battery is arranged on housing, described handle is positioned at the top of housing and battery, described letter road assembly is installed on the place ahead of housing air intake, described blower has defined a central axis in the longitudinal direction, described handle comprises grip part, described grip part distributes in the both sides on the whole plane, center of gravity place of hair-dryer, described plane parallel is in described axis, and vertical with work ground.

Further, the both sides that are distributed in described plane of described grip part symmetry.

Further, described letter road assembly comprises the De Han road that is connected with housing, be installed to motor in the letter road and the tube connector of fan and a mutual clamping in Ge Yuhan road, and tube connector is connected with blower.

Further, described housing, battery ,Han road assembly and blower are located along the same line.

Further, described housing include the circulation of container cavity and air feed to sweep, described handle is arranged on the sweep of housing.

Further, described air intake comprises main air inlet, auxiliary air intake and sidepiece air intake, and main air inlet and auxiliary air intake all are arranged on the bottom of housing, and the sidepiece air intake is arranged on the sidewall of housing.

Further, an air intake box is installed in described housing container cavity, described air intake box and described letter road assembly are connected to form the unit that can work independently.

Further, described air intake box includes bottom air inlet section, inlet section, rear portion, sidepiece air intake and air outlet, an inclined-plane corresponding with sweep on housing is arranged in its postmedian inlet section, main air inlet on housing and bottom air inlet section and air outlet have formed the first blowing passage jointly, auxiliary air intake on housing and inlet section, rear portion and air outlet have formed the second blowing passage jointly, common the 3rd blowing passage that forms of the sidepiece air intake on housing and sidepiece inlet section and air outlet.

Further, described tube connector Yu Han is provided with the support ring that holds motor in road, motor is arranged in support ring, fan is connected with motor output shaft, equal one-body molded wind-guiding muscle that some divergent shapes are arranged in tube connector Ji Han road, and be provided with the passage that the power supply machine wire passes at least one described wind-guiding muscle.

Further, be provided with two lanyard holes on described housing, two lanyard holes are identical to the distance at handle center, also comprise braces on described hand blower, and the braces two ends are connected in described lanyard hole.

Hand blower of the present utility model is arranged on the both sides on plane, machine gravity place by the grip part with on handle, make compact overall structure, the centroidal distance grip part is near, reduce the operator and in use overcome the power that the hand blower deflection needs, increase hand-held comfort level, reduce hand-held sense of fatigue in long-time use procedure.

Description of drawings

Fig. 1 is the perspective view of the hand blower in the utility model embodiment;

Fig. 2 is the front view after the hand blower in the utility model embodiment removes partial shell;

Fig. 3 is the front view of the hand blower in the utility model embodiment;

Fig. 4 is the top view of the hand blower in the utility model embodiment;

Fig. 5 is the structural representation that the air intake He Yuhan road assembly of the hand blower in the utility model embodiment connects;

Fig. 6 is the structural representation of the handle of the hand blower in the utility model embodiment;

Fig. 7 is the sectional view of the hand blower De Han road assembly in the utility model embodiment;

Fig. 8 is the stereogram after the hand blower De Han road assembly in the utility model embodiment removes part letter road and tube connector;

Fig. 9 is the curve of the hand blower fan blade external diameter in the utility model embodiment and the efficiency function relation of drying.

The specific embodiment

For clearer understanding technology contents of the present utility model, especially exemplified by the specific embodiment and coordinate appended illustrate as follows.

Please refer to Fig. 1 and Fig. 2, hand blower 10 as the utility model embodiment, comprise housing 11, air intake box 12, handle 13, Control Component 14, battery 15,Han road assembly 17 and blower 19, letter road assembly 17 and battery 15 corresponding both sides that are positioned at housing 11 respectively wherein, handle 13 is arranged on housing 11, housing 11 is connected with blower 19 by letter road assembly 17, and air intake box 12 is positioned at housing 11 inside.

Please also refer to Fig. 3, housing 11 includes container cavity 110, installation portion 111, main air inlet 112, auxiliary air intake 113, sidepiece air intake 114 and sweep 115, container cavity 110 is formed in housing 11, air intake box 12 is arranged on container cavity 110 Zhong，Han road assembly 17 1 ends and is fixedly mounted in installation portion 111.Main air inlet 112 and auxiliary air intake 113 all are arranged on the bottom of housing 11, sidepiece air intake 113 is arranged on the sidewall of housing 11, air-flow enters by main air inlet 112 or auxiliary air intake 113, flows into letter road assembly 17 from installation portion 111 after the guiding of sweep 115.Sidepiece air intake 114 has the effect of auxiliary air intake, can play better air inlet effect, certainly also can not need sidepiece air intake 114.

please refer to Fig. 5, air intake box 12 includes bottom air inlet section 120, inlet section, rear portion 121, sidepiece inlet section 122 and air outlet 123, wherein bottom air inlet section 120 is the rail shape structure with inlet section, rear portion 121, and a ramp structure corresponding with sweep 115 on housing 11 is arranged in inlet section, rear portion 121, the air intake of the air outlet 123Yu Han road assembly 17 of air intake box 12 (figure is mark not) connects, air intake box 12Yu Han road assembly this moment 17 unit 18 that can work independently of formation, bottom air inlet section 120 on the air intake box, inlet section, rear portion 121, sidepiece inlet section 122 forms a plurality of blowing passages with air outlet 123 respectively, therefore no matter how housing 11 changes, can pack in housing and form the blowing passage in unit 18 as long as can work independently, machine just can be realized blowing function.Can, in the situation that the internal work unit is constant, change fast the external form of hand blower in this way.In embodiment of the present utility model, main air inlet 112 on housing 11 has formed the first blowing passage together with the blowing bottom air inlet section 120 of box 12 and air outlet 123, auxiliary air intake 113 on housing 11 has formed the second blowing passage together with the blowing inlet section, rear portion 121 of box 12 and air outlet 123, form the 3rd blowing passage together with the sidepiece inlet section 122 of the sidepiece air intake 114 on housing and blowing box 12 and air outlet 123.

Please also refer to Fig. 1, Fig. 2, Fig. 4 and Fig. 6, handle 13 is used for gripping hand blower 10, it is positioned at the top of housing 11 and battery 15 and is arranged on the sweep 115 of housing 11, handle 13 comprises grip part 130, battery installation section 131 and speed governing section 132, and wherein grip part 130 is between battery installation section 131 and speed governing section 132.

In the utility model embodiment, alongst defined an axis L 1 on blower 19, the center of gravity G of hair-dryer integral body is positioned on a plane P 1, and plane P 1 is vertical with the ground P2 of work, and is simultaneously parallel with axis L1.Housing 11, battery 15,Han road assembly 17 and blower 19 roughly are located along the same line, and the grip part 130 on handle 13 is distributed in the both sides of above-mentioned plane P 1, preferably grip part 130 symmetries are distributed in plane P 1 both sides.Compact conformation, near the centroidal distance grip part, reduced and in use overcome the power that the hand blower deflection needs like this, increases hand-held comfort level, reduces hand-held sense of fatigue in long-time use procedure.Battery can certainly be arranged on above or below housing 11, housing 11,Han road assembly 17 and blower 19 roughly are located along the same line, grip part 130 on handle 13 is distributed in the both sides of plane, center of gravity place (figure is mark not), described plane is parallel with the axis of blower 19, and vertical with work ground P2, above-described work ground is defined as a horizontal plane.

Control Component 14 is used for controlling switching and the rotating speed size of hand blower, it comprises the trigger 140 of controlling hand blower and opening and closing, the lock-button 141 that prevents the hand blower error starting, control hand blower with the amplification button 142 of maximum (top) speed running and the speed governing button 143 of adjusting hand blower motor 172 rotating speeds, and wherein speed governing button 143 is positioned in speed governing section 132.for the convenience that operates, wherein trigger 140, lock-button 141 and amplification button 142 all are arranged on grip part 130, such position arranges and can guarantee that the operator can amplify button 142 with the thumb operation in by trigger action 140, work under high speed blowing condition for a long time if need in addition, the operator also can press simultaneously and amplify button 142 and lock-button 141 by palm when holds handle 13, press trigger squeeze 140 by finger part in addition, so only by one-handed performance, can complete the startup of hand blower and with the running speed of maximum, keep its continuous running, reduce the fatigue of hand in use procedure, increase and grip comfort level.Wherein lock-button 141 is only the auxiliary switch spare that arranges in order to prevent maloperation from starting hand blower, can imagine also and can there is no lock-button 141, only by trigger 140 and amplification button 142, complete the start-up course of hand blower and keep its continuous running.

Battery 15 is arranged on housing 11 by battery installation section 131, be used for providing power supply to hand blower, be provided with the ejection that coordinates with battery 15 116 and battery mounting base (figure is mark) on housing 11, ejecting 116 is connected with spring 117, and housing rotation relatively, when battery 15 is installed on housing 11, the front end of battery 17 promotes to eject 116 elastic force that overcome spring 117 and rotates and be displaced to a precalculated position, when dismounting during battery 15, eject 116 and under the resilient force of spring 117, the direction of battery 15 towards dismounting ejected.

Be provided with battery snap close 1311 on battery installation section 131, battery snap close 1311 is used for battery 15 is locked at housing 11, on battery snap close 1311, interlock is provided with button release 1312, separate with battery 15 by the drive battery snap close 1311 of pressing or promote button release 1312 linkages, then battery 15 is ejecting under an effect of 116 and can disassemble easily.Certainly, battery installation section 131 also can be arranged on housing 11, as long as can play when battery 15 is installed the function that it is locked on the battery mounting base that arranges on housing 11.

please refer to Fig. 7 and Fig. 8, letter road assembly 17 comprises the tube connector 170 that is connected with blower 19, De Han road 171 is connected with housing 11, and motor 172 and fan 173, motor 172 is connected with the trigger 140 on Control Component 14 by wire, the mutual clamping in tube connector 170Yu Han road 171, be provided with the support ring 174 that holds motor 172 in tube connector 170Yu Han road 171, motor 172 is arranged in support ring 174, fan 173 is connected with the output shaft of motor 172, the interior all one-body molded wind-guiding muscle 175 that some divergent shapes are arranged in tube connector 170Ji Han road 171, wind-guiding muscle 175 1 ends are connected on the inwall in tube connector 170Huo Han road 171, the other end is connected on support ring 174, wherein be provided with the passage 176 that power supply machine 172 wires pass at least one wind-guiding muscle 175.So not only increased the reliability of wire location but also reduced windage, and not increased new part, during assembling, fixing cord is simple, reliable, convenient.Be understandable that,, if letter road 171 length are enough, also can not pass through tube connector 170, directly support ring 174 and wind-guiding muscle 175 are set on letter road 171.Letter road 171 has an inlet section 1711, in order to reduce the noise at 1711 places, inlet section, letter road, inlet section, letter road 1711 is arranged for ease of the lip limit structure of wind-guiding, and above-mentioned lip limit structure is can Yu Han road 171 integrally formed or form independent part and be installed on letter road 171.

In the utility model embodiment, fan 173 is aerofoil fan, motor 172 is brshless DC motor, fan 173 is driven by motor 172, it comprises a wheel hub 1731 that is installed on electric machine rotational axis (figure is mark not), a plurality of blades 1732 that are installed on above-mentioned wheel hub 1731, its Leaf 1732 can be one-body molded with wheel hub 1731, can be also to be assembled into together after separately being shaped.

Fan 173 is provided with radome fairing 177 near an end of housing 11, motor 172 is connected to the end of fan 173 near blower 19, because fan 173 is aerofoil fan, after air-flow enters fan 173 by the first blowing passage and second, third blowing passage, the axial wind-guiding muscle 175 that passes through under the effect of fan 173, and flow in blower 19.In the utility model embodiment, support ring 174 comprises accommodation section 1741 and the air dam 1742 that holds motor 172, the front end perforate of accommodation section 1741 (figure is mark not), air dam 1742 is pyramidal structure and one-body molded with accommodation section 1741, air dam 1742 is arranged on an end of close blower 19 on support ring 174, be provided with some fresh air inlets (figure is mark not) on air dam 1742, be used for cooling air and flow into.In the blowing process, because the air pressure of motor 172 peripheries is high than near the air pressure fan 173, produce time air-flow under the effect of pressure differential, inferior air-flow flows into support ring 174 inside by the fresh air inlet on air dam 1742, cooling motor 172 inside, final front end perforate by accommodation section 1741 is flowed out, and can play the effect of cooling motor 172 again like this in the process of blowing.

Please refer again to Fig. 3, for the ease of carrying, also be provided with the braces (not shown) on hand blower of the present utility model, the braces two ends are connected respectively to two the lanyard holes 118,119 that are arranged on housing 11, two lanyard holes 118,119 substantially the same to the distance at 130 centers, grip part, and the mid point of two lanyard holes 118,119 position lines be positioned at the machine gravity line near.

The hand-held DC blower is mainly used in blowing ground, court and grandstand neighbouring fallen leaves and small-sized rubbish, obtain through investigation,, in order to blow afloat the rubbish in a large amount of fallen leaves in ground and some cracks, usually need the air quantity of hand blower preferably to be greater than 395cfm.The limitation that the aspect such as power brick is arranged on hand-held DC blower on housing little and hair-dryer complete machine air-out efficiency is lower due to battery capacity in the market, cause hair-dryer to be difficult to reach air quantity greater than 395cfm, the working time is greater than the performance indications of 5min.Therefore,, in order to reach larger air quantity and higher blowing efficiency, need to parameter and the Duct design of battery capacity, brshless DC motor, aerofoil fan be optimized.

In order to reach desirable airflow value and the working time, the capacity of battery is usually greater than 170wh, generally the capacity of battery is directly proportional to the weight of itself, for hand blower, due to the weight requirement to complete machine, the preferable range of power brick capacity between 170wh-400wh,, if such setting is because the power brick capacity is too little on the one hand, can not meet the requirement of air quantity and working time; And if the power brick capacity is too large on the other hand, in use hand-held sense of fatigue can increase, and is unfavorable for that the operator works long hours.

Table 1 has been listed battery capacity when 200wh and 300wh, the effective time of hand blower when maximum quantity of wind operation and the operation of minimum air quantity.Also can find out from table 1, regularly, air quantity and working time are inversely proportional to battery capacity one, that is to say that air quantity is larger, and the working time is shorter.According to ergonomics, and by a large amount of simulated experiment analyses of bearing usage degree to complete machine weight, people, draw, the performance parameter that is fit to the hand-held direct current hand blower of popular client's instructions for use is: air quantity is between 385cfm-700cfm, and the working time is between 20min-75min.

Table 1

Battery capacity	Maximum quantity of wind	Minimum air quantity
			200wh	36min	120min
300wh	54min	180min

, in the situation that battery capacity is certain,, in order to obtain the hand-held direct current hand blower of an air quantity greater than 395cfm, higher blowing efficiency, also need parameter and the Duct design of brshless DC motor, aerofoil fan are optimized.

Please refer again to Fig. 7 and Fig. 8, motor 172 is received in the support ring 174 that arranges on letter road 171 and tube connector 170, the wheel hub 1731 of aerofoil fan 173 is installed on the axis of rotation (figure is mark not) of motor 172, according to aerodynamic principle, for reducing windage, improve wind speed, the outline of radome fairing 177, wheel hub 1731 and support ring 174 be designed to one streamlined, so motor 172 diameter have also determined the diameter of wheel hub 1731 simultaneously.In addition, when the design aerofoil fan, the ratio of the root diameter (RD) of blade and top diameter, being the fan hub diameter and the ratio of blade external diameter, below being called for short hub ratio, is a very important parameter, same impeller outer diameter, wheel hub leaflet length of a film is more suitable for the axial flow blower of low pressure and mass flow, and between 0.25-0.45, the air-out efficiency of fan blade is higher through the sunykatuib analysis hub ratio.If therefore motor diameter is larger, corresponding hub diameter also can be larger, for the hub ratio parameter is remained in optimum interval, thereby obtain higher air-out efficiency, the corresponding increase of the diameter of blade, and then cause letter road volume to increase, the volume of complete machine also increases, and is that the operational comfort in configuration design or actual use procedure all can affect adversely like this, and therefore preferred motor diameter is not more than 35mm, overall mass is lighter like this, takes up space less.Scope according to hub ratio, can further draw the scope of blade external diameter between 78mm-140mm, blowing efficiency is higher like this, as shown in Figure 9, C1 and C2 are respectively air quantity when 560cfm and 500cfm, curve map through functional relation between analogue simulation modeling analysis gained blade external diameter and blowing efficiency, the blade external diameter is when 85mm-140mm as seen from the figure, blowing efficiency is best, and the blowing definitions of efficiency here is the merit of air current flow generation and the ratio that fan blade is rotated the merit that consumes.

Further, less than 35mm, the ratio of air quantity and motor diameter, greater than 12cfm/mm, is therefore compared with common hand blower due to the diameter of motor, and the hand blower in the utility model obtains more powerful blowing effect by the motor of small size.

below Duct design of the present utility model is described in detail, please refer again to Fig. 2, direction along axis L1, the rear end of fan 173 near the flow cross section S1 in the air channel at air intake 112 positions greater than blower 19 on the flow cross section S3 at air outlet 191 positions, and form an annular circulating face (figure is mark not) between Zai Han road 171 inwalls and fan hub 1731, ratio between the flow cross section S2 of the flow cross section S3 at air outlet 191 positions on blower 19 and aerofoil fan 173 present positions annular circulating faces more preferably greater than or equal 0.8, like this effective airflow characteristic that improves is set, improve blowing efficiency.Simultaneously fan 173 is to outer contour L2 of 191 sections air channels definition of air outlet, and L1 and L2 have defined an angle.Preferably, angle between axis L1 and outer contour L2 is less than 8 degree, and arranging like this is because angle is larger forms certain windage to air-flow, and the air flow losses of wind path wall increases like this, in blower 19, the loss of the high velocity air of circulation increases, and causes the blowing Efficiency Decreasing of complete machine.By the optimization of above two parameters, can realize favourable air current flow situation simultaneously in the less pressure loss of the interior realization of blower 19, effectively improve blowing efficiency.

In order at air outlet 191 places, to reach enough air outputs, through the CFD(computational fluid dynamics) analyze and the test data summary, usually design larger air outlet place area, preferred, the cross-sectional area at air outlet 191 positions is set to greater than 4300mm2.Certainly, along with the increase wind speed of blowing area can decrease, through the preferred air outlet area of practical operation is set to 4300mm ²To 8000mm ²

The optimization of the parameter designing by the battery capacity in the utility model, brshless DC motor, aerofoil fan and the improvement of Duct design, when battery capacity is between 170wh-400wh, more than the air quantity of hand blower all can reach 395cfm, particularly when air quantity, during at 430-700cfm, still can meet the working time greater than 5min.In the time of simultaneously can guaranteeing that hair-dryer moves with maximum quantity of wind, the ratio of air quantity and input power is more than or equal to 0.7cfm/w, and blowing efficiency is very significantly improved.

Although the utility model discloses as above with preferred embodiment, so it is not in order to limit the utility model.Have and usually know the knowledgeable in technical field under the utility model, within not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is as the criterion when looking claims person of defining.

Claims

1. hand blower, comprise housing, handle, battery and blower, be provided with air intake and Yi Gehan road assembly on described housing, housing is connected on blower by letter road assembly, described battery is arranged on housing, it is characterized in that: described handle is positioned at the top of housing and battery, described letter road assembly is installed on the place ahead of housing air intake, described blower has defined a central axis in the longitudinal direction, described handle comprises grip part, described grip part distributes in the both sides on the whole plane, center of gravity place of hair-dryer, described plane parallel is in described axis, and vertical with work ground.

2. hand blower according to claim 1, is characterized in that: the both sides that are distributed in described plane of described grip part symmetry.

3. hand blower according to claim 1 is characterized in that: described letter road assembly comprises the De Han road that is connected with housing, be installed to motor in the letter road and the tube connector of fan and a mutual clamping in Ge Yuhan road, and tube connector is connected with blower.

4. hand blower according to claim 1, it is characterized in that: described housing, battery ,Han road assembly and blower are located along the same line.

5. hand blower according to claim 1 is characterized in that: described housing include container cavity and air feed circulation to sweep, described handle is arranged on the sweep of housing.

6. hand blower according to claim 1, it is characterized in that: described air intake comprises main air inlet, auxiliary air intake and sidepiece air intake, main air inlet and auxiliary air intake all are arranged on the bottom of housing, and the sidepiece air intake is arranged on the sidewall of housing.

7. according to claim 5 or 6 described hand blowers, it is characterized in that: an air intake box is installed in described housing container cavity, and described air intake box and described letter road assembly are connected to form the unit that can work independently.

8. hand blower according to claim 7, it is characterized in that, described air intake box includes bottom air inlet section, inlet section, rear portion, sidepiece air intake and air outlet, an inclined-plane corresponding with sweep on housing is arranged in the inlet section, rear portion, main air inlet on housing and bottom air inlet section and air outlet have formed the first blowing passage jointly, auxiliary air intake on housing and inlet section, rear portion and air outlet have formed the second blowing passage jointly, common the 3rd blowing passage that forms of the sidepiece air intake on housing and sidepiece inlet section and air outlet.

9. hand blower according to claim 3, it is characterized in that: described tube connector Yu Han is provided with the support ring that holds motor in road, motor is arranged in support ring, fan is connected with motor output shaft, equal one-body molded wind-guiding muscle that some divergent shapes are arranged in tube connector Ji Han road, and be provided with the passage that the power supply machine wire passes at least one described wind-guiding muscle.

10. hand blower according to claim 1, it is characterized in that: be provided with two lanyard holes on described housing, two lanyard holes are identical to the distance at handle center, also comprise braces on described hand blower, and the braces two ends are connected in described lanyard hole.