CN105465019A

CN105465019A - Air fan

Info

Publication number: CN105465019A
Application number: CN201610084403.8A
Authority: CN
Inventors: 任文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-02-14
Filing date: 2016-02-14
Publication date: 2016-04-06

Abstract

The invention relates to an air fan used for generating air flow. The air fan comprises a device used for forming main air flow and a nozzle; the nozzle comprises an internal channel and air outlets and extends around a first axis to limit an opening, and the main air flow emitted from the air outlets and secondary air flow formed through entrainment of the main air flow emitted from the air outlets pass through the opening together; the nozzle comprises a first surface and a second surface, the first surface is closely adjacent to the air outlets and is located on the upstream of the air outlets, and the second surface is closely adjacent to the air outlets and is located on the downstream of the air outlets; the first surface and the second surface are far away from the first axis in a tapered shape in the air outlet direction of the air fan; a first included angle and a second included angle which are smaller than 45 degrees can be formed between the first surface and a straight line parallel to the first axis and between the second surface and the straight line parallel to the first axis, a third included angle which is smaller than 45 degrees can be formed between the direction in which the air outlets emit the main air flow and the straight line parallel to the first axis, the first included angle is larger than the second included angle, and the difference between the second included angle and the third included angle is smaller than 10 degrees.

Description

Fan

Technical field

The present invention relates to a kind of fan.

Background technique

On March 31st, 2010, publication number was that the Chinese patent application (application number: 200910175867.X) of CN101684828A discloses a kind of fan for generation of air stream, this kind of fan comprises nozzle and the device for generation of the main air flow by described nozzle, described nozzle comprises the inner passage for receiving main air flow and the air outlet for launching main air flow, described nozzle is around an Axis Extension, to limit an opening, the main air flow launched from described air outlet together with entrainmented the secondary streams of formation by the main air flow launched from described air outlet by described opening, nozzle comprises a surface, described air outlet is set up and makes air-flow directed on a surface, this surface comprises diffusion section and guide portion, this diffusion section is taperedly away from described axis, this guide portion is also angled with it in the downstream of described diffusion section.

The secondary streams that the main air flow that the total air flow that this kind of fan exports forward is launched by air outlet and being entrainmented by main air flow is formed form, therefore, the effect that guided by surface of the effect that guided by surface of main air flow and secondary streams all by affect fan the effect of total air flow that exports.

Summary of the invention

The present invention aims to provide a kind of new fan, and this kind is for generation of the fan of air stream, and it comprises device for the formation of main air flow and nozzle; It is characterized in that, described nozzle comprises the inner passage for receiving main air flow and the air outlet for launching main air flow; Described nozzle around first axle extend to limit an opening, from air outlet launch main air flow together with entrainmented the secondary streams of formation by the main air flow launched from air outlet by described opening; Described nozzle comprises first surface and second surface, described first surface next-door neighbour air outlet the upstream being positioned at air outlet are to guide from entering the secondary streams of described opening around fan, and described second surface next-door neighbour air outlet the downstream being positioned at air outlet are to guide main air flow and secondary streams; Described first surface and described second surface along fan air-out wind direction all tapered away from first axle; Wherein, described first surface can form with the straight line being parallel to first axle the first angle being less than 45 ゜, described second surface can form with the straight line being parallel to first axle the second angle being less than 45 ゜, the direction that main air flow is launched in described air outlet can form with the straight line being parallel to first axle the 3rd angle being less than 45 ゜, and, first angle is greater than the second angle, and the difference of the second angle and the 3rd angle is less than 10 ゜.

Advantageously, the fan of this kind of structure, particularly described first surface and described second surface are relative to the position of described air outlet and relevant angle, effectively can guide the main air flow launched from air outlet and from entering the secondary streams of described opening around fan, described secondary streams particularly can be made effectively to be formed and be guided efficiently, and the total air flow that fan is exported has had raising or increase significantly; The nozzle of the fan of this kind of structure is easy to die sinking manufacture in addition, is conducive to the manufacturing efficiency improving whole fan.

Described first angle is usually located between 3 ゜ to 45 ゜, and preferably, described first angle is between 4 ゜ to 35 ゜; Described second angle is usually located between 1 ゜ to 20 ゜, and preferably, described second angle is between 1 ゜ to 15 ゜; Described 3rd angle is usually located between 1 ゜ to 14 ゜, and preferably, described 3rd angle is between 1 ゜ to 12 ゜.

The difference of described first angle and described second angle is greater than 2 ゜ usually, and preferably, the difference of described first angle and described second angle is between 3 ゜ to 35 ゜.

In a preferred embodiment, the difference of described second angle and described 3rd angle equals 0, and at this moment the direction of described air outlet transmitting main air flow guides the direction of air-flow to parallel with described second surface.

Preferably, described first surface along fan air-out wind direction conically away from described first axle; Described first surface also can be that part surface is conically away from described first axle along fan air-out wind direction.

Preferably, described second surface along fan air-out wind direction conically away from described first axle; Described second surface also can be that part surface is conically away from described first axle along fan air-out wind direction.

Preferably, the length of described first surface in described first axle direction between 8mm to 100mm, more preferably between 10mm to 80mm.

Preferably, the length of described second surface in described first axle direction between 8mm to 100mm, more preferably between 10mm to 80mm.

Described air outlet limited by pair of opposing surfaces usually; The width of described air outlet is usually located between 0.5mm to 10mm, is preferably located between 1mm to 6mm.

Described air outlet also can comprise multiple perforation; Described perforation can be limited by pair of opposing surfaces and link.

In a preferred embodiment, the described device for the formation of main air flow is arranged in pedestal, and described nozzle is arranged on pedestal.In another preferred embodiment, the described device for the formation of main air flow is arranged in described inner passage.

In a preferred embodiment, described nozzle also comprises the Coanda surface for guiding secondary streams to flow through; In another preferred embodiment, described nozzle also comprises the Coanda surface for guiding secondary streams to flow through, and described Coanda surface is close to described first surface and is positioned at the upstream of described first surface.

The described device for the formation of main air flow comprises motor and by motor-driven impeller.Motor can be DC brushless motor, also can be AC motor; Impeller can be horizontal impeller, can be mixed flow impeller, can also be other impeller.

Described fan usually or can increase by one and shakes the head frame with the coverage area of the wind increasing described fan and export by the technology of shaking the head of existing fan.

Described fan can be desk fan, can be wall fan, can be ceiling fan, can be flooring fan, can also be the fan of other type.

Accompanying drawing explanation

Fig. 1 is the front schematic view of fan of the present invention.

Fig. 2 is the side view of fan shown in Fig. 1.

Fig. 3 is the sectional view be exaggerated of the nozzle along the A-A line intercepting in Fig. 1.

Fig. 4 is the sectional view of the nozzle along the B-B line intercepting in Fig. 2.

Fig. 5 is along the support of B-B line intercepting in Fig. 2 and the sectional view be exaggerated of pedestal.

Fig. 6 is the front schematic view of the impeller chimney in Fig. 5.

Fig. 7 is the sectional view of the impeller chimney along the C-C line intercepting in Fig. 6.

Embodiment

Fig. 1 is the schematic diagram of the fan of the present invention from device forward observation, and Fig. 2 is the side view of the fan shown in Fig. 1.As can be seen from Fig. 1 and Fig. 2, the nozzle 1 that fan 100 comprises pedestal 3, is positioned at the support 2 on pedestal 3 and is arranged on support 2.

The top base 8 that pedestal 3 comprises bottom base 10 and is positioned on bottom base 10.Upper base portion 8 comprises suction port 9, and suction port 9 is for being formed in the form in the multiple holes on the sidewall of top base frame.Bottom base 10 comprises multiple control knobs 11,12 and 13 of user-operable.The air of fan outside is inhaled in top base 8 by suction port 9.

The lower end of support 2 and the upper end of top base 8 are fixed, and with reference to figure 5, support 2 comprises rack shell 201, there is the first export department 151 and the second export department 152 of air outlet, be positioned at rack shell and the support inner casing 202 fixing with rack shell, the first point of inner passage 171 limited by rack shell 201 and second point of inner passage 172, and the 3rd point of inner passage 161 jointly to be limited by rack shell 201 and support inner casing 202 and the 4th point of inner passage 162, wherein, first point of inner passage 171 is connected in series with the 3rd point of inner passage 161 at interface 181 place, second point of inner passage 172 is connected in series with the 4th point of inner passage 162 at interface 182 place, the upper end portion of the frame 21 of pedestal and the underpart 109 of rack shell 201 are fixed, support inner casing 202 comprises the import department 203 with suction port 204, the import department 203 of support inner casing 202 is tightly connected by flexible hose 205 with the outlet side 321 of steam outlet pipe 32.After air-flow enters the inner passage of support by the suction port 204 of support inner casing 202, be divided into two-way like this and divide air-flow, they can arrive the first export department 151 and the second export department 152 respectively.

In the present embodiment, flexible hose 205 is a rubber pipe; Support inner casing 202 is the circular shell of hollow, and the surrounding of the circular shell of this hollow and the inwall of rack shell 201 are fixed; Rack shell 201 and support inner casing 202 all formed by plastics.

According to Fig. 1 and with reference to figure 3 to Fig. 5, nozzle 1 comprises the frame 6 of annular, the entrance point 411 with suction port and entrance point 412, air outlet 7 and inner passage 14 and defines opening 5, an entrance point 411 of nozzle 1 is rotationally connected with the first export department 151 of support 2, another entrance point 412 of nozzle 1 is rotationally connected with the second export department 152 of support 2, such nozzle 1 that can make carries out rotation relative to support 2, so that this kind of fan changes the direction of launching air-flow in vertical plane.

In the present embodiment, the frame 6 of annular extends along first axle X to limit opening 5.

Fig. 3 shows the detail of the nozzle of fan shown in Fig. 1.As can be seen from Fig. 3, can be clear that from Fig. 3, nozzle 1 comprises first surface 61 and second surface 62; First surface 61 and second surface 62 along fan air-out wind direction all conically away from first axle X; First surface 61 is close to air outlet 7 and is positioned at the upstream of air outlet 7, in order to guide entrainment by the main air flow launched from air outlet 7 secondary streams entering opening 5 around fan of formation; Second surface 62 is close to air outlet 7 and is positioned at the downstream of air outlet 7, in order to guide main air flow and secondary streams; Nozzle 1 also comprises Coanda surface 63 and opens surface 64, and Coanda surface 63 is close to first surface 61 and is positioned at the upstream of first surface 61, for guiding secondary streams, opens surface 643 next-door neighbour's second surface 62.

In the present embodiment, first surface 61 can form with the straight line being parallel to first axle X the first angle α being less than 45 ゜, second surface 62 can form with the straight line being parallel to first axle X the second angle β being less than 45 ゜, the direction that main air flow is launched in air outlet 7 forms with the straight line being parallel to first axle X the 3rd angle γ being less than 45 ゜, wherein, first angle α is about 20 ゜, second angle β and the 3rd angle γ is about 5 ゜, the difference of the first angle α and the second angle β is about 15 ゜, obviously has the first angle α to be greater than the second angle β.

In the present embodiment, first surface 61 is about 40mm in the length of first axle X-direction, second surface 62 is about 35mm in the length of first axle X-direction, air outlet 3 is the form of multiple perforation, wherein, perforation limited by pair of opposing surfaces 65,66 and link 71, and its perforation is bending bar shaped perforation, and the width of this bar shaped perforation is about 1.5mm.

Fig. 5 illustrates the internal structure of support 2 and pedestal 3, and with reference to figure 6 and Fig. 7, pedestal 3 comprises bottom base 10 and has the top base 8 of frame 21, in the frame 21 of top base 8, be provided with the device for the formation of main air flow, the motor 24 of impeller chimney 22, impeller 23 and drives impeller 23 rotary work should be comprised for the formation of the device of main air flow.Impeller 23 is positioned at impeller chimney 22, and impeller chimney 22 has suction port 226 and air outlet 330, and impeller 23 can rotate around the second axis Y.Impeller chimney 22 comprises tubular shell 221, is positioned at the honeycomb duct 222 of tubular shell, multiple first dividing plate 223, multiple second partition 224 and multiple noise elimination cavity 225.

Tubular shell 221 is the cylinder shell of all lying out up and down, and its upper end has through hole 330, and its lower end has through hole 334, and its sidewall has multiple suction port 226, this cylinder shell is vertically arranged usually; Honeycomb duct 222 is the shell that a cross section alongst changes, this its upper part is one section of frustoconical shell 228, its lower part is a cylindrical section shape shell 229, honeycomb duct 222 has air outlet 333 at its upper end, there is in lower end suction port 335, its sidewall has multiple suction port 227.Honeycomb duct 222 and tubular shell 221 preferably formed by plastics, and the honeycomb duct 222 of the present embodiment is fixed with the inwall of tubular shell 221 at its upper end, and honeycomb duct 222 preferably integrally manufactures with tubular shell 221, i.e. integration.

Easily find out in Fig. 5 and Fig. 7, the present embodiment has 5 pieces of first annular dividing plates 223, and they are arranged between tubular shell and honeycomb duct in parallel to each other; 16 pieces of second partitions 224 are had to be positioned essentially vertically in relation to one another between tubular shell and honeycomb duct; Every block first dividing plate 223 is fixed with the inwall of tubular shell and the outer wall of honeycomb duct respectively, and each second partition 224 is also fixed with the inwall of tubular shell and the outer wall of honeycomb duct respectively.

With reference to figure 5 to Fig. 7, the impeller chimney of the present embodiment has multiple noise elimination cavity, and these noise elimination cavities form 4 layers along the second axis Y-direction, and every layer has 16 noise elimination cavities to arrange around the second axis Y; Each noise elimination cavity 225 limited by the outer wall of the inwall of tubular shell 221, honeycomb duct 222, the first dividing plate 223 and second partition 225, and the suction port of noise elimination cavity 225 is arranged on tubular shell, and the air outlet of noise elimination cavity 225 is arranged on honeycomb duct.

In the present embodiment, the suction port of noise elimination cavity 225 is exactly the enterprising gas port 226 of tubular shell 221, and the air outlet of noise elimination cavity 225 is exactly the suction port 227 on honeycomb duct 222; The area of the suction port 226 of noise elimination cavity 225 is less than the sectional area of noise elimination cavity 225 at suction port place; The area of the air outlet 227 of noise elimination cavity 225 is less than the sectional area of noise elimination cavity 225 at air outlet place.

Impeller chimney due to the present embodiment is placed in dunnage 336, the through hole 334 of tubular shell 221 lower end and the suction port 335 of honeycomb duct 222 lower end substantially cover in by dunnage 336, thus substantially do not have air-flow to be flowed by through hole 334 and suction port 335.Between dunnage 336 and impeller chimney between 22, one piece can be arranged there is flexible rubber circular plate, operationally the produced vibration of the parts such as impeller chimney, impeller and motor can be absorbed like this.

In the present embodiment, impeller 23 is arranged in the honeycomb duct 222 of impeller chimney 22, the motor 24 of its drives impeller rotary work also has part to be positioned at impeller chimney 22, the path that the noise that impeller 23 and motor 24 produce is propagated to the outside by the suction port 9 of pedestal is: first enter in noise elimination cavity 225 from the suction port 227 of honeycomb duct 222, then exported from the suction port 226 of tubular shell 221 by the cavity of noise elimination cavity, again by the space between frame 21 and tubular shell 221, finally outwards propagate from the suction port 9 being positioned at frame 21, therefore, the noise that impeller and motor produce outwards is propagated and will be subject to the decay of noise elimination cavity.Owing to having numerous noise elimination cavities in acting in conjunction, by making the noise outwards propagated be subject to very large decay, the noise that fan sends significantly can be reduced.

Can be clear that in the figure 7, the noise elimination cavity 225 of the present embodiment is from its suction port 226 to its air outlet 227, and the cross section of its noise elimination cavity reduces gradually.The change of the cross section of noise elimination cavity 225, particularly to suddenly change, be conducive to the acoustic reactance increasing sound, be particularly conducive to and reduce the lower noise of frequency.

In addition, easily find out from Fig. 5, the tubular shell 221 of impeller chimney 22 makes whole impeller chimney be easy to steady setting, is conducive to impeller 23 quick mounting like this or is fixed in impeller chimney 22, is also conducive to whole impeller chimney to be arranged at quickly and easily in the frame 21 of pedestal.

Motor 24 is contained in electric machine casing 25.Electric machine casing 25 comprises upper part 26 and lower part 27, and upper part 26 is fixed by screw and lower part 27 and is fixed therein by motor 24.The rotating shaft 38 of motor 24 is positioned at the hole of bottom through the lower part 27 being formed in electric machine casing 25, be connected in rotating shaft 38 to allow impeller 23.The upper part 26 of electric machine casing 25 also comprises multiple fixing rod 31, and motor 24 is fixed with impeller chimney 22 by multiple fixing rods 31 of electric machine casing 25.

In the present embodiment, impeller 23 and impeller chimney 22 are configured as when impeller 23 and electric machine casing 25 are supported by impeller chimney 22, and the blade tips of impeller 23 very close to the internal surface of the honeycomb duct 222 of impeller chimney 22, but does not touch this internal surface.

Impeller chimney 22 is provided with cable punching hole (not shown in FIG.), a fixing rod 31 of electric machine casing 25 is also provided with cable punching hole (not shown in FIG.), cable punching hole on impeller chimney 22 is aimed at the cable punching hole on fixing rod 31 and cable can be passed, and is connected to motor 24 from circuit arrangement 37 to facilitate cable.In the present embodiment, electric machine casing 25 and impeller 23 preferably formed by plastics.

Bottom base 10 is for engaging the surface at fan 100 place.Pedestal 3 also comprises the swing mechanism for making top base 8 swing back and forth relative to bottom base 10, and this swing mechanism comprises synchronous machine 36, and the operation of swing mechanism responds user by circuit arrangement 37 and presses control knob 13 and control.Hunting range is preferably between 60 ° and 120 °, and swing mechanism is set to 3 to 6 deflection periods of execution per minute.Cable (not drawing) for supplying power to fan extends through the hole be formed on bottom base 10.

In the present embodiment, motor 24 is DC brushless motors, and the rotating speed of motor responds user operation control knob 12 by circuit arrangement 37 and changes.

In order to operate fan 100, user presses the button 11, responds this operation, and circuit arrangement 37 activates motor 24 with rotary blade 23.The rotation of impeller 23 makes air enter in the frame 21 of pedestal 3 by suction port 9, then enter in impeller chimney from the suction port 226 of impeller chimney 22, impeller 23 drives air-flow export from the air outlet 330 of impeller chimney and enter the steam outlet pipe 32 fixing with the upper end of impeller chimney, because steam outlet pipe 32 is tightly connected by the import department 203 of flexible hose 205 with support inner casing, therefore the main air flow entered in steam outlet pipe 32 can be transported in the inner passage of support, and a point two-way is transported in nozzle 1.

In nozzle 1, main air flow divides two strands to advance in inner passage 14.The main air flow of advancing in inner passage 14 launch by air outlet 7, partial air around nozzle is entrainmented formation secondary streams by the main air flow launched from air outlet 7, this secondary streams be successively positioned at the Coanda surface 63 of first surface 61 upstream and be positioned at upstream, air outlet 7 first surface 61 guide, then be positioned at together with the main air flow launched from air outlet 7 second surface 62 in downstream, air outlet 7 guide, the main air flow launched from air outlet 7 like this with entrainmented formed by main air flow secondary streams be bonded the total air flow that fan launches forward.In the present embodiment, the position formed due to first surface 61, second surface 62 and air outlet 7 and angular dependence, make that secondary streams is formed effectively, main air flow and secondary streams are all effectively guided, be conducive to promoting or increase the total air flow that fan is launched forward.

Although shown and described and thought preferred embodiments of the invention at present, obviously, those skilled in the art can carry out various changes and improvements, and does not deviate from scope of the present invention as defined in appended claims.

Claims

1., for generation of a fan for air stream, described fan comprises device for the formation of main air flow and nozzle; It is characterized in that, described nozzle comprises the inner passage for receiving main air flow and the air outlet for launching main air flow; Described nozzle around first axle extend to limit an opening, from air outlet launch main air flow together with entrainmented the secondary streams of formation by the main air flow launched from air outlet by described opening; Described nozzle comprises first surface and second surface, described first surface next-door neighbour air outlet the upstream being positioned at air outlet are to guide from entering the secondary streams of described opening around fan, and described second surface next-door neighbour air outlet the downstream being positioned at air outlet are to guide main air flow and secondary streams; Described first surface and described second surface along fan air-out wind direction all tapered away from first axle; Wherein, described first surface can form with the straight line being parallel to first axle the first angle being less than 45 ゜, described second surface can form with the straight line being parallel to first axle the second angle being less than 45 ゜, the direction that main air flow is launched in described air outlet can form with the straight line being parallel to first axle the 3rd angle being less than 45 ゜, and, first angle is greater than the second angle, and the difference of the second angle and the 3rd angle is less than 10 ゜.

2., as claimed in claim 1 for generation of the fan of air stream, it is characterized in that, the difference of described second angle and described 3rd angle equals 0.

3., as claimed in claim 1 for generation of the fan of air stream, it is characterized in that, the difference of described first angle and described second angle is between 3 ゜ to 35 ゜.

4., as claimed in claim 1 for generation of the fan of air stream, it is characterized in that, described first angle is between 4 ゜ to 35 ゜.

5., as claimed in claim 1 for generation of the fan of air stream, it is characterized in that, described second angle is between 1 ゜ to 15 ゜.

6., as claimed in claim 1 for generation of the fan of air stream, it is characterized in that, described 3rd angle is between 1 ゜ to 12 ゜.

7. the fan for generation of air stream as described in one of claim 1 to 6, is characterized in that, described first surface along fan air-out wind direction conically away from first axle.

8. the fan for generation of air stream as described in one of claim 1 to 6, is characterized in that, described second surface along fan air-out wind direction conically away from first axle.

9. the fan for generation of air stream as described in one of claim 1 to 6, is characterized in that, the length of described first surface in first axle direction is between 10mm to 80mm.

10. the fan for generation of air stream as described in one of claim 1 to 6, is characterized in that, the length of described second surface in first axle direction is between 10mm to 80mm.