CN211975528U

CN211975528U - Garden fan

Info

Publication number: CN211975528U
Application number: CN202020487625.6U
Authority: CN
Inventors: 李经纬; 山冈敏成; 聂方杰; 郭建朋
Original assignee: Nanjing Deshuo Industrial Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-11-20
Anticipated expiration: 2030-04-07

Abstract

The utility model belongs to the technical field of the fan, a gardens fan is disclosed, include: the shell assembly is provided with an airflow channel extending along a first straight line direction, and the airflow channel sequentially comprises an air inlet part for guiding airflow from the outside to enter the airflow channel, a duct for accommodating a fan and an air channel part for guiding the airflow passing through the fan to flow out of the airflow channel; the silencing hole region is communicated with the side wall of the duct, and a preset distance is reserved between the silencing hole region and a blade region of the duct, which is opposite to the blades of the fan; the silencing component at least partially covers the outer wall of the silencing hole area. The garden fan can effectively absorb high-frequency noise on the inner wall of the duct by covering the noise reduction assembly outside the noise reduction hole area formed on the side wall of the duct; the distance between the silencing hole area and the blade area is preset, and the noise reduction effect can be achieved while the blowing efficiency is not influenced.

Description

Garden fan

Technical Field

The utility model relates to a fan technical field especially relates to a gardens fan.

Background

Garden blowers, and in particular blowers, are one type of garden-like implement that may be operated by a user to blow clippings, leaves, etc. to sweep a garden or garden.

The hair dryer typically includes a main switch for activating the motor, other function switches, a housing, a circuit board, an air duct, and a mouthpiece. The hair-dryer during operation, fan blade cutting gas and with the air current friction, duct inner wall and air current friction can produce great noise, influence user experience and constitute great influence to all ring edge borders.

In the noise reduction structure in the prior art, the sound absorption sponge is generally attached in the machine barrel in an adhesive-backed mode, and the sound absorption sponge is inconvenient to replace due to the viscosity of the adhesive and the irregular shape of the sponge; the prior art also discloses a structure of making an uproar falls, inhales the sound sponge and passes through the connecting piece to be fixed on the dryer that the fan is just right, and this structure is though conveniently changing inhales the sound sponge, nevertheless leads to complete machine efficiency to descend owing to need just to the regional trompil at the fan.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gardens fan can effectively fall and make an uproar under the prerequisite that does not influence complete machine efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

a garden fan, comprising:

the shell assembly is provided with an airflow channel extending along a first straight line direction, and the airflow channel sequentially comprises an air inlet part for guiding airflow from the outside to enter the airflow channel, a duct for accommodating a fan and an air channel part for guiding the airflow passing through the fan to flow out of the airflow channel;

the silencing hole region is communicated with the side wall of the duct, and a preset distance is reserved between the silencing hole region and a blade region of the duct, which is opposite to the blades of the fan;

a sound attenuation component at least partially covering the outer wall of the sound attenuation hole area.

As a preferable technical solution of the garden fan, the sound deadening hole region includes a first sound deadening hole region and a second sound deadening hole region, and the first sound deadening hole region and the second sound deadening hole region are respectively disposed upstream and downstream of the blade region.

As a preferred technical scheme of the garden fan, a first preset distance is arranged between the first silencing hole area and the blade area, a second preset distance is arranged between the second silencing hole area and the blade area, and the value range of the first preset distance and the second preset distance is 2mm-4 mm.

As the preferable technical scheme of the garden fan, the plurality of the noise reduction assemblies are arranged and cover the outside of the noise reduction hole area in parallel along the axial direction of the duct.

As the preferable technical scheme of the garden fan, the silencing assembly comprises a silencing piece and a fixing piece, the silencing piece is wrapped outside the silencing hole area, and the fixing piece is wrapped outside the silencing piece and detachably connected with the duct.

As the preferable technical scheme of the garden fan, the fixing pieces of the two adjacent noise reduction assemblies are clamped.

As the preferable technical scheme of the garden fan, the silencing component is a ring-shaped piece, and the outer wall of the duct is sleeved with the silencing component.

As the preferable technical scheme of the garden fan, the noise reduction assembly is an arc-shaped piece, and the arc-shaped piece is attached to the outer wall of the duct.

As the preferable technical scheme of the garden fan, a mounting groove is formed in the shell component, and the silencing component is mounted in the mounting groove.

As a preferable technical scheme of the garden fan, fan blades of the fan are split type fan blades distributed around the axis, and the split type fan blades form a smooth cone around the axis of the fan.

Compared with the prior art, the utility model discloses an advantage and beneficial effect lie in:

the garden fan provided by the utility model can effectively absorb the high-frequency noise of the inner wall of the duct by covering the noise reduction assembly outside the noise reduction hole area arranged on the side wall of the duct; the distance between the silencing hole area and the blade area is preset, and the noise reduction effect can be achieved while the blowing efficiency is not influenced.

Drawings

Fig. 1 is a perspective view of a garden fan according to an embodiment of the present invention;

fig. 2 is a sectional view of a garden fan according to an embodiment of the present invention;

fig. 3 is a perspective view of the garden fan according to the embodiment of the present invention after the separation net is removed;

fig. 4 is an exploded view of a partial structure of a garden fan according to an embodiment of the present invention;

fig. 5 is a sectional view of a part of the structure of a garden fan according to an embodiment of the present invention;

fig. 6 is an exploded view of a fan according to an embodiment of the present invention;

fig. 7 is a perspective view of a fan having another structure according to an embodiment of the present invention.

The figures are labeled as follows:

100. a blower; 101. a first axis;

10. a fan; 1001. a wing tip; 11. a motor; 12. a housing assembly; 13. an air flow channel; 14. an isolation net; 15. a handle portion; 16. a noise reduction assembly; 17. a flow guide cone;

131. an inner wall; 132. an outer wall; 133. a duct; 134. an air duct portion; 135. an air inlet part;

1331. a sound deadening pore region; 1332. mounting grooves; 1333. an anti-drop limiting part; 1334. a blade region; 1351. an air inlet;

161. a noise reducing member; 162. and a fixing member.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly but via another feature. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 3, the present embodiment discloses a garden fan, which is specifically a blower 100 for blowing off weeds, fallen leaves, and the like in a garden. The garden fan in this embodiment mainly includes a housing assembly 12 extending in a first linear direction, a fan 10 and a motor 11 provided in the housing assembly 12, and a handle portion 15 provided outside the housing assembly 12. Wherein, the housing assembly 12 defines an air flow channel 13 in a first linear direction, and the fan 10 draws air flow from the tail part of the housing assembly 12 under the driving of the motor 11 and blows out from the air blowing port through the air flow channel 13. In the flowing direction of the air flow, the air flow channel 13 sequentially comprises an air inlet portion 135, a duct 133 and a duct portion 134, the fan 10 and the motor 11 are installed in the duct 133, and the motor 11 is used for driving the fan 10 to rotate around the first axis 101 to form the air flow. The fan is specifically an axial flow fan, and the air inlet portion 135 and the air channel portion 134 are respectively disposed at both sides of the axial flow fan. Specifically, the first line is parallel to the first axis 101, and in this embodiment, the first line substantially coincides with the first axis 101, the fan 10 can generate a blowing airflow entering the airflow channel 13 from the air inlet portion 135 when rotating, the air channel portion 134 is used for guiding the airflow flowing through the fan 10 to flow out of the airflow channel 13, and the air inlet portion 135 is used for guiding the airflow entering the airflow channel 13 from the outside. In the present embodiment, in the flow direction of the air flow, the side of the air inlet portion 135 is defined as upstream, and the side of the air channel portion 134 is defined as downstream.

The housing assembly 12 is also substantially symmetrical about a first plane of symmetry parallel to the first line. In particular, the housing assembly 12 comprises a first and a second housing symmetrical with respect to a plane of symmetry, which may be two separate pieces, which may be fixedly connected by screws. The first housing and the second housing form an air flow passage 13 around when they are mated. The airflow passage 13 is substantially a cylinder surrounding the first line, the cylinder being divided into an inner wall 131 and an outer wall 132. The fan 10 is disposed upstream of the motor 11. An air inlet 1351 is formed in the air inlet portion 135 of the airflow channel 13, and an isolation net 14 is further installed on the air inlet 1351, wherein the isolation net 14 is in a grid shape, can cover at least part of the air inlet 1351, and is connected to the air inlet 1351 through a detachable element. The separation net 14 enables the blowing air flow to uniformly enter the air flow channel 13, and the separation net 14 can also prevent larger particles of impurities from entering the air flow channel 13.

When a user operates the blower 100, the motor 11 is operated at a high speed, and the fan blades rub against the air flow to generate high-frequency noise. In the present embodiment, as shown in fig. 4 and 5, the sound-deadening assembly 16 is mounted on the outer wall of the airflow passage 13 to achieve effective absorption and suppression of the high-frequency noise, and the specific structure and connection manner of the sound-deadening assembly 16 will be described in detail below.

As shown in fig. 4 and 5, the duct 133 includes a silencing hole region 1331 and a vane region 1334, and a plurality of silencing holes penetrating through the side wall of the duct 133 are formed on the silencing hole region 1331. The blade region 1334 is a region that covers the blades of the fan 10. The sound deadening hole region 1331 is spaced a predetermined distance from the blade region 1334. Sound deadening hole region 1331 is surrounded by sound deadening assembly 16, and sound deadening assembly 16 includes sound deadening member 161 and fixing member 162. The sound-absorbing member 161 is used for sound absorption, and may be a sound-absorbing sponge, or other materials with sound-absorbing function or sound-absorbing/sound-suppressing function, which is not limited herein, as long as the above-mentioned high-frequency noise can be effectively absorbed or blocked. The sound deadening piece 161 is covered and disposed outside the sound deadening hole region 1331, and the fixing member 162 is covered and disposed outside the sound deadening piece 161 and detachably connected to the housing assembly 12, so as to fix the sound deadening piece 161 to the housing assembly 12.

Compared with the prior art, in the blower provided by the embodiment, the preset distance is arranged between the silencing hole region 1331 and the blade region 1334, holes do not need to be punched in the blade region 1334 and the interval region on the duct 133, and the noise reduction effect can be achieved while the blowing efficiency is not influenced; the noise reduction piece 161 is covered outside the noise reduction hole region 1331 formed on the side wall of the duct 133, so that the high-frequency noise in the duct 133 can be effectively absorbed; in addition, since the particular operation of blower 100 dictates that the life of the noise dampening assembly 16 be less than the life of the blower 100 itself, periodic replacement of the noise dampening assembly 16 is required during use. In order to facilitate replacement of the noise reduction assembly 16 and reduce replacement cost, in the present embodiment, the fixing member 162 is detachably connected to the housing assembly 12.

Further, the silencing hole region 1331 includes a first silencing hole region and a second silencing hole region, the first silencing hole region and the second silencing hole region are respectively arranged at intervals at the upstream and the downstream of the blade region 1334, the first silencing hole region and the second silencing hole region each include a plurality of silencing holes arranged at intervals, and the silencing assembly 16 is provided with a plurality of silencing holes and covers the silencing hole region 1331 in parallel along the axial direction of the duct 133. With this configuration, the blade region 1334 of the duct 133 need not be perforated, and has less of an impact on the efficiency of the fan 10. Further, the upstream and the downstream of the fan 10 are respectively provided with a flow guide cone 17, the equivalent diameter is reduced, the upper limit failure frequency is greatly increased, and the sound absorption effect of the silencing piece 161 is improved.

In order to ensure the structural strength of the housing assembly 12, the muffling hole area 1331 is arranged discontinuously, that is, each muffling hole area 1331 is discontinuous in the circumferential direction and includes at least two muffling hole partitions, and the distribution manner of the plurality of muffling holes in each muffling hole partition may be an integrally uniform distribution manner, a staggered arrangement manner, or an arrangement according to other preset rules and shapes, which is not limited in this embodiment.

In this embodiment, a first preset distance is spaced between the first sound deadening hole region and the blade region 1334, a second preset distance is spaced between the second sound deadening hole region and the blade region 1334, and the value ranges of the first preset distance and the second preset distance are 2mm to 4mm, and in this embodiment, 3mm is preferable. The perforated area is close to the noise source and absorbs the noise energy more easily. It can be understood that the values of the first preset distance and the second preset distance may be the same or different, and need to be selected according to actual situations.

In this embodiment, the noise reduction assembly 16 is a ring-shaped member, and the noise reduction assembly 16 is sleeved outside the outer wall of the duct 133. Specifically, the silencer 161 is an annular member, and the silencer 161 is sleeved on the outer wall of the duct 133 along the axial direction of the casing assembly 12 and located outside the silencing hole region 1331. Preferably, the width of the ring-shaped member is not less than the width of the sound deadening hole region 1331 so as to completely cover the sound deadening hole region 1331, ensuring a sound deadening effect.

In another embodiment, the sound attenuating assembly 16 is an arcuate member that is attached to the outer wall of the duct 133. Specifically, the silencer 161 is a split structure, and includes at least two arc silencers, and the arc silencers are attached to the outer wall of the duct 133 along the radial direction of the casing assembly 12. The silencer 161 of split type structure adopts the mode of concatenation to realize covering completely to muffler district 1331, compares in the silencer 161 of loop forming element structure, and this silencer 161 of split type structure installs and removes more conveniently.

In order to fix the noise reduction unit 161, the fixing unit 162 may be an annular unit or a split structure. Specifically, when the fixing element 162 is an annular element, the fixing element is sleeved outside the noise reduction element 161 along the axial direction of the housing assembly 12 to fix the noise reduction element 161, the noise reduction element 161 may be an annular element or a split structure, and the fixing element 162 of the annular structure may fix the noise reduction element on the outer wall of the duct 133. When mounting 162 is split type structure, mounting 162 includes two piece at least arc mounting 162, and arc mounting 162 pastes the outside of locating noise cancelling part 161 along casing subassembly 12 is radial, and arc mounting 162 and casing subassembly 12 joint each other or joint each other between the adjacent arc mounting 162, realize the fixed to noise cancelling part 161, and noise cancelling part 161 at this moment can be the loop forming element, also can be split type structure, and split type structure's mounting 162 all can be fixed it on the outer wall of duct 133. It should be noted that, compared to the fixing member 162 having a ring structure, the fixing member 162 having a split structure is more convenient and faster to assemble and disassemble.

Further, in the embodiment, as shown in fig. 4, an installation groove 1332 for installing the noise reduction assembly 16 is circumferentially provided on the outer wall of the duct 133, the noise reduction hole region 1331 is provided in the installation groove 1332, the installation groove 1332 may be integrally formed with the outer wall or fixedly connected to the outer wall, and the installation stability of the noise reduction assembly 16 is improved by providing the installation groove 1332. The radian of the installation groove 1332 and the radian of the silencing assembly 16 are the same as the radian of the outer wall of the duct 133, the width of the installation groove 1332 is larger than that of the silencing hole region 1331, and the two groove walls of the installation groove 1332 can prevent the silencing assembly 16 from axially displacing.

When mounting 162 chooses for use split type structure and with casing subassembly 12 mutual joint, mounting groove 1332 sets up at the interval in circumference, and mounting groove 1332 divide into the minute groove of a plurality of and 16 one-to-one of amortization subassembly in circumference promptly, and every circumference both ends that divide the groove all are equipped with the baffle, and arc mounting 162's both ends are connected with the baffle buckle, are equipped with the buckle on one of the two, are equipped with the bayonet socket on another. When the fixing member 162 is of a split structure and the adjacent arc-shaped fixing members 162 are connected to each other in a clamping manner, a buckle is arranged at the end of one arc-shaped fixing member 162, and a clamping hole is formed in the other arc-shaped fixing member.

In order to further improve the installation stability of the noise reduction assembly 16, a slot wall of the installation slot 1332 is further provided with an anti-slip limiting piece 1333, the anti-slip limiting piece 1333 is arranged higher than the slot wall, when the noise reduction assembly 16 is installed in place, an inner surface of the anti-slip limiting piece 1333 abuts against an outer surface of the fixing piece 162, and the fixing piece 162 is prevented from slipping off and separating from the housing assembly 12 along the radial direction.

In this embodiment, the width of the sound deadening hole region 1331 may be set according to the size of noise, alternatively, the width of the sound deadening hole region 1331 of the fan 10 on the air inlet side close to the air inlet portion 135 is greater than the width of the sound deadening hole region 1331 on the air outlet side far from the air inlet portion 135, and it can be understood that the width of the sound deadening assembly 16 and the width of the mounting groove 1332 are designed and adjusted according to the width of the sound deadening hole region 1331.

In order to improve the blowing efficiency of the blower, the twisting angle of the fan blades can be increased, but if the mode of increasing the twisting angle of the integral fan blades is adopted, the mold cannot be removed. Therefore, as shown in fig. 6, the fan blades of the fan 10 in this embodiment may be split type fan blades, that is, split type fan blades distributed around the axis, and the split type fan blades form a smooth cone around the axis of the fan 10, so as to have the function of a flow guiding cone. Specifically, the fan blades are disassembled one by one and then are taken out of the mold, and then are assembled together, so that the twist angle of the fan blades can be increased, and the blowing efficiency of the fan 10 is improved.

In this embodiment, as shown in fig. 7, the overall efficiency can also be improved by providing the end plate wingtips. Specifically, set up wingtip 1001 at fan blade tip end, from structural appearance, the fan blade structure that is provided with wingtip 1001 can effectively reduce the wake vortex, promotes the efficiency of blowing.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a gardens fan which characterized in that includes:

2. The garden fan of claim 1, wherein the sound-deadening aperture region comprises a first sound-deadening aperture region and a second sound-deadening aperture region, the first sound-deadening aperture region and the second sound-deadening aperture region being disposed upstream and downstream of the blade region, respectively.

3. The garden fan as claimed in claim 2, wherein the first silencing hole region is spaced from the blade region by a first preset distance, the second silencing hole region is spaced from the blade region by a second preset distance, and the first preset distance and the second preset distance have a value ranging from 2mm to 4 mm.

4. The garden fan as defined in any one of claims 1 to 3, wherein the noise reduction assembly is provided in plurality and covers the noise reduction hole area in parallel along the axial direction of the duct.

5. The garden fan as defined in claim 4, wherein the silencing assembly comprises a silencing piece and a fixing piece, the silencing piece is wrapped outside the silencing hole area, and the fixing piece is wrapped outside the silencing piece and detachably connected with the duct.

6. The garden fan as defined in claim 5, wherein the fixing pieces of two adjacent noise reduction assemblies are clamped.

7. The garden fan as claimed in claim 1, wherein the noise reduction assembly is a ring-shaped member, and the noise reduction assembly is sleeved outside the outer wall of the duct.

8. The garden fan as defined in claim 1, wherein the noise reduction assembly is an arc-shaped member attached to an outer wall of the duct.

9. The garden fan of claim 1, wherein the housing assembly is provided with a mounting slot in which the noise reduction assembly is mounted.

10. The garden fan of claim 1, wherein the fan blades are arranged as split blades distributed about an axis, the split blades forming a smooth cone about the axis of the fan.