CN117860019A - Low noise blower - Google Patents

Abstract

The invention discloses a low-noise blower, which comprises a shell, a blower and a flow dividing piece; a mounting cavity is formed in the shell, and an air inlet and an air outlet which are communicated with the mounting cavity are respectively formed in two ends of the shell; the fan is arranged in the mounting cavity, and the air inlet end of the fan is arranged opposite to the air inlet; the air conditioner comprises a fan, a mounting cavity, a flow dividing piece, an air outlet, an air guide part and a fan, wherein the flow dividing piece is arranged in the mounting cavity, the flow dividing piece is opposite to the air outlet end of the fan, an air passage is formed in the periphery of the flow dividing piece, the air passage is communicated with the fan and the air outlet, the air guide part is arranged at one end of the flow dividing piece, facing the fan, of the flow dividing piece, and the air guide part is used for guiding air flow of the fan into the air passage. According to the technical scheme, the air flow blown out by the fan is guided to the air-passing channel through the air guide part and then flows out, so that the wind resistance of the flow dividing piece to the air flow is reduced, and the noise is reduced.

Description

Low noise blower

Technical Field

The invention relates to the technical field of fans, in particular to a low-noise blower.

Background

The low-noise blower is a small household appliance with very high use frequency in daily life, and is mainly used for drying and shaping hair. The existing low-noise blower is generally provided with an annular air outlet and is provided with a flow dividing piece corresponding to the annular air outlet, so that air flows out of the annular air outlet to be soft, however, the flow dividing piece blocks the air flow in the process of guiding the air flow to the annular air outlet, the air quantity is reduced, larger noise is easily generated, and the use experience of a user is affected.

Disclosure of Invention

The invention mainly aims to provide a low-noise blower, which is characterized in that air flow blown out by a blower is guided to an air passage through an air guide part and then flows out, so that the wind resistance of a flow dividing piece to the air flow is reduced, and the noise is reduced.

In order to achieve the above object, the present invention provides a low noise blower comprising:

the shell is internally provided with a mounting cavity, and two ends of the shell are respectively provided with an air inlet and an air outlet which are communicated with the mounting cavity;

the fan is arranged in the installation cavity, and the air inlet end of the fan is arranged opposite to the air inlet; and

the air distribution piece is arranged in the installation cavity, the air distribution piece is opposite to the air outlet end of the fan, an air passage is formed in the periphery of the air distribution piece, the air passage is communicated with the fan and the air outlet, an air guide part is arranged at one end of the air distribution piece, facing the fan, of the air distribution piece, and the air guide part is used for guiding air flow of the fan into the air passage.

Optionally, the cross-sectional area of the air guiding part gradually decreases in a direction approaching the fan.

Optionally, the surface of the wind guiding part facing the fan is configured as an arc surface, and the arc top of the arc surface is opposite to the axis of the fan.

Optionally, defining the height of the protrusion of the air guiding part as H, where H satisfies: h is more than or equal to 2mm and less than or equal to 10mm.

Optionally, an included angle between a surface of the air guiding part and a peripheral side wall of the flow dividing piece is defined as α, and the α satisfies: alpha is less than 180 DEG and 90 deg.

Optionally, the low noise blower further includes a wind scooper, the wind scooper is disposed between the blower and the wind guiding portion, a wind guiding flaring is provided in a penetrating manner in the middle of the wind scooper, and a sectional area of the wind guiding flaring is gradually increased from the blower to the wind passing channel.

Optionally, the wind scooper is further provided with a wind guiding blade, the wind guiding blade extends along the radial direction of the wind guiding flaring, and in the wind outlet direction of the fan, the wind guiding blade presents a shape with small two sides and large middle.

Optionally, the low-noise blower further comprises a blower bracket, the blower is mounted on the blower bracket, and the blower bracket and the air guide cover are integrally formed.

Optionally, the low noise blower further comprises a blower bracket, the blower is mounted on the blower bracket, and a gland is arranged on a side cover of the blower bracket, which faces the air inlet.

Optionally, the low noise hair-dryer still includes the vortex piece, the vortex piece is located the air intake, the air intake is equipped with first magnetic part, the vortex piece is provided with the second magnetic part, first magnetic part with second magnetic part magnetism is connected.

Optionally, the low noise blower further comprises a spoiler, the spoiler is arranged at the air inlet, the spoiler is provided with a rotatable impeller, and the rotation axis of the impeller is parallel to the central axis of the air inlet.

Optionally, the low noise blower further includes an air outlet cover, the air outlet cover includes a supporting part connected with the splitter and a connecting part connected with the casing, the supporting part with the connecting part is in the air outlet encloses to establish an air outlet ring mouth, the air outlet ring mouth communicate in the air outlet with the air passage in the air outlet direction of the low noise blower, the cross-sectional area of the air passage reduces gradually, the ring width of the air outlet ring mouth is configured as the minimum interval between the connecting part and the supporting part.

Optionally, the low noise hair-dryer still includes the air-out cover, the air-out cover include with the supporting part that the reposition of redundant personnel piece is connected and with the connecting portion that the casing is connected, the supporting part with connecting portion in the air outlet encloses to establish the air-out ring mouth, the air-out ring mouth communicate in the air outlet with the air passage, in the air-out ring mouth, connecting portion with the supporting part is connected with the wind-guiding muscle in the air-out direction of low noise hair-dryer, the wind-guiding muscle presents the big shape in the little middle part in both sides.

Optionally, the low noise blower further comprises a heating element, and the heating element is arranged around the periphery of the flow dividing element and is positioned in the air passage.

Optionally, the low-noise blower further comprises a filter screen, and the filter screen is arranged at the air inlet.

According to the technical scheme, the air flow guide part is arranged at the air outlet end of the fan, the air flow guide part is arranged at the periphery of the air flow guide part, and the air flow guide part is used for guiding the air flow blown out by the fan to the air flow guide part, so that the air flow is blown out from the air outlet.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Figure 1 is a cross-sectional view of one embodiment of a low noise blower of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an exploded view of one embodiment of a low noise blower of the present invention;

FIG. 4 is a schematic view of the structure of the fan housing and fan support of FIG. 3;

FIG. 5 is a schematic view of the air outlet cover in FIG. 3;

fig. 6 is a schematic structural view of the spoiler in fig. 3.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a low-noise blower.

In an embodiment of the present invention, referring to fig. 1 to 4, the low noise blower includes:

a housing 100, in which a mounting cavity is formed, and two ends of the housing 100 are respectively provided with an air inlet 120 and an air outlet 110 which are communicated with the mounting cavity;

the fan 200 is arranged in the mounting cavity, and the air inlet end of the fan 200 is arranged opposite to the air inlet 120; and

the flow dividing piece 300 is arranged in the mounting cavity, the flow dividing piece 300 is opposite to the air outlet end of the fan 200, an air passing channel 130 is formed in the periphery of the flow dividing piece 300, the air passing channel 130 is communicated with the fan 200 and the air outlet 110, an air guiding part 310 is arranged at one end, facing the fan 200, of the flow dividing piece 300, and the air guiding part 310 is used for guiding air flow of the fan 200 into the air passing channel 130.

According to the technical scheme, the air flow guide part 300 is arranged at the air outlet end of the fan 200, the air flow channel 130 is formed at the periphery of the air flow guide part 300, and the air flow blown out of the fan 200 is guided to the air flow channel 130 by the air flow guide part 310 of the air flow guide part 300, so that the air flow is blown out of the air outlet 110, in the running process of the fan 200, external air enters the fan 200 from the air inlet 120, is accelerated by the fan 200 and then is blown out of the air flow guide part 310 from the air outlet end of the fan 200, and part of the air flow is circumferentially split to the air flow channel 130 and is blown out of the air outlet 110 through the air flow channel 130.

The air inlet 120 and the air outlet 110 of the housing 100 may be separately disposed at two opposite ends of the housing 100, so that the air inlet direction and the air outlet direction of the low-noise blower are in the same straight line, or one of the air inlet 120 and the air outlet 110 is disposed at the circumference of the housing 100, and the other is disposed at the end of the housing 100, so that the air inlet direction and the air outlet direction of the low-noise blower are disposed at an included angle. It can be appreciated that the air inlet end and the air outlet end of the blower 200 are respectively opposite to the air inlet 120 and the air outlet 110, and the air passage 130 is disposed between the air outlet 110 and the air outlet end of the blower 200, specifically, the air guiding portion 310 may be configured as a cone, the top of which is configured as a pyramid or as a cone, or the air guiding portion 310 is configured as an arc-shaped air passage hole or air passage groove and extends from the air outlet 110 of the blower 200 to the air passage 130. It should be noted that, in the present embodiment, the cross section of the splitter 300 is larger than the cross section of the air outlet end of the fan 200, so that the air guiding portion 310 extends obliquely between the air passing channel 130 and the fan 200 to reduce the resistance of the splitter 300 to the airflow.

It should be noted that, the fan 200 is configured as a high-speed fan, and has a gear for outputting a high-speed air flow, and when the low-noise blower is started, the output power of the fan 200 is increased, so that the fan 200 blows out the high-speed air flow, or the output power of the fan 200 is reduced, so that the fan 200 blows out the air flow with a low air speed, thereby being capable of meeting the use requirement of a user.

In an embodiment, referring to fig. 1 and 2, the cross-sectional area of the air guiding portion 310 gradually decreases in a direction approaching the fan 200. In this way, in the process of air outlet of the blower 200, the area of the air flow colliding with the air guiding part 310 is small and then large, and the surface of the air guiding part 310 extends obliquely between the air passing channel 130 and the blower 200, so that the resistance of the air guiding part 310 to the air flow is reduced while the air flow direction is gradually changed, and the noise generated in the blowing process of the low-noise blower is further reduced. The end of the air guiding portion 310 facing the fan 200 may be disposed at a taper angle, or may be disposed at an arc top, where the arc top or the taper angle may be opposite to the central axis of the fan 200, or may be disposed parallel to the central axis of the fan 200.

Further, in the present embodiment, referring to fig. 1 and 2, the surface of the air guiding portion 310 facing the fan 200 is configured as an arc surface, and the arc top of the arc surface is opposite to the axis of the fan 200. It can be appreciated that the pressure of the air flow near the side of the arc surface is lower, so that the air flow can be attached to the arc surface to flow, and in the process of flowing on the arc surface, the resistance of the air flow is smaller, so that the blocking effect of the air guiding part 310 on the air flow can be reduced, and the air speed of the air flow when blown out from the air outlet 110 is ensured. And the arc top of the arc surface is axially opposite to the axis of the fan 200, so that the air flow of the fan 200 is uniformly distributed to the air-passing channel 130, and the uniformity of air outlet 110 is ensured.

Specifically, in the present embodiment, please continue to refer to fig. 1 and 2, the protrusion height of the air guiding portion 310 is defined as H, where H satisfies: h is more than or equal to 2mm and less than or equal to 10mm. It can be understood that controlling the size of H is equivalent to controlling the curvature and the inclination of the cambered surface of the air guiding portion 310, that is, the resistance of the air flow on the air guiding portion 310 is different corresponding to the different sizes of H, which is expressed as that the resistance of the air flow on the air guiding portion 310 is inversely related to H. Thus, when the size of H is between 2mm and 10mm, the flow speed of the air flow on the air guiding portion 310 is guaranteed, and the air flow is stably and effectively guided to the air passing channel 130, so that the noise of the low-noise blower is reduced. At H less than 2mm, the surface of the air guide 310 is nearly perpendicular to the plane, and the resistance of the air flow on the air guide 310 is large, resulting in a low-noise blower with low wind speed and high noise. When H is greater than 10mm, the axial length occupied by the air guiding portion 310 is too large, which increases the distance from the fan 200 to the air passing channel 130, and easily weakens the wind speed at the air outlet 110, so as to affect the user experience. Specifically, H may be set to 2mm, 4mm, 5mm, 8mm, or the like.

Similarly, in the present embodiment, please continue to refer to fig. 1 and 2, the included angle between the surface of the air guiding portion 310 and the peripheral sidewall of the splitter 300 is defined as α, and α satisfies: alpha is less than 180 DEG and 90 deg. It will be appreciated that the surface of the air guide 310 is inclined between the axial and radial directions, i.e., the surface of the air guide 310 extends obliquely between the blower 200 and the air passage 130 to guide the air flow of the blower 200 into the air passage 130, reducing the resistance of the air flow on the splitter 300, and thus reducing the noise of the low noise blower. Specifically, in the present embodiment, the surface of the air guiding portion 310 is configured as a convex arc surface, the flow velocity of the air flow on the convex arc surface is gradually reduced, and the resistance received is also gradually reduced, so that the rate of change of the air flow velocity can be effectively controlled to ensure the wind speed of the air outlet 110. When α is less than or equal to 90 °, the airflow will collide with the surface of the air guiding portion 310 in the axial direction, resulting in greater wind resistance and noise, and when α is greater than or equal to 180 °, the surface of the air guiding portion 310 is not disposed obliquely between the air passing channel 130 and the fan 200, so that the airflow of the fan 200 cannot be guided into the air passing channel 130, which is not beneficial to regulating and controlling the speed of the low noise blower. Specifically, in the present embodiment, α may be set to 120 °, 145 °, 150 °, or the like

In an embodiment, referring to fig. 1 to 4, the low noise blower further includes a wind scooper 400, the wind scooper 400 is disposed between the blower 200 and the wind guiding portion 310, a wind guiding flare 410 is formed in the middle of the wind scooper 400, and a cross-sectional area of the wind guiding flare 410 gradually increases from the blower 200 to the wind passing channel 130. It can be appreciated that the airflow of the fan 200 enters the air guiding flaring 410 after leaving the fan 200, and the air guiding flaring 410 gradually increases towards the air passing channel 130 to weaken the pressure of the airflow, so that the airflow is easy to overflow outwards Zhou San, and thus, the airflow can be easily guided into the air passing channel 130 by combining the guiding function of the air guiding part 310, thereby not only guaranteeing the wind speed, but also reducing the noise generated by the collision of the airflow and the splitter 300. Specifically, the cross-section of the side of the wind-guiding flare 410 near the wind-passing channel 130 is larger than the cross-section of the flow splitter 300 so that the air flow can flow directly into the wind-passing channel 130 along the peripheral wall of the wind-guiding flare 410. Of course, in other embodiments, the air guiding cover 400 may also be provided with a drainage through hole, and the drainage through hole extends obliquely from the air outlet end of the fan 200 toward the air passage 130, so as to smoothly drain the air flow into the air passage 130, and reduce the noise of the low-noise blower in this scheme.

Further, in the present embodiment, referring to fig. 2 and 4, the air guiding cover 400 is further provided with air guiding blades 420, the air guiding blades 420 extend along the radial direction of the air guiding flares 410, and in the air outlet direction of the fan 200, the air guiding blades 420 have a shape with small sides and large middle. It can be appreciated that the air guide blade 420 can avoid the vortex phenomenon of the air flow, ensure that the air flow can stably flow from the fan 200 to the air-passing channel 130 and then flow out from the air outlet 110, wherein the air outlet direction of the fan 200 is the axial direction of the low-noise blower, that is, the sectional area of the air guide blade 420 gradually decreases from the middle to the opposite sides in the axial direction. In this way, in the process that the air flow is abutted against the air guide blade 420, the air flow contacts the part with the small section firstly, and then contacts the part with the large section gradually, so that the air flow guiding function of the air guide blade 420 is guaranteed, the resistance of the air guide blade 420 to the air flow is reduced, and the flow speed of the air flow is guaranteed. Similarly, in the process that the air flow leaves the air guide blade 420, the air flow can be gradually separated from the air guide blade 420, and the phenomenon of vortex caused by vacuum after the air flow is separated from the air guide blade 420 is avoided. Of course, in other embodiments, the cross-section of the wind guide blade 420 in the direction approaching the splitter 300 or the blower 200 is gradually reduced.

Specifically, in the present embodiment, please continue to refer to fig. 2 and 4, the side of the air guide vane 420 facing the splitter 300 or the fan 200 is provided with the first convex corner 421, the convex height of the first convex corner 421 is configured to be between 0.5mm and 5mm, and the width of the first convex corner 421 in the circumferential direction is configured to be between 0.8mm and 5mm, so that the splitting effect of the air guide vane 420 on the air flow is ensured, and the resistance of the air guide vane 420 on the air flow is also reduced. When the height of the protrusion of the first convex corner 421 is less than 0.5mm, the resistance of the air guide blade 420 to the air flow is large, which is not beneficial to the air outlet smoothness of the low-noise blower, and when the height of the protrusion of the first convex corner 421 is greater than 5mm, the length of the first convex corner 421 in the axial direction is too long, the flow dividing effect to the air flow is not obvious, and the flow dividing is not beneficial. Similarly, when the width of the first lobe 421 in the circumferential direction is smaller than 0.8mm, the thickness of the air guide blade 420 is too small, which is not beneficial to splitting the air flow, and when the width of the first lobe 421 in the circumferential direction is larger than 5mm, the collision surface between the air guide blade 420 and the air flow is larger, which results in too large resistance to the air flow and is not beneficial to the air outlet of the low-noise blower. Specifically, the protrusion height of first lobe 421 may be set to 0.5mm, 2mm, 3.5mm, or 5mm, and the width of first lobe 421 in the circumferential direction may be set to 0.8mm, 1.5mm, 3mm, or 5mm. First lobe 421 may be configured as a pyramid or as a cone.

Further, in the present embodiment, referring to fig. 4, the low noise blower further includes a blower 200 bracket 500, the blower 200 is mounted on the blower 200 bracket 500, and the blower 200 bracket 500 and the air guiding cover 400 are integrally formed. Thus, under the blowing of the fan 200, the stability of the wind scooper 400 can be ensured, so that the vortex phenomenon of the airflow is effectively avoided. In addition, the fan 200 bracket 500 and the air guide cover 400 are integrally formed, so that the installation procedure of the low-noise blower is reduced, and the assembly efficiency of the low-noise blower is improved. Of course, in other embodiments, the fan 200 bracket 500 and the air guiding cover 400 may be formed separately and connected by clamping, screwing, or the like.

Similarly, in the present embodiment, referring to fig. 3 and 4, a cover 600 is provided on a side of the fan 200 bracket 500 facing the air inlet 120. It can be appreciated that the fan 200 is installed in the fan 200 bracket 500 from the air inlet direction of the air inlet 120, after the fan 200 is placed in the fan 200 bracket 500, the gland 600 is covered on the end portion of the fan 200 bracket 500 facing the air inlet 120, i.e. the fan 200 is stably installed in the fan 200 bracket 500, so that the stability of the fan 200 is ensured, and meanwhile, the installation convenience of the fan 200 is also improved. Specifically, the gland 600 may be fastened to the end of the fan 200 support 500 facing the air inlet 120 in a screwed manner, and the gland 600 is annular and abuts against the outer peripheral shell of the fan 200, so as to avoid interference with air intake of the fan 200. Of course, in other embodiments, a clamping or screwing structure may be provided on the fan 200 support 500, so that the fan 200 is clamped or screwed in the fan 200 support 500.

In an embodiment, referring to fig. 3 and 6, the low noise blower further includes a spoiler 700, the spoiler 700 is disposed at the air inlet 120, the air inlet 120 is provided with a first magnetic member 140, the spoiler 700 is provided with a second magnetic member 710, and the first magnetic member 140 is magnetically connected with the second magnetic member 710. It can be understood that the magnetic attraction relationship between the first magnetic member 140 and the second magnetic member 710 of the copper tank post, the spoiler 700 is mounted on the housing 100 in a magnetic attraction manner, so that the stability of the spoiler 700 on the low-noise blower is ensured, and the spoiler 700 is convenient to disassemble and assemble to clean and maintain the components on the air inlet 120. Specifically, the first magnetic member 140 is configured as an iron ring and is clamped in the circumferential direction of the air inlet 120, the second magnetic member 710 is configured as a magnet, and has two magnets distributed along the radial direction, the iron boxing avoids affecting the air inlet of the air inlet 120, and the two magnets also effectively ensure the stability of the spoiler 700 on the housing 100. Of course, in other embodiments, the spoiler 700 may be mounted to the air inlet 120 by a fastening or screwing manner.

Also, in the present embodiment, the spoiler 700 is provided with a rotatable impeller, and the rotation axis of the impeller is disposed parallel to the central axis of the air intake 120. In this way, in the operation process of the low-noise blower, the air flow on the air inlet 120 drives the impeller to rotate, so that the air flow enters the blower 200 at a uniform flow speed for acceleration, and the uniformity and continuity of the air outlet of the blower 200 are ensured, thereby improving the flow-around effect of the spoiler 700. Specifically, the middle part of the spoiler 700 is connected to the inner wall of the installation cavity through a radial bracket, so as to ensure that the spoiler 700 can stably rotate. Of course, in other implementations, a rotatable impeller may be provided at the air intake end of the blower 200, or the spoiler 700 may be provided with a non-rotatable impeller.

In an embodiment, referring to fig. 3 and 5, the low noise blower further includes an air outlet cover 800, the air outlet cover 800 includes a supporting portion 810 connected with the splitter 300 and a connecting portion 820 connected with the housing 100, the supporting portion 810 and the connecting portion 820 enclose an air outlet ring opening 830 at the air outlet 110, the air outlet ring opening 830 is communicated with the air outlet 110 and the air outlet channel 130, and in the air outlet direction of the low noise blower, the cross-sectional area of the air outlet channel 130 is gradually reduced, and the ring width of the air outlet ring opening 830 is configured as the minimum distance between the connecting portion 820 and the supporting portion 810. In this way, in the air outlet process of the low-noise blower, the pressure of the air flow entering the air passage 130 from the blower 200 is firstly reduced, and in the process that the air passage 130 flows to the air outlet through the air ring opening 830, the pressure of the air flow is reduced after being increased, so that the wind speed and the flow of the air flow are improved, the influence of the flow splitting of the splitter 300 on the wind speed is weakened, and the use experience of a user is ensured. In addition, the air-passing ring opening 830 is in an annular shape, the coverage area of the air flow from the air outlet 110 is wide, the air flow is evenly dispersed, soft air flow is brought to the user, and the use experience of the user is improved.

Further, in the present embodiment, please continue to refer to fig. 3 and 5, in the air ring opening 830, the connecting portion 820 and the supporting portion 810 are connected with the air guiding rib 840, and in the air outlet direction of the low noise blower, the air guiding rib 840 presents a shape with two sides small and a large middle. It can be appreciated that the air guide rib 840 can avoid the vortex phenomenon of the air flow at the air outlet 110, and ensure that the air flow can stably flow out from the air outlet 110, wherein the air outlet direction of the low-noise blower is the axial direction of the low-noise blower, that is, the sectional area of the air guide rib 840 gradually decreases from the middle to the opposite sides in the axial direction. In this way, in the process that the air flow is abutted against the air guide rib 840, the air flow contacts the part with the small section firstly, then contacts the part with the large section gradually, so that the air flow guiding function of the air guide rib 840 is guaranteed, the resistance of the air guide rib 840 to the air flow is reduced, and the flow speed of the air flow is guaranteed. Similarly, in the process that the air flow leaves the air guide rib 840, the air flow gradually breaks away from the air guide rib 840, and the phenomenon of vortex caused by vacuum after the air flow breaks away from the air guide rib 840 is avoided. Of course, in other embodiments, the cross-section of the air bead 840 tapers on axially opposite sides of the extension.

Specifically, in the present embodiment, please continue to refer to fig. 3 and 5, the wind-guiding rib 840 is provided with the second convex angle 841 at both sides inside and outside the wind-passing ring opening 830, the height of the protrusion of the second convex angle 841 is configured to be between 0.5mm and 5mm, and the width of the second convex angle 841 in the circumferential direction is configured to be between 0.8mm and 5mm, so that the flow-dividing effect of the wind-guiding rib 840 on the air flow is ensured, and the resistance of the wind-guiding rib 840 on the air flow is also reduced. When the height of the protrusion of the second convex angle 841 is smaller than 0.5mm, the resistance of the wind guide rib 840 to the air flow is larger, which is not beneficial to the air-out smoothness of the low-noise blower, and when the height of the protrusion of the second convex angle 841 is larger than 5mm, the axial length of the second convex angle 841 is too long, so that the axial length of the overwind ring opening 830 is too large, and the air-out effect of the low-noise blower is affected. Similarly, when the width of the second convex angle 841 in the circumferential direction is smaller than 0.8mm, the thickness of the air guide rib 840 is too small, which is not beneficial to splitting the air flow, and when the width of the second convex angle 841 in the circumferential direction is larger than 5mm, the collision surface of the air guide rib 840 and the air flow is larger, which results in overlarge resistance to the air flow and is not beneficial to the air outlet of the low-noise blower. Specifically, the protrusion height of the second lobe 841 may be set to 0.5mm, 2mm, 3.5mm, or 5mm, and the width of the second lobe 841 in the circumferential direction may be set to 0.8mm, 1.5mm, 3mm, or 5mm. Wherein the second lobes 841 may be configured as pyramids or as cones.

In an embodiment, referring to fig. 1 to 3, the low noise blower further includes a heat generating element 900, and the heat generating element 900 is disposed around the periphery of the splitter 300 and is located in the air passage 130. In this way, the air flow exchanges heat with the heat generating element 900 in the air passage 130, so that the low-noise blower can blow out air flows with different temperatures, and the heat exchange efficiency of the heat generating element 900 and the air flow is improved. Without losing generality, the periphery of the flow dividing piece 300 is provided with convex ribs, the convex ribs are provided with clamping slots 320, the heating piece 900 is provided with a plurality of inserting pieces distributed in the circumferential direction, the inserting pieces are clamped in the clamping slots 320, the stability of the heating piece 900 on the periphery of the flow dividing piece 300 is guaranteed, and the installation convenience of the heating piece 900 is improved. Of course, in other embodiments, the heat generating element 900 may be configured as a radiation lamp and disposed in the shunt 300, where the shunt 300 has good thermal conductivity, or the heat generating element 900 is disposed between the fan 200 and the shunt 300, or the heat generating element 900 may be mounted on the outer periphery of the shunt 300 by a screw connection.

In an embodiment, referring to fig. 3 and 6, the low noise blower further includes a filter 150, and the filter 150 is disposed at the air inlet 120. It can be appreciated that the filter screen 150 can filter impurities of external air, ensure the purity of air flow blown by the low-noise blower, and prevent the external objects from entering the blower 200 due to pressure difference, thereby damaging the blower 200. In addition, the filter screen 150 can also form a certain flow-around effect on the air flow, so that the air flow entering the fan 200 is more uniform, and the uniformity and the continuity of the air outlet of the low-noise blower are ensured.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the present invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (10)

1. A low noise blower, comprising:

the shell is internally provided with a mounting cavity, and two ends of the shell are respectively provided with an air inlet and an air outlet which are communicated with the mounting cavity;

the fan is arranged in the installation cavity, and the air inlet end of the fan is arranged opposite to the air inlet; and

the air distribution piece is arranged in the installation cavity, the air distribution piece is opposite to the air outlet end of the fan, an air passage is formed in the periphery of the air distribution piece, the air passage is communicated with the fan and the air outlet, an air guide part is arranged at one end of the air distribution piece, facing the fan, of the air distribution piece, and the air guide part is used for guiding air flow of the fan into the air passage.

2. The low noise blower of claim 1, wherein a cross-sectional area of said air guide portion is gradually reduced in a direction approaching said blower.

3. The low noise blower of claim 2, wherein a surface of said air guiding portion facing said blower is configured as an arc surface, and an arc top of said arc surface is disposed opposite to an axis of said blower.

4. The low noise blower of claim 2, wherein a height of a protrusion defining said air guide is H, said H satisfying: h is more than or equal to 2mm and less than or equal to 10mm;

and/or, defining an included angle between the surface of the air guide part and the peripheral side wall of the flow dividing piece as alpha, wherein the alpha satisfies the following conditions: alpha is less than 180 DEG and 90 deg.

5. The low noise blower of claim 1, further comprising a wind scooper disposed between said blower and said wind guiding portion, wherein a wind guiding flare is provided through a middle portion of said wind scooper, and a cross-sectional area of said wind guiding flare increases gradually from said blower to said wind passing channel.

6. The low noise blower of claim 5, wherein said air guiding cover is further provided with air guiding blades, said air guiding blades extend along the radial direction of said air guiding flares, and said air guiding blades have a shape with small sides and large middle parts in the air outlet direction of said blower.

7. The low noise blower of claim 5, further comprising a blower bracket, said blower being mounted to said blower bracket;

the fan bracket and the air guide cover are integrally formed;

and/or a gland is arranged on the side cover, facing the air inlet, of the fan bracket.

8. The low noise blower of any one of claims 1-7, further comprising a spoiler disposed at said air intake;

the air inlet is provided with a first magnetic piece, the turbulence piece is provided with a second magnetic piece, and the first magnetic piece is magnetically connected with the second magnetic piece;

and/or the turbulence piece is provided with a rotatable impeller, and the rotation axis of the impeller is parallel to the central shaft of the air inlet.

9. The low noise blower of any one of claims 1-7, further comprising an air outlet cover comprising a support portion connected to the splitter and a connection portion connected to the housing, the support portion and the connection portion surrounding an air outlet ring opening at the air outlet, the air outlet ring opening being in communication with the air outlet and the air passage;

in the air outlet direction of the low-noise blower, the cross section area of the air passage is gradually reduced, and the annular width of the air passage annular opening is configured as the minimum distance between the connecting part and the supporting part;

and/or, in the air passing ring opening, the connecting part and the supporting part are connected with air guide ribs, and in the air outlet direction of the low-noise blower, the air guide ribs are in a shape with small two sides and large middle part.

10. The low noise blower of any one of claims 1 to 7, further comprising a heat generating member disposed around the periphery of the flow dividing member and located in the air passage;

and/or, the low-noise blower further comprises a filter screen, and the filter screen is arranged at the air inlet.