CN118066133A

CN118066133A - Garden blower

Info

Publication number: CN118066133A
Application number: CN202410363917.1A
Authority: CN
Inventors: 谢作杰; 刘国民; 张晴; 吴佳旋; 郭江杰; 刘文彬; 张�杰; 李鹏
Original assignee: Zhejiang Baima Technology Co ltd
Current assignee: Zhejiang Baima Technology Co ltd
Priority date: 2024-03-28
Filing date: 2024-03-28
Publication date: 2024-05-24

Abstract

The present invention provides a garden blower, comprising: the main air duct component is provided with a main air duct which is suitable for airflow to flow along the air inlet end to the air outlet end, and a containing cavity is formed between the main air duct component and the casing; the motor fan blade component is arranged in the main air path component; the circuit board is electrically connected with the motor fan blade assembly; wherein the circuit board or the controller is embedded and arranged in the wall body of the main wind path component; wherein a surface of the circuit board or the controller is at least partially exposed in the main air duct, configured to form a portion of a wall of the main air duct member; under the rotating action of the motor fan blade component, air flow enters the main air path component along the air inlet end to form a main air path, and the main air path sweeps over the surface of the circuit board exposed in the main air path to radiate heat of the circuit board and flow to the air outlet end. According to the technical scheme, the air cooling system of the equipment is fully utilized, and effective heat dissipation of the circuit board or the controller is realized.

Description

Garden blower

Technical Field

The invention relates to a garden blower, and belongs to the field of garden electric tools.

Background

The blower is a common garden electric tool, and is mainly used for cleaning fallen leaves, grass scraps, pavement dust, snow and the like by utilizing air flow. When the electric blower is operated, the electronics on the controller (circuit board) for controlling the motor generate heat, resulting in a rapid rise in temperature of the controller (circuit board) and its surroundings. If the heat is not timely dissipated, the electronic device can fail due to overheating. To prevent heat from damaging the electronic device, a heat dissipation mechanism needs to be provided for the controller (circuit board).

In the prior art CN205423243U (publication day: 2016-08-03), a blower is disclosed, which sets a controller in an air inlet channel, so that a great amount of heat generated on the controller is taken away by the air flowing through the air inlet channel, so that the heat dissipation effect of the controller is better, and further the service life of the blower is prolonged, but the controller inevitably forms a barrier to the smoothness of the air channel of the air inlet channel, the air flow in the air inlet channel can impact the controller, the air flow is converted into a turbulent state from the original laminar state, and the resistance loss of the air channel system is increased.

The prior art CN106284152a (publication day: 2017-01-04) discloses a blower, which is provided with a heat dissipation air flow outlet at a containing portion of a controller, when a fan rotates, air flow in the containing portion flows through the heat dissipation air flow outlet and then enters an air duct, and the blower has reasonable structure and good heat dissipation effect, but the heat dissipation air flow outlet is inevitably required to be additionally provided on a machine shell, and in order to achieve better heat dissipation effect, a heat dissipation air flow inlet is sometimes required to be provided.

The prior art CN208577990U (publication day: 2019-03-05) discloses a blower, wherein a circuit board is positioned at the lower side of an air flow channel, and the blower also has the technical problem that a heat dissipation air flow outlet and a heat dissipation air flow inlet are additionally arranged on a machine shell;

The prior art CN212318316U (publication: 2021-01-08) discloses a blower which is still configured as a separate air passage for cooling, and requires additional provision of a heat dissipating air flow outlet and a heat dissipating air flow inlet to the cabinet.

The prior art CN114876827a (publication: 2022-08-09) discloses a blower, in which the control unit is at least partially located in the air duct, so that when the blower works, at least a portion of the air flow entering the air inlet dissipates heat from the control unit and is then discharged through the air outlet, but this solution has a high requirement on the integration level of the controller, the motor needs to use a non-fully enclosed motor housing, and considering that the cooling air flow will mix with the main air flow after leaving the conical current-guiding body, so the cooling air flow should be avoided from interfering with the main air flow as much as possible when designing the shape and arrangement of the opening, the overall structure is complex, and the difficulty of design and development is high.

As such, technical improvements are needed for the heat dissipation process for the controller in the blower.

Disclosure of Invention

The invention aims to provide the garden blower which has a simple structure and good heat dissipation effect, and does not need to be provided with an independent air channel for heat dissipation of a circuit board or a controller.

The present invention provides a garden blower, comprising:

The shell is provided with an air inlet end and an air outlet end;

a main air path component, which is formed with a main air path suitable for air flow to flow along the air inlet end to the air outlet end, and a containing cavity is formed between the main air path component and the casing;

the motor fan blade assembly is arranged in the main air path component;

The circuit board is electrically connected with the motor fan blade assembly;

The circuit board is embedded and installed in the wall body of the main air path component; wherein,

A surface of the circuit board is at least partially exposed in the main air duct, and is configured to form a part of the wall of the main air duct member;

Under the rotating action of the motor fan blade assembly, air flow enters the main air path component along the air inlet end to form the main air path, and the main air path sweeps over the surface of the circuit board exposed in the main air path to radiate heat of the circuit board and flow towards the air outlet end.

Further, a surface of the circuit board exposed in the main air duct is engaged with an inner surface of the wall of the main air duct member.

Further, the circuit board comprises a mos element, the mos element is arranged on one surface of the circuit board facing the main air path and is exposed in the main air path, and the main air path sweeps over the mos element to radiate heat.

Further, the circuit board is disposed upstream of the motor fan assembly and is configured to form a portion of a wall of the air intake cavity of the main air path member.

Further, the caliber of the air inlet cavity is gradually reduced along the flow direction of the main air path, and the surface of the circuit board is at least partially visible when the circuit board is observed from the front and rear view direction of the garden blower.

Further, the main air path component comprises a duct assembly and a rear shell for forming an air inlet cavity, wherein the duct assembly comprises an outer duct and a motor fan blade assembly arranged in the outer duct;

The rear shell and the outer duct are arranged at annular intervals, so that a negative pressure inlet communicated with the accommodating cavity is formed between the outer duct and the rear shell;

under the rotating action of the motor fan blade component, air flows from the accommodating cavity to the negative pressure inlet to form an auxiliary heat dissipation air path, and enters the main air path through the negative pressure inlet.

Further, an opening is formed in the wall body of the main air path component, corresponding to the circuit board, and the circuit board is correspondingly positioned and installed in the opening, so that the surface of the circuit board seals the opening and forms a part of the wall body of the main air path component.

Compared with the prior art, the garden blower provided by the invention has the beneficial technical effects that:

In the design of this garden blower, the surface portion of the circuit board is skillfully placed in the main air path. When the blower is started to run, the fan blade assembly driven by the motor rotates at a high speed, the air flow is guided to continuously flow into the main air path structure through the air inlet end, the main air path directly sweeps the exposed part of the surface of the circuit board by the strong air flow, high-efficiency heat exchange is realized, and heat generated by the circuit board during working is immediately and effectively conducted and discharged to the air outlet end along the main air path. Due to the design, the product does not need to be additionally provided with an independent air heat dissipation channel or set up a special heat dissipation air flow inlet and outlet, and the problem of insufficient heat dissipation possibly caused by limited air flow of the air channel in the prior art is perfectly solved.

In addition, the circuit board is integrated in the wall body structure of the main air path component, so that the main air path can be smoothly close to and penetrate through the surface of the circuit board in the smooth running process, thereby avoiding any obstruction to the air flow of the main air path, greatly simplifying the whole structure and improving the implementation convenience and feasibility. Therefore, the air cooling system of the equipment is fully utilized to realize effective heat dissipation of the circuit board, and the optimization and stability of the overall performance of the blower are ensured.

In addition, the main air path directly sweeps the exposed part of the surface of the circuit board by strong air flow, so that efficient heat exchange is realized, a radiator is not required to be provided for the circuit board, the weight of the blower is further reduced, and the fatigue feeling of a user during long-time holding of the blower is reduced.

Another garden blower provided by the present invention includes:

The shell is provided with an air inlet end and an air outlet end;

The main air path component comprises a duct assembly, and is provided with a main air path which is suitable for airflow to flow along the air inlet end to the air outlet end, and a containing cavity is formed between the main air path component and the casing; the duct assembly comprises an outer duct and a motor fan blade assembly arranged in the outer duct;

the controller is electrically connected with the motor fan blade assembly and comprises a circuit board and a radiator connected with the circuit board;

The controller is embedded in the wall body of the main wind path component and is positioned at the upstream of the motor fan blade component; wherein,

The heat dissipation outer surface of the heat radiator is at least partially exposed in the main air passage and is configured to form a part of a wall body of an air inlet cavity of the main air passage component;

under the rotating action of the motor fan blade component, air flow enters the air inlet cavity along the air inlet end to form the main air path, and the main air path sweeps over the heat radiation outer surface of the radiator to enter the duct component and flows towards the air outlet end.

Further, the caliber of the air inlet cavity is gradually reduced along the flow direction of the main air path, and the heat dissipation outer surface of the radiator is at least partially visible when the garden blower is observed from the front and rear view directions.

Further, the controller is obliquely arranged along the extending direction of the wall body of the main air path component.

Further, the main air path component further comprises a rear shell used for forming an air inlet cavity, and the rear shell and the outer duct are annularly arranged at intervals, so that a negative pressure inlet communicated with the accommodating cavity is formed between the outer duct and the rear shell;

Further, an opening is formed in the wall body of the main air path component, corresponding to the controller, and the wall body of the main air path component protrudes upwards along the edge of the opening to form a positioning frame, and the controller is correspondingly arranged on the positioning frame, so that the heat dissipation outer surface of the controller seals the opening and forms a part of the inner wall of the air inlet cavity.

Further, the heat dissipation outer surface of the controller does not completely block the opening, and a small gap is arranged between the controller and the opening and between the controller and the positioning frame.

In this garden blower design, the circuit board is configured with a heat sink with a surface portion of the heat sink disposed in the primary air path. When the blower is started to run, the fan blade assembly driven by the motor rotates at a high speed, the air flow is guided to continuously flow into the main air path structure through the air inlet end, and the main air path directly passes through the exposed part of the surface of the radiator by the strong air flow, so that efficient heat exchange is realized. Due to the design, the product does not need to be additionally provided with an independent air heat dissipation channel or set up a special heat dissipation air flow inlet and outlet, and the problem of insufficient heat dissipation possibly caused by limited air flow of the air channel in the prior art is perfectly solved.

In addition, the radiator is integrated in the wall body structure of the main air path component, so that the main air path can be smoothly close to and penetrate through the surface of the radiator in the smooth running process, the air flow of the main air path is prevented from being blocked, the whole structure is greatly simplified, and the implementation convenience and feasibility are improved. Therefore, the air cooling system of the equipment is fully utilized to realize effective heat dissipation of the controller, and the optimization and stability of the overall performance of the blower are ensured.

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 needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1: a schematic structural diagram of an embodiment of the present invention;

Fig. 2: the invention is a partially enlarged schematic illustration of FIG. 1A;

Fig. 3: a front-rear view of an embodiment of the invention;

Fig. 4: a structural explosion schematic diagram of an embodiment of the invention;

fig. 5: a schematic cross-sectional view of an embodiment of the present invention;

Fig. 6: a second structure schematic diagram of the embodiment of the invention;

fig. 7: FIG. 6 is an enlarged schematic view of part B of the present invention;

fig. 8: a second front-rear view of the embodiment of the invention;

Fig. 9: a second embodiment of the invention is a structural explosion schematic;

Fig. 10: a second transverse cross-sectional schematic of an embodiment of the present invention;

fig. 11: fig. 10 is an isometric schematic drawing.

A garden blower 100; a housing 10; an air inlet end 101; an air outlet end 102; a main air path member 200; a main air path 300; a receiving chamber 70; a motor fan blade assembly 202; a circuit board 90; a rear housing 10a; holding the casing 10b; grip handle 10b1; mos element 90a; an air intake chamber 400; a bypass assembly 20; an outer duct 201; a negative pressure inlet S; an opening 90L; a controller 80; a heat sink 60; a heat radiation fin 60a; opening 80L.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.

[ Embodiment one ]

Referring to fig. 1 and 2, the present invention provides a garden blower 100, comprising:

A housing 10 having an air inlet end 101 and an air outlet end 102;

A main air path member 200 formed with a main air path 300 adapted for air flow along the air inlet end 101 to the air outlet end 102, and a receiving chamber 70 formed between the main air path member 200 and the casing 10;

a motor fan blade assembly 202 disposed within the main air path member 200;

a circuit board 90 electrically connected to the motor blade assembly 202;

The circuit board 90 is embedded and installed in the wall body of the main wind path component 200; wherein,

The surface of the circuit board 90 is at least partially exposed in the main air duct 300, and is configured to be formed as a part of the wall of the main air duct member 200;

Under the rotation of the motor blade assembly 202, air flows into the main air path component 200 along the air inlet end 101 to form a main air path 300, and the main air path 300 sweeps over the surface of the circuit board 90 exposed in the main air path 300 to dissipate heat of the circuit board 90 and flows towards the air outlet end 102.

The housing 10 is formed by combining at least a rear housing 10a and a holding housing 10b, wherein an air inlet end 101 is formed at the rear end of the rear housing 10a, and the holding housing 10b has a holding handle 10b1 for being held by a user. The user holds the handle 10b1 by hand, actuates the trigger switch, the garden blower 100 receives power to start operation, the fan blades of the motor fan blade assembly 202 start rotating under the driving of the motor, and under the rotating action of the motor fan blade assembly 202, air flows from the air inlet end 101, passes through the main air path component 200, and flows to the air outlet end 102 at a high speed.

Referring to fig. 5, in the design of this garden blower 100, the surface portion of the circuit board 90 is skillfully positioned in the path of the main air path 300. When the blower is started to operate, the fan blade assembly driven by the motor rotates at a high speed, and guides the air flow to continuously flow into the main air path component 200 through the air inlet end 101, and the main air path 300 directly sweeps the exposed part of the surface of the circuit board 90 by the strong air flow, so that efficient heat exchange is realized, and heat generated when the circuit board 90 works is immediately and effectively conducted and discharged to the air outlet end 102 along the main air path 300. Due to the design, the product does not need to be additionally provided with an independent air heat dissipation channel or set up a special heat dissipation air flow inlet and outlet, and the problem of insufficient heat dissipation possibly caused by limited air flow of the air channel in the prior art is perfectly solved.

Among these, it is preferable that the surface of the circuit board 90 exposed in the main air duct 300 is engaged with the inner surface of the wall body of the main air duct member 200. Thus, the circuit board 90 is integrated in the wall structure of the main air duct member 200, so that the main air duct 300 can be smoothly close to and pass through the surface of the circuit board in the smooth running process, thereby avoiding any obstruction to the air flow of the main air duct 300, greatly simplifying the overall structure and improving the implementation convenience and feasibility. Therefore, the air cooling system of the equipment is fully utilized to realize effective heat dissipation of the circuit board, and the optimization and stability of the overall performance of the blower are ensured.

In addition, the main air path 300 directly sweeps the exposed part of the surface of the circuit board by strong air flow, so that efficient heat exchange is realized, and a radiator is not required to be provided for the circuit board, so that the weight of the blower is reduced, and the fatigue feeling of a user during long-time holding of the blower is reduced.

Further, as shown in fig. 1, the circuit board 90 includes a mos device 90a disposed on a side of the circuit board 90 facing the main air duct 300, and exposed to the main air duct 300, and the main air duct 300 sweeps over the mos device 90a to dissipate heat.

As is well known, the mos device 90a is a main heat source when the circuit board 90 works, and the mos device 90a is disposed on the surface of the circuit board 90 facing the main air duct 300 and is exposed in the main air duct 300, so that the heat dissipation effect of the circuit board 90 is better.

In addition, with continued reference to FIG. 1, and in conjunction with FIG. 3, the circuit board 90 is disposed upstream of the motor fan assembly 202 and is configured to form a portion of the wall of the air intake cavity 400 of the main air duct member 200. Wherein the aperture size of the air inlet cavity 400 gradually decreases along the flow direction of the main air path 300, and the surface of the circuit board 90 is at least partially visible when the garden blower 100 is seen from the front and rear view directions. The inlet end of the air inlet cavity 400 is large, the outlet end is small, the sufficient air inlet quantity and air speed can be ensured, and the blowing performance of the garden blower 100 is ensured.

In addition, with continued reference to fig. 1 and 2, the main wind path component 200 includes a duct assembly 20 and a rear housing 10a for forming an air intake cavity 400, wherein the duct assembly 20 includes an outer duct 201 and a motor fan blade assembly 202 disposed within the outer duct 201;

The rear housing 10a and the outer duct 201 are arranged at annular intervals, so that a negative pressure inlet S communicated with the accommodating cavity 70 is formed between the outer duct 201 and the rear housing 10 a;

Under the rotation of the motor blade assembly 202, the air flows from the accommodating cavity 70 to the negative pressure inlet S, forming an auxiliary heat dissipation air path, and enters the main air path 300 through the negative pressure inlet S.

The outer duct 201 is disposed at an annular interval from the rear casing 10a of the casing 10, preferably at an annular interval of 1mm to 2mm, more preferably at an annular interval distance of 1.5mm, for example, the annular diameter of the rear casing 10a is 99.4mm, the annular diameter of the corresponding portion of the outer duct 201 is 96.4mm, and the annular interval between the two is just 1.5mm, so that the outer duct 201 and the rear casing 10a are intentionally set outside a safe distance of being out of contact with each other, and an absolute non-contact state is maintained.

This arrangement effectively prevents the motor blade assembly 202 from vibrating and the disturbance of the rear housing 10a due to the airflow from affecting each other. When the garden blower 100 operates, vibration is mainly generated by vibration generated by rotational motion of the motor blade assembly 202 and disturbance of air flow to the machine shell 10 due to turbulence, and when the annular interval between the outer duct 201 and the rear shell 10a of the machine shell 10 maintains an absolute non-contact state, neither the motor blade assembly 202 rotates and vibrates nor the rear shell 10a is disturbed due to the air flow, the motor blade assembly 202 and the rear shell are mutually independent and are not affected by each other, and vibration superposition is not generated.

On the other hand, the heat generated from the electronic device located in the accommodating chamber 70 can be introduced into the main air path 300 through the negative pressure inlet S, thereby forming an auxiliary heat dissipation air path and further providing effective heat dissipation treatment for the electronic device.

Referring to fig. 4, an opening 90L is provided at a position of the wall body of the main air path member 200 corresponding to the circuit board 90, and the circuit board 90 is positioned and mounted in the opening 90L so that a surface of the circuit board 90 closes off the opening 90L and is formed as a part of the wall body of the main air path member 200.

Specifically, in the first embodiment, the opening 90L is provided at the position corresponding to the circuit board 90 on the wall of the rear casing 10a of the main air duct member 200, and the circuit board 90 is positioned and mounted in the opening 90L correspondingly so that the surface of the circuit board 90 closes off the opening 90L and is formed as a part of the wall of the rear casing 10a of the main air duct member 200.

At this time, the circuit board 90 may be connected to the wall of the rear housing 10a by various mechanical connection methods, such as screw fastening or snap fastening, which will not be described herein.

[ Example two ]

Referring to fig. 6 and 7, another garden blower 100 according to the present invention includes:

A housing 10 having an air inlet end 101 and an air outlet end 102;

A main air path member 200 including a duct assembly 20 and formed with a main air path 300 adapted for airflow to flow along an air inlet end 101 toward an air outlet end 102, a receiving chamber 70 being formed between the main air path member 200 and the cabinet 10; the duct assembly 20 comprises an outer duct 201 and a motor fan blade assembly 202 arranged in the outer duct 201;

The controller 80 is electrically connected with the motor blade assembly 202 and comprises a circuit board 90 and a radiator 60 connected with the circuit board 90;

the controller 80 is embedded in the wall of the main wind path component 200 and is positioned at the upstream of the motor fan blade component 202; wherein,

The heat radiating outer surface of the heat radiator is at least partially exposed in the main air duct 300, and is configured to be formed as a part of the wall of the air intake chamber of the main air duct member 200;

Under the rotation of the motor blade assembly 202, air flows into the air inlet cavity along the air inlet end 101 to form a main air path 300, and flows into the duct assembly 20 by sweeping the heat dissipation outer surface of the radiator and flows to the air outlet end 102.

In the design of this garden blower 100, the circuit board 90 is provided with a radiator 60, and the surface portion of the radiator 60 is placed in the path of the main air path 300. When the blower is started to operate, the fan blade assembly driven by the motor rotates at a high speed, and the air flow is guided to continuously flow into the main air path 300 structure through the air inlet end 101, and the main air path 300 directly sweeps the exposed part of the surface of the radiator 60 by the strong air flow, so that efficient heat exchange is realized. Due to the design, the product does not need to be additionally provided with an independent air heat dissipation channel or set up a special heat dissipation air flow inlet and outlet, and the problem of insufficient heat dissipation possibly caused by limited air flow of the air channel in the prior art is perfectly solved.

In addition, the radiator 60 is integrated in the wall structure of the main air duct member 200, so that the main air duct 300 can smoothly approach and pass through the surface of the radiator in the smooth running process, thereby not only avoiding any obstruction to the air flow of the main air duct 300, but also greatly simplifying the overall structure and improving the convenience and feasibility of implementation. In this way, the air cooling system of the equipment is fully utilized to realize effective heat dissipation of the controller 80, and the optimization and stability of the overall performance of the blower are ensured.

Wherein the mos elements of the circuit board 90 are in contact with the surface of the heat sink 60 for better heat dissipation.

With continued reference to fig. 6, and in conjunction with fig. 8, the size of the aperture of the air intake chamber 400 gradually decreases in sequence along the flow direction of the main air path 300, and the heat dissipating outer surface of the heat sink 60 is at least partially visible when viewed from the front-rear view of the garden blower 100.

At this time, the controller 80 is inclined along the extension direction of the wall of the main duct member 200 to match the wall of the air intake chamber 400 so as to form a part of the wall of the air intake chamber 400 of the main duct member 200.

In addition, as further shown in fig. 6 and 7, the main air path member 200 further includes a rear casing 10a for forming an air intake chamber, and the rear casing 10a and the outer duct 201 are annularly spaced so that a negative pressure inlet S communicating with the accommodating chamber 70 is formed between the outer duct 201 and the rear casing 10 a;

Under the rotation of the motor blade assembly 202, the air flows from the accommodating chamber 70 to the negative pressure inlet S, forming an auxiliary heat dissipation air path, and enters the main air path 300 through the negative pressure inlet.

As described above, this arrangement is effective to prevent the motor blade assembly 202 from vibrating and the disturbance of the rear housing 10a due to the airflow from affecting each other. When the garden blower 100 operates, vibration is mainly generated by vibration generated by rotational motion of the motor blade assembly 202 and disturbance of air flow to the machine shell 10 due to turbulence, and when the annular interval between the outer duct 201 and the rear shell 10a of the machine shell 10 maintains an absolute non-contact state, neither the motor blade assembly 202 rotates and vibrates nor the rear shell 10a is disturbed due to the air flow, the motor blade assembly 202 and the rear shell are mutually independent and are not affected by each other, and vibration superposition is not generated.

Referring to fig. 9, an opening 80L is provided at a portion of the wall body of the main air path member 200 corresponding to the controller 80, and the controller 80 is correspondingly mounted to the positioning frame so that the heat dissipation outer surface of the controller 80 blocks the opening 80L and forms a part of the inner wall of the air inlet chamber 400, along with the edge of the opening 80L protruding upwards to form the positioning frame.

Further, the heat dissipation outer surface of the controller 80 does not completely block the opening 80L, and a small gap is provided between the controller 80 and the opening 80L and the positioning frame. At this time, the heat generated by the controller 80 can be further introduced into the main air duct 300 through the minute gap to further optimize the heat dissipation performance.

Further, referring to fig. 10 and 11, the surface of the radiator 60 is provided with a plurality of radiating fins 60a, and radiating channels are formed between the adjacent radiating fins 60a, the plurality of radiating fins 60a are divided into different lengths, and the guiding surfaces formed after the free ends of the plurality of radiating fins 60a are connected tend to be consistent with the wall shape of the main air duct 300, so that the smoothness and stability of the airflow in the main air duct 300 can be ensured, and the effective heat dissipation of the controller 80 is realized.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.

Claims

1.A garden blower, comprising:

The shell is provided with an air inlet end and an air outlet end;

the motor fan blade assembly is arranged in the main air path component;

The circuit board is electrically connected with the motor fan blade assembly;

The method is characterized in that:

2. The garden blower of claim 1, wherein: the surface of the circuit board exposed in the main air duct engages with the inner surface of the wall of the main air duct member.

3. A garden blower as claimed in claim 1 or 2, in which: the circuit board comprises a mos element, the mos element is arranged on one surface of the circuit board facing the main air path and is exposed in the main air path, and the main air path passes through the mos element to radiate heat.

4. A garden blower as claimed in claim 1 or 2, in which: the circuit board is arranged at the upstream of the motor fan blade assembly and is configured to form a part of the wall body of the air inlet cavity of the main air path component.

5. The garden blower of claim 4, wherein: the caliber of the air inlet cavity is gradually reduced along the flow direction of the main air path, and the surface of the circuit board is at least partially visible when the garden blower is observed from the front and rear view directions.

6. The garden blower of claim 1, wherein: the main air duct component comprises a duct assembly and a rear shell for forming an air inlet cavity, wherein the duct assembly comprises an outer duct and a motor fan blade assembly arranged in the outer duct;

7. The garden blower of claim 1 or 2 or 5 or 6, wherein: an opening is formed in the wall body of the main air path component, corresponding to the circuit board, and the circuit board is correspondingly positioned and installed in the opening, so that the surface of the circuit board seals the opening and forms a part of the wall body of the main air path component.

8. A garden blower, comprising:

The shell is provided with an air inlet end and an air outlet end;

The method is characterized in that:

9. The garden blower of claim 8, wherein: the caliber of the air inlet cavity is gradually reduced along the flow direction of the main air path, and the heat dissipation outer surface of the radiator is at least partially visible when the garden blower is observed from the front and rear view direction.

10. A garden blower as claimed in claim 8 or 9, in which: the controller is obliquely arranged along the extending direction of the wall body of the main air path component.

11. The garden blower of claim 8, wherein: the main air path component further comprises a rear shell used for forming an air inlet cavity, wherein the rear shell and the outer duct are annularly arranged at intervals, so that a negative pressure inlet communicated with the accommodating cavity is formed between the outer duct and the rear shell;

12. A garden blower as claimed in claim 8 or 9 or 11, in which: the wall body of the main wind path component is provided with an opening corresponding to the controller, the opening is upwards protruded and extended along the edge of the opening to form a positioning frame, and the controller is correspondingly arranged on the positioning frame, so that the heat dissipation outer surface of the controller is used for blocking the opening and is formed into a part of the inner wall of the air inlet cavity.

13. The garden blower of claim 12, wherein: the heat dissipation outer surface of the controller does not completely block the opening, and a small gap is arranged between the controller and the opening as well as between the controller and the positioning frame.