Leaf blowing machine for gardens

Abstract

This utility model discloses a garden leaf blower, comprising a housing with an internal air duct, an air outlet at one end of the housing, and two air inlets on both sides of the other end that communicate with the air inlets of the air duct. A bidirectional centrifugal fan and a drive motor are installed inside the housing. The bidirectional centrifugal fan is located between the two air inlets and has a circumferential partition with fan blades on both sides. When driven by the motor, the bidirectional centrifugal fan allows simultaneous air intake from both air inlets, and the air flows converge and exits through the air duct from the air outlet. A removable lithium battery is also installed in the housing to power the motor. This utility model, through the combination of dual-sided air intake and the bidirectional centrifugal fan, effectively enhances the air pressure and speed, quickly clearing large areas of debris; the removable lithium battery design allows users to quickly replace the spare battery, significantly improving operational efficiency and operational flexibility.

Description

Technical Field

[0001] This utility model relates to the field of leaf blowing machine technology, specifically a leaf blowing machine for gardens. Background Technology

[0002] In garden maintenance, leaf blowers are used as efficient tools for cleaning up fallen leaves, weeds, and other debris, and their performance directly affects the efficiency and quality of garden cleaning.

[0003] However, traditional leaf blowers mostly use a single-sided, single-inlet design, working with a unidirectional fan. During operation, the limited airflow and weak air pressure and speed result in repeated operation when dealing with large areas of fallen leaves or stubborn weeds, severely reducing efficiency. Furthermore, battery-powered models generally suffer from high battery integration with the machine body, making battery replacement difficult. When the battery runs out, operation must be paused while waiting for charging, affecting continuous operation and work progress. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a garden leaf blower that can effectively solve the technical problems of low air intake efficiency and lack of flexibility in use of traditional leaf blowers.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A garden leaf blower includes a housing with an internal air duct, the air duct having an air inlet and an air outlet, one end of the housing having an air outlet communicating with the air outlet, and the other end of the housing having two air inlets communicating with the air inlet, the air inlets being distributed on both sides of the housing.

[0007] The housing contains a bidirectional centrifugal fan and a motor for driving the bidirectional centrifugal fan. The bidirectional centrifugal fan is located between two air inlets. The bidirectional centrifugal fan has a circumferentially arranged partition and fan blades. The partition is coaxially arranged between the two air inlets, and the fan blades are respectively arranged on both sides of the partition. When the motor drives the bidirectional centrifugal fan to rotate, the bidirectional centrifugal fan realizes synchronous air intake from both air inlets and air delivery to the air outlet through the air duct.

[0008] The housing also houses a removable lithium battery for powering the motor.

[0009] Furthermore, a control circuit board is provided inside the housing, which is electrically connected to the motor and the lithium battery respectively, and a control panel connected to the control circuit board is provided on the outside of the housing.

[0010] Furthermore, an extension tube and an air guide shroud are sequentially sleeved on one end of the housing where the air outlet is located. The housing and one end of the extension tube are detachably connected by a first splicing assembly, and one end of the extension tube and one end of the air guide shroud are detachably connected by a second splicing assembly.

[0011] Furthermore, the first splicing component includes a first locking block disposed at one end of the housing and a first locking hole disposed at one end of the extension tube and engaged with the first locking block for fixation; the second splicing component includes a second locking block disposed at the other end of the extension tube and a second locking hole disposed at one end of the air guide shroud and engaged with the second locking block for fixation.

[0012] Furthermore, the motor is embedded in the middle of the bidirectional centrifugal fan, and the bidirectional centrifugal fan has a mounting hole that is coaxially fixed with the output end of the motor.

[0013] Furthermore, a grip portion is provided at the end of the housing away from the air outlet, and the lithium battery is installed at the end of the grip portion.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention utilizes a bidirectional centrifugal fan combined with a double-sided air inlet design on the casing. As the bidirectional centrifugal fan rotates, air is simultaneously drawn in from both sides, causing the two air paths to converge and be concentratedly discharged from the outlet through the air duct. This effectively enhances the air pressure and wind speed, enabling the rapid removal of large areas of fallen leaves, weeds, and other debris, significantly improving garden cleaning efficiency. The leaf blower is equipped with a removable lithium battery for power supply, allowing users to quickly replace the battery and continue operation without waiting for charging, greatly enhancing the flexibility of use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the leaf blower according to an embodiment of the present utility model;

[0017] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the leaf blower according to an embodiment of the present utility model;

[0018] Figure 3 This is an exploded view of the overall structure of the leaf blower according to an embodiment of the present invention;

[0019] Figure 4 This is an exploded view of the internal structure of the shell in an embodiment of this utility model;

[0020] Figure 5 This is an exploded view of the internal structure of the shell in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the bidirectional centrifugal fan structure according to an embodiment of the present invention;

[0022] Numbering on the map:

[0023] 1-Housing, 2-Air duct, 3-Bidirectional centrifugal fan, 4-Motor, 5-Lithium battery, 6-Control circuit board, 7-Control panel, 8-Extension tube, 9-Air guide cover;

[0024] 101-Air outlet, 102-Air inlet, 103-First locking block, 104-Holding part;

[0025] 301 - Middle partition plate, 302 - Fan blade body, 303 - Mounting hole;

[0026] 801 - First locking hole; 802 - Second locking block;

[0027] 901 - Second locking hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1-6 As shown, this utility model provides a garden leaf blower, aiming to solve the problems of low air intake efficiency and lack of flexibility in the use of traditional leaf blowers. Its overall structure includes a housing 1, a bidirectional centrifugal fan 3, a motor 4, a lithium battery 5, an extension pipe 8, and an air guide shroud 9, etc. Through reasonable structural design, it achieves the functions of efficient air delivery, convenient operation, and flexible use.

[0030] The housing 1 is injection molded from high-strength ABS plastic, featuring lightweight and impact resistance. An air duct 2 is formed inside the housing 1, with a tapering structure where the cross-section gradually decreases from the air inlet to the air outlet, effectively increasing airflow velocity. One end of the housing 1 has an integrally formed air outlet 101, while the other end has two symmetrically arranged air inlets 102, distributed on both sides of the housing 1. The air inlets 102 can be configured as mesh to prevent debris such as leaves and pebbles from entering the housing 1 and damaging its components.

[0031] The end of the housing 1 furthest from the air outlet 101 has an integrally formed grip 104. The grip 104 is ergonomically designed with anti-slip textures on its surface for easy handling. The end of the grip 104 has a lithium battery mounting slot. The lithium battery 5 is detachably mounted in this slot via a snap-fit ​​structure. The snap-fit ​​structure includes a spring-loaded claw inside the mounting slot and a slot outside the lithium battery 5. Pressing the spring-loaded claw allows for the removal of the lithium battery 5, facilitating charging and replacement.

[0032] The bidirectional centrifugal fan 3 is injection molded from high-strength nylon material, exhibiting excellent wear resistance and fatigue resistance. The bidirectional centrifugal fan 3 features a circumferentially arranged partition 301 and fan blades 302. The partition 301 is a circular flat plate structure, coaxially positioned between the two air inlets 102, with a diameter slightly smaller than the corresponding inner diameter of the housing 1 to ensure smooth airflow. The fan blades 302 are integrally formed on both sides of the partition 301, each side comprising several evenly distributed fan blades with an arc-shaped structure, effectively improving air intake efficiency.

[0033] Motor 4 is a brushless DC motor, characterized by high efficiency, low noise, and long lifespan. Motor 4 is embedded in the center of the bidirectional centrifugal fan 3. A mounting hole 303, coaxially fixed to the output end of motor 4, is provided at the center of the bidirectional centrifugal fan 3. The output end of motor 4 is fixed to the mounting hole 303 via an interference fit, ensuring that motor 4 can stably drive the bidirectional centrifugal fan 3 to rotate synchronously. Motor 4 is bolted to a motor bracket (not shown) inside the housing 1. The motor bracket and housing 1 are integrally formed, improving the overall structural stability.

[0034] A control circuit board 6 is located inside the housing 1 near the grip portion 104, and is fixed inside the housing 1 with screws. The control circuit board 6 is electrically connected to the motor 4 and the lithium battery 5 via wires. Above the grip portion 104 on the outside of the housing 1, a control panel 7 connected to the control circuit board 6 is located. The control panel 7 is waterproof and has a power switch, a fan speed adjustment button, and a power indicator light on its surface. The power switch controls the start and stop of the motor 4, the fan speed adjustment button allows for multiple fan speed settings, and the power indicator light displays the remaining power of the lithium battery 5 in real time.

[0035] The lithium battery 5 uses a high-capacity lithium battery pack, and its casing is made of flame-retardant material, which can meet the needs of long-term continuous operation.

[0036] To better facilitate the operation of the leaf blower, an extension tube 8 and an air guide shroud 9 are sequentially connected to one end of the housing 1 where the air outlet 101 is located. The extension tube 8 extends the air delivery distance, making it easier for operators to clean up fallen leaves at high or distant locations. The air guide shroud 9 has a flat air outlet or other specified design shape, which can change the air delivery direction and improve the efficiency of leaf collection.

[0037] The housing 1 and the extension tube 8 are detachably connected via a first splicing assembly. The first splicing assembly includes a first locking block 103 integrally formed on the outer side of one end of the housing 1 and a first locking hole 801 formed on the inner side of one end of the extension tube 8 and adapted to the first locking block 103. The first locking block 103 is an elastic protrusion structure that deforms upon insertion, repositions itself after aligning with the first locking hole 801, and is thus fixed in place. To disassemble, the extension tube 8 can be pulled out by pressing the first locking block 103.

[0038] The extension tube 8 and the air guide shroud 9 are detachably connected by a second splicing assembly. The second splicing assembly includes a second locking block 802 integrally formed on the outer side of the other end of the extension tube 8 and a second locking hole 901 adapted to the second locking block 802 and opened on the inner side of one end of the air guide shroud 9. Its connection and disassembly methods are the same as those of the first splicing assembly, and the operation is convenient.

[0039] During operation, the operator installs the lithium battery 5 at the end of the grip 104 and starts the equipment via the power switch on the control panel 7. After receiving the signal, the control circuit board 6 controls the motor 4 to start. The output of the motor 4 drives the bidirectional centrifugal fan 3 to rotate synchronously. Since the bidirectional centrifugal fan 3 has fan blades 302 on both sides of the partition 302, a negative pressure is formed on both sides when it rotates, so that outside air enters the air duct 2 synchronously through the air inlets 102 on both sides of the housing 1.

[0040] The airflow entering the air duct 2 flows towards the air outlet 101 under the action of the bidirectional centrifugal fan 3. Because the air duct 2 has a gradually narrowing structure, the airflow speed gradually increases. Then the airflow is discharged through the extension pipe 8 and the air guide shroud 9 in sequence. The air guide shroud 9 can guide the airflow direction to realize the blowing operation of fallen leaves.

[0041] The control circuit board 6 can adjust the speed of the motor 4 according to the wind speed adjustment signal from the control panel 7, thereby changing the air volume and air pressure of the bidirectional centrifugal fan 3 to meet the purging needs of different scenarios. At the same time, the control circuit board 6 monitors the power of the lithium battery 5 and provides real-time feedback through the power indicator light to ensure the normal operation of the equipment. When it is necessary to clean different locations or adjust the purging range, the extension tube 8 and the air guide shroud 9 can be disassembled or installed through the first and second splicing components to improve the flexibility of the equipment.

[0042] Compared with traditional technologies, this technical solution uses a bidirectional centrifugal fan 3 in conjunction with the dual air inlets 102 on both sides of the housing 1. As the bidirectional centrifugal fan 3 rotates, air can be simultaneously drawn in from the air inlets 102 on both sides. The two air paths converge and are then concentrated and discharged from the air outlet 101 through the air duct 2, effectively enhancing the air supply pressure and wind speed. This allows for the rapid removal of large areas of fallen leaves, weeds, and other debris, significantly improving the efficiency of garden cleaning. The leaf blower is equipped with a removable lithium battery 5 for power supply, allowing users to quickly replace the spare battery and continue operation without waiting for charging, greatly enhancing the flexibility of use.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A leaf blower for gardens, comprising a housing with an internal air duct, the air duct having an air inlet and an air outlet, characterized in that: One end of the housing is provided with an air outlet that communicates with the exhaust end, and the other end of the housing is provided with two air inlets that communicate with the air inlets. The air inlets are distributed on both sides of the housing. The housing contains a bidirectional centrifugal fan and a motor for driving the bidirectional centrifugal fan. The bidirectional centrifugal fan is located between two air inlets. The bidirectional centrifugal fan has a circumferentially arranged partition and fan blades. The partition is coaxially arranged between the two air inlets, and the fan blades are respectively arranged on both sides of the partition. When the motor drives the bidirectional centrifugal fan to rotate, the bidirectional centrifugal fan realizes synchronous air intake from both air inlets and air delivery to the air outlet through the air duct. The housing also houses a removable lithium battery for powering the motor.

2. A leaf blower for gardens according to claim 1, characterized in that: The housing contains a control circuit board, which is electrically connected to the motor and the lithium battery. The housing also contains a control panel connected to the control circuit board.

3. A leaf blower for gardens according to claim 1, characterized in that: One end of the housing with an air outlet is sequentially fitted with an extension tube and an air guide shroud. The housing and one end of the extension tube are detachably connected by a first splicing assembly, and one end of the extension tube and one end of the air guide shroud are detachably connected by a second splicing assembly.

4. A leaf blower for gardens according to claim 3, characterized in that: The first splicing component includes a first locking block located at one end of the housing and a first locking hole located at one end of the extension tube and engaged with the first locking block for fixation; the second splicing component includes a second locking block located at the other end of the extension tube and a second locking hole located at one end of the air guide cover and engaged with the second locking block for fixation.

5. A leaf blower for gardens according to claim 1, characterized in that: The motor is embedded in the middle of the bidirectional centrifugal fan, and the bidirectional centrifugal fan has a mounting hole that is coaxially fixed with the output end of the motor.

6. A leaf blower for gardens according to any one of claims 1-5, characterized in that: The housing has a grip at the end away from the air outlet, and the lithium battery is installed at the end of the grip.

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