A hand-held dust blower
By designing a detachable filter module and a high-speed brushless motor, the problems of cumbersome filter replacement and high wind noise in existing dust blowers have been solved, enabling quick replacement and efficient cleaning, and improving wind speed and power.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU YUANLONG MARCHINERY CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
Smart Images
Figure CN224525501U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power tools, and more specifically to a handheld blow gun. Background Technology
[0002] When used as a blower, a dust gun can be used to clean up debris from construction work and other tasks such as removing fallen leaves. Known dust guns for cleaning construction debris use a motor-driven fan to generate airflow. To change the airflow strength and speed, different attachments are used to meet different user needs. Since attachments need to be switched depending on the situation, they must be easy for the user to disassemble. To prevent foreign objects from affecting the fan, a filter is installed at the air inlet. Currently, these filters are fixed, making cleaning and replacement cumbersome. They require opening the casing and removing fasteners (such as bolts) to replace the filter, which is inefficient. Furthermore, the airflow generating components and drive motor are spaced apart in current dust guns, suppressing airflow and increasing noise. Additionally, most dust guns use vacuum cleaner motors, which typically operate at speeds between 60,000 and 80,000 RPM, resulting in weak airflow, low speed, and high noise. Therefore, improvements to existing dust guns are needed. Utility Model Content
[0003] To overcome the above-mentioned shortcomings, the purpose of this application is to provide a handheld blower gun with a simple structure and the ability to quickly replace the filter module.
[0004] To achieve the above objectives, this application adopts the following technical solution:
[0005] A handheld blower gun, comprising:
[0006] The main housing has an air outlet on one side and an air inlet on the opposite side. A perforated end plate is installed on the air inlet side, and a filter module is installed on the end plate.
[0007] An airflow generating component is installed inside the main housing, with one side facing the air inlet and the other side connected to a hollow air outlet component. The air outlet component has an air outlet end on the side away from the airflow generating component, which passes through the air outlet and protrudes from the main housing.
[0008] A grip portion is disposed on the outer side of the main housing in the circumferential direction. A switch is mounted on the grip portion, and the grip portion has a receiving cavity. The opening of the receiving cavity is located on the side of the grip portion away from the main housing, and a battery pack is installed through the opening.
[0009] Preferably, the inner wall of the air inlet side has a recess and a groove communicating therewith, the recess extending axially along the main housing and the groove extending circumferentially along the main housing.
[0010] Preferably, the end plate has a body, one side of which has an annular protruding end, and the outer circumferential side of the protruding end has at least one protrusion that matches the recess, such that the protruding end is embedded in the air inlet.
[0011] Preferably, the outer circumferential surface of the protruding end has two symmetrically arranged protrusions.
[0012] Preferably, the air outlet component includes a transition section and an air outlet hood, the air outlet hood having an air outlet end, and the transition section being located between the airflow generating component and the air outlet hood.
[0013] Preferably, the transition section and the air outlet cover are designed as a single unit.
[0014] Preferably, the airflow generating component includes a housing, in which a drive motor is installed, and an output shaft is provided on the side of the drive motor near the air inlet. A fan is installed on the output shaft, and the inner diameter of the housing is the same as the inner diameter of the transition section.
[0015] The switch is constructed as a telescopic switch, and the telescopic direction of the switch is towards the air outlet side.
[0016] Preferably, the cross-section of the air outlet hood along its axial direction is shaped like a figure eight or a trumpet.
[0017] Preferably, the airflow generating component is equipped with a sensor for detecting the airflow speed and / or pressure.
[0018] Preferably, the main housing has a perforated grid plate inside, which is used to abut the filter module.
[0019] Preferably, the drive motor is a brushless motor with a speed between 80,000 and 130,000 rpm. This results in high speed, low noise, high wind speed, and strong airflow during operation.
[0020] Beneficial effects
[0021] This application optimizes the structure of the main housing by setting a snap-fit part on the air inlet side. This snap-fit part can fix the filter module. The filter module adopts a modular design, so the filter module can be directly removed when it needs to be replaced, which allows for quick cleaning or replacement of the filter module. Attached Figure Description
[0022] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this application.
[0023] Figure 1 A three-dimensional structural diagram of the blow gun provided in the embodiments of this application;
[0024] Figure 2 for Figure 1 A top-down view;
[0025] Figure 3 This is a schematic diagram of the internal structure of the blower gun according to an embodiment of this application;
[0026] Figure 4 This is a schematic diagram of the end plate of the blow gun according to an embodiment of this application;
[0027] Figure 5 This is a schematic diagram of the installation of a filter module on a 4-end plate.
[0028] Figure 6 This is a schematic diagram of the concealed end plate of the blow gun according to an embodiment of this application;
[0029] Figure 7 This is a schematic diagram of the internal structure of the concealed end plate of the blow gun according to an embodiment of this application.
[0030] Figure 8 This is a schematic diagram showing the connection between the airflow generating component and the air outlet component in an embodiment of this application;
[0031] Figure 9 This is a schematic diagram of the air outlet component according to an embodiment of this application;
[0032] Figure 10 for Figure 9 A schematic diagram of the cross-section at point BB. Detailed Implementation
[0033] The present application will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of this application.
[0034] In this application, the terms "upper," "lower," "inner," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0035] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.
[0036] This application proposes a handheld blower, which includes: a main housing, an air outlet at one end of the main housing, an air inlet at the opposite end of the main housing, a perforated end plate installed on the air inlet side, and a filter module installed on the end plate.
[0037] An airflow generating component is installed inside the main housing, with one side facing the air inlet and the other side connected to a hollow air outlet component. The air outlet component has an air outlet end on the side away from the airflow generating component, which passes through the air outlet and protrudes from the main housing.
[0038] A grip is provided on the outer circumferential side of the main housing. A switch is mounted on the grip, and a receiving cavity is located within the grip. The opening of the receiving cavity is located on the side of the grip away from the main housing, through which a battery pack is installed. A transition section is provided to reduce airflow noise. A cover is provided on the air inlet side, allowing for easy removal of the filter module during maintenance, thus reducing the complexity of cleaning the blower.
[0039] Next, combine Figures 1-10 This application describes a handheld blower provided in an embodiment.
[0040] The handheld blower includes a main housing 110, which is cylindrical. One end of the main housing 110 has an air outlet 110d, and the opposite end has an air inlet 110c. A perforated end plate 111 is mounted on the air inlet, and a filter module 170 is mounted on the end plate 111. The filter module 170 is detachable for easy periodic cleaning. The filter module 170 can be a filter screen (such as a metal filter screen). The filter module 170 abuts against a grid plate 180. The grid plate 180 has a perforated structure, allowing airflow while preventing debris or fingers from touching the high-speed rotating fan 151.
[0041] The main housing 110 houses an airflow generating component 150, which is connected to an air outlet component. The air outlet component includes a transition portion 160 and an air outlet shroud 120. The air outlet shroud 120 includes an air outlet end 120a, which passes through the air outlet 110d of the main housing 110 and protrudes from the main housing 110. The air outlet end 120a is provided with a snap-fit portion 120a1, allowing it to be connected to an air nozzle (not shown). Different shaped air nozzles can meet different corresponding dust blowing requirements. When the air nozzle is installed on the air outlet end 120a, it is fixed by the snap-fit portion 120a1. In one embodiment, the transition portion 160 and the air outlet shroud 120 are designed integrally. The airflow generating component 150 faces the air inlet 110c. The transition portion 160 prevents air leakage, ensuring smooth airflow within it without generating additional wind noise.
[0042] The airflow generating component 150 includes a housing 152, which is a hollow cylindrical shape. Preferably, the housing 152 faces the air inlet 110c. A drive motor is installed inside the housing 152. This drive motor can be a brushless motor with a speed greater than 60,000 rpm. Preferably, its speed is greater than 80,000 rpm, and further, its speed is between 80,000 and 130,000 rpm. This results in high operating speed, low noise, high wind speed, and strong airflow.
[0043] The drive motor has an output shaft on which a fan 151 is mounted. The drive motor drives the fan 151 to rotate, generating airflow within the main housing 110 (housing 152). This airflow is guided through a transition section 160 and then through an exhaust shroud 120, exiting from its outlet or nozzle. The transition section reduces airflow noise. A removable end plate on the air inlet side allows for easy access during maintenance, enabling the removal of the filter module mounted on the end plate and simplifying the cleaning process of the blow gun. The transition section 160 further reduces airflow noise. The inner diameter of the transition section 160 is the same as or approximately the same as the inner diameter of the housing 152.
[0044] In this embodiment, the cross-section (the cross-section along its axial direction) of the air outlet shroud 120 is conical, and the inner diameter at the air outlet end is smaller than the inner diameter of its main body. A groove may be provided in the circumferential direction on the outer side of the transition portion 160, which is used to engage with the protrusion of the main housing 110, so that the air outlet shroud is partially embedded in the main housing 110 and fixed to the main housing 110.
[0045] A grip portion 130 is provided on the outer circumferential side of the main housing 110. A mounting portion 130a is located on the side of the grip portion 130 away from the main housing 110, through which a pluggable battery pack 200 is mounted. The battery pack 200 has a voltage of 18V. A switch 140 is mounted on the grip portion 130, and the extension / retraction direction of the switch 140 points towards the air outlet side. The switch 140 is electrically connected via wiring to a control board 181 within the grip portion 130. Preferably, a positioning portion is provided within the grip portion 130, and the control board is fixed to the positioning portion (e.g., the control board extends axially along the main housing 110). The cable of the drive motor is electrically connected to the control board.
[0046] In one embodiment, a sensor is provided inside the airflow generating component 150. Preferably, the sensor is located inside the housing 152 and is used to detect the wind speed and / or pressure of the airflow.
[0047] In one embodiment, the main body 110 is composed of a first housing 110a and a second housing 110b. Preferably, the main body 110 and the gripping part 130 can be integrally disposed, and the main body 110 is composed of two housings.
[0048] The main housing has an air inlet 110c on one side, and a perforated end plate 111 is installed on the air inlet 110c. A filter module 170 is installed on the end plate 111. The filter module 170 is designed to be detachable, which facilitates regular cleaning in the future.
[0049] The end plate 111 is cylindrical and has a body 111b. One side of the body 111b has an annular protruding end 111a. The outer diameter of the protruding end 111a is smaller than the outer diameter of the end plate 111, so that the protruding end 111a can cover the air inlet 110c on one side of the main housing (e.g., be embedded in the air inlet 110c). The outer circumferential direction of the protruding end 111a has at least one protrusion 111a1, which matches the recess 110c1 on the side of the air inlet 110c. During installation, the protruding end 111a is embedded in the air inlet 110c (see...). Figure 9 Taking the first housing 110a as an example, its air inlet 110c side has a recess 110c1 and a groove 110c2. The groove 110c2 extends circumferentially along the inner wall of the first housing 110a, and the recess 110c1 extends axially along the inner wall of the second housing 110b. The protrusion 111a slides into the groove 110c2 through the recess 110c1. The two ends of the groove 110c2 have a first stop 110c21 and a second stop 110c22. The first stop 110c21 and the second stop 110c22 limit the rotation range of the end plate 111 and realize the locking of the end plate 111, that is, it is fixed on the main housing. During maintenance, it can be unlocked by rotating in the opposite direction to remove the end plate 111.
[0050] In one embodiment, the outer circumferential surface of the protruding end has two protrusions 111a1, which are symmetrically arranged. At this time, the air inlet 110c side has a matching recess 110c1 and groove 110c2.
[0051] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.
Claims
1. A handheld blower, characterized in that, include: The main housing has an air outlet on one side and an air inlet on the opposite side. A perforated end plate is installed on the air inlet side, and a filter module is installed on the end plate. An airflow generating component is installed inside the main housing, with one side facing the air inlet and the other side connected to a hollow air outlet component. The air outlet component has an air outlet end on the side away from the airflow generating component, and the air outlet end passes through the air outlet and protrudes from the main housing. and A grip portion is disposed on the outer side of the main housing in the circumferential direction. A switch is mounted on the grip portion, and the grip portion has a receiving cavity. The opening of the receiving cavity is located on the side of the grip portion away from the main housing, and a battery pack is installed through the opening.
2. The handheld blower gun as described in claim 1, characterized in that, The inner wall of the air inlet side has a recess and a groove communicating with it. The recess extends axially along the main housing, and the groove extends circumferentially along the main housing.
3. The handheld blower gun as described in claim 2, characterized in that, The end plate has a body, one side of which has an annular protruding end, and the outer circumferential side of the protruding end has at least one protrusion that matches the recess, such that the protruding end is embedded in the air inlet.
4. The handheld blower gun as described in claim 3, characterized in that, The outer circumferential surface of the protruding end has two symmetrically arranged protrusions.
5. The handheld blower gun as described in claim 1, characterized in that, The air outlet component includes a transition section and an air outlet hood. The air outlet hood has an air outlet end, and the transition section is located between the airflow generating component and the air outlet hood.
6. The handheld blower gun as described in claim 5, characterized in that, The transition section and the air outlet cover are designed as a single unit.
7. The handheld blower gun as described in claim 5, characterized in that, The airflow generating component includes a housing, a drive motor is installed inside the housing, an output shaft is provided on the side of the drive motor near the air inlet, a fan is installed on the output shaft, and the inner diameter of the housing is the same as the inner diameter of the transition section. The switch is constructed as a telescopic switch, and the telescopic direction of the switch is towards the air outlet side.
8. The handheld blower gun as described in claim 5, characterized in that, The cross-section of the air outlet hood along its axial direction is either figure-eight shaped or trumpet-shaped.
9. The handheld blower gun as described in claim 1, characterized in that, The airflow generating component includes a drive motor, the speed of which is between 80,000 rpm and 130,000 rpm.
10. The handheld blower gun as described in claim 1, characterized in that, The main housing has a perforated grid plate inside, which is used to abut against the filter module.