A long-range spray misting machine

Abstract

This utility model discloses a long-range spray misting machine, including a cylindrical spray head connected to a handheld part and having a guide tube; an axial flow fan is coaxially mounted in the guide tube, with the air outlet side of the axial flow fan facing forward; the guide tube serves as the spray guide channel of the misting machine, with the front end of the spray guide channel serving as the spray nozzle, and the rear end of the spray guide channel corresponding to the air outlet side of the axial flow fan; it also includes several nozzles for spraying liquid droplets, evenly distributed in a ring at equal angles on the outer edge of the spray nozzle; the extension line of the spray direction of each nozzle forms an angle with the axis of the guide tube, and this angle is acute. This utility model can effectively reduce the attenuation of spray kinetic energy while ensuring ease of operation, thus resolving the contradiction between long-range spraying and ease of operation.

Description

Technical Field

[0001] This utility model relates to a fogging machine, specifically a fogging machine for long-distance spraying. Background Technology

[0002] A mist sprayer, also known as a fogging machine, is a product that uses an electric motor to drive a centrifugal drum and a fan to achieve a spraying function. During operation, the high-speed rotating centrifugal drum sprays liquid, forming tiny droplets. These droplets are typically between 1 and 100 micrometers in size, effectively covering an entire space and remaining in the air for a considerable period. Due to its functional characteristics, mist sprayers are widely used for pesticide spraying in agriculture and forestry, sterilization and disinfection in public places, and mosquito control and repellency in outdoor campsites.

[0003] Fog sprayers typically include various types such as pulse fog sprayers, handheld fog sprayers, and backpack fog sprayers. Among them, backpack fog sprayers are widely popular due to their wide spray range, high efficiency, and versatility. A typical backpack fog sprayer consists of a main unit and a handheld spray head, connected by a spray pipe. The main unit integrates a liquid tank, motor, centrifugal drum, and fan. The main unit atomizes the liquid and sprays it out through the spray pipe. The operator controls the spray direction by manipulating the direction of the handheld spray head, thus achieving the spraying operation. The existing backpack fog sprayers have the following shortcomings:

[0004] First, the distance between the handheld spray nozzle and the main unit is relatively far, which causes the spray kinetic energy to decrease, thus limiting the spray distance. Research has found that the longer the spray tube, the more severe the decrease in spray kinetic energy. However, if the spray tube is shortened to maintain the spray kinetic energy, it will lead to the problem of inconsistent operation of the handheld spray nozzle. Thus, there is a contradiction between "spray distance" and "ease of operation".

[0005] Second, the fan is installed on the main unit, that is, at the beginning of the air duct of the spray pipe, which means that the fan power cannot be fully utilized, further affecting the spray distance;

[0006] Third, the formation of droplets is located at the beginning of the air duct of the spray pipe, and the spray pipe has a certain length, which causes the droplets to "hang on the wall" during spraying. That is, the droplets will adhere to and condense on the inner wall of the spray pipe along its length. On the one hand, this affects the droplet content in the actual spray. On the other hand, the droplets condensed on the inner wall will gradually converge into beads and flow out along the inner wall as the spraying progresses, instead of being sprayed out as a water mist, thus affecting the spraying effect.

[0007] In summary, how to extend the spraying distance without affecting the spraying effect and ease of operation has become the research and solution of this utility model. Utility Model Content

[0008] The purpose of this invention is to provide a long-distance spraying misting machine.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A long-range spraying misting machine includes a cylindrical spray head connected to a hand-held part, and the cylindrical spray head has a guide tube inside;

[0011] An axial flow fan is coaxially mounted in the flow guide tube, with the air outlet side of the axial flow fan facing forward;

[0012] The inner cavity of the guide tube serves as the spray guide channel of the mist sprayer. The front end of the spray guide channel serves as the spray nozzle, and the rear end of the spray guide channel is set to the air outlet side of the axial fan.

[0013] It also includes several nozzles for spraying liquid droplets, which are evenly distributed in a ring at equal angles on the outside of the spray nozzle to form an annular spray head; the extension line of the spray direction of each nozzle forms an angle α with the axis of the guide tube, and the angle α is an acute angle.

[0014] A further technical solution involves setting the included angle α to 25°±5°. This design allows the spray to precisely cover a defined work area, facilitating accurate control of the spray direction and landing point, and significantly reducing unnecessary waste of the spray solution. By concentrating the spray on the required area, the loss of the spray in the surrounding environment is greatly reduced, ensuring that the spray liquid reaches the target object or area more effectively, thereby significantly improving the utilization rate of the spray liquid.

[0015] A further technical solution involves the inner wall of the guide tube contracting inward towards the air outlet direction to form an inward contraction angle β, which has a degree of 15°±5°. This inward contraction angle β design creates a converging effect on the air outlet, generating higher air pressure. Combined with the nozzle's α-angle spray angle, this allows the liquid to be sprayed further.

[0016] In a further technical solution, the drive unit of the axial fan is an external rotor brushed motor with a speed of 40,000~80,000 r / min, preferably 80,000 r / min.

[0017] A further technical solution involves using backward-curved guide vanes, with 10 to 15 vanes, preferably 12; the vane body is curved and undulating, with a helical angle of 15°±5°. Through this specific helical angle setting, the backward-curved guide vanes direct the airflow, sending it onto the guide tube. The airflow is then converged, guided, and transported by the inner contraction angle β of the guide tube, ultimately allowing the liquid ejected from the nozzle to be sprayed further.

[0018] By employing backward-curved blades and rationally designing their curvature, the airflow within the impeller can be made smoother, reducing energy loss. This can reduce airflow separation and vortex formation, thereby increasing wind pressure.

[0019] A further technical solution involves connecting each nozzle to a liquid supply pipe, with the connection end of the liquid supply pipe to the cylindrical spray head recessed into the inner wall surface of the cylindrical cavity. This design ensures that the liquid supply pipe delivers liquid to the nozzle while preventing the connection end from obstructing the spray guide channel, thus guaranteeing smooth airflow.

[0020] In a further technical solution, the liquid supply pipe is connected to a solenoid valve, the other end of which is connected to a water pipe connector. The solenoid valve controls the flow of water, effectively controlling liquid ejection while preventing backflow.

[0021] A further technical solution is that the centerline of the water pipe connector and the centerline of the handheld part form an angle γ, the angle γ being 120°±10°. The water pipe connector extends from the tail of the handheld part, and the angle γ provides the operator with a better grip and is more ergonomic.

[0022] A further technical solution is that the water pipe connector is an M18 water pipe connector. It has better versatility and can be connected to most spray canisters currently on the market. Besides the M18 water pipe connector, other water pipe connectors such as M16 can also be used in this application, but the M18 model is preferred.

[0023] A further technical solution involves having 4 to 8 nozzles, with 6 being preferred, distributed at a 60° angle. Evenly distributing multiple nozzles allows for a more uniform spray pattern.

[0024] A further technical solution also includes a telescopic rod, which is fixed relative to the cylindrical spray head.

[0025] In a further technical solution, the ratio of the diameter of the axial fan to the width of the spray guide channel is 1:(0.85±0.1), with 1:0.85 being preferred.

[0026] By using this specific ratio setting, the following technical effects can be achieved:

[0027] 1) It can match the range of airflow with the diffusion range of the spray. When the axial fan rotates, its airflow can precisely guide the spray to the predetermined area, ensuring that the spray can effectively cover the work surface. This not only improves the utilization rate of the spray but also guarantees the effective distance of the spray, making the spraying operation more effective.

[0028] 2) Improved fan energy efficiency. This ratio allows the axial fan to generate just the right airflow with lower power input. This airflow evenly delivers water mist to the area where spraying is needed without wasting energy. Therefore, this design not only increases the fan's effective power but also significantly reduces energy consumption, which helps extend the operating time when the built-in power supply is used.

[0029] 3) The dimensional compatibility of the spray guide channels is crucial for stable equipment operation. During operation, this design ensures smoother airflow and spray, reducing resistance and turbulence caused by structural inconsistencies. This not only improves operating efficiency but also significantly reduces the probability of malfunctions. Therefore, this design enhances equipment stability and extends its lifespan, providing users with a more reliable and durable user experience.

[0030] 4) It can reduce the axial velocity of the gas at the outlet, and according to the law of conservation of energy, more of this energy will be converted into static pressure energy, thereby increasing the wind pressure.

[0031] In the above solution, this utility model can work in two modes: external power supply or self-powered power supply. Since this part belongs to the prior art, it will not be described in detail.

[0032] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0033] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0034] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0035] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0036] The working principle and advantages of this utility model are as follows:

[0037] 1. By placing the fan in front of the cylindrical spray head of the mist sprayer, compared with the existing technology that sets the fan on the main unit, this utility model can effectively reduce the attenuation of spray kinetic energy by eliminating the spray pipe, while ensuring the convenience of operation, thus solving the contradiction between long-distance spraying and ease of operation.

[0038] 2. This utility model eliminates the need for a spray pipe, requiring only a water supply pipe. Compared to the long and cumbersome spray pipe, the impact of the water supply pipe on operation is greatly reduced.

[0039] 3. This utility model uses an axial flow fan and sets the fan blades to be backward-curved blades with a helical angle of 15°±~5°, thereby effectively ensuring the initial spray kinetic energy and forming a high-speed airflow in the spray guide channel to meet the needs of long-distance spraying.

[0040] 4. The liquid nozzle of this utility model is located on the outer edge of the mouth of the cylindrical spray head. The liquid is directly introduced into each nozzle through the pipeline, which avoids the problem of droplets sticking to the wall that is easy to cause in the existing spray pipe design, and ensures the spray efficiency and liquid utilization rate. At the same time, by designing each nozzle to be evenly distributed in a ring at the same angle, the atomization effect can be more uniform.

[0041] 5. This utility model achieves a balance between spray distance and atomization effect by forming an angle α between the extended lines of the spray direction of each nozzle and the axis of the guide tube, and this angle α is an acute angle. This ensures that the sprayed droplets are fully mixed with the high-speed airflow sprayed from the spray guide channel by the axial fan, while avoiding the weakening of spray kinetic energy by the droplets.

[0042] 6. The inner contraction angle β formed by the inner wall of the guide tube contracting inward towards the air outlet direction can make the high-speed airflow ejected from the spray guide channel form a high-speed contraction spiral wind, which has a beneficial effect on the anti-dispersion of the spray. By working in conjunction with the spray angle α of the nozzle, it can further ensure the extension of the effective spray distance.

[0043] 7. This utility model sets the connection end of the liquid supply pipe and the cylindrical spray head radially on the outer side of the inner wall of the guide tube. On the one hand, it can avoid obstructing the airflow, thereby ensuring that the spray kinetic energy does not decrease. On the other hand, it also facilitates the assembly of the liquid supply pipe.

[0044] This invention, by extending the spraying distance, can bring the following beneficial effects:

[0045] 1. A longer spraying distance means that a larger area can be covered in a shorter time, thus significantly improving the efficiency of spraying operations and thereby greatly reducing operation time and labor costs;

[0046] 2. Extending the spraying distance can reduce waste during the spraying process, ensuring that every drop of pesticide can effectively act on the target area, which helps to save water resources and pesticide usage, and reduce costs;

[0047] 3. The longer spray distance allows fog machines to be used in more types of locations, including areas with complex terrain or large areas, which helps to expand the operating range of fog machines.

[0048] 4. In terms of agricultural and forestry applications, for certain large trees or large areas of forest, extending the spraying distance can achieve effective spray coverage, avoiding the problem that existing products cannot achieve full spray coverage;

[0049] For pest and disease control in large areas of farmland or orchards, extending the spraying distance allows operators to spray from a greater distance, reducing direct contact with plants or harmful substances. This helps to reduce operational difficulty and risk, and improve operational safety.

[0050] 5. When used for disinfection and sterilization in public places, hospitals, schools, and other areas, the longer spray distance can reduce the occurrence of kill zones, thereby effectively killing bacteria and viruses and ensuring public health safety.

[0051] 6. It can be used for other applications, such as smoke in film and television, fog in garden landscapes, etc., to achieve specific visual effects through a longer dispersion distance. Attached Figure Description

[0052] Appendix Figure 1 This is a front view of an embodiment of the present utility model;

[0053] Appendix Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0054] Appendix Figure 3 This is a schematic diagram of the structure of an axial flow fan according to an embodiment of the present invention;

[0055] Appendix Figure 4 This is a side view of an embodiment of the present utility model;

[0056] Appendix Figure 5 This is a schematic diagram illustrating the principle of spraying using the cylindrical spray head in an embodiment of this utility model;

[0057] Appendix Figure 6 This is a schematic diagram of the structure of this utility model equipped with a telescopic rod.

[0058] In the attached diagrams: 1. Cylindrical spray head; 2. Handheld part; 3. Guide tube; 4. Axial flow fan; 41. Backward-curved guide vanes; 5. Spray nozzle; 6. Nozzle; 7. External rotor brushless motor; 8. Liquid supply pipe; 81. Connecting end; 9. Telescopic rod; 91. Telescopic ring; 10. Support; 11. Solenoid valve; 12. Water pipe connector; L1. Extension line of the spray direction of the nozzle; L2. Axis of the guide tube; L3. Center line of the water pipe connector; L4. Center line of the handheld part. Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0060] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0061] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0062] See appendix Figures 1-6 As shown, a long-range spraying misting machine includes a cylindrical spray head 1, which is connected to a hand-held part 2, and the cylindrical spray head 1 has a guide tube 3.

[0063] An axial flow fan 4 (assembled via a bracket 10) is coaxially mounted in the guide tube 3, with the air outlet side of the axial flow fan 4 facing forward.

[0064] The inner cavity of the guide tube 3 serves as the spray guide channel for the mist sprayer. The front end of the spray guide channel serves as the spray nozzle 5, and the rear end of the spray guide channel is positioned corresponding to the air outlet side of the axial fan 4. Preferably, the ratio of the diameter of the axial fan 4 to the width of the spray guide channel is 1:0.85.

[0065] It also includes several nozzles 6 for spraying liquid droplets, evenly distributed in a ring at equal angles outside the spray nozzle 5, forming a ring-shaped spray head. The number of nozzles 6 can be six, with a distribution angle preferably of 60° (see...). Figure 1 ).

[0066] The extension line L1 of the spray direction of each nozzle 6 forms an angle α with the axis L2 of the guide tube 3. For example... Figure 5 As shown, the included angle α can be 25°.

[0067] Preferably, the inner wall of the guide tube 3 tapers inward toward the air outlet direction to form an inward contraction angle β, such as... Figure 5 As shown, the degree of the inward contraction angle β can be 15°. The design of the inward contraction angle β can create a converging effect on the exhaust air, thereby generating higher air pressure. Through the synergistic effect with the spray angle α of the nozzle 6, the liquid can be sprayed to a greater distance.

[0068] Preferably, the drive unit of the axial fan 4 is an external rotor brushless motor 7, with a preferred speed of 80,000 r / min.

[0069] Preferred, such as Figure 3 As shown, the blades of the axial fan 4 are backward-curved guide vanes 41, numbering 12; the blade body is curved and undulating, with a helical angle of 15°±5°. Through the specific helical angle setting, the backward-curved guide vanes 41 can organize the airflow direction, sending the air out onto the guide tube 3, and through the inner contraction angle β of the guide tube 3, the airflow is converged, guided, and transported, ultimately enabling the liquid sprayed from the nozzle 6 to be sprayed further.

[0070] By employing backward-curved guide vanes 41 and rationally designing the blade curvature, the airflow within the impeller can be made smoother, reducing energy loss. This can reduce airflow separation and vortex formation, thereby increasing wind pressure.

[0071] Preferably, each of the nozzles 6 is connected to a liquid supply pipe 8, and the connection end 81 of the liquid supply pipe 8 and the cylindrical spray head 1 is recessed into the inner wall surface of the cylindrical cavity. This design ensures that the liquid supply pipe 8 delivers liquid to the nozzle while avoiding obstruction of the spray guide channel by the connection end 81, thereby ensuring smooth airflow.

[0072] Preferably, the liquid supply pipe 8 is connected to a solenoid valve 11, the other end of which is connected to a water pipe connector 12. The solenoid valve 11 controls the flow of water, effectively controlling the liquid spraying out and preventing liquid backflow.

[0073] Preferred, such as Figure 4 As shown, the centerline L3 of the water pipe connector 12 and the centerline L4 of the handheld part 2 form an angle γ, which can be 120°. The water pipe connector 12 extends from the tail of the handheld part 2, and the angle γ provides the operator with a better grip and is more ergonomic.

[0074] Preferably, the water pipe connector 12 is an M18 water pipe connector. It has good versatility and can be connected to most spray cans currently on the market. Besides the M18 water pipe connector 12, other water pipe connectors such as M16 can also be used in other embodiments.

[0075] Preferably, the device also includes a telescopic rod 9, which is fixed relative to the cylindrical spray head 1 to further extend the spraying distance of the mist sprayer. The telescopic rod 9 is provided with a telescopic ring 91 for adjusting the amount of extension and retraction of the telescopic rod 9.

[0076] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A long-range spraying mist blower characterized by: It includes a cylindrical spray head (1), which is connected to a hand-held part (2), and the cylindrical spray head (1) has a guide tube (3). An axial fan (4) is coaxially mounted in the guide tube (3), and the air outlet side of the axial fan (4) is arranged facing forward. The inner cavity of the guide tube (3) serves as the spray guide channel of the mist sprayer. The front end of the spray guide channel serves as the spray nozzle (5), and the rear end of the spray guide channel is set on the air outlet side of the axial fan (4). It also includes several nozzles (6) for spraying liquid droplets, which are evenly distributed in a ring at equal angles outside the spray nozzle (5); the extension line (L1) of the spraying direction of each nozzle (6) forms an angle α with the axis (L2) of the guide tube (3), and the angle α is an acute angle.

2. A long-range spraying mist blower according to claim 1, characterized in that: The included angle α is 25°±5°.

3. A long-range spraying mist blower according to claim 1, wherein: The inner wall of the guide tube (3) is drawn inward toward the air outlet direction to form an inward contraction angle β, the degree of which is 15°±5°.

4. A long-range spraying mist blower according to claim 1, wherein: The drive unit of the axial fan (4) is an external rotor brushless motor (7) with a speed of 40,000~80,000 r / min.

5. A long-range spraying atomizer according to claim 1 or 4, characterized in that: The blades of the axial fan (4) are backward-curved guide vanes (41), numbering 10 to 15, with the body in a curved and undulating shape and a spiral angle of 15°±5°.

6. A long-range spraying mist blower according to claim 1, wherein: Each of the nozzles (6) is connected to a liquid supply pipe (8), and the connection end (81) of the liquid supply pipe (8) and the cylindrical spray head (1) is recessed on the inner wall surface of the cylindrical cavity.

7. A long-range spraying mist blower according to claim 6, wherein: The liquid supply pipe (8) is connected to a solenoid valve (11), and the other end of the solenoid valve (11) is connected to a water pipe connector (12).

8. A long-range spraying mist blower according to claim 7, characterized in that: The centerline (L3) of the water pipe connector and the centerline (L4) of the handheld part form an angle γ, the degree of which is 120°±10°.

9. A long-range spraying mist blower according to claim 7, wherein: The water pipe connector (12) is an M18 water pipe connector.

10. A long-range spraying mist blower according to claim 1, wherein: It also includes a telescopic rod (9) which is fixed relative to the cylindrical spray head (1).

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