Self-priming electric bubble sprayer
The self-priming electric foam sprayer with a switching mechanism addresses the limited range and fatigue issues of conventional models by enabling two usage modes, enhancing usability and comfort.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- NINGBO AOKE PLASTICS CO LTD
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-07
Smart Images
Figure 0003256492000001_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of foam sprayers, particularly to self-priming electric foam sprayers.
Background Art
[0002] A foam sprayer is a practical tool that utilizes physical principles to thoroughly mix a liquid (such as detergent, car wash liquid, etc.) with air to generate fine and dense foam. It is widely applied in scenarios such as car washing, household cleaning, and gardening spraying. It is highly convenient, enabling labor-saving use. In order to improve the foaming effect, most commercially available foam sprayers use an electric self-priming structure that does not require manual drive by manpower.
[0003] However, conventional electric self-priming foam sprayers have only one usage mode and can only be used at close range while being continuously held within a certain range, so their application range is limited. Furthermore, when used for a long time, due to the weight of the sprayer itself and the weight of the liquid stored inside, the arm is easily fatigued, the operation fatigue level is high, and thus the comfort of use is low and the ergonomic effect is not good, so further improvement is needed.
Summary of the Invention
Problems to be Solved by the Invention
[0004] In view of the above current situation of the prior art, the technical problem that this utility model aims to solve is to provide a self-priming electric foam sprayer that has two usage modes, thereby expanding the application range, being simple and convenient to operate, reducing the operation fatigue level, and improving the comfort of use and the ergonomic effect.
Means for Solving the Problems
[0005] The technical solutions employed by this utility model to solve the above technical problems are as follows: A self-priming electric foam sprayer comprising a sprayer body, a housing detachably fixed to the top opening of the sprayer body, a foam generating unit and a control unit provided inside the housing and cooperating with each other, and a nozzle embedded on one side of the housing that communicates with the foam generating unit and sprays foam to the outside, wherein the control unit comprises a processing module, a switch fixed to the processing module and electrically connected to the processing module, and a battery electrically connected to the processing module. The foam generating unit comprises a foam pump, an inlet pipe, and an outlet pipe. One end of the inlet pipe is connected to the inlet port of the foam pump, and the other end of the inlet pipe extends downward through the bottom of the housing and into the interior of the sprayer body from the top opening of the sprayer body. One end of the outlet pipe is connected to the outlet port of the foam pump, and the other end of the outlet pipe is connected to the inlet port of the nozzle. The foam pump is electrically connected to the processing module. A switching mechanism is further provided between one end of the outlet pipe and the outlet of the foam pump, and the housing comprises a top cover and a base, which are installed vertically and fixed to each other so as to be removable, the switching mechanism is provided on the top cover, and a liquid separator is formed on the top of the top cover, which is installed vertically toward the inside of the top cover, and the opening at the end of the liquid separator is closed, The switching mechanism comprises a switching column that is movably inserted vertically into the separatory cylinder and is installed concentrically with the separatory cylinder, and a first connecting pipe and a second connecting pipe that are inserted into the outer wall on one side of the separatory cylinder, both communicating with the inside of the separatory cylinder and distributed vertically, the outlet of the foam pump is connected to the opening at the end of the second connecting pipe, and one end of the outlet pipe is connected to the opening at the end of the first connecting pipe. An annular groove is formed on the outer circumferential surface of the lower end of the switching column, and a height-adjustable annular flow space is formed between the annular groove and the inner circumferential surface of the separatory cylinder. The outer circumferential surfaces of the switching column near the inner walls on both the upper and lower sides of the annular groove are sealed to the inner circumferential surface of the separatory cylinder and are in close, slidable contact with it. A counterbore hole is drilled in the center of the lower end of the switching column, and correspondingly, the switching mechanism further comprises a third connecting pipe that is inserted into the outer wall on one side of the upper end of the switching column and communicates with the inside of the counterbore hole. The vertical distance between the first connecting pipe and the second connecting pipe coincides with the longitudinal width of the annular groove.
[0006] Preferably, when the annular groove is at its lowest point, the upper edge of the root opening of the first connecting pipe is not higher than the upper inner wall of the annular groove, and the lower edge of the root opening of the second connecting pipe is not lower than the lower inner wall of the annular groove.
[0007] Preferably, when the annular groove is at its highest point, the lower edge of the root opening of the first connecting pipe is not lower than the lower inner wall of the annular groove, and the upper edge of the root opening of the second connecting pipe is not higher than the lower end of the switching column.
[0008] Preferably, a sedimentation chamber is formed at the top of the top cover, facing inward, and the base opening of the separatory cylinder is provided on the inner wall at the bottom of the sedimentation chamber and communicates with the inside of the sedimentation chamber. Correspondingly, a cover plate is formed at the upper end of the switching column, which is installed laterally, and the cover plate is movably embedded in the opening of the sedimentation chamber.
[0009] Preferably, the third connecting pipe is located inside the sedimentation chamber when the annular groove is at its lowest point.
[0010] Preferably, a plurality of guide rods, vertically installed around the switching column, are further connected to the bottom of the sinking chamber, and the upper end of each guide rod is fixed to the lower outer wall of the cover plate.
[0011] Preferably, a stopper is formed at the lower end of each guide rod, and the outer diameter of the stopper is larger than the outer diameter of the guide rod.
[0012] Preferably, at least one arc-shaped notch is formed at the edge of the opening of the sedimentation chamber. [Effects of the Invention]
[0013] Compared to conventional technology, the advantages of this utility model are as follows: This utility model enables switching between two foam spraying methods via a switching mechanism, and further provides two usage modes. When normal short-distance or short-duration use is required, foam can be sprayed from the nozzle to the outside simply by pushing the switching column in the switching mechanism to its lowest position. When long-distance or long-duration use is required, foam can be sprayed from the third connecting pipe and the outer pipe to the outside by pulling the switching column in the switching mechanism to its highest position. This expands the range of application, makes operation simple and convenient, and allows the user to control the direction of foam spraying simply by holding the other end of the outer pipe. Because the weight of the other end of the outer pipe is much lighter than the weight of the sprayer itself and the weight of the liquid stored inside, arm fatigue is reduced even during prolonged use, thereby reducing operational fatigue and improving user comfort and ergonomic effectiveness. [Brief explanation of the drawing]
[0014] The above and other features, advantages and aspects of each embodiment of the present application will become more apparent by reference to the accompanying drawings and the following specific embodiments. Throughout the drawings, the same or similar reference numerals indicate the same or similar elements. It should be understood that the accompanying drawings are illustrative and the parts and elements are not necessarily drawn to scale. Here, [Figure 1] This is a top-view exploded structure diagram of the utility model. [Figure 2] This is a bottom perspective view of the top cover and switching mechanism of this utility model. [Figure 3] This is a vertical cross-sectional structural diagram of the switching mechanism of this utility model when the annular groove is at its lowest point. [Figure 4] This is a vertical cross-sectional structural diagram of the switching mechanism of this utility model when the annular groove is at its highest point. [Modes for carrying out the invention]
[0015] Unless otherwise defined, the technical or scientific terms used in this utility model have the ordinary meanings that a person skilled in the art would understand. The terms "first," "second," and similar terms used in this utility model do not indicate order, quantity, or importance, but are merely for distinguishing different components. Similar terms such as "equips" or "includes" mean that the element or component listed before "equips" or "includes" covers the element or component and equivalent listed after "equips" or "includes," and does not exclude other elements or components. Similar terms such as "connected" or "linked" include electrical connections, whether direct or indirect, and are not limited to physical or mechanical connections. "Up," "down," "left," "right," etc., are used merely to indicate relative positional relationships, and such relative positional relationships may change accordingly if the absolute position of the object being described changes.
[0016] In order to make the following description of the embodiments of this utility model clear and concise, this utility model omits detailed descriptions of known functions and known components.
[0017] As shown in Figures 1 to 4, the self-priming electric foam sprayer comprises a sprayer body 1, a housing 2 detachably fixed to the top opening of the sprayer body 1, a foam generation unit and a control unit provided inside the housing 2 and cooperating with each other, and a nozzle 7 embedded on one side of the housing 2 that communicates with the foam generation unit and sprays foam to the outside. The control unit comprises a processing module 3, a switch 4 fixed to the processing module 3 and electrically connected to the processing module 3, and a battery 5 electrically connected to the processing module 3. The foam generation unit comprises a foam pump 6, an inlet pipe 10, and an outlet pipe 9. One end of the inlet pipe 10 is connected to the inlet port of the foam pump 6, and the other end of the inlet pipe 10 extends downward through the bottom of the housing 2 and into the interior of the sprayer body 1 from the top opening of the sprayer body 1. One end of the outlet pipe 9 is connected to the outlet port of the foam pump 6, and the other end of the outlet pipe 9 is connected to the inlet port of the nozzle 7. The foam pump 6 is electrically connected to the processing module 3. By pressing switch 4, the processing module 3 can control the startup and stop of the foam pump 6. The battery 5 provides electrical energy for the operation of the foam pump 6. When the foam pump 6 starts, the liquid inlet of the foam pump 6 sucks the foaming liquid inside the sprayer body 1 through the liquid inlet pipe 10, generates foam inside the foam pump 6, and finally sends the generated foam into the nozzle 7 through the liquid outlet pipe 9, and then sprays it externally from the nozzle 7. A switching mechanism 8 is further provided between one end of the liquid outlet pipe 9 and the liquid outlet of the foam pump 6. The housing 2 includes a top cover 22 and a base 21 that are respectively installed in the vertical direction and are removably fixed to each other. The switching mechanism 8 is provided on the top cover 22. On the top of the top cover 22, a liquid separation cylinder 222 vertically installed toward the inside of the top cover 22 is formed. The opening at the end of the liquid separation cylinder 222 is closed. The switching mechanism 8 includes a switching column 81 that is movably inserted vertically in the liquid separation cylinder 222 and is installed concentrically with the liquid separation cylinder 222, and a first connecting pipe 83 and a second connecting pipe 82 that are inserted on the outer wall of one side of the liquid separation cylinder 222 and are both in communication with the inside of the liquid separation cylinder 222 and are distributed in the vertical direction respectively. The liquid outlet of the foam pump 6 is connected to the opening at the end of the second connecting pipe 82, and one end of the liquid outlet pipe 9 is connected to the opening at the end of the first connecting pipe 83. An annular groove 811 is opened on the outer peripheral surface of the lower end of the switching column 81. An annular flow space 813 with a variable height is formed between the annular groove 811 and the inner peripheral surface of the liquid separation cylinder 222. The outer peripheral surfaces of the switching column 81 near the inner walls on both the upper and lower sides of the annular groove 811 are both sealed and slidably adhered to the inner peripheral surface of the liquid separation cylinder 222. A counterbore 812 is opened at the center of the lower end of the switching column 81. Correspondingly, the switching mechanism 8 further includes a third connecting pipe 84 that is inserted on the outer wall of one side of the upper end of the switching column 81 and is in communication with the inside of the counterbore 812. The vertical distance between the first connecting pipe 83 and the second connecting pipe 82 is the same as the longitudinal width of the annular groove 811.
[0018] When the annular groove 811 is at the lowest point, the upper edge of the root opening of the first connecting pipe 83 is not higher than the upper inner wall of the annular groove 811, and the lower edge of the root opening of the second connecting pipe 82 is not lower than the lower inner wall of the annular groove 811.
[0019] When the annular groove 811 is at the highest point, the lower edge of the root opening of the first connecting pipe 83 is not lower than the lower inner wall of the annular groove 811, and the upper edge of the root opening of the second connecting pipe 82 is not higher than the lower end of the switching column 81.
[0020] On the top of the top cover 22, a sedimentation chamber 221 is formed towards the inside of the top cover 22. The root opening of the liquid separation cylinder 222 is provided on the bottom inner wall of the sedimentation chamber 221 and communicates with the inside of the sedimentation chamber 221. Correspondingly, on the upper end of the switching column 81, a horizontally installed cover plate 814 is formed. The cover plate 814 is movably embedded in the opening of the sedimentation chamber 221.
[0021] When the annular groove 811 is at the lowest point, the third connecting pipe 84 is provided inside the sedimentation chamber 221.
[0022] At the bottom of the sedimentation chamber 221, a plurality of guide rods 85 vertically installed so as to surround the switching column 81 further penetrate and are connected. The upper end of each guide rod 85 is fixed to the lower outer wall of the cover plate 814. This is to prevent the switching column 81 and the liquid separation cylinder 222 from rotating relative to each other and to ensure the verticality and stability of both during sliding.
[0023] At the lower end of each guide rod 85, a stopper 851 is formed. The outer diameter of the stopper 851 is larger than the outer diameter of the guide rod 85. This is to prevent the switching column 81 from rising excessively.
[0024] At least one arc-shaped notch 223 is formed at the edge of the opening of the sinking chamber 221 to facilitate finger insertion, so that when the cover plate 814 is embedded in the opening of the sinking chamber 221, the cover plate 814 can be easily pulled up with a finger, thereby enabling the switching column 81 to be pulled up.
[0025] A handle groove 211 extending downward is formed outward on one edge of the top opening of the base 21, and correspondingly, a handle cover 224 extending downward and fitting with the handle groove 211 is formed outward on the corresponding edge of the bottom opening of the top cover 22, and the opening of the handle cover 224 and the opening of the handle groove 211 are engaged with each other, the battery 5 is provided between the handle cover 224 and the handle groove 211, and the control unit is provided inside the base of the handle groove 211.
[0026] A lower nozzle receiver 212 is formed outward on one edge of the top opening of the base 21, positioned laterally and distributed diagonally with the handle groove 211. Correspondingly, an upper nozzle cover 225 is formed outward on the corresponding edge of the bottom opening of the top cover 22, positioned laterally and fitting together with the lower nozzle receiver 212. The lower opening of the upper nozzle cover 225 and the upper opening of the lower nozzle receiver 212 are joined together, and the nozzle 7 is provided between the upper nozzle cover 225 and the lower nozzle receiver 212.
[0027] A movable button 11 is further fitted into the upper base of the handle cover 224, located above the switch 4. The bottom of the button 11 extends into the interior of the base of the handle cover 224 and cooperates with the movable contact of the switch 4.
[0028] The instructions for use are as follows:
[0029] Normally, the foam generated by the foam pump 6 is transported through the outlet pipe 9 and then sprayed to the outside from the nozzle 7. This mode is only applicable to short-distance handheld use. If long-distance transport use is required, the switching column 81 can be raised by pulling up the cover plate 814 with a finger. Before this, the cover plate 814 is fitted into the opening of the settling chamber 221, and the annular groove 811 on the switching column 81 is at its lowest point. The opening of the counterbore hole 812 does not communicate with either the annular fluid space 813 or the base opening of the second connecting pipe 82, while the base openings of both the first connecting pipe 83 and the second connecting pipe 82 communicate with each other inside the annular fluid space 813. Therefore, before the switching column 81 is raised, the foam generated by the foam pump 6 enters the annular fluid space 813 through the second connecting pipe 82, then enters the outlet pipe 9 through the first connecting pipe 83, and is finally sprayed to the outside from the nozzle 7. However, when the switching column 81 rises to its highest point, the third connecting pipe 84 emerges from inside the sedimentation chamber 221 and is positioned above the opening of the sedimentation chamber 221, with one end of the long outer pipe 12 detachably connected to the end opening of the third connecting pipe 84. At this time, the base opening of the first connecting pipe 83 is not in communication with the annular fluid space 813, while both the opening of the counterbore hole 812 and the base opening of the second connecting pipe 82 are in communication with the inside of the end of the separatory cylinder 222. Subsequently, the foam generated by the foam pump 6 first enters the inside of the end of the separatory cylinder 222 through the second connecting pipe 82, then enters the third connecting pipe 84 through the counterbore hole 812, and finally is continuously sprayed to the outside from the outer pipe 12. Because the outer pipe 12 is long, the user can transport the foam generated by the foam pump 6 over long distances, making it convenient to use.
[0030] This utility model enables switching between two foam spraying methods via a switching mechanism 8, providing two usage modes. When normal short-distance or short-duration use is required, simply pushing the switching column 81 in the switching mechanism 8 to its lowest position allows foam to be sprayed outwards from the nozzle 7. When long-distance or long-duration use is required, raising the switching column 81 in the switching mechanism 8 to its highest position allows foam to be sprayed outwards from the third connecting pipe 84 and the outer pipe 12. This expands the range of application, makes operation simple and convenient, and allows the user to control the foam spraying direction simply by holding the other end of the outer pipe 12. Because the weight of the other end of the outer pipe 12 is much lighter than the weight of the sprayer itself and the weight of the liquid stored inside, arm fatigue is reduced even during prolonged use, thereby reducing operational fatigue and improving user comfort and ergonomic effectiveness.
[0031] Finally, it should be noted that the above embodiments are merely for illustrating the technical solutions of this utility model and do not limit it. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can modify the technical solutions described in each of the above embodiments or make equivalent substitutions for some of their technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of this utility model.
Claims
1. A self-priming electric foam sprayer comprising a sprayer body, a housing detachably fixed to the top opening of the sprayer body, a foam generating unit and a control unit provided inside the housing and cooperating with each other, and a nozzle embedded on one side of the housing that communicates with the foam generating unit and sprays foam to the outside, wherein the control unit comprises a processing module, a switch fixed to the processing module and electrically connected to the processing module, and a battery electrically connected to the processing module, The foam generating unit comprises a foam pump, an inlet pipe, and an outlet pipe. One end of the inlet pipe is connected to the inlet port of the foam pump, and the other end of the inlet pipe extends downward through the bottom of the housing and into the interior of the sprayer body from the top opening of the sprayer body. One end of the outlet pipe is connected to the outlet port of the foam pump, and the other end of the outlet pipe is connected to the inlet port of the nozzle. The foam pump is electrically connected to the processing module. A switching mechanism is further provided between one end of the outlet pipe and the outlet of the foam pump, and the housing comprises a top cover and a base, which are installed vertically and fixed to each other so as to be removable, the switching mechanism is provided on the top cover, and a liquid separator is formed on the top of the top cover, which is installed vertically toward the inside of the top cover, and the opening at the end of the liquid separator is closed, The switching mechanism comprises a switching column that is movably inserted vertically into the separatory cylinder and is installed concentrically with the separatory cylinder, and a first connecting pipe and a second connecting pipe that are inserted into the outer wall on one side of the separatory cylinder, both communicating with the inside of the separatory cylinder and distributed vertically, the outlet of the foam pump is connected to the opening at the end of the second connecting pipe, and one end of the outlet pipe is connected to the opening at the end of the first connecting pipe. An annular groove is formed on the outer circumferential surface of the lower end of the switching column, and a height-adjustable annular flow space is formed between the annular groove and the inner circumferential surface of the separatory cylinder. The outer circumferential surfaces of the switching column near the inner walls on both the upper and lower sides of the annular groove are sealed to the inner circumferential surface of the separatory cylinder and are in close, slidable contact with it. A counterbore hole is drilled in the center of the lower end of the switching column, and correspondingly, the switching mechanism further comprises a third connecting pipe that is inserted into the outer wall on one side of the upper end of the switching column and communicates with the inside of the counterbore hole. A self-priming electric foam sprayer characterized in that the vertical distance between the first connecting pipe and the second connecting pipe coincides with the vertical width of the annular groove.
2. The self-priming electric foam sprayer according to claim 1, characterized in that when the annular groove is at its lowest point, the upper edge of the base opening of the first connecting pipe is not higher than the upper inner wall of the annular groove, and the lower edge of the base opening of the second connecting pipe is not lower than the lower inner wall of the annular groove.
3. The self-priming electric foam sprayer according to claim 1, characterized in that when the annular groove is at its highest point, the lower edge of the base opening of the first connecting pipe is not lower than the lower inner wall of the annular groove, and the upper edge of the base opening of the second connecting pipe is not higher than the lower end of the switching column.
4. The self-priming electric foam sprayer according to claim 1, characterized in that a sedimentation chamber is formed at the top of the top cover, facing inward from the top cover, the base opening of the liquid separator is provided on the bottom inner wall of the sedimentation chamber and communicates with the inside of the sedimentation chamber, and correspondingly a cover plate is formed at the upper end of the switching column, which is installed laterally, and the cover plate is movably embedded in the opening of the sedimentation chamber.
5. The self-priming electric foam sprayer according to claim 4, characterized in that the third connecting pipe is provided inside the sedimentation chamber when the annular groove is at its lowest point.
6. The self-priming electric foam sprayer according to claim 4, characterized in that a plurality of guide rods, vertically installed around the switching column at the bottom of the sinking chamber, are further connected through it, and the upper end of each guide rod is fixed to the lower outer wall of the cover plate.
7. The self-priming electric foam sprayer according to claim 6, characterized in that a stopper is formed at the lower end of each of the guide rods, and the outer diameter of the stopper is larger than the outer diameter of the guide rod.
8. The self-priming electric foam sprayer according to claim 4, characterized in that at least one arc-shaped notch is formed at the edge of the opening of the sedimentation chamber.