A floor cleaning machine with a protective sleeve for a drying fan

Abstract

This application discloses a floor scrubber drying fan with a protective sleeve, characterized in that it includes: a motor, a moving impeller connected to the output end of the motor, a fixed impeller located on the outer front end of the motor, the fixed impeller partially surrounding the motor, the moving impeller located inside the front end of the fixed impeller, and a silicone sleeve located at the rear end of the motor, the silicone sleeve partially surrounding the rear end of the motor. The motor drives the moving impeller to rotate, and the moving impeller drives air to flow through the fixed impeller towards the rear end of the motor. By using the above method, a double physical sealing barrier is constructed through the partially surrounded fixed impeller and the silicone sleeve, placing the motor in a highly sealed space, blocking the channels for liquid and gaseous moisture in high temperature and high humidity environments to enter the motor, effectively solving core fault problems such as motor corrosion, short circuits, and insulation failure, improving the service life of the fan, and improving drying efficiency through the optimization of the guide vanes, eliminating the risk of dampness and mold.

Description

Technical Field

[0001] This utility model relates to the field of cleaning appliance fan technology, and in particular to a floor scrubber drying fan with a protective cover. Background Technology

[0002] Floor scrubbers have become one of the core appliances for modern home cleaning. Their self-cleaning function greatly enhances the user experience, but the efficiency and long-term reliability of the roller brush drying process are becoming increasingly prominent issues.

[0003] Current dryer fans generally employ an open impeller design (with a large gap between the impeller and the motor housing). During the drying process, the high temperature and humidity environment allows moisture to easily penetrate through these gaps into critical components such as the motor windings, bearings, and circuit boards. Moisture intrusion can lead to corrosion of internal motor components (such as windings and bearings), short circuits, decreased insulation performance, reduced efficiency, and even serious malfunctions such as motor burnout. Experimental data shows that in a simulated high temperature and humidity environment for floor scrubber drying, motors without effective protection experience a failure rate as high as 32% after 200 hours of continuous operation, resulting in a short service life.

[0004] Therefore, there is an urgent need to design a floor scrubber drying fan with a protective cover to solve one or more technical problems that are lacking in the existing technology. Summary of the Invention

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a floor scrubber drying fan with a protective sleeve, characterized in that it includes: a motor, the output end of the motor is connected to a moving impeller, a fixed impeller is provided on the outer side of the front end of the motor, the fixed impeller partially surrounds the motor, the moving impeller is located inside the front end of the fixed impeller, and a silicone sleeve is also provided at the tail end of the motor, the silicone sleeve partially surrounds the tail end of the motor, the motor drives the moving impeller to rotate, and the moving impeller drives air to flow through the fixed impeller towards the direction of the tail end of the motor.

[0006] In a preferred embodiment, the fixed impeller includes: an inner shell that partially surrounds the front end of the motor; an outer cylinder is provided on the outer side of the inner shell; the outer cylinder and the inner shell are spaced apart to form an air duct; and a plurality of spaced guide vanes are provided circumferentially between the outer cylinder and the inner shell; air is driven by the moving impeller to pass through the air duct.

[0007] In a preferred embodiment, some of the guide vanes are backward-curved blades.

[0008] In a preferred embodiment, the end of the silicone sleeve adjacent to the fixed impeller is tightly fitted with the end of the fixed impeller.

[0009] In a preferred embodiment, the outer side of the tail end of the motor housing is provided with a raised ring, and the inner side of the silicone sleeve is provided with a groove that matches the raised ring.

[0010] In a preferred embodiment, the gap width between the fixed impeller and the motor is 0.5mm-2mm, and the gap is a labyrinthine or stepped non-linear path.

[0011] In a preferred embodiment, the tilt angle of the guide vane is 30°-55°.

[0012] The beneficial effects of this utility model are: by constructing a double physical sealing barrier through a semi-enclosed impeller and silicone sleeve, the motor is placed in a highly sealed space, blocking the channels for liquid and gaseous moisture in the high temperature and high humidity environment to invade the motor, effectively solving the core fault problems such as motor corrosion, short circuit, and insulation failure, improving the service life of the fan, and improving drying efficiency through the optimization of the guide vanes, eliminating the hidden dangers of dampness and mold. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the structure of the fixed impeller of this utility model; Figure 4 This is a plan view of the silicone sleeve of this utility model in conjunction with the motor.

[0014] In the picture: 10. Motor; 11. Moving impeller; 12. Fixed impeller; 13. Inner shell; 14. Guide vane; 15. Outer cylinder; 16. Silicone sleeve; 17. Protrusion; 18. Groove. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0017] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0018] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0019] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] like Figures 1-4As shown, this utility model provides a floor scrubber dryer fan with a protective sleeve, characterized in that it includes: a motor 10, the output end of which is connected to a moving impeller 11, a fixed impeller 12 provided on the outer side of the front end of the motor 10, the fixed impeller 12 partially surrounding the motor 10, the moving impeller 11 located inside the front end of the fixed impeller 12, and a silicone sleeve 16 provided at the tail end of the motor 10, the silicone sleeve 16 partially surrounding the tail end of the motor 10, the motor 10 driving the moving impeller 11 to rotate, and the moving impeller 11 driving air to flow through the fixed impeller 12 towards the direction of the tail end of the motor 10; Specifically, the output end of the motor 10 is connected to a moving impeller 11, which drives the moving impeller 11 to rotate. A fixed impeller 12 is provided at the front end of the motor 10. The fixed impeller 12 is annular and partially surrounds the front end of the motor 10. The moving impeller 11 is located inside the front end of the fixed impeller 12. When the motor 10 runs, it drives the moving impeller 11 to rotate, causing air to flow through the fixed impeller 12 to the rear end of the motor 10. At the same time, a silicone sleeve 16 is provided at the rear end of the motor 10, which partially surrounds the rear end of the motor 10. Together with the fixed impeller 12, a double physical barrier is constructed. Through the cooperation of the fixed impeller 12 and the silicone sleeve 16, the motor 10 is placed in a highly sealed space, blocking the channels for liquid and gaseous moisture in the high temperature and high humidity environment to enter the interior of the motor 10. This effectively solves the core fault problems of the motor 10 such as corrosion, short circuit, and insulation failure.

[0021] Furthermore, the fixed impeller 12 includes: an inner shell 13, which partially surrounds the front end of the motor 10; an outer cylinder 15 is provided on the outer side of the inner shell 13; the outer cylinder 15 and the inner shell 13 are spaced apart to form an air duct; a plurality of spaced guide vanes 14 are provided along the circumference between the outer cylinder 15 and the inner shell 13; and air is driven by the moving impeller 11 to pass through the air duct. Specifically, the fixed impeller 12 includes an inner shell 13 with one end open, which partially surrounds the front end of the motor 10. An outer cylinder 15 with both ends open is provided on the outside of the inner shell 13. The outer cylinder 15 is located outside the inner shell 13 and is spaced apart from the inner shell 13 to form an air duct for air to pass through. Several guide vanes 14 are provided circumferentially between the inner shell 13 and the outer shell. When the moving impeller 11 drives the air to pass through the air duct, the guide vanes 14 can make the air flow more smoothly released. The guide vanes 14 also function as heat dissipation fins. Heat is transferred from the outer shell of the motor 10 to the inner shell 13 and the guide vanes 14, and is dissipated by the flowing air.

[0022] Furthermore, some of the aforementioned guide vanes 14 are backward-curved blades; Specifically, to reduce airflow separation and eddy generation, the guide vane 14 adopts backward-curved blades, which makes it more in line with airflow dynamics, increases wind pressure and air volume, reduces flow noise and energy loss, and enables hot air to dry the roller brush more quickly, evenly and effectively.

[0023] Furthermore, the end of the silicone sleeve 16 adjacent to the fixed impeller 12 is tightly fitted with the end of the fixed impeller 12; Specifically, to prevent moisture from entering through the gap between the silicone sleeve 16 and the impeller 12, the silicone sleeve 16 and the impeller 12 are interference-fitted to prevent moisture from entering. To prevent the silicone sleeve 16 from shifting due to vibration during motor 10 operation, a protrusion 17 is provided on the outer side of the motor 10, and a groove 18 that matches the protrusion 17 is provided on the inner side of the silicone sleeve 16. The interlocking fit between the protrusion 17 and the groove 18 restricts the displacement of the silicone sleeve 16 and prevents seal failure. The tail end cover of the motor 10 is provided with a terminal for external electrical connection. The terminal protrudes through the silicone sleeve 16, and the position where the terminal protrudes through the silicone sleeve 16 is sealed, which can be achieved by interference fit or other methods. The silicone sleeve 16 restricts axial and rotational movement through the terminal and the protrusion 17.

[0024] Furthermore, the gap width between the fixed impeller 12 and the motor 10 is 0.5mm-2mm, and the gap is a labyrinthine or stepped non-linear path; Specifically, in this embodiment, the gap width between the impeller 12 and the motor 10 is within 0.5mm-2mm. In order to increase the resistance to water penetration, the path of the gap can preferably be a non-linear path such as a labyrinth or stepped path. By passing through the tortuous channel, the fluid flow resistance is increased and the fluid energy is consumed, thereby achieving a sealing effect. The labyrinth sealing structure and the stepped sealing structure are existing technologies. They can be referenced from the structures used in pumps, compressors, turbines, gearboxes, and automobile engine crankcases to prevent lubricating oil leakage or the intrusion of external contaminants, so they will not be described in detail here.

[0025] Furthermore, the tilt angle of the guide vane 14 is 30°-55°; Specifically, the tilt angle of the guide vane 14 is 30°-55°, preferably 40°-50°. Within this range, the airflow flows smoothly within the impeller 12 with minimal separation loss, effectively converting mechanical energy into pressure energy and kinetic energy. It also results in higher wind pressure, a flat power curve that is less prone to overload, and relatively low noise. If higher wind pressure is required, the tilt angle of the guide vane 14 can be set to 30°-40° or 50°-55° to achieve a larger air volume, depending on the actual usage requirements.

[0026] In summary, by constructing a double physical sealing barrier through the semi-enclosed impeller 12 and silicone sleeve 16, the motor 10 is placed in a highly sealed space, blocking the channels for liquid and gaseous moisture in the high temperature and humidity environment to enter the motor 10. This effectively solves the core fault problems of motor 10 such as corrosion, short circuit, and insulation failure, and improves the service life of the fan. Furthermore, the optimization of the guide vane 14 improves the drying efficiency and eliminates the risk of dampness and mold.

[0027] This invention is not limited to the description in the specification and embodiments. Therefore, other advantages and modifications can be readily realized by those skilled in the art. Thus, without departing from the spirit and scope of the general concept as defined by the claims and their equivalents, this invention is not limited to the specific details, representative devices and illustrated examples shown and described herein.

Claims

1. A floor scrubber dryer fan with a protective cover, characterized in that, include: The motor has a moving impeller connected to its output end and a fixed impeller on the outer side of its front end, which partially surrounds the motor. The moving impeller is located inside the front end of the fixed impeller. A silicone sleeve is also provided at the rear end of the motor, which partially surrounds the rear end of the motor. The motor drives the moving impeller to rotate, and the moving impeller drives air to flow through the fixed impeller toward the rear end of the motor.

2. The floor scrubber dryer fan with protective cover according to claim 1, characterized in that, The fixed impeller includes: an inner shell that partially surrounds the front end of the motor; an outer cylinder is provided on the outside of the inner shell; the outer cylinder and the inner shell are spaced apart to form an air duct; and a number of spaced guide vanes are provided along the circumference between the outer cylinder and the inner shell. Air is driven by the moving impeller to pass through the air duct.

3. The floor scrubber dryer fan with protective cover according to claim 2, characterized in that, Some of the aforementioned guide vanes are backward-curved blades.

4. The floor scrubber dryer fan with protective cover according to claim 1, characterized in that, The silicone sleeve is in close contact with the end of the fixed impeller at one end.

5. The floor scrubber dryer fan with protective cover according to claim 1, characterized in that, The outer side of the tail end of the motor housing is provided with a raised ring, and the inner side of the silicone sleeve is provided with a groove that matches the raised ring.

6. The floor scrubber dryer fan with protective cover according to claim 1, characterized in that, The gap width between the fixed impeller and the motor is 0.5mm-2mm, and the gap is a labyrinthine or stepped non-linear path.

7. The floor scrubber dryer fan with protective cover according to claim 3, characterized in that, The tilt angle of the guide vane is 30°-55°.

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