Cleaning device with self-cutting hair rolling brush

Abstract

The invention relates to the technical field of cleaning devices, in particular to a cleaning device with a hair self-breaking rolling brush, which comprises a shell and a rolling brush rotatably arranged in the shell, comb teeth are arranged on the shell, and the comb teeth are parallel to a rotating shaft of the rolling brush; the comb teeth are positioned behind the rolling brush; the rolling brush set can roll hair into the comb teeth, and resistance heating wires are arranged in the length direction of the comb teeth and electrically connected with a power source. The comb tooth structure separated from the rolling brush is arranged, the resistance heating wires are installed in the comb teeth, and the precise temperature control system is arranged, so that wound hair is fused by high temperature at the fixed comb teeth, and deformation caused by direct contact of the rolling brush with high temperature is avoided; the device has the advantages of effectively cutting wound hair, avoiding high-temperature deformation of a rolling brush material, improving the safety of equipment and prolonging the service life of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of cat litter boxes, in particular to a cleaning device with a self-hair-cutting roller brush and a cat litter box. Background Art

[0002] With the increasing demand for modern household cleaning, cleaning devices equipped with roller brushes, such as vacuum cleaners and robot vacuums, have become essential household appliances. These devices typically utilize a rotating roller brush coupled with negative pressure suction, sweeping floor debris into the suction channel through the rotation of the roller brush. However, in actual use, hair entanglement continues to plague users, especially those with long hair and pets.

[0003] Traditional solutions primarily involve two approaches: manual cleaning, which requires users to regularly disassemble the brush to remove entangled hair, a cumbersome process and prone to secondary contamination. Mechanical cutting devices, however, suffer from issues such as incomplete cutting and damage to the brush surface. While the recent emergence of resistance heating wire fusing technology has somewhat improved these issues, such as the axial resistance heating wire solution proposed in patent CN112741549A, it still has significant drawbacks.

[0004] The main issues with existing resistance heating wire technology lie in its installation location and structural design. Placing the wire directly on the brush surface can cause the brush material to deform under prolonged high temperatures, shortening the device's service life. Furthermore, the centrifugal force generated by the high-speed rotation of the brush can easily cause the wire to break. Furthermore, the lack of precise temperature control in the heating system can pose safety risks and fail to ensure consistent hair removal results. These issues have severely hampered the widespread adoption of resistance heating wire hair removal technology in cleaning equipment.

[0005] In view of the above problems, the existing technology is in urgent need of improvement. Summary of the Invention

[0006] The purpose of the present invention is to provide a cleaning device with a self-cutting hair roller brush and its temperature control system, which has the advantages of effectively cutting off entangled hair, avoiding high-temperature deformation of the roller brush material, and improving the safety and service life of the equipment.

[0007] The present invention provides a cleaning device with a self-hair-cutting roller brush, and the technical solution is as follows: it includes a shell and a roller brush rotatably arranged in the shell, comb teeth are arranged on the shell, and the comb teeth are arranged parallel to the rotating axis of the roller brush; the comb teeth are located behind the roller brush; the roller brush can roll hair into the comb teeth, and a resistance heating wire is provided in the length direction of the comb teeth, and the resistance heating wire is electrically connected to a power supply.

[0008] Furthermore, the present invention also proposes that the comb teeth include front comb teeth and rear comb teeth, and the resistance heating wire is arranged between the front comb teeth and the rear comb teeth, and is arranged parallel to the front comb teeth and the rear comb teeth.

[0009] Furthermore, the front comb teeth are arranged tangentially to the circumference of the roller brush, and the direction of the front comb teeth is opposite to the rolling direction of the roller brush.

[0010] Furthermore, the present invention also proposes that the shell includes an upper cover assembly and a lower cover assembly that are connected and matched with each other, the comb teeth are arranged on the upper cover assembly, and the lower cover assembly is arranged at the dust inlet corresponding to the roller brush.

[0011] Furthermore, the present invention also proposes that the comb teeth and the upper cover assembly are integrally formed.

[0012] Furthermore, the present invention also proposes that the resistance heating wire is installed inside the comb teeth through a spring, and the spring is configured to keep the resistance heating wire in a tensioned state.

[0013] Furthermore, the present invention also proposes that it further comprises a joint assembly, which is configured to be detachably connected to the surface cleaning device body.

[0014] Furthermore, the present invention also proposes that it also includes a temperature control system, which is electrically connected to the resistance heating wire. The operating temperature of the resistance heating wire is 300℃±20℃ and is controlled by the temperature control system.

[0015] Furthermore, the present invention also proposes that the temperature control system includes: a periodic power on and off module, which is configured to execute a "power on 10 seconds - power off 20 seconds" cycle after being triggered, and runs a total of 3 cycles; a temperature sensor, which is configured to cut off the power supply when it detects that the temperature of the resistance heating wire exceeds 320°C, and to connect the power supply when it is lower than 310°C.

[0016] Furthermore, the present invention also proposes that the comb teeth are made of high-temperature resistant materials, including but not limited to PBI plastic, and the temperature resistance range thereof is 400-500°C.

[0017] From the above, it can be seen that the present invention provides a cleaning device with a self-cutting hair roller brush and its temperature control system. By setting a comb tooth structure separated from the roller brush, installing a resistance heating wire inside the comb teeth and configuring a precise temperature control system, the entangled hair is melted by high temperature at the fixed comb teeth, avoiding deformation caused by direct contact with high temperature of the roller brush. It has the advantages of effectively cutting off entangled hair, avoiding high-temperature deformation of the roller brush material, and improving the safety and service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structural diagram of the present invention;

[0019] Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention;

[0020] Figure 3 It is a schematic diagram of the decomposition structure of the present invention.

[0021] In the picture:

[0022] 1. Upper cover assembly; 2. Lower cover assembly; 21. Dust inlet; 3. Roller brush; 4. Comb teeth; 41. Front comb teeth; 42. Rear comb teeth; 5. Resistance heating wire; 7. Hair; 8. Connector assembly; 9. Spring; 10. Housing. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described below with reference to the accompanying drawings and embodiments.

[0024] In the existing technology, with the popularization of cleaning equipment with roller brushes, the problem of hair entanglement has become a major obstacle affecting user experience. Traditional solutions rely on manual cleaning or blade cutting, which is cumbersome to operate and poses safety risks. Although the fusing technology based on resistance heating wire can improve efficiency, the design of directly integrating the resistance heating wire on the surface of the roller brush leads to problems such as high-temperature deformation of the material and mechanical stress fracture. For example, the roller brush material softens under continuous high temperature, affecting the rotation accuracy; the resistance heating wire fixing structure is easily damaged by centrifugal force when the roller brush rotates at high speed, resulting in circuit failure. These problems limit the practical application scenarios of this technology.

[0025] To address the above issues, the inventors of the present invention noticed that both high-temperature damage and mechanical stress are caused by direct contact between the resistance heating wire and the roller brush. By analyzing the hair winding path, it was found that the hair gathers axially when the roller brush rotates. If it can be guided to an independent area for processing, the impact on the roller brush can be avoided. This led to the design idea of ​​separating the heating system from the roller brush: constructing a hair breaking structure independent of the roller brush, using a directional combing mechanism to transfer the hair to a fixed area for centralized processing, and reducing the mechanical load by optimizing the layout of the heating elements.

[0026] Therefore, if Figure 1-3 As shown, the present invention provides a cleaning device with a self-cutting hair roller brush, comprising a housing 10 and a roller brush 3 rotatably disposed within the housing 10. The housing 10 is provided with comb teeth 4, which are arranged parallel to the rotation axis of the roller brush 3 and located behind it. The roller brush 3 can draw hair into the area of ​​the comb teeth 4. A resistance heating wire 5 connected to a power source is provided along the length of the comb teeth 4.

[0027] Among them, the shell 10 refers to the main frame that supports the roller brush 3 and comb teeth 4 structure, which can be specifically realized by a split injection molding process. For example, the upper cover assembly 1 and the lower cover assembly 2 are connected by a snap fastener to facilitate maintenance of internal components.

[0028] The comb teeth 4 refer to a plurality of spaced-apart protrusions, which can be specifically made of high-temperature resistant engineering plastic injection molding, or of course, metal materials. The comb teeth 4 can have a spacing of 1-3 mm to guide the directional movement of hair.

[0029] The resistance heating wire 5 refers to a metal conductor that can generate heat when energized, and can be specifically made of nickel-chromium alloy wire. It is maintained in a straight line by a spring 9 tensioning device to avoid deformation due to thermal expansion and contraction.

[0030] Specifically, when the roller brush 3 rotates to clean the floor, the hair 7 is caught in the gap between the roller brush and the comb teeth. Since the comb teeth 4 are located behind the roller brush 3 and are parallel to its axis, the hair 7 is continuously pushed to the comb teeth 4 area as the roller brush 3 rotates. The resistance heating wire 5 is arranged along the length of the comb teeth 4. When energized, it generates high temperature, which directly acts on the hair 7 wrapped between adjacent comb teeth. This layout fixes the resistance heating wire 5 to the stationary shell structure, avoiding mechanical damage to the resistance heating wire 5 caused by the centrifugal force generated by the rotation of the roller brush 3. At the same time, as an independent carrier, the material selection of the comb teeth 4 is not limited by the function of the roller brush 3, and a material with better high-temperature resistance than the roller brush 3 can be used.

[0031] The existing technology directly fixes the heating wire 5 to the surface of the roller brush 3, subjecting the roller brush 3 material to both high temperatures and mechanical stress. The present invention utilizes a separate design to decouple the working environment of the heating wire 5 from the movement of the roller brush 3. Specifically, the heating wire 5 is fixed to the housing 10, eliminating the mechanical stress caused by rotation while also preventing heat transfer to the roller brush 3 through the independent comb teeth 4. Furthermore, the directional guidance of the comb teeth 4 concentrates hair treatment in a specific area, improving thermal energy utilization efficiency compared to dispersed treatment across the roller brush surface.

[0032] This invention physically isolates the heating wire 5 from the roller brush 3, preventing high temperatures from degrading the brush 3's material properties. The stationary heating wire 5 avoids mechanical stress under rotating conditions, extending the life of the circuit system. The comb teeth 4's directional hair collection improves fusing efficiency and simplifies cleaning, eliminating the need for frequent brush removal.

[0033] The present invention further proposes that the comb teeth 4 include front comb teeth 41 and rear comb teeth 42 , and the resistance heating wire 5 is arranged between the front comb teeth 41 and the rear comb teeth 42 and is arranged parallel to the front comb teeth 41 and the rear comb teeth 42 .

[0034] Among them, the front comb teeth 41 refer to the comb tooth structure located behind the roller brush 3 and close to the dust inlet 21. Specifically, it can be realized by injection molding of polyetheretherketone material to guide the hair into the comb tooth gap. The rear comb teeth 42 refer to another set of comb teeth that are spaced apart from the front comb teeth 41 and form a clamping space. Specifically, they can be made of high-temperature resistant nylon material to support the resistance heating wire 5 and disperse mechanical stress. The parallel setting means that the extension direction of the resistance heating wire 5 maintains the same spatial orientation as the length direction of the front comb teeth 41 and the rear comb teeth 42. Specifically, it can be achieved by pre-embedding a wire groove in the comb tooth mold to ensure that the resistance heating wire 5 and the two sets of comb teeth form an equidistant heat conduction path.

[0035] Specifically, the front comb teeth 41 and the rear comb teeth 42 form a double-layer clamping structure, which draws hair into the gap between the two when the roller brush 3 rotates. The resistance heating wire 5 generates heat when energized, and conducts heat to the entangled hair 7 through the enclosed space formed by the front comb teeth 41 and the rear comb teeth 42. The rigid support structure of the front comb teeth 41 and the rear comb teeth 42 maintains a fixed distance between the resistance heating wire 5 and the roller brush 3, avoiding material softening caused by direct contact. The parallel arrangement of the resistance heating wires 5 forms a continuous heat field between the two groups of comb teeth, causing the entangled hair to melt simultaneously at the contact point.

[0036] The present invention effectively blocks the direct heat conduction of the heating working temperature to the roller brush 3 material, preventing the polymer material from softening and deforming due to long-term heat exposure. The double-layer structure of the front comb teeth 41 and the rear comb teeth 42 provides a stable mounting base for the resistance heating wire 5, avoiding the impact of the mechanical vibration generated by the rotation of the roller brush on the connection part of the resistance heating wire. The parallel resistance heating wire 5 forms a uniform heat field distribution in the gap between the comb teeth, ensuring that the root area of ​​the entangled hair can reach the melting temperature at the same time, thereby improving the hair cutting efficiency. The clamping effect of the comb teeth gap keeps the hair 7 in a tensioned state during the melting process, avoiding the problem of uneven local heating caused by loose hair.

[0037] The present invention further proposes that the front comb teeth 41 are arranged tangentially to the circumference of the roller brush 3, and the front comb teeth 41 point opposite to the rolling direction of the roller brush 3. The opposite direction refers to two roughly opposite directions. For example, when the roller brush 3 rolls upward on one side, the comb teeth 41 are arranged on the same side of the roller brush 3, and the comb teeth 41 point downward. With this arrangement, when the roller brush 3 rolls, the hair 7 is continuously pushed by the roller brush to the area between the front comb teeth 41 and between the front comb teeth 41 and the rear comb teeth 42, so that the resistance heating wire 5 can easily melt the hair 7. Of course, the present invention preferably arranges the front comb teeth 41 tangentially to the circumference of the roller brush 3. As long as the purpose of the invention can be achieved, other arrangements are also acceptable. For example, the tooth tips of the front comb teeth 41 are located on the circumference of the roller brush 3, and the front comb teeth 41 point opposite to the rolling direction of the roller brush 3, which can achieve the purpose of the invention.

[0038] The present invention further proposes that the housing 10 includes an upper cover assembly 1 and a lower cover assembly 2 that are connected and matched with each other, the comb teeth 4 are provided on the upper cover assembly 1, and the lower cover assembly 2 is provided at the dust inlet 21 corresponding to the roller brush 3.

[0039] The upper cover assembly 1 and the lower cover assembly 2 are assembled to form a housing 10 through a detachable connection, which can be achieved by snap-fitting or bolting. When the two are connected, a cavity space is formed to accommodate the roller brush. This split structure physically isolates the heating wire 5 from the roller brush 3.

[0040] Among them, the comb teeth 4 are arranged on the upper cover assembly 1, which means that the comb tooth component with the resistance heating wire 5 is fixed on the inner surface of the upper cover assembly 1. Specifically, it can be achieved by injection molding or screw fixing, so that the resistance heating wire 5 and the roller brush 3 remain in a non-contact state.

[0041] Among them, the dust inlet 21 is arranged on the lower cover assembly 2, which means that an opening corresponding to the axial extension direction of the roller brush 3 is opened on the bottom surface of the lower cover assembly 2. Specifically, it can be designed as a rectangular or arc-shaped opening structure, and a guide slope is set on the edge of the opening to enhance the negative pressure adsorption effect.

[0042] Specifically, the upper cover assembly 1 and the lower cover assembly 2 are detachably connected through a snap-on structure provided on the edge, and the two are assembled to form a closed cavity. The inner surface of the upper cover assembly 1 is integrally formed with comb teeth 4 by an injection molding process. The comb teeth 4 extend along the axis of the roller brush and maintain a gap of 2-5 mm with the outer surface of the roller brush. The width of the dust inlet 21 opened on the bottom surface of the lower cover assembly 2 matches the length of the roller brush, and a guide plate is provided on the rear side of the dust inlet 21 to guide the direction of the airflow. When the present invention is in operation, the centrifugal force generated by the rotation of the roller brush 4 throws the ground hair 7 to the comb teeth 4 area, and the heat generated by the power supply of the resistance heating wire 5 melts the hair 7 wrapped around the comb teeth 4, while the dust inlet 21 of the lower cover assembly 2 continues to inhale the cut hair debris.

[0043] The split housing 10 structure eliminates the need to disassemble the entire device for maintenance of the heating element 5, significantly improving maintenance efficiency and reducing operational difficulty. The independent placement of the dust inlet 21 ensures that the dust collection function is not affected by the layout of the heating element 5, maintaining a stable airflow path and negative pressure adsorption performance.

[0044] The present invention further proposes an integrated design of the comb teeth 4 and the upper cover assembly 1. The comb teeth 4, a rigid structure used to comb and guide hair 7, can be manufactured simultaneously with the upper cover assembly using an injection molding process, with the materials fused to form a single, integrated structure. This feature eliminates the risk of loosening due to aging or vibration of the connector by eliminating the need for separate assembly steps.

[0045] The integrated molding design achieves a seamless connection between the comb teeth 4 and the upper cover assembly 1 through mold injection molding, 3D printing, or hot pressing. Specifically, this can be achieved by integrally molding using high-strength, high-temperature-resistant materials such as polyetheretherketone (PEEK). This feature ensures consistent thermal expansion of the assembly in high-temperature environments through material continuity, preventing deformation caused by localized stress concentration.

[0046] Specifically, during operation, the integrated structure of the comb teeth 4 and the upper cover assembly 1 directly carries the high temperature generated by the resistive heating wire 5. Because both are made of the same material and have no assembly gaps, the thermal expansion coefficient of the entire structure remains consistent at an operating temperature of 300°C ± 20°C, avoiding the deformation differences caused by temperature differences between the contact surfaces of different materials in a split structure. In the mechanical vibration environment generated by the high-speed rotation of the roller brush 3, the integrated structure maintains a constant distance between the comb teeth 4 and the roller brush 3 by dispersing the internal stress of the material, ensuring the stability of the hair 7 entrainment and fusing process.

[0047] Through this technical solution, the present invention eliminates the risk of loosening of the split comb teeth 4 due to the complex assembly structure and avoids the safety hazards caused by failure of the connection parts in high-temperature environments. The one-piece molded structure, through the homogenization of the material, ensures that the comb teeth maintain geometric accuracy under long-term high-temperature operation, improving hair fusing efficiency and device reliability.

[0048] The present invention further proposes that the resistance heating wire 5 is installed inside the comb teeth 4 through a spring 9, and the spring 9 is configured to keep the resistance heating wire in a tensioned state.

[0049] The resistance heating wire 5 refers to a metal conductor that generates heat when energized, and can be specifically implemented using nickel-chromium alloy wire or iron-chromium-aluminum alloy wire, with a diameter ranging from 0.2 mm to 0.5 mm, for example, and melts the entangled hair through the electrothermal effect.

[0050] Among them, the spring 9 refers to a mechanical element with elastic deformation ability, which can be specifically realized by a stainless steel coil spring or a piano wire spring. Its elastic coefficient range is, for example, 5 N / mm to 20 N / mm, and the pre-tightening force maintains the straight shape of the resistance heating wire 5.

[0051] Specifically, the resistance heating wire 5 is arranged in the internal cavity of the comb teeth 4, and both ends or one end are connected to the fixed end of the comb teeth 4 through the spring 9. When the roller brush 3 drives the hair 7 to contact the comb teeth, the entangled hair is melted by the resistance heating wire 5. In this process, the spring 9 absorbs the thermal expansion and contraction caused by temperature changes through its own elastic deformation, and at the same time offsets the periodic mechanical vibration generated when the roller brush 3 rotates. When external foreign matter exerts a pulling force on the resistance heating wire, the spring 9 maintains the distance between the resistance heating wire 5 and the comb teeth 4 by adjusting the tension, avoiding breakage due to stress concentration.

[0052] Through the above technical solution, the present invention solves the problem of breakage of the heating wire 5 due to mechanical stress, while ensuring effective contact between the heating wire 5 and the hair 7. The heating wire 5 is always in a tensioned state under the restraint of the spring 9, preventing poor contact due to relaxation. The elastic compensation capability of the spring 9 can adapt to different temperature conditions and prevent structural failure caused by thermal deformation. The internal space of the comb teeth 4 provides physical protection for the heating wire 5, reducing the risk of damage caused by foreign objects collision or entanglement.

[0053] The present invention further provides a connector assembly 8 configured to be detachably connected to the main body of the surface cleaning device.

[0054] Among them, the connector assembly 8 refers to a modular structure for realizing mechanical connection and signal transmission between the cleaning device and the main equipment. Specifically, it can be realized by a snap-on connector structure or a magnetic connection structure, and the connection stability is ensured by the design of synchronous separation of physical limit and electrical contacts.

[0055] Among them, the detachable connection refers to a mechanical interface that can be assembled and separated without destructive operations. It can be achieved by using a rotary locking mechanism or a sliding rail quick-release structure, and can be adapted to different models of main equipment through standardized interface dimensions.

[0056] Through the above technical solution, the present invention achieves rapid separation and maintenance of the cleaning device from the main device, allowing component replacement without specialized tools. The standardized interface design allows the floor brush assembly to be compatible with a variety of main device models, effectively reducing the cost of component replacement for users. The detachable connection structure eliminates maintenance blind spots caused by traditional fixed installations, ensuring that entangled hair inside the roller brush can be thoroughly cleaned.

[0057] The present invention further proposes that a temperature control system (not shown in the figure) is electrically connected to the resistance heating wire 5, and the operating temperature of the resistance heating wire 5 is 300°C ± 20°C and is controlled by the temperature control system.

[0058] Among them, the temperature control system refers to a closed-loop control device for adjusting the temperature of the resistance heating wire 5, which can be specifically achieved by using a periodic power on and off module working in conjunction with a temperature sensor. After the periodic power on and off module is triggered, it executes a "power on 10 seconds - power off 20 seconds" cycle, running a total of 3 cycles, and preventing the resistance heating wire from being continuously high in temperature by intermittent power supply; the temperature sensor is configured to cut off the power supply when it detects that the temperature of the resistance heating wire 5 exceeds 320°C, and to connect the power supply when it is lower than 310°C, thereby controlling the temperature fluctuation range within the set range. The operating temperature of 300°C ± 20°C refers to the target temperature range of the resistance heating wire 5 during operation, which is specifically achieved by setting the temperature threshold and the on-off logic. This temperature range can not only ensure the hair fusing efficiency, but also prevent overheating damage to the material.

[0059] Specifically, the temperature control system monitors the temperature of the heating wire 5 in real time via a temperature sensor. When the temperature exceeds 320°C, it automatically cuts off the power supply to prevent the roller brush material from softening or deforming due to high temperature. When the temperature drops below 310°C, the power is restored to ensure the minimum temperature required to melt the hair. The periodic on-off module completes the hair-cutting operation within three cycles of "power on for 10 seconds and power off for 20 seconds." This not only reduces the continuous operating time of the heating wire 5, but also reduces the impact of mechanical stress on the heating wire 5 during the power-off interval. This forms a closed-loop control loop, stabilizing the heating wire temperature 5 within a range of 300°C ± 20°C, effectively melting the hair while avoiding material damage and wire breakage.

[0060] Through the above technical solution, the present invention solves the problem of damage to the roller brush material caused by the high temperature of the resistance heating wire 5. The temperature of the resistance heating wire 5 is maintained within a safe range through a closed-loop temperature control mechanism to prevent the material from softening or deforming. At the same time, intermittent power supply is used to reduce the mechanical stress of the resistance heating wire 5, avoid the risk of breakage, and ensure that the hair melting process is stable and reliable.

[0061] The present invention further proposes a temperature control system comprising a periodic power on / off module and a temperature sensor. When triggered, the periodic power on / off module executes a 10-second power-on-20-second power-off cycle, for a total of three cycles. The temperature sensor is configured to cut off power when it detects the temperature of the heating element exceeds 320°C, and reconnect it when it falls below 310°C.

[0062] The periodic on / off module is a circuit unit that controls the operating state of the heating element 5 through a preset time sequence. Specifically, it can be implemented using a microcontroller and a timer. By forcibly limiting the duration of power on, this module reduces the cumulative thermal damage to the brush material caused by the continuous high temperature of the heating element 5.

[0063] The temperature sensor is a device that monitors the temperature of the heating element 5 in real time and provides feedback to the control circuit. Specifically, it can be implemented using a K-type thermocouple or an infrared temperature measurement module. This sensor establishes a dual protection mechanism by setting a temperature threshold, cutting off power in the event of an unexpected abnormality, preventing short circuits or material carbonization.

[0064] Specifically, when the cleaning device starts the hair cutting function, the periodic power-on and power-off module first executes three fixed cycles of power-on for 10 seconds and power-off for 20 seconds. During this process, the resistance heating wire 5 heats up to the operating temperature range during the power-on stage and cools down naturally during the power-off stage. At the same time, the temperature sensor continuously collects temperature data of the resistance heating wire 5. When it detects that the temperature exceeds 320°C, the power supply is immediately cut off, and the power supply is restored after the temperature drops below 310°C. The two control mechanisms work together to ensure that the resistance heating wire 5 maintains a sufficient time within the effective operating temperature range to complete the hair melting, and avoids the risk of overheating through dual-dimensional limitations of time and temperature.

[0065] Through the above-mentioned technical solution, the present invention achieves precise control of the operating temperature of the heating element 5, effectively preventing softening and deformation of the roller brush material and damage to circuit components caused by excessive temperatures. Furthermore, the synergistic effect of the periodic on-off mode and temperature threshold control ensures the reliability of the hair cutting function while avoiding the energy waste and circuit loss caused by the frequent start-stop of traditional temperature control systems.

[0066] The present invention further proposes that the comb teeth 4 are made of high-temperature resistant materials, including but not limited to PBI plastic, with a temperature resistance range of 400-500°C.

[0067] Among them, high-temperature resistant materials refer to materials that can maintain stable physical and chemical properties in high-temperature environments. Specifically, this can be achieved by using PBI plastic, which can still maintain structural integrity in the range of 400-500°C.

[0068] Among them, the temperature resistance range of 400-500°C means that the lower limit of the temperature range that the material can withstand is not less than 400°C and the upper limit is not higher than 500°C. This can be achieved through a material modification process to ensure that this range completely covers the operating temperature of the resistance heating wire 5.

[0069] Specifically, when the comb teeth 4 come into contact with the resistance heating wire 5 with an operating temperature of 300°C, the use of high-temperature resistant materials can avoid softening or deformation of the material due to heat conduction. When the temperature fluctuation of the resistance heating wire 5 reaches 320°C, the temperature resistance margin of the high-temperature resistant material can still ensure that the comb teeth do not undergo thermal decomposition. When PBI plastic is used as the preferred material, its glass transition temperature is higher than 500°C, which can effectively resist long-term thermal stress. The range of material selection for the comb teeth 4 has been expanded to other polymer materials with equivalent temperature resistance, such as polyimide or ceramic composites, to meet the needs of different working conditions.

[0070] In some embodiments, the PBI plastic can be processed into a comb structure through injection molding, and its surface can be provided with a wear-resistant coating to extend its service life. In another embodiment, the ceramic composite comb teeth are manufactured through a sintering process and embedded with a metal skeleton to enhance mechanical strength.

[0071] The above-mentioned technical solution solves the problem of comb teeth 4 being susceptible to thermal deformation or damage in high-temperature environments. This ensures that the comb structure maintains geometric accuracy even under sustained high-temperature exposure, preventing a decrease in hair cutting efficiency due to material softening. The use of high-temperature-resistant materials extends the comb teeth's lifespan to over five times that of conventional materials, while maintaining sufficient mechanical strength to withstand the tensile forces generated by entangled hair 7.

[0072] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A cleaning device with a self-cutting hair roller brush, comprising a housing (10) and a roller brush (3) rotatably arranged in the housing (10), characterized in that: The housing (10) is provided with comb teeth (4), and the comb teeth (4) are arranged parallel to the rotation axis of the roller brush (3); The comb teeth (4) are located behind the roller brush (3); the roller brush (3) can roll the hair into the comb teeth (4). A resistance heating wire (5) is provided along the length direction of the comb teeth (4), and the resistance heating wire (5) is electrically connected to a power source.

2. A cleaning device with a self-cutting hair roller brush according to claim 1, characterized in that: The comb teeth (4) include front comb teeth (41) and rear comb teeth (42), and the resistance heating wire (5) is arranged between the front comb teeth (41) and the rear comb teeth (42), and is arranged parallel to the front comb teeth (41) and the rear comb teeth (42).

3. A cleaning device with a self-cutting hair roller brush according to claim 2, characterized in that: The front comb teeth (41) are arranged tangentially to the circumference of the roller brush (3), and the front comb teeth (41) point in a direction opposite to the rolling direction of the roller brush (3).

4. A cleaning device with a self-cutting hair roller brush according to claim 3, characterized in that: The housing (10) comprises an upper cover assembly (1) and a lower cover assembly (2) that are connected and matched with each other; the comb teeth (4) are arranged on the upper cover assembly (1); and the lower cover assembly (2) is arranged at a dust inlet (21) corresponding to the roller brush (3).

5. A cleaning device with a self-cutting hair roller brush according to claim 4, characterized in that: The comb teeth (4) and the upper cover assembly (1) are integrally formed.

6. A cleaning device with a self-cutting hair roller brush according to claim 5, characterized in that: The resistance heating wire (5) is installed inside the comb teeth (4) via a spring (9), and the spring (9) is configured to keep the resistance heating wire (5) in a tensioned state.

7. A cleaning device with a self-cutting hair roller brush according to claim 6, characterized in that: Also included is a joint assembly (8) configured to be detachably connected to the surface cleaning device body.

8. A cleaning device with a self-cutting hair roller brush according to any one of claims 1 to 8, characterized in that: It also includes a temperature control system, which is electrically connected to the resistance heating wire (5). The operating temperature of the resistance heating wire (5) is 300°C±20°C and is controlled by the temperature control system.

9. The cleaning device with a self-cutting hair roller brush according to claim 8, wherein the temperature control system comprises: The periodic power on / off module is configured to execute a "power on 10 seconds - power off 20 seconds" cycle after being triggered, for a total of three cycles; The temperature sensor is configured to cut off the power supply when it detects that the temperature of the resistance heating wire (5) exceeds 320°C, and to connect the power supply when it detects that the temperature is lower than 310°C.

10. The cleaning device with a self-cutting hair roller brush according to claim 8, characterized in that: The comb teeth (4) are made of high-temperature resistant materials, including but not limited to PBI plastic, and have a temperature resistance range of 400-500°C.

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