Pet grooming machine

Abstract

Provided in the present invention is a pet grooming machine, comprising: a housing, which is internally provided with an air duct having at least one air duct inlet and at least one air duct outlet; an electric blower, which forms, within the air duct, an airflow that enters from the at least one air duct inlet and exits from the at least one air duct outlet; a battery, which supplies power to the electric blower; a combing member, which includes at least one set of comb teeth, the comb teeth having a retracted state and an extended state; and a movement area, which is located outside the air duct, communicates the at least one air duct outlet with the at least one air duct inlet, and provides a space for state switching of the comb teeth, wherein in the retracted state, tips of the comb teeth are close to the housing; in the extended state, the tips of the comb teeth are away from the housing; an air outlet of the electric blower is closer to the tips of the comb teeth in the extended state than an air inlet of the electric blower; and at least part of the airflow flowing from the air duct outlet passes through the comb teeth in the retracted state and flows into the at least one air duct inlet.

Description

Pet care machine Technical Field

[0001] The present invention relates to an animal brushing or management device, and more particularly to a pet care machine. Background Art

[0002] Many people love cats, but at the same time, they are bothered by their excessive hair. Ordinary vacuum cleaners cannot absorb loose hair from cats, and once the loose hair falls to the ground, it is difficult to clean because it is scattered everywhere. CN201523596U Ecovacs has launched a pet-specific vacuum cleaner. Using an AC vacuum cleaner with a special comb, it can comb out loose hair from cats and dogs, and suck the loose hair on the comb teeth into the vacuum cleaner before the loose hair falls to the ground. However, this technology is more suitable for dogs and less suitable for cats. This is because dogs are more obedient and willing to obey their owners' wishes, walk to the vacuum cleaner to be combed, and are more likely to accept the noise of ordinary vacuum cleaners. However, cats are more independent, and it is difficult to get them to obey their owners' wishes at all times and be combed quietly at a specific time and place. In addition, many cats are also more sensitive and find it difficult to accept the noise of ordinary vacuum cleaners.

[0003] Therefore, there is a need on the market for a quieter vacuum cleaner that is easy to move and suitable for combing cat hair anytime and anywhere, while also having sufficient suction power to suck away the combed loose hair before it falls to the ground. Summary of the Invention

[0004] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a pet care device.

[0005] <Option 1>

[0006] The present invention provides a pet care machine, comprising: a casing, wherein an air duct is provided inside, having at least one air duct inlet and at least one air duct outlet; an electric fan, for stirring air and forming an airflow in the air duct that flows in from at least one air duct inlet and flows out from at least one air duct outlet; a combing component, comprising at least one group of comb teeth; the comb teeth have a stored state and an extended state; a movement area, located outside the air duct, connecting at least one air duct outlet and at least one air duct inlet, and providing space for the comb teeth to switch between the extended state and the stored state; wherein, in the stored state, the tooth tips of the comb teeth are stored in the movement area, close to the casing; in the extended state, the tooth tips of the comb teeth extend outward relative to the movement area, away from the casing, for combing pet hair; at least a portion of the airflow flowing out of at least one air duct outlet passes through the comb teeth in the stored state and flows into at least one air duct inlet.

[0007] According to the pet care machine involved in the first solution of the present invention, because the movement area provides space for the comb teeth to switch between the extended state and the stored state, and the movement area is connected to at least one air duct outlet and at least one air duct inlet, at least a portion of the airflow flowing out of the air duct outlet passes through the comb teeth in the stored state and flows into the at least one air duct inlet. Therefore, the airflow flowing out of the air duct outlet can effectively cause the hair to detach from the comb teeth, and the detached hair is more likely to enter the air duct along with the suction airflow formed by the negative pressure at the air duct inlet, thereby effectively cleaning the combed pet hair. In addition, because the airflow at the air duct outlet can assist the hair to detach from the combing component, the smaller suction force at the air duct inlet can suck in the floating hair, and a lower-power electric blower can be used, thereby reducing noise. This solution has a simple structure and is easy to move, making it suitable for combing cats anytime and anywhere.

[0008] <Option 2>

[0009] The present invention also provides a pet care machine, comprising: a casing, wherein an air duct is provided inside, having at least one air duct inlet and at least one air duct outlet; an electric blower, for stirring air and forming an airflow in the air duct that flows in from at least one air duct inlet and flows out from at least one air duct outlet; a battery, for providing electrical energy to the electric blower; a combing component, comprising at least one group of comb teeth; the tooth tips of the comb teeth extend outward relative to the casing, for combing pet hair; wherein the air outlet of the electric blower is closer to the tooth tips in the extended state than the air inlet of the electric blower; the casing has a grip for a user to hold, and at least a portion of the electric blower or the battery is located inside the grip.

[0010] According to the second embodiment of the present invention, the pet care device is located closer to the extended tooth tips than the blower's air inlet, and at least a portion of the blower or battery is located within the grip. This minimizes the overall size of the pet care device while leaving ample space between the blower's air inlet and the air duct entrance to accommodate hair entering the duct. The pet care device's accommodating chamber is sufficiently large, making it easy to grip, operate with one hand, and be portable.

[0011] The pet care machine provided by the present invention may further include a movement area that provides space for hair to enter at least one air duct inlet; the movement area is located outside the air duct and connects at least one air duct outlet and at least one air duct inlet. This allows the airflow from the air duct outlet to pull hair away from the comb teeth. The released hair is then easily drawn into the air duct by the negative pressure created by the air duct inlet, effectively cleaning the combed pet hair. Furthermore, because the airflow from the air duct outlet assists in pulling hair away from the combing elements, the air duct inlet can draw in loose hair with minimal suction, allowing the use of a low-power electric blower, thereby reducing noise.

[0012] <Option 3>

[0013] Furthermore, the present invention provides a pet care machine, comprising: an electric blower for stirring air to generate airflow and negative pressure, comprising an electric blower air inlet and an electric blower air outlet; a battery for providing electrical energy to the electric blower; a switch for controlling the on-off of the circuit between the battery and the electric blower; a combing component for combing pet hair, comprising at least a base and comb teeth; a driving mechanism for driving the combing component so that the combing component switches between an extended state and a retracted state; a dust collecting mechanism located upstream of the electric blower for accommodating pet hair; a movement area, close to the combing component, providing space for the combing component to switch between an extended state and a retracted state ; The air duct is used to circulate the air flow generated by the electric blower, and has an air duct inlet and an air duct outlet. The air duct inlet is close to the downstream of the movement area, and the air duct outlet is close to the upstream of the movement area. At least a part of the air flow generated by the electric blower reaches the movement area through the air duct outlet, wherein the distance from the air inlet of the electric blower to the combing component is greater than the distance from the air outlet of the electric blower to the combing component. When in the extended state, the comb teeth extend outward relative to the main body of the pet care machine for combing pet hair. At this time, the movement area is open. When in the stored state, the comb teeth are close to the main body of the pet care machine, and the comb teeth point to the air duct inlet. At this time, more parts of the movement area are blocked by the combing component.

[0014] According to the pet care machine involved in the third solution of the present invention, because it includes an electric blower, a battery, a combing component, a driving mechanism, a dust collecting mechanism, a movement area and an air duct, the air duct is connected end to end through the movement area, and at least a portion of the airflow flowing out of the air duct outlet can flow into the air duct inlet. In the extended state, the comb teeth extend outward relative to the main body of the pet care machine to comb the pet's hair. At this time, the movement area is open, and fresh air flows from the outside of the pet care machine through the movement area into the air duct inlet, and finally flows into the movement area through the air duct outlet, connecting with the atmosphere outside the pet care machine. In the stored state, the combing component is close to the main body of the pet care machine, and the comb teeth point to the air duct inlet. At this time, a portion of the movement area is blocked by the combing component, and the outside air enters the air duct inlet through the tips of the comb teeth, passes through the interior of the air duct and flows out from the air duct outlet. At least a portion of the outflowing airflow enters the air duct inlet along the combing component through the tips of the comb teeth to form a circulating airflow, so that airflow enters the air duct inlet on both sides of the tips of the comb teeth, thereby effectively removing the loose hair stuck to the tips of the comb teeth.

[0015] In addition, as long as the battery has sufficient power, the user can comb the kitten at any time and any place without forcing the kitten to move near the pet care machine, which is very convenient to use.

[0016] In addition, because the distance from the air inlet of the electric blower to the combing component (shortest vertical) is greater than the distance from the air outlet of the electric blower to the combing component in the extended state (shortest vertical), that is, the air inlet of the electric blower is far away from the combing component, that is, far away from the air duct inlet, the electric blower is in an inverted posture relative to the air duct inlet, which makes it easier to ensure that the pet care machine is relatively small and not too long, so that the driving mechanism of the combing component can be controlled with one hand.

[0017] In any of the embodiments of the present invention, the pet care device may further include the following features: the comb teeth can be configured to switch states by rotating (swinging), extending, or retracting, or by a combination of multiple motions. The state switching drives the floating hairs toward the housing and into the movement area, thereby facilitating the floating hairs to enter the air duct inlet.

[0018] The pet care device provided by any embodiment of the present invention may further include a battery for providing power to the electric blower; wherein the air outlet of the electric blower is closer to the tips of the teeth in the extended state than the air inlet of the electric blower; and the housing has a grip for a user to hold, with at least a portion of the electric blower or the battery located within the grip. This arrangement makes the pet care device compact, easy to operate with one hand, and portable.

[0019] The pet care machine provided by any embodiment of the present invention may further include an auxiliary air inlet, comprising at least one air inlet hole disposed on the housing and communicating with the air duct. When high-speed air flows through the air duct, due to the low pressure of the fluid, some external air can enter the air duct through the air inlet hole, increasing the ventilation volume within the air duct, helping to remove hair adhering to the tips of the comb teeth, and also reducing the temperature of the circulating airflow.

[0020] In any of the embodiments of the present invention, the pet care machine may further include an auxiliary air inlet disposed between the air outlet of the electric blower and at least one air duct outlet. This not only prevents a decrease in negative pressure at the air duct inlet but also increases the exhaust volume at the air duct outlet, thereby further facilitating the removal of hair from the combing member.

[0021] The pet care device provided by any embodiment of the present invention may further include a power adjustment mechanism that adjusts the fan power to W1 when the comb teeth are extended, and adjusts the fan power to W2 when the comb teeth are retracted, where W2 > W1. The fan power can be further reduced in the extended state, thereby further reducing noise and extending battery life.

[0022] The pet care machine provided by any of the embodiments of the present invention may further include a drive mechanism for driving the combing member and the power adjustment mechanism, so that the state transition of the comb teeth and the power adjustment of the electric blower are synchronized, thereby making it easier for users to operate the machine with one hand.

[0023] The pet care machine provided by any one of the solutions of the present invention may also have the following feature: when the combing member undergoes state transition, the power adjustment mechanism is triggered to adjust the power, which makes it easier for the user to operate with one hand.

[0024] The pet care machine provided by any of the embodiments of the present invention may further include: a dust collection mechanism disposed in the air duct, between the air inlet of the electric blower and the air duct inlet, for collecting combed pet hair; wherein the air duct has two layers, the electric blower is disposed in the upper layer, and the air duct inlet is located in the lower layer, and the dust collection mechanism extends from near the air inlet of the electric blower to near at least one of the air duct inlets. This structural arrangement makes the storage chamber sufficiently large to accommodate more floating hair, and the overall volume, length, and width of the care machine can be minimized, making it easy for users to operate with one hand and more portable.

[0025] The pet care machine provided by any embodiment of the present invention may also have the following features: an air inlet filter is provided upstream of the electric blower, and a thin plate with small holes is provided upstream of the air inlet filter. The thin plate extends from near the air inlet filter along the air duct to near at least one air duct inlet; negative pressure transmission areas with small holes are formed on the thin plate in directions perpendicular to the air duct and in directions non-perpendicular to the air duct. The thin plate increases the air inlet filtration area and the number of air inlet filtration paths, allowing the pet care machine to filter and contain as much floating hair as possible.

[0026] The pet care device provided by any embodiment of the present invention may also have the following features: the comb teeth have a windward portion closer to the air duct outlet than the tooth tips; the windward end of the windward portion facing the air duct outlet is used to guide airflow and may be pointed or curved, or a guide groove may be provided in the area of ​​the windward portion extending toward the tooth tips. When hair accumulates at the tooth tips, the appearance becomes fluffy. When stored, the windward portion further facilitates guiding airflow from the air duct outlet to push the hair away from the comb teeth.

[0027] The pet care machine provided by any one of the schemes of the present invention may also have the following characteristics: wherein, the air duct inlet is far away from the base in the combing component and close to the downstream of the movement area, the air duct outlet is close to the base in the combing component and also close to the upstream of the movement area, at least a part of the airflow generated by the electric blower reaches the movement area through the air duct outlet, when the electric blower is started in the extended state, fresh air flows from the outside of the pet care machine through the movement area into the air duct inlet, and finally reaches the movement area through the air duct outlet, when the electric blower is started in the stored state, the outside atmosphere enters the air duct inlet through the tip of the comb teeth, and flows out from the air duct outlet through the air duct, and at least a part of the airflow flowing out of the air duct outlet enters the air duct inlet along the combing component through the tip of the comb teeth to form a circulating airflow.

[0028] The pet care machine provided by any one of the schemes of the present invention may also have the following features: wherein, the combing component also includes a scraper, the comb teeth extend outward from the base, and the combing component can be rotated from an extended state to a retracted state. In the extended state, the scraper is close to the base and away from the comb teeth. During the rotation of the combing component from the extended state to the retracted state, the scraper passes over the roots of the comb teeth and moves toward the tips of the comb teeth. In the retracted state, the scraper is close to the tips of the comb teeth and blocks at least a portion of the gap between the comb teeth.

[0029] In the pet care machine provided by any one of the schemes of the present invention, it may also have the following features: wherein, the driving mechanism abuts against the base, and a spring is provided between the two. In the extended state, the scraper is arranged on the periphery of the base, and the combing component also includes a swinging member, which has two swing arms. One end of the two swing arms is rotatably mounted on the main body of the care machine, and the other end is connected to the scraper. The comb teeth are arranged on the base. When the driving mechanism pushes the base to rotate, the swinging member rotates with the base, driving the scraper to move over the root of the comb teeth toward the tip of the comb teeth, and the combing component is converted from the extended state to the stored state.

[0030] The pet care machine provided by any one of the schemes of the present invention may also have the following features: wherein, two springs are provided between the driving mechanism and the base, respectively referred to as the first spring and the second spring. In the extended state, both springs are in a free state. When the driving mechanism moves after being pressurized, the first spring is compressed and the second spring is stretched. When the pressure on the driving mechanism is released, the two springs are reset respectively, the first spring pushes the driving mechanism to reset, and the second spring pulls the base to reset to the extended state.

[0031] The pet care machine provided by any one of the schemes of the present invention may also have the following features: an air inlet filter is provided upstream of the electric blower, and a thin plate with small holes is provided upstream of the air inlet filter. At least a portion of the periphery of the thin plate is sealed to the inner wall of the air duct, and a gap is left between the leeward side of the perforated area of ​​the thin plate and the inner wall of the air duct. The negative pressure generated by the electric blower can reach the leeward side of the thin plate, and then reach the windward side of the thin plate through the small holes, so that the air in the inhaled air flow can flow to the air inlet filter through the small holes on the thin plate, and the floating hair entrained in the air flow can be intercepted by the small holes on the thin plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of the three-dimensional structure of the pet care machine in an extended state according to Embodiment 1 of the present invention;

[0033] FIG2 is a schematic diagram of the three-dimensional structure of the pet care machine in the storage state according to Example 1 of the present invention;

[0034] FIG3 is a schematic diagram of the pet care machine in Example 1 of the present invention with the accommodating cavity open in the storage state;

[0035] FIG4 is a cross-sectional schematic diagram of the pet care machine in the extended state according to Embodiment 1 of the present invention;

[0036] FIG5 is a right side view of the pet care machine in the extended state according to Embodiment 1 of the present invention;

[0037] FIG6 is a bottom view of the pet care machine in the extended state according to Embodiment 1 of the present invention;

[0038] FIG7 is a schematic diagram of the three-dimensional structure of the pet care machine in Example 1 of the present invention after a thin plate with holes is added;

[0039] FIG8 is a schematic cross-sectional view of the pet care machine in Example 1 of the present invention after a thin plate with holes is added;

[0040] FIG9 is a schematic structural diagram of the power regulating mechanism in Example 2 of the present invention; wherein, (b) omits the fixing plate and the first spring relative to (a). DETAILED DESCRIPTION

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments will be used in conjunction with the accompanying drawings to specifically illustrate the pet care machine of the present invention.

[0043] <Example 1>

[0044] As shown in Figures 1 to 4, this embodiment provides a pet care machine 100 for caring for a pet's hair. The pet care machine 100 includes a main housing 10, an electric blower 11, a battery 12, a switch 13, an air duct 14, a circuit board 15, a combing component 18, a driving mechanism 19, a dust collection mechanism and a movement area 141.

[0045] The main housing 10 has a handle 101. The handle 101 is hollow inside and serves as a part of the air duct 14. The handle 101 forms a grip portion for a user to hold.

[0046] The electric blower 11 is arranged inside the main housing 10 and is partially located inside the handle 101, and is used to stir the air to generate airflow and negative pressure. The electric blower 11 includes an electric blower air inlet, which is close to the air inlet filter 143 and away from the combing component 18. The electric blower 11 also includes an electric blower air outlet, which is away from the air inlet filter 143 and close to the combing component 18. The electric blower 11 can adopt a high-speed brushless axial flow electric blower with a power of 40W or higher and a speed of 60,000 revolutions per minute or higher. This electric blower 11 has low noise and large air volume. The low noise will not scare the kitten, and the large air volume can effectively blow away the floating hair on the tooth tip (under the premise of using the pet care machine 100 of the present invention).

[0047] The battery 12 is disposed inside the handle 101 and is used to provide power to the electric blower 11. As shown in Figure 4, the battery includes two rechargeable batteries.

[0048] In this embodiment, the air duct 14 has two layers, the upper and lower layers, the electric blower 11 is arranged in the upper layer, the air duct inlet 144 is located in the lower layer, and the dust collection mechanism extends from near the electric blower air inlet to near the air duct inlet 144. As shown in Figure 4, the electric blower air outlet is closer to the tooth tips in the extended state than the electric blower air inlet. Otherwise, if the electric blower 11 is arranged in the lower layer and the electric blower air inlet is closer to the tooth tips in the extended state than the electric blower air outlet, the electric blower air inlet must face the exercise area 141, and the dust collection chamber between the electric blower air inlet and the exercise area 20 will be too small to effectively collect hair. If a sufficiently large dust collection chamber is to be established, the main housing 10 will be oversized. If the electric blower 11 and the battery 12 form an electric blower assembly, at least a portion of the electric blower assembly is located inside the handle 101. This arrangement makes the length and width of the main housing 10 as small as possible, and the dust collecting chamber is large enough, and the main housing 10 is small enough to be easy to hold and portable.

[0049] The circuit board 15 is disposed in the handle 101 , is electrically connected to the battery 12 and the electric blower 11 , and is used to control the operation of the electric blower 11 .

[0050] The switch 13 is provided in the main housing 10 for controlling the circuit board 15 , thereby controlling the on / off of the circuit between the battery 12 and the electric blower 11 .

[0051] The combing member 18 is at least partially located inside the main housing 10 and is used to comb pet hair. The combing member 18 includes at least a plurality of comb teeth 181 , with gaps being provided between adjacent comb teeth 181 .

[0052] The driving mechanism 19 is used to drive the combing member 18 so that the combing member is switched between an extended state and a retracted state.

[0053] The dust collecting mechanism is a receiving chamber 142, which is arranged inside the main housing 10 as part of the air duct 14 and located upstream of the electric blower 11 for receiving combed pet hair. An air inlet filter 143 is also provided upstream of the electric blower 11 for filtering pet hair.

[0054] As shown in Figure 3, the main housing 10 is also equipped with a rotatable cleaning cover 102. By opening the cleaning cover 102, hair collected in the storage chamber 142 can be discarded. In this embodiment, the cleaning cover 102 is located on the right side of the pet care machine 100. The cleaning cover 102 is fastened to the main housing 10 by a buckle or other structure. After the buckle is opened, the cleaning cover 102 can be flipped open.

[0055] The motion area 141 is provided in the main housing 10 and is in communication with the exterior of the main housing 10. The motion area 141 is provided close to the combing member 18 to provide a space for the combing member 18 to switch between the extended state and the retracted state.

[0056] The air duct 14 is disposed within the main housing 10 and is used to circulate the airflow generated by the blower 11. It has an air duct inlet 144 and an air duct outlet 145. The air duct inlet 144 is located downstream of the movement area 141 and away from the base 183 of the combing member 18. The air duct outlet 145 is located near the base 183 of the combing member 18 and upstream of the movement area 141. At least a portion of the airflow generated by the blower 11 reaches the movement area 141 through the air duct outlet 145. The air duct 14 flows from the movement area 141 from beginning to end, and at least a portion of the airflow exiting the air duct outlet 145 flows into the air duct inlet 144. The airflow entering the air duct inlet 144 flows through the accommodating chamber 142, the air inlet filter 143, and the blower 11 in sequence before exiting the air duct outlet 145. During this process, hair is filtered by the air inlet filter 143 and falls into the accommodating chamber 142.

[0057] As shown in Figure 1, in the extended state, the comb teeth 181 of the combing member 18 extend outward from the main housing 10 to comb the pet's hair. At this time, the movement area 141 is open, and fresh air flows from the outside of the pet care machine 100 through the movement area 141 into the air duct inlet 144, and finally flows into the movement area 141 through the air duct outlet 145, and is connected to the atmosphere outside the pet care machine 100.

[0058] As shown in FIG2 , in the retracted state, the combing member 18 is retracted within the movement area 141, with the comb teeth 181 pointing toward the air duct inlet 144. At this point, more of the movement area 141 is blocked by the combing member 18, and the outside air enters the air duct inlet 144 through the tips of the comb teeth 181, passes through the interior of the air duct 14, and flows out of the air duct outlet 145. At least a portion of the airflow flowing out of the air duct outlet 145 flows along the combing member 18 through the tips of the comb teeth 181 into the air duct inlet 144, forming a circulating airflow. This simultaneously blows the hair adhering to the tips of the comb teeth 181 into the air duct inlet 144. The cross-sectional area of ​​the air duct inlet 144 is preferably as large as possible, and the ventilation area of ​​the air duct 14 is also preferably as large as possible.

[0059] As shown in Figures 1 and 4-6, in this embodiment, the combing member 18 further includes a base 183 and a scraper 182. The combing member 18 can rotate from an extended state to a retracted state. In the extended state, the scraper 182 is positioned closer to the base 183 and farther away from the comb teeth 181. During the rotation of the combing member 18 from the extended state to the retracted state, the scraper 182 moves over the base of the comb teeth 181 toward the tips of the comb teeth 181. In the retracted state, the scraper 182 is positioned closer to the tips of the comb teeth 181, blocking at least a portion of the spaces between the comb teeth 181. The scraper 182 primarily closes the spaces between the comb teeth 181, concentrating airflow onto the tips of the comb teeth 181. It also squeezes hair adhering to the comb teeth 181, effectively blowing the hair adhering to the tips of the comb teeth 181 into the air duct 14. This facilitates the entry of hair into the air duct 14.

[0060] As shown in Figure 4, the base 183 is arranged at the edge of the movement area 141 and close to the air duct outlet 145. The base 183 abuts the drive mechanism 19, and two springs are provided between the two, which are respectively recorded as the first spring 191 and the second spring 192. In the extended state, both springs are in a free state. When the drive block 17 moves downward after being compressed, the first spring 191 is compressed and the second spring 192 is stretched. After the pressure on the drive block 17 is released, the two springs are reset respectively. The first spring 191 pushes the drive block 17 upward, and the second spring 192 pulls the base 183 to reset to the extended state. The scraper 182 is mounted on the outer periphery of the base 183. The combing component 18 also includes a swinging member 184. The swinging member 184 has two swing arms, one end of which is mounted on the housing 10 and can rotate, and the other end is fixedly connected to the scraper 182. The comb teeth 182 are arranged on the base 183 and extend in a direction away from the base 183 as shown in Figures 5 and 6. The width of the comb teeth 182 arranged left and right on the base 183 does not exceed the left and right width of the air duct inlet 144, so that when in the stored state, the direction of the air flow flowing through all the comb teeth 182 is basically parallel to the extension direction of the comb teeth 182, which is convenient for blowing away the floating hair adhering to the tips of the comb teeth 182.

[0061] The main portion of the drive mechanism 19 is disposed within the main housing 10, with a portion located outside the main housing 10 as the drive block 17. When the user presses the drive block 17, the drive mechanism 19 rotates the base 183, compressing the first spring 191 and stretching the second spring 192. The rotation of the base 183 simultaneously rotates the scraper 182, causing the scraper 182 to move past the base of the comb teeth 181 toward the tip of the comb teeth 181, transitioning the combing member 18 from an extended state to a retracted state. When the user releases the drive block 17, the spring between the drive mechanism 19 and the base 183 resets, forcing the combing member 18 to return from the retracted state to the extended state, causing the swinging member 184 and the drive block 17 to reset, and causing the scraper 182 to swing back from the tip of the comb teeth to the periphery of the base 183.

[0062] The pet care machine 100 may also include a locking mechanism (not shown) for retaining the combing member 18 in the stowed state, thereby reducing packaging volume. This locking mechanism is a common locking structure and will not be described in detail here. Activating the locking mechanism retains the combing member 18 in the stowed state, preventing the drive block 17 from extending the combing member 18. The combing member 18 can only be restored to the extended state when the locking mechanism is deactivated.

[0063] The use process of the pet care machine 100 of this embodiment is as follows:

[0064] The user can charge the battery with a charging cable. When the battery has sufficient power, the user can start the electric blower 11 through the switch 13, hold the pet care machine 100 through the handle 101, and release the combing member 18 through the locking mechanism, so that the combing member 18 is in an extended state. Then, the user can comb the hair on the pet's body, especially the hair of a kitten. In the extended state, the combing member 18 extends toward the front and lower part of the pet care machine 100, and the movement area 141 is fully opened. The air outside the pet care machine 100 enters the air duct inlet 144 from the movement area 141, flows through the accommodating chamber 142 and the air inlet filter 143 in the air duct 14, reaches the electric blower 11, and then flows through the battery 12 and the circuit board 15. Then, the air turns and flows out of the air duct 14 from the air duct outlet 145 to reach the movement area 141, and is connected to the atmosphere outside the pet care machine 100.

[0065] When the tips of the comb teeth 181 of the combing member 18 are stained with loose hair, the user can press the driving block 17 with the thumb while holding the handle 101, so that the combing member 18 rotates from the extended state to the retracted state.

[0066] When in the storage state, the combing member 18 is basically parallel to the bottom surface of the pet care machine 100, and the tips of the comb teeth 181 point to and are close to the air duct inlet 144. At this time, the combing member 18 blocks more parts of the movement area 141, and the scraper 182 closes at least part of the gap between adjacent comb teeth, while pushing the hair on the combing member 18 to gather toward the tips of the comb teeth 181. The outside atmosphere enters the air duct inlet 144 through the tips of the comb teeth 181, passes through the inside of the air duct 14 and flows out from the air duct outlet 145. At least a part of the outflow airflow enters the air duct inlet 144 along the combing member 18 through the tips of the comb teeth 181 to form a circulating airflow, so that airflow enters the air duct inlet 144 on both sides of the upper and lower sides of the tips of the comb teeth 184, thereby effectively peeling off the floating hair stuck to the tips of the comb teeth 181.

[0067] When in the extended state, external air can flow smoothly through the electric fan 11, and the electric fan can be fully cooled.

[0068] In the stowed position, some of the airflow passing through the electric blower 11 re-enters the air duct inlet 144, forming a circulating airflow. Because the electric blower 11 has low power and generates relatively little heat, the battery 12 can last approximately 30 minutes when operating at full power, preventing the electric blower 11 from overheating. In the stowed position, the air duct inlet 144 is more blocked from the outside atmosphere than in the extended position, but not completely cut off. Therefore, fresh air from the outside still enters the air duct 14 and reaches the electric blower 11, which also prevents the electric blower 11 from overheating.

[0069] In addition to the duct inlet 144 and duct outlet 145 at both ends of the duct 14, air inlet holes may be provided on the housing enclosing the duct 14, connecting these holes to the duct 14. When high-speed air flows through the duct 14, due to the low pressure of the fluid, some external air enters the duct 14 through the air inlet holes, increasing the ventilation volume within the duct 14 and helping to blow away hair adhering to the tips of the comb teeth 181. These air inlet holes are preferably located between the blower outlet and the combing member 18.

[0070] As shown in Figures 7 and 8, the air inlet filter 143 is located in the air duct 14 upstream of the electric blower inlet and close to the electric blower inlet. In order to facilitate one-handed operation, the pet care machine 100 needs to be compact, so the cross-sectional area of ​​the air inlet filter 143 along the direction perpendicular to the air duct is also relatively small. After the hair accumulates on the upstream surface of the air inlet filter 143, it is easy to block the air inlet filter and cut off the air duct 14. Therefore, this embodiment can also provide a thin plate 147 with small holes upstream of the air inlet filter 143. At least a part of the outer periphery of the thin plate 147 is sealed with the inner wall of the air duct 14. There is a gap between the leeward side of the perforated area of ​​the thin plate 147 and the inner wall of the air duct 14. The negative pressure generated by the electric fan 11 can reach the leeward side of the thin plate 147 with small holes, and then reach the windward side of the thin plate 147 through the small holes, so that the air in the inhaled air flow can flow to the air inlet filter 143 through the small holes on the thin plate 147, and the floating hair entrained in the air flow can be intercepted by the small holes on the thin plate 147.

[0071] Floating hairs in the airflow can be intercepted by the mesh (small holes) on the thin plate 147. Dust that may be carried in the airflow can penetrate the mesh but can be intercepted by the air inlet filter 143. The thin plate 147 and the mesh can extend from the air inlet filter 143 all the way to the air duct inlet 144, which is equivalent to increasing the area of ​​the air inlet filtration so that the accommodating chamber 142 can accommodate more floating hairs.

[0072] The thin plate 147 with small holes can be rectangular or arc-shaped. It can be one small piece, two small pieces or multiple small pieces, or it can cover the entire inner wall of the air duct 14.

[0073] 8 , the thin plate 147 is provided by sealingly connecting the entire periphery of the thin plate 147 to the inner wall of the air duct 14. In actual use, the front periphery of the thin plate 147 may be sealedly connected to the inner wall of the air duct 14, and the rear periphery of the thin plate 147 may be integrated with the air inlet filter 143.

[0074] Because it is a rechargeable pet care machine 100, as long as the battery 12 has sufficient power, the user can comb the kitten at any time and any place. There is no need to force the kitten to move near the pet care machine. Instead, the user can hold the pet care machine 100 close to the kitten's location. Even when on the move during a trip, such as in a moving car, the user can comb the kitten's hair and absorb the loose hair into the receiving chamber.

[0075] Some kittens are sensitive to noise. The noise of axial-flow high-speed brushless motors is much lower than that of centrifugal motors commonly used in vacuum cleaners, so they are more suitable for combing kittens.

[0076] <Example 2>

[0077] In this embodiment 2, the same reference numerals are used for the same structures as those in the embodiment 1, and the same descriptions are omitted.

[0078] In this second embodiment, a power adjustment mechanism 20 is added to the pet care machine 100 of the first embodiment. The power adjustment mechanism 20 is used to adjust the power of the electric blower 11 to W1 when the comb teeth 181 are extended, and to W2 when the comb teeth 181 are retracted, where W2 > W1. W2 is the operating power of the electric blower 11 in the first embodiment, and W1 can be set to 1 / 4 to 1 / 3 of W2 (not limited to this).

[0079] The power regulating mechanism 20 can regulate the power of the electric blower 11 by adjusting the resistance or voltage in the electric blower circuit. As shown in FIG9 , the power regulating mechanism 20 includes a pressing block 21 and a micro switch 22 .

[0080] The pressure block 21 is mounted on a drive rod 193 of the drive mechanism 19. The upper end of the drive rod 193 is connected to the drive block 17, and the lower end is used to rotate the swing member 184. A first spring 191 is mounted in the middle of the drive rod 193. The drive rod 193 can drive the pressure block 21 and the upper end of the first spring 191 to move up and down relative to the fixed plate 194.

[0081] Microswitch 22 corresponds to pressure block 21. When pressure block 21 moves downward, it contacts and triggers microswitch 22 to open. Conversely, when pressure block 21 moves upward, it moves away and closes microswitch 22. Microswitch 22 is connected to fan 11 via an electrical circuit or wireless communication. When microswitch 22 is turned on, fan 11's power is adjusted to W2. When microswitch 22 is turned off, fan 11's power is adjusted to W1.

[0082] Specifically, in the micro switch 22, the connection end of the pressing piece 221 is correspondingly arranged near the pressing block 21, and the operating end A of the pressing piece 221 is tilted relative to the contact 222. During the downward movement of the pressing block 21, it will contact and push the connection end forward, and the connection end drives the operating end A to move quickly toward the contact 222. When the operating end A contacts the contact 222, the micro switch 22 is turned on, and it is assumed that the downward movement distance of the pressing block 21 at this time is L; conversely, when the pressing block 21 moves up a distance L, the pressing block 21 leaves the connection end, the operating end A leaves the contact 222, the micro switch 22 is closed, and the power adjustment mechanism 20 and the drive mechanism 19 are both reset.

[0083] In this embodiment, the drive mechanism 19 simultaneously drives the combing member 18 and the power adjustment mechanism 20, so that the state transition of the comb teeth 181 and the power adjustment of the electric blower 11 are synchronized. In other words, when the user presses the drive block 17, the drive mechanism 19 not only drives the combing member 18 to transition from the extended state to the retracted state, but also drives (triggers) the power adjustment mechanism 20 to adjust the power of the electric blower 11 from W2 to W1. Conversely, when the user releases the drive block 17, the drive mechanism 19 and the power adjustment mechanism 20 are both reset, the combing member 18 transitions from the retracted state to the extended state, and the power of the electric blower 11 is adjusted back from W1 to W2.

[0084] Furthermore, in the present invention, the power adjustment mechanism can be triggered by the combing member rather than the drive mechanism, and the pressure block can be omitted. For example, when the combing member switches from the extended state to the stowed state, the combing member contacts the microswitch to turn it on, and when it switches from the stowed state to the extended state, the combing member releases the microswitch to turn it off. This allows the user to simultaneously operate the combing member and the power adjustment mechanism with a single action, achieving both state transition and power adjustment simultaneously.

[0085] Furthermore, in the present invention, in order to better allow the airflow at the air duct outlet to flow to the comb teeth, one or more comb teeth can be configured to have a windward portion that is closer to the air duct outlet relative to the tooth tip; the windward end of the windward portion facing the air duct outlet is a pointed or arc-shaped guide end, so that the airflow at the air duct outlet can flow smoothly from the guide end to the comb teeth; or a guide groove is provided on the area extending from the windward portion to the tooth tip, each guide groove corresponds to one or more comb teeth, and the airflow is guided to blow toward the hair on the comb teeth through the guide groove.

[0086] In addition, in the above embodiments, scrapers are provided corresponding to the comb teeth. In the present invention, scrapers can also be omitted. By simply relying on suction at the air duct inlet and blowing at the air duct outlet in the movement area, it is possible to ensure that the hair is separated from the comb teeth and enters the air duct inlet. This arrangement fully utilizes the power of the axial flow electric blower. Although the negative pressure at the air duct inlet is lower than that of a centrifugal electric blower, the airflow at the air duct outlet can assist in stripping loose hair from the comb teeth. The airflow at the air duct outlet blows and pushes, while the airflow at the air duct inlet sucks and pulls, and the combined force strips the loose hair. As long as the loose hair is separated from the comb teeth, the negative pressure transmitted to the air duct inlet by the axial flow electric blower is sufficient to cause the loose hair to fly toward the air duct inlet, thus effectively cleaning the loose hair.

[0087] In addition, in the above embodiments, the combing component performs state transition by swinging. In the present invention, the state transition of the combing component can also be performed in a telescopic manner. For example, the telescopic manner can be specifically that a through hole corresponding to the comb teeth is opened on the top plate of the movement area, and the comb teeth can move up and down relative to the top plate; when the comb teeth move downward by a certain distance, the tooth tips extend out of the movement area and also extend out of the housing, thereby being able to perform a combing action; when the comb teeth move upward by a certain distance, the tooth tips retract into the movement area or retract into the top plate. During this process, a scraper is formed on the surface area of ​​the top plate corresponding to the comb teeth, which can scrape off the floating hair on the comb teeth. The aforementioned through hole can be one or more, and one through hole can correspond to a group of comb teeth, or one through hole can only correspond to one or more comb teeth in each group of comb teeth. In addition, multiple rows of comb teeth can be provided on the base of the combing component, and the multiple rows of comb teeth can be arranged at intervals along the rotation direction of the combing component or in other directions.

[0088] Furthermore, in the exercise area, the air duct outlet can be located opposite to the air duct inlet, near the comb teeth, or facing only the comb teeth. For telescopic comb teeth, where the air duct outlet faces the comb teeth from above, the through hole in the top plate of the exercise area can be used as the air duct outlet.

[0089] In addition, in the present invention, the air duct inlet can be trumpet-shaped to receive the floating hairs that are peeled off and blown away by the tooth tips.

[0090] In addition, in the above embodiment, corresponding to the two-layer air duct, the main housing is also divided into upper and lower layers, and the user's hand can pass through the hollow area between the two layers to grasp the upper layer. In the present invention, the main housing can also be unlayered and without a hollow area, with only a concave shape for the user to grasp, so that the height of the nursing machine can be further reduced.

[0091] In addition, in the above embodiments, the conversion of the comb teeth between the extended state and the retracted state is performed by a single-handed operation, that is, each state conversion of the comb teeth requires a single-handed operation. In the present invention, the state conversion can also be performed automatically according to the use of the pet care machine instead of manually. For example, a sensor and a controller are set. When it is sensed that the pet care machine is within a certain distance from the pet, the controller automatically controls the comb teeth to enter the extended state. Conversely, when it is sensed that the pet care machine is a certain distance away from the pet, the controller automatically controls the comb teeth to enter the retracted state. In addition, the sensing parameters of the sensor are not limited to distance, but can also be other parameters, such as the force condition of the comb teeth (duration or frequency of force). According to the force condition of the comb teeth, it is determined whether the pet care machine is used to comb the pet's hair. If so, the controller controls the comb teeth to remain in the extended state to comb the pet's hair. Otherwise, the controller controls the comb teeth to enter the retracted state.

[0092] In addition, in the above embodiment, the air duct has only one air duct inlet and one air duct outlet. In the present invention, the air duct can have multiple air duct inlets and outlets. The air flow stirred by the electric blower can circulate through all the air duct inlets and all the air duct outlets at the same time, or it can circulate through only one or several air duct inlets and one or several outlets. For example, the number of air duct inlets and air duct outlets opened can be adjusted according to the amount of pet hair or body shape to adjust the air volume, wind speed and ventilation position. Or the number of air duct inlets and outlets can be adjusted according to the different states of the comb teeth. For example, in the storage state, only the air duct inlet facing the comb teeth is opened to allow the air flow to be more concentrated to clean the loose hair on the comb teeth. In addition, in the above embodiment, both ends of the handle are connected to the main housing. In the present invention, the handle can also be connected to the main housing at only one end, and the other end can be separated from the main housing by a certain distance. In this case, an open area is formed between the other end of the handle and the main housing.

[0093] In addition, in the above embodiments, the handle is part of the air duct. In the present invention, the handle can also be provided independently of the air duct. For example, an independent handle can be provided near the air duct, and the air duct does not pass through the handle, similar to the handle of a suitcase. In addition, the handle can be detachable or have various shapes and sizes, and can be installed according to the user's needs during use, for example, different sizes of handles can be installed according to different hand sizes.

[0094] Furthermore, the handle can also be elastic, rotatable, or foldable. When not in use, the handle can be attached to the surface of the main housing. When in use, the gripping portion of the handle can be lifted a certain distance away from the housing surface. However, the end of the handle has a one-way locking structure, so the handle will not detach from the housing when lifted. The one-way locking structure can be a switch structure that can be unlocked by pressing in a specific direction, thereby detaching the handle from the housing for maintenance and replacement.

[0095] In addition, in the present invention, the housing includes the outer surface of the pet care machine body, and the housing may not be an integrated structure, but may be composed of multiple parts. In addition, the housing may also be an integrated structure.

[0096] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pet care machine, characterized in that, Comprising: A housing with an air duct inside, having at least one air duct inlet and at least one air duct outlet; An electric fan for agitating air and forming an air flow that flows in from at least one of the air duct inlets and flows out from at least one of the air duct outlets in the air duct; A combing member including at least one set of comb teeth; the comb teeth having a retracted state and an extended state; A movement area located outside the air duct, communicating at least one of the air duct outlets and at least one of the air duct inlets, and providing space for the conversion of the comb teeth between the extended state and the retracted state; Wherein, in the retracted state, the tips of the comb teeth are retracted into the movement area, close to the housing; in the extended state, the tips of the comb teeth extend outward relative to the movement area, away from the housing, for combing pet hair; At least a part of the air flow flowing out from at least one of the air duct outlets passes through the comb teeth in the retracted state and flows into at least one of the air duct inlets.

2. The pet care machine according to claim 1, characterized in that, Further comprising: A battery for supplying electrical energy to the electric fan; Wherein, the air outlet of the electric fan is closer to the tips in the extended state than the air inlet of the electric fan; The housing has a holding part for the user to hold, and at least a part of the electric fan or the battery is located inside the holding part.

3. The pet care machine according to claim 1, characterized in that, Further comprising: An auxiliary air inlet including at least one air inlet hole provided on the housing and communicating with the air duct.

4. The pet care machine according to claim 3, wherein: Among them, The auxiliary air inlet is provided between the air outlet of the electric fan and at least one of the air duct outlets.

5. The pet care machine according to claim 1, wherein, Further comprising: A power adjustment mechanism that adjusts the power of the electric fan to W1 when the comb teeth are in the extended state and adjusts the power of the electric fan to W2 when the comb teeth are in the retracted state, where W2 > W1.

6. The pet care machine according to claim 5, characterized in that, Further comprising: A drive mechanism for driving the combing member and the power adjustment mechanism to synchronize the state conversion of the comb teeth and the power adjustment of the electric fan.

7. The pet care machine according to claim 5, wherein: Among them, When the combing member undergoes a state conversion, it triggers the power adjustment mechanism to adjust the power.

8. The pet care machine according to claim 1, characterized in that, Further comprising: A dust collection mechanism provided in the air duct, located between the air inlet of the electric fan and the air duct inlet, for collecting the pet hair combed off; Wherein, the air duct has two layers, the electric fan is arranged in the upper layer, the air duct inlet is in the lower layer, and the dust collection mechanism extends from near the air inlet of the electric fan to near at least one of the air duct inlets.

9. The pet care machine according to claim 1, wherein: Among them, An air inlet filter is provided upstream of the electric fan, and a thin plate with small holes is provided upstream of the air inlet filter. The thin plate extends from near the air inlet filter along the air duct to near at least one of the air duct inlets; on the thin plate, a negative pressure transmission area with small holes is formed in both the direction perpendicular to the air duct and the direction non-perpendicular to the air duct.

10. A pet care machine, characterized in that, Comprising: A housing with an air duct inside, having at least one air duct inlet and at least one air duct outlet; An electric fan, which is used to agitate air and form an air flow that flows in from at least one air duct inlet and flows out from at least one air duct outlet in the air duct; A battery, which is used to supply electrical energy to the electric fan; A combing member, which includes at least one set of comb teeth; the tips of the comb teeth can extend outward relative to the housing and are used to comb pet hair; Wherein, the air outlet of the electric fan is closer to the tips of the teeth in the extended state than the air inlet of the electric fan; The housing has a holding part for the user to hold, and at least a part of the electric fan or the battery is located inside the holding part.

11. The pet care machine according to claim 3, wherein, It further includes: A movement area, which provides space for hair to enter at least one air duct inlet; Wherein, the movement area is located outside the air duct and communicates at least one air duct outlet and at least one air duct inlet.

12. The pet care machine according to claim 10, characterized in that, It further includes: An auxiliary air inlet, which includes at least one air inlet hole provided on the housing and communicating with the air duct.

13. The pet care machine according to claim 12, wherein: Among them, The auxiliary air inlet is provided between the air outlet of the electric fan and at least one air duct outlet.

14. The pet care machine according to claim 10, wherein, It further includes: A dust collection mechanism, which is arranged in the air duct, between the air inlet of the electric fan and the air duct inlet, and is used to collect the pet hair combed down; Wherein, the air duct has upper and lower layers, the electric fan is arranged in the upper layer, the air duct inlet is located in the lower layer, and the dust collection mechanism extends from near the air inlet of the electric fan to near at least one air duct inlet.

15. The pet care machine according to claim 10, wherein: Among them, An air inlet filter is provided upstream of the electric fan, and a thin plate with small holes is provided upstream of the air inlet filter. The thin plate extends from near the air inlet filter along the air duct to near at least one air duct inlet; on the thin plate, a negative pressure transfer area with small holes is formed in both the direction perpendicular to the air duct and the direction non-perpendicular to the air duct.

16. A pet care machine, characterized in that, It includes: An electric fan, which is used to agitate air to generate an air flow and negative pressure, and includes an electric fan air inlet and an electric fan air outlet; A battery, which is used to supply electrical energy to the electric fan; A switch, which is used to control the on-off of the circuit between the battery and the electric fan; A combing member, which is used to comb pet hair and at least includes a base and comb teeth; A driving mechanism, which is used to drive the combing member to make the combing member switch between an extended state and a retracted state; A dust collection mechanism, which is located upstream of the electric fan and is used to accommodate the hair of the pet; A movement area, which is close to the combing member and provides space for the combing member to switch between an extended state and a retracted state; An air duct, which is used to circulate the air flow generated by the electric fan and has an air duct inlet and an air duct outlet, Wherein, the distance from the electric fan air inlet to the combing member is greater than the distance from the electric fan air outlet to the combing member, In the extended state, the comb teeth extend outward relative to the main body of the pet care machine and are used to comb pet hair. At this time, the movement area is open. In the storage state, the comb teeth are close to the main body of the pet care machine, and the comb teeth point to the air duct inlet. At this time, a part of the movement area is blocked by the combing member.

17. The pet care machine according to claim 16, characterized in that: Among them, The air duct inlet is far away from the base in the combing component and close to the downstream of the movement area, and the air duct outlet is close to the base in the combing component and also close to the upstream of the movement area. At least a part of the airflow generated by the electric blower reaches the movement area through the air duct outlet. When the electric blower is started in the extended state, fresh air flows from the outside of the pet care machine through the exercise area into the air duct inlet, and then reaches the exercise area through the air duct outlet. When the electric blower is started in the storage state, the outside air enters the air duct inlet through the tips of the comb teeth, flows out of the air duct outlet through the air duct, and at least a part of the airflow flowing out of the air duct outlet passes along the combing member through the tips of the comb teeth and enters the air duct inlet to form a circulating airflow.

18. The pet care machine according to claim 16, characterized in that: Among them, The driving mechanism is in contact with the base, and a spring is provided between the two. In the extended state, the scraper is sleeved on the periphery of the base. The combing member further comprises a swinging member, wherein the swinging member has two swinging arms, one end of each of the two swinging arms is rotatably mounted on the main body of the care machine, and the other end is connected to the scraper. The comb teeth are arranged on the base. When the driving mechanism pushes the base to rotate, the swinging member rotates along with the base, driving the scraper to move over the roots of the comb teeth toward the tips of the comb teeth, and the combing member is converted from an extended state to a retracted state.

19. The pet care machine according to claim 16, characterized in that: Among them, An air inlet filter is provided upstream of the electric fan, and a thin plate with small holes is provided upstream of the air inlet filter. At least a portion of the periphery of the thin plate is sealed and connected to the inner wall of the air duct, and a gap is left between the leeward side of the perforated area of the thin plate and the inner wall of the air duct. The negative pressure generated by the electric fan can reach the leeward side of the thin plate, and then reach the windward side of the thin plate through the small holes, so that the air in the inhaled airflow can flow to the air inlet filter through the small holes on the thin plate, and the floating hair entrained in the airflow can be intercepted by the small holes on the thin plate.

20. The pet care machine according to claim 19, characterized in that: Among them, The thin plate extends from near the air inlet filter along the air duct to near the air duct inlet; The thin plate is provided with the perforated area in both a direction perpendicular to the air duct and a direction not perpendicular to the air duct.

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