Handheld dust collector

Abstract

The utility model relates to the technical field of dust collectors, and particularly discloses a handheld dust collector which comprises a self-cleaning mechanism and a dust collection mechanism. The air flow forwards passes through the filter in the normal working state, and at least part of the air flow reversely impacts the filter in the self-cleaning state; a motor; the handheld dust collector further comprises an air duct shell, the air duct shell is located between the filter and the motor, and in the self-cleaning state, a self-cleaning air duct is formed in the air duct shell so as to guide airflow to at least partially impact the filter in the reverse direction; and at least one part of the self-cleaning mechanism is exposed out of the air duct shell, so that a user can switch the handheld dust collector from a normal working state to a self-cleaning state. At least one part of the self-cleaning mechanism is exposed out of the air duct shell, a visual and easy-to-operate switching mode is provided for a user, when the self-cleaning mechanism is operated by the user, the handheld dust collector can be switched from a normal working state to a self-cleaning state, and the overall cleaning efficiency and effect are improved.

Description

[0001] The present application claims priority to the Chinese patent application No. 202510034261.3, filed on January 9, 2025, and entitled "Cleaning device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of dust collectors, and in particular, to a handheld dust collector. BACKGROUND

[0003] In the technical field of handheld dust collectors, due to its high efficiency, convenient use and other advantages, it is widely used in household, industrial and other scenes.

[0004] The existing handheld dust collector usually includes a shell, a motor, a dust cup, a filter, a battery pack or a power cord, etc. A handle for a user to hold is formed on the shell. The motor is arranged in the shell to generate negative pressure. The filter is arranged in the dust cup to filter dust and impurities through the filter, and the corresponding dust and impurities are collected in the dust cup.

[0005] It can be understood that the filter of the handheld dust collector is easily clogged by dust and impurities after long-term use, which leads to a decrease in filtering effect, poor airflow, and thus affects the performance and cleaning efficiency of the entire dust collector. In order to solve this problem, the user usually needs to regularly disassemble and clean the filter, but this process is often cumbersome and inconvenient, increasing the user's maintenance cost and operation burden. Moreover, if not properly cleaned, the filter may be damaged, affecting its service life and filtering performance.

[0006] Based on this, the present application provides a handheld dust collector to improve the prior art. CONTENT OF THE INVENTION

[0007] The purpose of the present application is to provide a handheld dust collector to improve the cleaning efficiency of the filter of the handheld dust collector.

[0008] To achieve the above-mentioned purpose, the present application provides a handheld dust collector, comprising:

[0009] A self-cleaning mechanism is used to switch the handheld dust collector from a normal working state to a self-cleaning state when operated by a user.

[0010] A filter, in the normal working state, the airflow passes through the filter in the forward direction, and in the self-cleaning state, the airflow at least partially impacts the filter in the reverse direction.

[0011] A motor is used to generate negative pressure to form the airflow.

[0012] The handheld dust collector further comprises:

[0013] a wind channel housing located between the filter and the motor, in the normal working state, a dust filtering wind channel is formed in the wind channel housing to guide the airflow to pass through the filter in a forward direction, in the self-cleaning state, a self-cleaning wind channel is formed in the wind channel housing to guide the airflow to at least partially impact the filter in a reverse direction;

[0014] at least a part of the self-cleaning mechanism is exposed to the wind channel housing to provide the user with an operation of switching the handheld vacuum cleaner from the normal working state to the self-cleaning state.

[0015] At least a part of the self-cleaning mechanism is exposed to the wind channel housing to provide the user with an operation of switching the handheld vacuum cleaner from the normal working state to the self-cleaning state.

[0016] As a further improvement of the present application, the handheld vacuum cleaner further comprises a dust cup for collecting dirt;

[0017] The wind channel housing, the filter and the dust cup are arranged in sequence in the direction of the first axis, and the projections of the wind channel housing, the filter and the dust cup in the direction of the first axis each at least partially cover the projection of the self-cleaning mechanism in the direction of the first axis.

[0018] The wind channel housing, the filter and the dust cup are arranged in sequence in the direction of the first axis, which makes the overall structure of the handheld vacuum cleaner more compact. Meanwhile, the projections of the dust cup, the wind channel housing and the filter in the direction of the first axis each at least partially cover the projection of the self-cleaning mechanism in the direction, which makes the self-cleaning mechanism better integrated into the overall structure of the handheld vacuum cleaner, also means that the self-cleaning mechanism is relatively close to the dust cup, the wind channel housing and the filter, only needs to design the operation of the self-cleaning mechanism around the general direction of the first axis to trigger the self-cleaning function, which reduces the complexity of the user when operating the self-cleaning mechanism.

[0019] As a further improvement of the present application, the self-cleaning mechanism comprises:

[0020] a valve assembly arranged in the wind channel housing, by operating the opening or closing of the valve assembly, the switching between the normal working state and the self-cleaning state is realized;

[0021] an operating member, at least a part of the operating member is exposed to the wind channel housing to provide the user with an operation of opening or closing the valve assembly;

[0022] The dust cup has an opening through which dirt is discharged from the dust cup;

[0023] The operation member and the opening are respectively located at two ends of the handheld dust collector in the direction of the first axis.

[0024] The valve assembly is arranged in the air duct housing, and the switching between the normal working state and the self-cleaning state can be realized by operating the opening or closing of the valve assembly, so that the user can easily switch the handheld dust collector between the two states. At least a part of the operation member is exposed to the air duct housing, providing an intuitive operation site for the user. The user can open or close the valve assembly by simple pressing or pulling actions, which is simple and intuitive, and reduces the operation difficulty. Meanwhile, the operation member and the opening are respectively located at two ends of the handheld dust collector in the direction of the first axis, which makes the overall structure of the handheld dust collector more reasonable and further limits the setting position of the operation member.

[0025] As a further improvement of the utility model, the air duct housing is further provided with a self-cleaning opening and a gas supplementing port;

[0026] The valve assembly comprises a self-cleaning valve and a gas supplementing valve, which are respectively arranged at the positions of the self-cleaning opening and the gas supplementing port, and are respectively used to open or close the self-cleaning opening and the gas supplementing port;

[0027] In the normal working state, the self-cleaning opening and the gas supplementing port are closed;

[0028] In the self-cleaning state, the self-cleaning opening and the gas supplementing port are opened to form a self-cleaning air duct that sequentially flows through the gas supplementing port, the motor, the self-cleaning opening and the filter.

[0029] By arranging the self-cleaning opening and the gas supplementing port and equipping corresponding self-cleaning valve and gas supplementing valve, the handheld dust collector can form a special self-cleaning air duct in the self-cleaning state, so that the airflow can sequentially flow through the gas supplementing port, the motor, the self-cleaning opening and the filter, effectively impact the filter in the reverse direction, remove dust and impurities on the filter, thereby restoring the performance of the filter and improving the efficiency and effect of self-cleaning. In the normal working state, the self-cleaning opening and the gas supplementing port are closed to ensure that the airflow is completely used for dust collection, improving the dust collection efficiency.

[0030] As a further improvement of the utility model, the air duct housing is further provided with a filter outlet, which is located in the dust filtering air duct;

[0031] The valve assembly further comprises a filter valve arranged at the position of the filter outlet to open or close the filter outlet;

[0032] In the normal working state, the filter outlet is opened to connect the dust filtering air duct;

[0033] In the self-cleaning state, the filter outlet is closed to cut off the dust filtering air duct.

[0034] In the normal working state, the filter outlet is opened, the dust filtering air duct is connected, and the air flow can smoothly pass through the filter, effectively collecting dust and impurities, improving the dust collection efficiency and cleaning effect. In the self-cleaning state, the filter outlet is closed, the dust filtering air duct is cut off, and the air flow can only flow through the self-cleaning air duct, impacting the filter in the opposite direction, thereby more effectively removing dust and blockages on the filter, restoring the performance of the filter. The filter valve can flexibly control the air flow path according to different working states, ensuring optimal air flow utilization in both dust collection (normal working state) and self-cleaning modes, improving overall performance. The filter outlet and filter valve are integrated in the air duct housing, without occupying additional space, making the internal structure of the handheld vacuum cleaner more compact.

[0035] As a further improvement of the present application, the outer housing is arranged on the outer side of the motor and the air duct housing, and at least a part of the operating member is exposed to the outer housing to provide the user with an operating part for opening or closing the valve assembly.

[0036] The outer housing is arranged on the outer side of the motor and the air duct housing, which can effectively protect the internal motor, air duct housing and other sensitive components from dust, debris and moisture from the outside, while the wrapping of the outer housing can enhance the overall structural stability of the handheld vacuum cleaner, reducing the risk of internal component loosening or damage caused by collision or vibration during use, ensuring stable operation of the product in various environments, improving the durability and reliability of the product. At least a part of the operating member is exposed to the outer housing, providing the user with an easily accessible operating part, and the user can easily open or close the valve assembly through this exposed part to switch between the normal working state and the self-cleaning state,

[0037] As a further improvement of the present application, the outer housing is provided with an exhaust port, and the exhaust port is in communication with the air supplement port;

[0038] In the normal working state, the air flow in the dust filtering air duct is discharged to the outside air through the exhaust port;

[0039] In the self-cleaning state, the outside air enters from the exhaust port, passes through the air supplement port and enters the air duct housing to form the self-cleaning air duct.

[0040] The exhaust port is the final outlet of the air flow in the dust filtering air duct, but after the exhaust port on the outer shell is communicated with the air supplement port on the air duct shell, the exhaust port can be used as the first end opening of the self-cleaning air duct, the entering air enters the air duct shell through the air supplement port, then sequentially flows through the motor, the self-cleaning opening and the like, and finally impacts the filter, so that the self-cleaning air duct is formed. The additional opening and component requirement are reduced, and the outer shell design of the handheld dust collector is more simple and compact.

[0041] As a further improvement of the utility model, the air duct shell is further provided with a self-cleaning opening, an air supplement port and a filtering outlet, the filtering outlet is located in the dust filtering air duct, the valve assembly further comprises a filtering valve,

[0042] The filtering outlet is arranged adjacent to the self-cleaning opening, and the filtering valve is arranged between the filtering outlet and the self-cleaning opening, so as to close one of the filtering outlet and the self-cleaning opening and open the other one.

[0043] Alternatively, the filtering outlet is arranged adjacent to the air supplement port, and the filtering valve is arranged between the filtering outlet and the air supplement port, so as to close one of the filtering outlet and the air supplement port and open the other one.

[0044] The opening and closing of two openings are simultaneously controlled by one valve (filtering valve), the number and complexity of valves are reduced, and the production cost and potential failure points are reduced. The adjacent arrangement of the openings and the integrated filtering valve make the internal structure more compact, optimize the internal space utilization of the product, and make the overall design more simple.

[0045] As a further improvement of the utility model, the self-cleaning mechanism further comprises:

[0046] A reset spring is arranged on at least one of the valve assembly and the operating member, so as to make the valve assembly and the operating member move towards the normal working state.

[0047] The arrangement of the reset spring makes the valve assembly and the operating member automatically move towards the normal working state after the self-cleaning operation (or the user releases the operation) is completed, so that the automatic reset function ensures that the handheld dust collector can quickly return to the normal working state without manual adjustment of the user after the self-cleaning is completed, and the operation convenience is improved.

[0048] As a further improvement of the utility model, the operating member and the valve assembly are arranged in the direction of the first axis, and the projection of the operating member and the valve assembly in the direction of the first axis at least partially overlaps.

[0049] The operation member and the valve assembly are arranged along the first axis, and projections thereof at least partially coincide, so that the structure of the operation member and the valve assembly is compact and saves space. Meanwhile, the arrangement along the first axis makes the force transmission between the operation member and the valve assembly more direct and efficient, and the operation efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 An overall side view of a cleaning device according to an embodiment of the present application is provided.

[0051] Figure 2 An overall structure schematic view of a cleaning device according to an embodiment of the present application is provided.

[0052] Figure 3 An explosion schematic view of a cleaning device according to an embodiment of the present application is provided.

[0053] Figure 4 A longitudinal section structure schematic view of a cleaning device according to an embodiment of the present application in a normal working state is provided.

[0054] Figure 5 A longitudinal section structure schematic view of a cleaning device according to an embodiment of the present application in a self-cleaning state is provided.

[0055] Figure 6 A transverse section structure schematic view of a wind channel shell according to an embodiment of the present application is provided.

[0056] Figure 7 An explosion schematic view of a wind channel shell according to an embodiment of the present application is provided.

[0057] In the drawings: 110, self-cleaning mechanism; 120, filter; 130, motor; 140, wind channel shell; 150, dust cup; 160, outer shell; 1111, air supplement valve; 1112, self-cleaning valve; 1113, sealing member; 112, operation member; 113, reset spring; 131, motor inlet end; 132, motor outlet end; 141, dust filtering wind channel; 142, self-cleaning wind channel; 145, self-cleaning opening; 146, air supplement opening; 1413, third chamber; 1414, fourth chamber; 1415, fifth chamber; 1416, air outlet; 1417, filtering outlet; 1418, shell main body; 1419, shell upper cover; 1420, second partition wall; 1421, third partition wall; 161, air outlet; 190, battery pack. DETAILED DESCRIPTION

[0058] The embodiments shown in the drawings will be described in detail below. However, the embodiments do not limit the present application, and the changes in the structure, method, or function made by those skilled in the art based on the embodiments are included in the protection scope of the present application. DETAILED DESCRIPTION

[0059] The terms such as "upper", "lower", "left", "right", "front", "back", etc. used herein to indicate spatial relative positions are for the purpose of facilitating the description of the relationship of one feature relative to another feature as shown in the drawings. It can be understood that the terms of spatial relative positions can be intended to include different orientations in addition to the orientations shown in the drawings, and should not be construed as limiting the claims. In addition, the descriptive word "horizontal" used herein is not completely equivalent to along the direction perpendicular to the direction of gravity, and a certain angle of inclination is allowed.

[0060] Self-cleaning of the dust collector refers to that the dust collector can automatically clean the filter inside it during operation, reducing the need for manual cleaning.

[0061] Currently, the self-cleaning of the dust collector is mainly applied to the barrel type dust collector. The main reason is the limitation of design space. The barrel type dust collector itself has a larger space (volume), and the volume of its head assembly is also larger, so it can better set up a self-cleaning air duct.

[0062] As for the handheld dust collector, due to its handheld characteristics, there are limitations on volume and mass, so there is no mature self-cleaning solution for handheld dust collectors on the market at present.

[0063] The present application improves the structure of the handheld dust collector to solve the technical problem of inconvenient filter cleaning and improve the cleaning efficiency of the filter of the handheld dust collector.

[0064] Referring to Figures 1 to 7 , the utility model provides a handheld dust collector, which comprises:

[0065] A self-cleaning mechanism 110 is used to switch the handheld dust collector from a normal working state to a self-cleaning state when operated by a user.

[0066] A filter 120 is used to allow airflow to pass through the filter 120 in the normal working state, and to allow airflow to at least partially impact the filter 120 in the self-cleaning state.

[0067] A motor 130 is used to generate negative pressure to form the airflow.

[0068] The handheld dust collector further comprises:

[0069] A duct housing 140 is located between the filter 120 and the motor 130. In the normal working state, a dust filtering duct 141 is formed in the duct housing 140 to guide the airflow to pass through the filter 120 in a forward direction. In the self-cleaning state, a self-cleaning duct 142 is formed in the duct housing 140 to guide the airflow to at least partially impact the filter 120 in a reverse direction.

[0070] At least a part of the self-cleaning mechanism 110 is exposed outside the duct housing 140 to provide a user with an operation to switch the handheld vacuum cleaner from the normal working state to the self-cleaning state.

[0071] In the normal working state, a dust filtering duct 141 is formed in the duct housing 140 to guide the airflow to pass through the filter 120 in a forward direction. In the self-cleaning state, a self-cleaning duct 142 is formed in the duct housing 140 to guide the airflow to at least partially impact the filter 120 in a reverse direction to achieve the cleaning function.

[0072] The self-cleaning mechanism 110 allows a user to switch the vacuum cleaner from the normal working state to the self-cleaning state through a simple operation. In the normal working state, the vacuum cleaner is mainly used to suck in dust and impurities. In the self-cleaning state, the airflow direction inside the vacuum cleaner changes to achieve automatic cleaning of the filter 120 and other internal components.

[0073] Specifically, referring to Figure 4 and Figure 5 In the normal working state, the airflow passes through the filter 120 in a forward direction, i.e., the airflow enters from one side of the filter 120, passes through the filter 120 to filter out dust and impurities, and then exits from the other side. In the self-cleaning state, the airflow direction is changed so that the airflow at least partially reverses from the exit side to the entry side of the filter 120. This reverse airflow can help loosen and remove dust and impurities attached to the entry side of the filter 120.

[0074] A part of the self-cleaning mechanism 110 is exposed, i.e., at least partially protruding or located outside the duct housing 140, which can be directly seen and touched by a user. The user can manually operate this exposed part to control the self-cleaning state of the cleaning device, and activate or deactivate the self-cleaning function through a simple physical operation such as pressing, rotating, or sliding.

[0075] In this embodiment, the handheld vacuum cleaner further includes a dust cup 150 for collecting dirt.

[0076] The air duct housing 140, the filter 120 and the dust cup 150 are arranged in sequence in the direction of the first axis, and the projections of the air duct housing 140, the filter 120 and the dust cup 150 in the direction of the first axis each at least partially cover the projection of the self-cleaning mechanism 110 in the direction of the first axis.

[0077] Generally, the filter 120 is located in the dust cup 150, and the dust cup 150 is used to collect dust, sundries and other impurities separated from the air flow by the filter 120.

[0078] The projections of the air duct housing 140, the filter 120 and the dust cup 150 in the direction of the first axis each at least partially cover the projection of the self-cleaning mechanism 110 in the direction of the first axis means that when the projections are made in the direction of the first axis (i.e. when the profile ranges of the three components in the direction are observed from the angle of the first axis direction), the projection ranges of the air duct housing 140, the filter 120 and the dust cup 150 will overlap with the projection range of the self-cleaning mechanism 110 to some extent. This is to reasonably arrange the components in the limited space of the handheld vacuum cleaner, realize the self-cleaning function, and at the same time not occupy too much additional space, maintain the compactness and portability of the handheld vacuum cleaner. The first axis direction can be the direction of the air flow passing through the filter 120, or the installation direction of the filter 120, which is not limited here.

[0079] The air duct housing 140, the filter 120 and the dust cup 150 are arranged in sequence in the direction of the first axis, so that the overall structure of the handheld vacuum cleaner is more compact. At the same time, the projections of the dust cup 150, the air duct housing 140 and the filter 120 in the direction of the first axis each at least partially cover the projection of the self-cleaning mechanism 110 in the direction, so that the self-cleaning mechanism 110 can be better integrated into the overall structure of the handheld vacuum cleaner, which also means that the self-cleaning mechanism 110 is relatively close to the positions of the dust cup 150, the air duct housing 140 and the filter 120. Only the trigger structure of the self-cleaning mechanism 110 needs to be arranged around the general direction of the first axis to trigger the self-cleaning function, reducing the complexity of the user in operating the self-cleaning mechanism 110.

[0080] Further, the self-cleaning mechanism 110 comprises:

[0081] A valve assembly arranged in the air duct housing 140, and the switching between the normal working state and the self-cleaning state is realized by operating the opening or closing of the valve assembly;

[0082] An operating member 112, at least a part of the operating member 112 is exposed to the air duct housing 140 to provide the user with the operation of opening or closing the valve assembly;

[0083] The dust cup 150 has an opening through which dirt is discharged from the dust cup 150;

[0084] The operation member 112 and the opening of the dust cup 150 are respectively located at two ends of the handheld vacuum cleaner in the direction of the first axis.

[0085] The valve assembly is composed of multiple valve members and is installed inside the air duct housing 140. The arrangement and operation of the valve assembly essentially change the air flow path and pressure state inside the vacuum cleaner, thereby achieving switching between the normal working state and the self-cleaning state. In the normal working state, the negative pressure generated by the motor 130 helps to suck air through the filter 120 in the forward direction, while in the self-cleaning state, the movement of the valve assembly changes the flow direction of the air flow or changes the pressure distribution to generate sufficient air flow to impact the filter 120 in the reverse direction, thereby achieving self-cleaning.

[0086] The operation member 112 is a component for user interaction with the self-cleaning mechanism 110, i.e., a component for user operation of the self-cleaning mechanism 110, at least a part of which protrudes from the surface of the air duct housing 140 to facilitate direct user operation. The operation member 112 is directly or indirectly connected to the valve assembly to drive the valve members to move.

[0087] The operation member 112 and the opening of the dust cup 150 are respectively located at two ends of the handheld vacuum cleaner in the direction of the first axis, i.e., one end is used to control the switching of the self-cleaning state, and the other end is used to clean the collected dirt. This structural arrangement is more conducive to the convenience of self-cleaning operation, and after self-cleaning is completed, the dust from self-cleaning can be poured out through the opening.

[0088] That is, the valve assembly is arranged inside the air duct housing 140, and by opening or closing the valve assembly, the switching between the normal working state and the self-cleaning state can be achieved, so that the user can easily operate the vacuum cleaner to switch between the two states. At least a part of the operation member 112 is exposed to the air duct housing 140, providing an intuitive operation site for the user. The user can open or close the valve assembly by simple pressing or pulling actions, which is simple and intuitive and reduces the difficulty of operation. At the same time, the operation member 112 and the opening of the dust cup 150 are respectively located at two ends of the handheld vacuum cleaner in the direction of the first axis, which makes the overall structure of the handheld vacuum cleaner more reasonable and further limits the setting position of the operation member 112.

[0089] Further, the operation member 112 and the valve assembly are arranged in the direction of the first axis; and the projection of the operation member 112 and the valve assembly in the direction of the first axis at least partially overlaps.

[0090] The operation member 112 and the valve assembly are arranged in sequence in the first axis direction, that is, the two have a positional relationship in the front-rear direction. The at least partial overlap of the projection of the operation member 112 and the valve assembly in the first axis direction means that when projected from the first axis direction, the projection range of the operation member 112 and the projection range of the valve assembly overlap in part in the plane, thereby limiting the spatial positional relationship between the two and further making the structure more compact and saving space. At the same time, arranging along the first axis makes the force transmission between the operation member 112 and the valve assembly more direct and efficient, which can improve the operation efficiency.

[0091] Referring to Figures 4 to 7 In the present embodiment, the air duct housing 140 is further provided with a self-cleaning opening 145 and a supplementary air inlet 146;

[0092] The valve assembly includes a self-cleaning valve 1112 and a supplementary air valve 1111, which are respectively arranged at the positions of the self-cleaning opening 145 and the supplementary air inlet 146, and are respectively used to open or close the self-cleaning opening 145 and the supplementary air inlet 146;

[0093] In the normal working state, the self-cleaning opening 145 and the supplementary air inlet 146 are closed;

[0094] In the self-cleaning state, the self-cleaning opening 145 and the supplementary air inlet 146 are opened to form a self-cleaning air duct 142 that flows through the supplementary air inlet 146, the motor 130, the self-cleaning opening 145, and the filter 120 in sequence.

[0095] The air duct housing 140 is provided with a self-cleaning opening 145 and a supplementary air inlet 146, and the positions and designs of the self-cleaning opening 145 and the supplementary air inlet 146 need to be matched with the internal valve assembly to ensure that the airflow can flow along the predetermined path in different working states. Correspondingly, the valve assembly includes a self-cleaning valve 1112 and a supplementary air valve 1111, which are respectively installed at the positions of the self-cleaning opening 145 and the supplementary air inlet 146.

[0096] By providing the self-cleaning opening 145 and the supplementary air inlet 146 and equipping the corresponding self-cleaning valve 1112 and the supplementary air valve 1111, the handheld vacuum cleaner can form a special self-cleaning air duct 142 in the self-cleaning state, so that the airflow can flow through the supplementary air inlet 146, the motor 130, the self-cleaning opening 145, and the filter 120 in sequence, effectively impacting the filter 120 in reverse, removing dust and impurities thereon, thereby restoring the performance of the filter 120 and improving the efficiency and effect of self-cleaning. In the normal working state, the self-cleaning opening 145 and the supplementary air inlet 146 are closed to ensure that the airflow is completely used for dust collection, thereby improving the dust collection efficiency.

[0097] Further, the air duct housing 140 is further provided with a filter outlet 1417 located in the dust filtering air duct 141;

[0098] The valve assembly further comprises a filter valve arranged at the position of the filter outlet 1417 to open or close the filter outlet 1417;

[0099] In the normal working state, the filter outlet 1417 is open to connect the dust filtering air duct 141;

[0100] In the self-cleaning state, the filter outlet 1417 is closed to cut off the dust filtering air duct 141.

[0101] The dust filtering air duct 141 refers to the path of the airflow passing through the filter 120 in the normal working state. The filter outlet 1417 is located in the dust filtering air duct 141, and its function is to allow the filtered airflow to flow to the motor 130 in the normal working state.

[0102] In the normal working state, the filter outlet 1417 is open, and the dust filtering air duct 141 is connected, ensuring that the airflow can smoothly pass through the filter 120, effectively collecting dust and impurities, and improving the dust collection efficiency and cleaning effect. In the self-cleaning state, the filter outlet 1417 is closed, cutting off the dust filtering air duct 141, so that the airflow can only flow through the self-cleaning air duct 142, impacting the filter 120 in the reverse direction, thereby more effectively removing dust and blockages on the filter 120, restoring the performance of the filter 120. The arrangement of the filter valve can flexibly control the airflow path according to different working states, ensuring that the best airflow utilization effect can be achieved in both normal working (dust collection state) and self-cleaning modes, improving the overall performance. At the same time, the filter outlet 1417 and the filter valve are integrated in the air duct housing 140, without occupying additional space, making the internal structure of the handheld vacuum cleaner more compact.

[0103] In some embodiments, referring to Figure 4 and Figure 5 , the adjacent openings can share a valve piece to reduce space occupation.

[0104] Specifically, the air duct housing 140 is further provided with a self-cleaning opening 145, a supplementary air inlet 146, and a filter outlet 1417 located in the dust filtering air duct 141; the valve assembly further comprises a filter valve;

[0105] The filter outlet 1417 is arranged adjacent to the self-cleaning opening 145, and the filter valve is arranged between the filter outlet 1417 and the self-cleaning opening 145 to close one of the filter outlet 1417 and the self-cleaning opening 145 and open the other.

[0106] Or, the filter outlet 1417 is arranged adjacent to the air supplement port 146, and the filter valve is arranged between the filter outlet 1417 and the air supplement port 146 to close one of the filter outlet 1417 and the air supplement port 146 and open the other.

[0107] That is, when the filter valve controls the self-cleaning opening 145 at the same time, the filter valve is the same valve as the self-cleaning valve 1112 described above; when the filter valve controls the air supplement port 146 at the same time, the filter valve is the same valve as the air supplement valve 1111 described above. By controlling the opening and closing of two openings at the same time through one valve (filter valve / air supplement valve / self-cleaning valve), the number and complexity of valves are reduced, the production cost and potential failure points are reduced. The adjacent arrangement of the openings and the integrated filter valve make the internal structure more compact, optimize the internal space utilization of the product, and make the overall design more simple.

[0108] In the embodiment, referring to Figure 2 , the outer shell 160 is arranged outside the motor 130 and the air duct shell 140, and at least a part of the operation member 112 is exposed to the outer shell 160 to provide the user with an operation for opening or closing the valve assembly.

[0109] The outer shell 160 arranged outside the motor 130 and the air duct shell 140 means that the outer shell 160 at least partially wraps and covers the motor 130 and the air duct shell 140 to form the external main body structure of the handheld vacuum cleaner.

[0110] The outer shell 160 arranged outside the motor 130 and the air duct shell 140 can effectively protect the internal motor 130, air duct shell 140, and other sensitive components, prevent dust, debris, and moisture from the outside from entering, and at the same time, the wrapping of the outer shell 160 can enhance the overall structural stability of the handheld vacuum cleaner, reduce the risk of internal components loosening or damage caused by collision or vibration during use, ensure stable operation of the product in various environments, and improve the durability and reliability of the product. At least a part of the operation member 112 is exposed to the outer shell 160 to provide the user with an easily accessible operation part, and the user can easily open or close the valve assembly through this exposed part to realize the switching between the normal working state and the self-cleaning state,

[0111] Continuing to refer to Figure 2 , the outer shell 160 is provided with an exhaust port 161, and the exhaust port 161 communicates with the air supplement port 146;

[0112] In the normal working state, the airflow in the dust filtering air duct 141 is discharged to the outside air through the exhaust port 161;

[0113] In the self-cleaning state, the outside air enters from the exhaust port 161, enters into the air duct housing 140 through the air supplement port 146, to form the self-cleaning air duct 142.

[0114] The exhaust port 161 is an opening on the outer housing 160, which can be one or more, arranged regularly, and the shape and number of the exhaust port 161 are not limited here.

[0115] The exhaust port 161 and the air supplement port 146 are connected through the internal air duct design, so that the air can flow between them. The exhaust port 161 itself is the final outlet of the dust filtering air duct 141, but after connecting the exhaust port 161 on the outer housing 160 with the air supplement port 146 on the air duct housing 140, the exhaust port 161 can be used as the first opening of the self-cleaning air duct 142. The entering air enters the air duct housing 140 through the air supplement port 146, then flows through the motor 130, the self-cleaning opening 145, etc. in turn, and finally impacts the filter 120, forming the self-cleaning air duct 142. By reducing the additional opening and component requirements, the design of the outer housing 160 of the handheld vacuum cleaner is more simple and compact.

[0116] In the embodiment, the self-cleaning mechanism 110 further comprises a reset spring 113 arranged on at least one of the valve assembly and the operating member 112, to make the valve assembly and the operating member 112 move towards the trend of restoring the normal working state.

[0117] The arrangement of the reset spring 113 enables the valve assembly and the operating member 112 to automatically move towards the trend of restoring the normal working state after completing the self-cleaning operation (or the user releasing the operation), so that the automatic reset function ensures that the handheld vacuum cleaner can quickly return to the normal working state without manual adjustment after the self-cleaning is completed, improving the convenience of operation.

[0118] Referring to Figures 4-7 The embodiment also provides a specific structure of the air duct housing 140. Specifically, the air duct housing 140 is provided with multiple partition walls to divide the space of the air duct housing 140 into multiple chambers; the multiple chambers at least include:

[0119] The third chamber 1413 is in communication with the dust cup 150;

[0120] The fourth chamber 1414 is in communication with the motor inlet end 131, and the fourth chamber 1414 and the third chamber 1413 are in communication through the filter outlet 1417 formed on the partition wall, and the fourth chamber 1414 is further provided with the air supplement port 146 in communication with the outside air;

[0121] The fifth chamber 1415 is in communication with the motor outlet end 132, and the fifth chamber 1415 is provided with an air outlet 1416 in communication with the outside air; the fifth chamber 1415 and the third chamber 1413 are in communication through the self-cleaning opening 145 formed on the partition wall;

[0122] At least part of the self-cleaning mechanism 110 is arranged in the air duct shell 140 to open or close the self-cleaning opening 145, the air supplementing opening 146, the filter outlet 1417 and the air outlet 1416;

[0123] In the normal working state, the filter outlet 1417 and the air outlet 1416 are in an open state, the self-cleaning opening 145 and the air supplementing opening 146 are in a closed state, and the airflow flows through the dust cup 150, the third chamber 1413, the filter outlet 1417, the fourth chamber 1414, the motor 130, the fifth chamber 1415 and the air outlet 1416 in sequence to form the dust filtering air duct 141.

[0124] In the self-cleaning state, the filter outlet 1417 and the air outlet 1416 are in a closed state, the self-cleaning opening 145 and the air supplementing opening 146 are in an open state, and the airflow flows through the air supplementing opening 146, the fourth chamber 1414, the motor 130, the fifth chamber 1415, the self-cleaning opening 145, the third chamber 1413 and the filter 120 in sequence to form the self-cleaning air duct 142.

[0125] Inside the air duct shell 140, a plurality of partition walls are arranged to divide the originally single space into a plurality of independent chambers, and these chambers have different functions in different working states of the cleaning device.

[0126] The third chamber 1413 is located at the top of the dust cup 150 and the filter 120, corresponding to the outlet of the dust cup 150. In the normal working state, the airflow can enter the third chamber 1413 from the dust cup 150 and continue to flow along the predetermined path.

[0127] The fourth chamber 1414 is in communication with the motor inlet end 131, and is in communication with the third chamber 1413 through the filter outlet 1417 on the partition wall, so that the airflow can enter the fourth chamber 1414 from the third chamber 1413 through the filter outlet 1417.

[0128] The fifth chamber 1415 is another chamber separated by the separation wall, which is in communication with the motor outlet end 132 for discharging the gas discharged by the motor 130. That is, the air duct housing 140 or the cleaning device has a passage communicating the fifth chamber 1415 and the motor outlet end 132. In some embodiments, the passage is formed on the air duct housing 140 and is arranged substantially in parallel with the connecting passage of the fourth chamber 1414 and the motor inlet end 131, or is arranged around, so as to save the space of the air duct housing 140.

[0129] The fifth chamber 1415 is provided with an air outlet 1416. The self-cleaning mechanism 110 keeps the valves of the filter outlet 1417 and the air outlet 1416 in the open position, while keeping the valves of the self-cleaning opening 145 and the air supplementing opening 146 in the closed position. The air flow generated by the negative pressure of the motor 130 passes through the chambers and openings in turn, and the air carrying dust is collected in the dust cup 150. The clean air filtered by the filter 120 is finally discharged through the air outlet 1416.

[0130] The fourth chamber 1414 is also provided with an air supplementing opening 146. In the self-cleaning state, the self-cleaning mechanism 110 closes the valves of the filter outlet 1417 and the air outlet 1416, while opening the valves of the self-cleaning opening 145 and the air supplementing opening 146. The air flow driven by the negative pressure of the motor 130 enters through the air supplementing opening 146, passes through the fourth chamber 1414 and the motor 130, enters the third chamber 1413 through the self-cleaning opening 145 from the fifth chamber 1415, and finally impacts the filter 120 in reverse, so as to remove the dust and impurities on the surface of the filter 120 by using the reverse air flow.

[0131] Therefore, the multiple separation walls reasonably separate the space of the air duct housing 140, so that the air flow has a clear and optimized flow path in different working states. The self-cleaning mechanism 110 is arranged in the air duct housing 140 and accurately switches between the two working states by precisely opening or closing the corresponding openings. Not only does this make the structure of the entire device compact and the layout reasonable, but also improves the reliability of self-cleaning and ensures that the cleaning device can operate efficiently in different modes.

[0132] In actual use, the user holds the holding part of the outer housing, starts the motor, and the cleaning device (handheld vacuum cleaner) is in the normal working state by default. At this time, the valves of the self-cleaning mechanism are closed, and the air flow passes through the dust cup, the filter, and the motor and is then discharged. When self-cleaning is needed, the user operates the operating part of the self-cleaning mechanism to open the corresponding valves, and the air flow path is switched to the self-cleaning air duct. External air enters from the air outlet, passes through the air supplementing opening, the motor, and the self-cleaning opening to impact the filter in reverse. After cleaning, the operating part is released, and the return spring makes the valves return to the normal working state.

[0133] It should be understood that although the present specification is described in terms of embodiments, not every embodiment exhibits only one independent technical solution, and the present specification is described in this manner only for the sake of clarity, and those skilled in the art should consider the present specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0134] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A hand-held vacuum cleaner, comprising: a housing body formed with a grip portion for a user to hold; a self-cleaning mechanism for switching the hand-held vacuum cleaner from a normal working state to a self-cleaning state when operated by the user; a filter through which air flow passes in a forward direction in the normal working state and at least partially impacts in a reverse direction in the self-cleaning state; a motor for generating negative pressure to form the air flow; characterized in that the hand-held vacuum cleaner further comprises: an air duct housing located between the filter and the motor, in which a dust filtering air duct is formed to guide the air flow to pass through the filter in the forward direction in the normal working state, and a self-cleaning air duct is formed to guide the air flow to at least partially impact the filter in the reverse direction in the self-cleaning state; at least a part of the self-cleaning mechanism is exposed to the air duct housing to provide the user with an operation of switching the hand-held vacuum cleaner from the normal working state to the self-cleaning state.

2. The hand vacuum cleaner of claim 1, wherein, The hand-held vacuum cleaner further comprises a dust cup for collecting dirt; the air duct housing, the filter and the dust cup are arranged in sequence in the direction of a first axis, and the projections of the air duct housing, the filter and the dust cup in the direction of the first axis each at least partially cover the projection of the self-cleaning mechanism in the direction of the first axis.

3. The hand vacuum cleaner of claim 2, wherein, The self-cleaning mechanism comprises: a valve assembly arranged in the air duct housing, and the switching between the normal working state and the self-cleaning state is realized by operating the opening or closing of the valve assembly; an operating member, at least a part of which is exposed to the air duct housing to provide the user with an operation of opening or closing the valve assembly; the dust cup has an opening through which dirt is discharged from the dust cup; the operating member and the opening are respectively located at two ends of the hand-held vacuum cleaner in the direction of the first axis.

4. The hand vacuum cleaner of claim 3, wherein, The air duct housing is further provided with a self-cleaning opening and a supplementary air inlet; the valve assembly comprises a self-cleaning valve and a supplementary air valve, which are respectively arranged at the positions of the self-cleaning opening and the supplementary air inlet to open or close the self-cleaning opening and the supplementary air inlet respectively; in the normal working state, the self-cleaning opening and the supplementary air inlet are closed; in the self-cleaning state, the self-cleaning opening and the supplementary air inlet are opened to form a self-cleaning air duct that sequentially flows through the supplementary air inlet, the motor, the self-cleaning opening and the filter.

5. The hand vacuum cleaner of claim 4, wherein, The air duct housing is further provided with a filter outlet located in the dust filtering air duct; the valve assembly further comprises a filter valve arranged at the position of the filter outlet to open or close the filter outlet; in the normal working state, the filter outlet is opened to open the dust filtering air duct; in the self-cleaning state, the filter outlet is closed to cut off the dust filtering air duct.

6. The hand vacuum cleaner of claim 4, wherein, the hand-held vacuum cleaner further comprises: The outer shell is arranged outside the motor and the air duct shell, at least a part of the operating member is exposed to the outer shell to provide a user to open or close the valve assembly.

7. The hand vacuum cleaner of claim 6, wherein, The outer shell is provided with an exhaust port, which is in communication with the air supplement port; In the normal working state, the airflow in the dust filtering air duct is discharged to the outside air through the exhaust port; In the self-cleaning state, the outside air enters from the exhaust port, enters into the air duct shell through the air supplement port to form the self-cleaning air duct.

8. The hand vacuum cleaner of claim 3, wherein, The air duct shell is further provided with a self-cleaning opening, an air supplement port and a filtering outlet, the filtering outlet is located in the dust filtering air duct; the valve assembly further comprises a filtering valve; The filtering outlet is arranged adjacent to the self-cleaning opening, the filtering valve is arranged between the filtering outlet and the self-cleaning opening to close one of the filtering outlet and the self-cleaning opening and open the other one; Or, the filtering outlet is arranged adjacent to the air supplement port, the filtering valve is arranged between the filtering outlet and the air supplement port to close one of the filtering outlet and the air supplement port and open the other one.

9. The hand vacuum cleaner of claim 3, wherein, The self-cleaning mechanism further comprises: A reset spring is arranged on at least one of the valve assembly and the operating member to make the valve assembly and the operating member move towards the normal working state.

10. The hand vacuum cleaner of claim 3, wherein, The operating member and the valve assembly are arranged along the direction of the first axis; and the projection of the operating member and the valve assembly in the direction of the first axis at least partially coincides.

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