Cleaning device

Abstract

The utility model relates to the technical field of dust collectors, and particularly discloses a cleaning device, which comprises a self-cleaning mechanism used for switching the cleaning device from a normal working state to a self-cleaning state when being operated by a user; a filter; a motor; a dust cup; the air duct shell is located between the filter and the motor, the air duct shell is provided with an air outlet and a self-cleaning opening, and a motor air inlet channel communicated with the dust cup and the inlet end of the motor and a motor air outlet channel communicated with the outlet end of the motor and the air outlet are formed in the air duct shell; the self-cleaning opening is located above the filter and arranged between the motor air inlet channel and the motor air outlet channel. In the self-cleaning state, airflow forms a circulation loop between the motor air inlet channel and the motor air outlet channel, it is ensured that the airflow can effectively impact the filter in the reverse direction, meanwhile, the overall airflow (air volume) is small, the speed and force of the airflow are relatively mild, the impact influence on dust in the dust cup is small, and the dust spraying phenomenon can be reduced.

Description

[0001] This 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 cleaning, in particular to a cleaning device. BACKGROUND

[0003] In the field of cleaning devices, especially devices like vacuum cleaners, conventional configurations have components such as filters, motors and dust cups. When normally operating, the motor operates to generate negative pressure, which promotes the formation of airflow, and the airflow passes through the filter along the path and sucks the dust and other debris into the dust cup for collection. However, as the use time accumulates, the dust adsorbed on the filter increases, which will eventually cause the filter to be clogged, thereby affecting the cleaning effect and device performance.

[0004] To solve this technical problem, a cleaning device with a self-cleaning mechanism has emerged and is widely used in barrel-type vacuum cleaners. Users only need to simply operate the self-cleaning mechanism to switch the cleaning device from a normal working state to a self-cleaning state, at which time the airflow at least partially impacts the filter in the reverse direction to achieve the purpose of cleaning the filter.

[0005] However, when the self-cleaning mechanism is applied to a handheld vacuum cleaner, problems also arise. Since the size of the dust cup of a handheld vacuum cleaner is much smaller than that of a barrel-type vacuum cleaner, and the dust cup is directly connected to the suction head, this causes the vacuum cleaner motor to suck in air from the outside (air supplementing port) during the self-cleaning process, which increases the air pressure and airflow inside the dust cup, and the dust in the dust cup is easily ejected from the suction head, which is known as the "dust ejection" phenomenon, which seriously affects the cleaning effect.

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

[0007] The purpose of the present application is to provide a cleaning device to reduce the "dust ejection" phenomenon during the self-cleaning process.

[0008] To achieve the above purpose, the present application provides a cleaning device, comprising:

[0009] a self-cleaning mechanism for switching the cleaning device 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 for generating negative pressure to form the airflow;

[0012] a dust cup for collecting dirt, the filter being located in the dust cup;

[0013] a duct housing located between the filter and the motor, the duct housing being provided with an air outlet for communicating with the outside air, the duct housing being formed with a motor air inlet channel for communicating the dust cup with a motor inlet end, and a motor air outlet channel for communicating a motor outlet end with the air outlet;

[0014] the duct housing is further provided with a self-cleaning opening located above the filter and arranged between the motor air inlet channel and the motor air outlet channel to communicate a first end of the motor air inlet channel with a last end of the motor air outlet channel;

[0015] in the normal working state, the air outlet is in an open state, and the self-cleaning opening is in a closed state, the airflow is discharged after passing through the motor air inlet channel and the motor air outlet channel in sequence;

[0016] in the self-cleaning state, the air outlet is in a closed state, and the self-cleaning opening is in an open state, the first end and the last end of the motor air inlet channel and the motor air outlet channel are connected in series to form a circulation loop.

[0017] in the self-cleaning state, the airflow forms a circulation loop between the motor air inlet channel and the motor air outlet channel, ensuring that the airflow can effectively impact the filter in the reverse direction, and since the airflow is circulated internally, no air is introduced from the external environment, so the overall airflow (air volume) is small, the speed and power of the airflow are relatively moderate, the impact on the dust in the dust cup is small, and the "dust spraying" phenomenon can be reduced, and the small airflow is quickly sucked away by the motor, further reducing the impact on the dust in the dust cup.

[0018] As a further improvement of the utility model, the duct housing is provided with a partition wall to divide the space of the duct housing into multiple chambers, the multiple chambers at least include:

[0019] a sixth chamber, the sixth chamber being in communication with the dust cup and the motor inlet end, the motor air inlet channel being formed in the sixth chamber;

[0020] a seventh chamber, the seventh chamber being in communication with the motor outlet end and the air outlet, the motor air outlet channel being formed in the seventh chamber, and the self-cleaning opening being formed on the partition wall to communicate the sixth chamber and the seventh chamber.

[0021] The internal space of the air duct shell is divided into multiple chambers by the partition wall, so as to facilitate more accurate control and guidance of the airflow. The sixth chamber is formed as an area of the motor air inlet channel, is connected with the dust cup and the motor inlet end, and is responsible for guiding the airflow from the dust cup to the motor. The seventh chamber is formed as an area of the motor air outlet channel, is connected with the motor outlet end and the air outlet, and is responsible for guiding the airflow from the motor to the air outlet. Meanwhile, the seventh chamber is in communication with the sixth chamber through the self-cleaning opening, so as to realize a circulation loop of the airflow in the self-cleaning state.

[0022] As a further improvement of the utility model, the seventh chamber is further provided with a gas supplement opening in communication with external gas;

[0023] In the self-cleaning state, the gas supplement opening and the self-cleaning opening are in an open state, and the external gas enters the seventh chamber from the gas supplement opening.

[0024] The gas supplement opening provided in the seventh chamber is used as an air outlet in the normal working state to discharge clean air. In the self-cleaning state, a circulation loop is formed between the motor air inlet channel and the motor air outlet channel, and a small amount of external gas enters through the gas supplement opening to enhance the air volume of the circulating airflow, so that the filter can be more effectively impacted and the blockage can be removed, thereby solving the problem of incomplete cleaning caused by small circulating air volume.

[0025] As a further improvement of the utility model, the opening size of the gas supplement opening is smaller than the opening size of the air outlet.

[0026] The main function of the gas supplement opening is auxiliary, and the air outlet is the main channel for discharging the air filtered and treated from the cleaning device. The smaller gas supplement opening can more accurately control the gas supplement amount, so that excessive air is prevented from entering the air duct shell and causing the problem of "dust spraying".

[0027] As a further improvement of the utility model, the air duct shell comprises:

[0028] a shell body, the partition wall is arranged in the shell body;

[0029] a shell upper cover, the shell upper cover is arranged on the shell body and cooperates with the partition wall to jointly define the seventh chamber, and the air outlet and the gas supplement opening are arranged on the shell upper cover and are arranged adjacent to each other.

[0030] The shell upper cover is tightly matched with the shell body, so that no gap is formed between the partition wall and the shell upper cover, and the seventh chamber is formed in a sealed manner. The partition wall in the shell body and the shell upper cover are reasonably arranged, so that the internal structure of the air duct shell is compact and the space utilization is reasonable.

[0031] As a further improvement of the utility model, the self-cleaning mechanism comprises:

[0032] The operation member is at least partially exposed outside the air duct shell;

[0033] The third valve member is in the form of a plate as a whole, and is arranged between the self-cleaning opening and the air outlet, and the third valve member can be driven to close one of the self-cleaning opening and the air outlet and open the other.

[0034] As a further improvement of the utility model, the cleaning device comprises a flow guide member arranged in the sixth chamber and located below the self-cleaning opening to guide the airflow entering the sixth chamber from the self-cleaning opening to the filter.

[0035] The flow guide member can effectively guide the airflow entering the sixth chamber from the self-cleaning opening to the filter, ensuring that the airflow can cover as much of the surface of the filter as possible in the self-cleaning state, thereby improving the cleaning efficiency. Through the guidance of the flow guide member, the airflow can impact the surface of the filter more uniformly, effectively removing dust and impurities attached to the filter and restoring the performance of the filter.

[0036] As a further improvement of the utility model, a first passage opening is formed in the sixth chamber, the flow guide member comprises a second passage opening arranged thereon, the second passage opening is arranged in communication with the first passage opening, and the first passage opening and the second passage opening are located on the motor air inlet passage, and the airflow flows to the motor in sequence through the second passage opening and the first passage opening.

[0037] The flow guide member further comprises a flow guide wall extending outwardly from the second passage opening, and at least part of the flow guide wall is located directly below the self-cleaning opening.

[0038] The flow guide wall is located directly below the self-cleaning opening, can effectively guide the airflow entering from the self-cleaning opening to the periphery of the filter, and make the airflow cover as much of the surface of the filter as possible, thereby enhancing the self-cleaning effect. The flow guide member is fixedly arranged in the sixth chamber, thereby optimizing the utilization of the space inside the air duct shell and making the structure of the air duct shell more compact.

[0039] As a further improvement of the utility model, the flow guide member comprises a plurality of spray columns extending from the self-cleaning opening to the filter, so that the gas in the seventh chamber is affected by the negative pressure generated by the motor and reversely impacts the filter through the plurality of spray columns.

[0040] The flow guide wall is located directly below the self-cleaning opening and can effectively guide the airflow entering from the self-cleaning opening to the periphery of the filter, so as to cover the entire surface of the filter as much as possible and enhance the self-cleaning effect. The flow guide member is fixedly arranged in the sixth chamber, thereby optimizing the space utilization inside the air duct shell and making the structure of the air duct shell more compact.

[0041] As a further improvement of the utility model, the plurality of spray columns are uniformly arranged and are away from the dust cup side of the filter.

[0042] The uniformly arranged spray columns ensure that the airflow is uniformly distributed when impacting the filter, avoid local airflow being too concentrated or dispersed, and improve the cleaning efficiency. Meanwhile, the uniformly arranged spray columns reduce turbulence and vortex of the airflow in the flow process, and reduce energy loss. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 The overall structure schematic diagram of the cleaning device is provided for an embodiment of the application;

[0044] Figure 2 The explosion structure schematic diagram of the cleaning device is provided for an embodiment of the application;

[0045] Figure 3 The structure schematic diagram of the air duct shell is provided for an embodiment of the application;

[0046] Figure 4 The longitudinal section structure schematic diagram of the cleaning device in a normal working state is provided for an embodiment of the application;

[0047] Figure 5 The longitudinal section structure schematic diagram of the cleaning device in a self-cleaning state is provided for an embodiment of the application;

[0048] Figure 6 The structure schematic diagram of the air duct shell is provided for another embodiment of the application;

[0049] Figure 7 The longitudinal section structure schematic diagram of the cleaning device in a normal working state is provided for another embodiment of the application;

[0050] Figure 8 The longitudinal section structure schematic diagram of the cleaning device in a self-cleaning state is provided for another embodiment of the application;

[0051] Figure 9 The structure schematic diagram of the flow guide member is provided for an embodiment of the application;

[0052] Figure 10 The explosion structure schematic diagram of the cleaning device is provided for another embodiment of the application;

[0053] Figure 11 A longitudinal sectional structure schematic view of the cleaning device in a normal working state according to another embodiment of the present application is provided.

[0054] Figure 12 A longitudinal sectional structure schematic view of the cleaning device in a self-cleaning state according to another embodiment of the present application is provided.

[0055] Figure 13 A structure schematic view of the air duct shell according to another embodiment of the present application is provided.

[0056] Figure 14 A structure schematic view of the flow guide according to another embodiment of the present application is provided.

[0057] In the figure: 100, cleaning device; 110, self-cleaning mechanism; 120, filter; 130, motor; 140, air duct shell; 150, dust cup; 160, outer shell; 170, flow guide; 190, battery pack; 1113, sealing element; 1114, third valve element; 112, operating element; 113, return spring; 131, motor inlet end; 132, motor outlet end; 141, dust filtering air duct; 142, self-cleaning air duct; 143, first opening; 144, second opening; 145, self-cleaning opening; 146, air supplementing port; 1418, shell main body; 1419, shell upper cover; 1422, sixth chamber; 14221, first passage opening; 1423, seventh chamber; 161, exhaust port; 171, second passage opening; 172, flow guide wall; 173, jet column. 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 mechanism, method, or function made by those skilled in the art based on the embodiments are included in the protection scope of the present application.

[0059] The terms for indicating spatial relative positions such as "upper", "lower", "left", "right", "front", "back", and the like used herein are for the purpose of facilitating the description to describe the relationship of one feature relative to another feature as shown in the drawings. It can be understood that the terms for indicating spatial relative positions can be intended to include different orientations other than the orientations shown in the drawings, and should not be understood as limiting the claims. In addition, the description 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] In the field of cleaning devices, such as vacuum cleaners, conventional configurations are provided with components such as filters, motors and dust cups. In normal operation, the motor operates to generate negative pressure, which facilitates the formation of airflow, and the airflow follows the path through the filter and sucks the dust and other debris into the dust cup for collection. However, as the use time accumulates, the dust adsorbed on the filter increases, which will eventually cause the filter to be blocked, thereby affecting the cleaning effect and device performance.

[0061] To solve this technical problem, a cleaning device with a self-cleaning mechanism has emerged and is widely used in barrel-type vacuum cleaners. Users can simply operate the self-cleaning mechanism to switch the cleaning device from a normal working state to a self-cleaning state, at which time the airflow at least partially impacts the filter in the reverse direction to achieve the purpose of cleaning the filter.

[0062] However, when the self-cleaning mechanism is applied to a handheld vacuum cleaner, problems also arise. Since the size of the dust cup of the handheld vacuum cleaner is much smaller than that of the barrel-type vacuum cleaner, and the dust cup is directly connected to the suction head, which results in that during the self-cleaning process, the motor of the vacuum cleaner sucks air from the outside (air inlet), which increases the air pressure and airflow inside the dust cup, and the dust in the dust cup is easily ejected from the suction head, which is called the "dust ejection" phenomenon, which seriously affects the cleaning effect.

[0063] The present application provides a cleaning device to improve the prior art.

[0064] Figures 1 to 14 A cleaning device 100 provided by the present application is shown, which comprises:

[0065] A self-cleaning mechanism 110 for switching the cleaning device 100 from a normal working state to a self-cleaning state when operated by a user;

[0066] A filter 120, in the normal working state, the airflow passes through the filter 120 in the forward direction, and in the self-cleaning state, the airflow at least partially impacts the filter 120 in the reverse direction;

[0067] A motor 130 for generating negative pressure to form the airflow;

[0068] A dust cup 150 for collecting dirt, the filter 120 is located inside the dust cup 150;

[0069] An air duct housing 140, the air duct housing 140 is located between the filter 120 and the motor 130, the air duct housing 140 is provided with an air outlet for communicating with the outside air, the air duct housing 140 is formed with a motor air inlet channel for communicating the dust cup 150 with the motor inlet end 131, and a motor air outlet channel for communicating the motor outlet end 132 with the air outlet;

[0070] The air duct housing 140 is further provided with a self-cleaning opening 145, which is located above the filter 120 and is arranged between the motor air inlet passage and the motor air outlet passage to connect the head of the motor air inlet passage and the tail of the motor air outlet passage;

[0071] In the normal working state, the air outlet is in an open state, and the self-cleaning opening 145 is in a closed state, and the airflow is discharged after passing through the motor air inlet passage and the motor air outlet passage in sequence;

[0072] In the self-cleaning state, the air outlet is in a closed state, and the self-cleaning opening 145 is in an open state, and the head and tail of the motor air inlet passage and the motor air outlet passage are connected in series to form a circulation loop.

[0073] The self-cleaning mechanism 110 is a control mechanism for realizing the self-cleaning function in the cleaning device 100, and the user triggers the device to change from the normal working state to the self-cleaning state by operating the self-cleaning mechanism 110.

[0074] In the normal working state, the airflow passes through the filter 120 in the conventional dust filtering direction, and the filter 120 intercepts dust, sundries, etc., to ensure that the discharged air is relatively clean. In the self-cleaning state, the airflow direction is adjusted to at least partially impact the filter 120 in the reverse direction, and the reverse airflow is used to remove the accumulated blockages on the filter 120 to restore its filtering performance.

[0075] The air duct housing 140 is located between the filter 120 and the motor 130, which provides a channel structure for guiding the airflow to flow between the filter 120 and the motor 130. Part of the self-cleaning mechanism 110 is arranged in the air duct housing 140, so as to realize the control of the airflow direction in the air duct housing 140 by operating the self-cleaning mechanism 110, that is, the switching between the normal working state and the self-cleaning state.

[0076] The air duct shell 140 has a motor air inlet channel and a motor air outlet channel inside. The motor air inlet channel is connected to the dust cup 150 and the motor inlet end 131, and the motor air outlet channel is connected to the motor outlet end 132 and the air outlet on the air duct shell 140. Therefore, in this embodiment, the first end of the motor air inlet channel refers to the entrance of the airflow into the motor air inlet channel, which is located on the side of the air duct shell 140 close to the dust cup 150, connected to the downstream of the dust cup 150 or the filter 120, and can be understood as the end of the air duct shell 140 connected to the dust cup 150 or the filter 120. The end of the motor air outlet channel refers to the position of the airflow flowing out of the motor air outlet channel. Since there are two openings at the end of the motor air outlet channel, the air outlet and the self-cleaning opening 145, it can be understood that in the normal working state, the end of the motor air outlet channel is the air outlet, and in the self-cleaning state, the end of the motor air outlet channel is the self-cleaning opening 145.

[0077] Referring to Figure 4 In the normal working state, the air outlet is open, and the self-cleaning opening 145 is closed. The airflow starts from the dust cup 150 inlet, passes through the motor air inlet channel into the motor 130, then flows out of the motor 130, passes through the motor air outlet channel to the air outlet, and finally is discharged outside the cleaning device 100. Thus the entire airflow can be referred to as the dust filtering air duct 141, that is, in the normal working state, the motor air inlet channel and the motor air outlet channel belong to part of the dust filtering air duct 141. In this process, the dust in the airflow is blocked by the filter 120, ensuring that the dust and other contaminants are brought into the dust cup 150, and the clean air filtered by the filter 120 is discharged.

[0078] Referring to Figure 5 In the self-cleaning state, the air outlet is closed, and the self-cleaning opening 145 is open. At this time, the motor air inlet channel and the motor air outlet channel form a circulation loop through the self-cleaning opening 145, which is the self-cleaning air duct 142, that is, in the self-cleaning state, the motor air inlet channel and the motor air outlet channel jointly constitute the self-cleaning air duct 142. The airflow flows back from the end of the motor air outlet channel to the first end of the motor air inlet channel through the self-cleaning opening 145, forming an internal circulation. Using this circulating airflow, the filter 120 can be impacted in the opposite direction, removing the blockage on the filter 120 and achieving the self-cleaning function.

[0079] In the self-cleaning state, the airflow forms a circulation loop between the motor air inlet channel and the motor air outlet channel, ensuring that the airflow can effectively impact the filter 120 in the opposite direction. At the same time, since no air is introduced from the external environment, the overall airflow (air volume) is relatively small, the speed and power of the airflow are relatively moderate, the impact on the dust in the dust cup 150 is small, and the "dust spraying" phenomenon can be reduced. At the same time, the small airflow is quickly sucked away by the motor, further reducing the impact on the dust in the dust cup 150.

[0080] In some embodiments, the cleaning device 100 further comprises a battery pack 190 or a power cord, which is selected according to the type of power supply and the power requirement of the cleaning device, which will not be described here.

[0081] Further, with continued reference to Figures 2 to 5 , the air duct housing 140 is provided with a partition wall to divide the space of the air duct housing 140 into a plurality of chambers, including at least:

[0082] A sixth chamber 1422, which is in communication with the dust cup 150 and the inlet end 131 of the motor 130, and the motor inlet passage is formed in the sixth chamber 1422;

[0083] A seventh chamber 1423, which is in communication with the outlet end 132 of the motor 130 and the air outlet, and the motor outlet passage is formed in the seventh chamber 1423, and the self-cleaning opening 145 is formed on the partition wall to communicate the sixth chamber 1422 and the seventh chamber 1423.

[0084] The sixth chamber 1422 is in communication with the dust cup 150 and the inlet end of the motor 130. Therefore, it can be understood that the above-mentioned motor inlet passage is formed in the sixth chamber 1422. The position and chamber structure of the sixth chamber 1422 enable it to be connected with the outlet of the dust cup 150 or downstream of the filter 120, to receive the airflow from the dust cup 150. At the same time, being connected with the inlet end of the motor 130 enables it to guide the airflow to the motor 130.

[0085] The seventh chamber 1423 is in communication with the outlet end of the motor 130 and the air outlet. Therefore, it can be understood that the above-mentioned motor outlet passage is formed in the seventh chamber 1423. In the normal working state, the airflow flows from the seventh chamber 1423 to the air outlet and is discharged from the cleaning device 100. The self-cleaning opening 145 is provided on the partition wall between the sixth chamber 1422 and the seventh chamber 1423, and when the self-cleaning opening 145 is opened, the airflow can circulate between the sixth chamber 1422 and the seventh chamber 1423, forming a circulation loop required for self-cleaning.

[0086] The internal space of the air duct shell 140 is divided into multiple chambers by the partition wall, so as to facilitate more accurate control and guidance of the air flow. The sixth chamber 1422 serves as a forming area of the motor air inlet channel, connects the dust cup 150 and the motor inlet end 131, and is responsible for guiding the air flow from the dust cup 150 to the motor 130. The seventh chamber 1423 serves as a forming area of the motor air outlet channel, connects the motor outlet end 132 and the air outlet, and is responsible for guiding the air flow from the motor 130 to the air outlet. At the same time, the self-cleaning opening 145 is in communication with the sixth chamber 1422 to realize a circulation loop of the air flow in the self-cleaning state.

[0087] Further, the seventh chamber 1423 is also provided with a supplementary air inlet 146 which is in communication with the external air;

[0088] In the self-cleaning state, the supplementary air inlet 146 and the self-cleaning opening 145 are in an open state, and the external air enters the seventh chamber 1423 from the supplementary air inlet 146.

[0089] It can be understood that, due to the small amount of air in the circulation loop, there is a situation that the filter 120 is not cleaned to the required standard, and therefore an additional supplementary air inlet 146 which is in communication with the external air is arranged on the seventh chamber 1423, and the purpose is to introduce external air through the supplementary air inlet 146 in the self-cleaning state to increase the total amount of air flow and ensure the self-cleaning effect. The supplementary air inlet 146 itself or upstream is usually equipped with a filter screen to prevent large particles from the outside from entering.

[0090] The supplementary air inlet 146 is not only used to introduce external air to increase the total amount of air flow and improve the self-cleaning effect in the self-cleaning state, but also can be used as an air outlet to discharge filtered clean air in the normal working state.

[0091] Referring to Figures 6 to 8 When the cleaning device 100 is in the normal working state, the motor 130 operates to generate negative pressure, and the air flow enters the motor air inlet channel (the sixth chamber 1422) from the dust cup 150 through the filter 120, and then flows to the supplementary air inlet 146 and the air outlet through the motor air outlet channel (the seventh chamber 1423). At this time, the supplementary air inlet 146 is in an open state, allowing clean air to be discharged from the cleaning device 100.

[0092] When the user operates the self-cleaning mechanism 110, the air outlet is closed, and at this time the supplementary air inlet 146 and the self-cleaning opening 145 are opened at the same time, and the external air is sucked into the seventh chamber 1423 through the supplementary air inlet 146 (affected by the air flow in the circulation loop), and then flows back to the sixth chamber 1422 through the self-cleaning opening 145, forming an enhanced circulating air flow to improve the efficiency of self-cleaning.

[0093] The air supplement port 146 arranged in the seventh chamber 1423 is used as an air outlet in the normal working state to discharge clean air; in the self-cleaning state, the main air flow forms a circulation loop between the motor air inlet channel and the motor air outlet channel, and a small amount of external air enters through the air supplement port to increase the air volume of the circulating air flow, so that the filter can be more effectively impacted and the blockage can be removed, thereby solving the problem of incomplete cleaning caused by small circulating air volume.

[0094] Since the main function of the air supplement port 146 is auxiliary, it does not need a large opening area. Therefore, the opening size of the air supplement port 146 is smaller than that of the air outlet.

[0095] The air outlet is the main channel for discharging the air filtered and treated out of the cleaning device 100, and the small air supplement port 146 can more accurately control the air supplement amount, thereby avoiding too much air entering the air duct shell 140 and causing the "dust spraying" problem.

[0096] In the embodiment, the air duct shell 140 includes:

[0097] The shell body 1418, the partition wall is arranged in the shell body 1418;

[0098] The shell upper cover 1419 is arranged on the shell body 1418 and cooperates with the partition wall to jointly define the seventh chamber 1423, and the air outlet and the air supplement port 146 are arranged on the shell upper cover 1419 and adjacent to each other.

[0099] Referring to Figure 3 and Figure 6 , the shell body 1418 is the main part of the air duct shell 140, the shell body 1418 has a first opening 143 connected to the dust cup 150 or the filter 120 and a second opening 144 connected to the motor 130, and the partition wall is arranged inside to divide the internal space of the shell body 1418 into multiple chambers to facilitate accurate control and guidance of the air flow. The shell upper cover 1419 is arranged on the shell body 1418 and cooperates with the partition wall in the shell body 1418 to jointly define the seventh chamber 1423. When the air supplement port 146 exists, the air outlet and the air supplement port 146 are both arranged on the shell upper cover 1419 and adjacent to each other, which helps to optimize the air flow path and reduce the resistance and interference of the air flow during the discharging or introduction process.

[0100] Among them, the partition wall and the side wall of the shell body 1418 jointly enclose the motor air inlet channel, i.e., the channel connecting the dust cup and the motor. Other areas can constitute the motor air outlet channel, i.e., the channel connecting the air outlet and the self-cleaning opening and the motor.

[0101] In the assembly process, the shell upper cover 1419 is tightly fitted with the shell main body 1418, ensuring that there is no gap between the partition wall and the shell upper cover 1419, forming a sealed seventh chamber 1423. Through the reasonable arrangement of the partition wall in the shell main body 1418 and the shell upper cover 1419, the internal structure of the air duct shell 140 is compact and the space is reasonably utilized.

[0102] In the embodiment, the self-cleaning mechanism 110 comprises:

[0103] The operating member 112 is at least partially exposed outside the air duct shell 140;

[0104] The third valve member 1114 is in the form of a plate as a whole and is arranged between the self-cleaning opening 145 and the air outlet, and the third valve member 1114 can be driven to close one of the self-cleaning opening 145 and the air outlet and open the other.

[0105] Referring to Figures 3 to 8 , the operating member 112 is located in the upper part of the cleaning device 100 and is exposed to the shell upper cover 1419. The operating member 112 is a component for the user to interact with the cleaning device 100 and is used to trigger the self-cleaning mechanism 110 and switch the cleaning device 100 from the normal working state to the self-cleaning state. The third valve member 1114 is located inside the shell main body 1418 and is close to the shell upper cover 1419. The third valve member 1114 is in the form of a plate as a whole and is located between the self-cleaning opening 145 and the air outlet. The third valve member 1114 is a rotating member and has a rotating shaft. The operating member 112 is located directly above the third valve member 1114 and can convert the movement of the operating member 112 in the vertical direction into the rotation of the third valve member 1114 in the rotating direction, so as to close one of the self-cleaning opening 145 and the air outlet and open the other. The operating member 112 can be arranged close to the center of the air duct shell 140 or close to the front end of the air duct shell 140, as shown in Figures 10 to 13 , which is not limited here.

[0106] In addition, the user can press the operating member 112 multiple times in a short period of time, so that the cleaning device switches between the normal working state and the self-cleaning state multiple times, thereby causing the airflow to oscillate and also enhancing the self-cleaning effect.

[0107] Continuing to refer to Figure 2 , in the embodiment, at least one of the operating member 112 and the third valve member 1114 is provided with a reset spring 113 to apply an elastic force to the operating member 112 and / or the third valve member 1114 to move to the normal working state position.

[0108] Referring to Figure 2 and Figure 3The third valve 1114 is located between the self-cleaning opening 145 and the air outlet, and can be driven to rotate to close the self-cleaning opening 145 or the air outlet. In order to enhance the sealing effect, the two side surfaces of the third valve 1114 are provided with sealing members 1113 matched with the opening size of the self-cleaning opening 145 and the air outlet.

[0109] In some embodiments, the cleaning device 100 further comprises an outer shell 160 arranged outside the air duct shell 140, and the operating member 112 is exposed to the outer shell 160 for user operation. The outer shell 160 mainly plays a role of protecting the internal structure, and a holding portion for user holding is formed thereon. The specific structure of the outer shell 160 is not described here.

[0110] In the present embodiment, the cleaning device 100 comprises a flow guide 170 arranged in the sixth chamber 1422, and the flow guide 170 is located below the self-cleaning opening 145 to guide the airflow entering the sixth chamber 1422 from the self-cleaning opening 145 to the filter 120.

[0111] Referring to Figures 7 to 9 The flow guide 170 is mounted inside the sixth chamber 1422 of the cleaning device 100 and is fixedly connected with the air duct shell 140. For example, the flow guide 170 can be fixed on the wall of the sixth chamber 1422 by screws, bolts or other connecting members, or can be firmly clamped in the predetermined position by buckles, clamps or other structures, which are not limited here.

[0112] The specific position of the flow guide 170 in the sixth chamber 1422 is below the self-cleaning opening 145, so that the airflow entering the sixth chamber 1422 from the self-cleaning opening 145 can directly impact on the flow guide 170, thereby being effectively guided and adjusted in direction.

[0113] The flow guide 170 can effectively guide the airflow entering the sixth chamber 1422 from the self-cleaning opening 145 to the filter 120, ensuring that the airflow can cover all surfaces of the filter 120 as much as possible in the self-cleaning state, thereby improving the cleaning efficiency. Through the guidance of the flow guide 170, the airflow can more uniformly impact on the surface of the filter 120, effectively removing dust and impurities attached to the filter 120, and restoring the performance of the filter 120.

[0114] Further, the sixth chamber 1422 is formed with a first passage opening 14221, the flow guide 170 comprises a second passage opening 171 arranged thereon, the second passage opening 171 is arranged in communication with the first passage opening 14221, and the first passage opening 14221 and the second passage opening 171 are located on the motor air inlet channel, and the airflow flows to the motor 130 through the second passage opening 171 and the first passage opening 14221 in sequence.

[0115] The flow guide 170 further comprises a flow guide wall 172 extending outwardly from the second passage opening 171, at least part of the flow guide wall 172 is located directly below the self-cleaning opening 145.

[0116] The first passage opening 14221 is an opening formed in the sixth chamber 1422, and the airflow from the filter 120 flows to the motor inlet end 131 through the first passage opening 14221, so the first passage opening 14221 can also be called a filter outlet.

[0117] The second passage opening 171 on the flow guide 170 is in communication with the above-mentioned first passage opening 14221, which allows the airflow to flow from the filter 120 to the motor 130, and the second passage opening 171 is aligned with the first passage opening 14221 to ensure that the airflow can smoothly flow to the motor 130 after passing through the filter 120 under normal working conditions, avoiding the flow guide 170 affecting the dust filtering airflow under normal working conditions.

[0118] The flow guide wall 172 is a part of structure extending outwardly from the second passage opening 171, which further guides and adjusts the direction and distribution of the airflow, so that the airflow can more effectively impact the filter 120 or flow to the motor 130. In the specific implementation process, the shape, length and angle of the flow guide wall 172 can be adjusted according to the principle of airflow dynamics and actual needs.

[0119] The flow guide wall 172 is located directly below the self-cleaning opening 145, which can effectively guide the airflow entering from the self-cleaning opening 145 to the periphery of the filter 120, so as to cover the entire surface of the filter 120 as much as possible, thereby enhancing the self-cleaning effect. The flow guide 170 is fixedly arranged in the sixth chamber 1422, which optimizes the space utilization inside the air duct shell 140, making the structure of the air duct shell 140 more compact.

[0120] In some embodiments, the flow guide 170 comprises a plurality of spray columns 173 extending from the self-cleaning opening 145 to the filter 120, so that the gas in the seventh chamber 1423 is affected by the negative pressure generated by the motor 130 and reversely impacts the filter 120 through the plurality of spray columns 173.

[0121] Referring toFigures 11 to 14 In the self-cleaning state, the gas in the seventh chamber 1423 is driven by the motor 130 to impact the filter 120 through the spray columns 173. The arrangement of multiple spray columns 173 increases the coverage of the airflow, so that all areas of the filter 120 can be impacted by the airflow, effectively removing dust and impurities attached to the filter 120 and ensuring that the filter 120 is thoroughly cleaned. The spray columns 173 can extend downward from the flow guide wall 172.

[0122] Further, the plurality of spray columns 173 are uniformly arranged and away from the dust cup 150 on the side of the filter 120. The uniformly arranged spray columns 173 ensure that the airflow is uniformly distributed when impacting the filter 120, avoiding excessive concentration or dispersion of the local airflow and improving cleaning efficiency. At the same time, the uniformly arranged spray columns 173 reduce turbulence and vortex during the flow of the airflow, reducing energy loss.

[0123] It should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the 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.

[0124] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been 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 replaced by equivalents without departing from the spirit and scope of the present application.

Claims

1. A cleaning device, comprising: a self-cleaning mechanism for switching the cleaning device from a normal working state to a self-cleaning state when operated by a user; a filter, in the normal working state, a gas flow is passed through the filter in a forward direction, in the self-cleaning state, the gas flow at least partially impacts the filter in a reverse direction; a motor for generating negative pressure to form the gas flow; a dust cup for collecting dirt, the filter being located in the dust cup; an air duct housing, the air duct housing being located between the filter and the motor, the air duct housing being provided with an air outlet for communicating with ambient air, the air duct housing being formed with a motor air inlet channel for communicating the dust cup with a motor inlet end, and a motor air outlet channel for communicating a motor outlet end with the air outlet; characterized in that the air duct housing is further provided with a self-cleaning opening, the self-cleaning opening being located above the filter and being arranged between the motor air inlet channel and the motor air outlet channel to communicate a first end of the motor air inlet channel and a last end of the motor air outlet channel; in the normal working state, the air outlet is in an open state, and the self-cleaning opening is in a closed state, the gas flow is discharged after passing through the motor air inlet channel and the motor air outlet channel in sequence; in the self-cleaning state, the air outlet is in a closed state, and the self-cleaning opening is in an open state, the motor air inlet channel and the motor air outlet channel are connected in series to form a circulation loop.

2. The cleaning device of claim 1, wherein, the air duct housing is provided with a partition wall to divide the space of the air duct housing into a plurality of chambers, the plurality of chambers at least comprising: a sixth chamber, the sixth chamber being in communication with the dust cup and the motor inlet end, the motor air inlet channel being formed in the sixth chamber; a seventh chamber, the seventh chamber being in communication with the motor outlet end and the air outlet, the motor air outlet channel being formed in the seventh chamber, the self-cleaning opening being formed on the partition wall to communicate the sixth chamber and the seventh chamber.

3. The cleaning device of claim 2, wherein, the seventh chamber is further provided with a gas supplement opening, the gas supplement opening being in communication with ambient gas; in the self-cleaning state, the gas supplement opening and the self-cleaning opening are in an open state, the ambient gas enters the seventh chamber from the gas supplement opening.

4. The cleaning device of claim 3, wherein, the opening size of the gas supplement opening is smaller than the opening size of the air outlet.

5. The cleaning device of claim 3, wherein, the air duct housing comprises: a housing main body, the partition wall being arranged in the housing main body; a housing upper cover, the housing upper cover being arranged on the housing main body and cooperating with the partition wall to jointly define the seventh chamber, the air outlet and the gas supplement opening being arranged on the housing upper cover and being arranged adjacent to each other.

6. The cleaning device of claim 2, wherein, the self-cleaning mechanism comprises: an operating member, at least a part of the operating member being exposed outside the air duct housing; a third valve member, the third valve member being in a plate shape as a whole and being arranged between the self-cleaning opening and the air outlet, the third valve member being drivable to close one of the self-cleaning opening and the air outlet and to open the other one.

7. The cleaning device of claim 1, wherein, The cleaning device comprises a flow guide member arranged in the sixth chamber and located below the self-cleaning opening to guide the airflow entering the sixth chamber from the self-cleaning opening to the filter.

8. The cleaning device of claim 7, wherein, A first passage opening is formed in the sixth chamber, the flow guide member comprises a second passage opening arranged thereon, the second passage opening is arranged in communication with the first passage opening, and the first passage opening and the second passage opening are located on the motor air inlet channel, and the airflow flows to the motor through the second passage opening and the first passage opening in sequence. The flow guide member further comprises a flow guide wall extending outward from the second passage opening, and at least part of the flow guide wall is located directly below the self-cleaning opening.

9. The cleaning device of claim 7, wherein, The flow guide member comprises a plurality of spray columns extending from the self-cleaning opening to the filter, so that the gas in the seventh chamber is affected by the negative pressure generated by the motor and reversely impacts the filter through the plurality of spray columns.

10. The cleaning device of claim 9, wherein, The plurality of spray columns are uniformly arranged and away from the side of the filter away from the dust cup.

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