Cleaning device

Abstract

The utility model relates to the technical field of cleaning, 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, and a first communication channel for communicating the dust cup with the motor and a second communication channel for communicating external air with the dust cup are formed in the air duct shell; and at least part of the self-cleaning mechanism is arranged in the air duct shell, and the self-cleaning mechanism is used for cutting off the first communication channel and communicating with the second communication channel at the same time in a self-cleaning state, so that external air enters the air duct shell under the influence of instantaneous negative pressure generated in the dust cup and reversely impacts the filter. Due to the fact that the lasting time of the instantaneous negative pressure is short, the air volume of the air flow introduced from the outside air is small, the dust in the dust cup cannot be greatly influenced, the dust cup is in the negative pressure state, and therefore the phenomenon of'dust spraying 'can be avoided.

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 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 problem, cleaning devices with self-cleaning mechanisms have emerged and are widely used in barrel-type vacuum cleaners. Through simple operation of the self-cleaning mechanism, the cleaning device can be switched from a normal working state to a self-cleaning state, at which time the airflow at least partially impacts the filter in reverse, thereby achieving cleaning of the filter.

[0005] However, when the self-cleaning mechanism is applied to a handheld vacuum cleaner, due to the dust cup size being much smaller than that of a barrel-type vacuum cleaner, and the dust cup being directly connected to the suction head, during the self-cleaning process, the vacuum cleaner motor sucks in air from the outside (air supplementing port), causing the air pressure and airflow inside the dust cup to increase, and the dust in the dust cup is easily ejected from the suction head, i.e., 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 in the self-cleaning state.

[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 a forward direction, and in the self-cleaning state, the airflow at least partially impacts the filter in a reverse direction;

[0011] a motor for generating negative pressure to form the airflow;

[0012] A dust cup for collecting dirt, wherein the filter is arranged in the dust cup;

[0013] The cleaning device further comprises:

[0014] An air duct housing located between the filter and the motor, wherein a first communication passage is formed in the air duct housing to communicate the dust cup and the motor, and a second communication passage is formed in the air duct housing to communicate ambient air and the dust cup;

[0015] At least part of the self-cleaning mechanism is arranged in the air duct housing, and the self-cleaning mechanism is configured to, in a self-cleaning state, cut off the first communication passage while communicating the second communication passage, so that the ambient air is introduced into the air duct housing under the influence of the instantaneous negative pressure generated in the dust cup and reversely impacts the filter.

[0016] The self-cleaning mechanism changes the path of the air flow by simultaneously cutting off the first communication passage and communicating the second communication passage, introduces the ambient air into the air duct housing by using the instantaneous negative pressure generated in the dust cup, and cleans the filter in a reverse impact manner, thereby achieving the self-cleaning function. Since the duration of the instantaneous negative pressure is relatively short, the air volume of the air flow introduced from the ambient air is relatively small, which does not have a relatively large impact on the dust in the dust cup, and the dust cup is in a negative pressure state, so the phenomenon of "dust spraying" can be avoided.

[0017] As a further improvement of the utility model, the self-cleaning mechanism comprises:

[0018] A fourth valve arranged in the first communication passage to communicate or cut off the first communication passage;

[0019] A fifth valve arranged in the second communication passage to communicate or cut off the second communication passage;

[0020] An operating member, at least part of which is exposed outside the air duct housing for user operation, wherein the operating member can drive the fourth valve and the fifth valve to move to cut off one of the first communication passage and the second communication passage and to communicate the other one.

[0021] Through the arrangement of the fourth valve, the fifth valve and the operating member, the self-cleaning mechanism can be flexibly switched between different working states to meet the different air flow path requirements of the cleaning device in the normal cleaning and self-cleaning modes, thereby improving the working efficiency and user experience of the entire device.

[0022] As a further improvement of the utility model, a plurality of partition walls are arranged in the air duct housing to divide the space of the air duct housing into a plurality of chambers, wherein the plurality of chambers at least comprise:

[0023] an eleventh chamber in communication with the dust cup;

[0024] a twelfth chamber in communication with the motor inlet end, the twelfth chamber being in communication with the eleventh chamber through a filter outlet formed on the partition wall, the filter outlet being located on the first communication passage, and the fourth valve being arranged on the filter outlet to open or close the filter outlet;

[0025] a thirteenth chamber in communication with the eleventh chamber through a self-cleaning opening formed on the partition wall, the fifth valve being arranged on the self-cleaning opening to open or close the self-cleaning opening, and the thirteenth chamber being provided with a first air supplement opening in communication with the external gas, the first air supplement opening and the self-cleaning opening being located on the second communication passage.

[0026] As a further improvement of the utility model, the twelfth chamber is further provided with a second air supplement opening in communication with the external gas, and a third communication passage is further formed in the air duct shell, the third communication passage sequentially communicating the second air supplement opening, the twelfth chamber and the motor.

[0027] The self-cleaning mechanism is further used for, in the self-cleaning state, cutting off the first communication passage while communicating the third communication passage.

[0028] In the self-cleaning state, when the first communication passage is cut off, the second air supplement opening can provide additional air for the motor, ensuring the stable operation of the motor. Through the second air supplement opening, external air can directly enter the twelfth chamber and flow to the motor, avoiding the phenomenon of motor overload caused by insufficient air intake due to the cutting off of the first communication passage, and ensuring the safety and reliability of the motor.

[0029] As a further improvement of the utility model, the fourth valve is in the form of a plate as a whole, the second air supplement opening and the filter outlet are respectively located on two sides of the fourth valve, and the fourth valve can be driven to close one of the second air supplement opening and the filter outlet and open the other.

[0030] As a further improvement of the utility model, the plurality of chambers further comprises:

[0031] a fourteenth chamber in communication with the motor outlet end, the fourteenth chamber being provided with an air outlet, and the motor outlet end being in communication with the external gas through the air outlet.

[0032] As a further improvement of the utility model, the air duct shell is in the form of a columnar structure as a whole, and the plurality of partition walls comprise:

[0033] a seventh partition wall extending in a horizontal direction to cooperatively define the eleventh chamber with the sidewall of the housing body, the filter outlet being formed on the seventh partition wall;

[0034] an eighth partition wall extending upwardly from the seventh partition wall and surrounding the filter outlet and the motor inlet end;

[0035] a ninth partition wall extending upwardly from the seventh partition wall and surrounding the self-cleaning opening and the first air supplementing port;

[0036] the eighth partition wall and the ninth partition wall cooperatively partitioning to form the twelfth chamber, the thirteenth chamber and the fourteenth chamber in the extending direction of the seventh partition wall.

[0037] The internal space of the air duct housing is partitioned into multiple chambers by the partition walls, so as to realize the air flow management and function switching of the cleaning device in different working states.

[0038] As a further improvement of the present application, the air duct housing comprises:

[0039] a housing body, the housing body being in the columnar structure as a whole, the multiple partition walls being arranged in the housing body, the air outlet and the first air supplementing port being arranged on the sidewall of the columnar structure;

[0040] a housing upper cover, the housing upper cover being arranged on the housing body;

[0041] the twelfth chamber is further provided with a second air supplementing port in communication with the external air, the second air supplementing port being arranged on the housing upper cover.

[0042] As a further improvement of the present application, the air duct housing has a first opening in air flow communication with the filter, a second opening in air flow communication with the motor and a third opening, the self-cleaning mechanism being at least partially exposed from the third opening to provide user operation;

[0043] The air duct housing has two end faces, the third opening being located at a first end face, the first opening being located at a second end face, and the sidewall being connected between the first end face and the second end face.

[0044] The first opening of the air duct shell end face is in airflow communication with the dust cup or the filter, the second opening of the side face is in airflow communication with the motor, the airflow diversion corner is small, the path is more reasonable, the space of the air duct shell is further compressed, so that the overall structure is more compact, meanwhile, the path of the dust cup and the motor is shortened, so that the airflow path is more direct. The self-cleaning mechanism is at least partially exposed from the third opening, so as to facilitate user operation, realize quick switching of the cleaning device between the normal working state and the self-cleaning state. Meanwhile, the arrangement of the first opening, the second opening and the third opening is also beneficial to the compact design of the whole cleaning device and saves space.

[0045] As a further improvement of the utility model, the air duct shell, the filter and the dust cup are arranged in the direction of the first axis, and the first axis and the axis of the motor are perpendicular.

[0046] The first axis and the axis of the motor are perpendicular to each other, so that the installation direction of the motor forms a right angle with the arrangement direction of the air duct shell and other components, which is helpful to reasonably utilize the space and optimize the volume and shape of the whole cleaning device. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 The overall structure schematic diagram of the cleaning device provided by an embodiment of the utility model is shown in the figure.

[0048] Figure 2 The explosion structure schematic diagram of the cleaning device provided by an embodiment of the utility model is shown in the figure.

[0049] Figure 3 The structure schematic diagram of the air duct shell provided by an embodiment of the utility model is shown in the figure.

[0050] Figure 4 The longitudinal section structure schematic diagram of the cleaning device in the normal working state provided by an embodiment of the utility model is shown in the figure.

[0051] Figure 5 The longitudinal section structure schematic diagram of the cleaning device in the self-cleaning state provided by an embodiment of the utility model is shown in the figure.

[0052] Figure 6 The position schematic diagram of the section line of the cleaning device provided by an embodiment of the utility model is shown in the figure.

[0053] Figure 7 For Figure 6 The sectional view at D-D.

[0054] Figure 8 The airflow flow direction schematic diagram in the air duct shell provided by an embodiment of the utility model is shown in the figure.

[0055] In the figure: 100, cleaning device; 110, self-cleaning mechanism; 120, filter; 130, motor; 140, air duct shell; 150, dust cup; 160, outer shell; 190, battery pack; 1115, fourth valve; 1116, fifth valve; 112, operating piece; 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; 1461, first air supplementing opening; 1462, second air supplementing opening; 1416, air outlet; 1417, filtering outlet; 1418, shell main body; 1419, shell upper cover; 1429, eleventh chamber; 1430, twelfth chamber; 1431, thirteenth chamber; 1438, fourteenth chamber; 1427, first communication channel; 1428, second communication channel; 1432, third communication channel; 161, air exhaust; 1439, seventh partition wall; 1440, eighth partition wall; 1441, ninth partition wall. DETAILED DESCRIPTION

[0056] The embodiments shown in the drawings will be described in detail below. However, the embodiments do not limit the present application, and the changes made by those skilled in the art to the mechanisms, methods, or functions based on the embodiments are included in the protection scope of the present application.

[0057] The terms used herein, such as "upper", "lower", "left", "right", "front", "back", and the like, which indicate spatial relative positions, are used 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 of 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 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.

[0058] Figures 1 to 8 A cleaning device provided by the present disclosure is shown, which comprises:

[0059] A self-cleaning mechanism for switching the cleaning device from a normal working state to a self-cleaning state when operated by a user;

[0060] A filter, in the normal working state, the airflow passes through the filter in a forward direction, and in the self-cleaning state, the airflow at least partially impacts the filter in a reverse direction;

[0061] A motor for generating negative pressure to form the airflow;

[0062] A dust cup for collecting dirt; the filter is arranged in the dust cup;

[0063] The cleaning device further comprises:

[0064] an air duct housing located between the filter and the motor, the air duct housing being formed with a first communication passage for communicating the dust cup and the motor, and a second communication passage for communicating ambient air and the dust cup;

[0065] at least part of the self-cleaning mechanism is arranged in the air duct housing, and the self-cleaning mechanism is configured to, in the self-cleaning state, cut off the first communication passage while communicating the second communication passage, so that the ambient air is affected by the instantaneous negative pressure generated in the dust cup to enter the air duct housing and impact the filter in the reverse direction.

[0066] The self-cleaning mechanism is a control mechanism for realizing the self-cleaning function in the cleaning device, and the user triggers the device to switch from the normal working state to the self-cleaning state by operating the self-cleaning mechanism. In the normal working state, the air flow follows the conventional dust filtering path through the filter, at which time the filter blocks dust, debris and the like outside, thereby ensuring that the discharged air is relatively pure. Once the cleaning device switches to the self-cleaning state, the direction of the air flow will be adjusted, and at least part of the air flow will impact the filter in the reverse direction, thereby cleaning the accumulated blockages on the filter by the impact force of the reverse air flow, so that the filtering function of the filter is restored.

[0067] The air duct housing is located between the filter and the motor, and it builds a passage structure for guiding the air flow to flow between the filter and the motor. Part of the self-cleaning mechanism is arranged in the air duct housing, so as to realize the control of the air flow direction in the air duct housing by operating the self-cleaning mechanism, i.e. the switching between the normal working state and the self-cleaning state.

[0068] The first communication passage formed in the air duct housing is used to communicate the dust cup and the motor (motor inlet end) in the normal working state, and the first communication passage is equivalent to the motor air inlet passage.

[0069] The second communication passage is also located in the air duct housing and is used to communicate the ambient air and the dust cup. It mainly functions in the self-cleaning state to provide a passage for the ambient air to enter the air duct housing and further enter the dust cup, so that fresh ambient air can be introduced during the self-cleaning process, creating conditions for the air flow to impact the filter in the reverse direction.

[0070] In the self-cleaning state, the self-cleaning mechanism mainly performs two key operations: one is to cut off the first communication channel, and the other is to communicate the second communication channel. Cutting off the first communication channel means preventing the airflow from continuing to flow from the dust cup to the motor according to the normal working state path. It is realized by the action of the valve or other movable parts in the self-cleaning mechanism to block the first communication channel. At the same time, the self-cleaning mechanism communicates the second communication channel, so that the external gas can enter the air duct shell. At this time, since the first communication channel is blocked, the airflow cannot flow according to the conventional path, and the second communication channel is opened, so that the external gas in the dust cup can be introduced into the air duct shell through the second communication channel under the influence of the instantaneous negative pressure generated in the dust cup. The external gas entering the air duct shell then impacts the filter in reverse. The reason for the generation of the instantaneous negative pressure is that when the first communication channel is cut off, the original airflow in the dust cup is still moving, causing the dust cup to be in a negative pressure state, but this negative pressure state can only last for a short time, so it can be called instantaneous negative pressure.

[0071] It can be understood that since the instantaneous negative pressure lasts for a short time, the air volume of the airflow introduced from the external air is small, which does not have a great impact on the dust in the dust cup, and the dust cup is in a negative pressure state, so the phenomenon of "dust spraying" can be avoided.

[0072] In some embodiments, the cleaning device further comprises a battery pack or a power cord, and the selection of the battery pack or the power cord is determined according to the power type and power requirement of the cleaning device, which will not be described here.

[0073] Further, the self-cleaning mechanism comprises:

[0074] A fourth valve is arranged in the first communication channel to communicate or cut off the first communication channel;

[0075] A fifth valve is arranged in the second communication channel to communicate or cut off the second communication channel;

[0076] An operating member is at least partially exposed outside the air duct shell for user operation, and the operating member can drive the fourth valve and the fifth valve to move to cut off one of the first communication channel and the second communication channel and communicate the other one.

[0077] Referring to Figures 2 to 5 In the normal working state, the fourth valve is in a position to keep the first communication channel communicated, allowing the airflow to flow from the dust cup to the motor through the filter and the first communication channel, maintaining the dust suction and dust filtering operation in the normal working state. In the self-cleaning state, the fourth valve is driven by the operating member to cut off the first communication channel and prevent the airflow from continuing to flow according to the original path. The specific structure of the fourth valve will be described below, which will not be described here.

[0078] The fifth valve is arranged in the second communication passage, and functions to control the opening and closing of the second communication passage, similar to the fourth valve. In the normal working state, the fifth valve is in a position to cut off the second communication passage to prevent external gas from entering the air duct housing. In the self-cleaning state, the fifth valve is driven by the required operating member to communicate the second communication passage, so that external gas can enter the air duct housing through the second communication passage. The specific structure of the fourth valve will be described below, and will not be described here.

[0079] The operating member is the part of the self-cleaning mechanism that directly interacts with the user, at least a part of which is exposed outside the air duct housing to facilitate user operation. The user drives the movement of the fourth valve and the fifth valve by applying a force to the operating member.

[0080] Through the arrangement of the fourth valve, the fifth valve and the operating member, the self-cleaning mechanism can flexibly switch between different working states to meet the different airflow path requirements of the cleaning device in the normal cleaning and self-cleaning modes, thereby improving the working efficiency and user experience of the entire device.

[0081] In the embodiment, a plurality of partition walls are arranged in the air duct housing to divide the space of the air duct housing into a plurality of chambers, which at least include:

[0082] The eleventh chamber is in communication with the dust cup;

[0083] The twelfth chamber is in communication with the motor inlet end, and the twelfth chamber and the eleventh chamber are in communication through a filter outlet formed on the partition wall, the filter outlet is located on the first communication passage, and the fourth valve is arranged on the filter outlet to open or close the filter outlet;

[0084] The thirteenth chamber is in communication with the eleventh chamber through a self-cleaning opening formed on the partition wall, the fifth valve is arranged on the self-cleaning opening to open or close the self-cleaning opening, and the thirteenth chamber is provided with a first air supplement port in communication with the external gas, and the first air supplement port and the self-cleaning opening are located on the second communication passage.

[0085] Continuing to refer to Figures 2 to 5The eleventh chamber is communicated with the dust cup, and in the normal working state, the airflow containing dust and sundries enters the eleventh chamber after being filtered by the filter. The twelfth chamber is communicated with the eleventh chamber through a filtering outlet on the partition wall, and is also communicated with the motor inlet end, and in the normal working state, the airflow enters the twelfth chamber from the eleventh chamber through the filtering outlet, and then flows to the motor inlet end, and is finally discharged by the motor. The fourth valve is arranged at the filtering outlet, and is used for controlling opening or closing of the filtering outlet, so as to realize communication or interruption of the first communication channel.

[0086] The thirteenth chamber is communicated with the eleventh chamber through a self-cleaning opening formed on the partition wall, and the thirteenth chamber is also provided with a first air supplement opening communicated with external gas. The communication between the first air supplement opening and the second communication channel is formed in the thirteenth chamber. The fifth valve is arranged at the self-cleaning opening, and is used for controlling opening or closing of the self-cleaning opening, so as to realize communication or interruption of the second communication channel. In the self-cleaning state, when the fifth valve opens the self-cleaning opening, external gas can enter the thirteenth chamber through the first air supplement opening under the action of the instantaneous negative pressure generated in the dust cup, and then flows to the eleventh chamber through the self-cleaning opening, and finally reversely impacts the filter.

[0087] Continuing to refer to Figure 4 and Figure 5 , as an example, in the normal working state, the flow direction of the dust filtering air duct is as shown in Figure 4 , the motor of the cleaning device is running, negative pressure is generated, and external air containing dust and sundries is sucked into the dust cup through the suction port. The airflow sucked from the dust cup enters the eleventh chamber communicated with the dust cup. The airflow from the eleventh chamber enters the twelfth chamber through the filtering outlet (located on the first communication channel). The airflow flowing out of the twelfth chamber enters the channel communicated with the motor inlet end, and is finally sucked into and discharged by the motor. It can be understood that the first communication channel is part of the dust filtering air duct.

[0088] In the self-cleaning state, the flow direction of the self-cleaning air duct is as shown in Figure 5 , the self-cleaning mechanism is actuated to interrupt the first communication channel (close the fourth valve), and at the same time, the second communication channel is communicated (the fifth valve is opened). After the external gas enters the thirteenth chamber through the first air supplement opening, it enters the eleventh chamber through the self-cleaning opening, and then reversely impacts the filter cleaning side, and removes the dust and sundries accumulated on the other side (filtering side) of the filter. It can be understood that the second communication channel is part of the self-cleaning air duct.

[0089] In the embodiment, the fourth valve and the fifth valve are rotary valves.

[0090] Specifically, refer to Figure 4 and Figure 5The fourth valve and the fifth valve are plate-shaped structures and have rotating shafts, the fourth valve has a sealing surface that seals the filter outlet, and the fifth valve has a sealing surface that seals the self-cleaning opening. The operation member is a button that has a driving portion abutting against the fourth valve and the fifth valve, and a user can press the operation member, and the fourth valve and the fifth valve receive the pressing driving of the operation member, convert the linear direction movement into the rotating direction movement, and thus open or close the corresponding opening.

[0091] Further, the twelfth chamber is further provided with a second air supplementing opening in communication with the external air, and a third communication channel is further formed in the air duct shell and sequentially communicates the second air supplementing opening, the twelfth chamber and the motor;

[0092] The self-cleaning mechanism is further used for, in the self-cleaning state, cutting off the first communication channel while communicating the third communication channel.

[0093] Referring to Figure 8 The twelfth chamber is further provided with a second air supplementing opening in communication with the external air in addition to being in communication with the motor inlet end and the eleventh chamber through the filter outlet, and the second air supplementing opening is in communication with the external air to provide another air source for the airflow in the air duct shell. In the self-cleaning state, when the first communication channel is cut off, the second air supplementing opening can provide additional air for the motor to ensure the stable operation of the motor. Through the second air supplementing opening, the external air can directly enter the twelfth chamber and flow to the motor, avoiding the motor overload phenomenon caused by insufficient air due to the cutting off of the first communication channel, and ensuring the safety and reliability of the motor.

[0094] Further, the plurality of chambers further comprises:

[0095] The fourteenth chamber is in communication with the motor outlet end, and the motor outlet end is in communication with the external air through an air outlet provided on the fourteenth chamber.

[0096] In addition to the above-mentioned eleventh chamber, twelfth chamber and thirteenth chamber, the plurality of chambers further comprises a fourteenth chamber. The fourteenth chamber is in communication with the motor outlet end, and the motor will discharge air when operating. The fourteenth chamber serves as a communication space for the motor outlet end to receive and guide the airflow discharged by the motor to be discharged to the outside of the air duct shell. The fourteenth chamber is provided with an air outlet, which is the air outlet of the air duct shell.

[0097] In the embodiment, the airflow from the motor outlet end to the fourteenth chamber is substantially parallel to the airflow from the twelfth chamber to the motor inlet end and is in opposite directions.

[0098] Further, referring to Figure 7The fourteenth chamber is two in number and symmetrically arranged on both sides of the twelfth chamber. Correspondingly, the two fourteenth chambers are each provided with an air outlet.

[0099] In some embodiments, the cleaning device further comprises an outer housing, the air duct housing is at least partially arranged in the outer housing, the outer housing has an air exhaust port, the air outlet is in communication with the air exhaust port; the self-cleaning mechanism is at least partially exposed to the outer housing for user operation.

[0100] The air duct housing is a key component in the cleaning device for guiding and controlling air flow. Arranging it at least partially in the outer housing can achieve protection and integration of the air duct housing, making the structure of the entire cleaning device more compact and aesthetic. The outer housing provides additional protection for the air duct housing, preventing damage to the air duct housing and its internal components from the external environment. The air outlet is in communication with the air exhaust port of the outer housing, ensuring the smoothness of air flow when it is discharged from the cleaning device, and optimizing the final path of air flow in the normal working state. The self-cleaning mechanism is partially exposed to the outer housing, allowing users to easily access the operating element and trigger the self-cleaning function.

[0101] In this embodiment, the air duct housing has a columnar structure as a whole, and the multiple partition walls include:

[0102] The seventh partition wall extends in the horizontal direction to form the eleventh chamber together with the side wall of the housing body, and the filter outlet is formed on the seventh partition wall;

[0103] The eighth partition wall extends upward from the seventh partition wall and surrounds the filter outlet and the motor inlet end;

[0104] The ninth partition wall extends upward from the seventh partition wall and surrounds the self-cleaning opening and the first air supplement port;

[0105] In the extension direction of the seventh partition wall, the eighth partition wall and the ninth partition wall jointly divide to form the twelfth chamber, the thirteenth chamber and the fourteenth chamber.

[0106] Referring to Figures 3 to 5, the overall shape of the air duct shell is columnar, and has a side wall. The seventh partition wall is one of the multiple partition walls, and extends in a horizontal direction, and generally divides the internal space of the air duct shell into upper and lower portions, with the lower portion forming an eleventh chamber. An eighth partition wall extends upward from the seventh partition wall and surrounds the filter outlet and the motor inlet end, thereby achieving spatial surrounding and isolation of the filter outlet and the motor inlet end, and forming a relatively independent area, i.e., a twelfth chamber. The upper portion of the air duct shell, excluding the twelfth chamber, is further divided by a ninth partition wall into a thirteenth chamber and a fourteenth chamber. In this way, the various chambers are separated, thereby achieving airflow management and function switching of the cleaning device in different working states.

[0107] Further, the air duct shell comprises:

[0108] a shell body, the shell body being columnar in overall shape, the multiple partition walls being arranged in the shell body, and the air outlet and the first air supplementing port being arranged on the side wall of the columnar structure;

[0109] a shell upper cover, the shell upper cover being arranged on the shell body;

[0110] The twelfth chamber is further provided with a second air supplementing port in communication with the external gas, and the second air supplementing port is arranged on the shell upper cover.

[0111] Referring to Figure 3 and Figure 8 , the shell body is the main part of the air duct shell, and is columnar in overall shape. The columnar structure of the shell body provides a basic framework for the various chambers and partition walls inside. The shell upper cover is another important component of the air duct shell, and is arranged on the shell body to close and protect the internal structure. Correspondingly, the second air supplementing port is arranged on the shell upper cover.

[0112] In addition, arranging the air outlet and the first air supplementing port on the side wall of the columnar structure can make the airflow enter and exit the air duct shell in a more natural and smooth manner. Compared with arranging the openings on the end of the air duct shell, the side wall openings can avoid excessive turbulence and vortex of the airflow when entering and exiting, and improve the stability and flowability of the airflow.

[0113] In the present embodiment, the air duct shell has a first opening in airflow communication with the filter, a second opening in airflow communication with the motor, and a third opening, and the self-cleaning mechanism is at least partially exposed from the third opening to provide user operation.

[0114] The air duct shell has two end faces, the third opening is located at a first end face, the first opening is located at a second end face, and the side face is connected between the first end face and the second end face.

[0115] It can be understood that the air duct shell has a columnar structure with two end faces, i.e., two opposite faces of the columnar structure, wherein the first opening is located at one of the end faces and the third opening is located at the other end face. The side face of the air duct shell refers to the part connecting the first end face and the second end face, which constitutes the peripheral surface of the air duct shell, and the side face itself also participates in the guidance and channeling of the airflow.

[0116] The first opening of the end face of the air duct shell is in airflow communication with the dust cup or the filter, and the second opening of the side face is in airflow communication with the motor, the turning angle of the airflow is small, the path is more reasonable, the space of the air duct shell is further compressed, the overall structure is more compact, and at the same time, the path of the dust cup and the motor is shortened, so that the airflow path is more direct. The self-cleaning mechanism at least partially exposes from the third opening, which is convenient for user operation and realizes the quick switching of the cleaning device between the normal working state and the self-cleaning state. At the same time, the arrangement of the first opening, the second opening and the third opening is also conducive to the compact design of the entire cleaning device and saves space.

[0117] Further, the air duct shell, the filter and the dust cup are arranged in the direction of the first axis, and the first axis is perpendicular to the axis of the motor.

[0118] Generally, the filter is arranged in the dust cup, and the first axis can be the mounting axis of the filter, i.e., the center line of the dust cup and the filter, or the central axis of the dust cup, which is not limited here. The axis of the motor can be understood as the rotation axis of the motor shaft.

[0119] The first axis and the axis of the motor are perpendicular to each other, so that the mounting direction of the motor forms a right angle with the arrangement direction of the air duct shell and other components, which is helpful for reasonable use of space, optimization of the volume and shape of the entire cleaning device, and at the same time, is also conducive to the conversion and flow of the airflow between different components.

[0120] 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 manner of the specification is only for the sake of clarity, and 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 can be understood by those skilled in the art.

[0121] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit it, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions 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, through which air flows in a forward direction in the normal working state, and through which air flows in a reverse direction at least partially in the self-cleaning state; a motor for generating negative pressure to form the air flow; a dust cup for collecting dirt; the filter is arranged in the dust cup; characterized in that the cleaning device further comprises: an air duct housing, which is located between the filter and the motor, and in which a first communication passage is formed to communicate the dust cup and the motor, and a second communication passage is formed to communicate ambient air and the dust cup; at least part of the self-cleaning mechanism is arranged in the air duct housing, and the self-cleaning mechanism is configured to, in the self-cleaning state, cut off the first communication passage while communicating the second communication passage, so that the ambient air is affected by the instantaneous negative pressure generated in the dust cup to enter the air duct housing and impact the filter in a reverse direction.

2. The cleaning device of claim 1, wherein, the self-cleaning mechanism comprises: a fourth valve arranged in the first communication passage to communicate or cut off the first communication passage; a fifth valve arranged in the second communication passage to communicate or cut off the second communication passage; an operating member, at least part of which is exposed outside the air duct housing for being operated by the user, and the operating member is configured to drive the fourth valve and the fifth valve to move to cut off one of the first communication passage and the second communication passage, and to communicate the other one.

3. The cleaning device of claim 2, wherein, a plurality of partition walls are arranged in the air duct housing to divide the space of the air duct housing into a plurality of chambers, the plurality of chambers at least comprising: an eleventh chamber communicating with the dust cup; a twelfth chamber communicating with a motor inlet end, the twelfth chamber and the eleventh chamber being communicated through a filter outlet formed on the partition wall, the filter outlet being located on the first communication passage, and the fourth valve being arranged on the filter outlet to open or close the filter outlet; a thirteenth chamber communicating with the eleventh chamber through a self-cleaning opening formed on the partition wall, the fifth valve being arranged on the self-cleaning opening to open or close the self-cleaning opening, and the thirteenth chamber being provided with a first air supplement opening communicating with the ambient air, the first air supplement opening and the self-cleaning opening being located on the second communication passage.

4. The cleaning device of claim 3, wherein, the twelfth chamber is further provided with a second air supplement opening communicating with the ambient air, and a third communication passage is further formed in the air duct housing, the third communication passage sequentially communicating the second air supplement opening, the twelfth chamber and the motor; the self-cleaning mechanism is further configured to, in the self-cleaning state, cut off the first communication passage while communicating the third communication passage.

5. The cleaning device of claim 4, wherein, The fourth valve is in the form of a plate, the second air supplementing port and the filtering outlet are respectively located on two sides of the fourth valve, and the fourth valve can be driven to close one of the second air supplementing port and the filtering outlet and open the other.

6. The cleaning device of claim 3, wherein, The plurality of chambers further comprises: A fourteenth chamber in communication with a motor outlet end, the fourteenth chamber being provided with an air outlet, the motor outlet end being in communication with the external gas through the air outlet.

7. The cleaning device of claim 6, wherein, The air duct shell is in the form of a columnar structure, and the plurality of partition walls comprises: A seventh partition wall extending in a horizontal direction to jointly define the eleventh chamber with a side wall of the shell body, the filtering outlet being formed on the seventh partition wall; An eighth partition wall extending upward from the seventh partition wall and surrounding the filtering outlet and the motor inlet end; A ninth partition wall extending upward from the seventh partition wall and surrounding the self-cleaning opening and the first air supplementing port; The eighth partition wall and the ninth partition wall jointly partition the twelfth chamber, the thirteenth chamber and the fourteenth chamber in the extending direction of the seventh partition wall.

8. The cleaning device of claim 7, wherein, The air duct shell comprises: A shell body in the form of the columnar structure, the plurality of partition walls being arranged in the shell body, the air outlet and the first air supplementing port being arranged on a side wall of the columnar structure; A shell upper cover arranged on the shell body; The twelfth chamber is further provided with a second air supplementing port in communication with the external gas, the second air supplementing port being arranged on the shell upper cover.

9. The cleaning device of claim 1, wherein, The air duct shell has a first opening in airflow communication with the filter, a second opening in airflow communication with the motor and a third opening, the self-cleaning mechanism being at least partially exposed from the third opening to provide user operation; The air duct shell has two end faces, the third opening being located on a first end face, the first opening being located on a second end face, and a side face being connected between the first end face and the second end face.

10. The cleaning device of claim 1, wherein, The air duct shell, the filter and the dust cup are arranged in the direction of a first axis, the first axis being perpendicular to an axis of the motor. The fourth valve is in the form of a plate, the second air supplementing port and the filtering outlet are respectively located on two sides of the fourth valve, and the fourth valve can be driven to close one of the second air supplementing port and the filtering outlet and open the other.

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