Negative pressure suction device and cleaning equipment

Abstract

The invention relates to a negative pressure suction device and cleaning equipment. The negative pressure suction device comprises a machine body; the motor is installed in the machine body, the motor is provided with an air inlet and an air outlet which are located in an airflow path, and the airflow path is a path where airflow flows through the negative pressure suction device; the dust cup module is detachably connected to the end, close to the air inlet, of the machine body; the dust cup module comprises a dust cup and a filtering assembly, the dust cup is provided with a containing cavity, the filtering assembly is installed in the containing cavity, the filtering assembly comprises an air inlet filter and an air outlet filter which are both located on the airflow path and integrally arranged, on the airflow path, the air inlet filter is located on the upstream of the air inlet, and on the airflow path, the air outlet filter is located on the downstream of the air outlet. And the air outlet filter is positioned at the downstream of the air outlet. According to the negative pressure suction device, the air inlet filter and the air outlet filter are integrated and can be integrally disassembled and assembled when cleaning is needed, and the disassembly and assembly operation can be simplified.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a negative pressure suction device and a cleaning device. Background Art

[0002] As people's living standards continue to improve, vacuum cleaners have gradually entered thousands of households, bringing great convenience to people's lives. Usually, vacuum cleaners include an air inlet filter and an air outlet filter. The air inlet filter filters the air flow from the dust cup to the air inlet of the motor, so that the dust particles remain in the dust cup and the clean air flows into the air inlet of the motor; the air outlet filter filters the air flow discharged from the air outlet of the motor to ensure the cleanliness of the air flow to the outside. However, both the air inlet filter and the air outlet filter are components that need to be cleaned frequently, and it is troublesome to disassemble and assemble them each time. Summary of the invention

[0003] Based on this, it is necessary to provide a negative pressure suction device, which can disassemble the air inlet filter and the air outlet filter as a whole when cleaning is needed, thereby simplifying the disassembly and assembly operation.

[0004] A negative pressure suction device, comprising:

[0005] body;

[0006] a motor installed in the body, the motor having an air inlet and an air outlet located on an airflow path, the airflow path being a path of airflow passing through the negative pressure suction device; and

[0007] A dust cup module is detachably connected to one end of the body near the air inlet;

[0008] The dust cup module includes a dust cup and a filter assembly, the dust cup has a storage cavity, the filter assembly is installed in the storage cavity, the filter assembly includes an air inlet filter and an air outlet filter, both of which are located on the air flow path and are integrally arranged, and on the air flow path, the air inlet filter is located upstream of the air inlet, and the air outlet filter is located downstream of the air outlet.

[0009] In one embodiment, the filter assembly includes a bracket, and the air inlet filter and the air outlet filter are both installed on the bracket; the dust cup has an air flow inlet for air to flow into the negative pressure suction device, and an air flow outlet for air to flow out of the negative pressure suction device, and the bracket divides the storage chamber into a first space and a second space, the first space is connected to the air flow inlet and the air inlet, and the second space is connected to the air flow outlet and the air outlet, the air inlet filter is located in the first space, and the air outlet filter is located in the second space.

[0010] In one embodiment, the air flow path includes an air inlet path and an air outlet path, the air inlet path is the path of the air flow from the air flow inlet to the air inlet, and the air outlet path is the path of the air flow from the air outlet to the outside, and the air inlet path and the air outlet path are in opposite directions in at least some areas.

[0011] In one embodiment, the negative pressure suction device has a handle, and the air flow outlet is arranged on the side wall of the dust cup and radially along the rotor shaft of the motor. The air flow outlet is located on the side away from the handle, and along the axial direction of the rotor shaft of the motor, the air flow outlet is spaced from the handle.

[0012] In one embodiment, the bracket includes a partition connected to the cavity wall of the storage cavity, and a sleeve extending from the partition toward the air inlet, the sleeve is connected to the air inlet at one end facing away from the partition, the partition is provided with a through hole penetrating the partition and connected to the sleeve, the inner wall of the sleeve, the end of the partition facing away from the air inlet, and the cavity wall of the storage cavity constitute the first space, and the outer wall of the sleeve, the end of the partition close to the air inlet, and the cavity wall of the storage cavity constitute the second space.

[0013] In one embodiment, the air inlet filter is filter cotton, the filter cotton is installed in the through hole, the end of the partition away from the sleeve is connected to a cyclone filter, and the air outlet filter is sleeved on the outside of the sleeve.

[0014] In one of the embodiments, the air inlet filter is an air inlet HEPA, the air inlet HEPA is connected to the end of the partition away from the sleeve, and the air outlet filter is sleeved on the outside of the sleeve.

[0015] In one embodiment, the air outlet filter is an annular filter cotton sleeved on the outside of the sleeve.

[0016] In one embodiment, the annular filter cotton is configured to absorb fragrance factors.

[0017] In one embodiment, the filter assembly includes a limit member that is spaced apart and sleeved on the outside of the sleeve, the limit member is sealingly connected to the end of the fuselage along the first direction close to the air inlet, the limit member is annular and has a hollow side wall, the annular filter cotton is stuck between the limit member and the sleeve, and the first direction is the axial direction of the rotor shaft of the motor.

[0018] In one of the embodiments, there is a gap between the motor and the side wall of the fuselage, and sound-absorbing cotton is arranged in the gap. The airflow flowing out of the air outlet passes through the sound-absorbing cotton and the annular filter cotton in sequence to reach the airflow outlet.

[0019] In one embodiment, the air inlet and the air outlet are respectively arranged at two ends of the motor along the first direction.

[0020] In one embodiment, a support frame is provided in the fuselage, and the support frame is supported between the motor and the filter assembly. The airflow flowing out of the sleeve passes through the support frame and flows into the air inlet. The airflow flowing out of the air outlet passes through the silencer cotton, the support frame and the annular filter cotton in sequence to reach the airflow outlet.

[0021] In one embodiment, the support frame includes an inner ring member, an outer ring member surrounding the outer side of the inner ring member, and a connecting member connected between the inner ring member and the outer ring member, the inner ring member is hollow and plugged into the sleeve to enable fluid communication between the sleeve and the air inlet, the connecting member is hollow, and the outer ring member, the limit member and the fuselage are sealed to enable fluid communication between the silencer cotton and the annular filter cotton.

[0022] In one embodiment, an annular outer ring seal is provided between the outer ring member and the side wall of the fuselage, and the outer ring seal abuts against the limiting member.

[0023] In one of the embodiments, it also includes an inner ring seal that passes through the connecting piece and is in an annular shape, wherein one end of the inner ring seal is sealedly connected between the inner ring piece and the air inlet along the first direction, and the other end of the inner ring seal is sleeved on the outer side of the inner ring piece along the first direction and is sealedly connected to the outlet of the sleeve.

[0024] In one embodiment, the connecting member includes an annular connecting portion and a plurality of guide portions arranged at intervals along the circumference of the connecting portion, wherein the plurality of guide portions are connected between the outer wall of the connecting portion and the inner wall of the outer ring member, and in the direction from the sound-absorbing cotton to the annular filter cotton, the radial size of each of the guide portions along the connecting portion gradually decreases.

[0025] In one embodiment, the end of the sleeve facing away from the partition extends beyond the end of the air outlet filter facing away from the partition.

[0026] In one of the embodiments, the sleeve is provided with a hand-held portion protruding radially outward at one end thereof away from the partition.

[0027] In one of the embodiments, a mesh filter is installed in the first space, and in the air flow path, the mesh filter is located upstream of the air inlet filter.

[0028] In one of the embodiments, the mesh filter sleeved on the outside of the air inlet HEPA is installed at one end of the partition away from the sleeve, and the mesh filter has mesh holes connecting its external space and internal space.

[0029] In one embodiment, the inner wall of the mesh filter has the same shape as the outer wall of the air inlet HEPA and has an equal spacing therebetween.

[0030] In one embodiment, the mesh filter and the dust cup are integrally formed.

[0031] In one of the embodiments, an air inlet pipe is provided at the air flow inlet, and the angle between the central axis of the air inlet pipe at the air flow inlet and the tangent of the dust cup at the air flow inlet is less than 90 degrees.

[0032] In one embodiment, the dust cup includes a cup body, a cup cover and a cup cover seal. The cup cover is rotatably connected to one end of the cup body away from the motor. The cup cover seal is used to seal the cup body and the cup cover after the cup cover is closed.

[0033] In one embodiment, the cup lid seal is installed on the cup lid, and includes an annular side wall sealing portion and a bottom wall sealing portion. The bottom wall sealing portion is arranged on the end wall of the cup lid close to the cup body, and the side wall sealing portion extends outward from the inner circle of the bottom wall sealing portion. After the cup lid is closed, the end of the side wall sealing portion facing away from the bottom wall sealing portion abuts against the inner side wall of the cup body.

[0034] In one embodiment, the inner side wall of the cup body includes a tapered surface. After the cup cover is closed, the side wall sealing portion abuts against the tapered surface, and the diameter of the tapered surface gradually increases in a direction approaching the cup cover.

[0035] In the above-mentioned negative pressure suction device, the dust cup module is detachably connected to one end of the fuselage near the air inlet, and the filter assembly in the dust cup module is installed in the storage chamber of the dust cup. The filter assembly includes an air inlet filter and an air outlet filter. The air inlet filter is located upstream of the motor air inlet. Therefore, the air inlet filter can filter the air flow flowing toward the motor air inlet, so that dust particles and the like remain in the storage chamber, and the clean air flow enters the motor air inlet. The air outlet filter is located downstream of the motor air outlet. Therefore, the air outlet filter can filter the air flow flowing from the motor air outlet to the outside to ensure the cleanliness of the air flow flowing to the outside. Since the dust cup module is detachably connected to one end of the fuselage near the air inlet, and the air inlet filter and the air outlet filter are integrally arranged, that is, the air inlet filter and the air outlet filter are integrated into one body, then when the dust cup module is removed from the fuselage, the air inlet filter and the air outlet filter can be disassembled and assembled as a whole. Compared with disassembling and assembling the air inlet filter and the air outlet filter separately, the integrated structure of the present application can simplify the disassembly and assembly process, and the operation is more convenient and efficient.

[0036] The present application also proposes a cleaning device, comprising the above-mentioned negative pressure suction device.

[0037] In one embodiment, the cleaning device includes a floor brush assembly and a suction pipe, one end of the suction pipe is connected to the air inlet pipe of the negative pressure suction device, and the other end is connected to the floor brush assembly.

[0038] The above-mentioned cleaning equipment, by applying the above-mentioned negative pressure suction device, can simplify the disassembly and assembly process of the air inlet filter and the air outlet filter, making the operation more convenient and efficient, and can reduce fluid energy loss, improve suction efficiency, and achieve better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the structure of a negative pressure suction device in one embodiment of the present application.

[0040] Figure 2 This is a cross-sectional view of a negative pressure suction device in one embodiment of the present application (the arrow indicates the direction of air flow).

[0041] Figure 3 This is a schematic diagram of the internal structure of the dust cup module in one embodiment of the present application.

[0042] Figure 4 Schematic diagram of the structure of the filter assembly in one embodiment of the present application.

[0043] Figure 5 It is a cross-sectional view of a filter assembly in one embodiment of the present application.

[0044] Figure 6 Schematic diagram of the structure of a bracket in one embodiment of the present application.

[0045] Figure 7 It is a cross-sectional view of a bracket in one embodiment of the present application.

[0046] Figure 8 Schematic diagram of the structure of a support frame in one embodiment of the present application.

[0047] Fig. 9 This is a schematic structural diagram of an outer ring seal and an inner ring seal installed on a support frame in one embodiment of the present application.

[0048] Fig.10 for Figure 2 An enlarged view of the connection between the middle cup body and the cup lid.

[0049] Fig.11 It is a three-dimensional cross-sectional view of a negative pressure suction device in one embodiment of the present application.

[0050] Fig.12 This is an exploded view of a negative pressure suction device in one embodiment of the present application.

[0051] Fig.13 for Figure 2 A partial enlarged view of the air inlet of the middle motor.

[0052] Reference numerals:

[0053] 100, fuselage; 110, cavity; 120, silencer; 130, handle; 200, motor; 210, air inlet; 220, air outlet; 230, moving impeller; 240, fixed impeller; 250, rotor; 260, circuit board; 30, dust cup module; 300, dust cup; 310, cup body; 311, conical surface; 320, cup cover; 330, storage cavity; 331, first space; 332, second space; 333, air flow inlet; 334, air flow outlet; 400, filter assembly; 410, bracket; 411, partition; 4111, through hole; 412, sleeve; 4121, hand-held part; 413, inner convex ring; 414, outer convex ring; 420 , air inlet filter; 430, air outlet filter; 440, limiter; 441, top plate; 442, bottom plate; 443, side plate; 500, support frame; 510, inner ring; 511, inner ring side wall; 512, inner ring bottom wall; 520, outer ring; 530, connector; 531, connector; 532, guide; 610, outer ring seal; 620, inner ring seal; 621, first seal; 622, second seal; 630, cup cover seal; 631, side wall seal; 632, bottom wall seal; 633, embedded part; 710, mesh filter; 711, mesh; 720, air inlet pipe; 730, protective shell; 740, battery. DETAILED DESCRIPTION

[0054] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0055] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0056] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0060] See also Figure 1 , Figure 2 and Fig.12 The negative pressure suction device provided in one embodiment of the present application includes a body 100, a motor 200 and a dust cup module 30. The motor 200 is installed in the body 100, and the motor 200 has an air inlet 210 and an air outlet 220 both located on the air flow path. The air flow path is the path of the air flow through the negative pressure suction device. The dust cup module 30 is detachably connected to the end of the body 100 near the air inlet 210. See also Figures 3 to 6 ,as well as Fig.11 The dust cup module 30 includes a dust cup 300 and a filter assembly 400. The dust cup 300 has a storage cavity 330. The filter assembly 400 is installed in the storage cavity 330. The filter assembly 400 includes an air inlet filter 420 and an air outlet filter 430, which are both located on the air flow path and are integrally arranged. In the air flow path, the air inlet filter 420 is located upstream of the air inlet 210, and the air outlet filter 430 is located downstream of the air outlet 220.

[0061] In the above-mentioned negative pressure suction device, the air inlet filter 420 is located upstream of the air inlet 210, so the air inlet filter 420 can filter the airflow flowing toward the air inlet 210 of the motor 200, so that dust particles and the like remain in the storage chamber 330, and the clean airflow enters the air inlet 210 of the motor 200. The air outlet filter 430 is located downstream of the air outlet 220, so the air outlet filter 430 can filter the airflow flowing from the air outlet 220 of the motor 200 to the outside, so as to suppress the carbon powder generated by the wear of the brushed motor from flowing to the outside, and ensure the cleanliness of the airflow flowing to the outside, so as to prevent the human body from inhaling the carbon powder. Since the dust cup module 30 is detachably connected to one end of the body 100 near the air inlet 210, and the air inlet filter 420 and the air outlet filter 430 are integrally arranged, that is, the air inlet filter 420 and the air outlet filter 430 are integrated into one body, then when the dust cup module 30 is removed from the body 100, the air inlet filter 420 and the air outlet filter 430 can be disassembled and assembled as a whole. Compared with disassembling and assembling the air inlet filter 420 and the air outlet filter 430 separately, the integrated structure of the present application can simplify the disassembly and assembly process, and the operation is more convenient and efficient.

[0062] Specifically, the body 100 is provided with a battery 740 for supplying power to the motor 200 and other components. The body 100 is also provided with a handle 130 for the user to hold. Figure 1 and Figure 2 In the perspective shown in the figure), the first direction is the up and down direction. In the perspective of the attached figure, the dust cup module 30 is detachably connected to the bottom end of the fuselage 100. In the subsequent explanations, this orientation will be used for introduction. However, it should be noted that this is only an orientation in a common use state. In actual use, it can also be used in other orientations, for example, the entire negative pressure suction device is used at an angle close to the horizontal.

[0063] See also Figure 2 , Figure 3 , Figure 6 and Fig.11 In some embodiments, the filter assembly 400 includes a bracket 410, and the air inlet filter 420 and the air outlet filter 430 are both mounted on the bracket 410. The dust cup 300 has an air flow inlet 333 for air flow into the negative pressure suction device, and an air flow outlet 334 for air flow out of the negative pressure suction device. The bracket 410 divides the storage chamber 330 into a first space 331 and a second space 332. The first space 331 is connected to the air flow inlet 333 and the air inlet 210, and the second space 332 is connected to the air flow outlet 334 and the air outlet 220. The air inlet filter 420 is located in the first space 331, and the air outlet filter 430 is located in the second space 332.

[0064] Specifically, in this embodiment, the air inlet filter 420 and the air outlet filter 430 are both installed on the bracket 410, so that the air inlet filter 420 and the air outlet filter 430 are integrally arranged, thereby realizing the overall disassembly and assembly of the two. The airflow entrained with dust flows into the first space 331 through the airflow inlet 333, and is filtered by the air inlet filter 420 arranged in the first space 331. The dust particles and the like remain in the storage cavity 330, and the clean airflow passes through the air inlet filter 420 and enters the air inlet 210 of the motor 200. After the airflow flows out of the motor 200 from the air outlet 220, it is filtered again by the air outlet filter 430 arranged in the second space 332 to further improve the cleanliness of the airflow, and then discharged to the outside from the airflow outlet 334. Since the air flow inlet 333 and the air flow outlet 334 are both arranged at the dust cup 300, and the dust cup 300 is located at the end of the fuselage 100 close to the air inlet 210, the direction of the air flow will change when flowing in the negative pressure suction device, first flowing from the dust cup 300 to the motor 200, and then flowing from the motor 200 to the dust cup 300, forming a circuitous path, which can slow down the air flow flowing out of the air flow outlet 334 and make it softer. If it blows to the user's body, the user is less likely to feel discomfort, and it can also reduce noise.

[0065] See also Figure 2 and Fig.11 In some embodiments, the airflow path includes an inlet path and an outlet path. The inlet path is the path of the airflow from the airflow inlet 333 to the air inlet 210, and the outlet path is the path of the airflow from the air outlet 220 to the outside. The inlet path and the outlet path are opposite in direction at least in some areas. In this way, the airflow path can be extended, so that the airflow is more moderate and the noise generated is smaller.

[0066] Furthermore, in some embodiments, the air outlet 334 is disposed on the side wall of the dust cup 300, and along the radial direction of the rotor shaft of the motor 200, the air outlet 334 is located on the side away from the handle 130, and along the axial direction of the rotor shaft of the motor 200, the air outlet 334 is spaced from the handle 130. Such a configuration allows the air outlet 334 to be farther away from the handle 130, which can further reduce the impact of the airflow discharged from the air outlet 334 on the user.

[0067] In other embodiments, the air flow outlet 334 may also be disposed on the fuselage 100. For example, the air flow outlet 334 is disposed on a side wall of the fuselage 100 or an end wall away from the dust cup module 30.

[0068] See also Figure 2 and Fig.11In some embodiments, the air inlet 210 and the air outlet 220 are disposed at two ends of the motor 200 along the first direction. From the perspective of the accompanying drawings, the air inlet 210 is located at the bottom of the motor 200, and the air outlet 220 is located at the top of the motor 200. In this way, the path of the airflow flowing in the motor 200 can be made shorter, thereby reducing fluid energy loss, improving suction efficiency, and achieving better cleaning effect.

[0069] In other embodiments, the air outlet 220 may also be disposed on the side wall of the motor 200 .

[0070] See also Figure 2 and Fig.11 In some embodiments, when the airflow flows from the air inlet 210 to the air outlet 220 , heat is exchanged with components such as the impeller 230 , the stator 240 , the rotor 250 , and the circuit board 260 .

[0071] Specifically, the impeller 230 is fixedly mounted on the rotor shaft of the rotor 250, and it rotates synchronously with the rotor shaft, thereby forming suction, so that the airflow flows in from the air inlet 210. The fixed impeller 240 is fixedly mounted in the housing of the motor 200. After the airflow flows in, under the guidance of the impeller 230, it flows in a whirlwind shape toward the surroundings, and at the same time flows toward the air outlet 220. In this process, the airflow exchanges heat with the impeller 230 and takes away the heat of the impeller 230. Then, under the guidance of the fixed impeller 240, the airflow continues to rotate and flow toward the air outlet 220. In this process, the airflow exchanges heat with the fixed impeller 240 and takes away the heat of the fixed impeller 240. After that, the airflow reaches the air outlet 220, and when it flows out from the air outlet 220, it will contact the circuit board 260 and take away the heat of the circuit board 260. In this way, the airflow can dissipate heat from many components inside the motor 200 when it flows through the inside of the motor 200, so as to prevent it from malfunctioning due to overheating.

[0072] See also Figure 2 , Figures 4 to 6 ,as well as Fig.11 In some embodiments, the bracket 410 includes a partition 411 connected to the cavity wall of the storage cavity 330, and a sleeve 412 extending from the partition 411 toward the air inlet 210, the sleeve 412 is connected to the air inlet 210 at one end facing away from the partition 411, and the partition 411 is provided with a through hole 4111 that passes through itself and is connected to the sleeve 412, the inner wall of the sleeve 412, the end of the partition 411 facing away from the air inlet 210, and the cavity wall of the storage cavity 330 construct a first space 331, and the outer wall of the sleeve 412, the end of the partition 411 close to the air inlet 210, and the cavity wall of the storage cavity 330 construct a second space 332.

[0073] Specifically, the plate surface of the partition 411 is perpendicular to the first direction, and the through hole 4111 passes through the central area of ​​the partition 411 along the first direction. From the perspective of the attached figure, the sleeve 412 extends upward from the top opening of the through hole 4111. The side wall of the partition 411 is connected to the cavity wall of the storage cavity 330 in a circle to separate the cavity wall of the storage cavity 330 into two parts, upper and lower. The inner wall of the sleeve 412, the bottom end of the partition 411, and the area on the cavity wall of the storage cavity 330 located below the partition 411 jointly construct the first space 331. The outer wall of the sleeve 412, the top end of the partition 411, and the area on the cavity wall of the storage cavity 330 located above the partition 411 jointly construct the second space 332. In this embodiment, the aforementioned first space 331 and second space 332 are formed by the separation of the partition 411 and the sleeve 412, so that airflow will not flow directly in the two spaces, ensuring that the airflow flows according to the preset flow path.

[0074] See also Figure 2 , Figures 4 to 6 ,as well as Fig.11 In some embodiments, the air inlet filter 420 is an air inlet HEPA, which is connected to the end of the partition 411 away from the sleeve 412, and the air outlet filter 430 is sleeved on the outside of the sleeve 412.

[0075] Specifically, the end of the partition 411 away from the sleeve 412 is connected with an inner convex ring 413 and an outer convex ring 414, both of which are annular and coaxial, and the outer convex ring 414 is arranged at intervals on the outside of the inner convex ring 413. The air inlet filter 420 (air inlet HEPA) is inserted between the inner convex ring 413 and the outer convex ring 414, and is fixedly connected to the inner convex ring 413, the outer convex ring 414, and the partition 411. The inner convex ring 413 is located outside the through hole 4111, so the air inlet filter 420 covers the range of the through hole 4111, so that the airflow flowing into the first space 331 from the air flow inlet 333 can only reach the through hole 4111 after being filtered by the air inlet filter 420, and cannot flow directly to the through hole 4111, thereby ensuring a better filtering effect.

[0076] Alternatively, in other embodiments, the air inlet filter 420 is filter cotton, which is installed in the through hole 4111 , and a cyclone filter is connected to one end of the partition 411 away from the sleeve 412 , and the air outlet filter 430 is sleeved on the outside of the sleeve 412 .

[0077] Specifically, the filter cotton is fixedly installed on the hole wall of the through hole 4111, blocking the through hole 4111 so that the airflow flowing through the through hole 4111 can only pass through the filter cotton to reach the sleeve 412 to ensure a better filtering effect. This embodiment is equivalent to replacing the air inlet HEPA with a cyclone filter on the basis of the previous embodiment. The cyclone filter mainly uses the rotation of the airflow when it flows through it to centrifuge dust particles, etc., so that they are thrown out and fall into the storage chamber 330, and the clean airflow flows into the through hole 4111. The cyclone filter can use the structure of the existing technology, which will not be repeated here.

[0078] See also Figure 2 , Figures 4 to 5 ,as well as Fig.11 In some embodiments, the air outlet filter 430 is an annular filter cotton sleeved on the outside of the sleeve 412. The airflow from the air outlet 220 passes through the annular filter cotton, which blocks and absorbs dust particles in the airflow, further improving the cleanliness of the airflow flowing to the airflow outlet 334.

[0079] Preferably, in some embodiments, the annular filter cotton is adsorbed with a fragrance factor, so that the airflow flowing out through the airflow outlet 334 has a fragrance to add fragrance to the room. Specifically, the fragrance factor can be in the form of fragrance cream or fragrance liquid.

[0080] See also Figures 2 to 5 ,as well as Fig.11 In some embodiments, the filter assembly 400 includes a limit member 440 that is spaced apart and sleeved outside the sleeve 412. The limit member 440 is sealed and connected to the end of the fuselage 100 close to the air inlet 210 along the first direction. The limit member 440 is annular and has a hollow side wall. The air outlet filter 430 (annular filter cotton) is stuck between the limit member 440 and the sleeve 412.

[0081] Specifically, the stopper 440 includes a top plate 441, a bottom plate 442 and a side plate 443, all of which are in an annular shape coaxial with the sleeve 412, the top plate 441 is connected to one end of the side plate 443, the bottom plate 442 is connected to the other end of the side plate 443, and the bottom plate 442 is connected to one end of the partition 411 close to the sleeve 412. The annular filter cotton is stuck between the side plate 443 and the sleeve 412. The side plate 443 is hollow. From the perspective of the attached figure, the airflow flowing out of the air outlet 220 passes through the annular filter cotton downward, flows out from the outside of the annular filter cotton, flows through the hollow holes on the side plate 443, and reaches the airflow outlet 334. In this embodiment, the annular filter cotton is fixedly installed by cooperating with the limit member 440 and the sleeve 412, which can make the replacement operation of the annular filter cotton more convenient. The installation can be completed by simply inserting the annular filter cotton between the limit member 440 and the sleeve 412. When removing, the annular filter cotton can be pulled out with force.

[0082] In other embodiments, the limiting member 440 may not be provided, and the annular filter cotton may be directly fixed on the outer peripheral surface of the sleeve 412 .

[0083] See also Figure 2 and Fig.11 In some embodiments, there is a gap between the motor 200 and the side wall of the body 100 , and a silencer 120 is provided in the gap. The airflow flowing out of the air outlet 220 passes through the silencer 120 and the annular filter cotton in sequence to reach the airflow outlet 334 .

[0084] Specifically, the body 100 has a cavity 110 inside, the motor 200 is installed in the cavity 110, and there is a gap between the motor 200 and the side wall of the cavity 110, and a ring-shaped sound-absorbing cotton 120 is inserted into the gap. From the perspective of the attached figure, the airflow flowing upward from the air outlet 220 will turn, flow back downward from the gap between the motor 200 and the body 100, flow through the sound-absorbing cotton 120, reach the upper end of the air outlet filter 430 (ring-shaped filter cotton), pass through the ring-shaped filter cotton downward, flow out from the outside of the ring-shaped filter cotton, flow through the hollow holes on the side plate 443, and reach the airflow outlet 334. In this embodiment, by providing the sound-absorbing cotton 120, the airflow is filtered twice by the sound-absorbing cotton 120 and the ring-shaped filter cotton to optimize the filtering effect of the airflow and further improve the cleanliness of the airflow flowing to the airflow outlet 334. In addition, the sound-absorbing cotton 120 can also absorb the vibration energy of the motor and reduce the noise generated by its vibration.

[0085] See also Figure 2 , Figure 8 , Fig. 9 and Fig.11 In some embodiments, a support frame 500 is provided in the fuselage 100, and the support frame 500 is supported between the motor 200 and the filter assembly 400. The airflow flowing out of the sleeve 412 passes through the support frame 500 and flows into the air inlet 210, and the airflow flowing out of the air outlet 220 passes through the silencer cotton 120, the support frame 500 and the annular filter cotton in sequence to reach the airflow outlet 334.

[0086] From the perspective of the attached figure, the support frame 500 is arranged at the lower end of the motor 200. The top outlet of the sleeve 412 is connected to the air inlet 210 through the support frame 500, so that the airflow flowing out of the top outlet of the sleeve 412 passes through the support frame 500 and flows into the air inlet 210. In addition, the airflow communication between the silencer cotton 120 and the air outlet filter 430 (annular filter cotton) is also achieved through the support frame 500. Of course, the position where the airflow passes through the support frame 500 upward (when flowing toward the air inlet 210) and the position where the airflow passes through the support frame 500 downward (when flowing toward the annular filter cotton) are distributed in different areas on the support frame 500, and the two airflows will not interfere with each other. In this embodiment, by setting the support frame 500, not only the separation of the two airflows is achieved so that the two will not interfere with each other, but also the motor 200 can be supported to improve the structural stability.

[0087] Of course, in other embodiments, the support frame 500 may be omitted, and the length of the sleeve 412 may be increased so that the sleeve 412 directly extends into the air inlet 210 and is sealed to the air inlet 210. In this way, the two airflows can be separated by the sleeve 412.

[0088] See also Figure 2 , Figure 8 , Fig. 9 and Fig.11 In some embodiments, the support frame 500 includes an inner ring member 510, an outer ring member 520 surrounding the outer side of the inner ring member 510, and a connecting member 530 connected between the inner ring member 510 and the outer ring member 520. The inner ring member 510 is hollow and plugged with the sleeve 412 to enable fluid communication between the sleeve 412 and the air inlet 210. The connecting member 530 is hollow, and the outer ring member 520, the limit member 440 and the fuselage 100 are sealed to enable fluid communication between the sound-absorbing cotton 120 and the annular filter cotton.

[0089] Specifically, the inner ring member 510, the outer ring member 520 and the connecting member 530 are all annular in shape as a whole. The inner ring member 510 includes an inner ring side wall 511 and an inner ring bottom wall 512, both of which are hollowed out. The inner ring side wall 511 is annular, and the inner ring bottom wall 512 is connected to the bottom end of the inner ring side wall 511. The inner ring member 510 is inserted into the sleeve 412. Since the inner ring side wall 511 and the inner ring bottom wall 512 are both hollowed out, the airflow flowing out of the sleeve 412 will pass through the hollow holes on the inner ring bottom wall 512, flow into the space enclosed by the inner ring side wall 511, and flow into the air inlet 210 from the top opening of the inner ring side wall 511. In other embodiments, the inner ring side wall 511 can also be removed, and only the inner ring side wall 511 is set, which is equivalent to extending the sleeve 412 upward. On this basis, the sleeve 412 can be inserted into the inner ring side wall 511.

[0090] The connecting piece 530 is hollow, and the bottom end of the outer ring piece 520, the top end of the limiting piece 440 and the bottom end of the fuselage 100 are sealed and connected. Therefore, the airflow flowing out from the silencer cotton 120 can only flow through the air outlet filter 430 (annular filter cotton) and then through the hollow hole on the side panel 443 to reach the airflow outlet 334 after passing downward through the hollow hole on the connecting piece 530, and will not flow out directly from the gap between the bottom end of the outer ring piece 520, the top end of the limiting piece 440 and the bottom end of the fuselage 100, thereby ensuring a better filtering effect.

[0091] See also Figure 2 , Figure 8 , Fig. 9 , Fig.11 and Fig.13 In some embodiments, an annular outer ring seal 610 is provided between the outer ring 520 and the side wall of the fuselage 100 , and the outer ring seal 610 abuts against the limiting member 440 .

[0092] Specifically, the top end of the outer ring seal 610 is inserted between the outer wall of the outer ring 520 and the side wall of the cavity 110, and the bottom end abuts against the top plate 441 of the limit member 440, thereby achieving sealing between the bottom end of the outer ring 520, the top end of the limit member 440 and the bottom end of the fuselage 100.

[0093] See also Figure 2 , Figure 8 , Fig. 9 , Fig.11 and Fig.13 In some embodiments, it also includes an inner ring seal 620 that passes through the connecting piece 530 and is in an annular shape. One end of the inner ring seal 620 is sealed and connected between the inner ring piece 510 and the air inlet 210 along the first direction, and the other end of the inner ring seal 620 is sleeved on the outer side of the inner ring piece 510 along the first direction and is sealed and connected to the outlet of the sleeve 412.

[0094] Specifically, the inner ring seal 620 includes a first sealing portion 621 extending above the connector 530, and a second sealing portion 622 extending below the connector 530. The first sealing portion 621 is sealed and connected between the inner ring 510 and the air inlet 210; the second sealing portion 622 is sleeved on the outer side of the inner ring 510 and is sealed and connected to the outlet of the sleeve 412. The first sealing portion 621 abuts against the area on the bottom end surface of the motor 200 located outside the air inlet 210, as well as the top of the inner ring 510 and the connector 530, so as to seal between the top of the inner ring 510 and the air inlet 210. The first sealing portion 621 can make the airflow passing through the inner ring 510 only flow into the air inlet 210, and will not flow directly from the gap between the top of the inner ring 510 and the air inlet 210 to the second space 332, so as to ensure that the airflow can flow through the motor 200 for heat dissipation, and the heat dissipation effect will be better. The second sealing portion 622 is in an outwardly turned shape and abuts against the top of the sleeve 412 to seal the sleeve 412 outlet and the bottom of the inner ring 510. The second sealing portion 622 allows the airflow from the sleeve 412 to flow to the air inlet 210 through the inner ring 510 instead of directly flowing to the second space 332 from the gap between the sleeve 412 and the inner ring 510, so as to ensure that the airflow can flow through the inside of the motor 200 for heat dissipation, and the heat dissipation effect will be better.

[0095] See also Figure 2 , Figure 8 , Fig. 9 , Fig.11 and Fig.13 In some embodiments, the connecting member 530 includes an annular connecting portion 531 and a plurality of guide portions 532 arranged at intervals along the circumference of the connecting portion 531. The plurality of guide portions 532 are connected between the outer wall of the connecting portion 531 and the inner wall of the outer ring member 520. In the direction from the sound-absorbing cotton 120 to the annular filter cotton, the radial size of each guide portion 532 along the connecting portion 531 gradually decreases.

[0096] From the perspective of the accompanying drawings, the inner end of the connecting portion 531 is connected to the top of the inner ring 510, and the outer end of the connecting portion 531 is higher than the inner end, so that the connecting portion 531 is tilted annular as a whole. The tops of the multiple guides 532 are connected to the outer wall of the top of the connecting portion 531, and the bottoms are connected to the inner wall of the outer ring 520. And in the direction from top to bottom, the inner end face of each guide 532 is gradually inclined away from the inner ring 510, so that the radial size of the guide 532 along the connecting portion 531 gradually decreases. A hollow hole is formed between the adjacent guides 532 and the connecting portion 531 for the airflow to pass downward. In this embodiment, the inner end face of the guide 532 is tilted as described above, so that the airflow passing through the connecting portion 531 can be guided so that it gradually flows downward and outward, thereby flowing out from the outside of the annular filter cotton more efficiently.

[0097] See also Figures 2 to 4 ,as well as Fig.11 In some embodiments, one end of the sleeve 412 facing away from the partition 411 extends beyond one end of the air outlet filter 430 facing away from the partition 411 .

[0098] From the perspective of the attached figure, the top of the sleeve 412 extends upward to above the top of the air outlet filter 430. In this way, when the filter assembly 400 is removed from the storage chamber 330 as a whole, the user only needs to hold the exposed area at the top of the sleeve 412 and pull it upward, which is convenient to operate. In addition, since the sleeve 412 is located in the second space 332, when the airflow flows through the outer wall of the sleeve 412, the cleanliness is relatively high and it is not easy to contaminate the outer wall of the sleeve 412, so it is not easy to get your hands dirty when you take it directly by hand.

[0099] See also Figure 3 and Figure 6 Preferably, in some embodiments, the sleeve 412 is provided with a hand-held portion 4121 protruding outward along its radial direction at one end away from the partition 411. In this way, the user can hold the hand-held portion 4121 to disassemble and assemble the filter assembly 400 without slipping, and the operation is more convenient.

[0100] See also Figure 2 and Fig.11 In some embodiments, a mesh filter 710 is installed in the first space 331, and in the airflow path, the mesh filter 710 is located upstream of the air inlet filter 420. Therefore, the airflow flowing into the first space 331 from the airflow inlet 333 will first be filtered by the mesh filter 710, and then filtered by the air inlet filter 420 (air inlet HEPA), and the filtering effect will be better.

[0101] See also Figure 2 and Fig.11 Furthermore, in some embodiments, a mesh filter 710 is installed on the end of the partition 411 away from the sleeve 412 and is sleeved on the outside of the air inlet filter 420 (air inlet HEPA), and the mesh filter 710 has mesh holes 711 that connect its external space and internal space.

[0102] From the perspective of the attached figure, a mesh filter 710 is provided at the bottom end of the partition 411, and the mesh filter 710 is fixedly mounted on the side wall of the storage cavity 330. The mesh filter 710 is covered outside the air inlet hepa, so the airflow flowing into the first space 331 from the air inlet 333 can only pass through the mesh 711 on the mesh filter 710 to reach the air inlet hepa. In this way, larger particles can be initially filtered through the mesh 711, and smaller particles can be filtered again through the air inlet hepa. Through double filtering, the filtering effect can be further optimized.

[0103] See also Figure 2and Fig.11 In some embodiments, the inner wall of the mesh filter 710 has the same shape and equal spacing as the outer wall of the air inlet HEPA.

[0104] Specifically, both the mesh filter 710 and the air inlet hepa are in the shape of a cone that is larger at the top and smaller at the bottom. The airflow filtered by the mesh filter 710 flows into the space between the mesh filter 710 and the air inlet hepa, and then passes through the air inlet hepa inward. When the inner wall of the mesh filter 710 and the outer wall of the air inlet hepa have the same shape and equal spacing, the space between the two can be made more uniform, and the airflow flowing into the space is more evenly distributed, so that the air pressure of the airflow flowing to the air inlet hepa from all parts of the space is more uniform, and the filtering effect is better.

[0105] See also Figure 2 and Fig.11 In some embodiments, the mesh filter 710 is integrally formed with the dust cup 300. In this way, the assembly process can be simplified.

[0106] Alternatively, in other embodiments, the mesh filter 710 and the dust cup 300 may be manufactured separately and then assembled together.

[0107] See also Figures 1 to 3 ,as well as Fig.11 In some embodiments, an air inlet pipe 720 is provided at the air flow inlet 333, and the angle between the central axis of the air inlet pipe 720 at the air flow inlet 333 and the tangent of the dust cup 300 at the air flow inlet 333 is less than 90 degrees.

[0108] Specifically, the outlet of the air inlet pipe 720 is also the air flow inlet 333. The dust cup 300 is in the shape of a hollow cylinder. The angle between the central axis of the air inlet pipe 720 at the air flow inlet 333 and the tangent of the dust cup 300 at the air flow inlet 333 is less than 90 degrees, that is, the outlet end of the air inlet pipe 720 is not perpendicular to the outer peripheral surface of the dust cup 300. In this way, the airflow flowing from the air inlet pipe 720 to the air flow inlet 333 will have a velocity component along the tangent direction of the dust cup 300, and after entering the storage chamber 330, it can flow toward the mesh filter 710 while rotating, and under the action of centrifugal force, it helps to centrifugally separate the dust particles, and the separation effect is better.

[0109] Of course, in other embodiments, the outlet end of the air inlet pipe 720 may be perpendicular to the outer circumferential surface of the dust cup 300 .

[0110] See also Figure 2 , Figure 3 , Fig.10 and Fig.11In some embodiments, the dust cup 300 includes a cup body 310, a cup cover 320 and a cup cover seal 630. The cup cover 320 is rotatably connected to the end of the cup body 310 away from the motor 200. The cup cover seal 630 is used to seal the cup body 310 and the cup cover 320 after the cup cover 320 is closed.

[0111] From the perspective of the accompanying drawings, the cup cover 320 is installed at the bottom opening of the cup body 310, and the two are rotatably connected. When the cup cover 320 is flipped downward, the cup body 310 is opened, and the garbage stored in the storage cavity 330 can be automatically dumped under the action of gravity. When the cup cover 320 is flipped upward, it will be blocked at the bottom opening of the cup body 310. And after the cup cover 320 is closed, the cup cover 320 and the cup body 310 can be locked by a locking structure. The locking structure is a prior art and will not be described here. After the cup cover 320 is closed, the cup cover seal 630 seals the cup cover 320 and the cup body 310 to ensure the sealing of the connection between the two, so that dust particles will not fly out of the gap to the outside.

[0112] In addition, when the mesh filter 710 and the dust cup 300 are integrally formed, the garbage and dust stored in the storage chamber 330 are separated by the mesh filter 710 at the bottom of the storage chamber 330, and the operation of pouring out the dust from the top of the dust cup 300 cannot be realized. Therefore, the method of opening the cup cover 320 and pouring out the dust from the bottom in the above embodiment is adopted. When pouring out the dust, large particles of dust are blocked by the mesh filter 710 and will not reach the air inlet filter 420 and the air outlet filter 430, but are all deposited at the bottom of the storage chamber 330. They can be poured out by simply opening the cup cover 320. For some fine dust particles attached to the surface of the air inlet filter 420 and the air outlet filter 430, the entire filter assembly 400 can be taken out from the top of the dust cup 300 for cleaning. See. Figure 2 , Figure 3 , Fig.10 and Fig.11 In some embodiments, the cup lid seal 630 is installed on the cup lid 320, and includes an annular side wall seal portion 631 and a bottom wall seal portion 632. The bottom wall seal portion 632 is arranged on the end wall of the cup lid 320 close to the cup body 310, and the side wall seal portion 631 extends outward from the inner circle of the bottom wall seal portion 632. After the cup lid 320 is closed, the end of the side wall seal portion 631 facing away from the bottom wall seal portion 632 abuts against the inner wall of the cup body 310.

[0113] Specifically, the cup cover seal 630 includes an annular embedded portion 633, the bottom end of the embedded portion 633 is embedded in the cup cover 320, and the bottom wall sealing portion 632 extends outward from the top end of the embedded portion 633 and fits the inner end surface of the cup cover 320. The side wall sealing portion 631 extends outward obliquely from the bottom wall sealing portion 632. After the cup cover 320 is closed, the bottom wall sealing portion 632 is clamped between the end surface of the cup cover 320 and the end surface of the cup body 310, and the side wall sealing portion 631 abuts against the inner side wall of the cup body 310, thereby sealing the cup cover 320 and the cup body 310.

[0114] In other embodiments, the cup cover seal 630 may also be configured in other shapes, for example, an annular sealing ring may be directly disposed between the cup cover 320 and the cup body 310 .

[0115] Furthermore, in some embodiments, the inner wall of the cup body 310 includes a tapered surface 311 , and after the cup cover 320 is closed, the side wall sealing portion 631 abuts against the tapered surface 311 , and the diameter of the tapered surface 311 gradually increases in a direction approaching the cup cover 320 .

[0116] Specifically, the bottom area on the inner wall of the cup body 310 close to the cup cover 320 is set as a conical surface 311. With such a design, when the cup cover 320 is gradually closed, the side wall sealing portion 631 will first abut against the lower end area with a larger diameter on the conical surface 311, and will subsequently abut against the upper end area with a smaller diameter on the conical surface 311, thereby gradually increasing the degree of tightness. In this way, not only can the sealing effect of the cup cover 320 after closing be guaranteed, but also when the cup cover 320 is just flipped upward, it is not easy to cause difficulty in closing the cup cover 320 due to excessive tightness between the side wall sealing portion 631 and the conical surface 311.

[0117] In other embodiments, the inner wall of the cup body 310 may also be directly configured as a whole cylindrical surface.

[0118] See also Figure 2 , Figure 8 , Fig. 9 , Fig.11 and Fig.13 In the embodiment of the present application, an annular outer ring seal 610 is provided between the outer ring 520 and the side wall of the fuselage 100, and the outer ring seal 610 abuts against the stopper 440. The annular inner ring seal 620 passes through the connecting member 530, and one end of the inner ring seal 620 is sealed and connected between the inner ring 510 and the air inlet 210 along the first direction, and the other end of the inner ring seal 620 is sleeved on the outer side of the inner ring 510 along the first direction, and is sealed and connected to the outlet of the sleeve 412. The cup cover seal 630 is used to seal and connect the cup body 310 and the cup cover 320 after the cup cover 320 is closed.

[0119] Through the above three sealing structures, the bottom end of the outer ring member 520 of the support frame 500, the top end of the stopper 440 and the bottom end of the fuselage 100 can be sealed; at the same time, the top end of the inner ring member 510 of the support frame 500 and the air inlet 210 are sealed, and the outlet of the sleeve 412 and the bottom end of the inner ring member 510 are sealed; and the sealing of the connection between the cup cover 320 and the cup body 310 can also be ensured. In this way, the air inlet path and the air outlet path can be sealed, and the airflow flowing in from the airflow inlet 333 can be ensured to flow according to the preset path (airflow inlet 333-mesh filter 710-air inlet filter 420-sleeve 412-air inlet 210-air outlet 220-silence cotton 120-air outlet filter 430-airflow outlet 334), completing layer-by-layer filtering and achieving a better filtering effect.

[0120] See also Figure 1 In some embodiments, the cleaning device includes the negative pressure suction device in any of the aforementioned embodiments.

[0121] The above-mentioned cleaning equipment, by applying the above-mentioned negative pressure suction device, can simplify the disassembly and assembly process of the air inlet filter 420 and the air outlet filter 430, making the operation more convenient and efficient, and can reduce fluid energy loss, improve suction efficiency, and achieve better cleaning effect.

[0122] Preferably, an extension tube may be installed at the inlet end of the air inlet pipe 720 of the negative pressure suction device to facilitate cleaning of areas such as the ceiling that are far away.

[0123] See also Figure 1 In some embodiments, the cleaning device includes a floor brush assembly and a suction pipe, one end of the suction pipe is connected to the air inlet pipe 720 of the negative pressure suction device, and the other end is connected to the floor brush assembly.

[0124] Specifically, a suction pipe is connected to the inlet of the air inlet pipe 720, and a floor brush assembly is connected to the inlet of the suction pipe. When the negative pressure suction device works to provide suction force, the floor brush assembly cleans the floor, and dust and the like are sucked in, and then flow into the air inlet pipe 720 from the suction pipe. A protective shell 730 is also provided outside the air inlet pipe 720 to protect the air inlet pipe 720.

[0125] Preferably, the floor brush assembly can be detachably mounted on the suction pipe, or the suction pipe can be detachably mounted on the air inlet pipe 720, so that the negative pressure suction device can be used alone to suction areas such as sofas and curtains, or used in conjunction with the floor brush assembly to suction the floor.

[0126] In other embodiments, the floor brush assembly may also be replaced with other brush heads for cleaning surfaces made of different materials.

[0127] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A negative pressure suction device, characterized in that: The negative pressure suction device comprises: Body (100); a motor (200) installed in the body (100), the motor (200) having an air inlet (210) and an air outlet (220) located on an air flow path, the air flow path being a path of air flow passing through the negative pressure suction device; and A dust cup module (30) is detachably connected to one end of the body (100) close to the air inlet (210); The dust cup module (30) comprises a dust cup (300) and a filter assembly (400), the dust cup (300) having a storage chamber (330), the filter assembly (400) being installed in the storage chamber (330), the filter assembly (400) comprising an air inlet filter (420) and an air outlet filter (430) both being located on the air flow path and being integrally arranged, and on the air flow path, the air inlet filter (420) is located upstream of the air inlet (210), and the air outlet filter (430) is located downstream of the air outlet (220).

2. The negative pressure suction device according to claim 1, characterized in that: The filter assembly (400) comprises a bracket (410), and the air inlet filter (420) and the air outlet filter (430) are both mounted on the bracket (410); the dust cup (300) has an air flow inlet (333) for air to flow into the negative pressure suction device, and an air flow outlet (334) for air to flow out of the negative pressure suction device, and the bracket (410) divides the storage chamber (330) into a first space (331) and a second space (332), the first space (331) is connected to the air flow inlet (333) and the air inlet (210), and the second space (332) is connected to the air flow outlet (334) and the air outlet (220), the air inlet filter (420) is located in the first space (331), and the air outlet filter (430) is located in the second space (332).

3. The negative pressure suction device according to claim 2, characterized in that: The airflow path includes an air inlet path and an air outlet path, the air inlet path is the path of the airflow flowing from the airflow inlet (333) toward the air inlet (210), and the air outlet path is the path of the airflow flowing from the air outlet (220) toward the outside, and the air inlet path and the air outlet path are in opposite directions in at least part of the area.

4. The negative pressure suction device according to claim 2, characterized in that: The negative pressure suction device has a handle (130), and the air flow outlet (334) is arranged on the side wall of the dust cup (300) and along the radial direction of the rotor shaft of the motor (200). The air flow outlet (334) is located on the side away from the handle (130) and along the axial direction of the rotor shaft of the motor (200), the air flow outlet (334) is spaced from the handle (130).

5. The negative pressure suction device according to claim 4, characterized in that: The bracket (410) comprises a partition (411) connected to the cavity wall of the storage cavity (330), and a sleeve (412) extending from the partition (411) toward the air inlet (210); the end of the sleeve (412) facing away from the partition (411) is connected to the air inlet (210); the partition (411) is provided with a through hole (4111) penetrating the partition and connected to the sleeve (412); the inner wall of the sleeve (412), the end of the partition (411) facing away from the air inlet (210), and the cavity wall of the storage cavity (330) constitute the first space (331); the outer wall of the sleeve (412), the end of the partition (411) close to the air inlet (210), and the cavity wall of the storage cavity (330) constitute the second space (332). Preferably, the air inlet filter (420) is filter cotton, which is installed in the through hole (4111), and the end of the partition (411) facing away from the sleeve (412) is connected to a cyclone filter, and the air outlet filter (430) is sleeved on the outside of the sleeve (412). Preferably, the air inlet filter (420) is an air inlet HEPA, the air inlet HEPA is connected to one end of the partition (411) away from the sleeve (412), and the air outlet filter (430) is sleeved on the outside of the sleeve (412). Preferably, the air outlet filter (430) is an annular filter cotton sleeved on the outside of the sleeve (412). Preferably, the annular filter cotton is configured to absorb fragrance factors. Preferably, the filter assembly (400) includes a limit member (440) which is spaced apart and sleeved on the outside of the sleeve (412); the limit member (440) is sealingly connected to the end of the body (100) close to the air inlet (210) along a first direction; the limit member (440) is annular and has a hollow side wall; the annular filter cotton is clamped between the limit member (440) and the sleeve (412); the first direction is the axial direction of the rotor shaft of the motor (200). Preferably, there is a gap between the motor (200) and the side wall of the body (100), and a sound-absorbing cotton (120) is arranged in the gap, and the airflow flowing out of the air outlet (220) passes through the sound-absorbing cotton (120) and the annular filter cotton in sequence to reach the airflow outlet (334). Preferably, the air inlet (210) and the air outlet (220) are respectively arranged at two ends of the motor (200) along the first direction. Preferably, a support frame (500) is provided in the fuselage (100), and the support frame (500) is supported between the motor (200) and the filter assembly (400), and the airflow flowing out of the sleeve (412) passes through the support frame (500) and flows into the air inlet (210), and the airflow flowing out of the air outlet (220) passes through the silencer cotton (120), the support frame (500) and the annular filter cotton in sequence to reach the airflow outlet (334). Preferably, the support frame (500) includes an inner ring member (510), an outer ring member (520) surrounding the outer side of the inner ring member (510), and a connecting member (530) connected between the inner ring member (510) and the outer ring member (520), the inner ring member (510) is hollow and plugged into the sleeve (412) to enable fluid communication between the sleeve (412) and the air inlet (210), the connecting member (530) is hollow, and the outer ring member (520), the limit member (440) and the fuselage (100) are sealed to enable fluid communication between the silencer cotton (120) and the annular filter cotton. Preferably, an annular outer ring seal (610) is provided between the outer ring member (520) and the side wall of the fuselage (100), and the outer ring seal (610) abuts against the limiting member (440). Preferably, it also includes an inner ring seal (620) that passes through the connecting member (530) and is in an annular shape, wherein one end of the inner ring seal (620) is sealedly connected between the inner ring member (510) and the air inlet (210) along the first direction, and the other end of the inner ring seal (620) is sleeved on the outer side of the inner ring member (510) along the first direction and is sealedly connected to the outlet of the sleeve (412). Preferably, the connecting member (530) includes an annular connecting portion (531), and a plurality of guide portions (532) arranged at intervals along the circumference of the connecting portion (531), and the plurality of guide portions (532) are connected between the outer wall of the connecting portion (531) and the inner wall of the outer ring member (520), and in the direction from the sound-absorbing cotton (120) to the annular filter cotton, the radial size of each of the guide portions (532) along the connecting portion (531) gradually decreases.

6. The negative pressure suction device according to claim 5, characterized in that: The end of the sleeve (412) facing away from the partition (411) extends beyond the end of the air outlet filter (430) facing away from the partition (411). Preferably, the sleeve (412) is provided with a hand-held portion (4121) protruding outward in its radial direction at one end thereof which is away from the partition (411).

7. The negative pressure suction device according to claim 5, characterized in that: A mesh filter (710) is installed in the first space (331), and on the air flow path, the mesh filter (710) is located upstream of the air inlet filter (420). Preferably, the mesh filter (710) mounted on the outside of the air inlet HEPA is installed at one end of the partition (411) away from the sleeve (412), and the mesh filter (710) has mesh holes (711) connecting its external space and internal space. Preferably, the inner wall of the mesh filter (710) has the same shape as the outer wall of the air inlet HEPA and has an equal spacing therebetween. Preferably, the mesh filter (710) and the dust cup (300) are integrally formed.

8. The negative pressure suction device according to claim 1, characterized in that: The dust cup (300) has an air flow inlet (333) for air flow to flow into the negative pressure suction device, and an air inlet pipe (720) is arranged at the air flow inlet (333), and the angle between the central axis of the air inlet pipe (720) at the air flow inlet (333) and the tangent of the dust cup (300) at the air flow inlet (333) is less than 90 degrees.

9. The negative pressure suction device according to claim 1, characterized in that: The dust cup (300) comprises a cup body (310), a cup cover (320) and a cup cover seal (630); the cup cover (320) is rotatably connected to one end of the cup body (310) away from the motor (200); and the cup cover seal (630) is used to seal the cup body (310) and the cup cover (320) after the cup cover (320) is closed. Preferably, the cup lid seal (630) is installed on the cup lid (320), and includes an annular side wall sealing portion (631) and a bottom wall sealing portion (632); the bottom wall sealing portion (632) is arranged on the end wall of the cup lid (320) close to the cup body (310); the side wall sealing portion (631) extends outward from the inner circle of the bottom wall sealing portion (632); after the cup lid (320) is closed, one end of the side wall sealing portion (631) facing away from the bottom wall sealing portion (632) abuts against the inner wall of the cup body (310). Preferably, the inner side wall of the cup body (310) includes a conical surface (311), and after the cup cover (320) is closed, the side wall sealing portion (631) abuts against the conical surface (311), and the diameter of the conical surface (311) gradually increases in a direction approaching the cup cover (320).

10. A cleaning device, characterized in that A negative pressure suction device comprising any one of claims 1 to 9. Preferably, the cleaning device comprises a floor brush assembly and a suction pipe, one end of the suction pipe is connected to the air inlet pipe (720) of the negative pressure suction device, and the other end is connected to the floor brush assembly.

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