CN216842291U - Negative-pressure air fan assembly and cleaning barrel - Google Patents

Abstract

The utility model relates to an intelligence household electrical appliances technical field provides a negative-pressure air fan subassembly and clean bucket, and this negative-pressure air fan subassembly includes: the support frame is provided with an inner cavity with a circular structure, and at least one opening communicated with the inner cavity of the support frame is arranged on the lower part of the support frame in the circumferential direction; the fan motor is fixedly arranged at the lower part of the support frame through the connecting frame and is positioned in the opening; the inner tube, the lower part circumference of inner tube is provided with at least one air outlet, and the inner tube detachable installs in the inner chamber of support frame, and the air outlet sets up with fan motor's gas outlet relatively. When the negative pressure fan assembly is applied to the garbage can, air in the inner barrel of the inner cavity of the support frame can be effectively exhausted, especially, when a plastic bag is sleeved into the inner barrel, negative pressure can be formed in the inner barrel due to the action of the fan motors, the plastic bag can be conveniently sleeved into the inner barrel of the garbage can in a complete and attached mode, and operation is facilitated.

Description

Negative-pressure air fan assembly and cleaning barrel

Technical Field

The utility model relates to an intelligence household electrical appliances technical field, more specifically say, relate to a negative-pressure air fan subassembly and clean bucket.

Background

A cleaning bucket or trash can refers to a container for holding trash. According to different places of use, the garbage can be divided into a public garbage can, a household garbage can and a medical garbage can. The plastic bag is put into to the cleaning barrel when needs are used, alright handle after packing the garbage bin in the plastic bag after rubbish is full of the plastic bag. In the process of sleeving the plastic bag into the garbage can, air stored in the garbage can prevent the garbage bag from being firmly attached to the inner wall of the garbage can.

In order to overcome the above problems, the conventional method is to manually put the plastic bag into the trash can completely after the plastic bag is sleeved into the trash can and to arrange and attach the plastic bag completely to the inner wall of the trash can. Particularly, when a garbage can or a cleaning can with a large size is sleeved in the plastic bag, the plastic bag can be well attached to the garbage can only by completely inserting the whole arm or the upper half body into the inner cavity of the garbage can. Therefore, the process of sleeving the plastic bag into the garbage can is inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a negative-pressure air fan subassembly and clean bucket to solve the garbage bin among the prior art and embolia the technical problem of the complete fine laminating of plastic bag can not be at the inner wall of garbage bin in the in-process plastic bag.

In order to achieve the above object, on the one hand, the utility model provides a negative-pressure air fan subassembly, negative-pressure air fan subassembly includes:

the supporting frame is provided with an inner cavity with a circular structure, and at least one opening communicated with the inner cavity of the supporting frame is arranged on the lower part of the supporting frame in the circumferential direction;

the fan motor is fixedly arranged at the lower part of the supporting frame through the connecting frame and is positioned in the opening;

the inner tube, the lower part circumference of inner tube is provided with at least one air outlet, and the inner tube detachable installs in the inner chamber of support frame, and the air outlet sets up with fan motor's gas outlet relatively.

In some embodiments, the number of the openings is two, any one opening is arranged at the lower part of any one side wall of the support frame, the other opening is arranged at the lower part of the other adjacent side wall, the number of the fan motors is two, any one fan motor is fixedly arranged at the lower part of the support frame through the connecting frame and is positioned in any one opening, and the other fan motor is fixedly arranged at the lower part of the support frame through the connecting frame and is positioned in the other opening.

In some embodiments, the number of the openings is four, the four openings are respectively arranged at the lower parts of the four outer walls of the support frame, the number of the fan motors is four, and the four fan motors are respectively fixedly installed at the lower parts of the four outer walls of the support frame through the connecting frame and are respectively located in the corresponding openings.

In some embodiments, the fan further comprises an inductive switch, a battery and a controller, wherein the inductive switch is connected with the controller through a line, the battery is connected with the controller through a line, and the controller is connected with the fan motor through a line.

In some embodiments, the inductive switch is fixedly mounted at the bottom of the inner cavity of the support frame and used for sensing the movement of the inner cylinder.

In some embodiments, the inductive switch is any one of an infrared inductive switch, a microwave inductive switch, an ultrasonic inductive switch, a piezoelectric inductive switch, an electromagnetic inductive switch, and a capacitive inductive switch.

In some embodiments, the battery is a lithium ion battery or a lead acid battery.

In some embodiments, the outer profile of the support frame is a circular or rectangular configuration.

In some embodiments, the controller is a single-chip or microprocessor.

On the other hand, the utility model provides a clean bucket, clean bucket includes foretell negative-pressure air fan subassembly.

The utility model provides a negative-pressure air fan subassembly's beneficial effect lies in at least: when the negative pressure fan assembly is applied to the garbage can, air in the inner barrel of the inner cavity of the support frame can be effectively exhausted, especially, when a plastic bag is sleeved into the inner barrel, negative pressure can be formed in the inner barrel due to the action of the fan motors, the plastic bag can be conveniently sleeved into the inner barrel of the garbage can in a complete and attached mode, and operation is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of a negative pressure fan assembly provided in an embodiment of the present invention;

fig. 2 is a schematic perspective view of an inner cylinder in a negative pressure fan assembly according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of a cover device in a cleaning bucket according to an embodiment of the present invention;

fig. 4 is a schematic view of an unfolding mechanism of the cover device in the cleaning bucket according to the embodiment of the present invention;

fig. 5 is a schematic perspective view of a driving mechanism of a cover device in a cleaning bucket according to an embodiment of the present invention.

Fig. 6 is a schematic circuit diagram of a negative pressure fan assembly according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless explicitly defined otherwise.

As shown in fig. 1 and 2, a negative pressure fan assembly is provided. Fig. 1 shows a schematic perspective view of a negative pressure fan assembly in the present embodiment. Fig. 2 is a schematic perspective view showing the inner cylinder. The suction fan assembly 10 includes a support frame 101, a fan motor 102, and an inner barrel 104. The support frame 101 has an interior cavity. The outer contour of the support frame 101 is a circular structure or a rectangular structure. In some embodiments, the lumen is a circular lumen or a rectangular lumen, which is not limited herein. The inner barrel 104 is removably mounted within the interior of the support housing 101. The outer contour of the inner barrel 104 is in gas-tight connection with the inner cavity. In some embodiments, the outer profile of the inner barrel 104 is a circular or rectangular configuration. At least one opening 1011 penetrating the inner cavity of the support frame 101 is formed in the lower circumferential direction of the support frame 101. The shape of the opening 1011 is a circular or rectangular configuration. The fan motor 102 is fixedly mounted at the lower part of the support frame 101 through the connecting frame 103 and is positioned in the opening 1011. In some embodiments, the fan motor 102 is installed at a lower portion of the support frame 101 in an inclined manner by means of a connection frame 103. The included angle between the central line of the fan motor 102 and the circumferential wall surface of the support frame 101 is 30-90 degrees. Specifically, the angle may be 35 °, 45 °, 60 °, 65 °, 70 °, 80 °, or the like. By adopting the technical scheme, the air in the inner barrel 104 can be effectively and quickly exhausted by the fan motor 102. At least one air outlet 1041 is circumferentially provided at a lower portion of the inner tube 104. The air outlet 1041 and the opening 1011 at the lower portion of the supporting frame 101 are opposite to each other. The air outlet 1041 is disposed opposite to the air outlet of the fan motor 102. In some embodiments, the outlet 1041 disposed on the inner barrel 104 is a mesh structure.

The negative pressure fan assembly provided by the embodiment has the beneficial effects that when the negative pressure fan assembly is applied to a cleaning barrel, air in the inner barrel of the inner cavity of the support frame can be effectively discharged, and particularly, when a plastic bag is sleeved into the inner barrel, negative pressure can be formed in the inner barrel due to the action of the fan motors, so that the plastic bag can be sleeved into the inner barrel of the garbage barrel completely and in a fitting manner, and the operation is facilitated.

As shown in FIG. 6, in some embodiments the negative pressure fan assembly 10 further comprises an inductive switch 105, a battery 107, and a controller 108. The controller 108 is any one of a single chip microcomputer and a microprocessor, but is not limited thereto. The inductive switch 105 is connected to the controller 108 via a wire, the battery 107 is connected to the controller 108 via a wire, and the controller 108 is connected to the fan motor 102 via a wire. The inductive switch 105, the battery 107 and the controller 108 are all mounted on the support frame 101. Specifically, the inductive switch 105 is located in the inner cavity of the support frame 101 and at the bottom of the inner cavity. The inductive switch 105 can be in contact with the bottom of the inner drum 104 for sensing the movement of the inner drum 104 and converting the sensed movement of the inner drum 104 into an electrical signal to be transmitted to the controller 108, and the controller 108 controls the on/off of the fan motor 102. The battery 107 and the controller 108 are fixedly mounted at the bottom of the support frame 101 and at the bottom surface of the support frame 101. In some embodiments, the inductive switch 105 is any one of an infrared inductive switch, a microwave inductive switch, an ultrasonic inductive switch, a piezoelectric inductive switch, an electromagnetic inductive switch, and a capacitive inductive switch. Battery 107 is a rechargeable lithium ion or lead acid battery. In other embodiments, the battery 107 may be a dry cell battery.

Referring again to fig. 1 and 2, in some embodiments, the number of the openings 1011 of the support frame 101 is two, and any one of the openings 1011 is disposed at a lower portion of any one of the side walls of the support frame 101, and another one of the openings 1011 is disposed at a lower portion of another adjacent side wall. Similarly, the number of the fan motors 102 is two, any fan motor 102 is fixedly mounted at the lower part of the support frame 101 through the connecting frame 103 and is located in any opening 1011, and the other fan motor 102 is fixedly mounted at the lower part of the support frame 101 through the connecting frame 103 and is located in the other opening 1011. The two fan motors 102 are electrically connected to the controller 108 through independent lines. The controller 108 controls the on and off of both fan motors 102 simultaneously. Similarly, in the present embodiment, two air outlets 1041 of the inner barrel 104 correspond to the two fan motors 102.

In some embodiments, the number of openings 1011 of the support frame 101 is four. The four openings 1011 are respectively provided at lower portions of the four outer walls of the support frame 101. Similarly, the number of the fan motors 102 is four, and the four fan motors 102 are respectively fixedly mounted at the lower parts of the four outer walls of the support frame 101 through the connecting frame 103 and respectively located in the corresponding openings 1011. The four fan motors 102 are electrically connected to the controller 108 through independent lines. The controller 108 controls the four fan motors 102 to turn on and off simultaneously.

In some embodiments, a cleaning bucket is provided having the negative pressure fan assembly 10 of the present embodiment. In this embodiment, the cleaning bucket further comprises a cover device 20. The cover device 20 is detachably mounted on the top of the support frame 101. Referring to fig. 3 and 4, fig. 3 is a perspective view of the cover device 20. Fig. 4 shows a schematic view of the developed structure of the cover device 20. The cover device 20 includes a driving mechanism 30. The cover device 20 further includes a cover plate 201, a frame 202 and a limit switch 106. In some embodiments, the cover plate 201 has a circular or rectangular structure, and likewise, the frame 202 may have a circular or rectangular structure, which is not limited herein. The cover 201 is located on top of the frame 202 and is movably hinged to the frame 202 by the driving mechanism 30. The cover plate 201 can be controlled to be buckled on the top of the frame 202 in a retractable way through the action of the driving mechanism 30 so as to block the top opening of the inner barrel 104. In some implementations, the cover plate 201 is a unitary structure. When the cover plate 201 is of an integral structure, the cover plate 201 can be movably hinged at the top opening of the cleaning bucket through at least one driving mechanism 30. In other embodiments, the cover plate 201 is a two-part structure, and when the cover plate 201 is a two-part cover plate, the two-part cover plate 201 can be driven to turn over by at least two driving mechanisms 30. In this embodiment, the two-part cover 201 can be flipped synchronously or asynchronously by the two driving mechanisms 30.

As shown in fig. 5, a schematic perspective view of the driving mechanism 30 in the present embodiment is disclosed. The drive mechanism 30 includes a drive motor 31, a support assembly 32, a transmission assembly 33, and a crank assembly 34. The drive motor 31 is fixedly mounted on the support assembly 32. The transmission assembly 33 comprises a driving wheel 331, a transmission belt 332 and a driven wheel 333, the driving wheel 331 and the driven wheel 333 are both mounted on the support assembly 32, the driving wheel 331 is connected with the driving motor 31, and the driving wheel 331 and the driven wheel 333 are in transmission connection through the transmission belt 332. The crankshaft assembly 34 includes a connecting portion 341 and a crankshaft 342, the crankshaft 342 being connected to the driven pulley 333 by the connecting portion 341.

In the present embodiment, the supporting assembly 32 includes a supporting plate 321 and a supporting frame 322, and the supporting frame 322 is vertically disposed on a surface of the supporting plate 321. The specific structure of the supporting plate 321 and the supporting frame 322 can be set as required, and for example, the supporting plate can be a plate-shaped structure or other structures, and can be made of a metal material or a plastic material, which is not limited herein. The driving motor 31 is a servo motor or a stepping motor, which is disposed on two sides of the supporting frame 322 with the transmission assembly 33, the body of the driving motor 31 is detachably connected to the supporting frame 322 by bolts or screws, and the main shaft of the driving motor 31 passes through the supporting frame 322 to be connected with the driving wheel 331, so as to drive the driving wheel 331 to rotate. The driving wheel 331, the transmission belt 332 and the driven wheel 333 are disposed at one side of the supporting frame 322 along a direction perpendicular to the supporting plate 321, and the driving wheel 331 drives the driven wheel 333 to rotate through the transmission belt 332, so as to drive the crank shaft 142 connected to the driven wheel to rotate. In other embodiments, the driving mechanism 30 may be a hydraulic driving mechanism or a pneumatic driving mechanism, etc. according to the specific shape or specific application of the cleaning bucket.

The driving mechanism provided by the embodiment of the disclosure has very wide application, for example, can be applied to the cover plate 201 to be opened and closed in the cover device 20, and the driving motor is adopted to drive the crank shaft 342 in combination with the driving wheel 331 and the transmission belt 332. In addition, adopt above-mentioned technical scheme can effectual buffering load impact, operate steadily, noise and vibrations are less, have certain overload protection function.

In some embodiments, the crank 342 has a circular arc shape, and the arc of the crank 342 is between 80 ° and 110 °, such as 80 °, 85 °, 90 °, 95 °, 100 °, 105 °, 110 °, etc. The crank shaft 342 is made of a metal material (e.g., the metal material may be an aluminum alloy or a cast aluminum material, etc.) or a plastic material (e.g., ABS plastic or other plastic materials), which is not limited herein.

Further, the specific structure of the connection portion 341 may be set as needed. For example, the connecting portion 341 includes at least two connecting posts, a through hole is formed on the crank shaft 342, a fixing hole is formed at a position of the driven wheel 333 corresponding to the through hole, and the connecting posts penetrate through the through hole and are accommodated in the fixing holes, so that the crank shaft 342 and the driven wheel 333 are relatively fixed. It should be understood that the number of through holes is the same as the number of connecting posts to ensure that each connecting post is received in one through hole. Optionally, the number of the connecting columns is three, and the three connecting columns are arranged in a triangle to ensure that the connection is firmer and that the driven wheel 333 rotates the crank shaft 342 more smoothly. Of course, the number of the connecting columns can also be 3, 4 or more, and is not limited here.

The specific types of the driving wheel 331 and the driven wheel 333 can be set as required, for example, the driving wheel 331 and the driven wheel 333 can be both belt pulleys, in this case, the transmission belt 332 is a belt, and the driving wheel 331 drives the driven wheel 333 to rotate through belt transmission. For another example, the driving wheel 331 and the driven wheel 333 may both be sprockets, the conveying belt 332 is a chain, the number of the chains may be 1 or more, and the driving wheel 331 drives the driven wheel 333 to rotate through chain transmission. At this time, the driving wheel 331 is directly sleeved on the main transmission shaft 334, the driven wheel 333 is directly sleeved on the driven transmission shaft 335, a plurality of circumferential grooves are respectively arranged on the circumferential outer walls of the driving wheel 331 and the driven wheel 333, and the number of the circumferential grooves on the driving wheel 331 is equal to that of the circumferential grooves on the driven wheel 333. A plurality of conveyor belts 3012 can be clamped in the circumferential grooves of the driving wheel 331 and the driven wheel 333 at the same time, so that the driving wheel 331 and the driven wheel 333 are in transmission connection.

Further, drive assembly 33 also includes a drive shaft 334 and a driven shaft 335, with drive shaft 334 being disposed parallel to driven shaft 335. The main transmission shaft 334 is connected to a main shaft of the driving motor 31, the secondary transmission shaft 335 is rotatably mounted in a bearing seat 336 through a bearing sleeved thereon, and the bearing seat 336 is fixedly mounted on the support plate 321 of the support assembly 32. Optionally, the bearing seat 336 and the driven wheel 333 are disposed on opposite sides of the support frame 322, and the bearing is sleeved on the end of the driven shaft 335.

It is also an object of the disclosed embodiment to provide a cover device 20, fig. 3 shows a schematic structural view when the cover device 20 is closed, and fig. 4 shows a schematic structural view when the cover device 20 is unfolded. The cover device 20 includes the driving mechanism 30, a cover plate 201, a frame 202 and a limit switch 106. The shape of the cover plate 201 can be set according to the requirement, for example, it can be a circular structure or a rectangular structure, and the frame 202 can be a circular structure or a rectangular structure, to ensure the cover plate 201 is matched with the frame 202. The cover plate 201 is disposed on the top of the frame 202 and movably hinged to the frame 202 via the driving mechanism 30, and the limit switch 106 is fixedly mounted on the frame 202 and is used for contacting with the end of the crank shaft 342 to perform a limiting function.

The cover device 20 provided by the embodiment of the present disclosure controls the cover plate 201 to be fastened on the top of the frame 202 in an openable manner by the action of the driving mechanism 30, so as to close the frame 202. The limit switch 106 may be a mechanical switch, an infrared sensing switch, or other sensor with a switching function, and is not limited herein. The limit switch 106 is electrically connected with the driving motor 31 in the driving mechanism 30 through a circuit, and the opening and closing of the cover plate 201 and the control of the opening and closing angle can be realized through the effects of the limit switch 106 and the driving motor 31.

Specifically, the driving motor 31 is electrically connected with the controller 108, the controller 108 is electrically connected with the limit switch 106 through a circuit, and the controller 108 controls the opening and closing of the driving motor 31 to control the turning angle of the cover plate 201. The controller 108 controls the driving motor 31 to drive the crank shaft 342 fixedly connected with the cover plate 201 to rotate and then contact the limit switch 106 on the mounting frame 202 or the limit switch 106 on the support plate 10, so as to control the driving motor 31 to stop rotating. When the controller 108 controls the driving motor 31 to rotate reversely, the cover 201 can be closed.

The cover device 20 provided by the embodiment of the present disclosure adopts the above-mentioned driving mechanism 30, and the driving mechanism 30 adopts the driving motor to drive the crank shaft 342 in combination with the driving wheel 331 and the conveyor belt 332, so that the whole technical scheme has a simple structure and a lower manufacturing cost, has better stability compared with a driving gear transmission mechanism, does not have the problem of being stuck or unsmooth in opening and closing during use, and has a longer service life. In addition, adopt above-mentioned technical scheme can effectual buffering load impact, operate steadily, noise and vibrations are less, have certain overload protection function.

Several specific embodiments of the cover device 20 are given below. It should be understood that the following embodiments are only for illustrating the structure of the cover device 20, and are not intended to limit the cover device 20.

Example one

The cover device 20 includes a driving mechanism 30, a cover plate 201, a frame 202 and a limit switch 106. The frame 202 has four side plates, which are sequentially fixedly connected end to form a quadrilateral frame structure. The cover 201 is movably hinged to either side of the frame 202 by the drive mechanism 30. Either side of the cover plate 201 is fixedly connected to the end of the crank shaft 342 in the drive mechanism 30. When the crank shaft 342 is turned over by the driving of the driving motor 31, the cover plate 201 is driven to turn over. The driving mechanism 1 is fixedly installed at the bottom of the frame 202, specifically, at the bottom of the sideboard and at the middle position of the sideboard. The limit switch 106 is fixedly installed on the side plate or the supporting plate 321, and the limit switch 106 may be a mechanical switch, an infrared inductive switch or a sensor with an on-off function, and is used for inducing the cover plate 201 or the crank 342 to open and close the driving motor 31.

Example two

The cover device 20 includes two driving mechanisms 30, a cover plate 201, a frame 202 and at least one limit switch 106. The cover 201 is movably hinged to either side of the frame 202 by two drive mechanisms 30. Specifically, any one side of the cover plate 201 is fixedly connected with the end portions of the crank shafts 342 of the two driving mechanisms 30, any one driving mechanism 30 is fixedly installed at the bottom position of one end of the side plate of the frame 202, the other driving mechanism 30 is fixedly installed at the bottom position of the other end of the side plate of the frame 202, and the two driving mechanisms 30 move synchronously. The cover plate 201 is turned over through the two driving mechanisms 30, and the opening and closing stability of the cover plate 201 is improved. The limit switch 106 is fixedly installed on the side plate or on the supporting plate 321 of any driving mechanism 30, and is used for sensing the opening and closing of the cover plate 201 or the crank shaft 342 to the driving motor 31.

EXAMPLE III

The cover device 20 includes two driving mechanisms 30, two cover plates 201, a frame 202 and two limit switches 106, wherein any one of the cover plates 201 is movably hinged on any side plate of the frame 202 through any one of the driving mechanisms 30, and the other one of the cover plates 201 is movably hinged on the other side plate of the frame 202 through the other one of the driving mechanisms 30. Two cover plates 201 are symmetrically arranged on the top of the frame 202. The two cover plates 201 respectively realize the turnover of the cover plates 201 through different driving mechanisms 30, and further realize the blocking of the opening of the frame 202. The two cover plates 201 are moved synchronously by the drive mechanism 30. Specifically, any one of the driving mechanisms 30 is fixedly installed at the middle position of any one of the side plates, and the other driving mechanism 30 is fixedly installed at the middle position of the other side plate. By dividing the cover plate 201 into two parts and driving by different driving mechanisms 30, the bearing capacity of the driving mechanism 30 can be effectively improved. The two cover plates 201 can be made of metal material with heavier mass. Any limit switch 106 is fixedly arranged on the side plate on any side, and the other limit switch 106 is fixedly arranged on the side plate on the other side. Alternatively, any one of the limit switches 106 is fixedly mounted on the support plate 321 of any one of the driving mechanisms 30, and the other limit switch 106 is fixedly mounted on the support plate 321 of the other driving mechanism 30. The specific installation position of the limit switch 106 can be set and installed according to actual needs. The limit switch 106 may be a mechanical switch, an infrared sensing switch, or a sensor with a switch function, which is not limited herein.

Example four

The cover device 20 includes four driving mechanisms 30, two cover plates 201, and four limit switches 106, wherein any one of the cover plates 201 is movably hinged to any one of the side plates of the frame 202 through the two driving mechanisms 30. Specifically, the two driving mechanisms 30 are respectively and fixedly installed at both end portions of either side plate. The other cover plate 201 is simultaneously hinged to the other side plate of the frame 202 by the remaining two drive mechanisms 30. Specifically, the two driving mechanisms 30 are respectively located at both end portions of the other side plate. The four limit switches 106 are grouped in pairs, any one group of limit switches 106 is fixedly installed on any side edge plate of the frame 202 and is respectively located at two ends of the edge plate, and the other group of limit switches 106 is fixedly installed on the other side edge plate of the frame 202 and is respectively located at two ends of the edge plate. The four driving mechanisms 30 move synchronously to drive the two cover plates 201 to open and close synchronously.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A negative-pressure air fan assembly, comprising:

the support frame is provided with an inner cavity of a circular structure, and at least one opening communicated with the inner cavity of the support frame is arranged on the lower circumference of the support frame;

the fan motor is fixedly arranged at the lower part of the supporting frame through a connecting frame and is positioned in the opening;

the inner tube, the lower part circumference of inner tube is provided with at least one air outlet, the inner tube detachable install in the inner chamber of support frame, the air outlet with fan motor's gas outlet sets up relatively.

2. The suction fan assembly according to claim 1, wherein the number of the openings is two, any one of the openings is disposed at a lower portion of any one of the side walls of the support frame, another one of the openings is disposed at a lower portion of another adjacent side wall, the number of the fan motors is two, any one of the fan motors is fixedly mounted at the lower portion of the support frame through a connecting frame and is disposed in any one of the openings, and another one of the fan motors is fixedly mounted at the lower portion of the support frame through a connecting frame and is disposed in the other opening.

3. The negative-pressure air blower assembly according to claim 1 or 2, wherein the number of the openings is four, the four openings are respectively disposed at the lower portions of the four outer walls of the supporting frame, the number of the fan motors is four, and the four fan motors are respectively fixedly mounted at the lower portions of the four outer walls of the supporting frame through connecting frames and are respectively located in the corresponding openings.

4. The suction fan assembly of claim 1 or 2, further comprising an inductive switch, a battery, and a controller, wherein the inductive switch is connected to the controller via a line, the battery is connected to the controller via a line, and the controller is connected to the fan motor via a line.

5. The suction fan assembly of claim 4, wherein the inductive switch is fixedly mounted at a bottom of the inner cavity of the support bracket for sensing movement of the inner barrel.

6. The suction fan assembly as claimed in claim 5, wherein the inductive switch is any one of an infrared inductive switch, a microwave inductive switch, an ultrasonic inductive switch, a piezoelectric inductive switch, an electromagnetic inductive switch, and a capacitive inductive switch.

7. The negative-pressure air blower assembly of claim 4, wherein the battery is a lithium-ion battery or a lead-acid battery.

8. The suction fan assembly of claim 4, wherein an outer profile of the support bracket is a circular or rectangular configuration.

9. The suction fan assembly of claim 4 wherein said controller is a microprocessor.

10. A cleaning bucket comprising the negative pressure fan assembly of any of claims 1-9.

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