CN217408677U

CN217408677U - Dust removal device and dust collector

Info

Publication number: CN217408677U
Application number: CN202220096296.1U
Authority: CN
Inventors: 裘苗松; 翁洁知
Original assignee: Bosch Power Tools China Co Ltd
Current assignee: Bosch Power Tools China Co Ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-09-13
Anticipated expiration: 2032-01-14
Also published as: EP4212075A1

Abstract

The application provides dust collector and dust catcher. This dust collector includes: a first housing including a first opening and a first cavity therein; a second housing including a second cavity therein; a valve movably mounted in the first opening on a first side and facing the second chamber on a second side, wherein the valve has at least a first position in which the valve closes the first opening and a second position in which the valve opens the first opening, whereby the first chamber is in fluid communication with ambient air; a channel configured to place the first chamber in fluid communication with the second chamber at least when the valve is in the first position such that fluid pressures on the first and second sides of the valve are equal; and an actuator coupled with the valve and configured to selectively drive the valve such that the valve moves between the first position and the second position. The dust removal device has the advantages of simple structure, convenience in implementation, convenience in manufacturing and the like.

Description

Dust removal device and dust collector

Technical Field

The application relates to the field of dust collector structures. More particularly, the present application relates to a dust removing device which aims to provide improved filter cleaning capability. The application also relates to a dust collector comprising the dust removing device.

Background

Vacuum cleaners typically use a pressure differential created by a partial vacuum to draw in outside air and a filter to trap impurities entrained in the outside air. The filter may be made of HEPA (HEPA) material, for example. In operation, impurities trapped in the filter can cause the performance of the filter to gradually degrade. Therefore, the vacuum cleaner is generally provided with a filter cleaning function to clean the foreign substances so that the catching function of the filter is at least partially restored.

SUMMERY OF THE UTILITY MODEL

It is an object of an aspect of the present application to provide a dust removing device that aims to provide the ability to clean a filter. Another object of the present application is to provide a vacuum cleaner including the above dust removing device.

The purpose of the application is realized by the following technical scheme:

a dust extraction device comprising:

a first housing including a first opening and a first cavity therein;

a second housing including a second cavity therein;

a valve, a first side of which is movably mounted in the first opening and a second side of which faces the second chamber, wherein the valve has at least a first position in which the valve closes the first opening and a second position in which the valve opens the first opening, whereby the first chamber is in fluid communication with ambient air;

a channel configured to place the first chamber in fluid communication with the second chamber at least when the valve is in the first position such that fluid pressures on the first and second sides of the valve are equal; and

an actuator coupled with the valve and configured to selectively drive the valve such that the valve moves between the first and second positions.

In the above dust removing device, optionally, the passage is provided in the valve and extends from the first side to the second side.

In the above dust removing device, optionally, the passage is provided in a duct positioned outside the valve, and the duct extends from the first housing to the second housing such that the first chamber and the second chamber are in fluid communication through the duct.

In the above dust removing device, optionally, a seal is provided between the valve and the second housing to prevent ambient air from entering the second chamber through between the valve and the second housing.

In the above dust removing device, optionally, the actuator is provided within the second chamber, and the valve is driven by the rod.

In the above dust removing device, optionally, the passage is provided along a periphery of the rod.

In the above dust removing device, optionally, the second housing is fixed to the first housing by a plurality of support portions, and the first housing and the second housing are spaced apart by a gap, the first opening being positioned toward the gap.

A vacuum cleaner, comprising:

a duct in fluid communication with the first cavity;

a filter installed in the air duct; and

the dust removing device described above, wherein the first opening is oriented toward the filter.

In the above vacuum cleaner, optionally, the filter is positioned to be horizontally disposed, and the valve is oriented to move in a vertical direction.

In the above cleaner, optionally, the actuator is configured to actuate in accordance with one or more of the following conditions: the first predetermined time has elapsed, the cleaner has been operating for a second predetermined time, and the pressure differential in the air duct reaches a predetermined value.

Drawings

The present application will now be described in further detail with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that the drawings are designed solely for the purposes of illustrating the preferred embodiments and that, accordingly, should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the depicted objects and may contain exaggerated displays. The figures are also not necessarily drawn to scale.

FIG. 1 is a perspective view of one embodiment of a dust extraction device of the present application.

Fig. 2 is a cross-sectional view of the embodiment of fig. 1 in a first state during operation.

Fig. 3 is a cross-sectional view of the embodiment of fig. 1 in a second state during operation.

Fig. 4 is another cross-sectional view of the embodiment of fig. 1 in a first state during operation.

Figure 5 is a cross-sectional view of an embodiment of the vacuum cleaner of the present application in a first state during operation.

Fig. 6 is a cross-sectional view of the embodiment of fig. 5 in a second state during operation.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the terms top, bottom, upward, downward, and the like as used herein are defined with respect to the orientation of the various figures. These orientations are relative concepts and will therefore vary depending on the position and state in which they are located. These and other directional terms should not be construed as limiting.

Furthermore, it should also be noted that any single technical feature described or implied in the embodiments herein or any single technical feature shown or implied in the figures can be continuously combined (or equivalents thereof) to obtain other embodiments not directly mentioned herein.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

FIG. 1 is a perspective view of one embodiment of a dust extraction device of the present application. The dust removing device 100 may include a first housing 110, a second housing 120, a valve 140, and the like. Further, the dust removing device 100 may further include a channel 130, an actuator 150, and the like, which are not shown in fig. 1. For the sake of clarity, filter 300 is shown in fig. 1. However, in several subsequent cross-sectional views, the filter 300 is omitted.

The second housing 120 may be configured to be substantially cylindrical and fixed to the first housing 110 by a plurality of support portions 180. Further, the first housing 110 is spaced apart from the second housing 120 forming a gap 190 therebetween. The plurality of support portions 180 may be substantially evenly distributed along the circumference of the second housing 120.

Fig. 2 is a cross-sectional view of the embodiment shown in fig. 1 in a first state during operation, and fig. 3 is a cross-sectional view of the embodiment shown in fig. 1 in a second state during operation. Fig. 2 and 3 show a specific structure of the dust removing device 100. The dust extraction device 100 may include a first housing 110, a second housing 120, a passage 130, a valve 140, and an actuator 150.

The first housing 110 may include a first opening 111 and a first cavity 112 therein. The first opening 111 may have a different structure, such as a ring structure shown in fig. 3. The first opening 111 may be provided therein with a ring-shaped frame and a connection portion supporting the frame.

The second housing 120 may include a second cavity 122 therein. In the illustrated embodiment, the second housing 120 is configured to be substantially cylindrical.

The channel 130 may be positioned between the first housing 110 and the second housing 120 and place the first cavity 112 and the second cavity 122 in fluid communication. In the illustrated embodiment, the passage 130 is disposed in a valve 140. However, the channel 130 may have other forms. For example, a conduit may be disposed between the first housing 110 and the second housing 120, and the conduit may provide fluid communication between the first cavity 112 and the second cavity 122. In this embodiment, the conduit may be located outside the valve 140, or alternatively, the conduit may be located outside the first housing 110 and the second housing 120. In such an embodiment, the conduit functions as the channel 130 in the illustrated embodiment.

The valve 140 includes a first side 141 and a second side 142. In the illustrated embodiment, the first side 141 of the valve 140 may be configured to match in shape the first opening 111, and the second side 142 of the valve 140 may be configured to match in shape the second chamber 122. A seal 170 may be disposed between the valve 140 and the second housing 120 to prevent ambient air from entering the second chamber 122 between the valve 140 and the second housing 120. The valve 140 may be configured to be movable such that the first side 141 is movably disposed in the first opening 111.

The valve 140 may have at least a first position and a second position. Fig. 2 shows the valve 140 in a first position, and fig. 3 shows the valve 140 in a second position. In the first position, the first side 141 of the valve 140 mates with the first opening 111 and seals the first opening 111. At the same time, the second side 142 of the valve 140 seals the second housing 120 by means of the seal 170 such that the second chamber 122 is separated from the ambient air. In the second position, the first side 141 of the valve 140 is separated from the first opening 111 such that the first cavity 112 is in fluid communication with ambient air through the first opening 111. The first and

second sides

141, 142 of the valve 140 may be configured to have a generally circular profile and have an axis of symmetry.

An actuator 150 may be coupled with the valve 140 and selectively drive the valve 140 such that the valve 140 moves between the first and second positions. For example, the actuator 150 may be coupled to the valve 140 by a stem 160, and the channel 130 may be disposed at a periphery of the stem 160. In the illustrated embodiment, the stem 160 extends generally along an axis of symmetry of the valve 140, and the channels 130 are distributed around the location where the stem 160 connects with the valve 140.

Further, the channel 130 is further configured to: fluid communication is established between first chamber 112 and second chamber 122 at least when valve 140 is in the first position. In the state shown in fig. 2, the first chamber 112 and the second chamber 122 are in fluid communication via the channel 130. Thus, the gas pressures experienced by the first side 141 and the second side 142 of the valve 140 are approximately equal. In this case, the actuator 150 need only exert a relatively small force to be able to move the valve 140 into the second position. When the valve 140 is in the second position, the first chamber 112 is in communication with ambient air and, under the effect of the pressure differential, creates an air flow into the first chamber 112 via the gap 190 and the first opening 111.

Fig. 4 is another cross-sectional view of the embodiment of fig. 1 in a first state during operation. Fig. 4 shows another cross-section of the valve 140 and clearly shows the overall structure of the valve 140. Fig. 4 only shows the opening of the channel 130 at the second side 142 of the valve 140, and the other portions of the channel 130 are not visible. As can be seen from fig. 4, the first side 141 and the second side 142 of the valve 140 are continuous at a location outside the channel 130 and thereby provide sealing capability.

Further, one or more protrusions may be provided at the first side 141 of the valve 140. Each protrusion may be shaped to match the shape of the first opening 111 to provide a sealing function.

Figure 5 is a cross-sectional view of an embodiment of the vacuum cleaner of the present application in a first state during operation, and figure 6 is a cross-sectional view of the embodiment of figure 5 in a second state during operation. The vacuum cleaner of the present application may include the duct 200, the filter 300, and the dust removing device 100 described above. Wherein the filter 300 is disposed in the wind tunnel 200, and the dust removing device 100 may be disposed above the filter 300 such that the first opening 111 is oriented toward the filter 300. More specifically, the first opening 111 may be oriented such that the air flow passing through the first opening 111 will pass through the filter 300 from top to bottom in a vertical direction. In the illustrated embodiment, the valve 140 moves in a generally vertical direction.

The air duct 200 may be coupled between the air inlet 210 and the driving motor 220. In the first state shown in fig. 5, the valve 140 closes the first opening 111, and the air flow generated in the wind tunnel 200 is shown by an arrow a 1. The air flow may enter from the air inlet 210 and pass upwardly through the filter 300, during which the filter 300 filters the air flow to at least partially trap impurities entrained in the air flow. Then, the air flow continues toward the drive motor 220. The movement of the drive motor 220 by operation reduces the air pressure within the air path, and the resulting pressure differential creates an air flow. Thus, the air pressure within the wind tunnel 200 is substantially less than ambient air pressure.

The filter 300 may be any suitable type of filtration device, including but not limited to HEPA or HEPA type filtration devices.

In a second state, shown in fig. 6, the actuator 150 drives the valve 140 to move from the first position to the second position such that the first chamber 112 is in fluid communication with ambient air at the first opening 111. Since the air pressure within the first chamber 112 is substantially less than the air pressure of the ambient air, the pressure differential will create an air flow into the first chamber 112 through the first opening 111. These air streams will flow in the directions indicated by arrows B1 and B2. At least a portion of the air flow will impinge upon filter 300 so as to at least partially carry impurities trapped by filter 300 away from filter 300. The impurities will tend to move downward and out of the filter 300 under the influence of gravity and the air flow. Thus, the operation of the dust removing device 100 of the present application at least partially removes the foreign substances in the filter 300.

The dust removing device 100 may be coupled to a controller, not shown. For example, the actuator 150 may be electrically connected to a controller and selectively actuated. The actuator 150 may have different modes of actuation including, but not limited to, timed actuation, actuation after a predetermined time of operation, actuation when a pressure differential in the air chute 200 reaches a predetermined value, and the like. By removing impurities from the filter, the life of the filter is extended, the frequency of replacement is reduced, and better user experience is provided.

The dust removal device and the dust collector have the advantages of simple structure, reliability in operation, easiness in implementation and the like. Through adopting dust collector and dust catcher of this application, the impurity in the filter will be effectively clear away to life has been prolonged.

This written description discloses the application with reference to the drawings and also enables one of ordinary skill in the art to practice the application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the claims and encompasses other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of protection defined by the claims as long as they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims

1. A dust removing device characterized by comprising:

a first housing (110) comprising a first opening (111) and a first cavity (112) therein;

a second housing (120) including a second cavity (122) therein;

a valve (140) with a first side (141) movably mounted in the first opening (111) and a second side (142) facing the second chamber (122), wherein the valve (140) has at least a first position in which the valve (140) closes the first opening (111) and a second position in which the valve (140) opens the first opening (111), whereby the first chamber (112) is in fluid communication with ambient air;

a channel (130) configured to bring the first cavity (112) into fluid communication with the second cavity (122) at least when the valve (140) is in a first position such that fluid pressure is equalized at the first side (141) and the second side (142) of the valve (140); and

an actuator (150) coupled with the valve (140) and configured to selectively drive the valve (140) such that the valve (140) moves between the first position and the second position.

2. A dusting apparatus according to claim 1, characterized in that said channel (130) is arranged in said valve (140) and extends from said first side (141) to said second side (142).

3. A dusting device according to claim 1, wherein said passage (130) is arranged in a duct positioned outside said valve (140), and a duct extends from said first housing (110) to said second housing (120), such that said first cavity (112) and said second cavity (122) are in fluid communication through said duct.

4. A dusting device according to claim 1, characterized in that a seal (170) is arranged between the valve (140) and the second housing (120) to prevent ambient air from entering the second chamber (122) through between the valve (140) and the second housing (120).

5. The dusting apparatus according to claim 2, characterized in that the actuator (150) is arranged inside the second chamber (122) and the valve (140) is carried by a rod (160).

6. The dusting apparatus according to claim 5, characterized in that the channel (130) is arranged along the circumference of the rod (160).

7. The dusting device according to any of the claims 1-6, characterized in that the second housing (120) is fixed to the first housing (110) by a plurality of bearings (180), and that the first housing (110) and the second housing (120) are spaced apart by a gap (190), the first opening (111) being positioned towards the gap (190).

8. A vacuum cleaner, comprising:

a plenum (200) in fluid communication with the first cavity (112);

a filter (300) installed in the air duct (200); and

the dust extraction device (100) according to any of claims 1-7, wherein the first opening (111) is oriented towards the filter (300).

9. The vacuum cleaner according to claim 8, wherein the filter (300) is positioned to be placed horizontally and the valve (140) is oriented to move in a vertical direction.

10. The vacuum cleaner of claim 8, wherein the actuator (150) is configured to actuate in accordance with one or more of the following conditions: the first predetermined time has elapsed, the vacuum cleaner has been operated for a second predetermined time, and the pressure difference in the air duct (200) reaches a predetermined value.