JP2003079545A - Dust collector and electric vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vacuum cleaner capable of easily removing dust accumulated in a dust cup. SOLUTION: A bottom face opening part 13 of the dust cup 14 blocked by a bottom face part 12 is opened and closed by an operation of an operating part 37 of a lever 35 of a handle part 34 provided in an outer side face of the dust cup 14. Suction air is passed through the dust cup 14 and dust sucked with the suction air is collected inside the dust cup 14. When dust is accumulated in the dust cup 14, the operating part 37 of the lever 35 is operated and the bottom face opening part 13 of the dust cup 14 is opened. The dust accumulated in the dust cup 14 can be easily removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting device for collecting dust sucked together with passing intake air and an electric vacuum cleaner equipped with the dust collecting device.

[0002]

2. Description of the Related Art Conventionally, in a so-called cyclone type electric vacuum cleaner, a main body suction port is opened on a front surface of a cleaner main body of the electric vacuum cleaner. Also, inside the vacuum cleaner body,
An electric blower that sucks air together with dust from the main body suction port is housed. A dust collector for collecting dust sucked from the main body suction port is provided inside the cleaner main body between the electric blower and the main body suction port.

This dust collecting device collects dust that has been sucked together with intake air produced by an electric blower, and is a bottomed cylindrical dust collecting cup having an opening at its upper end and an opening. Have A filter is detachably attached to the opening of the dust cup as a lid for trapping the dust that cannot be separated by the cyclone method and is sucked into the dust cup together with the intake air.

The dust sucked together with the intake air sucked from the suction port of the main body of the vacuum cleaner is collected in the dust cup, and the fine dust not collected in the dust cup passes through the filter. At this time, it is captured by this filter.

[0005]

However, in the above electric vacuum cleaner, when the dust cup is removed from the cleaner body and the dust collected in the dust cup is discarded through the opening, the filter is opened through the opening. Since it has to be removed, it is not easy to remove the dust inside the dust cup. Further, when removing the lid from the opening of the dust cup, there is a problem that a part of the dust collected in the dust cup is likely to fly up.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a dust collecting device capable of easily removing dust accumulated in the dust collecting cup, and an electric vacuum cleaner having the dust collecting device. And

[0007]

According to a first aspect of the present invention, there is provided a dust collector which collects dust sucked together with passing intake air, the dust collector having a substantially cylindrical shape with upper and lower ends opened. A dust cup, a lid body that opens and closes the open lower end of the dust collection cup, a grip portion provided on the outer side surface of the dust collection cup, and a grip portion provided on the grip portion and closed by the lid body. And a lever for opening the lower end of the dust collecting cup.

Then, the lower end of the dust collecting cup closed by the lid is opened and closed by the lever of the grip provided on the outer side surface of the dust collecting cup. Therefore, when the intake air is passed through the dust collecting cup and the dust sucked together with the intake air is accumulated in the dust collecting cup, the lower end of the dust collecting cup closed by the lid is cleaned, for example. The dust accumulated in the dust collecting cup can be easily removed by opening the lever provided on the grip portion that is gripped by the user when the dust collecting cup is detached from the machine body.

According to a second aspect of the present invention, there is provided the dust collector of the first aspect, wherein the inner surface of the dust collecting cup does not have a protruding portion, and the lid body is the lid body. When the lower end of the dust collecting cup is closed, it is provided with an airtight means that abuts the lower end edge of the dust collecting cup to make the lower end of the dust collecting cup airtight.

Further, when the lower end of the dust collecting cup is closed by the lid, the lid is provided with an airtight means for contacting the lower edge of the dust collecting cup to make the lower end of the dust collecting cup airtight. This allows the intake air to pass through the dust collection cup and prevents the intake air from leaking between the dust collection cup and the lid when collecting the dust sucked together with the intake air into the dust collection cup. It can be prevented. In addition, when the lower end of the dust collecting cup closed by the lid is opened by the lever, there is no protrusion on the inner surface of the dust collecting cup. Since it is hard to get caught, it is possible to more reliably remove the dust collected in the dust collecting cup.

According to a third aspect of the present invention, in the dust collector of the first or second aspect, the lever is moved from the dust collecting cup side toward the grip portion side and the lower end of the dust collecting cup is covered. The body is opened, and the distance between the lever and the grip portion is longer than the distance between the lever and the grip portion.

Then, the distance between the lever and the grip is
By making the distance longer than the distance between the lever and the dust collecting cup, it becomes easier for the hand to enter between the lever and the grip when the grip is gripped. For this reason, since a hand does not enter carelessly between the lever and the dust collecting cup, erroneous operation of moving the lever toward the grip portion is prevented when the dust collecting cup is removed from the cleaner body. Therefore, an erroneous operation of opening the lower end of the dust collecting cup with the lid can be prevented.

An electric vacuum cleaner according to a fourth aspect comprises the dust collector according to any one of the first to third aspects, and an electric blower for blowing intake air to the dust collector.

Since the electric blower blows the intake air to the dust collector according to any one of claims 1 to 3, it has the same operation as that of the dust collector according to any one of claims 1 to 3.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an electric vacuum cleaner of the present invention will be described below with reference to FIGS. 1 to 4.

1 to 4, reference numeral 1 denotes a cleaner body, and the cleaner body 1 is a cyclone type and can run on a floor surface. In addition, the cleaner body 1 includes a case body 2
And a main body case 4 having a lid 3 connected to the upper part of the case body 2 and attached to cover the upper part of the case body 2 so as to be openable by rotation. Further, an electric blower 5 which is an electric section is housed on the rear side in the case body 2.

A battery as a power source (not shown), that is, a battery pack is detachably housed in the main body case 4 on the front side of the electric blower 5. Further, a charging terminal (not shown) for supplying electric power to the battery pack to charge the battery pack is attached substantially in the center of the rear surface of the case body 2 of the main body case 4.

Further, a pair of side plate portions 6 is arranged on both sides of the case body 2 so as to project upward.
The pair of side plate portions 6 are curved inward so that the facing distance on the front side of the substantially middle portion in the vertical direction becomes gradually smaller.
A plurality of exhaust ports 7 that communicate with the electric blower 5 and open toward the front side are formed in the curved front portion of each of the pair of side plate portions 6.

On the front side of the lid 3 of the main body case 4,
The main body suction port 8 is opened toward the front. The main body suction port 8 communicates with a dust collector 11 that is detachably attached to the front side of the case body 2 of the main body case 4.

The dust collector 11 is provided with the electric blower 5
After the intake air sucked in is taken in, it is exhausted, that is, passes, and the dust sucked together with the passing intake air is collected. Further, in this dust collecting device 11, a suction / discharge port 12 as an opening is opened at an upper end as one end in the axial direction, and a bottom face opening 13 is provided at a lower end as the other end in the axial direction facing the suction / discharge port 12. A dust cup 14 is provided as a cylindrical dust collecting cup having an opening.

The dust cup 14 is made of synthetic resin and is formed in a cylindrical shape extending from the upper edge to the lower edge along the axial direction of the dust cup 14. Further, the outer peripheral surface and the inner peripheral surface of the dust cup 14 are formed in a smooth curved surface shape, and no protrusions or edges are formed.

Further, the suction / discharge port 12 of the dust cup 14
A synthetic resin wind direction control unit 15 for controlling the wind direction of the intake air sucked from the intake / exhaust port 12 is detachably attached to the. A dust collection filter 16 that captures dust in the intake air exhausted from the dust cup 14 and collects the dust in the intake air to the dust cup 14 is detachably attached to a part of the wind direction control unit 15. Has been. The dust collecting filter 16 is made of synthetic resin and has an entire surface formed in a mesh shape. The dust collecting filter 16 is formed in a shape in which a disk having the same inner diameter as the wind direction control unit 15 is divided by a straight line.

In addition, between the dust collecting filter 16 in the wind direction control section 15, an intake cylinder section 18 having a lower end opening an intake opening 17 toward the side along the tangential direction of the dust cup 14 is provided. ing. When the dust cup 14 is attached to the cleaner body 1, the intake cylinder portion 18 communicates with the main body suction port 8 and sucks the intake air sucked from the main body suction port 8 into the dust cup 14.

On the other hand, on the outer peripheral edge of the bottom opening 13 of the dust cup 14, a hinge portion provided on the outer peripheral edge of the bottom 21 as a substantially disk-shaped lid for closing the bottom opening 13 in an openable and closable manner. 22 is installed. As a result, the bottom portion 21 is
The hinge portion 22 is rotatably attached to the outer peripheral surface of the dust cup 14, and opens and closes the bottom opening 13 of the dust cup 14. Further, the bottom surface portion 21 has an outer diameter dimension substantially equal to the outer diameter dimension of the dust cup 14, and is made of the same synthetic resin as the dust cup 14.

A groove portion 23 is formed along the circumferential direction of the bottom surface portion 21 at the peripheral edge of the upper end surface of the bottom surface portion 21. A packing 24, which is a sealing material as an annular airtight means, is attached to the groove 23. When the packing 24 closes the bottom opening 13 of the dust cup 14 at the bottom 21, the packing 24 abuts on the opening edge of the bottom opening 13 to provide airtightness between the bottom opening 13 and the bottom 21. Secure.

Further, on the outer peripheral edge of the bottom face portion 21 facing the hinge portion 22, a first engaging body 25 as an engaging means projecting in a direction along the axial direction which is the upper side of the bottom face portion 21. Is attached. A first engaging claw portion 26, whose upper side surface is inclined downward toward the distal end, is integrally provided on the outer surface in the upper end region which is the distal end region of the first engaging body 25. There is.

On the other hand, on the outer side surface of the dust cup 14, an upper end portion 32 as one end of a substantially rod-shaped grip portion 31 that is gripped by a user when the dust collector 11 is detached or attached from the cleaner body 1, that is, a grip portion 31. Is continuously provided on the outer peripheral surface of the upper end, and a lower end 33 as the other end of the grip portion 31 is integrally provided with a substantially U-shaped handle portion 34 as a grip portion continuously provided on the outer peripheral surface of the lower end. It is provided. At the lower end 33 of the handle portion 34, there is provided a lever 35 which is a second engaging body as an engaging means for opening the bottom opening 13 of the dust cup 14 closed by the bottom 21 so as to be opened and closed. , This lower end
It is mounted slidably in the longitudinal direction of 33.

The lever 35 has a lower end portion 33 of the handle portion 34.
The operation portion 37 is provided so as to protrude upward from the operation concave portion 36 opened on the upper end surface of the. A second engaging claw portion 38, which projects toward the dust cup 14 side and whose lower end surface is inclined upward toward the tip, is integrally attached to the lower end of the operation portion 37. Further, the outer surface of the operating portion 37 facing the second engaging claw portion 38 serves as a biasing means for elastically biasing the operating portion 37 from the grip portion toward the dust cup 14 side. A spring 39, which is an elastic body, is attached.

As a result, by moving the operating portion 37 of the lever 35 in the operating recess 36 of the handle portion 34 from the outer surface side of the dust cup 14 toward the grip portion 31 side of the handle portion 34, the lever 35 is moved. The second engagement claw portion 38 moves from the outer surface side of the dust cup 14 toward the grip portion 31 side of the handle portion 34, and the second engagement claw portion 38 and the first engagement body 25 The engagement with the first engaging claw portion 26 is released, and the bottom portion opening 13 of the dust cup 14 closed by the bottom portion 21 is opened by the rotation of the hinge portion 22 due to the weight of the bottom portion 21.

Here, the bottom surface portion 21 is brought into contact with the bottom surface opening portion 13 of the dust cup 14, and the first engaging body 25 of the bottom surface portion 21 is brought into contact.
When the first engaging claw portion 26 of the lever 35 is engaged with the second engaging claw portion 38 of the lever 35 and the lever 35 is biased by the spring 39, the operating portion 37 of the lever 35 and the dust cup The distance of the lower end portion 33 of the handle portion 34 between the outer side surface of the handle 14, that is, the length A, is determined by the operation portion 37 of the lever 35 and the handle portion 34.
The lower end portion 33 of the handle portion 34 between the grip portion 31 and
Is longer than the distance B, that is, the length B.

Further, the operating portion 37 of the lever 35 and the dust cup
The length A of the lower end portion 33 of the handle portion 34 between the outer peripheral surface of the handle 14 and the outer peripheral surface of the handle portion 14 has such a length that the fingers of the user's hand enter when the grip portion 31 of the handle portion 34 is gripped. . Further, the length B of the lower end portion 33 of the handle portion 34 between the operation portion 37 of the lever 35 and the grip portion 31 of the handle portion 34 is determined by the user's finger,
For example, it has a length that allows one little finger to enter.

On the other hand, in the main body suction port 8 of the main body 1 of the vacuum cleaner,
The base end of the flexible hose body 41 is communicated and detachably connected. At the tip of the hose body 41, there is provided a hand operation section 42 as an operation means which is bent in a substantially V shape. A plurality of setting buttons 43 for setting the operation mode of the electric blower 5 and the like are provided on the part of the hand operation part 42 facing the base end side of the bent part. Also,
At the tip of the hand operation part 42 of the hose body 41, a suction port body 45 which is a nozzle body is provided through an extension pipe 44 as an expandable and contractible connection pipe.
Is detachably connected and connected.

Next, the operation of the above-described embodiment will be described.

First, the first engagement claw portion 26 of the first engagement body 25 of the bottom surface portion 21 is engaged with the second engagement claw portion 38 of the lever 35 of the handle portion 34.

Next, after the dust collecting filter 16 is attached to the wind direction control unit 15, the wind direction control unit 15 is attached to the suction / discharge port 12 of the dust cup 14 to assemble the dust collecting apparatus 11.

The lower part of the dust collector 11 is housed in the case body 2, and the upper part of the dust collector 11 is covered with the lid 3.
Then, the dust collector 11 is mounted on the main body case 4 so as to be sandwiched between the lid body 3 and the case body 2.

At this time, the upper end of the intake cylinder 18 of the wind direction controller 15 is communicated with the main body intake port 8.

Further, the base end of the hose body 41 is fitted into the main body suction port 8 of the cleaner body 1, and the hand operating portion of the hose body 41 is fitted.
An extension pipe 44 fitted with a suction port body 45, a gap nozzle (not shown), and the like are fitted to the tip of 42.

Next, one of the setting buttons 43 of the hand operation unit 42 is turned on to drive the electric blower 5 of the cleaner body 1. Then, air is sucked together with dust from the suction port body 45 or the gap nozzle.

The air containing dust becomes intake air, passes through the inside of the extension tube 44 and the hose body 41, and is sucked into the main body suction port 8 of the cleaner main body 1, and then the suction device 11 sucks the dust. Intake is made into the cylinder section 18.

The intake air sucked into the intake cylinder portion 18 is sent from the intake cylinder portion 18 into the dust cup 14 and is rotated in a spiral shape in the dust cup 14, and then the dust collecting filter. After passing through 16 and being sucked into the electric blower 5,
The electric blower 5 exhausts air to the exhaust port 7 of the cleaner body 1.

At this time, when the intake air sucked into the dust cup 14 passes through the dust collecting filter 16, the dust sucked together with the intake air is captured.

Further, when dust-like dust is accumulated in the dust cup 14, the lid body 3 of the main body case 4 is rotated with respect to the case body 2 and the case body 2 and the lid body 3 are rotated.
Remove the dust collector 11 from between.

While holding the grip 31 of the handle 34 of the dust collector 11 and lifting the dust collector 11, the lever 35 of the lower end 33 of the handle 34 is gripped with a little finger or the like. Move to section 31 side.

Then, the second engaging claw portion 38 of the lever 35 moves toward the grip portion 31, and the second engaging claw portion 38 causes the first engaging claw of the first engaging body 25 to move. The engagement with the portion 26 is released.

Therefore, the hinge portion 22 is attached to the bottom portion 21 by its own weight.
The bottom surface portion 21 is rotated via, and the bottom surface opening portion 13 of the dust cup 14 is opened.

As a result, the dust accumulated in the dust cup 14 falls downward from the bottom opening 13 of the dust cup 14 by its own weight.

Thereafter, the first engaging claw portion 26 of the bottom surface portion 21 is engaged with the second engaging claw portion 38 of the lever 35, and the dust cup
After closing the bottom opening 13 of 14, the dust collector 11 is attached between the case body 2 and the lid body 3 of the main body case 4.

As described above, according to the above-described embodiment, the grip portion 31 of the handle portion 34 of the dust collector 11 is gripped and lifted by the user, and the lever 35 of the handle portion 34 of the dust collector 11 is lifted. When a little finger is hung on and the lever 35 is moved to the grip portion 31 side, the bottom opening 13 of the dust cup 14 opens and the dust collected in the dust cup 14 falls downward due to its own weight. .

Therefore, the dust collected in the dust collector 11 removed from the cleaner body 1 can be discarded with only one hand without using both hands, so that the dust cup of this dust collector 11 can be kept clean. Since the dust collected inside 14 can be easily removed, the usability of dust collector 11 can be improved.

The bottom opening 13 of the dust cup 14
When the bottom part 21 is closed by the bottom part 21, the packing 24 attached to the groove part 23 of the bottom part 21 becomes the bottom opening part 13 of the dust cup 14.
Abutting the opening edge of. Therefore, the packing 24 can ensure the airtightness between the bottom opening 13 and the bottom 21 of the dust cup 14.

Therefore, with the dust collector 11 sandwiched between the case body 2 and the lid body 3 of the main body case 4, the electric blower 5 is driven to move the dust collector 11 into the dust cup 14 of the dust collector 11. It is possible to prevent the intake air and the dust from leaking between the bottom opening 13 and the bottom 21 of the dust cup 14 when the intake air is taken.

Further, by making the dust cup 14 of the dust collector 11 into a cylindrical shape along the axial direction, the dust collected in the dust cup 14 is unlikely to be caught on the inner peripheral surface of the dust cup 14. Therefore, when the bottom surface opening 13 of the dust cup 14 is opened, the dust collected in the dust cup 14 can be more reliably removed from the dust cup 14.

Then, the operating portion 37 of the lever 35 is set to the handle portion.
When the dust cup 14 is moved toward the grip 31 side,
With the bottom opening 13 of the lever open, and with the first engaging claw 26 of the bottom 21 engaged with the second engaging claw 38 of the lever 35, the operating portion 37 of the lever 35 is The length A of the lower end portion 33 between the dust cup 14 and the dust cup 14 is longer than the length B of the lower end portion 33 between the operating portion 37 of the lever 35 and the grip portion 31 of the handle portion 34, and The length is such that the fingers of the user's hand enter when the grip portion 31 of the handle portion 34 is gripped.

As a result, when the user grips the grip portion 31 of the handle portion 34, the user's hand easily enters between the lever 35 and the grip portion 31. Therefore, the hand does not enter carelessly between the lever 35 and the dust cup 14,
It is possible to prevent an erroneous operation of moving the operation portion 37 of the lever 35 toward the grip portion 31 side of the handle portion 34 when the dust cup 14 is removed from the cleaner body 1 or the like. Therefore, the bottom part
It is possible to prevent an erroneous operation of opening the bottom opening 13 of the dust cup 14 closed by 21.

Further, the operating portion 37 of the lever 35 and the handle portion 34
By setting the length B of the lower end portion 33 between the grip portion 31 and the grip portion 31 to be such that one little finger of the user can enter, the operation portion 37 of the lever 35 and the grip portion 31 of the handle portion 34 are separated. In the meantime, it is possible to further prevent the user's finger from unknowingly entering. Therefore, it is possible to further prevent an erroneous operation in which the operating portion 37 of the lever 35 is moved toward the grip portion 31 side of the handle portion 34, and thus it is possible to further prevent an erroneous operation in which the bottom opening 13 of the dust cup 14 is opened, and the dust cup It is possible to prevent the dust accumulated inside 14 from accidentally falling.

Further, the upper and lower ends of the grip portion 31 of the handle portion 34 are dust cups by the upper end portion 32 and the lower end portion 33.
Since it is connected to the outer peripheral surface of 14, the strength of the grip portion 31 of the handle portion 34 with respect to the dust cup 14 is higher than that when only the upper end of the grip portion 31 of the handle portion 34 is connected to the outer peripheral surface of the dust cup 14. Can be improved.

In the above embodiment, if the operating portion 37 of the lever 35 is moved to the grip portion 31 side of the handle portion 34,
The engagement of the bottom surface portion 21 with the first engagement hook portion 26 by the second engagement hook portion 38 is always released, and the bottom opening portion of the dust cup 14 is opened.
Although 13 is opened, the lever 35 may be provided with a lever lock mechanism (not shown) for preventing erroneous operation of the lever 35. And this lever lock mechanism
By providing the lever 35, it is possible to reliably prevent the erroneous operation of the lever 35.

Further, although the dust cup 14 of the dust collector 11 is formed into a cylindrical shape along the axial direction, the dust cup 14 is gradually cut out, that is, expanded as it goes downward which is one end in the axial direction. By making the diameter tapered, when the dust collected in the dust cup 14 is discarded, the dust is less likely to be caught on the inner side surface of the dust cup 14, so that the dust collected in the dust cup 14 It can be removed more reliably.

[0060]

According to the dust collecting apparatus of the first aspect, the lower end of the dust collecting cup closed by the lid can be opened and closed by the lever of the grip provided on the outer surface of the dust collecting cup. Therefore, when the intake air is passed through the dust collecting cup and the dust sucked together with the intake air is collected in the dust collecting cup, the lower end of the dust collecting cup closed by the lid is, for example, a cleaner. The dust accumulated in the dust collecting cup can be easily removed by opening it with a lever provided on a grip portion which is gripped by the user when detaching from the main body.

According to the dust collecting apparatus of the second aspect, in addition to the effect of the dust collecting apparatus of the first aspect, when the lower end of the dust collecting cup is closed by the lid, the lower edge of the dust collecting cup is closed. Since the airtight means makes the lower end of this dust collecting cup airtight by contacting the
It is possible to prevent the intake air from leaking between the dust collection cup and the lid when the intake air passes through the dust collection cup.
Since there is no protrusion on the inner surface of the dust collecting cup, it is difficult for the dust collected in the dust collecting cup to get caught in the dust collecting cup.
The dust in the dust collecting cup can be removed more reliably.

According to the dust collecting apparatus of the third aspect, in addition to the effect of the dust collecting apparatus of the first or second aspect, the distance between the lever and the grip portion is set to be between the lever and the dust collecting cup. When the grip is longer than the distance, it is easy for the hand to get between the lever and the grip when gripping the grip, so the hand does not enter carelessly between the lever and the dust collecting cup. When removing the cup from the vacuum cleaner body, it is possible to prevent erroneous operation of moving the lever toward the grip,
It is possible to prevent an erroneous operation of opening the lower end of the dust collecting cup with the lid.

According to the electric vacuum cleaner of claim 4, since the electric blower blows the intake air to the dust collector of any one of claims 1 to 3, the dust collector of any one of claims 1 to 3 is used. The same effect as can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a dust collector for an electric vacuum cleaner according to the present invention.

FIG. 2 is a side view in which a part of the above dust collector is cut away.

FIG. 3 is a side view showing a state in which the bottom of the dust collector is opened.

FIG. 4 is a perspective view showing the same electric vacuum cleaner.

[Explanation of symbols]

5 electric blower 11 Dust collector 14 Dust cup as a dust collecting cup 21 Bottom part as a lid 24 Packing as airtight means 34 Handle part as a grip part 35 lever

Claims (4)

[Claims] 1. A dust collector that collects dust that has been sucked in together with passing intake air, the dust collecting cup having a substantially cylindrical shape having an upper end and a lower end opened, and the opened lower end of the dust collecting cup being opened and closed. A lid that closes as much as possible, a grip provided on the outer surface of the dust collection cup, and a lever that is provided on the grip and that opens the lower end of the dust collection cup closed by the lid. A dust collecting device characterized by being provided. 2. The dust collecting cup has a planar shape whose inner surface does not have a protruding portion, and the lid body has a lower end edge of the dust collecting cup when the lower end of the dust collecting cup is closed by the lid body. 2. The dust collecting apparatus according to claim 1, further comprising an airtight means that abuts against the airtight portion to make the lower end of the dust collecting cup airtight. 3. The lever is moved from the dust collecting cup side toward the grip portion side so that the lower end of the dust collecting cup is opened by a lid, and the distance between the lever and the grip portion is The length is longer than the distance between the lever and the grip portion.
Or the dust collector according to 2. 4. An electric vacuum cleaner comprising: the dust collector according to claim 1; and an electric blower for blowing intake air to the dust collector.