WO2022181031A1

WO2022181031A1 - Work machine

Info

Publication number: WO2022181031A1
Application number: PCT/JP2021/048088
Authority: WO
Inventors: 直人一橋; 完坪和
Original assignee: 工機ホールディングス株式会社
Priority date: 2021-02-26
Filing date: 2021-12-24
Publication date: 2022-09-01
Also published as: JPWO2022181031A1

Abstract

In order to enhance working efficiency in a work machine, the present invention has a fan accommodating part 30 for accommodating a fan motor 10, a first cyclone part 28 through the inside of which indrawn air circles, a second cyclone part 29 through the inside of which air flowing out from the first cyclone part 28 circles, and a filter accommodating space 22 in which a filter member is provided. The filter accommodating chamber 22 is provided with a fan motor intake port 21, a second cyclone exhaust port 16, a first filter member 18 disposed so as to block an air flow channel from the second cyclone exhaust port 16 to the fan motor intake port 21, and a second filter member 19 disposed further upstream than the first filter member 18. A space is formed between the second filter member 19 and the second cyclone exhaust port 16.

Description

work machine

The present invention relates to a working machine such as a cleaner.

A cleaner provided with a cyclone unit for centrifugally separating and collecting dust from air containing dust is known as an example of a working machine. In such a cleaner, a filter member for filtering the air that has passed through the cyclone unit is provided in front of the motor and the fan in order to prevent dust that has passed through the cyclone unit from entering the motor.

Japanese Patent Laid-Open No. 2002-100001 describes a cleaner having a filter member positioned upstream of a motor or a fan.

JP 2020-178976 A

Like the cleaner described in Patent Document 1, in a structure in which a filter member is provided only at a position in front of a motor or a fan, for example, gypsum dust has a relatively large particle size and When dust that easily sticks is sucked, the filter member may quickly become clogged. As a result, the suction force is reduced early, and the maintenance frequency of the filter member is increased, resulting in poor workability of the cleaner.

SUMMARY OF THE INVENTION An object of the present invention is to provide a working machine with improved workability.

A work machine according to one embodiment includes a fan accommodating section that accommodates a fan rotated by a motor, a first cyclone section in which an air flow sucked by the rotation of the fan circulates, and A second cyclone section in which the air flow discharged from the first cyclone section swirls; and a filter housing section that connects the second cyclone section and the fan housing section and houses a filter section therein. and the filter accommodating portion has an outlet opening in a direction along the axis, through which air flows out to the fan accommodating portion, and an inlet through which air flows in from the second cyclone portion, The filter unit comprises a first filter member arranged to block an air flow path from the inflow port to the outflow port, and arranged upstream of the flow channel from the first filter member, and a second filter member having higher air permeability than the first filter member, and a space is formed between the second filter member and the inlet.

ADVANTAGE OF THE INVENTION According to this invention, the improvement of the workability|operativity in a working machine can be aimed at.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows the cleaner which is an example of the working machine of embodiment of this invention. FIG. 2 is a vertical cross-sectional view of the cleaner shown in FIG. 1 ; 2 is an enlarged partial cross-sectional view showing airflow in the cleaner shown in FIG. 1; FIG. FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1; FIG. 2 is a cross-sectional view taken along line BB shown in FIG. 1; FIG. 2 is a cross-sectional view taken along line CC shown in FIG. 1; FIG. 2 is a perspective view showing a structure of the cleaner shown in FIG. 1 with the first filter member, the second filter member and the dust collection part removed from the main body; FIG. 2 is a cross-sectional view of the cleaner of the first modified example of the present invention taken along line CC of FIG. 1; FIG. 9 is a perspective view showing a state where the second filter member of the cleaner shown in FIG. 8 is attached to the first filter member; FIG. 11 is an enlarged partial cross-sectional view showing the airflow in the cleaner of the second modified example of the present invention;

A work machine according to the present embodiment will be described with reference to the drawings.

In this embodiment, the cleaner 1 will be described as an example of the working machine. An example of a cleaner 1 is shown in FIGS. 1-7. The same or equivalent elements shown in each figure are given the same reference numerals.

The cleaner 1 of this embodiment shown in FIG. The body portion 2 includes a housing 6 that accommodates the fan motor 10 shown in FIG. 2 and a grip portion 4 for handling connected to the housing 6 . The fan motor 10 is a motor having a rotating shaft to which a fan is attached, and is provided in a fan accommodating portion 30 inside the housing 6 . A battery 5 is detachably attached to the holding portion of the housing 6 as a battery for supplying electric power to the fan motor 10 . A plurality of body exhaust ports 20 are formed in the housing 6 in the vicinity of the holding portion of the battery 5 to exhaust the sucked air. Further, the grip portion 4 is provided with an operation portion 9 in which a switch for turning ON/OFF the power of the cleaner 1 is arranged.

The cleaner 1 also includes a dust collecting portion 3 attached to the housing 6 and a dust accommodating member 7 attached to the dust collecting portion 3 and capable of accommodating dust sucked in together with air. Further, inside the dust collecting section 3, a first cyclone section 28 shown in FIG. A plurality of second cyclone units 29 are provided for separating unseparated dust from the air by centrifugal force. In addition, as shown in FIG. 4 , a plurality of second cyclone portions 29 are provided along the circumferential direction R outside the first cyclone portion 28 . In the first cyclone section 28, an air flow, which is a flow of air sucked by the rotation of the fan, swirls inside. On the other hand, in the second cyclone section 29, the air flow that has flowed out from the first cyclone section 28 swirls inside. That is, the cleaner 1 of the present embodiment is a two-stage cyclone working machine.

Therefore, when the operator turns on the switch of the operation unit 9, the fan motor 10 rotates, and the rotation of the fan motor 10 causes air and dust to pass through the dust collection unit intake port 8 formed near the tip of the cleaner 1. inhale. Then, the sucked air and dust are swirled in the tubular first cyclone portion 28 and separated by centrifugal force. Further, the air enters the plurality of tubular second cyclone portions 29, and is swirled in each of the plurality of second cyclone portions 29, so that the dust that has not been completely separated in the first cyclone portion 28 is removed from the air by centrifugal force. To separate. After that, the air passes through the inside of the housing 6 and is exhausted to the outside from the plurality of body exhaust ports 20 .

In the cleaner 1, the first cyclone exhaust port 12, which is the exhaust port of the first cyclone section 28 shown in FIG. An air flow path is formed so that and communicate with each other. Furthermore, as shown in FIG. 2, the air flow is made so that the second cyclone outlet 16, which is the outlet of the second cyclone section 29, and the fan motor inlet 21, which is the inlet of the fan motor 10, communicate with each other. A path is formed.

In addition, the cleaner 1 of the present embodiment includes a filter housing chamber (filter housing portion) 22 to which the fan motor intake port 21 and the second cyclone exhaust port 16 serving as the exhaust port of the second cyclone portion 29 are connected. have. In other words, the filter accommodation chamber 22 is provided between the second cyclone portion 29 and the fan accommodation portion 30 . Specifically, the second cyclone portion 29 and the fan accommodating portion 30 are connected to each other, and the filter accommodating chamber 22 for accommodating the filter portion 31 shown in FIG. 3 is provided inside.

A first filter member 18 and a second filter member 19 arranged so as to cover the outer peripheral portion of the first filter member 18 are provided in the filter portion 31 inside the filter housing chamber 22 . Specifically, the second filter member 19 is arranged on the upstream side of the air flow path from the first filter member 18 .

In the cleaner 1, as shown in FIG. 2, the fan motor 10 rotates to suck in air and dust through the dust collecting section intake port 8 formed near the tip of the cleaner 1. As shown in FIG. Then, the sucked air and dust become an air flow P1 and enter the first cyclone section 28 as shown in FIGS. A cylindrical mesh filter 13 is provided in the first cyclone section 28 along an axis (center line) Q, and an airflow P2 containing dust revolves around the mesh filter 13 . Air and dust are separated by the centrifugal force generated when the airflow P2 swirls, and the separated dust is stored in the first cyclone dust collection chamber 14 . After that, the air flow P3 that has passed through the mesh filter 13 advances as an air flow P4 through the first cyclone exhaust port 12 as shown in FIG. It enters each of the plurality of second cyclone portions 29 through the port 15 .

Then, as shown in FIGS. 3 and 5, each of the plurality of second cyclone portions 29 turns into an air flow P5 and swirls. A centrifugal force is generated by turning the air flow P5 in each of the second cyclone portions 29, and the dust that has not been separated by the first cyclone portion 28 is separated from the air by this centrifugal force. The dust separated by the second cyclone section 29 is stored in the second cyclone dust collection chamber 17 shown in FIG. After that, the air becomes an air flow P6 and enters the filter section 31 inside the filter housing chamber 22 via the second cyclone exhaust port (inflow port) 16 . The air entering the inside of the filter housing chamber 22 passes through the second filter member 19 as an air flow P7 and then passes through the first filter member 18 as an air flow P8. After passing through the first filter member 18 , the air becomes an air flow P 9 and enters the fan accommodating portion 30 in the housing 6 via the fan motor inlet (outlet) 21 . The air that has entered the fan accommodating portion 30 becomes an air flow P10, passes through the fan motor 10, and is then exhausted to the outside of the cleaner 1 through the plurality of main body exhaust ports 20 shown in FIG.

Next, the filter housing chamber 22 provided in the cleaner 1 will be described in detail. As shown in FIG. 3, the filter housing chamber 22, which is the filter housing portion, opens in the first direction (opening direction) X, and has an outlet (outlet) through which the air flow flows out toward the fan housing portion 30. 21 and a plurality of inlets (second cyclone outlets) 16 into which the air flows from the second cyclone section 29 . The first direction X is the front-rear direction of the cleaner 1 shown in FIG. That is, both the outflow port 21 and the inflow port 16 are opened along the axis Q. As shown in FIG.

In addition, in the filter portion 31 of the filter housing chamber 22 , a first filter member 18 is disposed so as to block the flow path of the air flow from the inlet 16 to the outlet 21 , and the flow path is larger than the first filter member 18 . and a second filter member 19 arranged upstream of the first filter member 18 and having higher air permeability than the first filter member 18 . In other words, the second filter member 19 is coarser than the first filter member 18 . Furthermore, in other words, the pore diameters of the plurality of pores provided in the second filter member 19 are larger than the pore diameters of the plurality of pores provided in the first filter member 18 . Therefore, the second filter member 19 is formed so that the dust particle collection efficiency of the second filter member 19 is lower than the dust particle collection efficiency of the first filter member 18 . Note that the first filter member 18 is formed in a tubular shape centered on an axis Q extending in the first direction X shown in FIG. Furthermore, the first filter member 18 also communicates with the inflow port (second cyclone exhaust port) 16 . On the other hand, the second filter member 19 is also formed in a tubular shape centered on the axis Q. As shown in FIG. That is, as shown in FIG. 7, both the first filter member 18 and the second filter member 19 are formed in a tubular shape. Here, the first filter member 18 is, for example, a HEPA filter made of nonwoven fabric, and the second filter member 19 is made of, for example, sponge. A sponge consists of resin, such as a polyurethane, as an example.

Moreover, in the filter housing chamber 22 shown in FIG. A (space) 25 is formed. In other words, the cylindrical second filter member 19 has a first air intake surface 23 on the side of its outer peripheral surface facing the second cyclone exhaust port (inlet) 16 . A first gap 25 is formed between 23 and the second cyclone outlet 16 . In other words, the formation of the first gap 25 prevents the second filter member 19 from blocking the second cyclone exhaust port (inflow port) 16 .

Since the first gap 25 is formed between the first air intake surface 23 on the outer peripheral surface of the second filter member 19 and the second cyclone exhaust port 16 in this way, the air containing dust is allowed to pass through this first space. It can enter the second filter member 19 through the gap 25 . As a result, dust can be collected by the second filter member 19 before the dust reaches the first filter member 18, and clogging of the first filter member 18 can be suppressed. Also, in the second filter member 19 , the first gap 25 allows the airflow to pass over a wide area of the first intake surface 23 . As a result, the dust contained in the airflow can be collected by the large surface area of the second filter member 19, and the total amount of dust that can be collected by the second filter member 19 can be increased.

As a result, it is possible to reduce the possibility that the first filter member 18 is clogged at an early stage, and to prevent the suction force from being lowered at an early stage. Furthermore, the maintenance frequency of the first filter member 18 can be reduced, and the workability of the cleaner 1 can be improved.

Even dust generated from the gypsum board can be collected by adhering to the large surface area of the outer peripheral portion of the second filter member 19 . However, since the second filter member 19 has a coarse mesh and high air permeability, it is possible to reliably pass air even if a large amount of dust generated from the gypsum board adheres to the second filter member 19 .

6, a plurality of inlets (second cyclone exhaust ports) 16 are provided in the outer peripheral portion of the second filter member 19 in the radial direction Y about the axis Q in the filter housing chamber 22. A second gap (space) 26 communicating with the plurality of inlets (second cyclone exhaust ports) 16 is formed. In other words, the second air intake surface 24 is provided on the outer peripheral surface of the second filter member 19 shown in FIG. A second gap 26 is formed between 24 and the wall surface 27 of the filter housing chamber, which is the inner wall surface of the filter portion 31 . The first gap 25 and the second gap 26 communicate with each other at the outer peripheral portion of the second filter member 19 . In other words, the outer peripheral portion of the second filter member 19 has a wide exposed portion consisting of the first air intake surface 23 and the second air intake surface 24 shown in FIG. That is, the outer peripheral portion of the second filter member 19 has a large surface area that is exposed without being blocked.

Therefore, since the second gap 26 is provided, it is possible to secure a gap for the air to flow toward the second air intake surface 24 side, and the second filter member in a state in which the air flows toward the second air intake surface 24 side. 19 can be entered. As a result, dust contained in the airflow can be collected over a wider surface area by utilizing the second air intake surface 24, and as a result, the total amount of dust that can be collected by the second filter member 19 can be increased. can be done.

In addition, since the outer peripheral surface of the second filter member 19 is provided with the second suction surface 24, the outer peripheral portion of the second filter member 19 has a large volume portion that is exposed without being blocked. As a result, a large amount of dust can adhere to the large-volume portion of the second filter member 19, and the total amount of dust that can be collected by the second filter member 19 can be further increased.

3 and 6, a plurality of inlets (second cyclone exhaust ports) 16 are arranged side by side in the circumferential direction R centering on the axis Q, and a cylindrical second filter member 19 is provided. are provided so as to overlap with the plurality of inlets (second cyclone exhaust ports) 16 in the radial direction Y about the axis Q. As shown in FIG.

As a result, the air discharged from each of the plurality of inlets (second cyclone outlets) 16 can pass through the second filter member 19 as it is, and dust contained in the air can be easily collected. .

Also, the second filter member 19 is detachably attached to the outer peripheral portion of the first filter member 18 . Here, as shown in FIG. 3, the first filter member 18 has a disk-shaped resin wall portion 18a disposed on the second cyclone portion 29 side. is formed with a flange portion 18b. The second filter member 19 is detachably fitted to the flange portion 18b. Therefore, the second filter member 19 can be easily and independently removed from the first filter member 18 by deforming the second filter member 19 to release the fitting to the flange portion 18b. That is, when performing maintenance on the second filter member 19, only the first filter member 18 and the second filter member 19 can be removed for maintenance. For example, when the second filter member 19 is made of sponge, only the second filter member 19 can be removed and washed with water easily. Even when a large amount of dust generated from the gypsum board adheres to the second filter member 19, only the second filter member 19 can be removed and washed with water, improving the workability of the cleaner 1. can be planned.

Further, the first filter member 18 has a disk-shaped resin wall portion 18a disposed on the second cyclone portion 29 side. The disk-shaped wall portion 18a can prevent the air containing dust that has flowed into the first gap 25 from flowing toward the central portion inside the filter housing chamber 22 . That is, it is possible to prevent the dust-containing air that has flowed into the first gap 25 from directly entering the first filter member 18 without passing through the second filter member 19 . As a result, it is possible to reduce the adhesion of dust from the gypsum board or the like to the first filter member 18 .

Next, a modified example of the cleaner 1 of this embodiment will be described. A first modification shown in FIGS. 8 and 9 is obtained by changing the shape of the outer peripheral portion of the second filter member 19 with respect to the cleaner 1 shown in FIG. As shown in FIG. 9, in the first modification, a tubular second filter member 19 is attached to the outer peripheral portion of the tubular first filter member 18, and the second filter member 19 has unevenness on the outer peripheral portion. is formed. Specifically, a concave portion 19 a and a convex portion 19 b are formed on the outer peripheral portion of the second filter member 19 . As shown in FIG. 8, the upper surface of the convex portion 19b forms an outer peripheral portion so as to contact the wall surface 27 of the filter housing chamber, and has a shape in which the surface area and volume of the outer peripheral portion of the second filter member 19 are increased. be. It is also possible to employ the second filter member 19 having such a shape that unevenness is formed on the outer peripheral portion.

A second modification shown in FIG. 10 is a filter in which the first filter member 18 is folded. It is intended to enter from the direction along Q. Therefore, since it is necessary for the air to pass through the second filter member 19 before passing through the first filter member 18, the second filter member 19 is composed of a ring-shaped filter outer peripheral portion 19c and an integral portion of the filter outer peripheral portion 19c. and a disk-shaped filter central portion 19d formed in the center portion 19d. As a result, the disk-shaped filter center portion 19d of the second filter member 19 covers the second cyclone portion 29 side of the first filter member 18. As shown in FIG. As a result, part of the dust-containing air that has flowed into the first gap 25 enters the center-directed flow path 22a formed inside the filter housing chamber 22 and forms an air flow P11 toward the center of the main body. After flowing, it passes through the disk-shaped filter center portion 19 d of the second filter member 19 and then through the first filter member 18 . The other part of the dust-containing air that has flowed into the first gap 25 passes through the filter outer peripheral portion 19 c of the second filter member 19 and then through the first filter member 18 .

As a result, the dust-containing air that has flowed into the first gap 25 can be passed through the second filter member 19 having a larger surface area and then through the first filter member 18 . Therefore, the cleaner 1 of the second modified example shown in FIG. 10 can also obtain the same effect as the cleaner 1 shown in FIG.

The present invention is not limited to the above embodiments, and can be modified in various ways without departing from the scope of the invention. For example, in the above-described embodiment, a plurality of inlets (second cyclone exhaust ports) 16 are formed in the second cyclone section 29 , and each of these plurality of inlets (second cyclone exhaust ports) 16 is connected to the filter housing chamber 22 . I have described a structure that communicates with the . However, a structure may be adopted in which each of the plurality of second cyclone exhaust ports 16 communicates with one channel, and this one channel communicates with the filter housing chamber 22 .

In the above-described embodiment, both the outflow port 21 and the inflow port 16 are opened along the axis Q, but the opening directions are not limited to this and may be different from each other. Moreover, although both the first filter member 18 and the second filter member 19 are formed in a cylindrical shape centered on the axis Q, the axial directions of the cylinders are not limited to this, and may be different from each other. For example, the outflow port 21 opens along the axis Q, the first filter member 18 and the second filter member 19 are formed in a cylindrical shape centered on the axis Q, but the inflow port 16 is perpendicular to the axis Q. A configuration in which the inlet is opened along the axis, that is, a configuration in which the opening direction of the inlet is different from the axis Q may be employed. In this case, the first gap 25 is formed between the second filter member 19 and the inlet 16 at least in the opening direction of the inlet 16, that is, in the direction of the axis perpendicular to the axis Q.

Although the first gap 25 and the second gap 26 are provided in the above embodiment, the object of the present invention can be achieved by forming a space between the second filter member 19 and the inlet 16. Therefore, either one of the first gap 25 and the second gap 26 may be provided, or neither of them may be provided. For example, when the inlet 16 is formed on the outer circumference side of the outer circumference of the second filter member 19, a space is formed without providing the first gap 25, so the object of the present invention is achieved.

DESCRIPTION OF SYMBOLS 1... Cleaner (work machine), 2... Main body part, 3... Dust collection part, 4... Grip part, 5... Battery, 6... Housing, 7... Dust accommodation member, 8... Dust collection part inlet, 9... Operation part, DESCRIPTION OF SYMBOLS 10... Fan motor 11... 1st cyclone air inlet 12... 1st cyclone air outlet 13... Mesh filter 14... 1st cyclone dust collection chamber 15... 2nd cyclone air inlet 16... 2nd cyclone air outlet (Inlet) 17 Second cyclone dust collection chamber 18 First filter member

18a Wall portion

18b Flange portion 19 Second filter member 19a Concave portion 19b Convex portion 19c Filter Outer peripheral portion 19d Filter central portion 20 Body exhaust port 21 Fan motor intake port (outflow port) 22 Filter housing chamber (filter housing portion) 22a Flow path toward center 23 First intake surface , 24 .. Second intake surface 25 .. First gap 26 .. Second gap 27 . … Filter part

Claims

a fan housing that houses a fan that is rotated by the motor;
a first cyclone section in which an air flow, which is a flow of air sucked by the rotation of the fan, circulates;
a second cyclone section in which the air flow discharged from the first cyclone section swirls;
a filter accommodating portion connecting the second cyclone portion and the fan accommodating portion and accommodating a filter portion therein;
has
The filter housing part is
an outlet opening in a direction along the axis and through which air flows out to the fan housing;
an inlet into which air is introduced from the second cyclone;
has
The filter section is
a first filter member arranged to block an air flow path from the inflow port to the outflow port;
a second filter member arranged upstream of the flow path from the first filter member and having higher air permeability than the first filter member;
with
A working machine, wherein a space is formed between the second filter member and the inlet.
The working machine according to claim 1, wherein the space includes a first gap formed between the second filter member and the inlet in an opening direction of the inlet.
The working machine according to claim 2, wherein the second filter member is arranged so as to overlap with the inlet in the opening direction.
4. The space according to any one of claims 1 to 3, wherein the space includes a second gap formed in an outer peripheral portion of the second filter member in a radial direction about the axis so as to communicate with the inlet. Working machine described in paragraph.
A plurality of the inlets are arranged side by side in a circumferential direction around a center line extending in an opening direction of the inlets,
The work machine according to any one of claims 1 to 4, wherein the second filter member is provided so as to overlap with the plurality of inlets in a radial direction about the center line.
The working machine according to any one of claims 1 to 5, wherein the second filter member is formed in a tubular shape centered on the axis and is detachably attached to an outer peripheral portion of the first filter member.
7. The working machine according to claim 6, wherein said first filter member is formed in a tubular shape centered on said axis, and an interior thereof communicates with said inlet.
The first filter member is made of nonwoven fabric,
The work machine according to any one of claims 1 to 7, wherein the second filter member is made of sponge.
The work machine according to any one of claims 1 to 8, wherein the axis extends parallel to an opening direction of the inlet.