CN1277004A

CN1277004A - Electric dust collector

Info

Publication number: CN1277004A
Application number: CN00118002A
Authority: CN
Inventors: 中井康一; 小寺定基; 小林利造; 藤吉俊行; 森好弘; 西山高裕
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 1999-06-11
Filing date: 2000-06-06
Publication date: 2000-12-20
Also published as: KR100359067B1; KR20010049519A; JP3408196B2; TW559054U; JP2000350686A

Abstract

The present invention provided a vacuum cleaner having an optimum hose, in which exhaust from a motor-driven fan incorporated in a cleaner body flows back to a suction piece, or the like, via a hose and a pipe. In this vacuum cleaner, a hose 21, a pipe 32 and a suction piece 33 connected to a cleaner body 1 having a motor-driven fan 14 built in have formed therein an intake flow passage and an exhaust flow passage through which exhaust from the motor-driven fan 14 flows back. The hose 21 comprises an outer hose 22 and an inner hose 23 and has formed therein the exhaust flow passage and the intake flow passage. Flexible hoses each constructed of a long member wound into a tubular shape are used as the outer hose 22 and the inner hose 23, and the inner hose 23 and the outer hose 22 are wound in the same direction.

Description

Electric dust collector

The present invention relates to electric dust collector, especially relate to make from body of dust collector the electric dust collector of exhaust gas recirculation (circulation) formula that refluxes to suction fitting etc. via flexible pipe and pipe of the exhaust of built-in electric fan.

At general floor mobile model electric dust collector, make from body of dust collector the exhaust outlet row that forms of the whole comfortable body rear side of exhaust etc. of built-in electric fan to the outside, but because of the exhaust from electric fan is all discharged, so blow out consumingly to the outside.Therefore, take place stagnant dust on ground or carpet because of this exhaust wind kick up and in the room, spread bad.

In order to reduce this purposes such as outside exhaust wind or raising dust collecting effect that blow to, as from known for example public clear 39-36553 communique or spy strictly according to the facts open flat 9-13579 communique etc. open as, the electric dust collector that forms air-breathing stream and will form from the exhaust flow path of part or all backflow of the exhaust of electric fan at the flexible pipe, pipe and the suction fitting that link with body of dust collector has been proposed.

In above-mentioned electric dust collector, flexible pipe and pipe are constituted duplex, make to form air-breathing stream in the inboard, form exhaust flow path in the outside, but do not have any conception for the concrete structure of flexible pipe.

The object of the present invention is to provide a kind of electric dust collector, make from body of dust collector the exhaust of built-in electric fan via flexible pipe and pipe to backflows such as suction fittings, possess best flexible pipe.

The first aspect that solves above-mentioned problem provides a kind of electric dust collector, form air-breathing stream and will be at the flexible pipe, connecting piece and the suction fitting that link with the body of dust collector of built-in electric fan from the exhaust flow path of the exhaust gas recirculation of electric fan, wherein, constitute described flexible pipe with outside flexible pipe and inboard flexible pipe, form exhaust flow path and air-breathing stream, and this outside flexible pipe and inboard flexible pipe use the flexible hose that will long member be wound into tubulose separately, and the coiling direction of this inboard flexible pipe and the coiling direction of outside flexible pipe are made as in the same way.

In above-mentioned structure, the most handy described inboard flexible pipe forms the inspiratory flow road, simultaneously, forms exhaust flow path between described outside flexible pipe and described inboard flexible pipe.

The hose transition of the duplex that the linking part setting that is preferably in described body of dust collector and described flexible pipe is made of outboard tube and inboard flexible pipe, be obliquely installed the holding section that engages described flexible pipe with respect to tube axial direction separately in the periphery of described outboard tube and the periphery of inside tube, be made as the inclination separately of this holding section equidirectional.

Again, the hose transition of the duplex that the linking part setting that is preferably in described pipe and described flexible pipe is made of outboard tube and inside tube, be obliquely installed the holding section that engages described flexible pipe with respect to tube axial direction separately in the periphery of this outboard tube and the periphery of inside tube, be made as the inclination separately of this holding section equidirectional.

And the outboard tube of best described hose transition and inside tube separately constitute.

Again, best described inside tube supports outside on the side pipe free to rotately.

Being simply described as follows of accompanying drawing:

Fig. 1 is the sectional side view of the unitary construction of expression electric dust collector of the present invention, omits the part midway of flexible pipe;

Fig. 2 is the amplification profile of the body part of this electric dust collector;

Fig. 3 is the amplification profile that has connected the state of flexible pipe at the base side hose transition of this electric dust collector;

Fig. 4 is the side view of this base side hose transition;

Fig. 5 is the side view that the part of the flexible pipe of this electric dust collector is cut open;

Fig. 6 is the side view of cutting open in the part of the outside of Fig. 5 flexible pipe;

Fig. 7 is the side view of cutting open in the part of the inboard flexible pipe of Fig. 5;

Fig. 8 is the profile of the portion of holding of this electric dust collector;

Fig. 9 is the profile that has connected the state of flexible pipe at the embodiment 2 of this electric dust collector at hose transition;

Figure 10 is the profile that has connected the state of outside flexible pipe in the outboard tube of Fig. 9;

Figure 11 is the profile that has connected the state of inboard flexible pipe in the inside tube of Fig. 9;

Figure 12 is the profile that the flexible pipe of this electric dust collector is held portion;

Figure 13 is the profile that has connected the state of flexible pipe at the hose transition of Figure 12;

Figure 14 is the side view of this hose transition;

Figure 15 is the profile that has connected the state of outside flexible pipe in the outboard tube of Figure 13;

Figure 16 is the profile that has connected the state of inboard flexible pipe in the inside tube of Figure 13;

To be expression inside tube and outboard tube be the key diagram of situation about can freely rotate each other to Figure 17.

Fig. 1 to Fig. 8 represents embodiments of the invention 1, below describes according to these figure.

Label 1 is a body of dust collector, as shown in Figure 2, is made of upper casing 2, lower casing 3 and dust collection cover 4, forms the flexible pipe connector 5 that connects base side hose transition 17 described later at the front side of body of dust collector 1, and side forms the steam vent 6 of seam shape in the wings.Bottom in this body of dust collector 1 utilizes spaced walls 7 to be divided into upper space in the body of dust collector 1, forms and exhaust flow path B1 that this flexible pipe connector 5 is communicated with and and the outside exhaust flow path C that is communicated with of described steam vent 6.At these spaced walls 7 upright differentiation walls 8 that the space region above the spaced walls 7 are divided into front and back of establishing.

Label 9 is at the formed dust storage chamber of the front side of this differentiation wall 8, and side forms a flexible pipe insertion mouthful 9a and 5 one-tenth concentric circles of this flexible pipe connector forwardly.In this dust storage chamber 9, will collect into disassembled and assembled freely to the dust bag install bin 11 that dust bag 10 is fixed into disassembled and assembled freely, and be set as the opening of dust bag 10 under installment state and the flexible pipe of this dust storage chamber 9 and insert mouthful 9a in opposite directions.

Label 12 is the micronic filters that are contained in this differentiation wall 8, is positioned at the rear side of described dust bag 10, removes fine dust.

Label 13 is the electric fan boxrooms in the rear side formation of this differentiation wall 8, its inner folding and unfolding has electric fan 14, lower side at this electric fan boxroom 13 is formed with opening 13a, so that electric fan boxroom 13 and described exhaust flow path B1 and outside exhaust flow path C are communicated with, the upright rib 15 of being located at lower casing 3 of utilization will be by the driving of electric fan 14 from the bypassing exhaust of electric fan 14, from this opening 13a via this exhaust flow path B1 guiding flexible pipe connector 5 sides, and a part from this opening 13a via outside exhaust flow path C, being located at the discharge filter 16 of steam vent 6 arranges outside body of dust collector 1 from steam vent 6.

Label 17 is the base side hose transitions that are connected and are contained in flexible pipe connector 5 with flexible pipe 21 described later, as shown in Figures 3 and 4, adopt by columnar outboard tube 18 and utilize a plurality of ribs 19a to be integrally formed at the duplex that the inside tube 19 on this outboard tube 18 constitutes.

One of the flexible pipe connector 5 that is contained in this outboard tube 18 distolaterally is formed with card claw stop 18a and is located at being ended by fastener 5a card of flexible pipe connector 5, and distolaterally is formed obliquely screw-shaped outer ribs 18b with respect to tube axial direction at another.

Described inside tube 19 is longer than outboard tube 18, makes to be contained in one of flexible pipe connector 5 and distolaterally to insert mouthful 9a from flexible pipe and give prominence to dust storage chamber 9 in.And another distolateral formation is longer than outboard tube 18, outer circumferential side form and the outer ribs 18b of outboard tube 18 towards the interior side rib 19b of equidirectional inclination.Label 20 is columnar lids of being arranged to cover the side of the flexible pipe 21 that connects base side hose transition 17.

This base side hose transition 17 ends through flexible pipe connector 5 cards with described card claw stop 18a and this body of dust collector 1, the inside tube 19 of described base side hose transition 17 is given prominence in this dust storage chamber 9 also and connection in the dust storage chamber 9, become air-breathing stream A2 in the inside tube 19.Again, the exhaust flow path B1 in outboard tube 18 and the body of dust collector 1 is communicated with, and becomes exhaust flow path B2 between outboard tube 18 and the inside tube 19.

Label 21 is the flexible pipes that are contained in base side hose transition 17 and hose transition described later 27, as shown in Figure 5, and the duplex that serve as reasons outside flexible pipe 22 and inboard flexible pipe 23 constitute.

This outside flexible pipe 22 is wound into helical form and forms tubulose through the member with length as shown in Figure 6, the spiral helicine teat 22b of each self-forming, 22c on the member of its junction surface 22a and length.And, pretend coil 22d in this teat 22b into the electric conductivity of holding wire, harness has the coil 22e of conformality in teat 22c.

Utilize the intensity of coil 22d, the 22e maintenance flexible pipe 21 of outside flexible pipe 22.In addition, form this outside flexible pipe 22 with translucent material.

And inboard flexible pipe 23 is wound into helical form and forms tubulose through the member with length as shown in Figure 7, and the spiral helicine teat 23b of each self-forming, 23c on the member of its junction surface 23a and length form with opaque material.

This flexible pipe 21 at first makes the inclination of interior side rib 19b of the coiling direction of inboard flexible pipe 23 and base side hose transition 17 equidirectional, side rib 19b in inboard flexible pipe 23 is screwed into.At this moment, distolateral more outstanding than outboard tube 18 because of the connection flexible pipe 21 of inside tube 19 is so insert installation after can making inboard flexible pipe 23 hook this ledge earlier.Therefore, inboard flexible pipe 23 is installed easily.

Then, the same with the situation of inboard flexible pipe 23, after making the inclination of outer ribs 18b of outside coiling direction of flexible pipe 22 and base side hose transition 17 equidirectional, outside flexible pipe 22 is screwed into outer ribs 18b, finishes the installation of 21 pairs of base side hose transitions 17 of flexible pipe.

At this moment, in the inboard flexible pipe 23 and the air-breathing stream A2 of base side hose transition 17 be communicated with, become air-breathing stream A3, and between outside flexible pipe 22 and the inboard flexible pipe 23 and the exhaust flow path B2 of base side hose transition 17 be communicated with, form exhaust flow path B3.

Again, because of the coiling direction with the coiling direction of inboard flexible pipe 23 and outside flexible pipe 22 be taken as equidirectional, so the flexible direction of inboard flexible pipe 23 and outside flexible pipe 22 or easily direction of twist be equidirectional.Therefore, flexible pipe 21 distortions or when crooked in body of dust collector 1 uses, follow the trail of mutually because of outside flexible pipe 22 and inboard flexible pipe 23 and to twist or crooked, thus outside flexible pipe 22 and inboard flexible pipe 23 can not become resistance each other for separately distortion or bending, can guarantee the amount of deflection of flexible pipe 21.

Label 24 is that at one end side connects flexible pipe 21, and in the portion of holding of another distolateral installation connecting piece 32 described later, and by the handle portion 35 that connecting piece 32 is installed, and at one end side connects flexible pipe 21 and another distolateral hose transition 27 that is contained on the handle portion 35 constitutes.

This hose transition 27 adopts and is integrally formed at the duplex that the inside tube 29 on this outboard tube 28 constitutes by columnar outboard tube 28 and with ribs 29a, is provided with to cover 31 to cover a side that connects flexible pipe 21.

The outer ribs 18b of each self-forming of periphery of this outboard tube 28 and inside tube 29 and described base side hose transition 17 and in the same outer ribs 28b that tilts of side rib 19b and in side rib 29b, can be with the outside flexible pipe 22 of flexible pipe 21 and inboard flexible pipe 23 towards equidirectional stubborn and install.Thereby the upright operation of group is easy.

At this moment, the exhaust flow path B3 with flexible pipe 21 between outboard tube 28 and the inside tube 29 is communicated with, and becomes exhaust flow path B4.Again, the air-breathing stream A3 connection in the inside tube 29 and in the flexible pipe 21 becomes air-breathing stream A4.

Described handle portion 35 is made of the tube 25 of へ font and the handle 26 that extends above tube 25, forms the installing port 25a that connecting piece 32 is installed, and is provided with folder 25b on the top of installing port 25a.Again, be communicated with at inner and installing port 25a, form the cylindrical portion 30 of the end of inserting described inside

tube

29,30 air-breathing stream A4 interior and inside tube 29 are communicated with cylindrical portion, become air-breathing stream A5, and with the outside of cylindrical portion 30 with hold between the periphery of portion 24 and be communicated with, as exhaust flow path B5 with the exhaust flow path B4 that forms by inside tube 29 and outboard tube 28.

Label 32 is and presss from both sides the connecting piece that the 25b card ends and be contained in the installing port 25a of the portion of holding 24, forms through linking two pipe 32a.This connecting piece 32 constitutes by the outside cylindrical portion 32b of cross section approximate circle shape with the integrally formed inboard cylindrical portion 32c of this outside cylindrical portion 32b off-centre and top and outside cylindrical portion 32b, and inboard cylindrical portion 32c and outside cylindrical portion 32b form half moon-shaped space.And, when being contained in the portion 24 of holding, inboard cylindrical portion 32c and the air-breathing stream A5 that holds portion 24 are communicated with, and form air-breathing stream A6 in inside at this connecting piece 32, and be communicated with the exhaust flow path B5 of the portion of holding 24 between outside cylindrical portion 32b and the inboard cylindrical portion 32c, form exhaust flow path B6.

Again, because of the exhaust by this exhaust flow path B6 be via the dust bag 10 of body of dust collector 1 or micronic filter 12 filterings the air of cleaning of dust, so be conceived to and form cross section approximate circle shape this point as considering lint stoppage as the inboard cylindrical portion 32c, in the present embodiment, that this exhaust flow path B6 is made as the cross section is approximate crescent as above-mentioned, and cylindrical portion 32b forms cross section approximate circle shape with the outside.

Label 33 is the suction fittings that are connected with connecting piece 32, and tube connector 33a, the 33b that is connected with connecting piece 32 forms the duplex of concentric circles, adopts the shape the same with connecting piece 32 with the telescoping part of this connecting piece 32.

And, when using as constituted above electric dust collector, through the suction of electric fan 14, the mixing that sucks from suction fitting 33 air-breathing stream A5, the air-breathing stream A3 of flexible pipe 21 of air by connecting piece 32 of dust, be inhaled in the body of dust collector 1.In body of dust collector 1, with dust bag 10 filtering dust, the air via micronic filter 12 cleaningizations is attracted by electric fan 14 again, cools off this electric fan 14.

Then, discharge to the outside from the steam vent 6 of body of dust collector 1 from the part of the exhaust of electric fan 14, other are from the exhaust flow path B1 of the body of dust collector 1 exhaust flow path B3 by flexible pipe 21.At this moment, because of the direction of the teat 23 of the direction of teat 22b, the 22c of outside flexible pipe 22 and inboard flexible pipe 23 forms equidirectional, so teat 23 caused aeration resistances for flow air between outside flexible pipe 22 and inboard flexible pipe 23 reduce, and can be suppressed at the interior loss of exhaust flow path B3 of flexible pipe 21.

Then, behind the exhaust flow path B3 by flexible pipe 21, by the exhaust flow path B6 of connecting piece 32, the dust that refluxes and kick up because of this exhaust wind to suction fitting 33 circulates to the air-breathing stream A6 of connecting piece 32 together again.

Through as an above-mentioned part that makes exhaust reflux, the exhaust wind that blows out to the outside reduces and dies down, and can be suppressed in the cleaning dust in room effectively and kick up.

In addition, in the above-described embodiments, make hose transition be contained on the connecting piece, but also hose transition can be formed the へ font, connecting piece directly is installed at hose transition via handle portion.

Represent embodiment 2 at Fig. 9 to Figure 17, describe according to these figure.In embodiment 2, the outboard tube 18 and the inside tube 19 of base side hose transition 17 are separated, and the outboard tube 28 and the inside tube 29 of hose transition 27 are separated.In addition, to investing identical symbol, omit explanation with the foregoing description 1 identical parts.

Label 51 is the base side hose transitions that are connected and are contained in body of dust collector 1 with flexible pipe 21, as shown in Figure 9, is made of columnar outboard tube 52 and inside tube 53.

In this outboard tube 52 as shown in figure 10, the card claw stop 52a that end at a distolateral formation that is contained in body of dust collector 1 and flexible pipe connector 5 cards are at the same outer ribs 52b of another distolateral formation and the foregoing description 1.Label 54 is pressing plates of pushing down card claw stop 52a from the top.

Described inside tube 53 and outboard tube 52 separately forms, a plurality of ribs 53a of a distolateral formation that are being contained in body of dust collector 1 in periphery.Contacting in interior week of this ribs 53a and outboard tube 52 supported inside tube 53 in outboard tube 52.

Again, at about formation negative thread 53c of portion of central authorities of inside tube 53, the installation screw 55 of fixing described pressing plate 54 is outstanding from the interior week of outboard tube 52, twists with the 53c of this negative thread portion through this installation screw 55 and closes, and inside tube 53 is fixed in outboard tube 52.

And, distolateral the same at another of inside tube 53 with the foregoing description 1, form the interior side rib 53b of court and the equidirectional inclination of outer ribs 52b, side rib 53b is screwed into inboard flexible pipe 23 and installs in this.

The assembling of the base side hose transition 17 of above-mentioned structure be the coiling direction with flexible pipe 21 be made as with interior side rib 53b and outer ribs 52b equidirectional after, pull out the inboard flexible pipe 23 of flexible pipe 21 from outside flexible pipe 22.Then, side rib 53b and after installing in inboard flexible pipe 23 is screwed into is screwed into outer ribs 52b with outside flexible pipe 22 and installs.At last, utilize the mounting screw 55 of fixation clip 54 that inside tube 53 is fixed in outboard tube 52 and finish.

At this moment, inside tube 53 and outboard tube 52 are separated, because of being contained on the inside tube 53 after outside flexible pipe 22 is pulled out inboard flexible pipe 23, so installation exercise is easy.

Secondly, illustrate that at one end side connects flexible pipe 21 and is contained in the hose transition 65 of holding portion 24 described later.

Label 65 is that at one end side connects flexible pipe 21 and is contained in the hose transition of holding portion 61 described later, adopts the duplex that is made of columnar outboard tube 63 and cylindrical inside pipe 64.Label 66 is lids of being arranged to cover the side that is connected with flexible pipe 21 of hose transition 65.

One as shown in figure 15 distolateral in outboard tube 63, the outer ribs 63a that will be screwed into outside flexible pipe 22 with embodiment 1 the same ground forms with the outer ribs 52b of base side hose transition 51 equidirectional.And form teat 63b in the position of only recessed set distance from the end in another distolateral interior week.

This inside tube 64 as shown in figure 16 and outboard tube 63 separately form.And at one end to be screwed into the interior side rib 64a of outside flexible pipe 22 the same with the foregoing description 1 for side, form with the interior side rib 53b of base side hose transition 51 equidirectional, and in periphery at tube axial direction formation ribs 64b.This ribs 64b forms and the contacting in interior week of outboard tube 63, supports in outboard tube 63 inside tube 64 free to rotate.Through contacting, make one of the flexible pipe 21 that is connected of distolateral and an outboard tube 63 of inside tube 64 distolaterally be positioned at same plane, and make that another distolateral other end from outboard tube 63 of inside tube 64 is side-prominent with another distolateral teat 63b of outboard tube 63 again.

The assembling of described hose transition 65 be the coiling direction with flexible pipe 21 be made as with interior side rib 64b and outer ribs 63b equidirectional after, pull out the inboard flexible pipe 23 of flexible pipe 21 from outside flexible pipe 22.Then, interior side rib 64b is screwed into inboard flexible pipe 23 and after installing, outer ribs 63b is screwed into outside flexible pipe 22 and installs.Then, make the teat 63b of the ribs 64b contact outboard tube 63 of inside tube 64, inside tube 64 is equipped on both allocations in the outboard tube 63 after, the ribs 64b of bonding inside tube 64 and outboard tube 63 and finish.

At this moment, because of inside tube 64 and outboard tube 63 can freely be rotated each other, reverse inside tube 64 so outboard tube 63 can not reversed, or do not reverse inside tube 64 and reverse outboard tube 63, therefore, can under situation about not twisting between outside flexible pipe 22 and the inboard flexible pipe 23, adjust the amount of being screwed into of

outboard tube

63 and 64 pairs of flexible pipes 21 of inside tube.Therefore, even the length of flexible pipe 21 has change also can easily regulate by the adjustment amount of being screwed into.

Again, as noted above, through inside tube 64 and outboard tube 63 are separated, after outside flexible pipe is pulled out inboard flexible pipe 23, side rib 64a and installing in inboard flexible pipe 23 is screwed into can easily not install even do not make the inside tube 64 of the side that is connected with flexible pipe 21 give prominence to from outboard tube 63 yet.Thereby, the side of the connection flexible pipe 21 of hose transition 65 is shortened, hose transition 65 Miniaturizables.Through shortening the lid 66 that covers the side that connects flexible pipe 21, can reduce by 66 the expense of covering again.

In addition, in the foregoing description 2, make the inside tube 64 of hose transition 65 be equipped on the both allocations in the outboard tube 63, but make and also can in that tube axial direction is removable.In the case, because of can adjusting the position of inside tube 64 being fixed in outboard tube 63, so can absorb the change of flexible pipe 21 length or the change of the amount of being screwed into when flexible pipe 21 is screwed into etc.Therefore, can improve assembleability.

Again, in the foregoing description 2, the hose transition 51 of body is with mounting screw 55 inside tube 53 to be fixed in outboard tube 52, but be not screwed, and makes in outboard tube 52 inside tube 53 to be supported to and free to rotately also can.Like this, at base side hose transition 51 also the samely with hose transition 65, even between outside flexible pipe 22 and inboard flexible pipe 23, be distorted, also can eliminate the distortion and outside flexible pipe 52 and inboard flexible pipe 53 is integrated, can not damage the tracking or the amount of deflection of flexible pipe 21 in use, can make easy to use.

In the foregoing description 2, the inside tube and the outboard tube that are contained in the hose transition of handle portion are separated, but inside tube and handle portion are formed one, and outboard tube and inside tube separately also can again.Again, connecting piece directly is contained in hose transition and takes away handle portion, the inside tube and the connecting piece of hose transition is integrally formed, and outboard tube and inside tube separately also can.

If according to a first aspect of the present invention, the flexible direction of inboard flexible pipe and outside flexible pipe or easy direction of twist become equidirectional, hose twist or when crooked in body of dust collector uses, follow the trail of mutually because of outside flexible pipe and inboard flexible pipe and to twist or crooked, so outside flexible pipe and inboard flexible pipe can not become resistance each other for distortion or bending separately, can guarantee the amount of deflection of flexible pipe.Because of the direction of the teat of the direction of the teat of outside flexible pipe and inboard flexible pipe forms equidirectionally,, can be suppressed at the loss in the exhaust flow path of flexible pipe so the caused aeration resistance for flow air between outside flexible pipe and inboard flexible pipe of teat reduces again.

If according to a second aspect of the present invention, because of the heat by the air in the heated exhaust flow path of electric fan can be dispelled the heat outside flexible pipe via outside flexible pipe, and can in air-breathing stream, dispel the heat, so can expeditiously the heat in the exhaust flow path be dispelled the heat via inboard flexible pipe.

If according to a third aspect of the present invention, because of can with inboard flexible pipe and outside flexible pipe is stubborn in the same direction being installed on the hose transition that is contained in body of dust collector, so can improve assembling operation.

If according to a fourth aspect of the present invention, because of inboard flexible pipe and outside flexible pipe being twisted the hose transition that is installed on tubulature in the same direction, so can improve assembling operation.

If according to a fifth aspect of the present invention,,, can improve installation exercise so the installation of outside flexible pipe and inboard flexible pipe is easy because of assembling inside tube and outboard tube after inboard flexible pipe is installed in outboard tube installation outside flexible pipe, inside tube.

If according to a sixth aspect of the present invention, because of inside tube and outboard tube can freely be rotated each other, can not reverse outboard tube and reverse inside tube, or do not reverse inside tube and reverse outboard tube, so can under situation about not twisting between outside flexible pipe and the inboard flexible pipe, easily adjust the amount of being screwed into of outboard tube and inside tube.

Claims

1. electric dust collector, flexible pipe, connecting piece and the suction fitting that links at the body of dust collector with built-in electric fan form air-breathing stream and will be from the exhaust flow path of the exhaust gas recirculation of electric fan,

It is characterized in that:

Constitute described flexible pipe with outside flexible pipe and inboard flexible pipe, form exhaust flow path and air-breathing stream, and described outside flexible pipe and inboard flexible pipe use the flexible hose that will long member be wound into tubulose separately, and the coiling direction of the coiling direction of described inboard flexible pipe and outside flexible pipe is got equidirectional.

2. electric dust collector as claimed in claim 1 is characterized in that, forms the inspiratory flow road and form exhaust flow path between described outside flexible pipe and described inboard flexible pipe with described inboard flexible pipe.

3. electric dust collector as claimed in claim 1 or 2, it is characterized in that, the hose transition of the duplex that constitutes by outboard tube and inside tube in the linking part setting of described body of dust collector and described flexible pipe, be obliquely installed the holding section that engages described flexible pipe with respect to tube axial direction separately in the periphery of described outboard tube and the periphery of inside tube, be taken as the inclination separately of this holding section equidirectional.

4. electric dust collector as claimed in claim 1 or 2, it is characterized in that, the hose transition of the duplex that constitutes by outboard tube and inside tube in the linking part setting of described pipe and described flexible pipe, be obliquely installed the holding section that engages described flexible pipe with respect to tube axial direction separately in the periphery of described outboard tube and the periphery of inside tube, be taken as the inclination separately of this holding section equidirectional.

5. as claim 3 or 4 described electric dust collectors, it is characterized in that the outboard tube of described hose transition and inside tube separately constitute.

6. electric dust collector as claimed in claim 5 is characterized in that described inside tube is supported in the described outboard tube free to rotately.