CN1143654C

CN1143654C - Electric vacuum cleaner and host for electric vacuum cleaner

Info

Publication number: CN1143654C
Application number: CNB001216910A
Authority: CN
Inventors: 西山高裕; 基; 小寺定基; 行; 藤吉俊行; 森好弘
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 1999-07-23
Filing date: 2000-07-21
Publication date: 2004-03-31
Anticipated expiration: 2020-07-21
Also published as: KR100346654B1; KR20010066950A; CN1281684A; JP2001029297A; TW583959U

Abstract

A vacuum cleaner with an optimal and well-designed hose, allowing exhaust air from an electric blower built in a cleaner body to be returned into a suction implement via a hose and a pipe. This vacuum cleaner has a suction passage and an exhaust passage formed in a hose 21, a connective pipe 32 and a suction implement 33 to be connected to a cleaner body 1 in which an electric blower 14 is built, and an exhaust passage serving for returning exhaust air from the electric blower 14. The hose 21 consists of an outside hose 22 and an inside hose 23 to form the exhaust passage and the suction passage, the outside hose 22 is formed to be semi-transparent and protrusions 22b, 22c on the outside hose 22 are colored.

Description

Electric dust collector and hose for electric vacuum cleaner

Technical field

The present invention relates to the flexible pipe and the electric dust collector that use at electric dust collector, relate in particular to make from body of dust collector the electric dust collector and the flexible pipe 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.

Background technology

In 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 rise and in the room, spread bad.

In order to reduce this outside exhaust wind or the raising dust collecting effect etc. of blowing to, as from existing for example public clear 39-36553 communique or spy strictly according to the facts open flat 9-13579 communique etc. open as, proposed following automatic cleaner, this electric dust collector forms air-breathing stream and will be from the exhaust flow path of part or all backflow of the exhaust of electric fan on the flexible pipe, connecting piece and the suction fitting that link with body of dust collector.

Summary of the invention

In above-mentioned electric dust collector, flexible pipe and connecting piece are constituted duplex, form air-breathing stream in the inboard, form exhaust flow path in the outside,, do not consider concrete structure, the design of flexible pipe at all for being that duplex makes the diameter of flexible pipe and pipe become problem such as big because of flexible pipe and 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 flexible pipe the suitableeest and that design is good.

Hose for electric vacuum cleaner of the present invention is made of back that long member is reeled forms tubular at projecting strip part welding connecting portion flexible hose, it is characterized in that: this flexible pipe is formed translucent, and it is painted to constitute the projecting strip part of connecting portion of member of length of flexible pipe.

Again, hose for electric vacuum cleaner of the present invention is made of the double-decker of outside flexible pipe and inboard flexible pipe, and each flexible pipe is made of back that long member is reeled forms tubular at projecting strip part welding connecting portion flexible hose, it is characterized in that: should outside flexible pipe form translucently, and the projecting strip part of connecting portion of the member of the length of flexible pipe be painted outside will constituting.

Coating this supply lines with the epithelium of white color system also can.

It is zinc-plated to be preferably in this supply lines.

The color of the projecting strip part of connecting portion adopts the system identical with the color of inboard flexible pipe also can.

Again, the color of the projecting strip part of connecting portion adopts the system different with the color of inboard flexible pipe also can.

In addition, the flexible pipe that electric dust collector of the present invention links at the body of dust collector with built-in electric fan, connecting piece and suction fitting 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: the double-decker with outside flexible pipe and inboard flexible pipe constitutes this flexible pipe, in described internal layer flexible pipe, form in the exhaust flow path, between described outside flexible pipe and described inboard flexible pipe, form exhaust flow path, and this flexible pipe uses the flexible hose that long member coiling back is formed tubulose at projecting strip part welding connecting portion, should the inboard flexible pipe form opaque and outside flexible pipe forms translucently, and it be painted to constitute the projecting strip part of connecting portion of member of length of outside flexible pipe.

Be preferably in inboard flexible pipe and form the inspiratory flow road, the while is at described outside flexible pipe and should form exhaust flow path between the flexible pipe of inboard.

Description of drawings

Fig. 1 is the side cut away 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 amplification profile of base side hose transition under the state that has omitted flexible pipe;

Fig. 5 is the partial cut-away view of the flexible pipe of this electric dust collector;

Fig. 6 is the partial cut-away view at the outside of Fig. 5 flexible pipe;

Fig. 7 is the partial cut-away view at 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 of this prolongation pipe.

The specific embodiment

According to the description of drawings embodiments of the invention.

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 is connected with base side hose transition 17 described later at the front side of body of dust collector 1, and the steam vent 6 of shape is stitched in side formation 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 this steam vent 6.Distinguish walls 8 this spaced walls 7 upright establishing, before and after the space region of the top of spaced walls 7 is divided into.

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.To collect into disassembled and assembled freely to the dust bag install bin 11 that dust bag 10 is fixed into disassembled and assembled freely in this dust storage chamber 9, make to be contained under the state of dust storage chamber 9 at this dust bag install bin 11, the flexible pipe of the opening of dust bag 10 and this dust storage chamber 9 inserts 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 this dust bag 10, removes fine dust.

Label 13 is that inner collection has electric fan 14 at the electric fan boxroom of the rear side formation of this differentiation wall 8.Lower side at this electric fan boxroom 13 forms opening 13a, with electric fan boxroom 13 and described exhaust flow path B1 and outside exhaust flow path C connection, the upright rib 15 of being located at lower casing 3 will be through driving electric fan 14 from the bypassing exhaust of electric fan 14 as utilization as the division opening 13a, from this opening 13a via exhaust flow path B1 guiding flexible pipe connector 5 sides, and a part from this opening 13a via outside exhaust flow path C, be located at steam vent 6 discharge filter 16 from steam vent 6 rows outside body of dust collector 1.

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 side pipe outside the cylindrical shape 18 and the duplex that utilizes the integrally formed inside tube of a plurality of ribs 19a 19 to constitute in this outboard tube 18.

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

This inside tube 19 as be contained in one of flexible pipe connector 5 and distolaterally insert mouthful 9a from flexible pipe and to dust storage chamber 9 in, form than outboard tube 18 length as outstanding.And the distolateral formation of another of this inside tube 19 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 coupling part of base side hose transition 17 and flexible pipe 21.

This base side hose transition 17 ends through flexible pipe connector 5 cards that will block claw stop 18a and body of dust collector 1, and the inside tube 19 of this base side hose transition 17 is given prominence to also and in the dust storage chamber 9 in dust storage chamber 9 and is communicated with, and becomes 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 that an end is contained in base side hose transition 17, and the other end is contained in the flexible pipe of hose transition 27 described later simultaneously, as shown in Figure 5, and the duplex that serve as reasons outside flexible pipe 22 and inboard flexible pipe 23 constitute.

Outside flexible pipe 22 forms tubulose as shown in Figure 6 through the member that will form banded length is wound into helical form, at the central portion of the width of long member and the spiral helicine prominent bar 22b of each self-forming of junction surface 22a, the 22c of this member of growing.

In the present embodiment, long member forms with translucent resin (being the polystyrene synthetic rubber in the present embodiment), and prominent bar 22b, 22c form after various resins (is polypropylene at present embodiment) have added milky colouring agent.

Pretend

coil

22d, 22e in separately at this prominent bar 22b, 22c into the electric conductivity of holding wire.Zinc-plated at this

coil

22d, 22e, under coil 22d, the 22e state in being equipped on milky prominent bar 22b, 22c, be difficult to see

coil

22d, 22e.

This outside flexible pipe 22 will set in advance coil 22e and as cover the member that has formed the length of prominent bar 22c as this coil 22e and be wound into helical form, being wound into the side that coil 22e is positioned at the member of adjacent length simultaneously is that connecting portion 22a departs from, also cover coil 22d with the milky resin that becomes prominent bar 22b, and through the connecting portion 22a thermal welding of the member of adjacent length is formed.

Because of the translucent resin of outside flexible pipe 22 usefulness forms, and prominent bar 22b, 22c form with milky, thus can make the outward appearance of flexible pipe 21 seem little, and be difficult to see as coil 22d, the 22e of holding wire, can improve outward appearance.Because of

coil

22d, 22e as holding wire are difficult to see, can suppress user's sense of insecurity again.

In addition, because of

coil

22d, 22e zinc-plated, so more unshowy in forming milky prominent bar 22b, 22c, can further improve outward appearance.Again, be equipped on the position of the connecting portion 22a that departs from long member because of

coil

22d, 22e, so when outside flexible pipe 22 forms under the situation that the gapped state of the member of adjacent length connects,

coil

22d, 22e also not laterally flexible pipe 22 inboards expose, it is bad to prevent that

coil

22d, 22e from producing short circuit etc.

And, inboard flexible pipe 23 as shown in Figure 7, through will long member being wound into helical form and forming tubulose, at the central portion of the width of long member and the spiral helicine prominent bar 23b of each self-forming of junction surface 23a, the 23c of this long member.

This inboard flexible pipe 23, in the present embodiment, it is opaque that long member uses the resin (polystyrene synthetic rubber) painted through the interpolation colouring agent to form, and prominent bar 22b, 22c also use and be somebody's turn to do homochromy resin (polypropylene) formation of long member.

Inboard flexible pipe 23 is also the same with this outside flexible pipe 22, and the member that has been pre-formed the length of prominent bar 23c is wound into helical form, and simultaneously, the resin that usefulness becomes the bar 23b that dashes forward forms the connecting portion 23a thermal welding of the member of adjacent length.

And, side rib 19b in this flexible pipe 21 at first is made as the coiling direction of inboard flexible pipe 23 with the inclination of the interior side rib 19b of base side hose transition 17 and inboard flexible pipe 23 is screwed into after equidirectional.At this moment, because of distolateral outstanding than outboard tube 18 of a side of the connection flexible pipe 21 of inside tube 19, just can install so inboard flexible pipe 23 is tangled insert behind this ledge.Therefore, inboard flexible pipe 23 is installed easily.

Secondly, the coiling direction of outside flexible pipe 22 is made as with the inclination of the outer ribs 18b of base side hose transition 17 with the situation of inboard flexible pipe 23 the samely and outside flexible pipe 22 is screwed into outer ribs 18b after equidirectional, finish 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, become 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 made as equidirectional, so the flexible direction of inboard flexible pipe 23 and outside flexible pipe 22 or easily torsional direction become equidirectional.Therefore, flexible pipe 21 reverses or when crooked in body of dust collector 1 uses, because of outside flexible pipe 22 and inboard flexible pipe 23 reverses mutually with following the trail of or crooked, thus outside flexible pipe 22 and inboard flexible pipe 23 for separately reverse or bending can not become resistance each other, guarantee the flexibility 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, 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 in handle portion 35 constitutes.

This hose transition 27 adopts by columnar outboard tube 28 and with ribs 29a and the duplex that these outboard tube 28 integrally formed inside tube 29 constitute, and is provided with and covers 31, connects flexible pipe 21 sides to cover.

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

This handle portion 35 is made of ヘ font tube 25 and the handle 26 that extends on tube 25, forms the installing port 25a that connecting piece 32 is installed, and folder 25b is set 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 this 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 2 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 outside cylindrical portion 32b and inboard cylindrical portion 32c 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, inhaled electric fan 14 via the air of micronic filter 12 cleaningizations again and sucked, cool off this electric fan 14.

And, to 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 prominent bar 23 of the direction of prominent bar 22b, the 22c of outside flexible pipe 22 and inboard flexible pipe 23 forms equidirectional, so prominent bar 23 caused air permeance resistance 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.

And 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 above-mentioned one of exhaust partial reflux that makes, die down because of the exhaust wind that blows out to the outside reduces, kick up so can be suppressed in the cleaning dust in room effectively.

Because of the translucent resin of outside flexible pipe 22 usefulness forms, so, also can make the outward appearance of flexible pipe seem little even flexible pipe is adopted duplex for the exhaust gas recirculation that makes electric fan.

Again, forming with translucent resin simultaneously under the situation of prominent bar 22b, 22c with translucent outside flexible pipe 22, because of having an X-rayed as the coil 22d, the 22e that are equipped on the holding wire in the outside flexible pipe 22, the user has sense of insecurity, but because of prominent bar 22b, the 22c of outside flexible pipe 22 forms with milky, the coil 22d, the 22e that pretend to holding wire are difficult to see, and can improve outward appearance, and, can suppress by the sense of insecurity that in translucent outside flexible pipe 22, sets the caused user of coil.

In addition, because of

coil

22d, 22e zinc-plated, more unshowy in forming milky prominent bar 22b, 22e, can more improve outward appearance.

In addition, in the above-described embodiments, prominent bar 22b, the 22c of outside flexible pipe 22 adopt milky, but the resin that is to use the inboard flexible pipe 23 of color coordination also can, in the case, outside flexible pipe 22 shape that streaks can improve design.

Again, prominent bar 22b, the 22c of outside flexible pipe 22 use color and inboard flexible pipe 23 TOTAL DIFFERENT COLOR other color resin also can, in the case, the prominent bar color separately of inboard flexible pipe, outside flexible pipe, outside flexible pipe can be different, constitute three looks, can further improve design.

In addition, the inboard flexible pipe 23 of reason forms air-breathing stream, and forms exhaust flow path between outside flexible pipe 22 and inboard flexible pipe 23, so can not see that in translucent outside flexible pipe 22 dust passes through or thin dust accumulation, can more improve outward appearance.

Again, in the above-described embodiments, in order to constitute

coil

22d, 22e unshowy, prominent bar 22b, 22c adopt milky, and it is zinc-plated at

coil

22d, 22e, if this method, then can not increase the diameter of

coil

22d, 22e, can be simple and

cheap coil

22d, 22e be processed into is unshowy, in addition, and because of the epithelium of the tin electroplated also has electric conductivity, can more improve the electric conductivity of

coil

22d, 22e, but adopt

coat coil

22d, 22e with resinous epitheliums such as milkys structure also can, in addition, also the coating of available white color system is coated in

coil

22d, 22e.

Again, in the present embodiment, in order to make

coil

22d, 22e unshowy, to dash forward bar 22b, 22c is painted, but adopt and the member of the length of outside flexible pipe 22 will dash forward the samely bar 22b, 22c form translucent after, with

coating coil

22d, 22e with the epithelium of colour system with the color of inboard flexible pipe 23, or with also can with methods such as the coating of colour system are coated with the color of inboard flexible pipe 23.

If according to a first aspect of the present invention, form painted projecting strip part at translucent flexible pipe, the flexible pipe shape that streaks can improve design.

If according to a second aspect of the present invention, translucent, that the projecting strip part of outside flexible pipe is painted through the outside flexible pipe employing of duplex, the outward appearance of outside flexible pipe can be improved, and design can be improved.

If according to a third aspect of the present invention, through setting supply lines, make that supply lines is difficult to see at painted projecting strip part, outward appearance can be more improved, and user's sense of insecurity can be suppressed.

If according to a fourth aspect of the present invention, coat supply lines through epithelium with white color system, for example adopt under the milky situation at projecting strip part, supply lines is more difficult to see, and can improve outward appearance, and can suppress user's sense of insecurity.

If according to a fifth aspect of the present invention,, for example adopt under the milky situation at projecting strip part through zinc-plated at this supply lines, can not increase the diameter of supply lines, can be simply and make supply lines more be difficult to see cheaply, outward appearance can be improved, and user's sense of insecurity can be suppressed.

If according to a sixth aspect of the present invention,, can more improve design through the color of the projecting strip part that makes connecting portion and the same colour system of color of inboard flexible pipe.

If according to a seventh aspect of the present invention, adopt the system different through the color of the projecting strip part of connecting portion with the color of inboard flexible pipe, can further improve design.

If according to a eighth aspect of the present invention, adopt duplex through flexible pipe, constitute exhaust flow path and air-breathing stream, outside flexible pipe adopts translucent, make the outward appearance of flexible pipe seem little, can improve outward appearance, and form painted projecting strip part at translucent outside flexible pipe, the flexible pipe shape that streaks can improve design.

If according to a ninth aspect of the present invention, through setting supply lines, make supply lines be difficult to see at painted projecting strip part, outward appearance can be more improved, and user's sense of insecurity can be suppressed.

If according to a tenth aspect of the present invention, coat supply lines through epithelium with white color system, for example adopt under the milky situation at projecting strip part, supply lines is more difficult to see, and can improve outward appearance, and can suppress user's sense of insecurity.

If according to a eleventh aspect of the present invention,, for example adopt under the milky situation at projecting strip part through zinc-plated at supply lines, can not increase the diameter of supply lines, can be simply and supply lines is difficult to see, outward appearance can be improved, and user's sense of insecurity can be suppressed.

If according to a twelveth aspect of the present invention, adopt the system identical through the color of the projecting strip part of connecting portion with the color of inboard flexible pipe, can more improve design.

If according to a thirteenth aspect of the present invention, adopt the system different through the color of the projecting strip part of connecting portion with the color of inboard flexible pipe, can more improve design.

If according to a fourteenth aspect of the present invention, form the inspiratory flow road and at outside flexible pipe with should form exhaust flow path between the flexible pipe of inboard at inboard flexible pipe, because of dust passes through in the inboard flexible pipe, in forming the translucent outside flexible pipe dust not can by or thin dust can not accumulate yet, can more improve outward appearance.

Claims

1. hose for electric vacuum cleaner is made of the double-decker of outside flexible pipe and inboard flexible pipe, and each flexible pipe is made of the back of will long member reeling forms tubular at projecting strip part welding connecting portion flexible hose,

It is characterized in that:

Described internal layer flexible pipe is formed opaque, and described outside flexible pipe is formed translucent, and it is painted to constitute the projecting strip part of connecting portion of member of length of described outside flexible pipe.

2. hose for electric vacuum cleaner as claimed in claim 1 is characterized in that, sets supply lines at the projecting strip part of described connecting portion.

3. hose for electric vacuum cleaner as claimed in claim 2 is characterized in that, coats described supply lines with the epithelium of white color system.

4. hose for electric vacuum cleaner as claimed in claim 2 is characterized in that, has carried out zinc-plated to described supply lines.

5. hose for electric vacuum cleaner as claimed in claim 1 is characterized in that, the color of the projecting strip part of described connecting portion adopts the system identical with the color of inboard flexible pipe.

6. hose for electric vacuum cleaner as claimed in claim 1 is characterized in that, the color of the projecting strip part of described connecting portion adopts the system different with the color of inboard flexible pipe.

7. 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 form from the exhaust flow path of the exhaust gas recirculation of electric fan,

It is characterized in that:

Double-decker with outside flexible pipe and inboard flexible pipe constitutes described flexible pipe, in described internal layer flexible pipe, form in the exhaust flow path, between described outside flexible pipe and described inboard flexible pipe, form exhaust flow path, and described flexible pipe uses the flexible hose that long member coiling back is formed tubulose at projecting strip part welding connecting portion, described inboard flexible pipe is formed opaque and described outside flexible pipe form translucently, and it is painted to constitute the projecting strip part of connecting portion of member of length of outside flexible pipe.

8. electric dust collector as claimed in claim 7 is characterized in that, sets supply lines at the projecting strip part of described connecting portion.

9. electric dust collector as claimed in claim 8 is characterized in that, coats described supply lines with the epithelium of white color system.

10. electric dust collector as claimed in claim 8 is characterized in that, has carried out zinc-plated to described supply lines.

11. electric dust collector as claimed in claim 7 is characterized in that, the color of the projecting strip part of described connecting portion adopts the system identical with the color of inboard flexible pipe.

12. electric dust collector as claimed in claim 7 is characterized in that, the color of the projecting strip part of described connecting portion adopts the system different with the color of inboard flexible pipe.