JP2000262445A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of a double hose to form an air suction flow passage and an air discharge flow passage in a vacuum cleaner of discharged air circulation type. SOLUTION: In the vacuum cleaner in which an air discharge flow passage B to circulate the air discharged from a motor-driven blower 5 is formed together with an air suction flow passage A in a hose 2, a pipe and a suction piece to be connected to a vacuum cleaner body 1 with the blower 5 built therein, the hose 2 is of double structure, a flexible hose (one-layer and two-wire hose 2a) in which a coil wire 21 with the electric conductivity and shape keeping property is built is used for an internal hose to form the air discharge flow passage A, and a flexible hose (a conduit hose 2b) in which no coil wire is built is used for an external hose to form the air suction flow passage B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly to an exhaust gas recirculation (circulation) in which exhaust gas from an electric blower built in a vacuum cleaner body is returned to a floor suction tool or the like via a hose and a pipe. ) -Type vacuum cleaner.

[0002]

2. Description of the Related Art In general floor moving type vacuum cleaners,
All exhaust air from the electric blower built into the cleaner body is exhausted to the outside through exhaust ports formed on the rear side of the cleaner body.

That is, dust sucked together with air from a floor suction tool or the like is taken into the cleaner body via pipes and hoses, and the air from which dust has been removed by a paper pack or the like cools the motor of the electric blower. Thereafter, the air is discharged to the outside from the exhaust port. However, since all of the exhaust air from the electric blower is discharged, the air is blown to the outside with considerable force. Therefore, there is a problem that dust stagnates on the floor or carpet due to the exhaust wind soars and diffuses into the room.

For the purpose of reducing the exhaust air blown out to the outside and increasing the dust collecting effect, for example, Japanese Utility Model Publication No. 39-36553 and Japanese Unexamined Patent Publication No. Hei 9-135 have disclosed a conventional method.
As disclosed in Japanese Patent Application Publication No. 795 and the like, an exhaust passage for returning a part or all of exhaust from the electric blower is formed in a hose, a pipe, and a suction tool connected to the cleaner body together with the intake passage. An electric vacuum cleaner comprising:

[0005] In the above, the hose and the pipe are constructed in a double structure so that an intake passage is formed inside and an exhaust passage is formed outside.

[0006]

As described above, in the exhaust gas recirculation type vacuum cleaner, the hose needs to have a double structure. However, a relatively heavy hose, which is generally referred to as a single-layer two-wire hose and has a coil wire or the like having conductivity (for use as a signal line or the like) or shape-retaining property, is used as a hose of a vacuum cleaner. I have. Therefore, when such a hose is doubled, the weight of the whole hose becomes excessively large and the operability is deteriorated, so that there is a problem that practical use is difficult.

Although the exhaust gas passes through the outer flow path of the double structure, the exhaust gas discharged from the electric blower is cooled and heated by the motor. When passing through the flow path, the outer surface temperature of the double hose increases, which causes a problem in terms of usability.

Therefore, the present invention has been made to solve such a problem, and aims to reduce the weight of a double hose forming an intake passage and an exhaust passage in an exhaust gas recirculation type vacuum cleaner. The purpose is to do so.

It is another object of the present invention to suppress a rise in temperature of the outer surface of the double hose due to exhaust heat.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an electric blower, together with an intake passage, provided with a hose, a pipe, and a suction tool connected to a cleaner body having a built-in electric blower. A vacuum cleaner comprising an exhaust flow path for recirculating exhaust air from the vacuum cleaner, wherein the hose has a double structure, and a conductive wire is provided inside the inner hose forming an intake flow path. A flexible hose having no conductive wire is used as an outer hose forming an exhaust passage.

[0011] The present invention also provides a vacuum cleaner in which a hose, a pipe, and a suction tool connected to a cleaner body having a built-in electric blower are provided with an intake flow path and an exhaust flow path for recirculating exhaust gas from the electric blower. The hose has a double structure, and a flexible hose having a shape retaining means is used for an inner hose forming an intake passage, and a shape retaining means is used for an outer hose forming an exhaust passage. Characterized by using a flexible hose that does not include a flexible hose.

Further, a bellows-like hose having fine irregularities is used as the outer hose.

Further, one end of the double-structured hose is attached to a hose insertion port of the cleaner body, and the other end is attached to an inner hose mounting end of a double-structured connection pipe used for attaching to a hose grip portion. Are projected outward from the outer hose mounting end.

Further, the inner hose is made opaque, while the outer hose is made transparent.

In addition, the pipe is provided with an inner cylindrical portion forming an intake passage having a substantially circular cross section, and a part of the inner cylindrical portion is formed integrally with the pipe so as to cover the inner cylindrical portion. And an outer cylindrical portion forming a flow path.

Further, the exhaust pipe of the pipe has a substantially crescent shape in cross section, and the outer cylindrical portion of the pipe is formed in a substantially circular cross section.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described in detail with reference to FIGS.

As shown in FIG. 1, the floor-moving type vacuum cleaner to which the present invention is applied comprises a cleaner body 1, a hose 2, a connecting pipe 3, a floor suction tool 4, and the like.

An electric blower 5 for suction is provided in the cleaner body 1.
Motor room 6 containing paper and paper pack 7 and fine dust filter 8
And a dust collection chamber 9 using the same.

An exhaust port 11 for discharging a part of the exhaust air from the electric blower 5 to the outside through an exhaust filter 10 is formed on the back side of the cleaner body 1.

Then, a part of the cleaner body 1, a hose 2,
The connecting pipe 3 and the floor suction tool 4 have a dual structure of a flow path, are divided into an intake flow path A and an exhaust flow path B, and are configured to communicate with each other.

That is, an exhaust passage B for recirculating a part of the exhaust air from the electric blower 5 is formed below the dust collecting chamber 9 and the electric motor room 6 of the cleaner body 1. B
Is connected to an exhaust passage B of a hose joint section 20 attached to the hose insertion port 12 of the cleaner body 1.

The hose joint 20 has a double structure in which the connecting pipes 20a and 20b are concentric.
Is formed such that both ends of an inner connection pipe 20a projecting from the main body 1 are inserted into the mounting portion 7a of the paper pack 7 and one end of the exhaust pipe B formed by the outer connection pipe 20b. It is configured to communicate with the exhaust passage B on the side.

One end of a hose 2 having a double structure is attached to the other ends of the connection pipes 20a and 20b. This hose 2 is an opaque flexible material for a general vacuum cleaner in which a coil wire 21 having a conductive property (to be used as a signal wire or the like) and a shape-retaining property called a one-layer two-wire hose is provided inside. A hose 2a is used. On the outside, a coil wire 21 is provided inside the inner hose 2a, and the coil wire is unnecessary on the outside. A flexible hose 2b is used. The conduit hose 2b has the advantage that it is lightweight because the coil wire 21 is not installed unlike the one-layer two-wire hose 2a, and is a bellows-like hose with fine irregularities, so that the hose surface area is large and the heat dissipation is good. There is. In the present embodiment, the conduit hose 2b is formed of a translucent resin.

As described above, the relatively heavy one-layer two-wire hose 2a in which the coil wire 21 is provided inside the small-diameter inner hose.
By using the lightweight conduit hose 2b for the outer hose having a large diameter, the weight of the double hose 2 can be significantly reduced.

The outer conduit hose 2b that forms the exhaust passage B is a bellows-like hose having a small unevenness as described above, and has a large hose surface area and good heat dissipation, so that the outer surface of the double hose due to the exhaust heat can be used. Temperature rise can be suppressed. By suppressing the rise in temperature of the outer surface of the double hose in this way, the temperature does not rise to such a degree that the user feels uncomfortable, so that usability is improved.

Further, by making the inner one-layer two-wire hose 2a opaque and the outer conduit hose 2b translucent, the appearance can be improved by the appealing effect on the design, and the double hose 2 can be made of a normal hose. It is thicker than the hose, but because the outer conduit hose 2b is translucent,
The appearance of the inner one-layer two-wire hose 2a makes it relatively thin. In addition, the inner one layer 2 through which dust passes
The wire hose 2a is made opaque, and the outer conduit hose 2b through which clean air containing no dust after dust collection passes is made translucent, so that dust adhering to the inner surface of the inner one-layer two-wire hose 2a cannot be seen. Since the inner surface of the outer conduit hose 2b is not stained, the appearance of the double hose 2 is not impaired.

The hose 2 is an inner one-layer two-wire hose 2
a is screwed into a screw-shaped rib 22 on the outer surface of the protruding end of the inner connection pipe 20a, and is mounted and fixed. Then, the outer conduit hose 2b is mounted and bonded to the outer connection pipe 20b. The mounting portion of the hose 2 is covered with a cylindrical protective cover 23.

In the above description, when the one-layer two-wire hose 2a which is inside and is difficult to be attached is attached to the inside connection pipe 20a, the hose attachment end is connected to the outside connection pipe 20a.
Since the outer connecting pipe 20b protrudes outward from the hose mounting end b, the outer connecting pipe 20b can be mounted relatively easily without obstruction, and the assembling process of the double hose 2 is simplified.

The inner and outer connection pipes 20a and 20b in the above-mentioned hose joint portion 20 are partially connected by a rib or the like (not shown) to form a concentric double structure.

The other end of the hose 2 is connected to a connection pipe 24 formed integrally with a grip portion 24 for hand operation.
a and 24b are mounted and fixed in the same manner as described above. That is, the inner one-layer two-wire hose 2a is screwed into the threaded rib 25 formed on the outer surface of the protruding end of the inner connecting pipe 24a, and is mounted and fixed, and then the outer conduit hose 2b is connected to the outer connecting pipe 24a. It is attached to and bonded to the pipe 24b. The mounting portion of the hose 2 is also covered with a cylindrical protective cover 26.

In this case, as described above, the one-layer, two-wire hose 2a which is hard to be attached inside is connected to the inner connecting pipe 24a.
When the hose is attached to the outer connection pipe 24b, the outer connection pipe 24b can be attached relatively easily without obstruction since the hose attachment end projects outside the hose attachment end of the outer connection pipe 24b. The assembly process of the hose 2 is simplified.

The grip portion 24 has a configuration in which a partition wall portion 28 for separating the intake flow path A and the exhaust flow path B at the suction port 27 to which the connecting pipe 3 is mounted is recessed by a predetermined distance. . Above the suction port 27, a clamp 29 for mounting and fixing the connecting pipe 3 is provided.

When the one-layer two-wire hose 2a is set inside, the wiring process for connecting the coil wire 21 to the operation board 24c of the grip portion 24 cannot be performed as in the conventional case. Since the connection pipes 24a and 24b are formed integrally with the grip portion 24, the coil wire 21 can be connected to the operation base 24c via the cable 21a as shown in FIG.

On the other hand, as shown in FIG. 5, each of the connecting pipes 3 has an inner cylindrical portion 3a forming an intake passage A having a substantially circular cross section, and the inner cylindrical portion 3a and the upper portion are integrally formed. Exhaust passage B so as to cover the inner cylindrical portion 3a.
And an outer cylindrical portion 3b forming the same.

Since the exhaust gas passing through the exhaust passage B is clean air from which dust has been removed through the paper pack 7 and the fine dust filter 8 of the cleaner body 1, the inner cylindrical portion 3a
Noting that it is not necessary to form a substantially circular section in consideration of dust clogging as in
Is formed in a substantially crescent shape in cross section, and the outer cylindrical portion 3b is formed to be substantially circular in cross section.

As a result, the upper part is integrated,
Since it is possible to achieve weight reduction and slimness, and since the inside and outside have a substantially circular cross section, the operability is excellent without impairing the strength. Therefore, the connecting pipe 3 of the present embodiment
Has almost the same shape and operability as the conventional air-intake-only air intake.

A cover 32 for covering the cable and the connecting clamp 31 is provided on the upper part of the connecting pipe 3 as in the prior art.
Is installed.

In the connection pipe 3, another one is used.
On the side of the suction port 33 for connecting the connecting pipes 3 and for connecting the floor suction tool 4, a partition wall portion (the inner wall portion of the inner cylindrical portion 3a) 34 separating the intake passage A and the exhaust passage B is predetermined. It is configured to be recessed by the distance.

On the other hand, the other end of the connecting pipe 3 corresponds to the suction port 27 of the grip portion 24 and the suction port 33 side of the connecting pipe 3, and the outer cylindrical portion 3 b has an inner circumferential surface on the suction port 27, 33 side. The protrusions 35 are formed on the upper portion so as to engage with the clamps 29 and 31, and are fitted until the clamps 29 and 31 engage with the protrusions 35. The end of the inner cylindrical portion 3a is the suction port 27,
The partition walls 28 and 34 are formed so as to be in close contact with the opening edges 28a and 34a of the partition walls 28 and 34 that are recessed toward the 33 side.

The joint pipes 4a and 4b of the floor suction tool 4 are formed in a concentric double structure.
Are formed in the same manner as described above.

When the electric vacuum cleaner constructed as described above is used, the air blown by the electric blower 5 causes the air mixed with dust sucked from the floor suction tool 4 to flow into the connecting pipe 3.
, And is taken into the cleaner body 1 through the suction passage A of the hose 2. In the main body 1, dust is removed by the paper pack 7, and the purified air is sucked into the electric blower 5 through the fine dust filter 8 to cool the motor 5 a.

A part of the exhaust air from the electric blower 5 is exhausted to the outside through the exhaust port 11 of the main body 1, and the others are exhausted from the exhaust flow path B of the main body 1 to the exhaust flow path B of the hose 2 and the exhaust of the connecting pipe 3. After passing through the flow path B, the air flows back to the floor suction device 4 and circulates again to the intake flow path A of the connecting pipe 3 together with the dust soared by the exhaust air.

As described above, in the exhaust gas recirculation type vacuum cleaner according to the present embodiment, the hose 2 through which the intake channel A and the exhaust channel B pass is significantly reduced in weight, the surface temperature is suppressed, and the connecting pipe is further reduced. 3 can be made lighter and slimmer, etc.
The advantages of the exhaust gas recirculation system can be embodied practically.

That is, by circulating a part of the exhaust gas, the exhaust air blown out to the outside is reduced and weakened, so that dust in the room being cleaned can be effectively prevented from rising.

In addition, there is air that circulates many times, so that the exhaust air itself discharged to the outside is further purified by the paper pack 7, the fine dust filter 8, and the like. In addition, exhaust port 1
Since the flow velocity of the exhaust air blown out from the air outlet 1 is also reduced, the filter efficiency of the exhaust filter 10 is improved, and the exhaust gas is more effectively cleaned. This is consistent with the recent trend toward cleanliness.

In the above-described embodiment, the single-layer two-wire hose 2a having the inner hose with the coil wire 21 having conductivity and shape-retaining property is used. However, the present invention is not limited to this. A hose with signal wires and power wires (for power brushes) called wire hoses, or a conductive wire (copper wire, etc.) with little shape retention, and the hose itself has shape retention. The present invention is also applicable to those having a coiled member (shape retaining means) made of metal or synthetic resin and having shape retaining properties.

The outer hose (conduit hose 2)
Although b) is translucent, the same function and effect as described above can be obtained if transparency is provided regardless of translucency or transparency.

[0049]

As described above, according to the present invention, the hose has a double structure, and a flexible hose having a conductive wire is used as the inner hose forming the intake passage. By using a flexible hose that does not include a conductive wire for the outer hose that forms the path, a relatively heavy hose that has a conductive wire provided for the inner hose with a small diameter is used,
Since a light-weight hose without a conductive wire inside the large-diameter outer hose will be used, it is possible to significantly reduce the weight of the double hose that passes through the intake flow path and the exhaust flow path. Practical application of the vacuum cleaner becomes easy.

In addition, the hose has a double structure, and a flexible hose having a shape retaining means is used for the inner hose forming the intake passage, and the flexible hose is used for the outer hose forming the exhaust passage. By using a flexible hose that does not incorporate the shape means, a relatively heavy hose with the shape retaining means installed inside the small diameter inner hose is used, and a lightweight hose without the shape retaining means installed inside the large diameter outer hose. Is used, it is possible to significantly reduce the weight of the double hose through which the intake passage and the exhaust passage pass, and it becomes easy to put the exhaust recirculation type vacuum cleaner into practical use.

Further, the use of a bellows-like hose with fine irregularities for the outer hose increases the surface area of the hose and improves heat dissipation, so that the temperature rise on the outer surface of the double hose due to exhaust heat can be suppressed. Therefore, the temperature does not rise to such a degree that the user feels uncomfortable, and the usability is improved.

Also, one end of the double-structured hose is attached to the hose insertion port of the cleaner body, and the other end is attached to the inner hose mounting end of the double-structured connection pipe used for attaching to the hose grip portion. When the inner hose, which is difficult to install, is attached to the outside hose installation end by projecting outward from the outer hose installation end, the hose connection end of the inner connection pipe projects outside the hose installation end of the outer connection pipe. Can be attached relatively easily without obstruction, and the assembly process of the double hose is simplified.

The inner hose is made opaque while the outer hose is made transparent, so that the appearance can be improved by the appealing effect on design, and the double hose becomes thicker than a normal hose. However, since the inner hose is seen through the transparent outer hose, the inner hose becomes relatively thin. Also, since the inner hose through which dust passes is made opaque, and the outer hose through which clean air that does not contain dust after passing through is made translucent, dust adhering to the inner surface of the inner hose cannot be seen. Since the inner surface is not stained, the appearance of the double hose is not impaired.

Further, the pipe is provided with an inner cylindrical portion forming an intake passage having a substantially circular cross section, and an exhaust flow is formed so as to be integrally formed with the inner cylindrical portion and to cover the inner cylindrical portion. By using the outer cylindrical portion that forms the passage, the pipe through which the intake passage and the exhaust passage pass can be reduced in weight and slim without fear of dust clogging. It becomes easier.

Further, by forming the exhaust passage of the pipe to have a substantially crescent-shaped cross section and forming the outer cylindrical portion of the pipe to have a substantially circular cross section, the pipe has a substantially similar shape without a sense of incongruity as compared with the conventional intake only. And operability.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment in which the present invention is applied to a general floor-moving vacuum cleaner, and an intermediate portion of a hose is omitted for convenience of illustration.

FIG. 2 is an enlarged sectional view of the main body of the cleaner shown in FIG. 1;

FIG. 3 is an enlarged sectional view of a hose joint part.

FIG. 4 is an enlarged sectional view of a hose grip portion.

FIG. 5 is a configuration diagram of a connecting pipe in the embodiment,
(A) is a longitudinal sectional view, (b) is an AA sectional view of (a), (c) is a side view, (d) is an end view of one end side of (c), and (e) is Similarly, an end view of the other end side is shown, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Hose 2a 1 layer 2 wire hose (inner hose) 2b Conduit hose (outer hose) 3 Connecting pipe 3a Inner cylindrical part 3b Outer cylindrical part 4 Floor suction tool 5 Electric blower 5a Motor 6 Motor room 7 Paper pack 9 Dust collection chamber 11 Exhaust port 20 Hose joint part 20a, 20b Connection pipe 21 Coil wire 24 Hose grip part 24a, 24b Connection pipe A Intake flow path B Exhaust flow path

Continued on the front page (72) Inventor Sadaki Kodera 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Toshiyuki Fujiyoshi 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Inside Sanyo Electric Co., Ltd. (72) Yoshihiro Mori 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Prefecture Inside Sanyo Electric Co., Ltd. (72) Takahiro Nishiyama 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F-term (reference) 3B006 BA05 BA07 3B057 BA07 BA09 BA22 BA24 BA25 BA34

Claims (7)

[Claims] 1. An electric vacuum cleaner comprising: a hose, a pipe, and a suction tool connected to a main body of a vacuum cleaner having a built-in electric blower, and an exhaust flow path for recirculating exhaust air from the electric blower together with an intake flow path. The hose has a double structure, and a flexible hose having a conductive wire is used for an inner hose forming an intake passage, and a conductive wire is provided for an outer hose forming an exhaust passage. An electric vacuum cleaner characterized by using a flexible hose that is not used. 2. A vacuum cleaner comprising: a hose, a pipe, and a suction tool connected to a cleaner body having a built-in electric blower; and an exhaust passage for recirculating exhaust gas from the electric blower together with an intake passage. The hose has a double structure, and a flexible hose having a shape retaining means is used for an inner hose forming an intake flow path, and a shape retaining means is used for an outer hose forming an exhaust flow path. An electric vacuum cleaner characterized by using a flexible hose that does not include the interior. 3. The vacuum cleaner according to claim 1, wherein a bellows-like hose having fine irregularities is used as the outer hose. 4. An inner hose mounting end of a double-structure connection pipe used to mount one end of the double-structured hose to a hose insertion port of a cleaner body and the other end to a hose grip portion. The vacuum cleaner according to any one of claims 1 to 3, wherein the first and second protrusions protrude outside the outer hose mounting end. 5. The vacuum cleaner according to claim 1, wherein the inner hose is made opaque while the outer hose is made transparent. 6. The exhaust pipe includes an inner cylindrical portion forming an intake passage having a substantially circular cross section, and an inner cylindrical portion formed integrally with the inner cylindrical portion and covering the inner cylindrical portion. The vacuum cleaner according to any one of claims 1 to 5, comprising an outer tubular portion forming a flow path. 7. The vacuum cleaner according to claim 6, wherein an exhaust passage of the pipe has a substantially crescent cross section, and an outer cylindrical portion of the pipe has a substantially circular cross section.