KR100404453B1 - Electric cleaner - Google Patents

Abstract

The present invention provides an electric vacuum cleaner capable of improving noise reduction efficiency and reducing noise. Returning the intake passage A from the inlet 28 through the extension pipe 27 and the hose 20 to the cleaner main body 1 and the exhaust of the electric blower 12 in the cleaner main body 1 to the inlet 28 In the vacuum cleaner formed with the reflux path B to be made, a part of the exhaust of the reflux path B is provided on at least one of the connection portion 21 or the handle lower operation part 22 of the hose 20 to the cleaner main body 1. The vacuum cleaner in which the exhaust hole 23 which exhausts was formed.

Description

Electric Cleaner {ELECTRIC CLEANER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly, to an exhaust reflux type vacuum cleaner configured to return exhaust gas from an electric blower built in a vacuum cleaner body to a suction port.

In the general vacuum cleaner, the exhaust from the electric blower built into the main body of the cleaner is discharged to the outside from the exhaust port formed on the back of the main body. In addition, the exhaust air blows up the dust on the floor or the carpet, causing the problem of spreading all over the room.

Thus, in order to reduce the exhaust wind discharged from the exhaust port and improve the dust collecting effect, for example, as disclosed in Japanese Utility Model Publication No. 39-36553 or Japanese Patent Application Laid-open No. Hei 9-135795, the hose connected to the cleaner body. A vacuum cleaner has been proposed in which an exhaust passage for refluxing an exhaust from an electric blower to an intake port together with an intake passage at a pipe and a suction port has been proposed.

However, if all of the exhaust from the electric blower is refluxed to the intake port, the refluxed exhaust is sucked again as it is, so that the suction of new air is inhibited, so that the suction efficiency of dust or the like is lowered.

In order to solve the problem, it is conceivable to form an exhaust port in the cleaner body for discharging a part of the exhaust gas to the outside, but noise of the electric blower leaks from the exhaust port, and the problem of noise reduction of the vacuum cleaner cannot be solved. Was.

It is an object of the present invention to provide an electric cleaner that can reduce noise while improving the suction efficiency of a reflux type cleaner in view of the above drawbacks.

1 is an enlarged cross-sectional view showing main parts of an embodiment of the present invention.

2 is an exploded perspective view illustrating main parts of FIG. 1.

3 is a cross-sectional view of the cleaner body of FIG. 1.

4 is a cross-sectional view showing the overall configuration of the vacuum cleaner of FIG.

♣ Explanation of symbols for main part of drawing ♣

1: Vacuum cleaner body 6: Dust collection room

7: Electric blower room 10: Connection

12: electric blower 20: hose

21: Connection part 22: Handle down operation part

23: exhaust hole 24: first breathable sound absorbing material

25: cover 26: second breathable sound absorbing material

The present invention provides a vacuum cleaner main body having a dust collecting chamber and an electric blower chamber in which an electric blower is stored, a flexible hose having a connecting portion connected to a connection port of the cleaner main body at one end, and a handle down operation portion provided at the other end of the hose. An electric vacuum cleaner comprising an extension pipe to be connected, a suction port connected to the extension pipe, and a reflux path for returning the exhaust of the electric blower to the suction port, wherein at least one of the connection part of the hose or the handle down operation part is provided at a reflux path. A vent hole for exhausting a part of the exhaust gas to the outside is formed.

The connecting portion or the handle down operation portion includes a pipe having a pipe to which the hose constituting the intake passage is connected and a pipe having an exhaust hole to which the hose constituting the reflux passage is connected, and a cover covering the connection portion and the exhaust hole of the hose and the pipe. It is preferable to set it as the structure which provided the exhaust path which exhausts a part of exhaust gas to a reflux path between the cover and the hose which comprise the said reflux path.

Moreover, it is preferable to provide a means for exhausting the exhaust to the exhaust path upward with respect to the surface to be cleaned.

It is preferable to provide a breathable sound absorbing material in the exhaust passage.

Preferably, the breathable sound absorbing material and the cover extend from the position where the hose and the pipe are folded to each other from the tip side.

It is preferable to provide a breathable sound absorbing material at a position covering the exhaust port. An embodiment of the present invention will be described in detail below with reference to the drawings.

In the figure, 1 is a cleaner main body, and is comprised by the upper case 2, the lower case 3, and the cover 4 which closes and closes the dust collecting chamber 6 mentioned later. 5 is a partition wall partitioning the inside of the said vacuum cleaner main body 1 back and forth, The front space is the dust collection chamber 6, The rear space is the electric blower chamber 7, The dust collection bag 6 is a dust collection bag 8 And the electric blower described later are housed in the electric blower chamber 7. 9 is a partition wall mounted at intervals between the bottom surface of the lower case 3 and constitutes an outer portion of the cleaner body 1, and is located between the bottom surface of the lower case 3 and the partition wall 9. A reflux path B for refluxing the exhaust of the electric blower 12 described later to the connection port 10 is formed.

10 is a connection port formed in the front part of the cleaner main body 1 and is formed to be slightly upward with respect to the surface to be cleaned so that the connection part 21 of the flexible hose 20 to be described later is detachably connected. The communication port 11 which connects the reflux path B and the reflux path B of the cleaner main body 1 is formed.

12 is an electric blower housed in the electric blower chamber 7, wherein a blower opening 14 is formed in the fan cover 13 to discharge a part of the exhaust from the blower opening 14, and at the same time, the remaining exhaust is discharged to the electric motor unit 12a. Pass the inside to cool the motor unit 12a and discharge it. 15 is a motor cover surrounding the electric blower 12, which cools the opening 16 and the electric motor unit 12a that guide exhaust gas from the blower port 14 of the fan cover 13 to the reflux path B. FIG. It has an opening 17 for guiding one exhaust to the reflux path B.

18 is a cord reel compartment partitioned behind the electric blower chamber 7 of the cleaner body 1, and the cord reel 19 is rotatably housed.

20 is a flexible hose which has a connection part 21 detachably connected to the connection port 10 of the said vacuum cleaner main body 1 at one end, and the handle operation part 22 is provided in the other end. The hose 20 is composed of an inner hose 20a and an outer hose 20b, and the inside of the inner hose 20a is an intake flow path A, and a return path between the inner hose 20a and the outer hose 20b ( B).

As shown in FIG. 1, the connection part 21 is formed of an inner pipe 21a and an outer pipe 21b, and the inner hose 20a is screwed to the outer circumference of the inner pipe 21a and the outer pipe The outer hose 20b is screwed to the outer circumference of the 21b.

23 is a plurality of exhaust holes provided in the outer pipe 21b, and is formed on the position where the outer hose 20b of the outer pipe 21b is inserted into the connector 10 rather than the position where the outer hose 21b is screwed, and the inner pipe 21a. ) And part of the exhaust gas passing through the reflux path B formed between the outer pipe 21b and the outer pipe 21b.

24 is a first breathable sound absorbing material made of a material having breathability and sound absorbing properties such as urethane provided at a position covering the exhaust hole 23 of the outer circumference of the outer pipe 21b, and the exhaust from the exhaust hole 23 is the first breathable sound absorbing material. By passing through (24), the exhaust velocity is reduced, and at the same time, the first breathable sound absorbing material (24) absorbs the wind sound generated in the exhaust holes (23). The first breathable sound absorbing material 24 attaches a gap between the first breathable sound absorbing material 24 and the outer pipe 21b such that the exhaust gas from the exhaust hole 23 does not pass through, and exhausts the exhaust air from the exhaust hole 23. The speed of the exhaust wind from the exhaust hole 23 can be reliably lowered by passing through the first breathable sound absorbing material 24 reliably.

25 is a cover which covers the screw joint part of the said outer hose 20b and the outer pipe 21b, and a pair of parts are mutually engaged and integrated, and the said exhaust gas is between the cover 25 and the outer hose 20b. An exhaust path of the exhaust from the ball 23 is formed.

26 is a second breathable sound absorbing material made of a material having air permeability, sound absorption and elasticity, such as urethane, which is attached to the inner surface of the cover 25, and adheres to the inner surface of the cover 25 and at the same time the inner and outer hoses of the cover 25 It is formed thicker than the interval of the outer surface, and is mounted at the same time as the mounting of the cover 25, in the mounting state between the cover 25 and the second breathable sound absorbing material 26 and the outer hose 20b and the second breathable sound absorbing material 26. It is in close contact with each other. The cover 25 and the second breathable sound absorbing material 26 cover the hose 20 from the inner pipe 21a and the outer pipe 21b to the tip position. Since the said handle downward operation part 22 is the structure similar to the connection part 21 mentioned above, description is abbreviate | omitted.

27 is an extension tube detachably connected to the handle operating portion 22 of the hose 20. An inner cylindrical portion 27a forming an intake passage A having a substantially circular cross section, and the inner cylindrical portion 27a. And a portion formed integrally with the outer cylindrical portion 27b formed to cover the inner cylindrical portion 27a, the inner cylindrical portion 27a having an intake passage A, and the inner cylindrical upper portion. A substantially crescent-shaped space formed between the 27a and the outer cylindrical portion 27b is the reflux path B. As shown in FIG.

28 is a suction port which is detachably connected to the extension pipe 27, and blows back the exhaust gas flowing through the hose 22 and the extension pipe 27 to the surface to be cleaned to raise dust and the like on the surface to be cleaned to improve the suction efficiency. It is supposed to be.

However, in the exhaust reflux type vacuum cleaner configured as described above, air mixed with dust and the like suctioned through the suction port 28 by suction of the electric blower 12 includes an intake flow path A of the extension pipe 27 and a hose ( It is sucked into the cleaner main body 1 through the intake flow path A of 20).

Part of the exhaust from the electric blower 12 is discharged from the blower 14 formed in the outer circumferential portion of the fan cover 13, and the cleaner body 1 is discharged through the opening 16 of the motor cover 15. It is refluxed to the reflux path B formed on the lower side, and the remaining exhaust is refluxed to the reflux path B via the opening 17 of the motor cover 15 after cooling the motor unit 12a. The exhaust gas returned to the reflux path B is refluxed to the reflux path B of the hose 20 via the communication port 11 formed in the connection port 10 of the cleaner body 1.

A part of the exhaust gas returned to the reflux path B of the connecting portion 21 is formed from the exhaust hole 23 of the outer pipe 21b of the connecting portion 21 by the first breathable sound absorbing material 24 and the second breathable sound absorbing material 26. It is exhausted to the outside through the. The exhaust velocity from the exhaust hole 23 decreases in speed while passing through the reflux path B of the cleaner body 1, and also via the first breathable sound absorbing material 24 and the second breathable sound absorbing material 25. Since it exhausts, the speed | rate of exhaust exhausts further and it is prevented to blow up the dust etc. on the to-be-cleaned surface by the exhaust from the connection part 21. In addition, the connection port 10 is formed to be slightly upward with respect to the surface to be cleaned, and it is possible to reliably prevent dust or the like on the surface to be cleaned from being blown up by the exhaust from the connection portion 21.

The wind noise when passing through the exhaust hole 23 in the reflux path B is absorbed by the first breathable sound absorbing material 24 and at the same time, the noise is blocked by the cover 25 to reduce most leakage to the outside. have. In addition, the noise of the electric blower 12 is greatly attenuated while passing through the reflux path B of the cleaner main body 1, so that it does not leak from the exhaust hole 23 and does not cause discomfort to the user.

In addition, the exhaust gas which has risen in temperature by cooling the electric motor unit 12a of the electric blower 12 is cooled while passing through the reflux path B of the cleaner body 1, and further includes the first breathable sound absorbing material 24 and Since it is cooled by the second breathable sound absorbing material 26, the exhaust gas exhausted from the connecting portion 21 is sufficiently cooled, and the unpleasant feeling applied by the temperature of the exhaust wind can be reduced.

In addition, a part of the exhaust of the reflux path B is similarly exhausted from the handle downward operation part 22 of the hose 20.

The remaining exhaust refluxed to the reflux path (B) of the hose 20 passes through the reflux path (B) of the extension pipe 27, is refluxed to the inlet port 28, is blown out to the surface to be cleaned to blow off dust and the like, It is sucked into the intake air passage A together with dust and new outside air. By forming the exhaust hole 23 and exhausting a part of the reflux exhausted to the outside, the suction port 28 can efficiently suck dust and the like together with the new outside air, thereby improving the suction efficiency.

The refluxed exhaust gas increases in temperature when cooling the electric motor unit 12a of the electric blower 12, so that the temperature gradually increases with use, but the connection part 21 and the handle down operation part 22 of the hose 20 By exhausting a part of the reflux air and sucking the new outside air, it is possible to lower the temperature of the reflux air and to reduce the durability of the temperature of each component constituting the vacuum cleaner.

In addition, as the cleaning is performed, the hose 20 is bent with respect to the connecting portion 21 and the handle down operation part 22, and particularly, at the screwing portion of the outer pipe 21b, the outer hose 20b is bent. There is a problem that the outer hose 20b is most likely to be damaged at this portion, but since the second breathable sound absorbing material 26 covers this portion, the bending of the outer hose 20b is alleviated, so that the outer hose 20b is Breakage can be prevented.

In addition, in the said embodiment, while the hose 20 consists of the inner hose 20a and the outer hose 20b, the connection part 21 of the hose 20 consists of the inner pipe 21a and the outer pipe 21b. However, the hose may be configured by arranging the hose constituting the intake passage and the hose constituting the reflux passage, and at the same time, connecting the pipe constituting the intake passage and the pipe constituting the reflux passage.

In addition, although the connection opening 10 of the cleaner main body 1 was formed slightly upward with respect to the surface to be cleaned, the exhaust from the connection portion 21 was formed so that dust and the like on the surface to be cleaned were not blown up, but the connection portion of the hose was directed upward. It may be formed smoothly, and other structures such as forming a guide for guiding the exhaust from the connecting portion upward may be used.

In addition, although it is comprised so that exhaust may be exhausted from both the connection part 21 and the handle down operation part 22, you may make it the structure which exhausts only one of the connection part 21 and the handle down operation part 22 only.

According to the configuration of claim 1 of the present invention, by exhausting a part of the refluxed exhaust to the outside, the suction port can be efficiently sucked with the new air, and the exhaust hole can be reduced while improving the efficiency of the exhaust connection. In this case, the exhaust port of the vacuum cleaner main body can be removed, the noise of the electric blower from the exhaust port can be eliminated, and the noise can be reduced.

Moreover, according to the structure of Claim 2 of this invention, the noise of an exhaust hole can be prevented using the cover which covers the connection part of a hose and a pipe, and it can achieve the effect of low noise, etc. .

According to the structure of Claim 3 of this invention, the effect of being able to prevent the dust etc. of the surface to be cleaned which blown off by the exhaust from an exhaust path can be achieved.

According to the structure of Claim 4 of this invention, while the air-absorbing material reduces the speed | rate of the exhaust wind to exhaust, it can prevent the dust of the surface to be cleaned etc. blown out by the exhaust air, but the noise of an exhaust hole is made by the air-absorbing sound absorbing material. Can be absorbed to achieve low noise.

According to the structure of Claim 5 of this invention, the bend of a hose can be alleviated with a breathable sound absorbing material, and the effect of being able to prevent damage to a hose can be acquired.

According to the structure of Claim 6 of this invention, while the air-absorbing material can reduce the speed | rate of the exhaust wind to a non-air, it can prevent the dust etc. of the surface to be cleaned blown up by the exhaust air, It can absorb the noise and achieve low noise.

Claims (6)

A vacuum cleaner body having a dust collecting chamber and an electric blower chamber for storing an electric blower, a flexible hose having a connecting portion connected to a connection port of the cleaner body at one end thereof, and an extension pipe connected to a handle down operation portion provided at the other end of the hose. And an intake port connected to the extension pipe, and a reflux path for returning the exhaust of the electric blower to the intake port, wherein at least one of the connection portion of the hose or the handle down operation part includes a part of the exhaust flow to the reflux path. An electric cleaner, comprising: an exhaust hole for exhausting the gas to the outside. The method of claim 1, The connection part or the handle down operation part comprises a pipe having a pipe to which the hose constituting the intake passage is connected and a pipe having an exhaust hole to which the hose constituting the reflux passage is connected, and a cover covering the connection portion and the exhaust hole of the hose and the pipe. And an exhaust path for exhausting a part of exhaust gas to the reflux path between the hose and the cover constituting the reflux path. The method of claim 2, And a means for exhausting the exhaust to the exhaust surface upward with respect to the surface to be cleaned. The method of claim 2, An electric vacuum cleaner, wherein a breathable sound absorbing material is provided in the exhaust passage. The method of claim 4, wherein The breathable sound absorbing material and the cover is an electric cleaner, characterized in that formed from the position where the hose and the pipe are nested with each other. The method of claim 2, A vacuum cleaner provided with a breathable sound absorbing material in a position covering the exhaust port.