JP2000189357A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of a partition wall between a dust collecting chamber and an air circulating duct by forming the air circulating duct to pass through the dust collecting chamber, and forming a reinforcement part formed by a projecting part on a partition wall partitioning the air circulating duct and the dust collecting chamber. SOLUTION: By sucking a dust collecting chamber 6 by a motor-driven fan 18, negative pressure is generated in the dust collecting chamber 6 and positive pressure is generated in an air circulating duct 8. When the suction air passing through a dust collecting fan 16 passes through the inside of the motor-driven fan 18, it takes heat off the motor to be heated. A partition wall part 31 easily deforms by heating and a pressure difference of negative and positive pressures. However, a semi-elliptical sectional reinforcement part 32 is projected toward the dust collecting chamber 6 to prevent deformation of the partition wall part 31, and close adhesion of a dust collecting bag 9 can be prevented by using the reinforcement part 32 to prevent lowering of dust collecting effect. Though the reinforcement part 32 of the projecting part is formed in an intake duct 8 in the dust collecting chamber 6, the suction air in the dust collecting chamber 6 passes through the inside of the dust collecting bag causing no large duct resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner having a circulating air passage for circulating exhaust air from an electric blower comprising a dust collecting fan and a motor to a suction opening.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner is provided with an electric blower comprising a dust collecting fan and an electric motor, and the air sucked by the dust collecting fan is cooled by passing through the electric motor. Has a structure for exhausting air from the housing opening. The exhaust air from the electric blower is exhausted into the outside air from a rear exhaust port of the electric vacuum cleaner.

[0003] Some recent vacuum cleaners circulate and supply the exhaust air from the electric blower to a suction port connected to the cleaner body. The vacuum cleaner that circulates the exhaust air of the electric blower to the suction port body blows the circulating exhaust gas to blow out dust adhering to the floor surface, thereby improving the dust suction efficiency, and improving the floor efficiency of the suction port body. It is excellent in that the adhesion to the surface can be prevented and the running performance of the suction port body can be improved. There is also the advantage of reducing emissions. The circulating exhaust may be the source of power for the rotating brush.

[0004] A circulation air path for circulating the exhaust air of the electric blower to the suction opening body passes through a side portion of the dust collection chamber storing the dust collection bag from the electric blower room storing the electric blower in the cleaner body. A circulation air passage for circulating exhaust gas is formed in an extension pipe having a suction air passage or a connection pipe of a suction port body. Alternatively, a blowing air path for blowing the rotating brush is formed.

[0005]

However, in the cleaner body having the above-described circulating air path, the pressure difference between the dust collecting chamber side, which becomes negative pressure during cleaning, and the circulating air path side, which becomes positive pressure, is large. Therefore, there is a problem that a partition wall for partitioning the dust collection chamber and the circulation wind path is deformed. Also, for example, when the gap nozzle is used or when the suction port is closed, the air volume decreases and the temperature rises, and the partition wall that separates the dust collection chamber and the circulation air passage is deformed by heat. There was also the problem of doing.

The present invention has been made in view of such a problem, and is provided with a vacuum cleaner provided with a circulating air passage for circulating exhaust air from an electric blower provided in the cleaner body to a suction port side. In the above, the first object is to prevent deformation of the partition wall between the dust collection chamber and the circulation air passage, and furthermore, the dust collection bag of the dust collection chamber does not become resistant to the exhaust passing through the circulation air passage. A second object is to prevent the dust suction efficiency from being lowered by being in close contact with the partition wall.

[0007]

In order to achieve the first object, a vacuum cleaner according to a first aspect of the present invention includes a cleaner main body of the vacuum cleaner, which is configured to remove exhaust gas passing through an electric blower. In a vacuum cleaner having a circulating air passage for circulating and supplying the air to a suction port connected to a main body, the circulating air passage is configured to pass through a side portion of a dust collection chamber. A partition wall that separates the road and the dust collection chamber is provided with a reinforcing portion formed of a convex portion.

[0008] In order to achieve the second object in addition to the first object, a vacuum cleaner according to a second aspect of the present invention is the vacuum cleaner according to the first aspect, wherein the protrusions of the reinforcing portion are gathered. It is characterized in that it has a rib shape protruding toward the inside of the dust chamber.

[0009]

FIG. 1 shows a schematic configuration of a vacuum cleaner according to an embodiment of the present invention. The vacuum cleaner main body 1 is of an upright type. That is, a rotatable handle 3 is provided on the upper part of the housing 2 of the cleaner body 1, and the handle shown in FIG. 1 and the handle 3 are turned straight upward by turning the handle 3 upward from this state. It can be fixed with the state. The handle 3 is gripped for cleaning, and a switch for turning on and off the electric blower is provided at the tip end, not shown. A suction port 4 is detachable at a lower portion of the cleaner main body 1, and a fixed handle portion 5 for lifting the cleaner main body 1 is formed at an upper portion of the cleaner main body 1.

Inside the cleaner body 1, a dust collecting chamber 6, an electric blower storage chamber 7, and a circulation air passage 8 are provided.
The dust collecting chamber 6 houses a dust collecting bag 9 for filtering air containing dust sucked from the suction port body 4. A connection port 11 into which the connection pipe 10 of the suction port body 4 is inserted is formed at a lower portion of the dust collection chamber 6, and a grid wall 12 is formed at an upper portion of the dust collection chamber 6.
, A negative pressure adjusting air passage 13 and an electric blower storage room 7 are formed. A filter 14 made of, for example, a non-woven fabric or a foamed polyurethane foam is attached to the lattice wall portion 12, and the air that has passed through the dust collection bag 9 is filtered. A leak valve 15 is provided at an end of the negative pressure adjusting air passage 13, and when the negative pressure becomes higher than a set value, the leak valve 15 introduces outside air into the negative pressure adjusting air passage 13.

An electric blower 18 including a dust collecting fan 16 and a motor 17 is stored in the electric blower storage room 7. An exhaust port 19 is formed in a side wall portion of the electric blower storage room 7. The exhaust port 19 communicates with an exhaust port 20 opened in a cover of the motor 17. Further, the housing of the motor 17 is provided with a plurality of exhaust holes 21 for exhausting the air sucked into the motor 17 from the dust collection fan 16, and the exhaust holes 21 pass through the exhaust ports 20 and 19 to the circulation air passage 8. I understand.

Although not shown, another exhaust port is formed in the cover of the motor 17, and this exhaust port communicates with the outside air through an opening (not shown) formed in the cleaner body 1. . Therefore, a part of the air exhausted from the electric blower room is discharged outside without being circulated.

The circulation air passage 8 extends to the connection port 11 through the side of the dust collection chamber 6. The connection port 11 has a small-diameter portion 22 to which the connection pipe portion 10 of the suction port body 4 is mounted, and a large-diameter portion 24 formed at the base of the connection pipe portion 10 and into which an exhaust circulation passage 23 is inserted. Have been. A communication hole 25 for communicating the exhaust circulation passage 23 and the circulation air passage 8 is formed in a wall connecting the large diameter portion 24 and the small diameter portion 22.

In addition, on one side wall of the connection port 11,
One end of a dust collection hose 26 is fixed. Hose 2
The other end of 6 is detachably attached to the cleaner body, and is sealed in the attached state. For example, when cleaning a desk or the like, the other end of the hose 26 is detached from the cleaner body 1 so that dust can be absorbed from the other end. The vicinity of one end of the hose 26 in the circulation air passage 8 is defined by a curved portion 27 and a large-diameter portion 24 at a lower portion of the housing 2. A hose attachment portion 28 for fixing the hose 26 of the connection port 11 is isolated from the circulation air passage 8. Connection port 1
A portion on the opposite side of the first hose mounting portion 28 is partitioned by a partition wall 29 communicating with the communication hole 25.

Therefore, the exhaust air from the circulation air passage 8 is exhausted from the connection port 1.
1, a gap 8A between the seal ring 30 and the hose 26, a space 8B between the outer peripheral portion of the hose 26 and the curved portion 27, a space 8C between the connection port 11 and the partition wall 29, and communication holes 25, 25.
Through the exhaust circulation passage 23. The gap 8A and the spaces 8B and 8C are continuous around the connection port 11.

A rib-like reinforcing portion 32 is formed on a partition wall 31 which divides the circulating air passage 8 and the dust collecting chamber 6 so as to be convex and concave to the inside of the dust collecting chamber 6. Have been. In this embodiment, the reinforcing portion 32 extends in a direction orthogonal to the longitudinal direction of the cleaner main body 1, but may extend along the longitudinal direction of the cleaner main body 1, or may extend in the longitudinal direction. It may extend in a grid pattern in the orthogonal direction. Further, the reinforcing portions extending in an oblique direction may intersect in a grid pattern.

In this embodiment, the reinforcing portion 32 has a concave portion on the side of the circulation air passage 8, but may have a flat surface on the side of the circulation air passage 8. Further, in this embodiment, the reinforcing portion 32 projects toward the inside of the dust collection chamber 6, but may project toward the circulation air passage 8. When the reinforcing portion 32 is protruded to the circulation air passage 8 side, if it is formed along the longitudinal direction of the circulation air passage 8, the resistance of the circulation exhaust is small. Further, the reinforcing portion 32 is formed in a rib shape having a semicircular or semielliptical cross section, but may be a wavy or wide thick portion. Further, the heights at which the reinforcing portions 32 protrude may be different from each other.
Further, a plastic heat insulating material in the form of a film or a sheet may be bonded in the circulation air passage 8.

The connection pipe 10 of the suction port 4 has a dust collecting chamber 6
Needless to say, an exhaust passage 33 communicating with the intake passage 33 is formed, and the exhaust circulation passage 23 is formed in parallel with the intake passage 33. It is configured to have a structure. The intake passage 33 is located inside the exhaust circulation passage 23 and is formed to be longer than the exhaust circulation passage 23. The base of the connection pipe portion 10 on the side of the suction port body 4 is rotatably held by the suction port body 4 and airtightness is maintained.
The exhaust circulation passage 23 communicates with a pair of cylindrical portions 34 formed on the left and right of the root of the connection pipe 10. Cylindrical part 3
Reference numeral 4 denotes a rotating portion between the connection pipe portion 10 and the suction port body 4, which is partitioned so as not to communicate with the intake passage 33. The circulating exhaust gas discharged from the cylindrical portion 34 is supplied to an exhaust passage 37 defined by an upper case 35 and a lower case 36 of the suction opening 4.
Is discharged. The partition wall 38 of the exhaust passage 37 covers the upper part of the rotating brush 39, and the partition wall 38 is formed with an exhaust outlet 40 communicating with the exhaust passage 34.

In the figure, A is a valve that releases the opening B when the suction port 4 is lifted off the floor, and the opening B is released when the suction port 4 is lifted off the floor. Is leaked so as not to blow out from the exhaust blowout hole 40. Therefore, when the suction opening 4 is lifted from the floor surface, the rotating brush 39 does not rotate.

In this electric vacuum cleaner, when the electric blower 18 is rotated, the air in the dust collecting chamber 6 is sucked and enters the electric blower 18, and a part of the exhaust air from the electric blower 18 is outside the cleaner main body 1. Most are discharged, but mostly enter the circulation air passage 8 through the exhaust holes 21 and the exhaust ports 20 and 19. The exhaust gas that has entered the circulation air passage 8 is separated from the gap 8A,
C, through the communication holes 25, 25, and enters the exhaust circulation passages 23, 23 of the connection pipe 10 of the suction opening 4. The exhaust gas having entered the exhaust circulation passages 23, 23 passes through the outside of the intake passage 33 of the connection pipe 10 and enters the exhaust passage 37 from the pair of left and right cylindrical portions 34. The exhaust brush 37 is rotated since the exhaust outlet hole 40 is open in the exhaust passage 37.

When the electric blower 18 suctions the dust collection chamber 6, a negative pressure is generated in the dust collection chamber 6 and a positive pressure is generated in the circulation air passage 8. In addition, the intake air passing through the dust collection fan 16 is heated because it draws heat from the motor when passing through the inside of the electric blower 18. The partition wall 31 is easily deformed due to the heating and the pressure difference between the negative pressure and the positive pressure. However, since the reinforcing portion 32 having a semi-elliptical cross section protrudes toward the dust collection chamber 6, the partition wall 31 is While being prevented from being deformed,
Utilization of the reinforcing portion 32 prevents the dust collecting bag 9 from sticking, thereby preventing a reduction in dust absorbing efficiency. Moreover, since the surface of the reinforcing portion 32 on the side of the circulation air passage 8 is concave, there is no exhaust resistance. Although a convex portion is formed in the intake air passage in the dust collection chamber 6, the intake air in the dust collection chamber 6 passes through the dust collection bag 9, and does not have a large air passage resistance.

In this embodiment, an upright type vacuum cleaner has been described as an example. However, the floor surface is moved by wheels, and the suction port 4 and the cleaner body are connected by an extension pipe or a hose. Needless to say, the present invention can be applied to a vacuum cleaner of the type described above or a so-called handy type vacuum cleaner.

[0023]

According to the vacuum cleaner of the first aspect of the present invention, the vacuum cleaner is caused by the negative pressure in the dust collection chamber and the positive pressure in the circulation air passage.
The deformation of the partition wall that separates the dust collection chamber and the circulation air passage, and the deformation of the partition wall caused by a rise in temperature can be prevented by the reinforcing portion.

According to the vacuum cleaner of claim 2 of the present invention,
In addition to the effect of the vacuum cleaner according to the first aspect, since the reinforcing portion is formed to be convex on the dust collection chamber side, there is no air resistance in the circulation air passage.

Further, it is possible to prevent the dust collection efficiency from being lowered by the dust collecting bag coming into close contact with the partition wall surface of the dust collecting chamber when the air is blown by the electric blower, by using the reinforcing portion of the partition wall.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the vicinity of a connection pipe portion of a suction port of the vacuum cleaner of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 4 Suction port body 6 Dust collection chamber 18 Electric blower 31 Partition wall part 32 Reinforcement part

Claims (2)

[Claims] 1. An electric machine in which a circulating air passage for circulating and supplying exhaust gas passing through an electric blower to a suction port connected to the cleaner body is formed in the cleaner body of the vacuum cleaner. In the vacuum cleaner, the circulation air passage is configured to pass through a side portion of the dust collection chamber, and a partition wall that separates the circulation air passage and the dust collection chamber includes:
An electric vacuum cleaner, wherein a reinforcing portion comprising a convex portion is formed. 2. The vacuum cleaner according to claim 1, wherein said reinforcing portion is formed in a rib shape protruding toward the inside of the dust collecting chamber.