JPH11187987A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate clogging of a dust collecting bag with lightweight/simple constitution by opening a blowoff port to blow off a part of exhaust air from a motor-driven air blower in the wall part to constitute a dust collecting chamber in a vacuum cleaner having the motor-driven air blower arranged in the rear of the dust collecting chamber to house the dust collecting bag. SOLUTION: Dust containing air is sucked in a dust collecting chamber 22 through a suction hose 61 by sucking dust and dirt from a suction chamber 34 of a suction port main body 31 together with air when the dust collecting chamber 22 is put under negative pressure after driving a motor-driven air blower 23. Air of the dust collecting chamber 22 exhausted at this time is exhausted to the suction port main body 31 through an exhaust connecting pipe 62 from an exhaust chamber 24, and a rotary cleaning body 35 is rotated by driving a turbine 37 in rotation. In this case, clogging is eliminated by separating dust accumulated by being butted at a right angle to a dust collecting filter 25 from a blowoff port 75 of the vertical wall part 73 of the dust collecting chamber 22 by deriving a part of exhaust air through a valve element 82 opening when a difference between positive pressure of exhaust air of the dust collecting chamber 22 and negative pressure of a branch exhaust air passage 80 becomes a prescribed value or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating vacuum cleaner for returning air exhausted by an electric blower to a suction port.

[0002]

2. Description of the Related Art Conventionally, a vacuum cleaner main body of an electric vacuum cleaner is provided with a dust collecting chamber for accommodating a dust collecting bag in a vacuum cleaner main body case and an electric blower for sucking air from the dust collecting chamber. I have. A dust collection opening corresponding to the intake of the dust bag is formed in the dust collection chamber, and a hose that communicates with the suction port body is connected to the dust collection opening. Exhaust air from the electric blower is disposed outside the cleaner main body through a lattice portion opened behind the case of the cleaner main body.

[0003]

However, in such a conventional vacuum cleaner, when fine dust such as powder is sucked from the suction opening body, the ventilation hole of the dust collection bag is closed and clogged. However, there is a problem that the dust collecting effect is reduced even if the exhaust output of the electric blower is increased.

In order to solve this problem, there is an apparatus which mechanically vibrates the dust collecting bag to eliminate the clogging of the dust collecting bag, but requires a vibration mechanism and a driving mechanism for applying mechanical vibration. In addition, there are problems that the number of parts increases, the weight increases, the main body of the cleaner increases, and the manufacturing cost increases.

The vacuum cleaner of the present invention has been made in view of such a problem, and an object of the present invention is to eliminate clogging of a dust collecting bag with a light and simple structure.

[0006]

According to a first aspect of the present invention, there is provided a vacuum cleaner in which an electric blower is disposed behind a dust collecting chamber for storing dust collecting bags. An outlet for opening a part of the exhaust air from the electric blower is opened on a wall constituting the dust collecting chamber.

According to a second aspect of the present invention, there is provided a vacuum cleaner in which an electric blower is disposed behind a dust collecting chamber for storing a dust collecting bag, and a suction opening body is formed by an intake air passage and an exhaust air passage. Connected, the suction port body communicates with the dust collection chamber via the intake air path, and recirculates exhaust air from the electric blower to the suction port body via the exhaust air path, In a vacuum cleaner that collects dust by an intake air while blowing an exhaust air in a body, a discharge port of the exhaust air is opened in a wall constituting the dust collection chamber, and a part of the exhaust air path is formed. It is characterized by communicating with the outlet.

According to a third aspect of the present invention, in the electric vacuum cleaner according to any one of the first and second aspects, the branch air path leading to the outlet of the exhaust air path to the dust collection chamber is provided. A valve is provided for branching off the exhaust air when the air pressure in the dust collection chamber becomes lower than a predetermined value.

According to a fourth aspect of the present invention, in the electric vacuum cleaner according to any one of the first to fourth aspects, the outlet is substantially perpendicular to a dust-collecting bag which is expanded by the intake air. It is characterized by being formed.

According to a fifth aspect of the present invention, in the vacuum cleaner of any one of the first to fifth aspects, the outlet is provided at a downstream portion of a suction opening of the dust bag, which is enlarged by the intake air. It is characterized by having been done.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a suction port of a vacuum cleaner according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 20 denotes an electric vacuum cleaner having a cleaner body 21 and a suction port body 30. Inside the cleaner body 21, a dust collecting chamber 22 and a negative pressure And an exhaust chamber 24 from which air is exhausted from the electric blower 23. A dust collection filter 25 as a dust bag is attached to the dust collection chamber 22.

The suction port body 30 is provided with a suction port main body 31, and a suction opening 3 is formed at the bottom of the front side of the suction port main body 31.
3 is formed, and a rotary cleaning body 35 is rotatably provided in the suction chamber 34. Suction chamber 3
A turbine chamber 36 is defined by a partition wall 46 on the right side behind the turbine 4.
Are provided rotatably. Rotary shaft 3 of turbine 37
An endless belt 40 is wound around the rotating shaft 39 of the rotary cleaning body 8 and the rotary cleaning body 35, and the rotary cleaning body 35 is rotated by the rotation of the turbine 37. A connection pipe 41 is connected to the rear of the suction chamber 34 so as to be rotatable about a shaft 41A in the front and back directions on the paper of FIG.

The connection pipe 41 is composed of a suction connection pipe 42 and an exhaust connection pipe 43, and the suction connection pipe 42 and the suction chamber 34 communicate with each other via a suction passage 44 formed in the suction port main body 35. . In this embodiment, the intake air path A is composed of a suction path 44, a suction chamber 34, and a suction hose 61, and the suction connection pipe 42 is connected to the dust collection chamber 2 via the suction hose 61.
It communicates with 2.

The exhaust connection pipe 43 and the turbine chamber 36 communicate with each other via an exhaust passage 45 formed in the suction port main body 35. A hole 48 is provided in the partition wall 46 of the turbine chamber 36 and the partition wall 47 that partitions the suction chamber 34, and the turbine chamber 36 and the suction chamber 34 communicate with each other through the hole 48. A hole 50 is formed in the bottom wall of the exhaust air passage 45. An exhaust chamber 51 is defined at the rear bottom of the suction chamber 34, and the exhaust chamber 51 and the exhaust air passage 45 communicate with each other through a hole 50.

In this embodiment, the exhaust air path B includes an exhaust chamber 24, an exhaust hose 62, an exhaust connection pipe 43, an exhaust path 45,
It is constituted by an exhaust chamber 51, a turbine chamber 36, and a hole 48 for exhaust.

Reference numeral 55 denotes a pair of rollers provided on the front side of the suction port main body 31, and reference numeral 56 denotes a pair of rear wheels provided on the rear part of the suction port main body 31.

The suction hose 61 is connected to the connection cylinder 70 of the dust collection chamber 22.
The dust collecting opening plate 71 of the dust collecting filter 25 is detachably attached to the connection tube 70. Dust collection room 2
The portion of the second vacuum cleaner 23 side communicates via a filter 72.

The dust collecting chamber 22 includes a vertical wall portion 73 for partitioning a portion of the dust collecting filter 22 opposite to the dust collecting opening plate 71, a vertical wall portion 76 for closing the dust collecting opening plate 71, and an upper wall. The section 77 is partitioned except for the electric blower 23 side.

A plurality of ribs 74 for supporting the swollen dust filter 25 are projected from the vertical wall portion 73, and a plurality of exhaust air outlets 75 are opened between the ribs 74. ing. The outlet 75 is opened on the downstream side of the airflow from the connection cylinder 70 and is provided at a location where dust flowing from the connection cylinder 70 is likely to adhere and accumulate. The vertical wall portion 73 is supported by the rib 74 when the dust collection filter 25 expands, so that the vertical wall portion 73 and the dust collection filter 2 are supported.
5 is prevented from coming into close contact with the air outlet 75.
Dust collection filter 2 with blown exhaust air spread
It is designed to hit 5 at right angles.

Thus, the amplitude at which the dust filter 25 is vibrated can be maximized. For example, even if fine dust such as powder scattered on the floor accumulates, the downstream portion 25A of the dust filter 25 can be used. Is vibrated to increase the efficiency of peeling off the lump of dust.

A recirculation pipe 81 for forming a branch exhaust air passage 80 is formed outside the vertical wall portion 73. The reflux pipe 81 is
Together with the vertical wall portion 73 of the dust collecting chamber 22, a closed-section tube is formed, and communicates with the exhaust hose 62 to the exhaust chamber 24 forming an exhaust air passage.

A valve element 82 is provided at the branch between the branch exhaust air passage 80 and the exhaust chamber 24 so as to rotate toward the branch exhaust air passage 80. The valve element 82 is provided at the corner forming wall 8 of the exhaust chamber 24.
3 functions as a lid for closing the opening 84 from the branch exhaust air passage 80 side. The valve body 82 is urged in a direction to close the opening 84 by, for example, a spiral spring. This urging force is caused by the suction negative pressure of the dust collection chamber 22 and the exhaust chamber 2.
The branch exhaust air passage 80 is set so as to communicate with the exhaust chamber 24 when the difference from the positive pressure of the exhaust gas of No. 4 becomes higher than a predetermined value. Note that the valve body 84 may be configured by a plate body such as a reed valve.

Next, the operation of the vacuum cleaner according to the above embodiment will be described.

When the electric blower 23 is driven and the dust collection chamber 22 becomes negative pressure, dust is sucked together with air from the suction chamber 34 of the suction port body 31, and the dust and air are sucked by the suction air passage 44 and the suction connection pipe 42. Then, the air is sucked into the dust collection chamber 22 of the main body 21 via the suction hose 61.

On the other hand, the air in the dust collection chamber 22 that is exhausted by the drive of the electric blower 23 is exhausted to the exhaust chamber 24, and the air that is exhausted to the exhaust chamber 24 is further discharged to the suction port main body 31 through the exhaust connection pipe 62. The air is exhausted to the exhaust connection pipe 43.

The air exhausted to the exhaust connection pipe 43 is exhausted to the turbine chamber 36 via the exhaust air passage 45, and the air exhausted to the turbine chamber 36 is further exhausted by the holes 4 of the partition walls 46 and 47.
The air is sucked into the suction chamber 34 through 8. Then, the turbine 37 is rotated by the air exhausted into the turbine chamber 36, and the rotation of the turbine 37 causes the rotary cleaning body 35 to rotate.
Rotates and scoops up dust on the floor.

The air exhausted to the exhaust air passage 45 is exhausted to the exhaust chamber 51 through the hole 45, and the air exhausted to the exhaust chamber 51 blows out toward the floor. Dust on the floor surface is blown up by the blown air, and is sucked into the suction chamber 34. Then, the dust and air are sucked into the dust collection chamber 22 in the same manner as described above, and the air is exhausted from the dust collection chamber 22 to the exhaust chamber 24 and circulates.

Dust accumulates in the dust collecting filter 25 via the suction hose 61 and the connecting tube 70. If the dust is dust, the dust accumulates on the downstream portion 25A of the connecting tube 70 of the dust collecting filter 25. It's easy to do. When dust accumulation occurs at the downstream portion 25A of the dust collecting filter 25, the dust collecting chamber 2
In the inside 2, the negative pressure rises due to the suction force of the electric blower 23.

The negative pressure of the dust collection chamber 22 is controlled by the branch exhaust air passage 8.
Acts on the valve element 82 via the zero. On the other hand, the electric blower 23
The rotation speed increases due to the thinning of the air.
When the difference between the positive pressure of the exhaust gas and the negative pressure of the branch exhaust air passage 80 becomes equal to or larger than a predetermined value, the valve element 82 opens to introduce a part of the exhaust gas into the branch exhaust air passage 80. The exhaust gas introduced into the branch exhaust air passage 80 impinges on the downstream portion 25 </ b> A of the dust collecting filter 25 at a substantially right angle from the outlet 75 of the vertical wall portion 73 of the dust collecting chamber 22.

Further, in the dust collecting filter 25 in which the clogging has occurred, since the suction force of the air is reduced, the accumulated dust is easily separated from the dust collecting filter 25. Therefore, when the downstream portion 25A of the dust collecting filter 25 vibrates due to the exhaust from the outlet 75, the lump of the accumulated dust is more likely to fall off. In addition, as shown in FIG. 2, an intake hole 90 and an exhaust hole 91 are formed in the cleaner main body 20 so that the electric blower 23 is cooled.

[0032]

According to the first aspect of the present invention, the exhaust gas discarded from the electric blower is blown out from the outlet of the wall constituting the dust collecting chamber and is applied to the dust collecting bag, thereby forming the dust collecting bag. Since the air is fed into the dust collecting bag while being pushed into the bag, the clogged dust accumulation portion can be broken and eliminated, and the dust collecting bag can be prevented from being clogged. In addition, since only the branch air passage for circulating the exhaust air from the electric blower to the dust collection bag is formed, it is possible to minimize the complexity of the internal structure of the cleaner body, increase the number of parts and increase the weight, and manufacture the cleaner. The increase in cost can be eliminated.

According to the second aspect of the present invention, in the circulating vacuum cleaner, an exhaust air outlet is formed in the component wall of the dust collecting chamber, and a part of the exhaust air from the electric blower is formed from the exhaust air outlet. Is recirculated and blown out, so that clogging of the dust collecting bag can be eliminated and only the branch air path is formed, as in the case of the vacuum cleaner of the first aspect. An increase in the number of parts and an increase in weight can be avoided as much as possible, and an increase in manufacturing cost can be eliminated.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects, when the pressure of the dust collection chamber becomes lower than a predetermined value in the branch air passage, the valve is opened to exhaust the exhaust air. So send it out
Normally, the supply amount of the exhaust air is ensured.

According to the fourth aspect of the present invention, since the exhaust air is blown at substantially right angles to the dust collecting bag, the vibration amplitude and the dent amount of the dust collecting bag are maximized, and the volume of dust or the like accumulated in the bag is increased. Efficiency is increased.

According to the fifth aspect of the present invention, the downstream position of the dust collecting opening of the dust collecting bag is a portion where dust easily accumulates.
By blowing exhaust gas to this portion, clogging elimination efficiency is high.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a vacuum cleaner according to the present invention.

FIG. 2 is a perspective view of the electric vacuum cleaner shown in FIG.

[Explanation of symbols]

 Reference Signs List 20 vacuum cleaner 22 dust collecting chamber 23 electric blower 24 exhaust chamber 25 dust collecting filter 44 suction air path 45 exhaust air path 61 suction hose 62 exhaust hose 73 vertical wall portion of dust collecting chamber 74 rib 75 exhaust air outlet 80 branch Exhaust air path 82 Valve body A Intake air path B Exhaust air path

Claims (5)

[Claims] 1. An electric vacuum cleaner having an electric blower disposed behind a dust collecting chamber for storing a dust collecting bag, wherein a part of exhaust air from the electric blower is blown to a wall constituting the dust collecting chamber. An electric vacuum cleaner characterized by having an open outlet. 2. A cleaner body having an electric blower disposed behind a dust collection chamber for storing a dust bag, and a suction port body are connected by an intake air path and an exhaust air path. In addition to communicating with the dust collecting chamber through an intake air passage, exhaust air from the electric blower is circulated to the suction port body through the exhaust air path, and the exhaust air is blown out in the suction port body. In the vacuum cleaner for collecting dust according to (1), an outlet of the exhaust air is opened in a wall part constituting the dust collecting chamber, and a part of the exhaust air path is communicated with the outlet. And vacuum cleaner. 3. The vacuum cleaner according to claim 1, wherein a pressure in the dust collection chamber is lower than a predetermined value in a branch air passage leading to an outlet of the exhaust air passage to the dust collection chamber. A vacuum cleaner provided with a valve for branching the exhaust air when it becomes exhausted. 4. The electric vacuum cleaner according to claim 1, wherein the outlet is formed so as to be substantially perpendicular to a dust bag that expands due to the intake air. Vacuum cleaner. 5. The electric vacuum cleaner according to claim 1, wherein the outlet is provided at a downstream portion of a suction opening of a dust bag that expands by an intake air. Machine.