JPH0824178A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To ensure a volume of cooling air for a vacuum cleaner without lowering the suction efficiency of a nozzle. CONSTITUTION:A vacuum cleaner comprises a dust collecting part 3 having a top surface formed therein with an opening, a body part 2 incorporating a motor blower 1 and removably attached to the dust collecting part 3, a clip 4 fixing the body part 2 to the dust collecting part 3, a nozzle port 23 formed at a position where it is covered with the clip 4, a communication passage 28 for communicating the nozzle port 23 with the dust collecting part 3, and a valve 29 connected in the communicating passage 28. With this arrangement, the body part 2 is fixed to the dust collecting part 3 by means of the clip 4, and accordingly, the valve 29 is also secured.

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 electric vacuum cleaner capable of ensuring a cooling air volume of a blower without lowering suction efficiency from a suction port.

[0002]

2. Description of the Related Art Conventionally, as disclosed, for example, in Japanese Utility Model Publication No. 55-28197, a main body part in which a blower is built and a dust collecting part are vertically stacked, and a clip supported by the dust collecting part is engaged. By engaging the engaging claw with the engaging part provided in the main body, the dust collecting part and the main body are connected, and the intake port is provided in the area below the engaging part that is laterally covered by the clip. There has been proposed an electric vacuum cleaner that is provided with a communication passage (outside air introduction groove) that opens and communicates the intake port with a dust collection chamber in the dust collection unit.

In this conventional example, when the dust bag in the dust collecting portion or the filter is clogged, the air necessary for cooling the blower is introduced into the main body portion through the communicating passage (outside air introducing groove). Also, it is possible to prevent the seizure of the blower caused by the clogging of the dust collection bag or the filter.

[0004]

However, in this conventional example, since the inside of the dust collecting chamber or the main body portion is always communicated with the atmosphere through the communication passage (outside air introduction groove), the suction port to the dust collecting portion. I hate to reduce the inhalation efficiency of.

Therefore, the main body part and the dust collecting part are vertically stacked,
By engaging the engaging claws of the clip supported on the dust collecting portion with the engaging portion provided on the main body portion, the dust collecting portion and the main body portion are connected, and by the clip below the engaging portion. Open the inlet in the area covered from the side. A communication passage that connects this intake port to the dust collection chamber in the dust collection portion was provided, and a valve that was closed when the internal pressure of the dust collection portion was above a predetermined value and opened when it fell below the predetermined value was provided in the communication passage. An electric vacuum cleaner has been proposed.

With such a structure, it is possible to prevent a decrease in the suction efficiency from the suction port to the dust collecting portion without constantly communicating the dust collecting chamber or the main body portion with the atmosphere through the communication passage.

By the way, in the above-mentioned structure, it is necessary to surely press and fix the valve seat on the upper part of the valve, and if this pressing force is small, the valve seat vibrates, and the vibration noise becomes leakage noise to the outside. There's a problem. Further, in order to reliably press the valve seat, it is necessary to securely fix the member pressing the valve seat with a screw or the like, which causes a problem that the number of parts increases.

The present invention has been made in view of the above circumstances, and an electric vacuum cleaner capable of ensuring the cooling air volume of a blower without increasing the number of parts and reducing the suction efficiency from the suction port. It is intended to provide.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a dust collecting portion having an opening on the upper surface thereof, a main body portion having a built-in electric blower, which is detachably mounted on the dust collecting portion, and an engaging claw are provided on the main body. A clip for fixing the dust collecting portion and the main body portion by engaging with an engaging portion provided in the portion, an intake port formed at a position covered by the clip, and the intake port and the inside of the dust collecting portion. It is characterized in that a communication passage communicating with the communication passage and a valve arranged in the communication passage are provided, and the valve is fixed by fixing the main body portion to the dust collecting portion with the clip.

[0010]

[Function] When the internal pressure of the dust collecting portion is equal to or higher than the predetermined value, the valve is closed and the outside air does not flow into the dust collecting portion through the suction port and the communication passage. Is no longer a concern.

Since the valve can be fixed by the pressing rib pressed by the clip, the valve seat can be surely pressed and fixed without increasing the number of parts.

Further, for example, when the internal pressure of the dust collecting portion falls below a predetermined value due to clogging of a duct hose connecting the suction port to the dust collecting portion, clogging of the dust collecting bag or filter, etc., the valve is opened and the communicating passage is opened. Since the outside air is opened, the outside air is introduced into the dust collecting portion from the intake port through the communication passage and is further sucked into the main body portion, so that the air volume necessary for cooling the blower can be secured.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The vacuum cleaner according to one embodiment of the present invention will be described in detail with reference to the drawings.

As shown in the vertical side views of FIGS. 1 and 2, in an electric vacuum cleaner according to an embodiment of the present invention, a main body part 2 having a blower 1 built therein and a trash type dust collecting part 3 are provided. By engaging the engaging claws 5 of a pair of clips (buckles) 4 which are vertically stacked and supported on the outer peripheral surface of the dust collecting part 3 with the engaging parts 6 provided in the main body 2, The dust collecting portion 3 is detachably fixed.

A hose plug 7 for inserting and locking a base end portion of a suction hose connected to a suction port is provided at a lower portion of the front surface of the dust collecting portion 3 and is provided in a dust collecting chamber 8 in the dust collecting portion 3. A dust collection bag 9 made of, for example, paper, cloth, or the like having air permeability is attached so as to surround the hose plug 7.

A free wheel 1 is provided below the dust collecting portion 3.
0 is provided so that the dust collecting portion 3 and the main body portion 2 fixed to the upper side thereof can freely move on the floor following the suction hose.

The main body 2 covers the lower case 11 that hermetically closes the upper opening of the dust collector 3, the paragraph 12 provided at the center of the lower case 11, and the paragraph 12 covered from above. The fan-shaped blower case 13 and the upper case 14 that covers the lower case 11 and the blower case 13 from the upper side are provided.

A ventilation port 15 is formed in the bottom surface of the paragraph 12 so that the dust collection chamber 8 communicates with a blower chamber 16 formed between the paragraph 12 and the blower case 13. I have to. Further, another ventilation port 17 is provided in the lower part of the peripheral wall of the blower case 13 so that the ventilation chamber 17 is communicated with a muffling chamber 18 formed between the blower case 13 and the upper case. I have to. Further, an exhaust port 19 is formed between the upper case 14 and the lower case 11 to connect the muffling chamber 18 to the outside.

An outer collar 2 is provided at the lower end of the blower case 13.
No. 0 is formed, and a rib 21 continuous in an annular shape from the outer peripheral edge of the outer collar 20 is raised to a position higher than the ventilation port 17 and the exhaust port 19, and the sound deadening material 2 filled in the sound deadening chamber 18 is formed.
2 is the rib 21, the blower case 13, and the upper case 1
Positioning is done with 4. The blower case 13 and the lower case 12 are fixed with screws 36.

When the blower 1 is operated, the air in the dust collection chamber 8 is sucked into the blower chamber 16 through the ventilation port 15 and further sucked into the blower 1. Then, the airflow blown out by the blower 1 flows into the muffling chamber 18 from the ventilation port 17, and while passing through the muffling material 22 while bypassing the rib 21, the noise energy is absorbed or attenuated and reaches the exhaust port 19, It is released from the mouth to the outside.

The engaging portions 6 are formed at two positions on the outer periphery of the upper case 14 which face each other, and as shown in FIGS. 1 to 3, between the one engaging portion 6 and the lower case 11, An intake port 23 is formed in a region covered by the engaging claw 5 of the clip 4 from the rear side, and the intake port 23 is exposed to the atmosphere by a gap 24 formed between the engaging claw 5 of the clip 4 and the upper case 14. It is communicated inside.

As shown in FIGS. 1 and 2, the upper case 14
An air intake chamber 26 defined by a partition wall 25 provided inside the silencer chamber 18 and the outer flange 20 of the blower case 13 so as to be connected to each other.
The lower case 11 is formed with a communication hole 27 for communicating the suction chamber 26 with the dust collection chamber 8.
A communication passage 28 that connects the intake port 23 to the dust collection chamber 8 is formed by the communication hole 27. The partition wall 25 in the intake chamber 26 is provided with a pressing rib 35 for suppressing the valve seat 34. One end portion of the partition wall 25 is located below the upper case 14 of the engaging portion 6, and when the upper case 14 and the lower case 11 are engaged and fixed by the engaging claws 5 of the clip 4, the pressing rib 35 causes the valve to move. The seat 34 is configured to be pressed with a predetermined pressing force.

A valve box 3 of a check valve 29 is provided in the communication hole 27.
0 is fitted inside, and a valve element 31 is inserted in the valve box 30 so as to be able to move up and down, and a spring 32 that biases the valve element 31 upward is inserted. A valve hole 33 is provided on the top of the valve box 30.
A valve seat 34 having a
As described above, the valve seat 34 is pressed against the upper surface of the lower case 11 by the pressing rib 35 provided on the inner partition wall 25.

When the internal pressure of the dust collecting chamber 8 is above a predetermined value, the valve element 31 is pressed against the valve seat 34 by the spring 32 and the valve hole 33 is closed by the valve element 31, as shown in FIG. The check valve 29 is closed, the atmosphere does not flow from the intake port 23 through the communication passage 28 into the dust collection chamber 8, and the suction efficiency from the suction port to the dust collection chamber does not decrease.

When the internal pressure of the dust collecting chamber 8 falls below a predetermined value due to, for example, clogging of the suction duct, clogging of the dust collecting bag or the filter arranged on the windward side of the blower 1 as necessary, as shown in FIG. Further, the valve 31 is driven downward against the spring 32 due to the pressure difference between the internal pressure of the dust collection chamber 8 and the atmospheric pressure, the valve hole 33 is opened, and the dust collection chamber 8 is closed by the check valve 29.
Is communicated with the atmosphere through the communication passage 28 and the intake port 23,
Since the air flows into the dust collecting chamber 8, the blower 1
Can inhale enough air to cool it,
As a result, the seizure of the motor of the blower 1 is prevented.

Of course, since the communication passage 28 is partitioned by the muffling chamber 18 and the partition wall 25, there is no possibility that the high temperature airflow in the muffling chamber 18 will flow into the communication passage 28, and the blower 1 of the blower 1 is caused by the inflow of the high temperature airflow. The risk of motor burnout is eliminated.

Moreover, this electric vacuum cleaner is closed when the internal pressure of the dust collecting portion 3 is equal to or more than a predetermined value in the communication passage 28 of the conventional example.
Only the check valve 29 that is opened when the value falls below a predetermined value is provided, and the valve seat 34 of the check valve 29 is provided in the blower case 13
Since it is fixed by the pressing rib 35 of the partition wall 25 that is connected to, the increase in the number of parts is small, and it can be easily implemented at low cost.

[0028]

As described above, according to the present invention, the communication passage is provided with the valve which is closed when the internal pressure of the dust collecting portion is equal to or higher than the predetermined value and is opened when the internal pressure of the dust collecting portion is lower than the predetermined value. When the internal pressure of the dust part is more than a predetermined value, it is possible to prevent the atmosphere from flowing into the dust collection part through the communication passage, prevent the suction efficiency from the suction port from decreasing, and the internal pressure of the dust collection part to be the predetermined value. When the temperature is below the range, the atmosphere flows into the dust collecting portion through the communication passage to compensate for the shortage of the cooling air volume, and the cooling air volume of the blower can be secured.

Further, since it is only necessary to add a valve to the conventional structure, the structure is simple, easy, and inexpensive. Further, since the valve can be fixed by the pressing rib pressed by the clip, the valve seat portion can be reliably pressed and fixed without increasing the number of parts.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view when an internal pressure of a dust collecting portion according to an embodiment of the present invention is a predetermined value or more.

FIG. 2 is a vertical sectional side view when the internal pressure of the dust collecting portion of the embodiment of the present invention is lower than a predetermined value.

FIG. 3 is a rear view of the embodiment of the present invention.

[Explanation of symbols]

 2 Main body 3 Dust collecting part 4 Clip 5 Locking claw 6 Engaging part 8 Dust collecting chamber 23 Intake port 25 Partition wall 28 Communication passage 29 Check valve 34 Valve seat 35 Pressing rib

Claims (1)

[Claims] 1. A dust collecting portion having an opening on the top surface, a main body portion having a built-in electric blower and detachably attached to the dust collecting portion, and a clip fixing the dust collecting portion and the main body portion. An intake port formed at a position covered by the clip, a communication passage communicating the intake port and the inside of the dust collecting portion, and a valve arranged in the communication passage are provided, and the main body portion is formed by the clip. The vacuum cleaner is characterized in that the valve is fixed by fixing the valve to the dust collecting portion.