JPS58146323A - Electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a vacuum cleaner which is provided with a dust collecting section in the front part and has an electric blower, a cord reel, etc. installed in the rear thereof, and is particularly aimed at reducing noise caused by the exhaust air of the electric blower. This relates to a sound deadening structure.

Generally, this type of vacuum cleaner has a structure in which the exhaust air from the electric blower is discharged outside from the exhaust port on the rear end of the vacuum cleaner body, so there is a gap between the electric blower located at the rear and the exhaust port. The length of the connecting exhaust passage is short, and there is a limit to the reduction in exhaust air noise due to the shape of the exhaust passage or the sound-deadening material installed in the passage, especially as vacuum cleaner bodies become smaller as in recent years. The smaller the space required for noise reduction, the more difficult it is to achieve low noise.

The present invention has been made in view of this point, and by forming an exhaust passage along the inner surface of the bottom wall of the vacuum cleaner body, a large space for noise reduction can be taken, and it is possible to easily reduce noise. This is how it was done. Embodiments of the present invention shown in the drawings will be described in detail below.

The vacuum cleaner main body 1 is composed of an upper case 2 and a lower case 3, and is equipped with running wheels 4 on both sides of the rear part, and has a recess 5 formed on the lower surface of the bottom wall 1a, and a flexible wheel 6 arranged in the recess 5. It is set up. A storage chamber 7 whose upper surface is an opening is formed in the front part of the vacuum cleaner main body 1, and a bottom wall 7a and a front wall 7b of this storage chamber 7 meet the inner surfaces of the bottom wall 1a and the front wall 1b of the vacuum cleaner main body I. An exhaust passage 8 is formed with a suitable gap therebetween. This exhaust passage 8 is formed along the inner surface of the bottom wall 1a of the vacuum cleaner main body 1, and is located over almost the entire width except for the recess 5.
Its terminal end communicates with an exhaust port 9 formed by drilling a number of holes in the front wall 11 of the cleaner body 1. The cylindrical body 10 is disposed with one end opened outside the front wall 1b and the other end opened inside the front wall 71), with the outer open end serving as an intake port 11.
is communicated with the storage chamber 7.

A dust collection case 12, which is a dust collection part, is housed in the storage chamber 7 so as to be able to enter and exit the storage chamber 7 through its upper opening. The lid 13 is pivoted so that it can be opened and closed, and a main filter 15 is airtightly fitted to the rear end opening with a backing 16 on the outer periphery, and a pre-filter is installed between the dust suction port 14 and the main filter 15. 17 are placed. When the dust collection case 12 is in the stored state, the dust inlet I4 is connected to the inlet 11, and from the inlet 11, the dust inlet 14, the pre-filter 17, and the main filter 15 are connected to the vent I8 in the rear wall 7c of the storage chamber 7. form an air passageway leading to the The upper opening of the storage chamber 7 is opened and closed by an upper lid 19 pivotally mounted on the cleaner body I.

Further, the vacuum cleaner main body 1 is partitioned into a cord reel chamber 20 and a ventilation chamber 21 on the left and right at a rear position of the storage chamber 7, and a cord reel 22 is installed inside the cord reel chamber 20. On the other hand, the electric blower 23 is installed in the ventilation chamber 21 with anti-vibration rubber 24.
4 to support the interior and connect the suction side of the fan to the vent 18.
It is located opposite. A sound deadening material 25 such as urethane foam is wrapped around the outer circumference of the motor part of the electric blower 23.
5 is attached by a porous sound deadening plate 26 made of a material such as rubber. The ventilation chamber 21 communicates with the starting end of the exhaust passage 8 at its bottom.

In the figure, 27 is a rib that supports the motor side of the electric blower 23, 28 is a sound deadening material such as urethane foam pasted on the lip 27, 29 is a sound deadening material such as urethane foam pasted on the exhaust port 9, and 30 is a shock absorbing material. The absorption bumper is shown.

In the embodiment with the above configuration, when the electric blower 23 is driven now, the air containing dust is transferred to the suction port (not shown), the dust suction hose, and the suction port 11. The dust enters the dust collection case 12 through the dust suction port 14, and inside this, coarse dust is collected and removed by the pre-filter 17 and fine dust is collected and removed by the main filter 15. After being purified, the air enters the electric blower 23 through the ventilation port 18. I can't breathe. Then, the air discharged from the electric blower 23, that is, the exhaust air, passes through the sound deadening material 25 and the porous sound deadening plate 26, collides with the sound deadening material 28, and due to this collision, the flow is changed to a downward direction and enters the exhaust passage 8. The air flows forward in the exhaust passage 8, passes through the sound deadening material 29, and is discharged from the exhaust port 9 to the outside of the machine. Since the exhaust passage 8 is formed along the inner surface of the bottom wall 1a of the cleaner body 1 and spans almost the entire width, it greatly contributes to the rectification of the exhaust air and can sufficiently reduce the wind speed. As a result, wind noise is significantly attenuated. Moreover, since the storage chamber 7, dust collection case 12, etc. are located above the exhaust passage 8, these act as a soundproof wall against upward diffusion of wind noise, and the overall noise can be sufficiently reduced.

In the above-mentioned embodiment, the exhaust air is discharged to the front of the vacuum cleaner body, but the exhaust passage 8 is partitioned left and right to reach the rear end of the vacuum cleaner body via the front end and back again. A series of exhaust passages may be formed to exhaust the gas to the rear.

According to the present invention configured as described above, by forming the exhaust passage along the inner surface of the bottom wall of the vacuum cleaner body, a large space for noise reduction can be taken up even when the vacuum cleaner body is downsized. Moreover, a large rectifying effect can be expected, and in addition, the dust collection section acts as a soundproof wall against the upward diffusion of wind noise, making it possible to significantly reduce noise.

[Brief Description of the Drawings] Fig. 1 is a schematic cross-sectional configuration diagram of the vacuum cleaner of the present invention, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Fig. 3 is a sectional view taken along line BB in Fig. 1.
Figure 4 is a cutaway bottom view of part 1 of the same as above. O I: Vacuum cleaner body, 1a: Bottom wall, 8: Exhaust passage, 9: Exhaust port, 12: Dust collection case (dust collection part), 22: Cord reel, 23: Electric blower. Agent Patent Attorney Aihiko Fukushi (2 others) ＼ 129-

Claims (1)

[Claims] 1. A vacuum cleaner main body having an air intake port at the front end, a dust collection section connected to the air intake port provided at the front part of the vacuum cleaner main body, and an electric blower installed behind the dust collection section. and a vacuum cleaner with a cord reel or the like inside, characterized in that an exhaust passage is formed along the inner surface of the bottom wall of the vacuum cleaner body, and the exhaust air from the electric blower is discharged outside the machine through the exhaust passage. vacuum cleaner. 2. The vacuum cleaner according to claim 1, wherein the exhaust passage is formed over substantially the entire width of the vacuum cleaner body.