JPS58175528A - 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, and more particularly to a noise reduction structure for reducing noise caused by exhaust air from an electric blower.

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 more space is required for noise reduction, the more difficult it is to achieve noise reduction.The present invention has been made in view of this problem, and the present invention has been made by rectifying the air on the outer circumferential surface of the vacuum cleaner body. By discharging the exhaust air from the electric blower through the rectifying tube, the noise caused by the exhaust air is reduced, and even if the vacuum cleaner itself is downsized, it is possible to provide a low-noise vacuum cleaner. Embodiments of the present invention shown in the drawings will be described in detail below.

In FIGS. 1 to 6, the vacuum cleaner main body l is the upper case 2.
and a lower case 8, with running wheels 4 on both rear sides.
It is equipped with flexible wheels 5 on the curved part and the bottom surface.

At the front of this vacuum cleaner body l is a storage chamber 6 with an opening on the top surface.
A suction tube body 7 for connecting a dust suction hose (not shown) is disposed on the front wall of the storage chamber 6.

A dust collection case 8, which is a dust collection part, is housed in the storage chamber 6 so as to be able to enter and exit the storage chamber 6 through its upper opening. The lid 9 is arranged to be openable and closable, and a main filter 11 is airtightly fitted to the rear end opening with a backing 12 on the outer periphery, and a pre-filter is installed between the dust suction port 10 and the main filter 11. 18'l is arranged. Thus, the dust collection case 8 is connected from the suction tube body 7 to the dust suction port 10 in the stored state. Prefilter 18. An air passage is formed that passes through the main filter 11 and reaches a vent 14 on the rear wall of the storage chamber 6. The top opening of the storage chamber 6 is opened and closed by a top lid 15 that is pivotally mounted on the vacuum cleaner body 1.The vacuum cleaner body 1 also has a cord reel chamber 16 and a blower chamber 17 on the left and right sides at the rear of the storage chamber 6. The cord reel chamber 16 is equipped with a cord reel 18tl. On the other hand, in the ventilation chamber 17, an electric blower +9 is installed with vibration-proof rubber 20.
．． 21 i to support the interior, with the suction side of the fan facing the vent 14, and the exhaust side facing the vacuum cleaner main body I.
It is located opposite to the air exhaust port 22 on the rear end surface. A sound deadening material 23 such as urethane foam is wrapped around the outer periphery of the motor portion of the electric blower 19, and the sound deadening material 28 is supported by a porous sound deadening plate 24 made of a material such as rubber.

The rectifier tube 25 has a U-shape when viewed from above, and is arranged from the rear end of the cleaner body 1 to near the front ends of both sides.The rectifier tube 25 has a central portion that matches the exhaust port 22, and is arranged to extend from the rear end of the cleaner body 1 to near the front ends of both sides. An intake port 26 communicating with the exhaust side of the electric blower 19 is formed therein, and exhaust ports 27, 27'i are formed on the lower surfaces of both front ends. The rectifier tube 25 is housed in a groove 28 of the vacuum cleaner main body l, with its outer peripheral portion protruding slightly outward, and a treadable cover 25a made of vinyl chloride resin or the like is provided on the surface of this protruding portion.
The cover 25a is also used as a shock absorbing bumper. The groove 28 is located between the upper and lower cases 2.3 and is formed from the rear end surface of the vacuum cleaner body 1 to near the front ends of both sides. A distributed exhaust port 29 is formed in which the rectifying lips 80 and 80 are arranged in parallel, and the distributed exhaust port 29 is connected to the rectifying cylinder 25.
It matches the exhaust port 27 of.

In the figure, 81 is a sound absorbing material pasted on the inner surface of the straightening tube 25 facing the intake port 26, and 82 is the exhaust port 27, 27 of the straightening tube 25.
This shows the soundproofing material installed in the area.

In the embodiment with the above configuration, when the electric blower 19 is driven, the air containing dust enters the dust collection case 8 through the suction port (not shown), the dust suction hose, the suction tube, and the dust suction port 10. Inside this, coarse dust is collected and removed by the pre-filter 18 and fine dust by the main filter 11, and after being purified, they are sucked into the electric blower 19 from the vent 14, and the dust is collected and removed by the dust collection case 8. Then, the air discharged from the electric blower 19, that is, the exhaust air, passes through the sound deadening material 28 and the porous sound deadening plate 24, and enters the rectifying cylinder 25 from the wind exhaust port 22 through the intake port 26. Due to the collision with the sound absorbing material 8'1, it is divided into left and right sides and flows into the rectifying tube 25, and from the sound insulating material 32 and the exhaust ports 27, 27 to the distributed exhaust port 2.
9.29 and is discharged outside the machine.Since the rectifier tube 25 has a sufficient length dimensionally, it exerts a sufficient rectifying effect on the flow of exhaust air. In combination with the effects of the sound absorbing material 31 and the sound insulating material 820 and the weakening of the wind speed due to the split flow to the left and right, wind noise can be greatly attenuated.
The rectifying action of the rectifying cylinder 25 also works, making it possible to significantly reduce the overall noise. FIG. 7 is a noise comparison measurement diagram with and without a soft cover. shows. Of course, the soft cover 25a also serves to prevent furniture from being damaged when the cleaner body 1 collides with the furniture.

Note that the rectifying tube 25 may be disposed on the outer circumferential surface of the cleaner main body l, and is not limited to being disposed across both side surfaces from the rear end surface. In addition, the rectifying cylinder 25 is connected to the vacuum cleaner main body 1.
Although the outer circumferential portion is housed in the concave groove 28 so that it slightly protrudes outward, it does not have to protrude outward, and on the contrary, the entire portion may be provided in a protruding state.

As described above, according to the vacuum cleaner of the present invention, the rectifying cylinder is arranged on the outer peripheral surface of the vacuum cleaner body, and the exhaust air from the electric blower is discharged through the rectifying cylinder, so that the length of the rectifying cylinder can be reduced. It is possible to make the rectifier cylinder long enough to exert a high rectifying effect on the flow of exhaust air and attenuate wind noise without being bound by the internal structure of the vacuum cleaner body. By reducing the noise emitted from the vacuum cleaner, it is possible to achieve low noise even when the vacuum cleaner itself is downsized, and the soft cover can also be used as a shock-absorbing bumper, which is of practical use. It is something.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the state in which the dust collection case is taken out in the vacuum cleaner of the present invention, Figs. 2 and 3 are sectional views taken along lines A-A and B-B in Fig. 1, and Fig. 4 is the same as above. A top view of the vacuum cleaner body with the case removed and a partial cross section, Figure 5 is a bottom view of the vacuum cleaner body as above, Figure 6 is a perspective view of the rectifier tube as above, and Figure 7 is with and without a soft cover. It is a noise comparison measurement diagram. l: Vacuum cleaner body, 11: Main filter, 13 Nibli filter, 19: Electric blower, 25: Rectifier cylinder, 25a
: Soft cover, 26: Intake port, 27: Exhaust port.

Claims (1)

[Scope of Claims] 1. A vacuum cleaner body with a filter and an electric blower installed therein, a rectifying tube disposed on the outer circumferential surface of the vacuum cleaner body, and a connecting tube connected to the exhaust side of the electric blower. An inlet and an exhaust port located apart from the intake port are formed to discharge the exhaust air from the electric blower through the rectifying cylinder, and a flexible cover is attached to the surface of the rectifying cylinder. A vacuum cleaner with special features. 2. The vacuum cleaner according to claim 1, wherein grooves are formed on both side surfaces of the vacuum cleaner body, and the rectifying tube is housed in the grooves so that the outer peripheral portion of the rectifying tube projects outward. 3. The rectifier tube is disposed across both sides from the rear end surface of the vacuum cleaner body, and has an intake in the center and exhaust ports in both front ends. vacuum cleaner.