JPS6325774B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> 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.

<Prior art> 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 the electric blower located at the rear The length of the exhaust passage connecting the exhaust port and the exhaust port is short, and there is a limit to the noise reduction of the exhaust air by the shape of the exhaust passage or the sound-deadening material installed in the passage. As technology advances, the space required for noise reduction becomes smaller, making it extremely difficult to achieve low noise levels.

In order to solve this problem, as in Japanese Utility Model Application Publication No. 49-96766, a low-speed exhaust section having a low-speed exhaust port is provided at the rear of the vacuum cleaner main body case, and a large number of exhaust small exhaust holes are provided all around the vacuum cleaner main body case. An engagement groove for engaging a hollow tubular bumper having a hole is provided, and the engagement groove securely holds the bumper and connects the air inlet of the bumper to the low-speed exhaust port, and There was one that had a long exhaust passage surrounding it.

<Problems to be Solved by the Invention> With a vacuum cleaner configured as described above, air from the low-speed exhaust port passes through the bumper and is exhausted from the small exhaust hole in the bumper, resulting in large ventilation resistance. The suction force is small, making it impossible to clean efficiently, and since the vacuum cleaner body is exhausted from around the case through a bumper, the exhaust air hits the user and causes discomfort. An object of the present invention is to provide a vacuum cleaner that eliminates the above-mentioned drawbacks.

<Means for Solving the Problems> The vacuum cleaner of the present invention is intended to solve the above-mentioned drawbacks, and the details thereof will be described together with FIGS. 1 to 7 showing an embodiment of the present invention. explain.

As shown in FIGS. 1 to 7, the vacuum cleaner of the present invention includes a vacuum cleaner body 1 in which a filter 11 and an electric blower 19 are housed, and an exhaust port 22 is provided at the rear end of the vacuum cleaner body 1. , by arranging a plurality of rectifying ribs 30 extending to the bottom surface of the vacuum cleaner body 1 in parallel on the left and right sides of the front end of the vacuum cleaner body 1, a distributed exhaust port 29 that opens at the bottom surface of the vacuum cleaner body 1 is provided;
The exhaust port 22 is aligned with the intake port 26 of the straightening tube 25 that rectifies the exhaust air, and the distributed exhaust port 29 and the exhaust port 2 are located apart from the intake port 26.
7, and the rectifying cylinder 25 is disposed on the outer peripheral surface of the cleaner main body 1.

<Function> In the vacuum cleaner configured as described above, when exhaust air is exhausted from the exhaust port 22 of the vacuum cleaner body 1, the exhaust gas enters the rectifying tube 25 from the intake port 26 and is rectified within the rectifying tube 25. The flow passes through the exhaust port 27 of the straightening tube 25, is rectified again by the straightening rib 30 of the distributed exhaust port 29, and flows through the distributed exhaust port 2 on the bottom surface of the vacuum cleaner body 1.
Exhausted from 9.

<Example> An example of the vacuum cleaner of the present invention will be described with reference to FIGS. 1 to 7.

In FIGS. 1 to 6, a vacuum cleaner main body 1 is composed of an upper case 2 and a lower case 3, and has running wheels 4 on both sides of the rear part and swivel wheels 5 on the bottom surface of the front part. A storage chamber 6 with an opening at the top is formed at the front of the vacuum cleaner body 1, and a suction cylinder 7 for connecting a dust collection hose (not shown) is provided on the front wall of the storage chamber 6. are doing.

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 packing 12 on the outer periphery, and a pre-filter 13 is installed between the dust suction port 10 and the main filter 11. are placed. Then,
In the stored state, the dust collection case 8 forms an air passage from the suction cylinder body 7 to the ventilation port 14 on the rear wall of the storage chamber 6 via the dust suction port 10, the prefilter 13, and the main filter 11. The top opening of the storage chamber 6 is opened and closed by a top lid 15 pivotally mounted on the cleaner body 1.

Further, the cleaner body 1 is divided into a cord reel chamber 16 and a ventilation chamber 17 on the left and right at a rear position of the storage chamber 6, and a cord reel 18 is housed inside the cord reel chamber 16. On the other hand, in the ventilation chamber 17, an electric blower 19 is internally supported with anti-vibration rubber 20, 21, and the suction side of the fan is located opposite to the ventilation port 14, and the exhaust side is located on the rear end surface of the vacuum cleaner body 1. It is located opposite to the exhaust port 22. Electric blower 19
A sound deadening material 23 such as urethane foam is wrapped around the outer periphery of the motor portion, and the sound deadening material 23 is supported by a porous sound deadening plate 24 made of a material such as rubber.

The rectifier tube 25 has a U-shape in plan and is disposed spanning from the rear end surface of the cleaner body 1 to near the front ends of both side surfaces, and has a central portion that matches the exhaust port 22 so that air can flow through the port 22. An intake port 26 communicating with the exhaust side of the electric blower 19 is formed, and exhaust ports 27, 27 are formed on the lower surface of both front ends. The rectifier tube 25 is housed in a groove 28 of the vacuum cleaner body 1, with its outer circumferential portion slightly protruding outward.In this embodiment, the rectifier tube 25 is made of a low-foam material such as polyurethane or soft vinyl chloride. By forming the rectifying cylinder 25 using an elastic material such as resin, the rectifying cylinder 25 itself can also be used as a shock absorbing bumper. The groove 28 is on the top,
It is located between the lower cases 2 and 3 and is formed spanning from the rear end surface of the vacuum cleaner body 1 to near the front end of both sides.
A distributed exhaust port 29 is formed on the lower surface of the front end thereof, and extends to the bottom surface of the cleaner body 1 and has a plurality of straightening ribs 30, 30 arranged in parallel.
It matches the exhaust port 27 of.

In the embodiment of the above configuration, the electric blower 19
When the is driven, air containing dust enters the dust collecting case 8 through a suction port (not shown), a dust suction hose, the suction cylinder body 7, and the dust suction port 10, and inside this case, the coarse dust is collected by the prefilter 13 and transferred to the main filter 11. After each fine dust is collected and removed and purified, it is sucked into the electric blower 19 through the vent 14, and the dust is accumulated in the dust collection case 8. The air discharged from the electric blower 19, that is, the exhaust air, passes through the sound deadening material 23 and the porous sound deadening plate 24, enters the straightening tube 25 from the exhaust port 22 through the intake port 26, and is divided into left and right sides. 25 and from the exhaust ports 27, 27 to the distributed exhaust ports 29, 29.
After that, it will be discharged outside the aircraft. Since the rectifier cylinder 25 has a sufficient dimensionally length, it can exert a sufficient rectifying effect on the flow of exhaust air, and the wind speed is weakened due to the flow being divided to the left and right. Wind noise can be greatly attenuated, and the rectifying effect of the rectifying ribs 30, 30, .

FIG. 7 shows another embodiment of the present invention, in which the rectifier cylinder 25
The wall surface of the end on the side of the exhaust port 27 is formed into an arcuate surface 25', and the end of the rectifying rib 30 is also formed into the surface 25'.
It is curved in an arc shape to match. Then,
In this case, the flow direction of the exhaust air can be changed gently. This is more preferable in terms of noise suppression.

Note that the rectifying tube 25 may be disposed on the outer circumferential surface of the cleaner body 1, and is not limited to being disposed across both side surfaces from the rear end surface. Further, although the rectifying tube 25 is housed in the groove 28 of the cleaner body 1 so that the outer circumferential portion thereof slightly protrudes outward, the rectifying tube 25 does not need to protrude outward, or may be provided so that the entire body protrudes. .

<Effects of the Invention> In the vacuum cleaner of the present invention, when exhaust air is exhausted from the exhaust port of the vacuum cleaner body, the exhaust gas enters the rectifying cylinder from the intake port, is rectified within the rectifying cylinder, and the air is discharged from the rectifying cylinder. The air passes through the exhaust port, is rectified again by the rectifying rib of the distributed exhaust port, and is exhausted from the distributed exhaust port on the bottom of the vacuum cleaner body, so the distributed exhaust port can be provided large and the air resistance during exhaust is reduced. This prevents the air from becoming too large, allowing for efficient cleaning with a large suction force, and eliminating the possibility of causing discomfort to the user since the exhaust air does not directly hit the user.

Furthermore, the exhaust air is rectified by a rectifier tube provided on the outer circumferential surface of the vacuum cleaner body, and then rectified again by the distributed exhaust port for exhaust, so the vacuum cleaner body can be made smaller and this rectification effect can be improved. This can attenuate wind noise, resulting in very low noise levels.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the vacuum cleaner of the present invention with the dust collection case taken out, Figs. 2 and 3 are cross-sectional views taken along lines A-A and B-B in Fig. 1, and Fig. 4 is the same as above. FIG. 5 is a bottom view of the vacuum cleaner body with the case removed and a part thereof shown in cross section, FIG. 6 is a perspective view of the rectifying tube as above, and FIG. 7 is another embodiment of the present invention. FIG. 3 is a sectional view of a main part showing an example. 1: Vacuum cleaner body, 11: Main filter, 1
3: Prefilter, 19: Electric blower, 25:
Rectifier tube, 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, an exhaust port provided at the rear end of the vacuum cleaner body, and a bottom surface of the vacuum cleaner body on the left and right sides of the front end of the vacuum cleaner body. By arranging a plurality of straightening ribs that extend up to An electric vacuum cleaner characterized in that an exhaust port and an exhaust port located apart from the intake port are aligned with each other, and the rectifying cylinder is disposed on the outer peripheral surface of the vacuum cleaner main body. 2. The vacuum cleaner according to claim 1, wherein a groove is formed on the outer circumferential surface of the vacuum cleaner body, and a rectifying cylinder is housed in the groove. 3. The vacuum cleaner according to claim 1, wherein rectifying tubes made of an elastic material are disposed on at least both sides of the vacuum cleaner body. 4. The vacuum cleaner according to claim 3, 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 rectifier tube projects outward. 5. Claim 1 or 3, wherein the rectifier tube is disposed from the rear end surface to both side surfaces of the vacuum cleaner main body, and has an intake port in the center and exhaust ports in both front ends. vacuum cleaner.