JPS6325773B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a vacuum cleaner whose main body is elongated in the front and back direction, has a dust collection section in the front part, and has an electric blower, a cord reel, etc. installed in the rear part. In particular, the present invention relates to a noise reduction structure aimed at reducing noise caused by exhaust air from an electric blower.

<Prior art> Generally, in the case of this type of vacuum cleaner, which has a long main body in the front-rear direction and houses a dust collection section in the front and a blower in the rear, the exhaust air from the electric blower is sent to the exhaust air at the rear end of the vacuum cleaner body. Because the structure is such that the exhaust is discharged from the machine through the mouth, the length of the exhaust passage connecting the electric blower located at the rear and the exhaust port is short, and the shape of the exhaust passage and the sound-deadening material installed in the passage make it possible to reduce the amount of exhaust air. There is a limit to how much noise can be reduced, and especially as vacuum cleaners become smaller in size, the space required for noise reduction becomes smaller, making it extremely difficult to achieve low noise levels. .

Therefore, for example, Utility Model Publication No. 52-1504,
Publication No. 54-174266 proposes a way to make the exhaust passage slightly longer than the above one by forming a folded passage around the electric blower. In addition, considering the need to make the main unit more compact, this exhaust passage is extremely narrow and has to be extremely bent, which increases airflow resistance and reduces the intake air volume by reducing the exhaust volume of the electric blower. There was a problem of decreasing.

To make the exhaust passage longer, JP-A-52
- In Publication No. 35475, a device in which a spiral passage is formed around the blower is also proposed.
Such a spiral exhaust passage has the problem of complicating the structure of the vacuum cleaner, further increasing the above-mentioned exhaust resistance, and reducing the intake amount.

<Problems to be Solved by the Present Invention> The problem is to reduce the noise caused by exhaust air by forming the longest exhaust passage without complicating the structure of the vacuum cleaner or increasing the exhaust resistance of the blower. The aim is to reduce

<Means for solving the problem> An exhaust passage is formed inside the vacuum cleaner body along the outer periphery of the body, extending all the way around the body,
One end of the exhaust passage is connected to the exhaust side of the electric blower on the rear side of the main body, and the other end of the exhaust passage is connected to the exhaust port, so that the rear end of the main body is connected from the exhaust side of the electric blower. A single exhaust passage is formed through the exhaust passage to the front end and then back to the rear end, and on the inside of this exhaust passage, the dust collecting section and the electric blower,
A vacuum cleaner that houses a cord reel.

<Function> The exhaust gas discharged from the electric blower flows into the exhaust passage at the rear end of the main body, passes from this rear end to the front end of the main body, returns to the rear end of the main body, goes around the main body along the outer periphery, and is exhausted. expelled from the mouth. During this time, the noise caused by the blowing air is attenuated and exhausted as a low-noise air stream. In this case, since the exhaust passage is formed along the outer periphery of the main body, there are few twists and turns in the passage and the ventilation resistance is small.

<Examples> Examples 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 provided with 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 having an opening on the top surface is formed in the front part of the vacuum cleaner main body 1, and both side walls 6a, 6b and front wall 6c of this storage chamber 6 are the inner surfaces of the both side walls 1a, 1b of the vacuum cleaner main body 1, and the front An appropriate space 7 is formed between the wall 1c and the inner surface of the wall 1c. The cylindrical body 8 has one end opened outside the front wall 1c and the other end opened inside the front wall 6c, and is located across the space 7, and the outer open end is connected to the intake port 9. None: The intake port 9 is in communication with the storage chamber 6.

A dust collection case 10, 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 1 is pivoted so that it can be opened and closed, and a main filter 13 is airtightly fitted to the rear end opening with a packing 13' on the outer periphery, and a pre-filter is installed between the dust suction port 12 and the main filter 13. 14 are placed. Thus, in the stored state, the dust collection case 10 communicates the dust inlet 12 with the inlet 9, and connects the inlet 9 to the inlet 1.
2. Pre-filter 14, main filter 13
An air passageway is formed which reaches the ventilation hole 15 in the rear wall 6d of the storage chamber 6 through the storage chamber 6. Incidentally, the top opening of the storage chamber 6 is opened and closed by a top lid 16 pivotally mounted on the cleaner body 1.

Further, the vacuum cleaner main body 1 is divided into a cord reel chamber 17 and a ventilation chamber 18 on the left and right at a rear position of the storage chamber 6, and a cord reel 19 is installed inside the cord reel chamber 17. On the other hand, an electric blower 20 is internally supported in the blower chamber 18 with anti-vibration rubbers 21 and 22, and the suction side of the fan is positioned opposite to the vent 15. A sound deadening material 23 such as urethane foam is wrapped around the outer periphery of the motor portion of the electric blower 20, and the sound deadening material 23 is supported by a porous sound deadening plate 24 made of a material such as rubber. Further, an appropriate space 25 is formed between the side wall 17a of the cord reel chamber 17 and the side wall 18a of the ventilation chamber 18 and the side walls 1a and 1b of the cleaner body 1.
25, and these spaces 25, 25 communicate with the space 7 to form an exhaust passage A from the rear end of the cleaner main body 1 to the front end and back to the rear end. The end of the passage A is an exhaust port 26 formed by drilling a number of holes in the rear wall 1d of the cleaner body 1.
Continuing to. Further, the starting end of the exhaust passage A communicates with the ventilation chamber 18 via a U-shaped communication passage 27. This communication path 27 is formed between a rib 28 that holds the motor side of the electric blower 20 and the rear end of the side wall 18a, and a sound deadening material 29 such as urethane foam is attached to the circumferential surface of this communication path 27. Further, each corner of the exhaust passage A and the exhaust port 26 are also covered with sound deadening material 3 such as urethane foam.
0,31 is pasted. 32 indicates a bumper.

In the embodiment of the above configuration, the electric blower 20
When the is driven, air containing dust enters the dust collecting case 10 through a suction port (not shown), a dust suction hose, the suction port 9, and the dust suction port 12. After the fine dust is collected, removed, and purified, it is sucked into the electric blower 20 through the vent 15. Then, the air discharged from the electric blower 20, that is, the exhaust air, passes through the sound deadening material 23 and the porous sound deadening plate 24, enters the exhaust passage A from the communication path 27, and from this exhaust passage A passes through the sound deadening material 31 and reaches the exhaust port 26. It will be discharged from the aircraft. Since the exhaust passage A is very long, making effective use of the front and rear dimensions of the vacuum cleaner body 1, it has a large rectifying effect on the flow of exhaust air, and can greatly attenuate wind noise. Moreover, by providing the sound deadening material 30 at each corner, the wind collision noise can be reduced, and the overall noise can be significantly reduced.

In the above-mentioned embodiment, since the space for noise reduction (exhaust passage A) can be enlarged, it is possible to take various noise reduction measures as appropriate, without being limited to the use of sound reduction materials such as urethane foam.

<Effects> According to the present invention, by discharging the exhaust air from the blower through the exhaust passage that goes around the main body along the outer periphery of the main body, it is possible to attenuate the noise caused by the blowing air, and to reduce the noise of the vacuum cleaner. It is possible to realize noise reduction.

Since this exhaust passage is formed so as to go around the main body along the outer periphery of the main body, a long passage length can be ensured, and noise caused by air blowing can be sufficiently reduced.

In this case, since the exhaust passage is formed along the outer periphery of the main body, the structure is simple, there are relatively few twists and turns, and there is little ventilation resistance. Therefore, even though the length of the exhaust passage is long, exhaust can be performed smoothly and without resistance, and as a result, the air intake amount of the blower does not decrease and the amount of dust suction does not decrease.

Moreover, the dust collection unit, blower, and cord reel are housed inside the exhaust passage formed along the outer periphery of the main body, so even though they form a relatively long passage, the internal structure of the vacuum cleaner It is possible to provide a compact and practical vacuum cleaner without making it complicated.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional configuration diagram of the vacuum cleaner of the present invention, and FIG. 2 is a schematic cross-sectional configuration diagram of the same. 1: Vacuum cleaner body, 2: Intake port, 10: Dust collection case (dust collection part), 19: Cord reel, 20: Electric blower, 26: Exhaust port, A: Exhaust passage.

Claims (1)

[Scope of Claims] 1. A vacuum cleaner body that is long in the front and rear direction, a dust collection section provided on the front side of the vacuum cleaner body, and an electric blower and a cord reel provided on the rear side of the vacuum cleaner body, An air intake port communicating with the dust collection section is provided at the front end of the vacuum cleaner body, and an exhaust port is provided at the rear end of the vacuum cleaner body for discharging the airflow from the electric blower, and , an exhaust passage is formed along the outer periphery of the main body over the entire circumference of the main body, and one end of the exhaust passage is connected to the exhaust side of the electric blower at the rear side of the main body, and the other end of the exhaust passage is connected to the exhaust side of the electric blower. The side of the electric blower is connected to the above-mentioned exhaust port to form a single exhaust path from the exhaust side of the electric blower, through the rear end of the main body, through the front end and back to the rear end, and on the inside of this exhaust passage. , a vacuum cleaner comprising the above-mentioned dust collecting section, an electric blower, and a cord reel.