JPH02113Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a vacuum cleaner in which an electric blower is covered with a motor case.

Conventional technology In conventional vacuum cleaners, for example,
As shown in Publication No. 55-91641, there was an electric blower covered with a motor case. This motor case is designed to block out the noise generated by electric blowers and other devices, making the vacuum cleaner quieter. Then, the exhaust gas from the electric blower passes through the soundproofing material around the outer periphery of the motor section, reaches the inside of the main body from the exhaust port of the motor case, and is then radiated to the outside from the main body exhaust port covered with the soundproofing material.

Problems to be Solved by the Invention By the way, in the above conventional configuration, the exhaust gas flowing into the motor case is concentrated at the motor case exhaust port, and then flows out into the space between the main body and the case. Therefore, the speed of the exhaust gas when passing through the motor case exhaust port is high, and wind noise is generated here. Furthermore, the exhaust gas coming out of the motor case exhaust port inevitably becomes turbulent as it flows into the space within the main body, which has a larger cross-sectional area than the exhaust port, and noise is also generated here.

As a result, even if a motor case was installed, the overall effect of reducing noise could not be expected to be great.

The present invention solves these conventional problems and makes the vacuum cleaner even quieter.

Means for Solving the Problems In order to solve these conventional problems, the present invention consists of a main body, a motor case housed in the main body, a motor case housed in the motor case, and an exhaust port with ventilation. an electric blower covered with a first soundproofing material having a second soundproofing material, and a second soundproofing material having air permeability and covering an outlet side of an exhaust port formed in the motor case and filled between the motor case and the main body. It is something.

Effects According to the above structure of the present invention, the exhaust gas coming out from the exhaust port of the motor case passes through the packing which has ventilation, so there is no wind noise, and in the process of passing the exhaust gas, it is rectified and noise caused by turbulence is generated. occurrence will also be eliminated.

Embodiment The embodiment will be described below with reference to the drawings.
Reference numeral 1 is a main body of a vacuum cleaner, 2 is a dust collection box having an intake hole 3, and a handle 4 is disposed on the upper part of the dust collection box. 5 is a filter device built into the dust collection box 2. The dust collection box 2 is removably attached to the main body 1 by a buckle mechanism 6 provided on the handle.

7 is a cord winding device built into the lower part of the main body 1, and a substantially cylindrical bottomed motor case 8 is mounted above the cord winding device.
It has a built-in electric blower 9 attached to it, and an operation switch 10 and a dust indicator 1 on the top.
1. Main printed circuit board 12 incorporating a control circuit for controlling input of electric blower 9, etc.; LED printed circuit board 1 equipped with light emitting diode 13;
It has a built-in 4th grade.

The main body 1 is composed of a right main body 15 and a left main body 16, each of which is provided with a cord winding device chamber 17 and a cord winding device chamber 17 from below.
By forming and connecting partition walls 20 and 21 that form the electric blower chamber 18 and the functional parts chamber 19, each of the above-mentioned devices is held and fixed.

22 is an exhaust filter disposed at the rear of the electric blower chamber 18, 23 is a main body exhaust port, and 24 is a main body handle disposed in a concave shape in the upper part thereof.

25 is a fan motor section 9' of the electric blower 9.
26 is the front cushioning rubber attached to the front cushioning rubber. The motor case 8 has the front cushioning rubber 2
5. The electric blower 9 is held via the rear cushioning rubber 26, and the right main body 15 and the left main body 16 hold the motor case rubber 27 and the front buffer rubber 25, which are arranged on both sides of the outer periphery.

Reference numeral 28 indicates a first soundproofing material having air permeability wrapped around the outer periphery of the electric blower 9 in order to reduce noise, and 29 also indicates a case bottom lining made of a sound absorbing material attached to the bottom of the motor case 8 for the same purpose.

8' is a motor case exhaust port formed in the motor case 8. A substantially triangular prism-shaped second soundproofing material 30 is disposed to cover the motor case exhaust port 8'. The second soundproofing material 30 is
One side of it is connected to the motor case exhaust port 8', and the other side is
The soundproofing material 28 is assembled with its surfaces in contact with the inner wall surfaces of the main body, and its air permeability is set to be better than that of the first soundproofing material 28.

Specific materials for the second soundproofing material 30 include:
For example, polyurethane foam or the like with low pressure loss can be considered.

In the above configuration, the exhaust air from the electric blower 9 flows through the exhaust port 9'', the motor case exhaust port 8', and the main body exhaust port 2 in this order. The soundproofing material 28, the second soundproofing material 30, and the exhaust filter 22 absorb the sound generated in each part and reduce the sound generation itself.

In particular, the sound energy inside the motor case 8 including the electric blower 9 is strong, and the second soundproofing material 30 covering the motor case exhaust port 8' is highly effective and contributes greatly to noise reduction.

Furthermore, by bringing the second soundproofing material 30 into contact with the inner wall of the main body, the speed at which the exhaust air collides with the inner wall of the main body is reduced, and furthermore, the collision sound is absorbed.

In addition, as another embodiment, as shown in FIGS. 5 and 6, a rotatable blade 31 disposed at one motor case exhaust port 8' of the motor case 8,
A variable resistor (not shown) linked to the blades 31 is placed in the motor case 8, and the rotational speed of the electric blower 9 can be controlled by changing the rotation angle of the blades 31 depending on the exhaust air volume and exhaust air speed. In the case of a motor to be controlled, by attaching the second soundproofing material 30, it is possible to reduce noise, smooth the flow of air inside the motor case 8, stabilize the operation of the blades 31, or stabilize the operation. It is now possible to change the state, ensure reliable control, and widen the control range.
The effect is huge.

Effects of the invention As is clear from the above explanation, the invention has great practical value, such as suppressing wind noise and noise caused by exhaust turbulence, and providing a vacuum cleaner that is excellent in noise reduction. It is something.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of a vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a sectional view of main parts of the vacuum cleaner's motor case and electric blower, and Fig. 3 is the same motor case. Figure 4 is an exploded perspective view of the motor case and electric blower, and Figure 5 is a cross-sectional view of the motor case and electric blower in another embodiment of the present invention. 6 is a sectional view taken along line A-A in FIG. 5. DESCRIPTION OF SYMBOLS 1...Main body, 8...Bottomed motor case, 8'...Motor case exhaust port, 9...Electric blower, 28...First soundproofing material, 30...Second soundproofing material.

Claims (1)

[Scope of utility model registration request] A main body, a motor case housed in the main body, an electric blower housed in the motor case and having an exhaust port covered with a first soundproofing material having ventilation, and an outlet of the exhaust port formed in the motor case. A vacuum cleaner comprising: a second soundproofing material having air permeability, which covers the side of the vacuum cleaner and is filled between the motor case and the main body.