JP3528807B2 - Electric vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects dust in a dust-containing intake air sucked by an electric blower with a dust bag, separates the dust, and then passes through the electric blower to discharge exhaust gas to the outside of the main body. The present invention also relates to an electric vacuum cleaner that recirculates at least a part of discharged exhaust gas to an intake part.

[0002]

2. Description of the Related Art A conventional vacuum cleaner will be described with reference to FIGS.

16 to 18, one end of a hose 9 is connected to a main body 1 containing an electric blower 2, and an extension pipe 30 and a suction tool 35 are connected to the other end of the hose 9 so that the electric blower of the main body 1 is connected. The dust sucked together with the air sucked into 2 is collected by the dust collecting filter 4 in the main body 1. Then, the air purified by the dust collecting filter 4 passes through the electric blower 2 and is discharged from the exhaust outlet 2a of the electric blower 2, and further passes through the filter 16 and the exhaust outlet 1 of the main body 1.
It is configured to be discharged to the outside of the main body 1 from 8.

FIG. 19 shows that the exhaust flow path behind the electric blower 2 is lengthened so that noise is attenuated by discharging it from the exhaust port 58 above the main body 1, and exhaust gas is discharged from above the rear part of the main body 1. This is to prevent the dust from rising on the floor surface, but in order to secure a higher suction force in the operating state at the maximum air volume, the exhaust port 58 is designed to reduce the pressure loss in the exhaust passage. Since the ventilation area was large, the noise was large even in a low air volume operation state.

[0005]

However, in the conventional vacuum cleaner described above, the ventilation of the exhaust port 58 is reduced in order to reduce the pressure loss of the exhaust passage in order to secure a higher suction force in the operating state at the maximum air volume. Since it was necessary to increase the area, the noise of the electric blower 2 was likely to be emitted to the outside of the main body 1 along with the exhaust gas, and a very annoying noise was generated during operation. In addition, dust discharged on the floor may be scattered by the exhaust air discharged from the rear portion of the main body 1.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide a convenient electric vacuum cleaner that realizes suction performance, low noise, and prevention of scattering of floor dust. .

[0007]

Means for Solving the Problems The present invention to achieve the above object, a body with a built-in electric blower, a suction device for sucking dusts, open to the upper side of the body, from the electric blower a body exhaust port for discharging exhaust gas generated to present Karadagaibu, provided in the main body exhaust port, the work to the side of opening the air volume of exhaust gas becomes large, rotating operates to reduce the closing side freely opened and closed Means for up and down the body
At the other end where the rotating shaft of the opening / closing means faces
Since it is arranged below, the traveling means of the main body and
Even when the rear part of the main body is placed on the floor,
When the exhaust gas is not discharged from the air outlet, the opening / closing means
With a structure that closes by its own weight, it can secure a sufficient intake air volume when operating at the maximum air volume and obtain a high suction force, while at the time of operating at a low air volume, the main exhaust port is linked with the exhaust volume, that is, the intake volume. By reducing the passage resistance of the flow passage, the noise of the electric blower is suppressed outside the main body to reduce the noise.

Further , the opening / closing means can be constructed at low cost.
Wear.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
A main body having a built-in electric blower, suction device to suck the dust dust
If, open to the upper side of the main body, a body discharge port for discharging the exhaust gas generated from the electric blower to the present Karadagaibu, the
It is installed in the exhaust port of the main body and operates to open when the air volume of the exhaust increases and to rotate when it decreases.
With the existing opening and closing means , in the vertical direction of the main body,
Arranged below the other end where the rotating shaft of the opening / closing means faces
By doing so, the traveling means of the main body and the rear of the main body
Even when the unit is placed on the floor,
When air is not discharged, the opening / closing means is
With a configuration that closes, the intake air volume is secured to obtain a high intake force during maximum air volume operation, while the exhaust flow is linked to the exhaust volume, that is, the intake air volume, when operating at low air volume. By reducing the passage resistance of the passage, the noise of the electric blower is suppressed outside the main body to reduce the noise.

Further , the opening / closing means can be constructed at low cost.
Wear.

[0011] The invention according to claim 2 of the present invention, a main body having a built-in electric blower, a suction device for sucking the dusts, the present
It opens to the upper side of the body, generated from the electric blower exhaust
A body exhaust port for discharging to the present Karadagaibu, said body outlet
And a rotatable opening / closing means that is operated on the open side when the wind pressure of the exhaust gas is received and that moves on the closed side when the exhaust pressure decreases.
And the opening / closing means in the vertical direction of the main body.
Must be placed below the other end where the rotation axis of
Mount the traveling means of the main body and the rear part of the main body on the floor.
Exhaust gas is exhausted from the exhaust port of the main unit even when it is placed.
When not present, the opening and closing means is closed by its own weight
While operating at the maximum air volume, a sufficient intake air volume can be secured to obtain a high suction force, while at the time of operation at a low air volume, the main body exhaust port is linked to the exhaust volume, that is, the intake volume, and the passage of the exhaust flow path. By reducing the resistance, the noise of the electric blower is suppressed outside the main body to reduce the noise. Further, since the opening / closing means receives the wind pressure and automatically performs the opening / closing operation depending on the strength of the wind pressure, the opening / closing means can be constructed at low cost.

The inventions according to claims 3 and 4 of the present invention are:
The electric blower includes a main body and a suction tool for sucking dust. The main body and the suction tool have an intake passage communicating with the electric blower and at least a part of exhaust gas discharged from the electric blower to the suction tool side. A cover body that has an exhaust passage that recirculates, and that covers the outer periphery of the electric blower by air-tightly communicating the exhaust discharge portion of the electric blower and the main body exhaust passage in the main body, and the inside of the cover body formed in the cover body and the main body. An exhaust gas outlet communicating with the inside is provided, and an opening / closing means for opening / closing the exhaust gas outlet is provided, and by selectively opening / closing the opening / closing means, the exhaust gas is being recirculated or exhausted from the main body. The user can recognize whether or not the user is in the state.

[0013] 5. Symbol mounting of the Invention The present invention, Hirakiji closing unit of the main body exhaust port, the exhaust guiding section is provided an exhaust air in the main body so as to discharge upward from substantially parallel or substantially parallel to the floor surface By doing so, the exhaust gas can be discharged in a discharge direction in which dust does not fly, and clean cleaning can be obtained.

[0014] 6. Symbol mounting of the Invention The present invention, in the exhaust palate is closing means for opening and closing the main exhaust port, by receiving the pre-Symbol exhausted from the exhaust palate upstream, opening motion of the exhaust palate
By providing a wind receiving part that obtains power, the exhaust port lid can be opened widely, the opening degree of the main body exhaust port becomes large, high suction force is obtained, and it is easy for the user to recognize. You can

[0015] 7. Symbol mounting of the Invention The present invention, the retaining surface of the wind receiving unit, which was constructed to be inclined flow side of the substantially vertical or the exhaust to the flow of exhaust, open the exhaust palate large As a result, the degree of opening of the main body exhaust port can be increased, a high suction force can be obtained, and it can be more easily recognized by the user.

[0016] 8. Symbol mounting of the Invention The present invention, by providing a filter having a ventilation pressure loss in an exhaust palate to open and close the exhaust air of the main exhaust port, by utilizing resistance of the filter is subjected exhaust, exhaust palate Can be opened wide, and a high suction force can be obtained, and it is easy for the user to recognize.

According to the ninth and tenth aspects of the present invention, the main body exhaust port has a lattice-shaped portion and an exhaust port, and the exhaust port lid, which is an opening / closing means for opening and closing by exhaust air, has a lattice-shaped portion and a ventilation port. a Department provided, closing of the exhaust palate is configured to close the exhaust port by the lattice-shaped portion of the front Symbol exhaust palate
Along with the flow of exhaust gas, the lattice-shaped portion of the exhaust port lid
Receives the exhaust air and is pushed outwards, and when the exhaust port lid is closed, the ventilation port part of the exhaust port lid is closed by the lattice-shaped part of the main body exhaust port, so that a small opening and closing operation can be performed. Since the exhaust port can be opened and closed, the body can be downsized.

According to an eleventh aspect of the present invention, the exhaust gas generated by the electric blower is discharged to the outside of the main body at the exhaust port of the main body, which opens when the wind pressure of the exhaust exceeds a predetermined value and becomes less than the predetermined value. The opening / closing means that operates toward the closing side is provided with a display unit that displays the amount of dust collected in the dust collection chamber that collects the dust that has been sucked in. The amount of dust collected in the dust collection chamber can be displayed. .

According to a twelfth aspect of the present invention, a cover portion is provided on a side surface side with respect to the opening / closing direction of the exhaust port lid for opening / closing the main body exhaust port, and when the exhaust port lid is opened, the cover part is provided for the main body exhaust port. Oh which it was formed so as to more protrude
It

As a result, the discharge direction of the exhaust gas can be further narrowed down, so that the exhaust gas can be discharged in the discharge direction in which dust is not scattered, and clean cleaning can be obtained.

According to a thirteenth aspect of the present invention, the whistle structure is formed to ring when the opening of the exhaust port lid for opening and closing the exhaust port of the main body is small. As the amount of dust accumulated increases, the amount of opening to the exhaust port lid decreases, and by blowing the exhaust gas to the whistle structure at a high flow rate, it sounds and can notify the user of the amount of dust collected in the dust collection chamber. Therefore, the usability can be improved.

[0022]

EXAMPLES Example 1 Hereinafter, a first example of the present invention will be described with reference to FIGS. 1 to 2A.
An explanation will be given using (b).

Since the whole structure of the electric vacuum cleaner is the same as that of the conventional electric vacuum cleaner, its explanation is omitted. 1 and 2
In (a) and (b), an exhaust filter 104 and an exhaust port 101 are provided behind the main body 101 having the electric blower 120 built therein.
and an exhaust port lid 1 so as to cover the exhaust port 101a.
02 is rotatably provided on a shaft 103. Body 10
When the electric blower 120 in the main body 101 is operated by the operation switch unit 151 configured on the other end side of the hose 150 including the conductive wire whose one end is connected to 1, the dust sucked together with the air sucked by the electric blower 120 Are collected by a dust collecting filter (not shown) provided in a dust collecting chamber (not shown) in front of the electric blower 120. Then, the air purified by the dust collecting filter passes through the electric blower 120 and is discharged from the exhaust outlet 120a of the electric blower 120, and further passes through the exhaust filter 104 and the main body 101.
It is configured to be discharged to the outside of the main body 101 from the exhaust port 101a.

At this time, the exhaust port cover 102 provided so as to cover the exhaust port 101a rotates about the shaft 103,
Move to the position of 2b and open the exhaust port 101a. The exhaust gas discharged from the exhaust port 101a is discharged in parallel with or above the floor surface by the guide portion 105 which is an exhaust gas guide portion for flowing upward.

Explaining the operation of the above structure, the exhaust outlet 1 of the electric blower 120 is passed through the electric blower 120.
The exhaust gas discharged from 20a is further exhausted by the exhaust filter 1
By passing through 04, the fine dust contained in the exhaust gas is filtered and discharged from the exhaust port 101a of the main body 101 to the outside of the main body 101. An exhaust port lid 102 provided so as to cover the exhaust port 101a receives a predetermined wind pressure of exhaust gas and is pushed out of the main body 101 to rotate about a shaft 103.
This means that the exhaust port 101a is opened by moving to the position of b. Since the exhaust gas discharged from the exhaust port 101a flows along the guide portion 105, the exhaust gas is discharged in parallel with or above the floor surface by the guide portion 105 that is obliquely directed upward toward the rear end.

Further, as the amount of dust collected in the dust collecting chamber (not shown) increases, the resistance of the intake air passing through the dust collecting chamber increases, so that the amount of intake air of the electric blower 120 decreases. As the amount of intake air decreases, the amount of air passing through the fan (not shown) of the electric blower 120 decreases, so that the resistance of the fan to the air decreases. That is, the load on the electric blower 120 is reduced, the rotation speed of the electric blower 120 is increased, and noise is increased. However, the intake air volume and the exhaust air volume are reduced, so that the exhaust port lid 10 is reduced.
Since the angle at which 2 opens the exhaust port due to the exhaust is reduced, it is possible to make it difficult for the rotating fan of the electric blower 120 to come out of the main body 101. Therefore, a quiet driving sound can be obtained.

Further, in FIG. 3, the extension pipe 134 and the suction tool 135 are connected to the other end of the hose 150 connected to the main body 101, and the main body 101, the hose 150, the extension tube 134 and the suction tool 135 are sucked by the electric blower 120. Has an air intake passage 136 for the air to be discharged and an exhaust passage 137 for the exhaust air to be discharged from the electric blower 120. The dust sucked by the electric blower 120 from the suction tool 135 through the extension pipe 134 and the hose 150 is forwarded by the electric blower 120. The dust collecting filter (138) provided inside the dust collecting chamber (not shown) collects the dust.
Then, the air purified by the dust collecting filter 138 is recirculated to the vicinity of the intake port 139 of the suction device 135 through the hose 150 and the extension pipe 134 again. The main body 101 includes an exhaust unit 120 of an electric blower 120.
The cover body 121 that covers the outer periphery of the electric blower 120 by communicating airtightly with the main body exhaust passage 160 and the cover body 1
21 and has an exhaust outlet 121a that communicates the inside of the cover body 121 with the inside of the main body 101.
A valve body 123 for opening and closing a in a freely openable and closable manner, and a drive motor 1 for operating the valve body 123 from outside the main body 101 to open and close it.
22 are configured.

The operation of the above structure will be described below.
23 by the operation of the drive motor 122
When the exhaust outlet 121a of the electric fan 120 is opened,
The exhaust gas that has passed through is discharged into the main body 101. Body 1
The exhaust port lid 102 shown in FIG. 2 is provided at the rear of 01, and when the exhaust air volume increases and the exhaust air pressure causes the exhaust pressure to exceed a predetermined value, the exhaust port lid 102 is pushed out of the main body 101 and the shaft 103 It rotates, moves to the position of 102b, and opens the exhaust port 101a. In addition, the drive motor 12
When the exhaust discharge port 121a of the cover body 121 is closed by the valve body 123 by the operation of 2, the exhaust gas discharged from the exhaust discharge part 120a of the electric blower 120 passes from the cover body 121 through the main body exhaust passage 160, the hose 150, and the extension pipe 134. ,
It is returned to the vicinity of the intake port 139 of the suction tool 135 via the exhaust passage 137 of the suction tool 135. Therefore, the main body 2 is operated without being exhausted. At this time, the exhaust port lid 102 at the rear of the main body 101 is closed.

Further, when the exhaust air outlet 121a is opened, a large amount of exhaust air is exhausted from the main body 101 as compared with the amount of recirculated air, so that a sufficient intake air amount can be secured and a high suction force can be obtained, while the exhaust air outlet port 121a. When the valve is closed, a predetermined exhaust gas recirculation state is obtained, and a predetermined suction tool dust collection performance, a quiet operating noise without exhaust air, and a clean cleaning without dust flying can be obtained.

At the same time, whether there is exhaust from the main body 101 to the outside, that is, the above-mentioned exhaust gas recirculation state, or whether there is exhaust air from the main body 101 that can secure a sufficient intake air volume and obtain a high suction force, or not. Operation status of the main unit 101
It is possible to construct a vacuum cleaner with good usability that provides a sense of security that can be recognized from outside.

Although the valve element 123 and the exhaust port lid 102 are operated separately in this embodiment, the opening and closing of the valve element 123 and the exhaust port lid 102 are synchronized by providing another component for connecting both components. However, it goes without saying that the same effect can be obtained.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. The description of the same parts as those in the above embodiment will be omitted.

4 to 7, an exhaust filter 104 and an exhaust port 101a are provided at the rear of the main body 101. Outside the exhaust port 101a, a wall 1 that is an exhaust guide portion that surrounds the exhaust port 101a whose upper side of the main body 101 is an opening.
It is composed of 06. In FIG. 5A, a main body exhaust port, which is an upper opening of a wall 106, is provided with an exhaust port lid 105 that can be opened and closed by rotating about a shaft 103. Axis 1 of exhaust port lid 105
03 is arranged below the other end of the exhaust port lid 105 which faces.

The operation of the above structure will be described below.
The exhaust gas that has exited the exhaust port 101a of 01 is made to flow upward through the wall 106, the upper opening portion of the wall 106 is rotated by the shaft 103, and the exhaust port lid 105 that is openable and closable begins to be exhausted. Is increased, the air pressure is pushed upward by a wind pressure equal to or higher than a predetermined value of the exhaust gas, and the exhaust gas is discharged to the outside of the main body 101. FIG. 5B shows an example in which the exhaust port lid 105 is housed inside the enclosure of the wall 106 immediately after the exhaust port 101a.

6 and 7 show the rear portion 14 of the main body 101.
0a and 140b are used by installing them on the floor of a narrow space such as stairs.
As described above, the exhaust port lid 10 in which the shaft 103 of the exhaust port lid 105 faces in the up-down direction of the main body 101 as described above.
Since it is arranged below the other end of the exhaust port 5, the own weight of the exhaust port lid 105 acts in the direction of closing the upper opening of the wall 106.

Since the discharge direction of the exhaust gas is upward of the main body 101, it is possible to obtain a clean cleaning in which dust is not blown off by the exhaust gas. Further, since the outside of the exhaust port 101a is surrounded by the wall 106 and the flow path for exhausting the exhaust gas is made long, noise such as operating noise of the electric blower 120 emitted to the outside of the main body 101 together with the exhaust gas is attenuated. You can Furthermore, as the amount of dust collected in the dust collection chamber (not shown) increases, the resistance of the intake air passing through the dust collection chamber increases, so the amount of intake air of the electric blower 102 decreases. And
As the amount of intake air decreases, the amount of air passing through the inside of the fan of the electric blower 102 decreases, so that the resistance of the fan to the air decreases. That is, the electric blower 10
Although the load received by No. 2 is reduced and the number of rotations of the electric blower 102 is increased to increase noise, the intake air volume, the exhaust air volume, and the exhaust air pressure are reduced, so that the exhaust port lid 105 is reduced.
Since the opening angle of the main body exhaust port is reduced by the exhaust air, it is possible to make it difficult for the rotating sound of the electric blower to be output to the outside of the main body 101. Therefore, a quieter driving sound can be obtained.

The shaft 103 of the exhaust port lid 105 is attached to the main body 1
In the vertical direction of 01, since the shaft 103 of the exhaust port lid 105 is arranged below the opposite end surface of the opposite end of the exhaust port lid 105, the self-weight of the exhaust port lid 105 is reduced in the direction of closing the upper opening of the wall 106. When operating in an operation mode in which the main body 101 does not exhaust to the outside, the exhaust port lid 105 is in the closed state, and the rear portions 140a and 140b of the main body 101 are installed on the floor of a narrow space such as stairs. It can be maintained in a state, and a clean cleaning that does not cause dust to fly due to exhaust can be obtained. Also, a quiet driving sound can be obtained.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG. The description of the same parts as those in the above embodiment will be omitted.

In FIG. 8, the exhaust port 101 of the main body 101
An upper wall 106 is formed to surround the outer side of a, and an upper opening of the wall 106 is provided with an exhaust port lid 105 which is rotatable by a shaft 103 so as to be opened and closed. Exhaust port lid 105
When air is opened upward by exhaust, a wind receiving plate 105a that receives exhaust and obtains opening power of the exhaust port lid 105 is provided in the exhaust flow path formed by the exhaust port 101a and the wall 106 surrounding the exhaust port 101a. It is provided.

The operation of the above configuration is as follows.

By providing a wind receiving plate 105a for receiving the exhaust gas and obtaining the opening power of the exhaust port lid 105 in the exhaust flow path formed by the exhaust port 101a and the wall 106 surrounding the outside of the exhaust port 101a, the exhaust port lid 105 is provided. Can be opened further upward. As a result, the exhaust gas is discharged in the main body 1 direction.
01 can be directed upward, and a clean cleaning can be obtained in which dust does not fly off due to exhaust.

(Fourth Embodiment) A fourth embodiment of the present invention will be described below with reference to FIGS. 9 and 10. The description of the same parts as those in the above embodiment will be omitted.

9A and 9B, the exhaust filter 104 is attached to the exhaust port cover 108, and the exhaust guide portion 108a of the exhaust port cover 108 closes the exhaust port 101a of the main body 101. This is to push the exhaust filter 104 toward the exhaust port 101a side by the ventilation pressure loss of the exhaust filter 104 when the exhaust gas passes through, and open the exhaust port 101a as shown in FIG. 9B.

10 (a) and 10 (b), the exhaust port lid 110 is formed with a vent hole portion 110b and a lattice portion 110a, and the exhaust port 101a of the main body 101 is connected to the exhaust port lid 110.
The lattice portions 110a of the main body are opposed to each other, and the ventilation port portion 110b of the exhaust port lid 110 is configured so that the lattice portion 101b of the main body is opposed to each other. When the exhaust gas flows, the lattice part 110a of the exhaust port lid 110 receives the exhaust gas and is pushed outward to open the main body 10
After the exhaust gas passes through the exhaust port 101a of No. 1, the exhaust port cover 11
It is discharged after passing through the 0 air vent portion 110b.

The operation of the above configuration is as follows.

As the amount of dust collected in the dust collection chamber increases, the resistance of the intake air passing through the dust collection chamber increases, so the electric blower 1
The intake air volume of 02 decreases. Then, as the intake air volume decreases, the amount of air passing through the inside of the fan of the electric blower 102 decreases, so that the resistance received by the air of the fan decreases. That is, although the load that the electric blower 102 receives decreases and the number of rotations of the electric blower 102 increases and noise increases, the angle at which the exhaust port lid 110 opens the exhaust port 101a due to exhaust air decreases as the intake air volume and the exhaust air volume decrease. Since it is reduced, the rotating sound of the electric blower 102 can be made hard to come out of the main body 101. Therefore, a quiet driving sound can be obtained.

(Fifth Embodiment) A fifth embodiment of the present invention will be described below with reference to FIG. The description of the same parts as those in the above embodiment will be omitted.

In FIG. 11, the exhaust port 10 of the main body 101
An upper wall 106 is formed to surround the outside of 1a, and the upper opening of the wall 106 is provided with an exhaust port lid 105 that can be opened and closed upward by pivoting on a shaft 103 provided on the wall 106 side. . Further, when the cover portion 105b is provided on the side surface side of the exhaust port lid 105 in the opening / closing direction, the cover portion 105b is opened when the exhaust port lid 105 is opened upward by exhaust.
b protrudes from the upper opening, and the exhaust port 101a and the exhaust port 10
The exhaust passage formed by the wall 106 surrounding the outside of the la is formed to be higher.

The operation of the above configuration is as follows.

When the exhaust port lid 105 is opened upward upon receiving the exhaust gas, the exhaust flow channel is extended by the exhaust port lid 105 and the cover portion 105b formed on the side surface portion of the exhaust port lid 105. As a result, the discharge direction of the exhaust gas can be directed to the upper side of the main body 101, and a clean cleaning in which dust does not fly off due to the exhaust gas can be obtained, and noise such as operating noise of the electric blower 102 is attenuated by extending the exhaust flow path. It is possible to reduce noise.

(Embodiment 6) A sixth embodiment of the present invention will be described below with reference to FIGS. The description of the same parts as those in the above embodiment will be omitted.

In FIG. 12, a scale 105c indicating the amount of rotation of the exhaust port cover 105 is provided on the exhaust port cover 105 at the rear of the main body 101. FIG. 13 shows the exhaust port lid 105.
This is an example in which is provided on the top surface of the main body 101.

The operation of the above configuration is as follows.

As the amount of dust collected on the main body 101 increases,
The intake air volume and the exhaust air volume are reduced so that the exhaust port lid 105
The rotation amount of is small. Scale 105 of exhaust port lid 105
When the user recognizes c, the intake air volume decreases, that is,
It is possible to know the time when the suction force is lowered and the time when the dust is removed from the dust collection chamber, and it is possible to improve the usability.

14 and 15, a whistle 111 composed of a blade 111b vibrating by the flow of exhaust gas and a ventilation part 111a is provided immediately after the exhaust port lid 105,
Exhaust port cover 1 due to increased dust collection and reduced intake air volume
When the rotation amount of 05 decreases, the wind speed of the exhaust gas flowing inside the whistle 111 increases, causing the blade 111b to vibrate and ring. As a result, the user can perceive the reduction of the suction force and the time when the dust is collected in the dust collecting chamber by hearing, and the usability can be further improved.

[0056]

According to the present invention, the exhaust gas generated by the electric blower of the main body is discharged to the outside of the main body at the main body exhaust port,
By opening and closing means that opens when the electric blower operates and closes when stopped, a sufficient intake air volume can be secured to obtain a high suction force when operating at maximum air volume, while the main body exhaust port is opened when operating at low air volume. The exhaust passage area can be reduced in conjunction with the amount of exhaust air, that is, the amount of intake air, and the noise of the electric blower can be suppressed outside the main unit to reduce the noise, and the suction performance and noise can be reduced and dust on the floor can be scattered. It is possible to provide a convenient electric vacuum cleaner that is prevented.

[Brief description of drawings]

FIG. 1 is an external perspective view of an electric vacuum cleaner showing a first embodiment of the present invention.

2 (a) is a partial sectional view taken along line AA of FIG. (B) Enlarged cross-sectional view of part B of FIG.

FIG. 3 is an overall sectional view of the electric vacuum cleaner.

FIG. 4 is a sectional view of an essential part of an electric vacuum cleaner showing a second embodiment of the present invention.

5 (a) is an enlarged view of part C in FIG. (B) An enlarged cross-sectional view of a main part of the electric vacuum cleaner showing the other configuration example

FIG. 6 is a partially cutaway side view showing an installation state of the electric vacuum cleaner.

FIG. 7 is an enlarged cross-sectional view of section D in FIG.

FIG. 8 is an enlarged sectional view of an essential part of an electric vacuum cleaner showing a third embodiment of the present invention.

FIG. 9A is an enlarged sectional view of an essential part of an electric vacuum cleaner showing a fourth embodiment of the present invention. FIG. 9B is an enlarged sectional view of an essential part of the electric vacuum cleaner in an operating state.

FIG. 10A is an enlarged cross-sectional view of a main part of another example of the electric vacuum cleaner, and FIG. 10B is an enlarged cross-sectional view of an essential part of another example of the electric vacuum cleaner in an operating state.

FIG. 11 is an enlarged sectional view of an essential part of an electric vacuum cleaner showing a fifth embodiment of the present invention.

FIG. 12 is an external perspective view of an electric vacuum cleaner showing a sixth embodiment of the present invention.

FIG. 13 is a partially cutaway side view of another example of the electric vacuum cleaner.

FIG. 14 is a sectional view of a main part of another example of the electric vacuum cleaner.

FIG. 15 is an enlarged sectional view of an F portion of FIG.

FIG. 16 is an external perspective view showing a conventional electric vacuum cleaner.

FIG. 17 is a sectional view showing the same electric vacuum cleaner.

FIG. 18 is a cross-sectional view of main parts showing the same electric vacuum cleaner.

FIG. 19 is a cross-sectional view of main parts of another example of the electric vacuum cleaner.

[Explanation of symbols]

101 main body 105 Exhaust port lid 120 electric blower 121 cover body

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasunori Tsuzaki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Yasushi Fujiwara 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. Company (72) Inventor Masafumi Okushima 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Tetsuji Nomachi 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP 2001-70203 (JP, A) Jitsuko 38-23831 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/00 A47L 9/00 103

Claims (13)

(57) [Claims] And 1. A body with a built-in electric blower, a suction device for sucking dusts, open to the upper side of the body, body exhaust port for discharging the exhaust gas generated from the electric blower to the Karadagaibu And a rotatable opening / closing means that is provided at the main body exhaust port and that operates to open when the air volume of the exhaust increases and closes when it decreases.
The other end where the rotating shaft of the opening / closing means faces each other.
By arranging it below the main body,
And the rear part of the main body is placed on the floor,
When the exhaust gas is not discharged from the exhaust port, the opening / closing means
Is an electric vacuum cleaner configured to close by its own weight . 2. A body having a built-in electric blower, a suction device for sucking dusts, open to the upper side of the body, body exhaust port for discharging the exhaust gas generated from the electric blower to the Karadagaibu And a rotatable opening / closing means that is provided at the main body exhaust port and that operates to open when receiving the wind pressure of the exhaust and that moves to the closing side when the exhaust pressure decreases, in the vertical direction of the main body.
At the lower side of the other end where the rotating shaft of the opening / closing means faces
By arranging it in one direction,
Even if the rear part of the main unit is placed on the floor,
When the exhaust gas is not discharged from the mouth, the opening / closing means automatically
An electric vacuum cleaner configured to close by weight . 3. A body including an electric blower and a suction tool for sucking dust, the main body and the suction tool include an intake passage communicating with the electric blower, and at least a part of exhaust gas discharged from the electric blower. Is formed in the cover body, and a cover body that covers the outer periphery of the electric blower by air-tightly communicating the exhaust discharge portion of the electric blower and the main body exhaust passage to the main body. The vacuum cleaner according to claim 1 or 2, further comprising: an exhaust gas discharge port that communicates the inside of the cover body and the inside of the main body, and an opening / closing unit that opens and closes the exhaust gas discharge port. 4. The electric vacuum cleaner according to claim 3, further comprising opening / closing means for selectively opening / closing the exhaust outlet. Hirakiji of 5. A body outlet opening and closing means, either the exhaust air formed by providing the exhaust guide portion to the main body so as to discharge upward from substantially parallel or substantially parallel to the floor surface according to claim 1-4 in 1
Vacuum cleaner according to the item. 6. A exhaust palate is a closing means for opening and closing the main exhaust port to receive the exhaust upstream of the pre-Symbol exhaust palate
In vacuum cleaner according to any one of claims 1-5 comprising providing a wind receiving unit to obtain the opening force of the exhaust palate. 7. The retaining surface of the wind receiving unit, electric vacuum cleaner according to claim 6 Symbol mounting configured to be inclined flow side of the substantially vertical or the exhaust to the flow of exhaust. 8. A exhaust palate is a closing means for opening and closing the main exhaust port, the vacuum cleaner according to any one of claims 1-7 comprising providing a filter having a ventilation pressure loss. 9. The main body exhaust port has a lattice-shaped portion and an exhaust port, and the exhaust port lid, which is an opening / closing means that opens and closes by exhaust air, is also provided with a lattice-shaped portion and a vent portion, and when the exhaust port lid is closed.
Is configured to configured to close the exhaust port by the lattice-shaped portion of the front Symbol exhaust palate, the exhaust flow, the exhaust palate
The vacuum cleaner according to any one of claims 1 to 8, wherein the lattice-shaped portion of (1) receives the exhaust air and is pushed outward . 10. When the exhaust port lid is closed, the ventilation port portion of the exhaust port lid is closed by the lattice-shaped portion of the main body exhaust port.
The electric vacuum cleaner described in 9 . 11. An opening / closing means that opens to a main body exhaust port through which exhaust gas generated by an electric blower is discharged to the outside of the main body and opens when the wind pressure of the exhaust gas exceeds a predetermined value and closes when the wind pressure of the exhaust gas falls below a predetermined value, The electric vacuum cleaner according to any one of claims 2 to 10 , further comprising: a display unit configured to display a dust collection amount of a dust collection chamber that collects sucked dust. 12. A cover portion is provided on a side surface side with respect to an opening / closing direction of an exhaust port lid which opens and closes a main body exhaust port, and the cover portion is formed to project from the main body exhaust port when the exhaust port lid is opened. The vacuum cleaner according to any one of 1 to 11 . 13. The state quantity is small opening of the exhaust palate for opening and closing the main exhaust port, the vacuum cleaner according to any one of claims 1 to 12 by forming a whistle structure sounding.