JP2003325387A - Central cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easily fittable central cleaner with saved space. <P>SOLUTION: An electric blower 20 is provide in a duct 21 provided to communicate outside with inside of an outer wall 25 of a residence, and a dust collecting chamber 28 is provided on an indoor side 23 as a suction side of the electric blower 20. A hose having a suction nozzle is detachably connected to the dust collecting chamber 28. The central cleaner for a single room with saved space and easily fittable is thereby provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a central cleaner for a private room.

[0002]

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

In the figure, reference numeral 1 denotes a central cleaner main body installed outdoors, and a main body 1 has a dust collection chamber having an electric blower 10 for suction and a dust separating filter 2 provided on the suction side of the electric blower 10. 3 and 3 are built in. Reference numeral 4 denotes a dust collecting pipe branched from the central cleaner body 1 into the room. One end of the dust collecting pipe 4 is connected to the suction hole 5 of the central cleaner body 1 that faces the room through the outer wall 8 of the house, and the other branched ends open into the respective rooms to form the outlet part 7. . A hose / extension pipe having a suction nozzle 6 is detachably attached to the outlet portion 7.

When the hose / extension pipe having the suction nozzle 6 is connected to the outlet part 5 of the room to be cleaned and the central cleaner body 1 is operated, it is communicated with the suction part of the electric blower 10 through the dust collecting pipe 4. A suction force is generated in the suction nozzle 6, and the dust in the room is sucked by the flow indicated by the arrow 11.
The sucked dust is accumulated in the dust collection chamber 3, and then the air is discharged to the outside through the exhaust port 9.

The advantages of this central cleaner are that the central cleaner body 1 having the electric blower 10 built therein can be installed outdoors, so that the indoor side has low noise and can be exhausted to the outside, so that a clean environment can be obtained.

[0006]

However, in the conventional central cleaner, since the pressure loss of the dust collecting pipe 4 piped in the room is large, the electric blower 10 needs a large capacity, and the large central cleaner body 1 is You will need
In addition, there are issues such as being unsuitable for extension work on existing houses.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a central cleaner for a private room, which saves space and can be easily installed in an existing house.

[0008]

In order to achieve the above object, the central cleaner of the present invention has an electric blower installed in a duct provided so as to communicate the inside and outside of the outer wall of a house, and the suction side of the electric blower. A dust collection chamber is installed inside a room, and a hose having a suction nozzle is detachably connected to this dust collection chamber.

As a result, it is possible to provide a central cleaner for a private room which saves space and is easy to install in an existing house.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is characterized in that an electric blower is installed in a duct provided so as to communicate the inside and outside of the outer wall of a house, and the dust collection chamber is provided on the indoor side, which is the suction side of the electric blower. By installing a central cleaner that detachably connects a hose with a suction nozzle to this dust collection chamber,
It is possible to provide a central cleaner for private rooms that saves space and is easy to install in an existing house.

According to the second aspect of the present invention, by using the electric blower of the axial flow type as the central cleaner of the first aspect, a further space-saving construction can be realized.

The invention according to claim 3 is the central cleaner according to claim 1 or 2 in which a dust collecting portion is provided on the outside of the electric blower on the exhaust side, whereby pressure loss can be reduced and low noise can be achieved. Can improve the suction ability.

According to the invention described in claim 4, the noise reduction can be realized by using the central cleaner according to any one of claims 1 to 3 in which the electric blower is vibration-proof supported with respect to the duct.

The invention according to claim 5 is the central cleaner according to any one of claims 1 to 4, in which the electric blower is vibration-isolated and supported on the outer wall, whereby the vibration isolation effect is further improved. Low noise can be realized.

According to a sixth aspect of the present invention, the electric blower is capable of rotating in the forward and reverse directions. At the time of the forward rotation, air is sucked from the suction nozzle through the dust collecting chamber, and at the time of reverse rotation, the outside air is supplied to the room through the filter. Alternatively, since the central cleaner described in 2 is used, outside air can be taken into the room in addition to dust collection.

According to a seventh aspect of the present invention, the central cleaner according to any one of the first to sixth aspects, wherein a muffling means is provided on the outside of the electric blower on the exhaust side to muffle the exhaust. As a result, the silencing effect can be obtained.

The invention according to claim 8 is the central according to any one of claims 1 to 6, wherein at least one slit-shaped bulge is provided in the middle of the path of the air sucked from the suction nozzle by the electric blower. By using the cleaner, the silencing effect due to the slit-shaped bulging portion can be obtained.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) A central cleaner according to Embodiment 1 of the present invention will be described with reference to FIGS.

In FIG. 1, reference numeral 20 denotes an electric fan of centrifugal fan type, which has an intake port 20a inside a duct 21 provided inside and outside of an outer wall 25 of a housing such as a housing complex.
It is set as 3. Reference numeral 26 denotes a vibration-proof rubber for supporting the electric blower 20 inside the duct 21 in a vibration-proof manner.
Has a ring shape, the inner peripheral hole 26b is press-fitted and fixed to the housing portion 42f of the electric blower 20, and the outer peripheral portion 2
6c is press-fitted and fixed to the inner peripheral side 21a of the duct 21.
Further, a plurality of cutouts are provided on the outer periphery of the anti-vibration rubber 26 to form an exhaust communication hole 26a.

A vibration-proof seal 27, which also functions as a vibration-proof rubber and is made of a ring-shaped rubber material, is attached around the intake port 20a of the electric blower 20 and between the inner peripheral side 21a of the duct 21 and the electric blower. 20 air intakes are sealed.

With the above-described vibration-proof construction, the vicinity of the rotary shaft of the electric blower 20 can be supported, flexible support can be provided against vibration in the rotational direction, and the diameter of the vibration-proof rubber 26 and the vibration-proof seal 27 can be increased. Since the thickness in the direction, that is, the distance between the mounting side of the electric blower 20 and the mounting side of the duct 21 can be increased, flexible support is possible in the radial direction as well, and a vibration damping effect against vibrations in all directions is possible. Can be good.

As shown in detail in FIGS. 1 and 5, a cyclone type dust collecting chamber 28 is installed on the indoor side 23 of the duct 21, which is the suction side of the electric blower 20. Further, on the indoor surface 25a of the outer wall 25 provided with the duct 21,
An indoor board 35 having a communication pipe 34 communicating with the duct 21 at the center is fixed. The dust collection chamber 28 has a removable lid 2.
8a is a circular and transparent outer peripheral surface 28
An outer peripheral groove 28b is formed in e and at the same time a connecting pipe 29 is attached in a tangential direction, and a communication pipe 34 is provided at the center of the end face 28c.
Intake cylinder 28 that is attached so as to be detachable and rotatable around the
d is provided.

As shown in FIGS. 3 and 4, a connecting portion 33 is provided at the end of the connecting pipe 29 so that the hose mounting portion 32a of the hose 32 communicating with the suction nozzle 30 and the extension pipe 31 can be freely mounted. Is provided. Since the dust collecting chamber 28 is rotatable as will be described later, as shown in the figure, the connecting portion 33 can be rotated to a free position to be connected to the hose attaching portion 32a.

The attachment of the dust collecting chamber 28 will be described with reference to FIGS. 5 to 7. The suction pipe 28d of the dust collecting chamber 28 is inserted and fitted into the outer periphery of the communication pipe 34 of the indoor substrate 35, and the indoor substrate 3
By fitting the flange portion 36a of the locking tool 36 attached to 5 to the outer peripheral groove 28b of the dust collecting chamber 28 from above and fixing the locking tool 36 to the indoor substrate 35 with the screw 35b, the dust collecting chamber 2
8 is rotatably attached to the indoor substrate 35.

Next, the fine dust collecting portion 37 provided on the outside surface of the electric blower 20 on the exhaust side will be described with reference to FIGS. The fine dust collecting portion 37 includes an outdoor substrate 37a having a communication hole 37d connected to the end of the duct 21 and fixed to the outdoor surface 25b of the outer wall 25, a case 37e having a plurality of exhaust ports 37b, and an exhaust port. It is composed of a fine filter 37c facing the side 37b and installed inside the case 37e. FIG. 2 shows the configuration of the fine dust collecting portion 37 viewed from the exhaust port 37b side.

Next, FIGS. 8 and 9 show details of the electric blower 20.

As shown in the figure, 40 is a plurality of blades 40a, 40b fixed to an output shaft 42e of an electric motor 42.
Is a mixed flow centrifugal fan having a plurality of diffusers, and stationary blades 44 are installed around the centrifugal fan. Four
Reference numeral 5 denotes a fan case, which encloses the vanes 44 and the centrifugal fan 40 and forms an air passage 46 between the fan case and the frame 42a of the electric motor 42. The electric motor 42 is composed of a stator 42b having windings, a rotor 42d supported by a bearing 42c and having a magnet arranged on the surface thereof, and a frame 42a containing these. In the frame 42a,
There is no ventilation hole and it has a fully closed structure. Electric motor 42
Is a permanent magnet type brushless motor. Arrow 48
Indicates the flow of air flow.

Next, the operation of the central cleaner in this embodiment will be described.

An extension pipe 31 to which a suction nozzle 30 is attached,
When the hose 32 is attached to the connecting portion 33 and the electric blower 20 is driven, the airflow flows in from the suction nozzle 30, passes through the electric blower 20, and flows to the exhaust port 37b.
This makes it possible to collect dust by suction inside the room. The air stream containing the sucked dust flows through the connecting pipe 29 into the dust collecting chamber 28 in the tangential direction as shown by the arrow 48 (FIG. 1B), and rotates at high speed along the inner wall of the dust collecting chamber 28. To do. At this time, a large centrifugal force acts on the dust, and the dust is separated and accumulated on the outside, and only the air flow passes through the central intake cylinder 28 d and the communication pipe 34, and the electric blower 20.
Is sucked into the intake port 20a. Although the airflow flowing into the electric blower 20 contains a small amount of fine dust, the centrifugal fan 4
The blades 40a and 40b of No. 0 are not so large as to damage the blades 40a and 40b, but pass through the ventilation passage 46, and the fine dust collecting portion 37 on the outdoor side 24
When passing through the fine filter 37c, the fine dust is separated, and the air flow containing almost no dust is exhausted from the exhaust port 37b.

In the present embodiment, the electric motor 42 of the electric blower 20
Since it has a fully closed structure, the air flow flows outside the electric motor 42 and does not pass through the inside, so there is a risk of damaging the rotating parts such as the bearing 42c, the rotor 42d, the conducting parts such as the stator 42b. There is no. Since the fine dust collecting portion 37 is installed outdoors, its surface area can be made sufficiently large, and increase in pressure loss does not pose a problem in actual use even if the maintenance frequency is reduced. As shown in FIGS. 6 and 7, the dust accumulated in the dust collection chamber 28 can be removed by removing the entire dust collection chamber 28 from the indoor substrate 35 and opening the lid 28a.

Since the dust collecting chamber 28 is rotatable, the hose 32
It is possible to arrange the connecting portion 33 with and at any position at the rotation position, and to arrange the connecting portion 33 at a convenient position according to the form of the room to be attached.

Further, since the exhaust air is exhausted to the outside of the room without the fine dust collecting portion 37, there is no problem in practical use even if some fine dust is mixed with the exhaust air.

The case 37e of the fine dust collecting portion 37 can be removed from the outdoor substrate 37a, and the fine filter 37c can be maintained.

According to the above construction, long pipes are not required and the exhaust air is exhausted to the outside of the room, so that it is not necessary to provide a fine filter on the intake side or the indoor side. Further, since the fine filter 37c can be provided outdoors, the area can be made sufficiently large, the pressure loss can be made small, and the electric blower having a small capacity can perform practically sufficient cleaning.

In this embodiment, since the electric blower is arranged in the duct 21 having an inner diameter of about 100 mm, 6000
A high-speed, small-diameter electric blower that rotates at 0 r / min or more is used.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. Since the configuration of the central cleaner as a whole is the same as that of the first embodiment, the difference will be mainly described.

As described in the first embodiment, the electric blower does not require piping as compared with the conventional central cleaner, and a structure with a small pressure loss can be realized. Therefore, an electric blower with a relatively small generated pressure can be used. Is.

Therefore, the axial flow type electric blower 54 as shown in the figure is used. This is because the electric motor 55 has a stator 55b in which windings are installed, and a rotor 55d in which a magnet is arranged and fixed to an output shaft 55e supported by a bearing 55c.
It is composed of a frame 55a containing these.
The frame 55a has no ventilation hole and has a fully closed structure. The model of the electric motor 55 is a permanent magnet type brushless motor. The output shaft 55e of the electric motor 55 has a stationary blade 56 and a moving blade 57 having a plurality of blades. Static wings 5
6 is arranged on the downstream side of the moving blade 57 to recover the pressure of the air flow generated in the moving blade 57. In this embodiment, the stationary blade 5
There are two sets of 6 and moving blades 57, respectively, and constitute a two-stage axial flow type electric blower 54. The electric motor 55, the moving blades 57, and the stationary blades 56 are contained in a fan case 58 having an intake port 58a and an exhaust port 58b.

As in the case of the first embodiment, the arrow 48 indicates the flow of the air flow, and dust collection and dust removal are performed.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. Since the configuration of the central cleaner as a whole is the same as that of the first and second embodiments, the difference will be mainly described.

In this embodiment, the performance of the vibration proof support of the electric blower is further improved. Reference numeral 50 denotes a disc-shaped indoor support substrate fixed to the indoor side wall surface of the outer wall 25, and has a cylindrical support collar portion 50a. Reference numeral 51 is an outdoor support substrate having a similar shape configuration and fixed to the outdoor wall surface, and similarly having a support flange portion 51a. An outer cylinder 52 also serves as a fan case 58 of the electric blower 54, and its outer diameter is slightly smaller than the inner diameter of the duct 21.

That is, when the outer cylinder 52 incorporating the electric blower 54 is installed in the duct 21, the outer cylinder 52 has a gap 49 of 2 to 3 mm in the outer peripheral portion thereof. Reference numeral 53 is a ring-shaped anti-vibration rubber, which is inserted into and attached to both ends of the outer cylinder 52. Each of them has a support flange portion 52a at an end of the outer cylinder 52.
And the support flange portions 50a of the indoor support substrate 51 and between the support flange portions 51a of the outdoor support substrate 51, respectively. The dust collecting chamber (not shown) is attached by being fixed to the indoor supporting substrate 50 as in the above-described embodiment.

With the above-mentioned structure, the outer diameter of the vibration-proof rubber 53 can be made sufficiently large, and a flexible and accurate supporting structure can be realized. Further, the anti-vibration rubber 53 does not interfere with the ventilation path of the electric blower 54, and a structure with a small pressure loss can be realized. This configuration is particularly effective when the axial flow type electric blower 54 having a large entrance diameter is used.

It is also possible to limit the indoor dust collecting chamber to the separation of coarse dust and to carry out the main dust separation in the fine dust collecting portion on the outdoor side.

(Fourth Embodiment) A central cleaner according to a fourth embodiment of the present invention will be described with reference to FIGS. 13 and 14.
Since the basic configuration is almost the same as that of the first embodiment, only the differences will be described.

In this embodiment, the electric blower 20 is built in the duct 21 of the outer wall 25, and the dust collecting paper bag 61 is provided on the indoor side 23.
A dust collection chamber 60 that encloses the above is installed, and a muffling box 62 that is a muffling means for muffling the exhaust is installed on the outdoor side 24.
The dust collection chamber 60 is attached to an attachment substrate 64 fixed to the inside of the outer wall 25. The dust collection chamber 60 has a lid 60a
Is attached and detached so that the dust-collecting paper bag 61 can be freely taken out. A hose connecting portion 63 is installed below the dust collecting chamber 60, and the hose 32 communicating with the suction nozzle 30 is connected thereto.

A connection hole 62a is provided in the lower part of the sound deadening box 62, and the internal space is provided with the duct 2 through the connection hole 62a.
It communicates with 1. An exhaust long hole 62b is installed at a position diagonal to the connection hole 62a, and a sound absorbing material 62d is attached to a wall surface of an air passage 62c between the connection hole 62a and the exhaust long hole 62b to form an expansion type sound absorbing duct silencer. Is done. The exhaust long hole 62b is equipped with a louver 62e that prevents raindrops and the like from entering the exhaust long hole 62b.

Here, the dust collected by suction and sucked is separated by the dust-collecting paper bag 61, the dust is accumulated in the dust-collecting paper bag 61, and only the air passes through the electric blower 20 and the exhaust long hole of the muffler box 62. Exhaust from 62b. Since the muffler box 62 is installed outdoors, a muffler box having a sufficient volume can be installed, and exhaust noise of the electric blower 20 is sufficiently muffled by the muffler box 62, so that low noise operation can be realized. Since the hose 32 and the extension pipe 31 are sufficiently long on the indoor side 23, the noise of the electric blower 20 is sufficiently suppressed before reaching the suction nozzle 30.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIG. Since the basic configuration is almost the same as that of the first embodiment, only the differences will be described.

As shown in the figure, at least one slit-shaped bulging portion 70 is provided in the middle of the path of the air sucked from the suction nozzle by the electric blower 54 to serve as a silencer. In this embodiment, slit-shaped expansion parts 70 are provided at both ends of the electric blower 54 or both ends of the duct 21,
The narrow band noise having a constant frequency such as the wind noise caused by the blades of the electric blower 54 can also be easily realized from the configuration. As shown in FIG. 16, a slit groove 53a serving as a slit-shaped bulging portion 70 is provided on the inner circumference of the vibration-proof rubber 53, and a plurality of opening holes are provided in the fan case portion of the electric blower 54, that is, the outer cylinder 52 portion, which is opposed. By providing 52a, it is possible to obtain the same silencing effect as above.

(Sixth Embodiment) A central cleaner according to a sixth embodiment of the present invention will be described with reference to FIG. Since the basic configuration is almost the same as that of the first embodiment, only the differences will be described.

As shown in the figure, the axial flow type electric blower 80 built in the duct 21 of the outer wall 25 can be rotated forward and backward,
During normal rotation, air can be sucked from the suction nozzle through the dust collection chamber 82, and during reverse rotation, outside air can be supplied to the room through the intake filter 92. Indoor side wall surface 25
In a, an indoor exhaust part 81 composed of an indoor filter exhaust port 88 and an exhaust filter 91, and a dust collecting chamber 82 containing a dust collecting paper bag 83 are provided through the indoor side switching valve 85 and the duct 2.
It is attached so as to communicate with 1. That is, the duct 21 communicates with the dust collection chamber 82 or the indoor exhaust part 81 depending on the position of the indoor side switching valve 85.

The outdoor side 24 has an outdoor filter intake port 89,
An outdoor intake portion 84 including an intake filter 92 that covers the upper exhaust port 87 and the outdoor filter intake port 89 is installed. The upper exhaust port 87 is opened and closed by an outdoor switching valve 86.

In a normal cleaning operation, an extension pipe / hose communicating with the suction nozzle is connected to the connecting portion 33 of the dust collecting chamber 82,
The electric blower 80 is rotated in the normal direction, and the indoor switching valve 85 is switched so that the dust collection chamber 82 and the electric blower 80 communicate with each other as shown in FIG. 17B, and the outdoor switching valve 86 opens the upper exhaust port 87. When switched to, the sucked dust is separated and accumulated in the dust collecting paper bag 83, and the exhaust gas passing through the electric blower 80 has an upper exhaust port 87 with a small pressure loss of the outdoor intake unit 84.
Exhausted from.

In the intake / ventilation operation, the electric blower 80 is reversed to change the flow of air from the outdoor side 24 to the indoor side 23, and the indoor switching valve 85 is switched so that the indoor filter exhaust port 88 and the electric blower 80 communicate with each other. The outdoor side 24 switches the outdoor side switching valve 86 to the side that closes the upper exhaust port 87 (FIG. 17A). The air flow on the outdoor side 24 passes through the intake filter 92, is purified, passes through the electric blower 80, passes through the exhaust filter 91 on the indoor side, is further purified, and is exhausted into the room. The arrow 90 indicates the flow of air flow.

The air that has been purified by the filters 91 and 92 and has flowed into the indoor side 23 is exhausted from the gaps between the indoor doors and windows. That is, the atmospheric pressure in the room is slightly higher than that in the atmosphere, and the polluted air does not enter the room through a gap or the like, and the room is always kept clean.

At the time of suction / ventilation, the pressure loss of the filters 91, 92 is smaller than that of the hose / extension pipe and the suction nozzle, and the operation can be performed with a smaller output than that at the time of cleaning, and the power consumption and the noise are small even during the continuous operation.

The structures of the above-described first to sixth embodiments can be combined as appropriate, and are not limited to the structures of the individual embodiments.

[0060]

As described above, according to the central cleaner of the present invention, it is possible to provide a central cleaner for a private room which saves space and is easy to install in an existing house.

[Brief description of drawings]

1A is a sectional view of a central cleaner according to a first embodiment of the present invention, FIG. 1B is a sectional view taken along line AA of FIG.

FIG. 2 is a plan view showing a fine dust collecting portion of the central cleaner.

FIG. 3 is an overall perspective view including a suction nozzle of the central cleaner.

FIG. 4 is an overall perspective view including a suction nozzle when the dust collecting chamber of the central cleaner is rotated.

5A is an enlarged cross-sectional view of the central cleaner, FIG. 5B is a side view showing a vibration isolating rubber of the central cleaner, and FIG. 5C is a vibration isolation seal of the central cleaner.
BB front view

FIG. 6A is an enlarged cross-sectional view of the central cleaner with the dust collecting chamber removed, and FIG. 6B is an exploded cross-sectional view of the dust collecting chamber of the central cleaner.

FIG. 7 is an exploded front view showing an indoor board and a locking tool of the central cleaner.

FIG. 8 is a sectional view showing an electric blower of the central cleaner.

FIG. 9 is a perspective view showing a centrifugal fan of the electric blower.

FIG. 10 is a sectional view showing an electric blower for a central cleaner according to a second embodiment of the present invention.

FIG. 11 is a perspective view of the electric blower.

FIG. 12 (a) is a front sectional view showing the vibration isolating structure of the central cleaner according to the third embodiment of the present invention. FIG. 12 (b) is a side view of the vibration isolating structure.

13A is a front sectional view of a central cleaner according to a fourth embodiment of the present invention, FIG. 13B is a side view showing a sound deadening box portion of the central cleaner, and FIG. 13C is a side view showing a dust collection chamber portion of the central cleaner.

FIG. 14 is an overall configuration diagram including a suction nozzle in a state where the lid of the dust collecting box of the central cleaner is removed.

FIG. 15 (a) is a cross-sectional view showing a sound deadening structure of a central cleaner according to a fifth embodiment of the present invention. (B) A-A cross-sectional view of FIG. 15 (a).

FIG. 16 is a sectional view showing another silencing configuration of the central cleaner.

FIG. 17A is a front sectional view of the central cleaner during a ventilation operation according to the sixth embodiment of the present invention. FIG. 17B is a front sectional view of the central cleaner during cleaning.

FIG. 18 is an overall perspective view showing the configuration of a conventional central cleaner.

FIG. 19 is a sectional view showing the conventional central cleaner body.

[Explanation of symbols]

20, 54, 80 Electric blower 25 outer wall 21 duct 28, 60, 82 Dust collection chamber 30 suction nozzle 31 extension pipe 32 hose 26, 53 Anti-vibration rubber 27 Anti-vibration seal 25a, 25b wall surface 37 Fine dust collecting part 49 gap 52 outer cylinder 53a slit groove 70 Slit-shaped expansion part 85 Indoor switching valve 86 Outdoor switching valve 91 Exhaust filter 92 Intake filter

Claims (8)

[Claims] 1. An electric blower is installed in a duct provided to communicate the inside and outside of an outer wall of a house, and a dust collection chamber is installed on the indoor side, which is the suction side of the electric blower, and a suction nozzle is provided in this dust collection chamber. Central cleaner that detachably connects a hose with 2. The central cleaner according to claim 1, wherein the electric blower is an axial flow type. 3. The central cleaner according to claim 1, wherein a dust collecting portion is provided on the outside of the electric blower on the exhaust side. 4. The central cleaner according to claim 1, wherein the electric blower is vibration-damped to the duct. 5. The central cleaner according to any one of claims 1 to 4, wherein the electric blower is vibration-isolatedly supported on the outer wall. 6. The central cleaner according to claim 1, wherein the electric blower is capable of rotating in the forward and reverse directions, sucking air from the suction nozzle through the dust collecting chamber during normal rotation and supplying outside air through the filter during reverse rotation. . 7. The outdoor side, which is the exhaust side of the electric blower,
7. A muffling means is provided to muffle the exhaust gas.
The central cleaner according to any one of 1. 8. The central cleaner according to claim 1, wherein at least one slit-shaped bulging portion is provided in the path of the air sucked from the suction nozzle by the electric blower.