JPH08219095A - Vacuum cleaner and built-in motor-driven blower - Google Patents

Abstract

PURPOSE: To reduce noise and ventilation loss in a vacuum cleaner body and downsize the vacuum cleaner body without lowering the efficiency of a motor- driven blower by providing an air current guide on the periphery of a suction port at the upper face part of a fan casing. CONSTITUTION: A motor-driven blower is provided with an approximately cylindrical air current guide 110 at the periphery of a suction port 109. This air current guide 110 is so constituted as to form circular arc shape cross section protruding onto the dust collecting side. The distance L between a motor protecting guard 525 and a motor-driven blower is set to be narrow, but since the approximately cylindrical air current guide of circular arc shape cross section is provided at the periphery of the suction port 109, air having passed a dust collecting bag, an auxiliary filter 511 and the motor protecting guard 525 can be smoothly guided. The air discharged from a dust collecting chamber can thereby be guided smoothly to the suction port 109 of the motor-driven blower, and a separating phenomenon generated by a steep compression gradient state is reduced so as to be able to improve the efficiency of the motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electric vacuum cleaner and an electric blower incorporated therein.

[0002]

2. Description of the Related Art An electric blower built into a conventional electric vacuum cleaner is provided with an electric blower on a fan casing side and a housing side of the electric blower via a vibration-proof material for absorbing vibration during operation of the electric blower. It was built inside the vacuum cleaner. One end of the vibration isolator on the fan casing side is fixed so as to abut against a rib provided inside the cleaner body,
The other end was fixed to the fan casing with an adhesive or the like.
Therefore, the vibration isolator on the fan casing side tries to move to the intake side due to the vibration caused by the operation of the electric blower and the pressure difference between the intake port and the exhaust port, and is sandwiched between the ribs provided inside the cleaner body. As a result, the vibration isolator loses elasticity due to compressive deformation, and the vibration of the electric blower cannot be sufficiently absorbed.

Therefore, as described in Japanese Patent Laid-Open No. 63-168143, one end of the vibration isolator on the fan casing side is located at the portion of the cleaner body far from the center of the electric blower, and the other end is located at the center of the electric blower. There is disclosed a technique in which an inner peripheral surface of the other end peripheral edge is formed in an arc shape while being fixed by abutting on the peripheral edge of the intake port of a nearby fan casing.

[0004]

However, in the technique described in the above-mentioned Japanese Patent Laid-Open No. 63-168143, the inner diameter surface of the vibration isolator, which comes into pressure contact with the inner diameter surface of the intake port, is formed into an arc shape and flows in. Although a technique for preventing turbulent air flow has been disclosed, no consideration has been given to the point of smoothly guiding the air discharged from the dust collection chamber of the cleaner body to the intake port of the electric blower.

In recent electric vacuum cleaners, the gap between the intake port of the electric blower and the electric motor protection guard tends to be reduced to 40 mm or less along with the downsizing of the main body of the vacuum cleaner. The dust-containing air introduced from the suction port, the extension pipe, the hose enters the dust collecting chamber of the cleaner body, and the dust-containing air expands in the dust collecting chamber as the flow passage area increases, thus increasing the flow velocity. It is dropped and separated into dust and air by a dust collection filter.

Then, this air passes through the auxiliary filter and the electric motor protection guard, and is sucked into the electric blower while being rapidly compressed again in the electric motor front chamber. In this process, if the distance between the intake port in front of the electric blower and the motor protection guard, i.e., the motor front chamber, is narrow, it will be compressed rapidly and the compression gradient will become steep, causing stagnation and separation of the air flow, and It caused road resistance, the efficiency of the electric blower was poor, and noise was generated.

Therefore, the technique disclosed in the above-mentioned Japanese Patent Laid-Open No. 63-168143 has a problem that the stagnation of the air flow and the phenomenon of separation occur, and the cleaner body cannot be downsized.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an electric vacuum cleaner in which the efficiency of the electric blower is improved and the size of the cleaner main body is reduced, and an electric blower incorporated therein.

[0009]

In order to achieve the above object, the present invention is characterized in that a rotor, an end bracket arranged on the upper part of the rotor, and an end bracket arranged on the upper part of the end bracket. A diffuser to be installed, a centrifugal impeller arranged above the diffuser and connected to the rotary shaft of the rotor, and a circular suction on the upper surface of the centrifugal impeller An electric blower having a fan casing having a mouth, wherein an airflow guide is provided on the outer periphery of the suction opening on the upper surface of the fan casing.

The present invention is also characterized by an electric blower equipped with a fan casing having a suction port, a dust collecting portion for collecting dust by a suction airflow generated by the operation of the electric blower, and the electric motor. An electric vacuum cleaner having a blower and a cleaner body containing the dust collecting section, wherein a space is formed between an exhaust side of the dust collecting section and an intake side of the electric blower, and the collecting section is provided in the space. The airflow guide is inclined from the exhaust side of the dust part toward the intake port of the electric blower.

[0011]

According to the present invention, by providing an airflow guide for the flow in the front of the electric blower, the ventilation loss and noise inside the main body can be reduced, and the cleaner main body can be made compact without lowering the efficiency of the electric blower. Can be converted.

[0012]

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

FIG. 4 is a perspective view showing the appearance of the vacuum cleaner according to the embodiment of the present invention.

In the figure, 401 is a cleaner body having a control circuit, an electric blower and the like built therein, and 402 is a cleaner body 4.
01 is a hose connected to the suction port, 403 is a hose handle, 404 is a tip of the hose 402 (hose handle 40
3) an extension pipe, 405 a suction port connected to the extension pipe 404, 406 a switch operation unit provided in the hose proximal portion 403, 407 a first infrared light emitting portion provided in the hose proximal portion 403 , 408 is a hose base 403
A second infrared light emitting portion 409 provided on the upper surface of the cleaner body 401;
Indicates the ceiling in the room.

FIG. 5 is a vertical sectional view of a cleaner body according to an embodiment of the present invention.

The cleaner body 401 has a lower case 501 that covers the lower part at its front part, a lid 502 that covers the upper part of the front surface, a suction opening 503 provided on the lid 502, and dust that has been sucked in through the suction opening 503. A dust collecting chamber 505 accommodating a dust collecting bag 504 for dusting, a packing 506 provided for maintaining airtightness inside the dust collecting chamber 505, and a clamp 507 for opening and closing the lid 502, and at the rear portion thereof. An electric blower chamber 509 formed by a lower case 501 and an upper case 508 is provided, and an electric blower 510 is housed therein.

An auxiliary filter 511 is provided on the intake side of the electric blower 510 to communicate with the dust collecting chamber 505.

A board housing 513 covered with an upper case cover 512 is formed on the upper case 508, and a control circuit board 514 and a display board 515 are housed therein. On the display substrate 515, an infrared light receiving element 516 that receives an infrared signal emitted from the first infrared light emitting portion 407 and the second infrared light emitting portion 408 of the hose hand portion 403, and an LED lamp 517 that displays an operating state. It is provided. An infrared light receiving portion 409 formed of another material that transmits infrared light is provided on the upper case cover 412 so that an infrared signal reaches the infrared light receiving element 516.
The infrared light receiving section 409 may be formed integrally with the upper case cover 512 using a material that transmits infrared rays.

The control circuit board 514 and the display board 51 are also provided.
5 is electrically connected by a lead wire 531.

The electric blower 510 is supported by a front anti-vibration rubber 518 and a rear anti-vibration rubber 519 that absorb vibrations during operation of the electric blower, and heat generated during the operation of the electric blower 510 is stored in the substrate housing portion 513. A heat insulating and sound deadening material 520 that suppresses the influence and a sound deadening cover 521 that has air permeability for sound deadening and flameproofing of the electric blower 510 are provided.

Exhaust air from the electric blower 510 is exhausted to the outside of the cleaner body through the exhaust filter 522 and the exhaust port 523 provided at the rear portion of the cleaner body 401.

An electric motor front chamber 524 is provided between the dust collecting chamber 505 and the electric blower chamber 509. A grid-shaped electric motor protection guard 525 is provided in front of the electric motor front chamber 524, and the central side end surface of the electric motor protection guard 525 is provided. The power control element 526 and the radiation fin 527 are fixedly arranged.

Further, the cleaner main body 401 has front wheels 528 for movement, rear wheels 529, and auxiliary wheels 530 which come into contact with the surface to be cleaned when the front of the main body 401 of the cleaner is lifted.
Is provided.

Next, the operation of the electric vacuum cleaner according to the present invention will be described with reference to FIGS. 4 and 5.

When the user of the vacuum cleaner presses one of the switch operating units 406 provided on the hose hand portion 403, the signal code according to the pressed switch serves as an infrared signal, and the first infrared emitting unit 407 and the second infrared emitting unit 407. The light is emitted from the infrared light emitting section 408 of. The first infrared emitting section 407 is arranged so as to face substantially vertically upward in a normal use state, and the infrared signal emitted from the first infrared emitting section 407 hits the ceiling 410 or the wall of the room. It is reflected and reaches the infrared light receiving section 409 of the cleaner body 401. Further, the second infrared ray emitting section 408 is arranged at the grip end of the hose proximal portion so as to face downward from substantially horizontal, and the infrared signal emitted from the second infrared ray emitting section 408 is directly cleaned. The infrared light receiving unit 409 of the machine body 401 is reached. The infrared signal arriving at the infrared receiving section 409 is transferred to the infrared receiving element 516.
The light is received by the control circuit board 514 to control the vacuum cleaner.

The vacuum cleaner according to this embodiment has a vacuum cleaner body 4
In order to shorten the overall length of 01 to make it compact, the distance between the dust collecting chamber 505 and the electric blower chamber 509, that is, the electric motor front chamber 52.
The width of 4 is narrow. Therefore, the auxiliary filter 5
11. The air that has passed through the electric motor protection guard 525 is rapidly compressed at the suction port of the electric blower 510, so that the compression gradient becomes steep and the flow resistance due to flow stagnation or separation phenomenon causes flow path resistance, resulting in poor efficiency of the electric blower 510. It was A means for solving this will be described with reference to FIGS.

FIG. 1 is a sectional view of an electric blower 510 according to an embodiment of the present invention, FIG. 2 is an external perspective view of the electric blower 510 according to an embodiment of the present invention, and FIG. 3 is an electric blower 51 of FIG.
It is a cross-sectional view of the main part of No.

The electric blower 510 has a rotor 101 built in substantially in the center, a housing 102 on the outside and an end bracket 103 on the top. A diffuser 104 is provided on the end bracket 103, and a centrifugal impeller 105 is provided above the diffuser 104 to rotate the rotary shaft 106 of the rotor 101.
It is fixed integrally by a nut 107.

Reference numeral 108 denotes a fan casing which covers the diffuser 104 and the centrifugal impeller 105 and is fixed to the end bracket 103. Also the fan casing
A suction port 109 for taking in air is provided on the upper surface of 108.

The electric blower 510 of this embodiment has a suction port 1
A substantially cylindrical airflow guide 110 is provided on the outer periphery of 09.
As shown in FIG. 3, the airflow guide 110 includes a dust collecting unit 50.
It is characterized in that it is configured so as to form an arcuate cross section discharged to the 5 side.

As shown in FIG. 6, the dust-containing air generated by the electric blower 510 causes the dust-containing air to flow into the dust-collecting bag 504.
Is sucked in through the opening 601 and the dust is filtered by the dust collecting bag 504. The air that has passed through the dust collecting bag 504 passes through the auxiliary filter 511, the electric motor protection guard 525, and is guided to the suction port 109 from the electric motor front chamber 524.

The dust-containing air sucked from the opening 601 of the dust collecting bag 504 collects the dust in the dust collecting bag 504, so that the volume of the dust collecting chamber 505 is made larger than that of the other flow passages. Increases dust efficiency. Further, if the volume of the dust collecting chamber 505 is made larger than that of the other flow passages, the ventilation resistance can be reduced. Since the volume of the dust collection chamber 505 is larger than that of the other flow passages, the dust collection chamber 505 expands and the flow velocity of air decreases. Then, the air whose flow velocity has dropped drops from the dust bag 504 to the auxiliary filter 51.
1, the electric motor protection guard 525, and the electric motor front chamber 524 are guided, but are compressed again at the suction port 109 to increase the flow velocity.

In the process of repeating the expansion and compression, it is necessary to convert the volume of the air passage from large to small without loss. For that purpose, it is necessary to secure a certain volume or more of the electric motor front chamber 524 so that the flow velocity changes reasonably. Therefore, the suction port 109 of the conventional electric blower 510 and the electric motor protection guard 5 are required.
The distance from 25 was required to be at least 40 mm or more.

However, due to the market demand for improved operability due to the downsizing of the main body of recent electric vacuum cleaners, it becomes impossible to secure a space of 40 mm or more between the suction port 109 of the electric blower 510 and the electric motor protection guard 525, which causes a loss. The increase has become a big problem under the recent market environment of intensifying suction performance competition.

In the present embodiment, the distance L between the electric motor protection guard 525 and the electric blower 510 is set as small as L≤30 mm, but the air flow guide 110 having a substantially cylindrical shape and an arc cross section is provided around the outer circumference of the suction port 109. Since it is provided, the dust collecting bag 504, the auxiliary filter 511, the motor protection guard 5
The air passing through 25 can be smoothly guided.

FIG. 7 shows the relationship between the aperture ratio and the body efficiency, and FIG.
Shows the relationship between the aperture ratio and noise above 1 kHz. Here, the opening ratio indicates (the radius of curvature R of the cross section of the airflow guide 110) / (the inner diameter of the suction port 109) × 100 (%).

According to FIG. 7, when the opening ratio is gradually increased from 2%, the body efficiency is also increased accordingly, and the body efficiency is maximized at the opening ratio of 10%. After that, the efficiency of the main body gradually begins to decrease. According to this experiment, it was confirmed that the main body efficiency was improved in the range of 0.7% to 1.0%.

Further, according to FIG. 8, when the aperture ratio is gradually increased from 2%, the noise is also increased accordingly, and the noise is minimized when the aperture ratio is 10%. After that, the noise gradually begins to rise. According to this experiment, it was also confirmed that the air flow noise of 2 dB to 3 dB was partially reduced in the frequency region of 1 KHz or higher.

From the experimental results shown in FIGS. 7 and 8, a region having stable characteristics is selected, and the radius of curvature R is set to the suction port 109.
On the fan casing 108, an airflow guide 110 having a hemispherical ring-shaped projection larger than 7% of the inner diameter of the above is formed on the atmosphere side.

The airflow guide 110 may be formed integrally with or separately from the fan casing 108, and may be selected as required. When the airflow guide 110 is configured separately from the fan casing 108, the fan casing 1
08 and another material such as resin.

Further, in this embodiment, as shown in FIG.
Inside the air flow guide 110, a seal 301 made of a flexible resin such as silicon or Teflon, and a seal 3
01 and the airflow guide 110 are filled with a spacer 302 made of a hard resin or the like and fixed by a seal holder 303. Further, the seal retainer 303 is provided with a protrusion 303a in a direction opposite to the centrifugal impeller 105 to prevent the seal 301 from rotating.

According to this embodiment, since the airflow guide 110 having a substantially cylindrical and arcuate cross section is provided on the outer circumference of the suction port 109, the air discharged from the dust collecting chamber 505 is driven by an electric blower. The air can be smoothly guided to the suction port 109 of 510, the separation phenomenon caused by a steep compression gradient can be reduced, the efficiency of the electric blower 510 can be improved, and the generated noise can be reduced.

Further, the main body of the vacuum cleaner can be downsized without lowering the efficiency of the electric blower 510, and an electric vacuum cleaner that is easy to handle can be provided.

Further, since the seal 301 is provided inside the airflow guide 110, the circulating flow generated by the operation of the electric blower can be prevented.

Next, another embodiment according to the present invention will be described with reference to FIG.

In the previous embodiment, the seal 301 and the spacer 3
01 is provided separately, but in this embodiment, only the seal 301 is provided.

The seal 301 may have a multi-layer structure having a hardness gradient from the air flow guide 110 side.

According to this embodiment, in addition to the effects of the previous embodiment, the number of parts can be reduced.

Next, another embodiment according to the present invention will be described with reference to FIG.

The present embodiment is an embodiment in which the airflow guide 110 and the outer periphery of the fan casing 108 are smoothly connected, and the unevenness on the surface of the fan casing 108 is reduced to further reduce the loss due to turbulent flow. In addition,
Whether or not the seal 301 is provided may be selected as necessary.

According to this embodiment, in addition to the effects of the embodiment, there is an effect of reducing the loss of the main body by 0.2%, and the effect of the air flow guide can be further improved.

Next, another embodiment according to the present invention will be described with reference to FIG.

In this embodiment, the airflow guide 110 is integrated with the front vibration isolating rubber 518, and the airflow guide 110 integrated with the front vibration isolating rubber 518 extends to the vicinity of the suction port 109 of the electric blower 510. Let the fan casing 1
It is attached tightly to 08 or through a gap. Then, the front end portion of the front vibration isolating rubber 518 near the suction port 109 is formed in an arc shape.

According to the present embodiment, the efficiency of the electric blower can be improved and the fan casing 108 can be collected without changing the structure of the electric blower, only by changing the vibration proof rubber and adding the air flow guide. It is possible to reduce the noise radiated to the dust chamber 505 side.

Next, another embodiment according to the present invention will be described with reference to FIGS.

In this embodiment, the motor front chamber 524 is shown in FIG.
The airflow guide 1201 as shown in FIG.
The air discharged from the air blower is guided to the suction port 109 of the electric blower along the airflow guide 1201.

Airflow guide 1201 and fan casing 1
The space of 08 is closely attached, and the suction port 10 of the electric blower 510 is
The diameter K2 of 9 and the width K1 of the airflow guide 1201 are K1> K
2 or K1 = K2.

The tip of the airflow guide 1201 in the portion close to the airflow guide 1201 and the suction port 109 of the fan casing 108 has a radius of curvature of 7% or more of the suction port diameter.

Further, instead of the airflow guide 1201 of FIG. 12, a hollow airflow guide 1301 as shown in FIG. 13 is provided, or as shown in FIG. 14, the inclined portion of the airflow guide 1401 is formed in an arc shape. May be.

According to the present embodiment, since the useless space of the motor front chamber 524 is eliminated, a small amount of dust leaking from the filter is accumulated in the dead space for a long period of time so that microorganisms can propagate and decompose. It is possible to prevent a bad smell.

Further, according to this embodiment, since the volume of the vibration-proof rubber is increased, it is possible to reduce the vibration transmission to the main body case and the noise.

Next, another embodiment according to the present invention will be described with reference to FIG.

In this embodiment, a holding portion 1601 integrally formed with the cleaner body is provided, the holding portion 1601 is inclined toward the suction port 109 of the electric blower 510, and the tip of the holding portion 1601 is attached to the fan casing 108. An airflow guide 1602 is provided so as to keep contact and confidentiality with the section. Since most of the effects are determined by the structure of the holding portion 1601, it is necessary to optimize the flow path so that the flow path structure is gradually reduced. Further, considering impact, drop, vibration noise, etc., it is necessary to provide an air flow guide 1602 at the tip with a radius of curvature R which is 7% of the diameter of the suction port 109, made of an interfering material such as rubber or soft vinyl chloride.

According to the present embodiment, it is possible to reduce the cost of the airflow guide 1602, suppress the generation of noise, and provide an electric vacuum cleaner that is resistant to shocks and drops.

Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, the motor protection guard 1701
The angle of the plurality of ribs of the grid is deflected toward the suction port 109 of the electric blower 510 so that the air can smoothly flow into the suction port 109 of the electric blower 510.

According to this embodiment, the motor protection guard 17
Since the angle of the rib of the grid of 01 is deflected toward the suction port 109 of the electric blower 510, the flow of air becomes smooth, the efficiency of the electric blower is improved, and the noise of the electric blower is reduced. You can

Further, as shown in FIG. 18, the embodiment of FIG. 16 and the embodiment of FIG. 17 may be combined.

[0069]

As described above, according to the present invention, by providing the air flow guide for the flow in the front of the electric blower, the ventilation loss and noise inside the main body can be reduced, and further the efficiency of the electric blower is reduced. It is possible to reduce the size of the vacuum cleaner body without using it.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an electric blower according to an embodiment of the present invention.

FIG. 2 is a perspective view of an electric blower according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts of an electric blower according to an embodiment of the present invention.

FIG. 4 is a perspective view of the appearance of the electric vacuum cleaner according to the embodiment of the present invention.

FIG. 5 is a sectional view of a cleaner body according to an embodiment of the present invention.

FIG. 6 is a diagram showing a relationship between a dust collecting unit and an electric blower according to an embodiment of the present invention.

FIG. 7 is a diagram showing main body efficiency and aperture ratio.

FIG. 8 is a diagram showing noise and an aperture ratio.

FIG. 9 is a diagram showing a cross-sectional view of a main part of an electric blower according to an embodiment of the present invention.

FIG. 10 is a sectional view of an electric blower showing another embodiment of the present invention.

FIG. 11 is a diagram showing a relationship between a dust collecting unit and an electric blower according to another embodiment of the present invention.

FIG. 12 is a diagram showing a relationship between a dust collecting unit and an electric blower according to another embodiment of the present invention.

FIG. 13 is a diagram showing a relationship between a dust collecting unit and an electric blower according to another embodiment of the present invention.

FIG. 14 is a diagram showing a relationship between a dust collecting unit and an electric blower according to another embodiment of the present invention.

FIG. 15 is an airflow guide 110 showing another embodiment of the present invention.
It is a perspective view of.

FIG. 16 is a diagram showing a relationship between a dust collecting portion and an electric blower according to another embodiment of the present invention.

FIG. 17 is a diagram showing a relationship between a dust collecting unit and an electric blower according to another embodiment of the present invention.

FIG. 18 is a diagram showing a relationship between a dust collecting portion and an electric blower according to another embodiment of the present invention.

[Explanation of symbols]

108 ... Fan casing, 109 ... Suction port, 110,
1201, 1301, 1401 ... Airflow guide, 301 ...
Seal, 302 ... Spacer, 401 ... Vacuum cleaner body, 50
5 ... Dust collection chamber, 510 ... Electric blower, 524 ... Electric motor front chamber, 525 ... Electric motor protection guard, 518 ... Front side anti-vibration rubber.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisanori Toyoshima 1-1-1 Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Electric Co., Ltd. Electric Appliances Division Taga Headquarters

Claims (13)

[Claims] 1. A rotor, an end bracket arranged on the upper part of the rotor, a diffuser arranged on the upper part of the end bracket, and a rotor arranged on the upper part of the diffuser. An electric blower having a centrifugal impeller connected to a rotating shaft, and a fan casing disposed on an upper portion of the centrifugal impeller and having a circular suction port on an upper surface portion, the fan casing having an upper surface portion. An electric blower characterized in that an airflow guide is provided on the outer circumference of the suction port. 2. The electric blower according to claim 1, wherein the airflow guide has an arc-shaped cross section. 3. The electric blower according to claim 2, wherein an arc-shaped radius of curvature of the airflow guide is 7% or more of an inner diameter of the suction port. 4. The electric blower according to any one of claims 2 to 3, wherein a sealing material is disposed inside the arcuate shape of the airflow guide. 5. The electric blower according to claim 4, wherein a seal retainer for retaining the seal material is provided in a fan casing. 6. An electric blower equipped with a fan casing having a suction port, a dust collecting portion for collecting dust by a suction air flow generated by the operation of the electric blower, the electric blower and the dust collecting portion An electric vacuum cleaner having a cleaner body, comprising: a vibration isolator provided on the fan casing for fixing the electric blower to the cleaner body and absorbing vibration of the electric blower, The vacuum cleaner is characterized in that the vibrating material is extended to the vicinity of the suction port of the fan casing, and a tip portion of the vibration isolating material in the vicinity of the suction port is formed in an arc shape. 7. An electric blower equipped with a fan casing having a suction port, a dust collecting section for collecting dust by a suction airflow generated by the operation of the electric blower, and the electric blower and the dust collecting section are built-in. An electric vacuum cleaner having a cleaner body, wherein a space is formed between an exhaust side of the dust collecting section and an intake side of the electric blower, and the electric blower is provided in the space from the exhaust side of the dust collecting section. An electric vacuum cleaner having an airflow guide inclined toward the intake port of the electric vacuum cleaner. 8. The electric vacuum cleaner according to claim 7, wherein a tip end portion of the airflow guide located near an intake port of the electric blower is formed in an arc shape. 9. The electric vacuum cleaner according to claim 7, wherein the airflow guide is hollow. 10. The electric vacuum cleaner according to claim 7, wherein an inclined portion of the airflow guide is formed in an arc shape toward the outside of the space. 11. An electric blower equipped with a fan casing having a suction port, a dust collecting part for collecting dust by a suction airflow generated by the operation of the electric blower, and the built-in electric blower and the dust collecting part. An electric vacuum cleaner having a cleaner body, wherein a space is formed between an exhaust side of the dust collecting section and an intake port of the electric blower, and the electric blower is provided in the space from the exhaust side of the dust collecting section. An electric vacuum cleaner, which is provided with a holding portion that is formed integrally with the vacuum cleaner body while being inclined toward the intake port of the vacuum cleaner. 12. An electric blower having a fan casing having a suction port, a dust collecting portion for collecting dust by a suction airflow generated by the operation of the electric blower, the electric blower and the dust collecting portion are built-in. An electric vacuum cleaner having a cleaner body, wherein a space is formed between an exhaust side of the dust collecting section and an intake port of the electric blower, and a plurality of ribs are provided on an exhaust side of the dust collecting section of the space. An electric vacuum cleaner, wherein a protective guard is provided, and each of a plurality of ribs of the protective guard is attached at an angle of inclination toward an intake port of the electric blower. 13. An electric blower having a fan casing having a suction port, a dust collecting portion for collecting dust by a suction airflow generated by the operation of the electric blower, and the electric blower and the dust collecting portion are built-in. An electric vacuum cleaner having a cleaner body, wherein a space is formed between an exhaust side of the dust collecting section and an intake port of the electric blower, and the electric blower is provided in the space from the exhaust side of the dust collecting section. A holding portion that is inclined toward the intake port of the cleaner and is formed integrally with the cleaner body, and further has a protective guard provided with a plurality of ribs on the exhaust side of the dust collecting portion, and the mounting of the plurality of ribs of the protective guard An electric vacuum cleaner, characterized in that each of the angles is inclined toward the intake port of the electric blower.