KR100349292B1 - Electric cleaner - Google Patents

Abstract

An object of the present invention is to miniaturize an electric vacuum cleaner and to reduce noise while maintaining suction power.

The dust collecting chamber 250, the electric blower 270, and the cord reel 280 are disposed in this order, and round portions are provided at the peripheral edges of the exhaust ports 290a and 290b in the upper portion of the electric blower cover 290. Exhaust passages 124a and 124b are formed on both sides of the cover 290, and an auxiliary filter 242 is provided below, and air is discharged from the exhaust window 171 to the outside via the power cord reel mounting unit 193. Provide an electric cleaner.

Description

Electric Cleaner {ELECTRIC CLEANER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly, to a vacuum cleaner that is designed to be miniaturized and low noise.

In general, a vacuum cleaner forms a dust collecting chamber in front of an electric blower incorporated in a main body case, and collects dust-containing air drawn from the inlet connected through a hose to a suction opening opened in the dust collecting chamber to the dust collecting chamber. The dust is removed through the dust bag disposed therein, and the clean air is sucked into the electric blower, passed through the electric motor to cool the electric motor, and is discharged out of the vacuum cleaner from the exhaust part provided at the rear. Moreover, some air passes through a power cord reel, and cools a power cord or an electric sliding contact mechanism, and discharges it out of a vacuum cleaner.

Moreover, the vacuum cleaner disclosed by Unexamined-Japanese-Patent No. 10-117976 or 10-174667 has passed the power cord reel which installed the air which cooled the electric motor in the back, and supplies a power cord or an electric slide. It is a structure which discharges out a vacuum cleaner after cooling a movable contact mechanism.

By the way, it is preferable that such a vacuum cleaner operates quietly (low noise). Since the noise source of the vacuum cleaner is mainly an electric blower and an exhaust flow path, a sound absorbing material is provided on the wall surface of the exhaust passage of the electric blower to absorb the fluid sound and attenuate it so that the air is discharged out of the vacuum cleaner to achieve low noise. have.

However, when attempting to miniaturize the vacuum cleaner, the exhaust passage is shortened, so that it is difficult to satisfactorily absorb the fluid sound of the exhaust, and therefore, it is difficult to lower the noise. In addition, the amount of fluid sound absorption can be increased by reducing the cross-sectional area of the exhaust flow path. However, the airflow resistance of the exhaust flow path increases, resulting in a problem that the suction work rate of the vacuum cleaner decreases.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric vacuum cleaner in which the fluid sound is effectively absorbed from the exhaust of the electric blower and the noise is reduced without reducing the suction power while miniaturizing.

1 is an external perspective view of a vacuum cleaner main body according to one embodiment of the present invention;

2 is a longitudinal side view of the vacuum cleaner body;

3 is a cross-sectional view taken along the line III-III in FIG. 2;

4 is a cross-sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a V-V cross sectional view of FIG. 2; FIG.

Fig. 6 is a perspective view of the lower case of the vacuum cleaner main body, seen from above.

Fig. 7 is an exploded perspective view showing the wheel attachment state to the lower case in the vacuum cleaner main body.

Fig. 8 is a perspective view showing a state in which a wheel is attached to a lower case of the vacuum cleaner main body.

Fig. 9 is a perspective view of the state in which the wheels are attached to the lower case of the vacuum cleaner main body, viewed from below.

Fig. 10 is a perspective view showing an open state of an auxiliary filter cover attached to a lower case in the vacuum cleaner body.

Fig. 11 is an exploded perspective view showing a state of attaching an auxiliary filter to a lower case in this vacuum cleaner body.

Fig. 12 is a perspective view from above showing the state in which the front cover is attached to the lower case in the vacuum cleaner main body.

Fig. 13 is a perspective view from above showing a state in which a dust collecting chamber case is additionally attached to a lower case in the vacuum cleaner main body.

Fig. 14 is a perspective view of the dust collecting chamber case of the vacuum cleaner main body, seen from the front.

Fig. 15 is a perspective view from above showing the state where the control device substrate is attached to the dust collecting chamber case attached to the lower case of the vacuum cleaner main body.

Fig. 16 is a perspective view from above showing a state in which an electric blower and a power cord reel are loaded in a lower case in the vacuum cleaner main body.

Fig. 17 is a perspective view of the electric blower cover provided around the electric blower in the vacuum cleaner main body, seen from above.

18 is a perspective view of the electric blower cover seen from below;

Fig. 19 is a perspective view of the upper case of the vacuum cleaner main body, seen from above.

Fig. 20 is a bottom view of the upper case in this vacuum cleaner body.

Fig. 21 is a perspective view of the rear lid of the vacuum cleaner main body, seen from the inside.

<Explanation of symbols for the main parts of the drawings>

100: body case

110: lower case

115: bottom plate

119: auxiliary filter chamber

124a, 124b: exhaust passage

130: upper case

150: front cover

170: rear cover

171: exhaust window

180: auxiliary filter chamber cover

191: dust collecting chamber installation unit

192: electric blower installation

193: power cord reel installation

242: auxiliary filter

270: electric blower

290: electric blower cover

290a, 290b: exhaust port

293a to 294b: peripheral edge surface

321, 322a, 322b, 323a to 323c: sound absorbing material

The present invention arranges the dust collecting chamber, the electric blower and the cord reel in a substantially straight line, installs an electric blower cover covering the electric blower, installs an exhaust port in the upper part of the electric blower cover, and provides both sides of the electric blower cover. A flow path connected to the cord reel seal under the auxiliary filter is provided, an exhaust passage facing downward is provided, a sound absorbing material is installed on the blower cover of the exhaust passage and the surface opposite thereto, an auxiliary filter is provided below the electric blower cover, and a lower side of the auxiliary filter is connected to the cord reel seal. And an exhaust vent provided in a part of the cord reel seal, which reduces noise by releasing fluid noise discharged out of the cleaner together with exhaust, and suppresses an increase in fluid resistance due to peeling, thereby reducing a reduction in suction power. It is to suppress.

Further, a rounded portion is provided at the peripheral edge of the exhaust port of the electric blower cover, and the exhaust passage is gradually narrowed, and then gradually enlarged, thereby increasing the amount of noise absorption and suppressing the generation of fluid sound more effectively. will be.

Then, a rear air layer is provided in the sound absorbing material at the portion facing the exhaust port of the electric blower cover, or the sound absorbing material is attached to the sound absorbing material to increase the sound absorbing performance and reduce the noise transmitted from the wall.

1 is an external perspective view of a vacuum cleaner main body according to an embodiment of the present invention.

The body case 100 forming the outline of the vacuum cleaner body includes a lower case 110, an upper case 130, a front cover 150, a rear cover 170, and an auxiliary filter chamber cover 180 (to be described later). Consists of. The vacuum cleaner main body attaches a front wheel (caster) 211 (to be described later) and rear wheels 212 and 213 to the lower case 110 so that the floor surface can travel (pull). In addition, the handle 220 is attached to the upper case 130 so that it can stand up, stand up to be used during transportation. In addition, the suction port 230 is connected to the suction port opened in the front cover 150 via the suction hose 230, and a suction force is generated by the electric blower built in the cleaner body, and dust-containing air is discharged from the suction port of the suction port. The dust is sucked into the cleaner and dust is removed by the dust collecting bag installed in the dust collecting chamber 250. After the dust is removed, the air flows into the room where the electric blower or the like is stored, cools the electric motor, cools the power cord reel, and discharges it out of the vacuum cleaner from the exhaust window 171 formed in the rear cover 170. Configuration.

2 to 21 show the internal structure of the vacuum cleaner main body. Fig. 2 is a longitudinal sectional side view of the main body of the vacuum cleaner, Fig. 3 is a sectional view taken along the line III-III in Fig. 2, Fig. 4 is a sectional view taken along the line IV-IV in Fig. 2, and Fig. 5 is a sectional view taken along the line V-V in Fig. 2; Fig. 6 is a perspective view of the lower case of the vacuum cleaner body seen from above, Fig. 7 is an exploded perspective view showing a wheel attachment state to the lower case, and Fig. 8 is a state of attaching a wheel to this lower case. 9 is a perspective view of the lower case in which the wheels are attached to the lower case, and FIG. 10 is a perspective view showing the state of opening the auxiliary filter cover attached to the lower case, and FIG. 11 is an auxiliary to the lower case. It is an exploded perspective view which shows the filter attachment state. Fig. 12 is a perspective view from above showing a state in which the front cover is attached to the lower case in the vacuum cleaner main body, and Fig. 13 is a state in which a dust collecting chamber case is additionally attached to the lower case in the vacuum cleaner main body. Fig. 14 is a perspective view of the dust chamber case seen from the front, Fig. 15 is a perspective view from the top showing a state where a control device substrate is attached to the dust chamber case in the vacuum cleaner main body. Fig. 16 is a perspective view from above showing a state where an electric blower and a power cord reel 280 are additionally loaded in the vacuum cleaner main body. Fig. 17 is a perspective view of the electric blower cover provided around the electric blower in the vacuum cleaner main body, seen from above, and Fig. 18 is a perspective view of the electric blower viewed from below. 19 is a perspective view of the upper case of the vacuum cleaner main body, seen from above, and FIG. 20 is a bottom view thereof. Fig. 21 is a perspective view of the rear lid of the vacuum cleaner main body, seen from the inside.

First, the outline | summary of the shape and combination of each component is demonstrated.

Inside the main body case 100 of this vacuum cleaner main body, the dust collecting chamber installation part 191 is partitioned in the front side (inlet side is called a front side), and the electric blower installation part 192 is partitioned in the center part, A power cord reel attaching portion 193 is partitioned on the rear side.

As shown in FIG. 6, the lower case 110 includes side wall portions 111 and 112 standing on both sides to form the dust collecting chamber installation portion 191 and a partition wall portion standing up between them. ), The dust collecting chamber installation space 191a opened upward and forward is partitioned. In addition, in order to form the electric blower installation part 192, the curved bottom plate part 115 is installed upward so that the said partition may open upward between the partition wall part 113 and the partition wall part 114 which stood up further in the back, and upwards, The electric blower installation space 192a opened by this is partitioned. A gap 121 or 122 is formed between the bottom plate 115 and the side wall portions 111 and 112 to form an exhaust passage (to be described later). In order to form the power cord reel mounting portion 193, the partition wall portion 116 stands up behind the partition wall portion 114, thereby forming the power cord reel mounting space 193a.

As shown in FIGS. 2 and 9, the lower case 110 is rotatable to the eccentric substrate 211a on a projection 117 protruding from the side opposite to the surface on which the dust collecting chamber installation space is formed, that is, the bottom portion 110. The front wheel 211 is attached to the eccentric board | substrate 211a by fitting. 7 and 8, the rear wheels 212 and 213 protrude inwardly of the rear wheels 212 and 213 to the attachment cylindrical portion 118 protruding from the rear half of the side wall portions 111 and 112. Attached axles 212a and 213a are rotatably fitted.

9 to 11, the auxiliary filter chamber 119 which faces the lower side of the bottom plate 115 and communicates with the gaps 121 and 122 at the bottom of the lower case 110. To form and open the auxiliary filter chamber 119 with the support frame 241 as a supporting portion so that the auxiliary filter (HEPA filter) 242 is detachably stored therein, and the opening is opened by the auxiliary filter chamber cover 180. Cover it open and close.

In addition, the lower case 110 is provided on the front end side of the lower case 110 by the support shaft 152 with the front cover 150 having the suction opening 151 fitted thereinto insert the suction hose 230 therein. It is attached so that it may be embossed with respect to the front-end | tip of the bottom part of the bottom part, and it hangs and fixes by the clamp claw part 153.

In the dust collecting chamber installation space 191a for the dust collecting chamber mounting portion 191 in the lower case 110, as shown in Figs. 3, 13, and 14, attachment flanges 251, 252 are provided on both sides. The cylindrical cylindrical dust collecting chamber case 250 protruding from the side is inserted laterally between the side wall portions 111 and 112 on both sides of the lower case 110, and the flanges 251 and 252 are inserted into the side wall portions 111 and 112. The dust collecting chambers 250a are formed in the airtight state by mounting them on the upper edges of the upper edges and fixing them with the fixing screws 253 and 254. The dust collecting chamber case 250 has a large opening at the front end, a vent opening 256 provided with a grating 255 at the rear end (inner wall of the dust collecting chamber), and the inside thereof is shown in FIGS. 2 and 3. As mentioned above, the auxiliary filter 243 was provided. And, at the rear edge, a connecting edge 257 protruding in an annular shape to surround the vent hole 256 is formed.

Moreover, the upper part of the dust collecting chamber case 250 is provided with the seat part 258 with a control apparatus which mounts and fixes a control apparatus. And as shown in FIG. 15, the control apparatus board | substrate 260 is mounted and screwed to this control apparatus seat part 258. As shown in FIG.

As shown in FIG. 16, the electric blower 270 is connected to the dust chamber case 250 in the electric blower installation space 192a for the electric blower mounting unit 192 in the lower case 110. The power cord reel 280 is installed in the power cord reel installation space 193a.

On the upper side of the electric blower 270, an approximately saddle-shaped electric blower cover 290 as shown in Figs. 17 and 18 is mounted, and from the top thereof, an upper case 130 as shown in Figs. ) To fix the electric blower 270 and the power cord reel 280 between the lower case 110 and the upper case 130 by screwing the lower case 110 to the lower case 110. Bonding end edges of the lower case 110 and the upper case 130 are bonded in the airtight state in the electric blower installation unit 192 to form an exhaust ventilation path.

Then, the rear edge of the lower case 110 and the rear edge of the upper case 130 is closed by inserting and screwing the rear cover 170 having the exhaust window 171 as shown in FIG.

Next, the internal structure of the vacuum cleaner main body which assembled each component in this way is demonstrated in more detail.

As shown in Figs. 2 and 3, the opening edges of the front end of the dust collecting chamber case 250 are lined with an entrance plate support plate 259, which is embossable from the upper edge to the outside, and the lower edge and the inlet of the opening edge. By contacting the plate support plate 259 with the inlet plate 311 of the dust collecting bag 310 to close the front cover 150, the lower edge of the opening edge of the dust chamber case 250 and the inlet plate support plate 259 and The entrance plate 311 is clamped between the front cover 150 to hold the bag 312 in the dust collecting chamber 255, and the opening edge of the dust collecting chamber case 250 is attached to the front cover 150. Closed in a confidential state. And the opening 311a formed in the entrance plate 311 makes the front-end | tip part (inner end part) of the suction port 151 of the closed front cover 150 contact the entrance plate 311 via the packing 154, and is airtight Keep it in position to communicate.

The distal end of the connection edge 257 of the dust collecting chamber case 250 and the outer circumferential surface of the fan casing 271 in order to sandwich the electric blower 270 between the lower case 110 and the upper case 130 for dustproof support. In contact with the front face side of the anti-vibration rubber ring 272 fitted to cover the peripheral edge part of the front face, it is connected to the inlet port 241a of the fan casing 271, maintaining an airtight state.

By rotating the centrifugal fan at a high speed by the electric blower 270 and the alternating commutator electric motor, the air is sucked out of the intake port 271a and passed through the motor casing 273 to cool the rotor, stator, and rectifier (commutator and brush) of the motor. After that, it was set as the structure which discharges | emits from the exhaust window 273a formed in the outer periphery and the end surface of the motor casing 273. The electric blower 270 is fitted with a dustproof rubber ring 272 fitted to the fan casing 273 and a dustproof rubber ring 274 fitted with the bearing housing 273b formed at the rear end surface of the motor casing 273. , The bottom plate portion 115 formed in the lower case 110 and the partition is mounted so as to contact the wall portion 114, the electric blower cover 290 by the upper case 130 in contact with the electric blower cover 290 from the upper side. ) Is elastically clamped and is installed in the electric blower installation space 192a.

The bottom plate portion 115, the partition wall portions 113 and 114, and the electric blower cover 290 of the lower case 110 form an exhaust collection passage 123 around the motor casing 273, and the exhaust collection passage ( The flame retardant and breathable sound absorbing material 321 is accommodated in the 123 so as to surround the motor casing 273.

As shown in Figs. 17 and 18, the electric blower cover 290 has exhaust ports 290a and 290b and sound absorbing material support ribs 291 and 292 protruding outward. Peripheral edge surfaces 293a, 293b, 294a, and 294b forming the exhaust ports 290a and 290b have a rounded portion that curves in the exhaust flow dividing direction, thereby flowing out of the exhaust ports 290a and 290b to provide an electric blower cover 290. The peeling of the exhaust stream classified into both sides was suppressed, and generation | occurrence | production of peeling sound was prevented. In addition, the peripheral edge surfaces 293a, 293b, 294a, and 294b had a rounded portion. Thereby, the area of the exhaust ports 290a and 290b can be made small without increasing fluid resistance. Therefore, the attachment length of the sound absorption material (to be described later) facing downward can also be lengthened. For this reason, the amount of reduction of fluid sound (noise) can be enlarged.

The electric blower cover 290 is hermetically bonded to the lower edge with the upper edge of the bottom plate 115 and around the partition walls 131 and 132 and the lower case 110 formed inside the upper case 130. The gap formed between the wall portions 113 and 114 so as to rotate both outer sides of the electric blower cover 290 and the gap 121 formed between the bottom plate portion 115 and the side wall portions 111 and 112 of the lower case 110. Through 122, exhaust passages 124a and 124b that extend to the auxiliary filter chamber 119 are formed. Sound absorbing materials 322a and 322b are attached to the outer circumferential surfaces of the electric blower cover 290 and the bottom plate portion 115 facing the exhaust passages 124a and 124b, and the inner surfaces of the upper case 130 and the lower case 110. Sound-absorbing materials 323a to 323c are attached and installed.

Since the back surface side of the handle storing recesses 133 and 134 protrude inside the upper case 130, the unevenness of the wall surfaces of the exhaust passages 124a and 124b due to the protrusion of the handle storing recesses 133 and 134 is projected. The sound absorbing materials 323a and 323b are joined to the top of the inner side of the upper case of the handle accommodating recesses 133 and 134 to form a smooth exhaust passage wall surface with a small step so as to reduce the exhaust flow caused by the exhaust. In addition, the top of the upper case inside the handle housing recesses 133 and 134 is provided with inclined surfaces 133a and 134a connected to the ends of the sound absorbing materials 323a and 323b to form an approximately smooth exhaust passage wall surface. .

In addition, inside the upper case 130, a flow split rib 135 is disposed to face the center of the exhaust ports 290a and 290b so as to face the rear surface of the sound absorbing material 323a by the distal end of the flow split rib 135. The sound absorbing material 323a is bent in a V-shape to press the air so that the exhaust stream from the exhaust ports 290a and 290b can be smoothly classified into the exhaust passages 124a and 124b.

Between the lower edge of the partition wall portion 114 and the auxiliary filter chamber cover 180, the power cord reel mounting space of the power cord reel mounting unit 193 is located from the downstream side of the auxiliary filter 242 in the auxiliary filter chamber 119. Ventilation windows 125a and 125b connected to 193a were opened, and exhaust gas passing through the auxiliary filter 242 was allowed to flow into the power cord reel installation space 193a.

The power cord reel 280 biases the rotating drum 283 by the spiral spring 282 to wind the power cord 281, and is slipped by a slip ring and a contact piece inside the body portion of the rotating drum 283. It is the structure which formed the electrical path by the moving-contact mechanism (not shown). Exhaust exhausted from the vent windows 125a and 125b to the power cord reel installation chamber 193a contacts the power cord 281 and the sliding contact mechanism, cools them, and is discharged out of the vacuum cleaner from the exhaust window 171.

A return-shaped rib 172 protruding from the inside of the rear cover 170 protrudes to cover the outer circumference of the disc side of the rear side of the rotary drum 283 and overflows from the rotary drum 283. The power cord 281 functions to return into the rotating drum 283.

According to the vacuum cleaner of the present embodiment, the ventilation path between the dust collecting chamber 250a and the electric blower 270 has a front end portion of the annular connection edge 257 protrudingly installed on the rear side of the dust collecting chamber case 250. In order to carry out dustproof support of 70, it formed in contact with the anti-vibration rubber ring 272 fitted to the fan casing 271, and airtightness with the outside improves.

In addition, since the dust collecting chamber 250a is formed of one component, the joining edge is reduced compared to the configuration formed by the combination of a plurality of components, thereby improving airtightness with the outside.

The exhaust gas discharged from the exhaust window 273a of the motor casing 273 of the electric blower 270 is collected in the exhaust collection passage 123 formed around the motor casing 273 and passes through the sound absorbing material 321 to exhaust the exhaust port. A portion of the fluid sound generated in the electric blower 270 during the period 290a and 290b is absorbed and attenuated by the flame-retardant and breathable sound absorbing material 321.

The exhaust flows from the exhaust ports 290a and 290b are ejected from the exhaust ports 290a and 290b to classify them into exhaust passages 124a and 124b which turn around both sides of the electric blower cover 290. 290b is easily peeled off at the downstream side of the peripheral edges, but in the present embodiment, the exhaust air is curved in the outflow direction at the peripheral edges 293a, 293b, 294a and 294b of the exhaust ports 290a and 290b. I have a rounded part. Thereby, peeling of exhaust stream can be suppressed and generation | occurrence | production of a peeling sound can be prevented. In addition, by reducing the area of the exhaust ports 290a and 290b, the length of the attachment of the sound absorbing material 322a in the exhaust flow direction can be increased, the noise can be further reduced, and the fluid resistance can be reduced. There is no deterioration.

In addition, since the rear of the sound absorbing material facing the exhaust ports 290a and 290b of the electric blower cover 290 has a space between the upper cases 130, the sound absorbing material can improve the sound absorbing performance to a lower frequency by the air layer behind the sound absorbing material. Can be. Although the thickness of this air layer differs according to a place, it is about 10 mm, and the sound absorption performance can be doubled at 1 kHz with respect to 10 mm of the used sound absorption material, for example. Moreover, it is also possible to pile up a sound absorption material in the part of this air layer. By stacking the sound absorbing material, the sound absorption performance can be further improved.

In addition, the joint between the electric blower cover 290 and the sound absorbing materials 322a and 322b attached to the outer circumferential surface of the bottom plate portion 115 of the lower case 110 forms an approximately smooth curved surface and is attached to the inner side of the upper case 130. The joint between the sound absorbing materials 323a and 323b and the inclined surfaces 133a and 134a at the top of the handle accommodating recesses 133 and 134 also has a substantially smooth curved surface. By such a configuration, the exhaust passages 124a and 124b can be configured as flow paths having smooth wall surfaces. For this reason, disturbance and peeling of exhaust stream can be suppressed and generation | occurrence | production of a fluid sound can be suppressed. In addition, an increase in fluid resistance can be suppressed.

In addition, since the generation of the fluid sound can be suppressed, the space between the sound absorbing materials 322a and 322b and the sound absorbing materials 323a to 323c can be narrowed (small) to reduce the space through which the sound passes. For this reason, the effect which can increase the noise reduction amount by the sound absorption of the sound absorption materials 322a, 322b, 323a-323c can also be acquired.

Then, the gap between the sound absorbing materials 322a and 322b serving as the exhaust flow path (exhaust passage) and the sound absorbing materials 323a to 323c narrows down as it goes downstream from the top of the exhaust ports 290a and 290b of the electric blower cover 290. It is formed to become wider. As a result, the upstream portion can receive the disturbed airflow flowing out from the exhaust ports 290a and 290b of the electric blower cover 290, and then can reduce the airflow in the narrowed gap to promote the effect of suppressing the disturbance of the airflow. .

Since the upper case 130 requires handle accommodating recesses 133 and 134, a large space is required, and the distance between the exhaust ports 290a and 290b of the electric blower cover 290, which is the loudest in the exhaust passage, and the upper case. In this case, the intrusion of sound into the wall surface of the upper case 130 facing the exhaust ports 290a and 290b can be reduced, and the transmission of sound through the wall can be reduced. Moreover, it is more effective to provide a sound absorbing material in the portion of the air layer. Further, by attaching a vibration suppressing material or the like to a part of the air layer, transmission sound from the wall surface can be more effectively reduced.

In addition, since the gap gradually widens in the downstream, the airflow entering the auxiliary filter 242 can be lowered by decelerating the airflow while efficiently converting the dynamic pressure to the static pressure, so that the airflow resistance in the auxiliary filter 242 is reduced. Can reduce the loss.

When the fine dust from the dust collecting chamber side adheres to the surface of the sound absorbing material, the sound absorption performance of the sound absorbing material decreases, but the attached fine dust moves downward when the flow in the exhaust passage flows from the top to the bottom, and the vacuum cleaner It is easy to move downward from the surface of the sound absorbing material when the cleaner vibrates at the time of transportation. In this way, the dust adhering to the surface of the sound absorbing material moves to the lower part of the cleaner and is supported by the auxiliary filter 242. Therefore, the effect which the sound absorption performance of a sound absorption material does not fall easily is acquired. Since the dust supported by the auxiliary filter 242 can be made into a state in which dust adheres little by taking out and cleaning the auxiliary filter 242, the suction work rate also hardly falls. In addition, since dust adheres and dust does not stay and solidify due to moisture in the air, the exhaust passage is narrowed and fluid resistance does not increase. Therefore, even if a cleaner is used for a long time, the fall of suction force is hard to occur.

In addition, since the noise generated by the disturbance of the flow is small, it is possible to narrow the gap between the sound absorbing materials 322a and 322b and the sound absorbing materials 323a to 323c, and by narrowing the gap, the width of the main body of the electric cleaner can be reduced. Therefore, the size can be reduced.

Since the handle accommodating recesses 133 and 134 protruding into the upper case 130 are connected to the sound absorbing materials 323a and 323b, the handle accommodating recesses 133 and 134 are formed. Since there is no need to provide a wall or the like for separating from the exhaust flow path, the height of the main body of the vacuum cleaner is also lowered, so that the size and weight can be reduced.

In addition, the bottom plate portion 115 may be separated from the lower case 110 to be integrally formed with the electric blower cover 290 and may be formed so as to be attached thereto. Even if formed in this way, the same effect as in this embodiment can be obtained.

The auxiliary filter 242 installed in the auxiliary filter chamber 119 formed between the bottom plate 115 and the auxiliary filter chamber cover 180 has a space between the auxiliary filter 242 and the auxiliary filter chamber cover 180. Since it is installed to be inclined gradually toward the ventilation windows 125a and 125b to the power cord reel installation space 193a, the exhaust gas passing through the auxiliary filter 242 is collected toward the ventilation windows 125a and 125b. In the course of the flow, the increase in the flow rate and the increase in the space are balanced, so that the flow velocity of the exhaust stream is increased so as to reduce the increase in the exhaust resistance.

In addition, an exhaust stream flows into the power cord reel installation space 193a and is discharged out of the vacuum cleaner from the exhaust window 171 of the rear cover 170 through a vent hole provided in the inner side of the body portion of the rotating drum 283 or the disc side. Therefore, the power cord reel 280 can be effectively cooled. In addition, since a special room for exhausting becomes unnecessary, the length of the vacuum cleaner main body can be shortened.

Since the exhaust stream containing little dust is introduced into the power cord reel installation space 193a, dust does not accumulate in the electrical contact of the cord reel and the like, so that electrical insulation deterioration does not occur.

In addition, the power cord reel installation space 193a includes an area reduction portion of the end surface of the auxiliary filter chamber 119 on the power cord reel installation space 193a side, an area reduction portion of the exhaust window 171, and a power cord reel installation space ( The function as an expansion type (interference type) silencer is also achieved from the area enlargement part of 193a). In this embodiment, the cross sections are formed in the order of 30 cm 2, 110 cm 2 and 40 cm 2, and act as a silencer interfering in the vertical direction with an expansion ratio of about 3 and a length of about 18 cm. You can get it. If the area reduction area is made smaller, the noise level can be increased. However, if the area of the end surface on the side of the power cord reel installation space 193a of the auxiliary filter chamber 119 is reduced, the speed is increased, and the noise generated in the power cord reel installation space 193a is increased. In addition, if the area of the exhaust window 171 is made smaller, the speed of the exhaust air is increased, which causes unpleasant sensations by touching the user or by surrounding people. The exhausted air disturbs the surrounding air, and the effect of causing problems such as promoting the floating of dust into the air on the wall or the like is stronger. Therefore, it is preferable that the area of the exhaust window 171 is larger than the area of the end face on the side of the power cord reel installation space 193a of the auxiliary filter chamber 119.

And by setting it as the structure which can open and close the auxiliary filter chamber cover 180, the auxiliary filter 242 can be taken out easily, the cleaning and replacement | exchange of the auxiliary filter 242 can be performed easily, and the air permeation resistance will increase. It can be suppressed.

In addition, since the control apparatus board 260 in this embodiment is mounted in the dust collecting case 250 in the position which is hard to heat from the electric blower 270, the temperature rise by heat transfer from the electric blower 270 is raised. Can alleviate In addition, since the dust collecting case 250 cools the inside of the dust collecting chamber 250a by the flow of low-temperature suction air, the air around the control apparatus substrate 270 located on the outside is also naturally convex so that the control apparatus substrate 260 Heat dissipation) can further reduce the temperature rise of the control device substrate 260.

And since the double wall can be comprised by the dust collecting chamber 250a, the upper case 130, and the lower case 110, the effect which can suppress the permeation of the sound from the dust collecting chamber installation part 191 is also acquired. Can be.

According to the present invention, it is possible to realize low noise by effectively absorbing and attenuating the fluid sound contained in the exhaust of the electric blower in the exhaust passage of the narrow gap.

In addition, the peeling of the airflow flowing out from the exhaust port of the electric blower cover to the exhaust passage can be suppressed, and the generation of the peeling sound can be suppressed.

And the width | variety and length of a vacuum cleaner main body can be made small, and size reduction can be aimed at.

Claims (5)

In the vacuum cleaner having a dust collecting chamber, an electric blower and a cord reel, The dust chamber, the electric blower, and the cord reel are arranged in a substantially straight line in order, and cover an electric blower covering the electric blower, an exhaust port on an upper portion of the electric blower cover, and both sides of the electric blower cover. A lower exhaust passage is provided, a sound absorbing material is installed on the blower cover and an opposite surface of the exhaust passage, an auxiliary filter is installed below the electric blower cover, and is connected to a cord reel seal below the auxiliary filter. A vacuum cleaner is provided, and an exhaust port is provided in a part of the cord reel seal. The electric vacuum cleaner according to claim 1, wherein the width of the exhaust passage is lower than the upper portion so that the width of the exhaust passage is reduced and then enlarged. The electric vacuum cleaner according to claim 1, wherein the peripheral edge surface of the exhaust port provided on the top of the blower cover has a rounded portion that curves in the exhaust flow dividing direction. The electric vacuum cleaner according to claim 1, wherein a plurality of openings through which air passes are provided in a wall surface of the cord reel in the cord reel. The electric vacuum cleaner according to claim 1, wherein the flow path connected to the cord reel seal of the lower side of the auxiliary filter is increased to the cord reel side, and the cross-sectional area of the flow path is increased.