JP5931455B2 - Electric vacuum cleaner - Google Patents

Description

  Embodiments of the present invention relate to a vacuum cleaner having high suction performance.

  An exhaust fan is provided on the peripheral wall of the fan cover of the electric blower at intervals along the circumferential direction, and a part of the air sucked into the electric blower is discharged outside the electric blower from each exhaust hole, and the suction performance A vacuum cleaner that improves the above is known as the prior art.

  The electric blower of this vacuum cleaner accommodates a control board or a control part of a heating element in a cover body that covers a part of the outer periphery of a bracket (electric motor case) that fixes the stator and the rotor, and is connected to the rotor and connected to the bracket. A casing (fan cover) that covers an impeller (fan) disposed outside is connected to the bracket, and an exhaust part (exhaust hole) that discharges a part of the airflow sucked by the impeller is provided on the outer periphery of the casing. The guide which directs the flow of the airflow discharged | emitted from the part is provided in the outer periphery of the casing.

  With this configuration, a part of the airflow sucked by the impeller is discharged from the exhaust part before passing through the motor part having a large flow path resistance, and the flow of the exhaust air is directed by the guide, so that the electric blower Improved suction performance.

  Further, the guide directs the flow of exhaust air exhausted from the exhaust part. That is, the outer diameter of the casing is larger than the outer diameter of the bracket of the electric blower, the outer diameter of the guide is larger than the outer diameter of the casing, and the outer peripheral portion of the guide is formed substantially parallel to the outer peripheral surface of the casing. As a result, the exhaust fan exhausted through the exhaust part is located away from the outer peripheral surface of the bracket and away from the casing that occupies the front part of the electric blower toward the rear of the electric blower. It is discharged almost in parallel. Then, a part of the exhaust air whose flow is directed in this way is circulated through the inside of the cover body to cool the control board or the heating element in the cover body.

Japanese Patent No. 4288980

  If a part of the airflow sucked into the electric blower is discharged from the exhaust part of the casing covering the impeller, the amount of air flowing through the motor part is reduced accordingly. Thereby, since the performance which air-cools the motor part of an electric blower falls, the device which supplements this point is requested | required.

  Furthermore, one of the noises generated by the electric blower is impeller wind noise, which is harsh. However, in the configuration in which the exhaust part is provided in the casing in order to improve the suction performance as described above, the wind noise of the impeller tends to be emitted to the outside through the exhaust part. In particular, the wind noise that passes through the top of the cleaner body using the impeller as a sound source is more easily perceived by the cleaning operator than the sound that escapes in other directions, so that it is required to make such noise as low as possible.

  The embodiment can improve the cooling effect for the electric motor part of the electric blower while maintaining high suction performance, and can reduce the sound that escapes upward from the cleaner body using the fan of the electric blower as a sound source. Is to provide a simple vacuum cleaner.

In order to solve the above-described problems, an electric vacuum cleaner according to an embodiment includes an electric blower including a blower unit and an electric motor unit so that a central axis thereof is horizontal, and is vibration-proof in the vacuum cleaner body. To support. The air blowing unit includes a fan and a fan cover covering the fan. The fan cover has a plurality of exhaust holes for discharging part of the air sucked by the fan. The motor case of the motor unit that rotates the fan has an exhaust port that discharges air sucked by the fan. A sound-absorbing material guide is integrally provided so as to be continuous with the anti-vibration rubber fitted on the fan cover. The guide has a first guide portion facing the exhaust hole and covering the fan cover from above, a second guide portion bent from the first guide portion toward the outer peripheral surface of the motor case, and a fan cover on the inner surface of the first guide portion. And a plurality of partition portions projecting toward . The second guide portion guides the air guided by the first guide portion so as to blow against the outer peripheral surface. An air passage for guiding the air discharged from the exhaust hole is formed between the guide and the outer surface of the electric blower, and an outlet of the air passage is formed between the outer peripheral surface of the motor case and the second guide portion. Yes.

It is a perspective view which shows the vacuum cleaner which concerns on 1st Embodiment. It is sectional drawing which shows the electric blower periphery with which the vacuum cleaner of FIG. 1 is provided. It is a figure which expands and shows the F3 part in FIG. It is a top view which shows the relationship between a part of fan cover of the electric blower with which the electric vacuum cleaner of FIG. 1 is equipped, and a part of anti-vibration rubber | gum fitted by this cover in a partly notched state. FIG. 5 is a cross-sectional view taken along line F5-F5 in FIG. It is a perspective view which shows the electric blower with which the vacuum cleaner of FIG. 1 is provided. It is a perspective view which shows the electric blower with which the vacuum cleaner which concerns on 2nd Embodiment is provided in the state by which the guide was attached to this.

  Hereinafter, the vacuum cleaner of 1st Embodiment is demonstrated in detail with reference to FIGS.

  FIG. 1 is a perspective view showing an entire canister-type vacuum cleaner, for example. The vacuum cleaner 1 includes a vacuum cleaner body 2, an electric blower 8, an intake-side anti-vibration rubber 21, an exhaust-side anti-vibration rubber 23, a guide 25, a dust collection unit such as a dust collection filter 33, and a dust absorption A hose 35, an extension pipe 38, a floor suction port 39, and the like are provided.

  Wheels are attached to the vacuum cleaner body 2 so as to be freely movable on an indoor floor surface (floor surface to be cleaned). The vacuum cleaner main body 2 has a dust collection chamber lid 3 which forms an upper surface of the front portion and can be opened and closed. A dust collection chamber (not shown) is formed in the vacuum cleaner body 2 so as to be directly below the dust collection chamber lid 3, and is sucked into the rear side of the dust collection chamber, in other words, the vacuum cleaner body 2. A blower chamber S (see FIG. 2) is provided on the downstream side of the dust collection chamber with reference to the airflow passing through the main body.

  The vacuum cleaner main body 2 has a main body lower case 2a, a main body middle case 2b, and a main body upper case 2c, as shown in FIGS. The main body middle case 2b partitions the blower chamber S and is connected to the rear part of the main body lower case 2a from above. The blower chamber S communicates with the outside of the cleaner body 2 through an exhaust unit (not shown) formed at the rear of the cleaner body 2.

  As shown in FIG. 2, a blower support portion 4 is provided at the front end of the blower chamber S. The blower support part 4 is formed in each of the main body lower case 2a and the main body middle case 2b. Similarly, an electric motor support 5 is provided at the rear end of the blower chamber S. The electric motor support 5 is formed in each of the main body lower case 2a and the main body middle case 2b. The blower support part 4 and the motor part support part 5 are formed of ribs or the like. Furthermore, a guide support portion 6 that projects into the blower chamber S is provided in each of the main body lower case 2a and the main body middle case 2b.

  The main body upper case 2c is connected to the main body lower case 2a from above. The upper surface opening of the dust collection chamber that is opened and closed by the dust collection chamber lid 3 is defined by the main body upper case 2c and the front portion of the main body upper case 2c. The rear portion of the main body upper case 2c covers the main body middle case 2b from above.

  An electric blower 8 is accommodated in the blower chamber S in the cleaner body 2. The electric blower 8 includes an electric motor unit 11 and an air blowing unit 15 connected to the electric motor unit 11.

  As shown in FIG. 2, the motor unit 11 includes a stator 11 a in which a stator winding (not shown) is attached in a motor case 12, a rotor 11 b that is rotatably disposed inside the stator 11 a, and two pieces The brush device 13 is attached and formed. The motor case 12 is made of metal, and is formed by connecting a first case member 12c and a second case member 12d as shown in FIG.

  The first case member 12c has an end plate portion at one end of the cylindrical portion, and has an annular projecting edge portion 12e (see FIG. 3) at the other open end of the cylindrical portion. Further, the first case member 12c of the motor case 12 has a plurality of exhaust ports 12a on the end plate portion side of the cylindrical portion, and a bearing housing that protrudes outward from the center of the end plate portion. It has a portion 12b.

  The second case member 12d is provided across the other open end of the cylindrical portion with both ends fixed to the overhanging edge portion 12e of the first case member 12c. The second case member 12d has a bearing housing portion (not shown) at the center thereof.

  The stator 11a has an annular shape and is fixed to the motor case 12 so as to be able to transfer heat in contact with the inner peripheral surface of the cylindrical portion of the first case member 12c. For this reason, the heat generated by the stator winding of the stator 11 a can be released to the outside from the outer surface of the motor case 12. A ball bearing is accommodated in each of the bearing housing portions, and a rotor shaft 11c (see FIG. 2) of the rotor 11b is rotatably supported by these ball bearings. A commutator 11d (see FIG. 2) is attached to one end of the rotor shaft 11c. The other end portion of the rotor shaft 11c passes through the bearing housing portion of the second case member 12c and protrudes outside the motor case 12. Two brush devices 13 are attached to the cylindrical portion of the first case member 12c. These brush devices 13 have brushes in contact with the outer peripheral surface of the commutator 11d.

  As shown in FIGS. 2 and 3, the air blower 15 includes a fan 16, a diffuser (not shown), and a fan cover 17.

  For example, a centrifugal fan is used as the fan 16, and the fan 16 is connected to the end of the rotor shaft 11 c that protrudes outside the motor case 12. The diffuser is used to guide the air discharged from the fan 16 into the electric motor case 12 while reducing the static pressure. The diffuser is disposed between the other open end of the first case member 12c and the fan 16. The first case member 12c is connected to the overhanging edge portion 12e.

  The fan cover 17 is made of metal and is disposed so as to cover the fan 16 and the diffuser. The fan cover 17 has a circular peripheral wall that is open at one end, and an end wall that is continuous with the other end of the peripheral wall, and an air inlet 17a (see FIG. 6) at the center of the end wall. Yes. The fan cover 17 is connected to the motor case 12 by fitting one end of the peripheral wall opened to the outer periphery of the overhanging edge 12e. The inside of the fan cover 17 and the inside of the electric motor case 12 are in communication.

  The fan cover 17 has a plurality of exhaust holes 18. Each exhaust hole 18 is sucked into the fan 16 through the intake port 17a and discharged to the outside of the electric blower 8 to discharge a part of the air that is discharged from the fan 16 and flows into the electric motor case 12. Is provided. These exhaust holes 18 are formed as long holes extending in the circumferential direction of the fan cover 17 as shown in FIG. 6, and are provided in the circumferential wall of the fan cover 17 at regular intervals, for example, along the circumferential direction.

  The anti-vibration rubbers 21 and 23 are made of a sound absorbing material that can be elastically deformed and has sound absorbing performance, for example, neoprene rubber. The anti-vibration rubber 21 has a ring shape larger in diameter than the fan cover 17 and is fitted on the fan cover 17, and a peripheral portion of the end wall of the fan cover 17 and a portion of the peripheral wall of the fan cover 17 on the end wall side. Covering. As shown in FIGS. 2 and 3, the fitting portion 21 a included in the vibration-proof rubber 21 is fitted to the outer peripheral surface of the peripheral wall of the fan cover 17, and the fitting depth D, in other words, to the fan cover 17. The hanging allowance is set to a depth that does not block the exhaust hole 18. The anti-vibration rubber 23 is fitted on the bearing housing portion 12 b of the electric motor case 12.

  The guide 25 is made of a sound-absorbing material that can be elastically deformed and has sound-absorbing performance, for example, neoprene rubber. The guide 25 is provided so as to be continuous with the anti-vibration rubber 21, and is preferably formed integrally with the anti-vibration rubber 21. . The outer diameter of the guide 25 is the same as the outer diameter of the fitting portion 21a. The guide 25 has the 1st guide part 25a, the 2nd guide part 25b, and the partition part 26, as shown in FIGS.

  The first guide portion 25a is integrally continuous with the fitting portion 21a of the anti-vibration rubber 21 and covers at least the fan cover 17 from above. Specifically, in the first embodiment, since the first guide portion 25 a is formed in a cylindrical shape, the first guide portion 25 a covers the entire circumference of the fan cover 17. The first guide portion 25a faces the outer surface away from the outer peripheral surface of the fan cover 17, and also faces the outer surface away from the outer surface of the portion of the motor case 12 on the protruding edge portion 12e side. . Therefore, the first guide portion 25 a faces the exhaust hole 18 and forms a first air path portion between the fan cover 17 and each outer surface of the electric motor case 12.

  The second guide portion 25b is provided to be bent from the first guide portion 25a toward the outer peripheral surface of the cylindrical portion of the first case member 12c included in the electric motor case 12. The second guide portion 25b faces the outer surface at a distance from the outer surface of the protruding edge portion 12e of the first case member 12c. For this reason, the second guide portion 25 b forms a second air path portion between the outer surface of the motor case 12.

  The first air passage portion and the second air passage portion communicate with each other to form an air passage P. Therefore, the guide 25 is provided by forming an air passage P for guiding the air discharged from the exhaust hole 18 between the outer surface of the electric blower 8. The airway cross-sectional area of the second airway part is larger than the airway cross-sectional area of the first airway part.

  The 2nd guide part 25b is separated from the cylindrical part outer peripheral surface of the 1st case member 12c, and forms exit PD of the air path P between this outer peripheral surface.

  As shown in FIGS. 4 to 6, the guide 25 has a plurality of partitions 26. In the first embodiment, the same number of partition portions 26 as the exhaust holes 18 protrude from the inner surface of the first guide portion 25a. These partition portions 26 have a rib shape. Specifically, one end of each partition part 26 is integrally connected to the downstream end face 21b of the fitting part 21a of the anti-vibration rubber 21, and the other end of each partition part 26 is integrated to the inner surface of the peripheral part of the second guide part 25b. It is continuous. Accordingly, each partition portion 26 has a length protruding in the direction from the rear end of the peripheral wall of the fan cover 17 and is formed in a rib shape extending in parallel with the central axis of the electric blower 8. The part 25 is supported from the inside.

  Each partition portion 26 is disposed in contact with the peripheral wall portion 17b (see FIG. 5) between the exhaust holes 18 adjacent in the circumferential direction of the fan cover 17 so as to partition between the adjacent exhaust holes 18. As shown in FIG. 4, the downstream end surface 21 b of the fitting portion 21 a and one side surface 26 a of each partition portion 26 are continuous with the circular arc surface 27 without forming an angle therebetween. Here, the one side surface 26 a indicates a side surface that receives air (airflow) discharged from the exhaust hole 18.

  The electric blower 8 is supported in an anti-vibration manner in the cleaner body 2 via anti-vibration rubbers 21 and 23. That is, as shown in FIG. 2, between the blower support portion 4 and the fan cover 17 of the cleaner body 2, the vibration-proof rubber 21 fitted with the fan cover 17 and provided with the guide 25 is sandwiched between The blower portion 15 of the blower 8 is supported on the cleaner body 2 in an anti-vibration manner, and the bearing housing portion 12b of the motor case 12 is interposed between the motor portion support portion 5 of the cleaner body 2 and the bearing housing portion 12b. The electric motor unit 11 of the electric blower 8 is supported by the cleaner body 2 in an anti-vibration manner with the anti-vibration rubber 23 fitted to the vacuum cleaner 8 interposed therebetween.

  Further, the anti-vibration rubber 21 on the upstream side (front side) hermetically seals the front end portion of the blower chamber S, and the anti-vibration rubber 23 on the downstream side (rear side) seals the rear end portion of the blower chamber S in an airtight manner. It is sealed. The electric blower 8 supported by the cleaner body 2 is disposed so that the central axis thereof is horizontal, and the intake port 17a of the electric blower 8 is in the front, that is, in the dust collecting chamber of the cleaner body 2. It is open toward.

  In such a support state, the second guide portion 25 b included in the guide 25 integrated with the vibration isolating rubber 21 is supported in contact with the guide support portion 6. Therefore, the second guide portion 25b is prevented from being deformed by the pressure of the air passing through the air passage P and the pressure fluctuation of the air passing through the air passage P accompanying the switching of the operation mode of the electric blower 8, and the air passage It is possible to keep the air passage cross-sectional area of the second air passage portion of P constant, and to smoothly distribute the air flowing out from the exhaust hole 18 to the air passage P.

  In addition, a control circuit (not shown) for controlling the operation of the electric blower 8 described later and a cord reel device (not shown) are incorporated in the rear portion of the cleaner body 2 and outside the blower chamber S. The cord reel device winds up a power cord, and the power cord can be supplied to the electric vacuum cleaner 1 by drawing it out of the vacuum cleaner body 2 and connecting it to an outlet (not shown). Instead of such an external power source, an internal power source, that is, a secondary battery built in the vacuum cleaner body 2 can be used as the power source of the vacuum cleaner 1.

  As shown in FIG. 1, the cleaner body 2 has a dust suction port 31. The dust suction port 31 is provided, for example, on the front surface of the cleaner body 2. A dust collection filter 33 is detachably attached to the cleaner body 2. The dust collection filter 33 includes a dust collection bag accommodated in the dust collection chamber of the cleaner body 2. In a state where the dust collection filter 33 is accommodated in the dust collection chamber, the inner space of the dust collection filter 33 is communicated with the dust suction port 31. The dust collecting filter 33 can be taken in and out of the dust collecting chamber with the dust collecting chamber lid 3 being opened.

  As shown in FIG. 1, the dust suction hose 35 includes a flexible hose body 35a, a connecting pipe portion 35b attached to one end of the hose body 35a and communicated with the hose body 35a, and a hose body 35a. It has a hand operating part 35c attached to the other end and communicated with the hose body 35a. The dust suction hose 35 is detachably inserted into the dust suction port 31 with the connecting pipe portion 35 b connected to the cleaner body 2 and communicated with the dust suction port 31.

  The hand operating section 35c has a handle 35d that is gripped by a cleaning operator in order to move and operate the floor suction port body 9. The handle 35d is provided with an input means 36 for giving an operation command to a control device (not shown). The input means 36 is formed of an operation panel having a plurality of touch type input buttons. The electric blower 8 is operated in the operation mode designated by the input button.

  The extension tube 38 is formed such that its length can be adjusted. One end portion of the extension pipe 38 is detachably fitted to and connected to the distal end portion of the hand operation portion 35c. The connected extension pipe 38 and the dust suction hose 35 communicate with each other.

  The dust suction hose 35 and the extension pipe 38 form a dust suction pipe that communicates the dust collection chamber of the cleaner body 2 and the floor suction port 39. A floor suction port 39 is detachably fitted and connected to the tip of the dust suction tube, for example, the tip of the extension tube 38.

  The floor suction port 39 is suitable for cleaning the floor surface to be cleaned, and has a suction opening (not shown) on its lower surface. A rotating cleaning body (not shown) and an electric motor for rotating the cleaning body are mounted in the floor suction port body 39.

  The electric blower 8 of the electric vacuum cleaner 1 is driven in an operation mode designated by an input operation at the input means 36, and sucks air from an upstream dust collection chamber or the like into the electric blower 8. With this suction force, dust and air on the floor to be cleaned are sucked into the floor suction port 39 and further guided to the dust collection chamber of the cleaner body 2 via the extension pipe 38 and the dust suction hose 35. For this reason, the dust in the dust-containing airflow is filtered by the dust collecting filter 33 in the dust collecting chamber and accumulated in the dust collecting filter 33. On the other hand, the air separated from the dust and passing through the dust collecting filter 33 is sucked into the electric blower 8 through the dust collecting chamber, and after passing through the electric blower 8 as will be described later, from the blower chamber S to the vacuum cleaner. It passes through the exhaust part (not shown) of the main body 2 and is discharged out of the cleaner main body 2. Therefore, the floor to be cleaned can be cleaned.

  Next, the airflow passing through the electric blower 8 will be described.

  Air sucked through the air inlet 17 a of the fan cover 17 by the rotation of the fan 16 is discharged from the outer periphery of the fan 16. The air thus discharged swirls along the inner periphery of the fan cover 17, and some of the air flows out from the exhaust holes 18 of the fan cover 17 to the outside of the electric blower 8. On the other hand, the remaining air is guided into the motor case 12 while being statically pressured by a diffuser, and flows through the motor case 12 while cooling the stator 11a and the rotor 11b in the motor case 12, and this motor case It flows out into the blower chamber S in which the electric blower 8 is accommodated through the 12 exhaust ports 12a.

  As described above, a part of the air before being discharged from the fan 16 and flowing into the electric motor unit 11 flows out through the exhaust hole 18 of the fan cover 17. This air does not pass through the electric motor unit 11 having a large flow path resistance. Thereby, the pressure loss in the electric blower 8 is reduced, and the efficiency of the electric blower 8 is increased accordingly, and the suction performance of the vacuum cleaner 1 can be improved.

  The air passing through the exhaust hole 18 is directed in the flow direction by the air passage P formed by the guide 25 and flows out to the blower chamber S through the outlet PD of the air passage P. In this case, the air flowing through the air path P is directed so as to flow along the outer surface of the overhanging edge portion 12 e of the electric motor case 12, and is blown against the outer surface of the cylindrical portion of the electric motor case 12. The air before passing through the electric motor unit 11 is at a lower temperature than the air flowing through the electric motor unit 11. Thereby, the overhang | projection edge part 12e and cylindrical part of the motor case 12 can be cooled with the low temperature air before passing the motor part 11. FIG.

  Accordingly, the amount of air flowing through the motor unit 11 is reduced in accordance with the amount of air discharged from the exhaust hole 18, so that the performance of air cooling the motor unit 11 from the inside is lowered, but the outside air cooling is performed. Therefore, it is possible to suppress the temperature rise of the stator 11a and the like in the electric motor unit 11.

  In this case, as described above, the guide 25 has a plurality of partition portions 26 protruding from the inner surface of the first guide portion 25 a, and these partition portions 26 are exhaust holes adjacent to the fan cover 17 in the circumferential direction. The peripheral wall part 17b between 18 is in contact. Therefore, one side surface 26 a of the partition portion 26 receives air that has flowed out to the first air passage portion of the air passage P through the exhaust hole 18 according to the rotation of the fan 16, and this air extends in the circumferential direction of the fan cover 17. Hinder continued turning along. At the same time, each partition 26 guides the air received by the partition 26 to the second air passage portion of the air passage P. As a result, the air passing through the exhaust hole 18 is rectified and smoothly flows into the air path P, so that the effect of air-cooling the motor unit 11 from the outside can be enhanced.

  In addition, the downstream end surface 21b between the partition portions 26 of the fitting portion 21a of the upstream side anti-vibration rubber 21 and the one side surface 26a of the partition portion 26 that receives the air discharged from the exhaust hole 18 are arcuate surfaces. 27 is continued. As a result, the air received by the partition portion 26 is less likely to vortex at the portion sandwiched between the downstream end surface 21b and the one side surface 26a, and accordingly, the air discharged from the exhaust hole 18 can be more smoothly blown. Since it is possible to guide to the second air path part of the path P, it is possible to further enhance the effect of air-cooling the motor unit 11 from the outside in this respect.

  The guide 25 is made of a sound absorbing material and has a first guide portion 25a that covers the fan cover 17 from above. For this reason, the wind noise of the fan 16 that has passed through the exhaust hole 18 in the upper part of the fan cover 17 is suppressed from being propagated upward of the cleaner body 2 as the first guide portion 25a absorbs the wind noise. Is possible. Thereby, the wind noise which is annoying for the cleaning worker is reduced. In addition, since the guide 25 covers the entire circumference of the fan cover 17, it is possible to suppress propagation of wind noise by the fan 16 to the outside of the cleaner body 2.

  Further, as described above, the air that has passed through the exhaust hole 18 is rectified and flows into the air path P, and it is difficult to generate vortices, so that it is possible to suppress the generation of sound accompanied by the generation of vortices. And even if it is a case where a sound arises because of a vortex, it can be suppressed with the guide 25 made from a sound-absorbing material that this sound propagates above the cleaner body 2.

  Therefore, for these reasons, the cleaning using the electric vacuum cleaner 1 of the first embodiment can be performed with low noise.

  As described above, according to the vacuum cleaner of the first embodiment, it is possible to improve the cooling effect on the electric motor part of the electric blower 8 while maintaining high suction performance, and to reduce the fan 16 of the electric blower 8. As a sound source, it is possible to reduce the sound that escapes upward from the cleaner body 2.

  In order to prevent the exhaust holes 18 of the fan cover 17 from being blocked by the fitting portions 21 a of the fan cover 17, the fan cover 17 of the anti-vibration rubber 23 that supports the blower 15 to the cleaner body 2 in an anti-vibration manner. The fitting depth D is shallow. Thereby, in the structure where the guide 25 is not integral with the fitting part 21a, the fitting state of the anti-vibration rubber 23 becomes unstable, and the anti-vibration performance of the anti-vibration rubber 23 may be lowered.

  On the other hand, as described above, the guide 25 is not only integrally connected to the fitting portion 21a of the anti-vibration rubber 23, but the plurality of partition portions 26 included in the guide 25 are provided on the fan cover 17. The peripheral wall is in contact with the outer surface, more specifically, the peripheral wall portion 17b between the adjacent exhaust holes 18. For this reason, the fitting depth of the anti-vibration rubber 23 having the guide 25 integrally with the fan cover 17 is increased by the respective partition portions 26, and the fitting state of the anti-vibration rubber 23 can be stabilized. It is possible to improve the vibration isolation performance of the rubber 23.

  Since the guide 25 is formed integrally with the vibration isolating rubber 21 as described above, the number of parts and the number of assembly steps are not increased, and the guide 25 is compared with the case where the guide 25 is separate from the vibration isolating rubber 21. Thus, the cost can be reduced.

  FIG. 7 shows a second embodiment. The second embodiment is different from the first embodiment in the configuration described below, and the other configurations are the same as those in the first embodiment. For this reason, about the structure of 2nd Embodiment which show | plays the same or same function as 1st Embodiment, the code | symbol same as 1st Embodiment is attached | subjected and the description is abbreviate | omitted.

  In the electric vacuum cleaner of the second embodiment, the vibration isolating rubber 21 and the guide 25 integrated with the anti-vibration rubber 21 are not configured to cover the entire periphery of the fan cover 17, but the guide 25 is arranged in an electric blower 8 disposed horizontally. In other words, with respect to the fan cover 17 of the electric blower 8 arranged so that the central axis is horizontal, only the upper part of the fan cover 17 is provided from above. Here, the area where the guide 25 covers the fan cover 17 from above, in other words, the area covered by the fan cover 17 from above, may be narrower or wider than the second embodiment along the circumferential direction of the fan cover 17. There is no problem. At the same time, the guide 25 is preferably large enough to cover the upper half of the fan cover 17 from above. In addition, both ends of the guide 25 along the circumferential direction of the fan cover 17 are closed by an end wall 25c including a first end wall portion in contact with the outer surface of the fan cover 17 and a second end wall portion continuous thereto. The first end wall portion of the end wall 25c also serves as a partition portion.

  The vacuum cleaner of 2nd Embodiment is the same as 1st Embodiment including the structure which is not shown in figure except the matter demonstrated above. Therefore, also in this 2nd Embodiment, the said subject is solved, it is possible to improve the cooling effect with respect to the electric motor part of an electric blower, maintaining high suction performance, and cleaning with the fan of an electric blower as a sound source. It is possible to reduce the sound that escapes upward from the machine body. Furthermore, in the second embodiment, since the guide 25 covers only the upper portion of the fan cover 17 from above, the anti-vibration rubber 21 integrally formed with the guide 25 can be easily fitted on the fan cover 17. There are advantages you can do.

  In each of the above-described embodiments, the guide 25 is formed integrally with the vibration-proof rubber 21 so that the guide 25 is continuous with the vibration-proof rubber 21, but instead, the guide 25 and the vibration-proof rubber 21 are arranged. It is also possible to arrange the guide 25 so as to be continuous with the anti-vibration rubber 21 in a state where the guide 25 is in contact with or non-contact with the downstream end face 21b of the anti-vibration rubber 21.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner, 2 ... Vacuum cleaner main body, 8 ... Electric blower, 11 ... Electric motor part, 12 ... Electric motor case, 12a ... Exhaust port of motor case, 15 ... Air blower, 16 ... Fan, 17 ... Fan cover, 17b A peripheral wall portion of the fan cover, 18 ... an exhaust hole of the fan cover, 21 ... an anti-vibration rubber, 21b ... an end face on the downstream side of the anti-vibration rubber, 23 ... an anti-vibration rubber, 25 ... a guide, 25a ... a first guide part, 25b ... 2nd guide part, P ... Airway, PD ... Exit of airway, 26 ... Partition part, 26a ... One side of partition part, 27 ... Arc surface

Claims (3)

A fan, a blower unit having a plurality of exhaust holes for discharging a part of the air sucked by the fan and covering the fan, and a fan part rotating the fan and communicating with the inside of the fan cover An electric blower including an electric motor case, and the electric motor case having an electric motor part having an exhaust port for discharging the air sucked by the fan is disposed so that a central axis of the electric blower is horizontal and cleaned. In a vacuum cleaner supported in a vibration-proof manner in the machine body,
A guide made of a sound-absorbing material, which is integrally provided so as to be continuous with the vibration-proof rubber fitted on the fan cover, and forms an air passage for guiding the air discharged from the exhaust hole with the outer surface of the electric blower A first guide portion that covers the fan cover from above, facing the exhaust hole, and is bent from the first guide portion toward the outer peripheral surface of the motor case by the first guide portion. A second guide portion that guides the guided air so as to blow against the outer peripheral surface and that forms an outlet of the air passage between the outer peripheral surface and the inner surface of the first guide portion toward the fan cover. And a plurality of partition portions projecting from the electric vacuum cleaner . Vacuum cleaner according to claim 1, characterized in that front Kitsukamatsu cutting portion is in contact with the peripheral wall portion between the exhaust hole adjacent to the circumferential direction of the fan cover. The electric vacuum cleaner according to claim 2 , wherein a downstream end face of the anti-vibration rubber and one side face of the partition part that receives air discharged from the exhaust hole are continuous with an arc surface.

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