JP2010029259A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner wherein the vibration transmission of a motor-driven blower to the vacuum cleaner is suppressed, the decline of a suction performance due to air leakage or the like hardly occurs, and a highly safe motor-driven blower is used. <P>SOLUTION: The motor-driven blower 1 has a motor, an impeller 4 fixed to a shaft of the motor and rotationally driven, and a fan case 5 having a suction port 7 and covering the impeller, and a deflector portion 21 having an inclined part from the outside of the machine to the entrance part of the impeller and a suction air guide portion 22 composed of a surface continuously changing from the deflector portion to guide flow to the entrance part of the impeller which are configured by one component near the suction port of the fan case, and they are integrally molded in the fan case. A soft member 15 of a diameter smaller than the outer diameter of the fan case is mounted on a circular groove part formed of the deflector portion and the suction air guide part, and it is stored in a cleaner body 14. Thus, the vacuum cleaner of low noise, wherein the vibration transmission of the motor-driven blower is suppressed, is obtained. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner using an electric blower.

  Conventionally, this type of electric blower for electric vacuum cleaners and electric vacuum cleaners are as shown in FIG. 4 (see, for example, Patent Document 1).

  FIG. 4 shows a cross-sectional view of the peripheral structure of a conventional electric blower. As shown in FIG. 4, the bracket 9 includes a stator 2 and a rotor 3 that rotates at a high speed. The impeller 4 is fixed to a rotating shaft 6 of the rotor 3 and rotates together with the rotor 3. A fan case 5 that regulates the airflow discharged from the impeller 4 is located in front of the impeller 4 and has a suction port 7 in the center.

  The intake guide 8 is welded and fixed to the fan case 5 with a welding boss 16. The exhaust port 12 is provided in the bracket 9. The electric blower 1 is comprised by the above.

  In the electric blower 1, the outer periphery of the intake guide 8 is held by the main body 14 via the soft member 15. Furthermore, the outer periphery of the electric blower 1 is configured to be entirely covered by the motor case 13.

  Next, operation in the above configuration will be described.

  In FIG. 4, when a voltage is applied to the electric blower 1, a current flows through a winding (not shown) constituting the stator 2 to generate a magnetic flux for rotating the rotor 3. The rotor 3 rotates by interlinking with a line (not shown), and the impeller 4 fixed to the rotor 3 rotates at a high speed.

  Then, the air is sucked in through the intake guide 8 by the impeller 4, cools the winding of the rotor 3 and the stator 2, and then is discharged from the exhaust port 12 formed below the bracket 9.

  Here, there is a residual unbalance between the rotor 3 and the impeller 4, and therefore vibration occurs when the rotor 3 and the impeller 4 rotate at a high speed and is transmitted to the fan case 5 and the bracket 9 through the rotating shaft 6. 1 swings around the center of gravity of the rotor 3, so that the vibration near the center of the fan case 5 is reduced.

Therefore, in the conventional example, the front of the electric blower 1 in the cleaner main body is held by the air intake guide 8 which is welded and fixed to the fan case 5, thereby reducing vibration transmission and suppressing noise.
Japanese Patent Laid-Open No. 3-18242

  However, in the conventional configuration, since the intake guide 8 is fixed to the fan case 5 by welding, if a strong impact is continuously applied when the vacuum cleaner is used, the welded portion is destroyed and looseness occurs. There was a problem that could lead to air leakage.

  The present invention solves the above-described conventional problems, inherits the effect of suppressing vibration transmission of the electric blower to the vacuum cleaner, further improves the effect, and reduces the suction performance due to air leakage and the like. An object of the present invention is to provide an electric vacuum cleaner using an electric blower having high safety.

  In order to solve the above-described conventional problems, an electric blower of a vacuum cleaner according to the present invention includes an electric motor, an impeller fixed to a shaft of the electric motor and driven to rotate, and a fan that covers the impeller while having a suction port. Near the suction opening of the case and the fan case is composed of a rectifying plate portion having an inclined portion from the outside of the machine toward the impeller inlet portion, and a surface continuously changing from the rectifying plate portion, and flows to the impeller inlet portion. An air blower comprising an air intake guide portion that guides the air in a single part and integrally formed in the fan case, wherein the fan case is formed in a circular groove formed by the rectifying plate portion and the air intake guide portion. A soft member having a diameter smaller than the outer diameter is attached and stored in the cleaner body so as to hold the member.

  As a result, the air intake guide and the fan case have high adhesion, play and air leakage are suppressed, and the soft member is also sandwiched between the air intake guide and the rectifying plate, so there is no risk of detachment or air leakage. In addition, since the vacuum cleaner is held at a diameter smaller than the outer diameter of the fan case, a low-noise vacuum cleaner that suppresses vibration transmission of the electric blower is obtained.

  The vacuum cleaner of the present invention can suppress transmission of vibration of the electric blower to the vacuum cleaner, and can make it difficult for the suction performance to decrease due to air leakage or the like.

  According to a first aspect of the present invention, there is provided an electric motor, an impeller fixed to the shaft of the electric motor and driven to rotate, a suction port, a fan case that covers the impeller, and a suction port of the fan case near the suction port. The airflow guide part having an inclined part from the airflow guide part toward the impeller inlet part, and the intake guide part that guides the flow to the impeller inlet part, are composed of one part, and are composed of one part An electric blower integrally formed in the fan case, wherein a soft member having a diameter smaller than the outer diameter of the fan case is attached to a circular groove formed by the rectifying plate portion and the intake guide portion. By storing in the vacuum cleaner main body so as to hold the member, the intake guide and fan case have high adhesion, rattling and air leakage can be suppressed, and the soft member also has the intake guide and rectifying plate part Because it is pinched, there is no risk of detachment or air leakage, and since it is held in the vacuum cleaner with a diameter smaller than the outer diameter of the fan case, the vibration transmission of the electric blower is suppressed and low noise A vacuum cleaner is obtained.

  In the second invention, in particular, a soft member having a lower hardness or rebound resilience than the other part is arranged at a portion that contacts the circular groove formed by the rectifying plate portion and the intake guide portion of the first invention. Since it was installed, vibration transmission from the electric blower is suppressed, and a vacuum cleaner with lower noise can be obtained.

  In particular, the third invention has one or more substantially disk-like shapes from the bottom surface (small diameter portion) of the circular groove portion formed by the rectifying plate portion and the intake guide portion of the first invention toward the outer periphery. Since a rib is provided and a soft member is mounted so that it abuts at its tip and stored in the cleaner body, the radial contact area between the electric blower and the soft member is small, and vibration transmission from the electric blower is suppressed. A noise vacuum cleaner is obtained.

  In the fourth aspect of the invention, in particular, since the tips of the plurality of substantially disc-shaped ribs of the third aspect of the invention are acutely angled so as to reduce the contact area with the soft member, a vacuum cleaner with lower noise can be obtained. .

  In the fifth invention, in particular, one or a plurality of ribs for holding the soft member configured on the cleaner body side of the third or fourth invention are formed in a substantially disk shape, and the axial positions of the electric motors are formed. And the position of one or a plurality of substantially disc-shaped ribs formed from the bottom surface (small diameter portion) of the circular groove portion formed by the rectifying plate portion and the intake guide portion on the electric blower side toward the outer periphery is soft. Since the members are arranged so as not to coincide with each other, vibration transmission from the electric blower is eased, and a vacuum cleaner with lower noise can be obtained.

  In the sixth invention, in particular, the rectifying plate portion according to any one of the first to fifth inventions is provided on a partition wall between the dust collecting chamber of the cleaner body and the electric blower chamber storing the electric blower. By projecting into the dead space formed by cylindrical ribs, the flow of airflow from the vacuum cleaner dust collection part can be made smoother, and the electricity with low noise and high air performance A vacuum cleaner can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of the peripheral structure of the electric blower of the electric vacuum cleaner according to the first embodiment of the present invention, and shows that the electric blower 1 and the electric blower are incorporated and held in the electric vacuum cleaner. ing.

  The same components as those in the conventional example are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 1, the fan case 5 covers the impeller 4 and the air guide 11 of the electric blower 1, and a resin guide 20 is insert-molded in the fan case 5 in the vicinity of the suction port 7. The resin guide 20 is roughly divided into two parts for each role (separated by a broken line in the figure).

  One is a rectifying plate portion 21 that gradually inclines toward the suction port 7 and adjusts the turbulence of the airflow entering the electric blower 1, and the other is a surface that is continuous with the rectifying plate portion, and the entrance of the impeller 4. This is an intake guide portion 22 that guides the airflow into the impeller 4 while contacting the portion.

  The soft member 15 is interposed between the electric blower 1 and the cleaner main body 14 and is fitted into the annular groove portion of the resin guide 20 and fixed.

  Further, the outer diameter of the soft member 15 is set smaller than the outer diameter of the fan case 5. The motor case 13 is a case that encloses the electric blower 1 and is configured to be incorporated in the main body 14 of the vacuum cleaner as the above unit.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When a voltage is applied to the electric blower 1, the impeller 4 rotates at a high speed, so that air flows in from the front of the cleaner body 14, and the rectifying plate portion 21, the intake guide portion 22, the impeller 4, and the air guide of the resin guide 20. 11, the air flows into the electric blower 1, cools the rotor 3, the stator 2, etc., and is discharged from the exhaust port 12.

  Due to the residual unbalance between the impeller 4 and the rotor 3 (FIG. 4) due to the rotation of the electric blower 1, the vibration of the electric blower 1 transmits the soft member 15 from the resin guide 20 that supports it, and the vacuum cleaner main body 14 Try to be communicated to.

At that time, since the diameter of the soft member 15 is set to be smaller than the diameter of the fan case 5, the touch of the electric blower 1 is small and the portion is connected to the main body 14, so that vibration is hardly transmitted.

  Further, since the soft member 15 is fitted in the annular groove of the resin guide 20, even if the vacuum cleaner main body 14 is dropped in a stand state or a large vibration is repeatedly applied from the outside, for example, the soft member 15 and the fan The contact part (air tight part) of the case 5 is not separated, and air leakage does not occur and does not come off.

  Further, since the resin guide 20 is insert-molded in the fan case 5, the coaxial accuracy of the suction port 7 is easily obtained as compared with the conventional welding fixing, and the welding may be broken and air leakage may occur. rare.

  Therefore, the suction performance is stable. Furthermore, since the airflow guide portion 21 and the intake guide portion 22 are formed from a single, smooth, continuous surface, the fluid loss at the connecting portion is reduced as compared to the case where both of them are commonly used in recent years. Is done.

  As described above, in the present embodiment, while suppressing vibration transmission of the electric blower 1 as in the conventional example, the sealing between the soft member and the electric blower 1 is improved, and further, the resin guide 20 and the fan are improved. By increasing the degree of adhesion of the case 5, it is possible to realize a vacuum cleaner that has low noise, improved suction performance, stability of suction performance, and safety.

(Embodiment 2)
FIG. 2: shows sectional drawing of the electric blower periphery structure of the vacuum cleaner in the 2nd Embodiment of this invention, and represents a mode that the electric blower 1 and it is built and hold | maintained in a vacuum cleaner. ing.

  The same components as those in the conventional example are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 2, the vibration isolator 30 has a lower hardness and a lower resilience than the soft member 15, and the conventional soft member 15 is disposed on the outer periphery thereof. Further, a slight gap is provided between the conventional soft member 15 and the resin guide 30 and the fan case 5 so that the radial vibration of the fan case 5 is not easily transmitted directly to the soft member 15.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When a voltage is applied to the electric blower 1, the impeller 4 rotates at a high speed, so that air flows in from the front of the cleaner body 14, and the rectifying plate portion 21, the intake guide portion 22, the impeller 4, and the air guide of the resin guide 20. 11, the air flows into the electric blower 1, cools the rotor 3, the stator 2, etc., and is discharged from the exhaust port 12.

  Due to the rotation of the electric blower 1, the vibration of the electric blower 1 is transmitted from the resin guide 20 that supports the soft member 15 due to the residual unbalance between the impeller 4 and the rotor 3, and tries to be transmitted to the cleaner main body 14. . At that time, it is the vibration isolator 30 that is mainly in contact with the resin guide 20, and is in contact with the portion of the electric blower 1 as close as possible to the vibration of the electric blower 1. Difficult to communicate.

  As described above, in the present embodiment, it is possible to realize a vacuum cleaner with less noise that suppresses vibration transmission of the electric blower 1.

(Embodiment 3)
FIG. 3: shows sectional drawing of the electric blower periphery structure of the vacuum cleaner in the 3rd Embodiment of this invention, and represents a mode that the electric blower 1 and it is built and hold | maintained in a vacuum cleaner. ing.

  The same components as those in the conventional example are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 3, a substantially disc-shaped rib 40 is formed on the bottom surface of the annular groove portion of the resin guide 20. The tip shape is sharp at an acute angle. Furthermore, the position of the rib 40 on the disc is arranged at a distance of L1 and L2 so that the positions of the two receiving ribs 41 that support the radial direction provided in the cleaner body 14 and the rib center position do not coincide. Has been.

  Further, the rectifying plate portion 21 of the resin guide 20 protrudes into a space formed by the substantially cylindrical rib 42 that supports the thrust direction of the cleaner body 14, and forms a long inclined surface. The rectifying plate portion 21 is arranged without being in contact with the cleaner body 14.

  About the vacuum cleaner comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When a voltage is applied to the electric blower 1, the impeller 4 rotates at a high speed, so that air flows in from the front of the cleaner body 14, and the rectifying plate portion 21, the intake guide portion 22, the impeller 4, and the air guide of the resin guide 20. 11, the air flows into the electric blower 1, cools the rotor 3, the stator 2, etc., and is discharged from the exhaust port 12.

  Due to the rotation of the electric blower 1, the vibration of the electric blower 1 is transmitted from the resin guide 20 that supports the soft member 15 due to the residual unbalance between the impeller 4 and the rotor 3, and tries to be transmitted to the cleaner main body 14. . At that time, the disc upper rib 40 provided in the resin guide 20 sandwiching the soft member 15 contacts and supports the soft member 15 in a small area.

  Furthermore, a gap is provided in the other part, and in the radial direction, the structure is supported only at the tip of the disc upper rib 40 as much as possible, so that it is difficult to transmit the vibration of the electric blower 1. Further, since the ribs 40 on the disk and the receiving ribs 41 of the cleaner main body 14 are arranged so that their positions do not coincide with each other, vibrations are less easily transmitted between the ribs.

  Further, since the rectifying plate portion 21 protrudes to the dead space of the substantially cylindrical rib of the main body 14 and has a longer inclined surface, there is little loss due to fluid stagnation in the dead space, and the suction port is smoothly Therefore, the air performance is improved.

  As described above, in the present embodiment, it is possible to realize a vacuum cleaner having high suction performance while suppressing vibration transmission of the electric blower 1.

  As described above, since the electric blower according to the present invention and the vacuum cleaner using the electric blower can improve the suction work rate of the vacuum cleaner and reduce the noise, household electrical appliances using the electric blower, industrial equipment It can be applied to a wide range of applications.

Sectional drawing of electric blower periphery structure of the vacuum cleaner in Embodiment 1 of this invention Sectional drawing of the electric blower periphery structure of the vacuum cleaner in Embodiment 2 of this invention Sectional drawing of the electric blower periphery structure of the vacuum cleaner in Embodiment 3 of this invention Sectional view of the peripheral structure of a conventional electric blower

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric blower 2 Stator 3 Rotor 4 Impeller 5 Fan case 6 Rotating shaft 7 Suction port 8 Intake guide 9 Bracket 10 Bearing 11 Air guide 12 Exhaust port 13 Motor case 14 Vacuum cleaner main body 15 Soft member 16 Welding boss 20 Resin guide 21 Current plate Part 22 Intake guide part 30 Anti-vibration material 40 Substrate upper rib 41 Receiving rib 42 Substantially cylindrical rib

Claims (6)

An electric motor, an impeller fixed to the shaft of the electric motor and driven to rotate, and a fan case that covers the impeller, and in the vicinity of the suction port of the fan case, from the outside to the impeller inlet portion. The airflow guide part that has an inclined part and the surface that continuously changes from the current flow control part, and the intake guide part that guides the flow to the impeller inlet part are configured as a single part, and these are integrally molded in the fan case In the electric blower, a soft member having a diameter smaller than the outer diameter of the fan case is attached to a circular groove formed by the rectifying plate portion and the intake guide portion so as to hold the member. A vacuum cleaner stored in the main body of the vacuum cleaner. The electric vacuum cleaner according to claim 1, wherein a soft member having a hardness or a rebound resilience lower than that of the other portion is disposed in a portion that abuts on the circular groove formed by the rectifying plate portion and the intake guide portion. A soft member that is provided with one or a plurality of substantially disc-shaped ribs from the bottom surface (small diameter portion) of the circular groove portion formed by the rectifying plate portion and the intake guide portion toward the outer periphery, and abuts at the tip thereof. The vacuum cleaner according to claim 1, wherein the vacuum cleaner is mounted and stored in the vacuum cleaner body. The electric vacuum cleaner according to claim 3, wherein the tips of the plurality of substantially disc-shaped ribs have an acute angle so that a contact area with the soft member is reduced. One or more ribs that hold the soft member that is configured on the vacuum cleaner body side are formed in a substantially disk shape, and are formed by the axial position of the electric motor, the rectifying plate portion on the electric blower side, and the intake guide portion 4 or 3, wherein the position of one or a plurality of substantially disc-shaped ribs formed from the bottom surface (small diameter portion) of the circular groove portion to the outer periphery is not aligned across the soft member. 4. The vacuum cleaner according to 4. The rectifying plate portion protrudes into a dead space formed by a cylindrical rib provided on a partition wall between a dust collecting chamber of the cleaner body and an electric blower chamber storing the electric blower. The electric vacuum cleaner according to any one of 5.

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