JP6349547B2 - Suction tool and electric vacuum cleaner using the same - Google Patents

Description

  The present invention relates to a suction tool provided with a cooling means for a motor and a vacuum cleaner using the suction tool.

  Conventionally, the cooling means for this type of suction tool includes a lower case having an upper case and a suction passage, and a connecting pipe having a first inlet and a first outlet connected to the suction passage of the lower case. A motor that drives the rotating brush, a cooling air cooling port that cools the motor, and a sub-suction port.The connection pipe is rotatably held between the upper case and the lower case, and the sub-suction port is rotated around the connection pipe. It arrange | positions at the moving shaft (for example, refer patent document 1).

JP 63-305832 A

  However, in the above-described conventional configuration, the cooling airflow normally flows from the ventilation port provided with a breathable dustproof packing for the purpose of intrusion of dust, and then passes through the motor to the connection pipe from the sub suction port. Since the air flows out, the ventilation resistance of the cooling passage is often relatively high, and this tendency is further increased with the recent miniaturization.

  On the other hand, since the airflow resistance of the suction airflow flowing through the connection pipe is relatively low, the airflow resistance of the cooling airflow flowing through the auxiliary suction port is larger than the airflow resistance of the suction airflow flowing through the connection pipe. Since it was sucked from the inflow port, there was a problem that high cooling performance could not be obtained.

  The present invention solves the above-mentioned conventional problems, and along with the recent trend toward miniaturization and weight reduction, the adoption of a small and lightweight motor that tends to generate heat in the suction tool, and the small and It aims at providing the suction tool which improved reliability by exhibiting sufficient cooling performance also at the time of lightweight electric blower adoption, and a vacuum cleaner using the same.

In order to solve the above-described conventional problems, the suction tool of the present invention includes a suction tool body that sucks dust, an upper case that has a ventilation port and forms an upper part of the suction tool body, a dust collection chamber, and a suction port. A lower case forming the lower part of the suction tool body, a connection pipe provided at the rear part of the suction tool body having a first inlet and a first outlet, and provided in the dust collection chamber A rotating brush, a motor disposed between the upper case and the lower case, for driving the rotating brush, and a branching means for branching the first inflow port into a main suction port and a sub suction port, The branching means is a suction port member that is provided in the lower case and allows the suction port and the first inlet to communicate with each other. The suction port member has a partition, and the first inlet is connected to the main suction port by the partition. with branches to the sub-suction port, the main suction port is communicated with the suction opening The one in which the secondary inlet and communicates with the vent.

As a result, the first inlet serving as a suction port for the suction air flow of the connecting pipe is branched into the main suction port and the sub suction port, the main suction port is communicated with the suction port, and the sub suction port is connected to the upper case and the lower case. Since all the suction airflows that flow to the suction port are sucked from the main suction port with the sub-suction port reduced and the opening area is reduced. While only the intake airflow will be forcibly reduced, the reduced intake airflow will be actively sucked into the sub-inlet through the ventilation port, and high cooling performance will be obtained for the motor. In addition, the dust collection performance and cooling performance can be adjusted by adjusting the branch distribution ratio.
In addition, the suction port member is disposed in the lower case in a state where the suction port and the first inlet port are in communication, and the first inlet port is reliably branched into the main suction port and the sub suction port by the partition of the suction port member It can be made to.

  The suction tool of the present invention can improve the reliability by improving the cooling performance of the motor of the suction tool, and can mount a small and lightweight motor on the suction tool and a small and lightweight electric blower on the vacuum cleaner body. The suction tool and the vacuum cleaner main body can be reduced in size and weight.

The external appearance perspective view of the vacuum cleaner in the 1st Embodiment of this invention External perspective view of the vacuum cleaner suction tool viewed from above External perspective view of suction tool of vacuum cleaner as seen from below Central cross-sectional view of the vacuum cleaner suction tool External perspective view of the vacuum cleaner with the upper case removed as seen from above AA sectional view of FIG. 4 showing the suction tool of the vacuum cleaner BB sectional view of FIG. 6 showing the suction tool of the vacuum cleaner

A first invention includes a suction tool main body for sucking dust, an upper case having a ventilation port and forming an upper part of the suction tool main body, a dust collection chamber and a suction port, and a lower part of the suction tool main body. A lower case to be formed; a connecting pipe provided at a rear portion of the suction tool body having a first inlet and a first outlet; a rotating brush provided in the dust collecting chamber; the upper case and the lower case Between the motor that drives the rotating brush and the first inlet is divided into a main suction port and a sub suction port
And the branching means is a suction port member that is provided in the lower case and allows the suction port and the first inlet to communicate with each other. The suction port member has a partition wall, and the partition wall includes the first flow channel. The inlet is branched into a main suction port and a sub suction port, the main suction port is communicated with the suction port, and the sub suction port is communicated with the ventilation port.

As a result, the first inlet serving as the suction port for the suction airflow of the connecting pipe is branched into the main suction port and the sub suction port, the main suction port is communicated with the suction port, and the sub suction port is connected to the upper case and the lower case. Since all the suction airflows that flow to the suction port are sucked from the main suction port with the sub-suction port reduced and the opening area is reduced. While only the intake airflow will be forcibly reduced, the reduced intake airflow will be actively sucked into the sub-inlet through the ventilation port, and high cooling performance will be obtained for the motor. In addition, the dust collection performance and cooling performance can be adjusted by adjusting the branch distribution ratio.
In addition, the suction port member is disposed in the lower case in a state where the suction port and the first inlet port are in communication, and the first inlet port is reliably branched into the main suction port and the sub suction port by the partition of the suction port member It can be made to.

A second invention is, in particular, by the sub suction port of the first invention is arranged to face the first inlet, the outlet portion pressure loss of the cooling air is reduced, the more cooling air sub-inlet It will be sucked into the connecting pipe more smoothly, and the cooling performance can be further improved.

In the third aspect of the invention, in particular, the motor of the first or second aspect of the invention is arranged in the middle of the air passage that flows from the ventilation port to the sub suction port, so that the flow of air flowing from the ventilation port to the sub suction port. Can act as cooling air for the motor.

In the fourth aspect of the invention, in particular, all or part of the auxiliary suction port of any one of the first to third aspects of the invention is disposed closer to the motor side than the center of the first inflow port, thereby shortening the cooling air passage. The pressure loss in the air passage portion of the cooling air due to is reduced, and more cooling air is sucked into the connecting pipe from the auxiliary suction port, so that the cooling performance can be further improved.

In the fifth aspect of the invention, in particular, by reducing the opening area of the auxiliary suction port of any one of the first to fourth aspects to less than half of the opening area of the first inlet port, the suction airflow flowing through the main suction port is halved. As a result, it is possible to ensure the dust collection performance while exhibiting the cooling performance, and it is possible to prevent a significant increase in noise when the suction airflow flows through the main suction port.

In the sixth aspect of the invention, in particular, when the partition wall according to any one of the first to fifth aspects extends to the end face of the first inlet or near the end face, the motor is housed when dust passes through the suction port. It is possible to prevent dust from entering the space between the upper case and the lower case, and to reduce noise when the suction airflow flows through the main suction port due to the rectifying effect.

According to a seventh aspect of the invention, in particular, a vacuum cleaner in which the suction tool according to any one of the first to sixth aspects of the invention is communicated with a vacuum cleaner body incorporating an electric blower that generates suction air. A small and lightweight electric blower can be mounted on the main body, and the vacuum cleaner main body can be reduced in size and weight.

  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)
As shown in FIG. 1, the vacuum cleaner mainly includes a cleaner body 1 containing an electric blower (not shown) that generates suction air, a suction tool 2 that sucks dust on the surface to be cleaned, and one end of the vacuum cleaner. A hose 3 that is detachably connected to the vacuum cleaner body 1, and an extendable or jointable extension tube that has one end detachably connected to the other end of the hose 3 and the other end detachably connected to the suction tool 2. 4. The dust sucked from the surface to be cleaned by the suction tool 2 passes through the extension pipe 4 and the hose 3 and is accumulated in the dust collecting chamber in the cleaner body 1.

  As shown in FIGS. 2 to 4, the suction tool body 7 includes an upper case 11 and a lower case 12, and the upper case 11 and the lower case 12 are located between the upper case 11 and the lower case 12. A buffer member 13 formed of a soft material is sandwiched.

  The lower case 12 has a dust collection chamber 5 extending in the width direction on the lower surface and a suction port 6 in the center, and the suction tool 2 is rotatable to the suction tool body 7 and the rear part of the suction tool body 7. The connecting pipe 10 is attached and has a first inlet 8 and a first outlet 9.

  By connecting the first inlet 8 and the suction port 6 via a suction port member 17 which will be described later, the suction port 6 of the suction tool body 7 and the connection pipe 10 are connected to each other.

  The dust collecting chamber 5 of the suction tool body 7 is provided with a rotating brush 14 that scrapes up dust on the surface to be cleaned, and a motor 15 that rotates the rotating brush 14 and a belt that connects the rotating brush 14 and the motor 15. (Not shown) is provided on the upper portion of the lower case 12.

  A projecting circular first projecting portion 16 is disposed on the front side of the connecting pipe 10 leading to the suction port 6, and the inner diameter of the end of the first projecting portion 16 is a circular first inflow port 8. Is forming.

A suction port member 17 is provided at the upper center of the lower case 12 so as to cover the suction port 6.
The suction port 6 and the first inflow port 8 are communicated with each other.

  A circular second protrusion 18 protruding rearward is disposed at the end of the suction port member 17 on the connection pipe 10 side, and the suction tool main body 7 and the connection pipe 10 are formed as a circular second protrusion. When 18 is fitted to the outside of the circular first protrusion 16 with a slight clearance, the connecting pipe 10 is connected to the suction tool body 7 so as to be rotatable in the left-right direction.

  As shown in FIGS. 2 and 6, the upper case 11 of the suction tool body 7 is provided with a ventilation port 19 that serves as an inlet for cooling air of the motor 15. As shown in FIGS. 5 to 7, the motor 15 has a plurality of second inlets 20 and second outlets 21, and a packing 22 is attached to the outer periphery of the motor 15 by pasting. ing.

  The upper case 11 and the lower case 12 are provided with an upper rib 23 and a lower rib 24 that are clamped around the outer periphery of the packing 22 of the motor 15 so as to maintain airtightness.

  The suction port member 17 has a partition wall 25, and the partition wall 25 branches the first inlet 8 into a main suction port 26 and a sub suction port 27, and the main suction port 26 communicates with the suction port 6. 27 is in communication with the vent 19.

  That is, the sub suction port 27 is formed so as to suck air in a space formed between the upper case 11 and the lower case 12, and the air flowing into the sub suction port 27 is provided in the upper case 11. The air enters through the ventilation opening 19.

  Therefore, since the motor 15 is arranged in the middle of the air path flowing from the ventilation port 19 to the sub suction port 27, the flow of air flowing from the ventilation port 19 to the sub suction port 27 serves as cooling air for the motor 15. The sub suction port 27 is disposed so as to face the first inflow port 8.

  In the present embodiment, the vacuum cleaner main body 1 is provided with a small and lightweight electric blower that generates an open air volume of about 1.5 cubic meters / minute at the maximum in the connecting pipe 10 and has no load rotation speed of about The suction tool main body 7 is provided with a small and light motor capable of generating 17000 rpm, a lock current of about 1 A at stop, and a stop torque of about 50 mN · m.

  Here, the sub suction port 27 of the present embodiment is arranged so that all of the sub suction ports 27 are on the motor 15 side from the perpendicular line to the floor passing through the center of the first inflow port 8 of the connecting pipe 10. In order to set the opening area to be 50% or less with respect to the opening area of the first inlet 8 of the connecting pipe 10, it is set to 175 square millimeters, which is about 25% of about 700 square millimeters, and the partition wall 25 Is extended to the end face of the first protrusion 16 serving as the first inlet 8 or to the vicinity of the end face.

  About the cooling means of the suction tool for electric vacuum cleaners comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the vacuum cleaner is operated and suction is applied, the suction airflow enters from the suction port 6 of the suction tool body 7, passes through the connection pipe 10, and is discharged to the outside through the cleaner body 1.

  Since the outer periphery of the motor 15 is sandwiched between the upper rib 23 and the lower rib 24 so that the packing 22 is kept airtight, the cooling air of the motor 15 that has flowed from the ventilation port 19 passes through the outside of the motor 15. Therefore, most of the cooling air flows into the motor 15 from the plurality of second inflow ports 20, cools the inside of the motor 15, and then is discharged from the plurality of second outflow ports 21 to the outside of the motor 15.

  The first inflow port 8 is branched into a main suction port 26 and a sub suction port 27, the main suction port 26 is communicated with the suction port 6, and the sub suction port 27 is formed between the upper case 11 and the lower case 12. Since all the airflows that naturally flow through the suction port 6 are sucked from the main suction port 26 in which the sub-suction port 27 is disposed and the opening area is reduced. While only the airflow is forcibly reduced, the reduced suction airflow can be positively sucked from the ventilation port 19 toward the sub-suction port 27.

  That is, according to the set opening area of the sub suction port 27, the cooling air of the motor 15 is connected from the sub suction port 27 through the second inlet 20, the inside of the motor 15, and the second outlet 21 from the ventilation port 19. It is possible to actively flow to the pipe 10, and high cooling performance can be obtained for the windings and the like inside the motor 15 that become high temperature. Further, by adjusting the branch distribution ratio, the air volume of the suction airflow flowing through the main suction port 26 and the sub suction port 27 can be adjusted, and the dust collection performance and the cooling performance can be adjusted.

  In addition, since the sub suction port 27 is disposed so as to face the first inflow port 8, the pressure loss at the outlet of the cooling air of the motor 15 is reduced, and more cooling air is more smoothly than the sub suction port 27. It will be attracted | sucked from the connection pipe 10, and cooling performance can be improved further.

  Furthermore, in the present embodiment, all of the sub suction ports 27 are disposed on the motor 15 side with respect to the vertical line perpendicular to the floor surface passing through the center of the first inflow port 8. The air passage pressure loss of the cooling air due to the shortening of the path length is reduced, and more cooling air is sucked into the connecting pipe 10 from the auxiliary suction port 27, thereby further improving the cooling performance.

  On the other hand, in the air volume sucked from the vent 19 and the setting of the motor 15 according to the present embodiment, the cooling performance of the motor 15 while changing the opening area of the auxiliary suction port 27 while fixing the opening area of the first inlet 8. In the experiment for measuring the dust collection performance and noise of the surface to be cleaned, the cooling area of the motor 15 and the surface to be cleaned are determined by setting the opening area of the auxiliary suction port 27 to about 25% of the opening area of the first inlet 8. The best balance between dust collection performance and noise.

  Of course, if it is necessary to further improve the cooling performance by the amount of air sucked from the ventilation port 19 and the setting of the motor 15, the ratio of the opening area of the auxiliary suction port 27 may be increased. It has been found that a decrease in dust collection performance and an increase in noise become conspicuous when the ratio is over%.

  When the first inlet 8 is branched into the main suction port 26 and the sub suction port 27, dust on the surface to be cleaned is sucked from the main suction port 26 having a narrowed opening area, and the opening area is narrowed. As a result, the suction airflow passing through the main suction port 26 is increased in flow velocity, so that the suction airflow flowing in the dust collection chamber 5 of the lower case 12 is also increased in flow velocity. Therefore, the dust collection performance of dust from the surface to be cleaned is improved. Needless to say, it can be complemented.

  In the present embodiment, the partition wall 25 that divides the main suction port 26 and the sub suction port 27 extends to the end surface of the first projecting portion 16 that is the first inflow port 8 or near the end surface, whereby dust is generated. In the course of the path from the suction port 6 to the main suction port 26, dust can be prevented from entering the space between the upper case 11 and the lower case 12 in which the motor 15 is accommodated, and the suction airflow is mainly generated by the rectification effect. Noise when flowing through the suction port 26 can be reduced.

In the present embodiment, as the branching means, the partition 25 provided in the suction port member 17 fixed to the lower case 12 is used to branch into the main suction port 26 and the sub suction port 27. As a form of the branching means, the connection pipe 10 is rotatably held in the suction tool body 7, and the first protrusion 16 formed in the connection pipe 10 is branched into the main suction port 26 and the sub suction port 27. Needless to say, similar effects can be obtained.

  As described above, the vacuum cleaner according to the present invention can efficiently cool the heat-generating parts of the suction tool using suction air, so suction in a canister type, handy type, upright type, etc. vacuum cleaner It can be applied to the use of tools.

DESCRIPTION OF SYMBOLS 2 Suction tool 5 Dust collection chamber 6 Suction port 7 Suction tool main body 8 1st inflow port 9 1st outflow port 10 Connection pipe 11 Upper case 12 Lower case 14 Rotating brush 15 Motor 17 Suction port member (branch means)
19 Ventilation port 25 Bulkhead 26 Main suction port 27 Sub suction port

Claims (7)

A suction tool body for sucking dust;
An upper case having a vent and forming an upper part of the suction tool body;
A lower case having a dust collection chamber and a suction port and forming a lower portion of the suction tool body;
A connecting pipe having a first inlet and a first outlet and provided at the rear of the suction tool body;
A rotating brush provided in the dust collection chamber;
A motor that is disposed between the upper case and the lower case and that drives the rotating brush;
Branching means for branching the first inlet into a main suction port and a sub suction port,
The branching means is a suction port member that is provided in the lower case and allows the suction port and the first inlet to communicate with each other. with branches to the sub-suction port, the main suction port is communicated with the suction port, the suction Komigu sub suction port you characterized in that communicates with the vent. The suction tool according to claim 1, wherein the sub suction port is disposed so as to face the first inflow port. Motor, suction unit according to claim 1 or 2, characterized in that disposed in the middle of the air passage through the to the secondary inlet of the vent. The suction tool according to any one of claims 1 to 3 , wherein all or part of the sub suction port is disposed closer to the motor side than the center of the first inflow port. The suction tool according to any one of claims 1 to 4 , wherein an opening area of the sub suction port is made equal to or less than half of an opening area of the first inflow port. The suction tool according to any one of claims 1 to 5 , wherein the partition wall extends to the end face of the first inlet or the vicinity of the end face. The vacuum cleaner provided with the suction tool of any one of Claims 1-6 connected to the electric blower which generate | occur | produces the suction wind which a vacuum cleaner main body contains.

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