SLIM TYPE VACUUM INHALING APPARATUS HAVING HIGH EFFICIENCY AND ROBOT CLEANER USING THE SAME
First Claim
1. A vacuum inhalation apparatus comprising:
- a brushless direct-current (BLDC) motor comprising a rotor and a stator, for generating a rotational force;
a rotational shaft which is fixedly combined at the center of the rotor through a rotor bushing so as to rotate;
an impeller which is located on the upper portion of the rotor and whose lower plate is fixedly coupled at one side of the rotational shaft to thus generate an inhalation force via a first intake hole which is located at the center of the upper plate of the impeller when the rotational shaft rotates;
a fan guide which is disposed between the impeller and the BLDC motor, in which a number of spiral guide grooves which guide a flow of air which is inhaled by the inhalation force generated by the impeller are formed in the outer circumferential portion of the fan guide and a number of fan connecting rods are extended in the outer circumferential portion of the lower end of the fan guide so as to surround the BLDC motor;
a control printed circuit board (PCB) in which the stator is fixed, and which applies a drive voltage for the BLDC motor;
a PCB cover that fixedly supports the number of the fan connecting rods of the fan guide, and protects the lower portion of the control PCB; and
a cover in which a second inhalation hole which is located at the center of the cover is extended to the first inhalation hole of the impeller, and the outer circumferential portion of the cover surrounds the impeller and the fan guide, and which is extended to form an air passage route between the number of guide grooves and the inner circumferential portion of the cover and is combined in the outer circumferential portion of the fan guide,wherein external air which is introduced from the guide grooves of the fan guide into the inside of the BLDC motor via the air passage route is discharged into the space which is formed between the number of the fan connecting rods.
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Accused Products
Abstract
Provided is a high-efficiency slim vacuum inhalation apparatus which cools heat generated from heat-generation sources without using particular heat radiation components, and a robot cleaner employing the same. The vacuum inhalation apparatus does not need particular heat radiation components since an impeller is closely adhered to a rotational shaft by a pair of washers and an impeller bushing, to thus avoid from sliding, and since an inhalation efficiency which is caused by a brushless direct-current (BLDC) motor increases, and thus power consumption decreases. Further, since a BLDC motor is incorporated in a vacuum inhalation apparatus so that the vacuum inhalation apparatus can be implemented into a slim type, a robot cleaner can be also compactly realized into a slim type.
15 Citations
17 Claims
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1. A vacuum inhalation apparatus comprising:
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a brushless direct-current (BLDC) motor comprising a rotor and a stator, for generating a rotational force; a rotational shaft which is fixedly combined at the center of the rotor through a rotor bushing so as to rotate; an impeller which is located on the upper portion of the rotor and whose lower plate is fixedly coupled at one side of the rotational shaft to thus generate an inhalation force via a first intake hole which is located at the center of the upper plate of the impeller when the rotational shaft rotates; a fan guide which is disposed between the impeller and the BLDC motor, in which a number of spiral guide grooves which guide a flow of air which is inhaled by the inhalation force generated by the impeller are formed in the outer circumferential portion of the fan guide and a number of fan connecting rods are extended in the outer circumferential portion of the lower end of the fan guide so as to surround the BLDC motor; a control printed circuit board (PCB) in which the stator is fixed, and which applies a drive voltage for the BLDC motor; a PCB cover that fixedly supports the number of the fan connecting rods of the fan guide, and protects the lower portion of the control PCB; and a cover in which a second inhalation hole which is located at the center of the cover is extended to the first inhalation hole of the impeller, and the outer circumferential portion of the cover surrounds the impeller and the fan guide, and which is extended to form an air passage route between the number of guide grooves and the inner circumferential portion of the cover and is combined in the outer circumferential portion of the fan guide, wherein external air which is introduced from the guide grooves of the fan guide into the inside of the BLDC motor via the air passage route is discharged into the space which is formed between the number of the fan connecting rods. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vacuum inhalation apparatus comprising:
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a brushless direct-current (BLDC) motor comprising a rotor and a stator, for generating a rotational force; a rotational shaft which is fixedly combined at the center of the rotor through a rotor bushing so as to rotate; a control printed circuit board (PCB) to the bottom of which the stator is fixed, and which applies a drive voltage for the BLDC motor; an impeller whose lower plate is fixedly coupled at one side of the rotational shaft to thus generate an inhalation force via a first intake hole which is located at the center of the upper plate of the impeller when the rotational shaft rotates; a fan guide which is disposed between the impeller and the control PCB, in which a number of spiral guide grooves which guide a flow of air which is inhaled by the inhalation force generated by the impeller toward the upper side of the control PCB are formed in the outer circumferential portion of the fan guide and a number of fan connecting rods which are located at the outer circumferential portion of the lower end of the fan guide are fixedly supported to the outer circumferential portion of the control PCB; and a cover in which a second inhalation hole which is located at the center of the cover is extended to the first inhalation hole of the impeller, and the outer circumferential portion of the cover surrounds the impeller and the fan guide, and which is extended to form an air passage route between the number of guide grooves and the inner circumferential portion of the cover and is combined in the outer circumferential portion of the fan guide, wherein external air which is introduced from the guide grooves of the fan guide into the upper side of the control PCB via the air passage route is discharged into the space which is formed between the number of the fan connecting rods. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A robot cleaner comprising:
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a main body; a number of wheels which are located at the lower portion of the main body, and which make the main body move to a predetermined direction; a dust collector which collects foreign matters in air inhaled via an inhalation nozzle; a vacuum inhalation apparatus which generates an inhalation force that inhales air through the inhalation nozzle; and a battery that offers a drive power to the vacuum inhalation apparatus, wherein the vacuum inhalation apparatus comprises; a brushless direct-current (BLDC) motor comprising a rotor and a stator, for generating a rotational force; a rotational shaft which is fixedly combined at the center of the rotor through a rotor bushing so as to rotate; an impeller which is located on the upper portion of the rotor and whose lower plate is fixedly coupled at one side of the rotational shaft to thus generate an inhalation force via a first intake hole which is located at the center of the upper plate of the impeller when the rotational shaft rotates; a fan guide which is disposed between the impeller and the BLDC motor, in which a number of spiral guide grooves which guide a flow of air which is inhaled by the inhalation force generated by the impeller are formed in the outer circumferential portion of the fan guide and a number of fan connecting rods are extended in the outer circumferential portion of the lower end of the fan guide so as to surround the BLDC motor; a control printed circuit board (PCB) in which the stator is fixed, and which applies a drive voltage for the BLDC motor; a PCB cover that fixedly supports free ends of the number of the fan connecting rods of the fan guide, and protects the lower portion of the control PCB; and a cover in which a second inhalation hole which is located at the center of the cover is extended to the first inhalation hole of the impeller, and the outer circumferential portion of the cover surrounds the impeller and the fan guide, and which is extended to form an air passage route between the number of guide grooves and the inner circumferential portion of the cover and is combined in the outer circumferential portion of the fan guide. - View Dependent Claims (14, 15, 16, 17)
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Specification