KR101541508B1 - Low noise blower module - Google Patents

Abstract

The present invention relates to a low noise blowing module that minimizes noise generation by an impeller structure having a multi disk. According to the present invention, there is provided an impeller comprising: an impeller formed by stacking at least one disk having a through hole at a central portion thereof; A motor for rotating the impeller; And a casing that surrounds the impeller and has a suction port for sucking air in an upper portion of the center corresponding to the through hole, and a discharge port for discharging air on one side of the suction port. The disk is rotated in the same direction as the interface, and the casing is formed into a cylindrical shape whose inner surface is close to the outer peripheral surface of the disk, and one side of the casing is projected outward at a certain angle to form the discharge port. The rotation axis of the motor extends to the through hole, and at least one helical wing is formed in the through hole along the rotation axis. Therefore, by rotating the impeller formed by stacking at least one disk having a through hole in the central portion, the air between the disk interfaces is sucked into the suction port by the Bernoulli theorem and the centrifugal force, accelerated from the center portion of the disk to the outer portion, Air can be blown without generating noise.

MD, impeller, low noise, blowing module, bldc motor, interface, Bernoulli theorem

Description

[0001] The present invention relates to a low noise blower module,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blower module, and more particularly, to a low noise blower module having a multi-disk impeller structure with minimized noise.

Generally, a blowing module is a mechanical device (including a conventional blower and a blowing device) causing a flow of air, and includes a motor for supplying power, an impeller or a propeller for causing flow, And a casing for guiding the flow out.

Such a blower module is applied to various products. Some examples of applications are air conditioners such as air conditioners (including buildings or automobile air conditioners), air conditioners, hot and cold air conditioners, hot air devices such as hair dryers, body dryers and hand dryers, Air purifiers, kitchen hoods, ventilators, and other air circulation and purification devices.

Meanwhile, the conventional air blowing module used in the above-described devices is well known, and is formed in a general wing structure in which the impeller or the propeller strikes the air directly to cause air flow. Therefore, the conventional air blowing module generates noise due to air friction and vibration of the impeller / propeller.

For example, various dryers, vacuum cleaners, cold / hot air blowers, etc. incorporate a blowing module for artificially generating wind speeds of several m / s or more, and air friction noise is generated when the impeller / propeller blades of such blowing module are rotated . For example, a hair dryer uses a small DC motor to rotate an impeller / propeller with a wing structure to discharge 90 to 120 ° C hot air at a wind speed of 10 to 15 m / s to dry the hair, and the average is 80 to 95 dB Inevitably occurred.

There is a problem that it is difficult to watch a TV, listen to music, and make a phone call or a conversation when using a hair dryer in which noise is generated in a home or a beauty salon. Particularly, there is a problem that noise is generated more severely in a place such as a beauty salon where a plurality of hair dryers are used at the same time.

In addition, the present invention is also applicable to a cooling and heating apparatus such as an air conditioner, a cooling / heating apparatus, a cold / hot air conditioner using the above blowing module, a hot air apparatus such as a hair dryer, a body dryer, a hand dryer, a dust collecting apparatus such as a vacuum cleaner, In the case of ventilation devices such as devices, kitchen hoods, ventilators, etc., there is a slight difference in the level of noise, but since the noise problem that users actually feel is serious, development of a specific technology capable of reducing the noise of the ventilation module It is a desperate situation.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and it is an object of the present invention to provide a low noise blowing module for blowing air without generating noise by rotating an impeller formed by stacking at least one disk having through- It is for that purpose.

It is another object of the present invention to apply a BLDC motor using ball bearings to both sides of the rotating shaft so as not to generate further noise.

Another object of the present invention is to further improve the blowing efficiency by forming at least one helical blade in the through hole.

According to an aspect of the present invention, there is provided a low noise blowing module including: an impeller formed by stacking at least one disk having a through hole at a central portion thereof; A motor for rotating the impeller; And a casing that surrounds the impeller and has a suction port for sucking air in an upper portion of the center corresponding to the through hole, and a discharge port for discharging air on one side of the suction port.

The impeller includes connecting means for connecting the stacked at least one disk with the motor.

The connecting means may include a bolt and a bushing for fixing the stacked at least one disk, and a bracket for fixing one of the disks to the motor.

The one or more disks formed on the impeller are rotated in the same direction as the interface.

The casing has a cylindrical shape whose inner surface is close to the outer peripheral surface of the disk, and one side of the casing protrudes outward at a predetermined angle to form the discharge port.

The rotation axis of the motor extends to the through hole, and at least one helical wing is formed in the through hole along the rotation axis.

Preferably, the helical wings are formed of a pair of wings having a symmetrical structure, and the helical wings are preferably semicircular at one end thereof. It is further preferable that the helical wings have a triangular shape with one end wide and the other end narrow.

Preferably, the helical wing is a turbine turbine in which the direction of wind and the rotational axis are formed vertically.

The motor is a BLDC motor in which ball bearings are formed on both sides of a rotating shaft. The motor may be formed on one side of the impeller, or may be formed on the inside of the through hole.

The impeller may include at least one impeller, and may be formed on one side of the motor or on both sides of the impeller.

According to the low noise blowing module of the present invention, by rotating the impeller formed by stacking at least one disk having a through hole in the central portion, the air between the disk interfaces is sucked into the suction port by the Bernoulli's theorem and the centrifugal force to accelerate from the disk center portion to the outer portion So that the air can be blown without generating noise.

In addition, a BLDC motor using ball bearings is applied to both sides of the rotating shaft, so that no noise is generated.

In addition, at least one helical blade is formed in the through-hole to further improve the blowing efficiency.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

FIG. 1 is an exploded perspective view showing the overall appearance of a low noise blowing module according to the present invention, FIG. 2 is an exploded sectional view of FIG. 1, and FIG. 3 is a combined sectional view of FIG.

FIG. 4 is a plan view showing a disk having a through hole according to the present invention, and FIG. 5 is a plan view showing a disk on which a bracket is fixed according to the present invention.

As shown in the drawings, the present invention comprises a motor 10, a casing 20, and an impeller 30. The motor 10 includes a rotary shaft 11 and the casing 20 includes an inlet 21 and an outlet 22. The impeller 30 includes a disk 34 and a base disk 35 connected by a bolt 31 and a bushing 32.

The impeller 30 is formed of at least one disk 34 having a through hole 37 at the center thereof.

The impeller 30 includes connecting means for connecting the at least one disk 34 with the motor 10 at predetermined intervals. The connecting means includes a bolt 31 and a bushing 32 for fixing the stacked at least one disk 34 and any one of the disks 34 to the motor 10, And a bracket 36 for fixing the bracket 36. [

To this end, a bolt hole 33 for inserting the bolt 31 is formed in the disk 34. Therefore, the bushing 32 is interposed between the disc 34 and the disc 34, and the bolts 31 are fastened to the bolt hole 33 to stack the discs 34 at predetermined intervals have. In this state, one of the disks 35 is fixed to the motor 10 by using the bracket 36.

The one or more disks 34 formed in the impeller 30 are rotated in the same direction as the interface. Therefore, the air between the boundary layers of the disk 34 is sucked into the casing 20 through the inlet 21 by Bernoulli's theorem and centrifugal force. The air is accelerated from the through hole 37 in the central portion of the disk 34 to the outer circumferential surface portion, and is then discharged to the discharge port 22.

The casing 20 surrounds the impeller 30 and has a suction port 21 for sucking air at an upper center portion corresponding to the through hole 37 and a discharge port 22 for discharging air is formed at one side of the suction port do. Particularly, it is preferable that the casing 20 is formed in a cylindrical shape whose inner surface is close to the outer peripheral surface of the disk 34, and one side surface of the casing 20 protrudes outward at a predetermined angle to form the discharge port 22.

The motor 10 rotates the impeller 30. At this time, it is preferable that the motor 10 is a BLDC motor having ball bearings (not shown) formed on both sides of the rotary shaft 11.

Brushless motor (BLDC) As is well known, brushless motor (BLDC) is generally used as a brushless type motor by setting a field in a rotor and an armature winding in a stator and by determining a current direction of the winding using a sensor (Hall sensor, Photo Diode) . The armature current is supplied so that the magnetic field generated in the armature winding is always at 90 degrees (electric angle) with the fixed magnetic pole provided in the rotor. Generally, three or four-phase inverters are used to change the direction of current, and various types of development have been made with increasing reliability of sensors in recent years. Therefore, the characteristics of the Bldc motor is similar to that of the brush type dc motor, but it is similar to the characteristics of the three-phase induction motor in terms of driving method, so the torque is comparatively high at high speed and can rotate at high speed. , It has a very long lifetime, has little noise and noises, and has the advantage of speed control directly in the motor drive circuit itself.

1 to 5, the impeller 30, which is formed by laminating a plurality of discs 34 in the form of a donut, in which a through hole 37 is formed, The air between the boundary layers of the respective disks 34 is discharged to the outside of the circumferential surface from the center by the Bernoulli theorem and the centrifugal force.

Therefore, when the air entering the center of the disk, that is, the through hole 37, from the suction port 21 of the casing 20 is discharged to the circumferential surface by the centrifugal force of the disk boundary surface of the rotating disk 34 and the Bernoulli theorem, Shaped disk 34 is discharged at a speed of 10 to 20 m / s through a discharge port 22 having a structure in which a part of the circular wall of the casing 20 located close to the outer diameter of the discharge port 34 is opened at an angle. Even if the impeller 30 having the impeller 30 rotates at a high speed, there is no wing and no direct friction with the air occurs, so no noise is generated.

In addition, although different blowing characteristics are obtained depending on the outer diameter and inner diameter of the donut-structure multiple disk 34, the number of disks, the disk space, and the number of revolutions, Unlike noise, the disk is rotated without friction with the air, so noise is excluded.

On the other hand, even if the impeller structure is changed as described above, the noise of the motor itself can not be eliminated. Therefore, in the present invention, a BLDC motor is used instead of a DC brush motor in which a motor itself generates a severe noise when rotating at a high speed of 10000-15000 RPM or more. In particular, the motor 10 of the present invention rotates the bladesless multi-disc 34 on a BLDC motor using ball bearings (not shown) on both sides of the rotating shaft 11 to reduce the noise of the motor itself as well as the noise of the impeller It was excluded as a source.

6 is a view showing an embodiment in which a motor is inserted into a through hole in the low noise blowing module according to the present invention, and FIG. 7 is a view showing an embodiment in which a motor is formed outside the casing in the low noise blowing module according to the present invention. to be.

The motor 10 of the present invention may be formed on one side of the impeller 30 as shown in FIG. 7, or may be formed inside the through-hole 37 as shown in FIG. By forming the motor 10 in the through hole 37 of the disk 30 as described above, the overall size of the module can be greatly reduced.

In addition, when the motor 10 is formed on one side of the impeller 30, one or more helical blades 40 may be formed in the through hole 37.

8A and 8B are views showing blades inserted into the through holes according to the present invention.

The rotary shaft 11 of the motor 10 is extended to the through hole 37 and at least one helical blade 40 is inserted into the through hole 37 .

The helical wings 40 are formed of a pair of wings having a symmetrical structure, and the helical wings 40 are preferably semicircular at one end. When the one end of each of the pair of vanes 10 is formed in a semicircular shape as described above, the shape of the vane 10 can be seen as the shape of a copper foil, as seen from above.

It is further preferable that the spiral blade 10 has a triangular shape with one end being wide and the other end being narrow. With this structure, air blowing efficiency can be further increased.

The spiral blade 10 is preferably a savonious turbine in which the wind direction and the rotation axis are formed perpendicular to each other.

9 is a view showing an embodiment in which a motor is formed on one side of the impeller in the low noise blowing module according to the present invention, and FIG. 10 is a view showing an embodiment in which impellers are formed on both sides of the motor in the low noise blowing module according to the present invention FIG.

As shown in the drawings, the impeller 30 of the present invention may be formed on at least one side of the motor 10 or may be formed to be symmetrical on both sides.

When the at least one impeller 30 is formed to be symmetrical to both sides of the motor 10 as described above, the blowing efficiency of the air can be further increased by the same rotational force.

Further, the low noise blowing module according to the present invention can be applied to a cooling and heating apparatus such as a residential and automobile air conditioner, a cooling and heating apparatus, a cold / hot air conditioner. The cooling / heating device constitutes a normal refrigeration cycle having an indoor fan and an outdoor fan. Preferably, the indoor fan of the cooling / heating device is replaced by the low noise blowing module of the present invention, so that the indoor noise can be reduced.

Also, the low noise blowing module according to the present invention can be applied to hot air devices such as a hair dryer, a body dryer, and a hand dryer. The hot air device includes a heater for heating the air, and the low noise blow module according to the present invention is formed in the vicinity of the heater, so that the air heated by the heater can be blown with low noise.

In addition, the low noise blowing module according to the present invention can be applied to air purifiers such as dust collectors such as a vacuum cleaner having nozzles and dust bags, and air cleaners having various filters, , Ventilators, and the like, so that it is possible to apply the present invention to various devices in a somewhat different manner, thereby substantially reducing the noise felt by the user.

Therefore, according to the present invention, by rotating the impeller formed by stacking at least one disk having a through hole in the central portion thereof, the air between the disk interfaces is sucked into the suction port by the Bernoulli theorem and the centrifugal force to accelerate from the disk center portion to the outer portion, It is possible to blow air without generating noise since it is discharged to the discharge port.

In addition, by applying a BLDC motor using ball bearings to both sides of the rotary shaft, no noise can be generated, and at least one helical blade can be formed in the through hole to further improve the blowing efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

1 is an exploded perspective view showing the overall appearance of a low noise blowing module according to the present invention.

Fig. 2 is an exploded sectional view of Fig. 1; Fig.

Figure 3 is an assembled sectional view of Figure 1;

4 is a plan view showing a disk having a through hole according to the present invention.

5 is a plan view showing a disk on which a bracket is fixed according to the present invention.

6 is a view showing an embodiment in which a motor is inserted into a through hole in the low noise blowing module according to the present invention.

7 is a view showing an embodiment in which a motor is formed outside the casing in the low noise blowing module according to the present invention.

8A and 8B are views showing blades inserted into through-holes according to the present invention.

9 is a view showing an embodiment in which a motor is formed on one side of an impeller in a low noise blowing module according to the present invention.

10 is a view showing an embodiment in which impellers are formed on both sides of a motor in a low noise blow module according to the present invention.

Description of the Related Art

10: motor 11:

20: casing 21: inlet

22: outlet 30: impeller

31: bolt 32: bushing

33: bolt hole 34: disk

35: Base disk 36: Bracket

37: Through hole 40: Spiral wing

Claims (13)

An impeller formed by stacking at least one disk having a through hole at the center thereof; A motor for rotating the impeller; And And a casing which surrounds the impeller and has a suction port for sucking air at an upper portion of the center corresponding to the through hole and a discharge port for discharging air at one side thereof, Wherein the rotary shaft of the motor extends to the through hole, and at least one or more helical blades are formed in the through hole along the rotary shaft. The method according to claim 1, The impeller And connecting means for connecting the stacked at least one disk to the motor. 3. The method of claim 2, Wherein the connecting means comprises: A bolt and a bushing fixing the stacked at least one disk at a predetermined interval, And a bracket for fixing any one of the disks to the motor. The method according to claim 1, The one or more disks formed on the impeller, And is rotated in the same direction as the boundary surface. The method according to claim 1, The casing includes: Wherein the inner surface is formed in a cylindrical shape close to the outer circumferential surface of the disk, and one side of the disk is protruded outward at a predetermined angle to form the discharge port. delete The method according to claim 1, Wherein the spiral wing is formed by a pair of wings having a symmetrical structure. The method according to claim 1, Wherein the spiral blade has a semi-circular shape at one end thereof. The method according to claim 1, Wherein the helical blade has a triangular shape with one end being wide and the other end being narrow. The method according to claim 1, Wherein the helical blade is a turbine turbine having a wind direction and a rotation axis perpendicular to each other. The method according to claim 1, Wherein the motor is a BLDC motor in which ball bearings are formed on both sides of a rotating shaft. The method according to claim 1, Wherein the motor is formed on one side of the impeller or inside the through hole. The method according to claim 1, Wherein the impeller comprises at least one or more than one impeller and is formed on one side of the motor or on both sides of the impeller.

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