Cyclone blower barrel hair dryer configuration   

Abstract: The present disclosure relates to a hair dryer with a cyclone blast barrel that discharges airflow farther and faster by means of a helical blast barrel structure, and particularly, to a hair dryer comprising: a first blast barrel and a second blast barrel for discharging air in cyclone form; a heater that generates heat of a predetermined temperature; a fan-motor for rotating a fan to blow air; and a cover for providing an enclosure for securing components and a protection against impacts, wherein the hair dryer strongly discharges air at high speed for the same output of a drive motor, and has the effect of discharging air that is uniform in temperature.

TECHNICAL FIELD

The present disclosure relates to a structure of a cyclone blast barrel of a hair dryer for blowing spiral airflow like whirlwind (‘cyclone’ hereinafter). More particularly, the present disclosure relates to a cyclone blower barreled hair dryer with helical grooves and protrusions formed on the barrel to supply airflow farther and faster.

BACKGROUND ART

In drying washed or damp hair, a generally used appliance is hair dryer that conventionally has an electrically powered motor with a driving shaft to which a propeller or a fan is fixed to generate a motor-driven airflow in one direction and a heating element (heater) in an ejecting path of the airflow for heating the same. When a user turns on the power supply for drying the hair, the heating element operates to radiate heat as the motor runs to rotate the fan which ejects the airflow warmed up by the radiated heat.

Conventional hair dryers of such construction rely on increased size of the drive motor and the fan to provide a sufficient discharge of the airflow.

However, the known methods need a larger motor consuming more power and a bigger and thus noisier fan, resulting in an undesirably bulkier hair dryer.

Moreover, there are problems of uneven mixture of airflow leaving separate hot and cold airflows failing to provide an even temperature which in turn damages hair and causes frequent malfunctions arising from the temperature irregularities.

Korean Patent Application No. 10-1995-25139 filed on Aug. 16, 2009 entitled Cyclone Apparatus for Hair Dryer suggests a partial improvement over the prior art.

FIG. 1 is an elevational view of an exemplary prior art cyclone discharge structure of a hair dryer.

To describe the prior art in detail referring to the drawings, a hair dryer 1 having a body 2 is provided with a blower fan 3 and a front end outlet 4 encompassing a bearing 8 and snap rings 9, 9′ for rotatably supporting a shaft 10 which is distally fitted with a cyclone propeller 6. In this construction, cyclone propeller 6 rotates on its axis.

For example, when hair dryer 1 operates blower fan 3 to drive wind to outlet 4, the wind is warmed through a heating element 5 that has become hot and then turns cyclone propeller 6 which is intended to swirl the wind into a cyclone forced to exit the hair dryer rapidly to a relatively longer distance.

However, the extra components of bearing 8, snap rings 9, 9′, and shaft 10 exact the addition of the cost related to the inventory management of parts and manufacturing of the hair dryers which entail more time for production and more failure factors due to increased moving units.

Moreover, it brings about occasional failures of cyclone propeller 6, when the wind stops exiting the dryer to normally cool the heat built up by the heating element, causing damages of hair dryer 1 with melted outlet 4 and even burns to the user.

Therefore, there is a need to provide an improved technology of hair dryer blower barrel requiring less components with the manufacturing time and number of moving units reduced towards less failure factors and a longer service life while making a well mixed discharge of cold and heated winds into a strong and fast airflow to be delivered in an even temperature.

Therefore, in view of the above-mentioned technical problems and need, the present disclosure provides a cyclone blast barreled hair dryer configured for generating and discharging an airflow cyclone by forming certain grooves and protrusions inside an existing barrel portion without adding to the number of essential dryer components.

The disclosure also provides a cyclone blast barreled hair dryer configured for evenly blending and mixing differently warmed winds into a discharge of airflow of a constant overall temperature.

In addition, the disclosure provides a cyclone blast barreled hair dryer structured with no extra moving parts allowing a simple and sturdy blast barrel to bring down failure factors but generate and discharge an airflow cyclone with increased blast speed and forces.

An aspect of the present disclosure provides a structure of a hair dryer with a cyclone blast barrel for discharging a selection between a cold wind and a heated wind, the structure including: a first blast barrel for defining selected one or more of a helical groove and a helical protrusion, and for conditioning a wind inlet at an internal circumference into a discharge of a cyclone pattern; a second blast barrel fixedly inserted in the internal circumference of the first blast barrel and defining selected one or more of a helical groove and a helical protrusion to condition a wind inlet into a discharge of another cyclone pattern; a heater fixedly inserted in an internal circumference of the second blast barrel for radiating heat at a predetermined temperature upon receiving a supply from a power source; a fan-motor installed behind the heater for supplying the wind generated by rotating a fan upon receiving the supply from the power source to the first blast barrel and the second blast barrel, respectively; and a cover securely fastened to a rear end of the first blast barrel for maintaining the second blast barrel, the heater, and the fan-motor locked in position while providing a protection against external impacts and letting in external airflows.

Preferably, the first blast barrel and second blast barrel each comprises selected one of the helical groove and the helical protrusion with helical grooves or helical protrusions extending either adjoined all along the length or spaced by a predetermined clearance.

In the meantime, the helical protrusion on the internal circumference of the first blast barrel is held in abutment against the helical protrusion on an external circumference of the second blast barrel, whereby affixing the first blast barrel and second blast barrel together.

In addition, the helical protrusion on the internal circumference of the first blast barrel is arranged corresponding to the helical protrusion on the internal circumference of the second blast barrel, whereby affixing the first blast barrel and second blast barrel together.

Here, the helical groove on the internal circumference of the first blast barrel is arranged corresponding to the helical groove on the external circumference of the second blast barrel, whereby defining a continuous closed helical space.

Moreover, the helical groove on the internal circumference of the first blast barrel is arranged corresponding to the helical groove on the internal circumference of the second blast barrel.

In the meantime, the first blast barrel and second blast barrel each comprises a discharge outlet and a wind inlet having a larger diameter than the discharge outlet.

Additionally, the helical groove and the helical protrusion extend along a full helical length of the blast barrels either continuously, discontinuously or partially by a predetermined length.

In the meantime, a selected one or more of the helical groove and the helical protrusion is formed with the external circumference of the second blast barrel held in abutment against the internal circumference of the first blast barrel.

Further, the internal circumference of the first blast barrel is devoid of a formation of the selected one or more of the helical groove and the helical protrusion.

Here, the helical groove and the helical protrusion are formed in coextension by different sizes from each other.

Moreover, the second blast barrel comprises an insulator for withstanding a melt and deformation from a transmission of heat.

In addition, the first blast barrel is provided with either a smooth exterior surface independently of a construction of the internal circumference of the first blast barrel or a contour corresponding to the helical groove and the helical protrusion on the internal circumference.

Here, the helical groove and the helical protrusion are selected interchangeably by a number of one or more, and extend in either left-hand or right-hand rotation.

In the meantime, the helical groove and the helical protrusion are formed into one or more of a circular shape and other polygonal shapes.

Furthermore, the heater uses either a direct heating method or indirect heating method, and is optionally provided with a temperature controller.

The present disclosure in this construction defines the helical groove or protrusion on the blast barrel of the hair dryer and thereby offers the users the convenience of cyclone wind blowing without increasing the number of components.

Moreover, the present disclosure has the industrial application of providing a high speed and power of wind ejection for the same rating of driving motor by using helical groove or protrusion integrated in the blast barrels.

Further, the present disclosure has the effect of facilitating hair grooming in an increased speed while preventing damages to the hair since it provides a cyclone method for speedy and uniform blending of differently conditioned airflows to prevent drastic temperature changes of the dryer.

FIG. 1 is a diagram illustrating a cyclone discharging structure of a hair dryer according to the prior art;

FIG. 2 is a perspective view of a cyclone barreled hair dryer constructed according to an aspect of the present disclosure;

FIG. 3 is a schematic functional block diagram of an electric circuit configuration of a cyclone barreled hair dryer operated by a power supply according to an aspect;

FIG. 4 is an exploded view of an assembly of a cyclone barreled hair dryer according to an aspect;

FIG. 5 is a cross-sectional view of the cyclone barreled hair dryer of an aspect of FIG. 2 taken along the line A-A;

FIG. 6 is a cross-sectional view of the cyclone barreled hair dryer of an aspect of FIG. 2 taken along the line B-B;

FIG. 7 is a cross-sectional view of an alternative cyclone barreled hair dryer to the FIG. 2 aspect taken along the line B-B;

FIG. 8 is a perspective view of a cyclone barreled hair dryer constructed according to another aspect of the present disclosure;

FIG. 9 is a cross-sectional view of the cyclone barreled hair dryer of the aspect of FIG. 8 taken along the line C-C;

FIG. 10 is a cross-sectional view of a cyclone barreled hair dryer of another aspect of FIG. 8 taken along the line C-C;

FIG. 11 is a cross-sectional view of a cyclone barreled hair dryer of an aspect of FIG. 8 taken along the line C-C;

FIG. 12 is a cross-sectional view of a cyclone barreled hair dryer of yet another aspect of FIG. 8 taken along the line C-C;

FIG. 13 is a cross-sectional view of a cyclone barreled hair dryer of an aspect of FIG. 8 taken along the line D-D;

FIG. 14 is a cross-sectional view of a cyclone barreled hair dryer of another aspect of FIG. 8 taken along the line D-D;

FIG. 15 is a perspective view of a double helical structure of another aspect of the cyclone barreled hair dryer of FIG. 2;

FIG. 16 is a perspective view of a triple helical structure of yet another aspect of the cyclone barreled hair dryer of FIG. 2;

FIG. 17 is a perspective view of a double helical structure of another aspect of the cyclone barreled hair dryer of FIG. 8; and

FIG. 18 is a perspective view of a triple helical structure of yet another aspect of the cyclone barreled hair dryer of FIG. 8.

Terms or words used in this specification and claims are not limited in their interpretations to typical or lexically identified meanings, but they should be interpreted to meet the technical idea of the present disclosure based on the principle that an inventor is permitted to appropriately define the concepts of the disclosure to its best possible description.

Hair dryer is the first hand appliance that basically functions to fast dry user\'s wetted hair or groom hair into a neat form, and upon receiving a power supply it drives a motor and rotates its axially mounted fan to generate and discharge wind so that the wind passes a heat radiating heater element energized by the power supply in a heated state as it exits the dryer. At this time, conventional hair dryers were susceptible to have well warmed sections and insufficiently warmed sections in the wind which was directed straight out of the dryer and the resultant hot air to be used in drying hair has failed to give a definable drying temperature leading to damaged hair conditions. The present disclosure reforms the hair dryer blower barrel instead of increasing its components to generate swirling winds in the form of cyclone which evenly mixes well/under-heated winds to a constant temperature and increase the wind velocity.

In the description of the present disclosure, the expressions of the grooves and concaves are interchangeably used as with the protrusions and protrusions in appropriate lines to facilitate the explanation and understanding. In addition, although the grooves and protrusions are structurally opposite shapes, their functions and operations are same so that the groove may take the place of the protrusion and vice versa and hence these elements are interchangeably used unless they present a functional issue.

FIG. 2 is a perspective view of a cyclone barreled hair dryer constructed according to an aspect of the present disclosure.

To detail the dryer referring to FIG. 2, dryer 100 has an exterior shell of a housing 110 comprised of a first blast barrel 140 and a cover 180 which is joined and fastened to first barrel 140 through screw threading. Alternatively, fastening may include binding agents, joint pins or other means. At one side of first barrel 140 is a switch 120 fixed for turning ON-OFF the power supply through a power cord 130 which is connected between switch 120 and electricity utility. Mounted inside cover 180 is a fan-motor unit which is driven by the power supply and is provided with an air-inlet for drawing air from atmosphere.

First blast barrel 140 has a contoured exterior with continuous spiral grooves or protrusions forming helical concavo-convex surfaces. In addition, the exterior may be optionally shaped to be plainly round.

FIG. 3 is a schematic functional block diagram of an electric circuit configuration of a cyclone barreled hair dryer operated by the power supply according to an aspect.

To detail the circuit referring to FIG. 3, power cord 130 having a wall-plug is in connection with switch 120. Under the ON-OFF control, switch 120 makes or breaks the power supply from power cord 130 to a fan-motor 170 and a heater 160 which are connected in series. Although not depicted, switch 120 may be a multi-level selection type or a sliding type by a design option for controlling the heat radiating operation of heater 160. In addition, heater 160 is constructed from a selection between a direct heating method using a nichrome wire of an alloy of nickel, 15-20% of chromium and others and an indirect heating method with a heating element wrapped by ceramic, quartz or the like, and it may be further provided with an automatic heat controller for keeping the heat under a certain temperature.

FIG. 4 is an exploded view of an assembly of cyclone barreled hair dryer 100 according to an aspect.

To detail the assembly referring to FIG. 4, dryer 100 is equipped with switch 120 that receives an ON-OFF control to make or break the supply of the electricity utility from the wall plug through power cord 130, and it comprises first blast barrel 140, second blast barrel 150, heater 160, fan-motor 170, and cover 180.

First blast barrel 140 is roughly in the shape of a tapered cylinder that has an air-inlet wider than its outlet and is also provided with a part of a handle at the air-inlet side and at least one of inward protrusions and grooves which helically extend continuously over the interior surface of the barrel. In the drawing, for example, it shows that the helical protrusions or (and) grooves extend adjoined all along the length. Such helical grooves or protrusions guide a wind or airflow introduced through the air-inlet into a cyclone pattern which clears the dryer at the outlet. The depth and/or height of the helical grooves and protrusions and an optimal value of their pitch around the barrel for a particular dryer design are desirably selected from repeated experiments over time. In addition, the direction of the helical turns of the grooves and protrusions is determined selectively into the right or left. In addition, the helical grooves and protrusions may be continuous around the barrel or discontinuous in predetermined lengths or partially formed in a fixed length. In the meantime, first blast barrel 140 may be formed by one piece or two pieces selectively.

Cyclone, the powerful revolutions of centrifugal force is generated by a strong wind swirling with a suction force, destructive force, linearity and other properties, generally referring to a tropical low pressure typhoon in meteorology. Around a hair dryer, adding a revolution force to its airflow will provide a wind ejection with a reinforcement and longer distance to travel. Therefore, the faster cyclone wind from the hair dryer penetrates deep into the hair even in a bushy type. Hence, the cyclone wind provides faster, stronger and more penetrative hot or cold airflow which can dry or groom hair faster.

Second blast barrel 150 may be constructed similar to first blast barrel 140 in that it receives wind through a portion having a larger diameter than that of an outlet portion to form a tapered barrel, and has its helical turns of the grooves and protrusions that may be continuous around the barrel or discontinuous in predetermined lengths or partially formed in a fixed length. The pitches of the helical grooves and protrusions of second blast barrel 150 may be equal to those of first blast barrel 140 while the depth and/or height thereof may be either equal or different but desirably determined from repeated experiments over time.

Second blast barrel 150 may be comprised of an insulator which can stop the transmission of heat and withstand the same even at an excessive temperature, and consisted of a single piece or two sections.

Thus formed second blast barrel 150 transforms inlet wind through the respective grooves and/or protrusions spirally formed on its interior and exterior surfaces into the cyclone blast to eject.

In other words, the introduced airflow is transformed into the cyclone wind for ejection by the helical grooves and protrusions formed respectively on the inner walls of first blast barrel 140 and the outer walls of second blast barrel 150, and second blast barrel 150 also has its internally formed helical grooves and protrusions to transform and eject the introduced airflow into a separate cyclone wind.

At this time, the helical protrusions of first blast barrel 140 and the helical protrusions of second blast barrel 150 are fixedly adjoined together along their most adjacent portions in distal occlusion. Therefore, there is a large closed helical space continually formed by the recessed interior circumference or groove of first blast barrel 140 and the recessed exterior circumference or groove of second blast barrel 150 so that the introduced airflow is rotated in the cyclone pattern as it exits the dryer.

Moreover, the recessed interior circumference of first blast barrel 140 and the recessed exterior circumference of second blast barrel 130 may be held affixed and arranged corresponding to each other with a certain distance maintained therebetween. Therefore, an open helical space is continually formed by the interior groove of first blast barrel 140 and the exterior groove of second blast barrel 150 to rotationally eject the introduced airflow in the cyclone pattern.

Since the cyclone pattern of wind generated by the interior circumference of first blast barrel 140 and the exterior circumference of second blast barrel 150 and the cyclone pattern of wind generated by the interior circumference of second blast barrel 150 are rotated in the same direction at the exit end of hair dryer 100, they are strongly blended to reinforce the swirling cyclone wind under the even mixture and blending, resulting in very uniform distribution of the wind temperature.

Therefore, the present disclosure has the structural advantage that blasts the wind of uniform temperature from the dryer by a stronger ejection to reach farther which allows a treat of uniform supply of wind for even the opposite side of thick hair otherwise unreachable heretofore.

Moreover, the dual structure of first blast barrel 140 and second blast barrel 150 provides the benefit of soundproofing to block an internal noise of dryer 100 from leaking out.

In the meantime, in an unfortunate event where heater 160 is troubled or fan-motor 170 is in failure, the insulator material of second blast barrel 150 alone safely handles the transmission of heat, which is structurally reinforced to safeguard the user with the dual structure slowing down the excessive heat to reach the outermost surface of dryer 100.

While first blast barrel 140 and second blast barrel 150 maintain the interspace for generating the cyclone wind as described right above, they may join together leaving no spaces between them, which will be described as an aspect in the following.

Heater 160 is comprised of a heating element 162 for radiating heat with a supply of electricity from the power source and an insulator element 164 that hardly allows the flow of heat. The cross section of insulator element 164 is generally cross-shaped and takes windings of heating element 162 at certain intervals, though insulator element 164 may be modified as heating element 162 is changed in structure. Meanwhile, heater 160 is inserted in the interior circumference of second blast barrel 150 and fixed thereto. In addition, heater 160 itself may be provided with an optional temperature controller for preventing heater 160 from generating heat over a preset temperature. Further, heater 160 may be constructed from a selection between a direct heating method of using heat radiations of heat element 162 comprised of an alloy of nickel and chromium and an indirect heating method incorporating a ceramic heating element, a quartz heating element or the like.

Radiating heat, such heater 160 functions to warm up the adjacently passing airflow into a hot blast or warm wind.

Fan-motor 170 includes a motor 174 having a shaft rotated with the supply from power source and a fan 172 which is rotatably fixed with the shaft for introducing and discharging the airflows one-way in and out the dryer. The shape of fan 172 in the drawing is illustrative only, and fan 172 can assume any shapes as long as it generates and discharges wind unidirectionally and is installable in hair dryer 100.

Meanwhile, in an implementation of the disclosure, fan-motor 170 is fixed on cover 180, although any other fastening structures are applicable as long as it is installed inside hair dryer 100 for discharging wind in a single direction.

Power cord 130 draws in the external electricity utility for supplying, and switch 120 connected in series with fan-motor 170 and heater 160 makes or breaks power supply under ON-OFF control.

In addition, switch 120 controls the rotational speed of fan-motor 170 and the temperature of heater 160 by providing stepwise selections represented by LOW, MIDDLE, HIGH or the like. Then, the control or adjustment may be made by using a linear or rotary sliding controller for selecting an arbitrary value.

Through one or more fastening methods selected from screw threading, hook and eye fastening, and binding agents among others, cover 180 is held together with first barrel 140 to securely protects second barrel 150, heater 160, fan-motor 170, and switch 120 fitted inside first barrel 140 as well as power cord 130 against external impacts. In the present aspect, it is desirable to use the screw fastening. The external impacts include physical, mechanical, and chemical impacts due to intrusion of water, chemicals or the like.

FIG. 5 is a cross-sectional view of the cyclone barreled hair dryer of an aspect of FIG. 2 taken along the line A-A.

As illustrated, second blast barrel 150 is fixedly inserted in the interior circumference of first blast barrel 140, and heater 160 having heating element 162 and insulation element 164 is fixedly inserted in the interior circumference of second blast barrel 150.

The helical protrusions formed on the interior circumference of first blast barrel 140 and the helical protrusions formed on the exterior circumference of second blast barrel 150 are shown fixedly adjoined together. Methods for keeping the fixture may include a mechanical press fitting or using a separate fastener, a spacer for maintaining a certain clearance, and a binding agent.

Also shown in the drawing is a helical space jointly formed by a helical groove recessed into the interior circumference of first blast barrel 140 and another helical groove recessed into the exterior circumference of second blast barrel 150. Extending spirally along the length of first and second blast barrels 140, 150, the helical space is thus enclosed by the same barrels. Alternatively, such helical space may be formed into discontinuous sections along the helical line or a partial formation of a predetermined length, wherein the intervals between the sectional helical spaces may be formed with smoothly contoured cylindrical spaces to facilitate passage of the airflow.

The interior circumference of second blast barrel 150 also forms a spirally extending space.

Although the drawings illustrate a quadruple helical space as an example, a single or coupled cluster of more than two similar spaces may be chosen as an optimal value by a designer\'s preference or through repeated experiments. In addition, the direction of revolution of the helical spaces may be either left or right with no restrictions.

FIG. 6 is a cross-sectional view of the cyclone barreled hair dryer of an aspect of FIG. 2 taken along the line B-B.

As illustrated, fixed to the underside of first blast barrel 140 is second blast barrel 150, to the underside of which is fitted with heater 160 including heating element 162 and insulation element 164.

Formed between first blast barrel 140 and second blast barrel 150 is the space for the cyclone pattern of wind discharge to pass, and also formed between second blast barrel 150 and heater 160 is a space for passing the cyclone pattern of wind discharge, as illustrated.

Here, the wind is discharged in a first independent cyclone pattern through the space between first blast barrel 140 and second blast barrel 150 and a second independent cyclone pattern through the space between second blast barrel 150 and heater 160.

The present disclosure in this construction provides first and second blast barrels 140, 150 with ribbed surfaces from the helical grooves and/or protrusions which may be continuous, discontinuous or partial to discharge the cyclone pattern of wind, and in particular establishes a mixture of the separate discharges of the cyclone winds near the outlet of the dryer into an even stronger cyclone wind. In addition, the dual structure of blast barrel cluster effectively blocks the internal noise.

FIG. 7 is a cross-sectional view of an alternative cyclone barreled hair dryer to the aspect of FIG. 2 taken along the line B-B.

As illustrated, second blast barrel 150 is positioned underside of first blast barrel 140 with a predetermined clearance therebetween. At the same time, the protrusions on the interior circumference of first blast barrel 140 are arranged corresponding to the grooves on the exterior circumference of second blast barrel 150. Except that the modified coupling between first and second blast barrels 140, 150 forms an open helical space, this aspect is functionally similar to the aspect of FIG. 6 and hence the description would not be repeated.

FIG. 8 is a perspective view of a cyclone barreled hair dryer constructed according to another aspect of the present disclosure.

Similar to hair dryer 100 of FIG. 2, this aspect of cyclone barreled hair dryer 100 has an exterior shell of housing 110 comprised of first blast barrel 140 and cover 180 which is joined and fastened to first blast barrel 140 preferably through screw threading among other various fastening methods, and fixed at one side of first blast barrel 140 is switch 120 for turning ON-OFF the power supply through power cord 130 that connects the electricity utility to switch 120, and mounted inside cover 180 is a fan-motor unit which is driven by the power supply and is provided with an air-inlet for drawing air from atmosphere.

However, the exterior of first blast barrel 140 is constant and smooth apart from its interior circumference with spirally formed protrusions and grooves which is the difference.

FIG. 9 is a cross-sectional view of the cyclone barreled hair dryer of the aspect of FIG. 8 taken along the line C-C.

To describe in detail referring to the drawing, second blast barrel 150 is held in abutment against the interior circumference of first blast barrel 140, and a rectangularly recessed cyclone groove 190 is formed in spiral. Although a quadruple helical cyclone groove 190 is formed, any one may be selected from a single, double, triple, quintuple, or other coupled cluster of grooves, and it is preferable to choose an optimal value through repeated experiments.

FIG. 10 is a cross-sectional view of a cyclone barreled hair dryer of another aspect of FIG. 8 taken along the line C-C.

Referring to the drawing in particular, second blast barrel 150 is held in abutment against the interior circumference of first blast barrel 140, and a semicircularly recessed cyclone groove 190 is formed in spiral. Although a quadruple helical cyclone groove 190 is formed, any one may be selected from a single, double, triple, quintuple, or other coupled cluster of grooves similar to the aspect of FIG. 9, and it is preferable to choose an optimal value through repeated experiments.

Cyclone grooves 190 according to FIGS. 9 and 10 are to show examples of structures from a circular shape and other polygonal shapes. In addition, the drawings are intended to show cyclone grooves 190 formed on both of first blast barrel 140 and second blast barrel 150 at their same diametrical locations as well as the cyclone grooves 190 formed on second blast barrel 150 but not on first blast barrel 140, suggesting that cyclone grooves 190 may be formed in either way selected.

In addition, cyclone grooves 190 may be formed extending throughout the respective blast barrels or by a number of discontinuous sections of a predetermined length or into a predetermined length of a singular section on each of the blast barrels, and it is preferable to choose one of these constructions through repeated experiments.

FIG. 11 is a cross-sectional view of a cyclone barreled hair dryer of an aspect of FIG. 8 taken along the line C-C.

Referring to the drawing in particular, second blast barrel 150 is held in abutment against the interior circumference of first blast barrel 140, and a rectangularly protruding cyclone protrusion 195 is formed in spiral. Although a quadruple helical cyclone protrusion 195 is formed, any one may be selected from a single, double, triple, quintuple, or other coupled cluster of protrusions similar to the aspect of FIG. 10, and it is preferable to choose an optimal value through repeated experiments.

FIG. 12 is a cross-sectional view of a cyclone barreled hair dryer of yet another aspect of FIG. 8 taken along the line C-C.

Referring to the drawing in particular, second blast barrel 150 is held in abutment against the interior circumference of first blast barrel 140, and a semicircularly protruding cyclone protrusion 195 is formed in spiral. Although a quadruple helical cyclone protrusion 195 is formed, any one may be selected from a single, double, triple, quintuple, or other coupled cluster of protrusions similar to the aspect of FIG. 11, and it is preferable to choose an optimal value through repeated experiments.

Cyclone protrusions 195 according to FIGS. 9 and 11 are to show examples of structures from a circular shape and other polygonal shapes.

In addition, the drawings are intended to show cyclone protrusions 195 formed on both of first blast barrel 140 and second blast barrel 150 at their same diametrical locations as well as the cyclone protrusions 195 formed on second blast barrel 150 but not on first blast barrel 140, suggesting that cyclone protrusions 195 may be formed in either way selected. In addition, cyclone protrusions 195 may be formed extending throughout the respective blast barrels or by a number of discontinuous sections of a predetermined length or into a predetermined length of a singular section on each of the blast barrels, and it is also preferable to choose one of these constructions through repeated experiments.

Although not shown in the drawings, it is optional to adopt a double formation which incorporates a smaller cyclone protrusion 195 onto cyclone groove 190 in coextension or coextensively forms a smaller cyclone groove 190 onto cyclone protrusion 195.

FIG. 13 is a cross-sectional view of a cyclone barreled hair dryer of an aspect of FIG. 8 taken along the line D-D.

Referring to the drawing in particular, second blast barrel 150 is held in abutment against the underside of first blast barrel 140, and the helical cyclone groove 190 is depicted in longitudinal cross section with heater 160 comprised of heating element 162 and insulating element 164 fixed in place under second blast barrel 150.

Then, cyclone groove 190 leads the wind to be discharged in the swirling fashion of cyclone.

FIG. 14 is a cross-sectional view of a cyclone barreled hair dryer of another aspect of FIG. 8 taken along the line D-D.

Referring to the drawing in particular, second blast barrel 150 is held in abutment against the underside of first blast barrel 140, and the helical cyclone protrusion 195 is depicted in longitudinal cross section with heater 160 comprised of heating element 162 and insulating element 164 fixed in place under second blast barrel 150.

Then, cyclone protrusion 195 leads the wind to be discharged in the revolving fashion of cyclone.

Here, the helical cyclone groove 190 or cyclone protrusion 195 are in a selected one of a circular shape and other polygonal shapes. In addition, a single hair dryer may choose to incorporate both the helical cyclone groove 190 and cyclone protrusion 195 in optional superimposed or adjoining posture with a predetermined space maintained between adjacent pairs of cyclone groove 190 and cyclone protrusion 195. Moreover, a selected number of cyclone grooves 190 and cyclone protrusions 195 may be provided, though it is preferable to bring an optimal number of them through experiments, and they may be formed extending throughout or by discontinuous sections or into a predetermined length of a singular section.

FIG. 15 is a perspective view of a double helical structure of another aspect of the cyclone barreled hair dryer of FIG. 2, and FIG. 16 is a perspective view of a triple helical structure of yet another aspect of the cyclone barreled hair dryer of FIG. 2.

To further detail referring to the drawing, FIG. 15 suggests that helical grooves and/or protrusions are provided in, for example, pairs extending in either left-hand or right-hand rotation on the interior circumferences of the barrels of the hair dryer by depicting such internal profiles as seen externally, and FIG. 16 superficially illustrates the helical grooves and/or protrusions in triplets. Then, the functions by these interior structures are same as described above referring to FIG. 2.

FIG. 17 is a perspective view of a double helical structure of another aspect of the cyclone barreled hair dryer of FIG. 8, while FIG. 18 is a perspective view of a triple helical structure of yet another aspect of the cyclone barreled hair dryer of FIG. 8.

To further detail referring to the drawing, FIG. 17 suggests that helical grooves and/or protrusions are provided in, for example, pairs extending in either left-hand or right-hand rotation on the interior circumferences of the barrels of the hair dryer under its smooth and sleek exterior surfaces, and FIG. 16 superficially illustrates the helical grooves and/or protrusions in triplets. Then, the functions by these interior structures are same as described above referring to FIG. 8.

In the above, although the description details the particular aspects as stated besides various other possible modifications and changes, such changes are obvious for a person skilled in the art to constitute the claims herein enclosed.