JP6581140B2 - Carbon molded body, dryer and nozzle - Google Patents

Description

  The present invention relates to a carbon molded body, a dryer, and a nozzle.

  A hair dryer in which a carbon molded body is attached to a discharge port has been proposed (for example, Patent Document 1). In addition to the function of drying hair, this hair dryer also has a function of promoting blood circulation of the human body using far infrared rays emitted from the carbon molded body during use. The carbon molded body attached to the discharge port has a bottomed cylindrical shape, and a plurality of circular through-holes for ventilation in the plan view are provided in the bottom wall.

Registered Utility Model No. 3011964

  By the way, in the hair dryer, when the pressure loss of the warm air at the discharge port becomes large, a so-called hot-stress phenomenon is likely to occur in which the heat is accumulated in the dryer body and the temperature of the dryer body is excessively increased. In particular, when the flow rate of the warm air increases, the heat accumulation phenomenon is more likely to occur. However, since the shape of the through hole in the carbon molded body described in Patent Document 1 is circular in a plan view, there is a limit to increasing the opening area from the viewpoint of suppressing the strength reduction of the carbon molded body. It was. When the strength of the carbon molded body is lowered, for example, when the hair dryer is assembled, the carbon molded body is frequently damaged and the yield may be lowered.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a carbon molded body, a dryer, and a nozzle in which the occurrence of a heat accumulation phenomenon and breakage during manufacturing are suppressed.

In order to achieve the above object, a carbon molded body according to the first aspect of the present invention comprises:
A carbon molded body covering the outlet of the dryer,
Formed from graphite into a plate,
Rutotomoni plurality of long holes are formed through along the spiral line,
A ratio of a distance between two long holes adjacent to each other in a direction orthogonal to the extension direction of the spiral and the thickness direction of the carbon molded body with respect to the width of the plurality of long holes is 0.33 or more and 0.66. It is set within the following range .

Moreover, the carbon molded body according to the second aspect of the present invention is:
A carbon molded body covering the outlet of the dryer,
Formed from graphite into a plate,
A plurality of long holes are provided along a plurality of concentric circles,
The plurality of long holes communicate with at least one other long hole adjacent in the radial direction of the concentric circle via a communication hole extending in the radial direction of the concentric circle .

  According to the present invention, a plurality of long holes are formed so as to be formed in a plate shape from graphite and along the spiral. Alternatively, a plurality of long holes are formed so as to extend along a plurality of concentric circles that are formed in a plate shape from graphite, and each of the long holes is connected to at least one other long hole adjacent in the radial direction of the concentric circles. Communicate. Thereby, an opening area can be enlarged, suppressing the strength reduction of a carbon molded object. Therefore, when using the dryer in which the carbon molded body is mounted on the discharge port, the pressure loss in the carbon molded body is reduced, and the occurrence of the heat-up phenomenon is suppressed, and the breakage of the carbon molded body during manufacturing is suppressed. .

It is the side view which fractured | ruptured partially the dryer which concerns on embodiment of this invention. It is a top view of the carbon forming body concerning an embodiment. It is a cross-sectional arrow view in the AA line of FIG. 2A of the carbon molded object which concerns on embodiment. It is a top view of the carbon molded object which concerns on a comparative example. It is a top view of the carbon forming object concerning a modification. It is the side view which fractured | ruptured partially the dryer concerning a modification. It is a top view of the carbon forming object concerning a modification. It is a side view of the carbon forming object concerning a modification. It is the side view which fractured | ruptured partially the dryer concerning a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The dryer according to the present embodiment includes a carbon molded body that has a plurality of ventilation holes and is attached to the dryer so as to cover the discharge ports. And a carbon molded object radiates | emits far-infrared rays by being heated with warm air. Thereby, a dryer has a function which promotes the blood circulation of a human body using the far infrared rays radiated | emitted from a carbon molded object at the time of use.

  As shown in FIG. 1, the dryer 1 includes a housing 2, a handle portion 6, a blower portion 3, a heating portion 4, a holding frame 5, and a carbon molded body 7. In the use state shown in FIG. 1, it has a substantially T-shaped appearance. The handle portion 6 is configured to be foldable by the connecting portion 61, and the handle portion 6 is in a posture along the housing 2 in a folded state (non-use state). Further, a power cord 62 for supplying power to a power supply unit (not shown) that supplies power to the blower unit 3 and the heating unit 4 is led out from the handle unit 6.

  The housing 2 is formed in a substantially long cylindrical shape. A suction port 23 for taking in outside air is provided at one end in the longitudinal direction of the housing 2, and a discharge port 24 for discharging the air inside the housing 2 to the outside is provided at the other end. The shape of the discharge port 24 is circular when viewed from the direction along the longitudinal direction of the housing 2.

  The air blower 3 includes a motor 31 and a fan 32 that is rotationally driven by the motor 31. By rotating and driving the fan 32 by the motor 31, an air flow that flows from the suction port 23 toward the discharge port 24 is generated in the housing 2. The motor 31 is supported by a support portion 21 formed integrally with the housing 2. The operation of the motor 31 is controlled by a switch (not shown) provided on the handle portion 6.

  The heating unit 4 is composed of a resistor or the like arranged in a state of being wound in a substantially cylindrical holding frame 5. The heating unit 4 can be turned on and off by a switch (not shown) provided in a part of the housing 2. A temperature control switch (not shown) that operates according to the temperature inside the housing 2 is inserted in the wiring that connects the heating unit 4 and the power supply circuit. When the temperature inside the housing 2 becomes higher than a preset temperature (for example, 100 ° C.), the temperature control switch is opened and the heating unit 4 stops.

  The carbon molded body 7 is attached to the housing 2 so as to cover the discharge port 24 of the housing 2. As shown in FIGS. 2A and 2B, the carbon molded body 7 has a circular plate shape in plan view, and a plurality of arc-shaped long holes 71a are provided along the spiral S1. The carbon molded body 7 is formed by subjecting a circular plate 71 made of isotropic high-density graphite to drill a long hole 71a. The disc 71 is manufactured by a manufacturing method similar to the manufacturing method of “carbon molded body” described in, for example, the document: Japanese Patent Application Laid-Open No. 2012-100777. The disc 71 may be formed by stacking a plurality of graphite sheets formed from expanded graphite, for example. Moreover, the shape of the carbon molded body 7 is not limited to a circular shape in plan view, and may be set to another shape according to the shape of the discharge port 24 of the housing 2. For example, when the shape of the discharge port 24 of the housing 2 is rectangular, the shape of the carbon molded body 7 may be rectangular in plan view.

  The diameter of the carbon molded body 7 is appropriately set according to the dimension of the discharge port 24 of the housing 2, and is set to 52 mm, for example. The width of the long hole 71a can be set to 3 mm to 4.5 mm. Further, the thickness W3 of the carbon molded body may be set to 0.5 mm to 3 mm. In this case, from the viewpoint of the strength of the carbon molded body 7, the interval W1 between the two long holes 71a adjacent in the radial direction of the carbon molded body 7 and the interval W2 between the two long holes 71a adjacent in the circumferential direction are respectively It is preferable to set to 1.5 mm to 2 mm.

  Next, the structure of the carbon molded body 7 according to the present embodiment will be described in comparison with the structure of the carbon molded body according to the comparative example. As shown in FIG. 3, the carbon molded body 907 according to the comparative example has a structure in which a plurality of circular holes 971 a in plan view are provided in a circular plate 71. Here, it is assumed that the thickness of the carbon molded body 907 is 0.5 mm to 3 mm similarly to the carbon molded body 7. In this case, from the viewpoint of the strength of the carbon molded body 907, the interval W91 between the two adjacent holes 971a needs to be 1.5 mm or more. Therefore, it is difficult to sufficiently increase the ratio of the sum of the opening areas of the plurality of holes 971a to the total area of the carbon molded body 907.

  On the other hand, in the carbon molded body 7, a plurality of long holes 71a are provided along the spiral S1. Thereby, even if the thickness W3 of the carbon molded body is 0.5 mm to 3 mm, the ratio of the sum of the opening areas of the plurality of long holes 71a to the total area of the carbon molded body 7 is more than the ratio in the case of the comparative example. Can also be increased. That is, the carbon molded body 7 has a larger sum of the opening areas of the plurality of long holes 71a than the carbon molded body 907 according to the comparative example. Accordingly, the carbon molded body 7 has a reduced pressure loss in the carbon molded body 7 as compared with the carbon molded body 907 according to the comparative example.

  As described above, according to the carbon molded body 7 according to the present embodiment, isotropic graphite is formed into a disk shape, and a plurality of long holes are provided so as to follow the spiral curve. Thereby, opening area can be enlarged, suppressing the strength reduction of the carbon molded object 7. FIG. Accordingly, when the dryer 1 in which the carbon molded body 7 is mounted on the discharge port 24 of the housing 2 is used, the pressure loss in the carbon molded body 7 is reduced to suppress the occurrence of a heat-up phenomenon, and the carbon during production is suppressed. Damage to the molded body 7 is suppressed.

  Further, the thickness W3 of the carbon molded body 7 according to the present embodiment is 0.5 mm to 3 mm, which is relatively thin. Thereby, there also exists an advantage that the weight reduction of the carbon molded object 7 and the reduction of material cost are attained.

(Modification)
Although the embodiment of the present invention has been described above, the present invention is not limited to the configuration of the above-described embodiment. For example, as shown in FIG. 4, the carbon molded body 207 has a plurality of elongated holes 271a, 272a, 273a, 274a extending along a plurality (four in FIG. 3) of concentric circles S21, S22, S23, S24. It may be a configured. Here, the long hole 271a communicates with another long hole 272a adjacent in the radial direction of the concentric circle S21 via the communication hole 271b. The long hole 272a communicates with two other long holes 271a and 273a adjacent in the radial direction of the concentric circle S22 via the communication holes 271b and 272b. The long hole 273a communicates with two other long holes 272a and 274a adjacent to each other in the radial direction of the concentric circle S23 via communication holes 272b and 273b.

  Similarly to the embodiment, the diameter of the carbon molded body 207 is appropriately set according to the dimension of the discharge port 24 of the housing 2, and is set to 52 mm, for example. The widths of the long holes 271a, 272a, 273a, and 274a can be set to 3 mm to 4.5 mm. Further, the interval W21 between the two long holes 271a, 272a, 273a, 274a adjacent in the radial direction of the carbon molded body 207 is preferably set to 1.5 mm to 2 mm from the viewpoint of the strength of the carbon molded body 7.

  Also by this structure, there exists an effect similar to the carbon molded object 7 which concerns on embodiment.

  In addition, a nozzle (not shown) attached to the discharge port 24 of the dryer 1 described in the embodiment may be further provided, and the carbon molded bodies 7 and 207 may be a dryer located inside the nozzle. The nozzle may be detachable from the dryer housing, and the carbon molded bodies 7 and 207 may be fixedly or detachably mounted so as to block the internal air flow path.

  In the embodiment, the example of the dryer 1 in which the carbon molded body 7 is mounted on the discharge port 24 of the housing 2 has been described. However, the position where the carbon molded body 7 is provided is not limited to the discharge port 24. For example, as illustrated in FIG. 5, the dryer 301 may include a carbon molded body (auxiliary carbon molded body) 307 disposed in a region AR heated by the heating unit 4 in the housing 2. In FIG. 5, the same reference numerals as those in FIG. Here, at least a part of the area AR is included in the air flow path in the housing 2.

  For example, as shown in FIGS. 6A and 6B, the carbon molded body 307 has a block shape that is long and has a cross-sectional shape orthogonal to the longitudinal direction, in which four corners of a rectangle are obliquely cut out. The carbon molded body 307 is formed from isotropic high density graphite. The carbon molded body 307 includes four tapered portions 371 formed along the longitudinal direction and four grooves 372 for fixing the carbon molded body 307 in the housing 2. The distances L <b> 11 and L <b> 12 and the length L <b> 2 between the two opposing surfaces of the carbon molded body 307 are appropriately set according to the size of the housing 2. The lengths L11, 12 and L2 are set to 14.8 mm, 14.8 mm and 55.5 mm, for example. Each tapered portion 371 is formed such that, for example, the widths W11 and W12 in the direction along each side in the cross section orthogonal to the longitudinal direction are about 2 mm. Further, the grooves 372 are formed, for example, such that the width W21 and the depth W22 are each about 1 mm. The carbon molded body 307 is disposed in the housing 2 in a state in which a support rod 373 provided in the housing 2 is fitted in the groove 372 and fixed to the housing 2 or the holding frame 5. The support rod 373 is extended, for example, so that the base end is fixed to the inner wall of the housing 2 and enters the holding frame 5 from the discharge port 24 side of the housing 2 of the holding frame 5.

  The carbon molded body may be provided with at least one through hole (not shown) penetrating from one end surface to the other end surface in the longitudinal direction, for example. Alternatively, the carbon molded body may be substantially cylindrical. In this case, the carbon molded body may have a side surface formed with a groove extending spirally around its central axis. Further, the shape of the carbon molded body is not limited to the above-described block shape, and may be, for example, a plate shape or a porous shape.

  According to this configuration, since the airflow flowing in the housing 2 contacts not only the carbon molded body 7 but also the carbon molded body 307, the amount of far infrared rays radiated from the dryer 301 at the time of use can be increased. Therefore, the function of promoting blood circulation of the human body using infrared rays is enhanced.

  In the embodiment, the example of the dryer 1 including the heating unit 4 has been described. However, the configuration of the dryer is not limited to this. For example, a dryer 401 that cools the air in the housing 402 is provided in addition to the heating unit 4 as in the dryer 401 shown in FIG. May be. In FIG. 7, the same reference numerals as those in FIG. 5 are assigned to the same configurations as those of the modification described with reference to FIG. The dryer 401 includes a heat sink 473 for discharging heat discharged from the cooling unit 470 to the outside of the housing 402, and a heat insulating member 474 for blocking heat transmitted from the heat sink 473 to the area AR in the housing 402. .

  A part of the housing 402 is formed with a window 402a for exposing a part of the heat sink 473. A part of the handle portion 406 is provided with a slide type changeover switch 461 for switching between a state in which the heating unit 4 is operated and a state in which the cooling unit 470 is operated.

  The cooling unit 470 includes a Peltier element 472 and a heat transfer unit 471. The Peltier element 472 is a flat plate-type thermoelectric conversion element that utilizes the Peltier effect in which a bias of heat occurs when a current flows through a junction between two kinds of metals or semiconductors. As the Peltier element 472, for example, an element having a temperature difference of about 30 ° C. between the heat absorbing portion 472a and the heat generating portion 472b when a current is passed can be employed. The heat transfer part 471 is formed in a rod shape from a metal such as copper or graphite. The heat transfer portion 471 has one end in contact with one surface of the carbon molded body 307 and the other end in contact with the heat absorbing portion 472a of the Peltier element 472. Thereby, the heat absorption part 472a of the Peltier element 472 is thermally coupled to the carbon molded body 307. The heat sink 473 is made of a metal such as copper or graphite, and is in contact with the heat generating portion 472b of the Peltier element 472 and a part thereof is exposed to the outside. In addition, the heat sink 473 may be comprised from the laminated body formed by laminating | stacking the graphite sheet formed, for example from expanded graphite.

  The dryer 401 includes a heating unit driving circuit (not shown) that drives the heating unit 4 and a cooling unit driving circuit (not shown) that drives the cooling unit 470. The heating unit drive circuit receives power supply from a power supply circuit (not shown) to drive the heating unit 4, and the cooling unit drive circuit receives power supply from the power supply circuit to drive the cooling unit 470. The change-over switch 461 switches the power supply destination of the power supply circuit to either the heating part driving circuit or the cooling part driving circuit when the user performs a sliding operation.

  In the above description, the example of the dryer 401 in which the cooling unit 470 cools the carbon molded body 307 has been described. However, the configuration is not limited thereto, and for example, the cooling unit 470 may be configured to cool both the carbon molded body 7 or the two carbon molded bodies 7 and 307.

  According to this structure, since the air which flows through the housing 2 can be cooled, a cool feeling can be given to the user.

  In the embodiment and the above-described modified examples, the carbon molded bodies 7, 207, and 307 are described as being formed from isotropic high-density graphite. However, the present invention is not limited thereto, and is formed from anisotropic graphite, for example. Also good. Alternatively, the carbon molded bodies 7, 207, and 307 may be formed from a C / C composite (Carbon Fiber Reinforced Carbon Composite) obtained by sintering a mixture of carbon fibers and a resin material.

  In the modification described with reference to FIG. 7 described above, the example in which the carbon molded body 307 is heated by the heating unit 4 including a resistor or the like has been described. However, the configuration of the heating unit is not limited to the one configured by a resistor or the like, and for example, an induction coil may be provided and the carbon molded body 307 may be induction heated. Alternatively, the heating unit may include a microwave generation source and heat the carbon molded body 307 by irradiating the carbon molded body 307 with microwaves.

  As mentioned above, although each embodiment and modification (including what was written in the description. The same is true hereinafter) of the present invention have been described, the present invention is not limited to these. The present invention includes a combination of the embodiments and modifications as appropriate, and a modification appropriately added thereto.

1, 301, 401: dryer, 2, 402: housing, 3: air blowing unit, 4: heating unit, 5: holding frame, 6,406: handle unit, 7, 207, 307: carbon molded body, 21: support unit , 23: suction port, 24: discharge port, 31: motor, 32: fan, 61: connecting part, 62: power cord, 71: disc, 71a, 271a, 272a, 273a, 274a: long hole, 271b, 272b , 273b: communication hole, 371: taper part, 372: groove, 373: support rod, 402a: window part, 461: changeover switch, 470: cooling part, 471: heat transfer part, 472: Peltier element, 472a: heat absorption part 472b: heat generating part, 473: heat sink, 474: heat insulating member, S1: spiral, S21, S22, S23, S24: concentric circles, AR: region

Claims (6)

A carbon molded body covering the outlet of the dryer,
Formed from graphite into a plate,
Rutotomoni plurality of long holes are formed through along the spiral line,
A ratio of a distance between two long holes adjacent to each other in a direction orthogonal to the extension direction of the spiral and the thickness direction of the carbon molded body with respect to the width of the plurality of long holes is 0.33 or more and 0.66. It is set within the following range,
Carbon molded body. A carbon molded body covering the outlet of the dryer,
Formed from graphite into a plate,
A plurality of long holes are provided along a plurality of concentric circles,
The plurality of long holes communicate with at least one other long hole adjacent in the radial direction of the concentric circle via a communication hole extending in the radial direction of the concentric circle ,
Carbon molded body. A housing having a suction port for taking in outside air and a discharge port for discharging internal air to the outside;
An air blower that forms an air flow that flows from the suction port toward the discharge port in the housing;
A heating unit for heating the air flowing in the housing;
A carbon molded body according to claim 1 or 2,
Dryer. An auxiliary carbon molded body formed of graphite and disposed in a region heated by the heating unit in the housing;
The dryer according to claim 3. A cooling unit for cooling the auxiliary carbon molded body;
The dryer according to claim 4. It is a nozzle that can be attached to and detached from the discharge port of the dryer,
The carbon molded body according to claim 1 or 2 is disposed inside,
nozzle.

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