JP5868294B2 - Hair dryer - Google Patents

Description

  The present invention relates to a hair dryer provided with an axial fan in a cylindrical housing.

Some hair dryers include an axial fan and a heater inside a cylindrical housing, and the inside of the housing is used as an air passage. The hair dryer warms the air sucked from the intake port at one end and discharges it from the exhaust port at the other end to release warm air, and the user applies the warm air from the hair dryer to the hair. Dry. Conventionally, hair dryers to which functions other than the function of simply drying hair have been added. For example, it is known that neutralizing and moisturizing hair is promoted by applying an air stream containing air ions such as H ⁺ (H ₂ O) _m and O ₂ ⁻ (H ₂ O) _n to the hair. . Patent Literature 1 discloses a hair dryer that includes an ion generation unit for generating ions in the air.

Japanese Patent No. 3402323

  Since the hair dryer is held by the user and used near the head, there is a demand for noise reduction. In a hair dryer having an axial fan in a cylindrical housing, a spiral airflow is generated along the inner surface of the housing as the axial fan rotates. A turbulent flow is generated by the collision between the airflow sucked from the air inlet and the spiral airflow, and noise is generated. In particular, when an obstacle such as an ion generation unit is disposed between the axial fan and the air inlet, the direction of the airflow to the axial fan is biased, turbulence is likely to occur, and noise increases.

  This invention is made | formed in view of such a situation, The place made into the objective is to provide the hair dryer which made noise small by suppressing generation | occurrence | production of a turbulent flow.

  A hair dryer according to the present invention includes a cylindrical housing having one end as an air inlet, and an axial fan that is disposed in the housing and blows air in a cylinder length direction of the housing. Between the axial fan and the intake port, an obstacle that blocks a part of the housing is disposed, and the obstacle is the inner surface of the housing and the axial fan and the intake air. The inner surface portion is provided along a circumferential portion of the inner surface portion, and is spaced from the portion of the inner surface portion in the rotational direction of the axial fan, and the distance between the portion is In the range up to the maximum position, ribs are provided along the flow of air sucked from the intake port.

  In the present invention, in a dryer provided with an axial fan in a cylindrical housing, an obstacle that covers a part of the housing is disposed between the axial fan and the air inlet, and the obstacle is an inner surface of the housing. It is provided along a part of the circumferential direction. The dryer is provided with a rib along the air flow on the inner surface of the housing between the axial fan and the air inlet. The rib is provided in the inner surface of the housing in a range from a part in the circumferential direction adjacent to or connected to the obstacle to the rotational direction of the axial fan and reaching the position where the distance is maximum. . Collision between the airflow sucked from the air inlet and the spiral airflow flowing along the inner surface of the housing in the rotation direction of the axial fan is suppressed by the presence of the rib.

  In the hair dryer according to the present invention, at least a part of the rib is provided in a range from the same position as the downstream end of the obstacle to the axial fan in the tube length direction in the inner surface portion. It is characterized by.

  In the present invention, at least a part of the rib is provided in a range from the downstream end of the obstacle to the axial fan on the inner surface of the housing. In this range, the rib is useful because the airflow sucked from the air inlet and the spiral airflow flowing in the rotational direction of the axial fan collide.

  The hair dryer according to the present invention is characterized in that the rib is provided at a position farther from the part as it is closer to the intake port.

  In the present invention, the rib is shaped so as to be away from the obstacle in the circumferential direction of the inner surface as the portion is closer to the intake port. An airflow in a direction approaching the center of the housing from a direction where no obstacle is present flows along the rib, and collision with the spiral airflow is suppressed.

  In the hair dryer according to the present invention, the obstacle is formed in a portion where the intake port is inclined with respect to the tube length direction and the distance from the axial fan to the intake port is longer than the others. It is provided.

  In the present invention, the air intake port is inclined with respect to the cylinder length direction of the housing, and the area of the air intake port is increased and the air volume is increased.

  The hair dryer according to the present invention is characterized in that the obstacle is a charged particle generator that generates charged particles in the housing.

  In the present invention, the obstacle is a device that generates charged particles such as air ions, and the hair dryer can discharge an air flow containing charged particles.

  The hair dryer according to the present invention is characterized in that a height of the rib from the inner surface is equal to or less than a gap between the rotary blade of the axial fan and the inner surface.

  In the present invention, the height of the rib protruding from the inner surface of the housing is equal to or less than the gap between the rotor blade of the axial fan and the inner surface of the housing. For this reason, the rib is unlikely to be an obstacle for airflow.

  The hair dryer according to the present invention is characterized in that only one rib is provided.

  In the present invention, there is only one rib, and the role of suppressing the collision between the airflow sucked from the air inlet and the spiral airflow can be sufficiently fulfilled by one rib.

  In the present invention, the collision of the airflow in the housing is obstructed, the generation of turbulence is suppressed, and the noise caused by the turbulence is reduced. Therefore, the user of the hair dryer can use the hair dryer comfortably, and the present invention has excellent effects.

It is a perspective view which shows the external appearance of the hair dryer which concerns on this Embodiment. It is a side view of a hair dryer. It is an internal structure figure of a hair dryer. It is a rear view of the hair dryer of the state which removed the inlet cover. It is explanatory drawing for demonstrating the position of a rib. It is a typical perspective view which shows the inner surface of a part of housing. It is typical sectional drawing which shows the positional relationship of the direction of an airflow, and a rib. It is an internal structure figure of the hair dryer which made the rib parallel to the rotating shaft of an axial flow fan.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
FIG. 1 is a perspective view showing an appearance of a hair dryer according to the present embodiment, and FIG. 2 is a side view of the hair dryer. The hair dryer has a configuration in which a grip 2 is attached to a cylindrical housing 1. One end of the housing 1 is an intake port 11, and the other end is an exhaust port 12. A net plate-like intake port cover 13 is attached to the intake port 11. Air that has passed through the air inlet cover 13 is sucked into the housing 1 from the air inlet 11. The vicinity of the exhaust port 12 has a nozzle shape. The grip 2 is provided with switches 21 and 22 that are operated by the user to operate the hair dryer. Further, the grip 2 is provided with a cord bush 23 for protecting a power cord (not shown). A power cord is connected to the grip 2, and the hair dryer is supplied with electric power from the outside through the power cord.

  FIG. 3 is an internal structure diagram of the hair dryer. FIG. 3 shows a side cross-section inside the hair dryer. An axial fan 3 that blows air in the cylinder length direction of the housing 1 is disposed inside the housing 1. The axial fan 3 has a rotary blade 31. When the axial fan 3 operates, external air is sucked from the intake port 11, an air flow is generated in the housing 1, and the air flow is discharged from the exhaust port 12. The axis of rotation of the axial fan 3 is parallel to the cylinder length direction of the housing 1. A heater 4 is disposed between the axial fan 3 and the exhaust port 12. The heater 4 has a configuration in which a heating wire is wound around a support plate arranged along the cylinder length direction of the housing 1. The heater 4 warms the air in the housing 1 and turns the airflow discharged from the exhaust port 12 into warm air.

  FIG. 4 is a rear view of the hair dryer with the air inlet cover 13 removed. Here, the exhaust port 12 side of the housing 1 is the front side, and the intake port 11 side is the back side. In FIG. 4, the grip 2 is omitted, and the configuration in the housing 1 that can be seen from the back side through the air inlet 11 is shown. The hair dryer includes an ion generation unit 6 that generates air ions in the housing 1. The ion generation unit 6 corresponds to a charged particle generator. The ion generating unit 6 is disposed at a position between the axial fan 3 and the air inlet 11 in the space in the housing 1 and closes a part in the housing 1. As shown in FIG. 4, the ion generating unit 6 is connected to a part of the inner surface of the housing 1 in the circumferential direction. The ion generating unit 6 is an obstacle in the present invention. Due to the ion generation unit 6, a part of the airflow flowing from the intake port 11 to the axial fan 3 is blocked.

The ion generation unit 6 includes a needle-like discharge electrode and an annular induction electrode surrounding the discharge electrode. A voltage is applied between the discharge electrode and the dielectric electrode to generate corona discharge, and air ions are generated around the discharge electrode by the corona discharge. The ion generation unit 6 generates a discharge electrode and a dielectric electrode in order to generate both positive air ions such as H ⁺ (H ₂ O) _m and negative air ions such as O ₂ ⁻ (H ₂ O) _n. There are two sets. The ion generation unit 6 generates positive and negative air ions in the air in the housing 1. Air ions generated by the ion generating unit 6 are released into the air sucked into the housing 1 from the air inlet 11, and an air flow containing air ions is discharged from the air outlet 12. The airflow discharged by the hair dryer hits the user's hair, and the effect of promoting the charge removal and moisture retention of the hair is obtained by the air ions contained in the airflow.

  As shown in FIG. 3, the air inlet 11 is inclined with respect to the cylinder length direction of the housing 1. For this reason, the length of the housing 1 from the axial fan 3 to the intake port 11 differs depending on the respective positions in the circumferential direction. The ion generating unit 6 is arranged in a portion where the length from the axial flow fan 3 to the intake port 11 is longer than the others. When the intake port 11 is inclined with respect to the cylinder length direction, the area of the intake port 11 is increased as compared with a case where the intake port 11 is not inclined, and the amount of air sucked from the intake port 11 is increased. For this reason, the fall of the air volume by the ion generation unit 6 interrupting | blocking an airflow is suppressed to some extent.

  As shown in FIGS. 3 and 4, a rib 5 protruding from the inner surface is provided on the inner surface of the housing 1 located between the axial fan 3 and the air inlet 11. As shown in FIG. 4, the height of the rib 5 protruding from the inner surface of the housing 1 is not more than the gap between the peripheral edge of the rotary blade 31 and the inner surface of the housing 1. For this reason, the rib 5 does not block the airflow from the intake port 11 to the axial fan 3, and the air volume is hardly reduced by the rib 5. The rib 5 is provided to reduce the collision between the airflow from the intake port 11 to the axial fan 3 and the spiral airflow that flows along the inner surface of the housing 1 due to the rotation of the axial fan 3.

  FIG. 5 is an explanatory diagram for explaining the positions of the ribs 5. In FIG. 5, the typical cross section which looked at the plane orthogonal to the rotating shaft of the axial fan 3 including the ion generating unit 6 from the back side is shown. Reference numeral 14 denotes a rotation axis of the axial fan 3. The arrows in FIG. 5 indicate the rotational direction of the axial fan 3. In the inner surface of the housing 1, the rib 5 is located in a range from the connecting portion connected to the ion generating unit 6 to the position where the distance from the connecting portion is the maximum in the rotational direction of the axial fan 3. Is provided. The position at which the distance between the connecting portions is maximized is rotationally symmetric with respect to the rotation axis 14 with respect to the center of the connecting portion connected to the ion generating unit 6 in the inner surface of the housing 1 in the circumferential direction. Position. In FIG. 5, the position where the distance from the connecting portion is maximum is the uppermost position on the inner surface of the housing 1. In FIG. 5, the rib 5 is provided on the inner surface of the housing 1 on the right side of the vertical line passing through the rotation shaft 14 and away from the connecting portion connected to the ion generating unit 6. In addition, when the rotational direction of the axial fan 3 is reverse, the position of the rib 5 is also changed, and the rib 5 is provided on the left side of the vertical line passing through the rotary shaft 14.

  FIG. 6 is a schematic perspective view showing a part of the inner surface of the housing 1. As shown in FIGS. 3 and 6, the rib 5 is continuously provided between the axial fan 3 and the intake port 11, and a connection portion connected to the ion generation unit 6 as a portion closer to the intake port 11. It is provided in the position away from. Since a part of the air flow sucked from the air inlet 11 is blocked by the ion generating unit 6, the air current flowing from the air inlet 11 to the axial fan 3 has the housing 1 from the direction where the ion generating unit 6 exists. Almost no airflow toward the center is included. For this reason, in the airflow from the intake port 11 to the axial fan 3, the ratio of the airflow that approaches the center of the housing 1 from the direction where the ion generation unit 6 does not exist increases.

  FIG. 7 is a schematic cross-sectional view showing the positional relationship between the direction of airflow and the ribs 5. Inside the housing 1, an airflow 51 in a direction approaching the center of the housing 1 flows in a portion farther than the ion generation unit 6 with the rib 5 as a boundary. Further, a spiral airflow 52 that flows in the rotational direction of the axial fan 3 flows along the inner surface of the housing 1. The airflow 51 and the spiral airflow 52 that approach the center of the housing 1 have opposite directions in a plane orthogonal to the rotational axis of the axial fan 3. For this reason, when the rib 5 does not exist, the airflow 51 and the spiral airflow 52 collide with each other to generate turbulent flow, and noise due to the turbulent flow is generated. Due to the presence of the ribs 5, the collision of the airflow is obstructed, the generation of turbulence is suppressed, and the noise caused by the turbulence is reduced. Since the position of the rib 5 in the circumferential direction is farther from the ion generation unit 6 as it is closer to the air inlet 11, the airflow is directed toward the center of the housing 1 from the direction where the ion generation unit 6 does not exist. 51 flows smoothly along the rib 5. For this reason, generation | occurrence | production of a turbulent flow is suppressed effectively and a noise reduces effectively. Specifically, the noise was reduced by 0.5 dB or more compared to the case where the rib 5 was not provided. Therefore, the hair dryer is silenced, and the user can use the hair dryer more comfortably.

  As shown in FIG. 7, the collision between the airflow 51 and the spiral airflow 52 occurs in a range between the downstream end of the ion generation unit 6 and the axial fan 3. In the inner surface of the housing 1, the rib 5 as described above is provided in the range from the same position as the downstream end of the ion generation unit 6 to the axial fan 3 in the tube length direction of the housing 1. 5 is preferably provided. By providing the rib 5 in this range, the collision between the airflow 51 and the spiral airflow 52 is effectively obstructed. Therefore, the generation of turbulence is effectively suppressed and noise is effectively reduced.

  The inner surface of the housing 1 is separated from the connecting portion connected to the ion generating unit 6 in a direction opposite to the rotation direction of the axial fan 3 and reaches a position where the distance from the connecting portion is maximized. The rib 5 is not provided. In the vicinity of this range, the airflow that approaches the center of the housing 1 from the direction where the ion generating unit 6 does not exist and the spiral airflow that flows in the rotation direction of the axial fan 3 are the rotational axis of the axial fan 3. The direction in the plane orthogonal to is the same. For this reason, in this range, the collision of the air current hardly occurs, the turbulent flow hardly occurs, and the generated noise is small. Therefore, the rib 5 is not provided in this range. Further, even if a plurality of ribs 5 are provided, the effect of preventing the collision of airflow is sufficient with one rib 5, and conversely, the plurality of ribs 5 cause noise, so that one rib 5 is provided for the hair dryer. Only provided.

  The rib 5 may be provided in parallel to the rotational axis of the axial fan 3. FIG. 8 is an internal structure diagram of a hair dryer in which the rib 5 is parallel to the rotation axis of the axial fan 3. Even with the rib 5 shown in FIG. 8, it is possible to prevent the collision of airflow to some extent. Although the hair dryer provided with the rib 5 is less effective in reducing noise than the hair dryer provided with the rib 5 shown in FIGS. 3, 4, 6, and 7, compared to a hair dryer that does not include the rib 5, Noise can be reduced.

  In the present embodiment, the ion generation unit 6 is connected to the inner surface of the housing 1 so that the ion generation unit 6 is connected to the inner surface of the housing 1. It may be a form along a part of the circumferential direction of the inner surface without. In this embodiment, for example, the ion generation unit 6 is mounted on the inner surface of the air inlet cover 13, and a gap is opened between the inner surface of the housing 1. Further, for example, the ion generation unit 6 is connected to a member protruding from the inner surface of the housing 1, and a gap is opened between at least a part and the inner surface of the housing 1. In these forms, the ion generating unit 6 is disposed closer to a part of the inner surface of the housing 1 in the circumferential direction than the other part, thereby being along a part of the inner surface in the circumferential direction. The rib 5 is separated in the rotation direction of the axial fan 3 from the adjacent portion where the ion generating unit 6 is close, on the inner surface of the housing 1 located between the axial fan 3 and the intake port 11, and is away from the adjacent portion. It is provided in a range up to a position where the distance between them is maximized. Since there is little airflow passing between the proximity part of the inner surface of the housing 1 and the ion generation unit 6, the ratio of the airflow 51 in the direction approaching the center of the housing 1 from the direction where the ion generation unit 6 does not exist increases. Similarly, the occurrence of turbulence is suppressed by the presence of the rib 5.

  In the present embodiment, the charged particle generator is an ion generation unit 6. However, the charged particle generator may be a device that generates charged particles other than air ions such as charged water. Good. Further, the hair dryer may be in a form in which other obstacles are disposed between the axial fan 3 and the air inlet 11. For example, the hair dryer may be in a form in which an obstacle such as a device for humidifying air, a device for adding fragrance or deodorizing / antibacterial, or a power source is disposed in the housing 1.

DESCRIPTION OF SYMBOLS 1 Housing 11 Air inlet 13 Air inlet cover 2 Grip 3 Axial fan 4 Heater 5 Rib 51, 52 Air flow 6 Ion generating unit (obstacle)

Claims (7)

In a hair dryer comprising a cylindrical housing having one end as an air inlet, and an axial fan that is arranged in the housing and blows air in the cylinder length direction of the housing,
Between the axial fan in the housing and the intake port, an obstacle that blocks a part in the housing is disposed,
The obstacle is provided along a portion of the inner surface of the housing in the circumferential direction of the inner surface portion located between the axial fan and the air inlet,
Of the inner surface portion, separated from the portion in the rotational direction of the axial fan, and along the flow of air sucked from the intake port to a position where the distance between the portion and the portion becomes maximum A hair dryer characterized by ribs. Of the inner surface portion, at least a part of the rib is provided in a range from the same position as the downstream end of the obstacle to the axial fan in the tube length direction. The hair dryer according to claim 1. The hair dryer according to claim 2, wherein the rib is provided at a position farther from the part as the part is closer to the intake port. The intake port is inclined with respect to the tube length direction,
The hair dryer according to claim 2 or 3, wherein the obstacle is provided in a portion where the distance from the axial fan to the intake port is longer than the others. The hair dryer according to any one of claims 2 to 4, wherein the obstacle is a charged particle generator that generates charged particles in the housing. The hair dryer according to any one of claims 1 to 5, wherein a height of the rib from the inner surface is equal to or less than a gap between a rotary blade of the axial fan and the inner surface. The hair dryer according to any one of claims 1 to 6, wherein only one rib is provided.

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