JP4068424B2 - Hair Dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hair dryer for applying hot air to hair and drying it.
[0002]
[Prior art]
Generally, a hair dryer is provided with a fan for pressurizing air to create an air flow and a heater for heating the air to produce hot air. In addition, it is also known that the warm air is mixed with air that does not pass through a heater to prevent overheating and overdrying of the air coming out of the air outlet so that the hair is not damaged.
[0003]
For example, Japanese Utility Model Publication No. 63-83104 (Patent Document 1) discloses that an outside air inlet is provided in the body of a dryer. It also discloses that the open area of the outside air inlet can be adjusted. Furthermore, Utility Model Registration No. 301299 (Patent Document 2) discloses that an outside air introduction recess is provided in a converging nozzle that is detachably attached to a dryer body.
[0004]
On the other hand, Japanese Patent Publication No.59-23802 (Patent Document 3) provides a sub-air passage that passes through the fan but does not pass through the heater in addition to the main air passage that passes through the heater from the fan of the dryer, and mixes these winds. Is disclosed. It also discloses that the auxiliary air passage can be freely opened and closed.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 63-83104 [Patent Document 2]
Utility Model Registration No. 301 299 [Patent Document 3]
JP-B-59-23802 [Problems to be solved by the invention]
However, in the configuration in which the outside air inlet is provided near the blower outlet of the dryer as in the above-mentioned Japanese Utility Model Publication No. 63-83104 and Utility Model Registration No. 301429, the outside air at room temperature is introduced without going through the fan. In this case, it is difficult to introduce a sufficient amount of outside air because a negative pressure is generated in the flow path of the warm air and the outside air must be sucked using this negative pressure. In some cases, overheating and overdrying could not be sufficiently mitigated.
[0006]
On the other hand, in the method of introducing outside air at room temperature via a fan of a dryer as in Japanese Examined Patent Publication No. 59-23802, even if the outside air flow path does not pass through the heater, it must pass through a position close to the heater. There wasn't. For this reason, when the heater is used for a long time, heat is also transferred to the flow path of the outside air, and overheating and overdrying of the air coming out of the blowout port may not be alleviated sufficiently.
[0007]
It is an object of the present invention to provide a hair dryer that can introduce a sufficient amount of outside air and that can effectively relieve overheating and overdrying of the air coming out of the air outlet even when the heater is used for a long time. Objective.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the hair dryer of the present invention includes a first air passage that reaches a blower outlet via a fan and a heater, and a fan that passes through the heater on the outlet side from the heater. From the second air passage that merges with the first air passage at a temperature lower than the air of the first air passage, and from the outside air inlet on the outlet side of the fan to the negative pressure generating portion on the second air passage And a third air passage that merges with the second air passage at a temperature lower than that of the air in the first air passage after passing through the heater, and an air volume on the fan side of the negative pressure generating portion in the second air passage. An air volume adjustment unit for adjusting the air flow.
[0009]
In this hair dryer, it is preferable that the outside air intake port of the third air passage is provided in a body of the hair dryer.
[0010]
In this hair dryer, the air volume adjusting unit includes a first stage in which the flow path resistance of the second air path and the third air path is minimized, and a second stage in which the flow path resistance of the third air path is maximized. It is desirable that the stage and the third stage where the flow path resistance of the second air path is maximized can be executed in this order.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is a conceptual diagram illustrating the function of each air passage of a hair dryer according to an embodiment of the present invention. The body 5 of the hair dryer is formed with a first air passage 10 that enters the body through the air inlet 11 and exits from the air outlet 14 provided at the end of the body via the fan 12 and the heater 13. . A second air passage 20 and a third air passage 30 are formed outside the first air passage 10 having a substantially cylindrical shape.
[0013]
The second air passage 20 follows the same route as the first air passage 10 until it enters from the air inlet 11 and passes through the fan 12, but the second air passage 20 is in the first air passage 10 at a branch position 21 on the way. So that it does not pass through the heater 13. The second air passage 20 joins the first air passage 10 at a confluence 24 on the outlet 14 side of the heater 13 at a temperature lower than the air in the first air passage after passing through the heater. Here, the second air passage 20 indicates the portion from the air inlet 11 to the junction 24 with the first air passage. The junction 24 may be substantially outside the outlet 14 of the body 5. In the second air passage 20, a negative pressure generator 23 is provided in front of the joining portion 24 with the first air passage 10.
[0014]
The third air passage 30 enters the body through an outside air inlet 31 provided on the side of the body and at a position closer to the air outlet than the fan 12. The third air passage 30 is a negative pressure generator 23 of the second air passage 20. It is formed so as to merge with the second air passage 20 at a temperature lower than the air in the first air passage after passing through. Here, the third air path is assumed to indicate from the outside air inlet 31 to the negative pressure generating unit 23. The third air passage 30 does not pass through a fan or a heater.
[0015]
FIG. 2 is a side view of the hair dryer according to the above embodiment, in which a part of the internal structure is illustrated by a dotted line. The body 5 to which the handle 6 is attached has a substantially cylindrical shape. A fan 12 is built in between the intake ports 11 on both sides of the body 5, and a heater 13 is built in the air outlet 14 side of the fan 12. In the body 5, the first air path 10, the second air path 20, and the third air path 30 are formed. The first air passage 10 is disposed at the center of the body 5. The second air path 20 and the third air path 30 are disposed outside the first air path 10 and along the vicinity of the surface of the body 5.
[0016]
In the second air passage 20, the flow passage cross-sectional area of the second air passage at the branching position 21 with the first air passage 10 is larger than the flow passage cross-sectional area at the position before the third air passage 30 joins. Yes. Therefore, the air flow at a position before the third air passage 30 is merged can be made faster than the air flow at the branch position 21 with the first air passage 10. Thereby, in the negative pressure generation part 23 which merges with the 3rd air path 30, the negative pressure required in order to introduce external air from the 3rd air path 30 can be generated efficiently.
[0017]
The air outlet 14 may be provided with a nozzle (not shown) having a flat air outlet if necessary. The nozzle may be detachable or integrally formed.
[0018]
FIG. 3 is a cut end view taken along line AA of FIG. A substantially cylindrical first air passage 10 is formed at the center of the substantially cylindrical body 5, and a second air passage 20 and a third air passage 30 are formed in a part of the periphery of the first air passage 10. The air volume adjusting unit 40 in FIG. 1 can cover all or part of the second air path 20 and the third air path 30.
[0019]
FIG. 4 is a view of the air volume adjusting unit viewed from the axial direction, and is obtained by superimposing the cross section of FIG. The air volume adjusting unit 40 includes a plate-like body 41 that can increase or decrease the opening area of the inlet to the negative pressure generating unit 23 in the second air path or the third air path. The plate-like body 41 is supported by a housing 42 that rotates about the axis of the cylindrical body 5 (in this example, the housing 42 and the plate-like body 41 are integrally formed), so that the body Can rotate around an axis. The housing 42 also serves as an adjustment knob that increases or decreases the outside air introduction amount.
[0020]
In a state where the plate-like body 41 does not block either the second air passage 20 or the third air passage 30 (FIG. 4A), the flow resistance of the second air passage 20 and the third air passage 30 is minimum. It is possible to take outside air to the maximum. In a state where the housing 42 is rotated together with the plate-like body 41 and all or a part of the third air passage 30 is blocked (FIG. 4B), the amount of outside air introduced from the third air passage 30 is reduced. The introduction of outside air from the second air passage 20 does not decrease. Even if the flow resistance of the third air passage 30 is maximized, a considerable amount of outside air is supplied through the second air passage 20.
[0021]
When the housing 42 is further rotated and the plate-like body 41 blocks a part of the second air passage 20 (FIG. 4C), the amount of outside air introduced from the second air passage 20 decreases. In addition, since the air volume in the second air passage 20 is reduced, the negative pressure in the negative pressure generating portion 23 is reduced and the third air passage 30 is partially opened (FIG. 4C). The amount of outside air introduced from the three air paths 30 is not so large.
[0022]
In a state where the housing 42 is further rotated and the plate-like body 41 covers the entire second air passage 20 (FIG. 4D), the flow passage resistance of the second air passage 20 is maximized, and the second air passage. The amount of outside air introduced from 20 almost disappears. In addition, even if the negative pressure in the negative pressure generator 23 is almost eliminated and the third air passage 30 is opened (FIG. 4D), the amount of outside air introduced from the third air passage 30 is almost eliminated. In addition, if it comprises so that a negative pressure may generate | occur | produce in the confluence | merging part 24 with the 1st air path 10 of the 2nd air path 20, some external air will be introduce | transduced from the 3rd air path 30 in the state of FIG.4 (D). You can also.
[0023]
As described above, the amount of outside air introduced decreases in the order of (A), (B), (C), and (D) in FIG. 4 as the housing 41 rotates in a certain direction. Adjustment is also easy. An air volume scale (not shown) can also be attached to the surface of the body 5 corresponding to each rotational position of the housing 41. Furthermore, it is desirable to provide a stopper (not shown) for restricting the rotation range of the housing 42 in the range from the state of FIG. 4A to the state of FIG. 4D.
[0024]
As described above, according to the present embodiment, in addition to the third air passage 30, the second air passage 20 that particularly passes through the fan 12 is provided, so that a sufficient amount of outside air can be introduced.
[0025]
In addition to the second air passage 20, a third air passage 30 that does not particularly pass through the fan 12 is provided. Since the third air passage 30 does not have to pass near the heater 13, the temperature of the third air passage 30 does not rise even if the heater 13 is used for a long time. Since the second air passage 20 does not directly pass through the heater, the temperature of the air in the second air passage 20 does not increase significantly. By mixing both the outside air of the second air passage 20 and the third air passage 20 with the warm air of the first air passage 10, overheating and overdrying of the air coming out from the air outlet 14 can be effectively mitigated.
[0026]
Further, according to the present embodiment, since the air volume of the third air path 30 can be interlocked with just adjusting the air volume of the second air path 20, the configuration for adjusting the air volume can be simplified. In addition, since the air volume of the second air passage is adjusted on the fan 13 side from the negative pressure generating portion 23 that merges with the third air passage 30, the second air passage 20 is increased even if the flow resistance of the second air passage 20 is increased. It is possible to prevent the air in the air passage 20 from flowing back to the third air passage 30.
[0027]
Furthermore, according to this embodiment, since it is not necessary to provide a negative pressure generating part in the 1st air path 10, it is not necessary to make the air volume of the 1st air path 10 unnecessarily large.
[0028]
Moreover, according to this embodiment, since the outside air inlet is provided in the body 5 of the dryer, operations such as attaching and detaching nozzles and storage are unnecessary. Further, since the distance from the air outlet 14 to the outside air intake can be increased, there is less possibility that the hair will be sucked from the outside air intake even if the hair flies up with the wind.
[0029]
【The invention's effect】
According to the present invention, there is provided a hair dryer that can introduce a sufficient amount of outside air and can effectively relieve overheating and overdrying of the air coming out of the air outlet even when the heater is used for a long time. be able to.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram illustrating the function of each air passage of a hair dryer according to an embodiment of the present invention.
FIG. 2 is a side view of the hair dryer according to the embodiment, and shows a part of the internal structure by dotted lines.
FIG. 3 is a cut end view taken along line AA in FIG. 2;
FIG. 4 is a view of the air volume adjusting unit as viewed from the axial direction, in which the end face of FIG. 3 is superimposed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... 1st air path, 20 ... 2nd air path, 30 ... 3rd air path, 12 ... Fan, 13 ... Heater, 14 ... Air outlet, 23 ... Negative pressure generating part, 31 ... Outside air intake, 40 ... Air volume Adjustment section

Claims (3)

A first air passage leading to the outlet through the fan and heater;
A second air passage that joins the first air passage at a temperature lower than the air in the first air passage after passing through the heater on the outlet side of the heater, via the fan;
From the outside air inlet on the outlet side of the fan to the negative air pressure generating portion on the second air passage, and merges with the second air passage at a temperature lower than the air in the first air passage after passing through the heater. The third airway,
By increasing / decreasing the opening area of the inlet to the negative pressure generating part in the second air path or the third air path , the fan is more than the negative pressure generating part of the second air path and the third air path. An air volume adjusting unit for adjusting the air volume on the side,
Equipped with a,
The second air path is formed so as to branch from the first air path at a branch position on the outlet side of the fan, and a flow path cross-sectional area at the branch position merges with the third air path. It is larger than the cross-sectional area of the flow path at the position in front of
Hair Dryer. The outside air inlet of the third air passage is provided in the body of the hair dryer ,
The air volume adjustment unit is configured to interlock the air volume of the third air path by adjusting the air volume of the second air path.
The hair dryer according to claim 1 . The air volume adjustment unit includes a first stage in which the flow path resistance of the second air path and the third air path is minimized, a second stage in which the flow path resistance of the third air path is maximized, The third stage in which the flow resistance of the two air passages is maximized is configured to be executed in this order .
The hair dryer according to claim 1 or 2 .

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