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Hair dryer

a hair dryer and air outlet technology, applied in the field of hair dryers, can solve the problems of harmful electromagnetic radiation near the air outlet of the hair dryer to human beings, and achieve the effect of reducing electromagnetic radiation and safe us

Inactive Publication Date: 2010-08-26
CHEN YU LIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is a hand-held hair dryer that reduces the emission of electromagnetic radiation during operation. It achieves this by canceling out magnetic fields caused by the heating coil and motor. The hair dryer is safe to use and has a hollow casing with air inlet and outlet, a switch, a blower, a mounting cylinder, and a heating coil. The mounting cylinder is insulating and heat-resistant, and the heating coil has two segments wrapped in different directions. This design reduces the electromagnetic energy near the air outlet."

Problems solved by technology

Because the electromagnetic radiation respectively resulted from the heating coil (74) and the motor (72) emit in different directions, the electromagnetic radiation near the air outlet of the hair dryer is harmful to human.

Method used

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Experimental program
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Embodiment Construction

[0014]With reference to FIGS. 1 and 2, a hair dryer in accordance with the present invention comprises a casing (10), a switch (20), a blower, a mounting cylinder (50) and a heating coil (60).

[0015]The casing (10) is hollow and has a handgrip, a barrel (12), a cavity, at least one air inlet (11) and an air outlet (13). The handgrip is formed on the casing (10). The barrel (12) is formed on the casing (10) and has a passage defined in the barrel (12) along an axis direction. The cavity is defined in the casing (10) and communicates with the passage. The at least one air inlet (11) and the air outlet (13) are defined in the casing (10) and communicate with the cavity.

[0016]The switch (20) is mounted on the handgrip and may selectively slide to different positions to control the temperature of the airflow generated by the hair dryer.

[0017]The blower is mounted in the cavity of the casing (10) and has a motor (30) and a fan (40). The motor (30) is mounted in the cavity in the casing (10...

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PUM

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Abstract

A hair dryer has a casing, a switch, a blower, a mounting cylinder and a heating coil. The casing is hollow and has at least one air inlet and an air outlet. The switch is mounted on the casing. The blower is mounted in the casing and connects to the switch. The mounting cylinder is heat-resistant and insulating and is mounted in the casing. The heating coil having at least one first segment and at least one second segment is mounted around the mounting cylinder, wherein the two segments are wrapped in different directions. When the hair dryer is activated, magnetic fields resulted from the electrified heating coil and the motor tend to partially cancel each other. Therefore, the electromagnetic energy near the air outlet is reduced.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a hair dryer, and more particularly to a hand-held hair dryer that efficiently reduces the emission of the electromagnetic radiation near the air outlet by interfering the electromagnetic radiation emitted from heating coils with the electromagnetic radiation emitted from a motor.[0003]2. Description of Related Art[0004]With reference to FIGS. 4 and 5, a typical hair dryer has a casing (70) with a barrel, an air outlet, a blower driven by a motor (72) and a heating coil (74). When operating, the blower blows and causes airflow to pass through the electrified heating coil. The airflow is heated by the heating coil (74) and then passes through the air outlet to blow a user's hair. The typical heating coil (74) is wrapped around a mounting cylinder being mounted securely in the casing (70) in a clockwise or counterclockwise direction. In accordance with Ampere's circuital law, the spiral he...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A45D20/10
CPCA45D20/38A45D20/10
Inventor CHEN, YU-LIN
Owner CHEN YU LIN