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A vaporizer or vaporiser is a device used to vaporize the active ingredients of plant material, commonly cannabis, tobacco, or other herbs or blends for the purpose of inhalation. However, they can be used with pure chemicals when mixed with plant material (e.g. tobacco-free nicotine). Vaporizers contain various forms of extraction chambers including straight bore, venturi, or sequential venturi, and are made of materials such as metal or glass. The extracted vapor may be collected in an inflatable bag, or inhaled directly through a hose or pipe. With no combustion happening when used properly and cooler temperatures, a significantly better efficiency in extracting the ingredients can be obtained. Hence, the irritating and harmful effects of smoking are heavily reduced,〔 〕 as is secondhand smoke. ==E-cigarette vaporizers== (詳細はbattery-powered vaporizer which simulates the feeling of smoking, but without burning tobacco. The three main types of e-cigarettes are cigalikes, eGos, and MODs.〔 Their use is commonly called "vaping". The user activates the e-cigarette by taking a puff or pressing a button.〔 They are often cylindrical, but come in many variations. Some look like traditional cigarettes. Most are reusable but there are also disposable versions called first generation cigalikes. There are also second, third, and fourth generation devices. Instead of cigarette smoke, the user inhales an aerosol, commonly called vapor. E-cigarettes typically have a heating element that atomizes a liquid solution known as e-liquid. E-liquids usually contain propylene glycol, glycerin, water, nicotine, and flavorings. E-liquids are also sold without propylene glycol, without nicotine, or without flavors.〔 The benefits and the health risks of e-cigarettes are uncertain. There is tentative evidence that they can help people quit smoking, but they have not been proven better than regulated medication.〔 , their usefulness in tobacco harm reduction is unclear, but they have a potential to be part of the strategy to decrease tobacco related death and disease. Their safety risk to users is similar to that of smokeless tobacco. Regulated US Food and Drug Administration (FDA) nicotine replacement products are safer than e-cigarettes,〔 but e-cigarettes are probably safer than smoking. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vaporizer (inhalation device)」の詳細全文を読む スポンサード リンク
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