Method for thermal vaporization of chemical
First Claim
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1. A method of releasing a chemical into a gas atmosphere, comprising the step of thermally vaporizing a solution of said chemical in a solvent in a thermal vaporizer provided with an integral plug for insertion into an electrical outlet, said thermal vaporizer comprising:
- a vaporizer body;
a ring heater mounted within said vaporizer body;
a wick having a cross sectional area, for drawing up a chemical solution from a bottle which wick is insertable into the ring heater concentrically therewith;
a socket disposed under said heater with spacing therebetween;
a bottle fittable in the form of a removable cap to said socket such that when the bottle is in place, one or more openings are provided for said wick;
at least one air outlet formed in the top portion of said vaporizer body, said air outlets having a total opening area that is 2 to 40 times the cross sectional area of said wick;
at least one air intake formed in the bottom portion of the body and having a total opening area that is 1.5 to 20 times the cross sectional area of said wick; and
a plug electrically connected to said ring heater,wherein said chemical has a vapor pressure of at least 3.5×
10-8 mm/20°
C. and said solvent has a boiling point of not more than 350°
C., the concentration of the chemical being in the range of about 1% by weight to about 80% by weight.
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Abstract
The present invention provides a cordless thermal vaporizer of the liquid type wherein the body of the vaporizer has a heater for heating a wick for drawing up a chemical solution from a bottle, and a socket disposed under the heater and removably fittable in the form of a cap to the bottle for attachment thereto. The body is reduced in weight and thereby made attachable to an electric outlet with stability. The solution bottle can be attached directly to the socket of the body and is therefore easy to replace.
99 Citations
1 Claim
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1. A method of releasing a chemical into a gas atmosphere, comprising the step of thermally vaporizing a solution of said chemical in a solvent in a thermal vaporizer provided with an integral plug for insertion into an electrical outlet, said thermal vaporizer comprising:
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a vaporizer body; a ring heater mounted within said vaporizer body; a wick having a cross sectional area, for drawing up a chemical solution from a bottle which wick is insertable into the ring heater concentrically therewith; a socket disposed under said heater with spacing therebetween; a bottle fittable in the form of a removable cap to said socket such that when the bottle is in place, one or more openings are provided for said wick; at least one air outlet formed in the top portion of said vaporizer body, said air outlets having a total opening area that is 2 to 40 times the cross sectional area of said wick; at least one air intake formed in the bottom portion of the body and having a total opening area that is 1.5 to 20 times the cross sectional area of said wick; and a plug electrically connected to said ring heater, wherein said chemical has a vapor pressure of at least 3.5×
10-8 mm/20°
C. and said solvent has a boiling point of not more than 350°
C., the concentration of the chemical being in the range of about 1% by weight to about 80% by weight.
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Current AssigneeEarth Chemical Company Limited
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Original AssigneeEarth Chemical Company Limited
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InventorsHasegawa, Takahiro, Nishimura, Akira, Mesaki, Junichiro, Kashihara, Takanobu
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Primary Examiner(s)ROBINSON, ALLEN JAY
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Application NumberUS07/942,360Time in Patent Office538 DaysField of Search514/136, 514/490, 514/356, 514/530, 514/531, 514/533, 514/617, 514/693, 514/737, 514/751, 514/765, 424/76.2, 424/76.1, 392/392, 392/395, 392/406US Class Current424/76.2CPC Class CodesA01M 1/2077 using an electrical resista...
