68 results about "Heater type" patented technology

A fluid heater of the flow-heater type with a fluid channel having a first fluid channel section (35), at least one substantially cylindrical metal pipe (2), a heating device (6) having preferably two tubular heating bodies (6a, 6b) spaced apart from each other over equidistant circumferential sections of the metal pipe, and a heat-conducting means for the heat-conducting connection to the metal pipe (2), wherein a fluid-guiding core (30) which is made from plastic is arranged in the metal pipe (2), the fluid-guiding core forming the first fluid channel section (35) between the metal pipe and the fluid-guiding core (30), wherein the first fluid channel section (35) runs substantially helically in the form of a groove in an outer surface of the fluid-guiding core,; and wherein the fluid channel has a first fluid connection for fluid supply means and a second fluid connection for fluid removal means, wherein the fluid-guiding core (30) furthermore has a second fluid channel section (34) which is arranged, substantially coaxially, in the interior thereof and is connected in series with the first fluid channel section (35). A fluid connection subassembly can be provided in the region of a first end of the metal pipe (2), said fluid connection subassembly having both the first fluid connection (24a) and the second fluid connection (24b), and therefore fluid is supplied and fluid is removed in the region of the same end sides of the metal pipe (2). A closure stopper (50) is then provided in the region of the second end of the metal pipe (2).

The invention relates to a preparation method and application of an n-p junction type ferrum-copper based oxide gas sensitive element. A gas sensor adopts a heater type device structure and takes an alumina ceramic tube as a carrier. A forked gold electrode is applied to the outer surface of the gas sensor. Platinum extraction electrodes are arranged at the two ends of the gas sensor. A heater strip is arranged in the ceramic tube. A gas sensitive material is coated on the outside the ceramic tube and is an n type semiconductor ferroferric oxide and p type semiconductor cuprous oxide porous compound. The gas sensor is prepared by preparing the alumina ceramic tube on which the material is coated into a tube core and then welding, packaging and electrically aging the tube core according to the conventional process of a heater type device. The preparation method is simple in process, mild in conditions and low in cost and is especially suitable for volume production. The prepared gas sensitive element is used for detecting the ethanol concentration at 200-300 DEG C, has the characteristics of high response sensitivity to 1-1800ppm ethanol, good restorability, quick response and the like and can be used for determining ethanol concentration in industrial and agricultural production and environment detection.

A plug-in type dispenser of liquid volatiles, such as insecticides, fragrants, and the like, of the type having a heater for evaporating the liquid volatiles from a wick, has a lamp that transmits light to an exterior of the dispenser housing incident with an exterior in-use indicator surface of the housing to illuminate the in-use indicator so it is readily visible from a viewing, preferably top, side of the dispenser.

The invention discloses a preparation method for an acetone gas sensor. According to the preparation method, a series of tin dioxide and polypyrrole hybrid materials with different polypyrrole mass percents are prepared by using a simultaneous reaction of a hydrothermal method and a polymer in-situ generation method; the tin dioxide and polypyrrole hybrid materials are used for coating a heater-type device structure and an aluminum oxide ceramic tube is used as a carrier to prepare the acetone gas sensor; a noble metal electrode lead wire is a platinum wire and a sensing element tube core is the aluminum oxide ceramic tube. The method disclosed by the invention is good for finishing a reaction in one step and easily purifying a product. The gas sensor prepared by the method has good gas sensing selectivity on acetone gas under a low working environment; the recovery time can be rapidly responded; meanwhile, the interferences caused by hydrogen, carbon monoxide and ammonia gas can also be eliminated.