67 results about "Heater type" patented technology

The invention relates to a formaldehyde gas sensitive material, the preparation method thereof and a manufacture method of a formaldehyde gas sensitive component. The component of the formaldehyde gas sensitive material takes an SnO2-TiO2 binary nanometer composite material as a substrate, the mol ratio of the Ti / Sn is 0.2 to 0.5, the fractional ratio of the quality adulterated is 2 percent to 5 percent Cd2, the formaldehyde gas sensitive material is adjusted to be pasty after being ground with an appropriate amount absolute ethyl alcohol and 0.2 to 1 portion polyethylene glycol, and is painted on the surface of an electrode pipe evenly, and a formaldehyde gas sensitive electrode pipe is produced through 400 degree annealing processing for two to four hours; finally a formaldehyde gas sensitive component is made through the welding, the electrical ageing and the sealing to the gas sensitive electrode pipe according to the heater type structure traditional process. The gas sensitive sensor made through the invention has low operating temperature, has high sensitivity to the formaldehyde gas, has good antiinterference performance to other indoor pollutant gases, such as benzene, toluene, xylene and ammonia, etc, the response time and the recovery time are short, and the gas sensitive sensor is used for the detection to the indoor decorating formaldehyde gas pollution.

The invention discloses a novel gas sensitive material for detecting low-concentration formaldehyde, and belongs to the technical field of gas sensitive materials. SnO is taken as a base material and In2O3 and graphene are mixed in SnO by virtue of a hydrothermal reaction method or a solvent thermal reaction method (taking alcohol and ethanol as solvents), wherein a molar ratio of SnO to In2O3 is 8-10, and the amount of doped graphene accounts for 0.08-0.15% the sum of the mass of the SnO and the In2O3. A heater-type gas sensitive sensor which is made by taking the material as the gas sensitive material has sensitivity (a ratio of resistance of elements in air to resistance of elements in detected gas) of 1.09-1.1 to 0.001ppm formaldehyde and has sensitivity of 220-240 on 1000ppm formaldehyde at a working temperature of 200 DEG C.

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 for a gas sensor for detecting hydrogen, wherein, ultrasonic wave and low-temperature aging technologies are applied in the complex effect of zinc salts and stannum salts and chemical coprecipitation for preparation of nano ZnSnO3. The invention prepares the novel PdO-ZnSnO3 heater type semiconductor gas sensor by isomerisation of noble metal salts PdCl2, adhesives (ethyl orthosilicate) and deionized water through technologies like grinding, ultrasonic vibration, coating, sintering, etc. on the basis of the nano ZnSnO3, wherein, nano ZnSnO3 bases are prepared by adoption of an improved coprecipitation method. The preparation method for the gas sensor for detecting hydrogen has the advantages of high sensitivity of gas sensitive materials, strong selectivity, low operation temperature, simple preparation technology and so on.

The invention relates to a preparation method and application of aqueous environmentally-friendly type conduction oil in which glycerol is used as a main component, belonging to the field of heat conduction media. According to the invention, the conduction oil contains about 95% by mass of glycerol; the novel conduction oil is extremely environmentally-friendly, can be miscible with water in any proportion and does not contain any toxic and harmful substances, can be discharged without any special treatments, and has the advantages of wide material sources, low price and simple processing technology; and simultaneously, the conduction oil can operate for a long term at high temperature. The novel conduction oil is successfully used on an oil heater type warmer, and can also be popularizedto other related industries at the same time.

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.

The invention provides an application of copper tungstate as an ethanol gas sensing element and a preparation method of a copper tungstate gas sensor, belonging to the technical field of preparation of gas sensitive materials and gas sensors. The preparation method comprises the following steps of: mixing copper solution and tungsten solution based on the same molar ratio of the copper to the tungsten, and reacting, after reacting, cooling, washing with deionized water, drying and roasting to obtain CuWO4 powder; fully mixing and grinding the CuWO4 powder with an adhesive to prepare slurry, evenly coating the slurry on the outer surface of an Al2O3 ceramic tube, and annealing for 2-4h at 400 DEG C to prepare a gas sensitive electrode tube; and finally welding, electrically ageing and packaging the gas sensitive electrode tube according to a traditional heater-type process to prepare a CuWO4 gas sensor. The CuWO4 gas sensor prepared by the invention has the advantages of high sensitivity to ethanol, short response time, favorable selectivity and relatively low working temperature, is simple and easy to prepare by only using conventional containers and devices, and is suitable for industrial production.

The invention discloses a preparation method of a rare earth doped zinc oxide nanowire for a gas sensor. The zinc oxide nanowire is synthesized under a strong alkali condition by using a chemical solution method; the gas sensor is of a heater-type device structure; an aluminum oxide ceramic tube is used as a carrier and internally provided with a heating wire; a gas sensitive material of the rare earth doped zinc oxide nanowire is coated outside the ceramic tube. The gas sensor can be used for detecting ethanol within different working temperature ranges and is high in response ratio and short in response time. The preparation method of the rare earth doped zinc oxide nanowire is simple; the rare earth doping variety and concentration are easy to control; the obtained rare earth doped zinc oxide nanowire has the advantages such as uniformity in diameter distribution, good stability and the like; the rare earth doped zinc oxide nanowire prepared by the invention can be used for the gas sensor, a solar cell photoanode and the like.

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.

Automatic assembly method of a photovoltaic panel with cells of the back-contact type provided with a conductive backsheet with a thermoplastic encapsulating layer; the loading of the cells occurs in combination with their pre-fixing in a combined station sequentially placed before the superimposition of the upper encapsulating layer and after the laying of the conductive adhesive. The loading is carried out with a first device of the automatic mechanical hand type which takes a group of cells, aligns them with the back contacts in correspondence of the holes and lays them vertically from above. Furthermore, a second device of the presser-heater type carries out the pre-fixing of the cells holding them in the final position also with localised heating on at least one portion of each cell in such a way as to activate the adhesive function of the underlying thermoplastic encapsulating layer. A combined loading and pre-fixing station is also disclosed.

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.