# US 2019/0170619 A1 · Chemical substance concentrator and chemical substance detection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170619 A1 - Document ID: US20190170619A1 - Status: Published application - Kind: A1 - Application number: 16/321,217 - Filed: 2017-09-28 - Published: 2019-06-06 - Earliest claimed: 2016-10-31 - Assignees: Panasonic Corporation - Applicants: Panasonic Corporation - Inventors: ATSUO NAKAO; YOSUKE HANAI - Web page: https://patentgrep.com/patent/US20190170619A1 ## CPC - G01N 1/405: {by adsorption or absorption} - B01D 53/0438: {Cooling or heating systems} - B01D 53/0446: {Means for feeding or distributing gases} - B01J 20/06: comprising oxides or hydroxides of metals not provided for in group B01J20/04 - B01J 20/205: {Carbon nanostructures, e.g. nanotubes, nanohorns, nanocones, nanoballs (carbon nanotubes per se C01B32/15)} - B01J 20/28007: {with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like (carbon nanostructures B01J20/205)} - B81B 7/02: containing distinct electrical or optical devices of particular relevance for their function, e.g. microelectro-mechanical systems [MEMS] (B81B7/04 takes precedence) - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - G01N 30/00: Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography {or field flow fractionation} (G01N3/00, G01N5/00, G01N7/00, G01N9/00, G01N11/00, G01N13/00, G01N15/00, G01N17/00, G01N19/00, G01N21/00, G01N22/00, G01N23/00, G01N24/00, G01N25/00, G01N27/00, G01N29/00 take precedence) - B01D 2253/1124: Metal oxides - B01D 2257/304: Hydrogen sulfide - B01D 2257/306: Organic sulfur compounds, e.g. mercaptans - B01D 2257/702: Hydrocarbons - B01D 2257/708: Volatile organic compounds V.O.C.'s - B01D 2258/06: Polluted air - B01D 2259/40096: by using electrical resistance heating - B01J 2220/66: Other type of housings or containers not covered by B01J2220/58 - B01J2220/64 - G01N 30/06: Preparation - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B81B: MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES (piezoelectric, electrostrictive or magnetostrictive elements per se H10N30/00, H10N35/00) - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES ## Abstract A chemical substance concentrator is configured to concentrate a chemical substance contained in a gaseous sample. The concentrator includes a flow passage having a hollow part allowing the gaseous sample flows through the hollow part, first and second electrodes disposed on an inner wall of the flow passage, an electrode wiring connected to the first and second electrodes, a material layer disposed on the electrode wiring, and an adsorbent disposed on the material layer. The adsorbent is configured to adsorb the chemical substance and to desorb the adsorbed chemical substance. The chemical substance concentrator is capable of efficiently desorbing the adsorbed chemical substances. ## Claims ### Claim 1 A chemical substance concentrator configured to concentrate a chemical substance contained in a gaseous sample, the concentrator comprising: a flow passage having a hollow part allowing the gaseous sample flows through the hollow part, the flow passage having a first inner wall facing the hollow part; a first electrode disposed on the first inner wall of the flow passage; a second electrode disposed on the first inner wall and located away from the first electrode; a first electrode wiring connected to the first electrode and to the second electrode, the first electrode wiring generating heat upon being energized; a first material layer disposed on the first electrode wiring so as to transmit the generated heat; and a first adsorbent disposed on the first material layer, the first adsorbent configured to adsorb the chemical substance and to desorb, by the transmitted heat, the adsorbed chemical sub stance. ### Claim 2 (depends on 1) The chemical substance concentrator of claim 1, wherein a length of the first electrode wiring is larger than a distance between the first electrode and the second electrode. ### Claim 3 (depends on 2) The chemical substance concentrator of claim 2, wherein the first electrode wiring includes: a straight section; and a turn-back section connected to the straight section. ### Claim 4 (depends on 3) The chemical substance concentrator of claim 3, wherein the first electrode wiring has a meandrous shape. ### Claim 5 (depends on 2) The chemical substance concentrator of claim 2, wherein the first electrode wiring includes a curved section. ### Claim 6 (depends on 1) The chemical substance concentrator of claim 1, wherein the first adsorbent is made of conductive nanowires. ### Claim 7 (depends on 6) The chemical substance concentrator of claim 6, wherein the nanowires and the first material layer contain same metal oxide. ### Claim 8 (depends on 6) The chemical substance concentrator of claim 6, wherein each of the nanowires includes a metal oxide and a carbon nanotube covered with the metal oxide. ### Claim 9 (depends on 1) The chemical substance concentrator of claim 1, wherein the first adsorbent is made of a conductive porous body. ### Claim 10 (depends on 1) The chemical substance concentrator of claim 1, further comprising: a third electrode disposed on the first material layer; and a fourth electrode disposed on the first material layer, wherein the first material layer extends to the first electrode and the second electrode; and wherein the first material layer is sandwiched between the first electrode and the third electrode, and is sandwiched between the second electrode and the fourth electrode. ### Claim 11 (depends on 10) The chemical substance concentrator of claim 10, wherein the first material layer has: a first surface having the first electrode and the second electrode disposed thereon; a second surface opposite to the first surface, the second surface having the third electrode and the fourth electrode disposed thereon; a first side surface connected to the first surface and the second surface; and a second side surface opposite to the first side surface, the second side surface being connected to the first surface and the second surface, wherein the third electrode covering the first side surface of the first material layer and a part of the first surface of the first material layer, the third electrode contacting the first electrode, and wherein the fourth electrode covering the second side surface of the first material layer and a part of the second surface of the first material layer, the fourth electrode contacting the second electrode. ### Claim 12 (depends on 1) The chemical substance concentrator of claim 1, further comprising a cooling unit that cools the first adsorbent. ### Claim 13 (depends on 1) The chemical substance concentrator of claim 1, further comprising a thermal insulating layer disposed between the first inner wall and the first material layer. ### Claim 14 (depends on 1) The chemical substance concentrator of claim 1, wherein the flow passage further has a second inner wall facing the hollow part, the a second inner wall facing the first inner wall across the hollow part. ### Claim 15 (depends on 1) The chemical substance concentrator of claim 1, further comprising: a second material layer that transmits heat; and a second adsorbent disposed on the second material layer, wherein the second adsorbent is configured to adsorb the chemical substance and to desorb the chemical substance adsorbed by the second adsorbent from the second adsorbent by the heat transmitted by the second material layer. ### Claim 16 (depends on 15) The chemical substance concentrator of claim 15, wherein the first adsorbent and the second absorbent are made of different materials, or wherein the first absorbent and the second adsorbent include different surface coatings provided at respective surfaces of the first absorbent and the second adsorbent. ### Claim 17 (depends on 15) The chemical substance concentrator of claim 15, further comprising: a third electrode disposed in the flow passage; a fourth electrode disposed in the flow passage and located away from the third electrode; a second electrode wiring connected to the third electrode and the fourth electrode, the second electrode wiring generating heat upon being energized; and a current supply unit that selectively supplies an electric current to the first electrode, the second electrode, the third electrode, and the fourth electrode, wherein the second material layer is disposed on the second electrode wiring so as to transmit the heat generated by the second electrode wiring, and wherein the second adsorbent is disposed on the second material layer, and is configured to adsorb the chemical substance and to desorb the chemical substance absorbed by the second adsorbent from the second adsorbent by the heat transmitted by the second material layer. ### Claim 18 (depends on 1) A chemical substance detection device, comprising: a chemical substance concentrator of claim 1; and a detection unit that detects the chemical substance concentrated by the chemical substance concentrator.