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1. 发明专利

JPH0914655A COMBUSTOR EQUIPPED WITH CO DETECTION SENSOR 失效
公开(公告)号：JPH0914655A
公开(公告)日：1997-01-17
申请号：JP17941295
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP , TOKYO GAS CO LTD
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , TAKESHITA NAOYUKI , YASUGATA KAZUTOSHI , OGINO KAORU , OISHI KAZUHIRO , KUBOTA KAORU
IPC分类号： F23N5/24 , F24H9/20
摘要： PURPOSE: To provide a combustor capable of safely dealing with live gas leakage of fuel gas. CONSTITUTION: There is provided a contact combustion type CO sensor 20 having a CO detection device. The CO sensor 20 is constructed as one capable of detection of hydrocarbon(CmHn) by raising the temperature of the CO detection device. After combustion interruption decision means 24 decides a combustor to interrupt a combustion operation, sensor temperature adjustment means 25 raises the temperature of the CO detection device of the CO sensor 20 to enable the detection of CmHn concentration. When the CmHn detected concentration in an apparatus detected by the CO sensor 20 reaches a combustion obstruction reference concentration, a dangerous combustion obstruction unit 44 obstructs starting of the next combustion operation, while when the CmHn detected concentration is less than the combustion obstruction reference concentration but exceeds safe concentration, a CmHn exhaust operation control unit 45 rotates a combustion fan 5 for exhaustion of CmHn. There is further provided a CmHn safety device 38 for preparing the next combustion operation.

2. 发明专利

JPH09152416A CARBON DIOXIDE GAS DETECTION ELEMENT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH09152416A
公开(公告)日：1997-06-10
申请号：JP31399795
申请日：1995-12-01
申请人： TOKYO GAS CO LTD , YAZAKI CORP
发明人： KONO TAKASHI , TANDA AKIFUMI , MOCHIZUKI KAZU , TAKASHIMA HIROMASA , YASUGATA KAZUTOSHI
IPC分类号： G01N27/409 , G01N27/406 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To determine the concentration of CO in the exhaust gas from a burner where the combustion load fluctuates significantly by modifying an electrode material, composed of the mixture of a platinum group metal and an oxygen ion conductive solid electrolyte, with a specified transition metal oxide. SOLUTION: The electrode material of a solid electrolyte CO sensor composed of the mixture of a platinum group metal and an oxygen ion conductive solid electrolyte is modified with a specified transition metal oxide. Consequently, the adverse effect of H2 in exhaust gas 6 on the detection sensitivity of CO is suppressed. More specifically, CO and H2 in exhaust gas 6 causes electrochemical reaction on the oxygen ion at the three-phase interface of exhaust gas 6, a modification electrode 1, and an oxygen ion conductive solid electrolyte substrate 3 and the electrochemical reaction of H2 is suppressed. On the other hand, a modification electrode 2 covered with a combustible gas oxidizing catalyst 4 oxidizes CO and H2 which can not thereby reach the modification electrode 2. Consequently, an electromotive force appears between the electrodes 1, 2 and the value thereof is indicated by an indicating instrument 7.

3. 发明专利

JPH0914653A COMBUSTION EQUIPMENT 失效
公开(公告)号：JPH0914653A
公开(公告)日：1997-01-17
申请号：JP18069395
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP , TOKYO GAS CO LTD
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , YASUGATA KAZUTOSHI , OGINO KAORU , KUBOTA KAORU
IPC分类号： F23N5/24
摘要： PURPOSE: To prevent fuel supply from uselessly stopping each gusty wind to improve convenience by momentarily inhibiting stoppage of fuel supply to continue combustion even if a fan is controlled in an up-mode and CO concentration exceeds an allowable value when gas quantity detected is smaller than a threshold. CONSTITUTION: When gusty wind blows in, wind velocity detected by a wind velocity sensor 6 rapidly decreases. Also, when gusty wind blows in, combustion air is not adequately fed by a fan 2 to make a combustion condition at a burner 1 worse, so that CO concentration in exhaust gas momentarily increases with a little time lag. Since an increase in CO concentration at this time is momentary, human organism is not affected thereby. A momentary retention means 7 judges blowing-in of gusty wind when wind velocity sensed by the wind velocity sensor 6 lowers below a threshold, and cancels information of CO concentration to temporarily retain stoppage of gas supply even when the fan 2 is controlled in an up-mode and the CO concentration exceeds an allowable value.

4. 发明专利

JPH0914656A COMBUSTION APPARATUS AND COMBUSTION SYSTEM CONTAINING IT 失效
公开(公告)号：JPH0914656A
公开(公告)日：1997-01-17
申请号：JP17941395
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP , TOKYO GAS CO LTD
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , TAKESHITA NAOYUKI , YASUGATA KAZUTOSHI , OGINO KAORU , OISHI KAZUHIRO , KUBOTA KAORU
IPC分类号： F23N5/24 , F24H9/20
摘要： PURPOSE: To provide a combustion apparatus capable of dealing with both of production of CO gas and leakage of live gas of fuel gas. CONSTITUTION: Temperature of a CO sensor 20 for detecting CO concentration in waste gas is controlled to a temperature where CO gas and hydrocarbon(HC) can be detected whereby the CO sensor 20 can detect both of the CO gas and the HC. An HC/CO discrimination unit 26 incorporates therein a detection signal from the CO sensor 20 and a discrimination signal between combustion operation and interruption operation of an apparatus from a combustion discrimination unit 24, and decides the detection signal of the CO sensor 20 during the combustion operation to be a CO concentration detection signal while deciding that during interruption of combustion to be an HC concentration detection signal. When the HC detection signal is outputted exceeding a reference value, gas leakage safety means 43 interrupts a gas leakage safety valve 44 interposed in a fuel gas introduction part to the apparatus.

5. 发明专利

JPH0989835A CLEANING METHOD FOR CARBON MONOXIDE SENSOR 失效
公开(公告)号：JPH0989835A
公开(公告)日：1997-04-04
申请号：JP24789995
申请日：1995-09-26
申请人： TOKYO GAS CO LTD , YAZAKI CORP
发明人： KONO TAKASHI , TANDA AKIFUMI , MOCHIZUKI KAZU , TAKASHIMA HIROMASA , YASUGATA KAZUTOSHI
IPC分类号： G01N27/409 , G01N27/406 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To prevent the aging of a solid electrolytic carbon monoxide sensor, i.e., the increase of H2 /CO ratio, deterioration of response and fluctuation of air base, by applying a voltage between the electrodes of solid electrolytic carbon monoxide sensor for a predetermined time and then performing heat-up processing. SOLUTION: The voltage being applied between the electrodes of a sensor must have same polarity as the electromotive force being generated between the electrodes of sensor. The applying voltage is 1-5V and when it is required to shorten the applying time, a voltage of 4-5V is applied thus obtaining sufficient effect through processing of 4-15sec. An applying voltage higher than 5V may cause damage on stabilization zirconia. A sensor deuterated through long term use is applied with voltages of 1, 3, 5V for 10sec (polarization) in order to lower the sensitivity of carbon monoxide thus enhancing the S/N ratio relatively. This effect is especially eminent when polarization is carried out with applying voltage of 5V.

6. 发明专利

JPH095280A CO SENSOR 失效
公开(公告)号：JPH095280A
公开(公告)日：1997-01-10
申请号：JP17942095
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , YASUGATA KAZUTOSHI , OGINO KAORU , OISHI KAZUHIRO
IPC分类号： G01N27/16
摘要： PURPOSE: To provide a CO sensor which facilitates manufacture of its cover and does not receive bad influence of flow velocity of exhaust gas. CONSTITUTION: A CO detection mechanism part 3 provided with a comparative element 4 and a detection element is formed on the surface side of a sensor base 1, and coated with a cover 35 covered on the sensor base 1. The cover 35 is constituted by a composite material of a filter material 15 and a mesh 16 sandwiching the surface and the rear surface of the filter material 15 with the mesh 16. Small through holes are scatteringly formed on the filter material 15. Exhaust gas passes through the mesh 16 and the filter material 15, is introduced into the cover 35 in a state of almost zero flow velocity, and CO concentration in the exhaust gas is detected by the CO detection mechanism part 3 in the state which has no influence of the flow velocity. Even if the exhaust gas is stopped through the filter material 15, it enters the cover 35 through the small through holes 40 and the detection of the CO concentration is made possible without hindrance.

7. 发明专利

JPH07198652A GAS DETECTING DEVICE 失效
公开(公告)号：JPH07198652A
公开(公告)日：1995-08-01
申请号：JP35232893
申请日：1993-12-29
申请人： YAZAKI CORP
发明人： TAKASHIMA HIROMASA , YASUGATA KAZUTOSHI , OGINO KAORU , NITA HOZUMI
IPC分类号： G01N27/16
摘要： PURPOSE:To precisely detect a burnable gas by enhancing the accuracy of temperature compensation at a low cost without using a temperature sensor and a circuit accompanying therewith. CONSTITUTION:A bridge circuit 6 is fed with a constant current from a constant current power supply 40. When a detecting element 1 detects a gas, an unbalanced potential is generated in the bridge circuit 6, which is delivered as a detection voltage OUT. At this time, the temperature of the atmosphere does not vary, no voltage drop occur since the constant current runs through a comparing element 2. On the contrary, when the temperature of the atmosphere varies, a voltage drop occurs across the comparing element 2. A temperature compensating circuit compensates the unbalanced potential generated through the gas detection by the detecting element 1 in accordance with a variation in the voltage drop.

8. 发明专利

JPS60225051A PEROVSKITE TYPE OXIDE SEMICONDUCTOR OXYGEN SENSOR 失效
公开(公告)号：JPS60225051A
公开(公告)日：1985-11-09
申请号：JP8107484
申请日：1984-04-24
申请人： YAZAKI CORP
发明人： SEIYAMA TETSUO , ARAI HIROMICHI , NITA HOZUMI , YASUGATA KAZUTOSHI
IPC分类号： G01N27/12 , H01B3/12
摘要： PURPOSE:To attain miniaturization of the titled oxygen sensor, by using Srx Na1-xTiO3(x>0.9) obtained by applying valency control by a typical element of Na to SrTiO3 or Sr of SrTiO3. CONSTITUTION:For example, a material having a perovskite structure ABO3 and showing an oxide semiconductive property is prepared as follows. At first, with respect to the preparation of SrTiO3, special grade reagents of SrCO3 and TiO2 are used and sufficiently dried at about 100-150 deg.C while the dried reagents are weighed on the basis of a stoichiometric composition and mixed, crushed and calcined at 1,000-1,200 deg.C for 2-3hr to obtain SrTiO3. This SiTiO3 is sufficiently crushed in an agate mortar and, thereafter, molded under pressure of 60- 120kg/cm to form a pellet having a diameter of about 10mm. and a thickness of 1-2mm. while the pellet is heated to 1,000-1,200 deg.C at a heating speed of 10 deg.C/min to be held at that temp. for 3-6hr and cooled at a speed of 10 deg.C/min to perform sintering. Further, a Pt-paste is baked onto the pellet to form an electrode and a Pt or Au wire is taken out as a lead wire. Furthermore, Sr0.997Na0.003TiO3, wherein valency control is applied to Sr of SrTiO3 by Na, is prepared by the same mfg. method as SiTiO3 by using anhydrous Na2CO3.

9. 发明专利

JPH095278A CO SENSOR 失效
公开(公告)号：JPH095278A
公开(公告)日：1997-01-10
申请号：JP17941895
申请日：1995-06-22
申请人： GASTAR CORP , YAZAKI CORP
发明人： ENOMOTO MASANORI , KIMURA SHINGO , SHIGEOKA TAKUJI , YASUGATA KAZUTOSHI , OGINO KAORU , OISHI KAZUHIRO
IPC分类号： G01N27/16
摘要： PURPOSE: To provide a CO sensor without receiving influence due to flow velocity of exhaust gas. CONSTITUTION: A CO detection mechanism part 3 providing a comparative element 4 and a detection element is formed on the surface side of a sensor base 1 and covered by a cover 35. The edge side of the cover 35 is diameter- reduced, the opening of the edge of a cylinder hole is shut off by a flow velocity deceleration member 40, and the inner space of a diameter reduction cylinder wall 47 is made a deceleration introduction chamber 38. The base end side of the cover 35 is made a diffusion chamber 41. Exhaust gas is decelerated, introduced into the deceleration introduction chamber 38, and diffused in the diffusion chamber 41 in a state in which the flow velocity does not nearly exist. The exhaust gas diffuses in the diffusion chamber 41 in the state of almost zero flow velocity, reaches the CO detection mechanism part 3, and CO detection in the exhaust gas is detected by the CO detection mechanism part 3 without receiving influence of the flow velocity.

10. 发明专利

JPH0361138B2 失效
公开(公告)号：JPH0361138B2
公开(公告)日：1991-09-18
申请号：JP1056983
申请日：1983-01-27
申请人： YAZAKI CORP
发明人： NITA HOZUMI , YASUGATA KAZUTOSHI
IPC分类号： G01N25/28 , G01N27/16

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