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21. 发明专利

JP2000274814A REMAINING WATER PRESENCE DETECTING DEVICE FOR BATH 失效
公开(公告)号：JP2000274814A
公开(公告)日：2000-10-06
申请号：JP7924399
申请日：1999-03-24
申请人： NORITZ CORP
发明人： MORISHITA ATSUHIRO , ISHIZUNO MASAMITSU , MOTOOKA HIDENORI , KUNINAKA ASAHIRO , KAWAGUCHI SATORU , OKUMURA KAZUAKI , SHIMIZU TAKEHIRO , OBAYASHI TOSHIHIKO , OBARA HIROKI , YOSHIDA AKIRA , HAMADA MAKOTO
IPC分类号： F24H1/00
摘要： PROBLEM TO BE SOLVED: To provide a remaining water presence detecting device for a bath to reliably detect the presence of remaining water in a bath tub even when a bath tub temperature sensor is situated in an unfavorable position due to the mounting miss of a connection fitment. SOLUTION: Hot water is introduced in a bath tub 10 through a connection fitment 11 mounted on a part of the side wall of a bath tub 10, and a bath tub temperature sensor 12 is mounted on a part of a connection fitment 11. In a so formed remaining water presence detecting device for a bath, prior to regular introduction of hot water in the bath tub 10, hot water is preliminarily let out. After preliminary letting-out, letting out is stopped, and during preliminary letting-out or during a stop period, a change of the detecting temperature of a bath tub temperature sensor 12 is monitored. By comparing a temperature change pattern with a remaining water presence pattern and a remaining water absence pattern, the presence of remaining water in a bath tub is decided.

22. 发明专利

JPH09243072A COMBUSTIBLE GAS DETECTOR 失效
公开(公告)号：JPH09243072A
公开(公告)日：1997-09-16
申请号：JP8470596
申请日：1996-03-12
申请人： NORITZ CORP
发明人： TSUGAWA AKIHIKO , MIYAMOTO NORIHIRO , HASEGAWA TOSHIAKI , OBAYASHI TOSHIHIKO , SUGAWARA YASUKUNI , SAEKI TAKUJI , YAMAMOTO SHIGEYA , TAKEDA NOBUHIRO , MIKI SHUNICHI , OKADA HIDEYUKI , MIURA KEIICHI
IPC分类号： F23N5/24
摘要： PROBLEM TO BE SOLVED: To precisely perform a correction of a zero point reference value by safely operating a gas combustion device without correcting the zero point reference value when the difference between the output of a CO sensor and the zero point reference value stored in a memory is abnormally large, upon request for correcting the zero point reference value. SOLUTION: A memory 40 stores the zero point reference value of the output of a CO sensor 15. A correcting part 42 safely operates a gas combustion device without correcting the zero point reference value when the difference between the output of the CO sensor 15 and the zero point reference value stored in the memory 40 is abnormally large, upon request for correcting the zero point reference value. In this case, whether the difference between the output of the CO sensor 15 and the zero point reference value is abnormally large or not may be decided depending on whether the difference is not smaller than a prescribed value or not, or a decision as to whether it is abnormally large according to a fuzzy control system. Thus, the correcting process of the zero point reference value which serves as a reference of the output from the CO sensor 15 can be accurately performed.

23. 发明专利

JPH09243071A COMBUSTIBLE GAS DETECTOR 失效
公开(公告)号：JPH09243071A
公开(公告)日：1997-09-16
申请号：JP8470496
申请日：1996-03-12
申请人： NORITZ CORP
发明人： TSUGAWA AKIHIKO , MIYAMOTO NORIHIRO , HASEGAWA TOSHIAKI , OBAYASHI TOSHIHIKO , SUGAWARA YASUKUNI , SAEKI TAKUJI , YAMAMOTO SHIGEYA , TAKEDA NOBUHIRO , MIKI SHUNICHI , OKADA HIDEYUKI , MIURA KEIICHI
IPC分类号： F23N5/24
摘要： PROBLEM TO BE SOLVED: To precisely correct a zero point reference value in a CO sensor by correcting the zero point reference value after recognizing that the atmosphere temperature of a temperature sensor is located within a prescribed range and the degree of variable acceleration of the output of the CO sensor is lower than a prescribed value when a correction request is emitted. SOLUTION: A temperature sensor 16 detects the atmosphere temperature of a CO sensor 15. A memory 26 stores the zero point reference value of the output of the CO sensor 15. A correcting part 28 stores, when a correction request for the zero point reference value is emitted, the output of the CO sensor 15 in the memory 26 as the zero point reference value under conditions where the detected temperature of the temperature sensor 16 is located within a prescribed range of temperature and the degree of variable acceleration of the output of the CO sensor 15 is lower than a prescribed value. Thus, a zero point adjustment can be prevented during a heat radiation after combustion is stopped or in an unstable condition just after the start of combustion, and the zero point can be adjusted in a stable condition while the combustion of a gas combustion device is stopped. Accordingly, the zero point reference value can be corrected to a precise and stable value.

24. 发明专利

JPH06313565A HOT WATER HEATING SYSTEM 失效
公开(公告)号：JPH06313565A
公开(公告)日：1994-11-08
申请号：JP12517893
申请日：1993-04-28
申请人： NORITZ CORP
发明人： SATO YASUHIKO , OBAYASHI TOSHIHIKO , UCHIDA KEIICHI
IPC分类号： F24D3/10 , F24D3/00
摘要： PURPOSE:To ebbect water-filling surely in a circulation line by determining whether or not the water filling of the circulation line comes to an end based on a detected estimated flow rate from ON by a middle water level detection means up to ON by high water level detection means and a specified differential water quantity between a value over a middle water level and a value less than a high water level. CONSTITUTION:A tank 11 is provided with a low water level detection means 16 which is turned ON at a specified low water level and over and a middle water level detection means 17 which is turned ON over a specified middle water level higher than the low water level and a high water level detection means 18 which is turned ON over a specified high water level higher than the middle water level. A water supply means 9 is opened so as to fill up water in a circulation line 10. The end of water filling in the circuration line 10 is determined based on an added up flow rate detected from a point of time when the middle water level detection means 17 is turned ON up to a point of time when the high water level detecting means 18 is turned ON and a specified differential water quantity in the tank 11 at the middle water level and over and the high water level and below. This construction makes it possible to fill up water surely in the circulation line.

25. 发明专利

JPH05149568A TAP-CONTROLLED HOT-WATER SUPPLYING APPARATUS 失效
公开(公告)号：JPH05149568A
公开(公告)日：1993-06-15
申请号：JP33935591
申请日：1991-11-29
申请人： NORITZ CORP
发明人： OBAYASHI TOSHIHIKO
IPC分类号： F24D17/00
摘要： PURPOSE:To reduce energy loss by controlling a circulating flow rate based on a difference between an inlet water temperature and a warm-keeping set temperature. CONSTITUTION:When a circulating water temperature is increased by combustion in a burner 3 and the absolute value of a difference between a warm-keeping set temperature and an inlet water temperature has become a second predetermined value or less, the burner 3 is put off and warm-keeping operation is continued for a given period of time set by a timer in a CPU 14. When a difference between the warm- keeping set temperature and the inlet water temperature is lower than a first predetermined value, the flow rate is not regulated and combustion is not started while a condition is retained as it is for a given period of time set in the timer. When a given period of time has elapsed under a condition that the absolute value of the difference between the warm-keeping set temperature and the inlet water temperature is lower than the second predetermined value, a water amount servo valve 13 is controlled to retain the amount of circulating water in a second set flow rate lower than a first set flow rate whereby the amount of dissipating heat from a piping is reduced and the working amount of the circulating pump is reduced. According to this method, energy loss can be reduced.

26. 发明专利

JPH05149567A TAP-CONTROLLED HOT WATER SUPPLYING APPARATUS 失效
公开(公告)号：JPH05149567A
公开(公告)日：1993-06-15
申请号：JP33935491
申请日：1991-11-29
申请人： NORITZ CORP
发明人： OBAYASHI TOSHIHIKO
IPC分类号： F24D17/00
摘要： PURPOSE:To reduce energy loss by reducing a set temperature automatically when the using frequency of hot water is low while a circulating pump is put ON/OFF. CONSTITUTION:When the stopping condition of supplying hot water is elapsed for a predetermined period of time, a controller 13 effects save operation, circulating hot water while reducing a warm-keeping set temperature by a predetermined value. When the stopping condition of hot water supplying, in which a hot water supplying cock 24 is being closed until a time when the save operations of a predetermined time are finished, is continued, the hot water supplying cock 24 is decided that it is not opened for a long period of time and circulating and warm-keeping operation is stopped. Accordingly, the circulating and warm-keeping operation in accordance with the employing frequency of hot water supplying can be effected. In this case, the circulating and warm-keeping operation, in which a warm-keeping set temperature is high, is effected when the employing frequency of hot water supplying is high to permit the tap-controlled supplying of high-temperature hot water while the warm- keeping set temperature in the circulating and warm-keeping operation is reduced when the frequency is low whereby unnecessary combustion is restrained. According to this method, energy loss can be reduced.

27. 发明专利

JPH055531A HOT WATER CIRCULATING TYPE HEATING DEVICE 失效
公开(公告)号：JPH055531A
公开(公告)日：1993-01-14
申请号：JP15690191
申请日：1991-06-27
申请人： NORITZ CORP
发明人： SHIMIZU MINORU , OBAYASHI TOSHIHIKO
IPC分类号： F24D3/00 , F24H1/10
摘要： PURPOSE:To restrict a consumption amount of gas under an anti-freezing mode for a hot water circulating type heating device and to prevent a problem of forming dew at fins of a heat exchanger. CONSTITUTION:In the case that a water temperature (th) within a hot water circulation passage 12 is not higher than a surplus heating prevention temperature (t2) and an inner timer 36 is timed up irrespective of the fact that a combustion control under a supplying of a minimum small amount of gas required for preventing a freezing is continued for a specified period of time T0 at a controller 38, the controller part 38 releases a small amount combustion control, proportionally combustion controls of a gas burner 16 with a predetermined temperature higher than the surplus heating preventing temperature (t2) being applied as a target value, and a water temperature in the hot water circulation passage 12 is forcedly increased up to the surplus heat preventing temperature (t2). With such an arrangement, a fine volume combustion control is prevented from being continued for a long period of time.

28. 发明专利

JPH02192512A FORCED FEED AND DISCHARGE TYPE COMBUSTION DEVICE 失效
公开(公告)号：JPH02192512A
公开(公告)日：1990-07-30
申请号：JP913489
申请日：1989-01-17
申请人： NORITZ CORP
发明人： OBAYASHI TOSHIHIKO
IPC分类号： F23N1/00 , F23N1/02
摘要： PURPOSE:To prevent worsening of combustibility due to the influence of a feed air temperature by a method wherein a discharge cylinder and a feed cylinder are formed in a double-pipeform manner, the number of revolutions of a fan is stepwisely increased from low rotation to the predetermined number of revolutions responding to a combustion amount and is finally controlled to the predetermined number of revolutions. CONSTITUTION:A feed cylinder 7 is concentrically located outside an discharge cylinder 6 to form a double-pipeform feed and exhaust cylinder 8. The optimum number of revolutions (stable combustion state) of a fan 9 responding to a combustion amount G of a burner 4 is predetermined as the predetermined number of revolutions. When ignition is detected, a combustion amount computing means 24 computes a combustion amount, and a clock pulse generating means 19 is actuated. A first number of revolutions set means 18 outputs the predetermined number of revolutions responding to a combustion amount, a second number of revolutions set means 20 outputs the set number of revolutions according to an output pulse from a clock pulse generating means 19, and a fan 9 is controlled to the set number of revolutions outputted from the second number of revolutions set means 20. When a feed air temperature during the initial stage of ignition is low, the number of revolutions is gradually increased from low rotation to prevent lifting of flame.

29. 发明专利

JP2002195658A HEAT EXCHANGER 失效
公开(公告)号：JP2002195658A
公开(公告)日：2002-07-10
申请号：JP2000395535
申请日：2000-12-26
申请人： NORITZ CORP , TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK
发明人： TAKEDA NOBUHIRO , MIKI SHUNICHI , OBAYASHI TOSHIHIKO , SATO YASUHIKO
IPC分类号： F24H9/00 , F28F9/013
摘要： PROBLEM TO BE SOLVED: To provide a heat exchanger in which durability is enhanced, while reducing noise incident to vibration, by suppressing vibration of a heat-receiving pipe while keeping the feature of the heat exchanger that the heat receiving pipe is secured to the case or cantilevered, only at both connection end parts for water supply and hot water delivery, thereby suppressing cracks at the welded part of the heat receiving pipe generated due to aging. SOLUTION: The heat exchanger comprises a heat-receiving pipe unit 20 for heat exchange, and a case 10 for containing the heat receiving pipe unit 20, wherein the heat receiving pipe unit 20 is supported fixedly on the side wall 11 of the case 10, only at connection end parts 21a, 22a for water supply and connection end parts 21b and 22b for hot water delivery. The case 10 is fixed directly or indirectly with a resilient holding piece 50, which comes into contact with the case 10 to urge the case 10.

30. 发明专利

JP2002162118A HIGH-TEMPERATURE HOT-WATER CLEANING SYSTEM 失效
公开(公告)号：JP2002162118A
公开(公告)日：2002-06-07
申请号：JP2000357220
申请日：2000-11-24
申请人： NORITZ CORP
发明人： OKUMURA KAZUAKI , OBAYASHI TOSHIHIKO , KAWAGUCHI SATORU , TANIGUCHI YASUKO
IPC分类号： F24H9/00
摘要： PROBLEM TO BE SOLVED: To allow high-temperature cleaned hot water to be instantly supplied from a water tap faucet without reducing the life of a water-purifying filter material, and to remove chlorine at a water supply stage from the water tap faucet in a chlorine- containing state during circulation heating. SOLUTION: Inflow from an inlet pipe 11 is heated by a water heater 2 and high- temperature water is supplied to a hot water outflow pipe 12. High-temperature water supplied into a gap section 36 of a water-purifying device 3a from a hot water inlet 33 is returned from a second hot water outlet 35 by the operation of a circulation pump 142 for flowing to piping 14, and is returned to the water heater through a water inlet pipe for reheating. During such a circulation heating, high-temperature hot water is not permitted to pass the water-purifying filter material 32, and at the same time the water-purifying filter material is heated by high-temperature hot water in a gap. When a high-temperature hot water outflow water tap faucet 4 is opened during circulation heating, high-temperature hot water in the gap passes through the water-purifying filter material, contained chlorine is removed for the first time for purification, and high-temperature purified hot water after purification is outputted from the high-temperature hot water outflow water tap faucet through a first hot water outlet 34 and a hot water outflow connection pipe 13.

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