RINNAI CORPORATION Patent applications |
Patent application number | Title | Published |
20160123476 | SINGLE COIL DUAL SOLENOID VALVE - A single coil dual solenoid valve includes: first and second moving cores having connected to respective ends thereof first and second valve bodies; first and second plunger tubes having slidably inserted thereinto the first and second moving cores, respectively; first and second stationary cores disposed at respective opposite ends of the first and second plunger tubes so as to lie opposite to the first and second moving cores, respectively; a first frame disposed to connect the first and second stationary cores; a second frame disposed to connect one end of the first and second plunger tubes, respectively; and a single solenoid disposed to enclose one of the first and second plunger tubes. By activating the solenoid, the first and second moving cores are sucked to move toward the respective first and second stationary cores, whereby the first and second valve bodies are changed over. | 05-05-2016 |
20160116160 | COMBUSTION PLATE - A combustion plate is for use in a totally aerated combustion burner in which a plate main body made of ceramic has formed therein a multiplicity of flame holes for ejecting a premixed gas. The plate main body is provided, in a lattice shape, with non-flame-hole sections free of flame holes. Each of those sections of the plate main body which are enclosed by the non-flame-hole sections constitutes a collective flame-hole section having formed therein in a crowded manner a plurality of flame holes. Flame holes formed in those peripheral portions of the collective flame-hole sections which are adjacent to the non-flame-hole sections are smaller in diameter than the diameter of the flame holes formed in those portions of the collective flame-hole sections which are inner than the peripheral portions. | 04-28-2016 |
20160109119 | TUBULAR BURNER - A tubular burner includes: a mixing tube having an inlet port into which a fuel gas and primary air flow; and a flame hole member having a plurality of flame holes and being fitted into a front end portion of the mixing tube. The flame holes of the flame hole member are made up of a central main flame hole and a plurality of subsidiary flame holes positioned around, and each being smaller than, the central main flame hole. In an annular region of the flame hole member defined between an outer periphery of the flame hole member and the central main flame hole, a plurality of non-flame-hole regions which are free from formation of the subsidiary flame holes are provided at a circumferential distance from one another. The plurality of the subsidiary flame holes are formed in each of flame hole regions defined between the non-flame-hole regions. | 04-21-2016 |
20160084399 | SOLENOID VALVE - A solenoid valve has: a valve body; a moving core with a valve body on one end; a guide tube slidably enclosing the moving core; a stationary core disposed in an inner circumference of an opposite end portion of the guide tube so as to face an opposite end of the moving core; a valve spring to urge the moving core in a direction away from the stationary core; an electromagnetic coil disposed to enclose the guide tube; and a magnetic plate disposed on an opposite end of the guide tube having a caulked portion. The guide tube has a caulked portion formed to fix in position the stationary core by engagement of the caulked portion with a recessed groove formed on an outer periphery of the stationary core. When the stationary core is fixed in position by the caulked portion, that surface of the stationary core which faces the magnetic plate is either flush with, or is protruding beyond, the opposite end of the guide tube. | 03-24-2016 |
20150369479 | FLAT BURNER - A flat burner has a mixing tube portion with an inlet port of a cross section elongated in a vertical direction and a throat portion lying adjacent to a back of the inlet port and having a cross section smaller than that of the inlet port. A distribution chamber portion introduces a mixture of a fuel gas ejected from a gas nozzle disposed to face the inlet port and primary air flowing from the inlet port. The throat portion is formed at a position in which a sectional center thereof is offset in one of the upward and downward directions relative to a sectional center of the inlet port. The gas nozzle is disposed such that an axis of the nozzle hole of the gas nozzle passes through a vertical position that is offset from the sectional center of the throat portion toward the sectional center of the inlet port. | 12-24-2015 |
20150369478 | FLAT BURNER - A flat burner has at an upper end thereof a rectangular flame port portion which has a straightening member with a plurality of straightening plates laterally disposed in parallel with one another. The straightening member has contact portions in which the straightening plates are brought into contact with one another at a plurality of longitudinal positions to thereby longitudinally segregate the flame port passages that are defined by each of the straightening plates. Out of the contact portions of the laterally inside straightening plates defining the laterally center-side flame port passages of the flame port portion, at least lower half of the contact portions that are positioned at least in predetermined longitudinal portions is formed into an inverse triangle as seen in the lateral direction. The predetermined longitudinal portions are those in which the inlet direction of flow of the fuel-air mixture from the distribution chamber portion into the flame port portion longitudinally inclines relative to a vertical direction beyond a predetermined angle. | 12-24-2015 |
20150354832 | HOT WATER SUPPLY APPARATUS - A hot water supply apparatus has: a thermo-sensitive valve which is connected in parallel to a cold water delivery pipe and a hot water delivery pipe and which is closed when the hot water temperature to flow inside the valve is above a predetermined temperature to thereby shut off communication between the cold water delivery pipe and the hot water delivery pipe; and a circulation pump. By operation of the circulation pump, water circulation takes place from a heat exchanger through the hot water delivery pipe, a return pipe, the circulation pump, and a cold water supply pipe back to the heat exchanger. When the thermo-sensitive valve is open, water circulation takes place also through the thermo-sensitive valve. Instantaneous hot water supply operation is finished when an amount detected by a flow sensor falls below a predetermined amount during the instantaneous hot water supply operation. | 12-10-2015 |
20150354810 | PREMIXING APPARATUS - A premixing apparatus for mixing a fuel gas with air has an air resistance changeover device for changing over a flow resistance in the air feed passage and a gas resistance changeover device for changing over a flow resistance in the gas feed passage. The air resistance changeover device includes a venturi portion provided in that part of the air feed passage which is on a downstream side of the butterfly valve. A gas chamber is provided in that part of the gas feed passage which is on a downstream side of the gas resistance changeover device. A gas suction portion is configured such that the fuel gas is sucked from the gas chamber into an entire circumference of that part of the air feed passage which is adjacent to a downstream side of the venturi portion. | 12-10-2015 |
20150184849 | Rich-Lean Burner - A rich-lean burner with a lean flame port, a blind clearance, and a rich flame port has: a burner main body with a pair of burner-main-body side plates on both lateral sides thereof; a burner cap with a burner-cap side plate covering the burner main body from at least one lateral outside thereof; and a straightening member with straightening plates to divide the lean flame port into laterally disposed zones. Upper ends of the burner-main-body side plates are below upper ends of the burner-cap side plate and of the straightening plates. The straightening member has a partition plate which is located laterally outside an outer straightening plate contiguous to the blind clearance and which extends upward beyond the burner-main-body side plates. The blind clearance is defined between the partition plate and the outer straightening plate, and the rich flame port is defined between the partition plate and the burner-cap side plate. | 07-02-2015 |
20150184848 | Tubular Burner - A tubular burner has a mixing tube which includes a rear-end inlet port into which a fuel gas and primary air flow, and a flame hole member having a plurality of flame holes and being fitted into a front end region of the mixing tube. The flame hole member is prevented from getting pulled out of position, without applying an undue force thereto. At a front end of the mixing tube a cylindrical elongated section is disposed in a manner to be elongated beyond a front face of the flame hole member. A convex portion is formed in the cylindrical elongated section so as to protrude diametrically inward of the cylindrical elongated section to prevent the flame hole member from getting pulled out of position in a forward direction. | 07-02-2015 |
20150136863 | ROOM HEATER - A room heater is operated on receiving an on-command from a thermostat when a detected temperature detected by a second room-temperature detector falls below a first reference temperature, and is stopped on receiving an off-command when the temperature detected by the second room-temperature detector is above a second reference temperature that is set higher than the first reference temperature or when the thermostat is manually operated to be switched off. A setting temperature for temperature control to be carried out when the on-command is received again is updated according to a difference between the set temperature and the temperature detected by the first room-temperature detector on receiving the off-command. When the off-command is received before passing a predetermined period of time after receiving the on-command, the updating of the set temperature is prohibited if the temperature detected by the first room-temperature detector is below a predetermined minimum lower reference temperature. | 05-21-2015 |
20150136861 | ROOM HEATER - A room heater is controlled according to a difference between a detected temperature detected by a first room-temperature detector and a predetermined set temperature. When a detected temperature detected by a second room-temperature detector falls below a first reference temperature, the operation is started on receiving an on-command from a thermostat. When the detected temperature by the second room-temperature detector has raised above a second reference temperature which is set higher than the first reference temperature, the operation is stopped on receiving an off-command from the thermostat. The room heater is controlled to raise a set temperature by a predetermined value if it does not receive the off-command by passing of a first predetermined period of time after having received the on-command or if the detected temperature detected by the first room-temperature detector has been at the set temperature or higher without receiving the off-command for a second predetermined period of time. | 05-21-2015 |
20150096504 | CIRCULATING-TYPE HOT-WATER SUPPLY DEVICE - A circulating-type hot-water supply device ( | 04-09-2015 |
20140350729 | Combustion Control System - A combustion control system includes: a memory section having stored therein each control data corresponding to each of the models; a switch input section designating setting contents of each model, the setting contents being set for each of the setting items relating to the operation by switched-on/switched-off state of each switch; and an instruction section which instructs the combustion control based on control. The switch input section is provided with at least two groups each being made up of a plurality of switches. An abnormality distinguishing section is provided to distinguish whether on-off states of one group of switches and on-off states of the other group of switches coincide with each other. When the on-off states are distinguished not to coincide with each other, an instruction is given to stop the combustion control. Incomplete combustion is thus prevented even at the time of failure or wrong operation of switches. | 11-27-2014 |
20130337390 | Combustion Plate - A combustion plate for use in a totally aerated combustion burner has a ceramic plate body with a multiplicity of flame holes formed therein for ejecting a premixed gas. The plate body is provided, in a lattice shape, with non-flame-hole portions having no flame holes therein. Each of such regions of the plate body as are enclosed by the non-flame-hole portions constitutes a collective flame-hole portion having formed therein a plurality of flame holes. It is so arranged that flame lifting can be effectively prevented in the flame holes on the periphery of the collective flame-hole portions. Along each of such sides of the non-flame-hole portions as are adjacent to each of the collective flame-hole portions, outside flame holes are formed at a predetermined spacing therebetween in a longitudinal direction of the non-flame-hole portions. This predetermined spacing is greater than a spacing, in the longitudinal direction of the non-flame-hole portion. | 12-19-2013 |
20130264037 | LATENT HEAT EXCHANGER AND WATER HEATER - A latent heat exchanger ( | 10-10-2013 |
20130181060 | HOT-WATER STORAGE TYPE HEATING UNIT - In a hot-water storage type heating unit | 07-18-2013 |
20130168302 | HOT-WATER SUPPLY SYSTEM - A hot-water supply system includes a switching valve ( | 07-04-2013 |
20130164697 | Combustion Apparatus - A combustion apparatus has a burner, a combustion box containing therein a heat exchanger, an exhaust passage in fluid communication with the combustion box, a fan for supplying the burner with combustion air, and a predetermined length of air suction duct in fluid communication with a suction opening formed in a fan casing. The air suction duct has: on a downstream end thereof, an outlet cylindrical portion which is smaller in diameter than a diameter of the suction opening in the fan casing and which lies opposite to the suction opening; and a flange portion which overhangs radially outward from a perimeter of the air suction duct adjacent to the outlet cylindrical portion into contact with that peripheral portion of the fan casing which forms the suction opening. The flange portion is provided with an auxiliary suction opening in fluid communication with a space surrounding the outlet cylindrical portion. | 06-27-2013 |
20130112384 | HEAT EXCHANGER - Provided are a heat exchanger that does not impede downsizing and removes water in the heat absorbing pipe adequately with a simple configuration even when the reduction in diameter of the heat absorbing pipe is made. A heat exchanger | 05-09-2013 |
20120292543 | SOLENOID VALVE CONTROL DEVICE - Disclosed is a solenoid valve control device provided with: a first relay ( | 11-22-2012 |
20120046801 | HOT-WATER SUPPLY SYSTEM - Each of the water heaters | 02-23-2012 |
20110315091 | HOT-WATER SUPPLY SYSTEM - When a detection temperature by a hot-water tank thermister ( | 12-29-2011 |
20110303165 | HOT-WATER SUPPLY SYSTEM - When a detection temperature by a hot-water tank thermister ( | 12-15-2011 |
20110297139 | WARM AIR FURNACE - A drain pipe | 12-08-2011 |
20110296838 | HEAT SOURCE MACHINE - A heat source machine includes: a first emission amount calculation unit | 12-08-2011 |
20110290228 | WARM AIR FURNACE - A warm air furnace prevents household articles from freezing in the case where combustion is discontinued due to lack of gas during combustion operation when a house is emptied. The warm air furnace is equipped with a retry operation controller | 12-01-2011 |
20100135829 | AIR SUPPLY FAN DEVICE - An air supply fan device including: a fan casing disposed continuously to a combustion chamber containing a gas burner therein; an air supply fan contained inside of the fan casing, for supplying burning air to the gas burner; and a motor disposed outside of the fan casing, for rotating the air supply fan. The air supply fan device comprising: a ventilation hole formed by opening a fan casing constituting wall around a motor rotary shaft of the motor connected to the air supply fan; and a diaphragm valve body which is fixed to the ventilation hole and has a through hole, through which the motor rotary shaft is inserted, opened at the center thereof. The valve body being formed into a shape such that a gap is defined between the through hole and the motor rotary shaft when the inner pressure inside of the fan casing is negative during the rotation of the air supply fan while the gap is closed in tight contact of the peripheral edge of the through hole with the motor rotary shaft when the inner pressure inside of the combustion chamber or the fan casing is positive. | 06-03-2010 |
20100122668 | STORAGE TYPE WATER HEATER - A storage type water heater comprising: a stored hot water tank; a heating unit including a heat exchanger, a gas burner, and an air supply fan; a circulation pipe line; a circulating pump; a first temperature sensor for detecting an inlet side temperature T | 05-20-2010 |
20100096103 | HEAT EXCHANGER AND WATER HEATER INCLUDING THE SAME - There is provided a heat exchanger and a water heater having the heat exchanger including a uniform thickness of tin plating layer on the inner surface of a water feeding pipe. The heat exchanger H includes copper pipes | 04-22-2010 |
20100025487 | FORCED DRAFT DIRECT VENT TYPE ROOM HEATER - The room heater has, in an outer case | 02-04-2010 |
20100025485 | FORCED DRAFT DIRECT VENT TYPE ROOM HEATER - A vent hole | 02-04-2010 |
20090314275 | WARM AIR FURNACE - A warm air furnace capable of reliably carry out the fuel consumption conserving operation notwithstanding the condition such as the heating load is provided. The warm air furnace is equipped with an ecology operation setting unit | 12-24-2009 |
20090211334 | IMPERFECT COMBUSTION DETECTING DEVICE - An imperfect combustion detecting device includes a destructive current supplying means which supplies, under a condition that it is determined by a useful life determining means that a deterioration status corresponding value matches a use limit value, destructive current to a sensor in order to melt down a part of a circuit that configures the sensor. When it is determined that the sensor is no longer capable of performing a normal CO level detecting function, the sensor is destroyed to the extent rendering the CO level detecting function of the sensor lost to an unrecoverable level. | 08-27-2009 |
20090159017 | HOT WATER SUPPLY APPARATUS - A hot water supply apparatus including: a hot-water supply pipe for guiding hot water generated by a hot-water generator to a hot-water supplying terminal; two hot-water supply temperature sensors for detecting water temperature in the hot-water supply pipe; a temperature control unit for adjusting a temperature of the hot water supplied to the hot-water supplying terminal; a sensor abnormality determining unit for determining sensor abnormality when a difference between temperatures detected by the two hot-water supply temperature sensors is larger than a predetermined permissible error; a sensor selector for selectively setting one hot-water supply temperature sensor detecting a higher temperature as a hot-water supply temperature sensor for temperature control; and a hot-water supply temperature controller for controlling the temperature control unit so that a temperature detected by the hot-water supply temperature sensor for temperature control selected from the two hot-water supply temperature sensors is matched with a set temperature. | 06-25-2009 |
20090151654 | WATER HEATER - There is provided an indoor mounting water heater in which combustion exhaust gas is discharged to the outdoors via an exhaust duct, wherein a decrease in draft force caused when the number of burner groups to be burned is reduced by a capacity changeover mechanism to decrease the combustion capacity can be prevented, and the heat efficiency can be improved. An air supply chamber | 06-18-2009 |
20090139466 | HOT WATER APPARATUS - A hot water apparatus comprises a main body thereof connected to each of water distribution devices | 06-04-2009 |