| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Pressure feedback signal to optimise combustion air control | US09761424 | 2001-01-16 | US20010032571A1 | 2001-10-25 | Michael Howlett; Gordon Alexander Murray; William E. Crowle |
| A novel method of combustion air control for multiple burner furnaces, whereas a pressure transducer is located in the air piping downstream of each zone air flow control device. The pressure transducer sends a feedback signal to a pressure control loop that is in a logical cascade from the furnace temperature control loop. The pressure control loop repositions the air flow control device to compensate for changes in both downstream and upstream conditions. Output from the temperature control loop is interpreted by the pressure control loop as a changing remote set-point value. In one embodiment, the system is ideally suited to compensate for the pressure drop changes that occur across a zone air flow control valve, when flow rate changes occur as burners are started or stopped, thus providing a substantially higher turndown ratio and better control at low fire settings. | ||||||
| 162 | Burner control | US09435288 | 1999-11-05 | US06299433B1 | 2001-10-09 | Gautam Gauba; Charles Edward Benson; Johannes H. J. Thijssen; Stephan Erwin Schmidt; Scott MacAdam |
| A method and apparatus for controlling the operation of a burner apparatus are provided via the flame intensity of combustion reaction mixtures of oxidant and fuel gas. | ||||||
| 163 | Burner air/fuel ratio regulation method and apparatus | US09436011 | 1999-11-09 | US06213758B1 | 2001-04-10 | Michael G. Tesar; Michael P. Bria |
| Control system and method for regulating the air/fuel mix of a burner for a web dryer or a regenerative or recuperative oxidizer, for example. Differential air pressure is monitored between the air chamber of the burner and the enclosure into which the burner fires (such as a flotation dryer or the combustion chamber of a regenerative thermal oxidizer). Fuel flow is monitored by a differential pressure measurement between the fuel chamber of the burner and the enclosure into which the burner fires. These measurements are compared to predetermined values, and the fuel flow and/or air flow to the burner is regulated accordingly. | ||||||
| 164 | Fluid control assembly | US50838 | 1998-03-30 | US5988215A | 1999-11-23 | David D. Martin; Douglas W. Ray |
| A fluid control assembly that includes fluid valving, fluid regulation, automatic safety shut-off valving and manual shut-off valving in one assembly, a novel fluid control unit that integrates the above functions in one unit, and a novel ignitor and a novel seal and diaphragm for use in the assembly. | ||||||
| 165 | Combined fan and ignition control with selected condition sensing apparatus | US742236 | 1996-10-31 | US5902099A | 1999-05-11 | Mitchell R. Rowlette; Ronald E. Garnett; Mark A. Eifler |
| An electric control is shown adapted for use with gas furnaces which controls fan motors, ignition controls and a gas valve based on inputs from a room thermostat, limit switches, a flame probe, a flame roll-out probe, and a condensate sensor. A roll-out detection circuit utilizing flame rectification includes a multidirectional roll-out probe 16 coupled to a microcontroller (U2) through an inverter (U3) to provide both fault both protection and fault identification. A condensate sensor (20) in the form of a conductive condensate sensor member is also coupled to the microcontroller (U2) through an inverter (U3) to detect the presence of condensate build-up. | ||||||
| 166 | Gas burner monitor and diagnostic apparatus | US819540 | 1997-03-17 | US5761092A | 1998-06-02 | John E. Bunting |
| A gas burner operation monitoring apparatus for enabling convenient diagnosis of gas burner and control problems. The invention is a temporarily attached device that collects and stores information concerning the key functions indicative of an gas burner's operation. If a fault occurs, the apparatus generates a signal to indicate to a downstream microprocessor, if such is connected, that a problem has occurred. This eliminates the need for the technician to randomly replace parts until the problem is located. The system monitors the status of the thermostat or aquastat; the presence and the level of voltage being sent to the main gas valve; the pressure of gas at the inlet and outlet of the main gas valve and either the temperature on the outside of the vent stack pipe or the presence and quality of flame at the main gas burner. The device also provides a signal in the event of a fault that can be connected to a downstream microprocessor that, in turn, can activate various warning devices. | ||||||
| 167 | Systems and methods for controlling a draft inducer for a furnace | US552943 | 1995-11-03 | US5676069A | 1997-10-14 | Robert K. Hollenbeck |
| Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a motor for driving a fan for inducing a draft in the furnace that causes a pressure drop across the heat exchanger of the furnace. A memory stores information including a table of predefined speed/torque values for defining a set of speed/torque curves for operating the motor. A pressure switch provides a pressure signal representative of a reference pressure across the heat exchanger and a processor determines the speed and torque of the motor when the pressure drop corresponds to the reference pressure. In response to the determined motor speed and motor torque, the processor retrieves a parameter defining at least one delta value from the memory. The processor adapts the predefined speed/torque values as a function of the delta value thereby to define the speed/torque curves corresponding to a desired pressure drop. A control circuit generates a motor control signal in response to the defined speed/torque curves to cause the motor to operate as a function of the determined motor speed and motor torque for controlling the draft induced in the combustion chamber. | ||||||
| 168 | Induced draft combustion water heater | US641710 | 1996-05-02 | US5636598A | 1997-06-10 | H. Jack Moore, Jr. |
| A water heater includes a tank and an exhaust blower is located below the tank and connected to the exhaust line to draw the combustion products by suction through the coil-shaped heat exchanger, through the combustion gases conduit and through the combustion chamber and to draw fuel and air into the burner through the inlet conduit. | ||||||
| 169 | Control of staged combustion, low NO.sub.x firing systems with single or multiple levels of overfire air | US578254 | 1995-12-26 | US5626085A | 1997-05-06 | Richard E. Donais; Todd D. Hellewell; Paul D. Kuczma; Jonathan S. Simon |
| A control system for a fuel-fired furnace and more specifically the control of the stoichiometric ratio of the combustion process occurring within the furnace of a steam generating power plant. The control system, when so employed, is capable of regulating the distribution of air flow to the combustion process such that the formation of oxides of nitrogen are maintained at acceptable levels. The control system includes in general a stoichiometric subsystem that determines the mass flow rate of air required to maintain the stoichiometric ratio within the combustion process; an override protection subsystem which ensures control precedence of the windbox-to-furnace pressure differential over the stoichiometry subsystem; and an overfire air subsystem that acts to apportion air flow amongst the various levels of overfire air within the boiler. | ||||||
| 170 | Systems and methods for controlling a draft inducer for a furnace | US402998 | 1995-03-09 | US5616995A | 1997-04-01 | Robert K. Hollenbeck |
| Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a fan for moving combustion chamber gases for inducing a draft in the furnace combustion chamber that causes a pressure drop across a heat exchanger. The density of the gases flowing across the heat exchanger and the fan differs from a first operating state of the furnace to a second operating state of the furnace. A motor drives the fan in response to a motor control signal so that different motor speeds result as a function of the density of the gases flowing across the fan. A control circuit generates the motor control signal as a function of a first set of speed/torque curves until a speed signal indicates that the motor has reached a predetermined speed. After the speed signal indicates that the motor has reached the predetermined speed, the control circuit generates the motor control signal as a function of a second set of speed/torque curves. Thus, the motor will operate in accordance with the first speed/torque curves when the furnace is in the first operating state and in accordance with the second speed/torque curves when the furnace is in the second operating state. | ||||||
| 171 | Intelligen transient eliminator for an ignition system | US70727 | 1993-06-02 | US5456597A | 1995-10-10 | Mark M. Lazar; Marvin A. Lucas |
| The present invention relates to an intelligent transient eliminator which allows a gas ignition system to prevent gas valves from being turned off by a pressure switch in response to a transient pressure wave. The transient eliminator is preferably provided in a HVAC unit or furnace which burns a fuel such as natural gas. An ignition control system employing an intelligent transient eliminator provides a secondary relay across the pressure switch. The secondary relay is controlled by a signal to an ignitor in the furnace. The secondary switch is tested before energizing the inducer blower in the system. | ||||||
| 172 | Gas burning apparatus | US36693 | 1993-03-25 | US5429111A | 1995-07-04 | Yoshio Akamatsu |
| A gas burning apparatus detects a gas pressure existing between a nozzle for supplying gas to a burner and an adjusting valve for adjusting combustion amount by means of a pressure sensor. A central control device, including a microcomputer, drives the adjusting valve so as to obtain a combustion amount desired by a user. This construction controls thermal power accurately. In addition, a different kind of gas stored by the microcomputer can be used by operating a switch corresponding to the kind of gas to be used. | ||||||
| 173 | Draft inducer air flow control | US25371 | 1993-02-26 | US5418438A | 1995-05-23 | Robert K. Hollenbeck |
| A control circuit for a motor driving a fan for inducing a draft in the exhaust of a heating, ventilating and air conditioning (HVAC) system. The control circuit may be used in conjunction with either a variable pressure sensor or one or two discrete pressure sensors. A controller receives information defining the pressure set point. The information may be from a switched register or low or high pressure input signals. The motor speed/torque is increased until the pressure set point is reached. | ||||||
| 174 | Pilot pressure switch and method for controlling the operation of a furnace | US117308 | 1993-09-07 | US5347981A | 1994-09-20 | Malcolm Southern; Walter Wolenski |
| A pilot pressure switch for a furnace detects the fluid pressure within the pilot line for a pilot flame, and upon the fluid pressure in the pilot line exceeding a predetermined value, an electrical signal from a thermostat may be passed to a furnace blower control to operate the furnace main blower and furnace vent blower. | ||||||
| 175 | Fuel gas burning control method | US864799 | 1992-04-07 | US5307620A | 1994-05-03 | Sumio Hamahira; Yoshikazu Maki |
| A method of safely controlling a burning of a fuel gas in a combustor in response to the pressure change in a fuel gas sealed in a fuel gas passage between a fuel gas supply source and the combustor communicated with the fuel gas supply source, the method comprising the steps of sealing a fuel gas in the fuel gas passage before supply to the combustor prior to the start of the operation of the combustor, detecting a pressure change in the fuel gas sealed in the fuel gas passage, controlling the supply of the fuel gas to the combustor in response to a signal representing the detected pressure change, and interrupting start of operation of the combustor when a pressure change in the sealed fuel gas is detected prior to the start of the operation of the combustor. Abnormal burning such as an explosion due to fuel gas leakage is prevented. | ||||||
| 176 | NO.sub.x Emissions advisor and automation system | US24857 | 1993-02-26 | US5280756A | 1994-01-25 | Donald E. Labbe |
| A method and system for controlling and providing guidance in reducing the level of NO.sub.x emissions based on controllable combustion parameters and model calculations while maintaining satisfactory plant performance and not causing other harmful consequences to the furnace. To implement such a system, boiler control values of flow, pressure, temperature, valve and damper positions in addition to emission sensors for data associated with the production of NO.sub.x, O.sub.2, CO, unburned carbon and fuel. This information is received from standard sensors located throughout a boiler which are connected either to a distributed control system (DCS), or another data acquisition system which is time coordinated with the DCS. The DCS passes this information to a computing device which then processes the information by model based optimization simulation programs, also referred to as the NO.sub.x Emissions Advisor. The presentation of recommendations to the operator consists of a series of graphic displays hierarchically arranged to present the operator with a simple summary that has available more detail support displays at lower levels. The NO.sub.x emissions automation system transmits the recommended positions to the controlling devices including furnace air dampers and coal feeders. | ||||||
| 177 | Furnace monitoring and thermostat cycling system for recreational vehicles and marine vessels | US4268 | 1993-01-14 | US5269458A | 1993-12-14 | David Sol |
| Recreational vehicles and marine vessels provide for cabin environment heating by a thermostatically controlled furnace which is typically fueled by a portable supply of liquefied petroleum gas and electrically powered by an on board battery. The invention detects and corrects for the situation where the furnace does not light by cycling the thermostat to allow the furnace to relight. The device will allow for three trials before the thermostat is locked out in an off position to prevent the furnace from blowing cold air and draining the battery system. The device provides for centrally located indication of the current temperature and a resettable display of the furnace retrial and lockout condition status, as well as the gas pressure as delivered to the furnace. | ||||||
| 178 | Adaptive furnace control using analog temperature sensing | US973794 | 1992-11-09 | US5248083A | 1993-09-28 | Wilmer L. Adams; Ralph H. Torborg |
| An adaptive furnace controller utilizing analog temperature sensing to maintain a constant preselected temperature in the heat exchanger during operation. The adaptive furnace control measuring heat exchanger temperature and regulating a controllable valve to adjust burner firing rate, thereby holding heat exchanger operating temperature constant. Further, creating constant on/off times based on the previous cycle on/off times of the furnace by regulating circulation blower speed. By increasing blower speeds to shorten "on" times or decreasing blower speeds to increase "on" times, and thereby achieving optimum cycle times. | ||||||
| 179 | Furnace pressure control method | US857874 | 1992-03-26 | US5244147A | 1993-09-14 | Masaaki Furukawa |
| A method of controlling the pressure in an incinerator for incinerating municipal refuse, industrial waste, etc. Exhaust gas from an incinerator typically passes through an exhaust gas cooler and an exhaust gas treating device and then discharged into the atmosphere by the action of an induced draft fan. In a method of controlling the pressure in such an incinerator for incinerating municipal refuse, industrial waste, etc. gas, e.g., part of the flow of exhaust gas induced by the induced draft fan or air taken in from the atmosphere, is added to a gas flow path upstream of the inlet of the induced draft fan through an addition gas line provided with an addition gas control damper. The addition gas control damper is controlled on the basis of an output from a furnace pressure controller such that when the furnace pressure is relatively high, the flow rate of the addition gas is reduced, whereas, when the furnace pressure is relatively low, the flow rate of the addition gas is increased. | ||||||
| 180 | Method of controlling combustion of fluidized-bed incinerator | US777325 | 1991-11-25 | US5226374A | 1993-07-13 | Miki Yamagishi; Takashi Yokoyama; Yasuo Suzuki; Haruhito Tsuboi; Takashi Noto; Masaaki Kawakami |
| The present invention discloses a method of controlling combustion of a fluidized-bed incinerator. In a fluidized-bed incinerator (5), a method of controlling combustion of the fluidized-bed incinerator comprises measuring a supply rate of incineration waste by a supply rate measuring unit (11) using a photoelectric element (1) arranged on a shoot (2) for supplying incineration waste (3) from a dust feeder (4) to the incinerator (5), and when the supply rate of incineration waste is higher than a predetermined value, decreasing a supply rate of incineration waste of the dust feeder 4 to suppress a combusting operation, increasing an induced gas rate of an exhaust gas induced blower (9) of the incinerator to suppress an increase in an incinerator internal pressure decreasing a flow rate of fluidizing air of a forcing blower (7) to suppress a combusting operation, or increasing a flow rate of a blower (8) for supplying air to a free board portion to prevent production of an unburnt gas. | ||||||
QQ群二维码
意见反馈
意见反馈