公开(公告)号：FR2488979A1

公开(公告)日：1982-02-26

申请号：FR8018239

申请日：1980-08-20

Applicant: ELECTRONICS CORP AMERICA

Inventor： CADE PHILLIP J

IPC: F23N1/00 ,  F23N5/24 ,  F23N5/00

Abstract: The condition of a furnace burner is monitored by a number of detectors. The problem of deciding which detector was operated first is overcome by an electronic control circuit. This inhibits indication of an abnormal condition for a predetermined period after starting to allow operational values to be attained to eliminate parasitic effects. A control circuit (16) monitors a series circuit of interlocks (30) and also the pilot and main fuel flows. Each monitoring circuit (34) comprises a current limiting resistor (36) in series with a luminous source of an optical coupler (38). Associated indicator circuits (18,19) each containing an LED (15) remain lit to indicate cause of stoppage of the burner. These circuits respond to signals from a control circuit.

公开(公告)号：GB1578357A

公开(公告)日：1980-11-05

申请号：GB3223979

申请日：1977-04-07

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08 ,  F23N5/18 ,  F23N5/20

Abstract: A burner control apparatus includes a timing circuit for providing two successive timing intervals of precise duration, one being a preignition timing interval and the other being an ignition timing interval. The timing circuit includes a capacitor the charging rate of which determines one of the timing intervals and the discharge rate of which determines the other timing interval. In response to a call for burner operation a blower is energized to purge the burner of potentially explosive gases during the pre-ignition timing interval. When the pre-ignition interval comes to an end relays are energized to energize a pilot fuel control and an ignition control. If a flame is sensed during the ignition interval a further relay is energized closing the ignition control and switching over from pilot to main fuel control. If no flame is sensed during this interval a lockout actuator shuts down the entire burner and energizes an alarm. If after establishment of normal burner operation the flame goes out,the cycle of two successive timing intervals is repeated.

公开(公告)号：GB2042154A

公开(公告)日：1980-09-17

申请号：GB8001912

申请日：1980-01-21

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08 ,  F23N5/18 ,  F23N5/20 ,  F23N5/24

Abstract: A burner control apparatus for use with a furnace installation that has an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in the monitored combustion chamber, and one or more devices for control of ignition and/or fuel flow. The burner control apparatus comprises lockout apparatus for de-energizing the control apparatus, a control device for actuating the ignition and/or fuel control devices, and a timing circuit that provides four successive and partially overlapping timing intervals of precise relation, including a purge timing interval, a pilot ignition interval, and a main fuel ignition interval. The present invention further includes a burner control system which verifies the proper operation of certain sensors in a burner or furnace including particularly the air flow sensor. Additionally, the present system also prevents an attempt to ignite a burner if a condition is detected which indicates that the air flow sensor has been bypassed or wedged in the actuated position.

公开(公告)号：GB1545602A

公开(公告)日：1979-05-10

申请号：GB429878

申请日：1976-03-12

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08 ,  G08B21/00

公开(公告)号：CA1053779A

公开(公告)日：1979-05-01

申请号：CA248476

申请日：1976-03-22

Applicant: ELECTRONICS CORP AMERICA

Inventor： MACDONALD MALCOLM F

IPC: G01J5/22

Abstract: A flame responsive system includes a flame sensor, flame signal generating circuitry responsive to the flame sensor and flame signal inhibiting circuitry also responsive to the flame sensor. A fast filter and a slower filter are coordinated so that total loss of flame sensor response results in rapid termination of a flame signal output from the flame signal generating circuitry while reduction of a flame sensor response below a set point causes the flame signal inhibiting circuitry to inhibit the flame signal output.

公开(公告)号：DE2806700A1

公开(公告)日：1978-08-17

申请号：DE2806700

申请日：1978-02-16

Applicant: ELECTRONICS CORP AMERICA

Inventor： CADE PHILLIP J

IPC: F23N5/18 ,  F23N5/20

Abstract: Burner control apparatus includes control devices for actuating an ignition control means, and a timing circuit for providing an ignition timing sequence of four precise intervals. The timing circuit is actuated in response to a request for burner operation and the control devices are energized in sequence and combination in response to the actuated timing circuit. Time sequential pilot flame and main flame stabilization intervals are provided. If a signal from the flame sensor is received before the end of the overlapping flame stabilization timing intervals, the control device is energized and if flame detection signal is lost a lockout circuit is energized.

公开(公告)号：BE864021A

公开(公告)日：1978-08-16

申请号：BE185225

申请日：1978-02-16

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/18 ,  F23N5/20 ,  F23N

Abstract: Burner control apparatus includes control devices for actuating an ignition control means, and a timing circuit for providing an ignition timing sequence of four precise intervals. The timing circuit is actuated in response to a request for burner operation and the control devices are energized in sequence and combination in response to the actuated timing circuit. Time sequential pilot flame and main flame stabilization intervals are provided. If a signal from the flame sensor is received before the end of the overlapping flame stabilization timing intervals, the control device is energized and if flame detection signal is lost a lockout circuit is energized.

公开(公告)号：GB1514351A

公开(公告)日：1978-06-14

申请号：GB101876

申请日：1976-01-12

Applicant: ELECTRONICS CORP AMERICA

IPC: G05D25/02

Abstract: 1514351 Automatic control of light intensity ELECTRONICS CORP OF AMERICA 12 Jan 1976 [15 Jan 1975] 01018/76 Heading G3R [Also in Division G1] The output of a light source 62 used in a monitoring system for particulate matter on a smokestack 56, is regulated by control of an electronic switch 20 in the circuit between a power source 16 and the source 62, control of switch 20 being effected by a feedback circuit 42, 28 including a sensor 40 monitoring the output of the source 62. The sensor 40 is a reversed biased semi-conductor diode and is connected in series with an adjustable resistor (72) Fig. 2 (not shown). At the beginning of each positive half cycle the lamp is energized and illuminates after a brief thermal lag. On reaching the threshold set by the adjustable resistor (72), the feedback circuit, made up of a series of transistors, switches, to turn off transistor 20. The lamp is not powered during negative half cycles, unless a further transistor is connected in the other power supply line as in Fig. 4 (not shown). It is stated that by this method, the filament is maintained at a substantially constant temperature giving spectral stability, compensation for film deposits on the lamp bulb and lower power consumption achieved.

公开(公告)号：IT7867286D0

公开(公告)日：1978-02-13

申请号：IT6728678

申请日：1978-02-13

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/18 ,  F23N5/20 ,  F23D

Abstract: Burner control apparatus includes control devices for actuating an ignition control means, and a timing circuit for providing an ignition timing sequence of four precise intervals. The timing circuit is actuated in response to a request for burner operation and the control devices are energized in sequence and combination in response to the actuated timing circuit. Time sequential pilot flame and main flame stabilization intervals are provided. If a signal from the flame sensor is received before the end of the overlapping flame stabilization timing intervals, the control device is energized and if flame detection signal is lost a lockout circuit is energized.

公开(公告)号：FR2244136B1

公开(公告)日：1976-12-31

申请号：FR7431397

申请日：1974-09-17

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/02 ,  F23N5/24 ,  F23N1/00

Abstract: A burner control system in which signals indicating the condition at various locations within the system are applied to a control circuit in the form of pulse trains, causing a continuous alternation of state of solid state switching elements therein. The system actuates a switch to open a fuel valve only when the level of the control circuit output signal is alternating, indicating that the said switching elements are operative. A comparison circuit compares the control circuit output signal with a signal denoting the condition of the fuel valve, to ensure proper operation of the fuel valve switch.