JP2011085342A - Combustion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion device of which reoperation is forbidden when the frequency of abnormal combustion reaches a prescribed number of times. <P>SOLUTION: When a combustion sensor 23 detects the abnormal combustion, a timer section 25 is started, and when the frequency of detection of abnormal combustion by a time when a measured time reaches a prescribed time, is over the prescribed frequency, a control device 3 for stopping a combustion operation and forbidding the reoperation, starts measurement of time by the timer section 25 by setting the frquency of detection of the abnormal combustion stored in a storage section 26 to the frequency stored before a non-power distribution state, when a power source is once kept in the non-power distributing state after the start of measurement of time by the timer section 25, and then the operation is restarted in a power distribution state again, thus the display of continuous incomplete combustion and reoperation can be kept in a forbidding state, and the device can be used more safety without affected by that the power source is kept in the non-power distributing state, even when the reoperation is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a combustion device such as an oil hot air heater.

  Conventionally, in this type of combustion equipment, combustion is continued until the occurrence of the abnormality detection output from the combustion sensor exceeds the specified number of times, and when the abnormality detection output reaches the specified number of times, the combustion is stopped and the abnormality detection is performed. Some stop the combustion only when the output reaches the specified number of times within a predetermined time. (For example, Patent Document 1)

  In addition, when the incomplete combustion detection by the incomplete combustion detection means continues for a timer time, the operation control means stops the combustion operation so that it cannot be restarted, and the combustion operation is prohibited. When the detection of complete combustion ends within a time shorter than the timer time and is repeated, when the number of repetitions reaches a predetermined number, the operation control means stops the combustion operation. (For example, Patent Document 2)

JP-A-5-149536 JP-A-7-103470

  By the way, in this conventional system, when the timer is measuring the predetermined time for detecting the abnormality detection output, the power plug is temporarily unplugged to move the device, and then restarted after moving or after power failure. During operation, the timing of the timer is canceled and the timing is restarted from the beginning, or the number of repeated incomplete combustion detections is canceled and the number of incomplete combustion detections is restarted from the beginning, and the power plug is removed. If the operation is continued, the detection of incomplete combustion by the incomplete combustion detection means continues for the timer time, or the abnormality detection output reaches the specified number of times within the predetermined time and the combustion operation is stopped, There has been a problem that the combustion equipment that is stopped so that the combustion operation cannot be restarted and the combustion operation is prohibited is operated as it is.

  In order to solve the above problems, the present invention provides a burner, a combustion sensor that detects abnormal combustion of the burner, a storage unit that stores the number of abnormal combustions detected by the combustion sensor, and a timer unit. When the abnormal combustion is detected by the combustion sensor, the timer unit starts timing, and the combustion operation is stopped when the number of abnormal combustion detections exceeds the predetermined number of times until the timer unit reaches the predetermined time. In the combustion equipment provided with a control device that prohibits re-operation and the control device, the power source is once de-energized after the timer starts timing, and then re-energized and re-operated, The number of times of detection of abnormal combustion stored in the storage unit is set to the number of times stored before the non-energized state and time measurement by the timer unit is performed from the beginning.

  Further, in claim 2, in the combustion device according to claim 1, the control device displays continuous abnormal combustion when the number of times of abnormal combustion detected exceeds a first predetermined number after the start of timing by the timer unit, When the number of abnormal combustion detections exceeds a second predetermined number that is greater than the first predetermined number, the combustion operation is stopped and the re-operation is prohibited.

  According to the first aspect of the present invention, when the power supply is once de-energized after the timer unit starts timing, and then re-energized and restarted, the number of abnormal combustion detections stored in the storage unit is de-energized. Set the number of times that was memorized before the status, and the timer unit will start counting from the beginning, so even if you restart the operation, the power plug will not be pulled out, and the power will not be affected by the power failure due to a power failure. It is possible to detect and judge abnormalities and to prohibit continuous incomplete combustion display and re-operation, and to use the equipment more safely.

  According to the combustion apparatus of the second aspect of the present invention, when the number of abnormal combustion detections exceeds the first predetermined number after the start of timing by the timer unit, continuous abnormal combustion is displayed, and the number of abnormal combustion detections is the first. If the second predetermined number of times exceeding the predetermined number of times is exceeded, the combustion operation is stopped and the re-operation is prohibited, so it is possible to promptly notify the user of the abnormality and prompt the inspection and repair of the equipment. By prohibiting the operation, it is possible to prevent an accident from occurring by preventing it from being used in an abnormal state.

Sectional drawing which shows the combustion equipment which attached | subjected one Example of this invention. FIG. The flowchart figure of the operation | movement which detects the abnormal combustion.

  Next, an embodiment of the present invention will be described with reference to the drawings.

  Reference numeral 1 denotes a fan heater main body installed indoors, a burner 2 that burns inside the fan heater main body 1, a control device 3 mainly composed of a microcomputer that controls the operation of the fan heater, and the rear surface of the fan heater main body 1 A convection blower 4 in the opening, a hot air outlet 5 on the front surface of the fan heater main body 1, and an operation portion 6 on the upper front side of the fan heater main body 1 are used for convection of the combustion exhaust gas in the burner 2. Heating is performed by blowing air from the hot air outlet 5 into the room by the blower 4.

  The burner 2 includes a vaporizer 9 having a vaporization heater 8 at the lower part of a burner head 7 having a plurality of flame holes. The burner 2 has a volume from an oil pan 10 in the vaporizer 9 heated by the vaporization heater 8. A liquid fuel is supplied through an oil feed nozzle 12 by driving an electromagnetic pump 11 of the type, and a mixed gas of vaporized gas obtained by vaporizing the liquid fuel and combustion air supplied from a combustion blower 13 through a blower passage 14 is supplied to the burner. Combustion is performed in the flame holes of the head 7, and during combustion, heat is recovered from the flame by an annular heat recovery ring 15 provided at the upper end of the vaporizer 9 so as to face the plurality of flame holes, thereby reducing energization of the vaporization heater 8. It has a wide turndown ratio and performs quiet vaporization combustion.

  The operation unit 6 includes an operation switch 16 for instructing start / stop of operation, a room temperature setting unit 19 configured by a room temperature increase switch 17 and a room temperature decrease switch 18 to set a desired room temperature, a timer switch, Various operation switches such as a preheating standby switch and a display unit 20 for displaying time and set room temperature are provided.

  Reference numeral 21 denotes a vaporization temperature sensor for detecting the temperature of the vaporizer 9 heated by the vaporization heater 8, and the control device 3 turns off the vaporization heater 8 when the temperature detected by the vaporization temperature sensor 21 reaches a predetermined upper limit temperature. When the predetermined lower limit temperature is reached, the vaporizing heater 8 is turned on to keep the temperature of the vaporizer 9 within a temperature range in which the liquid fuel can be vaporized satisfactorily.

  The control device 3 monitors the temperature detected by the vaporization temperature sensor 21 according to the operation command of the operation switch 16 and heats the vaporizer 9 to a temperature at which the liquid fuel can be vaporized by the vaporization heater 8. 9 is raised to a temperature suitable for combustion, the electromagnetic pump 11 and the combustion blower 13 are started to drive, the mixed gas is ignited by the ignition device 22 to start combustion, and the flame is detected by the combustion sensor 23 by the flame rod. According to the deviation between the detected room temperature of the room temperature sensor 24 provided in the vicinity of the convection fan 4 on the back of the instrument body 1 and the set room temperature set by the room temperature setting means 19, the electromagnetic pump 11 and the combustion pump The blower 13 is controlled to vary the combustion heating power so that the room temperature set by the room temperature setting means 19 is reached.

  In this variable control of the combustion thermal power, the drive frequency of the combustion blower 13 and the drive frequency of the electromagnetic pump 11 are set in advance as a set by subdividing into a plurality of stages, and the deviation between the detected room temperature and the set room temperature and the room temperature. This is done by selecting subdivided firepower according to the change gradient.

  The control device 3 includes a timer unit 25 and a storage unit 26. When the timer unit 25 receives an operation stop command from the operation switch 16, the convection blower 4, the vaporization heater 8, the electromagnetic pump 11, and the like. Combustion blower 13 and fire extinguishing control are appropriately performed according to the count of timer unit 24 to realize a comfortable fire extinguishing without odor and smoke, and when incomplete combustion is detected by combustion sensor 23, timing is started. The timing is stopped after the time has elapsed.

  The storage unit 26 stores the number of incomplete combustion detected by the combustion sensor 23 while the combustion sensor 23 detects incomplete combustion and the timer unit 24 measures a predetermined time.

Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.
First, when incomplete combustion is detected by the combustion sensor 23 in the operating fan heater body 1 (S1), the control device 3 starts the timer unit 25 to start measuring time (S2), and the storage unit 26 is inoperable. The number of complete combustion is stored as one. (S3)
In this case, the predetermined time counted by the timer unit 25 is 60 minutes.

  Next, it is detected whether the power supply has been turned off due to a power failure or a power failure (S4). If no power is turned off, it is next checked whether the timer unit 25 has counted a predetermined time (S5). When the predetermined time is counted, the timing by the timer unit 25 is terminated (S6), the number of incomplete combustions stored in the storage unit 26 is reset to zero (S7), and the process returns to (S1). .

  Further, when the timer unit 25 has not timed the predetermined time in (S5), it is confirmed whether incomplete combustion has been detected again (S8). If not detected again, the process returns to (S4), and if detected again, the storage unit 26 is detected. The number of incomplete combustion stored in is added once and stored. (S9)

Then, it is determined whether or not the number of incomplete combustions n added once in (S9) is equal to or greater than the number n2 of prohibition of re-operation (S10), and when it exceeds n2, the combustion operation is stopped (S11) and re-operation is accepted. No re-operation prohibited state is set (S12), and re-operation inhibition is displayed on the display unit 20. (S13)
In this case, the re-operation prohibition count n2 is set to 7 times.

If the number n of incomplete combustion is less than the number n2 of prohibition of re-operation in (S10), it is determined whether the number n of incomplete combustion is equal to or greater than the number n1 of continuous incomplete combustion display (S14). Then, after the continuous incomplete combustion is displayed on the display unit 20 (S15), the process returns to (S4), and when the number of incomplete combustion n is less than the number of continuous incomplete combustion display n1 in (S14) ( Return to S4).
In this case, the continuous incomplete combustion display count n1 is set to 4 times.

  When the power is turned off at (S4), it is detected again whether the power is turned on again (S16). When the power is turned on again, the next restart is detected. (S17) When the re-operation is started, the number of times of incomplete combustion stored in the storage unit 26 before entering the non-energized state is set (S18), and the timer unit 25 is started from the beginning. The timing is started (S19) and the process returns to (S4).

  Thus, in this case, when the number of incomplete combustions reaches the number of continuous incomplete combustions within a predetermined time, the continuous incomplete combustion is displayed to inform the user of the abnormality, and the number of incomplete combustions is further reduced. If the number of re-operations prohibited is greater than the number of continuous incomplete combustion indications, the operation is stopped and re-operation is prohibited, so that it cannot be used unless repairs and inspections are completed. Inspection and repair of equipment can be encouraged, and re-operation is prohibited, so that it can be used in an abnormal state and accidents can be prevented.

  In addition, after incomplete combustion is detected during operation and the timer unit 25 starts timing, when the power plug is once unplugged and restarted after moving, or when restarting after a power failure, the storage unit 26 The stored number of incomplete combustion is set to the number before the non-energized state, and the timer unit 25 starts counting from the beginning in that state. Without being affected by the deenergized state of the power supply, it is possible to detect and judge equipment abnormalities and disable continuous incomplete combustion display and re-operation so that the equipment can be used more safely. It can be done.

2 Burner 3 Control device 23 Combustion sensor 25 Timer unit 26 Storage unit

Claims (2)

  A burner, a combustion sensor that detects abnormal combustion of the burner, a storage unit that stores the number of abnormal combustion detected by the combustion sensor, and a timer unit, and when the combustion sensor detects abnormal combustion, To a combustion device equipped with a control device that starts timing by the timer unit and stops the combustion operation and prohibits re-operation when the number of abnormal combustion detections exceeds the predetermined number of times until the time counting by the timer unit reaches a predetermined time In this case, when the power supply is once de-energized after the timer unit starts timing, and then re-energized and restarted, the control device stores the number of abnormal combustion detections stored in the storage unit before the de-energized state. The combustion apparatus is characterized in that the timer counts the time from the beginning by setting the number of times stored.   The control device displays continuous abnormal combustion when the number of abnormal combustion detections exceeds a first predetermined number of times after the timer unit starts timing, and a second predetermined number of times that the number of abnormal combustion detections is greater than the first predetermined number of times. The combustion apparatus according to claim 1, wherein the combustion operation is stopped and the re-operation is prohibited when the value exceeds.

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