JPH02118319A - Air-conditioning gas custam heater control system having self-diagnostic function - Google Patents

Abstract

PURPOSE: To enable a control system custom gas heater for cooling and heating to satisfy various desires of consumers and to quickly clear up the causes of faults, by giving a self-diagnostic function which can raise the fire power of a custom heater to a set value by performing A/D conversion on the feedback current of a linear gas valve at a high speed to the control system. CONSTITUTION: A control system is constituted of a routine of a sequence which turns on the operation of a custom heater in a prescribed operation sequence, a pre-purge sequence, a pre-ignition sequence, an ignition detecting sequence, a weak ignition sequence, a heating (weak) operation sequence, and a heating (strong) operation sequence, a routine for accomplishing the system operation of a self-diagnostic function, etc. As the operation sequence advances, normal operation displays, abnormal state displays, reset displays, and buzzer drive and digit displays are made. When an external interruption is permitted, a clock interruption and the external interruption are made to be accomplished simultaneously. The external interruption is made to be accomplished in an external interruption routine which is made in the stage, etc., in which the timer interruption is made to be permitted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heating and cooling gas custom heater control system having a self-diagnosis function, and in particular to a heating and cooling gas custom heater that automatically performs sequence control of the self-diagnosis function. The present invention relates to a control circuit and a control method thereof.

[Conventional technology and its problems]

Conventional cooling/heating gas custom heater control included a self-diagnosis function, and of course, such a self-diagnosis function
This was done using sequence control.

However, sequence control in conventional devices is performed block by block according to a self-diagnosis function. That is, as shown in FIG. 1, the burner motor safety device 2 is connected to the power source l so as to be controlled by the relay RYI, and a power source V9 is supplied thereto.

Further, the power supply unit 1 is connected to an operation stop operation unit 3, and the operation stop operation unit 3 is connected so that the operation is stopped by a remote control switching circuit 4.

The burner motor safety device 2 is supplied with a power supply v9 of a power supply section 1, and an overheat prevention thermistor circuit 5 having a resistor R1 and a thermistor Th is connected to the negative side thereof.

The overheat prevention thermistor circuit 5 is connected to a misfire detection circuit 6 supplied with a power supply vCC.

The misfire detection circuit 6 is connected to control the operation stop operation section 3 when a misfire state is detected.

Further, the misfire detection circuit 6 is connected to be controlled by a prepurge circuit 7 to which power supplies VCC2 and V12 are supplied.

The pre-purge circuit 7 is connected to a relay RY2 for manual control of its operation, and one side of the relay RY2 is connected to a power supply VC.
A pre-ignition solenoid valve drive circuit 8 is connected to which C2 and V12 are supplied. Further, the prepurge circuit 7 is connected to an abnormality detection circuit 9 to which a power supply vcC2 is supplied, and is connected to an ignition detection circuit 10 to be described later. The ignition detection circuit 10 is configured to interact with the igniter detection and flame rod block 11, which is composed of an abnormality detection circuit 9, a coil L1, an igniter 1g, a flame rod R, etc., and generates a signal associated with the presence or absence of ignition detection. is supplied to the remote control switching circuit 4 via line H. Further, the ignition detection signal is supplied to a weak combustion ignition section 12 to which a power supply VCC2 is applied, and the weak combustion ignition section 12 is connected to a room temperature thermistor part 13, receives a signal from it, and performs a linear Make the gas valve LGV i-controlled.

The room temperature thermistor part 13 has a resistor R2 and a room temperature thermistor Th2 connected to one side thereof, and is also connected to the remote control switching circuit 4 by a line C-G, so that relays RY4, RY6, RY7 are connected according to the control thereof. and RY8, R
Y12, RY13, etc. are driven to control the igniter and solenoid valve, respectively, relay RY4 controls cooling or ventilation operation, relay RY6 selects cooling or heating, and relay RY7 selects high power during heating. The relay RY8 turns off the cold air prevention function during air blowing or cooling, the relay RY12 turns off the air blowing or weak air blowing, and the relay RY13 controls strong cooling during cooling.

Therefore, in a conventional custom heater, a burner motor safety device 2 should be installed to induce overheating prevention using an overheating prevention thermistor circuit 5 and to ensure the safety of the burner motor, and a prepurge circuit 7 for prepurge operation should be installed.
In addition, a series of circuit sections had to be installed as a block unit according to the self-diagnosis function, such as an abnormality detection circuit 9 for detecting abnormalities.

Accordingly, if a self-diagnosis function is added, a circuit must be installed for each block of the added function, and furthermore, the circuit must be harmonized with the basic operation of the custom heater. Due to the increased complexity, it has been almost impossible to meet the diverse demands of consumers.

In addition, in conventional devices, when controlling the room temperature, the room temperature is controlled using a two-stage power supply (POWER), that is, the power is turned on and off when the temperature is above and below the set temperature. It was not possible to accurately control the room temperature at the set temperature.

As described above, in the conventional apparatus, when a reset situation occurs due to various causes during sequence operation, it is not possible to half-way determine the cause of a failure caused by the reset situation.

[Purpose of the invention]

Therefore, the present invention provides a control circuit for a heating/cooling gas custom heater that has a self-diagnosis function that quickly converts the return current of a linear gas valve from analog to digital to reach a set fire power in order to perform multiple firing power control. is its purpose.

Another object of the present invention is to provide a control circuit for a heating/cooling gas custom heater having a self-diagnosis function that realizes automatic operation sequence control and satisfies various desires of consumers.

Still another object of the present invention is a self-diagnosis function that immediately displays the reset situation on a display device when a reset situation occurs during sequence operation, so that the cause of the failure can be quickly grasped. An object of the present invention is to provide a control circuit for a gas custom heater for air conditioning and heating.

A further object of the present invention is to provide a method for controlling a gas custom heater for heating and cooling that has a self-diagnosis function that shows multi-stage thermal power control, sequence control, and a self-diagnosis function.

Still another object of the present invention is that even if the ignition is repeated a certain number of times, the ignition can be ignited, but if the ignition continues to misfire, the system detects when the gas in the cylinder is exhausted and stops the operation of the cooling/heating gas custom heater, thereby preventing safety accidents. An object of the present invention is to provide a gas burnout sensing method that excludes gas generation.

[Means to solve the problem]

The present invention includes a microprocessor that performs multistage thermal power control and operation sequence control, and a DCC constant voltage circuit; 120 to perform a rapto every 8°33mS
a Hertz rectangular wave circuit; a reset circuit for initializing the microprocessor; a key scanning circuit for selecting manual key input; a 4-digit drive circuit for controlling the display of manual input; and a 4-digit drive circuit for displaying the time. 7-segment drive circuit section; LED display circuit section that indicates the operating status; Puza drive section that emits a warning sound for abnormal conditions; Gas type selection circuit that selects the type of gas to be used; Fan that senses the rotation of the fan motor. a motor speed sensing section; an ignition sensing circuit that senses the operation of the igniter; a seven-remrod ignition sensing circuit that senses the ignition state of the flame rod; a room temperature sensing circuit that senses the room temperature using a room temperature thermistor; a hot air temperature sensing circuit that detects hot air temperature using a hot air thermistor; a linear gas pulp control circuit that controls a linear gas valve;
A fan motor drive circuit that drives a fan motor; includes a burner motor, a seven-arm motor, an igniter, and first and second solenoid valves, and a relay drive circuit that operates these actuators by the microprocessor, and interlocks with this. It is composed of an AC power supply circuit section and the like that applies AC power to the actuator.

[Effect]

The control circuit of the present invention configured in this manner has a self-diagnosis function associated with sequence operation, and is reset when an abnormal condition is detected and at the same time alerts the outside. A predetermined sequence is programmed for operation sequence control.

For example, sequence 1 is operation on, sequence 2 is wind pressure switch on, sequence 3 is prebarge 30
Sequence 4 is ignition 1 second drive, sequence 5 is ignition detection 1 second, sequence 6 is low heat 30 seconds, sequence 7 is weak operation, and sequence 8 is strong operation. .

Therefore, the operation of the present invention consists of the following steps. First, in the initial state, a reset mode is set, and a clock interrupt and an external interrupt are allowed, and then a reset routine is executed.

The reset routine is a preliminary step for performing operation sequence control with the self-diagnosis function of the present invention.

That is, the external interrupt is 8.3 at the initialization stage.
A clock interrupt is performed every 0.68 m5 for 3 milliseconds, and the proportional differential integral control (PID) calculation is performed using the speed signal of the fan motor rotation speed, and the speed current of the linear gas valve (LGV) is changed. Perform analog/digital (A/D) conversion. On the other hand, in the clock interrupt, PID calculation and LGV continue before 3.4 ms.
The feedback current is A/D converted, the counter is cleared after 3.4 milliseconds, and key scanning and key response functions are performed. Here, the clock interrupt senses the frame rod frequency, counts the 7 ammonitor rotational speed input with a period of 0.68 milliseconds, generates the display device drive output, and 3.4
Performs millisecond counting function. The external interrupt performs the functions of zero crossing, timer interrupt enable, and clock increment for controlling the phase of the fan motor every 8.33 milliseconds by a square wave with a period of 120To. After the timer interrupt is permitted by an external interrupt, it is performed in a routine that controls the phase of the fan motor drive mode at a cycle of 64 microseconds.

Next, matrix rotation will be performed, but the segment buffer will be moved sequentially for each reset routine l loop.
A light emitting diode (LED) buffer moves, performs A/D conversion of the voltage of the room temperature thermistor, and displays the temperature.
Further, the voltage of the hot air thermistor is A/D converted, and the voltage associated with the type of gas is A/D converted. This reduces the time to perform the reset routine and thus induces faster system control.

Next, the warning buzzer is turned on for 50 milliseconds to check the warning buzzer to prevent damage to the applied equipment system, then turned on for another 50 milliseconds, and turned off for 50,039 seconds for a predetermined number of times. That is, the drive is made 20 times. After that, the current operating mode is determined, and if the cooling mode is operating, the compressor is operated for a predetermined period of time, for example, 3 minutes, and the count is activated to delay the operation of the compressor. If it is running, it is determined whether it is running on a timer.

If it is a tie-boo operation, compare it with the operation setting time,
It is determined whether the time matches the set time, and if the time matches, the cooling operation is controlled to turn off the air conditioner, and if the time does not match, the routine moves to the routine when the timer operation is not performed. Therefore, in this case, after a predetermined period of time, for example, 3 minutes, the compressor is turned on and the room temperature is controlled, but at this time, control is performed using PID calculation.

On the other hand, in the operation stage, if the vehicle is not in operation, the off function can be controlled, and the control is based on PID calculation.

Furthermore, when operating in heating mode, a self-diagnosis function routine is first performed. That is, the oven status and overheating status of the hot air thermistor are checked. If the hot air thermistor is in an overheating status, and the ventilation key is turned on, the ventilation lamp is lit, the fan motor is turned on, and the burner motor is turned on. While the blower block is in operation, which is turned off and not yet in operation, the warm air thermistor signal is returned to the A/D to determine whether there is an abnormality. Next, in order to check whether the frame rod is disconnected or not, the hardware issues an abnormal signal (from the frame rod ignition detection circuit).
(12011 If not, it will be determined whether the 7-remrod ignition detection circuit is abnormal, and if the circuit is abnormal, it will be reset at the same time as the reset status is displayed, the reset lamp will be lit, and the operation mode will be stopped. At the same time, the combustion blower motor and the wind pressure switch are driven while power is applied for a predetermined time, and while the boss purge is maintained, a buzzer is driven to issue an abnormality detection warning.

On the other hand, if there is a misfire during the mid-misfire stage, after executing the sequence of turning on the wind pressure switch and turning off the linear gas valve and the first and second electronic solenoid valves, the controller enters the proportional-integral-derivative calculation control mode. .

In particular, when the heater uses a cylinder, the gas stored in the cylinder is burned out, and although it is ignited at the time of ignition, if it misfires midway through, it will continue to ignite repeatedly, so the gas stored in the cylinder is A small amount of gas continued to leak, posing a risk of a safety incident resulting in an explosion and fire. In order to prevent this, it is determined whether the ignition is ignited at a certain time interval, and if the ignition is ignited, the time for which the ignition state is maintained is counted, and the ignition state is maintained for a certain period of time. If the ignition state is maintained for 5 minutes, the cooling/heating gas custom heater will continue to operate.

In addition, if the ignition state is not maintained for 5 minutes and a misfire occurs midway, the number of midfire misfires is counted and the number of times is calculated.For example, even if the ignition is ignited three times, ignition will occur, but the misfire will continue to occur midway. When the system detects that the gas is running out, the system will stop the operation of the heating and cooling gas custom heater.

This is an intermediate misfire detection block.

In this manner, after the misfire inspection is completed, the process moves to the linear gas valve control stage, and the linear gas valve is controlled upward or downward. Next, the process moves to the operation sequence control stage and room temperature control is performed. For this purpose, it is first determined whether air is being blown, and when air is being blown, that is, when it is in operation, the above-mentioned air blowing block, ie, the function of turning on the fan motor and turning off the burner motor, is performed. If it is determined that air is not being blown, the system moves to the system operation judgment stage, and if the system is running, it moves to the timer operation stage. If the system is running, the system is turned off if the set time matches. If the temperature of the hot air thermistor is 50℃ or higher, the fan motor is turned on, and if the temperature is 50℃ or lower, the prescribed sequence 2 or higher is activated. If not, turn on the burner motor, turn on the linear gas valve to operate at low temperature, and follow the prescribed sequence 1.
The wind pressure switch is set to 1 due to the clock interrupt.
Determine whether it is in the off state for 0 seconds or more.

On the other hand, in the operation judgment stage, if the operation is not in operation, it is determined whether the temperature of the hot air thermistor is below 40°C, and if it is below, the burner motor and fan motor are turned off, and the solenoid valve and linear gas valve are turned off. , the igniter is turned off and PID control is performed.

At the stage of determining whether the wind pressure switch is off for more than 10 seconds again, if the wind pressure switch is off for more than 10 seconds, it will be reset; otherwise, the on pit of the wind pressure switch will be set to 1, and if the wind pressure switch is turned on, , a predetermined sequence 2 is performed, and if the wind pressure switch is not turned on, it is determined whether sequence 2 or higher is being performed, and if it is higher than that, it is reset, and if not, PID control is performed.

Next, in the external interrupt, if 1 second has not elapsed to determine 1 second after power-on, PID control will be activated, and if 1 second has elapsed in the external interrupt, calculate the temperature difference between the set temperatures. do.

Furthermore, it is determined whether the fan is operating, and if the fan is operating, it is determined whether the rotation speed of the fan motor is operated at a low speed for a predetermined period of time, for example, 10 seconds or more, and if the fan is operating at a low speed, it becomes a reset state, Otherwise, it is determined whether the predetermined sequence performs three or more functions.

If it is determined that the function in sequence 3 or above cannot be performed, clear the prebarge time, activate sequence 3, turn on the igniter,
As in the case where pre-barge counting is within 30 seconds, PID control is applied.

This is called a pre-barge block.

If the function of sequence 3 or higher is performed, it is determined whether the function of sequence 5 or higher is performed, and sequence 5 is determined.
If the above operations are performed, the misfire block during operation will be executed, which will be described in detail later, and if sequence 5 and above are not executed, the igniter will be activated after 1 second when the ignition is detected (if 60H is not detected). , reset and predetermined signal 60
If the square wave of Hx is detected, it is determined whether to perform a predetermined sequence 4, and if not, the operation of sequence 4 is performed and the solenoid valve is turned on. On the other hand, if it is determined that sequence 4 or higher has been performed, it is possible to determine whether or not ignition occurs, and if ignition is not ignited, the non-ignition time is counted and if it is 3 seconds or more, the state is reset. , if it is less than 3 seconds, PID
Becomes control. This accomplishes a misfire block.

If the ignition state is detected, it is determined whether to perform a predetermined sequence 5 or higher, and if it is not activated, sequence 5 is activated, the igniter is turned off, PID control is performed, and sequence 5 or higher is activated. For example, it is determined whether there is a misfire condition.

If there is a misfire, a misfire block or flame rod inspection block will be executed as in the case above. On the other hand, if there is no misfire, it is determined whether the operating state is a predetermined sequence 7 or higher.

If it is not the operation of sequence 7 or above, a low flame counting operation is performed, and if the low flame counting is 30 seconds or more, the operation of sequence 7 is performed and it is determined whether the current ability is strong. As a result, the room temperature rise is 1
If it is done more than 1 degree, 2 degrees, and 3 degrees, then the linear gas valve is weakened for more than 1 degree, and the linear gas valve is made stronger for more than 2 degrees and 3 degrees, and the predetermined sequence 7 and sequence 8 are performed. If there is no difference between the room temperature and the set temperature, turn off the linear gas valve.

Incidentally, the present invention has the advantage that automatic sequence control is possible, whereby the temperature difference between the set temperature and the room temperature can be reduced to the minimum width.

〔Example〕

Next, the present invention will be described in detail based on the accompanying drawings.

FIG. 2 is a detailed diagram illustrating the control circuit of the present invention, and the microprocessor 100 includes a number of interface circuits.

The key scanning circuit section 101 is composed of a large number of switch groups, and as shown in the drawing, the switch group 102 has one side of switches 106 to 110 individually connected to terminals R4 to R8, etc. of the microprocessor 100.
The other side of the microprocessor 6 to 110 is connected to the terminal 9 of the microprocessor 100 through individual diodes ill to 115 and the like.

Similarly, the switch group 103 is a microprocessor-100.
One side of the switch group 116-120 etc. is connected to the terminals R4-R8 of the microprocessor-100, and the other side of the switch group 116-120 etc. is connected to the terminal R10 of the microprocessor-100 via the diodes 121-125 etc., respectively.

In the switch group 104, one side of the switches 126 to 130 etc. is connected to the terminals R4 to R8 of the microprocessor-100, and the other side of the switches 126 to 130 etc. are connected to the microprocessor-100 through individual terminals such as diodes 131 to 135. are respectively connected to the terminal R11 of the terminal R11.

The switch group 105 is composed of switches 136 to 139, etc., and the switch 136 is of a one-pole, two-throw type, and its fixed terminals are selectively connected to terminals R7 and R8 of the microprocessor-100. 137,138
, 139, etc., one side of them is microprocessor-1.
The other side of each switch 137-139 is individually connected to terminals R6-R4 of microprocessor 100 through diodes 140-143.
Connected to 12.

Here, the switches etc. are set as follows.

That is, switch 106 is a wind pressure switch, switch 1
07 is a test mode switch, switch 108 is an inspection mode switch, switch 109 is a switch, switch 1
10 is an automatic mode switch, switch 116 is a sensory control key, which is a key for cold weather, switch 117 is a height key, switch 118 is a lowness key, switch 119 is a time key, switch 120 is a minute key, and switch 126 is a spin key switch. 127 is a function key switch 128
Switch 129 is a sensory control key, which is a comfort key. Switch 130 is a sensory control key, which is a key for hot weather. Switch 136 is a time/timer/clock mode selection key. Switch 137 is an air conditioning selection key. Switch 138 is a driving key and The switch 139 is a timer operation key or the like.

Furthermore, switches etc. are arranged as shown in FIG. 3 together with light emitting diodes etc. which will be described hereinafter.

The 4-digit drive circuit section 150 is constituted by a control circuit section of a display device, which will be described later.

The 4-digit drive circuit section 150 is made up of four PNP transistors 151, 152, 153, 154, etc. These transistors 151 to 154 etc. have their emitters etc. connected to the power supply VO, and their bases etc. are connected to bias resistors 155, -156, 157.
, 1584:: At the same time as it is connected to the power supply VO, it is individually connected to the terminals RO to R3 of the microprocessor 110 via resistors 159, 160, 161, 162, etc. Further, these collectors are selectively connected to an operation display section that displays the operating status of a clock display section and a reset display section, which will be described in detail hereinafter. Therefore, the 4-digit drive circuit section 150 controls the operations of the clock display section and the driving display section under the control of the microprocessor 100.

The clock display section 170 is a 7-segment drive section 17 connected to terminals E8 to E14 of the microprocessor-100.
1 and a clock display device 172.

The clock display device 172 has resistors 173, 174°, 175.
176, 177, 178, 179 to the 7-segment drive section 171, and its ground line is connected to the collectors of the transistors 151-154, etc. of the 4-digit drive circuit section 150. Therefore, the clock display is displayed by the clock display device 172 which is driven under the control of the microprocessor-100. Here, the 7-segment driving unit 171 is a commonly used integrated circuit.

The operation display section 180 has a 7-segment drive section 181 connected to terminals EO to E6 of the microprocessor-100.
, a temperature display device 183, two light emitting diodes 183 and 184 for displaying the operating status, and the like. 10
The stage digit display device 183 has resistors 185 to 191.
etc., to the 7-segment drive section 181, and the transistors 151,1 of the digit drive circuit section 150.
Connected to 52 collectors.

The first and second light emitting diode groups 183 and 184, etc. are light emitting diodes 192 to 19B and light emitting diode 199.
~205, etc., among which light emitting diode 1
92-198, etc., their cathodes have a resistance of 185-19
1, etc., and the anode is connected to the collector of the transistor 154) of the 4-digit drive circuit section 150. In addition, light emitting diodes 199-20
5, etc., their cathodes are individually connected to the resistors 185 to 191, etc., and their anodes are connected to the collectors of the transistors 153 of the 4-digit drive circuit section 150, respectively.

Here, the light emitting diodes 185 to 198 etc. are used for cloudy, comfortable, cold, swing, timer operation, heating,
It shows room temperature, g temperature, air blowing, weak operation, strong operation, reset, and cooling state, and the clock display device 172, temperature display device 182, etc. display the current time, temperature, etc., respectively.

These light emitting diodes may be arranged with switches and the like as shown in FIG.

The buzzer drive circuit 210 is a microprocessor-100.
The buzzer 212 includes a diode 211 and a capacitor 213 connected to the terminal E7 of the buzzer 212.

The fan motor drive circuit 220 is a microprocessor.
It is connected to the terminal E15 of 100 and is composed of a resistor 221 and an optotriac light emitting element 222. The light emitting element 222 emits light in response to an output signal from the microprocessor 100, and controls the driving of the seven-arm motor as described hereinafter. Linear gas valve control circuit 2
30 is the output terminal E16 to E2 of the microprocessor.
3, and two transistors 234 that drive the linear gas valve proportionally according to the magnitude of the current from the integrated circuit 233. 23
It is composed of 5th grade.

PNP transistor 234 has its base R/2R
It is connected to a ladder circuit 232, its emitter is connected to the power supply terminal by a resistor 236, and its collector is connected to the N
PN Connected to the base of transistor 235 for drive control. The emitter of the transistor 235 is a linear gas valve 237 connected to a power supply terminal V24, which will be described hereinafter.
and its collector is connected to transistor 2.
At the same time, it is connected to the A/D conversion input terminal AN of the microprocessor sensor 100. Therefore, the linear gas valve 237 is driven by the transistor 235 under the control of the microprocessor 100, and a proportional analog current signal accompanying the driving is fed back to the microprocessor 1°O.

The hot air temperature sensing circuit 240 is a microprocessor-100.
It is connected to the A/D conversion input terminal ANI of , and is composed of a hot air thermistor 241 and a resistor 242.

The room temperature sensing circuit 250 is connected to the A/D conversion input terminal AN4 of the microprocessor 100, and includes a room temperature thermistor 251 and a resistor 252.

The 7-frame rod ignition detection circuit 260 has a transformer 261, the primary side of which is connected to the power supply terminal H, and the secondary side connected to the frame rod 262 and the 15V power supply terminal V5. There is.

The frame rod 262 is connected to a diode 268 by a capacitor 263 and a resistor 264 connected in parallel, and the diode 268 is connected to the base of a transistor 269.

The collector of the transistor 269 is connected to a power supply vO through an optocoupler light emitting element 270 and a resistor 271, and the emitter is connected to a secondary power supply v5 of the transformer 261. Further, a Zena diode 267 consisting of an optocoupler light emitting element 266 and an electrostatic voltage diode is connected in series between the cand of the diode 268 and the collector of the transistor 269, and a capacitor 265 is connected in parallel. Further, the emitter of the transistor 269 is connected to the emitter of an optocoupler light receiving element 272, and the collector of the optocoupler light receiving element 272 is connected to the power source vO via the base of a transistor 273 and a resistor 274.

The emitter of the transistor 273 is connected to the light receiving element 272.
and the emitters of transistors 269, respectively, and their collectors are connected to terminal E32 of microprocessor-100.

Therefore, when power is applied to the transformer 261 and the frame rod 262 senses ignition, the resistance value of the frame rod 262 becomes low, and the voltage at a predetermined frequency (about 60 cm) generated by the transformer 261 is When the voltage exceeds the voltage value of 267, it is subjected to bumper rectification via a resistor 264 and a diode 268, and is applied to a transistor 269, causing the transistor to oscillate.

Accordingly, the light emitting element 270 connected to the collector of the transistor 269 is blinked at a predetermined frequency, turning the light receiving element 272 on and off, and the transistor 273 is turned on and off. It will send out an ignition detection signal.

On the other hand, when the frame rod 262 fails to detect ignition or when the frame rod 262 is short-circuited, the light emitting element 266 blinks at a predetermined frequency (12011z), turns the light receiving element 272 on/off, and at the same time turns on the transistor 27.
3 is turned on and off, a rectangular wave of a predetermined frequency signal (120 Hz) is applied to the microprocessor 100, and misfire is detected.

The igniter sensing circuit 280 includes an igniter sensing body 2811, a current transformer 282, a bridge rectifier 283, and the like.

The igniter sensor 281 is connected to the primary side of the current transformer 282. A bridge rectifier 283 is connected to the secondary side of the current transformer 282. bridge rectifier 2
83 has a smoothing filling capacitor 284, a resistor 285,
A capacitor 286 is connected in parallel and connected to terminal E33 of the microprocessor-100 by a resistor 287;
At the same time, a diode 288 connected to the power source vO is connected to the terminal E33.

Such an igniter detection circuit 280 is connected to an igniter detection rod 281.
If it detects the igniter ignition state, it will generate a current, and the power rectified by the bridge rectifier 283 will pass through the resistor 287 to notify the microprocessor sensor 100 of the ignition state, and if it is not the ignition state, the diode 2
The power supply vO voltage via 85 is applied to the microprocessor.
100 is applied. Fan motor rotation speed sensing section 29
0 is composed of a Hole sensor H8 and a pulse generator 291.

The gas type selection circuit 300 includes a dip switch 301 and resistors 301, 302, 303, and 304 connected sequentially from the 5V power supply terminal v5 to the operation terminal of the dip switch.
, 305, 306, etc., and the resistor 306 is connected to the power supply vO.
is applied.

Therefore, when the gas selection is made by the dip switch 301, the power supply depending on the predetermined combined resistance value of the resistors 301 to 306 is applied to the A/D of the microprocessor 100.
Applied to conversion terminal AN3, microprocessor-1O
O will operate according to a predetermined program.

The relay driving circuit 310 is a microprocessor-1oo
terminals R15, E25. E26. Transistors 306, 307, 30 individually connected to E36°E34, etc. by resistors 301, 302, 303, 304°305, etc.
8,309.310 etc.

Further, the bases of the transistors 306 to 31'O, etc. are connected to the power supply vO via respective resistors 311, 312, 313, 314, 315, etc., and their emitters are connected to the power supply vO.
protection diodes 321, 322, 323, 324, and
Relays 316, 317, 318 connected in parallel with 25 etc.
, 319, 320, etc. are connected. Therefore, under the control of microprocessor-100, relays 316-32
θ etc. are selectively driven.

Herein, the relays 316-320, etc., respectively actuate the compressor magnet connection, actuate the solenoid valve, or actuate the burner motor and igniter, as will be described in detail in FIG. 4 below.

The power supply unit 330 includes power supply terminals A, B, and C, which will be described hereinafter in FIG. Acts on V12. A reverse current prevention diode 332 is connected in parallel to the bridge rectifier 331, and a 24-port power supply V2 is connected to the bridge rectifier 331 via a smoothing filling capacitor 333.
4, a precision regulator 336 which is made of an integrated circuit, capacitors 334 and 338 connected to the regulator 336, and a diode 33.
A precision regulator circuit consisting of 5,337, etc. is connected, and the circuit can have a power supply terminal v5 which obtains -5V, and the power supply terminal V5 is connected to the terminal VSSSAVSS of the microprocessor-100. Connect to %AVR-.

The 120 Hz square wave generator 340 includes a transistor 34
1, and the transistor 341 has a resistor 34 whose base is connected in series between the output terminals of the bridge rectifier 331.
A capacitor 344 is connected to the intermediate wrap of 2,343 and connected in parallel with a resistor 342, and a resistor 345 is connected to the collector thereof. Therefore, a square wave signal having a predetermined frequency is applied to the interrupt terminal IRA of the microprocessor-100.

The reset circuit 350 is composed of a reset integrated circuit 351, a resistor 352, and a capacitor 353, which can be purchased for regular use.

The reset circuit 350 is a microprocessor-100
is connected to the reset terminal R5T of.

The oscillator circuit 360 is made up of an oscillator 361 and capacitors 362, 363, etc. connected in parallel with the oscillator 361.
It is connected to terminals X and EX of the microprocessor-100 and generates a signal of a predetermined frequency, eg 3MH2.

On the other hand, the relays 316 to 330 shown in FIG. 2 each control a predetermined load according to the AC wiring as shown in FIG.

In FIG. 4, an AC power supply end 401 is connected to a temperature fuse 40
2 and a fuse 403 to the primary side of a transformer 404.

The transformer 404 has terminals A and B on its secondary side.

C, D, and E are formed, and their terminal power supplies are the same as the terminals A, B, C, D, and E in FIG.

A relay 316 is connected to the end of the temperature fuse 402,
A relay 318 is connected to the end of the fuse 403.

A magnetic connector 405 is connected between the fixed terminal sides of the relay 316 and the relay 318, and the magnetic connector 405 is connected to a compressor (not shown). One terminal of the relay 317 is connected to the relay 316, and the other operating terminal is connected to the AC relay 406.
The relay 406 has contacts 406-1 and 406 on both sides thereof.
-2, contact 406-1 is connected to one side of bridge rectifier 407 adapted to work with relay 319, and contact 406-2 is connected to the other side of bridge rectifier 407. The bridge rectifier 407 rectifies the power supply and connects the first and second solenoid valves 408 and 409 in parallel.
Apply rectified power to.

These solenoid valves 40B and 409 are connected in series with a resistor 410 and a capacitor 4.
11 is applied to stabilize their operation.

Further, a relay 320 is connected to the operating terminal side of the relay 317, and an igniter 412 whose one side is connected to the ground side of the bridge rectifier 407 is connected to the operating terminal side of the relay 320. Burner motor 413 , one side of which is connected to the ground side of rectifier 407 , is connected to the working terminal side of relay 317 . Fan motor 414 is coupled on one side to thermal fuse 402 and on the other side to its drive circuit. The drive circuit is the fan motor drive circuit 220 in FIG.
One side of the triac 415 is a resistor 41 in the light receiving element driven by the light emitting element 222 of the optotriac.
The other side of the triac 415 is connected to the gate of a triac 417 connected to the burner motor 413, and is also connected to a parallel circuit of a resistor 418 and a capacitor 419. The other side of the triac 417 is connected to the fuse 403, and the triac 417 is also connected in parallel with a resistor 420 and a capacitor 421 in series.

Therefore, when the light emitting element 222 of the opto-triac is driven, the fan motor 414 is activated by the triac 41.
5 is gated to drive the triac 417. The 7-arm motor 414 operates accordingly.

In order to drive the compressor (not shown), the relay 316 is
This is realized by controlling the relay 318 and driving the magnetic connector 405.

To drive igniter 412, relay 316.3
This is possible by driving 17,320. Burner motor 413 is driven by controlling relays 316 and 317.

The control circuit for the cooling/heating gas custom heater constructed in this way can be shown as an entire system as shown in FIG.

The entire cooling/heating gas custom heater system 500 is driven and controlled by the control circuits illustrated in FIGS. 2 and 4.

That is, the microprocessor 501 includes a room temperature thermistor 502, a warm air thermistor 503.
04, an ignition transformer 505, and the like. The microprocessor-50°1 controls the compressor and fan for cooling, circulates the refrigerant 507, and generates hot air or cold air from the heat exchanger 508,
The first system consists of a composite electronic valve for gas 509 human power.
Solenoid pulp 510, second solenoid pulp 511
At the same time, the ignition transformer 505 is controlled to cause discharge and induce combustion in the burner 513. The burner 513 is the combustion blower 5
Combustion air from No. 14 is introduced, and the combusted air passes through a heat exchanger 508 to generate warm air, which is then exhausted as combustion gas.

A convection blower 515 is installed in the heat exchanger 508,
Ventilate the room.

The convection blower 515 is controlled by a cold air prevention shutter 516 and connected to a wind pressure switch 517.

Power supply 518 has current fuse 519 and temperature fuse 520.
The operation selector switch 521 includes a wind pressure switch 517.

The overall system 500 of the present invention described above operates as follows.

Referring to FIG. 6, there is shown a flowchart illustrating the operation of the present invention.

The control method according to the present invention is characterized by having a self-diagnosis function accompanying sequence operation.

Therefore, to give an example of sequence operation, during heating control, heating (strong) operation, heating (weak) operation, ventilation operation, non-ignition detection, misfire detection, overheating operation, overheating prevention operation (thermistor open detection) ), operation when ignition is not detected, operation when a flame defect is detected, timer operation, operation when wind pressure switch is detected, cooling control normal operation, ventilation operation, anti-freezing operation, and sequence control with compressor 3-minute delay operation at momentary power outage. Ru.

To this end, the microprocessor-100 is programmed with a sequence of essentially eight steps. For example, sequence 1 is operation on, sequence 2 is wind pressure switch on, and sequence 3 is pre-purge 3.
0 second drive, sequence 4 is free ignition 1 second drive, sequence 5 is ignition detection 1 second, sequence 6 is low heat 30 seconds, sequence 7 is heating (weak) operation, sequence 8 is heating (strong) operation Here, sequence 7 and sequence 8 are sequences that are executed when all operations are performed normally.

First, the system 500 enters a reset state (step 60).
0). In the next initialization step, initialization (step 60
In step 1), the RAM of the microprocessor 100) is cleared to permit external interoperability and clock interoperability for initial data input.

Here, in the external interwoven stage (700),
First, it is determined whether clock inclusion is performed every 0.68 milliseconds (701). If the clock interrupt is performed, the rotational speed of the fan motor with a period of 0.68 milliseconds is counted 702), the frequency of the frame rod is counted 703), and then the output terminal of the display device is controlled. 704), and thereafter counts for 3.4 milliseconds (705). What is noteworthy here is that in the step (702) of counting the rotational speed of the 7 ammonitor, the Hall sensor 28
1, and the step (703) of counting the frequency of the preenframe rod is performed by the fan motor rotation speed sensing circuit 280 provided with 60H! Since a rectangular wave and an abnormal signal, for example a 120H1 rectangular wave signal, are applied to the microprocessor 100, the operating status of the system 500 is displayed on a display device or the like.

On the other hand, if it is not a clock interrupt, the process moves to the step of determining whether there is an external interrupt (800).

The external interrupt operation is performed at a cycle of 8.33 milliseconds, but if there is no external interrupt, the timer is reset, but if there is an external interrupt, the timer interrupt is disabled (802). When the unmotor is turned off (803), the phase delay data of the 7 unmotor is moved, the zero crossing state is entered for the phase control of the 7 unmotor (804), the timer interrupt is enabled (805), and the clock increase function is activated. 806)
, it is difficult to determine whether the clock interrupt has occurred once.8
07) If completed, the process moves to step (702) to perform the clock interrupt; otherwise, returns to the external interrupt.

Here, when the timer interrupt is permitted during execution of the external interrupt (805), the timer interrupt is 6
It is executed at a cycle of 8 microseconds, and in order to control the phase of the drive of the fan motor, it is first determined whether the timer interrupt is the first (901). If not, the fan motor is turned off (902), and the timer interrupt is prohibited. If the timer interrupt is the first timer interrupt, the fan motor is turned on and the timer interrupt is permitted (905).

Thereafter, such an interrupt is canceled and the process moves to the next stage.

In step (602), PID calculation is performed using the feedback signal of the rotation speed of the fan motor, and in step (603)
In this step, the feedback current of the linear gas pulp is A/D converted.

A subsequent step determines whether a 4364 millisecond count 705 was made while performing the clock interrupt. If 3.4 milliseconds have not been counted, that is, before 3.4 milliseconds have been counted in the clock interface, steps (602) and (603) continue.
) and at the clock interrupt step (705
) is performed, that is, after 3.4 milliseconds, clear the counter, move to the next step, and perform the key scan (
605) and key response (606) functions.

Next, the matrix will be rotated, but each loop of the reset routine will sequentially move the segment buffer (60
g) Display the clock, move the light emitting diode buffer, and display the abnormal status or eliminate the operating status display6.
09), perform A/D conversion of the room temperature thermistor current to display the temperature 61O), and convert the hot air thermistor current to A/D.
/D conversion and A/D conversion of the current associated with the gas type (611). This leads to faster system control as it reduces the time to perform the reset routine.

Furthermore, the warning buzzer is checked to prevent damage to the application equipment system; it is turned on for 50 milliseconds, turned on again for 500 milliseconds, and turned off for 500 milliseconds a predetermined number of times. (61)
2).

Furthermore, it is determined whether the mode is cooling mode or heating mode (613).

If it is determined that the mode is heating mode, it will be detected whether the ozone state of the warm air thermistor is overheated (614), and if it is overheated, it will be described later. Jumps to the driving sequence control block.

In step (615), flame rod short-circuit and ignition detection is performed, which is caused by an abnormal signal (120H!) from the frame rod ignition detection circuit in terms of hardware while executing a clock interrupt (step 700). This is possible because it receives a square wave). Therefore, as will be described in detail later during the operation sequence, if a flame rod ignition is detected, the engine will jump to block B, and if a misfire is detected, it will jump to block C, and if a misfire is detected during operation. jumps to block d, and jumps to block d when there is an abnormality in the flame rod ignition sensing circuit.

In step (616), the linear gas valve is controlled up and down, which is based on the data associated with the feedback current from the linear gas valve control circuit in hardware.

The steps from the reset stage (600) of the system up to the linear gas valve control stage (616) are called a reset routine, and this reset routine is used to perform PID calculations as the system performs room temperature control for heating operation sequence control. Become in control.

On the other hand, if it is determined in step (613) that the system control is for cooling, a delay counting operation is performed for a predetermined period of time, for example, 3 minutes (1100), and after 3 minutes it is determined whether the system is in operation. (iioB, if it is not in operation, it is turned off (1106), and if
If it is in operation, it is determined whether it is in timer operation (1102).

If the timer operation (1102) matches the set time, it is turned off (1103), and if not, the compressor is turned off after a delay time of a predetermined time, for example, 3 minutes, just like the timer operation. After driving the compressor (1104), the system enters a PID calculation control state while performing room temperature control (11Q5).

Further, to explain the heating operation sequence control step (1000), first, in step (1001), it is determined whether air is being blown.

It is assumed that when the air blowing is done, the 7 am motor is on and the burner motor is off (100°
2), This is called the air blowing block (0), which is formed when the hot air thermistor opens and overheats.

If air is not being blown, the process moves to step (1003) and it is determined whether the system is in operation (1003). If it is not in operation, determine whether the temperature of the hot air thermistor is below 40℃ (1004), and if it is below, turn off the burner motor and 7-amp motor (1005), and turn off the solenoid valve, linear gas valve, and igniter. , P
ID control is performed (1006).

If the system determines that it is in operation,
The process moves to the timer operation determination step (1007). At this stage, if the timer is running, the system will be turned off if it matches the set time (1008); if the timer does not reach the set time or if the timer is not running, the temperature of the hot air thermistor will be 50°C. 1009), the temperature of the hot air thermistor is 50℃.
If it is above, turn on the fan motor (1010),
If the temperature is 50° C. or lower, it is determined whether to perform a predetermined sequence 2 or higher (1011).

If sequence 2 or higher is not to be performed, turn on the burner motor, operate the linear gas pulp at low power (1012), perform the prescribed sequence l (1013), and turn off the wind pressure switch for at least 10 seconds. Judging by the clock interrupt (10
14).

If the wind pressure switch is off for more than 10 seconds, the stage (10
15) and the display device (1) indicates that it is in the reset state.
82, Fig. 2) displays the self-diagnosis function of "08". If not, it is determined whether the wind pressure switch is turned on (step 1016).

If the wind pressure switch is on, perform Sequence 2, move to step (1020) and judge whether the external interrupt has been performed for 1 second, and if the external interrupt has been performed, the temperature between the room temperature and the set temperature is Calculate the difference (
1021).

However, if the wind pressure switch is not turned on, it is determined whether sequence 2 or higher has been performed (1O18), and if it has been performed, it is reset and the process moves to step (1019). If the self-diagnosis function is displayed, the self-diagnosis function of ' is displayed, and if not, the PID control state is entered as if no external interrupt is executed for one second.

In step (1022), it is determined whether the fan is started, and while the fan is being started, step (1022) is started.
023), and it is determined whether the rotation speed of the fan is overspeed for 10 seconds or more. If the fan is overspeeding for more than 10 seconds, it will be reset and the self-diagnosis function will display "07" (IO24).

If the fan is not activated or the fan speed is not too high for more than 10 seconds, step (1025)
), it is determined whether sequence 3 or higher has been performed. If sequence 3 or above is not performed, count the pre-purge time 1026) Determine whether 30 seconds have passed 1027), perform PID control within 30 seconds, and clear the pre-purge time after 30 seconds 1028
) After performing sequence 3 (1029) and turning on the igniter (1030), PID control is performed.

On the other hand, if sequence 3 or higher is performed in step (1025), the process moves to step (1031), and it is determined whether sequence 5 or higher has been performed.

It is determined that sequence 15 or more has been executed, and jumps to step (1043) to be described later. If it is determined whether there is a misfire condition and sequence 5 or more is not performed, step (1043) is performed.
1032), and it is determined whether the igniter is activated and the ignition period of 1 second has elapsed. If the ignition does not last for 1 second or more, it is determined that the ignition is not detected, and in step (1033), it is reset and the self-diagnosis function "05" is displayed. In the post-ignition stage 1# (1024), it is determined whether sequence 4 is executed, and if not, the process moves to step (1035) to execute sequence 4, and in step (1034), the solenoid is turned on and PID control is performed. It will be done.

If the function of sequence 4 or higher is performed, it is determined whether ignition is detected (1037).

If no ignition is detected, the non-ignition time is counted (1038), reset to indicate the non-ignition time, '03#' is displayed, and if it is less than 3 seconds, PID control is performed. The stage (l
041) is called a misfire block (C). On the other hand, in the ignition block step (1037), a self-diagnosis function is attached to detect a misfire during the process due to exhaustion of the gas stored in the cylinder.

Specifically, as shown in the signal flow shown in FIG. 3, the microprocessor (1), while executing the main routine, determines whether or not the ignition has occurred in step (1037) at regular time intervals, that is, at intervals of one second. , if ignited, in step (1200) the 5 minute ignition sustaining plug is 1, i.e. 5
It is determined whether ignition is maintained for 5 minutes, and if ignition is not maintained for 5 minutes, a 5-minute ignition maintenance detection block g detects whether ignition is maintained for 5 minutes.

That is, in step (1202), it is determined whether the value of the first time counter is lO, that is, step (1202) is determined at 1 second intervals.
037) After 10 seconds have elapsed while repeating the process, determine whether the value of the first time counter is lO, and if the value of the first time counter reaches lO, clear the first time counter in step (1203). and step (1204)
1 is added to the second time counter that counts 10 unit seconds, and in step (1205) it is determined whether the value of the second time counter is 6, that is, 60 seconds have elapsed and the value of the second time counter is 6, and if the value of the second counter is 6, clear the second time counter in step (1206) and store the third time counter (1207) j:1 for counting units. , in step (1208), it is determined whether 5 minutes have passed and the value of the third time counter is 5.

If the 5-minute ignition maintenance detection block detects that ignition has been maintained for 5 minutes in this way, clear the third time counter in step (1209);
1 is stored in the 5-minute ignition maintenance flag, the misfire counter is cleared midway in step (1210), and the main routine is executed.

Furthermore, in the above case, if a misfire occurs due to burning out of the gas stored in the cylinder, etc., it is determined in step (1300) that there is a misfire in the middle, and the process proceeds to step (1301).
Clear the 5-minute ignition maintenance flag at step (130
After all the first to third time counters are cleared in step 2), 1 is added to the intermediate misfire counter in step (1303), and the value of the intermediate misfire counter is set to a constant value in step (1304), that is, to give an example. It is determined whether there has been a misfire three or more times in a row, and if there has been no misfire three or more times in a row, the main valve is shut off in step (1305) to prevent gas leakage, and the main valve is stopped in step (1305).
In step 306), the misfire program is set to 1, and in step (1304), if there are three or more consecutive misfires, the intermediate misfire counter is cleared in step (1307), reset in step (130g), and the self-diagnosis function is activated. "10" will be displayed, that is, gas burnout will be displayed.

Furthermore, in the above, the ignition is not performed in step (1037);
If there is no misfire during step (1300), it is determined whether there is an abnormality in the flame rod ignition sensor in step (1309), and if there is an abnormality, step (131) is performed.
0) and displays "09" of the self-diagnosis function, that is, indicates that there is an abnormality in the flame rod ignition sensing section, and if there is no abnormality, the main routine is executed.

Still referring to FIG. 6A, the misfire block and ignition block are subsequently executed in the main routine.

That is, after gas burnout is detected, if the gas is not burnt out, ignition is performed, and in the step of sensing ignition (1037),
If ignition is detected, the process moves to step (1o41), and it is determined whether sequence 5 or higher is performed; if not,
In step (1042), sequence 5 is performed and in step (1043) the igniter is turned off and PID #
If the engine is controlled and sequence 5 and above are executed thereafter, it will be determined whether there is a misfire condition (1043).

Here, steps (1041), (1042) and (1043
) is called ignition block (b).

If it is determined that there is a misfire in the misfire determination step (1043), further, in step (1o44),
It is determined whether there is a misfire during the process, and if there is a misfire during the process, sequence 2 is executed (1045), and after the linear gas valve and solenoid valve are turned off, PID control is performed (1046), ::-t' stage! (1043) to stage # (1046) is called a misfire block (d).

If there is no mid-fire misfire in the mid-misfire stage (1044), it is determined whether the flame rod ignition sensing circuit is abnormal at stage (1044).
1047), and if there is no abnormality, the PID control state is entered, but if there is an abnormality, the state is changed to step (1047).
4g) to display 09''. Here, steps (1047) and (1048) are referred to as the flame rod ignition sensing block (E).

If it is determined in step (1043) that there is no misfire, the process moves to step (1049) and it is determined whether sequence 7 or higher is being executed.If not, the weak fire period is counted and 1osO
), determine whether the low flame period will be 30 seconds or more, and if it is not 30 seconds, proceed with sequence 6 (1053).
, 30 seconds have passed I; later performs sequence 7 and PI
D is controlled (1052).

If it is determined in step (1049) that sequence 7 or higher is to be performed, the process moves to step (1054) and it is determined whether to operate based on the ability value.

If not, it is determined whether the room temperature has increased in step (1055), and if it is the capacity value, step (105)
In step 6), it is determined whether the room temperature has increased.

If the room temperature is raised in step (1055),
Step (1) of determining whether the indoor temperature settings are the same
060), and if the room temperature does not rise, it moves to step (105).
7) and determine whether the temperature difference is 1 degree or more.

Therefore, if the temperature difference is not more than 1 degree or the indoor temperature is the same as the set temperature, the power is turned off (106).
5), and if the temperature difference is 1 degree or more or the indoor temperature and the set temperature are not the same, the power supply becomes weak (10
64).

In step (1056), it is determined whether the room temperature has increased. At this time, if the room temperature rises, stage (1)
058), it is determined whether the temperature difference is 2 degrees or more.
If the difference is more than a degree, the power supply becomes stronger (1063)
If there is no difference of 2 degrees or more, it is determined whether the indoor temperature and the set temperature match (1061). If the indoor temperature and the set temperature match, the process moves to step (1065) and the power is turned off. If they do not match, the process moves to step (1064) and the power is weakly applied. On the other hand, stage (1056)
If the temperature difference in the room is not raised at step (1059), it is determined whether the temperature difference is 3 degrees or more, and if it is 3 degrees or more, the process moves to step (1062) where the power is applied strongly and the temperature is If there is no difference of 3 degrees or more, further steps (
1062), it is determined whether the temperature difference is 1 degree or more. In step (1062), if the temperature difference is 1 degree or more, the process moves to step (1064) in which the power is weakly applied, and if the temperature difference is 1 degree or less, the power is turned off.

Here, stage (1063) indicates the strong operation of sequence 8, and stage (1064) indicates the weak operation of sequence 7.

As described above, the system of the present invention in operation has an operating sequence as illustrated in FIG.

FIG. 7-1 shows the heating (strong) operation sequence during heating. When the operation stop switch 138 is turned on, the system is in operation, so the steps after the step (1003) in FIG. 6 (1010 ), (1012), and (1017), the combustion burner motor 413, the operating light emitting diode 190, and the linear gas pulp 237 are driven at the same time.

In the next step (IQ 14), the wind pressure switch (
106) is turned on in the off state for less than 10 seconds, and the stage (1
025) and the prepurge steps (1026) and (1027) of sequence 3.

After performing steps (1029) and (1030), step (10
In 32), the ignition of sequence 4 has already been performed for 1 second, and it is determined that the ignition detection period of sequence 5 will be longer than 1 second, and the ignition transformer 282 is activated for more than 2 seconds, and at the same time, the ignition sensor 281 is activated. You can know that it has been activated. At this time, simultaneously with the start of sequence 5, ignition detection of the first and second electronic valves 408 and 409 and the flame rod 262 is started.

Ignition sensing by the flame rod 262 generates a 60 Hz rectangular wave by the ignition sensing circuit of the flame rod as described above.

Thereafter, in step (1049), the low-power state is advanced for 30 seconds while performing sequence 7, and the operation and combustion of the linear gas valve 237 are in the low-power state until the end of the period, and after a predetermined time, the high-power state is activated. become.

During this operation, if the temperature difference between the room temperature thermistor 251 and the set temperature is about 1 degree, as in step (1057) and steps (1061) and (1062), the operation becomes weak and the step ( 1060), (1061), (1
062), the power is turned off. This phenomenon is called driving hysteresis off.

At this time, as mentioned above, when the combustion state changes from strong operation to weak operation, the room temperature thermistor 251 performs one-step off operation, and when the operation hysteresis turns off, two-step off operation is performed. On the other hand, the convection fan motor 222 starts to be operated weakly when the room temperature thermistor 251 is turned off in one step.

Thereafter, when the off period of the operation hysteresis ends, that is, when the difference between the indoor temperature and the set temperature becomes at least 1 degree, the heating operation is restarted and the sequence is the same as above, sequence 3 and sequence 4. The process of sequence 5 begins. To stop the heating (strong) operation during operation, if the run/stop switch 138 is turned off, step (
1003), the combustion burner motor 413, wind pressure switch 106, and convection fan motor 222 are operated until it is detected that the hot air thermistor is below 40°C. The period is set to about 30 seconds, and within that period, the burner motor and fan motor are opened as in the post-bost purge step (1005).

Fig. 7-2 shows a heating (weak) operation sequence, which is similar to the cooling (high-power operation sequence) shown in Fig. 7-1, except that there is no strong operation in the combustion state, and there is a weak operation. The only difference is what is done.

FIG. 7-3 shows the ventilation operation sequence.

In the ventilation operation, if it is determined that the ventilation key is turned on at step (1001), the burner motor 413 is turned off, the fan motor 222 is turned on, and the operation continues at step (1001).
02), hereinafter the first and second solenoid valves 408,
Turn off the 409 linear gas valve 237, igniter 281, etc.

Of course, the fan lamp 201 is turned on while the fan motor 222 is operating.

From now on, when the blower key is turned off, the run/stop switch 13
8 is further operated on.

Figure 7-4A is a diagram showing the misfire operation sequence,
Operation of the System Sequences 3 and 4 are performed during the system and jump to block C to step (103)
If no ignition is detected by the flame rod 262 in step 7), the process moves to step (l O39), and if it is determined that the non-ignition has been detected for 3 seconds or more, the system is automatically stopped and the reset LED 204 is turned on. Turn on the light.

Of course, the first and second solenoid valves and the linear gas valve operate until the misfire period (3 seconds) ends.

In particular, in step (1037), it is detected whether there is a non-ignition condition due to gas burnout as shown in FIG. 68, and this sequence is illustrated in FIG. 7-4B.

In other words, if a timing diagram shows the detection of a misfire during ignition operation, if there is no ignition input and a misfire is determined during the ignition operation, the combustion LED will be extinguished, the main valve will be shut off, and combustion will be stopped. On the next page, while operating the igniter, the combustion LED is turned on, the main valve is opened, and the combustion occurs to ignite. If this operation is repeated three or more times in succession, and a misfire occurs midway through, the operation will be stopped. I will do it.

As mentioned above, if the gas in the cylinder is burnt out and misfires during the process, this will be detected and the operation of the cooling/heating gas custom heater will be stopped, resulting in a trace amount of gas remaining in the cylinder leaking out and causing an explosion and fire. Of course, it is important to prevent
This has the effect of allowing the user to quickly sense the exhaustion of gas and replace the cylinder to supply gas.

Thereafter, after removing the cause of the abnormal condition, turn on the operation stop switch 1.
38 is turned on, the reset LED 204 is extinguished and the heating operation sequence of Figures 7-1 and 7-2 is performed. Figure 7-5 shows the sequence when a misfire occurs during operation. In the case of a misfire, it occurs after the operation sequence 5 has been completed, and the misfire occurs at stage (1).
043), if there is a mid-fire misfire, the mid-misfire block (d) is executed, and if there is no mid-fire misfire, the misfire block (E) is executed. Therefore, in the misfire sequence, the first and second solenoid valves 40
8,409, the driving of the linear gas pulp 222, frame rod 262, fan motor 222, and burnout LED 198 is stopped, and at the same time, the combustion state is also stopped.

After removing the cause of the abnormal condition, the system will restart according to the normal operation sequence when restarting the system. Figure 7-6 relates to the overheating prevention operation sequence, in which the hot air thermistor 241 for sensing overheating prevention is turned off in the event of overheating, the run/stop switch 138 is turned off at the same time, and all operation sequences are turned off. It is considered off, but the stage (10
As shown in 04), the hot air thermistor 241 is 40
The burner motor 413 and the fan motor 223 operate until the temperature drops below 0C, and the post-purge function is performed for a predetermined time of 30 seconds. At this time, the reset LED 204
lights up and the buzzer 212 begins to emit a warning sound for 20 seconds.

Thereafter, if the hot air thermistor 241 is further turned on, the normal operation heating sequence will be executed, and the drawing shows that the heating (strong) operation sequence will be executed.

Fig. 7-7 shows the sequence when the hot air thermistor detects the ozone state, and is the same as the operation sequence during overheating shown in Fig. 7-6.

Figures 7-8 show the ignition undetected operation sequence.

If the ignition is not detected, the stage (lO32
), it is determined whether the ignition period has elapsed for 1 second, and if 1 second has not elapsed, ignition is not detected, which means that the ignition transformer 282 was activated for less than 1 second.

Therefore, if ignition is not detected, the operation/stop switch 138 is reset and turned off, the reset LED 204 lights up, and the buzzer 212 is driven for 20 seconds to emit a warning sound. Thereafter, when the cause of the abnormal condition is removed, the heating (high) is turned on while the run/stop switch 13g is turned on.
Even if the (low) operation sequence is performed, the heating (strong) operation sequence is illustrated in the drawing.

FIG. 7-9 shows the flame rod shot detection sequence. In step (615), the frame rod ignition detection circuit 206 receives the flame rod ignition detection circuit (109Hz square wave) for 10 seconds due to the clock interrupt, so the operation is stopped. /Stop switch 138 is turned off.

Therefore, the system jumps to block (e), the system is reset, the reset LED 204 is lit, the fan motor 413 etc. are driven for 30 seconds to perform the bottom purge, and at the same time the buzzer 212 is driven for 20 seconds to emit a warning sound. become.

From now on, when the operation is restarted after removing the cause of the abnormal condition, the 7th-
The system is operated according to the heating operation sequence shown in FIG. 1 and FIG. 7-2.

Figures 7-10 relate to the timer operation system.

It is determined whether the timer operation is a timer operation in step (1007), and if the time matches the timer setting time, the run/stop switch 138 is turned off in step (1007). However, the burner motor 413 and the 7mm motor 222 operate until the temperature of the hot air thermistor becomes 406C or less.

Figures 7-11 relate to the on-sensing sequence of the wind pressure switch, and the step (101) after sequence l is performed.
4), it is determined by the clock interrupt whether the wind pressure switch is delayed for more than 10 seconds, and the run/stop switch 138, which has been delayed for more than 10 seconds, is turned off, and the reset LED 204 is reset while the system is being reset. is lit, and the buzzer 212 is activated for 20 seconds to emit a warning sound. Thereafter, when the cause of the abnormal condition is removed and the operation/stop switch 13B is turned on, the heating operation shown in FIGS. 7-1 and 7-2 starts, and the heating (strong) operation is performed as shown in the drawings.

Meanwhile, the system of the present invention is related to cooling operation and is transferred to step (1100) in FIG.

FIG. 8 shows the sequence during cooling operation.

FIG. 8-1 shows the sequence for normal operation during cooling, in which the room temperature thermistor 25 and the cold air prevention thermistor 51 are activated before the operation/stop switch 138 is activated.
6 is activated. When the run/stop switch 138 is activated, it is determined that cooling is being performed in step (613) and the air conditioner is operated.When the room temperature thermistor 251 is turned off, the compressor and outdoor fan are turned off due to operation hysteresis. Compressor control magnetic contactor 505 is not activated so that motor 503 is delayed for three minutes.

Here, operation hysteresis refers to the stage (1 stage) when driving the compressor.
100), it means performing a 3-minute delay counting operation. Next, further room temperature thermistor 25
If the capacity selection switch 1 is turned on, the compressor will operate again, and if the capacity selection switch is selected as strong as shown in the drawing, the 77 motor will operate strongly, and if it is selected as weak, the fan motor will operate weakly. be done.

No. 8-21!7 shows the operation sequence when blowing air, in which the operation stop switch 138 is stopped during the 3-minute delay period of the compressor drive condition, but only the fan motor 222 is operated. This is done in the following sequence.

Figure 8-3 shows the antifreeze sequence.

This sequence is such that when the hot air thermistor 516 is turned off, the compressor 516 and the like are turned off for three minutes or more.

Figure 8-4 shows a 3-minute delay sequence for the compressor during a momentary power outage.It detects whether there is a momentary power outage of 30 milliseconds during a power outage, and if it is not a momentary power outage, the compressor 516 etc. is turned off for 3 minutes. do.

〔Effect of the invention〕

As explained above, according to the present invention, during automatic operation, the difference between the room temperature and the set temperature can be controlled within 3 degrees as much as possible, and when an abnormal condition occurs, the reset LED is turned on and , it is possible to obtain a self-diagnosis function that displays digits associated with abnormal conditions. Therefore, the present invention can provide better performance than manual operation in the conventional device.

That is, if we refer to the graph related to the prior art in Figure 9A, the room temperature control is controlled arbitrarily according to the set temperature (TA), but in other words, if the temperature difference is 3 degrees or more, high operation is performed, and 2 degrees or more is activated. If it is below 1 degree, it is weak operation, and when it is 3 degrees or below, it is strong operation.As shown in Figure 9B, the error between the indoor temperature and the set temperature is based on the time axis. It has been shown that the difference between the highest and lowest room temperatures is enormous. That is, the difference between the highest and lowest temperatures is about 8 degrees.

However, in the present invention, as shown in the operation flowchart of FIG. 6, the maximum temperature of the room temperature is controlled based on the time axis as shown in FIG. The difference between the current temperature and the lowest temperature will almost disappear. That is, it is controlled so that the difference does not exceed about 3 degrees.

Furthermore, as shown in the key table between the room temperature and the sensible temperature in Fig. 1θ, when it is assumed that the temperature change is felt at a maximum of ±4 degrees, the present invention is considered to have almost no difference in the sensible temperature, so it is always The system can be operated in a comfortable state.

Furthermore, since the present invention has self-diagnosis functions such as non-ignition operation, misfire operation, over-ripe operation, hot air thermistor open detection operation, ignition detection operation, flame rod detection operation, etc., abnormal conditions can only be known during heater operation. Therefore, equipment can be inspected in response to abnormal conditions and countermeasures can be taken efficiently.

[Brief explanation of drawings]

Fig. 1 is a schematic block diagram of a conventional cooling/heating gas custom heater, Figs. 2 to 10 show an embodiment of the present invention, and Fig. 2 has a self-diagnosis function according to the principle of the present invention. 3 is an arrangement diagram of an external panel device configured according to the principles of the present invention, FIG. 4 is a circuit diagram accompanying the AC wiring of the present invention, and FIG. 5 is a circuit diagram showing the control circuit according to the present invention. Block diagram schematically showing the entire system of the invention, No. 6A
Figures (A) to (E) are overall flowcharts showing the operation according to the principle of the present invention, Figure 6B is a 70-chart showing the non-ignition detection operation at the time of gas burnout according to the principle of the present invention, and Figure 7 Figures 7-1 to 7-11 show the heating operation sequence according to the principle of the present invention. Figure 7-1 shows the heating (strong) operation, Figure 7-2 shows the heating (weak) operation, and the Figure 7-3 shows ventilation operation, Figures 7-4A and 4B show non-ignition operation and non-ignition detection operation due to gas burnout, @Figure 7-5 shows misfire operation, and Figure 7-4 shows misfire operation.
Figure 6 shows operation during overheating, Figure 7-7 shows hot air thermistor ozone sensing operation, Figure 7-8 shows ignition sensing operation, Figure 7-9 shows flame rod sensing operation, and Figures 7-10 and 7 -1
Figure 1 is a timing chart showing timer operation and wind pressure switch-on sensing operation, Figures 8-1 to 8-4 show the cooling operation sequence according to the present invention, and Figures Figure-2, Figure 8-3, and Figures 8 to 4 are timing diagrams showing normal operation, ventilation operation, anti-freezing operation, and compressor operation during momentary power outage, respectively, and Figure 9 is a timing diagram showing the conventional system. FIG. 9A and B are graphs related to the conventional system, FIG. 9C is a graph related to the system of the present invention, and FIG.
Figure 0 is a sensory key table.

Claims (1)

[Claims] 1) In an air-conditioning gas custom heater control circuit with a self-diagnosis function, which is composed of a microprocessor that controls multi-stage thermal power control and operation sequences, first, a large number of systems perform an initialization operation. A microprocessor is equipped with an operating state detection means, etc., and a rectangular wave with a predetermined cycle is used as an external interrupt signal, so that the microprocessor executes an external interrupt during initialization and checks the initial operating state. A rectangular wave circuit is used to differentiate and control the normal operating state and abnormal operating state while executing a predetermined system operating sequence.
- A heating/cooling gas custom heater control circuit having a self-diagnosis function, which includes a digit drive circuit section, a display section, etc. that displays a predetermined self-diagnosis for abnormal operating conditions of the system after initialization. 2) Sensor means for which the microprocessor generates data for controlling the operation sequence, including fan motor rotation sensing means, igniter operation sensing means, flame rod ignition sensing means, room temperature sensing and warm air sensing. An air-conditioning/heating gas custom heater control circuit having a self-diagnosis function as set forth in claim 1, which comprises means and the like. 3) Claim 1 comprising a display means for displaying the operating state while the microprocessor executes an operating sequence, a means for emitting a warning sound of an abnormal state, and a display means for displaying this state in digits, etc. An air-conditioning gas custom heater control circuit having a self-diagnosis function as described in 2. 4) In a heating/cooling custom heater control method with a self-diagnosis function, an external interrupt and a clock interrupt are permitted in the initial stage, and at the same time, matrix rotation is performed in the clock interrupt, and timer permission is completed in the clock interrupt. and a reset routine that is performed at the hot air thermistor oven and overheat detection, flame rod short circuit detection, and linear gas valve control stages for self-diagnosis; Sequence 1 that turns on operation in a predetermined operation sequence
, the sequence 2 for turning on the wind pressure switch, the pre-purge sequence 3, the pre-ignition sequence 4, the ignition detection sequence 5, the low flame sequence 6, the heating (low) operation sequence 7, the heating (strong) operation sequence 8, and a predetermined routine. When an abnormal condition occurs during a driving sequence, it consists of a routine that performs system operation of the self-diagnosis function, and as the driving sequence progresses, a normal operation display, an abnormal state display, a reset display, a buzzer drive, and a digit display are displayed. A heating and cooling gas custom heater control method with a self-diagnosis function. 5) When external interrupts are allowed, a clock interrupt is executed and an external interrupt is executed at the same time. An air-conditioning gas custom heater control method having a self-diagnosis function according to claim 2, which is performed by a rapto routine. 6) Air blower block; Timer operation block; Warm air thermistor operation block; Wind pressure switch operation block; Prepurge operation block;
Ignition block; Misfire block; Misfire block;
A heating and cooling gas custom heater control method having a self-diagnosis function according to claim 2, which is performed by an operation sequence consisting of a flame rod misfire detection block; a strong operation block, a weak operation block, etc. . 7) In the ignition block, there is a stage in which misfire detection due to gas burnout detects whether ignition is maintained for a certain period of time when the igniter is activated, and if misfire occurs midway within a certain period of time,
The cooling/heating gas custom having a self-diagnosis function as set forth in claim 6, comprising steps of counting the number of consecutive misfires, and resetting and stopping the operation when the number exceeds a certain number of times. Heater control method.