KR930005210B1 - Controller for plural control - Google Patents

Abstract

The apparatus adopts a reset circuit to simplify the system. The apparatus includes a first CPU (91) for executing control program, for communicating data with a second CPU, a second CPU (92) for executing control program and for generating reset signal to reset the first and the second CPUs (91,92) a reset signal generator (94) for transmitting reset signal to the second CPU (92). The reset signal generated by the second CPU to reset the first CPU is transmitted through a transmission wire (92c) and NOT circuit (92d).

Description

Control device of multiple control circuits

1 is a block diagram showing an essential part of a control device of a heating / additional hot water supply device for both heating and employing the present invention.

2 is a block diagram showing a control device of an additional heating and hot water supply apparatus for heating employing the present invention.

3 is a schematic diagram showing an additional heating hot water supply device combined with heating.

4 is a reset control operation flowchart of the control device of the additional heating and hot water heating device for heating.

5 is a block diagram showing the main part of a control apparatus of a conventional multiple control circuit.

* Explanation of symbols for main parts of the drawings

1: additional hot water heating device for hot water heating 2: combustor for gas combustion hot water

3: combustion gas burner

9: control device (control device of plural control circuits)

20: hot water controller 30: heating controller

91: first CPU 92: second CPU

93: third CPU 94: reset circuit

The present invention relates to a control apparatus of a plurality of control circuits having a reset circuit for outputting a reset signal to the control circuit.

Conventionally, there existed a control apparatus provided with a plurality of control circuits and a reset circuit for outputting a reset signal to the plurality of control circuits when energization is started. One control circuit of the plurality of control circuits operates in accordance with the control procedure when energized, and resets when a reset signal is input. The control circuit on the other side of the plurality of control circuits operates according to the control procedure when energized, resets itself when the reset signal is input from the reset circuit, and then outputs the reset signal to one control circuit.

Here, for example, as shown in FIG. 5, the control circuit 120 on one side controls the control circuit 110 on the other side to determine whether one control circuit 110 is operating in the order of control. Even when not operating according to the procedure, the control apparatus 100 which outputs a reset signal from the other control circuit 120 to one control circuit 110 is proposed.

However, in one control circuit 110 of the control device 100 shown in FIG. 5, the input terminal 111 and the reset signal of the reset signal output from the output terminal 121 of the other control circuit 120 are reset. Two types of input terminals 112 of the reset signal output from the output terminal 131 of the set circuit 130 are required. In the control apparatus 100, two types of transmission wirings 141 and 142 for connecting the plurality of output terminals 121, 131 and the plurality of input terminals 111, 112 are required. .

Therefore, there is a problem in that the combinability of products is poor because parts management is difficult due to an increase in the number of parts and complicated installation of transmission wiring.

As one method for solving these problems, as shown in FIG. 6, the control device 100 is used as one input terminal 113 by commonizing the two types of input terminals 111 and 112 of the one-side control circuit 110, but in this case, Since an OR circuit 143 is required, there is a problem that the unit price is higher than that of the control device 100 shown in FIG.

An object of the present invention is to provide a control device of a plurality of control circuits which can reduce the number of parts and the unit cost, improve the combinatoriality of products, and facilitate parts management.

The control device of the plurality of control circuits of the present invention operates in accordance with the control procedure when energized, and operates in accordance with the first CPU as the first control circuit which resets when the reset signal is input, and operates in accordance with the control procedure when energized. And a second CPU as a second control circuit for outputting a reset signal to the first CPU and a reset circuit for outputting a reset signal to the second CPU. The control device of the multiple control circuit of the present invention has the following functions.

When it is necessary to reset the first CPU and the second CPU by the reset circuit, the reset signal is output from the reset circuit to the second control circuit.

When the reset signal output from the reset circuit is input to the second CPU, the second CPU is reset and outputs the reset signal from the second CPU to the first CPU.

When the reset signal output from the second CPU is input to the first CPU, the first CPU is reset.

In the control apparatus of the plurality of control circuits of the present invention, since the reset circuit and the first control circuit are electrically connected through the second CPU, for example, the input terminal of the reset signal and the transmission wiring of the reset signal can be made common. The number of parts can be reduced, and the unit cost can be lowered.

In addition, since the combinatoriality of the products can be dramatically improved, and the number of parts is reduced, parts management becomes easy.

Next, a control device of a plurality of control circuits of the present invention will be described according to the embodiment shown in FIGS.

1 is a block diagram showing the main part of the control device of the additional heating hot water supply apparatus for dual use according to the present invention, and FIG. 2 is a block diagram showing the control device for the additional heating hot water supply unit for combined use according to the present invention. The figure shows an additional heating hot water heater combined with heating.

1 denotes an additional hot water supply system for both hot water and hot water in the bathtub or kitchen, which can be heated additionally during the bath and heated indoors.

The additional hot water supply device for combined hot water heating (1) includes a combustor (3) for gas-fired hot water supply, a water supply pipe (4), a circulation circuit for additional heating of bath water (5), a heating circulation circuit (6), a gas supply pipe (7) and an expansion The tank 8 is provided. The hot water combustor 2 is provided with the heat exchanger 24 for hot water in the combustion case 21. As shown in FIG.

The hot water gas burner 22 is a forced blowing gas burner that mixes and combusts the fuel gas supplied from the gas supply pipe 7 and the combustion air supplied by the hot water supply blower 23 at a predetermined air-fuel ratio. Combustion gas generated by combustion is discharged from the exhaust hole 25 to the outside of the combustion case 21. The hot water gas burner 22 is provided with a hot water sparker 2a as a fold means, a hot water frame rod 2b for detecting flame, and a hot water thermocouple 2c for detecting an air-fuel ratio. have.

The hot water blower 23 is an electric fan that, when energized, generates an air flow toward the gas burner 22 for hot water in the combustion case.

The hot water heat exchanger 24 heats the water flowing in the water supply pipe 4 by the heat of the flame and the combustion gas generated by the hot water gas burner 22.

The combustor 3 for heating is provided in the combustion case 31 with the gas burner 32 for heating, the blower 33 for heating, and the heat exchanger 34 for heating.

The heating gas burner 32 is a forced blowing gas burner that burns fuel gas supplied from the gas supply pipe 7 and combustion air supplied by the heating blower 33 at a predetermined air-fuel ratio. The generated combustion gas is discharged from the exhaust port 35 to the outside of the combustion case 31. In the vicinity of the heating gas burner 32, a heating speaker 3a as an ignition means and a heating frame rod 3b for detecting a flame are provided.

The heating blower 33 is an electric fan which, when energized, generates an air flow toward the gas burner 32 for heating in the combustion case.

The heat exchanger 34 for heating heats the water flowing in the water supply pipe 4 by heat owned by the flame and combustion gas generated in the heating gas burner 32.

The water supply pipe 4 is a water supply pipe 41 for supplying water from the public water pipe to the hot water heat exchanger 24, a hot water supply pipe 42 for supplying hot water to the kitchen downstream of the hot water heat exchanger 24, And a supply water pipe 44 for supplying water to the expansion tank 8 upstream of the hot water heat exchanger 24, which is separated from the hot water supply pipe 42 and supplies hot water to the bathtub. .

The water supply pipe 41 has a water supply temperature thermistor 4a as a temperature detection means, a governor-type water flow control valve 4b for adjusting the water supply amount by proportionally controlling the water pressure, and hot water when the tapping temperature is a high temperature at a set temperature. A bypass control valve 4c and a flow rate sensor 4d for detecting a supply amount of water, and the hot water supply pipe 42 has a first hot water temperature for hot water for detecting a water temperature heated by the hot water heat exchanger 24. Hot water flow for the hot water supply by detecting whether there is water flow in the thermistor 4e, the second hot water temperature thermistor 4f for hot water, and the hot water supply pipe 42, which detects the water temperature after heat exchange or the water temperature when water and hot water are mixed. The switch 4g is provided.

The piping 43 is a solenoid valve 4b for supplying bath water at the time of energization, a vacuum release valve 45 which communicates with the atmosphere in the piping 43 and the atmosphere when negative pressure occurs, and prevents a backflow of hot water, and a backflow of hot water. Check valves 46 and 47 for preventing the flow of water, and an electric three-way valve 4i for switching the hot water supply of the bath and the additional heating to be described later.

The replenishment water supply pipe 44 is provided with the replenishment water solenoid valve 4j which replenishes water to the expansion tank 8 when it is energized by the state in which the water supply 48 is open.

The bath water additional heating circulation circuit 5 is a circuit for additionally heating hot water existing in the bath. The water flow switch 5a for detecting whether there is a flow of water in the circuit and a bath for detecting the water temperature of the bath. The temperature thermistor 5b, the hot water circulating in the bath receiving pump 5c for circulating the bath water additional heating circulation circuit 5 by drawing hot water present in the bath, and the circulation circuit 5 for additional bath water heating. The bath heat exchanger 51 which reheats water by the hot water which circulates in the heating receiving circuit 6 is provided.

The heating circulation circuit 6 is a circuit for reheating the water radiated by a heating radiator (not shown) embedded in the room or returning it to the expansion tank 8 again. The heating circulation circuit 6 is a heating circulation pump 6a for pumping water present in the expansion tank 8 to the heat exchanger 34 for heating, and for heating for detecting the temperature of hot water heated by the heating heat exchanger 34. The tapping-on thermistor 6b is provided. The heating circulation circuit 6 further includes an additional heating bypass pipe 61 for reheating hot water circulated in the bath water reheat circulation circuit 5 by the hot water with the bath heat exchanger 51. This additional heating bypass pipe 61 is provided with a solenoid valve 6c for supplying hot water heated by the heating heat cooler 34 to the bath heat exchanger 51 at the time of energization.

The gas supply pipe 7 is a hot water gas pipe 71 for guiding fuel gas from the public gas pipe to the hot water gas burner 22 and a heating gas pipe for guiding fuel gas from the public gas pipe to the heating gas burner 32. 72 is provided.

The hot water supply gas piping 71 controls the gas pressure by proportionally controlling the gas supply solenoid valve 7a, the hot water supply solenoid valve 7b, and the gas pressure which supply fuel gas to the hot water gas burner 22 at the time of energization. Switching valve for hot water supply to switch the proportion of the gas proportional valve 7c for hot water supply to the gas proportional valve 7c and hot water gas burner 22 which control supply amount, 7d). The heating gas piping 72 controls the supply amount of fuel gas by proportionally controlling the heating solenoid valve 7e, the heating solenoid valve 7f, and the gas pressure which supply fuel gas to the bath gas burner 32 when energized. A gas proportional valve for heating 7g is provided. Expansion tank (8) is a temporary collection of make-up water. The upper part of the expansion tank 8, the inlet port 81 for introducing the replenishing water from the replenishing water pipe 44 therein and the port for adjusting the replenishing water when the quantity of the replenishing water is greater than the set quantity. 82 is formed. In addition, the lower portion of the heating inlet port 83 for introducing hot water after heat dissipation from the radiator of the heating circulation circuit 6 and the heating outlet port for allowing the internal water to flow out to the heat exchanger 34 of the heating circulation circuit 6. The bypass inlet port 85 for introducing hot water after heat dissipation in the 84 and the bath heat exchanger 51 is formed.

In addition, the expansion tank 8 includes a first front switch 8a, a second front switch 8b, and a third front switch 8c.

When the water level of the replenishment water in the expansion tank 8 reaches the first predetermined water level, the first front switch 8a blocks and outputs the first water level signal. The second front switch 8b closes when the level of the feed water in the expansion tank 8 reaches the second predetermined level and outputs a second level signal. When the water level of the replenishment water in the expansion tank 8 reaches the third predetermined water level, the third front switch 8c blocks and outputs the third water level signal. The water level is higher in the second predetermined level than the first predetermined level, and higher in the third predetermined level than the second predetermined level. Next, the control device 9 of the heating material heating / hot water supply device 11 according to the control device of the plurality of control circuits of the present invention will be described.

The control device 9 includes a first CPU (microcomputer) 91 as a first control circuit according to the present invention, a second CPU (microcomputer) 92 as a second control circuit according to the present invention, and a third CPU (microcomputer). 93, a reset circuit 94, a CPU power supply circuit 95, and a manual controller 96 according to the present invention.

The first CPU 91 is supplied with electricity and performs operations described below while transmitting and receiving with the second CPU 92 in accordance with the control procedure.

The first CPU 91 includes a heating frame rod 3b for heating, a water flow switch 5a for bathing, a temperature thermistor 5b for bathing, a first front switch 8a, a second front switch 8b, and a third front switch 8c. ) Receives the detection value and the water level signal.

The first CPU 91 according to the input signal or detection value, the heating sparker 3a, the replenishment water solenoid valve 4j, the electric three-way valve 4i, the bath circulation pump 5c, and the heating circulation pump 6a. ), The heating controller 30 of the solenoid valve 6c for bath, the solenoid valve 7e for heating, and the solenoid valve 7f for heating is energized. When the reset signal is input from the reset input terminal 91a, the first CPU 91 resets the heating controller 30 to a safe state.

The second CPU 92 has a first time timer 90a and, when supplied with electricity, performs the operation described below in accordance with the control procedure.

The first time timer 90a checks the information exchange between two control circuits such as the first CPU 91 and the second CPU 92 and the program of the second CPU 92 itself, It has the function of judging failure when response and operation are not started.

The first time timer 90a sends an off signal to the CPU power supply circuit 95 when it is determined that the control states of the first CPU 91 and the second CPU 92 are faulty.

The second CPU 92 receives a predetermined signal from the first CPU 91 and the manual controller 96. The second CPU 92 receives a detection value from the heating air volume sensor 9a for detecting the weight of the heating blower 33 and the tapping and temperature thermistor 6b for heating. The second CPU 92 controls the energization of the heating gas proportional valve 7g and the heating blower 33 in accordance with the input signal or detection value.

When the second CPU 92 receives the reset signal through the reset input terminal 92a, the second CPU 92 resets the heating gas proportional valve 7g and the heating blower 33 to a safe state, and then resets the reset output terminal. At 92b, the reset signal is output to the reset input terminal 91a of the first CPU 91 via the transmission wiring 92c and the NOT circuit 92d.

Further, even when the second CPU 92 determines that the control state of the first CPU 91 is faulty, the second CPU 92 is connected to the second CPU 92 through the transmission wiring 92c and the NOT circuit 92d at the reset output terminal 92b. A reset signal is output to the reset input terminal 91a.

The third CPU 93 has a second time timer 93a and operates as described below while transmitting and receiving with the second CPU 93 in accordance with a control procedure when electricity is supplied. The second time timer 90a has a function of monitoring the time between the two controls of the third CPU 93 and judging a failure when the next control does not start even after a predetermined time has elapsed. This second time timer 90a sends an off signal to the CPU power supply circuit 95. The third CPU 93 includes: a hot water flow rate sensor 9b for detecting the air flow rate of the hot water blower 23, a hot water frame rod 2b, a hot water thermocouple 2c, a water temperature thermistor 4a, and a flow rate The detection value is input from the sensor 4d, the first hot water supply thermistor 4e for hot water supply, the second hot water temperature thermistor 4f for hot water supply, and the water flow switch 4g for hot water supply. The third CPU 93 supplies the hot water sparker 2a, the governor type water flow control valve 4b, the bypass control valve 4c, the hot water source solenoid valve 7a, and the hot water supply according to the input signal or the detected value. The electric heating control of the solenoid valve 7b, the hot water gas proportional valve 7c, the hot water supply switching valve 7d, and the hot water supply blower 23 is carried out.

The third CPU 93 resets the hot water supply controller 20 to a safe state when the reset signal is received through the reset input terminal 93a.

The reset circuit 94 is electrically connected to the reset input terminal 92a of the second CPU 92 and the reset input terminal 93a of the third CPU 93 via the transmission wiring 94a.

The reset circuit 94 is reset when a power-on signal, which is a signal for starting energization of the first CPU 91, the second CPU 92, and the third CPU 93, or by a reset button (not shown). When a signal is input to the reset circuit 94, the timer is configured by a timer in which a reset signal is incorporated into the reset input terminal 92a of the second CPU 92 and the reset input terminal 93a of the third CPU 93. Only time is printed.

The CPU power supply circuit 95 is a circuit for supplying an operating voltage (for example, 5V) to the first CPU 91, the second CPU 92, and the third CPU 93.

The CPU power supply circuit 95 stops supplying the operating voltage to the first CPU 91, the second CPU 92, and the third CPU 3 when the OFF signal is input.

The manual controller 96 includes a hot water supply operation switch for turning on and off the hot water combustor 2, a temperature setting unit for setting the tapping temperature of the hot water combustor 2, and the on / off operation of the heating combustor 3. A heating operation switch for controlling, a bath operation switch called on / off control of the water in the bath, and a switching switch (not shown in the drawings) for switching the reheating of the bath water and the bath water.

4 is a flowchart showing an operation state of reset control in the first CPU 91, the second CPU 92, and the third CPU 93. As shown in FIG.

First, in the second CPU 92 and the third CPU 92, it is determined whether or not the reset signal is input from the reset circuit 94 (step 91). When the reset circuit 94 receives the reset signal, the count of the built-in timer of the reset circuit 94 is started (step S2).

Then, in the second CPU 92, the heating gas proportional valve 7g and the heating blower 33 are reset (step S3). In the third CPU 93, the hot water supply controller 20 is reset (step S4). In the first CPU 91, it is determined whether or not the reset signal is input from the second CPU 92 (step S5). When the reset circuit 94 does not receive the reset signal, the control of the step S5 is repeated.

In step S5, when the reset signal is received from the second CPU 92, the heating controller 30 is reset in the first CPU 91 (step S6). Thereafter, the control of step S1 or less is repeated.

When the reset circuit 94 does not receive the reset signal in step S1, it is determined whether the built-in timer of the reset circuit 94 is counting (step S7). When the built-in timer of the reset circuit 94 is not counting, the control of the step S7 is repeated.

In step S2, when the built-in timer of the reset circuit 94 is counting, the reset in the first CPU 91, the second CPU 92, and the third CPU 93 is released (step S8). Next, the control of step S1 or less is repeated.

The reset control in the control device 9 of the reheating hot water heater 1 for dual heating according to the present embodiment will be described with reference to FIGS. 1 to 3 as follows.

When the power-on signal is input or the reset signal is input from the reset circuit 94 by the reset button, the reset circuit 94 resets the input terminal of the second CPU 92 through the transmission wiring 94a. The reset signal is output to the reset input terminal 93a of the 92a and the third CPU 93. The reset circuit 94 outputs to the second CPU 92 and the third CPU 93 only a predetermined time by a timer incorporating the reset signal.

When the reset signal is inputted through the reset input terminal 92a, the second CPU 92 resets the heating proportional valve 7g and the heating blower 33. In other words, the heating gas proportional valve 7g and the heating blower 93 are turned off by the second CPU 92.

When the reset signal is received via the reset input terminal 93g, the third CPU 13 resets the hot water supply controller 20. FIG.

That is, the third CPU 93 supplies the hot water sparker 2a, the governor type water flow control valve 4b, the bypass control valve 4c, the hot water supply solenoid valve 7c, and the hot water supply switching valve 7d. And the hot water blower 23 is turned off.

After the reset control, the second CPU 92 passes through the reset output terminal 92b to the reset input terminal 91a of the first CPU 91 via the transmission wiring 92c and the NOT circuit 92d. Output the reset signal.

When the reset signal is received through the reset input terminal 91a, the first CPU 91 resets the heating controller 30. FIG. That is, the first CPU 91 allows the heating sparker 3a, the replenishment water solenoid valve 4j, the hot water solenoid valve 4b, the electric three way valve 4i, the bath circulation pump 5c, and the heating circulation pump ( 6a), the solenoid valve 6c for bath, the solenoid valve 7e for heating, and the solenoid valve 7f for heating are turned off.

Therefore, fuel gas and combustion air do not flow into the hot water combustor 2 and the heating combustor 3 when the reset button is set on the reset side during the start of energization or during energization. In addition, since there is no water supply in the hot water heat exchanger 24, the heat exchanger 34 for heating, and the heat exchanger 51 for bathing, the built-in timer of the reset circuit 94 Do not do it.

Therefore, when the reset button is set to the reset side at the start of energization or during energization, the control device 9 having a very high stability can be provided because the reset button is reset to the side where the fuel gas is not supplied.

In addition, since the second CPU 92, the third CPU 3, and the reset circuit 94 are electrically connected by direct transmission wiring, the second CPU 92 and the third CPU 93 are directly reset circuits ( 94, a reset signal is input. However, the first CPU 91 is always monitored for the control state by the second CPU 92, and the reset signal is sent from the second CPU 92 when the control state is determined to be a failure. The first CPU 91 is electrically connected through the reset circuit 94 and the second CPU 92, and a reset signal is inputted to the second CPU 92 at the start of energization so that the second CPU 92 is reset. Next, the reset signal is sent from the second CPU 92 to the first CPU 91.

Therefore, in the first CPU 91, the reset of the first CPU 91 is performed by inputting both reset signals between the reset at the time of failure and the reset at the start of energization by one kind of transmission wiring 92c. The number of parts can be reduced by reducing the number of parts by making common the input wiring 91a and the transmission wiring through which the reset signal is sent.

Therefore, a drastic improvement can be achieved as compared with the related art, and parts management such as transmission wiring can be easily performed due to the reduction of the number of parts.

In another embodiment, the present invention employs a control device for a reheating and hot water supply unit for heating, but for example, a control unit for a hot air blower that controls an electric heater in a first CPU and a blower in a second CPU, or controls a water heater alone. As long as it is a control device having a plurality of control circuits, such as a device or a control unit of a heater alone, it may be employed as a control device for a plurality of control circuits. It may be many.

In the present embodiment, when the reset signal is input, only the first CPU outputs the reset signal. However, when the reset signal is input, it is assumed that the third CPU can be reset to the second CPU as the first CPU. The reset signal may be output from the second CPU to the first CPU and the third CPU.

Claims (1)

A first CPU 91 operating according to a control procedure when electrically energized and transmitting / receiving predetermined data with the second CPU 92 and then reset when a reset signal is input from the second CPU 92; When the first time timer 90a is provided and electrically energized, the operation is performed according to the control procedure. When the reset signal is input from the reset circuit 94, the reset circuit 94 resets itself and resets the first CPU 91. A second CPU 92 for outputting a signal, and a reset circuit 94 for outputting a reset signal to the second CPU 92; a reset output terminal 92b of the second CPU 92; Is connected to the reset signal input terminal 91a of the first CPU 91 through the transmission line 92c and the NOT circuit 92d to make the reset signal input terminal 91a and the reset signal transmission line 92c common. A control device for a plurality of control circuits, characterized in that.

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