JPH07113520A - Burning amount controller - Google Patents

Abstract

PURPOSE:To make mechanical adjustment unnecessary in manufacturing a burning amount controller by a method wherein the memory signal of a flame signal memory unit is compared with a signal from a flame sensor to judge and an operating signal is outputted to a fuel supply changing device based on the result of judgment. CONSTITUTION:A flame signal (electric signal) is outputted from a flame sensor 26 in accordance with the burning amount of fuel, burnt by a burner 25. The flame signal is sent into a control unit 32 and is stored into the flame signal memory unit 27 of the control unit 32 by operating the switch of flame signal memory commanding unit 28 of the control unit 32. The flame signal comparing and deciding unit 29 of the control unit 32 compares the memory signal of the flame signal memory unit 27 with the flame signal from the flame sensor 26 to judge whether the burning amount is normal or not. The operating signal outputting unit 30 of the control unit 32 outputs an operating signal to a fuel supply changing device 24 based on the result of decision whereby the fuel supply changing device 24 is controlled by the operating signal so as not to be deviated from the range of minimum-maximum burning amount. According to this method, mechanical adjustment can be made unnecessary in manufacturing the controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion amount control device for electrically adjusting the combustion flow rate.

[0002]

2. Description of the Related Art Conventionally, a combustion amount control device of this type is shown in FIG.
There was something like that. (For example, JP-A-56-1
47974 and JP-A-56-147975) FIG. 5 is a schematic configuration diagram of a conventional combustion amount control device, which includes a gas supply source 1 such as a city gas pipe, an LP and a gas cylinder, a stop valve 2 and a gas governor 3. After that, the solenoid 5 is used as an actuator to drive the plunger 5 and the valve body 6 by the exciting current of the electromagnetic coil 4 to change the gap between the valve seat 7 and the valve body 6 to adjust the gas flow rate. In a device for controlling a combustion amount to be burned by a burner 9 via a valve 8, a valve body 10 of a proportional control valve 8 is provided with a valve body 10 from a side facing a plunger 5 in order to regulate a minimum gas flow rate according to a gas type. An adjusting mechanism 13 including a rod 11 in contact with the top of the rod 6 and an adjusting screw 12 for adjusting the effective length of the rod 11 is provided. In this conventional combustion amount control apparatus, when the proportional control valve 8 does not energize the electromagnetic coil 4, the force of the spring 14 urges the valve body 6 in the direction of abutting the valve seat 7, but the rod 11 First, the valve body 6 is brought into contact with the valve body 6 to regulate the operation of the valve body 6, and acts to maintain a gap corresponding to the minimum flow rate between the valve body 6 and the valve seat 7. Therefore, the valve body 6 does not close the valve seat 7. Therefore, the gas is closed by the shutoff valve 2 provided separately from the proportional control valve 8. Note that this conventional example is a gas water heater, and a desired water temperature that is a target value is input and instructed by the setting mechanism 15, and a water temperature signal from the water temperature detector 17 on the outlet side of the heat exchanger 16 is adjusted. It is fed back to the unit 18, the comparison unit 19 and the determination unit 20 of the adjustment unit 18 perform a comparison calculation, and the flow rate operation signal is output to the proportional control valve 8.

In this conventional combustion amount control device, when the shutoff valve 2 is opened, even if no current flows through the electromagnetic coil 4 of the proportional control valve 8, the minimum gas flow rate passes through the gap between the valve seat 7 and the valve body 6. Is flowing and burning in the burner 9. When the hot water temperature detected by the hot water temperature detector 17 is lower than the set value, the controller 18 outputs a control current, which is an operation signal, according to the difference between the set value and the detected value in order to increase the gas flow rate. The electromagnetic coil 4 is excited by this control current, the plunger 5 is attracted into the coil, the spring 14 is compressed, and the valve body 6 is displaced to a position where the force of repulsion and the attraction force of the solenoid are balanced and the valve seat 7 is formed. And the gas flow rate increases.

When the gas flow rate increases, the hot water temperature rises, and when the difference from the set value decreases, the control current decreases, and the repulsive force of the spring 14 increases with respect to the attraction force of the solenoid. The valve body 6 is displaced to the position where it is balanced with the suction force of the solenoid again, and the gap with the valve seat 7 is reduced. Further, for gas species having different calorific values of fuel gas and supply pressure, the range of the control current of the proportional control valve 8 is switched by the switching mechanism 21, and in some cases, the valve body 6 and the valve seat 7 are controlled to have appropriate diameters. Exchange for something.

That is, in this conventional combustion flow rate control device, the adjusting screw 12 of the adjusting mechanism 13 is used to regulate the minimum gas flow rate at which the burner 9 stably burns without being blown out by the influence of wind. The mechanical adjustment of the gap between the valve body 6 and the valve seat 7 is performed by switching the range of the control current of the control circuit by the change-over switch of the change-over mechanism 13 for the gas species groups having different heat generation amounts and supply pressures. The maximum gas flow rate is also regulated.

[0006]

However, the above conventional configuration has the following problems.

For example, as described above, the adjusting screw 12 of the adjusting mechanism 13 is used to regulate the minimum gas flow rate at which the burner 9 stably burns without being blown out by the influence of wind.
Mechanical adjustment work such as individually adjusting the gap between the valve body 6 and the valve seat 7 is required, and after the adjustment, the lock nut is tightened so as not to shift and the work is troublesome, and it takes a lot of man-hours. There was a problem.

Further, for example, even if the minimum gap between the valve body 6 and the valve seat 7 can be made constant when the supply gas pressure fluctuates, the fluctuation of the minimum gas flow rate cannot be prevented, so the governor 3 is indispensable,
I could not omit it even if I wanted to make it simple.

Further, as is well known, the structure in which the gap between the valve body 6 and the valve seat 7 is controlled by controlling the current of the solenoid actuator to control the gas flow rate is a force generated in the plunger 5 with respect to the current of the electromagnetic coil 4. Since the displacement of the valve body 6 causes a relatively large hysteresis and the characteristics vary greatly, it is difficult to accurately control the combustion amount in practice, and it cannot be used for, for example, the thermal power control by the open control of the gas table. It was a thing.

Moreover, since the combustion amount cannot be detected even if the hot water temperature is fed back, it is difficult to accurately set and control the combustion amount with small resolution and reproducibility.

When the gas type is changed, the range of the control current of the proportional control valve 8 is changed by the change-over switch of the change-over mechanism 21, and the valve element 6 and the valve seat 7 are exchanged with those having appropriate diameters in some cases. However, since the flow rate characteristic variation with respect to the control current of the proportional control valve 8 is large, it is actually difficult to manage the characteristic of the proportional control valve 8, and not only the switching of the switching mechanism 21 but also the control circuit at the time of gas type conversion. The current adjustment work was required. Moreover, in order to regulate the minimum gas flow rate, it is necessary to individually mechanically adjust the gap between the valve body 6 and the valve seat 7 by the adjusting screw 12 of the adjusting mechanism 13.

Further, the proportional control valve 8 does not have a closing function and requires the closing valve 2 separately. For example, if the proportional control valve 8 needs a double closing function for safety reasons, another closing valve must be attached. However, there are drawbacks such as a problem in terms of downsizing of equipment and man-hours for assembly.

The present invention solves the above-mentioned conventional problems, and it is a first object of the present invention to provide a combustion amount control device which does not require mechanical adjustment during manufacturing.

A second object of the present invention is to provide a combustion amount control device capable of restricting and controlling the minimum flow rate without mechanical adjustment during manufacturing and during gas type conversion.

A third object of the present invention is to provide a combustion amount control device which can eliminate the need for a governor.

A fourth object of the present invention is to provide a combustion amount control device capable of conversion work without mechanical adjustment by simply switching a switch or the like when converting gas species.

A fifth object of the present invention is to provide a combustion amount control device capable of accurately controlling the combustion amount with a small resolution.

A sixth object of the present invention is to provide a combustion amount control device capable of finely controlling the combustion amount from closed to fully opened by one valve.

[0019]

In order to achieve the above first object, a combustion amount control apparatus of the present invention is a fuel supply variable device having a fuel inlet and an outlet, and a fuel sent from the outlet. A burner that burns, a flame sensor that converts the flame of the burner into an electric signal, a flame signal storage unit that stores the signal of the flame sensor, and a storage instruction to the flame signal storage unit by a switch operation of the signal of the flame sensor. A flame signal storage instructing unit, a flame signal comparison / determination unit that compares and discriminates a storage signal of the flame signal storage unit and a signal from the flame sensor, and at least the fuel supply variable based on the determination result of the flame signal comparison / determination unit. An operation signal transmission unit for transmitting an operation signal to the device.

In order to achieve the second object, the combustion amount control device of the present invention is a fuel supply variable device having a fuel inlet and an outlet, a burner for burning the fuel sent from the outlet, and the burner. A flame sensor for converting the flame of the above into an electric signal, a minimum flame signal storage unit for storing at least the minimum flame signal of the flame sensor, and a storage unit for storing at least the minimum flame signal of the flame sensor in the minimum flame signal storage unit by a switch operation. A flame signal storage instructing section for instructing, a flame signal comparison / determination section for comparing and discriminating a storage signal of the minimum flame signal storage section and a signal from the flame sensor, and at least the fuel according to the determination result of the flame signal comparison / determination section. An operation signal transmission unit for transmitting an operation signal to the supply variable device.

In order to achieve the third object, the combustion amount control device of the present invention is a fuel supply variable device having a fuel inlet and an outlet, a burner for burning the fuel sent from the outlet, and the burner. A flame sensor for converting the flame of to an electric signal, and a minimum-maximum flame signal storage unit for storing at least the minimum flame signal and the maximum flame signal of the flame sensor,
A flame signal storage instruction unit for instructing to store at least the minimum flame signal and the maximum flame signal of the flame sensor in the minimum to maximum flame signal storage unit by switch operation, and the minimum to
A flame signal comparison / determination unit that compares and discriminates the stored signal of the maximum flame signal storage unit and the signal from the flame sensor, and an operation of sending an operation signal to the fuel supply variable device based on at least the determination result of the flame signal comparison / determination unit. And a signal transmission unit.

In order to achieve the fourth object, the combustion amount control device of the present invention is a fuel supply variable device having a gas inlet and an outlet, a burner for burning the gas sent from the outlet, and the burner. Flame sensor for converting the flame of the above into an electric signal, a type flame signal storage unit for storing at least the minimum flame signal and the maximum flame signal of the flame sensor for each gas species group, and at least the minimum flame signal and the maximum flame of the flame sensor A signal from the flame signal storage instruction unit for instructing to store a signal in the type flame signal storage unit by operating a switch for each gas type group, a gas type group changeover switch, a storage signal of the type flame signal storage unit, and a signal from the flame sensor. And a flame signal comparison / discrimination unit for comparing and discriminating between the fuel supply variable device and at least the discrimination result of the flame signal comparison / discrimination unit. It is obtained by an operation signal generating portion for sending a signal.

In order to achieve the fifth object, a combustion amount control device of the present invention is a valve seat provided between an inlet and an outlet, a valve body provided opposite to the valve seat, and the valve body. A variable fuel supply device including a stepping motor for driving the burner, a burner that burns the fuel sent from the outlet, a flame sensor that converts the flame of the burner into an electric signal, and a flame that stores the signal of the flame sensor. A signal storage unit, a flame signal storage instruction unit that instructs the flame signal storage unit to store the signal of the flame sensor by a switch operation, and a storage signal of the flame signal storage unit and a signal from the flame sensor are compared and determined. A flame signal comparison / determination unit and at least an operation signal transmission unit that transmits an operation signal to the fuel supply variable device according to the determination result of the flame signal comparison / determination unit.

Further, in order to achieve the sixth object, the combustion amount control apparatus of the present invention comprises: a valve body having a valve seat between an inlet and an outlet; a valve body provided so as to face the valve seat; A closing spring that urges the valve seat in a direction in which the valve body closes; and a stepping motor that drives the valve shaft against the closing spring,
A fuel supply variable device including a position sensor that detects the stepping motor position where the valve element surely closes a valve seat, and a burner that burns fuel sent from the outlet.
A flame sensor that converts the flame of the burner into an electric signal,
A flame signal storage unit that stores the signal of the flame sensor, a flame signal storage instruction unit that instructs the flame signal storage unit to store the signal of the flame sensor by a switch operation, a storage signal of the flame signal storage unit, and the flame. A flame signal comparison / discrimination unit for comparing and discriminating a signal from a sensor, and an operation signal transmitting unit for transmitting an operation signal to at least the fuel supply variable device according to the discrimination result of the flame signal comparison / discrimination unit are provided.

[0025]

With the above-described structure, the combustion amount control device of the present invention burns the fuel sent to the burner through the variable fuel supply device, and burns the fuel with the burner and generates an electric power according to the size of the flame burned by the burner. The flame sensor converts into a signal. That is, a flame signal is emitted from the flame sensor according to the amount of combustion. The flame signal is sent to the control unit, and the flame signal is stored in the flame signal storage unit of the control unit by operating the switch of the flame signal storage instruction unit provided in the control unit. For example, when the switch of the flame signal storage instruction unit is operated when the combustion amount of the thermal power is 1, the flame signal of the combustion amount of the thermal power 1 is stored, and when the switch of the flame signal storage instruction unit is operated when the combustion amount of the thermal power 2 is operated, the thermal power is increased. A flame signal with a combustion quantity of 2 is stored. Similarly, if the switch of the flame signal storage instruction section is operated when the combustion amount of the heat power 5 is reached, the flame signal of the combustion amount of the heat power 5 is stored. In the state where the flame signals of the combustion amounts of the thermal powers 1 to 5 are stored as described above, for example, when the thermal power instruction unit of the control unit instructs to set the thermal power 3, the control unit receives the flame signal from the flame sensor. However, the flame signal comparison / determination unit of the control unit compares the stored signal of the flame signal storage unit with the signal from the flame sensor, and operates so as to obtain the flame signal corresponding to the already stored combustion amount of the thermal power 3. The signal sending unit sends an operation signal to the variable fuel supply device so as to maintain the state of the combustion amount of the thermal power 3.

Further, according to the combustion amount control device of the present invention, the fuel sent to the burner via the variable fuel supply device is burned by the burner and is in accordance with the size of the flame burned by the burner. The flame sensor converts into an electrical signal. That is, a flame signal is emitted from the flame sensor according to the amount of combustion. The flame signal is sent to the control unit, and the flame signal is stored in the minimum flame signal storage unit of the control unit by operating the switch of the flame signal storage instruction unit provided in the control unit. For example, when the switch of the flame signal storage instruction section is operated at the minimum combustion amount, the flame signal of the minimum combustion amount is stored. In the state where the flame signal of the minimum combustion amount is stored in this way, for example, when controlling the combustion amount while feeding back the temperature of the non-heating object, while the control unit receives the flame signal from the flame sensor, The flame signal comparison / determination unit compares the signal from the flame sensor with the signal stored in the minimum flame signal storage unit, so as not to burn with a combustion amount less than the flame signal corresponding to the minimum combustion amount already stored, The operation signal sending section acts to send an operation signal to the variable fuel supply device.

Further, according to the combustion amount control device of the present invention, the fuel sent to the burner through the variable fuel supply device is burned by the burner and is dependent on the size of the flame burned by the burner. The flame sensor converts into an electrical signal. That is, a flame signal is emitted from the flame sensor according to the amount of combustion. The flame signal is sent to the control unit, and the flame signal is stored in the minimum to maximum flame signal storage unit of the control unit by operating the switch of the flame signal storage instruction unit provided in the control unit. For example, when the switch of the flame signal storage instruction unit is operated at the minimum combustion amount, the flame signal of the minimum combustion amount is stored, and when the switch of the flame signal storage instruction unit is operated at the maximum combustion amount, the flame signal of the maximum combustion amount is obtained. Remembered. In the state where the flame signals of the minimum and maximum combustion amounts are stored in this way, for example, when controlling the combustion amount while feeding back the temperature of the non-heating object, the control unit receives the flame signal from the flame sensor while controlling it. The flame signal comparison / discrimination unit of the section compares the stored signal of the minimum to maximum flame signal storage unit with the signal from the flame sensor, and does not deviate from the range of the flame signal corresponding to the already stored minimum combustion amount and maximum combustion amount. As described above, the operation signal sending portion acts to send the operation signal to the fuel supply variable device. Therefore,
Even if the fuel supply pressure fluctuates,
The fuel supply variable device is controlled so as not to deviate from the maximum combustion amount range.

Further, according to the combustion amount control device of the present invention, the gas sent to the burner through the variable fuel supply device is burned by the burner and is dependent on the size of the flame burned by the burner. The flame sensor converts into an electrical signal. That is, a flame signal is emitted from the flame sensor according to the amount of gas burned. The flame signal is sent to the control unit, and the flame signal is stored in the type flame signal storage unit of the control unit by operating the switch of the flame signal storage instruction unit provided in the control unit. For example, if you set the gas type group changeover switch to the applicable gas type group and operate the switch of the flame signal storage indicator when the combustion amount is the minimum, the flame signal of the minimum combustion amount of that gas type is stored, and the maximum combustion amount When the switch of the flame signal storage instruction section is operated, the flame signal of the maximum combustion amount is stored. In this way, for example, when controlling the combustion amount while feeding back the temperature of the non-heating object, with the switching switch switched to the gas type group that stores the flame signals of the minimum and maximum combustion amounts of each gas type, the flame sensor While the control unit receives the flame signal from the control unit, the flame signal comparison / determination unit of the control unit compares the stored signal of the gas type flame signal storage unit with the signal from the flame sensor, and the already stored gas type group. The operation signal sending portion acts to send the operation signal to the fuel supply variable device so as not to deviate from the range of the flame signal corresponding to the minimum combustion amount and the maximum combustion amount of. Therefore, even if the gas pressure of the gas supply source fluctuates, the fuel supply variable device is controlled so as not to deviate from the minimum to maximum combustion amount range.

Further, the combustion amount control device of the present invention has the above-mentioned structure, and the burner is provided through the fuel supply variable device including the stepping motor for driving the valve element provided facing the valve seat provided between the inlet and the outlet. The fuel sent to the burner burns in the burner and is converted by the flame sensor into an electric signal according to the size of the flame burning in the burner. That is, a flame signal is emitted from the flame sensor according to the amount of combustion. The flame signal is sent to the control unit, and the flame signal is stored in the flame signal storage unit of the control unit by operating the switch of the flame signal storage instruction unit provided in the control unit. For example, when the switch of the flame signal storage instruction unit is operated when the combustion amount of the thermal power is 1, the flame signal of the combustion amount of the thermal power 1 is stored, and when the switch of the flame signal storage instruction unit is operated when the combustion amount of the thermal power 2 is operated, the thermal power is increased. A flame signal with a combustion quantity of 2 is stored.
Similarly, if the switch of the flame signal storage instruction section is operated when the combustion amount of the heat power 5 is reached, the flame signal of the combustion amount of the heat power 5 is stored. In this manner, with the flame signals of the combustion amounts of the thermal power 1 to thermal power 5 being stored, for example, the thermal power of the control unit may be set to the thermal power 3
When the setting instruction is given, while the control unit receives the flame signal from the flame sensor, the flame signal comparison / determination unit of the control unit compares the stored signal of the flame signal storage unit with the signal from the flame sensor and stores the already stored signal. The operation signal sending unit sends an operation signal to the stepping motor of the fuel supply variable device so that a flame signal corresponding to the combustion amount of the generated heat power 3 is obtained, and the state of the combustion amount of the heat power 3 is accurately maintained with fine resolution. Acts like.

Further, the combustion amount control apparatus of the present invention has the above-mentioned structure, and the valve seat provided between the inlet and the outlet resists the force of the closing spring for urging the valve seat in the direction of closing the valve. The fuel sent to the burner via the fuel supply variable device that consists of a stepping motor that drives the valve shaft in the body opening direction burns in the burner and becomes an electric signal according to the size of the flame burned in the burner. The flame sensor converts. That is, a flame signal is emitted from the flame sensor according to the amount of combustion.
The flame signal is sent to the control unit, and the flame signal is stored in the flame signal storage unit of the control unit by operating the switch of the flame signal storage instruction unit provided in the control unit.

For example, when the switch of the flame signal storage instruction section is operated when the combustion amount of the thermal power is 1, the flame signal of the combustion amount of the thermal power 1 is stored, and when the combustion amount of the thermal power is 2, the switch of the flame signal storage instruction section is operated. Then, the flame signal of the combustion amount of the thermal power 2 is stored. Similarly, if the switch of the flame signal storage instruction section is operated when the combustion amount of the heat power 5 is reached, the flame signal of the combustion amount of the heat power 5 is stored. In the state where the flame signals of the combustion amounts of the thermal powers 1 to 5 are stored as described above, for example, when the thermal power instruction unit of the control unit instructs to set the thermal power 3, the control unit receives the flame signal from the flame sensor. However, the flame signal comparison / determination unit of the control unit compares the stored signal of the flame signal storage unit with the signal from the flame sensor, and operates so as to obtain the flame signal corresponding to the already stored combustion amount of the thermal power 3. The signal sending unit sends an operation signal to the stepping motor of the variable fuel supply device to act so as to accurately maintain the state of the combustion amount of the thermal power 3 with a fine resolution. Furthermore, the position sensor can detect the position of the stepping motor at which the valve body can close the valve seat securely, and the applied pulse to the stepping motor from the closed position to a predetermined thermal power can be quantitatively and highly accurately reproduced. In addition, the thermal power can be controlled accurately, quickly and with good reproducibility, and the single valve device can close or fully open to finely control the combustion flow rate.

[0032]

Embodiments of the present invention will be described below with reference to the drawings. First, in FIG. 1, a fuel supply variable device 24 having a fuel inlet 22 and an outlet 23, a burner 25 for burning the fuel sent from the outlet 23, a flame sensor 26 for converting the flame of the burner 25 into an electric signal, A flame signal storage unit 27 that stores the signal of the flame sensor 26, a flame signal storage instruction unit 28 that instructs the flame signal storage unit 27 to store the signal of the flame sensor 26 by a switch operation, and a storage signal of the flame signal storage unit 27. A flame signal comparison / discrimination unit 29 for comparing and discriminating the signal from the flame sensor 26, and an operation signal transmitting unit 30 for transmitting an operation signal to at least the fuel supply variable device 24 based on the discrimination result of the flame signal comparison / determination unit 29 are provided. It is a composition.

Next, the operation and operation of the above embodiment will be described. First, the burner 25 is fed through the variable fuel supply device 24.
The fuel sent to is burned by the burner 25 and is converted by the flame sensor 26 into an electric signal according to the size of the flame 31 burned by the burner 25. That is, a flame signal is emitted from the flame sensor 26 according to the amount of combustion. The flame signal is sent to the control unit 32, and the flame signal is transmitted to the control unit 32 by operating the switch 33 (not shown) of the flame signal storage instruction unit 28 provided in the control unit 32.
It is stored in the flame signal storage unit 27.

For example, when the switch 33 of the flame signal storage instruction unit 28 is operated when the combustion amount of the thermal power 1 is set, the flame signal of the combustion amount of the thermal power 1 is stored, and when the combustion amount of the thermal power 2 is set, the flame signal storage instruction unit 28 is set. When the switch is operated, the flame signal of the combustion amount of the thermal power 2 is stored. Similarly, when the switch of the flame signal storage instruction unit 28 is operated when the combustion amount of the heat power 5 is reached, the flame signal of the combustion amount of the heat power 5 is stored. In the state where the flame signals of the combustion amounts of the thermal powers 1 to 5 are stored in this manner, for example, when the thermal power instruction unit 34 (not shown) of the control unit 32 instructs to set the thermal power 3, the flame sensor 26 outputs While the control unit 32 receives the flame signal, the flame signal comparison / determination unit 29 of the control unit 32 compares the stored signal of the flame signal storage unit 27 with the signal from the flame sensor 26, and the already stored thermal power 3 is stored. The operation signal sending unit 30 sends an operation signal to the fuel supply variable device 24 so that the flame signal corresponds to the combustion amount, and acts to maintain the state of the combustion amount of the thermal power 3.

Conventionally, at the time of manufacturing, mechanical adjustment work such as individually adjusting the clearance between the valve body 6 and the valve seat 7 by the adjusting screw 12 of the adjusting mechanism 13 of the proportional control valve 8 is required, After the adjustment, the work of tightening the lock nut so as not to shift and adjusting the control gain with the knob of the variable resistor of the control unit 18 in order to cover the variation in the gain of the flow rate characteristic of the proportional control valve 8 are performed. It required time-consuming work.

On the other hand, in the present embodiment, the heat power to be stored, that is, the combustion amount is set to, for example, the fuel supply variable device 2.
While monitoring the nozzle pressure of the burner nozzle 35 while varying the combustion amount in 4, while pressing the button switch of the flame signal storage instruction unit 28 when the predetermined pressure is reached,
Since the flame signal from the flame sensor 26 at the predetermined thermal power is stored in the flame signal storage unit 27, the stored thermal power can be stored at any time regardless of variations in characteristics of the fuel supply variable device 24 and the flame sensor 26. It can be reproduced.

That is, at the time of manufacturing, the flame signal storage instruction unit 28
It is possible to realize a combustion amount control device that does not require mechanical adjustment work that only requires the operation of the switch.

Therefore, it is possible to roughly manage the characteristic variation of the functional parts such as the fuel supply variable device 24 and the flame sensor 26, simplify the manufacturing work, and reduce the man-hours.

FIG. 2 shows a second embodiment. The combustion amount control apparatus of the embodiment of FIG. 2 sends a fuel supply variable device 24 having a fuel inlet 22 and an outlet 23, a burner 25 for burning the fuel sent from the outlet 23, and a flame 31 of the burner 25 with an electric signal. And a minimum flame signal storage unit 3 that stores at least the minimum flame signal of the flame sensor 26.
6, a flame signal storage instruction unit 28 for instructing to store at least the minimum flame signal of the flame sensor 26 in the minimum flame signal storage unit 36 by a switch operation, a storage signal of the minimum flame signal storage unit 36, and a signal from the flame sensor 26. A flame signal comparison / discrimination unit 29 for comparing and discriminating between the fuel supply variable device 24 and an operation signal transmission unit 30 for transmitting an operation signal to the fuel supply variable device 24 based on the discrimination result of the flame signal comparison / discrimination unit 29.

Next, the operation and operation of the above embodiment will be described. First, the burner 25 is fed through the variable fuel supply device 24.
The fuel sent to is burned by the burner 25 and is converted by the flame sensor 26 into an electric signal according to the size of the flame 31 burned by the burner 25. That is, a flame signal is emitted from the flame sensor 26 according to the amount of combustion. The flame signal is sent to the control unit 32, and the flame signal is transmitted to the control unit 32 by operating the switch 33 (not shown) of the flame signal storage instruction unit 28 provided in the control unit 32.
It is stored in the minimum flame signal storage unit 36.

For example, when the switch 33 of the flame signal storage instruction unit 28 is operated at the minimum combustion amount, the flame signal of the minimum combustion amount is stored. When controlling the combustion amount while feeding back the temperature of the non-heated object in the state where the flame signal of the minimum combustion amount is stored in this way, the control is performed while the control unit 32 receives the flame signal from the flame sensor 26. Part 32
The flame signal comparison / discrimination unit 29 may compare the stored signal of the minimum flame signal storage unit 36 with the signal from the flame sensor 26, and burn with a combustion amount smaller than the flame signal corresponding to the already stored minimum combustion amount. The operation signal sending unit 30 acts so as to send an operation signal to the fuel supply variable device 24 so as not to operate.

Conventionally, at the time of manufacturing or gas type conversion, for example, the burner 9 regulates the minimum gas flow rate for stable combustion without causing blowout by the influence of the wind and the like, so as to regulate the minimum gas flow rate. The adjustment screw 12 of 13 requires a mechanical adjustment work such as individually adjusting the gap between the valve body 6 and the valve seat 7, and the lock nut is tightened so as not to shift after the adjustment. It required a lot of work.

On the other hand, in the present embodiment, the minimum thermal power to be stored, that is, the minimum combustion amount is controlled to a predetermined minimum while monitoring the nozzle pressure of the burner nozzle 35 while varying the combustion amount with the fuel supply variable device 24. If the button switch of the flame signal storage instruction unit 28 is pressed when the pressure is reached, the flame sensor 26 at the predetermined minimum heat power
Since the minimum flame signal from the engine is stored in the minimum flame signal storage unit 36, for example, the fuel supply variable device 24 and the flame sensor 26
It is possible to detect the stored minimum combustion state regardless of the variation in the characteristics.

That is, the combustion amount control device capable of controlling the minimum combustion amount without performing any mechanical adjustment work by only the operation of operating the switch of the flame signal storage instructing section 28 at the time of manufacturing and gas type conversion. Can be realized.

Therefore, the characteristic variation of the functional parts such as the fuel supply variable device 24 and the flame sensor 26 can be roughly controlled, the work at the time of manufacturing and gas type conversion can be simplified, and the burner can be prevented from misfiring. It is possible to realize a simple combustion amount control device.

FIG. 3 shows a third embodiment. The combustion amount control apparatus of the embodiment of FIG. 3 sends an electric signal to a fuel supply variable device 24 having a fuel inlet 22 and an outlet 23, a burner 25 for burning the fuel sent from the outlet 23, and a flame 31 of the burner 25. The flame sensor 26 for converting into a minimum, the minimum-maximum flame signal storage unit 37 for storing at least the minimum flame signal and the maximum flame signal of the flame sensor 26, and at least the minimum flame signal and the maximum flame signal of the flame sensor 26 by switching operation. ~ Flame signal storage instruction unit 28 for instructing the maximum flame signal storage unit 37 to store, and minimum to maximum flame signal storage unit 3
7 and the signal from the flame sensor 26 are compared to determine a flame signal comparison / determination unit 29, and at least an operation signal transmission unit that transmits an operation signal to the fuel supply variable device 24 based on the determination result of the flame signal comparison / determination unit 29. 30 is provided.

Next, the operation and operation of the above embodiment will be described. First, the burner 25 is fed through the variable fuel supply device 24.
The fuel sent to is burned by the burner 25 and is converted by the flame sensor 26 into an electric signal according to the size of the flame 31 burned by the burner 25. That is, a flame signal is emitted from the flame sensor 26 according to the amount of combustion. The flame signal is sent to the control unit 32, and the flame signal is transmitted to the control unit 32 by operating the switch 33 (not shown) of the flame signal storage instruction unit 28 provided in the control unit 32.
Is stored in the minimum to maximum flame signal storage unit 37. For example, when the combustion amount is the minimum, the switch 3 of the flame signal storage instruction unit 28
When 3 is operated, the flame signal of the minimum combustion amount is stored, and when the maximum combustion amount is reached, the switch 3 of the flame signal storage instruction unit 28 is stored.
If 3 is operated, the flame signal of the maximum combustion amount is stored. In the state where the flame signals of the minimum and maximum combustion amounts are stored in this way, for example, when controlling the combustion amount while feeding back the temperature of the non-heated material, while the control unit 32 receives the flame signal from the flame sensor 26, The flame signal comparison / discrimination unit 29 of the control unit 32 compares the storage signal of the minimum to maximum flame signal storage unit 37 with the signal from the flame sensor 26, and flames corresponding to the already stored minimum combustion amount and maximum combustion amount. The operation signal sending unit 30 acts to send the operation signal to the fuel supply variable device 24 so as not to deviate from the signal range. Therefore, even if the pressure of the fuel supply source fluctuates, the fuel supply variable device 24 is controlled so as not to deviate from the minimum to maximum combustion amount range.

Conventionally, even if the minimum gap between the valve body 6 and the valve seat 7 can be made constant when the supply gas pressure fluctuates, the governor 3 is indispensable because the fluctuation of the minimum gas flow rate cannot be prevented. I could not omit it even if I wanted to.

On the other hand, in this embodiment, the minimum
Since the maximum flame signal storage unit 37 can store the flame signals of the minimum and maximum combustion amounts and the control unit 32 receives the flame signal from the flame sensor 26, the fuel supply variable device 24 is controlled. Even if the pressure fluctuates, the combustion amount can be controlled so as not to deviate from the minimum combustion amount and the maximum combustion amount.

Therefore, the governor 3 for stabilizing the fuel supply pressure can be eliminated, and the structure of the combustion amount control device can be simplified.

FIG. 4 shows a fourth embodiment. The combustion amount control apparatus of the embodiment of FIG. 4 uses a fuel supply variable device 24 having a gas inlet 22 and an outlet 23, a burner 25 for burning the gas sent from the outlet 23, and a flame 31 of the burner 25 as an electric signal. A flame sensor 26 for converting into a flame sensor 26, a type flame signal storage unit 38 that stores at least the minimum flame signal and the maximum flame signal of the flame sensor 26 for each gas type group, and at least the minimum flame signal and the maximum flame signal of the flame sensor 26 as a gas. A flame signal storage instruction unit 28 for instructing the type flame signal storage unit 38 to perform a switch operation for each type group, a gas type group changeover switch 39, a storage signal of the type flame signal storage unit 38, and a signal from the flame sensor 26. The fuel supply variable device 24 based on the determination result of the flame signal comparison / determination unit 29 for comparing and determining Operation signal is a configuration in which an operation signal sending unit 30 for sending the.

Next, the operation and operation of the above embodiment will be described. First, the burner 25 is fed through the variable fuel supply device 24.
The gas sent to the burner 25 is burned by the burner 25 and is converted by the flame sensor 26 into an electric signal corresponding to the size of the flame 31 burned by the burner 25. That is, a flame signal is emitted from the flame sensor 26 according to the combustion amount of gas. The flame signal is sent to the control unit 32, and by operating a switch 33 (not shown) of the flame signal storage instruction unit 28 provided in the control unit 32, the flame signal is changed to the type flame of the control unit 32. It is stored in the signal storage unit 38. For example, when the gas type group changeover switch 39 is set to an applicable gas type group and the switch 33 of the flame signal storage instruction unit 28 is operated at the time of the minimum combustion amount, the flame signal of the minimum combustion amount of the gas type is stored, and the maximum is also stored. When the switch 33 of the flame signal storage instruction unit 28 is operated at the time of the combustion amount, the flame signal of the maximum combustion amount is stored. In this way, for example, when controlling the combustion amount while feeding back the temperature of the non-heated object in a state in which the changeover switch 39 is changed over to store the flame signals of the minimum and maximum combustion amounts of each gas type, the flame is used. While the control unit 32 receives the flame signal from the sensor 26, the flame signal comparison / determination unit 29 of the control unit 32 compares the stored signal of the type flame signal storage unit 38 with the signal from the flame sensor 26, and stores them already. The operation signal sending unit 30 acts to send an operation signal to the fuel supply variable device 24 so as not to deviate from the range of the flame signal corresponding to the minimum combustion amount and the maximum combustion amount of the gas type group thus determined. Therefore, even if the gas pressure of the gas supply source fluctuates, the fuel supply variable device 24 is controlled so as not to deviate from the minimum to maximum combustion amount range.

Conventionally, for example, when changing the gas type, the range of the control current of the proportional control valve 8 is switched by the changeover switch of the changeover mechanism 21, and the valve body 6 and the valve seat 7 are exchanged with those having appropriate diameters as the case may be. However, since the flow rate characteristic variation with respect to the control current of the proportional control valve 8 is large, it is actually difficult to manage the characteristic of the proportional control valve 8, and not only the switching of the switching mechanism 21 but also the gas type conversion. At times, current adjustment work for the control circuit was required. Moreover, in order to regulate the minimum gas flow rate, the adjusting screw 12 of the adjusting mechanism 13
Therefore, it is also necessary to individually mechanically re-adjust the gap between the valve body 6 and the valve seat 7.

On the other hand, in the present embodiment, by simply switching to the gas type group using the changeover switch 39, the flame signal and the flame sensor 26 of the gas type group stored in the type flame signal storage section 38 are detected. Since the control unit 32 controls the fuel supply variable device 24 so as not to deviate from the combustion range of the minimum combustion amount and the maximum combustion amount of the gas type group while comparing with the flame signal of A simple and safe gas conversion can be realized without electric circuit adjustment and mechanical adjustment work.

A fifth embodiment will be described with reference to FIG. Fifth
In the combustion amount control device of the embodiment, the valve seat 40 provided between the inlet 22 and the outlet 23, and the valve body 4 provided facing the valve seat 40.
1, a fuel supply variable device 24 including a stepping motor 42 that drives the valve element 41, a burner 25 that burns the fuel sent from the outlet 23, and a flame sensor 26 that converts the flame 31 of the burner 25 into an electric signal. And the flame sensor 26
Flame signal storage unit 27 that stores the signal of
A flame signal storage instructing section 28 for instructing to store the signal No. 6 in the flame signal storage section 27 by a switch operation, and a flame signal comparison / determination section 29 for comparing and discriminating the storage signal in the flame signal storage section 27 and the signal from the flame sensor 26. And at least the discrimination result of the flame signal comparison / discrimination unit 29, the fuel supply variable device 24
And an operation signal transmitting section 30 for transmitting an operation signal.

Next, the operation and operation of the above embodiment will be described. First, the valve seat 40 provided between the inlet 22 and the outlet 23
The burner 2 via a fuel supply variable device 24 including a stepping motor 42 that drives a valve element 41 provided so as to face the burner 2
The fuel sent to No. 5 is burned by the burner 25, and the flame sensor 26 converts it into an electric signal corresponding to the size of the flame 31 burned by the burner 25. That is, a flame signal is emitted from the flame sensor 26 according to the amount of combustion. The flame signal is sent to the control unit 32, and the flame signal is transmitted to the control unit 32 by operating the switch 33 (not shown) of the flame signal storage instruction unit 28 provided in the control unit 32.
It is stored in the flame signal storage unit 27. For example, when the switch 33 of the flame signal storage instruction unit 28 is operated when the combustion amount of the thermal power 1 is set, the flame signal of the combustion amount of the thermal power 1 is stored, and when the switch 33 of the flame signal storage instruction unit 28 is set when the combustion amount of the thermal power 2 is set. If operated, the flame signal of the combustion amount of the thermal power 2 is stored. Similarly, when the combustion amount of the thermal power 5 is reached, the flame signal storage instruction unit 2
When the switch 33 of No. 8 is operated, the flame signal of the combustion amount of the thermal power 5 is stored. In the state where the flame signals of the combustion amounts of the thermal powers 1 to 5 are stored in this manner, for example, when the thermal power instruction unit 34 (not shown) of the control unit 32 instructs to set the thermal power 3, the flame sensor 26 outputs While the control unit 32 receives the flame signal, the flame signal comparison / determination unit 29 of the control unit 32 compares the stored signal of the flame signal storage unit 27 with the signal from the flame sensor 26, and the already stored thermal power 3 is stored. The operation signal sending unit 30 sends an operation signal to the stepping motor 42 of the fuel supply variable device 24 so that a flame signal corresponding to the combustion amount is obtained, so that the state of the combustion amount of the thermal power 3 is accurately maintained with fine resolution. To work.

Conventionally, for example, by controlling the current of a solenoid actuator, the gap between the valve body 6 and the valve seat 7 is adjusted to control the gas flow rate, and the force generated in the plunger 5 with respect to the current of the electromagnetic coil 4 and the valve Since the displacement of the body 6 causes a relatively large hysteresis and a large variation in characteristics, it is difficult to accurately control the combustion amount and cannot be used, for example, for thermal power control by open control of a gas table. there were. Moreover, since the combustion amount cannot be detected even if the hot water temperature is fed back, it is also difficult to set and control the combustion amount accurately and with good resolution.

On the other hand, in the present embodiment, the flame signal from the flame sensor 26 at a predetermined heat power can be stored in the flame signal storage unit 27, and the valve seat 40 and the valve body 41 are arranged.
Since the gap between and is controlled by the stepping motor 42 accurately and in small steps according to the applied pulse, it is possible to set and control the combustion amount accurately and with good reproducibility.

A sixth embodiment will be described with reference to FIG. Sixth
In the combustion amount control device of the embodiment of the above, the valve body 46 having the valve seat 40 between the inlet 22 and the outlet 23, the valve body 41 provided facing the valve seat 40, and the valve body 41 A closing spring 43 that urges in the closing direction, a stepping motor 42 that drives the valve shaft 44 against the closing spring 43, and a valve element 41.
For controlling the position of the stepping motor 42 that reliably closes the valve seat 40, a fuel supply variable device 24, a burner 25 for burning the fuel sent from the outlet 23, and a flame 31 of the burner 25. A flame sensor 26 for converting into an electric signal, a flame signal storage unit 27 for storing the signal of the flame sensor 26, and a flame signal storage instruction unit 28 for instructing the flame signal storage unit 27 to store the signal of the flame sensor 26 by a switch operation. A flame signal comparison / determination unit 29 that compares and discriminates the stored signal of the flame signal storage unit 27 with the signal from the flame sensor 26, and sends an operation signal to the fuel supply variable device 24 based on at least the discrimination result of the flame signal comparison / determination unit 29. The operation signal sending unit 30 is provided.

Next, the operation and operation of the above embodiment will be described. First, the valve seat 40 provided between the inlet 22 and the outlet 23
Through the fuel supply variable device 24 including the stepping motor 42 that drives the valve shaft 44 in the opening direction of the valve body 41 against the force of the closing spring 43 that urges the valve body 41 in the closing direction. The fuel sent to the burner 25 burns in the burner 25 and also burns in the burner 25.
The flame sensor 26 converts the electrical signal according to the magnitude of 1. That is, a flame signal is emitted from the flame sensor 26 according to the amount of combustion. The flame signal is sent to the control unit 32, and by operating the switch 33 (not shown) of the flame signal storage instruction unit 28 provided in the control unit 32, the flame signal is changed to the flame signal of the control unit 32. It is stored in the storage unit 27. For example, when the combustion amount of the thermal power is 1, the flame signal storage instruction unit 2
When the switch 33 of 8 is operated, the flame signal of the combustion amount of the thermal power 1 is stored, and when the switch 33 of the flame signal storage instruction unit 28 is operated at the time of the combustion amount of the thermal power 2, the flame signal of the combustion amount of the thermal power 2 is stored. To be done. Similarly, when the switch 33 of the flame signal storage instruction unit 28 is operated when the combustion amount of the heat power 5 is reached, the flame signal of the combustion amount of the heat power 5 is stored. In the state where the flame signals of the combustion amounts of the thermal powers 1 to 5 are stored in this manner, for example, when the thermal power instruction unit 34 (not shown) of the control unit 32 instructs to set the thermal power 3, the flame sensor 26 outputs While the control unit 32 receives the flame signal, the flame signal comparison / determination unit 29 of the control unit 32 compares the stored signal of the flame signal storage unit 27 with the signal from the flame sensor 26, and the already stored thermal power 3 is stored. The operation signal sending unit 30 sends an operation signal to the stepping motor 42 of the fuel supply variable device so that the flame signal corresponds to the combustion amount, and acts so as to accurately maintain the state of the combustion amount of the thermal power 3 with fine resolution. To do. Moreover, the position sensor 45 can detect the position of the stepping motor 42 at which the valve body 41 can reliably close the valve seat 40, and the applied pulse to the stepping motor 42 from the closed position to a predetermined thermal power is quantitative and high. It works so that it can be reproduced with accuracy, and can control the thermal power accurately, quickly and with good reproducibility, and also works so as to finely control the combustion flow rate from closed to fully opened with one valve device.

Since the sealing material between the valve shaft 44 and the valve body 46 is composed of the diaphragm 47, the valve shaft 44 must be slid by sealing with an O-ring, for example. In contrast, since there is no sliding friction, the force of the closing spring 43 can be effectively utilized only for the valve body 41 to close the valve seat 40. Therefore, even if the biasing force of the closing spring 43 is relatively small, the closing spring 43 can be closed sufficiently, and the valve shaft 4
As the stepping motor 42 that pushes 4 with the eccentric cam 48 to operate the valve element 41, a small one with low torque can be practically used.

The position sensor 45 is an encoder which is interlocked with the rotation of the cam shaft 49 of the eccentric cam 48, and can send a closing position signal to the controller 32 at a position where the valve body 41 surely closes the valve seat 40. Thus, even if the stepping motor 42 is out of step for some pulses during operation, it can be surely confirmed whether or not it is in the closed position.
When the control unit 32 receives the closing position signal, the number of pulses to the stepping motor 42 can be reset to zero,
Safer and more reliable combustion amount control is possible.

Further, the flame sensor 26 converts the amount of heat received from the flame 31 into an electric signal according to the amount of combustion of the burner 25, and in the present embodiment, it is composed of a thermoelectric element, but it is detected by the amount of light or resistance change. It may be one.

Conventionally, for example, the proportional control valve 8 does not have a closing function and requires a separate closing valve 2. If a double closing function is required for safety reasons, another closing valve is attached. It was inevitable, and there was a problem in terms of downsizing of equipment and assembly man-hours.

On the other hand, in this embodiment, the valve body 4
1 can surely close the valve seat 40 Stepping motor 4
With the configuration in which the position 2 can be reliably detected by the position sensor 45,
The flame signal from the flame sensor 26 at a predetermined thermal power can be stored in the flame signal storage unit 27, and the gap between the valve seat 40 and the valve body 41 can be accurately and stepwise controlled by the stepping motor 42 according to the applied pulse. ,
With one valve device, it is possible to accurately set and control the combustion amount with good resolution and reproducibility from closing to fully opening.

[0066]

As described above, according to the combustion amount control device of the present invention, the following effects can be obtained.

(1) A flame sensor for converting the flame of the burner into an electric signal and a flame signal storage section for storing the signal are provided. Therefore, it is only necessary to operate the switch of the flame signal storage instruction section at the time of manufacture. It is possible to realize a combustion amount control device that does not require a manual adjustment work.

Further, it is possible to obtain a combustion amount control device capable of rough management of characteristic variations of functional parts such as a variable fuel supply device and a flame sensor, simplifying manufacturing work, and reducing man-hours.

(2) A flame sensor for converting the flame of the burner into an electric signal and a minimum flame signal storage section for storing at least the minimum flame signal are provided. It is possible to realize the combustion amount control device capable of performing the regulation control of the minimum combustion amount without performing mechanical adjustment work by only the work of operating the switch.

Further, it is possible to roughly manage the characteristic variation of the functional parts such as the variable fuel supply device and the flame sensor, simplify the work at the time of production and gas type conversion, and perform safe combustion without burner misfire. A quantity control device is obtained.

(3) Since the flame sensor for converting the flame of the burner into an electric signal and the minimum-maximum flame signal storage section for storing at least the minimum and maximum flame signals are provided, the pressure of the fuel supply source fluctuates. However, the combustion amount can be controlled so as not to deviate from the minimum combustion amount and the maximum combustion amount.

That is, it is possible to eliminate the need for a governor for stabilizing the fuel supply pressure and simplify the structure of the combustion amount control device.

(4) Since the flame sensor for converting the flame of the burner into an electric signal, at least the minimum and maximum flame signals for each gas type group, and the type flame signal storage section and the gas type group changeover switch are provided. It is possible to obtain a combustion amount control device capable of performing a simple and safe gas conversion without electric adjustment and mechanical adjustment work at the time of gas type conversion.

(5) Fuel supply consisting of a flame sensor for converting the flame of the burner into an electric signal, a flame signal storage section for storing the flame signal, and a stepping motor for driving the valve element provided facing the valve seat. Because it has a variable device,
It is possible to accurately and accurately set and control the combustion amount with small resolution and reproducibility.

(6) A flame sensor for converting the flame of the burner into an electric signal, a flame signal storage section for storing the flame signal, a closing spring for urging the valve seat in the direction in which the valve body is closed, and its closing spring. Since it is equipped with a fuel supply variable device that consists of a stepping motor that drives the valve shaft against pressure and a position sensor that detects the closing position, one valve device can accurately and reproducibly with close resolution from closing to fully opening. The amount of combustion can be set and controlled.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a combustion amount control device in an embodiment of the first, fifth and sixth inventions of the present invention.

FIG. 2 is a schematic configuration diagram of a combustion amount control device in the embodiment of the second invention.

FIG. 3 is a schematic configuration diagram of a combustion amount control device in the embodiment of the third invention.

FIG. 4 is a schematic configuration diagram of a combustion amount control device according to an embodiment of the fourth invention.

FIG. 5 is a schematic configuration diagram of a conventional combustion amount control device.

[Explanation of symbols]

 22 Inlet 23 Outlet 24 Fuel supply variable device 25 Burner 26 Flame sensor 27 Flame signal storage unit 28 Flame signal storage instruction unit 29 Flame signal comparison / determination unit 30 Operation signal sending unit 36 Minimum flame signal storage unit 37 Minimum to maximum flame signal storage unit 38 Type flame signal memory 39 Changeover switch 40 Valve seat 41 Valve body 42 Stepping motor 43 Closing spring 44 Valve shaft 45 Position sensor 46 Valve body

Claims (6)

[Claims] 1. A fuel supply variable device having a fuel inlet and an outlet, and a burner for burning the fuel sent from the outlet.
A flame sensor that converts the flame of the burner into an electric signal,
A flame signal storage unit that stores the signal of the flame sensor, a flame signal storage instruction unit that instructs the flame signal storage unit to store the signal of the flame sensor by a switch operation, a storage signal of the flame signal storage unit, and the flame. A combustion amount control device including a flame signal comparison / determination unit that compares and determines a signal from a sensor, and at least an operation signal transmission unit that transmits an operation signal to the fuel supply variable device based on the determination result of the flame signal comparison / determination unit. . 2. A fuel supply variable device having a fuel inlet and an outlet, and a burner for burning the fuel sent from the outlet.
A flame sensor that converts the flame of the burner into an electric signal,
A minimum flame signal storage unit that stores at least the minimum flame signal of the flame sensor, and a flame signal storage instruction unit that instructs to store at least the minimum flame signal of the flame sensor in the minimum flame signal storage unit by a switch operation, and the minimum flame signal. A flame signal comparison / discrimination unit for comparing and discriminating the stored signal of the signal storage unit and the signal from the flame sensor, and an operation signal transmission for transmitting an operation signal to at least the fuel supply variable device based on the discrimination result of at least the flame signal comparison / discrimination unit. And a combustion amount control device. 3. A fuel supply variable device having a fuel inlet and an outlet, and a burner for burning the fuel sent from the outlet.
A flame sensor that converts the flame of the burner into an electric signal,
A minimum to maximum flame signal storage unit that stores at least the minimum flame signal and the maximum flame signal of the flame sensor, and stores at least the minimum flame signal and the maximum flame signal of the flame sensor in the minimum to maximum flame signal storage unit by a switch operation. A flame signal storage instruction unit for instructing, a flame signal comparison determination unit for comparing and determining the signal from the flame sensor and the stored signal of the minimum to maximum flame signal storage unit, and at least the determination result of the flame signal comparison determination unit. A combustion amount control device, comprising: an operation signal transmission unit for transmitting an operation signal to the fuel supply variable device. 4. A fuel supply variable device having a gas inlet and an outlet, and a burner for burning the gas sent from the outlet.
A flame sensor that converts the flame of the burner into an electric signal,
A type flame signal storage unit that stores at least the minimum flame signal and the maximum flame signal of the flame sensor for each gas type group, and the type by switching at least the minimum flame signal and the maximum flame signal of the flame sensor for each gas type group. A flame signal storage instruction unit for instructing to store in a flame signal storage unit, a gas type group changeover switch, a flame signal comparison determination unit for comparing and determining a storage signal of the type flame signal storage unit and a signal from the flame sensor, A combustion amount control device comprising at least an operation signal transmission unit for transmitting an operation signal to the fuel supply variable device according to the determination result of the flame signal comparison / determination unit. 5. A fuel supply variable device comprising a valve seat provided between an inlet and an outlet, a valve body provided so as to face the valve seat, and a stepping motor for driving the valve body, and the outlet. A burner that burns the sent fuel, a flame sensor that converts the flame of the burner into an electric signal, a flame signal storage unit that stores the signal of the flame sensor, and the flame signal by a switch operation of the signal of the flame sensor. A flame signal storage instruction unit for instructing storage in the storage unit, a flame signal comparison determination unit for comparing and determining the storage signal of the flame signal storage unit and the signal from the flame sensor, and at least the determination result of the flame signal comparison determination unit. And a combustion signal control unit for transmitting a control signal to the variable fuel supply device according to the above. 6. A valve body having a valve seat between an inlet and an outlet, a valve body facing the valve seat, and a closing spring for urging the valve seat in a direction in which the valve body closes. A fuel supply variable device including a stepping motor that drives a valve shaft against the closing spring and a position sensor that detects a position of the stepping motor that ensures that the valve body closes a valve seat; A burner that burns the burned fuel, a flame sensor that converts the flame of the burner into an electric signal, a flame signal storage unit that stores the signal of the flame sensor, and a flame signal storage by switching the signal of the flame sensor by a switch operation. Section for instructing to store a flame signal, a flame signal comparison / discrimination section for comparing and discriminating between a signal stored in the flame signal storage section and a signal from the flame sensor, and at least discrimination of the flame signal comparison / discrimination section. Combustion amount control apparatus and an operation signal generating portion for sending an operation signal to the fuel supply changing device by fruit.