JP3357460B2 - Combustion appliance with proportional valve and proportional valve adjusting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proportional valve adjusting device for a combustion appliance for adjusting the maximum opening amount and the minimum opening amount of a gas proportional valve of a combustion appliance such as a water heater.

[0002]

2. Description of the Related Art FIG. 10 is a schematic diagram of a water heater, which is one of the combustion appliances with a proportional valve. In the figure, a water heater 10 is provided with a burner 14 and a heat exchanger 11,
A gas pipe 54 that supplies fuel gas to the burner 14 has a burner 14
A proportional valve 15 for controlling the amount of supply gas supplied to is provided. Further, the water heater 10 is provided with a combustion control unit 12, and a remote control 21 is connected to the combustion control unit 12, so that the temperature of the hot water produced by the water heater 10 can be set by the remote control 21. ing.

[0003] In this type of water heater 10, when the water inlet solenoid valve 23 is opened and a certain amount of water is sent from the water supply pipe to the heat exchanger 11, the fuel gas introduced from the gas pipe 54 is shown in the figure. The air sent by the non-combustion fan is introduced into the burner 14 to perform burner combustion.
The water passing through the heat exchanger 11 is heated to become hot water and is discharged. At this time, the combustion control unit 12 controls the opening amount of the proportional valve 15 and the rotation control of a combustion fan (not shown). The hot water having the set temperature set by the remote controller 21 is produced, and the hot water is discharged.

[0004] By the way, as for the burning appliances such as the water heater 10, the maximum burning capacity and the minimum burning capacity are determined in advance by each burning appliance, and the water heater 10 and the like have the burning appliances as shown in FIG. The proportional valve 15 is controlled within the range between the maximum valve opening amount A of the proportional valve 15 corresponding to the maximum combustion capacity and the minimum valve opening amount B of the proportional valve 15 corresponding to the minimum combustion capacity, so that the proportional valve 15 is supplied to the burner 14. The supply gas amount is controlled so that the combustion operation is performed within the range between the predetermined maximum combustion capacity and the predetermined combustion capacity.

As shown in FIG. 12, the opening amount of the proportional valve 15 is proportional to the valve drive current for opening and closing the proportional valve 15. By setting the maximum valve opening drive current corresponding to the valve opening A and the minimum valve opening drive current corresponding to the minimum valve opening B, the maximum valve opening A and the minimum valve opening B are adjusted. ing. However, since the relationship between the valve drive current and the opening amount of the proportional valve 15 varies among the individual proportional valves 15, each proportional valve 15, that is, the proportional valve It is necessary to set a maximum valve opening drive current and a minimum valve opening drive current of 15, and conventionally, the maximum valve opening drive current and the minimum valve opening drive current are set as follows.

First, the relationship between the pressure of the supply gas supplied to the burner 14 and the combustion capacity of the water heater 10 is examined in advance by experiments or the like. Then, for example, as shown by a dotted line portion in FIG. 10, a pressure gauge 58 is connected to the pressure detection port 60, and an operator performing adjustment of the proportional valve 15 is in the combustion control unit 12 while watching the pressure of the pressure gauge 58. The volume of the valve drive current of the proportional valve 15 is adjusted, and when the pressure of the gas supplied to the burner becomes, for example, 115 mmAq based on the gas pressure and the data on the combustion capacity of the water heater 10, the water heater 10 By determining that combustion at the maximum combustion capacity is to be performed and fixing at the volume position at this time, the combustion control unit 12 sets the valve drive current derived from this resistance value as the maximum valve-opening drive current, and the gas pressure is reduced. When the pressure reaches 15 mmAq, it is determined that the combustion with the minimum combustion capacity of the water heater 10 is performed, and by fixing the volume at this time, the combustion control unit 12 minimizes the valve drive current derived from this resistance value. The valve opening drive current was used.

The water heater 10 has a maximum valve opening setting mode for setting the maximum valve opening of the proportional valve 15, a minimum valve opening setting mode for setting the minimum valve opening of the proportional valve 15, and a maximum valve opening setting mode for setting the minimum valve opening of the proportional valve 15. A mode changeover switch 63 that manually switches between an operation mode in which combustion operation is performed by controlling an opening amount of the proportional valve 15 within a range between the valve opening amount and the minimum valve opening amount; When setting the drive current, manually set the mode changeover switch 63 to the maximum valve opening amount setting mode and perform the volume adjustment operation.When setting the minimum valve opening drive current, manually set the mode changeover switch 63 to the minimum valve opening amount setting mode. The volume is adjusted by switching to the mode.

Then, during normal combustion operation, the mode changeover switch 63 is manually switched to the operation mode,
By controlling the valve-opening drive current of the proportional valve 15 within the range of the maximum valve-opening drive current and the minimum valve-opening drive current by the combustion control unit 12, the valve opening amount of the proportional valve 15 is controlled to Perform combustion operation.

[0009]

However, water heaters
During the combustion operation such as 10, the pressure of the supply gas supplied to the water heater 10 is unstable because it changes every time the opening amount of the proportional valve 15 is adjusted, and the pressure of the supply gas is measured by the pressure gauge 58. The skill of adjusting the pressure of the supply gas supplied to the water heater 10 and the volume of the valve drive current of the proportional valve 15 by hand, and adjusting the opening amount of the proportional valve 15 requires skill, In addition, there is a problem that it takes a very long time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to adjust a proportional valve of a combustion appliance such as a water heater in a short time without requiring a skilled technique. It is an object of the present invention to provide a proportional valve adjustment device for a combustion appliance.

[0011]

In order to achieve the above object, the present invention is configured as follows. That is, the proportional valve adjusting device for a combustion appliance with a proportional valve according to the present invention provides a supply gas amount supplied to a burner of the combustion appliance with a maximum valve opening amount corresponding to a maximum combustion capacity and a minimum valve opening amount corresponding to a minimum combustion capacity. And a specification data input unit for inputting specification data of a combustion appliance to be adjusted; and at least a maximum valve opening of the proportional valve in the combustion appliance according to each specification. A database provided with initial setting data of a maximum valve opening drive current corresponding to the amount and a minimum valve opening drive current corresponding to the minimum valve opening amount; a gas flow sensor for detecting a gas supply amount supplied to the proportional valve; An input calculation unit for calculating the amount of combustion heat based on the gas flow rate detected by the gas flow rate sensor during burner combustion given the initial setting data; and corresponding to the maximum combustion capacity of the specification value of the combustion equipment to be adjusted. The minimum combustion heat amount corresponding to the maximum combustion heat amount and the minimum combustion capacity is compared with the calculation result of the input calculation unit to variably adjust the valve-opening drive current of the proportional valve, and the input calculation value is within the specification range of the maximum combustion heat amount. Is set as the maximum valve opening drive current, and the valve opening drive current when the input calculation value falls within the tolerance range of the minimum combustion heat quantity of the specification value is set as the minimum valve opening drive current. a capability setting unit; have a monitor the gas flow rate upstream of the proportional valve
With the gas primary pressure at the set gas pressure,
The characteristic is that the proportional valve current adjustment is performed .

Further, in the combustion apparatus with a proportional valve according to the present invention, the amount of gas supplied to the burner falls within a range between a maximum valve opening corresponding to the maximum combustion capacity of the apparatus and a minimum valve opening corresponding to the minimum combustion capacity. And a maximum valve opening amount setting mode for setting the maximum valve opening amount of the proportional valve, a minimum valve opening amount setting mode for setting the minimum valve opening amount of the proportional valve, a maximum valve opening amount and a minimum valve opening amount. 2. A combustion control device, comprising: a mode changeover switch for switching between an operation mode in which combustion operation is performed by controlling a valve opening amount of the proportional valve within a range of the valve opening amount. The apparatus is characterized in that a mode switching means for automatically switching the mode switching switch is provided by a mode automatic switching signal applied from the proportional valve adjusting device side.

Further, the present invention further comprises a valve-opening drive current memory unit for storing the maximum valve-opening drive current value and the minimum valve-opening drive current value set by the capacity setting unit of the proportional valve adjusting device. It has a characteristic configuration of a combustion appliance with a proportional valve.

[0014]

In the present invention having the above-mentioned structure, specification data of a combustion appliance with a proportional valve to be adjusted is inputted by the specification data input section, and the maximum and minimum valve opening drive currents of the proportional valve in the combustion appliance according to each specification are included. Given the initial setting data, burner combustion is performed, the gas supply amount at the time of burner combustion is detected by a gas flow rate sensor, the amount of combustion heat is calculated by an input calculation unit based on the detected gas flow rate value, The valve opening drive current of the proportional valve is automatically adjusted so that the input calculation value falls within the tolerance range of the maximum combustion heat amount of the specification value, and the adjusted valve opening drive current is set as the maximum valve opening drive current. In addition, the valve opening drive current of the proportional valve is automatically adjusted so that the input calculation value falls within the tolerance range of the minimum combustion heat amount of the specification value, and the adjusted valve opening drive current is minimized. It is set as the dynamic current.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same symbols are assigned to the same parts as in the conventional example, and the detailed description thereof is omitted.
FIG. 2 shows a main part of an embodiment of a water heater that is a combustion device with a proportional valve according to the present invention and a proportional valve adjusting device of the water heater. In the figure, a proportional valve adjusting device 24 that adjusts a proportional valve of the water heater 10 includes a gas flow sensor 13 that detects a gas supply amount supplied to the proportional valve 15 of the water heater 10, and a proportional valve of the water heater 10. A computer 16 that performs adjustment control of the gas, a gas type switching supply unit 17 that switches the gas type and the like to supply the fuel gas to the water heater 10 according to an instruction of the computer 16,
It has a gas type reading means 18 and a pressure gauge 58. The gas flow sensor 13 is a sensor that has been calibrated very accurately, and is constituted by a master sensor serving as a reference.

The water heater 10 has substantially the same construction as the water heater shown in FIG. 10. The water heater 10 of this embodiment has a proportional valve 15, a combustion control unit 12, a proportional valve as shown in FIG. The drive current memory unit 20, the mode switch 63, and the mode switch 64 are provided. As shown in FIGS. 2 and 4, a memory card 19 such as an ID card is affixed to the water heater 10, and the memory card 19 has a model and number of the water heater 10, a gas type used, and a destination. First, data such as exhaust variations are input in advance.

As shown in FIG. 1, the computer 16 of the proportional valve adjusting device 24 includes a specification data input unit 1, a data reading unit 2, a database 5, a capacity setting unit 8, an input operation unit 9, and a mode switching signal output unit. It is configured to have
The database 5 includes an initial setting data memory unit 3 and a tolerance memory unit 4, and the capacity setting unit 8 includes a valve drive current setting unit 6 and a heat quantity comparison determination unit 7.

The mode switching signal output section 62 outputs a mode automatic switching signal for switching a mode switching switch 63 provided on the water heater 10, and outputs the mode automatic switching signal to a mode on the water heater 10 side. Switching means 64
Add to

The specification data input section 1 is for inputting specification data of the water heater 10, that is, data such as the type of gas used in the memory card 19. The input specification data is added to the data reading section 2. .

The initial setting data memory section 3 of the database 5 stores a maximum valve opening drive current corresponding to the maximum valve opening amount of the proportional valve 15 in the water heater 10 corresponding to each specification, and a minimum valve opening amount of the proportional valve 15. The minimum valve opening drive current corresponding to and the proportional valve drive current at the start of the combustion operation of the water heater 10 are input in advance,
For example, the gas used in the water heater 10 has a standard exhaust specification of 13 A, and the maximum combustion heat amount corresponding to the maximum combustion capacity of the water heater 10 is 3000.
At 0 kcal, the maximum valve opening drive current of the proportional valve 15 is 110 m
A, and data for each specification is input such that the minimum valve opening drive current is 12 mA when the minimum combustion heat amount corresponding to the minimum combustion capacity of the water heater 10 is 4500 kcal. A water heater 10 is stored in the tolerance memory unit 4 of the database 5.
The tolerance range of the maximum combustion heat amount and the tolerance range of the minimum combustion heat amount for each specification are input in advance, for example, water heater 10
When the type of gas used is 13 A, the tolerance range of the maximum combustion heat is ± 1000 kcal, and the tolerance range of the minimum combustion heat is ± 400 kcal.
It is entered for each specification such as kcal.

When the specification data of the water heater 10 to be adjusted is added from the specification data input unit 1, the data reading unit 2 reads the initial setting data corresponding to the specification data from the initial setting data memory unit 3. The tolerance range of the maximum combustion heat amount and the tolerance range of the minimum combustion heat amount corresponding to the specification data are read from the tolerance memory unit 4. The read initial setting data is added to the valve driving current setting unit 6, and the read maximum and The data in the tolerance range of the minimum combustion heat amount is added to the heat amount comparison / judgment unit 7.

The valve drive current setting section 6 is a proportional valve of the water heater 10.
The valve drive current of 15 is set, and the set valve drive current is added to the combustion control unit 12. When the initial setting data corresponding to the specification of the water heater 10 is added from the data reading unit 2, the maximum valve opening is performed. The initial setting value of the driving current and the initial setting value of the minimum valve opening driving current are added to the combustion control unit 12 of the water heater 10.

The calorie comparing and judging section 7 is adapted to receive the calculation data from the input calculating section 9 together with the data of the tolerance range of the maximum and minimum combustion heat quantity from the data reading section 2. The valve drive current setting unit 6 gives initial setting data to the combustion control unit 12 and performs combustion of the burner 14 of the water heater 10 based on the detected gas flow rate of the gas flow rate sensor 13 based on the detected gas flow rate. The calorie calculation is performed based on the gas specific gravity, the gas temperature, the atmospheric pressure, and the like, the calorific value of the combustion is calculated, and the calculation result is added to the calorie comparison / determination unit 7.

The calorie comparison / determination unit 7 includes an input calculation unit 9
Is compared with the maximum combustion heat amount tolerance range and the minimum combustion heat amount tolerance range applied from the data reading unit 2, for example, during the combustion operation of the water heater 10 at the maximum combustion capacity (burner). Comparing the input calculation value during combustion) with the tolerance range of the maximum combustion heat quantity, and when the input calculation value is larger than the tolerance range of the maximum combustion heat quantity, the opening amount of the proportional valve 15 of the water heater 10 is reduced. A determination signal is applied to the valve drive current setting unit 6 so as to set the valve drive current in the direction in which the valve is operated. When the input calculation value is smaller than the maximum combustion heat amount tolerance range, the valve opening amount of the proportional valve 15 is increased. The determination signal is applied to the valve drive current setting unit 6 so as to set the valve drive current in the direction of the valve drive current. Then, when the input calculation value falls within the tolerance range of the maximum combustion heat quantity, the heat quantity comparison determination section 7 sets the valve drive current of the proportional valve 15 at that time as the maximum valve opening drive current. 6 is added to the determination result (the maximum valve opening drive current setting determination signal).

In the same manner as above, the calorie comparison / determination unit 7 opens the proportional valve 15 when the input operation value during the combustion operation with the minimum combustion capacity of the water heater 10 is larger than the tolerance range of the minimum combustion calorie. A judgment signal is added so as to set the valve drive current in the direction to increase the valve amount, and when the input operation value is smaller than the tolerance range of the minimum combustion calorie, the valve drive current is increased in the direction to increase the valve opening amount of the proportional valve 15. Setting unit 6
When the input calculation value falls within the minimum combustion heat amount tolerance range, the valve drive current setting section 6 sets the valve opening drive current of the proportional valve 15 at that time as the minimum valve opening drive current. The judgment result (minimum valve opening drive current setting judgment signal) is added.

When the valve driving current setting section 6 receives the judgment result from the heat quantity comparing and judging section 7, based on the judgment result, for example, when it is desired to increase the opening amount of the proportional valve 15, the valve driving current setting section 6 sets the valve driving current previously set. When the correction is set by increasing the current, and when it is desired to reduce the valve opening amount of the proportional valve 15, the correction is set by decreasing the valve drive current set previously, and the set valve drive current is added to the combustion control unit 12 and When the maximum valve-opening drive current setting determination signal is added from the heat quantity comparison / determination unit 7, the maximum valve-opening drive current setting signal is transmitted to the combustion control unit 12.
Similarly, when the minimum valve opening drive current setting determination signal is added from the calorie comparison / determination section 7, the minimum valve opening drive current setting signal is added to the combustion control section 12.

As described above, the valve drive current setting unit 6
Setting unit 8 having a comparison unit 7 for determining the amount of heat
Compares the maximum combustion heat amount corresponding to the maximum combustion capacity of the specification value of the combustion appliance to be adjusted and the minimum combustion heat amount corresponding to the minimum combustion performance with the calculation result of the input operation unit 9, and determines whether the water heater 10 is a combustion appliance. The valve opening drive current of the proportional valve 15 is variably adjusted, and the valve opening drive current when the input calculation value falls within the tolerance range of the maximum combustion heat quantity of the specification value is set as the maximum valve opening drive current. The valve-opening drive current when the specified value falls within the tolerance range of the minimum amount of combustion heat is set as the minimum valve-opening drive current.

The proportional valve drive current memory section 20 of the water heater 10
The proportional valve adjusting device 24 functions as a valve opening driving current memory unit that stores the maximum valve opening driving current value and the minimum valve opening driving current value set by the capacity setting unit 8 of the proportional valve adjusting device 24. When a valve drive current setting signal for the proportional valve 15 is applied to the combustion control unit 12 from the valve drive current setting unit 24, the value of the valve drive current is stored. For example, the initial value of the maximum valve opening drive current from the valve drive current setting unit 6 is
When the value is added to the value, the value is stored. After that, when the valve driving current of the proportional valve 15 is adjusted by the proportional valve adjusting device 24 and the maximum valve opening driving current is corrected, the corrected maximum valve opening is corrected. The driving current is stored, and thereafter, when the maximum valve opening driving current is finally set, the final maximum valve opening driving current is stored. Similarly, for the minimum valve-opening drive current, the initial set value, the correction value, and the final set value of the minimum valve-opening drive current are sequentially stored, and finally, the final setting of the minimum valve-opening drive current is performed. Store the value.

The mode switching means 64 of the water heater 10 automatically switches the mode switching switch 63 in response to a mode automatic switching signal applied from the mode switching signal output unit 62 of the proportional valve adjusting device 24. That is, upon receiving a mode automatic switching signal from the mode switching signal output unit 62, for example, when performing a normal combustion operation of the water heater 10, the operation mode switching switch 63 is automatically set to an operation mode (operation instruction). When adjusting and setting the maximum valve opening drive current of the proportional valve 15 of the water heater 10, the operation mode changeover switch is automatically set to a maximum valve opening amount setting mode (hereinafter, referred to as a maximum mode instruction or a MAX instruction). Adjusts and sets the maximum valve opening drive current so as to perform combustion at the maximum combustion capacity, and automatically adjusts and sets the operation mode changeover switch 63 to the minimum valve opening amount when adjusting and setting the minimum valve opening drive current of the proportional valve 15. In the setting mode (hereinafter, referred to as a minimum mode instruction or a MIN instruction), the combustion with the minimum combustion capacity of the water heater 10 is performed, and the minimum valve opening drive current is set. That.

FIG. 3 shows the gas type switching means 17 of the proportional valve adjusting device 24. The gas type switching supply means 17 of the present embodiment is provided with a gas type 13 so as to correspond to the specification of the water heater 10.
A gas supply line 25 and propane, butane, and air gas supply lines 26 to 28 are provided.
To 28 include safety valves 31 to 34 and filters 35 to 38, valves GS1 to GS4, and governors GR1 to GR, respectively.
4. Gas flow meters 41 to 44 and check valves 45 to 48 are interposed. These gas supply lines 25 to 28 are connected via a gas pipe 51 to a proportional valve minimum valve opening adjustment line 53 and a proportional valve. The proportional valve maximum valve opening amount adjustment line 52 and the proportional valve minimum valve opening amount adjustment line 53 are connected to a maximum valve opening amount adjustment line 52.
Is connected to the water heater 10 via the. The gas pipe 54 has a gas flow sensor 13 and a pipe purge valve GS7.
And a pressure gauge 58 (GP1).

In this embodiment, the gas pressure (primary pressure) of the supply gas detected by the pressure gauge 58 is constantly monitored by the computer 16, and the maximum valve opening of the proportional valve 15 is adjusted. Sometimes, the valve GS6 of the proportional valve maximum valve opening adjustment line 52 is opened and the valve GS5 of the proportional valve minimum valve opening adjustment line 53 is closed, and the gas pressure detected by the pressure gauge 58 is, for example, 13 A gas. 200 mmAq for seeds,
150mmAq for 6A gas type, 100mm for 4A gas type
Aq, in the case of propane gas species, to be 280 mmAq,
When the governor GS6 is adjusted by the computer 16, similarly, when adjusting the minimum opening amount of the proportional valve 15, the valve GS5 of the proportional valve minimum opening amount adjustment line 53 is opened to open the proportional valve maximum opening amount adjustment line. The valve GS6 of 52 is closed, and the governor GR5 of the proportional valve minimum valve opening adjustment line 53 is adjusted so that the pressure of the pressure gauge 58 becomes constant.

Incidentally, according to the specification of the water heater 10, for example, 13
When the gas of A is supplied to the water heater 10, the valve GS1 of the gas supply line 25 of 13A is opened, the governor GR1 is adjusted, and the gas of 13A is supplied through the gas pipe 51 to the proportional valve maximum valve opening adjustment line 52. Alternatively, the valve is supplied to the proportional valve minimum valve opening amount adjustment line 53 side, and similarly, the valves of the gas supply lines 25 to 28 of each supply gas corresponding to the type of gas used in the water heater 10 to be adjusted. GS1 to GS4 and governor GR1 to G
By operating R4, a desired gas can be supplied to the water heater 10 side.

For example, when the type of gas used is 6 A, a gas of 4 A can be supplied by a combination of butane and air. At that time, the governor GR 3 of the gas supply line 27 of butane is connected to a gas flow meter. The ratio of butane and air is adjusted by adjusting the governor GR4 of the air gas supply line 28 with reference to the gas flow rate detected by the gas flow meter 44. Thus, a gas of 6A can be produced and supplied, and similarly, gases of various gas types such as 6B and 6C can be supplied.

This embodiment is configured as described above.
Next, the operation will be described with reference to the flowcharts shown in FIGS. 5 to 7 and FIGS. First, FIGS.
As shown in FIG. 5, the operator connects the water heater 10 to be adjusted to which the memory card 19 is affixed and the proportional valve adjusting device 24 at step 101 in FIG. 5, and as shown in FIGS. The computer 16 of the adjusting device 24 and the combustion controller of the water heater 10
12 is connected, and the gas can be supplied to the proportional valve 15 side of the water heater 10 from the gas type etc. switching supply means 17 of the proportional valve adjusting device 24.

Next, in step 102 in FIG. 5, the gas type reading means 18 reads the gas type of the water heater 10 inputted to the memory card 19 attached to the water heater 10, and reads the gas type.
Check the 10 gas types used, and in step 103
The keyboard 16 is turned on, the password is transmitted in step 104, and the proportional valve adjusting operation of the water heater 10 under the control of the computer 16 is started in a state of accepting an inspection sequence program different from the sequence program operation of the normal operation. The data of the used gas type read by the gas type reading means 18 is automatically added to the computer 16 and input to the specification data input section 1.

Next, in step 105, the specification data other than the gas type of the water heater 10 input to the memory card 19 is input to the specification data input unit 1, and a check command is transmitted based on the input specification data. To check the model of the water heater 10. Next, in step 106, a setting gas such as 13 A corresponding to the gas type used by the water heater 10 is created by the gas type switching supply means 17, and the valve of the proportional valve maximum valve opening adjustment line 52 shown in FIG. Open GS6. That is, when the set gas is 13A, the gas supply line of 13A
By opening 25 valves GS1 and governor GR1, 13A gas is supplied to the proportional valve maximum valve opening adjustment line 52 side and supplied to the gas pipe 54. Next, at step 107, the pipe valve GS7 of the gas pipe 54 is turned on, and the pipe is purged.

Next, at step 108, the operation switch of the water heater 10 is turned on, and at step 109, the proportional valve adjusting device 24 is turned on.
A mode automatic switching signal is added to the mode switching means 64 of the water heater 10 from the mode switching signal output section 62 of
Automatically switches the operation mode changeover switch 63 to the minimum mode instruction (MIN instruction). In step 110, the data reading unit 2 of the computer 16 reads the database 5
The initial setting value of the minimum valve opening drive current corresponding to the minimum valve opening amount according to the specification of the water heater 10 is read from the initial setting memory unit 3 and the value is added to the valve drive current setting unit 6 to set the valve drive current. In addition to the combustion control section 12 of the water heater 10 from the section 6, the initial value of the minimum valve opening drive current is written and stored in the proportional valve drive current memory section 20.

Next, at step 111, an automatic mode switching signal is applied from the mode switching signal output section 62 to the mode switching means 64, and the operation mode switching switch is switched by the mode switching means 64.
63 is automatically switched to the maximum mode instruction (MAX instruction), and the initial setting data of the maximum valve opening drive current of the water heater 10 input to the initial setting data memory unit 3 of the database 5 is read in the same manner as described above. The data is read by the unit 2 and is written and stored as the maximum valve opening drive current initial setting value in the proportional valve drive current memory unit 20 in addition to the valve drive current setting unit 6 and the combustion control unit 12 from the valve drive current setting unit 6.

Next, at step 113, the operation mode changeover switch 63 is automatically switched to the operation instruction by the mode changeover means 64 in accordance with the output of the mode changeover signal output section 62 (automatic mode changeover signal) in the same manner as described above. In step 114,
The combustion control unit 12 of the water heater 10 turns on the water inlet solenoid valve 23 to start the combustion operation of the water heater 10. At this time, it is confirmed whether or not the water heater 10 has an abnormality such as gas leakage.

Next, in step 115, the operation mode changeover switch 63 is automatically switched to the MAX instruction in the same manner as described above. By setting the operation mode changeover switch to the MAX instruction, the water heater 10 is set to the maximum combustion. Drive by ability.
Then, in step 116, the proportional valve maximum valve opening adjustment line
The opening degree of the governor GR6 of 52 is adjusted, whereby the value of the gas pressure (primary pressure) detected by the pressure gauge 58 (GP1) is fed back (FB) and set so that the value becomes 200 mmAq. I do. Then, in step 117 of FIG. 6, the input calorie 9 of the proportional valve adjuster 24 inputs the amount of combustion heat during the combustion operation at the maximum combustion capacity of the water heater 10 based on the gas flow rate detection value of the gas flow rate sensor 13. Calculate,
The calorific value comparison judging unit 7 judges whether or not the calculation result is within the tolerance range of the maximum combustion heat amount of the specification value of the water heater 10 read from the tolerance memory unit 4 of the database 5, and the input operation value is the maximum combustion heat amount. The valve opening current of the proportional valve 15 is variably adjusted by sequentially correcting the valve driving current set by the valve driving current setting section 6 until the input value falls within the tolerance range of the maximum combustion heat amount until the valve driving current is set within the tolerance range. When entering, the valve driving current at that time is set as the maximum valve opening driving current in step 118, and written and stored in the proportional valve driving current memory unit 20 of the water heater 10. During such valve drive current adjustment (during adjustment of the valve opening amount of the proportional valve 15), the pressure gauge
Although the detected value of 58 changes, the above-mentioned maximum valve-opening drive current is adjusted while adjusting the opening degree of the governor GR6 so that this value always becomes 200 mmAq.

Next, at step 119, the operation mode changeover switch 63 is automatically set to the MIN instruction by the mode changeover means 64 in accordance with the output of the mode changeover signal output section 62. By setting the operation mode changeover switch to the MIN instruction, the water heater 10 performs combustion with the minimum combustion capacity. Then, at step 120, the valve GS5 of the proportional valve minimum valve opening adjusting line 53 is opened, and then the valve GS6 of the proportional valve maximum valve opening adjusting line 52 is closed. At step 121, the pressure of the pressure gauge 58 becomes 200 mAq. The opening degree of the governor GR5 of the proportional valve minimum valve opening amount adjustment line 53 is adjusted so as to be as follows.

Then, at step 122, the gas flow sensor
Based on the gas flow rate detection value detected by 13, the input calculation unit 9 calculates the amount of heat of combustion during the combustion operation with the minimum combustion capacity of the water heater 10, and this calculation value is read from the tolerance memory unit 4 of the database 5. The calorific value comparing and judging section 7 compares and judges whether or not the specification value of the water heater 10 has fallen within the tolerance range of the minimum combustion heat quantity, and sets it by the valve drive current setting section 6 until the input operation value falls within the minimum combustion heat quantity tolerance range. The proportional valve 15
Variably adjusted, and when the input calculation value falls within the tolerance range of the minimum combustion heat quantity, the valve drive current at that time is set as the minimum valve drive current in step 123, and the water heater 10
Is written and stored in the proportional valve drive current memory unit 20 of FIG.
At this time, similarly to the above, while the valve driving current is being adjusted (during the adjustment of the opening amount of the proportional valve 15), the detection value of the pressure gauge 58 changes, but this value always becomes 200 mmAq. The minimum valve opening drive current is adjusted while adjusting the opening of the governor GR5.

Next, at step 124, the valve GS6 of the proportional valve maximum valve opening adjustment line 52 is opened and then the valve GS5 of the proportional valve minimum valve opening adjustment line 53 is closed.
Then, in accordance with the output of the mode switching signal output unit 62, the operation mode switching switch 63 is automatically set to the MAX instruction again by the mode switching means 64 so that the water heater 10 burns at the maximum combustion capacity. In step 126, the valve GS6 of the proportional valve maximum valve opening adjustment line 52 is adjusted in the same manner as described above so that the gas pressure detected by the pressure gauge 58 becomes constant,
In step 127, when the water heater 10 performs the combustion operation with the maximum combustion capacity, the opening amount of the proportional valve 15 set based on the maximum valve opening drive current stored in the proportional valve drive current memory unit 20 is used. Whether or not the operation is performed is confirmed by the flow rate of the gas flow sensor 13, and if the operation is not performed as set, the process returns to Step 117, and Steps 117 to 127 are performed.
The operation up to is repeated.

In step 127, the water heater 10 is set as set.
When it is confirmed that the operation of
In step 129, the valve 5 of the proportional valve minimum valve opening adjusting line 53 is opened, and then the valve GS6 of the proportional valve maximum valve opening adjusting line 52 is closed. In step 130, the mode switching means is switched according to the output of the mode switching signal output unit 62. At 64, the operation mode changeover switch 63 is automatically set to the MIN instruction, and at step 131, the opening degree of the governor GR5 is adjusted so that the primary pressure of the supplied gas becomes constant. Then, in step 132, it is confirmed whether the combustion operation is performed with the set minimum valve opening drive current and the set valve opening amount of the proportional valve 15 during the combustion operation with the minimum combustion capacity of the water heater 10, If the combustion operation is not performed as set, the process returns to step 122 to repeat the operations from step 122 to step 132. If the combustion operation is performed as set, the process proceeds to step 133 in FIG.

As described above, after setting the maximum valve-opening drive current in step 118 and setting the minimum valve-opening drive current in step 123, in steps 127 and 132,
By checking whether the combustion operation is performed based on the set valve-opening drive current, even if one side of the maximum valve-opening drive current and the minimum valve-opening drive current is adjusted, the adjustment of the other side is shifted. Even if it does, the adjustment is performed again at that time so that the maximum and minimum valve opening drive currents can be set accurately.

By the above operation, the input calculation value when the water heater 10 is operated at the maximum combustion capacity is
The maximum valve opening drive current of the proportional valve 15 is set so as to fall within the tolerance range of the maximum combustion heat amount of the specification value of the water heater 10, and the maximum valve opening amount of the proportional valve 15 is set based on the set maximum valve opening drive current. Controlled combustion operation at maximum combustion capacity is performed,
The minimum valve opening drive current of the proportional valve 15 is set so that the input calculation value when the operation of the water heater 10 at the minimum combustion capacity is performed is within the tolerance range of the minimum combustion heat amount of the specification value of the water heater 10, When it is confirmed that the opening amount of the proportional valve 15 is controlled based on the set minimum valve opening drive current and the combustion operation with the minimum combustion capacity is performed, at step 133 in FIG. The mode switching means 64 switches the operation mode switch 63 to the operation instruction.

Then, at step 134, the water supply electromagnetic valve 23 of the water heater 10 is turned off, at step 135, the valves GS1 to GS7 of the gas type switching means 17 of the proportional valve regulator are turned off, and at step 136, the water heater 10 is turned off. The connector connecting the and the proportional valve adjusting device 24 is removed, and the adjusting operation of the proportional valve is completed. If the water heater 10 does not perform the combustion operation as set even if the proportional valve adjusting operation is repeatedly performed, it is determined that the water heater has an abnormality, and an inspection of an abnormal portion is performed.

According to the present embodiment, by the above operation, first, the proportional valve of the water heater 10 is automatically adjusted by the initial setting data of the database 5 based on the specification data of the water heater to be adjusted, and the combustion operation is performed. And then water heater 10
The maximum valve opening drive current of the proportional valve 15 is automatically adjusted and set so that the maximum combustion heat amount corresponding to the maximum combustion capacity of the specified value falls within the tolerance range of the maximum combustion heat amount of the water heater 10 given in advance. Similarly, the minimum valve opening drive current of the proportional valve 15 is automatically adjusted so that the minimum combustion heat amount corresponding to the minimum combustion capacity of the specification value of the water heater 10 falls within the tolerance range of the minimum combustion heat amount of the water heater 10 which is given in advance. Therefore, the maximum valve opening drive current and the minimum valve opening drive current of the proportional valve 15 of the water heater 10 can be adjusted and set accurately in a short time.

This adjustment operation is performed by the gas flow sensor 13.
Is performed based on the amount of combustion heat calculated by the input calculation unit 9 based on the detected gas flow rate value of the gas flow rate. Unlike the case where the volume adjustment of the valve drive current is performed, the proportional valve drive current can be quickly and accurately adjusted based on a stable gas flow rate, and no skilled technique is required.

Further, in the above embodiment, the tolerance range of the maximum combustion heat quantity of the specification value of the water heater 10 is input to the tolerance memory unit 4 of the database 5 as a value, for example, ± 1000 kcal. The tolerance range of the minimum combustion heat amount of the specification value is input as a value of, for example, ± 400 kcal. However, the tolerance range input to the tolerance memory unit 4 is not particularly limited. May be given as percentages of ± 10% to the maximum and minimum combustion heat amounts, respectively. Also, the tolerance range may be zero.

Further, in the above embodiment, the proportional valve adjusting device
The gas type reading means 18 is provided at 24, and the used gas type input to the memory card 19 of the water heater 10 is inputted to the specification data input unit 1 of the computer 16 via the gas type reading means 18. , The gas type reading means 18 is omitted, and the water heater 10
The data of the used gas type may be directly input from the memory card 19 to the specification data input unit 1 of the computer 16.

Further, in the above embodiment, the proportional valve driving current memory section 20 is provided in the water heater 10, and the proportional valve driving current set by the valve driving current setting section 6 of the proportional valve adjusting device 24 is stored in the proportional valve driving current memory. Although a part of the proportional valve driving current memory unit 20 is provided in the proportional valve adjusting device 24 to store the valve driving current by the valve driving current setting unit 6,
The proportional valve is adjusted, the final maximum valve opening drive current value and the minimum valve opening drive current value set after the adjustment is completed are added to the water heater 10 side, and the final current values are stored in the proportional valve drive current memory unit 20. May be set.

Further, in the above embodiment, the memory card 19
Is constituted by an ID card or the like, so that the specification data input to the memory card 19 can be automatically read by the computer 16 of the proportional valve adjuster 24. The card may be used, and the operator may perform an operation of inputting the specification data input in the barcode to the computer 16, or the operator may input the specification data using a keyboard or the like without using the memory card 19. May be performed.

Further, as shown in FIGS. 8 and 9, the gas flow rate sensor 13 and the input calculation unit 9 of the proportional valve adjusting device 24 are omitted, and a gas pressure comparison / judgment unit is provided instead of the calorie comparison / judgment unit 7. The flow rate of the gas supplied to the burner 14 based on the gas pressure detected by the gauge 58 is estimated from the relationship data between the gas pressure and the gas flow rate obtained in advance through experiments and the like, and further detected by the pressure gauge 58. The measured gas pressure value is compared with the tolerance gas pressure stored in the tolerance memory unit 4 by the gas pressure comparison / determination unit, and based on the gas pressure so that the detected gas pressure value falls within the tolerance gas pressure. Proportional valve 15 as in the example
The maximum valve opening drive current and the minimum valve opening drive current may be automatically set.

Further, the proportional valve adjusting device for a combustion appliance according to the present invention is not limited to the proportional valve adjusting device for the water heater 10 as in the above embodiment, but is a proportional valve adjusting device for various combustion appliances other than the water heater. It is applied as.

[0056]

According to the present invention, the initial setting of the maximum valve opening drive current corresponding to the maximum valve opening amount and the minimum valve opening drive current corresponding to the minimum valve opening amount of the proportional valve in the combustion appliance corresponding to each specification. Burner combustion is performed on the basis of the data, the amount of combustion heat during burner combustion at the maximum combustion capacity is input-calculated based on the detected gas flow rate of the supply gas, and the input calculation value is a predetermined value of the specification value of the combustion appliance given in advance. The maximum valve opening drive current is adjusted and set to be within the tolerance range of the maximum combustion heat,
On the other hand, the minimum valve-opening drive current is adjusted and set so that the input calculation value of the combustion heat amount at the time of burner combustion with the minimum combustion capacity falls within the tolerance range of the minimum combustion heat amount of the specification value of the combustion equipment given in advance. The setting of the maximum and minimum valve opening driving currents can be performed accurately in a short time.

Further, the adjustment setting of the maximum and minimum valve opening drive currents is performed automatically, and a skilled artisan is not required for the proportional valve adjusting operation as in the prior art, and anyone can easily perform the proportional valve adjusting operation. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a control unit of an embodiment of a proportional valve adjusting device for a combustion appliance according to the present invention.

FIG. 2 is a configuration diagram showing a main part configuration of an embodiment of a proportional valve adjusting device for a combustion appliance according to the present invention, together with a water heater 10 to be adjusted.

FIG. 3 is an explanatory diagram showing a gas type switching supply unit 17 of the embodiment.

FIG. 4 is an explanatory diagram showing an outline of a proportional valve adjusting method performed by the embodiment.

FIG. 5 is a flowchart specifically showing the operation of the embodiment.

FIG. 6 is a flowchart specifically showing the operation of the embodiment following FIG. 5;

FIG. 7 is a flowchart specifically showing the operation of the embodiment following FIG. 6;

FIG. 8 is an explanatory view showing another embodiment of the proportional valve adjusting device for a combustion appliance of the present invention.

FIG. 9 is an explanatory view showing a gas type etc. switching supply means 17 in the proportional valve adjustment device for a combustion appliance shown in FIG. 8;

FIG. 10 is an explanatory view showing a conventional water heater and a method of adjusting a proportional valve of the water heater.

FIG. 11 is a graph showing a relationship between a gas supply amount of a water heater and a combustion capacity.

FIG. 12 is a graph showing a relationship between a proportional valve driving current and a valve opening amount of the proportional valve.

[Explanation of symbols]

 1 Specification data input section 5 Database 7 Heat quantity comparison judgment section 8 Capacity setting section 9 Input calculation section 13 Gas flow sensor 24 Proportional valve adjustment device

Continuing from the front page (72) Inventor Yu Hagiwara 3-4 Fukamidai, Yamato-shi, Kanagawa Prefecture Inside Gaster Co., Ltd. ) Inventor Takashi Kaneko 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Inside Gaster Co., Ltd. (72) Inventor Masahiko Sumita 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Gaster Co., Ltd. (56) References JP 4-263738 (JP, A) Japanese Utility Model 5-79240 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23N 1/00 103 F16K 31/06 310 F24H 1/10 301 F24H 9/20

Claims (3)

(57) [Claims] 1. A proportional valve of a combustion apparatus for controlling a supply gas amount supplied to a burner of the combustion apparatus within a range between a maximum valve opening corresponding to a maximum combustion capacity and a minimum valve opening corresponding to a minimum combustion capacity. A specification data input unit for inputting specification data of a combustion appliance to be adjusted; a maximum valve opening drive current and a minimum valve opening corresponding to at least a maximum valve opening amount of a proportional valve in the combustion appliance according to each specification; A database to which initial setting data of the minimum valve opening drive current corresponding to the valve amount is provided; a gas flow sensor for detecting a gas supply amount supplied to the proportional valve; An input calculation unit for calculating the amount of combustion heat based on the gas flow rate detected by the gas flow rate sensor; and the maximum amount of combustion heat corresponding to the maximum combustion capacity and the minimum combustion capacity corresponding to the specification value of the combustion equipment to be adjusted. Comparing the small combustion heat amount with the calculation result of the input calculation unit, variably adjusts the valve opening drive current of the proportional valve, and calculates the valve opening drive current when the input calculation value falls within the tolerance range of the maximum combustion heat amount of the specification value. is set as the maximum valve opening drive current, a capability setting unit for setting a valve-opening drive current when the input operation value enters the tolerance range of a minimum heat of combustion of the specification value as the minimum valve-opening drive current; have a proportional Upstream of the valve
Monitor the gas flow rate on the side and set the gas primary pressure to the set gas pressure.
The proportional valve current adjustment based on the gas flow rate
Characteristic proportional valve adjustment device for combustion equipment with proportional valve. 2. A proportional valve for controlling an amount of gas supplied to the burner within a range between a maximum valve opening corresponding to a maximum combustion capacity of the appliance and a minimum valve opening corresponding to a minimum combustion capacity of the appliance. The maximum valve opening setting mode to set the maximum valve opening of the proportional valve, the minimum valve opening setting mode to set the minimum valve opening of the proportional valve, and the proportional valve within the range of the maximum valve opening and the minimum valve opening And a mode changeover switch for switching between an operation mode in which combustion operation is performed by controlling a valve opening amount of the combustion valve and a combustion device connected to the proportional valve adjustment device according to claim 1, wherein A mode switching means for automatically switching the mode switching switch in response to a mode automatic switching signal applied from the apparatus. 3. A proportional valve for controlling the amount of gas supplied to the burner within a range between a maximum valve opening corresponding to the maximum combustion capacity of the appliance and a minimum valve opening corresponding to the minimum combustion capacity. The maximum valve opening setting mode to set the maximum valve opening of the proportional valve, the minimum valve opening setting mode to set the minimum valve opening of the proportional valve, and the proportional valve within the range of the maximum valve opening and the minimum valve opening And a mode changeover switch for switching between an operation mode in which combustion operation is performed by controlling a valve opening amount of the combustion valve and a combustion device connected to the proportional valve adjustment device according to claim 1 by a signal. A combustion device with a proportional valve, comprising a valve opening drive current memory unit for storing a maximum valve opening drive current value and a minimum valve opening drive current value set by a capacity setting unit.