JPH0247653B2 - - Google Patents
Info
- Publication number
- JPH0247653B2 JPH0247653B2 JP61017266A JP1726686A JPH0247653B2 JP H0247653 B2 JPH0247653 B2 JP H0247653B2 JP 61017266 A JP61017266 A JP 61017266A JP 1726686 A JP1726686 A JP 1726686A JP H0247653 B2 JPH0247653 B2 JP H0247653B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- proportional valve
- circuit
- current
- proportional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 59
- 238000010586 diagram Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/08—Microprocessor; Microcomputer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/16—Fuel valves variable flow or proportional valves
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Magnetically Actuated Valves (AREA)
- Feeding And Controlling Fuel (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ガス給湯機に用いられるガス比例弁
を駆動するガス比例弁駆動回路、詳しくは必要熱
負荷に応じてガス比例弁の開度を制御する回路に
関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a gas proportional valve drive circuit that drives a gas proportional valve used in a gas water heater, and more specifically, to a gas proportional valve drive circuit that drives a gas proportional valve used in a gas water heater. The present invention relates to a circuit for controlling.
（従来の技術）
従来のガス給湯機のガス比例弁駆動回路は第４
図に示す構成であり、ガス比例弁の調整は次のよ
うにして行なつていた。(Prior art) The gas proportional valve drive circuit of a conventional gas water heater has a fourth
The configuration is shown in the figure, and the gas proportional valve was adjusted as follows.
即ち、（）まず最大燃焼となるように設定し
て比例弁電流のMINである20ｍＡにMIN調整回
路のVR１で調整し、次に比例弁２次圧を測定圧
になるように比例弁のプランジヤーで調整する。
（）最大燃焼となるように設定し、比例弁２次
圧をMAX測定圧になるようにMAXカツト回路
のVR２で電流制限する。 That is, () First, set the maximum combustion, adjust the proportional valve current to 20 mA, which is the MIN, using VR1 of the MIN adjustment circuit, and then adjust the proportional valve plunger so that the proportional valve secondary pressure becomes the measured pressure. Adjust with.
() Set for maximum combustion, and limit the current with VR2 of the MAX cut circuit so that the proportional valve secondary pressure reaches the MAX measured pressure.
しかし乍ら、実際のパターンが、原点を通る直
線でないため上記従来の回路の如く、MIN調整
回路のVR１で20ｍＡに調節しようとすると傾き
をより大きくあるいはより小さくするように働
き、その結果標準パターンとの間にずれが生じ
る。 However, since the actual pattern is not a straight line passing through the origin, when trying to adjust to 20mA with VR1 of the MIN adjustment circuit as in the conventional circuit described above, the slope works to make the slope larger or smaller, and as a result, the standard pattern A discrepancy occurs between the two.
従つて、第６図に示すようにMAX熱負荷が要
求されないにもかかわらずMAXガス量が供給さ
れたり、逆に第５図に示すようにMAX熱負荷が
要求されているにもかかわらず、MAXガス量が
供給されないという現象となる。 Therefore, as shown in Figure 6, the MAX gas amount is supplied even though the MAX heat load is not required, or conversely, as shown in Figure 5, even though the MAX heat load is required, This will result in the phenomenon that the MAX gas amount will not be supplied.
その結果、フアンと比例弁、即ち空気量とガス
量のマツチングがとれず空燃費がくずれる。 As a result, the fan and the proportional valve, that is, the amount of air and the amount of gas, are not matched, resulting in poor air/fuel efficiency.
また、例えば13AのガスでMIN熱負荷のとき、
比例弁に供給される電流が20ｍＡとなるように
VR１を調節すると、LPG、6Cガスにおいては第
９図に示すようにLPガスは16ｍＡ、6Cガスは22
ｍＡとなり、原点がずれてしまう。 Also, for example, when the heat load is MIN with 13A gas,
So that the current supplied to the proportional valve is 20mA
When adjusting VR1, as shown in Figure 9 for LPG and 6C gas, LP gas is 16 mA and 6C gas is 22 mA.
mA, and the origin shifts.
（発明が解決しようとする問題点）
本発明が解決しようとする問題点は、ガス比例
弁の有効比例ガス圧の最低ガス圧に例えば13Aの
ガスを基準とし、他のガス種もこの基準にＯ点を
合わせられるように比例弁電流とガス圧の比例曲
線の傾き修正及び基準点修正を行うことである。(Problems to be Solved by the Invention) The problems to be solved by the present invention are based on the minimum gas pressure of the effective proportional gas pressure of the gas proportional valve being, for example, 13A gas, and other gas types are also based on this standard. The purpose is to correct the slope of the proportional curve of the proportional valve current and gas pressure and correct the reference point so that the O point can be matched.
（問題点を解決するための手段）
上記問題点を解決するために本発明が講ずる技
術的手段は、CPUにおいて演算された必要熱負
荷に基づいてガス比例弁を駆動し、その開度を制
御するガス比例弁駆動回路中に比例弁に付加され
る電流とガス圧の比例曲線の傾きを修正するＦ−
ｉパターン修正回路と、ガス比例弁の有効比例ガ
ス圧における最低ガス圧を供給するのに要する電
流を作り出すミニマム電流付加回路と、比例弁印
加電圧回路を備えるものである。(Means for solving the problem) The technical means taken by the present invention to solve the above problem is to drive the gas proportional valve based on the required heat load calculated in the CPU and control its opening degree. F- to correct the slope of the proportional curve of the current applied to the proportional valve and the gas pressure during the gas proportional valve drive circuit.
The system includes an i-pattern correction circuit, a minimum current adding circuit that generates the current required to supply the minimum gas pressure in the effective proportional gas pressure of the gas proportional valve, and a proportional valve applied voltage circuit.
（作用）
而して、本発明の上記手段によれば、Ｆ−ｉパ
ターン修正回路により、付加電流とガス圧の比例
曲線の傾きがつくられ、ミニマム電流付加回路に
よりMIN電流、例えば20ｍＡに相当する電圧が
作り出され、これらが比例弁印加電圧回路でたし
合わされて、どんなガス種でもＯ点位置が一致す
るパターンになる。(Function) According to the above means of the present invention, the F-i pattern correction circuit creates a slope of the proportional curve between the additional current and the gas pressure, and the minimum current addition circuit creates a slope corresponding to the MIN current, for example, 20 mA. A voltage is generated, and these voltages are added together in the proportional valve applied voltage circuit to form a pattern in which the O point position matches any gas type.
（実施例）
以下、本発明の一実施例を図に基づいて説明す
る。(Example) Hereinafter, an example of the present invention will be described based on the drawings.
ガス比例弁駆動回路は第１図に示すように
CPU Ｅが演算した必要熱負荷に応じて出力する
クロツク信号をアナログ信号に変換するＤ／Ａ変
換器Ｆ、ガス比例弁Ｄに付加される電流とガス圧
の比例曲線の傾きを修正するＦ−ｉパターン修正
回路Ａ、ガス比例弁Ｄの有効比例ガス圧における
最低ガス圧を供給するのに要する電流を作り出す
ミニマム電流付加回路Ｂ、上記パターン修正回路
Ａとミニマム電流付加回路Ｂを足し合わせる比例
弁印加電圧回路Ｃ、及び電圧／電流変換部Ｇとに
より構成されており、その回路構成は第２図に示
す通りである。 The gas proportional valve drive circuit is as shown in Figure 1.
A D/A converter F converts the clock signal outputted according to the required heat load calculated by the CPU E into an analog signal, and F- corrects the slope of the proportional curve of the current and gas pressure applied to the gas proportional valve D. i-pattern correction circuit A, a minimum current addition circuit B that produces the current required to supply the minimum gas pressure in the effective proportional gas pressure of gas proportional valve D, and a proportional valve that adds the above pattern correction circuit A and minimum current addition circuit B. It is composed of an applied voltage circuit C and a voltage/current converter G, and the circuit configuration is as shown in FIG.
而して、この回路において比例弁の調整は、次
のようにして行う。 In this circuit, the proportional valve is adjusted as follows.
即ち、（）まず最小燃焼となるように設定す
る。このときCPU Ｅからはデーター＝０とな
り、Ｆ−ｉパターン修正回路Ａからは0Vの電圧
が出力される。一方ミニマム電流付加回路Ｂでは
常にMIN電流20ｍＡ相当の電圧が出ており、最
小燃焼時には結局20ｍＡの電流がガス比例弁Ｄに
与えられる。 That is, () first, the setting is made so that the minimum combustion is achieved. At this time, the CPU E outputs data=0, and the F-i pattern correction circuit A outputs a voltage of 0V. On the other hand, the minimum current addition circuit B always outputs a voltage equivalent to the MIN current of 20 mA, and a current of 20 mA is ultimately given to the gas proportional valve D during minimum combustion.
そこで、この電流で比例弁Ｄの二次側測定圧が
その有効比例ガス圧の最低ガス圧になるようにガ
ス種毎に比例弁Ｄのプランジヤーを調節し、
MIN調節を行う。 Therefore, with this current, the plunger of the proportional valve D is adjusted for each gas type so that the measured pressure on the secondary side of the proportional valve D becomes the lowest gas pressure of its effective proportional gas pressure.
Perform MIN adjustment.
（）次に最大燃焼となるように設定し、比例
弁Ｄの二次側測定圧が有効比例ガス圧の最大ガス
圧となるようにガス種毎にVR２で調節する。 () Next, set to achieve maximum combustion, and adjust with VR2 for each gas type so that the measured pressure on the secondary side of proportional valve D becomes the maximum gas pressure of the effective proportional gas pressure.
（効果）
本発明は上記の構成であるから以下の利点を有
する。(Effects) Since the present invention has the above configuration, it has the following advantages.
(1) 比例弁電流と出力ガス圧パターンが完全に合
致し、MAX熱負荷が要求されているにもかか
わらず、MAXガス圧にならなかつたり、
MAX熱負荷が要求される前にMAXガス圧に
なつてしまうような現象は生ぜず、従つて、空
気量とガス量のマツチングが正確に出来る。(1) Even though the proportional valve current and output gas pressure pattern perfectly match and the MAX heat load is required, the MAX gas pressure is not reached, or
A phenomenon in which the MAX gas pressure is reached before the MAX heat load is required does not occur, and therefore the air volume and the gas volume can be matched accurately.
(2) 最小ガス圧調整を厳密に行なうことができ、
ガス種に関係なく同じ電流値、例えば20ｍＡを
最低電流として確保することができる。(2) Minimum gas pressure can be precisely adjusted;
The same current value, for example 20 mA, can be secured as the minimum current regardless of the gas type.
第１図は本発明の一実施例を示すガス比例弁駆
動回路のブロツク図、第２図は回路構成図、第３
図は本発明回路による各ガス種の比例弁電流と出
力ガス圧との関係を示すグラフ、第４図は従来の
ガス比例弁駆動回路の回路構成図、第５図、第６
図は従来のガス比例弁駆動回路によりパターンの
ずれが生じる理由を説明する説明図、第７図、第
８図は従来のガス比例弁駆動回路において回路の
バラツキに起因するパターンずれの状態を示す説
明図、第９図は従来のガス比例弁駆動回路におけ
る各種ガスの比例弁電流と出力ガスとの関係を示
すグラフである。
Ａ：Ｆ−ｉパターン修正回路、Ｂ：ミニマム電
流付加回路、Ｃ：比例弁印加電圧回路、Ｄ：比例
弁。
Fig. 1 is a block diagram of a gas proportional valve drive circuit showing one embodiment of the present invention, Fig. 2 is a circuit configuration diagram, and Fig. 3 is a block diagram of a gas proportional valve drive circuit showing an embodiment of the present invention.
The figure is a graph showing the relationship between the proportional valve current of each gas type and the output gas pressure by the circuit of the present invention, Figure 4 is a circuit configuration diagram of a conventional gas proportional valve drive circuit, Figures 5 and 6
The figure is an explanatory diagram explaining the reason why pattern deviation occurs in a conventional gas proportional valve drive circuit. Figures 7 and 8 show the state of pattern deviation caused by circuit variations in a conventional gas proportional valve drive circuit. The explanatory diagram, FIG. 9, is a graph showing the relationship between the proportional valve current of various gases and the output gas in a conventional gas proportional valve drive circuit. A: F-i pattern correction circuit, B: minimum current addition circuit, C: proportional valve applied voltage circuit, D: proportional valve.
Claims (1)
ガス圧の比例曲線の傾きを修正するＦ−ｉパター
ン修正回路と、ガス比例弁をその有効比例ガス圧
における最低ガス圧を供給するのに要する所定の
最低電流相当の電圧を作り出すミニマム電流付加
回路と、上記Ｆ−ｉパターン修正回路とミニマム
電流付加回路を足し合わせる比例弁印加電圧回路
とを備えることを特徴とする給湯機のガス比例弁
駆動回路。1 F-i pattern correction circuit that corrects the slope of the proportional curve of current and gas pressure applied to the gas proportional valve in the drive circuit, and the F-i pattern correction circuit that corrects the slope of the proportional curve of the current applied to the gas proportional valve and the gas pressure required to supply the minimum gas pressure in the gas proportional valve's effective proportional gas pressure. A gas proportional valve drive for a water heater characterized by comprising a minimum current addition circuit that generates a voltage equivalent to a predetermined minimum current, and a proportional valve application voltage circuit that adds the F-i pattern correction circuit and the minimum current addition circuit. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61017266A JPS62175516A (en) | 1986-01-28 | 1986-01-28 | Driving device for gas proportional valve in hot water supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61017266A JPS62175516A (en) | 1986-01-28 | 1986-01-28 | Driving device for gas proportional valve in hot water supplier |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21370391A Division JPH055518A (en) | 1991-08-26 | 1991-08-26 | Regulating method of drive of gas proportional valve of water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62175516A JPS62175516A (en) | 1987-08-01 |
| JPH0247653B2 true JPH0247653B2 (en) | 1990-10-22 |
Family
ID=11939162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61017266A Granted JPS62175516A (en) | 1986-01-28 | 1986-01-28 | Driving device for gas proportional valve in hot water supplier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62175516A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0726721Y2 (en) * | 1987-01-30 | 1995-06-14 | 株式会社ノーリツ | Proportional control device such as water heater |
| JPH01118020A (en) * | 1987-10-30 | 1989-05-10 | Rinnai Corp | Combustion control device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58678A (en) * | 1981-06-23 | 1983-01-05 | Matsushita Electric Ind Co Ltd | Solenoid proportional valve driving circuit |
-
1986
- 1986-01-28 JP JP61017266A patent/JPS62175516A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58678A (en) * | 1981-06-23 | 1983-01-05 | Matsushita Electric Ind Co Ltd | Solenoid proportional valve driving circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62175516A (en) | 1987-08-01 |
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