JPH06117625A - Fan control method for burner and fan for burner - Google Patents
Fan control method for burner and fan for burnerInfo
- Publication number
- JPH06117625A JPH06117625A JP26351092A JP26351092A JPH06117625A JP H06117625 A JPH06117625 A JP H06117625A JP 26351092 A JP26351092 A JP 26351092A JP 26351092 A JP26351092 A JP 26351092A JP H06117625 A JPH06117625 A JP H06117625A
- Authority
- JP
- Japan
- Prior art keywords
- blower
- fan
- air
- load
- combustion
- 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.)
- Pending
Links
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本願発明は、ガス給湯機等の燃焼
機器に用いる送風機の制御方法と装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower control method and apparatus used for combustion equipment such as a gas water heater.
【0002】[0002]
【従来の技術】図2に従来の給湯機の正面図、図3に側
面図を示す。こられに示すように、給湯機は複数のバー
ナ1とバーナ1を収納するためのバーナ室2、燃焼室
3、熱交換室4、排気室5、及び送風機6で構成されて
いる。燃料ガス7は燃料流量調節弁8を通り、マニホー
ルド9へ導かれ、各バーナ1の内部へ噴射される。燃料
用空気10は送風機6により供給され、バーナ1に火炎
が形成されて完全燃焼する。燃焼により発生した高温の
燃焼ガス11は熱交換器4に入り、水12を加熱する。
温度の低下した燃焼ガス11は、排ガス13となり、排
気室5から外部へ放出される。従来は、送風機6と燃料
流量調節弁8に印加される各制御電圧は図6に示すよう
に、燃焼量に対応して、最大から最小まで所定の値とな
るように決められており、また、送風機6は印加電圧が
一定になるようにする電圧制御や、回転数が一定になる
ようにする回転数制御が行われていた。2. Description of the Related Art FIG. 2 shows a front view of a conventional water heater, and FIG. 3 shows a side view thereof. As shown therein, the water heater comprises a plurality of burners 1, a burner chamber 2 for housing the burners 1, a combustion chamber 3, a heat exchange chamber 4, an exhaust chamber 5, and a blower 6. The fuel gas 7 passes through the fuel flow rate control valve 8, is guided to the manifold 9, and is injected into each burner 1. The fuel air 10 is supplied by the blower 6, and a flame is formed in the burner 1 to completely burn it. The high temperature combustion gas 11 generated by combustion enters the heat exchanger 4 and heats the water 12.
The combustion gas 11 having the lowered temperature becomes the exhaust gas 13 and is discharged from the exhaust chamber 5 to the outside. Conventionally, each control voltage applied to the blower 6 and the fuel flow rate control valve 8 is determined to have a predetermined value from the maximum to the minimum according to the combustion amount, as shown in FIG. The blower 6 has been subjected to voltage control to keep the applied voltage constant and rotation speed control to keep the rotation speed constant.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような電圧制御及び回転数制御では、図4に示すような
送風機風量Qと吐出圧P及び回転数Nの関係を示す特性
図において、以下のような課題を有していた。電圧制御
では、燃焼作動点Aは、排気口に風圧がかかるような外
乱の時にはBに移動し、風量はQAからQBに減少するた
め、燃焼性能は悪化する。また、回転数はNAからNBま
で上昇するため、回転数制御においてはNBからNCに回
転数を戻そうと送風機印加電圧をV1からV2に下げるた
め、P−Q特性はP(V1)からP(V2)に移る。その
結果、更にQCまで減少することになり、燃焼性能は更
に悪化することになる。However, in the voltage control and the rotation speed control as described above, in the characteristic diagram showing the relationship between the blower air volume Q and the discharge pressure P and the rotation speed N as shown in FIG. There was such a problem. In voltage control, the combustion operating point A moves to B in the case of a disturbance in which wind pressure is applied to the exhaust port, and the air volume decreases from QA to QB, so the combustion performance deteriorates. Further, since the rotation speed increases from NA to NB, in the rotation speed control, the blower applied voltage is reduced from V 1 to V 2 in order to return the rotation speed from NB to NC, so that the P-Q characteristic is P (V 1 ) To P (V 2 ). As a result, the QC is further reduced, and the combustion performance is further deteriorated.
【0004】[0004]
【課題を解決するための手段】燃焼用空気をバーナに導
く送風機と、その時の燃焼必要空気量に応じて送風機を
制御すべく前記送風機へ電圧を印加する送風機制御手段
とを備えたものにおいて、前記送風機より発する回転数
に比例したパルス信号と前記送風機に印加される電圧か
ら、送風機にかかる負荷量を求める負荷量監視手段を備
えると共に、前記送風機に印加される電圧を、前記負荷
量に対応する値に補正する制御手段を有することを特徴
とする。According to the present invention, there is provided a blower for guiding combustion air to a burner, and a blower control means for applying a voltage to the blower so as to control the blower according to a required combustion air amount at that time. With a load amount monitoring means for obtaining a load amount applied to the blower from a pulse signal proportional to the number of rotations generated from the blower and a voltage applied to the blower, the voltage applied to the blower corresponds to the load amount. It has a control means for correcting the value to
【0005】[0005]
【実施例】以下、本発明の一実施例を、図面にもとずい
て説明する。図1は本発明の一実施例の送風機制御シス
テムである。6は送風機、14は直流電源を含む送風機
制御手段、15は送風機6への印加電圧、16は送風機
6より回転数に比例して発生するパルス信号、17は送
風機6にかかる負荷量を監視する負荷量監視手段であ
る。負荷量は送風機回転数と印加電圧により一意的に決
まるので、負荷量監視手段17は、パルス信号16(P
L)と送風機6の印加電圧(VF)より、送風機6への
負荷量(W)を、実験等によりあらかじめ決められた関
数W=f(PL、VF)により求める。次に図5に送風
機からの風量(Q)と吐出圧(P)及び回転数(N)の
特性図を示し、以下、本発明の動作を図5に基づいて説
明する。電圧制御の場合、排気口5に風が吹き込む等の
外乱が加わると、燃焼作動点AはBに移動するので風量
はQAからQBに減少し、回転数はNAからNBへ増加す
る。この時、負荷量監視手段17は、前記関数W=f
(PL、VF)により負荷量(W)を求める。送風機制
御手段14は、それを受けて、送風機6への印加電圧V
1を、やはり実験的に求められたWに対応した値V3に補
正し、V3を送風機6に印加することにより、回転数は
NBからNDに増加し、風量はQBからQAまで回復するこ
とになり、燃焼性能上、適切な風量を確保することがで
きる。なお、本実施例においても、電圧制御の場合につ
いて述べたが、回転数制御においても、関数W=f(P
L、VF)を実験等によって決めることにより、同様な
効果が得られる。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a blower control system according to an embodiment of the present invention. 6 is a blower, 14 is a blower control means including a DC power source, 15 is a voltage applied to the blower 6, 16 is a pulse signal generated by the blower 6 in proportion to the rotation speed, and 17 is a load amount applied to the blower 6. It is a load amount monitoring means. Since the load amount is uniquely determined by the blower rotation speed and the applied voltage, the load amount monitoring means 17 causes the pulse signal 16 (P
L) and the applied voltage (VF) to the blower 6, the load amount (W) on the blower 6 is obtained by a function W = f (PL, VF) predetermined by experiments or the like. Next, FIG. 5 shows a characteristic diagram of the air volume (Q) from the blower, the discharge pressure (P), and the rotation speed (N). Hereinafter, the operation of the present invention will be described with reference to FIG. In the case of voltage control, when a disturbance such as blowing of air into the exhaust port 5 is applied, the combustion operating point A moves to B, so the air volume decreases from QA to QB and the rotation speed increases from NA to NB. At this time, the load monitoring means 17 determines that the function W = f.
The load amount (W) is calculated from (PL, VF). The blower control means 14 receives it, and the applied voltage V to the blower 6 is V.
By correcting 1 to a value V 3 which also corresponds to W experimentally obtained and applying V 3 to the blower 6, the rotation speed is increased from NB to ND and the air volume is recovered from QB to QA. Therefore, it is possible to secure an appropriate air volume in terms of combustion performance. Although the voltage control has been described in the present embodiment as well, the function W = f (P
Similar effects can be obtained by determining L, VF) by experiments or the like.
【0006】[0006]
【発明の効果】本発明によれば、送風機の制御方法とし
て、送風機にかかる負荷量を求めるための負荷量監視手
段を用いて、送風機への印加電圧を補正することによ
り、燃焼性能上、適切な送風機からの風量を確保するこ
とができる。即ち、給湯機の給湯能力範囲を拡大し、使
い勝手の向上が図れる。According to the present invention, as a method for controlling a blower, a load amount monitoring means for determining a load amount applied to the blower is used to correct the voltage applied to the blower, which is suitable for combustion performance. It is possible to secure a sufficient amount of air from a blower. That is, it is possible to expand the hot water supply capacity range of the water heater and improve the usability.
【図1】本発明の一実施例を示す送風機制御方法のブロ
ック図である。FIG. 1 is a block diagram of a blower control method according to an embodiment of the present invention.
【図2】本発明の一実施例に用いた給湯機を示す正面図
である。FIG. 2 is a front view showing a water heater used in an embodiment of the present invention.
【図3】本発明の一実施例に用いた給湯機を示す側面図
である。FIG. 3 is a side view showing a water heater used in an embodiment of the present invention.
【図4】従来の制御を説明するための、従来例の送風機
からの風量と吐出圧、回転数の関係を示す線図である。FIG. 4 is a diagram showing a relationship between an air volume from a blower of a conventional example, a discharge pressure, and a rotation speed, for explaining conventional control.
【図5】本発明の一実施例の送風機からの風量と吐出
圧、回転数の関係を示す線図である。FIG. 5 is a diagram showing the relationship between the air flow rate from the blower of one embodiment of the present invention, the discharge pressure, and the rotation speed.
【図6】従来例の燃焼量と燃料流量調節弁の開度、送風
機制御電圧との関係を示す線図である。FIG. 6 is a diagram showing a relationship between a combustion amount, an opening of a fuel flow rate control valve, and a blower control voltage in a conventional example.
1.バーナ 2.バーナ室 3.燃焼室 4.熱交換器 5.排気室 6.送風機 7.燃料ガス 8.燃料流量
調節弁 9.マニホルド 10.燃料用
空気 11.燃料ガス 12.水 13.排ガス 14.送風機
制御手段 15.印加電圧 16.パルス
信号 17.負荷量監視手段1. Burner 2. Burner room 3. Combustion chamber 4. Heat exchanger 5. Exhaust chamber 6. Blower 7. Fuel gas 8. Fuel flow control valve 9. Manifold 10. Fuel air 11. Fuel gas 12. Water 13. Exhaust gas 14. Blower control means 15. Applied voltage 16. Pulse signal 17. Load monitoring means
Claims (2)
時の燃焼必要空気量に応じて送風機を制御すべく前記送
風機へ電圧を印加する燃焼機器用送風機の制御方法にお
いて、前記送風機より発する回転数に比例したパルス信
号と前記送風機に印加される電圧から、送風機にかかる
負荷量を求めると共に、前記送風機に印加される電圧
を、前記負荷量に対応する値に補正することを特徴とす
る送風機の制御方法。1. A blower for guiding combustion air to a burner, and a method for controlling a blower for a combustion device in which a voltage is applied to the blower so as to control the blower in accordance with a required air volume for combustion at that time, a rotation generated from the blower. A blower characterized by obtaining a load amount applied to the blower from a pulse signal proportional to the number and a voltage applied to the blower, and correcting the voltage applied to the blower to a value corresponding to the load amount. Control method.
時の燃焼必要空気量に応じて送風機を制御すべく前記送
風機へ電圧を印加する送風機制御手段とを備えた燃焼機
器用送風機において、前記送風機より発する回転数に比
例したパルス信号を作る手段と、そのパラス信号と前記
送風機に印加される電圧から送風機にかかる負荷量を求
める負荷量監視手段を備えると共に、前記送風機に印加
される電圧を、前記負荷量に対応する値に補正する手段
を備えたことを特徴とする燃焼機器用送風機。2. A blower for a combustion device, comprising: a blower for introducing combustion air to a burner; and a blower control means for applying a voltage to the blower to control the blower according to a required combustion air amount at that time. A means for producing a pulse signal proportional to the number of revolutions emitted from the blower, and a load amount monitoring means for obtaining the load amount applied to the blower from the pulse signal and the voltage applied to the blower are provided, and the voltage applied to the blower is A blower for a combustion device, comprising a means for correcting the value corresponding to the load amount.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26351092A JPH06117625A (en) | 1992-10-01 | 1992-10-01 | Fan control method for burner and fan for burner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26351092A JPH06117625A (en) | 1992-10-01 | 1992-10-01 | Fan control method for burner and fan for burner |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06117625A true JPH06117625A (en) | 1994-04-28 |
Family
ID=17390534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26351092A Pending JPH06117625A (en) | 1992-10-01 | 1992-10-01 | Fan control method for burner and fan for burner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06117625A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0747632A2 (en) * | 1995-06-09 | 1996-12-11 | Texas Instruments Incorporated | Induced draft fan control for use with gas furnaces |
-
1992
- 1992-10-01 JP JP26351092A patent/JPH06117625A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0747632A2 (en) * | 1995-06-09 | 1996-12-11 | Texas Instruments Incorporated | Induced draft fan control for use with gas furnaces |
EP0747632A3 (en) * | 1995-06-09 | 1997-09-10 | Texas Instruments Inc | Induced draft fan control for use with gas furnaces |
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