JP2990665B2 - Water heater - Google Patents
Water heaterInfo
- Publication number
- JP2990665B2 JP2990665B2 JP9242422A JP24242297A JP2990665B2 JP 2990665 B2 JP2990665 B2 JP 2990665B2 JP 9242422 A JP9242422 A JP 9242422A JP 24242297 A JP24242297 A JP 24242297A JP 2990665 B2 JP2990665 B2 JP 2990665B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat exchange
- heat
- hot water
- 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.)
- Expired - Fee Related
Links
Landscapes
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は給湯装置に関し、特
に、熱交換器とそれを加熱するバーナとを有し、バーナ
の連続燃焼のみではなく、必要に応じてはバーナのオン
オフ燃焼制御により希望の設定温の温水を得る給湯装置
の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply apparatus, and more particularly, to a hot water supply apparatus having a heat exchanger and a burner for heating the heat exchanger. The present invention relates to an improvement of a hot water supply apparatus for obtaining hot water having a set temperature.
【０００２】[0002]
【従来の技術】瞬間式熱交換器とこれを加熱するバーナ
を備え、通常はバーナを燃焼させ続けた状態で出湯温So
utがその時に設定されている設定温Ssetとなるように燃
焼量を比例制御するが、設定温Ssetが比較的低く設定さ
れた結果、出湯温Soutを設定温Ssetとするためにその時
に要求される必要燃焼熱量Fdemが、バーナを最低の燃焼
量で燃焼させたとしてもその時に得られてしまう熱量よ
り下回る場合には、バーナを連続燃焼させるのを止め、
最低燃焼量でオンオフさせる給湯装置がある。もちろ
ん、バーナの「オン」とはバーナが燃焼していることで
あり、「オフ」とは消火されていることであるが、ここ
ではフィードフォワード制御が採られ、予め定めた一定
温度未満の給湯温度が設定されると、当該設定温Ssetと
入水温Sin、そして熱交換器内を流れる流量Fwとから、設
定温での給湯を行うために必要な必要燃焼熱量Fdem（＝
（Sset−Sin)Fw）が演算され、さらにその必要燃焼熱量
から、所定の周期ごとにこれを得るために必要な燃焼オ
ン時間t1と燃焼オフ時間t2が演算され、バーナはその結
果に従って燃焼のオンオフを繰返す。2. Description of the Related Art An instantaneous heat exchanger and a burner for heating the heat exchanger are provided.
The combustion amount is proportionally controlled so that ut becomes the set temperature Sset set at that time.However, as the set temperature Sset is set relatively low, it is required at that time to set the tapping temperature Sout to the set temperature Sset. If the required combustion calorie Fdem is lower than the calorie that can be obtained even if the burner is burned at the lowest burning amount, stop burning the burner continuously,
There is a hot water supply device that is turned on and off with the minimum combustion amount. Of course, “on” of the burner means that the burner is burning, and “off” means that the fire has been extinguished. Here, feedforward control is employed, and hot water supply at a temperature lower than a predetermined fixed temperature is adopted. When the temperature is set, the necessary combustion heat amount Fdem (==) required to supply hot water at the set temperature is obtained from the set temperature Sset, the input water temperature Sin, and the flow rate Fw flowing through the heat exchanger.
(Sset−Sin) Fw) is calculated, and from the required amount of combustion heat, a combustion on time t1 and a combustion off time t2 required to obtain the same are calculated for each predetermined cycle. Repeat on / off.
【０００３】これに対し、演算により予めオン時間t1や
オフ時間t2を決めるのではなく、熱交換器の途中に温度
検出器を設け、この温度検出器の検出温度Sdetでオンオ
フの判定を行い、判定温度Sdecよりも実際の検出温度Sd
etが高くなるとバーナをオフにし、下回ると再びオンに
するという方式もある。この場合の判定温度Sdecは、制
御開始時には設定温度Ssetとしておき、オンオフ燃焼を
繰り返し行う間に、実際の出湯温度Soutを監視してお
き、これを平均した温度と設定温度Ssetとの差の数％を
判定温度Sdecに加算して新たな判定温度Sdecとし、これ
を境にしての実質的なオンオフフィードバック制御を行
うようになっている。[0003] On the other hand, a temperature detector is provided in the middle of a heat exchanger instead of determining the on time t1 and the off time t2 in advance by calculation, and the on / off determination is performed based on the detected temperature Sdet of the temperature detector. Actual detection temperature Sd rather than judgment temperature Sdec
There is also a method in which the burner is turned off when et becomes high, and turned on again when et becomes low. The determination temperature Sdec in this case is set as the set temperature Sset at the start of the control, and the actual tapping temperature Sout is monitored during repeated on-off combustion, and the difference between the averaged temperature and the set temperature Sset is calculated. % Is added to the determination temperature Sdec to obtain a new determination temperature Sdec, and substantial ON / OFF feedback control is performed on the basis of the new determination temperature Sdec.
【０００４】[0004]
【発明が解決しようとする課題】ところが、最初に述べ
た従来法では、燃焼オン時間t1のカウント開始時刻は燃
焼部に取り付けられた炎検知器による炎検知時としてい
るため、バーナ着火から炎検知に至るまでの時間は燃焼
がなされているにも拘らず、燃焼オン時間t1の中には入
っていなかった。そのため、正確な温度制御は必ずしも
できず、そうかと言って、着火から炎検知までの時間は
その度毎に異なるのが普通なので、これを一定時間とし
て予め見込んでおくこともできなかった。しかも通常、
着火時は燃焼入力を高めにして着火を行うので、結局、
熱量が過剰となって、実際の給湯温度が設定温を越えて
しまいがちだった。また、フィードフォワードでの制御
となるため、径年変化などにより、熱交換効率が変化し
た際にもこれに対応できず、設定温での出湯が得られな
くなる欠点があった。However, in the above-mentioned conventional method, the counting start time of the combustion ON time t1 is the time of flame detection by the flame detector attached to the combustion part. Despite the fact that the combustion was being performed, the time up to was not included in the combustion on time t1. For this reason, accurate temperature control is not always possible, but the time from ignition to flame detection usually differs each time, so that it was not possible to anticipate this as a fixed time in advance. And usually,
At the time of ignition, ignition is performed with a higher combustion input, so after all,
The amount of heat was excessive, and the actual hot water temperature tended to exceed the set temperature. In addition, since control is performed by feed forward, it is not possible to cope with a change in heat exchange efficiency due to a change in diameter or the like, and there is a drawback that tapping at a set temperature cannot be obtained.
【０００５】これに対し、判定温度でのオンオフ制御を
行う従来の第二の方法でも、当然のことながら、熱交換
器の途中に設けた温度検出器よりも下流側の熱量が過剰
となり、出湯温度のハンチングを大きくする原因となっ
ていた。出湯温によるフィードバックを掛けてはいる
が、温度差の何％をフィードバックして良いのかを認識
する術がなく、徐々にフィードバックすることとなり、
出湯温度が収束するまでの時間が非常に長くなる欠点を
有していた。On the other hand, in the second conventional method of performing on / off control at the determination temperature, the amount of heat downstream of the temperature detector provided in the middle of the heat exchanger becomes excessive, as a matter of course. This caused the temperature hunting to increase. Although the feedback by the hot water temperature is applied, there is no way to recognize what percentage of the temperature difference should be fed back.
There is a disadvantage that the time until the tapping temperature converges becomes extremely long.
【０００６】[0006]
【課題を解決するための手段】本発明では上記課題を解
決するため、熱交換器とそれを加熱するバーナとを有
し、その時に必要な必要燃焼熱量がバーナの連続燃焼で
の最低燃焼熱量を下回った時にはバーナをオンオフする
ことで制御する給湯装置において、熱交換器内の流路途
中に温度センサを設け、この温度センサを境にしてその
上流と下流とに熱交換器が二つ有ると考える。ここで、
入水口から温度センサまでの上流側を第一熱交換部、温
度センサから出湯口までの下流側を第二熱交換部とする
ならば、予め設計段階で求め得る第一、第二熱交換部の
熱交換効率の比により、設定温の出湯を得るために必要
な必要燃焼熱量を分割して上流側の第一熱交換部で得る
べき熱量を求め、算出した熱量でその時の流量における
上昇温度を求め、これに入水温を加算した温度を判定温
度とする。そして、熱交換器途中の温度センサの検出す
る検出温度が当該判定温度を越えた時にはバーナをオ
フ、下回った時にはオンとする。According to the present invention, in order to solve the above-mentioned problems, a heat exchanger and a burner for heating the heat exchanger are provided, and the required combustion heat quantity at that time is the minimum combustion heat quantity in the continuous combustion of the burner. In the hot water supply device that controls by turning on and off the burner when the temperature falls below, a temperature sensor is provided in the middle of the flow path in the heat exchanger, and there are two heat exchangers upstream and downstream of this temperature sensor as a boundary Think. here,
If the upstream side from the water inlet to the temperature sensor is the first heat exchange section, and the downstream side from the temperature sensor to the hot water outlet is the second heat exchange section, the first and second heat exchange sections that can be obtained in the design stage in advance The required amount of combustion heat required to obtain hot water at the set temperature is divided by the heat exchange efficiency ratio to determine the amount of heat to be obtained in the first heat exchange section on the upstream side, and the calculated heat amount increases the temperature at the flow rate at that time. Is obtained, and the temperature obtained by adding the incoming water temperature to this is set as the judgment temperature. The burner is turned off when the temperature detected by the temperature sensor in the middle of the heat exchanger exceeds the determination temperature, and turned on when the temperature falls below the determination temperature.
【０００７】このような基本構成の下、本発明の下位態
様においては、第一、第二の熱交換器効率の比を、その
時々の流量に応じて予め求めておいた値を用いる構成
や、これに加えて、あるいはこれに代えて、その時々の
必要燃焼熱量に応じて予め求めておいた値を用いる構成
も提案する。第一、第二熱交換部の熱交換効率の比は、
必ずしも常に一定ではなく、流量やその時々の燃焼量に
より変わることがあり得ることが、本発明者の研究によ
り分かったからである。Under such a basic configuration, in a lower aspect of the present invention, there is provided a configuration in which the ratio between the first and second heat exchanger efficiencies is determined in advance according to the flow rate at each time. In addition, a configuration using a value obtained in advance in accordance with the required amount of combustion heat at each time is proposed. The ratio of the heat exchange efficiency of the first and second heat exchange units is
This is because the research by the present inventor has found that it is not always constant and may vary depending on the flow rate and the amount of combustion at each time.
【０００８】また、実際の出湯温を検出して、その平均
に基づき判定温度を補正するフィードバック制御を採用
することもできるし、さらには、設定温、入水温、流
量、実際の出湯温、及び熱交換器内の流路途中に設けた
温度センサの検出温度により、予め求めておいた第一、
第二熱交換部の熱交換効率の比を補正、更新することも
提案する。これはいわゆる学習補正であり、径年変化等
により第一、第二熱交換部の熱交換効率比が変化した場
合においても正確な出湯を行うことが出来る。補正、更
新された熱交換効率比データを不揮発性メモリに格納し
ておけば、停電等が発生しても、電源を再投入した後に
は常に最新の情報を用いるようにすることができる。Further, it is possible to employ feedback control for detecting the actual tap water temperature and correcting the judgment temperature based on the average, and furthermore, a set temperature, an incoming water temperature, a flow rate, an actual tap water temperature, and First, previously determined by the detection temperature of the temperature sensor provided in the middle of the flow path in the heat exchanger,
It is also proposed to correct and update the ratio of the heat exchange efficiency of the second heat exchange section. This is a so-called learning correction, and accurate tapping can be performed even when the heat exchange efficiency ratio of the first and second heat exchange units changes due to a change in diameter or the like. If the corrected and updated heat exchange efficiency ratio data is stored in the non-volatile memory, the latest information can always be used after the power is turned on again even if a power failure or the like occurs.
【０００９】本発明のまた別な態様によると、判定温度
の算出は簡略化することもできる。すなわち、その時に
設定されている設定温から入水温を減算し、この値（必
要な上昇温度）を第一、第二熱交換部の熱交換効率比に
応じて分割し、第一の熱交換部にて上昇させるべき温度
を求め、この温度に入水温を加算した温度値を判定温度
とすることも提案する。According to another aspect of the present invention, the calculation of the determination temperature can be simplified. That is, the incoming water temperature is subtracted from the set temperature set at that time, and this value (necessary rising temperature) is divided according to the heat exchange efficiency ratio of the first and second heat exchange sections, and the first heat exchange It is also proposed to determine the temperature to be raised in the section, and to use the temperature value obtained by adding the incoming water temperature to this temperature as the determination temperature.
【００１０】[0010]
【発明の実施の形態】図１には、本発明の適用を受ける
ことのできる装置構成例として、住宅設備用の給湯機に
おけるオイルを燃料とするシステムの概略が示されてい
る。ただし、燃料供給系統の機構的な相違は若干ある
が、燃料はガスに直接置き換えても別段構わない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a system using oil as a fuel in a water heater for housing equipment as an example of an apparatus configuration to which the present invention can be applied. However, although there are some mechanical differences in the fuel supply system, the fuel may be directly replaced with gas.
【００１１】主たる制御回路31には、設定温度を指示す
るリモートコントローラ（以下、リモコン）34が接続さ
れ、使用者は、このリモコン34の図示しない設定温度変
更手段により、希望する出湯温である設定温Ssetを選択
できるようになっており、図示しない蛇口が開かれる等
により、流量センサ22が入水路21を介しての通水を検出
し、その旨を制御回路31に伝えると、制御回路31は電磁
弁18に通電して図示しないオイルタンクに接続している
燃料経路を開き、同時にポンプ16にも通電してオイルを
加圧する。この時、比例弁17には、バーナに着火するの
に必要なオイル流量となる開度を指示する電流を与え、
一方でファンモータ15を駆動し、着火時に適当なる空気
量を燃焼室12内に供給する。この状態で、制御回路31は
図示しない着火装置を駆動し、これによりバーナノズル
13から噴出するオイルに着火し、燃焼室12内での燃焼が
開始する。A main controller 31 is connected to a remote controller (hereinafter referred to as a remote controller) 34 for instructing a set temperature. The user can set a desired tap water temperature by a set temperature changing means (not shown) of the remote controller 34. The temperature Sset can be selected, and when a faucet (not shown) is opened or the like, the flow rate sensor 22 detects water flow through the water inlet channel 21 and notifies the control circuit 31 of that fact. Energizes the solenoid valve 18 to open a fuel path connected to an oil tank (not shown), and simultaneously energizes the pump 16 to pressurize the oil. At this time, the proportional valve 17 is supplied with a current indicating an opening degree that is an oil flow rate necessary for igniting the burner,
On the other hand, the fan motor 15 is driven to supply an appropriate amount of air into the combustion chamber 12 at the time of ignition. In this state, the control circuit 31 drives an ignition device (not shown), thereby
The oil spouted from 13 ignites, and combustion in combustion chamber 12 starts.
【００１２】燃焼が開始されると、制御回路31中の演算
記憶回路32は、サーミスタ等により構成される入水温セ
ンサ23により入水温Sin を検出し、この入水温Sin と、
使用者により設定された設定温Ssetと、流量センサ22の
検出する流量Fwとから、その時に必要な必要燃焼熱量Fd
emを次式により算出する。 必要燃焼熱量Fdem＝（設定温Sset−入水温Sin)×流量FwWhen the combustion is started, an arithmetic storage circuit 32 in the control circuit 31 detects an incoming water temperature Sin by an incoming water temperature sensor 23 constituted by a thermistor or the like, and this incoming water temperature Sin and
From the set temperature Sset set by the user and the flow rate Fw detected by the flow rate sensor 22, the necessary combustion heat amount Fd required at that time is obtained.
Calculate em by the following formula. Required combustion heat quantity Fdem = (Set temperature Sset-Inlet water temperature Sin) x Flow rate Fw
【００１３】これに基づき、制御回路31は、バーナノズ
ル13より噴出するオイルが必要燃焼熱量Fdemを得るに適
当なる量にすべく比例弁17に供給する電流を調整して弁
開度を整え、同時にファンモータ15への供給電力も調整
して燃焼室12内に必要燃焼熱量に必要な空気量を送給す
る。こうした調整を伴いながら燃焼が行われると、入水
路21に入力してきた水は熱交換器11を通過する間に熱せ
られ、サーミスタ等により構成される出湯温センサ24に
より出湯温度が監視されながら、出湯口から出湯されて
行く。制御回路31ないしその演算記憶回路32は、出湯温
センサ24から得られる実際の出湯温Soutと使用者の設定
した設定温Ssetとを比較し、これらの間に差が生じてい
ると、出湯温Soutを設定温度とすべく、その差を埋める
ように比例弁電流及びファンモータ回転数を帰還制御
し、燃焼熱量を調整する。なお、出湯部にはまた、一般
に混合器25も設けられるが、これは例えば、出湯が止め
られた後、余り間を置かずに再度出湯が開始した時等、
止められている間の燃焼室内の予熱で加熱された結果、
設定温より高温の湯が供給されそうな時に、入水路21か
らの水を混ぜて、その湯温を下げる目的に使用される。
通常の制御時には使用されず、従って必須のものではな
い。Based on this, the control circuit 31 adjusts the current supplied to the proportional valve 17 so that the oil spouted from the burner nozzle 13 has an appropriate amount to obtain the required combustion heat amount Fdem, and adjusts the valve opening degree. The power supplied to the fan motor 15 is also adjusted to supply the required amount of combustion heat to the combustion chamber 12 with the required amount of air. When the combustion is performed with such adjustment, the water input to the water inlet 21 is heated while passing through the heat exchanger 11, and while the tap water temperature is monitored by a tap water temperature sensor 24 constituted by a thermistor or the like, Hot water is taken from the hot spring outlet. The control circuit 31 or its arithmetic storage circuit 32 compares the actual tapping temperature Sout obtained from the tapping temperature sensor 24 with the set temperature Sset set by the user. In order to keep Sout at the set temperature, feedback control is performed on the proportional valve current and the fan motor speed so as to bridge the difference, and the amount of combustion heat is adjusted. In addition, the tapping section is also generally provided with a mixer 25, which is, for example, when tapping is stopped, and when tapping is started again without leaving too much time.
As a result of being heated by preheating in the combustion chamber while it is stopped,
When hot water having a temperature higher than the set temperature is likely to be supplied, the water from the water inlet 21 is mixed to reduce the temperature of the hot water.
It is not used during normal control and is therefore not essential.
【００１４】設定温Ssetが比較的高く、必要燃焼熱量Fd
emが比較的大きい範囲では、上記のように通常の連続燃
焼制御モードとなる。これに対し、必要燃焼熱量Fdemが
バーナの最低燃焼熱量を下回った場合には、バーナでの
燃焼自体をオンオフするオンオフ制御モードに移行す
る。そして、このオンオフ制御モード下においてバーナ
のオンオフ切り換えをどのような判断基準に従ってなす
のかが、本発明の適用される部分である。The set temperature Sset is relatively high, and the required combustion heat quantity Fd
In the range where em is relatively large, the normal continuous combustion control mode is set as described above. On the other hand, when the required combustion heat amount Fdem is lower than the minimum combustion heat amount of the burner, the mode shifts to an on / off control mode for turning on / off the combustion itself in the burner. In this on / off control mode, what criteria are used to switch the burner on / off is a part to which the present invention is applied.
【００１５】燃焼オンオフの判定は、熱交換器11の途中
に設けたサーミスタ等による温度センサ14の検出温度Sm
idを用いて行う。この温度センサ14は、熱交換器11の中
間に設けられているので、ここでは「中間温センサ」と
名付け、その検出温度は「中間温Smid」と呼ぶ。しかる
に、本発明ではまず、熱交換器11は、中間温センサ14を
境にしてその上流部分と下流部分の二つの部分から成っ
ていると見る。The determination of combustion on / off is made by detecting the temperature Sm detected by the temperature sensor 14 using a thermistor or the like provided in the middle of the heat exchanger 11.
This is performed using id. Since the temperature sensor 14 is provided in the middle of the heat exchanger 11, the temperature sensor 14 is named “intermediate temperature sensor” and the detected temperature is called “intermediate temperature Smid”. However, in the present invention, first, it is considered that the heat exchanger 11 is composed of two parts, an upstream part and a downstream part, with the intermediate temperature sensor 14 as a boundary.
【００１６】そして、入水口から中間温センサ14までの
間に位置する上流側を第一熱交換部11-1、中間温センサ
14から出湯口までの間に位置する下流側を第二熱交換部
11-2とするならば、予め設計段階で求め得る第一、第二
熱交換部11-1，11-2の熱交換効率の比（x:(1-x), 0<x<
1) により、入水温センサ23の検出する入水温Sin、流量
センサ22の検出する流量Fw、そして設定温Ssetに基づ
き、当該設定温Ssetの出湯を得るために必要として算出
されるその時々の必要燃焼熱量Fdemを分割して、演算記
憶回路32により上流側の第一熱交換部11-1で得るべき燃
焼熱量Fdem×x を求める。次に、逆にこの熱量Fdem×x
でその時の流量Fwにおける予想される上昇温度を求め、
これに入水温Sin を加算した温度を判定温度Sdecとす
る。The upstream side located between the water inlet and the intermediate temperature sensor 14 is the first heat exchange section 11-1,
The second heat exchange section is located downstream from 14 to the tap.
If it is 11-2, the ratio of the heat exchange efficiency of the first and second heat exchange units 11-1 and 11-2 (x: (1-x), 0 <x <
According to 1), based on the incoming water temperature Sin detected by the incoming water temperature sensor 23, the flow rate Fw detected by the flow rate sensor 22, and the set temperature Sset, the necessary time is calculated as necessary to obtain hot water at the set temperature Sset. The combustion heat amount Fdem is divided, and the operation storage circuit 32 obtains the combustion heat amount Fdem × x to be obtained in the first heat exchange unit 11-1 on the upstream side. Next, on the contrary, this calorie Fdem × x
Find the expected temperature rise at the flow rate Fw at that time,
The temperature obtained by adding the incoming water temperature Sin to this is defined as the determination temperature Sdec.
【００１７】こうして算出した判定温度Sdecと中間温セ
ンサ14の検出温度である中間温Smidとを比較し、中間温
Smidが判定温度Sdecより低い場合には燃焼をオン、高く
なった場合には燃焼オフとする。こうした制御は、熱交
換器11内を通過する水の湯温上昇傾向に最も近い判断基
準に従うもので、出湯温Soutのハンチングを最小限に抑
え、設定温Ssetの出湯を迅速に得られる点で高い効果が
ある。また、これに際し、出湯温Soutの平均値に基づ
き、判定温度Sdecをフィードバック補正するのも良い手
段である。The determined temperature Sdec thus calculated is compared with the intermediate temperature Smid detected by the intermediate temperature sensor 14, and the intermediate temperature Sdec is calculated.
When Smid is lower than the determination temperature Sdec, the combustion is turned on, and when it is higher, the combustion is turned off. Such control is based on the criterion closest to the tendency of the hot water temperature of the water passing through the heat exchanger 11 to minimize the hunting of the hot water temperature Sout and to quickly obtain hot water at the set temperature Sset. It has a high effect. In this case, it is also a good means to feedback-correct the determination temperature Sdec based on the average value of the tapping temperature Sout.
【００１８】ただ、本発明者の知見によると、熱交換器
11を分割したものと考えた第一、第二熱交換部11-1，11
-2の熱交換効率比は、必ずしも一定ではなく、流量Fwに
依存性のあることが分かっている。そこで、その時々の
設定温Ssetの出湯を得るために必要とされる必要燃焼熱
量Fdemを分割する際の上記比の値x は、予め設計段階で
各流量ごとに求めておき、その時に検出される流量Fwに
応じて適当なる値を用いるのが望ましい。However, according to the knowledge of the present inventors, the heat exchanger
First and second heat exchange units 11-1 and 11 considered as a division of 11
It has been found that the heat exchange efficiency ratio of -2 is not always constant, but depends on the flow rate Fw. Therefore, the value x of the above ratio at the time of dividing the required combustion heat quantity Fdem required to obtain the hot water of the set temperature Sset at that time is obtained in advance for each flow rate at the design stage, and detected at that time. It is desirable to use an appropriate value according to the flow rate Fw.
【００１９】同様のことはその時々の必要燃焼熱量Fdem
についても言え、燃焼室12内の予熱等の関係で、第一、
第二熱交換部11-1，11-2の熱交換効率比x は当該必要燃
焼熱量Fdemにも依存するので、それとの対応関係も設計
段階で求めておき、その時々で演算記憶回路32により必
要と計算された必要燃焼熱量Fdemに応じて適当なる熱交
換効率比値x を用いるのが良い。上記した流量依存値を
含め、こうした値は、図示しないが一般にマイクロコン
ピュータにより構成できる演算記憶回路32に付属の読み
出し専用メモリ(ROM) に格納しておいたり、後述する目
的で設けると望ましい電気的に消去及びプログラム可能
な不揮発性メモリ(EEPROM)33内に格納しておく。The same is true for the required combustion heat quantity Fdem at each time.
Regarding, the first, due to the preheating etc. in the combustion chamber 12,
Since the heat exchange efficiency ratio x of the second heat exchange units 11-1 and 11-2 also depends on the required combustion calorie Fdem, its corresponding relationship is also determined at the design stage. It is preferable to use an appropriate heat exchange efficiency ratio value x according to the required combustion calorie Fdem calculated as necessary. These values, including the flow rate dependent values described above, are stored in a read-only memory (ROM) attached to an arithmetic storage circuit 32 (not shown), which can be generally configured by a microcomputer, or are preferably provided for the purpose described later. And stored in an erasable and programmable nonvolatile memory (EEPROM) 33.
【００２０】第一、第二熱交換部11-1，11-2の熱交換効
率比の値x は、ある意味では当然のことながら、経年変
化依存性もあるが、本発明の構成はまた、そうした経年
変化にも対応し易い構成となっている。上述したオンオ
フ制御により、設定温Sset、入水温Sin、流量Fw、中間温
Smid、そして実際の出湯温Soutという所要情報に基づ
き、正しく制御している筈なのに、年月が経つに連れ、
出湯温Soutにかなりな誤差が生ずるようになることもあ
る。しかし、そうした場合でも、演算記憶回路32は、こ
の誤差が許容範囲を出た場合、逆にこれらの情報に基づ
き、第一、第二熱交換部11-1，11-2の熱交換効率比の値
x を補正することができる。そして、補正した値でそれ
までの値を更新し、望ましくは不揮発性メモリ33に書き
込むようにすれば、いわゆる学習補正となり、径年変化
等により熱交換効率比が変化した場合においても、正確
な出湯を続けることが出来る。The value x of the heat exchange efficiency ratio of the first and second heat exchange units 11-1 and 11-2 naturally depends on aging in a certain sense. The structure is easy to cope with such aging. By the above-described on / off control, the set temperature Sset, the incoming water temperature Sin, the flow rate Fw, the intermediate temperature
Based on the required information of Smid and actual hot water temperature Sout, it should have been properly controlled, but as the years passed,
A considerable error may occur in the tapping temperature Sout. However, even in such a case, if the error falls outside the allowable range, the arithmetic storage circuit 32 conversely calculates the heat exchange efficiency ratio of the first and second heat exchange units 11-1 and 11-2 based on the information. The value of the
x can be corrected. Then, by updating the previous value with the corrected value and desirably writing it to the nonvolatile memory 33, so-called learning correction is performed, and even when the heat exchange efficiency ratio changes due to a change in diameter or the like, an accurate value can be obtained. Hot water can be continued.
【００２１】もちろん、電源が落ちないことを前提にす
るのならば、学習補正値はランダムアクセスメモリに書
き込んでも良いが、停電のこと等もあるので、上述のよ
うにEEPROM33を用いるのが望ましい。停電復旧後、この
EEPROM33からデータを読み直せば、何等支障なく、使用
を継続することができる。そして、こうしたEEPROM33を
用いるのであれば、既述した熱交換効率比の値、フィー
ドバック量、学習補正値は、これらを一括してこのEEPR
OM33に格納すると良い。Of course, if it is assumed that the power will not be turned off, the learning correction value may be written in the random access memory, but it is preferable to use the EEPROM 33 as described above because of a power failure or the like. After the power outage is restored,
If the data is read again from the EEPROM 33, the use can be continued without any trouble. If such an EEPROM 33 is used, the value of the heat exchange efficiency ratio, the feedback amount, and the learning correction value described above are collectively used in this EEPROM.
It should be stored in OM33.
【００２２】なお、判定温度の計算は簡略化しても良い
こともある。すなわち、その時に設定されている設定温
Ssetから入水温Sin を減算し、この値（必要な上昇温
度）を第一、第二熱交換部11-1，11-2の熱交換効率比x:
(1-x) に応じて分割し、第一の熱交換部11-1にて上昇さ
せるべき温度を求め、この温度に入水温Sin を加算した
温度値を判定温度Sdecとすることができる。この場合に
も、既述した判定温度のフィードバック制御等は同様に
採用することができる。The calculation of the determination temperature may be simplified. That is, the set temperature set at that time
The input water temperature Sin is subtracted from Sset, and this value (the required rise temperature) is used as the heat exchange efficiency ratio x of the first and second heat exchange units 11-1 and 11-2:
The temperature is divided according to (1-x), the temperature to be raised in the first heat exchange section 11-1 is obtained, and the temperature value obtained by adding the incoming water temperature Sin to this temperature can be used as the determination temperature Sdec. Also in this case, the feedback control of the determination temperature described above can be similarly employed.
【００２３】[0023]
【発明の効果】本発明によれば、バーナのオンオフ制御
をなすに際し、出湯温のハンチングを最小限におさえ、
設定温での出湯を迅速に得ることが出来る。また、中間
温センサより下流と上流の熱交換効率比を、設定温、入
水温、流量、実際の出湯温度、及び中間温により学習補
正する構成を採用すれば、径年変化等により熱交換効率
比が変化した場合においても、正確な出湯を行うことが
出来る。According to the present invention, when performing on / off control of the burner, hunting of the tap water temperature is minimized.
Hot water at the set temperature can be obtained quickly. In addition, if a configuration is adopted in which the heat exchange efficiency ratio between the downstream and upstream of the intermediate temperature sensor is learned and corrected based on the set temperature, incoming water temperature, flow rate, actual hot water temperature, and intermediate temperature, heat exchange efficiency may change due to aging. Even when the ratio changes, accurate tapping can be performed.
【図１】本発明を住宅設備用の給湯機に適用した場合の
概略構成図である。FIG. 1 is a schematic configuration diagram in the case where the present invention is applied to a water heater for household equipment.
11 熱交換器 11-1 第一熱交換部 11-2 第二熱交換部 12 燃焼室 13 バーナノズル 14 中間温センサ 15 ファンモータ 17 比例弁 18 電磁弁 21 入水路 22 流量センサ 23 入水温センサ 24 出湯温センサ 31 制御回路 32 演算記憶回路 33 EEPROM 34 リモコン 11 Heat exchanger 11-1 First heat exchange section 11-2 Second heat exchange section 12 Combustion chamber 13 Burner nozzle 14 Intermediate temperature sensor 15 Fan motor 17 Proportional valve 18 Solenoid valve 21 Water inlet 22 Flow rate sensor 23 Water temperature sensor 24 Hot water Temperature sensor 31 Control circuit 32 Operation memory circuit 33 EEPROM 34 Remote control
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F23N 5/02 350 F23N 5/00 F24H 1/10 302 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) F23N 5/02 350 F23N 5/00 F24H 1/10 302
Claims (6)
有し、その時に必要な必要燃焼熱量がバーナの連続燃焼
での最低燃焼熱量を下回った時にはバーナをオンオフ制
御する給湯装置であって；上記熱交換器内の流路途中に
温度センサを設け、入水口から該温度センサまでの上流
側を第一熱交換部、該温度センサから出湯口までの下流
側を第二熱交換部として、該第一、第二熱交換部の熱交
換効率の比により、設定温の出湯を得るために必要な必
要燃焼熱量を分割して上記上流側の第一熱交換部で得る
べき熱量を求め、算出した熱量でその時の流量における
上昇温度を求め、これに入水温を加算した温度を判定温
度とし、該温度センサの検出温度が該判定温度を越えた
時には上記バーナをオフ、下回った時にはオンとするこ
と；を特徴とする給湯装置。1. A hot water supply apparatus comprising a heat exchanger and a burner for heating the heat exchanger, and controlling the burner to be turned on and off when a required combustion heat quantity at that time falls below a minimum combustion heat quantity in continuous burning of the burner. A temperature sensor is provided in the middle of the flow path in the heat exchanger, an upstream side from the water inlet to the temperature sensor is a first heat exchange section, and a downstream side from the temperature sensor to the outlet is a second heat exchange section. As the ratio of the heat exchange efficiency of the first and second heat exchange units, the necessary amount of combustion heat required to obtain the hot water at the set temperature is divided to obtain the heat amount to be obtained in the upstream first heat exchange unit. The temperature rise at the flow rate at that time is obtained from the calculated calorific value, and the temperature obtained by adding the incoming water temperature to the temperature is used as the determination temperature. Turn on; Hot water equipment.
有し、その時に必要な必要燃焼熱量がバーナの連続燃焼
での最低燃焼熱量を下回った時にはバーナをオンオフ制
御する給湯装置であって；上記熱交換器内の流路途中に
温度センサを設け、入水口から該温度センサまでの上流
側を第一熱交換部、該温度センサから出湯口までの下流
側を第二熱交換部として、設定温から入水温を減算し、
この値を上記第一、第二熱交換部の熱交換効率比に応じ
て分割し、該第一の熱交換部にて上昇させるべき温度を
求め、この温度に入水温を加算した温度値を判定温度と
し、上記温度センサの検出温度が該判定温度を越えた時
には上記バーナをオフ、下回った時にはオンとするこ
と；を特徴とする給湯装置。2. A hot water supply device comprising a heat exchanger and a burner for heating the heat exchanger, and controlling on / off of the burner when a required combustion heat quantity at that time falls below a minimum combustion heat quantity in the continuous combustion of the burner. A temperature sensor is provided in the middle of the flow path in the heat exchanger, an upstream side from the water inlet to the temperature sensor is a first heat exchange section, and a downstream side from the temperature sensor to the outlet is a second heat exchange section. Subtract the incoming water temperature from the set temperature,
This value is divided according to the heat exchange efficiency ratio of the first and second heat exchange sections, a temperature to be raised in the first heat exchange section is obtained, and a temperature value obtained by adding the incoming water temperature to this temperature is obtained. A hot water supply device, wherein the burner is turned off when the temperature detected by the temperature sensor exceeds the judgment temperature, and turned on when the temperature falls below the judgment temperature.
上記第一、第二熱交換部の熱交換効率比は、その時の上
記流量に応じた値を用いること；を特徴とする給湯装
置。3. Apparatus according to claim 1 or 2, wherein:
The heat exchange efficiency ratio of the first and second heat exchange units uses a value corresponding to the flow rate at that time;
て；上記第一、第二熱交換部の熱交換効率比は、その時
の上記必要燃焼熱量に応じた値を用いること；を特徴と
する給湯装置。4. The apparatus according to claim 1, wherein the heat exchange efficiency ratio of the first and second heat exchange units uses a value corresponding to the required amount of combustion heat at that time. A hot water supply device.
あって；上記熱交換器から出湯される湯の出湯温の平均
値により、上記判定温度を補正し、フィードバック制御
すること；を特徴とする給湯装置。5. The apparatus according to claim 1, wherein the determination temperature is corrected by an average value of tapping temperatures of tapping water from the heat exchanger, and feedback control is performed. A hot water supply device.
置であって；上記第一、第二熱交換部の熱交換効率比
は、上記設定温、上記入水温、上記流量、上記温度セン
サの検出温度、そして上記熱交換器から出湯される湯の
出湯温に基づき学習補正すること；を特徴とする給湯装
置。6. The apparatus according to claim 1, wherein the first and second heat exchange units have a heat exchange efficiency ratio of the set temperature, the incoming water temperature, the flow rate, Learning correction based on the temperature detected by the temperature sensor and the temperature of the hot water discharged from the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9242422A JP2990665B2 (en) | 1997-09-08 | 1997-09-08 | Water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9242422A JP2990665B2 (en) | 1997-09-08 | 1997-09-08 | Water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1183008A JPH1183008A (en) | 1999-03-26 |
| JP2990665B2 true JP2990665B2 (en) | 1999-12-13 |
Family
ID=17088885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9242422A Expired - Fee Related JP2990665B2 (en) | 1997-09-08 | 1997-09-08 | Water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2990665B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5170534B2 (en) * | 2008-02-20 | 2013-03-27 | 株式会社ノーリツ | Heat source equipment |
| JP5641304B2 (en) * | 2010-08-24 | 2014-12-17 | 株式会社ノーリツ | Combustion device |
| JP6822103B2 (en) * | 2016-12-01 | 2021-01-27 | 株式会社ノーリツ | Hot water supply device and control method of hot water supply device |
-
1997
- 1997-09-08 JP JP9242422A patent/JP2990665B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1183008A (en) | 1999-03-26 |
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