JPH07190395A - Hot water supply heater - Google Patents

Hot water supply heater

Info

Publication number
JPH07190395A
JPH07190395A JP33537393A JP33537393A JPH07190395A JP H07190395 A JPH07190395 A JP H07190395A JP 33537393 A JP33537393 A JP 33537393A JP 33537393 A JP33537393 A JP 33537393A JP H07190395 A JPH07190395 A JP H07190395A
Authority
JP
Japan
Prior art keywords
hot water
temperature
water
heat exchanger
bypass
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.)
Granted
Application number
JP33537393A
Other languages
Japanese (ja)
Other versions
JP3097430B2 (en
Inventor
Tomio Miyake
富雄 三宅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noritz Corp
Original Assignee
Noritz Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Noritz Corp filed Critical Noritz Corp
Priority to JP05335373A priority Critical patent/JP3097430B2/en
Publication of JPH07190395A publication Critical patent/JPH07190395A/en
Application granted granted Critical
Publication of JP3097430B2 publication Critical patent/JP3097430B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Landscapes

  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

PURPOSE:To make it possible to use a heat exchanger at a low-temperature corrosion region or a proper temperature range which is out of a boiling region and improve water output properties when resupplying hot water as,well CONSTITUTION:To comply with hot water supply requirements, a control means 9 adds up a required definite value to a setting temperature and computes so as to set a target boiling up temperature of a heat exchanger 1 to a proper range which is out of a low temperature corrosion region or a boiling up region and further computes a target distribution ratio between hot water from the heat exchanger 1 and water from a bypass line 4 based on the computed target boiling up temperature, the setting temperature and a water inlet temperature and provides a function which controls the opening of a bypass valve 8 based on the target distribution ratio.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、熱交換器からの湯とバ
イパス路からの水とを混合して任意の設定温度の出湯を
行ういわゆるバイパスミキシング方式の給湯器に係り、
特にバイパス水量を可変するバイパス弁を備えるものの
改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called bypass mixing type water heater that mixes hot water from a heat exchanger with water from a bypass to discharge hot water at an arbitrary set temperature,
Particularly, the present invention relates to improvement of a device provided with a bypass valve for varying the amount of bypass water.

【0002】[0002]

【従来の技術】バイパスミキシング方式の給湯器の一般
的な構成を図4に示す。図中、50は熱交換器、51は
入水路、52は出湯路、53はバイパス路、54は合流
部、55はバーナ、56はカランなどの先栓、57はバ
イパス弁、58は制御手段である。熱交換器50の入水
端部に入水路51が、また、熱交換器50の吐出端部に
出湯路52がそれぞれ接続されており、入水路51と出
湯路52とにバイパス路53がそれぞれ接続されてい
る。出湯路52とバイパス路53との接続部が合流部5
4となっている。バイパス弁57は、バイパス路53の
途中に設けられてバイパス水量を可変調節するものであ
る。制御手段58は、熱交換器50による焚き上げ温度
やバイパス弁57の開度を制御するものである。
2. Description of the Related Art A general structure of a bypass mixing type water heater is shown in FIG. In the figure, 50 is a heat exchanger, 51 is a water inlet, 52 is a hot water outlet, 53 is a bypass, 54 is a confluence section, 55 is a burner, 56 is a plug such as a calan, 57 is a bypass valve, and 58 is a control means. Is. A water inlet path 51 is connected to the water inlet end of the heat exchanger 50, and a hot water outlet 52 is connected to the discharge end of the heat exchanger 50, and a bypass passage 53 is connected to the water inlet 51 and the hot water outlet 52. Has been done. The joining portion of the tap passage 52 and the bypass passage 53 is the merging portion 5.
It is 4. The bypass valve 57 is provided in the middle of the bypass passage 53 and variably adjusts the amount of bypass water. The control means 58 controls the heating temperature by the heat exchanger 50 and the opening degree of the bypass valve 57.

【0003】ところで、給湯要求時の制御として、本願
出願人は、次のような方式を提案している。それは、バ
イパス弁57によるバイパス水量を一定とする分配比率
(例えば湯:水=1:1)での混合出湯温度がユーザー
により要求される設定温度となるように、バーナ54の
燃焼能力をフィードフォワード制御するとともに、設定
温度と実際の混合出湯温度との偏差に基づいてバイパス
弁57によるバイパス水量をフィードバック制御するこ
とにより、ほぼ設定温度での出湯を行わせるものであ
る。なお、フィードフォワード制御で分配比率を固定と
しているのは、バイパス弁57の動作応答速度が遅いこ
とを考慮しているからである。
By the way, the applicant of the present application has proposed the following method for controlling the hot water supply request. It feed-forwards the combustion capacity of the burner 54 so that the mixed tap water temperature at a distribution ratio (for example, hot water: water = 1: 1) that makes the amount of bypass water by the bypass valve 57 constant becomes the set temperature required by the user. In addition to the control, the amount of bypass water by the bypass valve 57 is feedback-controlled based on the deviation between the set temperature and the actual mixed hot water temperature, so that the hot water is discharged at about the set temperature. The reason why the distribution ratio is fixed by the feedforward control is that the operation response speed of the bypass valve 57 is slow.

【0004】[0004]

【発明が解決しようとする課題】上記従来装置の場合、
入水温度が高い夏場だと熱交換器50の目標焚き上げ温
度がかなり低くなるように設定される一方、入水温度が
低い冬場だと目標焚き上げ温度がかなり高くなるように
設定される。甚だしい場合には、夏場だと熱交換器50
の目標焚き上げ温度が低温腐食域(熱交換器が結露しや
すい温度域)に、また、冬場だと熱交換器50の目標焚
き上げ温度が沸騰域に設定されることになってしまい、
器具の安全性や耐久性の低下が懸念される。
In the case of the above-mentioned conventional device,
The target heating temperature of the heat exchanger 50 is set to be considerably low in the summer when the incoming water temperature is high, while the target heating temperature is set to be considerably high in the winter when the incoming water temperature is low. In extreme cases, heat exchanger 50 during summer
The target heating temperature of is set to a low temperature corrosion range (a temperature range where the heat exchanger is likely to be condensed), and in winter, the target heating temperature of the heat exchanger 50 is set to a boiling range.
There is concern that the safety and durability of the equipment may decrease.

【0005】また、従来装置では、バイパスミキシング
方式の給湯器特有の冷温水現象つまり、給湯を一時的に
停止してから再給湯するときに、熱交換器50の後焚き
または自然放熱により先栓56からの混合出湯温度が一
時的に高くなったり低くなったりする現象が発生して
も、バイパス弁57の開度を増減するフィードバック制
御が機能して出湯特性を良好とするようになっているも
のの、特に入水温度が高い夏場や低い冬場では、目標焚
き上げ温度に対応する一定の分配比率(例えば湯:水=
1:1)から、再給湯時のフィードバック制御による分
配比率(例えば水側全開や水側全閉)へと変更量を大き
くする必要があるために、バイパス弁57の動作が追従
できなくなって冷温水現象の抑制効果が不十分となるこ
とが懸念される。
Further, in the conventional apparatus, the hot and cold water phenomenon peculiar to the bypass mixing type water heater, that is, when the hot water is temporarily stopped and then reheated, the heat exchanger 50 is post-heated or spontaneously dissipates heat. Even if the mixed hot water temperature from 56 temporarily rises or falls, the feedback control for increasing or decreasing the opening of the bypass valve 57 functions to improve the hot water discharge characteristics. However, especially in summer or winter when the water temperature is high, a certain distribution ratio (for example, hot water: water = corresponding to the target heating temperature).
Since it is necessary to increase the amount of change from 1: 1) to a distribution ratio by feedback control during re-hot water supply (for example, water side fully open or water side fully closed), the operation of the bypass valve 57 cannot follow and the cold temperature is maintained. There is concern that the effect of suppressing the water phenomenon will be insufficient.

【0006】本発明は、このような事情に鑑み、入水温
度の高低に関係なく、熱交換器を低温腐食域や沸騰域か
ら外れる適正温度範囲で使用できるようにするととも
に、再給湯時の出湯特性を改善できるようにすることを
課題としている。
In view of such circumstances, the present invention makes it possible to use the heat exchanger in an appropriate temperature range outside the low temperature corrosion area or the boiling area regardless of whether the incoming water temperature is high or low. The challenge is to be able to improve the characteristics.

【0007】[0007]

【課題を解決するための手段】本発明は、熱交換器から
の湯とバイパス路からの水とを混合して任意の設定温度
の出湯を行うもので、バイパス路の途中に設けられてバ
イパス水量を可変制御するバイパス弁と、熱交換器によ
る焚き上げ温度やバイパス弁の開度を制御する制御手段
とを備えるバイパスミキシング方式の給湯器において、
次のように構成する。
According to the present invention, hot water from a heat exchanger is mixed with water from a bypass passage to discharge hot water at an arbitrary set temperature. The bypass passage is provided in the middle of the bypass passage. In a bypass mixing type hot water supply device comprising a bypass valve for variably controlling the amount of water, and a control means for controlling the heating temperature by the heat exchanger and the opening degree of the bypass valve,
Configure as follows.

【0008】本発明では、前記制御手段が、給湯要求に
伴い、熱交換器の目標焚き上げ温度を、低温腐食域や沸
騰域から外れる適正範囲となるように設定温度に所要の
一定値を加算して算出するとともに、この算出した目標
焚き上げ温度、設定温度および入水温度に基づいて熱交
換器からの湯とバイパス路からの水との目標分配比率を
算出し、この目標分配比率に基づいてバイパス弁の開度
を制御する機能を有する。
In the present invention, the control means adds a required constant value to the set temperature so that the target heating temperature of the heat exchanger becomes an appropriate range outside the low temperature corrosion region or the boiling region in response to the hot water supply request. The target distribution ratio between the hot water from the heat exchanger and the water from the bypass passage is calculated based on the calculated target heating temperature, the set temperature, and the incoming water temperature, and based on this target distribution ratio. It has a function of controlling the opening degree of the bypass valve.

【0009】[0009]

【作用】本発明では、給湯要求時に分配比率を可変制御
する方式としながら、熱交換器の目標焚き上げ温度を低
温腐食域や沸騰域から外れる適正範囲となるように設定
温度に所要の一定値を加算して設定するとともに、この
目標焚き上げ温度を加味して目標分配比率を算出するこ
とにより、目標分配比率を大き過ぎたり小さ過ぎたりし
ない中間範囲に収める設定となるようにしている。
According to the present invention, while the distribution ratio is variably controlled when hot water is requested, the target heating temperature of the heat exchanger is set to a predetermined constant value so as to be in an appropriate range outside the low temperature corrosion range or the boiling range. Is set, and the target distribution ratio is calculated in consideration of the target heating temperature, so that the target distribution ratio is set to an intermediate range that is neither too large nor too small.

【0010】これにより、入水温度が高い夏場や低い冬
場でも、熱交換器の目標焚き上げ温度を低くし過ぎたり
高くし過ぎたり設定せずに済むようになるとともに、再
給湯時の分配比率の変更量を小さくできるようになる。
As a result, the target heating temperature of the heat exchanger does not need to be set too low or too high even in summer or low winter when the water temperature is high, and the distribution ratio at the time of re-hot water supply can be reduced. The amount of change can be reduced.

【0011】[0011]

【実施例】以下、本発明の詳細を図1ないし図3に示す
実施例に基づいて説明する。図1は給湯器の概略構成
図、図2は熱交換器の湯温変化を示すグラフ、図3はバ
イパス弁の分配比率とバイパス弁の駆動ステップ数との
関係を示すグラフをそれぞれ示している。本実施例では
従来例と基本的な構成を同じにした例を挙げている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the embodiments shown in FIGS. FIG. 1 is a schematic configuration diagram of a water heater, FIG. 2 is a graph showing a change in hot water temperature of a heat exchanger, and FIG. 3 is a graph showing a relationship between a distribution ratio of a bypass valve and a driving step number of the bypass valve. . In this embodiment, an example in which the basic configuration is the same as that of the conventional example is given.

【0012】図中、1は熱交換器、2は入水路、3は出
湯路、4はバイパス路、5は合流部、6はバーナ、7は
カランなどの先栓、8はバイパス弁、9は制御手段であ
る。10は水量センサ、11は入水温センサ、12は熱
交換器1の吐出側に設けられる缶体出湯温度センサ、1
3は合流部5よりも下流の出湯路3に設けられる混合出
湯温度センサである。熱交換器1の入水端部に入水路2
が、また、熱交換器1の吐出端部に出湯路3がそれぞれ
接続されており、入水路2と出湯路3とにバイパス路4
がそれぞれ接続されている。出湯路3とバイパス路4と
の接続部が合流部5となっている。バイパス弁8は、図
示しないステッピングモータにより開閉駆動されるもの
であり、その開度つまりステッピングモータのステップ
数と分配比率との関係は図3に示すようになっている。
In the figure, 1 is a heat exchanger, 2 is a water inlet channel, 3 is a hot water outlet channel, 4 is a bypass channel, 5 is a confluence section, 6 is a burner, 7 is a front plug such as a calan, 8 is a bypass valve, 9 Is a control means. Reference numeral 10 is a water amount sensor, 11 is an incoming water temperature sensor, 12 is a can body outlet hot water temperature sensor provided on the discharge side of the heat exchanger 1, 1
Reference numeral 3 is a mixed hot water temperature sensor provided in the hot water discharge path 3 downstream of the confluence section 5. Water inlet 2 at the water inlet end of heat exchanger 1.
However, the hot water outlet 3 is connected to the discharge end of the heat exchanger 1, and the bypass passage 4 is connected to the water inlet 2 and the hot water outlet 3.
Are connected respectively. A connecting portion between the hot water passage 3 and the bypass passage 4 forms a merging portion 5. The bypass valve 8 is driven to be opened and closed by a stepping motor (not shown), and the relationship between the opening degree, that is, the number of steps of the stepping motor and the distribution ratio is as shown in FIG.

【0013】本実施例では、給湯要求時に分配比率(熱
交換器1からの湯とバイパス路4からの水との混合比
率)を可変制御する方式としながら、この分配比率も大
き過ぎたり小さ過ぎたりしない中間範囲に収める設定と
なるように工夫している点に特徴がある。
In this embodiment, the distribution ratio (mixing ratio of hot water from the heat exchanger 1 and water from the bypass 4) is variably controlled when hot water is requested, but the distribution ratio is too large or too small. It is characterized in that it is devised so that it is set to fall within the intermediate range.

【0014】具体的に、制御手段9は、給湯要求時つま
り水量センサ10で検出される入水量Qsが所定の最低
作動水量MOQよりも大きいとき、熱交換器1での目標
焚き上げ温度KTsつまり缶体出湯温度を低温腐食域や
沸騰域から外れる適正範囲となるように設定温度Tsに
所要の一定値β(例えば25℃)を加算して算出(下記
式または参照)し、この目標焚き上げ温度KTsに
缶体出湯温度センサ12で検出する検出缶体出湯温度T
hを一致させるように、バーナ6のガス量Gを式によ
り算出して設定するとともに、目標分配比率ρを下記式
により算出し、この目標分配比率ρに基づいてバイパ
ス弁8の開度を制御する(フィードフォワード制御)。
そして、制御手段9は、設定温度Tsと実際の混合出湯
温度(混合出湯温度センサ13の出力)Tmとの間に偏
差が生じる場合には、この偏差に基づいてバイパス弁8
の開度の補正を行う(フィードバック制御)。また、制
御手段9は、給湯を停止してから所要時間経過後に再給
湯するときには、この再給湯に伴う冷温水現象を抑制す
る制御を行う。
Specifically, the control means 9 controls the target heating temperature KTs of the heat exchanger 1, that is, when the hot water supply request is made, that is, when the water input amount Qs detected by the water amount sensor 10 is larger than a predetermined minimum operating water amount MOQ. Calculate by adding the required constant value β (for example, 25 ° C) to the set temperature Ts so that the temperature of the hot water discharged from the can is out of the low temperature corrosion range and the boiling range (see the following formula or reference), and this target heating Detection can body hot water temperature T detected by the can body hot water temperature sensor 12 to the temperature KTs
The gas amount G of the burner 6 is calculated and set by an equation so as to match h, the target distribution ratio ρ is calculated by the following formula, and the opening degree of the bypass valve 8 is controlled based on this target distribution ratio ρ. Yes (feedforward control).
Then, when a deviation occurs between the set temperature Ts and the actual mixed hot water temperature (output of the mixed hot water temperature sensor 13) Tm, the control means 9 determines the bypass valve 8 based on this deviation.
The opening degree of is corrected (feedback control). Further, when the hot water supply is stopped and the hot water is supplied again after a required time has elapsed, the control means 9 performs control for suppressing the cold / hot water phenomenon associated with the hot water supply.

【0015】 KTs=Ts+β (但し、βは定数) ρ=(KTs−Ts)/(Ts−Tc)=β/(Ts−Tc) KTs=ρ・(Ts−Tc)+Ts G=(KTs−Tc)・Qs なお、式により算出した目標分配比率ρが、所定範囲
(ρmin≦ρ≦ρmax)に収まる場合には、この算
出結果に基づいてバイパス弁8の開度が制御されるけれ
ども、前記範囲に収まらない場合(ρmin>ρ>ρm
ax)は、従来と同様、目標分配比率ρをα(定数)で
一定とし、目標焚き上げ温度KTsを式により算出
し、この算出結果に基づいてバーナ6の燃焼能力が制御
される。これはつまり、分配比率が小さ過ぎると(ρm
in未満)、バイパス水量が一定以上減少することにな
るために、必要な給湯量が得られなくなる一方、分配比
率が大き過ぎると(ρmaxを越える)、バイパス水量
が一定以上増加することになるために、再給湯時のオー
バーシュート現象を抑制しにくくなるからである。そし
て、前述のρminは、0.5に、また、ρmaxは、
1.3にとそれぞれ経験的に設定される。
KTs = Ts + β (where β is a constant) ρ = (KTs−Ts) / (Ts−Tc) = β / (Ts−Tc) KTs = ρ · (Ts−Tc) + Ts G = (KTs−Tc ) · Qs If the target distribution ratio ρ calculated by the formula falls within a predetermined range (ρmin ≦ ρ ≦ ρmax), the opening degree of the bypass valve 8 is controlled based on the calculation result, If it doesn't fit into (ρmin>ρ> ρm
As in the conventional case, ax) is such that the target distribution ratio ρ is constant at α (constant), the target heating temperature KTs is calculated by an equation, and the combustion capacity of the burner 6 is controlled based on the calculation result. This means that if the distribution ratio is too small (ρm
If the distribution ratio is too large (exceeds ρmax), the amount of bypass water will increase by a certain amount or more, while the amount of bypass water will decrease by a certain amount or more, and the required hot water supply amount will not be obtained. In addition, it is difficult to suppress the overshoot phenomenon during hot water resupply. Then, the aforementioned ρmin is 0.5, and ρmax is
It is set empirically to 1.3.

【0016】ここで、本実施例の目標焚き上げ温度や分
配比率と従来例(分配比率ρを固定とするもの)とを対
比した例を説明する。
Here, an example in which the target heating temperature or distribution ratio of the present embodiment is compared with the conventional example (where the distribution ratio ρ is fixed) will be described.

【0017】(1)設定温度Ts=50℃、入水温度T
c=5℃の場合、従来例における固定の分配比率ρ=1
とすると目標焚き上げ温度KTs=95℃となって沸騰
域となり、長期間待機後の再給湯時にアンダーシュート
現象となりやすい。これに対して、本実施例の場合だと
目標焚き上げ温度KTs=75℃となり、分配比率ρ=
0.56となり、沸騰域にならずに済むし、また長期間
待機後の再給湯時にも応答が速くなってアンダーシュー
ト現象が発生しにくくなる。
(1) Set temperature Ts = 50 ° C., incoming water temperature T
When c = 5 ° C., fixed distribution ratio ρ = 1 in the conventional example
Then, the target heating temperature KTs = 95 ° C. is set in the boiling region, and an undershoot phenomenon is likely to occur during re-hot water supply after waiting for a long time. On the other hand, in the case of the present embodiment, the target heating temperature KTs = 75 ° C. and the distribution ratio ρ =
The value is 0.56, and it is not necessary to reach the boiling range, and the response is quick even during re-hot water supply after waiting for a long time, and the undershoot phenomenon is less likely to occur.

【0018】(2)設定温度Ts=40℃、入水温度T
c=20℃の場合、従来例における固定の分配比率ρ=
1とすると目標焚き上げ温度KTs=60℃となって低
温腐食域となり、短期間待機後の再給湯時にオーバーシ
ュート現象となりやすい。これに対して、本実施例の場
合だと目標焚き上げ温度KTs=65℃となり、分配比
率ρ=1.25となり、低温腐食域にならずに済むし、
また短期間待機後の再給湯時にも応答が速くなってオー
バーシュート現象が発生しにくくなる。
(2) Set temperature Ts = 40 ° C., incoming water temperature T
When c = 20 ° C., fixed distribution ratio ρ =
When it is set to 1, the target heating temperature KTs = 60 ° C., which is a low temperature corrosion region, and an overshoot phenomenon is likely to occur during hot water re-supply after a short period of standby. On the other hand, in the case of the present embodiment, the target heating temperature KTs = 65 ° C., the distribution ratio ρ = 1.25, and the low temperature corrosion region is not reached.
In addition, the response is quick even when hot water is re-supplied after a short period of waiting, and the overshoot phenomenon is less likely to occur.

【0019】以上説明したように、本発明では、入水温
度の高低に関係なく、目標焚き上げ温度KTsを低温腐
食域や沸騰域から外れる適正範囲となるように一義的に
設定することにより、熱交換器1の低温腐食や沸騰破損
を回避させている。また、バイパス比率を大き過ぎたり
小さ過ぎたりしない中間範囲に収めるようにすることに
より、再給湯時に分配比率の変更量つまりバイパス弁8
の開度制御量を可及的に少なくさせている。
As described above, according to the present invention, the target heating temperature KTs is uniquely set so as to be in a proper range out of the low temperature corrosion region or the boiling region, regardless of whether the incoming water temperature is high or low. Low temperature corrosion and boiling damage of the exchanger 1 are avoided. Further, by setting the bypass ratio within an intermediate range that is neither too large nor too small, the change amount of the distribution ratio at the time of re-hot water supply, that is, the bypass valve 8
The opening control amount of is reduced as much as possible.

【0020】[0020]

【発明の効果】本発明によれば、バイバスミキシング方
式の給湯器において、入水温度が高い夏場や低い冬場で
も、熱交換器の目標焚き上げ温度を低くし過ぎたり高く
し過ぎたり設定せずに済むようにしているとともに、再
給湯時の分配比率の変更量を小さくできるようにしてい
るから、熱交換器の低温腐食や異常加熱を回避できて器
具の安全性や耐久性を向上できるようになる他、再給湯
時のオーバーシュートやアンダシュートといった冷温水
現象の発生を抑制できて出湯特性を改善できるようにな
る。このように本発明では給湯器の信頼性の向上に貢献
する。
According to the present invention, in the water heater of the by-bass mixing system, the target heating temperature of the heat exchanger is not set too low or too high even in the summer and winter when the incoming water temperature is high. In addition to making it possible to reduce the amount of change in the distribution ratio at the time of re-hot water supply, it is possible to avoid low temperature corrosion and abnormal heating of the heat exchanger and improve the safety and durability of the equipment. The occurrence of cold and hot water phenomena such as overshoot and undershoot at the time of re-hot water supply can be suppressed and the hot water discharge characteristics can be improved. As described above, the present invention contributes to the improvement of reliability of the water heater.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の給湯器の一実施例の概略構成図。FIG. 1 is a schematic configuration diagram of an embodiment of a water heater according to the present invention.

【図2】同給湯器の熱交換器の湯温変化を示すグラフ。FIG. 2 is a graph showing changes in hot water temperature of the heat exchanger of the water heater.

【図3】バイパス弁の分配比率とバイパス弁の駆動ステ
ップ数との関係を示すグラフ。
FIG. 3 is a graph showing the relationship between the distribution ratio of the bypass valve and the number of drive steps of the bypass valve.

【図4】従来の給湯器の構成図。FIG. 4 is a configuration diagram of a conventional water heater.

【符号の説明】[Explanation of symbols]

1 熱交換器 2 入水路 3 出湯路 4 バイパス路 6 バーナ 7 先栓 8 バイパス弁 9 制御手段 12 缶体出湯温度センサ 13 混合出湯温度センサ 1 Heat Exchanger 2 Inlet Channel 3 Outlet Channel 4 Bypass Channel 6 Burner 7 Front Plug 8 Bypass Valve 9 Control Means 12 Can Body Outlet Temperature Sensor 13 Mixed Outlet Temperature Sensor

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 熱交換器からの湯とバイパス路からの水
とを混合して任意の設定温度の出湯を行うもので、バイ
パス路の途中に設けられてバイパス水量を可変制御する
バイパス弁と、熱交換器による焚き上げ温度やバイパス
弁の開度を制御する制御手段とを備える給湯器であっ
て、 前記制御手段が、給湯要求に伴い、熱交換器の目標焚き
上げ温度を、低温腐食域や沸騰域から外れる適正範囲と
なるように設定温度に所要の一定値を加算して算出する
とともに、この算出した目標焚き上げ温度、設定温度お
よび入水温度に基づいて熱交換器からの湯とバイパス路
からの水との目標分配比率を算出し、この目標分配比率
に基づいてバイパス弁の開度を制御する機能を有する、
ことを特徴とする給湯器。
1. A bypass valve for mixing hot water from a heat exchanger and water from a bypass passage to discharge hot water at an arbitrary set temperature, the bypass valve being provided in the middle of the bypass passage to variably control the amount of bypass water. A hot water supply device comprising a control means for controlling the heating temperature by the heat exchanger and the opening degree of the bypass valve, wherein the control means is a target heating temperature of the heat exchanger for the hot water supply request, the low temperature corrosion Calculated by adding the required constant value to the set temperature so that it is in an appropriate range that deviates from the range and boiling range, and the hot water from the heat exchanger is calculated based on the calculated target heating temperature, set temperature, and incoming water temperature. It has a function of calculating a target distribution ratio with water from the bypass passage and controlling the opening degree of the bypass valve based on this target distribution ratio.
A water heater characterized by that.
JP05335373A 1993-12-28 1993-12-28 Water heater Expired - Fee Related JP3097430B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05335373A JP3097430B2 (en) 1993-12-28 1993-12-28 Water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP05335373A JP3097430B2 (en) 1993-12-28 1993-12-28 Water heater

Publications (2)

Publication Number Publication Date
JPH07190395A true JPH07190395A (en) 1995-07-28
JP3097430B2 JP3097430B2 (en) 2000-10-10

Family

ID=18287818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP05335373A Expired - Fee Related JP3097430B2 (en) 1993-12-28 1993-12-28 Water heater

Country Status (1)

Country Link
JP (1) JP3097430B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130180274A1 (en) * 2010-10-29 2013-07-18 Mitsubishi Electric Corporation Refrigeration cycle apparatus and refrigeration cycle control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130180274A1 (en) * 2010-10-29 2013-07-18 Mitsubishi Electric Corporation Refrigeration cycle apparatus and refrigeration cycle control method

Also Published As

Publication number Publication date
JP3097430B2 (en) 2000-10-10

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