JP2001065988A - Electric water heater - Google Patents
Electric water heaterInfo
- Publication number
- JP2001065988A JP2001065988A JP24101199A JP24101199A JP2001065988A JP 2001065988 A JP2001065988 A JP 2001065988A JP 24101199 A JP24101199 A JP 24101199A JP 24101199 A JP24101199 A JP 24101199A JP 2001065988 A JP2001065988 A JP 2001065988A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- temperature
- water
- daytime
- supplied
- 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
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、電気温水器の沸
き上げ制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to boiling water control of an electric water heater.
【0002】[0002]
【従来の技術】一般的に電気温水器の本来の目的は、使
用者の必要に応じて湯を供給することにあり、この目的
を達成するためには湯切れを無くす必要があった。以下
に従来の電気温水器の構成を示す。図7は従来の電気温
水器のシステム構成図、図8は従来の電気温水器の制御
フロー図である。2. Description of the Related Art In general, the primary purpose of an electric water heater is to supply hot water as required by a user, and it has been necessary to eliminate running out of hot water in order to achieve this purpose. The configuration of a conventional electric water heater is shown below. FIG. 7 is a system configuration diagram of a conventional electric water heater, and FIG. 8 is a control flow diagram of the conventional electric water heater.
【0003】図7において、電気温水器本体1内の中央
には、温めたお湯を貯めておく貯湯タンク2が配置され
ている。この貯湯タンク2の底部は給水側配管3と接続
されており、給水側配管3の途中に設けられた減圧弁5
によって一定圧力で貯湯タンク2への給水が行われる。
また、この貯湯タンク2の上部は図示しない給湯弁が設
けられた給湯側配管4と接続されており、貯湯タンク2
内で温められたお湯は、給湯弁を開くことにより給水側
の圧力の作用で給湯側配管4を経由してお風呂等に供給
され、この給湯量に等しい量の水が給水側配管3から貯
湯タンク2内に供給される。この時、貯湯タンク2内を
一定の圧力に保っておくために、給湯側配管4の途中に
逃がし弁6が設けられている。In FIG. 7, a hot water storage tank 2 for storing hot water is disposed in the center of an electric water heater main body 1. The bottom of the hot water storage tank 2 is connected to a water supply pipe 3, and a pressure reducing valve 5 provided in the middle of the water supply pipe 3.
Thus, water is supplied to the hot water storage tank 2 at a constant pressure.
The upper portion of the hot water storage tank 2 is connected to a hot water supply side pipe 4 provided with a hot water supply valve (not shown).
The hot water heated inside is supplied to a bath or the like via the hot water supply pipe 4 by the action of the pressure on the water supply side by opening the hot water supply valve, and an amount of water equal to this hot water supply amount is supplied from the water supply side pipe 3. It is supplied into the hot water storage tank 2. At this time, a relief valve 6 is provided in the middle of the hot water supply pipe 4 in order to keep the inside of the hot water storage tank 2 at a constant pressure.
【0004】また、貯湯タンク2の内底部には、タンク
2内の温水を昇温するための発熱体8が設けられ、貯湯
タンク2の外側部には、温水の温度、給水水温、及び残
湯温度を検出することができる温度センサ9が取付けら
れている。更に、電気温水器本体1内には、通電時間帯
を検出して貯湯タンク2の沸き上げを制御する制御部1
0が設置されている。この制御部10は、発熱体8、温
度センサ9及び電気温水器本体1外に設置され使用者が
温水の沸上げの指示を行う操作部11と電気的に接続さ
れている。即ち、制御部10は、温度センサ8の温度検
出値と操作部11からの入力値に基づいて、発熱体8へ
の通電を制御する構成になっている。[0004] A heating element 8 for raising the temperature of the hot water in the tank 2 is provided at the inner bottom of the hot water storage tank 2, and the temperature of the hot water, the temperature of the supply water, and the temperature of the remaining water are provided outside the hot water storage tank 2. A temperature sensor 9 that can detect hot water temperature is attached. Further, in the electric water heater main body 1, a control unit 1 that detects a power supply time zone and controls the boiling of the hot water storage tank 2.
0 is set. The control unit 10 is electrically connected to the heating unit 8, the temperature sensor 9, and the operation unit 11 which is provided outside the electric water heater main body 1 and in which a user instructs boiling of hot water. That is, the control unit 10 is configured to control the energization of the heating element 8 based on the temperature detection value of the temperature sensor 8 and the input value from the operation unit 11.
【0005】次に上記構成を有する従来の電気温水器の
動作について図8の制御フロー図を用いて説明する。電
気温水器1の電源(図示せず)をONすると、電気温水
器1は通電制御を開始し(ステップS1)、制御部10
は現在の通電供給時間帯を検出する(ステップS2)。
通電供給時間帯を検出すると、現在、昼間時間帯(朝7
時から夜11時まで)または夜間時間帯(夜11時から
翌朝7時)のいずれの時間帯であるか(ステップS3)
を判定する。ここで、昼間時間帯よりも夜間時間帯の方
が電気代が安いため、沸き上げ制御を夜間時間帯にのみ
行う電気温水器もある。Next, the operation of the conventional electric water heater having the above configuration will be described with reference to the control flow chart of FIG. When the power supply (not shown) of the electric water heater 1 is turned on, the electric water heater 1 starts energization control (step S1), and the control unit 10
Detects the current energization supply time zone (step S2).
When the power supply time zone is detected, the current daytime time zone (7
(From time till 11:00 p.m.) or night time (from 11:00 p.m. to 7:00 in the next morning) (step S3)
Is determined. Here, since the electricity bill is cheaper in the night time zone than in the daytime zone, there is an electric water heater that performs the heating control only in the night time zone.
【0006】昼間時間帯でない場合、すなわち夜間時間
帯の場合(ステップS3のNO)は、発熱体8に通電を
開始し(ステップS6)、温度センサ9で沸き上げ温度
を検出し、沸き上げ温度が所定のT℃(90℃)になる
まで沸き上げると(ステップS7)、発熱体8への通電
を停止し(ステップS8)、通電制御を終了する(ステ
ップS9)。一方、昼間時間帯である場合は(ステップ
S3のYES)、制御部10は温度センサ9の貯湯タン
ク2側部(温度センサ6の取付部)の検出温度値に基づ
いて貯湯タンク2内の残湯量を算出する(ステップS
4)。つまり、温度センサ9が給水水温を検出した場合
には貯湯タンク2の温度センサ9取付位置まで低温の水
が押し上げていること意味するため所定の残湯量無しと
判定し、温度センサ9が給水水温以上を検出した場合に
は、少なくとも温度センサ9の取付位置以上には温水が
確保されているため所定の残湯量ありと判定する。If it is not the daytime zone, that is, if it is the nighttime zone (NO in step S3), the power supply to the heating element 8 is started (step S6), the temperature sensor 9 detects the boiling temperature, and the heating temperature is detected. Is heated to a predetermined T ° C. (90 ° C.) (step S7), the power supply to the heating element 8 is stopped (step S8), and the power supply control is terminated (step S9). On the other hand, if it is during the daytime (YES in step S3), control unit 10 determines the remaining amount in hot water storage tank 2 based on the detected temperature value of temperature sensor 9 on the side of hot water storage tank 2 (the mounting portion of temperature sensor 6). Calculate the amount of hot water (Step S
4). That is, when the temperature sensor 9 detects the temperature of the supply water, it means that the low-temperature water has been pushed up to the mounting position of the temperature sensor 9 of the hot water storage tank 2, so it is determined that there is no predetermined amount of remaining hot water. When the above is detected, it is determined that there is a predetermined remaining amount of hot water since hot water is secured at least at the mounting position of the temperature sensor 9 or more.
【0007】従って、制御部10で残湯量を算出し、所
定量未満の残湯量になったと判定した場合(ステップS
5のYES)、湯切れを無くすために所定の湯量を確保
する必要があるため発熱体8への通電を開始し(ステッ
プS6)、貯湯タンク2内の湯をT℃(90℃)まで沸
き上げた後、通電を停止して(ステップS8)、通電制
御を終了する。(ステップS9)。一方、制御部10が
所定量以上の残湯量があると判定した場合は(ステップ
S5のNO)、湯切れを防止するために必要な湯量は確
保されているため、沸き上げ制御を行わない。Therefore, when the remaining hot water amount is calculated by the control unit 10 and it is determined that the remaining hot water amount is less than the predetermined amount (step S
(YES in No. 5), since it is necessary to secure a predetermined amount of hot water in order to eliminate running out of hot water, energization of the heating element 8 is started (step S6), and the hot water in the hot water storage tank 2 is boiled to T ° C. (90 ° C.). After raising, the energization is stopped (step S8), and the energization control is ended. (Step S9). On the other hand, when the control unit 10 determines that the remaining hot water amount is equal to or more than the predetermined amount (NO in step S5), the boiling water control is not performed because the required hot water amount for preventing the running out of hot water is secured.
【0008】[0008]
【発明が解決しようとする課題】従来の電気温水器は、
昼間の時間帯に、貯湯タンクの温度センサ取付部におけ
る水の温度を検出し、その検出値から温度センサ取付部
まで温水が押し上げられているか否かで所定の残湯量の
有無を判定するものであった。そして、貯湯タンク内の
湯切れを防止するため、所定の残湯量未満になったとき
には発熱体へ通電を開始して沸き上げを始めていた。従
って、夜間時間帯(夜11時から翌朝7時)よりも昼間
時間帯(朝7時から夜11時まで)のほうが電気代が高
く設定されているにも関わらず、一日の中でお湯の使用
量の多い夕方の時間帯に、一番多く発熱体へ通電されて
沸き上げが行われるという課題を有していた。特に、温
度センサの取付位置が貯湯タンクの下部の場合にこの傾
向が顕著であった。The conventional electric water heater is
During the daytime, the temperature of the water in the temperature sensor mounting portion of the hot water storage tank is detected, and the presence or absence of a predetermined remaining hot water amount is determined based on whether or not hot water is pushed up to the temperature sensor mounting portion from the detected value. there were. Then, in order to prevent running out of hot water in the hot water storage tank, when the amount of remaining hot water becomes less than a predetermined remaining hot water amount, energization of the heating element is started to start boiling. Therefore, although the electricity bill is set higher during the daytime (from 7:00 am to 11:00 p.m.) than during the night time (from 11:00 p.m. to 7:00 in the next morning), hot water is consumed during the day. There was a problem that the heating element was most frequently energized and heated in the evening hours when the amount of used was large. In particular, this tendency was remarkable when the mounting position of the temperature sensor was below the hot water storage tank.
【0009】また、昼間時間帯でも夜間時間帯に沸き上
げる温度と同一温度まで沸き上げるため、電気代の高い
昼間時間帯に多く沸き上げ、電気代の低い夜間時間帯に
ほとんど沸き上げず、電気代が高くなるという課題があ
った。更に、湯の使用量が少ない夏季においても冬季と
同様の沸き上げ制御を行うため、夏季において電気代が
無駄に高くなっているという課題もあった。Also, in the daytime hours, the water is heated to the same temperature as the temperature during the nighttime hours, so that the water is mostly heated during the daytime hours when the electricity bill is high, and almost not during the nighttime hours when the electricity bill is low. There was a problem that the cost increased. Furthermore, even in summer, when the amount of hot water used is small, the same heating control as in winter is performed, so that there is a problem that the electricity bill is unnecessarily high in summer.
【0010】本発明は、上記のような問題点を解消する
ためになされたもので、電気代の高い昼間時間帯の不必
要な発熱体への通電をできるだけ制限するとともに昼間
時間帯の沸き上げ温度は夜間時間帯の沸き上げ温度より
低く設定して電気代を安く抑え、かつ、本来の電気温水
器の目的である湯切れ防止を達成することができる電気
温水器を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to limit the supply of electricity to unnecessary heating elements during the daytime hours when electricity costs are high as much as possible and to raise the temperature during the daytime hours. The purpose of the present invention is to provide an electric water heater that can set the temperature lower than the boiling temperature in the nighttime hours, suppress the electricity bill cheaply, and achieve the prevention of running out of hot water, which is the purpose of the original electric water heater. I do.
【0011】[0011]
【課題を解決するための手段】本発明は、昼間電力また
は夜間電力が給電される加熱手段と、該加熱手段で加熱
した水を貯める貯湯タンクと、該貯湯タンクと接続され
る給水側配管及び給湯側配管と、前記貯湯タンク内の水
の温度を検出する温度センサと、外部への温水の給湯量
を検出する流量センサと、通電時間帯が昼間電力または
夜間電力のいずれが給電される時間帯であるかを判別す
る制御手段とを備えた電気温水器であって、該流量セン
サが所定以上の給湯量を検出したときは前記加熱手段で
水温を沸き上げ温度まで上昇させ、かつ、昼間電力給電
開始からの経過時間を積算し、該経過時間が所定時間に
到達した場合には加熱手段への通電を停止するものであ
る。SUMMARY OF THE INVENTION The present invention provides a heating means to which daytime or nighttime power is supplied, a hot water storage tank for storing water heated by the heating means, a water supply side pipe connected to the hot water storage tank, and A hot water supply side pipe, a temperature sensor for detecting the temperature of water in the hot water storage tank, a flow rate sensor for detecting the amount of hot water to be supplied to the outside, and a power supply time period in which either daytime power or nighttime power is supplied. An electric water heater provided with control means for determining whether or not the water is in a zone, wherein when the flow rate sensor detects a hot water supply amount equal to or greater than a predetermined value, the water temperature is raised to the boiling temperature by the heating means, and during the daytime, The elapsed time from the start of power supply is integrated, and when the elapsed time reaches a predetermined time, the power supply to the heating means is stopped.
【0012】また、本発明は、昼間電力が給電される時
間帯の加熱手段による沸き上げを開始する前記給湯量を
前記温度センサの給水水温の検出値に応じて変更するも
のである。Further, the present invention changes the amount of hot water to start boiling by the heating means during a time period during which power is supplied during the daytime in accordance with a detected value of the temperature of the water supplied by the temperature sensor.
【0013】また、本発明は、昼間電力が給電される時
間帯の前記沸き上げ温度を前記温度センサの給水水温の
検出値に応じて変更するものである。Further, the present invention changes the boiling temperature in a time period during which power is supplied during the daytime in accordance with the detected value of the feed water temperature of the temperature sensor.
【0014】[0014]
【発明の実施の形態】実施の形態1.図1は本発明の実
施の形態1に係わる電気温水器のシステム構成図、図2
は本発明の実施の形態1に係わる電気温水器の制御ブロ
ック図、図3は本発明の実施の形態1に係わる電気温水
器の制御フロー図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a system configuration diagram of an electric water heater according to Embodiment 1 of the present invention, and FIG.
3 is a control block diagram of the electric water heater according to Embodiment 1 of the present invention, and FIG. 3 is a control flow diagram of the electric water heater according to Embodiment 1 of the present invention.
【0015】図1,2において、電気温水器本体1内の
中央には、温めたお湯を貯めておく貯湯タンク2が配置
されている。この貯湯タンク2の底部は給水側配管3と
接続されており、給水側配管3の途中に設けられた減圧
弁5によって一定圧力で給水が行われる。また、この貯
湯タンク2の上部は図示しない給湯弁が設けられた給湯
側配管4と接続されており、貯湯タンク2内で温められ
たお湯は、給湯弁を開くことにより給湯側配管4を経由
してお風呂等に供給され、それと等しい量の水が給水側
配管3から貯湯タンク2内に供給される。この時、貯湯
タンク2内を一定の圧力に保っておくための逃がし弁6
と、給湯されるお湯の流量を検出するための流量センサ
7とが、給湯側配管4の途中に設けられている。この流
量センサ7はお湯の流出量をアナログ的に検出すること
ができるため、温度センサ9を用いて残湯量を検出する
のに較べて精度が高く、沸き上げを開始するタイミング
が温度センサ9の取付位置によって左右されるというこ
とは無い。In FIGS. 1 and 2, a hot water storage tank 2 for storing hot water is disposed in the center of an electric water heater main body 1. The bottom of the hot water storage tank 2 is connected to a water supply side pipe 3, and water is supplied at a constant pressure by a pressure reducing valve 5 provided in the middle of the water supply side pipe 3. The upper portion of the hot water storage tank 2 is connected to a hot water supply pipe 4 provided with a hot water supply valve (not shown). Hot water heated in the hot water storage tank 2 passes through the hot water supply pipe 4 by opening the hot water supply valve. The water is supplied to a bath or the like, and the same amount of water is supplied from the water supply side pipe 3 into the hot water storage tank 2. At this time, a relief valve 6 for keeping the inside of the hot water storage tank 2 at a constant pressure.
And a flow rate sensor 7 for detecting the flow rate of hot water to be supplied are provided in the middle of the hot water supply pipe 4. Since the flow rate sensor 7 can detect the amount of outflow of hot water in an analog manner, the flow sensor 7 has higher accuracy than detecting the amount of remaining hot water using the temperature sensor 9, and the timing of starting boiling is determined by the temperature sensor 9. It does not depend on the mounting position.
【0016】また、貯湯タンク2の内底部には、タンク
2内の温水を昇温するための発熱体8が設けられ、貯湯
タンク2の外側部には、温水の温度、給水水温、及び残
湯温度を検出するための温度センサ9が取付けられてい
る。更に、電気温水器本体1内には、通電時間帯を検出
して貯湯タンク2の沸き上げを制御する制御部10が設
置されている。制御部10は、流量センサ7、発熱体
8、温度センサ9及び電気温水器本体1外に設置され使
用者が温水の沸上げの指示を行う操作部11と電気的に
接続されている。即ち、制御部10は、温度センサ9の
温度検出値と流量センサ7の検出値と操作部11からの
入力値に基づいて、発熱体8への通電を制御する構成に
なっている。A heating element 8 for raising the temperature of the hot water in the tank 2 is provided at the inner bottom of the hot water storage tank 2, and the temperature of the hot water, the temperature of the supply water, and A temperature sensor 9 for detecting hot water temperature is attached. Further, in the electric water heater main body 1, a control unit 10 that detects a power supply time zone and controls the boiling of the hot water storage tank 2 is installed. The control unit 10 is electrically connected to the flow sensor 7, the heating element 8, the temperature sensor 9, and the operation unit 11 which is provided outside the electric water heater main body 1 and in which a user instructs boiling of hot water. That is, the control unit 10 is configured to control the energization of the heating element 8 based on the temperature detection value of the temperature sensor 9, the detection value of the flow sensor 7, and the input value from the operation unit 11.
【0017】次に上記構成を有する従来の電気温水器動
作について図3の制御フロー図を用いて説明する。電気
温水器1の電源(図示せず)をONすると、電気温水器
1は通電制御を開始し(ステップS101)、制御部1
0は現在の通電供給時間帯を検出する(ステップS10
2)。通電供給時間帯を検出すると、現在、昼間時間帯
(朝7時から夜11時まで)または夜間時間帯(夜11
時から翌朝7時)のいずれの時間帯であるか(ステップ
S103)を判定する。Next, the operation of the conventional electric water heater having the above configuration will be described with reference to the control flowchart of FIG. When the power supply (not shown) of the electric water heater 1 is turned on, the electric water heater 1 starts energization control (step S101), and the control unit 1
0 detects the current energization supply time zone (step S10).
2). When the power supply time zone is detected, the daytime time zone (from 7 am to 11 am) or the night time zone (11 am
From the time to 7:00 the next morning), it is determined which time zone it is (step S103).
【0018】昼間時間帯でない場合、つまり夜間時間帯
の場合(ステップS103のNO)は、発熱体8に通電
を開始し(ステップS109)、温度センサ9で温水温
度を検出し、温水温度が所定の沸き上げ温度T1(90
℃)になるまで沸き上げると(ステップS110)、発
熱体8への通電を停止し(ステップS111)、通電制
御を終了する(ステップS112)。一方、昼間時間帯
である場合は(ステップS103のYES)、制御部1
0は流量センサ7で検出した給湯量に基づいて貯湯タン
ク2内の残湯量を算出する(ステップS104)。つま
り、流量センサ7が所定量以上の給湯量を検出したとき
は、所定未満の残湯量であると判定し、流量センサ7が
所定量未満の給湯量を検出したときは、所定以上の残湯
量であると判定する。この所定量が湯切れを防止する限
界量に近ければ近いほど、発熱体9による沸き上げ回数
を減らすことができ、電気代も安く抑えることができ
る。If it is not the daytime zone, that is, if it is the nighttime zone (NO in step S103), the power supply to the heating element 8 is started (step S109), the hot water temperature is detected by the temperature sensor 9, and the hot water temperature is set to a predetermined value. Boiling temperature T1 (90
C.) (Step S110), the power supply to the heating element 8 is stopped (Step S111), and the power supply control ends (Step S112). On the other hand, if it is during the daytime (YES in step S103), the control unit 1
0 calculates the remaining hot water amount in the hot water storage tank 2 based on the hot water supply amount detected by the flow rate sensor 7 (step S104). That is, when the flow rate sensor 7 detects a hot water supply amount equal to or more than a predetermined amount, it is determined that the remaining hot water amount is less than a predetermined amount. Is determined. The closer the predetermined amount is to the limit amount for preventing running out of hot water, the more the number of times of heating by the heating element 9 can be reduced, and the cost of electricity can be reduced.
【0019】従って、制御部10が所定量以上の残湯量
があると判定した場合は(ステップS105のNO)、
湯切れを防止するために必要な湯量は確保されているた
め、沸き上げ制御を行わない。一方、所定量未満の残湯
量になったと判定した場合(ステップS105のYE
S)、湯切れを無くし所定の湯量を確保するために通電
を開始する(ステップS106)。次に昼間電力の給電
を開始すると、同時にこの経過時間をカウントし、所定
時間(例えば10時間)が経過しているか否かどうか、
すなわち、夕方の5時を過ぎたかどうかを判定する(ス
テップS107)。経過時間が10時間以上経過してい
たら(ステップS107のYES)、通電を停止する
(ステップS111)。一方、経過時間が10時間以上
経過していない場合(ステップS107のNO)、貯湯
タンク2内の温水温度が所定の沸き上げ温度T2(70
℃)を越えているか否かを判定する(ステップS10
8)。越えている場合は、沸き上げ制御を終了させるた
め通電を停止して(ステップS111)、通電制御を終
了する(ステップS112)。また、越えていない場合
は(ステップS108のNO)通電を継続する。Therefore, when the control unit 10 determines that the remaining hot water amount is equal to or more than the predetermined amount (NO in step S105),
Since the amount of hot water necessary to prevent running out of hot water is secured, the boiling control is not performed. On the other hand, when it is determined that the remaining hot water amount is less than the predetermined amount (YE in step S105).
S), energization is started to eliminate the running out of hot water and to secure a predetermined amount of hot water (step S106). Next, when the daytime power supply is started, the elapsed time is counted at the same time, and whether or not a predetermined time (for example, 10 hours) has elapsed,
That is, it is determined whether it has passed 5:00 in the evening (step S107). If the elapsed time has passed 10 hours or more (YES in step S107), the power supply is stopped (step S111). On the other hand, when the elapsed time has not elapsed for 10 hours or more (NO in step S107), the temperature of the hot water in the hot water storage tank 2 is increased to the predetermined boiling temperature T2 (70).
(° C.) is determined (step S10).
8). If it exceeds, the energization is stopped to end the boiling control (step S111), and the energization control is ended (step S112). If not exceeded (NO in step S108), energization is continued.
【0020】即ち、本実施の形態では、昼間時間帯の通
電は、昼間時間帯の給電開始から所定時間(10時間)
以内に限られ、また、貯湯タンク2内の湯の温度が夜間
時間帯の沸き上げ温度T1よりも低い沸き上げ温度T2
(70℃)に達すれば、通電を停止して、通電制御を終
了する。従って、電気代の高い昼間時間帯の電力量が制
限され、電気代の削減を図ることができる電気温水器を
提供することができる。That is, in the present embodiment, energization during the daytime period is performed for a predetermined time (10 hours) from the start of power supply during the daytime period.
And the temperature of the hot water in the hot water storage tank 2 is lower than the boiling temperature T1 in the night time zone.
When the temperature reaches (70 ° C.), the energization is stopped, and the energization control ends. Therefore, the amount of electric power in the daytime period when the electricity bill is high can be limited, and an electric water heater that can reduce the electricity bill can be provided.
【0021】なお、本実施の形態では、貯湯タンク2の
昇温のための加熱装置として発熱体8を用いたが、本発
明はこれに限られるものではなく、ヒートポンプ式の熱
交換器を用いても良い。また、本実施の形態では、沸き
上げ温度・給水温度・温度センサ取付部の温度を測定す
るセンサを1つのみ設けているが、本発明はこれに限ら
れず、別々のセンサを用いてそれぞれの温度を測定する
こともできる。In this embodiment, the heating element 8 is used as a heating device for raising the temperature of the hot water storage tank 2. However, the present invention is not limited to this, and a heat pump type heat exchanger may be used. May be. Further, in the present embodiment, only one sensor for measuring the boiling temperature, the feed water temperature, and the temperature of the temperature sensor mounting portion is provided. However, the present invention is not limited to this, and each sensor is provided using a separate sensor. Temperature can also be measured.
【0022】また、本実施の形態では流量センサ7を給
湯配管4の途中に設けて給湯量から残湯量を検出する方
式であるが、本発明はこれに限られるものではなく、給
水配管3の途中に流量センサ7設けて給水量から残湯量
を検出する方式でも良い。Further, in the present embodiment, the flow rate sensor 7 is provided in the middle of the hot water supply pipe 4 to detect the remaining hot water amount from the hot water supply amount. However, the present invention is not limited to this. A method of providing a flow sensor 7 on the way and detecting the remaining hot water amount from the supplied water amount may be used.
【0023】実施の形態2.図4は本発明の実施の形態
2に係わる電気温水器の制御フロー図である。なお、電
気温水器の基本的構成は実施の形態1と同様であるので
説明は省略する。また、実施の形態1と同一又は相当部
分には同じ符号を付し説明を省略する。Embodiment 2 FIG. FIG. 4 is a control flow chart of the electric water heater according to Embodiment 2 of the present invention. Note that the basic configuration of the electric water heater is the same as that of the first embodiment, and a description thereof will be omitted. Further, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
【0024】次に、本発明の実施の形態2に係わる電気
温水器の動作を図1及び図4に基づいて説明する。夜間
時間帯についての動作は実施の形態1と同様であり、以
下、実施の形態1と異なる部分について説明する。図1
と図4において、昼間時間帯である場合は(ステップS
203のYES)、温度センサ9で貯湯タンク2内の水
温検出を行う(ステップS204)。給水された冷水が
温度センサ9の取付部まで押し上げられている場合で
も、給水側配管3から供給される水温が所定温度(15
℃)以上の場合は(ステップS205のYES)、次に
給湯量を流量センサ7で検出して残湯量を算出する(ス
テップS206)。この給湯量が150L以上であれ
ば、湯切れを防止するため、発熱体8に通電を開始する
(ステップS210)。Next, the operation of the electric water heater according to Embodiment 2 of the present invention will be described with reference to FIGS. The operation in the night time zone is the same as that of the first embodiment, and the different points from the first embodiment will be described below. FIG.
4 and FIG. 4, if it is a daytime zone (step S
203, YES), the temperature sensor 9 detects the water temperature in the hot water storage tank 2 (step S204). Even when the supplied cold water is pushed up to the mounting portion of the temperature sensor 9, the temperature of the water supplied from the water supply side pipe 3 is maintained at a predetermined temperature (15 ° C.).
° C) or more (YES in step S205), the amount of hot water is detected by the flow rate sensor 7 to calculate the amount of remaining hot water (step S206). If the hot water supply amount is 150 L or more, energization of the heating element 8 is started to prevent running out of hot water (step S210).
【0025】一方、水温が所定温度(15℃)未満の場
合についても(ステップS205のNO)、給湯量を流
量センサ7で検出する(ステップS208)。この給湯
量が100L以上であれば、湯切れを防止するため、発
熱体8に通電を開始する(ステップS210)。ここ
で、給水される水温が所定温度(15℃)以上又は未満
で給湯量に差を設けたのは、給水される水温が所定温度
(15℃)以上の場合は夏季であると予想され、お湯の
使用量がさほど多くないため湯切れになる心配が少な
く、給湯量が150L未満であれば十分な残湯量ありと
考えて、沸き上げを行わないことにしたのである。これ
に対し、給水される水温が所定温度(15℃)未満の場
合は冬季等であると予想され、お湯の使用量が多いため
給湯量が100L以上であれば湯切れ防止のため沸き上
げを行う必要があるからである。従って、これらの制御
によって、特に夏季において無駄な電力使用量を削減す
ることができる。On the other hand, even when the water temperature is lower than the predetermined temperature (15 ° C.) (NO in step S205), the amount of hot water is detected by the flow rate sensor 7 (step S208). If the hot water supply amount is 100 L or more, energization of the heating element 8 is started to prevent running out of hot water (step S210). Here, the reason for providing the difference in the amount of hot water when the supplied water temperature is equal to or higher than the predetermined temperature (15 ° C.) is expected to be in summer when the supplied water temperature is equal to or higher than the predetermined temperature (15 ° C.) Since the amount of hot water used is not so large, there is little risk of running out of hot water. If the amount of hot water supplied is less than 150 L, it is considered that there is a sufficient amount of remaining hot water, and boiling is not performed. On the other hand, when the temperature of the supplied water is lower than the predetermined temperature (15 ° C.), it is expected that the temperature is in winter, etc., and the amount of hot water used is large. It is necessary to do it. Therefore, these controls can reduce unnecessary power consumption, especially in summer.
【0026】本実施の形態では、給水される水温が所定
温度(15℃)以上又は未満で通電を開始する給湯量に
差を設け、それぞれ150L・100Lに設定している
が、本発明はこれに限られるものではない。つまり、給
水される水温が所定温度(15℃)未満の場合よりも所
定温度(15℃)以上の場合の方が、通電を開始する所
定の給湯量を少なく設定することで、夏季における沸き
上げ回数を減らすことができ、発熱体9への通電量を削
減し電気代を安くすることを目的としている。In the present embodiment, the difference between the hot water supply amounts at which the supply of water starts when the temperature of the supplied water is equal to or higher than the predetermined temperature (15 ° C.) is set to 150 L and 100 L, respectively. It is not limited to. In other words, when the temperature of the supplied water is equal to or higher than the predetermined temperature (15 ° C.) than when the temperature is lower than the predetermined temperature (15 ° C.), the predetermined hot water supply amount at which the energization is started is set to be smaller, so that the boiling in summer The purpose is to reduce the number of times, reduce the amount of electricity supplied to the heating element 9, and reduce the electricity cost.
【0027】実施の形態3.図5は本発明の実施の形態
3に係わる電気温水器の制御フロー図である。なお、電
気温水器の基本的構成は実施の形態1と同様であるので
説明は省略する。また、実施の形態1と同一又は相当部
分には同じ符号を付し説明を省略する。Embodiment 3 FIG. 5 is a control flow chart of the electric water heater according to Embodiment 3 of the present invention. Note that the basic configuration of the electric water heater is the same as that of the first embodiment, and a description thereof will be omitted. Further, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
【0028】次に、本発明の実施の形態3に係わる電気
温水器の動作を図1及び図5に基づいて説明する。夜間
時間帯についての動作は実施の形態1と同様であり、以
下、実施の形態1と異なる部分について説明する。図
1、図5において、昼間時間帯である場合は(ステップ
S303のYES)、流量センサ7で給湯量を検出して
残湯量の算出を行う(ステップS304)。この残湯量
が湯切れを防止する所定量以下である場合には(ステッ
プS305のYES)、温度センサ9で給水水温の検出
を行うとともに(ステップS306)、発熱体8への通
電を開始する(ステップS307)。Next, the operation of the electric water heater according to Embodiment 3 of the present invention will be described with reference to FIGS. The operation in the night time zone is the same as that of the first embodiment, and the different points from the first embodiment will be described below. 1 and 5, when it is a daytime time zone (YES in step S303), the amount of hot water is detected by the flow rate sensor 7 to calculate the remaining hot water amount (step S304). When the remaining hot water amount is equal to or less than a predetermined amount for preventing running out of water (YES in step S305), the temperature sensor 9 detects the temperature of the water supply water (step S306), and starts energizing the heating element 8 (step S306). Step S307).
【0029】ここで、給水側配管3から供給される水温
が所定温度(15℃)以上の場合は(ステップS308
のYES)、昼間電力給電開始からの積算時間が5時間
以上(ステップS311のYES)、または、貯湯タン
ク2内の温水温度が沸き上げT3(50℃)以上(ステ
ップS312のYES)のうちのいずれかの条件を満た
すまで、発熱体8への通電を継続する。一方、給水側配
管3から供給される水温が所定温度(15℃)未満の場
合は(ステップS308のNO)、昼間電力給電開始か
らの積算時間が10時間以上(ステップS309のYE
S)、または、貯湯タンク2内の温水温度が沸き上げ温
度T2(70℃)以上(ステップS310のYES)の
うちのいずれかの条件を満たすまで、発熱体8への通電
を継続する。Here, when the temperature of the water supplied from the water supply side pipe 3 is equal to or higher than a predetermined temperature (15 ° C.) (step S308).
YES), the accumulated time from the start of daytime power supply is 5 hours or more (YES in step S311), or the temperature of hot water in the hot water storage tank 2 rises to T3 (50 ° C.) or more (YES in step S312). The energization of the heating element 8 is continued until one of the conditions is satisfied. On the other hand, if the temperature of the water supplied from the water supply side pipe 3 is lower than the predetermined temperature (15 ° C.) (NO in step S308), the integrated time from the start of the daytime power supply is 10 hours or more (YE in step S309).
S) Or, the energization of the heating element 8 is continued until the temperature of the hot water in the hot water storage tank 2 satisfies one of the conditions of the boiling temperature T2 (70 ° C.) or more (YES in step S310).
【0030】従って、本実施の形態では、季節の違いに
よる給水水温の温度差を考慮した制御を行っているた
め、給水水温の高い夏季においては、冬季よりも発熱体
8への通電時間を短く設定することで、電気代を削減し
ている。また、発熱体8への通電時間を貯湯タンク2内
の水温のみではなく、積算時間が所定時間を越えた場合
においても、通電を終了させることで、電気代の高い昼
間に長時間通電しつづけることの無い電気温水器を提供
する。Therefore, in the present embodiment, control is performed in consideration of the temperature difference of the feedwater temperature due to the season, so that in summer when the feedwater temperature is high, the power supply time to the heating element 8 is shorter than in winter. By setting, the electricity bill is reduced. In addition, when the current supply time to the heating element 8 is not limited to the water temperature in the hot water storage tank 2, even if the accumulated time exceeds a predetermined time, the power supply is terminated to continue the power supply for a long time in the daytime when the electricity bill is high. To provide an electric water heater without the need.
【0031】実施の形態4.図6は本発明の実施の形態
3に係わる電気温水器の制御フロー図である。なお、電
気温水器の基本的構成は実施の形態1と同様であるので
説明は省略する。また、実施の形態1と同一又は相当部
分には同じ符号を付し説明を省略する。Embodiment 4 FIG. FIG. 6 is a control flow chart of the electric water heater according to Embodiment 3 of the present invention. Note that the basic configuration of the electric water heater is the same as that of the first embodiment, and a description thereof will be omitted. Further, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
【0032】次に、本発明の実施の形態4に係わる電気
温水器の動作を図1及び図6に基づいて説明する。夜間
時間帯についての動作は実施の形態1と同様であり、以
下、実施の形態1と異なる部分について説明する。図
1、図6において、昼間時間帯である場合は(ステップ
S403のYES)、温度センサ9で給水水温の検出を
行い(ステップS404)、給水水温が所定温度以下か
否かを判定する(ステップS405)。実施の形態2で
説明したと同様に、水温が所定温度(15℃)以上の場
合(ステップS405のYES)、給湯量が150L以
上であれば、湯切れを防止するため、発熱体8に通電を
開始する(ステップS410)。Next, the operation of the electric water heater according to Embodiment 4 of the present invention will be described with reference to FIGS. The operation in the night time zone is the same as that of the first embodiment, and the different points from the first embodiment will be described below. In FIGS. 1 and 6, when it is a daytime period (YES in step S403), the temperature sensor 9 detects the temperature of the water supply water (step S404), and determines whether the temperature of the water supply water is equal to or lower than a predetermined temperature (step S404). S405). As described in the second embodiment, when the water temperature is equal to or higher than the predetermined temperature (15 ° C.) (YES in step S405), if the hot water supply amount is equal to or higher than 150L, the heating element 8 is energized to prevent running out of hot water. Is started (step S410).
【0033】一方、水温が所定温度(15℃)未満の場
合についても(ステップS405のNO)、給湯量が1
00L以上であれば、湯切れを防止するため、発熱体8
に通電を開始する(ステップS410)。On the other hand, also when the water temperature is lower than the predetermined temperature (15 ° C.) (NO in step S405),
If it is 00L or more, the heating element 8
Is started (step S410).
【0034】通電開始後は、実施の形態3と同様に、水
温が所定温度(15℃)以上の場合は(ステップS41
1のYES)、昼間電力給電開始からの積算時間が5時
間以上(ステップS412のYES)、または、貯湯タ
ンク2内の温水温度が沸き上げ温度T3(50℃)以上
(ステップS415のYES)のうちのいずれかの条件
を満たすまで、発熱体8への通電を継続する。一方、水
温が所定温度(15℃)未満の場合は(ステップS41
1のNO)、昼間電力給電開始からの積算時間が10時
間以上(ステップS413のYES)、または、貯湯タ
ンク2内の温水温度が沸き上げ温度T2(70℃)以上
(ステップS414のYES)のうちのいずれかの条件
を満たすまで、発熱体8への通電を継続する。After the start of energization, as in the third embodiment, when the water temperature is equal to or higher than the predetermined temperature (15 ° C.) (step S41).
1), when the accumulated time from the start of daytime power supply is 5 hours or more (YES in step S412), or when the temperature of the hot water in the hot water storage tank 2 is equal to or higher than the boiling temperature T3 (50 ° C.) (YES in step S415). The energization of the heating element 8 is continued until one of the conditions is satisfied. On the other hand, when the water temperature is lower than the predetermined temperature (15 ° C.) (step S41)
1), the integrated time from the start of daytime power supply is 10 hours or more (YES in step S413), or the hot water temperature in the hot water storage tank 2 is equal to or higher than the boiling temperature T2 (70 ° C.) (YES in step S414). The energization of the heating element 8 is continued until one of the conditions is satisfied.
【0035】従って、本実施の形態では、季節の違いに
よる給水水温の温度差を考慮した制御を行っているた
め、給水水温の高い夏季においては、冬季よりも発熱体
8への通電時間を短く設定することで、電気代を削減し
ている。また、発熱体8への通電時間を貯湯タンク2内
の水温のみではなく、積算時間が所定時間を越えた場合
においても、通電を終了させることで、電気代の高い昼
間に長時間通電しつづけることの無い電気温水器を提供
する。Therefore, in the present embodiment, control is performed in consideration of the temperature difference of the feedwater temperature due to the difference in the seasons. Therefore, in the summer time when the feedwater temperature is high, the power supply time to the heating element 8 is shorter than in the winter. By setting, the electricity bill is reduced. In addition, when the current supply time to the heating element 8 is not limited to the water temperature in the hot water storage tank 2, even if the accumulated time exceeds a predetermined time, the power supply is terminated to continue the power supply for a long time in the daytime when the electricity bill is high. To provide an electric water heater without the need.
【0036】[0036]
【発明の効果】以上の発明から明らかなように本発明に
係わる電気温水器は、昼間電力または夜間電力が給電さ
れる加熱手段と、該加熱手段で加熱した水を貯める貯湯
タンクと、該貯湯タンクと接続される給水側配管及び給
湯側配管と、前記貯湯タンク内の水の温度を検出する温
度センサと、外部への温水の給湯量を検出する流量セン
サと、通電時間帯が昼間電力または夜間電力のいずれが
給電される時間帯であるかを判別する制御手段とを備え
た電気温水器であって、該流量センサが所定以上の給湯
量を検出したときは前記加熱手段で水温を沸き上げ温度
まで上昇させ、かつ、昼間電力給電開始からの経過時間
を積算し、該経過時間が所定時間に到達した場合には加
熱手段への通電を停止するものである。この結果、電気
代の高い昼間時間帯の不必要な発熱体への通電をできる
だけ制限して電気代を安く抑え、かつ、本来の電気温水
器の目的である湯切れ防止を達成する電気温水器を提供
することができる。As is apparent from the above invention, the electric water heater according to the present invention comprises a heating means to which daytime power or nighttime power is supplied, a hot water storage tank for storing water heated by the heating means, and a hot water storage tank. A water supply side pipe and a hot water supply side pipe connected to the tank, a temperature sensor for detecting a temperature of water in the hot water storage tank, a flow rate sensor for detecting a hot water supply amount to the outside, and a power supply time zone during daytime power or Control means for determining which of the nighttime electric power is supplied, and when the flow rate sensor detects a hot water supply amount equal to or more than a predetermined amount, the water temperature is raised by the heating means. The temperature is raised to the raised temperature, the elapsed time from the start of power supply during the daytime is integrated, and when the elapsed time reaches a predetermined time, the power supply to the heating means is stopped. As a result, electric water heaters that limit unnecessary electricity supply to unnecessary heating elements during the daytime hours when electricity costs are high and keep electricity costs inexpensive, and achieve the original purpose of electric water heaters are prevention of running out of hot water. Can be provided.
【0037】また、本発明に係わる電気温水器は、昼間
電力が給電される時間帯の加熱手段による沸き上げを開
始する前記給湯量を前記温度センサの給水水温の検出値
に応じて変更するものである。この結果、電気代の高い
昼間時間帯の夏季における不必要な発熱体への通電をで
きるだけ制限して電気代を安く抑え、かつ、本来の電気
温水器の目的である湯切れ防止を達成する電気温水器を
提供することができる。In the electric water heater according to the present invention, the amount of hot water to be started to be heated by the heating means during a time period during which daytime power is supplied is changed according to a detected value of the temperature of the supplied water by the temperature sensor. It is. As a result, electric power is supplied to unnecessary heating elements in the summertime during the daytime when electricity costs are high so that electricity can be reduced as much as possible, and electricity can be prevented from running out of water, which is the original purpose of electric water heaters. A water heater can be provided.
【0038】また、本発明に係わる電気温水器は、昼間
電力が給電される時間帯の前記沸き上げ温度を前記温度
センサの給水水温の検出値に応じて変更するものであ
る。この結果、電気代の高い昼間時間帯の夏季における
不必要な発熱体への通電をできるだけ制限して電気代を
安く抑え、かつ、本来の電気温水器の目的である湯切れ
防止を達成する電気温水器を提供することができる。In the electric water heater according to the present invention, the boiling temperature in a time period during which daytime power is supplied is changed according to the detected value of the supply water temperature of the temperature sensor. As a result, electric power is supplied to unnecessary heating elements in the summertime during the daytime when electricity costs are high so that electricity can be reduced as much as possible, and electricity can be prevented from running out of water, which is the original purpose of electric water heaters. A water heater can be provided.
【図1】 この発明の実施形態1の構成を示す電気温水
器の構成図である。FIG. 1 is a configuration diagram of an electric water heater showing a configuration of Embodiment 1 of the present invention.
【図2】 この発明の実施形態1の構成を示す電気温水
器の制御ブロック図である。FIG. 2 is a control block diagram of the electric water heater showing the configuration of Embodiment 1 of the present invention.
【図3】 この発明の実施形態1の構成を示す電気温水
器の制御フロー図である。FIG. 3 is a control flow chart of the electric water heater showing the configuration of the first embodiment of the present invention.
【図4】 この発明の実施形態2の構成を示す電気温水
器の制御フロー図である。FIG. 4 is a control flow chart of an electric water heater showing a configuration of a second embodiment of the present invention.
【図5】 この発明の実施形態3の構成を示す電気温水
器の制御フロー図である。FIG. 5 is a control flow chart of an electric water heater showing a configuration of Embodiment 3 of the present invention.
【図6】 この発明の実施形態4の構成を示す電気温水
器の制御フロー図である。FIG. 6 is a control flow chart of an electric water heater showing a configuration of a fourth embodiment of the present invention.
【図7】 従来の電気温水器の構成図である。FIG. 7 is a configuration diagram of a conventional electric water heater.
【図8】 従来の電気温水器の制御フロー図である。FIG. 8 is a control flowchart of a conventional electric water heater.
1 電気温水器本体、 2 貯湯タンク、 3 給水側
配管、 4 給湯側配管、 5 減圧弁、 6 逃がし
弁、 7 流量センサ、 8 発熱体、 9温度セン
サ、 10 制御部、 11 操作部。1 Electric water heater main body, 2 Hot water storage tank, 3 Water supply side piping, 4 Hot water supply side piping, 5 Pressure reducing valve, 6 Relief valve, 7 Flow rate sensor, 8 Heating element, 9 Temperature sensor, 10 Control section, 11 Operation section.
Claims (3)
熱手段と、該加熱手段で加熱した水を貯める貯湯タンク
と、該貯湯タンクと接続される給水側配管及び給湯側配
管と、前記貯湯タンク内の水の温度を検出する温度セン
サと、外部への温水の給湯量を検出する流量センサと、
通電時間帯が昼間電力または夜間電力のいずれが給電さ
れる時間帯であるかを判別する制御手段とを備えた電気
温水器であって、該流量センサが所定以上の給湯量を検
出したときは前記加熱手段で水温を沸き上げ温度まで上
昇させ、かつ、昼間電力給電開始からの経過時間を積算
し、該経過時間が所定時間に到達した場合には加熱手段
への通電を停止することを特徴とする電気温水器。1. A heating means to which daytime or nighttime power is supplied, a hot water storage tank for storing water heated by the heating means, a water supply side pipe and a hot water supply side pipe connected to the hot water storage tank, and the hot water storage tank A temperature sensor for detecting the temperature of the water inside, a flow sensor for detecting the amount of hot water supplied to the outside,
A control unit that determines whether the energizing time period is a time period during which the daytime power or the nighttime power is supplied, and the flow rate sensor detects a predetermined amount or more of hot water supply. The water temperature is raised to the boiling temperature by the heating means, and the elapsed time from the start of power supply during daytime is integrated, and when the elapsed time reaches a predetermined time, the power supply to the heating means is stopped. And electric water heater.
による沸き上げを開始する前記給湯量は前記温度センサ
の給水水温の検出値に応じて変更することを特徴とする
請求項1記載の電気温水器。2. The amount of hot water to start boiling by the heating means during a time period when power is supplied during the day is changed in accordance with a detected value of feed water temperature of the temperature sensor. Electric water heater.
上げ温度は前記温度センサの給水水温の検出値に応じて
変更することを特徴とする請求項1記載の電気温水器。3. The electric water heater according to claim 1, wherein the boiling temperature in a time period during which daytime power is supplied is changed in accordance with a detected value of a feed water temperature of the temperature sensor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24101199A JP2001065988A (en) | 1999-08-27 | 1999-08-27 | Electric water heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24101199A JP2001065988A (en) | 1999-08-27 | 1999-08-27 | Electric water heater |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001065988A true JP2001065988A (en) | 2001-03-16 |
Family
ID=17068013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24101199A Pending JP2001065988A (en) | 1999-08-27 | 1999-08-27 | Electric water heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2001065988A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007139293A (en) * | 2005-11-17 | 2007-06-07 | Paloma Ind Ltd | Water heater |
JP2009115399A (en) * | 2007-11-07 | 2009-05-28 | Mitsubishi Electric Corp | Hot water supply system |
-
1999
- 1999-08-27 JP JP24101199A patent/JP2001065988A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007139293A (en) * | 2005-11-17 | 2007-06-07 | Paloma Ind Ltd | Water heater |
JP2009115399A (en) * | 2007-11-07 | 2009-05-28 | Mitsubishi Electric Corp | Hot water supply system |
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