JPH06249507A - Circulation and heat insulation type hot water supply device - Google Patents
Circulation and heat insulation type hot water supply deviceInfo
- Publication number
- JPH06249507A JPH06249507A JP3840093A JP3840093A JPH06249507A JP H06249507 A JPH06249507 A JP H06249507A JP 3840093 A JP3840093 A JP 3840093A JP 3840093 A JP3840093 A JP 3840093A JP H06249507 A JPH06249507 A JP H06249507A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water supply
- circulation
- flow rate
- pump
- 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
Links
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、循環保温式の給湯装
置に係り、特に循環保温時の循環流量を検出する流量セ
ンサと出湯検出用の流量センサを共用化するとともに、
少量の出湯であってもその出湯を的確に検出して、所望
の温度の湯水を速やかに供給できるようにした給湯装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation warming type hot water supply apparatus, and in particular, it shares a flow rate sensor for detecting a circulating flow rate at the time of circulation warming and a flow rate sensor for detecting hot water.
The present invention relates to a hot water supply device capable of accurately detecting even a small amount of hot water and quickly supplying hot water having a desired temperature.
【0002】[0002]
【従来の技術】給湯管路の末端側と熱交換器の入水側と
を戻り管路で接続して循環路を形成し、戻り管路等に介
設した循環ポンプを運転して循環路内の湯水を循環させ
ながら、循環路中の適所に設けた温度センサで循環路内
の湯温を検出し、検出した湯温が設定温度よりも低温で
あれば熱交換器で加熱し、設定温度に達すれば加熱を停
止することで、循環路内の湯水を適温に保ち、給湯管路
に接続された給湯栓から適温の湯水を速やかに出湯でき
るようにした循環保温式の給湯装置は、特公平3−28
664号公報で知られている。2. Description of the Related Art A circulation line is formed by connecting a terminal side of a hot water supply line and a water inlet side of a heat exchanger with a return line, and a circulation pump provided in the return line or the like is operated to operate in the circulation line. While circulating hot water, the temperature sensor installed in the appropriate place in the circulation path detects the temperature of the hot water in the circulation path. If the detected hot water temperature is lower than the set temperature, heat it with a heat exchanger to set the temperature. When the temperature reaches a certain level, the hot water in the circulation path is kept at an appropriate temperature, and the hot water supply with a suitable temperature can be quickly discharged from the hot water tap connected to the hot water supply pipeline. Fairness 3-28
It is known from Japanese Patent No. 664.
【0003】このような循環保温式の給湯装置では、給
湯栓からの出湯がなされたことを検出して、循環保温運
転状態から給湯運転状態へ切換える必要がある。給湯栓
の使用を検知するには、給湯管路と給湯栓の間に流量セ
ンサを設けることが考えられるが、給湯器本体から給湯
栓までの間に信号線を布設しなければならず施工性が悪
い。また、給湯栓を複数設ける場合は各給湯栓毎に対応
して複数の流量センサが必要となり、好ましくない。そ
こで、給水管路と戻り管路との接続部よりも給水管路の
上流側に流量センサを設け、この流量センサの出力に基
づいて給湯栓からの出湯を検出するようにしたものが実
用化されている。In such a circulation warming type hot water supply apparatus, it is necessary to detect that hot water has been discharged from the hot water tap and switch from the circulation warming operation state to the hot water supply operation state. In order to detect the use of the hot water tap, it is conceivable to install a flow rate sensor between the hot water supply pipe and the hot water tap, but a signal line must be laid between the hot water heater body and the hot water tap, and workability is improved. Is bad. Further, when a plurality of hot water taps are provided, a plurality of flow rate sensors are required for each hot water tap, which is not preferable. Therefore, a flow sensor was installed on the upstream side of the water supply pipe rather than the connection between the water supply pipe and the return pipe, and hot water from the hot water tap was detected based on the output of this flow sensor. Has been done.
【0004】[0004]
【発明が解決しようとする課題】一方、循環加熱を効率
よく制御するために、循環路内の熱交換器の入水側管路
に流量センサと水温センサを設け、各センサで検出した
循環流量と入水温度、ならびに、温度設定器等で設定さ
れた設定温度とに基づいて保温加熱に必要な熱量を算出
して、熱交換器内のバーナの間欠燃焼周期を制御する構
成にすると、入水管路と戻り管路との接続部の上流側な
らびに下流側にそれぞれ流量センサを設けることにな
る。On the other hand, in order to efficiently control the circulation heating, a flow rate sensor and a water temperature sensor are provided in the water inlet side conduit of the heat exchanger in the circulation path, and the circulation flow rate detected by each sensor is adjusted. When the heat quantity required for heat retention heating is calculated based on the incoming water temperature and the set temperature set by the temperature setting device, etc., the burner in the heat exchanger is configured to control the intermittent combustion cycle. A flow rate sensor is provided on each of the upstream side and the downstream side of the connection portion between the and the return pipeline.
【0005】そこで、循環路内に設けた流量センサを用
いて給湯栓の使用すなわち出湯を検出することを考える
と、出湯と判断するための流量は循環保温運転時の循環
流量値よりも大きな値に設定することになるが、保温加
熱を行なっていない間は循環ポンプの運転を停止させて
節電や運転音の低減を図るようにした場合、出湯栓から
の出湯量が少量の場合は給湯栓の使用を検出できなくな
る。また、出湯管路や戻り管路の配管長は各設置場所毎
に異なるため、循環ポンプに能力が一定であっても循環
流量は設置場所毎に異なる。このため、配管長が短い場
合の循環流量よりも高めに出湯と判断するための流量を
設定しないと、誤検出を生ずることとなり、小流量の出
湯を検出することが困難となる。Therefore, considering the use of a hot water tap, that is, the detection of hot water discharge using a flow rate sensor provided in the circulation path, the flow rate for determining the hot water discharge is a value larger than the circulation flow rate value during the circulation heat insulation operation. However, if the circulation pump is stopped while heat retention and heating are not being performed to save electricity and reduce operating noise, if the hot water output from the hot water tap is small, the hot water tap Can no longer detect the use of. Further, since the pipe lengths of the hot water supply pipe and the return pipe are different for each installation place, the circulation flow rate is different for each installation place even if the circulation pump has a constant capacity. Therefore, unless the flow rate for determining hot water discharge is set higher than the circulation flow rate when the pipe length is short, erroneous detection occurs, and it becomes difficult to detect a small hot water flow.
【0006】この発明はこのような課題を解決するため
なされたもので、単一の流量センサで循環保温時の流量
を検出するとともに、少量の出湯であっても給湯栓の使
用を確実に検出して給湯状態へ切換えることのできる循
環保温式の給湯装置を提供することを目的とする。ま
た、配管長によって循環保温時の循環流量が異なって
も、所定量の出湯により給湯栓の使用を検出できる循環
保温式の給湯装置を提供することを第2の目的とする。The present invention has been made in order to solve such a problem, and detects the flow rate at the time of circulating heat retention with a single flow rate sensor, and reliably detects the use of a hot water tap even with a small amount of hot water. It is an object of the present invention to provide a circulation warming type hot water supply device capable of switching to a hot water supply state by means of the above. It is a second object of the present invention to provide a circulation warming type hot water supply device which can detect the use of a hot water tap by tapping a predetermined amount of hot water even if the circulation flow rate at the time of circulation warming varies depending on the pipe length.
【0007】[0007]
【課題を解決するための手段】前記課題を解決するため
この発明に係る循環保温式給湯装置は、給湯管路中途部
と給水管路を戻り管路で連絡して、給水管路、熱交換
器、給湯管路、戻り管路により環状管路を形成し、給湯
管路に接続された給湯栓が使用されていない非給湯状態
では、戻り管路に介設した循環ポンプを運転して循環管
路内の湯水を循環させながら熱交換器で加熱する循環保
温運転を適宜行なうことで、循環管路内の湯温を所定温
度範囲に保つようにした循環保温式給湯装置において、
戻り管路を除く循環管路中の任意の位置に設けた流量セ
ンサの出力に基づいて給湯栓からの出湯を判断する給湯
使用検出手段を備えるとともに、この給湯使用検出手段
は循環ポンプ運転状態と停止状態とで給湯使用と判断す
るための流量値を異ならしめたことを特徴とする。In order to solve the above-mentioned problems, a circulation warming type hot water supply device according to the present invention connects a midway part of a hot water supply pipe and a water supply pipe with a return pipe to provide a water supply pipe and heat exchange. An annular pipe is formed by the water heater, the hot water supply pipe, and the return pipe, and when the hot water tap connected to the hot water supply pipe is not in use, the circulation pump installed in the return pipe is operated for circulation. In a circulation warming type hot water supply device that keeps the hot water temperature in the circulation pipeline within a predetermined temperature range by appropriately performing a circulation warming operation in which the hot water is heated in the heat exchanger while circulating the hot water in the pipeline.
The hot water supply usage detecting means for determining hot water discharge from the hot water tap based on the output of the flow rate sensor provided at any position in the circulation pipeline except the return pipeline is provided. It is characterized in that the flow rate values for determining whether hot water is used are different between the stopped state and the hot state.
【0008】なお、給湯使用検出手段は、循環保温運転
中の循環流量に基づいて循環ポンプ運転状態の給湯使用
と判断する流量値を設定する構成としてもよい。The hot water supply usage detecting means may be configured to set a flow rate value for determining hot water usage in the circulating pump operating state based on the circulation flow rate during the circulation heat retention operation.
【0009】[0009]
【作用】戻り管路を除く循環管路中の任意の位置に流量
センサを設けることで、循環ポンプ運転時の循環流量、
循環ポンプ停止時の出湯流量、循環ポンプ運転時に給湯
栓が使用された場合の循環流量と出湯流量の合計流量の
いずれも検出できる。給湯使用検出手段は、循環ポンプ
運転時と停止時とで給湯使用と判断する流量値を異なら
しめたので、循環ポンプ運転時は循環流量に対して所定
量多い流量を検出した時に給湯使用と判断し、循環ポン
プ停止時は所定の流量を検出した時に給湯使用と判断す
ることができる。すなわち、循環ポンプの運転状態にか
かわらず、少量の出湯であってもそれを確実に検出でき
る。[Operation] By providing the flow rate sensor at any position in the circulation pipeline except the return pipeline, the circulation flow rate during operation of the circulation pump,
It is possible to detect both the hot water flow rate when the circulation pump is stopped, and the total flow rate of the hot water flow rate and the hot water flow rate when the hot water tap is used during the circulation pump operation. The hot water supply usage detection means determines that hot water is used when the circulation pump is operating and when it is stopped. However, when the circulation pump is stopped, it can be determined that hot water is being used when a predetermined flow rate is detected. That is, it is possible to reliably detect even a small amount of hot water, regardless of the operating state of the circulation pump.
【0010】また、循環ポンプ運転時の循環流量に基づ
いて循環ポンプ運転時の給湯使用判断流量を設定するこ
とによって、循環流量の大小にかかわらず給湯栓からの
出湯量が所定量になった時点で、給湯栓の使用を検出で
きる。Further, by setting the hot water supply use judgment flow rate during the circulation pump operation based on the circulation flow rate during the circulation pump operation, the amount of hot water discharged from the hot water tap reaches a predetermined amount regardless of the circulation flow rate. Thus, the use of the hot water tap can be detected.
【0011】[0011]
【実施例】以下、この発明の実施例を添付図面に基づい
て説明する。図1はこの発明に係る循環保温式の給湯装
置の全体構成図である。この給湯装置1は、給湯栓2が
開けられた給湯状態では、給水管路3から供給される水
を熱交換器4で加熱し、給湯管路5を介して給湯栓2か
ら湯水を供給するとともに、給湯栓2が閉じられた非給
湯状態では給湯管路5の末端側と給水管路3とを接続す
る戻り管路6に介設した循環ポンプ7を運転すること
で、熱交換器4、給湯管路5、戻り管路6、給水管路3
と戻り管路6の接続部より下流側の給水管路3aからな
る循環管路8内の湯水を循環させながら熱交換器4で加
熱し、循環管路8内の湯水を所定の温度に保つよう構成
している。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a circulation warming type hot water supply apparatus according to the present invention. In the hot water supply device 1 in a hot water supply state in which the hot water tap 2 is opened, the water supplied from the water supply pipe 3 is heated by the heat exchanger 4, and the hot water is supplied from the hot water tap 2 via the hot water supply pipe 5. At the same time, in the non-hot water supply state in which the hot water supply tap 2 is closed, the circulation pump 7 provided in the return pipe 6 that connects the terminal side of the hot water supply pipe 5 and the water supply pipe 3 is operated, so that the heat exchanger 4 , Hot water supply line 5, return line 6, water supply line 3
The hot water in the circulation pipe 8 consisting of the water supply pipe 3a on the downstream side of the connecting portion of the return pipe 6 and the heating pipe 4 is heated while being circulated, and the hot water in the circulation pipe 8 is kept at a predetermined temperature. Is configured as follows.
【0012】コントローラ9は、給水管路3と戻り管路
6の接続部より下流側の給水管路3aに介設された温度
センサ10ならびに流量センサ11からの入水温ならび
に流量に係る信号10a,11aと、保温運転スイッチ
12および温度設定器13の設定温度を入力とし、ガス
配管14に介設したガス開閉弁15とガス比例弁16、
およびバーナ17へ燃焼用空気を供給するためのファン
18、ならびに循環ポンプ7の運転を制御する。The controller 9 includes a temperature sensor 10 and a flow sensor 11 provided in a water supply pipe 3a downstream of a connecting portion between the water supply pipe 3 and the return pipe 6, and signals 10a relating to an incoming water temperature and a flow rate from a flow sensor 11. 11a and the set temperature of the heat retention operation switch 12 and the temperature setter 13 are input, and the gas opening / closing valve 15 and the gas proportional valve 16 provided in the gas pipe 14 are provided.
The operation of the fan 18 for supplying combustion air to the burner 17 and the circulation pump 7 is controlled.
【0013】図2はコントローラの機能ブロック構成図
である。コントローラ9は、循環保温制御手段21と、
燃焼制御手段22と、給湯使用検出手段23とからな
る。FIG. 2 is a functional block configuration diagram of the controller. The controller 9 includes a circulation heat retention control means 21 and
It comprises a combustion control means 22 and a hot water supply usage detection means 23.
【0014】循環保温制御手段21は、保温運転スイッ
チ12の設定状態を定期的に監視し、保温運転が要求さ
れている場合は、温度センサ10で検出した湯水温度T
Cと温度設定器13で設定された設定温度TSとを比較
し、設定温度TSに対して湯水温度TCが所定温度以上
低下している時は保温加熱要求21aを燃焼制御手段2
2へ供給するとともに、循環ポンプ運転指令21bを出
力して循環ポンプ7を運転させ、湯水温度TCが設定温
度TSに達した時点で保温加熱要求21aならびに循環
ポンプ運転指令21bの出力を停止する。また、この循
環保温制御手段21は、給湯使用検出手段23から給湯
加熱要求23aが供給された場合は、保温加熱要求21
aならびに循環ポンプ運転指令21bの出力を停止す
る。The circulation heat retention control means 21 periodically monitors the setting state of the heat retention operation switch 12, and when the heat retention operation is requested, the hot water temperature T detected by the temperature sensor 10 is detected.
C and the set temperature TS set by the temperature setter 13 are compared, and when the hot and cold water temperature TC is lower than the set temperature TS by a predetermined temperature or more, the combustion control means 2 issues a heat retention heating request 21a.
2, the circulation pump operation command 21b is output to operate the circulation pump 7, and when the hot water temperature TC reaches the set temperature TS, the heat retention heating request 21a and the circulation pump operation command 21b are stopped. Further, when the hot water supply heating request 23a is supplied from the hot water supply use detection means 23, the circulation heat retention control means 21 keeps the heat retention heating request 21.
a and the output of the circulation pump operation command 21b are stopped.
【0015】燃焼制御手段22は、保温加熱要求21a
に基づく間欠燃焼制御と、給湯加熱要求23aに基づく
比例燃焼制御を行なうよう構成している。保温加熱要求
21aが与えられると燃焼制御手段22は、設定温度T
Sと湯水温度TCとの温度差に、流量センサ11で検出
した流量Qを乗じて循環保温時の必要熱量を算出し、予
め登録したテーブル等を参照して間欠燃焼のオン時間な
らびにオフ時間を決定し、ファン18の運転ならびにガ
ス比例弁16を例えば最小開度に保持させた状態でガス
開閉弁15の開閉を制御してバーナ17を間欠燃焼させ
る。The combustion control means 22 uses the heat retention heating request 21a.
The intermittent combustion control based on the above and the proportional combustion control based on the hot water supply heating request 23a are performed. When the heat retention heating request 21a is given, the combustion control means 22 sets the set temperature T
The temperature difference between S and the hot and cold water temperature TC is multiplied by the flow rate Q detected by the flow rate sensor 11 to calculate the necessary heat quantity during circulation heat retention, and the on-time and off-time of the intermittent combustion are determined by referring to a table registered in advance. The burner 17 is intermittently burned by controlling the operation of the fan 18 and the opening / closing of the gas on-off valve 15 while the gas proportional valve 16 is kept at the minimum opening degree.
【0016】給湯加熱要求23aが与えられると燃焼制
御手段22は、ファン18および開閉弁15を燃焼状態
へ駆動するとともに、設定温度TSと湯水温度TCとの
温度差に、流量センサ11で検出した給湯時の流量Qを
乗じて給湯時の必要熱量を算出し、算出した必要熱量を
発生させるようガス比例弁16の開度を調節する。な
お、燃焼制御手段22は、算出した必要熱量が比例燃焼
制御での最小熱量以下の場合は、燃焼を一時停止、もし
くは間欠燃焼制御を行なうことで小流量出湯時に出湯温
度が高くなりすぎるのを防止する構成としている。When the hot water supply heating request 23a is given, the combustion control means 22 drives the fan 18 and the open / close valve 15 to the combustion state, and detects the temperature difference between the set temperature TS and the hot water temperature TC by the flow rate sensor 11. The required heat quantity for hot water supply is calculated by multiplying the flow rate Q during hot water supply, and the opening of the gas proportional valve 16 is adjusted so as to generate the calculated necessary heat quantity. If the calculated required heat quantity is less than or equal to the minimum heat quantity in the proportional combustion control, the combustion control means 22 may temporarily stop the combustion or perform intermittent combustion control to prevent the hot water temperature from becoming too high at a small flow rate. It is configured to prevent.
【0017】給湯使用検出手段23は、給湯使用判断手
段24と、ポンプ停止時の給湯判断流量記憶手段25
と、ポンプ運転時の給湯判断流量記憶手段26と、判断
流量更新手段27と、暫定循環流量記憶手段28とから
なる。The hot water supply use detecting means 23 includes a hot water supply use determining means 24 and a hot water supply determining flow rate storing means 25 when the pump is stopped.
And a hot water supply determination flow rate storage means 26 during pump operation, a determination flow rate update means 27, and a temporary circulation flow rate storage means 28.
【0018】給湯使用判断手段24は、循環ポンプ運転
指令21bが出力されていない状態、すなわち循環ポン
プ7が運転されていない状態では、ポンプ停止時の給湯
判断流量記憶手段25から供給されるポンプ停止時の給
湯使用判断流量QPoffと流量センサ11で検出した
流量Qとを比較し、検出流量Qが給湯使用判断流量QP
offを越えているときは、給湯栓2からの出湯がなさ
れている給湯使用状態と判断し、給湯加熱要求23aを
出力する。また、循環ポンプ運転指令21bが出力され
ている状態、すなわち循環ポンプ7が運転されている状
態では、ポンプ運転時の給湯判断流量記憶手段26から
供給されるポンプ運転時の給湯使用判断流量QPonと
流量センサ11で検出した流量Qとを比較し、検出流量
Qが給湯使用判断流量QPonを越えているときは、給
湯栓2からの出湯がなされている給湯使用状態と判断
し、給湯加熱要求23aを出力する。When the circulating pump operation command 21b is not output, that is, when the circulating pump 7 is not operating, the hot water supply use determining means 24 stops the pump supplied from the hot water supply determining flow rate storing means 25 when the pump is stopped. The hot water supply use determination flow rate QPoff at the time and the flow rate Q detected by the flow rate sensor 11 are compared, and the detected flow rate Q is the hot water supply use determination flow rate QP.
When it exceeds off, it is judged that the hot water is being used from the hot water tap 2, and the hot water heating request 23a is output. When the circulation pump operation command 21b is output, that is, when the circulation pump 7 is operating, the hot water supply use determination flow rate QPon during pump operation supplied from the hot water supply determination flow rate storage unit 26 during pump operation is set. The flow rate Q detected by the flow rate sensor 11 is compared, and when the detected flow rate Q exceeds the hot water supply use determination flow rate QPon, it is determined that hot water is being used from the hot water tap 2 and the hot water supply heating request 23a. Is output.
【0019】ポンプ停止時の給湯判断流量記憶手段25
は、例えばROM等を用いて構成しており、ポンプ停止
時の給湯判断流量として例えば毎分1〜1.5リットル
程度の流量データを予め登録している。なお、このポン
プ停止時の給湯判断流量記憶手段25は、数値データを
設定できる例えばデジタルスイッチ等を用いて、その設
定値を適宜設定できるようにしてもよい。Hot water supply determination flow rate storage means 25 when the pump is stopped
Is configured by using, for example, a ROM, and the flow rate data of about 1 to 1.5 liters per minute is registered in advance as the hot water supply determination flow rate when the pump is stopped. It should be noted that the hot water supply determination flow rate storage means 25 when the pump is stopped may use a digital switch or the like capable of setting numerical data so that the set value can be appropriately set.
【0020】暫定循環流量記憶手段28は、例えばRO
M等を用いて構成しており、給湯管路5および戻り管路
6の配設長が最短のときの循環流量を暫定循環流量とし
て予め登録している。この暫定循環流量値は、循環ポン
プ7の能力に対応して設定される。本実施例では毎分4
〜5リットル程度の値としている。The temporary circulation flow rate storage means 28 is, for example, RO
The circulation flow rate when the hot water supply pipe 5 and the return pipe 6 are arranged in the shortest length is registered in advance as a temporary circulation flow amount. This provisional circulation flow rate value is set according to the capacity of the circulation pump 7. In this embodiment, 4 per minute
The value is about 5 liters.
【0021】ポンプ運転時の給湯判断流量記憶手段26
はRAM等を用いて構成しており、その判断流量は判断
流量更新手段27によって書き換え可能としている。判
断流量更新手段27は、暫定循環流量記憶手段28に記
憶された暫定循環流量値に対して、ポンプ停止時の給湯
判断流量記憶手段25に記憶されたポンプ停止時の給湯
判断流量QPoffを加算した値を、ポンプ運転時の給
湯判断流量記憶手段26へまず書き込む。Hot water supply determination flow rate storage means 26 during pump operation
Is configured using a RAM or the like, and the determination flow rate can be rewritten by the determination flow rate updating means 27. The determination flow rate updating means 27 adds the hot water supply determination flow rate QPoff when the pump is stopped, which is stored in the hot water supply determination flow rate storage means 25 when the pump is stopped, to the provisional circulation flow rate value stored in the temporary circulation flow rate storage means 28. The value is first written in the hot water supply determination flow rate storage means 26 during pump operation.
【0022】そして、判断流量更新手段27は、循環保
温運転がなされていることを循環ポンプ運転指令21b
に基づいて検知すると、流量センサ11で検出した流量
を監視し、検出流量Qが所定の時間に亘って所定の変動
幅内になったときに、その時の平均流量を算出し、算出
した平均流量にポンプ停止時の給湯判断流量を加算して
得た値を、ポンプ運転時の給湯判断流量記憶手段26へ
書き込むよう構成している。なお、ポンプ停止時の給湯
判断流量QPoffを加算するのではなく、予め設定し
た流量値を加算するようにしてもよい。Then, the judgment flow rate updating means 27 indicates that the circulation heat retention operation is being performed by the circulation pump operation command 21b.
When the detected flow rate Q is within a predetermined fluctuation range over a predetermined time, the average flow rate at that time is calculated, and the calculated average flow rate is detected. A value obtained by adding the hot water supply determination flow rate when the pump is stopped is written in the hot water supply determination flow rate storage means 26 during pump operation. Instead of adding the hot water supply determination flow rate QPoff when the pump is stopped, a preset flow rate value may be added.
【0023】このように、循環ポンプ7の運転状態に応
じて給湯使用と判断するための流量値を異ならせる構成
としたので、単一の流量センサ11を用いて循環流量の
検出を行なうとともに、給湯栓2からの出湯が少量であ
ってもその使用を確実に検出して、給湯加熱制御を行な
うことができる。また、循環保温運転時に循環流量を検
出し、検出した循環流量に基づいて循環ポンプ運転時の
給湯使用流量を設定する構成としたので、給湯装置の設
置条件によって循環ポンプ運転時の流量が異なる場合で
も、給湯栓2から所定量の出湯がなされることで、給湯
使用を確実に検出することができる。As described above, since the flow rate value for determining whether hot water is used is varied according to the operating state of the circulation pump 7, the circulation flow rate is detected by using the single flow rate sensor 11. Even if the amount of hot water discharged from the hot water tap 2 is small, its use can be reliably detected and hot water heating control can be performed. In addition, the circulation flow rate is detected during circulation warming operation, and the hot water supply flow rate used during circulation pump operation is set based on the detected circulation flow rate.Therefore, when the flow rate during circulation pump operation differs depending on the installation conditions of the water heater. However, by using the hot water tap 2 to discharge a predetermined amount of hot water, it is possible to reliably detect the use of hot water.
【0024】なお、この実施例では流量センサ11を熱
交換器4の入水側に設けたが、流量センサ11は出湯管
路5側に設けてもよい。また、循環流量に所定の流量を
加算した値をポンプ運転時の給湯使用判断流量記憶手段
26へ記憶させる構成を示したが、循環流量を記憶して
おいて、この循環流量に対して所定量だけ多い流量を検
出したときに給湯使用と判断する構成としてもよい。Although the flow rate sensor 11 is provided on the water inlet side of the heat exchanger 4 in this embodiment, the flow rate sensor 11 may be provided on the hot water outlet pipe 5 side. Further, the configuration is shown in which the value obtained by adding the predetermined flow rate to the circulation flow rate is stored in the hot water supply use determination flow rate storage means 26 during pump operation. However, the circulation flow rate is stored and a predetermined amount with respect to this circulation flow rate is stored. The configuration may be such that it is determined that hot water is being used when a very large flow rate is detected.
【0025】[0025]
【発明の効果】以上説明したように請求項1に係る循環
保温式給湯装置は、戻り管路を除く循環管路中の任意の
位置に流量センサを設けたので、循環ポンプ運転時の循
環流量、循環ポンプ停止時の出湯流量、循環ポンプ運転
時に給湯栓が使用された場合の循環流量と出湯流量の合
計流量のいずれも検出でき、給湯使用検出手段は、循環
ポンプ運転時と停止時とで給湯使用と判断する流量値を
異ならしめたので、循環ポンプ運転時は循環流量に対し
て所定量多い流量を検出した時に給湯使用と判断し、循
環ポンプ停止時は所定の流量を検出した時に給湯使用と
判断することができる。すなわち、循環ポンプの運転状
態にかかわらず、少量の出湯であってもそれを確実に検
出して、給湯運転状態へ切換えることができる。As described above, in the circulation warming type hot water supply apparatus according to the first aspect, since the flow rate sensor is provided at any position in the circulation pipeline except the return pipeline, the circulation flow rate during the circulation pump operation. The flow rate of hot water when the circulation pump is stopped, and the total flow rate of the circulation flow and hot water flow when the hot water tap is used during operation of the circulation pump can be detected.The hot water use detection means can be used when the circulation pump is operating and when it is stopped. Since the flow rate values used for hot water supply are different, it is determined that hot water is used when the circulation pump is operating when a flow rate higher than the circulating flow rate is detected. When the circulation pump is stopped, hot water is used when the predetermined flow rate is detected. It can be judged to be used. That is, regardless of the operating state of the circulation pump, even a small amount of hot water can be reliably detected and switched to the hot water supply operating state.
【0026】また、循環ポンプ運転時の循環流量に基づ
いて循環ポンプ運転時の給湯使用を判断する構成とした
ので、給湯管路や戻り管路の管路長が異なることで循環
流量が異なっても、給湯栓からの出湯量が所定量になっ
た時点で、給湯栓の使用を的確に検出できる。Further, since the hot water supply use is determined based on the circulation flow rate during the circulation pump operation, the circulation flow rate varies depending on the hot water supply pipe line and the return pipe line. Also, when the amount of hot water discharged from the hot water tap reaches a predetermined amount, the use of the hot water tap can be accurately detected.
【図1】この発明に係る循環式給湯装置の全体構成図FIG. 1 is an overall configuration diagram of a circulating water heater according to the present invention.
【図2】この発明に係る循環式給湯装置の機能ブロック
構成図FIG. 2 is a functional block configuration diagram of a circulating water heater according to the present invention.
1 給湯装置 2 給湯栓 3 給水管路 4 熱交換器 5 給湯管路 6 戻り管路 7 循環ポンプ 8 循環管路 9 コントローラ 11 流量センサ 23 給湯使用検出手段 24 給湯使用判断手段 25 ポンプ停止時の給湯判断流量記憶手段 26 ポンプ運転時の給湯判断流量記憶手段 27 判断流量更新手段 1 Hot Water Supply Device 2 Hot Water Supply Plug 3 Water Supply Pipeline 4 Heat Exchanger 5 Hot Water Supply Pipeline 6 Return Pipeline 7 Circulation Pump 8 Circulation Pipeline 9 Controller 11 Flow Rate Sensor 23 Hot Water Supply Use Detection Means 24 Hot Water Supply Use Judgment Means 25 Hot Water Supply Judgment flow rate storage means 26 Hot water supply judgment flow rate storage means during pump operation 27 Judgment flow rate updating means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 雅紀 福岡県北九州市小倉北区中島2丁目1番1 号 東陶機器株式会社内 (72)発明者 高田 哲朗 兵庫県神戸市東灘区魚崎浜町43番1号 日 本ユプロ株式会社内 (72)発明者 三浦 信二 兵庫県神戸市東灘区魚崎浜町43番1号 日 本ユプロ株式会社内 (72)発明者 中野 清隆 兵庫県神戸市東灘区魚崎浜町43番1号 日 本ユプロ株式会社内 (72)発明者 平郡 光 兵庫県神戸市東灘区魚崎浜町43番1号 日 本ユプロ株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Masaki Nakamura Inventor, Masaki Nakamura, 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu, Fukuoka Prefecture (72) Tetsuro Takada 43, Uozakihama-cho, Higashinada-ku, Kobe, Hyogo Prefecture No. 1 Nihon Yupro Co., Ltd. (72) Inventor Shinji Miura 43 Uozakihama-cho, Higashinada-ku, Kobe City, Hyogo Prefecture No. 1 Nihon Yupro Co., Ltd. (72) Inventor Kiyotaka Nakano 43 Uozakihama-cho, Higashinada-ku, Kobe City, Hyogo Prefecture No. 1 within Nihon Yupro Co., Ltd. (72) Inventor Hikaru Hira-gun 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Within Nihon Yupro Co., Ltd.
Claims (2)
連絡して、給水管路、熱交換器、給湯管路、戻り管路に
より環状管路を形成し、給湯管路に接続された給湯栓が
使用されていない非給湯状態では、戻り管路に介設した
循環ポンプを運転して循環管路内の湯水を循環させなが
ら熱交換器で加熱する循環保温運転を適宜行なうこと
で、循環管路内の湯温を所定温度範囲に保つようにした
循環保温式給湯装置において、戻り管路を除く循環管路
中の任意の位置に設けた流量センサの出力に基づいて給
湯栓からの出湯を判断する給湯使用検出手段を備えると
ともに、この給湯使用検出手段は循環ポンプ運転状態と
停止状態とで給湯使用と判断するための流量値を異なら
しめたことを特徴とする循環保温式給湯装置。1. A hot water supply conduit is connected to a midway portion of the hot water supply conduit by a return conduit to form an annular conduit by the water supply conduit, the heat exchanger, the hot water supply conduit, and the return conduit. In the non-hot water supply state where the connected hot water tap is not used, the circulation pump installed in the return pipe is operated to circulate the hot and cold water in the circulation pipe, and the circulation heat retention operation of heating with the heat exchanger is appropriately performed. Therefore, in the circulation warming type hot water supply device that keeps the hot water temperature in the circulation pipeline within a predetermined temperature range, the hot water is supplied based on the output of the flow rate sensor provided at any position in the circulation pipeline except the return pipeline. A hot water supply use detecting means for judging hot water supply from the tap is provided, and the hot water supply use detecting means is characterized by different flow rate values for judging hot water use depending on whether the circulating pump is operating or stopped. Water heater.
運転中の循環流量に基づいて循環ポンプ運転状態の給湯
使用と判断する流量値を設定するよう構成したことを特
徴とする請求項1記載の循環保温式給湯装置。2. The hot water supply use detecting means is configured to set a flow rate value for determining hot water use in the circulation pump operating state based on the circulation flow rate during the circulation heat retention operation. Circulation warm water heater.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03840093A JP3171979B2 (en) | 1993-02-26 | 1993-02-26 | Circulating warm water heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03840093A JP3171979B2 (en) | 1993-02-26 | 1993-02-26 | Circulating warm water heater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06249507A true JPH06249507A (en) | 1994-09-06 |
JP3171979B2 JP3171979B2 (en) | 2001-06-04 |
Family
ID=12524250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03840093A Expired - Fee Related JP3171979B2 (en) | 1993-02-26 | 1993-02-26 | Circulating warm water heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3171979B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08121799A (en) * | 1994-10-24 | 1996-05-17 | Toto Ltd | Water heater with instantaneous heating function |
JPH08159501A (en) * | 1994-12-05 | 1996-06-21 | Toto Ltd | Hot-water supply device |
JP2004286397A (en) * | 2003-03-25 | 2004-10-14 | Rinnai Corp | Hot-water supply device with instantaneous hot-water supply function |
JP2021085549A (en) * | 2019-11-25 | 2021-06-03 | 株式会社ノーリツ | Hot water supply device |
US11639813B2 (en) | 2019-06-24 | 2023-05-02 | Noritz Corporation | Water heating apparatus and water heating system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109931707B (en) * | 2017-12-19 | 2020-10-27 | 宁波方太厨具有限公司 | Anti-blocking method for gas water heater |
-
1993
- 1993-02-26 JP JP03840093A patent/JP3171979B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08121799A (en) * | 1994-10-24 | 1996-05-17 | Toto Ltd | Water heater with instantaneous heating function |
JPH08159501A (en) * | 1994-12-05 | 1996-06-21 | Toto Ltd | Hot-water supply device |
JP2004286397A (en) * | 2003-03-25 | 2004-10-14 | Rinnai Corp | Hot-water supply device with instantaneous hot-water supply function |
US11639813B2 (en) | 2019-06-24 | 2023-05-02 | Noritz Corporation | Water heating apparatus and water heating system |
JP2021085549A (en) * | 2019-11-25 | 2021-06-03 | 株式会社ノーリツ | Hot water supply device |
Also Published As
Publication number | Publication date |
---|---|
JP3171979B2 (en) | 2001-06-04 |
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