JP2001296053A

JP2001296053A - Hot water storage type hot water heater source device

Info

Publication number: JP2001296053A
Application number: JP2000110165A
Authority: JP
Inventors: Toru Fukuchi; 徹福知; Hisashige Sakai; 寿成酒井; Yasuto Hashizume; 康人橋詰; Toshihiro Kawachi; 河内　　敏弘; Yasushi Fujikawa; 泰藤川; Yoshio Fujimoto; 藤本　　善夫; Kenji Dangishiyo; 謙治談議所; Tomoya Sakiishi; 智也崎石; Kenichi Tanogashira; 健一田之頭; Kazuya Yamaguchi; 和也山口
Original assignee: Saibu Gas Co Ltd; Osaka Gas Co Ltd; Tokyo Gas Co Ltd; Harman Co Ltd; Toho Gas Co Ltd
Current assignee: Saibu Gas Co Ltd; Osaka Gas Co Ltd; Tokyo Gas Co Ltd; Harman Co Ltd; Toho Gas Co Ltd
Priority date: 2000-04-12
Filing date: 2000-04-12
Publication date: 2001-10-26
Anticipated expiration: 2020-04-12
Also published as: JP4169454B2

Abstract

PROBLEM TO BE SOLVED: To enable an operating capability of a heat pump type heater to be sufficiently utilized and further enable hot water to be efficiently stored. SOLUTION: There is provided a hot water storage type hot water feeding heat source device comprised of a hot water circulating means E for circulating hot water under a hot water storing operation state in which hot water at the bottom part of a hot water storage tank 1 is supplied to the upper part of the hot water storage tank after hot water is heated by a heat pump type heater 3; a circulation control means C for controlling either increasing or decreasing a circulating amount of hot water with the hot water circulating means to keep a boiling-up temperature of hot water by the heat pump type heater at a stored hot water target temperature range; and a heat pump operation control means for controlling a rotating speed of a refrigerant compressor in such a way that a refrigerant pressure at the heat pump type heater may become a set target pressure. The circulation controlling means sets a circulating amount of hot water to an operation starting set amount at the hot water storing initial operation and after this state, the circulation controlling means increases the circulating amount of hot water by the set increasing amount as a refrigerant pressure becomes pressure for increasing and controlling the circulating amount and repeats the circulating amount increasing control for waiting it for a set time.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、給湯路が上部に接
続された貯湯タンクと、前記貯湯タンク内に湯水が温度
成層を形成して貯湯されるように、貯湯タンクの底部か
ら取り出した湯水をヒートポンプ式加熱器にて加熱した
のち、その温水を前記貯湯タンクの上部に供給する形態
の貯湯運転状態で湯水を循環させる湯水循環手段と、前
記ヒートポンプ式加熱器による湯水の沸き上げ温度を貯
湯目標温度範囲の温度に維持すべく、前記湯水循環手段
による湯水の循環量を増減制御する循環制御手段と、前
記ヒートポンプ式加熱器における冷媒圧力が設定目標圧
力になるように冷媒圧縮機の回転速度を制御するヒート
ポンプ運転制御手段とが設けられた貯湯式の給湯熱源装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage tank having a hot water supply path connected to an upper portion thereof, and hot water taken out from the bottom of the hot water storage tank so that the hot water forms a temperature stratification and is stored in the hot water storage tank. Is heated by a heat pump heater, and then the hot water is supplied to the upper part of the hot water storage tank. The hot water circulation means circulates the hot water in a hot water storage operation state, and the boiling temperature of the hot water by the heat pump heater is stored. Circulation control means for increasing or decreasing the amount of hot water circulated by the hot water circulating means to maintain the temperature in the target temperature range; and a rotational speed of the refrigerant compressor such that the refrigerant pressure in the heat pump heater reaches a set target pressure. And a heat pump operation control means for controlling the temperature of the hot water supply.

【０００２】[0002]

【従来の技術】貯湯式の給湯熱源装置としては、従来、
例えば特開昭５９−２４１３７号公報に記載されている
ように、貯湯タンクの底部から取り出した湯水をヒート
ポンプ式加熱器にて貯湯目標温度範囲の沸き上げ温度に
加熱したのち、その温水を貯湯タンクの上部に供給する
ことにより、貯湯目標温度範囲の沸き上げ温度の湯水を
貯湯タンク内に温度成層を形成して貯湯できるようにし
たものがある。そして、上記従来の貯湯式の給湯熱源装
置においては、一般に、ヒートポンプ式加熱器による湯
水の沸き上げ温度を貯湯目標温度範囲の温度に維持すべ
く、湯水循環手段による湯水の循環量を増減制御する循
環制御手段と、ヒートポンプ式加熱器における冷媒圧力
が設定目標圧力になるように冷媒圧縮機の回転速度を制
御するヒートポンプ運転制御手段とが設けられ、ヒート
ポンプ運転制御手段は、冷媒圧力が設定目標圧力になる
ように冷媒圧縮機の回転速度を制御することにより、加
熱対象となる湯水を貯湯目標温度範囲の沸き上げ温度に
加熱するのに必要とする加熱力をヒートポンプ式加熱器
が出力する状態になるように調整することになる。ちな
みに、この回転速度制御は、検出した冷媒圧力と設定目
標圧力との偏差に基づいてフィードバック制御されるこ
とになり、その制御における時定数は充分大きく設定さ
れて、回転速度の増減変更は緩やかな速度で行われるこ
とになる。2. Description of the Related Art Conventionally, as a hot water supply heat source device of a hot water storage type,
For example, as described in JP-A-59-24137, hot water taken out from the bottom of a hot water storage tank is heated to a boiling temperature within a target hot water storage temperature range by a heat pump heater, and then the hot water is stored in the hot water storage tank. Is supplied to the upper portion of the hot water storage tank so that hot water having a boiling temperature in the target hot water storage temperature range can be stored in a hot water storage tank by forming a temperature stratification in the hot water storage tank. In the conventional hot water supply heat source device of the conventional hot water supply type, generally, the amount of hot water circulated by the hot water circulating means is controlled to increase or decrease in order to maintain the boiling temperature of the hot water by the heat pump heater at a temperature in the hot water storage target temperature range. Circulation control means and heat pump operation control means for controlling the rotation speed of the refrigerant compressor so that the refrigerant pressure in the heat pump heater reaches the set target pressure are provided, and the heat pump operation control means sets the refrigerant pressure to the set target pressure. By controlling the rotation speed of the refrigerant compressor such that the heating power required to heat the hot water to be heated to the boiling temperature in the hot water storage target temperature range is output from the heat pump heater. It will be adjusted to become. Incidentally, this rotation speed control is to be feedback-controlled based on the deviation between the detected refrigerant pressure and the set target pressure, the time constant in the control is set sufficiently large, and the increase / decrease change of the rotation speed is gradual. Will be done at speed.

【０００３】[0003]

【発明が解決しようとする課題】ところで、従来の貯湯
式の給湯熱源装置では、一方では、循環制御手段が、ヒ
ートポンプ式加熱器の運転状態に応じて、そのヒートポ
ンプ式加熱器による湯水の沸き上げ温度を貯湯目標温度
範囲の温度に維持すべく、湯水循環手段による湯水の循
環量を増減制御しており、他方では、ヒートポンプ運転
制御手段が、湯水を貯湯目標温度範囲の沸き上げ温度に
加熱するのに必要とする加熱力をヒートポンプ式加熱器
が出力できるように、冷媒圧縮機の回転速度を制御して
いる。この為、ヒートポンプ運転制御手段は、湯水を貯
湯目標温度範囲の沸き上げ温度に加熱するのに必要とす
る加熱力をヒートポンプ式加熱器が出力できておれば、
ヒートポンプ式加熱器に運転余力があっても、ヒートポ
ンプ式加熱器の運転余力を引き出すような制御は行わ
ず、また、循環制御手段も、湯水の沸き上げ温度を貯湯
目標温度範囲の温度に維持できておれば、湯水の循環量
を増大させるような制御を行わないので、ヒートポンプ
式加熱器の運転能力を充分活用して能率良く貯湯できな
い欠点がある。本発明は上記実情に鑑みてなされたもの
であって、ヒートポンプ式加熱器の運転能力を充分活用
して能率良く貯湯できるようにすることを目的とする。On the other hand, in a conventional hot water supply type hot water supply heat source device, on the other hand, the circulation control means raises hot water by the heat pump type heater according to the operation state of the heat pump type heater. In order to maintain the temperature in the hot water storage target temperature range, the amount of hot water circulation by the hot water circulation means is controlled to increase or decrease, while the heat pump operation control means heats the hot water to the boiling temperature in the hot water storage target temperature range. The rotation speed of the refrigerant compressor is controlled so that the heat pump heater can output the heating power required for the heating. For this reason, the heat pump operation control means, if the heat pump heater can output the heating power required to heat the hot water to the boiling temperature of the hot water storage target temperature range,
Even if the heat pump heater has the remaining operating capacity, control is not performed to extract the remaining operating capacity of the heat pump heater. In this case, since the control for increasing the circulation amount of the hot water is not performed, there is a disadvantage that the operation capacity of the heat pump type heater is sufficiently utilized and the hot water cannot be efficiently stored. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to efficiently utilize hot water of a heat pump heater to store hot water efficiently.

【０００４】[0004]

【課題を解決するための手段】請求項１記載の発明の特
徴構成は、給湯路が上部に接続された貯湯タンクと、前
記貯湯タンク内に湯水が温度成層を形成して貯湯される
ように、貯湯タンクの底部から取り出した湯水をヒート
ポンプ式加熱器にて加熱したのち、その温水を前記貯湯
タンクの上部に供給する形態の貯湯運転状態で湯水を循
環させる湯水循環手段と、前記ヒートポンプ式加熱器に
よる湯水の沸き上げ温度を貯湯目標温度範囲の温度に維
持すべく、前記湯水循環手段による湯水の循環量を増減
制御する循環制御手段と、前記ヒートポンプ式加熱器に
おける冷媒圧力が設定目標圧力になるように冷媒圧縮機
の回転速度を制御するヒートポンプ運転制御手段とが設
けられた貯湯式の給湯熱源装置であって、前記循環制御
手段が、前記沸き上げ温度が前記貯湯目標温度範囲の温
度であり、かつ、前記ヒートポンプ式加熱器に運転余力
が有るときには、前記湯水の循環量を設定量増大させて
設定時間待機する循環量増大制御を繰り返し実行するよ
うに構成されている点にある。〔作用〕循環制御手段は、沸き上げ温度が貯湯目標温度
範囲の温度であっても、ヒートポンプ式加熱器に運転余
力が有るときには、湯水の循環量を設定量増大させて設
定時間待機する循環量増大制御を繰り返し実行する。こ
のため、ヒートポンプ運転制御手段は、設定量増大させ
た循環量に対応して、ヒートポンプ式加熱器における冷
媒圧力が設定目標圧力になるように冷媒圧縮機の回転速
度を制御することになるので、循環制御手段は、湯水の
循環量を設定量増大させてから設定時間待機して、その
設定量増大させた循環量の湯水を貯湯目標温度範囲の沸
き上げ温度に加熱するのに必要とする加熱力をヒートポ
ンプ式加熱器が出力できるかどうかを見る状態で、充分
な加熱力をヒートポンプ式加熱器が出力できない状態に
なるまで、つまり、ヒートポンプ式加熱器の運転余力が
無くなって貯湯目標温度範囲の沸き上げ温度を維持でき
なくなるまで、循環量を設定量ずつ徐々に増大させるこ
とができる。〔効果〕ヒートポンプ式加熱器に運転余力があれば、そ
の運転余力を無駄にすることなく、湯水の循環量を増大
させて貯湯できるので、ヒートポンプ式加熱器の運転能
力を充分活用して能率良く貯湯できる。According to a first aspect of the present invention, there is provided a hot water storage tank having a hot water supply path connected to an upper portion thereof, and hot water is formed in the hot water storage tank by forming a temperature stratification. Hot water circulating means for circulating hot water in a hot water storage operation state in which hot water taken out from the bottom of the hot water storage tank is heated by a heat pump heater, and then the hot water is supplied to an upper portion of the hot water storage tank; Circulation control means for increasing and decreasing the amount of hot water circulated by the hot water circulation means so as to maintain the boiling temperature of the hot water by the heater at a temperature in the hot water storage target temperature range, and the refrigerant pressure in the heat pump heater becomes the set target pressure. And a heat pump operation control means for controlling the rotation speed of the refrigerant compressor so as to provide a hot water supply heat source device, wherein the circulation control means comprises: When the cooling temperature is within the hot water storage target temperature range and the heat pump heater has an operating margin, the circulation amount increase control for increasing the circulation amount of the hot water and setting a standby time for a set time is repeatedly executed. The point is that it is configured as follows. [Operation] The circulation control means increases the circulation amount of hot water and sets a circulation amount for standby for a set time when the heat pump type heater has enough operating capacity even if the boiling temperature is within the target temperature range of the hot water storage. The increase control is repeatedly executed. For this reason, the heat pump operation control means controls the rotation speed of the refrigerant compressor so that the refrigerant pressure in the heat pump heater becomes the set target pressure in accordance with the circulation amount increased by the set amount. The circulation control means waits for a set time after increasing the circulation amount of the hot water, and waits for a set time to heat the heating water required to heat the set amount of the circulation water to the boiling temperature in the hot water storage target temperature range. While checking whether the heat pump heater can output power, until the heat pump heater cannot output sufficient heating power, that is, the operating capacity of the heat pump heater is lost and the hot water storage target temperature range Until the boiling temperature cannot be maintained, the circulation amount can be gradually increased by a set amount. [Effect] If the heat pump type heater has a surplus operating capacity, the amount of hot water circulated can be increased and hot water can be stored without wasting the surplus operating capacity. Hot water can be stored.

【０００５】請求項２記載の発明の特徴構成は、前記循
環制御手段が、前記循環量増大制御を実行したあと、前
記沸き上げ温度が前記貯湯目標温度範囲の温度よりも低
く、かつ、前記ヒートポンプ式加熱器の運転余力が無い
ときは、前記沸き上げ温度が前記貯湯目標温度範囲の温
度になるように、前記湯水の循環量を設定量減少させて
設定時間待機する循環量減少制御を繰り返し実行するよ
うに構成されている点にある。〔作用〕循環制御手段は、循環量増大制御を実行したあ
と、前記沸き上げ温度が貯湯目標温度範囲の温度よりも
低く、かつ、ヒートポンプ式加熱器の運転余力が無いと
きは、つまり、ヒートポンプ式加熱器の運転余力が無く
なって貯湯目標温度範囲の沸き上げ温度を維持できなく
なると、沸き上げ温度が貯湯目標温度範囲の温度になる
ように、湯水の循環量を設定量減少させて設定時間待機
する循環量減少制御を繰り返し実行する。このため、ヒ
ートポンプ運転制御手段は、設定量減少させた循環量に
対応して、ヒートポンプ式加熱器における冷媒圧力が設
定目標圧力になるように冷媒圧縮機の回転速度を制御す
ることになるので、循環制御手段は、湯水の循環量を設
定量減少させてから設定時間待機して、その設定量減少
させた循環量の湯水を貯湯目標温度範囲の沸き上げ温度
に加熱するのに必要とする加熱力をヒートポンプ式加熱
器が出力できるかどうかを見る状態で、充分な加熱力を
ヒートポンプ式加熱器が出力できる状態になるまで、つ
まり、貯湯目標温度範囲の沸き上げ温度を維持できるよ
うになるまで、循環量を設定量ずつ徐々に減少させるこ
とができる。〔効果〕湯水の循環量を設定量ずつ徐々に増大させて、
ヒートポンプ式加熱器の運転余力を引き出しながら、ヒ
ートポンプ式加熱器の運転余力がなくなると、貯湯目標
温度範囲の沸き上げ温度を維持できるようになるまで、
湯水の循環量を減少させて貯湯できるので、ヒートポン
プ式加熱器の運転能力を最大限に引き出し易い。According to a second feature of the present invention, after the circulation control means executes the circulation amount increasing control, the boiling temperature is lower than the temperature in the hot water storage target temperature range, and the heat pump When there is no remaining operating capacity of the hot water heater, the circulation amount reduction control of reducing the circulation amount of the hot water and setting a standby time for a set time is repeatedly performed so that the boiling temperature becomes the temperature in the hot water storage target temperature range. The point is that it is configured to. [Operation] The circulation control means, after executing the circulation amount increase control, when the boiling temperature is lower than the temperature of the hot water storage target temperature range, and when there is no remaining operating capacity of the heat pump type heater, that is, the heat pump type If the heating capacity of the heater runs out and the boiling temperature in the hot water storage target temperature range cannot be maintained, the circulation amount of hot water is reduced by the set amount so that the boiling temperature becomes the temperature in the hot water storage target temperature range, and the system waits for the set time. Is repeatedly executed. For this reason, the heat pump operation control means controls the rotation speed of the refrigerant compressor so that the refrigerant pressure in the heat pump heater becomes the set target pressure in accordance with the circulating amount reduced by the set amount. The circulation control means waits for a set time after reducing the circulation amount of the hot water, and waits for a set time, and heats the heating water required to heat the reduced circulation amount of the hot water to the boiling temperature in the hot water storage target temperature range. While checking whether the heat pump heater can output power, until the heat pump heater can output sufficient heating power, that is, until the boiling temperature in the hot water storage target temperature range can be maintained , The amount of circulation can be gradually reduced by the set amount. [Effect] By gradually increasing the circulation amount of hot and cold water by the set amount,
When the operating capacity of the heat pump heater runs out while the operating capacity of the heat pump heater is being drawn out, until the boiling temperature in the hot water storage target temperature range can be maintained.
Since the hot water can be stored with a reduced amount of hot water circulation, it is easy to maximize the operating capacity of the heat pump heater.

【０００６】請求項３記載の発明の特徴構成は、前記湯
水循環手段が、前記貯湯タンク内に湯水が温度成層を形
成して貯湯されるように、貯湯タンクの底部から取り出
した湯水をヒートポンプ式加熱器と補助加熱器とを併用
して、又は、前記ヒートポンプ式加熱器に代えて前記補
助加熱器にて加熱したのち、その温水を前記貯湯タンク
の上部に供給する形態で湯水を循環させる補助加熱貯湯
運転状態に切り換え自在に構成され、前記循環制御手段
が、前記貯湯運転状態において、前記沸き上げ温度が前
記貯湯目標温度範囲の温度よりも低く、前記ヒートポン
プ式加熱器に運転余力が無く、湯水の循環量が、前記貯
湯運転状態で循環させる湯水の最低流量として設定した
設定最低流量よりも少ないときには、前記補助加熱貯湯
運転状態に切り換えて前記湯水循環手段の運転を制御す
るように構成されている点にある。〔作用〕循環制御手段は、貯湯運転状態において、沸き
上げ温度が貯湯目標温度範囲の温度よりも低く、ヒート
ポンプ式加熱器に運転余力が無く、湯水の循環量が、貯
湯運転状態で循環させる湯水の最低流量として設定した
設定最低流量よりも少ないときには、湯水循環手段を補
助加熱貯湯運転状態に切り換えてその湯水循環手段の運
転を制御する。つまり、湯水の循環量が設定最低流量よ
りも少なくて、循環量を減少させて沸き上げ温度を貯湯
目標温度範囲の温度に維持することができず、ヒートポ
ンプ式加熱器の運転余力も無いときは、ヒートポンプ式
加熱器と補助加熱器とを併用して、又は、ヒートポンプ
式加熱器に代えて補助加熱器にて加熱した湯水を貯湯タ
ンクの上部に供給して貯湯できる。〔効果〕ヒートポンプ式加熱器による加熱では沸き上げ
温度を貯湯目標温度範囲の温度に維持することができな
いときでも、貯湯目標温度範囲の沸き上げ温度の湯水を
貯湯することができる。A third aspect of the present invention is characterized in that the hot-water circulating means heat-pumps water taken out from the bottom of the hot-water storage tank so that the hot-water forms a temperature stratification in the hot-water storage tank and is stored. After using the heater and the auxiliary heater together or heating the auxiliary heater in place of the heat pump heater, the hot water is supplied to the upper part of the hot water storage tank. In the hot water storage operation state, the circulation control means is configured to be freely switchable to a heating hot water storage operation state, the boiling temperature is lower than the temperature in the hot water storage target temperature range, and the heat pump heater has no remaining operating capacity, When the circulation amount of the hot water is smaller than the set minimum flow rate set as the minimum flow rate of the hot water circulated in the hot water storage operation state, the operation mode is switched to the auxiliary heating hot water storage operation state. In that it is configured to control the operation of the hot water circulating means Te. [Operation] The circulation control means is configured such that, in the hot water storage operation state, the boiling temperature is lower than the temperature in the hot water storage target temperature range, the heat pump type heater has no operating reserve, and the circulation amount of the hot water is circulated in the hot water storage operation state. When the flow rate is smaller than the set minimum flow rate set as the minimum flow rate, the hot water circulation means is switched to the auxiliary heating hot water storage operation state to control the operation of the hot water circulation means. In other words, when the circulation amount of hot water is less than the set minimum flow rate, the circulation amount is reduced, the boiling temperature cannot be maintained at the temperature of the hot water storage target temperature range, and there is no operating capacity of the heat pump heater. Hot water heated by an auxiliary heater can be supplied to the upper portion of a hot water storage tank by using a heat pump heater and an auxiliary heater in combination or in place of the heat pump heater. [Effect] Even when the boiling temperature cannot be maintained in the hot water storage target temperature range by heating by the heat pump heater, hot water having the boiling temperature in the hot water storage target temperature range can be stored.

【０００７】[0007]

【発明の実施の形態】本発明にかかる貯湯式の給湯熱源
装置の実施の形態をエンジンヒートポンプ式冷暖房給湯
システムに適用した例を図面に基づいて説明する。〔第１実施形態〕このエンジンヒートポンプ式冷暖房給
湯システムは、図１，図２に示すように、貯湯タンク１
内に温度成層を形成して貯湯された湯水を給湯したり、
貯湯タンク内１の湯水を加熱して外部放熱部２にて放熱
したりする貯湯ユニットＡと、室内の冷暖房をするエン
ジンヒートポンプ式冷暖房装置Ｂとから構成されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a hot water supply heat source device of a storage type according to the present invention is applied to an engine heat pump type cooling and heating hot water supply system will be described with reference to the drawings. [First Embodiment] As shown in FIGS. 1 and 2, this engine heat pump type cooling and heating hot water supply system
The hot water stored by forming a temperature stratification in the hot water,
A hot water storage unit A heats hot water in a hot water storage tank 1 and radiates heat in an external heat radiating unit 2, and an engine heat pump cooling and heating device B for cooling and heating the room.

【０００８】前記貯湯ユニットＡは、この貯湯ユニット
Ａの運転を制御する貯湯ユニット制御部Ｃ、貯湯タンク
１、貯湯タンク１内の湯水を循環させる循環路３を備え
た湯水循環手段Ｅ、循環路３を通流する湯水を加熱する
加熱部４、循環路３を通流する湯水と熱交換して放熱す
る外部放熱部２などから構成され、循環ポンプＰ１の作
動で貯湯タンク１内の湯水を循環路３にて循環させなが
ら、加熱部４にて加熱したり、外部放熱部２にて放熱し
たりするようにしている。The hot water storage unit A includes a hot water storage unit control section C for controlling the operation of the hot water storage unit A, a hot water storage tank 1, a hot water circulation means E having a circulation path 3 for circulating hot water in the hot water storage tank 1, and a circulation path. The heating unit 4 heats the hot and cold water flowing through the hot water 3, and the external heat radiating unit 2 radiates heat by exchanging heat with the hot and cold water flowing through the circulation path 3. While being circulated in the circulation path 3, heating is performed by the heating unit 4 and heat is radiated by the external heat radiating unit 2.

【０００９】前記貯湯タンク１には、その底部から貯湯
タンク１に水道水圧を用いて給水する給水路５が接続さ
れ、その上部から風呂場や台所などに給湯するための給
湯路６が接続され、風呂場や台所などで使用された量だ
けの水を給水路５から貯湯タンク１に給水するように構
成されている。また、貯湯タンク１の内側には、貯湯タ
ンク１内の湯水の温度を検出する４個の温度センサとし
ての貯湯温度サーミスタＳ１，Ｓ２，Ｓ３，Ｓ４が上下
に分散配置して設けられている。The hot water storage tank 1 is connected from the bottom to a water supply path 5 for supplying water to the hot water storage tank 1 using tap water pressure, and from the upper part thereof to a hot water supply path 6 for supplying hot water to a bathroom or a kitchen. The water is supplied from the water supply channel 5 to the hot water storage tank 1 only in an amount used in a bathroom or a kitchen. Further, inside the hot water storage tank 1, hot water storage temperature thermistors S1, S2, S3, and S4 as four temperature sensors for detecting the temperature of hot water in the hot water storage tank 1 are provided in a vertically dispersed manner.

【００１０】前記給湯路６には、給水路５から分岐され
た混合用給水路７が接続され、その接続箇所に給湯路６
からの湯水と混合用給水路７からの水との混合比を調整
自在なミキシングバルブ８が設けられている。前記給水
路５と混合用給水路７との分岐箇所には、給水温度を検
出する給水サーミスタ９が設けられ、給水路５および混
合用給水路７の夫々には、逆止弁１０が設けられてい
る。ちなみに、給湯路６には、オーバーフロー路１１が
接続され、そのオーバーフロー路１１にエアー抜き弁１
２が設けられている。A mixing water supply channel 7 branched from the water supply channel 5 is connected to the hot water supply channel 6.
A mixing valve 8 is provided which is capable of adjusting the mixing ratio between hot water and water from the mixing water supply passage 7. A water supply thermistor 9 for detecting water supply temperature is provided at a branch point between the water supply path 5 and the mixing water supply path 7, and a check valve 10 is provided in each of the water supply path 5 and the mixing water supply path 7. ing. Incidentally, an overflow path 11 is connected to the hot water supply path 6, and the air release valve 1 is connected to the overflow path 11.
2 are provided.

【００１１】また、給湯路６におけるミキシングバルブ
８よりも上流側には、貯湯タンク１の上部から給湯路６
に給湯された湯水の温度を検出する貯湯出口サーミスタ
１３が設けられ、給湯路６におけるミキシングバルブ８
よりも下流側には、ミキシングバルブ８にて混合された
湯水の温度を検出するミキシングサーミスタ１４、給湯
路６の湯水の流量を調整する給湯用水比例バルブ１５が
設けられている。On the upstream side of the mixing valve 8 in the hot water supply path 6, the hot water supply path 6
A hot water outlet thermistor 13 for detecting the temperature of hot water supplied to the hot water supply passage 6 is provided.
Further downstream, a mixing thermistor 14 for detecting the temperature of the hot and cold water mixed by the mixing valve 8 and a hot water supply proportional valve 15 for adjusting the flow rate of hot and cold water in the hot water supply passage 6 are provided.

【００１２】前記給湯用水比例バルブ１５よりも下流側
の給湯路６が、台所や洗面所などの給湯栓に給湯する一
般給湯路１６と、浴槽に湯水を供給するための湯張り路
１７とに分岐され、湯張り路１７が浴槽からの風呂戻り
路１８に接続され、風呂戻り路１８および風呂往き路１
９の両路を通して浴槽に湯水を供給するようにしてい
る。前記一般給湯路１６には、一般給湯路１６を通流す
る湯水の流量を検出する給湯流量センサ２０が設けら
れ、湯張り路１７には、湯張り路１７を通流する湯水の
流量を検出する湯張り流量センサ２１、湯張り電磁弁２
２、バキュームブレーカ２３、湯張り逆止弁２４が上流
側から順に設けられている。A hot water supply path 6 downstream of the hot water supply proportional valve 15 has a general hot water supply path 16 for supplying hot water to a hot water tap in a kitchen or a washroom, and a hot water supply path 17 for supplying hot water to a bathtub. It is branched, and the hot water path 17 is connected to the bath return path 18 from the bathtub, and the bath return path 18 and the bath going path 1
The hot and cold water is supplied to the bathtub through both paths 9. The general hot water supply path 16 is provided with a hot water supply flow rate sensor 20 for detecting a flow rate of hot water flowing through the general hot water supply path 16, and the hot water path 17 is configured to detect a flow rate of hot water flowing through the hot water supply path 17. Filling water flow sensor 21, filling water electromagnetic valve 2
2. A vacuum breaker 23 and a hot water check valve 24 are provided in this order from the upstream side.

【００１３】前記循環路３と貯湯タンク１とが、循環路
３を通流する湯水を貯湯タンク１内に戻す、または、貯
湯タンク１内の湯水を循環路３に取り出すために、貯湯
タンク１の上部１箇所と底部２箇所の合計３箇所で連通
接続されている。具体的に説明すると、貯湯タンク１の
上部には、循環路３と貯湯タンク１とを接続する上部接
続路２５が給湯路６の上流側を介して連通接続され、貯
湯タンク１の底部には、循環路３を通流する湯水を給水
路５の下流側を介して貯湯タンク１内の底部に戻す戻し
路２６と、貯湯タンク１内の底部の湯水を循環路３に取
り出す取り出し路２７とが連通接続されている。The circulation path 3 and the hot water storage tank 1 are used to return hot water flowing through the circulation path 3 to the hot water storage tank 1 or to take out hot water from the hot water storage tank 1 to the circulation path 3. Are connected at a total of three locations, one at the top and two at the bottom. More specifically, an upper connection path 25 that connects the circulation path 3 and the hot water storage tank 1 is connected to the upper part of the hot water storage tank 1 via the upstream side of the hot water supply path 6, and is connected to the bottom of the hot water storage tank 1. A return path 26 for returning the hot water flowing through the circulation path 3 to the bottom in the hot water storage tank 1 via the downstream side of the water supply path 5; and a takeout path 27 for taking out the hot water from the bottom in the hot water storage tank 1 to the circulation path 3; Are connected.

【００１４】そして、上部接続路２５には、電磁式の上
部開閉弁２８が設けられ、戻し路２６には、戻し開閉弁
２９が設けられ、上部開閉弁２８を開弁させることによ
って、循環路３を通流する湯水を貯湯タンク１内の上部
に供給したり、貯湯タンク１内の上部の湯水を循環路３
に取り出したりするようにし、戻し開閉弁２９を開弁さ
せることによって、循環路３を通流する湯水を貯湯タン
ク１内の底部に戻すことができるようにしている。ちな
みに、取り出し路２７には、貯湯タンク１内の湯水を排
水するための排水路３０が接続され、その排水路３０の
途中部には、安全弁３１と手動バルブ３２とが並列に接
続されている。The upper connection passage 25 is provided with an electromagnetic upper opening / closing valve 28, and the return passage 26 is provided with a return opening / closing valve 29. By opening the upper opening / closing valve 28, the circulation passage is opened. The hot and cold water flowing through the hot water storage tank 1 is supplied to the upper part of the hot water storage tank 1,
The hot water flowing through the circulation path 3 can be returned to the bottom in the hot water storage tank 1 by opening the return on-off valve 29. Incidentally, a drainage channel 30 for draining hot water from the hot water storage tank 1 is connected to the takeout channel 27, and a safety valve 31 and a manual valve 32 are connected in parallel at an intermediate portion of the drainage channel 30. .

【００１５】前記加熱部４は、エンジンヒートポンプ式
冷暖房装置Ｂによる冷媒を供給して湯水を加熱するヒー
トポンプ式加熱器３３と、エンジンヒートポンプ式冷暖
房装置Ｂのエンジン排熱を回収した冷却水を供給して湯
水を加熱するエンジン排熱利用式加熱器３４と、バーナ
３６の燃焼により湯水を加熱する補助加熱器３５とを設
けて構成されている。そして、循環路３の湯水の循環方
向において上流側から順に、ヒートポンプ式加熱器３
３、エンジン排熱利用式加熱器３４、補助加熱器３５が
設けられている。The heating section 4 supplies a heat pump type heater 33 for supplying a refrigerant from the engine heat pump type cooling / heating device B to heat hot water, and a cooling water for recovering the engine exhaust heat of the engine heat pump type cooling / heating device B. The system is provided with an engine exhaust heat heater 34 for heating hot and cold water, and an auxiliary heater 35 for heating hot and cold water by burning a burner 36. Then, the heat pump heater 3 is sequentially arranged from the upstream side in the circulation direction of the hot and cold water in the circulation path 3.
3. An engine exhaust heat utilization type heater 34 and an auxiliary heater 35 are provided.

【００１６】前記補助加熱器３５は、ガス燃焼式のバー
ナ３６に燃焼用空気を供給するファン３７などが設けら
れ、バーナ３６の燃焼により循環路３を通流する湯水を
加熱するように構成されている。前記バーナ３６に燃料
ガスを供給する燃料供給路３８には、上流側から順にガ
スセフティ弁３９、ガス比例弁４０、ガスメイン弁４１
が設けられている。The auxiliary heater 35 is provided with a fan 37 for supplying combustion air to a gas-fired burner 36, and is configured to heat hot and cold water flowing through the circulation path 3 by combustion of the burner 36. ing. A gas supply valve 38, a gas proportional valve 40, and a gas main valve 41 are provided in order from an upstream side in a fuel supply path 38 for supplying a fuel gas to the burner 36.
Is provided.

【００１７】前記外部放熱部２は、循環路３を通流する
湯水と暖房用の熱媒としての温水とを熱交換する暖房用
熱交換部４２と、循環路３を通流する湯水と浴槽内の湯
水とを熱交換して追焚きする風呂用熱交換部４３とを設
けて構成されている。そして、循環路３が、暖房用熱交
換部４２を備えた暖房用循環路３ａと、風呂用熱交換部
４３を備えた風呂用循環路３ｂとに分岐され、暖房用熱
交換部４２と風呂用熱交換部４３とが並列に接続されて
いる。また、暖房用循環路３ａには、暖房用熱交換部４
２よりも湯水の循環方向の上流側に電磁式の暖房用開閉
弁４４が設けられ、風呂用循環路３ｂには、風呂用熱交
換部４３よりも湯水の循環方向の上流側に電磁式の風呂
用開閉弁４５が設けられている。The external heat dissipating section 2 includes a heating heat exchange section 42 for exchanging heat between hot water flowing through the circulation path 3 and hot water as a heating medium for heating, a hot water section flowing through the circulation path 3 and a bathtub. A bath heat exchange unit 43 for exchanging heat with hot water in the bath and reheating is provided. The circulation path 3 is branched into a heating circulation path 3a having a heating heat exchange section 42 and a bath circulation path 3b having a bath heat exchange section 43, and the heating heat exchange section 42 and the bath. The heat exchange unit 43 is connected in parallel. Further, the heating heat exchange section 4 is provided in the heating circulation path 3a.
An electromagnetic on-off valve 44 for heating is provided on the upstream side in the direction of circulation of hot and cold water more than the second, and in the bath circulation path 3b, an electromagnetic on-off valve 44 is provided on the upstream side in the circulation direction of hot and cold water from the heat exchange unit 43 for bath. A bath on-off valve 45 is provided.

【００１８】前記暖房用熱交換部４２には、暖房ポンプ
Ｐ２を作動させることにより、暖房戻り路４６および暖
房往き路４７を通して循環する暖房用熱媒を、循環路３
を通流する湯水にて加熱するように構成されている。そ
して、暖房戻り路４６には、上流側から順に、暖房戻り
路４６の暖房用熱媒の温度を検出する暖房戻りサーミス
タ４８、補給水タンク４９、暖房ポンプＰ２が設けら
れ、暖房往き路４７には、暖房往き路４７の暖房用熱媒
の温度を検出する暖房往きサーミスタ５０が設けられて
いる。By operating the heating pump P 2, the heating heat medium circulating through the heating return path 46 and the heating outgoing path 47 is supplied to the heating heat exchange section 42 through the circulation path 3.
It is configured to heat with hot water flowing through. The heating return path 46 is provided with a heating return thermistor 48 for detecting the temperature of the heating heat medium in the heating return path 46, a makeup water tank 49, and a heating pump P2 in order from the upstream side. Is provided with a heating outgoing thermistor 50 for detecting the temperature of the heating heat medium in the heating outgoing passage 47.

【００１９】前記補給水タンク４９には、水位の上限を
検出する上限センサ５１と下限を検出する下限センサ５
２とが設けられ、補給水タンク４９に給水するためのタ
ンク給水路５３が接続され、そのタンク給水路５３に
は、補給水電磁弁５４が設けられている。また、暖房戻
り路４６の暖房用熱媒を暖房用熱交換部４２を迂回して
暖房往き路４７に供給する暖房バイパス路５５が設けら
れている。The makeup water tank 49 has an upper limit sensor 51 for detecting the upper limit of the water level and a lower limit sensor 5 for detecting the lower limit.
2, a tank water supply passage 53 for supplying water to the makeup water tank 49 is connected, and the makeup water supply passage 53 is provided with a makeup water solenoid valve 54. In addition, a heating bypass path 55 that supplies the heating heat medium in the heating return path 46 to the heating outflow path 47 bypassing the heating heat exchange unit 42 is provided.

【００２０】前記風呂用熱交換部４３は、風呂ポンプＰ
３を作動させることにより、風呂戻り路１８および風呂
往き路１９を通して循環する浴槽内の湯水を循環路３を
通流する湯水にて加熱するように構成されている。そし
て、風呂戻り路１８には、上流側から順に、浴槽内の湯
水の水位を検出する水位センサ５６、風呂戻り路１８の
湯水の温度を検出する風呂戻りサーミスタ５７、二方弁
５８、風呂ポンプＰ３、風呂水流スイッチ５９が設けら
れている。The bath heat exchange section 43 includes a bath pump P
By operating the bath 3, the hot water in the bath tub circulating through the bath return path 18 and the bath going path 19 is heated by the hot water flowing through the circulation path 3. In the bath return path 18, a water level sensor 56 for detecting the level of hot water in the bathtub, a bath return thermistor 57 for detecting the temperature of hot water in the bath return path 18, a two-way valve 58, and a bath pump are arranged in this order from the upstream side. P3, a bath water flow switch 59 is provided.

【００２１】前記循環路３における戻り路２６との接続
箇所と取り出し路２７との接続箇所との間には、外部放
熱部２を通過した湯水のヒートポンプ式加熱器３３への
通流を断続する電磁式のヒートポンプ用開閉弁６０が設
けられ、エンジン排熱利用式加熱器３４と補助加熱器３
５との間の部分に、補助加熱器３５に通流する湯水の温
度を検出する入り温度サーミスタ６１、循環路３を通流
する湯水の循環量Ｑを検出する循環量センサ６２、循環
ポンプＰ１、補助加熱器３５への湯水の通流を断続する
電磁式の補助用断続開閉弁６３が設けられている。Between the connection point of the circulation path 3 and the connection point with the return path 26 and the connection point of the circulation path 3, the flow of hot and cold water passing through the external heat radiation part 2 to the heat pump heater 33 is interrupted. An on-off valve 60 for an electromagnetic heat pump is provided, and the heater 34 utilizing the exhaust heat of the engine and the auxiliary heater 3 are provided.
5, a temperature thermistor 61 for detecting the temperature of the hot water flowing through the auxiliary heater 35, a circulation amount sensor 62 for detecting a circulation amount Q of the hot water flowing through the circulation path 3, and a circulation pump P1. An electromagnetic auxiliary on-off valve 63 for interrupting the flow of hot and cold water to the auxiliary heater 35 is provided.

【００２２】前記循環路３における補助用断続開閉弁６
３と補助加熱器３５との間には、補助加熱器３５に通流
する湯水の循環量Ｑを検出する水量センサ６４が設けら
れ、循環路３における補助加熱器３５と上部接続路２５
との接続箇所との間には、循環路３を通流する湯水の循
環量Ｑを調整する水比例バルブ６５、加熱部４にて加熱
された後の循環路３の湯水の沸き上げ温度Ｔａを検出す
る貯湯サーミスタ６６が設けられている。The auxiliary intermittent on-off valve 6 in the circulation path 3
Between the auxiliary heater 35 and the auxiliary heater 35, a water amount sensor 64 for detecting a circulation amount Q of hot water flowing through the auxiliary heater 35 is provided.
A water proportional valve 65 for adjusting the circulation amount Q of the hot water flowing through the circulation path 3, the boiling temperature Ta of the hot water in the circulation path 3 after being heated by the heating unit 4. Is provided.

【００２３】また、循環路３には、外部放熱部２を通過
した湯水をヒートポンプ式加熱器３３を迂回してエンジ
ン排熱利用式加熱器３４に流入させるためのヒートポン
プ用バイパス路６７と、エンジン排熱利用式加熱器３４
を通過した湯水を補助加熱器３５を迂回して循環させる
ための補助用バイパス路６８とが接続され、ヒートポン
プ用バイパス路６７には、電磁式のヒートポンプバイパ
ス開閉弁６９が設けられ、補助用バイパス路６８には、
電磁式の補助バイパス開閉弁７０が設けられている。The circulation path 3 also includes a heat pump bypass path 67 for allowing the hot and cold water that has passed through the external heat radiating section 2 to bypass the heat pump type heater 33 and flow into the engine exhaust heat utilization type heater 34. Waste heat heater 34
Is connected to an auxiliary bypass 68 for circulating the hot and cold water passing through the auxiliary heater 35, and the heat pump bypass 67 is provided with an electromagnetic heat pump bypass opening / closing valve 69. On road 68,
An electromagnetic auxiliary bypass on-off valve 70 is provided.

【００２４】そして、湯水循環手段Ｅが、循環路３、上
部接続路２５、戻し路２６、取り出し路２７、循環ポン
プＰ１、および、上部開閉弁２８、暖房用開閉弁４４、
風呂用開閉弁４５、戻し開閉弁２９、ヒートポンプ用開
閉弁６０、ヒートポンプバイパス開閉弁６９、補助用断
続開閉弁６３、補助バイパス開閉弁７０などにより構成
され、上部開閉弁２８、暖房用開閉弁４４、風呂用開閉
弁４５、戻し開閉弁２９、ヒートポンプ用開閉弁６０、
ヒートポンプバイパス開閉弁６９、補助用断続開閉弁６
３、補助バイパス開閉弁７０の開閉操作により、貯湯タ
ンク１の底部から取り出した湯水を加熱部４にて加熱し
たのち、その温水を貯湯タンク１の底部に戻す形態の貯
湯初期運転状態で湯水を循環させる貯湯初期運転と、貯
湯タンク１内に湯水が温度成層を形成して貯湯されるよ
うに、貯湯タンク１の底部から取り出した湯水を加熱部
４にて加熱したのち、その温水を貯湯タンク１の上部に
供給する形態の貯湯運転状態で湯水を循環させる貯湯運
転と、加熱部４にて加熱した湯水を外部放熱部２に供給
し、かつ、外部放熱部２を通過した湯水の全量を貯湯タ
ンク１を迂回して加熱部４に直接戻す形態の放熱運転状
態で湯水を循環させる放熱運転とに切り換え自在に構成
されている。The hot and cold water circulation means E includes a circulation path 3, an upper connection path 25, a return path 26, an extraction path 27, a circulation pump P1, an upper opening / closing valve 28, a heating opening / closing valve 44,
It comprises a bath on-off valve 45, a return on-off valve 29, a heat pump on-off valve 60, a heat pump bypass on-off valve 69, an auxiliary intermittent on-off valve 63, an auxiliary bypass on-off valve 70, etc., and an upper on-off valve 28, a heating on-off valve 44. Bath on-off valve 45, return on-off valve 29, heat pump on-off valve 60,
Heat pump bypass on-off valve 69, auxiliary intermittent on-off valve 6
3. By opening and closing the auxiliary bypass on-off valve 70, the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heating unit 4, and then the hot water is returned to the bottom of the hot water storage tank 1 in the hot water storage initial operation state. The hot water is taken out from the bottom of the hot water storage tank 1 by the heating unit 4 so that the hot water is initially circulated and the hot water is formed in the hot water storage tank 1 so that the hot water forms a temperature stratification and is stored. A hot water storage operation in which hot water is circulated in a hot water storage operation state in which the hot water is supplied to an upper portion of the hot water supply unit 1; the hot water heated by the heating unit 4 is supplied to the external heat radiating unit 2; It is configured to be freely switchable to a heat radiation operation in which hot water is circulated in a heat radiation operation state in which the hot water storage tank 1 is bypassed and returned directly to the heating unit 4.

【００２５】また、循環調整手段Ｆが、給水サーミスタ
９，入り温度サーミスタ６１，循環量センサ６２，水比
例バルブ６５、貯湯サーミスタ６６，貯湯温度サーミス
タＳ１，Ｓ２，Ｓ３，Ｓ４などにより構成され、給湯操
作手段Ｇが、貯湯出口サーミスタ１３、ミキシングバル
ブ８、給湯用水比例バルブ１５、給湯流量センサ２０、
湯張り流量センサ２１、湯張り電磁弁２２などにより構
成され、風呂操作手段Ｈが、水位センサ５６、風呂戻り
サーミスタ５７、二方弁５８、風呂ポンプＰ３、風呂水
流スイッチ５９などで構成され、暖房操作手段Ｊが、暖
房戻りサーミスタ４８、暖房ポンプＰ２、暖房往きサー
ミスタ５０などで構成されている。The circulation adjusting means F comprises a water supply thermistor 9, an incoming temperature thermistor 61, a circulation amount sensor 62, a water proportional valve 65, a hot water storage thermistor 66, a hot water storage temperature thermistor S1, S2, S3, S4 and the like. The operating means G includes a hot water storage outlet thermistor 13, a mixing valve 8, a hot water supply proportional valve 15, a hot water supply flow sensor 20,
The bath operation means H is composed of a water filling sensor 21, a water filling electromagnetic valve 22, and the like. The operating means J includes a heating return thermistor 48, a heating pump P2, a heating going thermistor 50, and the like.

【００２６】前記貯湯ユニット制御部Ｃは、上部開閉弁
２８、暖房用開閉弁４４、風呂用開閉弁４５、戻し開閉
弁２９、ヒートポンプ用開閉弁６０、ヒートポンプバイ
パス開閉弁６９、補助用断続開閉弁６３、補助バイパス
開閉弁７０の夫々を開閉制御することにより、貯湯タン
ク１の底部から取り出した湯水を加熱部４にて加熱した
のち、その温水を貯湯タンク１の底部に戻したり、貯湯
タンク１の底部から取り出した湯水を加熱部４にて加熱
したのち、その温水を貯湯タンク１の上部に戻したり、
循環路３を加熱部４と外部放熱部２とに亘って循環させ
たりするように構成されている。The hot water storage unit controller C includes an upper opening / closing valve 28, a heating opening / closing valve 44, a bath opening / closing valve 45, a return opening / closing valve 29, a heat pump opening / closing valve 60, a heat pump bypass opening / closing valve 69, an auxiliary intermittent opening / closing valve. 63, by controlling the opening and closing of each of the auxiliary bypass on-off valves 70, the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heating unit 4, and then the hot water is returned to the bottom of the hot water storage tank 1 or the hot water storage tank 1 After the hot water taken out from the bottom of the hot water is heated by the heating unit 4, the hot water is returned to the top of the hot water storage tank 1,
The circulation path 3 is configured to circulate over the heating section 4 and the external heat radiating section 2.

【００２７】前記エンジンヒートポンプ式冷暖房装置Ｂ
は、複数の室内機７１と室外機７２とを備えて、複数の
空調対象空間を空調することができるように構成され、
室内機７１と室外機７２と貯湯ユニットＡにおけるヒー
トポンプ式加熱器３３とが冷媒配管７３で接続され、エ
ンジンヒートポンプ式冷暖房装置Ｂにおける冷媒をヒー
トポンプ式加熱器３３に供給できるように構成されてい
る。前記複数の室内機７１の夫々には、室内熱交換器７
５、その室内熱交換器７５で温調した空気を空調対象空
間へ送出する室内空調用送風機７６などが備えられてい
る。[0027] The engine heat pump type cooling and heating apparatus B
Comprises a plurality of indoor units 71 and an outdoor unit 72, and is configured to be able to air-condition a plurality of air-conditioned spaces,
The indoor unit 71, the outdoor unit 72, and the heat pump type heater 33 in the hot water storage unit A are connected by a refrigerant pipe 73, so that the refrigerant in the engine heat pump type cooling / heating device B can be supplied to the heat pump type heater 33. Each of the plurality of indoor units 71 has an indoor heat exchanger 7
5. An indoor air-conditioning blower 76 for sending out the air whose temperature has been adjusted by the indoor heat exchanger 75 to the space to be air-conditioned is provided.

【００２８】前記室外機７２には、電子膨張弁７４，８
９、ガスエンジン７７、ガスエンジン７７にて駆動され
る冷媒圧縮機７８、アキュムレータ７９、四方弁８０、
室外熱交換器８１、その室外熱交換器８２に対し外気を
通風する室外空調用送風機８２、ラジエータ８３、ラジ
エータ用送風機８４、ヒートポンプ運転制御部Ｄなどが
備えられている。また、ガスエンジン７７の冷却用の冷
却水をラジエータ８３との間で循環させる冷却水路８５
が設けられ、この冷却水路８５にラジエター用ポンプＰ
４とエンジン出口側での冷却水温度を検出する冷却水温
度サーミスタ９５が設けられ、ガスエンジン７７の排熱
を回収した冷却水を、加熱用冷却水路９１を通してエン
ジン排熱利用式加熱器３４に供給する加熱状態と、ラジ
エータ８３に供給して放熱される放熱状態とに切り換え
自在な排熱切換機構８６が設けられている。The outdoor unit 72 includes electronic expansion valves 74 and 8.
9, a gas engine 77, a refrigerant compressor 78 driven by the gas engine 77, an accumulator 79, a four-way valve 80,
An outdoor heat exchanger 81, an outdoor air-conditioning blower 82 that ventilates outside air to the outdoor heat exchanger 82, a radiator 83, a radiator blower 84, a heat pump operation control unit D, and the like are provided. A cooling water passage 85 for circulating cooling water for cooling the gas engine 77 with the radiator 83.
The cooling water passage 85 is provided with a radiator pump P
4 and a cooling water temperature thermistor 95 for detecting the cooling water temperature at the engine outlet side. The cooling water obtained by collecting the exhaust heat of the gas engine 77 is supplied to the engine exhaust heat heater 34 through the cooling water passage 91 for heating. An exhaust heat switching mechanism 86 is provided which can be switched between a heating state in which the heat is supplied and a heat radiation state in which the heat is supplied to the radiator 83 and radiated.

【００２９】そして、ヒートポンプ運転手段Ｋが、ガス
エンジン７７、電子膨張弁７４，８９、室内空調用送風
機７６、冷媒圧縮機７８、四方弁８０、室外空調用送風
機８２、低圧側の冷媒圧力を検出する低圧検出手段８
７、高圧側の冷媒圧力を検出する高圧検出手段８８など
により構成され、冷却水循環手段Ｌが、冷却水路８５、
加熱用冷却水路９１、ラジエータ用ポンプＰ４、ラジエ
ータ用送風機８４、排熱切換機構８６、冷却水温度サー
ミスタ９５などにより構成されている。The heat pump operating means K detects the gas engine 77, the electronic expansion valves 74 and 89, the indoor air blower 76, the refrigerant compressor 78, the four-way valve 80, the outdoor air blower 82, and the low pressure side refrigerant pressure. Low pressure detecting means 8
7. The cooling water circulating means L includes a high-pressure detecting means 88 for detecting the refrigerant pressure on the high-pressure side.
The cooling water channel 91 for heating, the radiator pump P4, the radiator blower 84, the exhaust heat switching mechanism 86, the cooling water temperature thermistor 95, and the like are provided.

【００３０】前記貯湯ユニット制御部Ｃとヒートポンプ
運転制御部Ｄとは、エンジンヒートポンプ式冷暖房装置
Ｂが空調運転中であることや、エンジンヒートポンプ式
冷暖房装置Ｂへの駆動要求などの制御信号を送受信可能
に構成にされ、図３に示すように、空調対象空間として
の各部屋に設置されている空調リモコン９３および貯湯
リモコン９２の指令に基づいて、空調対象空間への空調
冷房運転や空調暖房運転などの空調運転、貯湯タンク１
内に湯水を貯湯する貯湯運転、外部放熱部２にて放熱す
る放熱運転、貯湯タンク１内の貯湯量が最低確保量未満
のときに給湯する給湯優先運転などの運転制御を実行す
るように構成されている。The hot water storage unit control section C and the heat pump operation control section D can transmit and receive control signals such as the fact that the engine heat pump type cooling / heating device B is in air-conditioning operation and a drive request to the engine heat pump type cooling / heating device B. As shown in FIG. 3, based on commands from an air-conditioning remote controller 93 and a hot-water storage remote controller 92 installed in each room as an air-conditioning target space, air-conditioning cooling operation, air-conditioning heating operation, etc. Air conditioning operation, hot water storage tank 1
It is configured to execute operation control such as a hot-water storage operation for storing hot water therein, a heat-dissipation operation for dissipating heat in the external heat-dissipating unit 2, and a hot-water supply priority operation for supplying hot water when the amount of hot water stored in the hot-water storage tank 1 is less than the minimum secured amount. Have been.

【００３１】前記エンジンヒートポンプ式冷暖房装置Ｂ
の運転について説明すると、空調リモコン９３から空調
冷房要求や空調暖房要求などの空調要求があると、ヒー
トポンプ運転制御部Ｄがヒートポンプ運転手段Ｋおよび
冷却水循環手段Ｌの運転を制御し、空調リモコン９３に
よる空調要求に基づいて、ガスエンジン７７により圧縮
機７８を作動させて、四方弁８０の切換え操作により空
調冷房運転と空調暖房運転とを選択切換え、室内機７１
の電子膨張弁７４の開閉制御により、各空調対象空間へ
の空調を切り換えて、ヒートポンプ運転手段Ｋを制御す
るように構成されている。The engine heat pump type cooling / heating device B
When the air-conditioning remote controller 93 receives an air-conditioning request such as an air-conditioning cooling request or an air-conditioning / heating request, the heat pump operation control unit D controls the operation of the heat pump operation means K and the cooling water circulation means L. The compressor 78 is operated by the gas engine 77 based on the air conditioning request, and the air conditioner cooling operation and the air conditioning heating operation are selectively switched by the switching operation of the four-way valve 80, and the indoor unit 71 is operated.
By controlling the opening and closing of the electronic expansion valve 74, air conditioning to each air conditioning target space is switched, and the heat pump operating means K is controlled.

【００３２】すなわち、ヒートポンプ運転制御部Ｄは、
空調リモコン９３から空調冷房要求があると、空調冷房
要求がある部屋に相当する電子膨張弁７４を開状態にし
て、室内熱交換器７５を蒸発器として機能させて、空調
対象空間への供給空気を冷却温調し、室外熱交換器８１
を凝縮器として機能させて外気に対して放熱させるよう
に、ヒートポンプ運転手段Ｋを制御して空調冷房運転を
実行する。また、ヒートポンプ運転制御部Ｄは、空調リ
モコン９３から空調暖房要求があると、空調暖房要求が
ある部屋に相当する電子膨張弁７４を開状態にして、室
内熱交換器７５を凝縮器として機能させて、空調対象空
間への供給空気を加熱温調し、室外熱交換器８１を蒸発
器として機能させて外気から吸熱させるように、ヒート
ポンプ運転手段Ｋを制御して空調暖房運転を実行する。That is, the heat pump operation control unit D
When a request for air-conditioning cooling is issued from the air-conditioning remote controller 93, the electronic expansion valve 74 corresponding to the room for which the air-conditioning cooling request is made is opened, and the indoor heat exchanger 75 functions as an evaporator to supply air to the space to be air-conditioned. Temperature of the outdoor heat exchanger 81
The heat pump operating means K is controlled to execute the air-conditioning / cooling operation so that the air conditioner functions as a condenser and releases heat to the outside air. Further, when there is a request for air conditioning and heating from the air conditioning remote controller 93, the heat pump operation control unit D opens the electronic expansion valve 74 corresponding to the room for which the air conditioning and heating request is made, and causes the indoor heat exchanger 75 to function as a condenser. Then, the air-conditioning and heating operation is executed by controlling the heat pump operating means K such that the temperature of the air supplied to the space to be air-conditioned is controlled and the outdoor heat exchanger 81 functions as an evaporator to absorb heat from the outside air.

【００３３】尚、ヒートポンプ運転制御部Ｄは、空調冷
房運転においても、空調暖房運転においても、冷媒圧力
が設定目標圧力になるように、冷媒圧縮機７８の回転速
度を、検出した冷媒圧力と設定目標圧力との偏差に基づ
いてフィードバック制御し、その制御における時定数は
充分大きく設定されていて、回転速度の増減変更は緩や
かな速度で行われる。The heat pump operation control unit D sets the rotational speed of the refrigerant compressor 78 to the detected refrigerant pressure so that the refrigerant pressure becomes the set target pressure in both the air conditioning cooling operation and the air conditioning heating operation. Feedback control is performed based on the deviation from the target pressure, the time constant in the control is set to be sufficiently large, and the increase or decrease of the rotation speed is performed at a gentle speed.

【００３４】そして、冷却水循環手段Ｌは、空調冷房運
転において、ラジエータ用ポンプＰ４を作動させ、ラジ
エータ用送風機８４を作動させラジエータ８３にて放熱
させるようにし、エンジン排熱利用式加熱器３４にて加
熱可能なときには、冷却水路８５を通流する冷却水が加
熱用設定温度以上になると、排熱切換機構８６を加熱状
態に切り換えて、冷却水をエンジン排熱利用式加熱器３
４に供給するようにしている。また、空調暖房運転にお
いて、ラジエータ用ポンプＰ４を作動させ、ラジエータ
用送風機８４を作動させラジエータ８３にて放熱させる
ようにし、エンジン排熱利用式加熱器３４にて加熱可能
なときには、暖房負荷が小さくかつ冷却水路８５を通流
する冷却水が加熱用設定温度以上になると、排熱切換機
構８６を加熱状態に切り換えて、冷却水をエンジン排熱
利用式加熱器３４に供給するようにしている。The cooling water circulating means L activates the radiator pump P4, activates the radiator blower 84 and causes the radiator 83 to radiate heat in the air conditioning and cooling operation. When the heating is possible, when the cooling water flowing through the cooling water passage 85 becomes equal to or higher than the heating set temperature, the exhaust heat switching mechanism 86 is switched to the heating state, and the cooling water is supplied to the engine exhaust heat heater 3
4 is supplied. In the air-conditioning / heating operation, the radiator pump P4 is operated, the radiator blower 84 is operated, and heat is radiated by the radiator 83. When the heater 34 can heat the engine, the heating load is reduced. When the temperature of the cooling water flowing through the cooling water passage 85 becomes equal to or higher than the set temperature for heating, the exhaust heat switching mechanism 86 is switched to the heating state, and the cooling water is supplied to the engine exhaust heat heater 34.

【００３５】前記空調冷房運転においては、室内熱交換
器７５を蒸発器として機能させて空調対象空間への供給
空気を冷却温調し、室外熱交換器８１を凝縮器として機
能させて外気に対して放熱するようにしている。この空
調冷房運転では、ヒートポンプ運転制御部Ｄは、低圧検
出手段８７の検出情報に基づいて、その検出圧力が冷房
用の目標圧力になるようにガスエンジン７７の回転速度
を制御するようにしている。また、空調冷房運転におい
て、ヒートポンプ運転制御部Ｄは、排熱切換機構８６を
加熱状態に切り換えて冷却水をエンジン排熱利用式加熱
器３４に供給し、循環路３を通流する湯水をエンジン排
熱で加熱するようにしている。In the air-conditioning / cooling operation, the indoor heat exchanger 75 functions as an evaporator to control the temperature of the air supplied to the air-conditioned space, and the outdoor heat exchanger 81 functions as a condenser to control the outside air. To dissipate heat. In the air-conditioning / cooling operation, the heat pump operation control unit D controls the rotation speed of the gas engine 77 based on the detection information of the low-pressure detection means 87 so that the detected pressure becomes the target pressure for cooling. . In the air-conditioning / cooling operation, the heat pump operation control unit D switches the exhaust heat switching mechanism 86 to a heating state to supply the cooling water to the engine exhaust heat utilization type heater 34 and to supply the hot water flowing through the circulation path 3 to the engine. It is heated by waste heat.

【００３６】前記空調冷房運転における冷媒の流れにつ
いて説明を加えると、冷媒圧縮機７８から吐出される高
圧乾き蒸気冷媒を、四方弁８０を介して室外熱交換器８
１に供給し、この室外熱交換器８１において外気との熱
交換により凝縮される。そして、室外熱交換器８１から
送出される凝縮工程通過冷媒を、電子膨張弁７４を介し
て室内熱交換器７５に供給し、この室内熱交換器７５に
おいて冷却対象空気との熱交換により蒸発される。その
後、室内熱交換器７５から送出される低圧乾き蒸気冷媒
を、四方弁８０およびアキュムレータ７９を介して冷媒
圧縮機７８の吸入口に戻す。The flow of the refrigerant in the air-conditioning / cooling operation will be further described. The high-pressure dry vapor refrigerant discharged from the refrigerant compressor 78 is supplied to the outdoor heat exchanger 8 through the four-way valve 80.
1 and condensed in the outdoor heat exchanger 81 by heat exchange with the outside air. Then, the refrigerant that has passed through the condensation step and is sent from the outdoor heat exchanger 81 is supplied to the indoor heat exchanger 75 via the electronic expansion valve 74, and is evaporated by the heat exchange with the air to be cooled in the indoor heat exchanger 75. You. Thereafter, the low-pressure dry vapor refrigerant delivered from the indoor heat exchanger 75 is returned to the suction port of the refrigerant compressor 78 via the four-way valve 80 and the accumulator 79.

【００３７】前記空調暖房運転においては、室内熱交換
器７５を凝縮器として機能させて空調対象空間への供給
空気を加熱温調し、室外熱交換器８１を蒸発器として機
能させて外気から吸熱するようにしている。この空調暖
房運転では、ヒートポンプ運転制御部Ｄは、高圧検出手
段８８の検出情報に基づいて、その検出圧力が暖房用の
目標圧力になるようにガスエンジン７７の回転速度を制
御するようにしている。また、この空調暖房運転におい
て、加熱用冷媒配管９０を通してヒートポンプ式加熱器
３３に高圧冷媒を供給する加熱用運転により、循環路３
を通流する湯水を加熱するようにしている。In the air-conditioning and heating operation, the indoor heat exchanger 75 functions as a condenser to heat and control the temperature of air supplied to the space to be air-conditioned, and the outdoor heat exchanger 81 functions as an evaporator to absorb heat from outside air. I am trying to do it. In this air-conditioning / heating operation, the heat pump operation control unit D controls the rotation speed of the gas engine 77 based on the detection information of the high-pressure detection means 88 so that the detected pressure becomes the target pressure for heating. . In this air-conditioning and heating operation, the heating operation for supplying the high-pressure refrigerant to the heat pump heater 33 through the heating refrigerant pipe 90 causes the circulation path 3
The hot water flowing through is heated.

【００３８】前記空調暖房運転における冷媒の流れにつ
いて説明を加えると、電子膨張弁７４，８９が所定開度
になるように制御する初期制御を行い、高圧検出手段８
８の検出圧力が目標圧力になるように、ガスエンジン７
７の回転数を増減して、冷媒圧縮機７８の回転速度を制
御し、冷媒圧縮機７８から吐出される高圧乾き蒸気冷媒
を、四方弁８０を介して室内熱交換器７５およびヒート
ポンプ式加熱器３３に供給し、室内熱交換器７５におい
ては加熱対象空気との熱交換により凝縮され、ヒートポ
ンプ式加熱器３３においては循環路３の湯水との熱交換
により凝縮される。The flow of the refrigerant in the air-conditioning / heating operation will be further described. Initial control for controlling the electronic expansion valves 74 and 89 to a predetermined opening degree is performed.
8 so that the detected pressure of the gas engine 8 becomes the target pressure.
7, the rotation speed of the refrigerant compressor 78 is controlled, and the high-pressure dry vapor refrigerant discharged from the refrigerant compressor 78 is passed through the four-way valve 80 to the indoor heat exchanger 75 and the heat pump heater. 33, and is condensed by heat exchange with the air to be heated in the indoor heat exchanger 75, and is condensed by heat exchange with hot water in the circulation path 3 in the heat pump heater 33.

【００３９】そして、室内熱交換器７５から送出される
凝縮工程通過冷媒を、電子膨張弁７４を介して室外熱交
換器８１に供給するとともに、ヒートポンプ式加熱器３
３から送出される凝縮工程通過冷媒を、電子膨張弁８９
を介して室外熱交換器８１に供給して、この室外熱交換
器８１において外気との熱交換により蒸発される。その
後、室外熱交換器８１から送出される低圧乾き蒸気冷媒
を四方弁８０およびアキュムレータ７９を介して冷媒圧
縮機７８の吸入口に戻す。Then, the refrigerant that has passed through the condensation step and is sent from the indoor heat exchanger 75 is supplied to the outdoor heat exchanger 81 via the electronic expansion valve 74, and the heat pump heater 3
The refrigerant that has passed through the condensation step and is sent from the electronic expansion valve 89
The heat is supplied to the outdoor heat exchanger 81 through the heat exchanger, and is evaporated in the outdoor heat exchanger 81 by heat exchange with the outside air. Thereafter, the low-pressure dry vapor refrigerant sent from the outdoor heat exchanger 81 is returned to the suction port of the refrigerant compressor 78 via the four-way valve 80 and the accumulator 79.

【００４０】尚、電子膨張弁７４，８９の初期制御が完
了したあとは、室内熱交換器７５やヒートポンプ式加熱
器３３の下流側における冷媒温度を冷媒温度センサ９６
で検出して、この検出温度が飽和液温度から所定値を引
いた目標温度になるように、電子膨張弁７４，８９の開
度を調整するサブクール制御を実行する。つまり、サブ
クール制御は、室内熱交換器７５やヒートポンプ式加熱
器３３で凝縮して放熱し、その結果、冷却された冷媒の
温度を冷媒温度センサ９６で検出して、その検出温度
が、高圧検出手段８８で検出した検出圧力を基にして予
めメモリに記憶されているデータから求まる飽和液温度
よりも、所定値( サブクール値) だけ低くなるように電
子膨張弁７４，８９の開度を調整する。After the initial control of the electronic expansion valves 74 and 89 is completed, the refrigerant temperature downstream of the indoor heat exchanger 75 and the heat pump heater 33 is measured by a refrigerant temperature sensor 96.
The subcool control for adjusting the openings of the electronic expansion valves 74 and 89 is executed so that the detected temperature becomes a target temperature obtained by subtracting a predetermined value from the saturated liquid temperature. That is, in the subcool control, the refrigerant is condensed and radiated in the indoor heat exchanger 75 and the heat pump heater 33, and as a result, the temperature of the cooled refrigerant is detected by the refrigerant temperature sensor 96, and the detected temperature is detected as the high pressure detection. The opening degrees of the electronic expansion valves 74 and 89 are adjusted so that the temperature is lower by a predetermined value (subcool value) than the saturated liquid temperature obtained from data stored in the memory in advance based on the detected pressure detected by the means 88. .

【００４１】そして、飽和液温度から所定値を引いた目
標温度に対して冷媒温度センサ９６による検出温度が高
いほど、電子膨張弁７４，８９の開度を小さくすること
により、冷媒の循環量が減少して、その分、所定冷媒量
当たりの放熱量が増加して冷媒温度センサ９６による検
出温度が低下し、かつ、高圧検出手段８８による検出圧
力が増加して飽和液温度が上昇して、冷媒温度センサ９
６による検出温度を目標温度と略同等にすることができ
る。また、目標温度に対して冷媒温度センサ９６による
検出温度が低いほど、電子膨張弁７４，８９の開度を大
きくすることにより、冷媒の循環量が増加して、その
分、所定冷媒量当たりの放熱量が減少して冷媒温度セン
サ９６による検出温度が上昇し、かつ、高圧検出手段８
８による検出圧力が減少して飽和液温度が低下して、冷
媒温度センサ９６による検出温度を目標温度と略同等に
することができる。Then, the higher the temperature detected by the refrigerant temperature sensor 96 with respect to the target temperature obtained by subtracting a predetermined value from the saturated liquid temperature, the smaller the degree of opening of the electronic expansion valves 74 and 89, thereby reducing the circulation amount of the refrigerant. The amount of heat radiation per predetermined amount of refrigerant increases accordingly, the temperature detected by the refrigerant temperature sensor 96 decreases, and the pressure detected by the high-pressure detecting means 88 increases, and the saturated liquid temperature increases. Refrigerant temperature sensor 9
6 can be made substantially equal to the target temperature. Also, as the temperature detected by the refrigerant temperature sensor 96 is lower than the target temperature, the degree of opening of the electronic expansion valves 74 and 89 is increased to increase the circulation amount of the refrigerant. The amount of heat radiation decreases, the temperature detected by the refrigerant temperature sensor 96 increases, and the high-pressure detecting means 8
8, the saturated liquid temperature decreases, and the temperature detected by the refrigerant temperature sensor 96 can be made substantially equal to the target temperature.

【００４２】また、貯湯ユニット制御部Ｃには、貯湯タ
ンク１内の貯湯量Ｒを検出する貯湯量検出手段Ｍや、貯
湯タンク１に貯湯する目標貯湯量Ｒａを設定する目標貯
湯量設定手段Ｎなどが設けられている。前記貯湯量検出
手段Ｍと目標貯湯量設定手段Ｎはプログラム形式で設け
られ、貯湯量検出手段Ｍは、貯湯温度サーミスタＳ１，
Ｓ２，Ｓ３，Ｓ４のうちで貯湯設定温度Ｔｅ以上の温度
を検出する最下位の貯湯温度サーミスタがいずれの貯湯
温度サーミスタＳ１，Ｓ２，Ｓ３，Ｓ４であるかによ
り、その貯湯温度サーミスタＳ１，Ｓ２，Ｓ３，Ｓ４の
検出位置に対応する量として予め設定されている量の湯
水を貯湯量Ｒとして検出するように構成され、目標貯湯
量設定手段Ｎは、４個の貯湯温度サーミスタＳ１，Ｓ
２，Ｓ３，Ｓ４のいずれかに対応する貯湯量Ｒを目標貯
湯量Ｒａとして設定するように構成されている。The hot water storage unit controller C includes a hot water storage amount detecting means M for detecting the hot water storage amount R in the hot water storage tank 1 and a target hot water storage amount setting means N for setting a target hot water storage amount Ra for storing the hot water in the hot water storage tank 1. And so on. The hot water storage amount detection means M and the target hot water storage amount setting means N are provided in the form of a program, and the hot water storage amount detection means M includes a hot water storage temperature thermistor S1,
The hot water storage temperature thermistors S1, S2, S3, and S4, which detect the lowest temperature of the hot water storage temperature Te among S2, S3, and S4, are determined based on which of the hot water storage temperature thermistors S1, S2, S3, and S4. The target hot water storage amount setting means N is configured to detect a predetermined amount of hot water as the hot water storage amount R as an amount corresponding to the detection positions of S3 and S4, and the four hot water storage temperature thermistors S1, S
The hot water storage amount R corresponding to any one of S2, S3, and S4 is set as the target hot water storage amount Ra.

【００４３】そして、最上部の貯湯温度サーミスタＳ１
に対応する貯湯量Ｒが最低確保量Ｒmin として、上から
２番目の貯湯温度サーミスタＳ２に対応する貯湯量Ｒが
小貯湯量Ｒs として、上から３番目の貯湯温度サーミス
タＳ３に対応する貯湯量Ｒが中貯湯量Ｒm として、ま
た、最下部の貯湯温度サーミスタＳ４に対応する貯湯量
Ｒが最大貯湯量Ｒmax として、夫々、予め設定されてい
る。ちなみに、本実施形態では、最低確保量Ｒmin が１
７リットル、小貯湯量Ｒsが３０リットル、中貯湯量Ｒm
が７０リットル、最大貯湯量Ｒmax が１１３リットル
として設定されている。Then, the hot water storage temperature thermistor S1 at the uppermost part
Is the minimum reserved amount Rmin, the hot water storage amount R corresponding to the second hot water temperature thermistor S2 from the top is the small hot water storage amount Rs, and the hot water storage amount R corresponding to the third hot water temperature thermistor S3 from the top. Is set in advance as the middle hot water storage amount Rm, and the hot water storage amount R corresponding to the lowest hot water storage temperature thermistor S4 is set as the maximum hot water storage amount Rmax. Incidentally, in the present embodiment, the minimum secured amount Rmin is 1
7 liters, small hot water volume Rs is 30 liters, medium hot water volume Rm
Is set to 70 liters and the maximum hot water storage amount Rmax is set to 113 liters.

【００４４】次に、貯湯ユニットＡの運転について説明
すると、貯湯リモコン９２の要求指令やヒートポンプ運
転手段Ｋの運転状態などに基づいて、貯湯ユニット制御
部Ｃが、湯水循環手段Ｅ、循環調整手段Ｆ、給湯操作手
段Ｇ、風呂操作手段Ｈ、暖房操作手段Ｊ、補助加熱器３
４の夫々の運転を制御して、貯湯運転、放熱運転、およ
び、給湯優先運転などの運転を実行するように構成され
ている。Next, the operation of the hot water storage unit A will be described. Based on a request command from the hot water storage remote controller 92 and the operation state of the heat pump operating means K, the hot water storage unit control section C performs hot water circulation means E and circulation adjustment means F. Hot water supply operation means G, bath operation means H, heating operation means J, auxiliary heater 3
4 are controlled to execute operations such as a hot-water storage operation, a heat-dissipation operation, and a hot-water supply priority operation.

【００４５】前記湯水循環手段Ｅについて具体的に説明
すると、この湯水循環手段Ｅは、貯湯タンク１に湯水を
貯湯するときに、貯湯運転状態としてのヒートポンプ貯
湯運転状態( 以下、ＨＰ貯湯運転状態という) および補
助加熱貯湯運転状態、貯湯初期運転状態としてのヒート
ポンプ貯湯初期運転状態( 以下、ＨＰ貯湯初期運転状態
という) 、補助加熱貯湯初期運転状態の夫々に切り換え
られ、外部放熱部２にて放熱するときに、追焚き運転状
態、暖房運転状態、追焚き・暖房同時運転状態の夫々に
切り換えられるように構成されている。The hot water circulation means E will be described in detail. When the hot water circulation means E stores hot water in the hot water storage tank 1, the heat pump hot water storage operation state (hereinafter referred to as the HP hot water storage operation state) as the hot water storage operation state. ), An auxiliary heating hot water storage operation state, a heat pump hot water storage initial operation state as an initial hot water storage operation state (hereinafter referred to as an HP hot water storage initial operation state), and an auxiliary heating hot water storage initial operation state. At this time, it is configured to be able to switch between the additional heating operation state, the heating operation state, and the additional heating / heating simultaneous operation state.

【００４６】そして、貯湯タンク１に湯水を貯湯すると
きには、ヒートポンプ式加熱器３３または補助加熱器３
５にて加熱された湯水の温度が貯湯許容温度に満たない
ときには、ＨＰ貯湯初期運転状態または補助加熱貯湯初
期運転状態に切り換えて貯湯タンク１内の湯水を循環さ
せ、ヒートポンプ式加熱器３３または補助加熱器３５に
て加熱された湯水の温度が貯湯許容温度になると、ＨＰ
貯湯運転状態または補助加熱貯湯運転状態に切り換えて
貯湯タンク１に貯湯するようにしている。また、外部放
熱部２にて放熱するときには、追焚き要求のみの要求が
あると、追焚き運転状態に切り換え、暖房要求のみの要
求があると、暖房運転状態に切り換え、追焚き要求およ
び暖房要求の両要求があると、追焚き・暖房同時運転状
態に切り換えるようにしている。When hot water is stored in the hot water storage tank 1, the heat pump type heater 33 or the auxiliary heater 3
When the temperature of the hot water heated at 5 is lower than the hot water storage allowable temperature, the hot water storage initial operation state or the auxiliary heating hot water storage initial operation state is switched to circulate the hot water in the hot water storage tank 1, and the heat pump type heater 33 or the auxiliary pump is operated. When the temperature of the hot water heated by the heater 35 reaches the hot water storage allowable temperature, HP
The hot water storage operation state or the auxiliary heating hot water storage operation state is switched to store hot water in hot water storage tank 1. Further, when heat is radiated by the external heat radiating unit 2, if there is only a request for additional heating, the operation is switched to the additional heating operation state, and if there is only a request for heating, the operation is switched to the heating operation state. When both of these requirements are met, the system is switched to the reheating / heating simultaneous operation state.

【００４７】以下、湯水循環手段Ｅの夫々の状態につい
て説明を加える。なお、この湯水循環手段Ｅの夫々の状
態における説明において、上部開閉弁２８、戻し開閉弁
２９、暖房用開閉弁４４、風呂用開閉弁４５、ヒートポ
ンプ用開閉弁６０、補助用断続開閉弁６３、ヒートポン
プバイパス開閉弁６９，および、補助バイパス開閉弁７
０の開閉状態について、開弁させる開閉弁のみを記載
し、記載していない開閉弁については閉弁させるものと
する。The respective states of the hot and cold water circulation means E will be described below. In the description of the respective states of the hot and cold water circulating means E, the upper opening / closing valve 28, the return opening / closing valve 29, the heating opening / closing valve 44, the bath opening / closing valve 45, the heat pump opening / closing valve 60, the auxiliary intermittent opening / closing valve 63, Heat pump bypass on-off valve 69 and auxiliary bypass on-off valve 7
For the open / close state of 0, only the open / close valves to be opened are described, and the open / close valves not described are closed.

【００４８】前記ＨＰ貯湯運転状態においては、上部開
閉弁２８および補助バイパス開閉弁７０を開弁させると
ともに、循環ポンプＰ１を作動させ、貯湯タンク１内に
湯水が温度成層を形成して貯湯させるように、貯湯タン
ク１の底部から取り出した湯水をヒートポンプ式加熱器
３３にて加熱したのち、その温水を補助加熱器３５を迂
回して貯湯タンク１の上部に戻すようにしている。前記
補助加熱貯湯運転状態においては、上部開閉弁２８およ
び補助用断続開閉弁６３を開弁させるとともに、循環ポ
ンプＰ１を作動させ、貯湯タンク１内に湯水が温度成層
を形成して貯湯させるように、貯湯タンク１の底部から
取り出した湯水を補助加熱器３５にて加熱したのち、そ
の温水を貯湯タンク１の上部に戻すようにしている。In the HP hot water storage operation state, the upper opening / closing valve 28 and the auxiliary bypass opening / closing valve 70 are opened, and the circulation pump P1 is operated so that the hot water forms a temperature stratification in the hot water storage tank 1 to store the hot water. Then, after the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heat pump type heater 33, the hot water is returned to the upper part of the hot water storage tank 1 by bypassing the auxiliary heater 35. In the auxiliary heating hot water storage operation state, the upper opening / closing valve 28 and the auxiliary intermittent opening / closing valve 63 are opened, and the circulation pump P1 is operated so that the hot and cold water forms a temperature stratification in the hot water storage tank 1 to store the hot water. After the hot water taken out from the bottom of the hot water storage tank 1 is heated by the auxiliary heater 35, the hot water is returned to the upper portion of the hot water storage tank 1.

【００４９】前記ＨＰ貯湯初期運転状態においては、戻
し開閉弁２９、暖房用開閉弁４４および補助バイパス開
閉弁７０を開弁させるとともに、循環ポンプＰ１を作動
させ、貯湯タンク１の底部から取り出した湯水をヒート
ポンプ式加熱器３３にて加熱したのち、その湯水を補助
加熱器３５を迂回して貯湯タンク１の底部に戻すように
している。前記補助加熱貯湯初期運転状態においては、
戻し開閉弁２９、暖房用開閉弁４４および補助用断続開
閉弁６３を開弁させるとともに、循環ポンプＰ１を作動
させ、貯湯タンク１の底部から取り出した湯水を補助加
熱器３５にて加熱したのち、その湯水を貯湯タンク１の
底部に戻すようにしている。In the HP hot water storage initial operation state, the return opening / closing valve 29, the heating opening / closing valve 44, and the auxiliary bypass opening / closing valve 70 are opened, and the circulation pump P1 is operated, and the hot and cold water removed from the bottom of the hot water storage tank 1 is opened. Is heated by the heat pump type heater 33, and the hot water is returned to the bottom of the hot water storage tank 1 bypassing the auxiliary heater 35. In the auxiliary heating hot water storage initial operation state,
After opening the return on-off valve 29, the on-off valve for heating 44, and the on-off valve 63 for auxiliary operation, the circulation pump P1 is operated, and the hot water taken out from the bottom of the hot water storage tank 1 is heated by the auxiliary heater 35. The hot water is returned to the bottom of the hot water storage tank 1.

【００５０】前記追焚き運転状態においては、ヒートポ
ンプ式加熱器３３にて加熱するときは、風呂用開閉弁４
５、ヒートポンプ用開閉弁６０および補助バイパス開閉
弁７０を開弁させるとともに、循環ポンプＰ１を作動さ
せて、ヒートポンプ式加熱器３３にて加熱された温水を
風呂用熱交換部４３にて放熱させたのち、その全量を貯
湯タンク１を迂回してヒートポンプ式加熱器３３に戻
し、補助加熱器３５にて加熱するときは、風呂用開閉弁
４５、補助用断続開閉弁６３およびヒートポンプバイパ
ス開閉弁６９を開弁させるとともに、循環ポンプＰ１を
作動させて、補助加熱器３５にて加熱された温水を風呂
用熱交換部４３にて放熱させたのち、その全量を貯湯タ
ンク１とヒートポンプ式加熱器３３とを迂回して補助加
熱器３５に戻すようにしている。In the additional heating operation state, when heating by the heat pump type heater 33, the on-off valve 4 for bath is used.
5. The heat pump on-off valve 60 and the auxiliary bypass on-off valve 70 are opened, and the circulation pump P1 is operated to release the hot water heated by the heat pump heater 33 in the bath heat exchange unit 43. Thereafter, when the whole amount is returned to the heat pump type heater 33 bypassing the hot water storage tank 1 and heated by the auxiliary heater 35, the bath on-off valve 45, the auxiliary intermittent on-off valve 63, and the heat pump bypass on-off valve 69 are turned on. After the valve is opened, the circulation pump P1 is operated, and the hot water heated by the auxiliary heater 35 is radiated by the bath heat exchange unit 43. Is bypassed and returned to the auxiliary heater 35.

【００５１】前記暖房運転状態においては、暖房用開閉
弁４４、補助用断続開閉弁６３およびヒートポンプバイ
パス開閉弁６９を開弁させるとともに、循環ポンプＰ１
を作動させ、補助加熱器３５にて加熱された温水を暖房
用熱交換部４２にて放熱させたのち、その全量を貯湯タ
ンク１とヒートポンプ式加熱器３３とを迂回して補助加
熱器３５に戻すようにしている。前記追焚き・暖房同時
運転状態においては、暖房用開閉弁４４、風呂用開閉弁
４５、補助用断続開閉弁６３およびヒートポンプバイパ
ス開閉弁６９を開弁させるとともに、循環ポンプＰ１を
作動させ、補助加熱器３５にて加熱された温水を風呂用
熱交換部４３および暖房用熱交換部４２にて放熱させた
のち、その全量を貯湯タンク１とヒートポンプ式加熱器
３３とを迂回して補助加熱器３５に戻すようにしてい
る。In the heating operation state, the heating on-off valve 44, the auxiliary intermittent on-off valve 63, and the heat pump bypass on-off valve 69 are opened, and the circulation pump P1 is opened.
And the hot water heated by the auxiliary heater 35 is radiated by the heating heat exchanging section 42, and the entire amount is bypassed to the hot water storage tank 1 and the heat pump heater 33 to the auxiliary heater 35. I try to put it back. In the additional heating / heating simultaneous operation state, the heating opening / closing valve 44, the bath opening / closing valve 45, the auxiliary intermittent opening / closing valve 63, and the heat pump bypass opening / closing valve 69 are opened, and the circulation pump P1 is operated to activate the auxiliary heating. After the hot water heated by the heater 35 is radiated by the bath heat exchange unit 43 and the heating heat exchange unit 42, the whole amount is bypassed by the hot water storage tank 1 and the heat pump type heater 33 and the auxiliary heater 35. To return to.

【００５２】前記貯湯ユニット制御部Ｃの運転として、
貯湯運転、放熱運転、および、給湯優先運転について説
明する。前記貯湯運転は、エンジンヒートポンプ式冷暖
房装置Ｂが空調暖房運転中であるか否かにより、ヒート
ポンプ貯湯運転( 以下、ＨＰ貯湯運転という) または補
助加熱貯湯運転のいずれかを選択して実行され、エンジ
ンヒートポンプ式冷暖房装置Ｂが空調暖房運転中に貯湯
リモコン９２から指令される加熱要求としての貯湯要求
があると、補助加熱器３５を運転させて貯湯する補助加
熱貯湯運転を実行させて補助加熱優先運転を実行し、エ
ンジンヒートポンプ式冷暖房装置Ｂが空調暖房運転中で
はないときに貯湯要求があると、エンジンヒートポンプ
式冷暖房装置Ｂを空調暖房運転させて貯湯するＨＰ貯湯
運転を実行させてヒートポンプ優先運転を実行するよう
に構成されている。The operation of the hot water storage unit control section C is as follows.
The hot water storage operation, the heat radiation operation, and the hot water supply priority operation will be described. The hot water storage operation is performed by selecting either the heat pump hot water storage operation (hereinafter, referred to as HP hot water storage operation) or the auxiliary heating hot water storage operation, depending on whether the engine heat pump cooling / heating device B is performing the air conditioning / heating operation. When the heat pump type cooling / heating device B receives a hot water storage request as a heating request instructed from the hot water storage remote control 92 during the air conditioning / heating operation, the auxiliary heating device 35 is operated to execute the auxiliary heating hot water storage operation for storing hot water, thereby performing the auxiliary heating priority operation. And if there is a hot water storage request when the engine heat pump type cooling / heating device B is not in the air conditioning / heating operation, the engine heat pump type cooling / heating device B is operated in the air conditioning / heating operation to perform the HP hot water storage operation for storing hot water, and the heat pump priority operation is performed. It is configured to run.

【００５３】そして、エンジンヒートポンプ式冷暖房装
置Ｂが空調暖房運転中に空調リモコン９３からの空調暖
房要求が解除された状態において、貯湯要求があると、
エンジンヒートポンプ式冷暖房装置Ｂの運転を継続した
ままＨＰ貯湯運転を実行するように構成されている。ま
た、ＨＰ貯湯運転中に、エンジンヒートポンプ式冷暖房
装置Ｂへの空調暖房要求があると、ガスエンジン７７の
回転速度や暖房要求されている部屋の暖房負荷などに基
づいて、ＨＰ貯湯運転を継続している状態でのエンジン
ヒートポンプ式冷暖房装置Ｂの空調能力が空調負荷に対
して余裕があるのか不足しているのかを判別し、空調能
力に余裕があるときには、ＨＰ貯湯運転を継続するとと
もに、エンジンヒートポンプ式冷暖房装置Ｂにて空調暖
房運転させる空調追加運転を実行し、空調能力が不足し
ているときには、ＨＰ貯湯運転から補助加熱貯湯運転に
切り換えかつエンジンヒートポンプ式冷暖房装置Ｂにて
空調暖房運転させるように構成されている。Then, when the air conditioning / heating request from the air conditioning remote controller 93 is released while the engine heat pump type cooling / heating device B is in the air conditioning / heating operation, if there is a hot water storage request,
The configuration is such that the HP hot-water storage operation is performed while the operation of the engine heat pump type cooling / heating device B is continued. Also, if there is a request for air conditioning and heating to the engine heat pump type cooling / heating device B during the HP hot water storage operation, the HP hot water storage operation is continued based on the rotation speed of the gas engine 77, the heating load of the room for which heating is required, and the like. It is determined whether the air conditioning capacity of the engine heat pump type cooling and heating apparatus B in the state where the air conditioner is in a state where the air conditioning load has a margin or is insufficient. When the air conditioning capacity has the margin, the HP hot water storage operation is continued and the engine is operated. An additional air-conditioning operation for performing the air-conditioning and heating operation by the heat pump type heating and cooling device B is executed. When the air-conditioning capacity is insufficient, the operation is switched from the HP hot water storage operation to the auxiliary heating hot-water storage operation and the engine heat pump type cooling and heating device B is operated for air conditioning and heating. It is configured as follows.

【００５４】前記貯湯運転におけるＨＰ貯湯運転につい
て具体的に説明すると、まず、エンジンヒートポンプ式
冷暖房装置Ｂを暖房運転させて高圧冷媒をヒートポンプ
式加熱器３３に供給するととともに、湯水循環手段Ｅを
ＨＰ貯湯初期運転状態にて運転させ、貯湯タンク１内の
湯水をヒートポンプ式加熱器３３にて加熱させる。そし
て、貯湯サーミスタ６６にて検出される温度が貯湯許容
温度以上になると、湯水循環手段ＥをＨＰ貯湯初期運転
状態からＨＰ貯湯運転状態に切り換えるとともに、貯湯
タンク１の上部に貯湯される温水の温度が貯湯設定温度
となるように、貯湯サーミスタ６６の検出情報に基づい
て循環用水比例バルブ６５の開度を調整するようにして
いる。The HP hot water storage operation in the hot water storage operation will be specifically described. First, the engine heat pump type cooling / heating device B is heated to supply high-pressure refrigerant to the heat pump type heater 33, and the hot water circulation means E The operation is performed in the initial operation state, and the hot water in the hot water storage tank 1 is heated by the heat pump heater 33. When the temperature detected by the hot water storage thermistor 66 becomes equal to or higher than the allowable hot water storage temperature, the hot water circulation means E is switched from the HP hot water storage initial operation state to the HP hot water storage operation state, and the temperature of the hot water stored in the upper part of the hot water storage tank 1 is increased. The opening degree of the circulation water proportional valve 65 is adjusted based on the detection information of the hot water storage thermistor 66 so that the temperature becomes the hot water storage set temperature.

【００５５】このようにして、貯湯タンク１内の湯水が
温度成層を形成しながら貯湯され、貯湯タンク１の貯湯
量が貯湯リモコン９２などにより設定された目標貯湯量
になると、設定時間貯湯タンク１への貯湯を継続したの
ち、エンジンヒートポンプ式冷暖房装置Ｂの運転を停止
させるとともに、循環ポンプＰ１の作動を停止させかつ
開弁している開閉弁を閉弁させて湯水循環手段Ｅの運転
を停止させる。ちなみに、目標貯湯量は、「少」、
「中」、「満」のうちのひとつが選択でき、例えば、目
標貯湯量として「中」が選択されているときには、中部
サーミスタＳ３が貯湯設定温度よりも設定温度だけ低い
温度を検出すると、貯湯タンク１の貯湯量が目標貯湯量
になっていると検出するようにしている。In this way, the hot water in the hot water storage tank 1 is stored while forming a temperature stratification, and when the hot water storage amount of the hot water storage tank 1 reaches the target hot water storage amount set by the hot water storage remote controller 92 or the like, the set time hot water storage tank 1 After the hot water storage is continued, the operation of the engine heat pump type cooling / heating device B is stopped, the operation of the circulation pump P1 is stopped, and the open / close valve is closed to stop the operation of the water / water circulation means E. Let it. By the way, the target hot water storage is "small",
One of "medium" and "full" can be selected. For example, when "medium" is selected as the target hot water storage amount, when the central thermistor S3 detects a temperature lower than the set hot water storage temperature by the set temperature, the hot water storage It is configured to detect that the hot water storage amount of the tank 1 has reached the target hot water storage amount.

【００５６】前記貯湯運転における補助加熱貯湯運転に
ついて具体的に説明すると、まず、湯水循環手段Ｅを補
助加熱貯湯初期運転状態に切り換えて、貯湯タンク１の
底部から取り出した湯水を補助加熱器３５にて加熱した
のち、その温水を貯湯タンク１の底部に戻す補助加熱貯
湯初期運転と、湯水循環手段Ｅを補助加熱貯湯運転状態
に切り換えて、貯湯タンク１の底部から取り出した湯水
を補助加熱器３５にて加熱したのち、その温水を貯湯タ
ンク１の上部に供給する補助加熱貯湯運転とに切り換え
て貯湯される。The auxiliary heating hot water storage operation in the hot water storage operation will be specifically described. First, the hot water circulation means E is switched to the auxiliary heating hot water storage initial operation state, and the hot water taken out from the bottom of the hot water storage tank 1 is supplied to the auxiliary heater 35. After the heating, the hot water is returned to the bottom of the hot water storage tank 1, and the hot water storage means is switched to the auxiliary heating hot water storage operation state by returning the hot water to the bottom of the hot water storage tank 1. After that, the hot water is stored by switching to an auxiliary heating hot water storage operation for supplying the hot water to the upper part of the hot water storage tank 1.

【００５７】つまり、貯湯ユニット制御部Ｃは、貯湯用
目標温度Ｔｂよりも８℃高い温度を越える沸き上げ温度
Ｔａ、又は、貯湯用目標温度Ｔｂよりも１５℃低い温度
を越える沸き上げ温度Ｔａが貯湯サーミスタ６６により
１秒間継続して検出されるまで、補助加熱貯湯初期運転
状態にて湯水を１リットル/minの循環量Ｑで循環させる
補助加熱貯湯初期運転を行い、貯湯用目標温度Ｔｂより
も８℃高い温度を越える沸き上げ温度Ｔａ、又は、貯湯
用目標温度Ｔｂよりも１５℃低い温度を越える沸き上げ
温度Ｔａが１秒間継続して検出されると、補助加熱貯湯
運転に切り換えて、沸き上げ温度Ｔａが貯湯用目標温度
Ｔｂになるように循環量Ｑを制御するように構成されて
いる。That is, the hot water storage unit controller C determines that the boiling temperature Ta exceeds the temperature 8 ° C. higher than the target temperature Tb for hot water storage or the boiling temperature Ta exceeds the temperature 15 ° C. lower than the target temperature Tb for hot water storage. Until continuously detected by the hot water storage thermistor 66 for one second, the auxiliary heating hot water storage initial operation in which the hot water is circulated at the circulation rate Q of 1 liter / min in the auxiliary heating hot water storage initial operation state is performed. When the boiling temperature Ta exceeding 8 ° C. higher or the boiling temperature Ta exceeding 15 ° C. lower than the hot water storage target temperature Tb is continuously detected for 1 second, the operation is switched to the auxiliary heating hot water storage operation and the boiling is performed. The circulation amount Q is controlled so that the raising temperature Ta becomes the hot water storage target temperature Tb.

【００５８】このようにして、貯湯タンク１内の湯水が
温度成層を形成しながら貯湯され、貯湯タンク１の貯湯
量が貯湯リモコン９２などにより設定された目標貯湯量
になると、設定時間貯湯タンク１への貯湯を継続したの
ち、補助加熱器３５の運転を停止させるとともに、循環
ポンプＰ１の作動を停止させかつ開弁している開閉弁を
閉弁させて湯水循環手段Ｅの運転を停止させる。In this way, the hot water in the hot water storage tank 1 is stored while forming a temperature stratification, and when the hot water storage amount of the hot water storage tank 1 reaches the target hot water storage amount set by the hot water storage remote controller 92 or the like, the hot water storage tank 1 for the set time is stored. Then, the operation of the auxiliary heater 35 is stopped, the operation of the circulation pump P1 is stopped, and the open / close valve is closed to stop the operation of the hot water circulation means E.

【００５９】前記放熱運転は、追焚き要求のみの要求が
あると、追焚き運転を実行し、暖房要求のみの要求があ
ると、暖房運転を実行し、追焚き要求および暖房要求の
両要求があると、追焚き・暖房同時運転を実行するよう
に構成されている。In the heat dissipation operation, when there is a request for only the reheating request, the reheating operation is executed, and when there is a request for only the heating request, the heating operation is executed, and both the reheating request and the heating request are performed. When there is, it is configured to execute the additional heating / heating simultaneous operation.

【００６０】前記放熱運転における追焚き運転について
具体的に説明すると、湯水循環手段Ｅを追焚き運転状態
に切り換え、かつ、貯湯サーミスタ６６による検出温度
が追焚き用設定温度になるようにファン３７の回転速度
およびガス比例弁４０の開度を調整するとともに、風呂
ポンプＰ３を作動させて浴槽内の湯水を風呂戻り路１８
および風呂往き路１９を通して循環させる。そして、風
呂用熱交換部４３にて浴槽内の湯水を加熱して追焚き
し、風呂戻りサーミスタ５７の検出温度が追焚き用設定
温度以上になると、風呂ポンプＰ３の作動を停止すると
ともに、補助加熱器３５の運転および湯水循環手段Ｅの
運転を停止させる。More specifically, the reheating operation in the heat radiation operation will be described. The hot water circulation means E is switched to the reheating operation state, and the fan 37 is set so that the temperature detected by the hot water storage thermistor 66 becomes the set temperature for reheating. The rotation speed and the degree of opening of the gas proportional valve 40 are adjusted, and the bath pump P3 is operated to supply hot and cold water in the bathtub to the bath return path 18.
And circulate through the bath outflow 19. When the temperature of the bath return thermistor 57 becomes equal to or higher than the set temperature for additional heating, the operation of the bath pump P3 is stopped and the auxiliary heat is applied. The operation of the heater 35 and the operation of the hot and cold water circulation means E are stopped.

【００６１】前記放熱運転における暖房運転について具
体的に説明すると、湯水循環手段Ｅを暖房運転状態に切
り換え、かつ、貯湯サーミスタ６６による検出温度が暖
房用設定温度になるようにファン３７の回転速度および
ガス比例弁４０の開度を調整するとともに、暖房ポンプ
Ｐ２を作動させて暖房端末からの熱媒を暖房戻り路４６
および暖房往き路４７を通して循環させ、暖房用熱交換
部４２にて熱媒を加熱して暖房端末に供給するようにし
ている。More specifically, the heating operation in the heat dissipation operation will be described. The hot water circulation means E is switched to the heating operation state, and the rotation speed of the fan 37 and the rotation speed of the fan 37 are set so that the temperature detected by the hot water storage thermistor 66 becomes the heating set temperature. The opening degree of the gas proportional valve 40 is adjusted, and the heating pump P2 is operated to transfer the heat medium from the heating terminal to the heating return path 46.
Further, the heat medium is circulated through the heating outflow path 47, and the heating medium is heated by the heating heat exchange section 42 and supplied to the heating terminal.

【００６２】前記放熱運転における追焚き・暖房同時運
転について具体的に説明すると、湯水循環手段Ｅを追焚
き・暖房同時運転状態に切り換え、かつ、貯湯サーミス
タ６６による検出温度が追焚き・暖房同時用設定温度に
なるようにファン３７の回転速度およびガス比例弁４０
の開度を調整するとともに、風呂ポンプＰ３を作動させ
て浴槽内の湯水を風呂戻り路１８および風呂往き路１９
を通して循環させ、かつ、暖房ポンプＰ２を作動させて
暖房端末からの熱媒を暖房戻り路４６および暖房往き路
４７を通して循環させる。そして、浴槽の湯水を追焚き
するとともに、暖房端末に暖房用熱交換部４２にて加熱
された熱媒を供給するようにしている。The simultaneous operation of additional heating and heating in the heat radiation operation will be specifically described. The hot water circulation means E is switched to the simultaneous operation of additional heating and heating, and the temperature detected by the hot water storage thermistor 66 is used for simultaneous additional heating and heating. The rotation speed of the fan 37 and the gas proportional valve 40
The opening of the bath is adjusted, and the bath pump P3 is operated to supply the hot water in the bathtub to the bath return path 18 and the bath going path 19.
And the heating pump P2 is operated to circulate the heat medium from the heating terminal through the heating return path 46 and the heating going path 47. Then, the hot water in the bathtub is additionally heated, and the heat medium heated by the heating heat exchange unit 42 is supplied to the heating terminal.

【００６３】前記給湯優先運転は、貯湯タンク１の貯湯
量が最低確保量未満のときに、給湯栓などに給湯すると
きに実行され、湯水循環手段Ｅを補助加熱貯湯運転状態
に切り換え、補助加熱器３５にて加熱された湯水を上部
接続路２５から給湯路６に給湯しながら、給湯目標温
度、貯湯出口サーミスタ１３および給水サーミスタ９の
検出情報に基づいて、給湯する湯水の温度が給湯目標温
度になるようにミキシングバルブ８の開度を調整すると
ともに、ミキシングサーミスタ１４の検出情報に基づい
て、その検出温度と給湯目標温度との偏差に基づいてミ
キシングバルブ８の開度を微調整することにより、給湯
目標温度の湯水を給湯するようにしている。The hot water supply priority operation is executed when hot water is supplied to a hot water tap or the like when the hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, and the hot water circulation means E is switched to the auxiliary heating hot water storage operation state, and the auxiliary heating operation is performed. While the hot water heated by the water heater 35 is supplied from the upper connection path 25 to the hot water supply path 6, the temperature of the hot water to be supplied is determined based on the detection information of the hot water supply outlet thermistor 13 and the water supply thermistor 9. And the fine adjustment of the opening of the mixing valve 8 based on the detection information of the mixing thermistor 14 and the deviation between the detected temperature and the hot water supply target temperature. The hot water is supplied at the hot water supply target temperature.

【００６４】ちなみに、浴槽に湯張りを行うときには、
給湯優先運転と同様に、貯湯タンク１の貯湯量が最低確
保量未満のときに、給湯栓などに給湯するときに実行さ
れ、給湯目標温度、貯湯出口サーミスタ１３および給水
サーミスタ９の検出情報に基づいて、給湯する湯水の温
度が給湯目標温度になるようにミキシングバルブ８の開
度を調整するとともに、ミキシングサーミスタ１４の検
出情報に基づいて、その検出温度と給湯目標温度との偏
差に基づいてミキシングバルブ８の開度を微調整すると
ともに、湯張り電磁弁２２を開弁させ、ミキシングバブ
ル８にて給湯目標温度に調整された湯水を風呂戻り路１
８および風呂往き路１９の両路から浴槽に供給し、浴槽
内に湯張り設定量の湯水が供給されると、湯張り電磁弁
２２を閉弁させるようにしている。By the way, when filling the bathtub with hot water,
Similar to the hot water supply priority operation, when the hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, the hot water supply is performed when hot water is supplied to a hot water tap or the like, and based on the hot water supply target temperature, the hot water storage outlet thermistor 13 and the detection information of the water supply thermistor 9. The opening of the mixing valve 8 is adjusted so that the temperature of the hot water becomes the hot water supply target temperature, and the mixing is performed based on the detection information of the mixing thermistor 14 and the deviation between the detected temperature and the hot water supply target temperature. The opening degree of the valve 8 is finely adjusted, the hot water filling electromagnetic valve 22 is opened, and the hot water adjusted to the hot water supply target temperature by the mixing bubble 8 is returned to the bath return path 1.
The bath water is supplied to the bath tub from both of the bath 8 and the bath going path 19, and when a set amount of hot water is supplied into the bath tub, the hot water electromagnetic valve 22 is closed.

【００６５】前記貯湯ユニットＡの制御動作について、
図４〜６のフローチャートに基づいて説明する。前記貯
湯ユニットＡは、図４のフローチャートに示すように、
貯湯タンク１の貯湯量が最低確保量未満であって、か
つ、給湯栓が開操作されて給湯中であると、給湯優先運
転を実行し、貯湯タンク１の貯湯量が最低確保量以上で
あるか、給湯中でなければ、給湯優先運転を実行してい
ると、補助加熱器３５の運転および循環ポンプＰ１の作
動を停止させて給湯優先運転停止処理を実行する。そし
て、暖房要求や追焚き要求などの放熱要求があると、放
熱運転を実行し、貯湯要求があると、貯湯運転を実行す
る。Regarding the control operation of the hot water storage unit A,
A description will be given based on the flowcharts of FIGS. The hot water storage unit A, as shown in the flowchart of FIG.
If the amount of hot water stored in the hot water storage tank 1 is less than the minimum secured amount and the hot water tap is being opened and hot water is being supplied, the hot water supply priority operation is performed, and the amount of hot water stored in the hot water storage tank 1 is equal to or greater than the minimum secured amount. Or, when the hot water supply is not being performed, if the hot water supply priority operation is being performed, the operation of the auxiliary heater 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing. Then, when there is a heat radiation request such as a heating request or a reheating request, the heat radiation operation is executed, and when there is a hot water storage request, the hot water storage operation is executed.

【００６６】前記放熱運転の制御動作について、図５の
フローチャートに基づいて説明を加えると、貯湯タンク
１の貯湯量が最低確保量未満であって、かつ、給湯栓が
開操作されて給湯中であると、給湯優先運転を実行す
る。貯湯タンク１の貯湯量が最低確保量以上であるか、
給湯中でなければ、給湯優先運転を実行していると、補
助加熱器３５の運転および循環ポンプＰ１の作動を停止
させて給湯優先運転停止処理を実行する。The control operation of the heat dissipation operation will be described with reference to the flowchart of FIG. 5. The hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, and the hot water tap is opened to supply hot water. If there is, hot water supply priority operation is executed. Whether the amount of hot water stored in hot water storage tank 1 is greater than the minimum
If the hot water supply priority operation is being executed unless the hot water supply is being performed, the operation of the auxiliary heater 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing.

【００６７】そして、追焚き要求がありかつ暖房要求が
ないときには、追焚き運転を実行し、追焚き要求および
暖房要求の両要求があるときには、追焚き・暖房同時運
転を実行し、追焚き要求がなくかつ暖房要求があるとき
には、暖房運転を実行する。このようにして、追焚き要
求および暖房要求のいずれかまたは両方が要求されてい
るかによって、その要求に応えるべく、追焚き運転、暖
房運転、追焚き・暖房同時運転の夫々の運転を実行し、
追焚き要求および暖房要求のいずれかまたは両方が満た
されて要求が完了すると、湯水循環手段Ｅおよび補助加
熱器３５の運転を停止させる放熱停止処理を実行する。When there is a reheating request and no heating request, the reheating operation is executed. When both the reheating request and the heating request are made, the reheating and heating simultaneous operation is executed and the reheating request is executed. If there is no heating request and there is a heating request, the heating operation is executed. In this manner, depending on whether one or both of the reheating request and the heating request are requested, in order to respond to the request, the reheating operation, the heating operation, and the respective operations of the reheating and heating simultaneous operation are performed,
When either or both of the additional heating request and the heating request are satisfied and the request is completed, a heat radiation stopping process for stopping the operation of the hot and cold water circulation means E and the auxiliary heater 35 is executed.

【００６８】前記貯湯運転の制御動作について、図６の
フローチャートに基づいて説明を加えると、貯湯タンク
１の貯湯量が最低確保量未満であって、かつ、給湯栓が
開操作されて給湯中であると、給湯優先運転を実行す
る。貯湯タンク１の貯湯量が最低確保量以上であるか、
給湯中でなければ、給湯優先運転を実行していると、補
助加熱器３５の運転および循環ポンプＰ１の作動を停止
させて給湯優先運転停止処理を実行する。そして、追焚
き要求または暖房要求のいずれかの放熱要求があると、
放熱運転を実行し、放熱要求がないときは貯湯運転制御
を実行して、貯湯タンク１の貯湯量が目標貯湯量になる
と、設定時間貯湯タンク１への貯湯を継続したのち、エ
ンジンヒートポンプ式冷暖房装置Ｂまたは加熱部４の運
転を停止させるとともに、循環ポンプＰ１の作動を停止
させかつ開弁している開閉弁を閉弁させて湯水循環手段
Ｅの運転を停止させる貯湯運転停止処理を実行する。The control operation of the hot water storage operation will be described with reference to the flowchart of FIG. 6. The hot water storage amount of the hot water storage tank 1 is less than the minimum secured amount, and the hot water tap is opened to supply hot water. If there is, the hot water supply priority operation is executed. Whether the amount of hot water stored in hot water storage tank 1 is greater than the minimum
If the hot water supply priority operation is being executed unless the hot water supply is being performed, the operation of the auxiliary heater 35 and the operation of the circulation pump P1 are stopped to execute the hot water supply priority operation stop processing. And if there is a heat release request of either a reheating request or a heating request,
The heat dissipation operation is performed, and when there is no heat dissipation request, the hot water storage operation control is performed. When the hot water storage amount of the hot water storage tank 1 reaches the target hot water storage amount, the hot water storage in the hot water storage tank 1 is continued for a set time, and then the engine heat pump cooling and heating is performed. The operation of the apparatus B or the heating unit 4 is stopped, the operation of the circulation pump P1 is stopped, and the open / close valve is closed to stop the operation of the hot water circulation means E, thereby executing a hot water storage operation stop process. .

【００６９】前記貯湯運転制御について詳細に説明す
る。前記貯湯運転制御は、貯湯リモコン９２にて風呂予
約設定を行った場合などに、貯湯用目標温度Ｔｂで、か
つ、目標貯湯量Ｒａの湯水を貯湯タンク１に貯湯するた
めに、現在の貯湯量Ｒが目標貯湯量Ｒａに対してかなり
少ないと判定したときに、ヒートポンプ式加熱器３３や
補助加熱器３５を使用して行われる。The hot water storage operation control will be described in detail. The hot water storage operation control is performed in order to store hot water of the target hot water storage amount Ra in the hot water storage tank 1 at the target hot water storage temperature Tb when the bath reservation setting is performed by the hot water storage remote controller 92 or the like. When it is determined that R is considerably smaller than the target hot water storage amount Ra, the process is performed using the heat pump heater 33 and the auxiliary heater 35.

【００７０】つまり、貯湯ユニット制御部Ｃが、ヒート
ポンプ式加熱器３３による湯水の沸き上げ温度Ｔａを貯
湯目標温度範囲の温度に維持すべく、湯水循環手段Ｅに
よる湯水の循環量Ｑを増減制御する循環制御手段として
機能し、貯湯運転が指令されるに伴って、図７に示すよ
うに、湯水循環手段Ｅを、貯湯タンク１の底部から取り
出した湯水をヒートポンプ式加熱器３３にて加熱したの
ち、その温水を貯湯タンク１の底部に戻す形態のＨＰ貯
湯初期運転状態で湯水を循環させるＨＰ貯湯初期Ａ運転
モードとＨＰ貯湯初期Ｂ運転モードとに切り換えて、そ
の運転を制御したあと、貯湯タンク１内に湯水が温度成
層を形成して貯湯されるように、貯湯タンク１の底部か
ら取り出した湯水をヒートポンプ式加熱器３３にて加熱
したのち、その温水を貯湯タンク１の上部に供給する形
態のＨＰ貯湯運転状態で湯水を循環させるＨＰ貯湯Ａ運
転モードとＨＰ貯湯Ｂ運転モードとに切り換えて、その
運転を制御する。That is, the hot water storage unit controller C controls the amount Q of hot water circulated by the hot water circulating means E to increase or decrease the boiling temperature Ta of the hot water by the heat pump heater 33 to a temperature within the target temperature range of the hot water storage. It functions as circulation control means, and after the hot water storage operation is commanded, the hot water circulation means E heats the hot water taken out from the bottom of the hot water storage tank 1 with the heat pump heater 33 as shown in FIG. In the HP hot water storage initial operation state in which the hot water is returned to the bottom of the hot water storage tank 1, the operation is switched between the HP hot water storage initial A operation mode in which hot water is circulated and the HP hot water storage initial B operation mode, and the operation is controlled. The hot and cold water taken out from the bottom of the hot water storage tank 1 is heated by the heat pump type heater 33 so that the hot and cold water forms a temperature stratification and is stored in the hot water storage tank 1. The switching to the HP hot water storage A operation mode and HP hot water storage B operation mode for circulating hot water in the HP hot water storage operation state of the embodiment supplies the upper part of the hot water storage tank 1 to control its operation.

【００７１】また、ヒートポンプ運転制御手段としての
ヒートポンプ運転制御部Ｄは、貯湯運転が指令されるに
伴って、ヒートポンプ式加熱器３３の冷媒圧縮機７８を
起動させて、ヒートポンプ式加熱器３３に供給される冷
媒圧力が設定目標圧力になるように冷媒圧縮機７８の回
転速度を制御しながら、ヒートポンプ式加熱器３３の加
熱用運転を制御する。Further, the heat pump operation control section D as the heat pump operation control means activates the refrigerant compressor 78 of the heat pump type heater 33 and supplies the same to the heat pump type heater 33 in response to the instruction of the hot water storage operation. The heating operation of the heat pump heater 33 is controlled while controlling the rotation speed of the refrigerant compressor 78 so that the refrigerant pressure to be set becomes the set target pressure.

【００７２】前記ＨＰ貯湯初期Ａ運転モードでは、循環
量Ｑが初期目標流量( ３リットル/min) になるように水
比例バルブ６５の開度を制御し、ＨＰ貯湯初期Ｂ運転モ
ードでは、循環量Ｑがヒートポンプ式加熱器３３の冷媒
圧力に応じて増加するように水比例バルブ６５の開度を
制御する。また、ＨＰ貯湯Ａ運転モードでは、循環量Ｑ
がヒートポンプ式加熱器３３の冷媒圧力に応じて増加す
るように水比例バルブ６５の開度を制御し、ＨＰ貯湯Ｂ
運転モードでは、沸き上げ温度Ｔａが貯湯用目標温度Ｔ
ｂ( 本実施形態では、６０℃又は６７℃のいずれかに設
定されている) になるように水比例バルブ６５の開度を
制御して循環量Ｑを調整し、必要に応じて、補助加熱器
３５にて加熱した湯水を貯湯タンク１の上部に供給する
補助加熱貯湯運転モードに切り換えて貯湯する。In the HP hot water storage initial A operation mode, the opening of the water proportional valve 65 is controlled so that the circulation amount Q becomes the initial target flow rate (3 liters / min). The opening of the water proportional valve 65 is controlled so that Q increases in accordance with the refrigerant pressure of the heat pump heater 33. In the HP hot water storage A operation mode, the circulation amount Q
The opening degree of the water proportional valve 65 is controlled so as to increase in accordance with the refrigerant pressure of the heat pump heater 33,
In the operation mode, the boiling temperature Ta is equal to the target temperature T for hot water storage.
b (in this embodiment, set to either 60 ° C. or 67 ° C.), the circulation amount Q is adjusted by controlling the opening of the water proportional valve 65, and if necessary, the auxiliary heating The mode is switched to an auxiliary heating hot water storage operation mode in which the hot water heated by the heater 35 is supplied to the upper portion of the hot water storage tank 1 to store hot water.

【００７３】以下、貯湯ユニット制御部Ｃによる貯湯運
転制御について、図８〜図２０のフローチャートを参照
しながら詳述する。前記ＨＰ貯湯初期Ａ運転モードにつ
いて説明する。前記ＵＰ貯湯初期Ａ運転モードによる運
転制御では、図８に示すように、タイマ９４をリセット
して、ヒートポンプ運転制御部Ｄにヒートポンプ運転要
求信号を出力し、ヒートポンプ運転制御部Ｄからエンジ
ンヒートポンプ式冷暖房装置Ｂの運転状態を示す運転状
態を示す信号としてのヒートポンプの加熱能力不足を示
す能力不足信号が入力されている場合は、貯湯待機処理
を実行し、能力不足信号が入力されていない場合は、湯
水循環手段ＥをＨＰ貯湯初期運転状態に切り換えて循環
ポンプＰ１を作動させ、循環量Ｑが初期目標流量( ３リ
ットル/min) になるように水比例バルブ６５の開度を制
御して、貯湯タンク１の底部から取り出した湯水を補助
用バイパス路６８と暖房用循環路３ａとを通って貯湯タ
ンク１の底部に戻す形態で湯水を循環させる( ステップ
＃１〜＃４) 。そして、ヒートポンプ運転制御部Ｄから
運転状態を示す信号としてのエンジンヒートポンプ式冷
暖房装置Ｂが運転されていることを示すヒートポンプ運
転信号が、ヒートポンプ運転要求信号を出力してから５
分が経過しても入力されない場合は、貯湯待機処理を実
行し、ヒートポンプ運転信号が入力されると、ＨＰ貯湯
初期Ｂ運転モードによる運転制御を開始する( ステップ
＃５〜＃７) 。Hereinafter, the hot water storage operation control by the hot water storage unit control unit C will be described in detail with reference to the flowcharts of FIGS. The HP hot water storage initial A operation mode will be described. In the operation control in the UP hot-water storage initial A operation mode, as shown in FIG. When a capacity shortage signal indicating a heating capacity shortage of the heat pump as a signal indicating an operation state indicating the operation state of the apparatus B is input, the hot water storage standby process is performed. When the capacity shortage signal is not input, The hot water circulation means E is switched to the HP hot water storage initial operation state to operate the circulation pump P1, and the opening of the water proportional valve 65 is controlled so that the circulation amount Q becomes the initial target flow rate (3 liters / min). The hot and cold water taken out from the bottom of the tank 1 is returned to the bottom of the hot water storage tank 1 through the auxiliary bypass path 68 and the heating circulation path 3a to circulate the hot water. Causes (step # 1 to # 4). Then, the heat pump operation control unit D outputs a heat pump operation signal indicating that the engine heat pump type cooling / heating device B is operating as a signal indicating the operation state, and outputs the heat pump operation request signal.
If the input is not input after the elapse of the minute, the hot water storage standby processing is executed, and when the heat pump operation signal is input, the operation control in the HP hot water storage initial B operation mode is started (steps # 5 to # 7).

【００７４】前記貯湯待機処理は、図９に示すように、
循環ポンプＰ１が作動しているときはその作動を停止す
るとともに、ヒートポンプ運転要求信号の出力を停止し
て、タイマ９４をリセットし、タイマ９４の積算時間が
３０分になると、ＨＰ貯湯初期Ａ運転モードによる運転
制御に戻る( ステップ＃１１〜＃１５) 。As shown in FIG. 9, the hot water storage standby process
When the circulation pump P1 is operating, the operation is stopped, the output of the heat pump operation request signal is stopped, and the timer 94 is reset. The operation returns to the mode-based operation control (steps # 11 to # 15).

【００７５】前記ＨＰ貯湯初期Ｂ運転モードについて説
明する。前記ＨＰ貯湯初期Ｂ運転モードによる運転制御
では、室外機７２からヒートポンプ式加熱器３３に加熱
用冷媒が供給されており、図１０に示すように、タイマ
９４をリセットして、ＨＰ貯湯初期運転状態で循環量Ｑ
が運転開始用設定量としての初期目標流量( １リットル
/min) になるように水比例バルブ６５の開度を制御する
( ステップ＃２１，＃２２) 。The HP hot water storage initial B operation mode will be described. In the operation control in the HP hot water storage initial B operation mode, the heating refrigerant is supplied from the outdoor unit 72 to the heat pump type heater 33, and as shown in FIG. And circulation amount Q
Is the initial target flow rate (1 liter)
/ min) to control the opening of the water proportional valve 65
(Steps # 21, # 22).

【００７６】そして、ヒートポンプ運転制御部Ｄから運
転状態を示す信号としての冷却水温度サーミスタ９５に
よる検出温度が６０℃以上であることを示すエンジン６
０℃信号が入力されていないときは、ＨＰ貯湯初期Ａ運
転モードによる運転制御に戻り、エンジン６０℃信号が
入力されていると、貯湯用目標温度Ｔｂが６０℃の場合
は上限循環量Ｑmax を３リットル/minに設定し、貯湯用
目標温度Ｔｂが６７℃の場合は上限循環量Ｑmax を２リ
ットル/minに設定して、高圧検出手段８８で検出した冷
媒圧力が２段階に設定した循環量増大制御用圧力のいず
れかになると、その２段階の循環量増大制御用圧力に対
応させて設定してある２段階の設定増大量を循環量増大
制御用圧力に応じて選択して、湯水の循環量Ｑを設定増
大量分増加させて設定時間待機する循環量増大制御を繰
り返し実行する( ステップ＃２３〜＃２７) 。Then, the engine 6 indicating that the temperature detected by the cooling water temperature thermistor 95 as a signal indicating the operation state from the heat pump operation control section D is not lower than 60 ° C.
When the 0 ° C. signal is not input, the operation returns to the operation control in the HP hot water storage initial A operation mode. When the engine 60 ° C. signal is input, the upper limit circulation amount Qmax is set when the hot water storage target temperature Tb is 60 ° C. When the target temperature for hot water storage Tb is 67 ° C., the upper limit circulation amount Qmax is set to 2 liter / min, and the refrigerant pressure detected by the high pressure detecting means 88 is set to two stages. When the pressure reaches one of the pressures for increase control, a two-stage set increase amount set corresponding to the two-stage circulation amount increase control pressure is selected according to the circulation amount increase control pressure, and The circulation amount increase control for increasing the circulation amount Q by the set increase amount and waiting for the set time is repeatedly executed (steps # 23 to # 27).

【００７７】前記循環量増大制御について説明する。前
記循環量増大制御では、図１１に示すように、循環量セ
ンサ６２で検出した循環量Ｑが上限循環量Ｑmax 以上の
ときは、循環量Ｑを現状に維持し、循環量Ｑが上限循環
量Ｑmax 未満で、ヒートポンプ運転制御部Ｄから運転状
態を示す信号としての、高圧検出手段８８で検出した冷
媒圧力が循環量増大制御用圧力の一つである２０kgf/cm
²(約１．９６ＭPa) であることを示す冷媒２０kgf/cm²
信号のみが入力されていると、その循環量増大制御用圧
力に対応させて設定してある設定増大量である０．１リ
ットル/minを選択して、循環量Ｑをその設定増大量増加
させ、高圧検出手段８８で検出した冷媒圧力が循環量増
大制御用圧力の一つである２２kgf/cm²(約２．１６ＭP
a) であることを示す冷媒２２kgf/cm²信号が入力され
ていると、その循環量増大制御用圧力に対応させて設定
してある設定増大量である０．２リットル/minを選択し
て、循環量Ｑをその設定増大量増加させる(ステップ＃
４１〜＃４５) 。そして、上記循環量増大制御を、ヒー
トポンプ運転制御部Ｄから能力不足信号が入力されてい
ない状態で、貯湯用目標温度Ｔｂよりも２０℃低い温度
を越える沸き上げ温度Ｔａが貯湯サーミスタ６６により
５秒間継続して検出されるまで、１５秒の演算周期で実
行し、能力不足信号が入力されると貯湯待機処理を実行
する( ステップ＃２８〜＃３４) 。The circulating amount increase control will be described. In the circulation amount increase control, as shown in FIG. 11, when the circulation amount Q detected by the circulation amount sensor 62 is equal to or larger than the upper limit circulation amount Qmax, the circulation amount Q is maintained at the current state, and the circulation amount Q is set to the upper limit circulation amount. The refrigerant pressure detected by the high pressure detecting means 88 as a signal indicating the operation state from the heat pump operation control section D when the refrigerant pressure is less than Qmax is 20 kgf / cm, which is one of the circulation amount increase control pressures.
² (approximately 1.96 MPa) refrigerant 20 kgf / cm ²
When only the signal is input, the circulating amount Q is increased by the set increase amount by selecting the set increase amount of 0.1 liter / min which is set corresponding to the circulating amount increase control pressure. The refrigerant pressure detected by the high pressure detecting means 88 is one of the pressures for controlling the increase in the circulation amount, which is 22 kgf / cm ² (about 2.16 MPP).
a) When a refrigerant 22 kgf / cm ² signal indicating that is input is selected, a set increase amount of 0.2 liter / min which is set corresponding to the circulation amount increase control pressure is selected. , The circulation amount Q is increased by the set amount (step #
41 to # 45). The circulation amount increase control is performed for 5 seconds by the hot water storage thermistor 66 when the boiling temperature Ta exceeds 20 ° C. lower than the hot water storage target temperature Tb in a state where the capacity shortage signal is not input from the heat pump operation control unit D. Until the detection is continued, the process is executed at a calculation cycle of 15 seconds, and when the insufficient capacity signal is input, the hot water storage standby process is executed (steps # 28 to # 34).

【００７８】また、上記の循環量増大制御を繰り返す都
度、沸き上げ温度Ｔａが貯湯用目標温度Ｔｂよりも４℃
低い温度未満か否かを判定し、貯湯用目標温度Ｔｂより
も４℃低い温度未満であれば、貯湯用目標温度Ｔｂが６
０℃の場合は、ＨＰ貯湯初期Ｂ運転モードの開始から１
０分が経過すると貯湯待機処理を実行し、貯湯用目標温
度Ｔｂが６７℃の場合は、ＨＰ貯湯初期Ｂ運転モードの
開始から１５分が経過すると貯湯待機処理を実行する(
ステップ＃３０〜＃３４) 。そして、貯湯用目標温度Ｔ
ｂよりも２０℃低い温度を越える沸き上げ温度Ｔａが貯
湯サーミスタ６６により５秒間継続して検出されると、
ＨＰ貯湯Ａ運転モードによる運転制御を開始する( ステ
ップ＃２９) 。Each time the above-described circulation amount increase control is repeated, the boiling temperature Ta is set at 4 ° C. lower than the hot water storage target temperature Tb.
It is determined whether the temperature is lower than the low temperature. If the temperature is lower than the temperature 4 ° C. lower than the target temperature Tb for hot water storage, the target temperature Tb for hot water storage is 6
In the case of 0 ° C., 1 from the start of the HP hot water storage initial B operation mode.
When 0 minutes have elapsed, the hot-water storage standby process is executed. When the hot-water storage target temperature Tb is 67 ° C., the hot-water storage standby process is executed after 15 minutes have elapsed from the start of the HP hot-water storage initial B operation mode (
Steps # 30 to # 34). And the target temperature T for hot water storage
When the boiling temperature Ta exceeding 20 ° C. lower than b is detected by the hot water storage thermistor 66 continuously for 5 seconds,
The operation control in the HP hot water storage A operation mode is started (step # 29).

【００７９】前記ＨＰ貯湯Ａ運転モードについて説明す
る。前記ＨＰ貯湯Ａ運転モードによる運転制御では、図
１２に示すように、タイマ９４をリセットし、貯湯タン
ク１下部の湯水の温度が上がり過ぎて、ヒートポンプの
加熱能力が低下しないように、湯水循環手段ＥをＨＰ貯
湯運転状態に切り換えて、貯湯タンク１の底部から取り
出した湯水をヒートポンプ式加熱器３３にて加熱したの
ち、その温水を貯湯タンク１の上部に供給する形態で湯
水を循環させ、貯湯用目標温度Ｔｂよりも４．５℃低い
温度を越える沸き上げ温度Ｔａが貯湯サーミスタ６６に
より５秒間継続して検出されるまで、前述の循環量増大
制御を繰り返し実行する( ステップ＃５１〜＃５６) 。
但し、このＨＰ貯湯Ａ運転モードでの運転中に貯湯用目
標温度Ｔｂよりも２３℃低い温度以下の沸き上げ温度Ｔ
ａが検出されると、貯湯禁止運転モードによる運転制御
を開始し、例えば空調暖房負荷が大きくて、能力不足信
号が入力されると貯湯待機処理を実行する。そして、貯
湯用目標温度Ｔｂよりも４．５℃低い温度を越える沸き
上げ温度Ｔａが貯湯サーミスタ６６により５秒間継続し
て検出されると、ＨＰ貯湯Ｂ運転モードによる運転制御
を開始する。The HP hot water storage A operation mode will be described. In the operation control in the HP hot water storage A operation mode, as shown in FIG. 12, the timer 94 is reset, and the hot water circulation means is controlled so that the temperature of the hot water in the lower portion of the hot water storage tank 1 does not rise excessively and the heating capacity of the heat pump does not decrease. E is switched to the HP hot water storage operation state, the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heat pump type heater 33, and then the hot water is circulated in the form of supplying the hot water to the upper part of the hot water storage tank 1 so that the hot water is circulated. The above-described circulation amount increase control is repeatedly executed until the boiling temperature Ta exceeding 4.5 ° C. lower than the target temperature Tb is continuously detected by the hot water storage thermistor 66 for 5 seconds (Steps # 51 to # 56). ).
However, during the operation in the HP hot-water storage A operation mode, the boiling temperature T that is 23 ° C. or less lower than the hot-water storage target temperature Tb.
When a is detected, operation control in the hot-water storage prohibition operation mode is started. For example, when the air-conditioning / heating load is large and a capacity shortage signal is input, hot-water storage standby processing is executed. When the boiling temperature Ta that exceeds the temperature lower by 4.5 ° C. than the hot water storage target temperature Tb is detected by the hot water storage thermistor 66 for 5 seconds, the operation control in the HP hot water storage B operation mode is started.

【００８０】前記貯湯禁止運転モードについて説明す
る。前記貯湯禁止運転モードによる運転制御では、図１
３に示すように、湯水循環手段ＥをＨＰ貯湯初期運転状
態に切り換え、貯湯用目標温度Ｔｂよりも２０℃低い温
度を越える沸き上げ温度Ｔａが検出されるまで後述する
貯湯運転用流量制御を繰り返し実行し、貯湯用目標温度
Ｔｂよりも２０℃低い温度を越える沸き上げ温度Ｔａが
５秒間継続して検出されるとステップ＃５３に戻る( ス
テップ＃６１〜＃６３) 。The hot water storage prohibited operation mode will be described. In the operation control in the hot-water storage prohibited operation mode, FIG.
As shown in FIG. 3, the hot water circulation means E is switched to the HP hot water storage initial operation state, and the hot water storage operation flow control described later is repeated until a boiling temperature Ta exceeding 20 ° C. lower than the hot water storage target temperature Tb is detected. When the boiling temperature Ta exceeding the temperature 20 ° C. lower than the hot water storage target temperature Tb is continuously detected for 5 seconds, the process returns to Step # 53 (Steps # 61 to # 63).

【００８１】前記ＨＰ貯湯Ｂ運転モードについて説明す
る。前記ＨＰ貯湯Ｂ運転モードによる運転制御では、図
１４に示すように、タイマ９４をリセットし、湯水循環
手段ＥをＨＰ貯湯運転状態に切り換え、上限循環量Ｑma
x を１０リットル/minに設定して、貯湯タンク１の上部
に供給する加熱湯水の温度を貯湯用目標温度Ｔｂに維持
するように、水比例バルブ６５のフィードバック制御
で、貯湯サーミスタ６６により検出される沸き上げ温度
Ｔａが貯湯用目標温度Ｔｂになるように、湯水の循環量
Ｑを設定量増減制御して設定時間待機する貯湯運転用流
量制御を１５秒の演算周期で繰り返し実行し、貯湯量検
出手段Ｍにより、目標貯湯量が検出されると、ＨＰ貯湯
Ｂ運転モードによる制御を終了する( ステップ＃７１〜
＃７５) 。The HP hot water storage B operation mode will be described. In the operation control in the HP hot water storage B operation mode, as shown in FIG. 14, the timer 94 is reset, the hot water circulation means E is switched to the HP hot water storage operation state, and the upper limit circulation amount Qma is set.
x is set to 10 liters / min, and detected by the hot water storage thermistor 66 by feedback control of the water proportional valve 65 so that the temperature of the heated hot water supplied to the upper portion of the hot water storage tank 1 is maintained at the target hot water storage temperature Tb. The hot water storage flow rate control is repeated at a calculation cycle of 15 seconds, in which the circulation amount Q of the hot water is increased or decreased by a set amount so that the boiling temperature Ta becomes the hot water storage target temperature Tb, and the set time is waited for a set time. When the target hot water storage amount is detected by the detection means M, the control in the HP hot water storage B operation mode ends (steps # 71 to # 71).
# 75).

【００８２】前記貯湯運転用流量制御について説明す
る。前記貯湯運転用流量制御では、図１５〜図１７に示
すように、貯湯用目標温度Ｔｂよりも２３℃低い温度以
下の沸き上げ温度Ｔａが検出されると、貯湯禁止運転モ
ードによる運転制御が開始され、貯湯用目標温度Ｔｂよ
りも２３℃低い温度以下の沸き上げ温度Ｔａが検出され
いない状態で、循環量Ｑが上限循環量Ｑmaxを越えてい
るときや、循環量Ｑが上限循環量Ｑmax 未満で、かつ、
沸き上げ温度Ｔａが貯湯用目標温度Ｔｂよりも１℃低い
温度以上で貯湯用目標温度Ｔｂよりも１℃高い温度以下
の貯湯目標温度範囲の温度であり、しかも、冷媒２２kg
f/cm²信号が入力されていなかったり、冷媒２２kgf/cm
²信号が入力されていて、冷媒圧力が現状維持判別用圧
力としての２２kgf/cm²(( 約２．１６ＭPa) 以上であっ
ても、最大回転信号が入力されていてヒートポンプ式加
熱器３３に運転余力が無いときには、循環量Ｑを現状に
維持し、最大回転信号が入力されていなくて冷媒圧縮機
７８の運転状態が最大出力運転状態でないとき、つま
り、ヒートポンプ式加熱器３３に運転余力が有るときに
は、循環量Ｑを０．１リットル/minの設定量増大させて
タイマ９４をリセットし、沸き上げ温度Ｔａが貯湯用目
標温度Ｔｂよりも２．５℃低い温度以上のときは、設定
時間としての９０秒間はその増大させた循環量Ｑで循環
させて待機する循環量増大制御を実行する( ステップ＃
８１〜＃９０) 。The flow control for the hot water storage operation will be described. In the hot water storage operation flow control, as shown in FIGS. 15 to 17, when the boiling temperature Ta that is lower than or equal to 23 ° C. lower than the hot water storage target temperature Tb is detected, the operation control in the hot water storage prohibited operation mode starts. When the circulation amount Q exceeds the upper limit circulation amount Qmax, or when the circulation amount Q is less than the upper limit circulation amount Qmax in a state where the boiling temperature Ta lower than the temperature 23 ° C. lower than the hot water storage target temperature Tb is not detected. And
The boiling temperature Ta is a temperature in the hot water storage target temperature range of 1 ° C. or lower than the hot water storage target temperature Tb and 1 ° C. or higher than the hot water storage target temperature Tb, and 22 kg of refrigerant.
f / cm ² signal is not input or refrigerant 22kgf / cm
^{Even if two} signals are input and the refrigerant pressure is 22 kgf / cm ² ((about 2.16 MPa) or more as the current status determination pressure), the maximum rotation signal is input and the heat pump type heater 33 is operated. When there is no remaining power, the circulation amount Q is maintained at the current state, and when the maximum rotation signal is not input and the operation state of the refrigerant compressor 78 is not the maximum output operation state, that is, the heat pump heater 33 has the operation surplus. In some cases, the circulation amount Q is increased by a set amount of 0.1 liter / min to reset the timer 94. When the boiling temperature Ta is equal to or higher than 2.5 ° C. lower than the hot water storage target temperature Tb, the set time is set as the set time. For 90 seconds, the circulating amount increase control is executed to circulate with the increased circulating amount Q and stand by (Step #)
81 to # 90).

【００８３】そして、循環量増大制御を実行した後、沸
き上げ温度Ｔａが貯湯目標温度範囲の温度よりも低く、
冷媒２０kgf/cm²信号が入力されていなかったり、冷媒
２０kgf/cm²信号が入力されていても、ヒートポンプ運
転制御部Ｄから運転状態を示す信号としての、ガスエン
ジン７７の現在の回転数が最大回転数であることを示す
最大回転信号が入力されていれば、つまり、ヒートポン
プ式加熱器３３に運転余力が無いときには、沸き上げ温
度Ｔａが貯湯目標温度範囲の温度になるように、その沸
き上げ温度Ｔａに応じて、循環量Ｑを設定量減少させて
設定時間待機する循環量減少制御を実行する( ステップ
＃９１〜＃９９) 。Then, after executing the circulation amount increase control, the boiling temperature Ta is lower than the temperature in the hot water storage target temperature range,
Even if the refrigerant 20 kgf / cm ² signal is not input or the refrigerant 20 kgf / cm ² signal is input, the current rotation speed of the gas engine 77 as the signal indicating the operation state from the heat pump operation control unit D is the maximum. If the maximum rotation signal indicating the number of rotations is input, that is, if the heat pump type heater 33 has no surplus operating capacity, the boiling temperature is adjusted so that the boiling temperature Ta becomes the temperature of the hot water storage target temperature range. In accordance with the temperature Ta, the circulating amount Q is reduced by a set amount, and a circulating amount reduction control is performed to wait for a set time (steps # 91 to # 99).

【００８４】つまり、沸き上げ温度Ｔａが貯湯用目標温
度Ｔｂよりも２．５℃低い温度以上であれば、循環量Ｑ
を０．１リットル/min減少させ( ステップ＃９４，＃９
５)、沸き上げ温度Ｔａが貯湯用目標温度Ｔｂよりも
２．５℃低い温度を下回り、かつ、貯湯用目標温度Ｔｂ
よりも５℃低い温度以上であれば、循環量Ｑを０．２リ
ットル/min減少させ( ステップ＃９６，＃９７) 、沸き
上げ温度Ｔａが貯湯用目標温度Ｔｂよりも５℃低い温度
を下回り、かつ、貯湯用目標温度Ｔｂよりも６℃低い温
度以上であれば、循環量Ｑを０．３リットル/min減少さ
せ( ステップ＃９８，＃９９) 、沸き上げ温度Ｔａが貯
湯用目標温度Ｔｂよりも６℃低い温度を下回っていれ
ば、貯湯禁止運転モードによる運転制御を実行する。That is, if the boiling temperature Ta is equal to or higher than the temperature 2.5 ° C. lower than the hot water storage target temperature Tb, the circulation amount Q
0.1 liter / min (Steps # 94, # 9)
5) The boiling temperature Ta is lower than the temperature 2.5 ° C. lower than the target temperature Tb for hot water storage, and the target temperature Tb for hot water storage.
If the temperature is 5 ° C. lower than the temperature, the circulation amount Q is reduced by 0.2 liter / min (steps # 96 and # 97), and the boiling temperature Ta falls below the temperature 5 ° C. lower than the hot water storage target temperature Tb. If the temperature is lower than the target temperature Tb by 6 ° C. or more, the circulation amount Q is reduced by 0.3 liter / min (steps # 98 and # 99), and the boiling temperature Ta is set to the target temperature Tb for hot water storage. If the temperature is lower than 6 ° C. lower than the temperature, the operation control in the hot water storage prohibited operation mode is executed.

【００８５】また、沸き上げ温度Ｔａが加熱湯水の温度
が貯湯用目標温度と見なす貯湯用目標温度範囲の温度よ
りも低いときであっても、冷媒２０kgf/cm²信号が入力
されていていて、冷媒圧力が現状維持判別用圧力として
の２０kgf/cm²(１．９６ＭPａ) 以上であり、かつ、最
大回転信号が入力されていなくて、冷媒圧縮機７８の運
転状態が最大出力運転状態でないときは、循環量Ｑを現
状に維持し( ステップ＃９１〜＃９３) 、沸き上げ温度
Ｔａが貯湯目標温度範囲の温度を越えているときは、沸
き上げ温度Ｔａが貯湯用目標温度Ｔｂよりも５℃高い温
度以下であれば、循環量Ｑを０．１リットル/min増加さ
せ、沸き上げ温度Ｔａが貯湯用目標温度Ｔｂよりも５℃
高い温度を越えていれば、循環量Ｑを０．２リットル/m
in増加させ( ステップ＃９１，＃１００〜＃１０２) 。Even when the boiling temperature Ta is lower than the temperature of the hot water storage target temperature range in which the temperature of the heated hot water is regarded as the hot water storage target temperature, the refrigerant 20 kgf / cm ² signal is input. When the refrigerant pressure is equal to or greater than 20 kgf / cm ² (1.96 MPa) as the current status determination pressure, the maximum rotation signal is not input, and the operation state of the refrigerant compressor 78 is not the maximum output operation state. The circulation amount Q is maintained at the current level (steps # 91 to # 93). When the boiling temperature Ta exceeds the temperature of the hot water storage target temperature range, the boiling temperature Ta is 5 ° C. lower than the hot water storage target temperature Tb. If the temperature is lower than the high temperature, the circulation amount Q is increased by 0.1 liter / min, and the boiling temperature Ta is 5 ° C. higher than the target temperature Tb for hot water storage.
If the temperature exceeds the high temperature, the circulation amount Q will be 0.2 liter / m
in is increased (steps # 91, # 100 to # 102).

【００８６】そして、循環量Ｑを０．３リットル/min減
少させたときは、沸き上げ温度Ｔａが貯湯用目標温度Ｔ
ｂよりも４℃低い温度を下回っていると、貯湯用目標温
度Ｔｂが６０℃の場合は、ＨＰ貯湯Ｂ運転モードによる
運転制御の開始から１０分が経過していると貯湯待機処
理を実行し、貯湯用目標温度Ｔｂが６７℃の場合は、Ｈ
Ｐ貯湯Ｂ運転モードによる運転制御の開始から１５分が
経過していると貯湯待機処理を実行し、貯湯待機処理を
実行しないときは、循環量ＱがＨＰ貯湯運転状態で循環
させる湯水の最低流量として設定した設定最低流量であ
る１リットル/minよりも少なく、かつ、最大回転信号が
入力されていてヒートポンプ式加熱器３３に運転余力が
無く、かつ、ＨＰ貯湯Ｂ運転モードによる運転制御の開
始から２分が経過しておれば、補助加熱貯湯運転モード
による運転制御を実行する( ステップ＃１０３〜＃１１
０) 。When the circulation amount Q is reduced by 0.3 liter / min, the boiling temperature Ta becomes the target temperature T for hot water storage.
If the temperature is lower than 4 ° C. lower than b and the hot water storage target temperature Tb is 60 ° C., the hot water storage standby process is executed if 10 minutes have elapsed since the start of the operation control in the HP hot water storage B operation mode. , When the hot water storage target temperature Tb is 67 ° C.,
If 15 minutes have elapsed since the start of the operation control in the P hot-water storage B operation mode, the hot-water storage standby processing is executed, and when the hot-water storage standby processing is not executed, the circulation amount Q is the minimum flow rate of the hot water circulated in the HP hot-water storage operation state Is less than the set minimum flow rate of 1 liter / min, which is set as, and the maximum rotation signal is input, the heat pump type heater 33 has no remaining operating capacity, and from the start of the operation control in the HP hot water storage B operation mode. If two minutes have elapsed, the operation control in the auxiliary heating hot water storage operation mode is executed (Steps # 103 to # 11)
0).

【００８７】前記補助加熱貯湯運転モードによる運転制
御について、図１８〜図２０を参照しながら説明する。
前記補助加熱貯湯運転モードによる運転制御では、図１
８に示すように、ＨＰ貯湯運転モードによる運転制御を
停止するＨＰ貯湯運転モード停止処理を実行し、補助加
熱貯湯初期運転モードによる運転制御を実行した後、補
助加熱貯湯許可運転モードによる運転制御を実行する。The operation control in the auxiliary heating hot water storage operation mode will be described with reference to FIGS.
In the operation control in the auxiliary heating hot water storage operation mode, FIG.
As shown in FIG. 8, after performing the HP hot-water storage operation mode stop process for stopping the operation control in the HP hot-water storage operation mode, performing the operation control in the auxiliary heating hot-water storage initial operation mode, and then performing the operation control in the auxiliary heating hot-water storage permission operation mode. Execute.

【００８８】前記補助加熱貯湯初期運転モードは、図１
９に示すように、タイマ９４をリセットし、湯水循環手
段Ｅを補助加熱貯湯初期運転状態に切り換えて、循環ポ
ンプＰ１を、湯水の循環量Ｑが、入り温度サーミスタ６
１にて検出した入り温度と、貯湯用目標温度Ｔｂと、補
助加熱器３５の定格運転状態における所定の加熱能力と
に基づいて演算した、沸き上げ温度Ｔａが貯湯用目標温
度Ｔｂとなる循環量になるように制御し、給湯用目標温
度Ｔｃよりも８℃高い温度を越える沸き上げ温度Ｔａを
１秒間継続して検出したり、貯湯用目標温度Ｔｂよりも
１５℃低い温度を超える沸き上げ温度Ｔａを１秒間継続
して検出すると、補助加熱貯湯許可運転モードによる運
転制御を実行する( ステップ＃１１１〜＃１１５) 。The auxiliary heating hot water storage initial operation mode is shown in FIG.
As shown in FIG. 9, the timer 94 is reset, the hot and cold water circulating means E is switched to the auxiliary heating hot water storage initial operation state, and the circulation pump P1 is turned on and the hot water circulating amount Q is changed to the incoming temperature thermistor 6.
1. The amount of circulation at which the boiling temperature Ta becomes the hot water storage target temperature Tb, which is calculated based on the incoming temperature detected in step 1, the hot water storage target temperature Tb, and the predetermined heating capacity of the auxiliary heater 35 in the rated operation state. , And continuously detects the boiling temperature Ta exceeding 8 ° C. higher than the hot water supply target temperature Tc for one second, or the boiling temperature exceeding 15 ° C. lower than the hot water storage target temperature Tb. When Ta is continuously detected for one second, the operation control in the auxiliary heating hot water storage permission operation mode is executed (steps # 111 to # 115).

【００８９】前記補助加熱貯湯許可運転モードは、図２
０に示すように、湯水循環手段Ｅを補助加熱貯湯運転状
態に切り換えて、貯湯量が目標貯湯量になるまで、循環
ポンプＰ１を、湯水の循環量Ｑが、入り温度サーミスタ
６１にて検出した入り温度と、貯湯用目標温度Ｔｂと、
補助加熱器３５の定格運転状態における所定の加熱能力
とに基づいて演算した、沸き上げ温度Ｔａが貯湯用目標
温度Ｔｂとなる循環量になるように制御し、給湯用目標
温度Ｔｃよりも３℃高い温度以下の沸き上げ温度Ｔａを
検出したり、貯湯用目標温度Ｔｂよりも２０℃低い温度
未満の沸き上げ温度Ｔａを検出すると、湯水循環手段Ｅ
を補助加熱貯湯初期運転状態に切り換え、補助加熱器３
５による加熱温度として設定した補助加熱器目標温度Ｔ
ｄよりも５℃低い温度未満の沸き上げ温度Ｔａを２分継
続して検出すると循環量を設定量減少させるとともにフ
ラグを立て、更に１分継続すると、補助加熱器３５の異
常と判断して運転を停止する( ステップ＃１２１〜＃１
３３) 。従って、補助加熱貯湯運転モードによる運転制
御では、湯水がヒートポンプ式加熱器３３に代えて補助
加熱器３５にて加熱されて、その補助加熱器３５にて加
熱した温水を貯湯タンク１の上部に供給する形態で湯水
を循環させる補助加熱貯湯運転状態に切り換えられる。The auxiliary heating hot water storage permitting operation mode is shown in FIG.
As shown in FIG. 0, the hot water circulation means E is switched to the auxiliary heating hot water storage operation state, and the circulation pump P1 detects the circulation amount P of the hot water with the incoming temperature thermistor 61 until the hot water storage amount reaches the target hot water storage amount. The entering temperature, the target temperature for hot water storage Tb,
The heating temperature Ta, which is calculated based on the predetermined heating capacity in the rated operation state of the auxiliary heater 35, is controlled so as to be a circulation amount that becomes the hot water storage target temperature Tb, and is 3 ° C. lower than the hot water supply target temperature Tc. When the boiling temperature Ta that is lower than the high temperature is detected, or when the boiling temperature Ta that is lower than the target temperature Tb for hot water storage by 20 ° C. and lower than 20 ° C. is detected, the hot and cold water circulation means E
Is switched to the auxiliary heating hot water storage initial operation state, and the auxiliary heater 3
Auxiliary heater target temperature T set as heating temperature according to 5.
When the boiling temperature Ta lower than 5 ° C. lower than the temperature d is detected for 2 minutes continuously, the circulation amount is reduced and a flag is set. (Steps # 121 to # 1)
33). Accordingly, in the operation control in the auxiliary heating hot water storage operation mode, the hot water is heated by the auxiliary heater 35 instead of the heat pump heater 33, and the hot water heated by the auxiliary heater 35 is supplied to the upper part of the hot water storage tank 1. The operation mode is switched to the auxiliary heating hot water storage operation state in which hot and cold water is circulated.

【００９０】〔第２実施形態〕前記第１実施形態で示し
た補助加熱器３５で加熱する補助加熱貯湯運転モードに
代えて、ヒートポンプ式加熱器３３と補助加熱器３５と
で加熱する補助加熱貯湯運転モードの実施形態を示す
が、第１実施形態と同じ構成部分の説明は省略する。[Second Embodiment] In place of the auxiliary heating hot water storage operation mode in which heating is performed by the auxiliary heater 35 shown in the first embodiment, the auxiliary heating hot water storage heated by the heat pump type heater 33 and the auxiliary heater 35 is used. An embodiment of the operation mode will be described, but the description of the same components as in the first embodiment will be omitted.

【００９１】本実施形態では、補助加熱貯湯運転状態に
おいては、上部開閉弁２８および補助用断続開閉弁６３
を開弁させるとともに、循環ポンプＰ１を作動させ、貯
湯タンク１内に湯水が温度成層を形成して貯湯させるよ
うに、貯湯タンク１の底部から取り出した湯水をヒート
ポンプ式加熱器３３と補助加熱器３５にて加熱したの
ち、その温水を貯湯タンク１の上部に戻すようにしてい
る。また、補助加熱貯湯初期運転状態においては、戻し
開閉弁２９、暖房用開閉弁４４および補助用断続開閉弁
６３を開弁させるとともに、循環ポンプＰ１を作動さ
せ、貯湯タンク１の底部から取り出した湯水をヒートポ
ンプ式加熱器３３と補助加熱器３５にて加熱したのち、
その湯水を貯湯タンク１の底部に戻すようにしている。In this embodiment, in the auxiliary heating hot water storage operation state, the upper opening / closing valve 28 and the auxiliary intermittent opening / closing valve 63
Is opened, the circulation pump P1 is operated, and the hot water taken out from the bottom of the hot water storage tank 1 is heated by the heat pump heater 33 and the auxiliary heater so that the hot water forms a temperature stratification in the hot water storage tank 1 and stores the hot water. After heating at 35, the hot water is returned to the upper part of the hot water storage tank 1. In the auxiliary heating hot water storage initial operation state, the return on-off valve 29, the heating on-off valve 44, and the auxiliary intermittent on-off valve 63 are opened, and the circulating pump P1 is operated to release the hot and cold water taken out from the bottom of the hot water storage tank 1. Is heated by the heat pump type heater 33 and the auxiliary heater 35,
The hot water is returned to the bottom of the hot water storage tank 1.

【００９２】前記補助加熱貯湯運転モードによる運転制
御を、図２１〜図２６を参照しながら説明する。図２１
〜図２３は、第１実施形態で示した貯湯運転用流量制御
と同様であるが、図２３に示すように、補助加熱貯湯運
転モード( ステップ＃１４１) による制御のあと、図１
４に示すＨＰ貯湯Ｂ運転モードに戻って貯湯量が目標貯
湯量になっているかを判定し( ステップ＃７５) 、貯湯
量が目標貯湯量になっていないときには、貯湯運転用流
量制御を繰り返す点で、第１実施形態と異なっている。Operation control in the auxiliary heating hot water storage operation mode will be described with reference to FIGS. FIG.
23 to FIG. 23 are the same as the flow control for hot water storage operation shown in the first embodiment, but after the control in the auxiliary heating hot water storage operation mode (step # 141) as shown in FIG.
Returning to the HP hot water storage B operation mode shown in FIG. 4, it is determined whether or not the hot water storage amount has reached the target hot water storage amount (step # 75). When the hot water storage amount has not reached the target hot water storage amount, the flow of the hot water storage operation flow control is repeated. This is different from the first embodiment.

【００９３】前記補助加熱貯湯運転モードによる運転制
御では、図２４に示すように、補助加熱貯湯追加初期運
転モードによる運転制御を実行したことを示すフラグ１
が立っていると、直ちに補助加熱貯湯追加運転モードに
よる運転制御を実行し、フラグ１が立っていないときに
は、加熱貯湯追加初期運転モードによる運転制御を実行
した後、フラグ１を立てて、補助加熱貯湯追加運転モー
ドによる運転制御を実行する。In the operation control in the auxiliary heating hot water storage operation mode, as shown in FIG. 24, a flag 1 indicating that the operation control in the auxiliary heating hot water storage additional initial operation mode has been executed.
, The operation control in the auxiliary heating hot water storage additional operation mode is immediately performed, and when the flag 1 is not set, the operation control in the heating hot water storage addition initial operation mode is performed, and then the flag 1 is set and the auxiliary heating is performed. The operation control in the hot water storage additional operation mode is executed.

【００９４】前記補助加熱貯湯追加初期運転モードは、
図２５に示すように、タイマ９４をリセットし、湯水循
環手段Ｅを補助加熱貯湯初期運転状態に切り換えて、循
環ポンプＰ１による湯水の循環量Ｑを設定量増大させ、
補助加熱器３５による加熱で沸き上げ温度Ｔａが貯湯用
目標温度Ｔｂとなるように、ファン３７の回転速度およ
びガス比例弁４０の開度を調整する燃焼制御を実行し、
給湯用目標温度Ｔｃよりも８℃高い温度を越える沸き上
げ温度Ｔａを１秒間継続して検出したり、貯湯用目標温
度Ｔｂよりも１５℃低い温度を超える沸き上げ温度Ｔａ
を１秒間継続して検出すると、補助加熱貯湯追加運転モ
ードによる運転制御を実行する( ステップ＃１８１〜＃
１８６) 。The auxiliary heating hot water addition initial operation mode is as follows.
As shown in FIG. 25, the timer 94 is reset, the hot water circulation means E is switched to the auxiliary heating hot water storage initial operation state, and the circulation amount Q of the hot water by the circulation pump P1 is increased by a set amount.
Combustion control for adjusting the rotation speed of the fan 37 and the opening of the gas proportional valve 40 so that the boiling temperature Ta becomes the hot water storage target temperature Tb by heating by the auxiliary heater 35;
The boiling temperature Ta exceeding 8 ° C. higher than the hot water supply target temperature Tc is continuously detected for one second, or the boiling temperature Ta exceeding the temperature 15 ° C. lower than the hot water storage target temperature Tb.
Is continuously detected for one second, the operation control in the auxiliary heating hot water storage additional operation mode is executed (steps # 181 to # 181).
186).

【００９５】前記補助加熱貯湯追加運転モードは、図２
６に示すように、湯水循環手段Ｅを補助加熱貯湯運転状
態に切り換えて、補助加熱器３５による加熱で沸き上げ
温度Ｔａが貯湯用目標温度Ｔｂとなるように、ファン３
７の回転速度およびガス比例弁４０の開度を調整する燃
焼制御を実行して、図１４に示すＨＰ貯湯Ｂ運転モード
に戻り、給湯用目標温度Ｔｃよりも３℃高い温度以下の
沸き上げ温度Ｔａを検出したり、貯湯用目標温度Ｔｂよ
りも２０℃低い温度未満の沸き上げ温度Ｔａを検出する
と、湯水循環手段Ｅを補助加熱貯湯初期運転状態に切り
換え、補助加熱器３５による加熱温度として設定した補
助加熱器目標温度Ｔｄよりも５℃低い温度未満の沸き上
げ温度Ｔａを２分継続して検出すると循環量を設定量減
少させるとともにフラグ２を立て、更に１分継続する
と、補助加熱器３５の異常と判断して運転を停止する(
ステップ＃１９０〜＃２００) 。従って、本実施形態に
よる補助加熱貯湯運転モードによる運転制御では、湯水
がヒートポンプ式加熱器３３と補助加熱器３５とを併用
して加熱されて、その加熱した温水を貯湯タンク１の上
部に供給する形態で湯水を循環させる補助加熱貯湯運転
状態に切り換えられる。The auxiliary heating hot water storage additional operation mode is shown in FIG.
As shown in FIG. 6, the hot water circulation means E is switched to the auxiliary heating hot water storage operation state, and the fan 3 is heated by the auxiliary heater 35 so that the boiling temperature Ta becomes the hot water storage target temperature Tb.
7, the combustion control for adjusting the rotation speed of the gas proportional valve 40 and the opening degree of the gas proportional valve 40 is performed, and the operation returns to the HP hot water storage B operation mode shown in FIG. When Ta is detected or the boiling temperature Ta lower than the temperature 20 ° C. lower than the hot water storage target temperature Tb is detected, the hot water circulation means E is switched to the auxiliary heating hot water storage initial operation state and set as the heating temperature by the auxiliary heater 35. When the boiling temperature Ta lower than the temperature of the auxiliary heater target temperature Td by 5 ° C. is detected for 2 minutes continuously, the circulation amount is reduced and the flag 2 is set. And stop operation (
Steps # 190 to # 200). Therefore, in the operation control in the auxiliary heating hot water storage operation mode according to the present embodiment, the hot water is heated using both the heat pump heater 33 and the auxiliary heater 35 and the heated hot water is supplied to the upper part of the hot water storage tank 1. The mode is switched to the auxiliary heating hot water storage operation state in which hot water is circulated in the form.

【００９６】〔その他の実施形態〕１．上記実施形態では、循環制御手段とヒートポンプ運
転制御手段とが通信しながら、制御を行うように構成さ
れているが、例えば、リモコンの情報が、両制御手段に
並列的に伝えられたり、冷媒の圧力検出情報、圧縮機の
回転数情報等、ヒートポンプ式加熱手段の各種センサの
検出情報が、循環制御手段に直接伝えられる形態で制御
しても良い。２．上記実施形態では、設定時間( １５秒) 間隔おき
に、冷媒圧力の判別が行なわれる形態で、循環量増大制
御が行われるように構成されいるが、例えば、常に冷媒
圧力を監視しておき、冷媒圧力が循環量増大制御用圧力
になると、直ちに循環量増大制御を行い、その後、必ず
設定時間( １５秒) の間は増大制御は行わない形態で実
施しても良い。３．上記実施形態では、水比例バルブの開度を制御して
循環量を調整するように構成したが、循環ポンプの駆動
を制御して循環量を調整しても良い。[Other Embodiments] In the above embodiment, the circulation control unit and the heat pump operation control unit are configured to perform control while communicating with each other.For example, information of a remote controller is transmitted to both control units in parallel, Control may be performed in such a manner that detection information of various sensors of the heat pump type heating means, such as pressure detection information and compressor rotation speed information, is directly transmitted to the circulation control means. 2. In the above-described embodiment, the circulation amount increase control is configured to be performed at intervals of the set time (15 seconds), and the refrigerant pressure is determined. For example, the refrigerant pressure is constantly monitored. When the refrigerant pressure reaches the circulation amount increase control pressure, the circulation amount increase control may be performed immediately, and thereafter, the increase control may not necessarily be performed for the set time (15 seconds). 3. In the above embodiment, the circulation amount is adjusted by controlling the opening of the water proportional valve. However, the circulation amount may be adjusted by controlling the drive of the circulation pump.

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

【図１】貯湯式の給湯熱源装置( 貯湯ユニット) の概略
構成図FIG. 1 is a schematic configuration diagram of a hot water supply heat source device (hot water storage unit) of a hot water storage type.

【図２】貯湯式の給湯熱源装置( エンジンヒートポンプ
式冷暖房装置) の概略構成図FIG. 2 is a schematic configuration diagram of a hot water supply heat source device (engine heat pump type cooling / heating device) of a hot water storage type.

【図３】制御ブロック図FIG. 3 is a control block diagram.

【図４】第１実施形態の制御動作を示すフローチャートFIG. 4 is a flowchart showing a control operation according to the first embodiment;

【図５】第１実施形態の制御動作を示すフローチャートFIG. 5 is a flowchart illustrating a control operation according to the first embodiment;

【図６】第１実施形態の制御動作を示すフローチャートFIG. 6 is a flowchart illustrating a control operation according to the first embodiment;

【図７】第１実施形態の制御動作を示すフローチャートFIG. 7 is a flowchart illustrating a control operation according to the first embodiment;

【図８】第１実施形態の制御動作を示すフローチャートFIG. 8 is a flowchart showing a control operation according to the first embodiment;

【図９】第１実施形態の制御動作を示すフローチャートFIG. 9 is a flowchart showing a control operation according to the first embodiment;

【図１０】第１実施形態の制御動作を示すフローチャー
トFIG. 10 is a flowchart illustrating a control operation according to the first embodiment;

【図１１】第１実施形態の制御動作を示すフローチャー
トFIG. 11 is a flowchart illustrating a control operation according to the first embodiment;

【図１２】第１実施形態の制御動作を示すフローチャー
トFIG. 12 is a flowchart illustrating a control operation according to the first embodiment;

【図１３】第１実施形態の制御動作を示すフローチャー
トFIG. 13 is a flowchart illustrating a control operation according to the first embodiment;

【図１４】第１実施形態の制御動作を示すフローチャー
トFIG. 14 is a flowchart illustrating a control operation according to the first embodiment;

【図１５】第１実施形態の制御動作を示すフローチャー
トFIG. 15 is a flowchart illustrating a control operation according to the first embodiment;

【図１６】第１実施形態の制御動作を示すフローチャー
トFIG. 16 is a flowchart illustrating a control operation according to the first embodiment;

【図１７】第１実施形態の制御動作を示すフローチャー
トFIG. 17 is a flowchart illustrating a control operation according to the first embodiment;

【図１８】第１実施形態の制御動作を示すフローチャー
トFIG. 18 is a flowchart illustrating a control operation according to the first embodiment.

【図１９】第１実施形態の制御動作を示すフローチャー
トFIG. 19 is a flowchart illustrating a control operation according to the first embodiment.

【図２０】第１実施形態の制御動作を示すフローチャー
トFIG. 20 is a flowchart illustrating a control operation according to the first embodiment;

【図２１】第２実施形態の制御動作を示すフローチャー
トFIG. 21 is a flowchart illustrating a control operation according to the second embodiment;

【図２２】第２実施形態の制御動作を示すフローチャー
トFIG. 22 is a flowchart illustrating a control operation according to the second embodiment;

【図２３】第２実施形態の制御動作を示すフローチャー
トFIG. 23 is a flowchart illustrating a control operation according to the second embodiment.

【図２４】第２実施形態の制御動作を示すフローチャー
トFIG. 24 is a flowchart illustrating a control operation according to the second embodiment.

【図２５】第２実施形態の制御動作を示すフローチャー
トFIG. 25 is a flowchart illustrating a control operation according to the second embodiment.

【図２６】第２実施形態の制御動作を示すフローチャー
トFIG. 26 is a flowchart showing a control operation according to the second embodiment;

【符号の説明】[Explanation of symbols]

１貯湯タンク６給湯路３３ヒートポンプ式加熱器３５補助加熱器７８冷媒圧縮機Ｃ循環制御手段Ｄヒートポンプ運転制御手段Ｅ湯水循環手段Ｑ循環量Ｔａ沸き上げ温度 DESCRIPTION OF SYMBOLS 1 Hot water storage tank 6 Hot water supply path 33 Heat pump type heater 35 Auxiliary heater 78 Refrigerant compressor C Circulation control means D Heat pump operation control means E Hot water circulation means Q Circulation amount Ta Boiling temperature

───────────────────────────────────────────────────── フロントページの続き (71)出願人 000221834 東邦瓦斯株式会社愛知県名古屋市熱田区桜田町19番18号 (71)出願人 000196680 西部瓦斯株式会社福岡県福岡市博多区千代１丁目17番１号 (72)発明者福知徹大阪府大阪市此花区北港白津１丁目１番３号大阪瓦斯株式会社内 (72)発明者酒井寿成大阪府大阪市此花区北港白津１丁目１番３号大阪瓦斯株式会社内 (72)発明者橋詰康人大阪府大阪市港区南市岡１丁目１番52号株式会社ハーマン内 (72)発明者河内敏弘大阪府大阪市港区南市岡１丁目１番52号株式会社ハーマン内 (72)発明者藤川泰大阪府大阪市港区南市岡１丁目１番52号株式会社ハーマン内 (72)発明者藤本善夫大阪府大阪市港区南市岡１丁目１番52号株式会社ハーマン内 (72)発明者談議所謙治大阪府大阪市港区南市岡１丁目１番52号株式会社ハーマン内 (72)発明者崎石智也大阪府大阪市港区南市岡１丁目１番52号株式会社ハーマン内 (72)発明者田之頭健一東京都港区海岸１丁目５番20号東京瓦斯株式会社内 (72)発明者山口和也東京都港区海岸１丁目５番20号東京瓦斯株式会社内 (72)発明者肆矢直司愛知県名古屋市熱田区桜田町19番18号東邦瓦斯株式会社内 (72)発明者伊藤実希夫愛知県名古屋市熱田区桜田町19番18号東邦瓦斯株式会社内 (72)発明者川原道憲福岡県福岡市博多区千代１丁目17番１号西部瓦斯株式会社内 (72)発明者名倉勝雪静岡県磐田市新貝2500番地ヤマハ発動機株式会社内Ｆターム(参考） 3L070 BB03 BB09 BB14 BB16 BC03 BC22 ──────────────────────────────────────────────────続き Continued on the front page (71) Applicant 000221834 Toho Gas Co., Ltd. 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi (71) Applicant 000196680 Seibu Gas Co., Ltd. 1-17-1 Chiyo, Hakata-ku, Fukuoka-shi, Fukuoka No. 1 (72) Inventor Toru Fukuchi Osaka Gas Co., Ltd. 1-3-1 Kitako Shiratsu, Konohana-ku, Osaka-shi (72) Inventor Sakunari Sakuni 1-3-1 Kitako-Shiratsu, Konohana-ku, Osaka-shi Osaka Within Gas Co., Ltd. (72) Inventor Yasuhito Hashizume 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Herman Co., Ltd. (72) Inventor Toshihiro Kawachi 1-1-52, Oka, Minami-shi, Minato-ku, Osaka, Osaka Shares (72) Inventor Yasushi Fujikawa 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka-shi Herman Inc. (72) Inventor Yoshio Fujimoto Osaka-shi, Osaka 1-152 Oka, Minami-shi, Minami-ku, Harman Co., Ltd. (72) The inventor's office Kenji 1-1-51, Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka Harman Co., Ltd. (72) Tomoya Sakiishi, Osaka, Osaka 1-152 Oka, Minami-shi, Minato-ku, Tokyo Harman Co., Ltd. (72) Inventor Kenichi Tanoka 1-5-20, Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd. (72) Kazuya Yamaguchi, inventor Kazuya Yamaguchi Tokyo Metropolitan Government (72) Inventor Naoji Shiya 19-18 Sakuradacho, Atsuta-ku, Nagoya-shi, Aichi Prefecture In-House Gas Co., Ltd. (72) Inventor Mikio Ito Nagoya, Aichi Prefecture 19-18, Sakurada-cho, Atsuta-ku, East Japan Gas Co., Ltd. 2500 Shinkai, Ichiyama Yamaha Motor Co., Ltd. F-term (reference) 3L070 BB03 BB09 BB14 BB16 BC03 BC22

Claims

【特許請求の範囲】[Claims]

【請求項１】給湯路が上部に接続された貯湯タンク
と、前記貯湯タンク内に湯水が温度成層を形成して貯湯され
るように、貯湯タンクの底部から取り出した湯水をヒー
トポンプ式加熱器にて加熱したのち、その温水を前記貯
湯タンクの上部に供給する形態の貯湯運転状態で湯水を
循環させる湯水循環手段と、前記ヒートポンプ式加熱器による湯水の沸き上げ温度を
貯湯目標温度範囲の温度に維持すべく、前記湯水循環手
段による湯水の循環量を増減制御する循環制御手段と、前記ヒートポンプ式加熱器における冷媒圧力が設定目標
圧力になるように冷媒圧縮機の回転速度を制御するヒー
トポンプ運転制御手段とが設けられた貯湯式の給湯熱源
装置であって、前記循環制御手段が、前記沸き上げ温度が前記貯湯目標
温度範囲の温度であり、かつ、前記ヒートポンプ式加熱
器に運転余力が有るときには、前記湯水の循環量を設定
量増大させて設定時間待機する循環量増大制御を繰り返
し実行するように構成されている貯湯式の給湯熱源装
置。1. A hot water storage tank having a hot water supply path connected to an upper part thereof, and hot water taken out from a bottom portion of the hot water storage tank so as to form a temperature stratification in the hot water storage tank and store the hot water in a heat pump heater. Hot water, and then circulates the hot water in a hot water storage operation mode in which the hot water is supplied to the upper portion of the hot water storage tank; and the boiling temperature of the hot water by the heat pump heater is set to a temperature in the hot water storage target temperature range. Circulation control means for increasing and decreasing the amount of hot water circulated by the hot water circulation means, and heat pump operation control for controlling the rotation speed of the refrigerant compressor so that the refrigerant pressure in the heat pump heater becomes a set target pressure. Means, and the circulation control means, wherein the boiling temperature is a temperature in the hot water storage target temperature range, One, when the operating margin in the heat-pump heater is present, hot-water supply heat source apparatus storage type that is configured to repeatedly perform a circulating amount increase control to wait the hot water circulation amount is increased set amount setting time.

【請求項２】前記循環制御手段が、前記循環量増大制
御を実行したあと、前記沸き上げ温度が前記貯湯目標温
度範囲の温度よりも低く、かつ、前記ヒートポンプ式加
熱器の運転余力が無いときは、前記沸き上げ温度が前記
貯湯目標温度範囲の温度になるように、前記湯水の循環
量を設定量減少させて設定時間待機する循環量減少制御
を繰り返し実行するように構成されている請求項１記載
の貯湯式の給湯熱源装置。2. After the circulation control means has executed the circulation amount increase control, when the boiling temperature is lower than the temperature in the hot water storage target temperature range and there is no remaining operating capacity of the heat pump heater. Is configured to repeatedly execute a circulation amount reduction control of reducing a circulation amount of the hot water and setting a standby time for a set time so that the boiling temperature becomes the temperature of the hot water storage target temperature range. 2. A hot water supply heat source device according to claim 1.

【請求項３】前記湯水循環手段が、前記貯湯タンク内
に湯水が温度成層を形成して貯湯されるように、貯湯タ
ンクの底部から取り出した湯水をヒートポンプ式加熱器
と補助加熱器とを併用して、又は、前記ヒートポンプ式
加熱器に代えて前記補助加熱器にて加熱したのち、その
温水を前記貯湯タンクの上部に供給する形態で湯水を循
環させる補助加熱貯湯運転状態に切り換え自在に構成さ
れ、前記循環制御手段が、前記貯湯運転状態において、前記
沸き上げ温度が前記貯湯目標温度範囲の温度よりも低
く、前記ヒートポンプ式加熱器に運転余力が無く、湯水
の循環量が、前記貯湯運転状態で循環させる湯水の最低
流量として設定した設定最低流量よりも少ないときに
は、前記補助加熱貯湯運転状態に切り換えて前記湯水循
環手段の運転を制御するように構成されている請求項１
又は２記載の貯湯式の給湯熱源装置。3. The hot water circulation means uses a heat pump heater and an auxiliary heater to collect hot water taken out from the bottom of the hot water storage tank so that the hot water forms a temperature stratification and is stored in the hot water storage tank. Or after being heated by the auxiliary heater in place of the heat pump heater, is configured to be freely switchable to an auxiliary heating and hot water storage operation state in which hot water is circulated in a mode of supplying the hot water to an upper portion of the hot water storage tank. In the hot water storage operation state, the circulation control means is configured such that the boiling temperature is lower than the temperature in the hot water storage target temperature range, the heat pump heater has no operating reserve, and the circulation amount of the hot water is low. When the flow rate is lower than the minimum flow rate set as the minimum flow rate of the hot and cold water circulated in the state, the operation is switched to the auxiliary heating hot water storage operation state to control the operation of the hot water circulation means. Claim is configured to 1
Or the hot water supply heat source device according to 2 above.