JP6400310B2 - Hot water supply system and control method thereof - Google Patents

Hot water supply system and control method thereof Download PDF

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JP6400310B2
JP6400310B2 JP2014053369A JP2014053369A JP6400310B2 JP 6400310 B2 JP6400310 B2 JP 6400310B2 JP 2014053369 A JP2014053369 A JP 2014053369A JP 2014053369 A JP2014053369 A JP 2014053369A JP 6400310 B2 JP6400310 B2 JP 6400310B2
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hot water
water storage
heat source
storage tank
temperature
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JP2015175563A (en
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小林　隆之
隆之 小林
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Mitsubishi Heavy Industries Thermal Systems Ltd
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Mitsubishi Heavy Industries Thermal Systems Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/26—Vertically distributed at fixed positions, e.g. multiple sensors distributed over the height of a tank, or a vertical inlet distribution pipe having a plurality of orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Description

本発明は、給湯システム及びその制御方法に関するものである。   The present invention relates to a hot water supply system and a control method thereof.

近年、環境問題への関心の高まりから地球温暖化防止のためＣＯ２（二酸化炭素）排出量が少ない電気式ヒートポンプへの移行が注目されている。特に、ＣＯ２冷媒を用いたヒートポンプ給湯機は、従来の燃焼型ボイラと比較して、大幅にＣＯ２が削減でき、冷媒の特性上高い出湯温度を得られランニングコストが削減できることから、普及しつつある。   In recent years, attention has been focused on the shift to an electric heat pump that emits less CO2 (carbon dioxide) in order to prevent global warming due to the growing interest in environmental issues. In particular, heat pump water heaters using CO2 refrigerant are becoming more and more popular because CO2 can be significantly reduced compared to conventional combustion boilers, and the hot water temperature can be obtained due to the characteristics of the refrigerant and the running cost can be reduced. .

下記特許文献１では、家庭用のヒートポンプ給湯装置として、冷媒が循環する冷媒回路を構成し、室外の空気（外気）と冷媒との間で熱交換を行う熱源機（ヒートポンプユニット）と、熱源機により加熱された湯を貯留させる貯湯タンクとを備えており、貯湯タンクを有するタンクユニットに設けられる給湯制御部によって、タンクユニット内の各センサの出力を受けて各機器の動作を制御し、給湯制御部と接続されたリモコンからの設定に応じて給湯や風呂動作を行わせている。   In the following Patent Document 1, as a heat pump hot water supply device for home use, a heat source machine (heat pump unit) that constitutes a refrigerant circuit in which a refrigerant circulates and exchanges heat between outdoor air (outside air) and the refrigerant, and a heat source machine A hot water storage tank for storing hot water heated by the tank, and a hot water supply control unit provided in the tank unit having the hot water storage tank receives the output of each sensor in the tank unit to control the operation of each device. Hot water supply and bath operation are performed according to settings from a remote controller connected to the control unit.

特開２０１２−１４９７９５号公報JP 2012-149795 A

ところで、業務用のヒートポンプ給湯装置は、熱源機と貯湯タンクが大きくなることからスペースの問題や、貯湯タンクに貯留させる湯量が多くなることから耐荷重の問題等により、貯湯タンクを熱源機の傍に配置できず、貯湯タンクと熱源機との距離を離して配置させることがある。また、業務用のヒートポンプ給湯装置の熱源機と貯湯タンク間が、貯湯タンクに設けられる温度センサまたは水位センサからの電気配線を延長して、熱源機側に設けられる制御装置に接続されており、熱源機側の制御装置は電気配線を介して各種センサから得られる情報によって熱源機を制御している。   By the way, the heat pump hot water supply device for business uses a hot water storage tank and a hot water storage tank that are large, so that the hot water storage tank is located near the heat source device due to a space problem and a large amount of hot water stored in the hot water storage tank. In some cases, the hot water storage tank and the heat source device are separated from each other. In addition, between the heat source of the heat pump hot water supply device for business use and the hot water storage tank, the electric wiring from the temperature sensor or water level sensor provided in the hot water storage tank is extended and connected to the control device provided on the heat source device side, The control device on the heat source machine side controls the heat source machine according to information obtained from various sensors via electrical wiring.

しかしながら、熱源機と貯湯タンク間の配置距離が長い場合には、電気配線のノイズ耐力に問題があることから、熱源機側における貯湯タンクの温度や水位の誤検知のリスクが発生する虞があった。また、上記特許文献１は、熱源機側のヒーポン制御部とタンクユニット内の給湯制御部とを通信線と電力線で二重化する技術であり、貯湯タンクから湯水の温度を検出する貯湯温度センサから得られる情報を、熱源機側で誤検知のリスクを抑制して取得することはできなかった。   However, if the arrangement distance between the heat source unit and the hot water storage tank is long, there is a problem with the noise resistance of the electrical wiring, and there is a risk of erroneous detection of the temperature and water level of the hot water storage tank on the heat source unit side. It was. Further, the above-mentioned Patent Document 1 is a technology for duplicating the heat source control unit on the heat source unit side and the hot water supply control unit in the tank unit with a communication line and a power line, and obtained from a hot water storage temperature sensor that detects the temperature of hot water from the hot water storage tank. It was not possible to acquire the information that can be obtained by suppressing the risk of false detection on the heat source machine side.

本発明は、このような事情に鑑みてなされたものであって、貯湯タンク側から得られる情報を誤りなく熱源機側に伝えることのできる給湯システム及びその制御方法を提供することを目的とする。   This invention is made | formed in view of such a situation, Comprising: It aims at providing the hot water supply system which can transmit the information obtained from the hot water storage tank side to the heat-source equipment side without an error, and its control method. .

上記課題を解決するために、本発明は以下の手段を採用する。
本発明は、熱源機と、前記熱源機により加熱された湯を貯留する貯湯タンク内の貯湯量を検出する貯湯量検出手段と、前記熱源機により加熱された湯を前記貯湯タンクに供給する経路上に設けられ、制御信号により前記貯湯タンクの上部に供給する流量が調整される電動弁と、前記熱源機により加熱された湯を前記電動弁から前記貯湯タンクの下部に接続する給水配管へバイパスさせる水配管と、前記熱源機に設けられ、前記貯湯量検出手段から検出された前記貯湯量の情報及び前記電動弁の開度信号に基づいて前記熱源機を制御する制御手段と、前記貯湯量検出手段及び前記電動弁と電気配線で接続され、前記電気配線を介して、前記貯湯量検出手段により検出された前記貯湯量の情報及び前記電動弁の開度信号を入出力し、かつ、前記制御手段と通信線で接続され、前記電気配線を介して入出力された前記貯湯量の情報及び前記電動弁の開度信号を、前記通信線を介して前記制御手段と授受可能な信号に変換するインタフェース手段とを具備し、前記制御手段は、前記インタフェース手段と前記通信線を介して情報の授受可能に接続できる第１接続手段を有する給湯システムを提供する。 In order to solve the above problems, the present invention employs the following means.
The present invention provides a heat source device, a hot water storage amount detecting means for detecting a hot water storage amount in a hot water storage tank for storing hot water heated by the heat source device, and a path for supplying the hot water heated by the heat source device to the hot water storage tank A motor-operated valve that is provided on the top and adjusts the flow rate supplied to the upper part of the hot water storage tank by a control signal, and hot water heated by the heat source device is bypassed from the motorized valve to a water supply pipe connected to the lower part of the hot water storage tank A water pipe to be controlled, control means for controlling the heat source device based on the information on the hot water amount detected from the hot water storage amount detection means and the opening signal of the electric valve, provided in the heat source device, and the hot water storage amount And connected to the detection means and the motor-operated valve by electrical wiring, and through the electrical wiring, the information on the hot water amount detected by the hot water storage amount detection means and the opening signal of the motor-operated valve are input and output, and System The information on the amount of stored hot water and the opening signal of the motor-operated valve connected to the control means via a communication line and input / output via the electrical wiring are converted into signals that can be exchanged with the control means via the communication line. And an interface means, wherein the control means provides a hot water supply system having a first connection means that can be connected to the interface means so as to be able to exchange information via the communication line.

本発明によれば、熱源機により加熱された湯を貯湯する貯湯タンク内の貯湯量が検出されると電気配線を介してインタフェース手段に送られ、熱源機により加熱された湯を貯湯タンクに供給する経路上の電動弁の開度信号は、電気配線を介してインタフェース手段に送られる。電気配線を介して取得した貯湯量の情報及び電動弁の開度信号は、通信線で授受可能な信号に変換されるので、インタフェース手段と制御手段とを接続する通信線を介して制御手段に送られ、制御手段は、通信線を介して取得した貯湯量の情報及び電動弁の開閉信号に基づいて熱源機を制御する。
従来、貯湯タンクから検出される貯湯量の情報や電動弁の開閉信号は、接続される電気配線が延長されて熱源機側に計測値が入力されていたが、その場合には熱源機と貯湯タンクとの距離が離れた場合に減衰が大きくなり、貯湯量の情報や電動弁の開度信号が正確に届けられなかった。本発明は、熱源機と貯湯タンクとの間にインタフェース手段を設け、インタフェース手段と熱源機とが通信線で接続され、通信線を介して貯湯量の情報や電動弁の開度信号の情報が熱源機に入力されるので、熱源機と貯湯タンクの距離が離れた場合であっても、従来と比較して、貯湯量の情報及び電動弁の開度信号の情報が確実に熱源機に届けられる。
なお、熱源機と貯湯タンクとの距離が離れる場合とは、例えば、２０ｍ以上である。 According to the present invention, when the amount of hot water stored in the hot water storage tank for storing hot water heated by the heat source device is detected, the hot water heated by the heat source device is supplied to the hot water storage tank. The opening signal of the motor-operated valve on the route to be sent is sent to the interface means via the electric wiring. Since the information on the amount of hot water obtained through the electrical wiring and the opening signal of the motor-operated valve are converted into signals that can be exchanged via the communication line, the information is transferred to the control means via the communication line connecting the interface means and the control means. The control means controls the heat source device based on the information on the amount of hot water obtained via the communication line and the open / close signal of the motor-operated valve.
Conventionally, the information on the amount of hot water detected from the hot water storage tank and the open / close signal of the motorized valve have been input to the heat source machine with the connected electrical wiring extended, but in that case the heat source machine and hot water storage When the distance from the tank was increased, the attenuation increased, and the information on the amount of stored hot water and the opening signal of the electric valve could not be delivered accurately. The present invention provides an interface means between the heat source machine and the hot water storage tank, the interface means and the heat source machine are connected by a communication line, and information on the amount of hot water storage and information on the opening signal of the motorized valve are transmitted via the communication line. Since it is input to the heat source machine, even when the distance between the heat source machine and the hot water storage tank is far away, information on the amount of hot water storage and information on the opening signal of the motorized valve are delivered to the heat source machine more reliably than before. It is done.
In addition, the case where the distance of a heat-source machine and a hot water storage tank leaves | separates is 20 m or more, for example.

上記給湯システムにおいて、前記制御手段は、前記電気配線を介して前記貯湯量検出手段と情報の授受可能とする第２接続手段と、前記電気配線を介して前記電動弁と情報の授受可能とする第３接続手段とを具備することとしてもよい。
熱源機が導入される施工パターンに応じて、熱源機に設けられる制御手段に入出力される情報は、通信線を使用するか、電気配線を使用するかの選択が可能となる。 In the hot water supply system, the control means enables the second connection means that can exchange information with the hot water storage amount detection means via the electric wiring, and can exchange information with the electric valve via the electric wiring. It is good also as comprising a 3rd connection means.
Depending on the construction pattern in which the heat source machine is introduced, the information input / output to / from the control means provided in the heat source machine can be selected to use a communication line or an electrical wiring.

上記給湯システムは、前記貯湯タンクに流入する湯の入口近傍に取り付けられ、前記貯湯タンクの入口の温度を検出し、検出された前記温度の情報を前記制御手段に出力する温度検出手段を具備し、前記制御手段は、前記温度検出手段によって検出された前記温度に基づいて、前記熱源機を制御することとしてもよい。   The hot water supply system is provided in the vicinity of the inlet of hot water flowing into the hot water storage tank, and includes temperature detection means for detecting the temperature of the inlet of the hot water storage tank and outputting the detected temperature information to the control means. The control unit may control the heat source unit based on the temperature detected by the temperature detection unit.

熱源機と貯湯タンクの距離が離れている場合には、熱源機で加熱された湯は途中経路で放熱され貯湯タンクに供給される時点では熱源機で加熱された温度よりも低い温度になっていることが考えられる。本発明では、貯湯タンクの入口の温度に応じて熱源機の制御を行うので、熱源機と貯湯タンクの距離が離れている場合であっても、放熱を勘案して所望の温度の湯を貯湯タンクに供給できる。   When the distance between the heat source machine and the hot water storage tank is long, the hot water heated by the heat source machine becomes a temperature lower than the temperature heated by the heat source machine when it is dissipated in the middle path and supplied to the hot water storage tank. It is possible that In the present invention, since the heat source unit is controlled according to the temperature of the hot water storage tank inlet, even when the distance between the heat source unit and the hot water storage tank is long, the hot water having a desired temperature is stored in consideration of heat radiation. Can be supplied to the tank.

本発明は、熱源機により加熱された湯を貯留する貯湯タンク内の貯湯量を検出する検出過程と、前記熱源機により加熱された湯を前記貯湯タンクの上部に供給する経路上に設けられる電動弁の制御信号により、前記貯湯タンクに供給する流量が調整される過程と、前記熱源機により加熱された湯を前記電動弁から前記貯湯タンクの下部に接続する給水配管へバイパスさせる過程と、検出された前記貯湯量の情報及び前記電動弁の開度信号に基づいて、前記熱源機を前記熱源機側で制御する過程と、電気配線を介して、前記検出過程により検出された前記貯湯量の情報及び前記電動弁の開度信号を入出力し、かつ、前記電気配線を介して入出力された前記貯湯量の情報及び前記電動弁の開閉信号を、通信線を介して授受可能な信号に変換する過程とを有する給湯システムの制御方法を提供する。 The present invention provides a detection process for detecting the amount of hot water stored in a hot water storage tank for storing hot water heated by a heat source device, and an electric motor provided on a path for supplying hot water heated by the heat source device to the upper part of the hot water storage tank. the control signal of the valve, the process of bypassing the and over extent flow rate supplied to the hot water storage tank that is adjusted to the water supply pipe for connecting the hot water heated by the heat source unit to a lower portion of the hot water storage tank from the electric valve, based on the information of said detected amount of hot water storage and opening signal of the motor-operated valve, an over extent that controls the heat source apparatus at the heat source equipment side, through electrical wiring, which is detected by said detecting step the Information on the amount of stored hot water and the opening signal of the motor-operated valve can be input / output, and information on the amount of stored hot water and the opening / closing signal of the motor-operated valve input / output via the electrical wiring can be exchanged via a communication line. over that converts into a signal To provide a control method for hot-water supply system with and.

本発明は、貯湯タンク側から得られる情報を誤りなく熱源機側に伝えることができるという効果を奏する。   The present invention has an effect that information obtained from the hot water storage tank side can be transmitted to the heat source machine side without error.

本発明の第１の実施形態に係る給湯システムの概略構成図である。1 is a schematic configuration diagram of a hot water supply system according to a first embodiment of the present invention. 本発明の第１の実施形態に係る制御部の概略構成である。It is a schematic structure of the control part which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態の変形例に係る給湯システムの貯湯タンクの一例の図である。It is a figure of an example of the hot water storage tank of the hot water supply system which concerns on the modification of the 1st Embodiment of this invention. 本発明の第２の実施形態に係る給湯システムの概略構成図である。It is a schematic block diagram of the hot water supply system which concerns on the 2nd Embodiment of this invention.

以下に、本発明に係る給湯システム及びその制御方法の実施形態について、図面を参照して説明する。   Hereinafter, an embodiment of a hot water supply system and a control method thereof according to the present invention will be described with reference to the drawings.

〔第１の実施形態〕
本実施形態においては、本発明の給湯システムが、自然冷媒ＣＯ２採用の熱源機（ヒートポンプユニット）と貯湯ユニットの組み合わせで、大規模施設の湯量に対応できる業務用のエコキュート（登録商標）である場合を例に挙げて説明するが、本発明はこれに限定されない。
図１に示されるように、給湯システム１は、熱源機３と、貯湯ユニット２と、水配管４ａ，４ｂ，４ｃ，４ｄ，４ｅと、電気配線５ａ，５ｂと、通信線６と、インタフェース部（インタフェース手段）７と、温度検出部（温度検出手段）８を備えている。 [First Embodiment]
In the present embodiment, the hot water supply system of the present invention is a business-use Ecocute (registered trademark) that can cope with the amount of hot water in a large-scale facility by combining a heat source unit (heat pump unit) employing a natural refrigerant CO2 and a hot water storage unit. However, the present invention is not limited to this.
As shown in FIG. 1, a hot water supply system 1 includes a heat source unit 3, a hot water storage unit 2, water pipes 4a, 4b, 4c, 4d, and 4e, electrical wirings 5a and 5b, a communication line 6, and an interface unit. (Interface means) 7 and a temperature detection section (temperature detection means) 8 are provided.

熱源機３は、空気中の熱をＣＯ２冷媒が吸収し、圧縮機（コンプレッサ）で圧縮されてさらに高温になり、高温の冷媒が熱を伝えて、水を設定温度に沸かす。本実施形態における熱源機３は、作動媒体としてＣＯ２冷媒を充填した超臨界サイクルのヒートポンプとするが、それ自体は公知のものであってよい。また、熱源機３は、ＣＯ２冷媒を使用した超臨界サイクルのヒートポンプを用いたものを例に挙げるが、熱源機３は、本実施形態のヒートポンプに限定されるものではなく、ボイラ、燃料電池等、他の構成機器としてもよい。
熱源機３は、貯湯ユニット２側から供給される水を導く水配管４ａ、及び高温水を排出する水配管４ｂと接続されており、水配管４ａから給水された低温の水を加熱し、加熱後の高温水（例えば、６０〜７０℃程度。以下「湯」ともいう。）を水配管４ｂへと導く。 The heat source device 3 absorbs the heat in the air by the CO2 refrigerant, is compressed by the compressor (compressor) and becomes higher in temperature, and the high-temperature refrigerant transfers heat to boil water to the set temperature. The heat source unit 3 in the present embodiment is a supercritical cycle heat pump filled with CO2 refrigerant as a working medium, but may be a publicly known one. In addition, the heat source device 3 is exemplified by a heat pump using a supercritical cycle heat pump using a CO 2 refrigerant. However, the heat source device 3 is not limited to the heat pump of the present embodiment, and includes a boiler, a fuel cell, and the like. Other components may be used.
The heat source unit 3 is connected to a water pipe 4a for guiding water supplied from the hot water storage unit 2 side and a water pipe 4b for discharging high-temperature water, and heats and heats low-temperature water supplied from the water pipe 4a. The subsequent high-temperature water (for example, about 60 to 70 ° C., hereinafter also referred to as “hot water”) is led to the water pipe 4b.

水配管４ｃは、貯湯タンク２０内の湯（温水）を供給先まで導く給湯経路である。
水配管４ｄは、熱源機３から排出される湯の温度が所望温度（設定温度）に到達していない場合に、貯湯タンク２０の下部側に導く経路であり、水配管４ｅにバイパスさせる。
水配管４ｅは、貯湯タンク２０に低温の水を供給する給水配管であり、水道に繋がる経路である。 The water pipe 4c is a hot water supply path that guides hot water (hot water) in the hot water storage tank 20 to a supply destination.
The water pipe 4d is a path that leads to the lower side of the hot water storage tank 20 when the temperature of the hot water discharged from the heat source device 3 has not reached the desired temperature (set temperature), and is bypassed to the water pipe 4e.
The water pipe 4e is a water supply pipe that supplies low-temperature water to the hot water storage tank 20, and is a path that leads to water.

貯湯ユニット２は、貯湯タンク２０と、貯湯量検出部（貯湯量検出手段）２１ａ，２１ｂ・・・２１ｎとを備えている。以下特に明記しない場合には、貯湯量検出部は、貯湯量検出部２１とする。
貯湯タンク２０は、水道から水配管４ｅを介して水（例えば、１０℃）が供給され、熱源機３により加熱された湯（例えば、６０〜７０℃）が、水配管４ｂを介して上部から供給される。これにより、貯湯タンク２０のタンク内は下部に水、上部にお湯の温度層が形成される。貯湯タンク２０には、貯湯量検出部２１が設けられており、貯湯量検出部２１によって温度層の境界が検出されるようになっている。 The hot water storage unit 2 includes a hot water storage tank 20 and a hot water storage amount detection unit (hot water storage amount detection means) 21a, 21b,. Hereinafter, the hot water storage amount detection unit is referred to as a hot water storage amount detection unit 21 unless otherwise specified.
The hot water storage tank 20 is supplied with water (for example, 10 ° C.) from the water through the water pipe 4e, and hot water (for example, 60 to 70 ° C.) heated by the heat source unit 3 is supplied from the upper side through the water pipe 4b. Supplied. Thereby, in the tank of the hot water storage tank 20, the temperature layer of water is formed in the lower part and hot water in the upper part. The hot water storage tank 20 is provided with a hot water storage amount detection unit 21 so that the boundary of the temperature layer is detected by the hot water storage amount detection unit 21.

貯湯量検出部２１は、貯湯タンク２０に複数設けられ、熱源機３により加熱された湯を貯留する貯湯タンク２０内の貯湯量を検出する。例えば、貯湯タンク２０には、温度センサとなるサーミスタが縦方向（上下方向）に沿って貯湯量検出部２１ａ，２１ｂ・・・及び２１ｎが設けられている。この複数個の貯湯量検出部２１ａ，２１ｂ・・・２１ｎのうち、貯湯量検出部２１ａは、１００％貯湯位置に設けられた温度センサ、貯湯量検出部２１ｂは、例えば、９０％貯湯位置に設けられた温度センサ、貯湯量検出部２１ｎは、例えば、１０％貯湯位置に設けられた温度センサとする。   A plurality of hot water storage detectors 21 are provided in the hot water storage tank 20 and detect the amount of hot water stored in the hot water storage tank 20 that stores the hot water heated by the heat source device 3. For example, the hot water storage tank 20 is provided with hot water storage amount detection units 21a, 21b,..., 21n along the vertical direction (vertical direction) of the thermistor serving as a temperature sensor. Among the plurality of hot water storage amount detection units 21a, 21b,... 21n, the hot water storage amount detection unit 21a is a temperature sensor provided at a 100% hot water storage position, and the hot water storage amount detection unit 21b is, for example, at a 90% hot water storage position. The provided temperature sensor and the hot water storage amount detection unit 21n are, for example, temperature sensors provided at a 10% hot water storage position.

各貯湯量検出部２１ａ，２１ｂ・・・２１ｎ（各温度センサ）から検出された温度の情報をインタフェース部７に出力する。さらに、各温度センサから検出された温度の情報が制御部３０（詳細は後述する）に出力されると、制御部３０は、温度の境界を検出し、境界となる温度を検出した温度センサの位置に基づいて、貯湯量が検出できるようになっている。なお、サーミスタは、温度が高くなると抵抗値が減少し、温度が低くなると抵抗値が増加する特性を有する。
本実施形態においては、貯湯量検出部２１が９個設けられる場合を例に挙げているが、貯湯量検出部２１の個数は特に限定されない。 Information of the temperature detected from each hot water storage amount detection part 21a, 21b ... 21n (each temperature sensor) is output to the interface part 7. Further, when the temperature information detected from each temperature sensor is output to the control unit 30 (details will be described later), the control unit 30 detects the temperature boundary and detects the temperature of the temperature sensor that has detected the boundary temperature. The amount of stored hot water can be detected based on the position. The thermistor has a characteristic that the resistance value decreases as the temperature increases, and the resistance value increases as the temperature decreases.
In the present embodiment, the case where nine hot water storage amount detection units 21 are provided is taken as an example, but the number of hot water storage amount detection units 21 is not particularly limited.

電動弁９は、熱源機３により加熱された湯を貯湯タンク２０に供給する水配管４ｂの経路上に設けられ、制御信号により貯湯タンク２０に供給する流量を調整する。具体的には、電動弁９は、熱源機３から排出される湯の温度が所望の温度に到達していない場合に制御部３０から出力される制御信号に基づいて、湯を貯湯タンク２０の下部と接続される水配管４ｄに流通させ、熱源機３から排出される湯の温度が所望の温度に到達した場合に制御部３０から出力される制御信号に基づいて、湯を貯湯タンク２０の上部と接続される水配管４ｂに供給する。   The motor-operated valve 9 is provided on the path of the water pipe 4b for supplying hot water heated by the heat source device 3 to the hot water storage tank 20, and adjusts the flow rate supplied to the hot water storage tank 20 by a control signal. Specifically, the motor operated valve 9 supplies hot water to the hot water storage tank 20 based on a control signal output from the control unit 30 when the temperature of the hot water discharged from the heat source device 3 does not reach a desired temperature. Based on the control signal output from the control unit 30 when the temperature of the hot water discharged from the heat source unit 3 reaches a desired temperature by flowing through the water pipe 4d connected to the lower part, the hot water is stored in the hot water storage tank 20. It supplies to the water piping 4b connected with an upper part.

なお、本実施形態においては、熱源機３と貯湯ユニット２の貯湯タンク２０との距離は、１００〔ｍ〕である場合として説明するが、距離は限定されない。   In the present embodiment, the distance between the heat source device 3 and the hot water storage tank 20 of the hot water storage unit 2 will be described as being 100 [m], but the distance is not limited.

インタフェース部７は、貯湯量検出部２１と電気配線５ａで接続され、貯湯量検出部２１により検出された貯湯量の情報を取得する。インタフェース部７は、電動弁９と電気配線５ｂで接続され、電動弁９の開度信号を入出力する。また、インタフェース部７が配置される位置は特に限定されないが、貯湯タンク２０近傍に設けられている。   The interface unit 7 is connected to the hot water storage amount detection unit 21 through the electrical wiring 5a, and acquires information on the hot water storage amount detected by the hot water storage amount detection unit 21. The interface unit 7 is connected to the motor-operated valve 9 by an electric wiring 5b, and inputs and outputs an opening degree signal of the motor-operated valve 9. The position where the interface unit 7 is disposed is not particularly limited, but is provided in the vicinity of the hot water storage tank 20.

インタフェース部７は、制御部３０と通信線６で接続され、電気配線５ａ，５ｂを介して入力された貯湯量の情報及び電動弁９の開度信号を、通信線６を介して制御部３０と授受可能な信号に変換して制御部３０に出力し、通信線６を介して制御部３０から取得した制御信号を電動弁９と授受可能な信号に変換して、電気配線５ｂを介して電動弁９に出力する。   The interface unit 7 is connected to the control unit 30 via the communication line 6, and the information on the amount of hot water and the opening degree signal of the electric valve 9 input via the electric wirings 5 a and 5 b are transmitted via the communication line 6 to the control unit 30. Is converted into a signal that can be exchanged and output to the control unit 30, and the control signal acquired from the control unit 30 via the communication line 6 is converted into a signal that can be exchanged with the motor-operated valve 9, and is transmitted via the electric wiring 5b. Output to the motorized valve 9.

熱源機３は、制御部（制御手段）３０を備えている。
制御部３０は、熱源機３に設けられる各種機器、温度検出部（温度検出手段）８及び電動弁９等と情報の授受可能に接続されており、これら機器等に制御信号を出力する。
制御部３０は、例えば、図２に示されるように、プログラムを実行するＣＰＵ（中央演算処理装置）３３、ＣＰＵによる演算結果等を一時的に記憶させるＲＡＭ（Ｒａｎｄｏｍ Ａｃｃｅｓｓ Ｍｅｍｏｒｙ）などの主記憶装置３４、ＣＰＵによって実行されるプログラムを記憶する補助記憶装置３５、デジタルＩ／Ｏ等の入出力インタフェース３６、及び通信インタフェース３７を主体とするマイクロコンピュータにより構成されている。 The heat source device 3 includes a control unit (control unit) 30.
The control unit 30 is connected to various devices provided in the heat source device 3, the temperature detection unit (temperature detection means) 8, the electric valve 9, and the like so as to be able to exchange information, and outputs a control signal to these devices.
As shown in FIG. 2, for example, the control unit 30 is a main storage device such as a CPU (Central Processing Unit) 33 that executes a program, and a RAM (Random Access Memory) that temporarily stores a calculation result by the CPU. 34, an auxiliary storage device 35 for storing a program executed by the CPU, an input / output interface 36 such as a digital I / O, and a microcomputer mainly including a communication interface 37.

制御部３０は、リモコン１０等の指示入力装置と接続されており、給湯システム１の利用者がリモコン１０を介して入力した設定温度（要求温度）及び貯湯タンク２０の要求貯湯量の情報を取得する。
制御部３０は、給湯システム１の運転時、低温の水が導入される水配管４ａ側と高温の湯が排出される水配管４ｂ側にそれぞれ設置される温度センサ（図示略）の検出値に基づいて、熱源機３の図示しない圧縮機及び水ポンプの回転数を制御して温水製造能力を制御し、設定温度（要求温度）の高温水を製造する。また制御部３０は、貯湯量検出部２１ａ，２１ｂ・・・，及び２１ｎの検出値に基づいて、給湯システム１の運転時、熱源機３及び水ポンプの運転停止を制御し、いわゆる沸き上げ運転及び沸き増し運転等を行うものである。 The control unit 30 is connected to an instruction input device such as the remote controller 10, and acquires information on a set temperature (required temperature) input by the user of the hot water supply system 1 via the remote controller 10 and a required hot water storage amount of the hot water storage tank 20. To do.
When the hot water supply system 1 is operated, the control unit 30 sets the detection values of temperature sensors (not shown) installed on the side of the water pipe 4a where the low temperature water is introduced and the side of the water pipe 4b where the hot water is discharged. Based on this, the number of rotations of the compressor and the water pump (not shown) of the heat source unit 3 are controlled to control the hot water production capacity, and high temperature water having a set temperature (required temperature) is produced. Further, the control unit 30 controls the shutdown of the heat source unit 3 and the water pump during the operation of the hot water supply system 1 based on the detection values of the hot water storage amount detection units 21a, 21b,. In addition, an operation to increase boiling is performed.

制御部３０は、熱源機３に設けられ、貯湯量検出部２１から検出された貯湯量の情報及び電動弁９の開度信号に基づいて熱源機３を制御する。具体的には、制御部３０は、インタフェース部７と通信線６を介して情報の授受可能に接続できる第１接続部（第１接続手段）３１を有しており、通信線６を介してインタフェース部７と接続された場合には、インタフェース部７で通信線６を介して授受可能な形式に変換後の貯湯量の情報及び電動弁９の開度信号を、通信線６を介して取得する。   The control unit 30 is provided in the heat source unit 3 and controls the heat source unit 3 based on the information on the amount of hot water detected from the hot water storage amount detection unit 21 and the opening signal of the electric valve 9. Specifically, the control unit 30 includes a first connection unit (first connection means) 31 that can be connected to the interface unit 7 via the communication line 6 so as to be able to exchange information. When connected to the interface unit 7, the information about the amount of stored hot water and the opening degree signal of the motor-operated valve 9 after being converted into a format that can be exchanged via the communication line 6 by the interface unit 7 are acquired via the communication line 6. To do.

制御部３０は、インタフェース部７を介さずに、電気配線５ａを介して貯湯量検出部２１と情報の授受可能とする第２接続部（第２接続手段）３２ａと、インタフェース部７を介さずに、電気配線５ｂを介して電動弁９と情報の授受可能とする第３接続部（第３接続手段）３２ｂとを有していてもよい。これにより、本発明を既設の貯湯タンクに流用することができ、インタフェース部７がない場合の給湯システムでも使用できる。   The control unit 30 does not go through the interface unit 7 but the second connection unit (second connection means) 32a that can exchange information with the hot water storage amount detection unit 21 through the electric wiring 5a. Furthermore, you may have the 3rd connection part (3rd connection means) 32b which enables transfer of information with the motor operated valve 9 via the electrical wiring 5b. Thereby, this invention can be diverted to the existing hot water storage tank, and can be used also in the hot water supply system in case there is no interface part 7. FIG.

制御部３０は、貯湯量検出部２１によって検出された各温度センサの温度の情報に基づいて、貯湯タンク２０内の湯と水の温度の境界を検出して、貯湯タンク内の貯湯量を推定する。   Based on the temperature information of each temperature sensor detected by the hot water storage amount detection unit 21, the control unit 30 detects the boundary between the hot water and the water temperature in the hot water storage tank 20, and estimates the hot water storage amount in the hot water storage tank. To do.

温度検出部８は、貯湯タンク２０に流入する湯の入口近傍に取り付けられ、貯湯タンク２０の入口の配管の温度を検出して、検出された温度の情報を制御部３０に出力する。本実施形態においては、温度検出部８は、配管内を流れる流体（湯）の温度を、配管部分の温度を検出することで代用している。温度検出部８は、例えば、温度センサとなるサーミスタである。   The temperature detection unit 8 is attached in the vicinity of the inlet of hot water flowing into the hot water storage tank 20, detects the temperature of the piping at the inlet of the hot water storage tank 20, and outputs the detected temperature information to the control unit 30. In the present embodiment, the temperature detector 8 substitutes the temperature of the fluid (hot water) flowing through the pipe by detecting the temperature of the pipe portion. The temperature detector 8 is a thermistor that serves as a temperature sensor, for example.

なお、温度検出部８と制御部３０とは、インタフェース部７を介して接続されていることとするが、これに限定されず、温度検出部８と制御部３０とはインタフェース部７を介さずに直接接続されても良い。具体的には、インタフェース部７を介す場合は、温度検出部８とインタフェース部７とを電気配線で接続し、インタフェース部７と制御部３０とを通信線で接続する。インタフェース部７を介さない場合には温度検出部８と制御部３０とを電気配線で接続する。   In addition, although the temperature detection part 8 and the control part 30 shall be connected via the interface part 7, it is not limited to this, The temperature detection part 8 and the control part 30 do not pass the interface part 7. It may be connected directly to. Specifically, when the interface unit 7 is used, the temperature detection unit 8 and the interface unit 7 are connected by electric wiring, and the interface unit 7 and the control unit 30 are connected by a communication line. When the interface unit 7 is not interposed, the temperature detection unit 8 and the control unit 30 are connected by electrical wiring.

温度検出部８より貯湯タンク２０の入口の温度情報を取得した制御部３０は、検出された温度に基づいて、熱源機３の圧縮機と水ポンプを制御する。このように、貯湯タンク２０の入口の温度に応じて熱源機３の制御を行うことにより、熱源機３と貯湯タンク２０の距離が離れている場合であっても、放熱を勘案して所望の温度の湯を貯湯タンク２０に供給できる。   The control part 30 which acquired the temperature information of the inlet_port | entrance of the hot water storage tank 20 from the temperature detection part 8 controls the compressor and water pump of the heat source apparatus 3 based on the detected temperature. In this way, by controlling the heat source unit 3 according to the temperature of the inlet of the hot water storage tank 20, even if the distance between the heat source unit 3 and the hot water storage tank 20 is long, the desired heat radiation can be taken into account. Hot water of temperature can be supplied to the hot water storage tank 20.

以下に本発明の給湯システム１の作用について説明する。
給湯システム１のユーザによってリモコン１０が操作され、蛇口側（つまり、水配管４ｃから出湯させる箇所。例えば、シャワーや洗浄ライン等のユーザ利用位置）における設定温度（要求温度）及び／または貯湯タンク２０の貯湯量の情報が入力される。
水道から水配管４ｅを介して貯湯タンク２０に水が供給される。貯湯タンク２０から水配管４ａを介して熱源機３に供給される水が、熱源機３により加熱されて湯（例えば、７０℃）とされ、熱源機３により加熱された湯は、水配管４ｂに排出される。 Below, the effect | action of the hot water supply system 1 of this invention is demonstrated.
The remote controller 10 is operated by the user of the hot water supply system 1 to set the temperature (required temperature) and / or the hot water storage tank 20 on the faucet side (that is, the location where the hot water is discharged from the water pipe 4c. Information on the amount of hot water stored in is input.
Water is supplied from the water supply to the hot water storage tank 20 through the water pipe 4e. The water supplied from the hot water storage tank 20 to the heat source unit 3 through the water pipe 4a is heated by the heat source unit 3 to be hot water (for example, 70 ° C.), and the hot water heated by the heat source unit 3 is the water pipe 4b. To be discharged.

熱源機３から排出される湯の温度が設定温度（要求温度）になるまで、電動弁９が制御されて、熱源機３から排出された湯は水配管４ｂから水配管４ｄを介して貯湯タンク２０の下部から貯湯タンク２０に供給される。熱源機３により加熱された湯の温度が設定温度になった場合には、電動弁９が制御されて、熱源機３から排出された湯が水配管４ｂから電動弁９を介して貯湯タンク２０の上部に繋がる水配管４ｂに流通され、貯湯タンク２０の上部から貯湯タンク２０に湯が供給される。   The motor-operated valve 9 is controlled until the temperature of the hot water discharged from the heat source device 3 reaches a set temperature (required temperature), and the hot water discharged from the heat source device 3 is stored in the hot water storage tank via the water pipe 4b and the water pipe 4d. The hot water storage tank 20 is supplied from the lower part of 20. When the temperature of the hot water heated by the heat source device 3 reaches the set temperature, the electric valve 9 is controlled, and the hot water discharged from the heat source device 3 is stored in the hot water storage tank 20 via the electric valve 9 from the water pipe 4b. The hot water is supplied to the hot water storage tank 20 from the upper part of the hot water storage tank 20.

貯湯量を検出する複数の温度センサにより検出された温度情報は、電気配線５ａを介してインタフェース部７に出力される。また、電動弁９の開度信号は、電気配線５ｂを介してインタフェース部７に出力される。
電気配線５ａ，５ｂを介して取得した貯湯量の情報（温度情報）及び電動弁９の開度信号は、通信線６で授受可能な信号に変換される。インタフェース部７により変換後の貯湯量の情報及び電動弁９の開度信号は、インタフェース部７と制御部３０とを接続する通信線６を介して、制御部３０に送られる。 The temperature information detected by the plurality of temperature sensors that detect the amount of stored hot water is output to the interface unit 7 via the electrical wiring 5a. The opening signal of the motor operated valve 9 is output to the interface unit 7 through the electric wiring 5b.
Information on the amount of hot water (temperature information) acquired through the electrical wirings 5 a and 5 b and the opening signal of the motor-operated valve 9 are converted into signals that can be transmitted and received through the communication line 6. Information on the hot water storage amount converted by the interface unit 7 and the opening signal of the motor operated valve 9 are sent to the control unit 30 via the communication line 6 connecting the interface unit 7 and the control unit 30.

制御部３０において、複数の温度センサから検出されたそれぞれの温度情報に基づいて、貯湯タンク２０における温度の境界が検出され、温度の境界として検出された温度センサの配置位置近傍が温度層の境目と判定され、貯湯量が推定される。推定された貯湯量が、ユーザ（リモコン）からの要求貯湯量に達していない場合には、貯湯タンク２０による水の加熱を継続し、要求貯湯量になるまで給湯を繰り返す。
また、電動弁９の開度信号は制御部３０にフィードバックされ、制御部３０は、適宜熱源機３を制御するとともに、熱源機３から排出される湯の温度及び出湯側の設定温度に基づいて、電動弁９を制御する。 The controller 30 detects the temperature boundary in the hot water storage tank 20 based on the temperature information detected from the plurality of temperature sensors, and the vicinity of the position where the temperature sensor is detected as the temperature boundary is the boundary of the temperature layer. And the amount of hot water storage is estimated. When the estimated hot water storage amount does not reach the required hot water storage amount from the user (remote control), the water heating by the hot water storage tank 20 is continued, and hot water supply is repeated until the required hot water storage amount is reached.
The opening signal of the motor operated valve 9 is fed back to the control unit 30. The control unit 30 appropriately controls the heat source unit 3, and based on the temperature of hot water discharged from the heat source unit 3 and the set temperature on the outlet side. The motorized valve 9 is controlled.

また、貯湯タンク２０の入口近傍では貯湯タンク２０の入口の配管の温度が検出され、検出された温度の情報が制御部３０に出力される。
取得した貯湯タンク２０の入口近傍の配管の温度に基づいて、蛇口側において設定温度が得られるように熱源機３を制御する。 Further, the temperature of the piping at the inlet of the hot water storage tank 20 is detected in the vicinity of the inlet of the hot water storage tank 20, and information on the detected temperature is output to the control unit 30.
Based on the acquired temperature of the piping near the inlet of the hot water storage tank 20, the heat source unit 3 is controlled so that the set temperature is obtained on the faucet side.

例えば、ユーザが要求する（水配管４ｃにおける）設定温度が７０℃である場合には、熱源機３から水配管４ｂに排出する湯が７０℃となるように熱源機３が制御されている。熱源機３と貯湯タンク２０との距離が長い（例えば、１００ｍとする）場合には、水配管４ｂの経路において放熱が進み、水配管４ｂに流れる湯の温度が低下することにより温度検出部８における配管の温度は６５℃程度に低下することがある。そのため、温度検出部８で検出された配管の温度を制御部３０にフィードバックし、温度検出部８における配管の温度が、ユーザの設定温度に達するように、水配管４ｂの放熱を勘案して熱源機３から排出する湯の温度を７５℃に設定し、熱源機３を制御する。ここで示した温度設定は一例であり、発明を限定するものでない。   For example, when the set temperature requested by the user (in the water piping 4c) is 70 ° C., the heat source device 3 is controlled so that the hot water discharged from the heat source device 3 to the water piping 4b becomes 70 ° C. When the distance between the heat source device 3 and the hot water storage tank 20 is long (for example, 100 m), the heat radiation proceeds in the path of the water pipe 4b, and the temperature of the hot water flowing through the water pipe 4b decreases, whereby the temperature detector 8 The temperature of the pipe at may decrease to about 65 ° C. Therefore, the temperature of the pipe detected by the temperature detection unit 8 is fed back to the control unit 30, and the heat source is taken into consideration of the heat radiation of the water pipe 4b so that the temperature of the pipe in the temperature detection unit 8 reaches the set temperature of the user. The temperature of the hot water discharged from the machine 3 is set to 75 ° C., and the heat source machine 3 is controlled. The temperature setting shown here is an example and does not limit the invention.

以上説明してきたように、本発明に係る給湯システム１及びその制御方法によれば、熱源機３と貯湯タンク２０との間にインタフェース部７を設け、インタフェース部７と熱源機とが通信線６で接続され、通信線６を介して貯湯量の情報や電動弁９の開度信号の情報が熱源機３に入力されるので、熱源機３と貯湯タンク２０の距離が離れた場合であっても、電気配線を延長する場合と比較して、貯湯量の情報及び電動弁９の開度信号の情報が確実に、かつ正確に熱源機３に届けられる。
また、温度検出部８を設け、貯湯タンク２０の入口近傍における温度をフィードバックするので、熱源機３と貯湯タンク２０とが離れていても、熱源機３と貯湯タンク２０との間で生じる放熱を勘案して熱源機３が制御でき、出湯側で所望の温度の湯が得られる。 As described above, according to the hot water supply system 1 and the control method thereof according to the present invention, the interface unit 7 is provided between the heat source unit 3 and the hot water storage tank 20, and the interface unit 7 and the heat source unit are connected to the communication line 6. Since the information on the amount of hot water storage and the information on the opening signal of the motor-operated valve 9 are input to the heat source unit 3 via the communication line 6, the distance between the heat source unit 3 and the hot water storage tank 20 is long. However, compared with the case where the electrical wiring is extended, the information on the amount of stored hot water and the information on the opening signal of the motor operated valve 9 are reliably and accurately delivered to the heat source unit 3.
Moreover, since the temperature detection part 8 is provided and the temperature in the vicinity of the inlet of the hot water storage tank 20 is fed back, even if the heat source device 3 and the hot water storage tank 20 are separated from each other, heat generated between the heat source device 3 and the hot water storage tank 20 is dissipated. In consideration, the heat source unit 3 can be controlled, and hot water having a desired temperature can be obtained on the outlet side.

制御部３０は、インタフェース部７と通信線６で接続できる第１接続部３１と、インタフェース部７を介さずに貯湯量検出部２１と電気配線５ａで接続する第２接続部３２ａと、インタフェース部７を介さずに電動弁９と電気配線５ｂで接続する第３接続部３２ｂとを設けているので、貯湯タンク２０と熱源機３との距離が離れる（２０〔ｍ〕以上）環境においてインタフェース部７を設けて使用することができるとともに、既設の給湯システムにも使用することができる。   The control unit 30 includes a first connection unit 31 that can be connected to the interface unit 7 through the communication line 6, a second connection unit 32a that is connected to the hot water storage amount detection unit 21 through the electrical wiring 5a without using the interface unit 7, and an interface unit. Since the third connection portion 32b that is connected to the motor operated valve 9 and the electric wiring 5b without the interposition 7 is provided, the interface portion in an environment where the distance between the hot water storage tank 20 and the heat source unit 3 is increased (20 [m] or more). 7 can be used and can also be used for an existing hot water supply system.

また、図１に示されるように、貯湯タンク２０に設けられる貯湯量検出部２１の個数に応じて電気配線の配線本数が多くなるので、配線が煩雑になるが、インタフェース部７を設けることにより、電気配線５ａ，５ｂは、インタフェース部７までの配線でよくなるため、煩雑さを低減できる。   Further, as shown in FIG. 1, the number of electrical wirings increases according to the number of hot water storage amount detection units 21 provided in the hot water storage tank 20, so that the wiring becomes complicated. However, by providing the interface unit 7, The electric wirings 5a and 5b can be wiring up to the interface unit 7, so that complexity can be reduced.

〔変形例〕
本発明は、密閉型の貯湯タンク２０を一例として挙げていたが、タンクの種類はこれに限定されず、例えば、図３に示すような開放型のタンク２２であってもよい。図を簡略化するために貯湯タンク付近を拡大して示しており、上記説明した実施形態と共通する部分は省略している。なお、水配管４ａ，４ｂはそれぞれ図１に示される水配管４ａ，４ｂに相当するものとして同じ符号としている。 [Modification]
The present invention has exemplified the sealed hot water storage tank 20 as an example, but the type of the tank is not limited to this, and may be, for example, an open tank 22 as shown in FIG. In order to simplify the drawing, the vicinity of the hot water storage tank is shown enlarged, and portions common to the above-described embodiment are omitted. The water pipes 4a and 4b have the same reference numerals as those corresponding to the water pipes 4a and 4b shown in FIG.

また、図３に示されるように、開放型タンク２２では、１個の温度センサ（温度を検出する）Ａと１個の水位センサ（水圧を検出する）Ｂを有するものとしてもよい。
温度センサＡ及び水位センサＢは、それぞれセンサによる検出値を制御部３０に出力し、制御部３０において貯湯量が検出される。例えば、貯湯量検出部とする水位センサＢがタンク底近傍に設置されており、予め貯湯槽がフル（一杯）にお湯がたまっている状態の水位を１００％と設定しておくことで、水位の変化により貯湯量を知ることができる。
なお、上記実施形態と同様に、温度センサＡ及び水位センサＢと制御部３０間は、インタフェース部７を介して通信線６によって接続されていてもよいし、インタフェース部７を介さず電気配線によって接続されていてもよい。 Further, as shown in FIG. 3, the open tank 22 may have one temperature sensor (detecting temperature) A and one water level sensor (detecting water pressure) B.
The temperature sensor A and the water level sensor B each output a value detected by the sensor to the control unit 30, and the control unit 30 detects the amount of stored hot water. For example, a water level sensor B serving as a hot water storage amount detection unit is installed in the vicinity of the tank bottom, and the water level in a state where hot water is fully accumulated in the hot water storage tank is set to 100% in advance. The amount of hot water storage can be known by the change of.
As in the above embodiment, the temperature sensor A, the water level sensor B, and the control unit 30 may be connected by the communication line 6 via the interface unit 7, or may be connected by electric wiring without the interface unit 7. It may be connected.

〔第２の実施形態〕
以下、本発明の第２の実施形態について図４を用いて説明する。本第２の実施形態に係る給湯システム１´は、熱源機及び貯湯タンクをそれぞれ複数備える点及びインタフェース部と貯湯タンク間が通信線でも接続されている点で第１の実施形態と異なる。以下、第１の実施形態と共通する点については説明を省略し、異なる点について主に説明する。また、符号についても図１と共通する部分は共通する符号を用いている。 [Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. The hot water supply system 1 ′ according to the second embodiment is different from the first embodiment in that a plurality of heat source devices and hot water storage tanks are provided, and the interface unit and the hot water storage tank are connected by a communication line. Hereinafter, description of points common to the first embodiment will be omitted, and different points will be mainly described. Also, with respect to the reference numerals, the same reference numerals are used for the same parts as in FIG.

熱源機３ａは、貯湯タンク２０ａと水配管４ａ，４ｂを介して接続されており、熱源機３ｂは、貯湯タンク２０ｂと水配管４ａ，４ｂを介して接続されており、熱源機３ｃは、貯湯タンク２０ｃと水配管４ａ，４ｂを介して接続されている。なお、図を簡素化するために熱源機と貯湯タンク間を接続する水配管４ａ，４ｂを１つの線で示しているが、図１と同様に接続されているものとする。
インタフェース部７´は、熱源機３ａ，３ｂ，３ｃと通信線６´で接続されているとともに、通信線６´によって貯湯タンク２０ａ，２０ｂ，２０ｃと直列に接続されている。 The heat source machine 3a is connected to the hot water storage tank 20a via the water pipes 4a and 4b, the heat source machine 3b is connected to the hot water storage tank 20b and the water pipes 4a and 4b, and the heat source machine 3c is connected to the hot water storage tank 3c. The tank 20c is connected to the water pipes 4a and 4b. In addition, although water piping 4a, 4b which connects between a heat source machine and a hot water storage tank is shown with one line in order to simplify a figure, it shall be connected similarly to FIG.
The interface unit 7 ′ is connected to the heat source devices 3 a, 3 b, 3 c through the communication line 6 ′, and is connected in series with the hot water storage tanks 20 a, 20 b, 20 c through the communication line 6 ′.

インタフェース部７´は、アドレス設定機能を有しており各熱源機３ａ，３ｂ，３ｃに対して、対応する貯湯タンクを明らかにする貯湯タンクアドレス［１］［２］［３］を割り振る。貯湯タンク側から出力される情報には、自身の貯湯タンクアドレスを含ませるようになっている。   The interface unit 7 ′ has an address setting function, and allocates hot water storage tank addresses [1] [2] [3] for clarifying the corresponding hot water storage tanks to the heat source devices 3 a, 3 b, 3 c. The information output from the hot water tank side includes its own hot water tank address.

これにより、インタフェース部７´が、各貯湯タンク２０ａ，２０ｂ，２０ｃの貯湯量検出部から検出された貯湯量の情報及び各電動弁から検出された開度信号を取得した場合に、取得した情報内に明示されている貯湯タンクアドレスを参照し、送信元となる貯湯タンク２０ａ，２０ｂ，２０ｃを識別する。そうすると、インタフェース部７´は、対応する送信先の熱源機３ａ，３ｂ，３ｃを簡便に識別でき、貯湯量の情報及び各電動弁から検出された開度信号を適切な熱源機３ａ，３ｂ，３ｃに対して送信できる。   Thereby, when interface part 7 'acquires the information on the amount of hot water detected from the hot water storage amount detection part of each hot water storage tank 20a, 20b, and 20c, and the opening signal detected from each electric valve, the acquired information The hot water storage tank addresses 20a, 20b, and 20c, which are transmission sources, are identified by referring to the hot water storage tank address specified in the inside. Then, the interface unit 7 ′ can easily identify the corresponding heat source devices 3 a, 3 b, 3 c of the transmission destination, and the appropriate heat source devices 3 a, 3 b, It can be transmitted to 3c.

１ 給湯システム
２ 貯湯ユニット
３，３ａ，３ｂ，３ｃ 熱源機
４ａ，４ｂ，４ｃ，４ｄ，４ｅ 水配管
５ａ，５ｂ 電気配線
６，６´ 通信線
７，７´ インタフェース部
８ 温度検出部
９ 電動弁
２０，２０ａ，２０ｂ，２０ｃ 貯湯タンク（密閉型）
２１ａ，２１ｂ・・・２１ｎ 貯湯量検出部
２２ 開放型タンク
３０ 制御部
３１ 第１接続部
３２ａ 第２接続部
３２ｂ 第３接続部
Ａ 温度センサ
Ｂ 水位センサ
DESCRIPTION OF SYMBOLS 1 Hot water supply system 2 Hot water storage unit 3, 3a, 3b, 3c Heat source machine 4a, 4b, 4c, 4d, 4e Water piping 5a, 5b Electric wiring 6, 6 'Communication line 7, 7' Interface part 8 Temperature detection part 9 Electric valve 20, 20a, 20b, 20c Hot water storage tank (sealed)
21a, 21b... 21n Hot water storage amount detection unit 22 Open-type tank 30 Control unit 31 First connection unit 32a Second connection unit 32b Third connection unit A Temperature sensor B Water level sensor

Claims (4)

熱源機と、
前記熱源機により加熱された湯を貯留する貯湯タンク内の貯湯量を検出する貯湯量検出手段と、
前記熱源機により加熱された湯を前記貯湯タンクに供給する経路上に設けられ、制御信号により前記貯湯タンクの上部に供給する流量が調整される電動弁と、
前記熱源機により加熱された湯を前記電動弁から前記貯湯タンクの下部に接続する給水配管へバイパスさせる水配管と、
前記熱源機に設けられ、前記貯湯量検出手段から検出された前記貯湯量の情報及び前記電動弁の開度信号に基づいて前記熱源機を制御する制御手段と、
前記貯湯量検出手段及び前記電動弁と電気配線で接続され、前記電気配線を介して、前記貯湯量検出手段により検出された前記貯湯量の情報及び前記電動弁の開度信号を入出力し、かつ、前記制御手段と通信線で接続され、前記電気配線を介して入出力された前記貯湯量の情報及び前記電動弁の開度信号を、前記通信線を介して前記制御手段と授受可能な信号に変換するインタフェース手段とを具備し、
前記制御手段は、前記インタフェース手段と前記通信線を介して情報の授受可能に接続できる第１接続手段を有する給湯システム。 A heat source machine,
Hot water storage amount detecting means for detecting the amount of hot water stored in a hot water storage tank for storing hot water heated by the heat source device;
An electric valve provided on a path for supplying hot water heated by the heat source unit to the hot water storage tank , and a flow rate to be supplied to the upper portion of the hot water storage tank by a control signal;
A water pipe for bypassing the hot water heated by the heat source machine to a water supply pipe connected to the lower part of the hot water storage tank from the electric valve;
Control means provided in the heat source unit, for controlling the heat source unit based on information on the hot water amount detected from the hot water storage amount detection unit and an opening signal of the electric valve;
The hot water storage amount detecting means and the electric valve are connected by electric wiring, and the hot water storage amount information detected by the hot water storage amount detecting means and the opening signal of the motor operated valve are input / output via the electric wiring, In addition, it is connected to the control means via a communication line, and the information on the amount of stored hot water and the opening signal of the motor-operated valve input / output via the electrical wiring can be exchanged with the control means via the communication line. Interface means for converting into signals,
The said control means is a hot water supply system which has the 1st connection means which can be connected to the said interface means through the said communication line so that transmission / reception of information is possible. 前記制御手段は、前記電気配線を介して前記貯湯量検出手段と情報の授受可能とする第２接続手段と、前記電気配線を介して前記電動弁と情報の授受可能とする第３接続手段とを具備する請求項１に記載の給湯システム。   The control means includes second connection means that allows information to be exchanged with the hot water storage amount detection means via the electric wiring, and third connection means that allows information to be exchanged with the electric valve via the electric wiring. The hot water supply system according to claim 1, comprising: 前記貯湯タンクに流入する湯の入口近傍に取り付けられ、前記貯湯タンクの入口の温度を検出し、検出された前記温度の情報を前記制御手段に出力する温度検出手段を具備し、
前記制御手段は、前記温度検出手段によって検出された前記温度に基づいて、前記熱源機を制御する請求項１または請求項２に記載の給湯システム。 It is attached in the vicinity of the inlet of hot water flowing into the hot water storage tank, comprises a temperature detection means for detecting the temperature of the inlet of the hot water storage tank and outputting the detected temperature information to the control means,
The hot water supply system according to claim 1 or 2, wherein the control unit controls the heat source unit based on the temperature detected by the temperature detection unit. 熱源機により加熱された湯を貯留する貯湯タンク内の貯湯量を検出する検出過程と、
前記熱源機により加熱された湯を前記貯湯タンクの上部に供給する経路上に設けられる電動弁の制御信号により、前記貯湯タンクに供給する流量が調整される過程と、
前記熱源機により加熱された湯を前記電動弁から前記貯湯タンクの下部に接続する給水配管へバイパスさせる過程と、
検出された前記貯湯量の情報及び前記電動弁の開度信号に基づいて、前記熱源機を前記熱源機側で制御する過程と、
電気配線を介して、前記検出過程により検出された前記貯湯量の情報及び前記電動弁の開度信号を入出力し、かつ、前記電気配線を介して入出力された前記貯湯量の情報及び前記電動弁の開閉信号を、通信線を介して授受可能な信号に変換する過程と
を有する給湯システムの制御方法。 A detection process for detecting the amount of hot water stored in a hot water storage tank for storing hot water heated by a heat source device;
The control signal of the electric valve provided hot water which is heated on a path for supplying the upper portion of the hot water storage tank by the heat source unit, an over extent the that flow rate supplied to the hot water storage tank is adjusted,
Bypassing hot water heated by the heat source machine from the motor-operated valve to a water supply pipe connected to the lower part of the hot water storage tank;
Based on the information of said detected amount of hot water storage and opening signal of the motor-operated valve, an over extent that controls the heat source apparatus at the heat source apparatus side,
Information on the amount of hot water detected by the detection process and the opening signal of the motor-operated valve are input / output via an electric wiring, and information on the amount of hot water input / output via the electric wiring and the information closing signal of the electric valve, the control method of the hot-water supply system with an over extent that converts via the communication line can exchange signals.
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