JP2004092934A - Heat pump hot-water supply machine with solar system - Google Patents

Heat pump hot-water supply machine with solar system Download PDF

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Publication number
JP2004092934A
JP2004092934A JP2002251209A JP2002251209A JP2004092934A JP 2004092934 A JP2004092934 A JP 2004092934A JP 2002251209 A JP2002251209 A JP 2002251209A JP 2002251209 A JP2002251209 A JP 2002251209A JP 2004092934 A JP2004092934 A JP 2004092934A
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Prior art keywords
heat pump
pump unit
water
hot water
storage tank
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JP3846385B2 (en
Inventor
Mutsuhiko Kamiya
神谷　睦彦
Shinji Yamawaki
山脇　信二
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat pump hot-water supply machine with a solar system capable of effectively utilizing energy and being easily controlled and having a simple structure. <P>SOLUTION: This hot-water supply machine has the solar system 3 provided with a collector 1 and a heat exchanger 2, a heat pump unit 4, and a hot-water storage tank 5. The hot-water storage tank 5 is provided with a high temperature water reflux port 7 from the heat pump unit 4 in an uppermost part 6 and the heat exchanger 2 in a lowermost part 8. It has a water feeding port 10 for the heat pump unit 4 in an intermediate part 9 of the hot-water storage tank 5 and a temperature sensor 11 in its vicinity. When the heat pump unit 4 is operated and the temperature sensor 11 detects water temperature higher than set temperature, operation of the heat pump unit 4 is stopped. Consequently, operation of the heat pump unit 4 can be controlled by a simple configuration, control of the whole system becomes easy, and use of inexpensive midnight electric power by a heat pump and effective use of solar heat energy can be achieved. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、エネルギーの有効利用を図ったソーラーシステム付きヒートポンプ式給湯機に関するものである。
【０００２】
【従来の技術】
太陽熱を利用して熱媒を加熱し、加熱された熱媒を貯湯タンク内の水と熱交換して貯湯タンク内の水を加熱し、貯湯タンク内の湯を利用する一方、日々の天候や、季節による太陽熱エネルギー利用の変動に対応するため、他のエネルギー供給源との併用を図った給湯システムも種々知られており、例えば、特開２００１−４２３０号公報には、太陽熱エネルギーと安価な深夜電力を利用した電気ヒーターとを併用した給湯システムが、開示されている。
【０００３】
一方、貯湯タンクの構造等についても、エネルギー有効利用の観点から、種々の工夫がなされ、例えば、上記特開２００１−４２３０号公報では、貯湯タンク内部を隔壁で複数の貯湯槽に分割し、得られる太陽熱エネルギーの日較変動、季節変動に対応した木目の細かな制御と管理をおこなう給湯システムが、提案されている。また、特開平５−３２２３０４号公報等に開示されるように、太陽熱エネルギーにより加温される貯湯タンクと通常の熱源により給湯を行なう給湯器を別個に備える給湯システムでは、両者の湯温を温度センサ等で検知して、前者の湯温が高いときのみ太陽熱エネルギーにより加温された湯を使用する等の細かな制御により、太陽熱エネルギーにより加温される貯湯タンクと通常の熱源により給湯を行なう給湯器との切り換えを行なう給湯システムの提案がされている。しかし、これらの給湯システムは、概して、エネルギーの有効利用を図るため、より高度で精密な制御に頼る結果、複数の貯湯槽を要する等、システム全体が、大掛かりで複雑なものとなりがちであった。
【０００４】
【発明が解決しようとする課題】
本発明は、上記事由に鑑みてなされたもので、その目的とするところは、エネルギー有効利用が図れる一方、構造が、シンプルで制御の容易なソーラーシステム付きヒートポンプ式給湯機を提供することにある。
【０００５】
【課題を解決するための手段】
上記課題を解決するために、請求項１に係るソーラーシステム付きヒートポンプ式給湯機にあっては、少なくとも、太陽熱エネルギーを集めるコレクターと二水式ソーラーシステム用熱交換機とを備えた二水式ソーラーシステムと、ヒートポンプユニットと、ヒートポンプユニット運転制御手段と、貯湯タンクと、を有するソーラーシステム付きヒートポンプ式給湯機であって、前記貯湯タンクが、その最上部に前記ヒートポンプユニットからの高温水還流口、最下部に前記二水式ソーラーシステム用熱交換機を備える一方、前記貯湯タンクの前記最上部と、前記最下部との中間部に、前記ヒートポンプユニットへの送水口、及び該送水口の近傍に前記ヒートポンプユニット運転制御手段に検知信号を送信可能な温度センサを有することを特徴とするものである。
【０００６】
請求項２に係るソーラーシステム付きヒートポンプ式給湯機にあっては、請求項１記載のソーラーシステム付きヒートポンプ式給湯機において、前記ヒートポンプユニット運転時に、前記温度センサが、所定の設定温度より高い水温を検知すると、この検知信号に基づいて前記ヒートポンプユニット運転制御手段により、前記ヒートポンプユニットの運転を停止し得るようにしたことを特徴とするものである。
【０００７】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づき説明する。なお、本発明のソーラーシステム付きヒートポンプ式給湯機は、下記の実施形態にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。ここで、図１は、本実施形態におけるソーラーシステム付きヒートポンプ式給湯機の概略を示す模式図である。
【０００８】
即ち、本発明のソーラーシステム付きヒートポンプ式給湯機の典型的実施形態としては、図１に示すように、少なくとも、太陽熱エネルギーを集めるコレクター１と二水式ソーラーシステム用熱交換機２とを備えた二水式ソーラーシステム３と、ヒートポンプユニット４と、例えば、５００リットルの容量を有する貯湯タンク５を一個有するものを例示できる。この場合、貯湯タンク５は、その最上部６に前記ヒートポンプユニット４から配管１７ｂを経由して還流してくる高温水のタンク５への高温水還流口７、最下部８に前記二水式ソーラーシステム用熱交換機２を備える一方、前記貯湯タンク５の前記最上部６と、前記最下部８との中間部９に、前記ヒートポンプユニット４へ、配管１７ａを経由して、タンク５の水を送水するための送水口１０、及び該送水口１０の近傍に温度センサ１１を有し、前記ヒートポンプユニット４の運転時に、前記温度センサ１１が、所定の設定温度より高い水温を検知すると、この検知信号に基づいてヒートポンプユニット運転制御手段１２により、前記ヒートポンプユニット４の運転を停止し得るように構成されている。
【０００９】
さらに、二水式ソーラーシステム３においては、貯湯タンク５の最下部８に配設された二水式ソーラーシステム用熱交換機２において、貯湯タンク５の最下部８近傍の冷水と熱交換を終えて、冷却された熱媒体は、上部に膨張タンク１３につながる分岐点１４を有する配管１５ａを経由して、循環ポンプ１６により配管１５ｂを経由して、コレクター１に送られる。この後、コレクター１で集められた太陽熱エネルギーで再度、温められた熱媒体は、配管１５ｃを経由して、二水式ソーラーシステム用熱交換機２に還流されることとなる。
【００１０】
一方、ヒートポンプユニット４においては、上記送水口１０から配管１７ａを経由して、ポンプ１８により、貯湯タンク５の水を汲み上げ、ヒートポンプの凝縮器である熱交換器１９において、熱交換して高温水とした後、配管１７ｂを経由して上記高温水還流口７から貯湯タンク５へ還流される。このとき、ヒートポンプユニット４の熱媒体は、前記熱交換器１９において、貯湯タンク５の水と熱交換して高温水とした後、自らは冷却、液化され、高圧ガスから高圧液となる。この液化した常温高圧の液は、膨張弁２０により急激に減圧され、蒸発器２１の中で再度熱交換され、低圧ガスへと変化する。この熱媒体が、蒸発する際に、蒸発潜熱により、大量の熱量を吸収することとなる。この後、熱媒体はコンプレッサー２２で圧縮され、高温、高圧となり、貯湯タンク５から汲み上げた水と再度熱交換可能となる。
【００１１】
かかる本実施形態のソーラーシステム付きヒートポンプ式給湯機は、以下のように運転される。
【００１２】
▲１▼安価な深夜電力を使用して、ヒートポンプユニット４で高温に沸きあげた高温水（湯）は、配管１７ｂを経由して貯湯タンク５に還流し、その最上部６の高温水還流口７から貯湯タンク５に戻される。一方、中間部９の送水口１０から配管１７ａを経由して、タンク５の水が、ポンプ１８により、ヒートポンプユニット４へ送水される。この場合、貯湯タンク５内部では、この高温水は、貯湯タンク５内に既に存在する低温水よりも比重が小さいため、この低温水と交じり合うことなく、貯湯タンク５内の低温水の上に積層することなる。この結果、貯湯タンク５は、その内部に隔壁等のない一缶式のものでありながら、事実上、上部の高温貯湯部２６と下部の低温貯水部２５の二層構造を有するタンクとして機能することとなる。
【００１３】
▲２▼ポンプ１８による上記循環により、ヒートポンプユニット４から還流した高温水（湯）が、貯湯タンク５の上部で充分積層し、送水口１０の近傍に設けた温度センサ１１が、所定の設定温度より高い水温を検知（即ち、貯湯タンク５上部の前記高温貯湯部２６の下端部が降下し、温度センサ１１の位置まで到達したことを検知）すると、この検知信号に基づいてヒートポンプユニット運転制御手段１２により、前記ヒートポンプユニット４の運転を停止することとなる。したがって、このように、温度センサ１１を、貯湯タンク５の中間部９の送水口１０の近傍に配設することにより、温度センサ１１の配設位置が貯湯タンク５の前記高温貯湯部２６と前記低温貯水部２５の境界の下限を定めることとなる。例えば、本実施形態における５００リットルの容量を有する貯湯タンク５において、その最上部６から３００リットルの容量に対応する位置に温度センサ１１を配設すると、この場合の高温貯湯部２６は、最大３００リットルの容量を有し、このときの低温貯水部２５の容量は、２００リットルとなる。
【００１４】
▲３▼上部の高温貯湯部２６から、電磁混合弁２３を経由して、給湯されると、最下部８近傍の給水口２４から給湯量と同量の水道水が、低温貯水部２５に補給される。このようにして、高温水（湯）を消費するに従い、高温貯湯部２６の下端部は、貯湯タンク５内部において、上方に押し上げられる。この場合において、温度センサ１１は、低温貯水部２５内に入るため、このとき、温度センサ１１が、所定の設定温度より低い水温を検知（即ち、貯湯タンク５上部の前記高温貯湯部２６の下端部が上昇し、温度センサ１１の位置を通過したことを検知）すると、この検知信号に基づいてヒートポンプユニット運転制御手段１２により、前記ヒートポンプユニット４の運転を再開するように構成する実施形態も当然可能である。
【００１５】
▲４▼一方、日中、二水式ソーラーシステム３において取り込んだ太陽熱エネルギーは、貯湯タンク５の最下部８に配設された二水式ソーラーシステム用熱交換機２において、貯湯タンク５の最下部８近傍の冷水を温めるのに使用され、前記低温貯水部２５の水温が上昇する。この結果、ヒートポンプユニット４を運転した際、低温貯水部２５より汲み上げた冷水を所定の温度（所望の湯温）まで温めるために不足分の熱エネルギーのみをヒートポンプユニット４から補償することとなるため、トータル的には、ソーラーシステム３により取り込める太陽熱エネルギーを最大限有効活用し得る一方、ヒートポンプユニット４により、安価な深夜電力を有効活用して、ソーラーシステム３により取り込める太陽熱エネルギーの日較変動、季節変動を効率的に吸収、補填できることとなる。
【００１６】
このように、本発明のソーラーシステム付きヒートポンプ式給湯機は、高温水（湯）を得るに際して、ソーラーシステム３により取り込める太陽熱エネルギーを最大限有効活用する一方、その不足分の熱エネルギーを、安価な深夜電力を有効活用したヒートポンプユニット４から補償し、同時に、ソーラーシステム３により取り込める太陽熱エネルギーの日較変動、季節変動をも効率的に吸収、補填しようとするものである。
【００１７】
また、貯湯タンクを一個のみ有し、事実上、温度センサ一個のみで前記ヒートポンプユニットのオン／オフ等の運転制御が容易にできるという比較的シンプルな構成を有するため、結果的に、システム全体の制御が容易にできるという特徴を有する。
【００１８】
【発明の効果】
以上のように、請求項１および請求項２に係るソーラーシステム付きヒートポンプ式給湯機にあっては、少なくとも、太陽熱エネルギーを集めるコレクターと二水式ソーラーシステム用熱交換機とを備えた二水式ソーラーシステムと、ヒートポンプユニットと、貯湯タンクと、を有するソーラーシステム付きヒートポンプ式給湯機であって、前記貯湯タンクが、その最上部に前記ヒートポンプユニットからの高温水還流口、最下部に前記二水式ソーラーシステム用熱交換機を備える一方、前記貯湯タンクの前記最上部と、前記最下部との中間部に、前記ヒートポンプユニットへの送水口、及び該送水口の近傍に温度センサを有し、前記ヒートポンプユニット運転時に、前記温度センサが、所定の設定温度より高い水温を検知すると、前記ヒートポンプユニットの運転を停止し得るようにしたことを特徴とするので、前記ソーラーシステムで太陽熱エネルギーを有効活用しつつ、ヒートポンプにより、安価な深夜電力を有効活用して、上記ソーラーシステムにより取り込める太陽熱エネルギーの日較変動、季節変動を効率的に吸収、補填できるのみならず、貯湯タンクを一個のみ有し、事実上、温度センサ一個のみで前記ヒートポンプユニットの運転の停止を制御し得るという比較的シンプルな構成により、結果的に、システム全体の制御が容易にできるという優れた効果を奏する。
【図面の簡単な説明】
【図１】本実施形態におけるソーラーシステム付きヒートポンプ式給湯機の概略を示す模式図である。
【符号の説明】
１　　　コレクター
２　　　二水式ソーラーシステム用熱交換機
３　　　二水式ソーラーシステム
４　　　ヒートポンプユニット
５　　　貯湯タンク
６　　　最上部（貯湯タンク５）
７　　　高温水還流口
８　　　最下部（貯湯タンク５）
９　　　中間部（貯湯タンク５）
１０　　　送水口
１１　　　温度センサ
１２　　　ヒートポンプユニット運転制御手段
１３　　　膨張タンク
１４　　　分岐点（配管１５ａ）
１５ａ　　配管
１５ｂ　　配管
１５ｃ　　配管
１６　　　循環ポンプ
１７ａ　　配管
１７ｂ　　配管
１８　　　ポンプ
１９　　　熱交換器
２０　　　膨張弁
２１　　　蒸発器
２２　　　コンプレッサー
２３　　　電磁混合弁
２４　　　給水口
２５　　　低温貯水部
２６　　　高温貯湯部
２７　　　逃がし弁
２８　　　減圧弁
２９　　　給水系
３０　　　風呂[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a heat pump type water heater with a solar system for effective use of energy.
[0002]
[Prior art]
The heat medium is heated using solar heat, the heated heat medium exchanges heat with the water in the hot water storage tank to heat the water in the hot water storage tank, and while using the hot water in the hot water storage tank, In order to cope with fluctuations in the use of solar heat energy due to seasons, various types of hot water supply systems that are used in combination with other energy supply sources are also known. For example, Japanese Patent Application Laid-Open Publication No. A hot water supply system using an electric heater that uses midnight power is disclosed.
[0003]
On the other hand, with respect to the structure of the hot water storage tank and the like, various measures are taken from the viewpoint of effective use of energy. For example, in JP-A-2001-4230, the inside of the hot water storage tank is divided into a plurality of hot water storage tanks by partition walls. There has been proposed a hot water supply system that performs fine-grained control and management of wood grain corresponding to daily and seasonal fluctuations of solar thermal energy. Further, as disclosed in Japanese Patent Application Laid-Open No. 5-322304, etc., in a hot water supply system that separately includes a hot water storage tank heated by solar thermal energy and a water heater that supplies hot water with a normal heat source, both hot water temperatures are set to the temperature. Water is supplied by a hot water storage tank heated by solar thermal energy and a normal heat source by fine control such as using hot water heated by solar thermal energy only when the former hot water temperature is detected by a sensor or the like. There has been proposed a hot water supply system that performs switching with a hot water supply device. However, these hot water supply systems generally rely on more sophisticated and precise control for effective use of energy, and as a result, the entire system tends to be large and complicated, such as requiring multiple hot water tanks. .
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a heat pump type water heater with a solar system having a simple and easy-to-control structure, while effectively utilizing energy. .
[0005]
[Means for Solving the Problems]
In order to solve the above problem, a heat pump type water heater with a solar system according to claim 1 has a two-water solar system including at least a collector for collecting solar thermal energy and a heat exchanger for a two-water solar system. A heat pump type water heater with a solar system, comprising: a heat pump unit; a heat pump unit operation control means; and a hot water storage tank, wherein the hot water storage tank has a hot water recirculation port from the heat pump unit at an uppermost portion thereof. A heat exchanger for a two-water solar system is provided at a lower portion, while a water supply port to the heat pump unit is provided at an intermediate portion between the uppermost portion and the lowermost portion of the hot water storage tank, and the heat pump is provided near the water supply port. It has a temperature sensor capable of transmitting a detection signal to the unit operation control means. It is an.
[0006]
In the heat pump water heater with a solar system according to claim 2, in the heat pump water heater with a solar system according to claim 1, the temperature sensor detects a water temperature higher than a predetermined set temperature during the operation of the heat pump unit. Upon detection, the operation of the heat pump unit can be stopped by the heat pump unit operation control means based on the detection signal.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The heat pump type water heater with a solar system of the present invention is not limited to the following embodiment, and various changes can be made without departing from the gist of the present invention. Here, FIG. 1 is a schematic diagram showing an outline of a heat pump water heater with a solar system in the present embodiment.
[0008]
That is, as a typical embodiment of a heat pump water heater with a solar system according to the present invention, as shown in FIG. 1, a heat pump water heater having at least a collector 1 for collecting solar thermal energy and a heat exchanger 2 for a two-water solar system is provided. A water solar system 3, a heat pump unit 4, and a hot water storage tank 5 having a capacity of, for example, 500 liters can be exemplified. In this case, the hot water storage tank 5 has a high-temperature water recirculation port 7 to the high-temperature water tank 5 circulating from the heat pump unit 4 via the pipe 17b at the uppermost part 6 and the two-water type solar cell at the lowermost part 8. While the system heat exchanger 2 is provided, the water in the tank 5 is supplied to the heat pump unit 4 via the pipe 17a to the intermediate portion 9 between the uppermost portion 6 and the lowermost portion 8 of the hot water storage tank 5. And a temperature sensor 11 near the water supply port 10. When the temperature sensor 11 detects a water temperature higher than a predetermined set temperature during operation of the heat pump unit 4, the detection signal The operation of the heat pump unit 4 can be stopped by the heat pump unit operation control means 12 based on the above.
[0009]
Further, in the two-water solar system 3, the heat exchange with the cold water in the vicinity of the lowermost part 8 of the hot water storage tank 5 is completed in the heat exchanger 2 for the two-water solar system arranged in the lowermost part 8 of the hot water storage tank 5. The cooled heat medium is sent to the collector 1 via a pipe 15a having a branch point 14 connected to the expansion tank 13 at an upper portion, and via a pipe 15b by a circulation pump 16. Thereafter, the heat medium heated again by the solar heat energy collected by the collector 1 is returned to the heat exchanger 2 for a two-water solar system via the pipe 15c.
[0010]
On the other hand, in the heat pump unit 4, the water in the hot water storage tank 5 is pumped up from the water supply port 10 via the pipe 17a by the pump 18, and heat is exchanged in the heat exchanger 19 which is a condenser of the heat pump. Then, the hot water is recirculated from the high-temperature water recirculation port 7 to the hot water storage tank 5 via the pipe 17b. At this time, the heat medium of the heat pump unit 4 is heat-exchanged with the water in the hot water storage tank 5 in the heat exchanger 19 to become high-temperature water, and then cooled and liquefied by itself to become a high-pressure liquid from a high-pressure gas. The liquefied room-temperature and high-pressure liquid is rapidly reduced in pressure by the expansion valve 20, heat exchanges again in the evaporator 21, and changes to a low-pressure gas. When the heat medium evaporates, a large amount of heat is absorbed by the latent heat of evaporation. Thereafter, the heat medium is compressed by the compressor 22, becomes high temperature and high pressure, and becomes heat exchangeable again with water pumped from the hot water storage tank 5.
[0011]
The heat pump water heater with the solar system of the present embodiment operates as follows.
[0012]
(1) High-temperature water (hot water) boiled to a high temperature by the heat pump unit 4 using inexpensive midnight electric power is returned to the hot-water storage tank 5 via the pipe 17b, and the high-temperature water return port at the top 6 thereof 7 returns to the hot water storage tank 5. On the other hand, the water in the tank 5 is sent to the heat pump unit 4 by the pump 18 from the water inlet 10 of the intermediate section 9 via the pipe 17a. In this case, in the hot water storage tank 5, the high-temperature water has a lower specific gravity than the low-temperature water already existing in the hot water storage tank 5. It will be laminated. As a result, while the hot water storage tank 5 is a one-can type having no partition wall or the like inside, the hot water storage tank 5 effectively functions as a tank having a two-layer structure of the upper hot water storage section 26 and the lower cold water storage section 25. It will be.
[0013]
(2) Due to the above-mentioned circulation by the pump 18, high-temperature water (hot water) refluxed from the heat pump unit 4 is sufficiently laminated on the upper part of the hot water storage tank 5, and the temperature sensor 11 provided near the water supply port 10 detects a predetermined temperature. When a higher water temperature is detected (that is, it is detected that the lower end of the high-temperature hot water storage section 26 at the top of the hot water storage tank 5 has dropped and has reached the position of the temperature sensor 11), the heat pump unit operation control means based on this detection signal. According to 12, the operation of the heat pump unit 4 is stopped. Therefore, by disposing the temperature sensor 11 in the vicinity of the water supply port 10 in the intermediate portion 9 of the hot water storage tank 5 in this way, the disposition position of the temperature sensor 11 is the same as that of the high-temperature hot water storage section 26 of the hot water storage tank 5. The lower limit of the boundary of the low-temperature water storage unit 25 will be determined. For example, in the hot water storage tank 5 having a capacity of 500 liters in the present embodiment, if the temperature sensor 11 is disposed at a position corresponding to a capacity of 300 liters from the uppermost portion 6, the high temperature hot water storage section 26 in this case will have a maximum of 300 liters. The capacity of the low-temperature water storage unit 25 at this time is 200 liters.
[0014]
(3) When hot water is supplied from the upper high-temperature hot water storage section 26 via the electromagnetic mixing valve 23, the same amount of tap water as the amount of hot water is supplied to the low-temperature water storage section 25 from the water supply port 24 near the lowermost portion 8. Is done. In this way, as hot water (hot water) is consumed, the lower end of the high-temperature hot water storage section 26 is pushed up inside the hot water storage tank 5. In this case, since the temperature sensor 11 enters the low-temperature water storage section 25, at this time, the temperature sensor 11 detects a water temperature lower than a predetermined set temperature (that is, the lower end of the high-temperature water storage section 26 above the hot water storage tank 5). In this embodiment, the heat pump unit operation control means 12 restarts the operation of the heat pump unit 4 based on the detection signal when it is detected that the unit has risen and passed the position of the temperature sensor 11). It is possible.
[0015]
{Circle around (4)} On the other hand, during the daytime, the solar thermal energy taken in the two-water solar system 3 is supplied to the lowermost part of the hot water storage tank 5 in the two-water solar system heat exchanger 2 disposed at the lowermost part 8 of the hot water storage tank 5. 8 is used to warm the cold water in the vicinity, and the water temperature of the low-temperature water storage section 25 rises. As a result, when the heat pump unit 4 is operated, only the insufficient heat energy is compensated from the heat pump unit 4 in order to warm the cold water pumped from the low-temperature water storage unit 25 to a predetermined temperature (desired hot water temperature). In total, the solar thermal energy that can be captured by the solar system 3 can be effectively used to the utmost, while the heat pump unit 4 can effectively utilize inexpensive midnight power, and the solar thermal energy that can be captured by the solar system 3 can have daily fluctuations and seasonal changes. Fluctuations can be efficiently absorbed and compensated for.
[0016]
As described above, the heat pump water heater with a solar system of the present invention, when obtaining high-temperature water (hot water), makes maximum use of the solar thermal energy that can be captured by the solar system 3 while using the insufficient thermal energy as an inexpensive heat. It compensates from the heat pump unit 4 that makes effective use of midnight power, and at the same time, efficiently absorbs and compensates for daily and seasonal variations in solar thermal energy that can be captured by the solar system 3.
[0017]
In addition, since it has a relatively simple configuration in which only one hot water storage tank is used and operation control such as turning on / off the heat pump unit can be easily performed with only one temperature sensor, the overall system It has the feature that it can be easily controlled.
[0018]
【The invention's effect】
As described above, in the heat pump water heater with a solar system according to claim 1 and claim 2, a two-water solar system including at least a collector for collecting solar thermal energy and a heat exchanger for a two-water solar system. A heat pump water heater with a solar system having a system, a heat pump unit, and a hot water storage tank, wherein the hot water storage tank has a hot water recirculation port from the heat pump unit at the top, and the two-water type at the bottom. A heat exchanger for a solar system, a water supply port to the heat pump unit at an intermediate portion between the uppermost part and the lowermost part of the hot water storage tank, and a temperature sensor near the water supply port; During operation of the unit, when the temperature sensor detects a water temperature higher than a predetermined set temperature, Since the operation of the pump unit can be stopped, the solar heat energy can be effectively utilized by the solar system while the inexpensive midnight power can be effectively utilized by the heat pump, and the solar thermal energy can be captured by the solar system. Not only can efficiently absorb and compensate for daily fluctuations and seasonal fluctuations, but also has only one hot water storage tank, and in fact, the stop of the heat pump unit can be controlled with only one temperature sensor. As a result, an excellent effect that control of the entire system can be easily performed is achieved.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an outline of a heat pump water heater with a solar system according to an embodiment.
[Explanation of symbols]
Reference Signs List 1 collector 2 heat exchanger for two-water solar system 3 two-water solar system 4 heat pump unit 5 hot water storage tank 6 top (hot water storage tank 5)
7 High-temperature water return port 8 Lowermost part (hot water storage tank 5)
9 middle part (hot water storage tank 5)
Reference Signs List 10 water supply port 11 temperature sensor 12 heat pump unit operation control means 13 expansion tank 14 branch point (pipe 15a)
15a pipe 15b pipe 15c pipe 16 circulation pump 17a pipe 17b pipe 18 pump 19 heat exchanger 20 expansion valve 21 evaporator 22 compressor 23 electromagnetic mixing valve 24 water supply port 25 low-temperature water storage section 26 high-temperature hot water storage section 27 relief valve 28 pressure reducing valve 29 water supply System 30 bath

Claims (2)

少なくとも、太陽熱エネルギーを集めるコレクターと二水式ソーラーシステム用熱交換機とを備えた二水式ソーラーシステムと、ヒートポンプユニットと、ヒートポンプユニット運転制御手段と、貯湯タンクと、を有するソーラーシステム付きヒートポンプ式給湯機であって、前記貯湯タンクが、その最上部に前記ヒートポンプユニットからの高温水還流口、最下部に前記二水式ソーラーシステム用熱交換機を備える一方、前記貯湯タンクの前記最上部と、前記最下部との中間部に、前記ヒートポンプユニットへの送水口、及び該送水口の近傍に前記ヒートポンプユニット運転制御手段に検知信号を送信可能な温度センサを有することを特徴とするソーラーシステム付きヒートポンプ式給湯機。At least a heat pump hot water supply with a solar system including a two-water solar system including a collector that collects solar thermal energy and a heat exchanger for a two-water solar system, a heat pump unit, a heat pump unit operation control unit, and a hot water storage tank. The hot water storage tank is provided with a high-temperature water recirculation port from the heat pump unit at the top, and the two-water solar system heat exchanger at the bottom, while the top of the hot water storage tank, A heat pump type with a solar system, comprising a water inlet to the heat pump unit at an intermediate part with the lowermost part, and a temperature sensor near the water inlet capable of transmitting a detection signal to the heat pump unit operation control means. Water heater. 前記ヒートポンプユニット運転時に、前記温度センサが、所定の設定温度より高い水温を検知すると、この検知信号に基づいて前記ヒートポンプユニット運転制御手段により、前記ヒートポンプユニットの運転を停止し得るようにしたことを特徴とする請求項１記載のソーラーシステム付きヒートポンプ式給湯機。During the operation of the heat pump unit, when the temperature sensor detects a water temperature higher than a predetermined set temperature, the heat pump unit operation control means can stop the operation of the heat pump unit based on the detection signal. The heat pump water heater with a solar system according to claim 1.
JP2002251209A 2002-08-29 2002-08-29 Heat pump water heater with solar system Expired - Fee Related JP3846385B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011237138A (en) * 2010-05-12 2011-11-24 Yazaki Corp Absorption air conditioning hot water supply system
CN102748878A (en) * 2012-07-27 2012-10-24 刘旭 Solar energy preferential utilization linkage arrangement between a plurality of heat sources and solar system
CN103913002A (en) * 2014-03-13 2014-07-09 昆明一品阳光节能工程有限公司 Solar energy and heat pump combined hot water system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011237138A (en) * 2010-05-12 2011-11-24 Yazaki Corp Absorption air conditioning hot water supply system
CN102748878A (en) * 2012-07-27 2012-10-24 刘旭 Solar energy preferential utilization linkage arrangement between a plurality of heat sources and solar system
CN103913002A (en) * 2014-03-13 2014-07-09 昆明一品阳光节能工程有限公司 Solar energy and heat pump combined hot water system

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