JP2014037963A - Solar heat hot water supply system - Google Patents

Solar heat hot water supply system Download PDF

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JP2014037963A
JP2014037963A JP2013221683A JP2013221683A JP2014037963A JP 2014037963 A JP2014037963 A JP 2014037963A JP 2013221683 A JP2013221683 A JP 2013221683A JP 2013221683 A JP2013221683 A JP 2013221683A JP 2014037963 A JP2014037963 A JP 2014037963A
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hot water
heat
solar
water
pump
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Hisao Koizumi
尚夫 小泉
Katsuro Kuroyasu
勝郎 黒保
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Enetecs Kk
エナテックス株式会社
Toyo Solar System Kenkyusho:Kk
株式会社東洋ソーラーシステム研究所
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PROBLEM TO BE SOLVED: To provide a solar heat hot water supply system including a backup heat source of high energy saving rate.SOLUTION: A heat pump warm water system 15 is incorporated as a backup heat source in a solar heat hot water supply system of a type where hot water is returned to an upper portion of a hot water storage tank while making a circulation flow rate to a heat collector variable, so that the hot water heated by a solar heat collector 1 is accumulated in layers from the upper portion of the hot water storage tank 2 while keeping a layered state so that it is not stirred with water of a lower portion.

Description

本発明は太陽熱利用の温水システムが天候によって集熱できたり、できなかったりするのでバックアップ熱源が必要になるが、バックアップ熱源を含めた太陽熱利用の温水システムが取り扱い易く、省エネルギー率が高く、しかも低コスト並びに安全性を重視した太陽熱給湯システムに関する。   In the present invention, a solar water-based hot water system may or may not be able to collect heat depending on the weather, so a backup heat source is required, but a solar-heated hot water system including a backup heat source is easy to handle, has a high energy saving rate, and is low. The present invention relates to a solar hot water supply system that places importance on cost and safety.
住宅用エネルギー消費の中で最も負荷の大きい用途の一つである給湯はその大部分は比較的低温度のエネルギー利用であり、年間を通して利用される用途なので太陽熱が容易にまた経済性にも適う利用ができるものと期待された。再生可能エネルギー利用の中で太陽熱利用給湯システムは最も実現が容易で且つ省エネルギー効果も大きいと考えられ、各種の公的助成なども行われてきた。しかし、我が国では1983年ころをピークにその後、太陽熱温水システムの年間販売数は現在に至るまでほぼ減少傾向をたどっている。太陽熱以外の給湯用エネルギー源は都市ガスとLPG及び石油など燃焼系が主要な熱源であるが、これら燃焼系のシステムは安全性の問題が最も重要な課題であり、各種センサーや電子制御系を多用することによって、利便性、安全性が改良されてきた。しかし浴槽自動湯張りなど利便性が高くなると反面、制御が複雑になり、太陽熱温水システムとの連動も複雑になるので、バックアップ熱源としては却って利用し難くなっている。またガス湯沸かし器など燃焼系の給湯器をバックアップ熱源に用いると太陽熱利用と安全性のレベルが違い過ぎて危険性が増すという不都合もあった。またバックアップの熱源との2重設備になるという不都合もある。2重設備になって使い勝手が悪いことが太陽熱温水システムの販売数が期待されたようには伸びなく、むしろ減少していった背景と考えられる。2重設備になって使い勝手が悪い点をなくしようと太陽熱はガス給湯器などに入る給水の予熱に利用するような使い方も多くなされている。しかしこの方法は太陽熱で温めた湯を出湯するとき常に燃焼式給湯器の中を通過することになるので熱ロスが増大するし、太陽熱を利用しているという実感もわかないという不都合もある。   Hot water supply, one of the most demanding applications in residential energy consumption, is mostly used at relatively low temperatures and is used throughout the year, so solar heat is easy and economical. Expected to be usable. Among the renewable energy uses, the solar hot water supply system is considered to be the easiest to implement and the energy saving effect is great, and various public subsidies have been provided. However, after peaking around 1983 in Japan, the annual number of solar hot water systems sold has been on a declining trend until now. The main energy sources for hot water supply other than solar heat are city gas, LPG, and oil, which are the main heat sources. However, safety issues are the most important issues in these combustion systems. Various sensors and electronic control systems are installed. Convenience and safety have been improved by frequent use. However, while convenience such as automatic bathing in a bathtub becomes higher, the control becomes complicated and the interlocking with the solar hot water system becomes complicated, making it difficult to use as a backup heat source. In addition, when a combustion water heater such as a gas water heater is used as a backup heat source, there is an inconvenience that the safety level is too different from the safety level and the danger increases. There is also the inconvenience of having a double facility with a backup heat source. It is thought that the fact that the number of solar hot water systems sold was not as expected, but rather decreased, because it became a double facility and was unusable. Solar heat is often used to preheat water that enters gas water heaters, etc., in order to eliminate the disadvantages of using double facilities. However, this method has the inconvenience that when the hot water heated by solar heat is discharged, it always passes through the combustion type water heater, so that heat loss is increased and the actual feeling that solar heat is used is not understood.
最近は都市住宅の安全性の点でヒートポンプ給湯器が注目されて、年々普及が進んでいる。ヒートポンプ給湯器は太陽熱利用システムと安全性のレベルが同一と考えられ、その点から太陽熱温水システムのバックアップ熱源に適していると考えられる。大気熱源ヒートポンプは太陽熱で温められた大気を熱源とする広い意味での太陽熱利用であり、太陽集熱で十分高温が得られるときに何も大気に拡散してしまった太陽熱を、電力を消費して汲み上げる必要があろうかとも考えられる。そういう点から考えても太陽熱温水システムのバックアップ熱源にヒートポンプ給湯器が適しているのはいわば当然のことと考えられる。しかしヒートポンプ給湯器には電力負荷の昼夜平準化のために安く設定されている深夜電力が利用されているので、太陽熱温水システムのバックアップ熱源として利用しようとすると朝、太陽日射が強くなって集熱が始まるときには夜のうちにすでに貯湯槽がヒートポンプで沸かした湯がいっぱいになっているので集熱するにはもう一つ貯湯槽が必要になるという不都合がある。またもう一つ貯湯槽を設置してそちらに太陽集熱で沸かした湯を蓄えても、深夜電力ですでに湯が沸いているので、太陽熱で沸かした湯は次のヒートポンプで沸かす湯の予熱として利用するしか方法がない。しかしそのようにヒートポンプへの給水を予熱するとヒートポンプの成績係数が悪くなるので、太陽熱はあまり有効には活用されないという問題も生じる。また貯湯槽も2つ使う完全な2重設備になるという不都合も免れない。   Recently, heat pump water heaters have attracted attention in terms of the safety of urban houses, and are spreading year by year. The heat pump water heater is considered to have the same level of safety as the solar heat utilization system. From this point of view, it is considered to be suitable as a backup heat source for the solar water heating system. Atmospheric heat source heat pump is the use of solar heat in a broad sense, using the atmosphere heated by solar heat as the heat source, and consumes the solar heat that has diffused into the atmosphere when sufficient temperature is obtained by solar heat collection. It may be necessary to pump up. From this point of view, it is natural that a heat pump water heater is suitable as a backup heat source for a solar hot water system. However, heat pump water heaters use midnight power that is cheaply set for leveling the power load day and night, so if you try to use it as a backup heat source for a solar water heating system, in the morning the solar radiation will become stronger and heat collection When it starts, the hot water boiled by the heat pump is already full in the night, so another hot water tank is necessary to collect heat. In addition, even if another hot water storage tank is installed and hot water boiled by solar heat collection is stored there, the hot water already boiled at midnight power, so the hot water boiled by solar heat is preheated by the next heat pump. There is only a method to use as. However, preheating the water supply to the heat pump in such a manner deteriorates the coefficient of performance of the heat pump, which causes a problem that solar heat is not used effectively. Also, the inconvenience of having a complete double facility that uses two hot water tanks is inevitable.
特開2007−198708号公報JP 2007-198708 A
太陽熱温水システムのバックアップ熱源として要求されることは貯湯槽の湯量が減少してきて湯が出なくなる、いわゆる湯切れが起こる前に追加湯沸かしが短時間でできる給湯器が求められる。湯切れの不安がなく、いつでも湯が使える都市ガスあるいはLPGのガス瞬間湯沸かし器が太陽熱給湯システムのバックアップ熱源として利用されることが多い理由である。しかし燃焼式の給湯器を太陽熱温水システムのバックアップ熱源として利用すると、前述した通り安全性のレベルの異なるシステムの組み合わせという不都合、また2重設備になる煩雑さや、また使い勝手をよくするように太陽熱は燃焼式給湯器の給水予熱として利用すると太陽熱が必ずしも有効に活用されないという問題がある。また安全性のレベルがほぼ同一と考えられるヒートポンプ給湯器をバックアップ熱源にしても深夜電力利用のヒートポンプでは前述のような不都合があった。   What is required as a backup heat source for a solar hot water system is a water heater that can perform additional hot water heating in a short time before the so-called hot water shortage occurs. This is the reason why city gas or LPG gas instant water heaters that can use hot water anytime without worrying about running out of hot water are often used as a backup heat source for solar water heating systems. However, if a combustion-type water heater is used as a backup heat source for a solar water heating system, as mentioned above, solar heat can be combined with the inconvenience of a combination of systems with different levels of safety, the complexity of double equipment, and the ease of use. There is a problem that solar heat is not always effectively used when used as preheating water for a combustion water heater. Further, even if a heat pump water heater that is considered to have almost the same safety level is used as a backup heat source, the heat pump using midnight power has the disadvantages described above.
深夜電力利用の温水器は前述のように太陽熱利用温水システムのバックアップ熱源として不都合があるので、電気料金が割高でも昼間電力を利用した効率の良いヒートポンプ温水システムで問題を解決することも考えられる。図1は従来の一般的な不凍液集熱方式の太陽熱温水システムを示している。図1においてこのシステムに昼間電力利用のヒートポンプ温水システムを組み込んで、1日の太陽集熱が終了する時刻に近付いたころに、貯湯槽の湯量が不足していて例えば湯温が35℃で入浴には低すぎるようなときにヒートポンプ温水器を投入して50℃または60℃に昇温させる場合、ヒートポンプの成績係数は水から沸かす場合に比べて低くなるという不都合がある。またヒートポンプで昇温させる場合、時間がかかり、湯を直に使いたいときに間に合わないという不都合もある。ヒートポンプ投入後に短時間で所定温度の湯を出湯できることが要望される。また図1に示すような従来の一般的な太陽熱温水システムでは朝、日射が強くなって太陽集熱が始まっても貯湯槽の湯温はすぐには上がってこないので、高い温度の湯を沸かせるだけの日射強度があるにかかわらず太陽集熱で沸かした湯が使えないという不都合もある。従来の太陽熱温水システムにはこの様な多くの不都合があり、太陽熱利用が我が国においては伸び悩んでいる理由と考えられる。本提案は従来の太陽熱温水システムのこの様な多くの不具合がないバックアップ熱源を組み込んだ太陽熱温水システムを考案して、太陽熱利用を促進させようとするものである。   As described above, a water heater using midnight power is inconvenient as a backup heat source for a solar-powered hot water system. Therefore, it is conceivable to solve the problem with an efficient heat pump hot water system using daytime power even if the electricity bill is expensive. FIG. 1 shows a conventional general antifreeze liquid solar water heating system. In Fig. 1, a heat pump hot water system that uses daytime power is incorporated into this system, and when the day of solar heat collection nears the end of the day, the amount of hot water in the hot water tank is insufficient, for example, bathing at a hot water temperature of 35 ° C. When the temperature is too low and the temperature is raised to 50 ° C. or 60 ° C., the coefficient of performance of the heat pump is lower than when boiling from water. Moreover, when it heats up with a heat pump, it takes time and there also exists a problem that it is not in time when wanting to use hot water directly. It is desired that hot water at a predetermined temperature can be discharged in a short time after the heat pump is turned on. In addition, in the conventional general solar water heating system as shown in Fig. 1, the hot water in the hot water tank does not rise immediately even if the solar radiation starts in the morning and the solar heat collection starts. There is also the inconvenience that hot water boiled by solar heat collection cannot be used regardless of the solar radiation intensity. The conventional solar water heating system has many disadvantages like this, and it is considered that solar heat utilization is sluggish in Japan. This proposal is to devise a solar water heating system that incorporates a backup heat source that does not have such many problems of the conventional solar water heating system, and to promote the use of solar heat.
図1に示すような従来の一般的な太陽熱温水システムにおいては前述のように日射が強くなって太陽集熱が始まっても朝のうちは貯湯槽の湯温はすぐには上がらず、太陽熱を利用できないという不具合があった。この様な不具合がなく朝に集熱が始まるとすぐに太陽熱で温められた湯が使えるシステムを図2に示す。図2において1は太陽集熱器、2は貯湯槽を示し、8は集熱板に取り付けたサーミスタなどの温度センサーで、集熱器に日射が当たり、集熱板温度が上がってセンサー8が所定温度、例えば45℃以上になると5で示す循環ポンプが起動して、貯湯槽の底部からの水が循環ポンプ5を経て集熱器に入り、集熱器で暖められた湯が貯湯槽上部に戻る仕組みになっている。循環ポンプ5はセンサー8からの信号で回転数が制御できる回転数可変のポンプであり、貯湯槽上部に戻る湯の温度は常に所定温度以上、例えば45℃以上になるようにポンプ回転数が制御され、45℃に達しないときは集熱が停止する。この様なポンプ回転数制御をして集熱すると20℃や30℃の水が貯湯槽上部に戻って来て、湯の層を撹拌して冷やしてしまうことが起こらないので、貯湯槽上部に湯を層状に溜めることができる。したがって集熱が始まって短時間のうちに湯を使うことができる。   In the conventional general solar water heating system as shown in FIG. 1, even if the solar radiation becomes strong and the solar heat collection starts as described above, the hot water temperature in the hot water tank does not rise immediately in the morning. There was a bug that it could not be used. Fig. 2 shows a system in which hot water heated by solar heat can be used as soon as heat collection starts in the morning without such problems. In FIG. 2, 1 is a solar collector, 2 is a hot water storage tank, 8 is a temperature sensor such as a thermistor attached to the heat collecting plate, the solar collector hits the sun, the temperature of the heat collecting plate rises, and the sensor 8 When the temperature reaches a predetermined temperature, for example, 45 ° C. or more, the circulation pump indicated by 5 starts, water from the bottom of the hot water tank enters the heat collector via the circulation pump 5, and hot water heated by the heat collector is at the upper part of the hot water tank. It is a mechanism to return to. The circulation pump 5 is a variable speed pump whose signal can be controlled by a signal from the sensor 8, and the pump speed is controlled so that the temperature of the hot water returning to the upper part of the hot water tank is always higher than a predetermined temperature, for example, 45 ° C. or higher. If the temperature does not reach 45 ° C., heat collection stops. When collecting the heat by controlling the number of rotations of the pump in this way, water at 20 ° C or 30 ° C will return to the upper part of the hot water tank, and the hot water layer will not be stirred and cooled. Hot water can be stored in layers. Therefore, hot water can be used within a short time after heat collection begins.
太陽集熱が終了する午後3時ごろに貯湯槽の集熱湯量を検知して、入浴に不足の場合はそれから給湯器による追加湯沸しをして、夕方の入浴までに十分の湯量が得られれば良いわけである。追加湯沸しをする給湯器は安全性のレベルの問題を考えるとヒートポンプ給湯器が最も適している。そのような昼間電力利用のヒートポンプであると循環ポンプや貯湯槽は1個で太陽集熱とヒートポンプ給湯に共用できるので2重設備になるという不利が避けられる。しかし電気料金が深夜電力利用のように安くはないのでヒートポンプの成績係数を極力高いものにしなければならない。   If the amount of hot water in the hot water tank is detected at around 3pm when solar heat collection ends and if bathing is insufficient, then additional hot water can be boiled with a water heater and enough hot water can be obtained by the evening. That's good. The heat pump water heater is the most suitable as a water heater for additional water heating, considering the problem of safety level. In such a daytime power use heat pump, a single circulation pump and hot water tank can be shared for solar heat collection and heat pump hot water supply. However, since the electricity bill is not as cheap as using midnight power, the performance coefficient of the heat pump must be made as high as possible.
ヒートポンプの成績係数を高くするには湯温を必要以上に上げないことが最も有効である。従来の深夜電力利用のヒートポンプでは湯を沸かした次の夜に入浴するまで湯を保持するのが一般的であるからその間の熱ロス分も見越して余分に高い湯温にする必要があった。しかし住宅用給湯はほとんど50℃以下の低温利用であるから、50℃以下の温度で沸かすなら高い成績係数が期待できるはずである。昼間電力利用のヒートポンプでは湯を使う少し前に必要な量だけ沸かせばよいので熱ロスを少なくでき、したがってその分消費電力を少なく抑えられる。しかし、ヒートポンプで沸かす湯温を50℃程度に抑えて成績係数を上げるようにすると、浴槽の湯温を再加熱するときは差し湯による再加熱は難しくなる。従来の深夜電力利用のヒートポンプ給湯器では差し湯による再加熱もできるように、また湯を沸かした次の夜まで湯を保持するため、その間の熱ロスも考慮して湯温を高く設定しているため、通常のエアコンに用いている冷媒ではなく炭酸ガス冷媒を使用しているものが多い。貯湯槽内の湯温が高いと浴槽の湯を再加熱する熱交換器として貯湯槽内の湯と浴槽の湯を熱交換して浴槽の湯を再加熱する方式も多く用いられている。しかし湯温を低く設定して成績係数を高くしたい昼間電力利用のヒートポンプ給湯器ではそのような方式は非効率になるので再加熱には浴槽の湯をヒートポンプで直接再加熱する方式などにしなければならない。   To increase the coefficient of performance of the heat pump, it is most effective not to raise the hot water temperature more than necessary. Conventional heat pumps using midnight power generally hold hot water until it is bathed the next night after boiling the water, so it was necessary to make the water temperature excessively high in anticipation of heat loss during that time. However, since hot water for homes is mostly used at a low temperature of 50 ° C. or lower, a high coefficient of performance should be expected if it is boiled at a temperature of 50 ° C. or lower. In heat pumps that use daytime electric power, it is sufficient to boil only the required amount shortly before using hot water, so that heat loss can be reduced, and accordingly, power consumption can be reduced. However, if the coefficient of performance is raised by suppressing the hot water temperature boiled by the heat pump to about 50 ° C., reheating with hot water becomes difficult when reheating the hot water temperature of the bathtub. In conventional heat pump water heaters using midnight power, hot water can be reheated with hot water, and the hot water is kept until the next night after boiling the hot water. Therefore, many of them use carbon dioxide refrigerant instead of the refrigerant used in ordinary air conditioners. As a heat exchanger that reheats the hot water in the bathtub when the hot water temperature in the hot water tank is high, a system that reheats the hot water in the bathtub by exchanging heat between the hot water in the hot water tank and the hot water in the bathtub is often used. However, in a heat pump water heater that uses daytime power that wants to increase the coefficient of performance by setting the hot water temperature low, such a method becomes inefficient, so the hot water in the bathtub must be directly reheated with a heat pump for reheating. Don't be.
従来の深夜電力温水器では貯湯槽内の残湯量が少なくなって貯湯槽から湯を出そうとしても湯が出ないいわゆる湯切れが生ずる問題があるが、湯切れが生ずる前に追加湯沸かしを短時間で行えるなら、貯湯槽も従来の深夜電力温水器のように大きくする必要がない。そうするとコストも低くなり、設置スペースも狭くてよい。しかしヒートポンプ給湯器により短時間で追加湯沸かし出湯ができるようにするには、前述の太陽熱で加温した湯を貯湯槽上部に層状に溜める場合と同様にヒートポンプ給湯器によって沸かした湯も貯湯槽上部に層状に溜めることができるようにしなければならない。そのようなヒートポンプ給湯器を図2の太陽熱温水システムに組み込んだシステムを図3に示す。バックアップ熱源のヒートポンプ給湯器は図3において15がヒートポンプの冷媒圧縮機と蒸発熱交換器を含むユニット、14が2重管の凝縮熱交換器で外側を冷媒、内側を水が流れ、冷媒から水に熱が伝えられる。ヒートポンプ湯沸かし器を作動すると17の電磁弁が開き、ポンプ5が運転開始し、貯湯槽の水が底部からポンプに入り、14の熱交換器で暖められて湯になり貯湯槽上部に戻る。凝縮熱交換器14の湯の出口には温度センサー18が設置されており、出口湯温が一定値、例えば50℃になるようにポンプ5に18から制御信号が送られ、出口湯温のフィードバック制御がなされる。そのようなポンプ5の制御運転がなされることにより14の熱交換器で暖められた湯は貯湯槽上部に層状に溜まり、太陽集熱の場合と同じようにヒートポンプを運転して短時間後にはある程度の湯層が溜まると湯を出して使うことができる。湯層が底部に達するまでは貯湯槽底部の温度は水温に近い状態で維持されるので、図1のシステムにおけるような14の凝縮熱交換器に入る入口水温が上昇してヒートポンプの成績係数が悪くなるということは起こらない。   In conventional midnight electric water heaters, there is a problem that the amount of remaining hot water in the hot water tank decreases and hot water does not come out even if the hot water is taken out from the hot water tank. If it can be done in time, the hot water storage tank does not need to be as large as a conventional midnight power water heater. Then, the cost is reduced and the installation space may be narrow. However, in order to allow additional hot water to be discharged using a heat pump water heater, hot water boiled by a heat pump water heater is also added to the upper part of the hot water tank in the same manner as when the hot water heated by the solar heat is stored in a layer on the upper part of the hot water tank. It must be possible to accumulate in layers. FIG. 3 shows a system in which such a heat pump water heater is incorporated in the solar hot water system of FIG. The heat pump water heater of the backup heat source is a unit including a refrigerant compressor and an evaporative heat exchanger 15 in FIG. 3, 14 is a double pipe condensing heat exchanger, the outside is a refrigerant, the inside flows water, the refrigerant flows from the refrigerant to the water The heat is transmitted to. When the heat pump water heater is actuated, the solenoid valve 17 opens, the pump 5 starts operation, the water in the hot water tank enters the pump from the bottom, is heated by the heat exchanger 14 and becomes hot water, and returns to the upper part of the hot water tank. A temperature sensor 18 is installed at the hot water outlet of the condensation heat exchanger 14, and a control signal is sent from the pump 5 to the pump 5 so that the outlet hot water temperature becomes a constant value, for example, 50 ° C. Control is made. As a result of such a control operation of the pump 5, the hot water heated by the 14 heat exchangers accumulates in a layered manner in the upper part of the hot water storage tank, and after a short time after operating the heat pump as in the case of solar heat collection. When a certain amount of hot water has accumulated, the hot water can be taken out and used. Since the temperature at the bottom of the hot water tank is maintained close to the water temperature until the hot water layer reaches the bottom, the temperature of the inlet water entering the 14 condensation heat exchanger as in the system of FIG. It doesn't happen to get worse.
そこで、この出願に係る請求項1の発明の構成は水を熱媒とする太陽集熱器と、貯湯槽と、太陽集熱器のバックアップ熱源としてのヒートポンプ給湯器と、貯湯槽の底部から太陽集熱器、ヒートポンプ給湯器の凝縮熱交換器のいずれかに送水する流量可変の循環ポンプとを備えてなり、貯湯槽には、太陽集熱器からの湯を上部に戻す管路と、凝縮熱交換器からの湯を上部に戻す管路とを設け、循環ポンプは、太陽集熱器による集熱動作中、ヒートポンプ給湯器による給湯加熱中のいずれにおいても、貯湯槽の上部から湯が層状に溜まって行くように制御することをその要旨とする。   Therefore, the configuration of the invention of claim 1 according to this application is that a solar heat collector using water as a heat medium, a hot water storage tank, a heat pump water heater as a backup heat source of the solar heat collector, and a solar tank from the bottom of the hot water storage tank. It is equipped with a variable flow circulation pump that feeds water to either the heat collector or the heat exchanger of the heat pump water heater. The hot water storage tank has a conduit for returning hot water from the solar heat collector to the top, and condensation A pipe that returns hot water from the heat exchanger to the top is provided, and the circulation pump stratifies the hot water from the top of the hot water tank during heat collecting operation by the solar collector and hot water heating by the heat pump water heater. The gist of this is to control it so that it accumulates in
なお、太陽集熱器への送水管、太陽集熱器、太陽集熱器からの戻り管の内部の水を一挙に排水する凍結防止用の排水弁を設けることができる。   In addition, the drain valve for anti-freezing which drains the water inside the water supply pipe to a solar collector, a solar collector, and the return pipe from a solar collector at once can be provided.
請求項3の発明の構成は、不凍液を熱媒とする太陽集熱器と、貯湯槽と、太陽集熱器のバックアップ熱源としてのヒートポンプ給湯器と、貯湯槽の底部から太陽集熱器からの不凍液用の熱交換器、ヒートポンプ給湯器の凝縮熱交換器のいずれかに送水する流量可変の循環ポンプとを備えてなり、貯湯槽には、熱交換器からの湯を上部に戻す管路と、凝縮熱交換器からの湯を上部に戻す管路とを設け、循環ポンプは、太陽集熱器による集熱動作中、ヒートポンプ給湯器による給湯加熱中のいずれにおいても、貯湯槽の上部から湯が層状に溜まって行くように制御することをその要旨とする。   The configuration of the invention of claim 3 includes a solar collector using an antifreeze liquid as a heat medium, a hot water storage tank, a heat pump water heater as a backup heat source of the solar collector, and a solar collector from the bottom of the hot water storage tank. It is equipped with a variable flow rate circulation pump that supplies water to either the heat exchanger for antifreeze or the condensation heat exchanger of the heat pump water heater, and the hot water storage tank has a conduit for returning hot water from the heat exchanger to the top. And a pipe for returning the hot water from the condensing heat exchanger to the upper part, and the circulating pump is heated from the upper part of the hot water storage tank during the heat collecting operation by the solar collector and during the hot water heating by the heat pump water heater. The gist of this is to control so that is accumulated in layers.
なお、太陽集熱器には、不凍液用の可変流量の循環ポンプを組み合わせることができ、熱交換器は、2重管構造の対向流熱交換器とすることができる。   The solar collector can be combined with a variable flow circulation pump for antifreeze, and the heat exchanger can be a counter-flow heat exchanger with a double pipe structure.
また、ヒートポンプ給湯器は、凝縮熱交換器からの出口湯温を50℃程度に抑えてもよく、凝縮熱交換器は、冷媒凝縮管路、給湯加熱管路、浴槽再加熱管路の3重管構造に形成してもよい。   Moreover, the heat pump water heater may suppress the outlet hot water temperature from the condensation heat exchanger to about 50 ° C., and the condensation heat exchanger is a triple of a refrigerant condensing line, a hot water supply heating line, and a bathtub reheating line. You may form in a pipe structure.
本発明のヒートポンプバックアップ熱源を一体化した太陽熱温水システムでは利用者は蛇口をひねるだけで、常に温水が出る便利で使い勝手が良いものであり、しかも省エネルギーで、安全性にも優れた温水システムが提供される。地球環境問題の重要性が一般にも広く認識されている我が国において、容易に自然エネルギー利用が可能である太陽熱給湯が最近伸び悩みというよりむしろ減少傾向にある。以前は諸外国に比べ太陽熱給湯が最も普及していた我が国の最近の減少傾向の要因は高度に自動化された家庭電化製品が受け入れられている我が国においては、前述のように使い勝手の良くない太陽熱温水システムでは受け入れられないということである。本発明の太陽熱温水システムは太陽熱とヒートポンプの合理的な組み合わせにより、非常に使い勝手の良い温水システムを提供するものであり、我が国の太陽熱温水システムの普及をふたたび諸外国に負けない水準に押し上げる効果が期待される。   In the solar hot water system integrated with the heat pump backup heat source of the present invention, a user simply twists the faucet, and the hot water is always convenient and convenient to use, providing energy-saving hot water system with excellent safety. Is done. In Japan, where the importance of global environmental issues is widely recognized, solar hot water that can be easily used for natural energy has been decreasing rather than sluggish recently. In the past, solar hot water supply was most popular compared to other countries. The reason for the recent decline in Japan is that in Japan where highly automated home appliances are accepted, as mentioned above, solar hot water is not easy to use. The system is unacceptable. The solar water heating system of the present invention provides an extremely easy-to-use hot water system through a rational combination of solar heat and a heat pump, and has the effect of boosting the spread of solar water heating systems in Japan to a level comparable to other countries. Be expected.
従来の太陽熱利用給湯システム構成図Conventional solar water heating system configuration diagram 貯湯槽内で湯が上部に層状に蓄えられる太陽熱給湯システム説明図Explanatory drawing of solar water heating system in which hot water is stored in layers in the hot water tank ヒートポンプバックアップ熱源を備えた太陽熱給湯システム説明図Explanatory diagram of solar water heating system with heat pump backup heat source 本発明の実施例のシステム構成図System configuration diagram of an embodiment of the present invention 本発明の実施例のヒートポンプ凝縮熱交換器の断面図Sectional drawing of the heat pump condensation heat exchanger of the Example of this invention 本発明の別の実施例のシステム構成図The system block diagram of another Example of this invention
以下、図面を以って発明の実施の形態を説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.
図4は本発明の実施例のシステム構成図である。記号1〜10は図1と同様である。図4において1の集熱器に日射が当たって集熱板の温度センサー8が45℃以上になると集熱開始となり電磁弁16と19が開き、貯湯槽の水圧で送水管6と戻り管7を通って水が集熱器に入り、10の空気抜き弁から空気が排出されて、集熱器が水で満たされると電磁弁19は閉じて集熱ポンプ5が運転して集熱が開始される。集熱動作は貯湯槽底部から集熱ポンプで水が吐出され、開いている電磁弁16を経て水が集熱器に送られ、集熱器からの湯は戻り管7を通り、電磁弁19は閉じているので、逆止弁20を経て貯湯槽2の上部から貯湯槽に湯が戻り、上部から層状に湯が溜まってくる。集熱ポンプ5は可変回転数で集熱センサー8からの信号により、集熱湯温が45℃以上になるように回転数が制御される。集熱センサー8が45℃以下又は貯湯槽下部の水温以下の温度になった場合は集熱が停止し、電磁弁16が閉じ、集熱ポンプ5が停止する。この様に貯湯槽2の中は層状性が保たれるので集熱開始するとすぐに湯を出すことができ、太陽熱利用率が高く、湯温が45℃に達しないときは集熱しないことによる集熱効率の低下分をカバーして余りあると考えられる。   FIG. 4 is a system configuration diagram of an embodiment of the present invention. Symbols 1 to 10 are the same as those in FIG. In FIG. 4, when the solar collector 1 is exposed to sunlight and the temperature sensor 8 of the heat collecting plate reaches 45 ° C. or higher, heat collection starts and the electromagnetic valves 16 and 19 are opened, and the water supply pipe 6 and the return pipe 7 are opened by the water pressure of the hot water tank. When water enters the heat collector, air is discharged from the 10 air vent valves, and when the heat collector is filled with water, the solenoid valve 19 is closed and the heat collecting pump 5 is operated to start collecting heat. The In the heat collecting operation, water is discharged from the bottom of the hot water storage tank by a heat collecting pump, water is sent to the heat collecting device through the open electromagnetic valve 16, and the hot water from the heat collecting device passes through the return pipe 7 and passes through the electromagnetic valve 19. Is closed, the hot water returns from the upper part of the hot water tank 2 to the hot water tank through the check valve 20, and the hot water accumulates in layers from the upper part. The number of rotations of the heat collecting pump 5 is controlled by a signal from the heat collecting sensor 8 at a variable number of rotations so that the temperature of the collected hot water becomes 45 ° C. or higher. When the temperature of the heat collection sensor 8 is 45 ° C. or lower or below the temperature of the hot water storage tank, heat collection stops, the electromagnetic valve 16 closes, and the heat collection pump 5 stops. In this way, the layered nature of the hot water tank 2 is maintained, so that hot water can be taken out as soon as heat collection is started, the solar heat utilization rate is high, and when the hot water temperature does not reach 45 ° C., heat is not collected. It is thought that there is more to cover the decline in heat collection efficiency.
貯湯槽から湯を出湯させる場合は水道水が29で示す減圧弁を介して貯湯槽下部に接続されているので、この水道水圧で貯湯槽の上部から湯が押し出される。例えば浴槽への湯張りの場合は出湯用の電磁弁23が開き、図示しない混合栓で水道水と混合させて湯温を所定温度に調節して24で示す積算流量計で流量を計測して所定量に達すると電磁弁23が閉じて所定湯温、所定湯量の湯が浴槽に満たされる。   When hot water is discharged from the hot water tank, tap water is connected to the lower part of the hot water tank through a pressure reducing valve 29, so that hot water is pushed out from the upper part of the hot water tank by this tap water pressure. For example, in the case of filling a bathtub with a hot water, a solenoid valve 23 for hot water is opened, mixed with tap water using a mixing tap (not shown), the hot water temperature is adjusted to a predetermined temperature, and the flow rate is measured with an integrating flow meter 24. When the predetermined amount is reached, the solenoid valve 23 is closed, and a predetermined hot water temperature and a predetermined amount of hot water are filled in the bathtub.
また冬期に集熱器内の水が凍結して集熱器が破損するのを防ぐ仕組みは集熱板の温度センサー8によって集熱板の温度が凍結温度に近い温度になったことが検知されると集熱板内部の水が排出されて凍結が防止される。集熱板から水を抜く仕組みは電動排水弁21が開くことにより集熱板から水が送水管6を通って下に落下して排水される。そのとき集熱器の上の空気抜き弁10より空気が集熱板の中に流入する。貯湯槽の水は逆止弁20により止められているので排出されない。戻り管7の中の水も同時に抜けるように戻り管7から逆止弁22を通って排水弁21に接続されている。この様な送水管6と戻り管7をつなぐ管路があっても逆止弁22があるので集熱ポンプが運転されている集熱動作中は送水管6から集熱器に送水され戻り管7から貯湯槽上部に戻る正常な流れが維持される。   In addition, the mechanism to prevent water in the collector from freezing and damaging the collector in winter is detected by the temperature sensor 8 of the collector plate that the temperature of the collector plate is close to the freezing temperature. Then, the water inside the heat collecting plate is discharged and freezing is prevented. In the mechanism for draining water from the heat collecting plate, when the electric drain valve 21 is opened, water is dropped from the heat collecting plate through the water pipe 6 and drained. At that time, air flows into the heat collecting plate from the air vent valve 10 on the heat collector. The water in the hot water tank is not discharged because it is stopped by the check valve 20. The water in the return pipe 7 is connected to the drain valve 21 from the return pipe 7 through the check valve 22 so that water can be discharged at the same time. Even if there is such a pipe line connecting the water supply pipe 6 and the return pipe 7, the check valve 22 is provided, so that during the heat collecting operation in which the heat collecting pump is operated, water is sent from the water supply pipe 6 to the heat collector and the return pipe. A normal flow from 7 to the top of the hot water tank is maintained.
天気が悪く、集熱湯量が不足の場合はヒートポンプ15により湯を作ることができる。14はヒートポンプの給湯加熱用の凝縮器で図5に示すような3重管熱交換器で一番外側の環状部分30が冷媒凝縮管でその内側31が給湯の水の通路で通路断面が比較的狭にかかわらず十分な伝熱表面積を有しており、小流量の水が外側の冷媒と熱交換しながら一度の通過で所定の50℃くらいまで昇温され、貯湯槽上部から層状に湯が溜まっていくことになる。従って貯湯槽に湯がなくなっても短時間で貯湯槽上部に湯が溜まるので短時間後に出湯が可能になる。この様にヒートポンプによる給湯加熱においても貯湯槽内の温度の成層性がよく保たれるので、貯湯槽全部を温めるのではなく、入浴に必要な湯量に達したらヒートポンプを停止して省エネルギー化を図ることができる。また湯量が不足しそうになったら、ヒートポンプを再起動して追加湯沸かしが容易にできる。   When the weather is bad and the amount of collected hot water is insufficient, the heat pump 15 can make hot water. 14 is a condenser for heating hot water in a heat pump, and a triple pipe heat exchanger as shown in FIG. 5. The outermost annular portion 30 is a refrigerant condensing pipe, and its inner part 31 is a passage for hot water. Regardless of the size, it has a sufficient heat transfer surface area, and a small flow rate of water is heated up to a predetermined temperature of about 50 ° C in one pass while exchanging heat with the outside refrigerant. Will accumulate. Therefore, even if there is no hot water in the hot water tank, hot water is accumulated in the upper part of the hot water tank so that the hot water can be discharged after a short time. In this way, even in hot water heating with a heat pump, the stratification of the temperature in the hot water tank is well maintained, so instead of warming the entire hot water tank, when the amount of hot water required for bathing is reached, the heat pump is stopped to save energy be able to. If the amount of hot water is likely to be insufficient, the heat pump can be restarted to facilitate additional boiling.
図5の中心管32は浴槽の再加熱の熱交換の管路である。ヒートポンプの成績係数をよくして省エネルギー化を図るには前に説明したとおり湯温を必要以上に上げないことが最も効果的であり、そのために湯温を50℃程度に抑えることにしている。湯温が50℃程度の場合には、浴槽の湯温が低下して、差し湯などをして湯温を上げようとしても、50℃程度の差し湯では大量に湯を注がなければ温度を上げることができない。それを解決する手段として浴槽の湯を加熱器に循環して再加熱する方法がとられる。貯湯槽の湯と熱交換する方法がヒートポンプ給湯器では一般的に用いられているが、貯湯槽の湯が冷えてくるのでそれに対する対処の問題など機構が複雑化するので、ヒートポンプで浴槽の湯を直接加熱する方法が考えられる。しかしそうすると給湯加熱と浴槽の湯の加熱と二つの凝縮熱交換器が必要になり、これも機構が複雑化するという問題がある。それを避けるために図5に断面を示すような3重管構造の凝縮熱交換器によって、一つの熱交換パイプで給湯加熱と浴槽の湯の加熱と二つの作用ができる方式を考案した。つまり、中央部の管に浴槽の湯を循環させて外側の管路の熱媒と熱交換して浴槽再加熱を行うものである。   The central tube 32 in FIG. 5 is a heat exchange conduit for reheating the bathtub. In order to save energy by improving the coefficient of performance of the heat pump, it is most effective not to raise the hot water temperature more than necessary as described above. For this purpose, the hot water temperature is suppressed to about 50 ° C. When the hot water temperature is about 50 ° C, the temperature of the bath will drop, and even if you try to raise the hot water temperature with hot water, etc. Can not raise. As a means for solving this problem, a method of circulating hot water from a bathtub to a heater and reheating is used. The method of exchanging heat with hot water in the hot water tank is generally used in heat pump water heaters, but since hot water in the hot water tank cools down, the mechanism for dealing with it becomes complicated, so the hot water in the bathtub is A method of directly heating can be considered. However, if it does so, the hot water supply heating, the heating of the hot water of a bathtub, and two condensation heat exchangers will be needed, and this also has the problem that a mechanism becomes complicated. In order to avoid this, a system has been devised in which a triple heat-condensing heat exchanger whose cross section is shown in FIG. That is, the bathtub is reheated by circulating the hot water of the bathtub in the central pipe and exchanging heat with the heat medium of the outer pipe line.
図6は別の実施例を示したもので、不凍液による集熱方式とヒートポンプ給湯システムを組み合わせたものである。不凍液による集熱方式においては通常、図1に示すような貯湯槽の中の下部に不凍液から貯湯槽内の水に熱を伝える熱交換管3が設置されており、その管内に集熱器で加熱された不凍液を流すことにより貯湯槽内の水に熱を伝える方式ものが使われている。この方式は構造が簡単であるが集熱中は貯湯槽内の水は集熱器で暖められた不凍液で熱交換管が温められ、貯湯槽内に自然対流が生じて、貯湯槽内の水全体が徐々に温まっていく。従って集熱運転が何時間か継続された後にはじめて出湯できる温度に達する。図2の方式では前に説明した通り集熱器で所定温度(例えば45℃)以上に暖められた湯が貯湯槽の最上部に戻ってきて貯湯槽内に層状に湯が溜まってくるので集熱開始後短時間のうちに出湯できる。図6の実施例は不凍液集熱方式であるが図2の場合と同じように貯湯槽上部から層状に湯が溜まる仕組みになっている。   FIG. 6 shows another embodiment, which is a combination of a heat collecting system using antifreeze and a heat pump hot water supply system. In the heat collecting system using antifreeze liquid, a heat exchange pipe 3 for transferring heat from the antifreeze liquid to the water in the hot water tank is usually installed in the lower part of the hot water tank as shown in FIG. A method of transferring heat to the water in the hot water tank by flowing heated antifreeze is used. This system is simple in structure, but during heat collection, the water in the hot water tank is heated by the antifreeze liquid heated by the heat collector, and natural convection occurs in the hot water tank, resulting in the entire water in the hot water tank. Gradually warms up. Therefore, it reaches a temperature at which hot water can be discharged only after the heat collecting operation is continued for several hours. In the system shown in FIG. 2, hot water heated to a predetermined temperature (for example, 45 ° C.) or more by the heat collector returns to the top of the hot water tank and accumulates in layers in the hot water tank as described above. Hot water can be discharged in a short time after the start of heat. Although the embodiment of FIG. 6 is an antifreeze liquid collecting system, the hot water is accumulated in layers from the upper part of the hot water tank as in the case of FIG.
図6において集熱した不凍液から貯湯槽内の水への熱交換器3は貯湯槽の外に設置された2重管構造の熱交換器で、不凍液と貯湯槽内の水が2重管の内側と外側を互いに反対方向に流れる対向流熱交換器になっている。この様な構造の熱交換器を用いると、貯湯槽からポンプで熱交換器に送られて、熱交換器から出るときの水温を不凍液が熱交換器に入る温度に近い温度まで上げることができる。不凍液を用いた集熱方式においても、この様に不凍液循環と貯湯槽の水の循環と二つのポンプを使用して日射強度、または集熱温度に応じて二つのポンプの流量を適正に制御することにより、図2の場合と同じように貯湯槽上部から層状に湯が溜まるようにすることができる。バックアップ熱源のヒートポンプおよび浴槽の再加熱の機構などは図4の場合と同様である。   In FIG. 6, the heat exchanger 3 from the collected antifreeze liquid to the water in the hot water tank is a double-pipe heat exchanger installed outside the hot water tank. The antifreeze liquid and the water in the hot water tank are double pipes. It is a counterflow heat exchanger that flows in the opposite direction on the inside and outside. When a heat exchanger with such a structure is used, the temperature of the water that is sent from the hot water tank to the heat exchanger by a pump and exits the heat exchanger can be raised to a temperature close to the temperature at which the antifreeze enters the heat exchanger. . Even in the heat collection system using antifreeze, the flow of the two pumps is appropriately controlled according to the solar radiation intensity or the heat collection temperature using the antifreeze circulation and the water circulation in the hot water tank and the two pumps. Thus, hot water can be accumulated in a layered manner from the upper part of the hot water storage tank as in the case of FIG. The heat pump for the backup heat source and the reheating mechanism for the bathtub are the same as in FIG.
本発明は、一般家庭用を始めとする任意の用途の小規模システムとして、広く好適に利用することができる。   The present invention can be widely and suitably used as a small-scale system for any application including general household use.
1…太陽集熱器
2…貯湯槽
3…不凍液から給湯への熱交換器
4…不凍液タンク
5…集熱循環ポンプ
6…集熱器への送水管
7…集熱器からの温水戻り管
8…集熱温度センサー
9…センサーからポンプへの信号導線
10…空気抜き弁
11…貯湯槽への給水の整流板
12…出湯弁
13…貯湯槽への給水弁
14…ヒートポンプ凝縮熱交換器
15…ヒートポンプ給湯器
16…太陽集熱器による給湯加熱用の管路への電磁弁
17…ヒートポンプ給湯器による給湯加熱用の管路への電磁弁
18…ヒートポンプ給湯加熱器出口湯温センサー
19…電磁弁
20…逆止弁
21…凍結防止排水弁
22…凍結防止排水逆止弁
23…浴槽への出湯用の電磁弁
24…浴槽への自動湯張りのための流量センサー
25…浴槽への湯張り給湯管
26…浴槽再加熱の熱交換器への往管路
27…浴槽再加熱の熱交換器からの戻り管路
28…浴槽
29…貯湯槽への給水減圧弁
30…ヒートポンプ凝縮熱交換器の冷媒凝縮管路
31…ヒートポンプ凝縮熱交換器の給湯加熱管路
32…ヒートポンプ凝縮熱交換器の浴槽再加熱管路
33…浴槽再加熱のための浴槽の湯の循環ポンプ

特許出願人 エナテックス株式会社
株式会社 東洋ソーラーシステム研究所
DESCRIPTION OF SYMBOLS 1 ... Solar collector 2 ... Hot water storage tank 3 ... Heat exchanger from antifreeze liquid to hot water supply 4 ... Antifreeze liquid tank 5 ... Heat collection circulation pump 6 ... Water supply pipe to heat collector 7 ... Hot water return pipe from heat collector 8 ... Heat collection temperature sensor 9 ... Signal lead from sensor to pump 10 ... Air vent valve 11 ... Rectification plate for water supply to hot water tank 12 ... Hot water valve 13 ... Water supply valve to hot water tank 14 ... Heat pump condensing heat exchanger 15 ... Heat pump Water heater 16 ... Solenoid valve to pipe for heating hot water by solar collector 17 ... Solenoid valve to pipe for heating hot water by heat pump water heater 18 ... Heat pump hot water heater outlet hot water temperature sensor 19 ... Solenoid valve 20 ... Check valve 21 ... Anti-freezing drain valve 22 ... Anti-freezing drainage check valve 23 ... Solenoid valve for hot water supply to the bathtub 24 ... Flow sensor for automatic hot water filling to the bathtub 25 ... Hot water hot water supply pipe to the bathtub 26 ... Bathtub reheating Outgoing pipe to heat exchanger 27 ... Return pipe from heat exchanger for bath reheating 28 ... Bathtub 29 ... Feed water pressure reducing valve to hot water tank 30 ... Refrigerant condensation pipe 31 for heat pump condensation heat exchanger 31 ... Heat pump Condensation heat exchanger hot water supply heating line 32 ... Heat pump Condensation heat exchanger bathtub reheating pipe 33 ... Bathtub hot water circulation pump for bathtub reheating

Patent Applicant Enatex Corporation
Toyo Solar System Laboratory Co., Ltd.

Claims (7)

  1. 水を熱媒とする太陽集熱器と、貯湯槽と、前記太陽集熱器のバックアップ熱源としてのヒートポンプ給湯器と、前記貯湯槽の底部から前記太陽集熱器、前記ヒートポンプ給湯器の凝縮熱交換器のいずれかに送水する流量可変の循環ポンプとを備えてなり、前記貯湯槽には、前記太陽集熱器からの湯を上部に戻す管路と、前記凝縮熱交換器からの湯を上部に戻す管路とを設け、前記循環ポンプは、前記太陽集熱器による集熱動作中、前記ヒートポンプ給湯器による給湯加熱中のいずれにおいても、貯湯槽の上部から湯が層状に溜まって行くように制御することを特徴とする太陽熱給湯システム。   Solar collector using water as a heat medium, hot water storage tank, heat pump water heater as a backup heat source of the solar collector, condensation heat of the solar collector and the heat pump water heater from the bottom of the hot water tank A variable flow rate circulation pump for sending water to one of the exchangers, and the hot water storage tank has a conduit for returning hot water from the solar collector to the upper part, and hot water from the condensing heat exchanger. A pipe that returns to the upper part is provided, and the circulation pump accumulates hot water from the upper part of the hot water tank in a layered manner during both the heat collecting operation by the solar heat collector and the hot water supply heating by the heat pump water heater. A solar water heating system characterized by being controlled as follows.
  2. 前記太陽集熱器への送水管、前記太陽集熱器、前記太陽集熱器からの戻り管の内部の水を一挙に排水する凍結防止用の排水弁を設けることを特徴とする請求項1記載の太陽熱給湯システム。   2. A freezing prevention drain valve is provided for draining water inside a water pipe to the solar collector, the solar collector, and a return pipe from the solar collector at once. The described solar water heating system.
  3. 不凍液を熱媒とする太陽集熱器と、貯湯槽と、前記太陽集熱器のバックアップ熱源としてのヒートポンプ給湯器と、前記貯湯槽の底部から前記太陽集熱器からの不凍液用の熱交換器、前記ヒートポンプ給湯器の凝縮熱交換器のいずれかに送水する流量可変の循環ポンプとを備えてなり、前記貯湯槽には、前記熱交換器からの湯を上部に戻す管路と、前記凝縮熱交換器からの湯を上部に戻す管路とを設け、前記循環ポンプは、前記太陽集熱器による集熱動作中、前記ヒートポンプ給湯器による給湯加熱中のいずれにおいても、貯湯槽の上部から湯が層状に溜まって行くように制御することを特徴とする太陽熱給湯システム。   Solar collector using antifreeze as heat medium, hot water storage tank, heat pump water heater as backup heat source for solar collector, heat exchanger for antifreeze liquid from solar collector from bottom of hot water storage tank And a variable flow circulation pump for supplying water to any one of the heat exchangers of the heat pump water heater, and the hot water storage tank includes a conduit for returning hot water from the heat exchanger to the top, and the condensation A pipe for returning hot water from the heat exchanger to the upper part, and the circulation pump is provided from the upper part of the hot water storage tank during the heat collecting operation by the solar heat collector and during the hot water heating by the heat pump water heater. A solar hot water supply system that controls hot water to accumulate in layers.
  4. 前記太陽集熱器には、不凍液用の可変流量の循環ポンプを組み合わせることを特徴とする請求項3記載の太陽熱給湯システム。   4. The solar water heating system according to claim 3, wherein the solar collector is combined with a variable flow circulation pump for antifreeze.
  5. 前記熱交換器は、2重管構造の対向流熱交換器とすることを特徴とする請求項3または請求項4記載の太陽熱給湯システム。   5. The solar water heating system according to claim 3, wherein the heat exchanger is a counter-flow heat exchanger having a double-pipe structure.
  6. 前記ヒートポンプ給湯器は、前記凝縮熱交換器からの出口湯温を50℃程度に抑えることを特徴とする請求項1ないし請求項5のいずれか記載の太陽熱給湯システム。   The solar heat hot water supply system according to any one of claims 1 to 5, wherein the heat pump water heater suppresses the outlet hot water temperature from the condensing heat exchanger to about 50 ° C.
  7. 前記凝縮熱交換器は、冷媒凝縮管路、給湯加熱管路、浴槽再加熱管路の3重管構造に形成することを特徴とする請求項1ないし請求項6のいずれか記載の太陽熱給湯システム。   The solar heat hot water supply system according to any one of claims 1 to 6, wherein the condensation heat exchanger is formed in a triple pipe structure of a refrigerant condensation pipe, a hot water supply heating pipe, and a bathtub reheating pipe. .
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CN110260396A (en) * 2019-06-14 2019-09-20 北京建筑大学 Solar energy and soil source heat pump Coupling Thermal water cooling heating system based on layering heat management
WO2020228159A1 (en) * 2019-05-13 2020-11-19 马鞍山市博浪热能科技有限公司 Hot water control system for multiple compound energy source pressure-bearing modules

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WO2020228159A1 (en) * 2019-05-13 2020-11-19 马鞍山市博浪热能科技有限公司 Hot water control system for multiple compound energy source pressure-bearing modules
CN110260396A (en) * 2019-06-14 2019-09-20 北京建筑大学 Solar energy and soil source heat pump Coupling Thermal water cooling heating system based on layering heat management

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