JP2003194400A - Heat pump type hot water supply device - Google Patents
Heat pump type hot water supply deviceInfo
- Publication number
- JP2003194400A JP2003194400A JP2001394401A JP2001394401A JP2003194400A JP 2003194400 A JP2003194400 A JP 2003194400A JP 2001394401 A JP2001394401 A JP 2001394401A JP 2001394401 A JP2001394401 A JP 2001394401A JP 2003194400 A JP2003194400 A JP 2003194400A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- heat pump
- storage tank
- temperature
- water supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 237
- 238000003303 reheating Methods 0.000 claims abstract description 58
- 238000009835 boiling Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000003507 refrigerant Substances 0.000 claims description 32
- 239000008400 supply water Substances 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 4
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 4
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ヒートポンプ式
給湯装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type hot water supply device.
【０００２】[0002]
【従来の技術】ヒートポンプ式給湯装置は、一般には図
８に示すように、貯湯タンク７０を有するタンクユニッ
ト７１と、冷媒回路７２を有する熱源ユニット７３とを
備える。また、冷媒回路７２は、圧縮機７４と水熱交換
器７５と膨張弁７７と蒸発器７８とを順に接続して構成
される。そして、タンクユニット７１は、上記貯湯タン
ク７０と循環路７９とを備え、この循環路７９には、水
循環用ポンプ８０と熱交換路８１とが介設されている。
この場合、熱交換路８１は水熱交換器７５にて構成され
る。2. Description of the Related Art Generally, a heat pump type hot water supply apparatus includes a tank unit 71 having a hot water storage tank 70 and a heat source unit 73 having a refrigerant circuit 72, as shown in FIG. Further, the refrigerant circuit 72 is configured by connecting a compressor 74, a water heat exchanger 75, an expansion valve 77 and an evaporator 78 in this order. The tank unit 71 includes the hot water storage tank 70 and a circulation path 79, and a water circulation pump 80 and a heat exchange path 81 are provided in the circulation path 79.
In this case, the heat exchange passage 81 is composed of the water heat exchanger 75.
【０００３】上記装置においては、圧縮機７４を駆動さ
せると共に、ポンプ８０を駆動（作動）させると、貯湯
タンク７０の底部に設けた取水口から貯溜水（温湯）が
循環路７９に流出し、これが熱交換路８１を流通する。
そのときこの温湯は水熱交換器７５によって加熱され
（沸き上げられ）、湯入口から貯湯タンク７０の上部に
返流される。これによって、貯湯タンク７０に高温の温
湯を貯めるものである。そして、現状の電力料金制度は
深夜の電力料金単価が昼間に比べて安価に設定されてい
るので、近年では、この運転は低額である深夜時間帯
（例えば、２３時から７時までの時間帯）に行い、ラン
ニングコストの低減を図るようにしている。この場合、
一日の必要湯量が少ない場合には、深夜時間帯の運転の
みで必要湯量を沸き上げることができるが、必要湯量が
多い場合には、この深夜時間帯の運転に加えて、昼間の
追い焚き運転を行っていた。すなわち、貯湯タンク７０
の全量を沸上げる全量沸上運転と、不足分を補充する追
い焚き運転とがある。In the above apparatus, when the compressor 74 is driven and the pump 80 is driven (operated), stored water (hot water) flows out from the intake port provided at the bottom of the hot water storage tank 70 into the circulation path 79, This flows through the heat exchange passage 81.
At this time, this hot water is heated (boiled) by the water heat exchanger 75 and returned to the upper part of the hot water storage tank 70 from the hot water inlet. As a result, high-temperature hot water is stored in the hot water storage tank 70. In the current power rate system, the unit price of the power rate at midnight is set to be lower than that at daytime. Therefore, in recent years, this operation is low at midnight time (for example, time zone from 23:00 to 7:00). ) To reduce running costs. in this case,
If the required amount of hot water for a day is small, the required amount of hot water can be boiled only by operating in the late-night hours.However, if the required amount of hot water is large, in addition to the operation in the late-night hours, additional heating during the daytime is required. I was driving. That is, the hot water storage tank 70
There is a full-boiling operation that boils all of the above and a reheating operation that replenishes the shortfall.
【０００４】また、従来においては、上記冷媒回路の冷
媒として、ジクロロジフルオロメタン（Ｒ−１２）やク
ロロジフルオロメタン（Ｒ−２２）のような冷媒が使用
されてきたが、オゾン層の破壊、環境汚染等の問題か
ら、１，１，１，２−テトラフルオロエタン（Ｒ−１３
４ａ）のような代替冷媒が使用されるようになってい
る。しかしながらこのＲ−１３４ａにおいても、依然と
して地球温暖化能が高いなどの問題があることから、近
年では、このような問題のない自然系冷媒を使用するこ
とが推奨されつつある。この自然系冷媒として炭酸ガス
等の超臨界冷媒が有用であることは、公知である。Conventionally, a refrigerant such as dichlorodifluoromethane (R-12) or chlorodifluoromethane (R-22) has been used as the refrigerant in the refrigerant circuit, but the ozone layer is destroyed and the environment is destroyed. Due to problems such as contamination, 1,1,1,2-tetrafluoroethane (R-13
Alternative refrigerants such as 4a) are being used. However, even in this R-134a, there are still problems such as high global warming potential. Therefore, in recent years, it has been recommended to use a natural refrigerant which does not have such a problem. It is known that a supercritical refrigerant such as carbon dioxide is useful as the natural refrigerant.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記のよう
なヒートポンプ式給湯装置において、使用性能基準〔Ｊ
ＲＡ４０５０（日本冷凍空調工業会）〕に基づく貯湯タ
ンク容量を確保しながら貯湯タンク７０の容積をできる
かぎり小さくしようとすると（貯湯タンク７０の全容量
を貯湯タンクとしての表示容量にできるだけ近づけよう
とすると）、貯湯タンク７０内を所定温度以上の湯温で
満たす必要が生じる。そのため、全量沸上運転時におい
ては、熱交換路８１への入水温度が比較的高温（例え
ば、６０℃）になるまで運転が行われている。そしてこ
のような沸上運転制御は、上記全量沸上運転のみなら
ず、追い焚き運転においても全く同様に実施されている
のが実情である。なお、上記使用性能基準においては、
貯湯タンク７０が温水で満たされている状態において、
タンク頂部から１／１３ずつ出湯する操作を１時間毎に
１２回繰返し、１２回目の出湯温度（採湯温度）が所定
温度以上（例えば、タンク容量が３７０リットルの場合
であれば６０℃以上）であるときに、貯湯タンク７０の
容積をもって、貯湯容量として表示可能となっている。By the way, in the heat pump type hot water supply apparatus as described above, the performance standard [J
RA4050 (Japan Refrigeration and Air Conditioning Industry Association)] When securing the capacity of the hot water storage tank 70 while securing the capacity of the hot water storage tank 70 as much as possible (when trying to bring the total capacity of the hot water storage tank 70 as close to the display capacity as the hot water storage tank, ), It is necessary to fill the hot water storage tank 70 with a hot water temperature equal to or higher than a predetermined temperature. Therefore, during the total boiling operation, the operation is performed until the temperature of water entering the heat exchange passage 81 becomes relatively high (for example, 60 ° C.). It is the actual situation that such a boiling operation control is performed in the same manner not only in the total amount boiling operation but also in the reheating operation. In addition, in the above usage performance standards,
When the hot water storage tank 70 is filled with warm water,
The operation of tapping the hot water from the top of the tank by 1/13 is repeated 12 times every hour, and the tapping temperature of the 12th time (hot water temperature) is a predetermined temperature or higher (for example, 60 ° C or higher if the tank capacity is 370 liters). At this time, the volume of the hot water storage tank 70 can be displayed as the hot water storage capacity.
【０００６】また、上記のように超臨界冷媒を用いた場
合には、一般には、この種のヒートポンプユニットの冷
媒サイクルは、図７に示す実線に示すものとなる。しか
しながら、熱交換路８１への入水温度が上昇すれば、こ
の図７の仮想線（２点鎖線）で示すように、凝縮過程で
のエントロピ差が狭くなり、給湯能力及びＣＯＰが減少
していた。すなわち、従来では、図５に示すように、入
水温度が例えば６０℃になるまで運転していたので、こ
の運転における能力及びＣＯＰは図６に示すように、６
０℃に近づくと、急激に低下する。従って、入水温度が
６０℃に達するまで、追い焚き運転を継続すれば、ラン
ニングコストが大幅に増大する。When a supercritical refrigerant is used as described above, the refrigerant cycle of this type of heat pump unit is generally as shown by the solid line in FIG. However, if the temperature of the water entering the heat exchange passage 81 rises, the entropy difference in the condensation process narrows, and the hot water supply capacity and COP decrease, as indicated by the phantom line (two-dot chain line) in FIG. 7. . That is, conventionally, as shown in FIG. 5, since the operation was performed until the incoming water temperature reached, for example, 60 ° C., the capacity and COP in this operation were 6% as shown in FIG.
When it approaches 0 ° C., it drops sharply. Therefore, if the reheating operation is continued until the incoming water temperature reaches 60 ° C., the running cost increases significantly.
【０００７】この発明は、上記従来の欠点を解決するた
めになされたものであって、その目的は、追い焚き運転
時の能力及びＣＯＰを高く維持でき、ランニングコスト
の低減を図ることが可能なヒートポンプ式給湯装置を提
供することにある。The present invention has been made to solve the above-mentioned conventional drawbacks, and an object thereof is to maintain a high capacity and COP during reheating operation and to reduce running costs. It is to provide a heat pump type hot water supply device.
【０００８】[0008]
【課題を解決するための手段】そこで請求項１のヒート
ポンプ式給湯装置は、貯湯タンク３と、この貯湯タンク
３の上側と下側とを連結する循環路１２と、この循環路
１２に介設される熱交換路１４とを備え、この熱交換路
１４をヒートポンプ式加熱源にて加熱して、上記貯湯タ
ンク３の下側から循環路１２に流出した温水を沸き上げ
てこの貯湯タンク３の上側に返流する運転が可能とされ
ると共に、貯湯タンク３内の全量を沸き上げる全量沸上
運転と、不足分を沸き上げる追い焚き運転とを行うヒー
トポンプ式給湯装置であって、追い焚き運転が終了した
ときの上記熱交換路１４への入水温度が、全量沸上運転
が終了したときの入水温度よりも低くなるように構成し
たことを特徴としている。Therefore, the heat pump type hot water supply apparatus according to claim 1 has a hot water storage tank 3, a circulation path 12 connecting the upper side and the lower side of the hot water storage tank 3, and the circulation path 12 interposed therebetween. The heat exchange passage 14 is heated by a heat pump type heat source, and the hot water flowing out from the lower side of the hot water storage tank 3 into the circulation passage 12 is boiled to heat the hot water storage tank 3 of the hot water storage tank 3. A heat pump type hot water supply device that enables an operation of returning to the upper side and performs a total amount boiling operation of boiling all the amount in the hot water storage tank 3 and an additional heating operation of boiling the shortage, which is an additional heating operation. Is characterized in that the temperature of the water entering the heat exchange passage 14 at the end of the above is lower than the temperature of the water entering at the time when the total boiling operation is completed.
【０００９】請求項１のヒートポンプ式給湯装置では、
追い焚き運転が終了したときの上記熱交換路１４への入
水温度が、全量沸上運転が終了したときの入水温度より
も低くなるようにしているので、この追い焚き運転時の
能力及びＣＯＰの低下を回避することができる。In the heat pump type hot water supply device according to claim 1,
Since the temperature of the water entering the heat exchange passage 14 when the reheating operation is completed is lower than the water temperature when the total boiling operation is completed, the capacity and COP of the reheating operation are reduced. The drop can be avoided.
【００１０】請求項２のヒートポンプ式給湯装置は、追
い焚き運転開始時の上記入水温度よりも所定値だけ高い
入水温度にて、上記追い焚き運転を終了させることを特
徴としている。The heat pump type hot water supply apparatus according to a second aspect of the invention is characterized in that the reheating operation is terminated at an incoming water temperature which is higher by a predetermined value than the above described water temperature at the start of the reheating operation.
【００１１】上記請求項２のヒートポンプ式給湯装置で
は、追い焚き運転開始時の上記入水温度よりも所定値だ
け高い入水温度にて、追い焚き運転を終了させるので、
この所定値を、例えば、５℃位に設定しておけば、追い
焚き運転開始時の入水温度が１０℃位であれば、１５℃
位の入水温度で追い焚き運転が終了することになる。こ
のため、入水温度が大きく上昇する前に運転を停止する
ことができ、追い焚き運転時の能力及びＣＯＰの低下を
確実に回避することができる。In the heat pump type hot water supply apparatus according to the second aspect, since the reheating operation is finished at the incoming water temperature which is higher than the above-described entry water temperature at the start of the reheating operation by a predetermined value,
If this predetermined value is set to, for example, about 5 ° C, 15 ° C if the water temperature at the start of the reheating operation is about 10 ° C.
The reheating operation will be completed at the entry temperature of about 30 degrees. For this reason, the operation can be stopped before the incoming water temperature rises significantly, and it is possible to reliably avoid a decrease in the capacity and COP during the reheating operation.
【００１２】請求項３のヒートポンプ式給湯装置は、上
記貯湯タンク３の所定位置での湯温が所定温度に達した
ときに、上記追い焚き運転を終了させることを特徴とし
ている。The heat pump hot water supply apparatus according to a third aspect of the present invention is characterized in that the reheating operation is ended when the hot water temperature at a predetermined position of the hot water storage tank 3 reaches a predetermined temperature.
【００１３】上記請求項３のヒートポンプ式給湯装置で
は、貯湯タンク３の湯を循環路１２を介して循環させる
ものであるので、貯湯タンク３の所定位置での湯温を監
視することによって、入水温度を把握することができ
る。このため、貯湯タンクの所定位置での湯温が所定温
度に達したときに、追い焚き運転を終了させることによ
って、入水温度の上昇を回避して能力及びＣＯＰの低下
を招くことを防止することができる。In the heat pump type hot water supply apparatus according to the third aspect of the present invention, the hot water in the hot water storage tank 3 is circulated through the circulation path 12. Therefore, by monitoring the hot water temperature at a predetermined position of the hot water storage tank 3, You can know the temperature. Therefore, when the hot water temperature at the predetermined position of the hot water storage tank reaches the predetermined temperature, the reheating operation is terminated to prevent the rise of the incoming water temperature and prevent the deterioration of the capacity and COP. You can
【００１４】請求項４のヒートポンプ式給湯装置は、上
記追い焚き運転を少なくとも所定設定時間以上行うこと
を特徴としている。The heat pump hot water supply apparatus according to a fourth aspect is characterized in that the reheating operation is performed for at least a predetermined set time.
【００１５】上記請求項４のヒートポンプ式給湯装置で
は、追い焚き運転を少なくとも所定設定時間以上行うこ
とによって、貯湯タンク内の湯が減少して湯がなくなる
「湯切れ」を回避することができる。また、短時間内で
の運転のＯＮ・ＯＦＦを回避することができる。In the heat pump type hot water supply apparatus according to the fourth aspect, by performing the reheating operation for at least the predetermined set time or more, it is possible to avoid "run-out" in which the hot water in the hot water storage tank decreases and the hot water runs out. Further, it is possible to avoid turning the operation on and off within a short time.
【００１６】請求項５のヒートポンプ式給湯装置は、上
記全量沸上運転を深夜時間帯に行うと共に、上記追い焚
き運転をこの深夜時間帯外の昼間に行って、一日の必要
湯量を確保することを特徴としている。In the heat pump type hot water supply apparatus according to the fifth aspect, the full boiling operation is performed in the midnight time period, and the reheating operation is performed in the daytime outside the midnight time period to secure the required hot water amount for one day. It is characterized by that.
【００１７】上記請求項５のヒートポンプ式給湯装置で
は、現状の電力料金制度は深夜の電力料金単価が昼間に
比べて安価に設定されているので、この全量沸上運転
は、低額である深夜時間帯（例えば、２３時から７時ま
での時間帯）に行うものであり、この全量沸き上げで不
足する分を昼間に行うものであり、低料金で１日の必要
湯量を確保することができる。しかも、料金単価が高い
昼間の追い焚き運転において、能力及びＣＯＰを高く維
持したまま運転することになり、電気代の高騰を防止す
ることができる。In the heat pump type hot water supply apparatus according to claim 5, the current electricity rate system is such that the electricity rate unit price for late night is set to be lower than that for daytime. This is done in a zone (for example, the time zone from 23:00 to 7:00), and the amount insufficient for boiling all of this is done in the daytime, so that the required amount of hot water for one day can be secured at a low fee. . Moreover, in the daytime refueling operation in which the unit price is high, the operation is performed while maintaining high capacity and high COP, and it is possible to prevent a sharp rise in the electricity bill.
【００１８】請求項６のヒートポンプ式給湯装置は、ヒ
ートポンプ式加熱源の冷媒回路の冷媒に、超臨界で使用
する超臨界冷媒を用いることを特徴としている。The heat pump hot water supply apparatus according to claim 6 is characterized in that a supercritical refrigerant used in supercritical is used as the refrigerant of the refrigerant circuit of the heat pump heating source.
【００１９】上記請求項６のヒートポンプ式給湯装置で
は、冷媒に、超臨界で使用する超臨界冷媒を用いるの
で、オゾン層の破壊、環境汚染、地球温暖化等の問題の
発生を防止することができる。In the heat pump type hot water supply apparatus according to the sixth aspect, since the supercritical refrigerant used in supercritical is used as the refrigerant, it is possible to prevent problems such as destruction of the ozone layer, environmental pollution, and global warming. it can.
【００２０】[0020]
【発明の実施の形態】次に、この発明のヒートポンプ式
給湯装置の具体的な実施の形態について、図面を参照し
つつ詳細に説明する。図１はこのヒートポンプ式給湯装
置の簡略図を示し、このヒートポンプ式給湯装置は、タ
ンクユニット１とヒートポンプユニット（熱源ユニッ
ト）２を備え、タンクユニット１の水（温湯）をヒート
ポンプユニット２にて加熱するものである。このタンク
ユニット１は貯湯タンク３を備え、この貯湯タンク３に
貯湯された温湯が図示省略の浴槽等に供給される。すな
わち、貯湯タンク３には、その底壁に給水口５が設けら
れると共に、その上壁に出湯口６が設けられている。そ
して、給水口５から貯湯タンク３に市水が供給され、出
湯口６から高温の温湯が出湯される。また、貯湯タンク
３には、その底壁に取水口１０が開設されると共に、側
壁（周壁）の上部に湯入口１１が開設され、取水口１０
と湯入口１１とが循環路１２にて連結されている。そし
て、この循環路１２に水循環用ポンプ１３と熱交換路１
４とが介設されている。なお、給水口５には給水用流路
８が接続されている。BEST MODE FOR CARRYING OUT THE INVENTION Next, specific embodiments of the heat pump type hot water supply apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a simplified diagram of this heat pump type hot water supply device. This heat pump type hot water supply device comprises a tank unit 1 and a heat pump unit (heat source unit) 2, and water (hot water) in the tank unit 1 is heated by the heat pump unit 2. To do. The tank unit 1 includes a hot water storage tank 3, and hot water stored in the hot water storage tank 3 is supplied to a bath or the like (not shown). That is, the hot water storage tank 3 is provided with a water supply port 5 on its bottom wall and a hot water outlet 6 on its upper wall. Then, city water is supplied from the water supply port 5 to the hot water storage tank 3, and high-temperature hot water is discharged from the discharge port 6. Further, in the hot water storage tank 3, a water intake 10 is opened on the bottom wall thereof, and a hot water inlet 11 is opened on the upper part of the side wall (peripheral wall).
The hot water inlet 11 and the hot water inlet 11 are connected by a circulation path 12. Then, the water circulation pump 13 and the heat exchange path 1 are provided in the circulation path 12.
And 4 are provided. A water supply channel 8 is connected to the water supply port 5.
【００２１】ところで、貯湯タンク３には、上下方向に
所定ピッチで５個の残湯量検出器１８ａ、１８ｂ、１８
ｃ、１８ｄ、１８ｅが設けられている。上記各残湯量検
出器１８ａ・・は、例えば、それぞれサーミスタからな
る。また、上記循環路１２には、熱交換路１４の入口側
に取水サーミスタ２０が設けられると共に、熱交換路１
４の出口側に出湯サーミスタ２１が設けられている。By the way, in the hot water storage tank 3, five remaining hot water amount detectors 18a, 18b, 18 are arranged at a predetermined pitch in the vertical direction.
c, 18d, and 18e are provided. Each of the remaining hot water amount detectors 18a ... Is composed of, for example, a thermistor. Further, the circulation path 12 is provided with an intake thermistor 20 on the inlet side of the heat exchange path 14, and the heat exchange path 1
A hot water outlet thermistor 21 is provided on the exit side of No. 4.
【００２２】次に、ヒートポンプユニット（熱源ユニッ
ト）２は冷媒回路を備え、この冷媒回路は、圧縮機２５
と、熱交換路１４を構成する水熱交換器２６と、電動膨
張弁（減圧機構）２７と、空気熱交換器２８とを順に接
続して構成される。すなわち、圧縮機２５の吐出管２９
を水熱交換器２６に接続し、水熱交換器２６と電動膨張
弁２７とを冷媒通路３０にて接続し、電動膨張弁２７と
空気熱交換器２８とを冷媒通路３１にて接続し、空気熱
交換器２８と圧縮機２５とをアキュームレータ３２が介
設された冷媒通路３３にて接続している。これにより、
圧縮機２５が駆動すると、水熱交換器２６において熱交
換路１４を流れる水が加熱されることになる。なお、こ
の冷媒回路の冷媒には、例えば、自然系冷媒として炭酸
ガス等の超臨界冷媒を用いることができる。また、空気
熱交換器２８にはこの空気熱交換器２８の能力を調整す
るファン３４が付設されている。Next, the heat pump unit (heat source unit) 2 is provided with a refrigerant circuit, and this refrigerant circuit includes a compressor 25.
, A water heat exchanger 26 constituting the heat exchange passage 14, an electric expansion valve (pressure reducing mechanism) 27, and an air heat exchanger 28 are connected in this order. That is, the discharge pipe 29 of the compressor 25
Is connected to the water heat exchanger 26, the water heat exchanger 26 and the electric expansion valve 27 are connected by the refrigerant passage 30, and the electric expansion valve 27 and the air heat exchanger 28 are connected by the refrigerant passage 31. The air heat exchanger 28 and the compressor 25 are connected by a refrigerant passage 33 in which an accumulator 32 is provided. This allows
When the compressor 25 is driven, the water flowing through the heat exchange passage 14 is heated in the water heat exchanger 26. The refrigerant in the refrigerant circuit may be, for example, a supercritical refrigerant such as carbon dioxide as a natural refrigerant. Further, the air heat exchanger 28 is provided with a fan 34 for adjusting the capacity of the air heat exchanger 28.
【００２３】ところで、このヒートポンプ式給湯装置の
制御部は、図３に示すように、残湯量検出手段３７と、
この検出手段３７からのデータ（数値）が入力される制
御手段３８とを備える。すなわち、図１に示すように、
残湯量検出手段３７は、貯湯タンク３に付設された第１
・第２・第３・第４・第５残湯量検出器１８ａ、１８
ｂ、１８ｃ、１８ｄ、１８ｅにて構成することができ
る。そして、図２に示すように、第１残湯量検出器１８
ａの温度（第１タンク温度Ｔ１）、第２残湯量検出器１
８ｂの温度（第２タンク温度Ｔ２）、第３残湯量検出器
１８ｃの温度（第３タンク温度Ｔ３）、第４残湯量検出
器１８ｄの温度（第４タンク温度Ｔ４）、第５残湯量検
出器１８ｅの温度（第５タンク温度Ｔ５）、取水サーミ
スタ２０の温度（入水温度Ｔ６）等が制御手段（コント
ローラ）３８に入力され、これらのデータに基づいて、
水循環用ポンプ１３と圧縮機２５とを駆動して、後述す
るような運転が行われる。なお、上記制御手段３８は例
えばマイクロコンピュータを用いて構成することができ
る。By the way, as shown in FIG. 3, the control unit of the heat pump type hot water supply apparatus comprises a residual hot water amount detecting means 37,
The control means 38 receives data (numerical value) from the detecting means 37. That is, as shown in FIG.
The remaining hot water amount detecting means 37 is a first hot water tank attached to the hot water storage tank 3.
・ Second, third, fourth and fifth residual hot water amount detectors 18a, 18
b, 18c, 18d, 18e. Then, as shown in FIG. 2, the first remaining hot water amount detector 18
Temperature of a (first tank temperature T1), second residual hot water amount detector 1
8b temperature (second tank temperature T2), third remaining hot water amount detector 18c temperature (third tank temperature T3), fourth remaining hot water amount detector 18d temperature (fourth tank temperature T4), fifth remaining hot water amount detection The temperature of the container 18e (fifth tank temperature T5), the temperature of the water intake thermistor 20 (inlet temperature T6), etc. are input to the control means (controller) 38, and based on these data,
The water circulation pump 13 and the compressor 25 are driven to perform the operation described later. The control means 38 can be configured by using, for example, a microcomputer.
【００２４】上記のように構成されたヒートポンプ式給
湯装置によれば、圧縮機２５を駆動させると共に、水循
環用ポンプ１３を駆動（作動）させると、貯湯タンク３
の底部に設けた取水口１０から貯溜水（温湯）が流出
し、これが循環路１２の熱交換路１４を流通する。その
ときこの温湯は水熱交換器１４によって加熱され（沸き
上げられ）、湯入口１１から貯湯タンク３の上部に返流
される。このような動作を継続して行うことによって、
貯湯タンク３に高温の温湯を貯湯することができる。According to the heat pump type hot water supply apparatus constructed as described above, when the compressor 25 is driven and the water circulation pump 13 is driven (operated), the hot water storage tank 3
The stored water (warm water) flows out from the water intake 10 provided at the bottom of the circulation passage 12 of the circulation passage 12. At this time, the hot water is heated (boiling up) by the water heat exchanger 14 and returned from the hot water inlet 11 to the upper part of the hot water storage tank 3. By continuing this kind of operation,
Hot hot water can be stored in the hot water storage tank 3.
【００２５】この場合、深夜時間（２３時から次の日の
午前７時）帯のある時刻（例えば、深夜時間開始後の２
４時等）から所定時間の間運転して、所定時刻（深夜時
間終了時刻、つまり午前７時）で貯湯タンク３の容量の
湯を沸き上げる全量沸上運転を行う。また、一日の必要
湯量がこの貯湯タンク３の容量を越える場合には、深夜
時間の運転を行った後、さらに深夜時間外の昼間におい
て追い焚き運転を行って、その一日の必要湯量を確保す
る。この場合、貯湯タンク３の容量を満たす量の湯が沸
き上げられている場合に、所定量（例えば、５０リット
ル）の湯を使用して、その貯湯量が減少すれば、その減
少した所定量の湯を沸き上げる追い焚き運転を行うもの
である。なお、電力料金制度は深夜の電力料金単価が昼
間に比べて安価に設定されているので、全量沸上運転
は、低額である上記深夜時間帯（例えば、２３時から７
時までの時間帯）に行うようにしてる。In this case, a certain time (for example, 2 after the start of the midnight time) of the midnight time (from 23:00 to 7:00 am of the next day) band.
The operation is performed for a predetermined time from 4 o'clock, etc., and a total amount boiling operation of boiling up the hot water of the hot water storage tank 3 at a predetermined time (midnight time end time, that is, 7:00 am) is performed. When the required amount of hot water for one day exceeds the capacity of the hot water storage tank 3, after the operation at midnight time, the reheating operation is further performed in the daytime outside the midnight time to determine the required amount of hot water for the day. Secure. In this case, if a predetermined amount (for example, 50 liters) of hot water is used when the amount of hot water filling the capacity of the hot water storage tank 3 is boiled and the stored hot water amount decreases, the reduced predetermined amount This is a driving operation to boil up the hot water. Since the power rate system is set so that the unit price of electricity at midnight is lower than that at daytime, full-boiling operation is performed at a low price in the above-mentioned late-night hours (for example, from 23:00 to 7 PM).
I try to do it by the time.
【００２６】ところで、上記全量沸上運転は、上記取水
サーミスタ２０の温度（入水温度）が所定温度（例え
ば、６０℃）に達すれば、終了する。この場合、入水温
度が６０℃に達していれば、図６に示すように、能力及
びＣＯＰが大きく低下することになるが、前述したよう
に使用性能基準に従ってこの全量沸上運転を行う必要が
ある。By the way, the total boiling operation is completed when the temperature of the water intake thermistor 20 (inlet temperature) reaches a predetermined temperature (for example, 60 ° C.). In this case, if the input water temperature reaches 60 ° C., the capacity and COP will be greatly reduced as shown in FIG. 6, but as described above, it is necessary to perform this total boiling operation according to the usage performance standard. is there.
【００２７】これに対して、追い焚き運転においては、
全量沸上運転の場合と相違して、入水温度が６０℃に達
するまで運転する必要がなく、このヒートポンプ式給湯
装置においては、追い焚き運転が終了したときの入水温
度を、全量沸上運転が終了したときの入水温度よりも低
くなるように構成している。On the other hand, in the reheating operation,
Unlike the case of the total amount boiling operation, it is not necessary to operate until the incoming water temperature reaches 60 ° C, and in this heat pump type hot water supply device, the total incoming boiling temperature at the time when the reheating operation is completed is It is configured to be lower than the incoming water temperature when it is finished.
【００２８】次に、このヒートポンプ式給湯装置の運転
方法を図４のフローチャート図に基づいて説明する。ま
ず、圧縮機２５を駆動させると共に、水循環用ポンプ１
３を駆動（作動）させる沸上運転（全量沸上運転）を開
始する。そして、ステップＳ１で取水サーミスタ２０に
て検出された温度（Ｔ６）が所定温度（例えば、６０
℃）以上であるか否かを判断する。６０℃未満であれば
この運転を継続し、６０℃以上であればステップＳ２へ
移行して運転を停止する。すなわち、全量沸上運転が終
了する。Next, the operating method of this heat pump type hot water supply apparatus will be described with reference to the flow chart of FIG. First, while driving the compressor 25, the water circulation pump 1
The boiling operation (driving operation) of 3 is started (total amount boiling operation). Then, the temperature (T6) detected by the water intake thermistor 20 in step S1 is a predetermined temperature (for example, 60).
C)) or higher. If the temperature is lower than 60 ° C., this operation is continued, and if the temperature is 60 ° C. or higher, the operation proceeds to step S2 to stop the operation. That is, the total boiling operation ends.
【００２９】その後、追い焚き運転を行うかの判断を行
う。すなわち、ステップＳ３で、第５残湯量検出器１８
ｅの温度（Ｔ５）が所定温度（例えば、４５℃）未満か
否かを判断する。そして、Ｔ５が４５℃以上であれば、
貯湯タンク３の下部まで、４５℃以上の温湯が存在する
ことになるので、追い焚き運転を行う必要がなく、その
ままの状態を維持する。Ｔ５が４５℃未満であれば、温
湯が使用された結果、貯湯タンク３内の残湯量が減少
し、この貯湯タンク３の下部には低温の温湯が存在する
ことになって、追い焚き運転を行う必要があるので、ス
テップＳ４へ移行して追い焚き運転を開始する。After that, it is determined whether or not the additional heating operation is to be performed. That is, in step S3, the fifth remaining hot water amount detector 18
It is determined whether the temperature e (T5) is lower than a predetermined temperature (for example, 45 ° C.). If T5 is 45 ° C or higher,
Since hot water of 45 ° C. or higher exists up to the lower part of the hot water storage tank 3, it is not necessary to perform the reheating operation, and the state is maintained as it is. If T5 is less than 45 ° C, the amount of residual hot water in the hot water storage tank 3 decreases as a result of using hot water, and low-temperature hot water exists in the lower portion of the hot water storage tank 3, and the reheating operation is performed. Since it is necessary to perform this, the process proceeds to step S4 and the reheating operation is started.
【００３０】次に、ステップＳ５へ移行して、このステ
ップＳ５で追い焚き運転を終了するか否かの判断を行
う。すなわち、このステップＳ５で、Ｔ５≧６０℃かつ
この追い焚き運転を開始してから所定時間（例えば、３
０分）経過したかの判断を行う。そして、Ｔ５が６０℃
以上でかつ３０分経過していれば、この追い焚き運転を
終了する。また、Ｔ５が６０℃未満や３０分経過してい
なければ、追い焚き運転を継続する。すなわち、Ｔ５が
６０℃以上であれば、図５に示すように、上記入水温度
Ｔ６が約１５℃に達しており、これにより追い焚き終了
温度に達したとして、上記追い焚き運転を終了するもの
であるが、追い焚き運転を開始して、まだ短時間しか経
過していなければ、例えＴ５が６０℃以上であっても、
追い焚き運転を、少なくとも３０分以上行う。これは、
Ｔ５が６０℃以上となって、入水温度Ｔ６が１５℃以上
となれば、図６に示すように、能力やＣＯＰが急激に低
下することになるが、短時間内に運転のＯＮ・ＯＦＦを
繰り返すと、ＯＮ時の起動運転ロスの占める比率が過大
とななって、かえってＣＯＰの低下を招くことになるか
らである。また、３０分程度の運転では、Ｔ５が６０℃
以上となるおそれはきわめて少ないと考えられ、追い焚
き運転を開始して３０分を経過するまでは、この追い焚
き運転を継続するほうが好ましいといえるからであり、
このように制御しても、この追い焚き運転において、入
水温度が大きく上昇する前に停止（終了）する場合が多
く生じる。Next, the process proceeds to step S5, and it is determined in step S5 whether or not the additional heating operation is to be ended. That is, in step S5, T5 ≧ 60 ° C. and a predetermined time (for example, 3
It is determined whether 0 minutes has passed. And T5 is 60 ℃
If the above and 30 minutes have passed, this reheating operation is ended. If T5 is less than 60 ° C. or 30 minutes have not elapsed, the reheating operation is continued. That is, if T5 is 60 ° C. or higher, as shown in FIG. 5, the water temperature T6 has reached about 15 ° C., and the reheating operation is terminated on the assumption that the reheating temperature is reached. However, if only a short time has passed since the start of the reheating operation, even if T5 is 60 ° C or higher,
Do the driving operation for at least 30 minutes. this is,
If T5 rises above 60 ° C and the incoming water temperature T6 rises above 15 ° C, the capacity and COP will drop sharply as shown in Fig. 6, but the operation can be turned ON / OFF within a short time. This is because if it is repeated, the ratio of the start-up operation loss at the time of ON becomes too large, which rather causes a decrease in COP. In addition, in the operation for about 30 minutes, T5 is 60 ℃
It is considered that there is an extremely small possibility of becoming the above, and it can be said that it is preferable to continue this reheating operation until 30 minutes have elapsed after starting the reheating operation,
Even with such control, in this reheating operation, there are many cases where it is stopped (finished) before the incoming water temperature rises significantly.
【００３１】従って、上記ヒートポンプ式給湯装置にお
いては、不足分の追い焚き運転も確実に行うことがで
き、この追い焚き運転では、入水温度が大きく上昇する
前に停止（終了）することができ、能力やＣＯＰを高く
維持することができ、ランニング（電気代）の低減を図
ることができる。また、深夜時間帯において全量沸上運
転を行うことができ、昼間に不足分の追い焚き運転を行
うことができ、低料金で１日の必要湯量を確保できる。Therefore, in the above heat pump type hot water supply device, the short-term reheating operation can be surely performed, and in this reheating operation, it can be stopped (finished) before the incoming water temperature rises significantly. The ability and COP can be maintained high, and running (electricity bill) can be reduced. Further, the full boiling operation can be performed in the midnight time period, the short-term reheating operation can be performed in the daytime, and the daily required hot water amount can be secured at a low charge.
【００３２】ところで、図４に示すフローチャートで
は、第５湯量検出器１８ｅの温度（Ｔ５）を監視するこ
とによって、追い焚き運転を終了していたが、他の実施
の形態として、追い焚き運転開始時の上記入水温度より
も所定値だけ高い入水温度にて、追い焚き運転を終了す
るようにしてもよい。すなわち、追い焚き運転開始時の
取水サーミスタ２０による入水温度Ｔ６（例えば、１０
℃）を検出しておき、追い焚き運転を開始後に、このＴ
６が例えば、５℃上昇した（つまり１５℃に達した）と
きに、この追い焚き運転を終了するようにしてもよい。
この場合であっても、入水温度が大きく上昇する前に停
止（終了）することができ、能力やＣＯＰを高く維持す
ることができる。In the flow chart shown in FIG. 4, the reheating operation is finished by monitoring the temperature (T5) of the fifth hot water amount detector 18e. However, as another embodiment, the reheating operation is started. The reheating operation may be ended at a water temperature that is higher by a predetermined value than the above-described entry water temperature. That is, the incoming water temperature T6 (for example, 10) by the intake thermistor 20 at the start of the reheating operation.
℃) is detected, and after starting the reheating operation, this T
For example, when 6 has risen by 5 ° C. (that is, has reached 15 ° C.), this reheating operation may be terminated.
Even in this case, it is possible to stop (end) before the input water temperature rises significantly, and it is possible to maintain high capacity and COP.
【００３３】また、別の実施の形態として、上記残湯量
検出器１８ａ〜残湯量検出器１８ｅ以外に、貯湯タンク
３の底部に温度サーミスタ（図示省略）を設け、この温
度サーミスタの検出温度が所定温度に達すれば、追い焚
き運転を停止するようにしてもよい。すなわち、この温
度サーミスタの検出温度は入水温度とほぼ同じとなるの
で、この温度サーミスタの温度を監視することによっ
て、入水温度が大きく上昇する前に停止（終了）するこ
とができ、能力やＣＯＰを高く維持することができる。As another embodiment, a temperature thermistor (not shown) is provided at the bottom of the hot water storage tank 3 in addition to the remaining hot water amount detector 18a to the remaining hot water amount detector 18e, and the temperature detected by the temperature thermistor is predetermined. When the temperature is reached, the reheating operation may be stopped. That is, since the temperature detected by this temperature thermistor is almost the same as the incoming water temperature, by monitoring the temperature of this temperature thermistor, it is possible to stop (end) before the incoming water temperature rises significantly, and to improve the capacity and COP. Can be kept high.
【００３４】以上にこの発明の具体的な実施の形態につ
いて説明したが、この発明は上記形態に限定されるもの
ではなく、この発明の範囲内で種々変更して実施するこ
とができる。例えば、追い焚き運転を終了する際の入水
温度としては、１５℃に限るものではなく、能力及びＣ
ＯＰが低下する前に運転を停止することになる範囲にお
いて変更することができる。また、図４に示すフローチ
ャートでは、Ｔ５の温度に基づいて、追い焚き運転を終
了するものであり、この場合、６０℃を基準としている
が、この６０℃に限るものではない。すなわち、Ｔ５を
求める検出器１８ｅの高さ位置等によって、このＴ５に
対するＴ６の温度が相違することになるので、この検出
器１８ｅの高さ位置等に応じて、判断する温度を変更す
る必要がある。さらに、追い焚き運転を行う場合におい
て、所定時間（３０分）以上運転することとしている
が、この所定時間としても、能力やＣＯＰの減少を考慮
して、変更することができる。なお、冷媒回路の冷媒と
して、ジクロロジフルオロメタン（Ｒ−１２）やクロロ
ジフルオロメタン（Ｒ−２２）のような冷媒であって
も、オゾン層の破壊、環境汚染等の問題から、１，１，
１，２−テトラフルオロエタン（Ｒ−１３４ａ）のよう
な代替冷媒であってもよい。Although the specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be carried out within the scope of the present invention. For example, the water temperature at the time of ending the reheating operation is not limited to 15 ° C, but the capacity and C
It can be changed within a range in which the operation is stopped before the OP decreases. Further, in the flowchart shown in FIG. 4, the reheating operation is terminated based on the temperature of T5. In this case, 60 ° C. is used as a reference, but the temperature is not limited to 60 ° C. That is, since the temperature of T6 with respect to T5 varies depending on the height position of the detector 18e for which T5 is obtained, it is necessary to change the temperature to be determined according to the height position of the detector 18e. is there. Further, when the reheating operation is performed, the operation is performed for a predetermined time (30 minutes) or more, but the predetermined time can be changed in consideration of the decrease in the capacity and the COP. Even if a refrigerant such as dichlorodifluoromethane (R-12) or chlorodifluoromethane (R-22) is used as the refrigerant of the refrigerant circuit, the problems such as ozone layer destruction, environmental pollution, etc.
It may be an alternative refrigerant such as 1,2-tetrafluoroethane (R-134a).
【００３５】[0035]
【発明の効果】請求項１のヒートポンプ式給湯装置によ
れば、追い焚き運転終了時の入水温度が低くなるように
しているので、追い焚き運転時の能力及びＣＯＰの低下
を回避することができ、ランニングコストの低減が可能
となる。According to the heat pump type hot water supply apparatus of the first aspect of the present invention, since the water temperature at the end of the reheating operation is lowered, it is possible to avoid a decrease in the capacity and COP during the reheating operation. Therefore, the running cost can be reduced.
【００３６】請求項２のヒートポンプ式給湯装置によれ
ば、入水温度が大きく上昇する前に運転を停止すること
ができ、追い焚き運転時の能力及びＣＯＰの低下を確実
に回避することができ、安定した追い焚き運転を行うこ
とができる。According to the heat pump type hot water supply apparatus of the second aspect, the operation can be stopped before the incoming water temperature rises significantly, and the deterioration of the capacity and COP during the reheating operation can be reliably avoided. Stable reheating operation can be performed.
【００３７】請求項３のヒートポンプ式給湯装置によれ
ば、入水温度の上昇を回避して能力及びＣＯＰの低下を
招くことを防止することができ、安定した追い焚き運転
を行うことができる。According to the heat pump type hot water supply apparatus of the third aspect, it is possible to avoid the rise of the incoming water temperature and prevent the deterioration of the capacity and the COP, and it is possible to perform the stable reheating operation.
【００３８】請求項４のヒートポンプ式給湯装置によれ
ば、貯湯タンク内の湯が減少して湯がなくなる「湯切
れ」を回避することができる。また、短時間内での運転
のＯＮ・ＯＦＦを回避することができ、これにより、Ｃ
ＯＰの低下の防止が可能となる。これは、短時間内に運
転のＯＮ・ＯＦＦを繰り返せば、ＯＮ時の起動運転ロス
の占める比率が過大となって、ＣＯＰの低下を招くこと
になるからである。According to the heat pump type hot water supply apparatus of the fourth aspect, it is possible to avoid "run-out" in which the hot water in the hot water storage tank decreases and the hot water runs out. In addition, it is possible to avoid turning ON / OFF the operation within a short time, which allows C
It is possible to prevent the OP from decreasing. This is because if the operation is turned on and off repeatedly within a short period of time, the ratio of the start-up operation loss at the time of turning on becomes excessive, resulting in a decrease in COP.
【００３９】請求項５のヒートポンプ式給湯装置によれ
ば、全量沸上運転は、低額である深夜時間帯（例えば、
２３時から７時までの時間帯）に行うものであり、この
全量沸き上げで不足する分を昼間に行うものであり、低
料金で１日の必要湯量を確保することができる。しか
も、料金単価が高い昼間の追い焚き運転において、能力
及びＣＯＰを高く維持したまま運転することになり、ラ
ンニングコストの上昇を防止することができる。According to the heat pump type hot water supply apparatus of claim 5, the full boiling operation is performed at a low price in the midnight hours (for example,
This is done from 23:00 to 7:00), and the amount that is not enough due to the boiling of all of this is done in the daytime, so that the required amount of hot water for one day can be secured at a low charge. In addition, in the daytime refueling operation in which the unit price is high, the operation is performed while maintaining high capacity and COP, and it is possible to prevent an increase in running cost.
【００４０】請求項６のヒートポンプ式給湯装置によれ
ば、オゾン層の破壊、環境汚染、地球温暖化等の問題の
発生を防止することができ、地球環境の観点から優れた
装置となる。According to the heat pump type hot water supply apparatus of the sixth aspect, it is possible to prevent problems such as destruction of the ozone layer, environmental pollution, and global warming, and it is an excellent apparatus from the viewpoint of the global environment.
【図１】この発明のヒートポンプ式給湯装置の実施形態
を示す簡略図である。FIG. 1 is a simplified diagram showing an embodiment of a heat pump type hot water supply device of the present invention.
【図２】上記ヒートポンプ式給湯装置の制御部に入力さ
れるデータを示す簡略ブロック図である。FIG. 2 is a simplified block diagram showing data input to a control unit of the heat pump water heater.
【図３】上記ヒートポンプ式給湯装置の制御部の簡略ブ
ロック図である。FIG. 3 is a simplified block diagram of a control unit of the heat pump water heater.
【図４】上記ヒートポンプ式給湯装置の運転を示すフロ
ーチャート図である。FIG. 4 is a flowchart showing an operation of the heat pump type hot water supply device.
【図５】入水温度と貯湯タンクの下部の温度との関係を
示すグラフ図である。FIG. 5 is a graph showing a relationship between an incoming water temperature and a temperature of a lower portion of the hot water storage tank.
【図６】入水温度と、能力及びＣＯＰとの関係を示すグ
ラフ図である。FIG. 6 is a graph showing the relationship between the incoming water temperature, the capacity and the COP.
【図７】従来のヒートポンプ式給湯装置の欠点を説明す
るための冷凍サイクルのグラフ図である。FIG. 7 is a graph diagram of a refrigeration cycle for explaining a defect of a conventional heat pump hot water supply device.
【図８】従来のヒートポンプ式給湯装置の簡略図であ
る。FIG. 8 is a simplified diagram of a conventional heat pump type hot water supply device.
３ 貯湯タンク １２ 循環路 １４ 熱交換路 3 hot water storage tank 12 circuit 14 heat exchange path
Claims (6)
（３）の上側と下側とを連結する循環路（１２）と、こ
の循環路（１２）に介設される熱交換路（１４）とを備
え、この熱交換路（１４）をヒートポンプ式加熱源にて
加熱して、上記貯湯タンク（３）の下側から循環路（１
２）に流出した温水を沸き上げてこの貯湯タンク（３）
の上側に返流する運転が可能とされると共に、貯湯タン
ク（３）内の全量を沸き上げる全量沸上運転と、不足分
を沸き上げる追い焚き運転とを行うヒートポンプ式給湯
装置であって、追い焚き運転が終了したときの上記熱交
換路（１４）への入水温度が、全量沸上運転が終了した
ときの入水温度よりも低くなるように構成したことを特
徴とするヒートポンプ式給湯装置。1. A hot water storage tank (3), a circulation path (12) connecting the upper side and the lower side of the hot water storage tank (3), and a heat exchange path (14) interposed in the circulation path (12). ) And the heat exchange passage (14) is heated by a heat pump type heating source, and the circulation passage (1
This hot water storage tank (3)
A heat pump type hot water supply device which is capable of returning to the upper side of the hot water storage tank (3) and performs a total amount boiling operation of boiling all the amount in the hot water storage tank (3) and an additional heating operation of boiling up the shortage, A heat pump type hot water supply device, characterized in that the temperature of water entering the heat exchange passage (14) when the reheating operation is completed is lower than the water temperature when the total boiling operation is completed.
も所定値だけ高い入水温度にて、上記追い焚き運転を終
了させることを特徴とする請求項１のヒートポンプ式給
湯装置。2. The heat pump type hot water supply apparatus according to claim 1, wherein the reheating operation is finished at a water temperature which is higher than the above-mentioned entry water temperature at the start of the reheating operation by a predetermined value.
温が所定温度に達したときに、上記追い焚き運転を終了
させることを特徴とする請求項１又は請求項２のヒート
ポンプ式給湯装置。3. The heat pump hot water supply system according to claim 1 or 2, wherein the reheating operation is terminated when the hot water temperature at a predetermined position of the hot water storage tank (3) reaches a predetermined temperature. apparatus.
時間以上行うことを特徴とする請求項１〜請求項３のい
ずれかのヒートポンプ式給湯装置。4. The heat pump type hot water supply apparatus according to claim 1, wherein the reheating operation is performed for at least a predetermined set time.
共に、上記追い焚き運転をこの深夜時間帯外の昼間に行
って、一日の必要湯量を確保することを特徴とする請求
項１〜請求項４のいずれかのヒートポンプ式給湯装置。5. The full boiling operation is performed during the midnight time period, and the additional heating operation is performed during the daytime outside the midnight time period to secure a necessary hot water amount for one day. ~ The heat pump type hot water supply device according to claim 4.
に、超臨界で使用する超臨界冷媒を用いることを特徴と
する請求項１〜請求項５のいずれかのヒートポンプ式給
湯装置。6. The heat pump hot water supply apparatus according to claim 1, wherein a supercritical refrigerant used in supercritical is used as the refrigerant of the refrigerant circuit of the heat pump heating source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001394401A JP3840573B2 (en) | 2001-12-26 | 2001-12-26 | Heat pump type water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001394401A JP3840573B2 (en) | 2001-12-26 | 2001-12-26 | Heat pump type water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003194400A true JP2003194400A (en) | 2003-07-09 |
| JP3840573B2 JP3840573B2 (en) | 2006-11-01 |
Family
ID=27601145
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001394401A Expired - Lifetime JP3840573B2 (en) | 2001-12-26 | 2001-12-26 | Heat pump type water heater |
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| Country | Link |
|---|---|
| JP (1) | JP3840573B2 (en) |
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| JP2006194460A (en) * | 2005-01-11 | 2006-07-27 | Matsushita Electric Ind Co Ltd | Heat pump water heater |
| EP1711759A1 (en) * | 2004-01-20 | 2006-10-18 | Carrier Corporation | Energy-efficient heat pump water heater |
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