JP2005345099A - Heat pump hot-water supply device - Google Patents

Heat pump hot-water supply device Download PDF

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JP2005345099A
JP2005345099A JP2005249143A JP2005249143A JP2005345099A JP 2005345099 A JP2005345099 A JP 2005345099A JP 2005249143 A JP2005249143 A JP 2005249143A JP 2005249143 A JP2005249143 A JP 2005249143A JP 2005345099 A JP2005345099 A JP 2005345099A
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hot water
heat pump
water supply
outside air
air temperature
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JP2005345099A5 (en
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Takeshi Hiwada
武史 桧皮
Mikihiko Kuroda
幹彦 黒田
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Daikin Industries Ltd
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Daikin Industries Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To surely make prevention of hot-water shortage and energy saving performance compatible in a heat pump hot-water supply device. <P>SOLUTION: This heat pump hot-water supply device wherein a heat pump heating means 1 provided with a capacity variable compressor 11 is connected to a hot-water storage tank 21 is provided with an outside air temperature detecting means 3 for detecting an outside air temperature, a clocking means for detecting a time, and a control means 5 for changing an operation frequency of the compressor 11, based on both the outside air temperature detected by the outside air temperature detecting means 3 and a time zone in one day. An unbalance between a hot-water supply and a heating-up capacity of the heat pump heating means 1 is eliminated as much as possible, by this constitution, and the heat pump heating means 1 is thereby precluded from being operated with the heating-up capacity exceeding a required level to realize an energy saving operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本願発明は、水の加熱手段としてヒートポンプ加熱手段を用いたヒートポンプ給湯装置に関するものである。   The present invention relates to a heat pump water heater using a heat pump heating means as a means for heating water.

従来より、冷媒循環式のヒートポンプを加熱源として用いたヒートポンプ給湯装置としては、種々構造のものが提案されている(例えば、特開昭60−221661号公報(第1公知例)、特開昭61−153429号公報(第2公知例)、特開平9−68369号公報(第3公知例)参照)。   Conventionally, heat pump water heaters using a refrigerant circulation heat pump as a heat source have been proposed in various structures (for example, Japanese Patent Application Laid-Open No. 60-221661 (first known example), Japanese Patent Application Laid-Open No. Sho). No. 61-153429 (second known example), Japanese Patent Laid-Open No. 9-68369 (third known example)).

ヒートポンプ給湯装置においては、貯湯タンクとして、湯又は湯と水とが常時満タン状態に維持される常時満タン式のタンクが採用されるのが通例である。また、給水に対する加熱方式としては、給水を直接ヒートポンプの熱交換器に導入し、ここでの熱交換により得られた湯を貯湯タンクに貯湯し必要に応じて出湯する方式とか、貯湯タンク内に給水するとともに該貯湯タンクとヒートポンプの熱交換器との間で水を循環させて湯を得る方式とか、ヒートポンプ側の熱交換器との間で冷媒循環系を構成する加熱用熱交換器を貯湯タンク内に配置し該加熱用熱交換器によって貯湯タンクに給水された水を間接的に加熱する方式等、種々の方式が提案されている。   In a heat pump hot water supply apparatus, as a hot water storage tank, a normally full tank that always keeps hot water or hot water and water in a full tank state is adopted. In addition, as a heating method for the water supply, the water supply is directly introduced into the heat exchanger of the heat pump, the hot water obtained by the heat exchange here is stored in a hot water storage tank, and the hot water is discharged as needed. A method of supplying hot water and circulating water between the hot water storage tank and a heat exchanger of the heat pump to obtain hot water, or a heating heat exchanger that constitutes a refrigerant circulation system with the heat exchanger on the heat pump side Various systems have been proposed, such as a system in which water is disposed in a tank and water supplied to the hot water storage tank is indirectly heated by the heating heat exchanger.

ヒートポンプ給湯装置においては、貯湯タンクの残湯量が所定以下に低下したとき(即ち、貯湯タンク内における湯の比率が所定以下に低下したとき)には、湯切れ(即ち、湯の比率が零近くとなり貯湯タンク内を低温の水がほとんど占める状態)を防止すべく、「追炊き」を行うことが必要である。尚、ここでいう「追炊き」には、上記各加熱方式に対応して、新たに得た湯を貯湯タンクに追加的に導入して貯湯量を回復させる(即ち、貯湯タンク内における湯の比率を高める)形態と、貯湯タンク内にある湯又は水を追加的に加熱して湯温を高めることで貯湯量を回復させる形態の両者を含む概念である。   In the heat pump hot water supply device, when the amount of hot water in the hot water storage tank decreases below a predetermined value (that is, when the ratio of hot water in the hot water storage tank decreases below a predetermined value), the hot water runs out (that is, the ratio of hot water is close to zero). Next, it is necessary to perform “refreshing” in order to prevent the low temperature water from occupying the hot water storage tank. In addition, in the “additional cooking” referred to here, newly obtained hot water is additionally introduced into the hot water storage tank corresponding to each of the above heating methods to recover the hot water storage amount (that is, hot water in the hot water storage tank is recovered). It is a concept that includes both a mode in which the ratio is increased) and a mode in which hot water or water in the hot water storage tank is additionally heated to increase the hot water temperature to recover the hot water storage amount.

ところで、給水の加熱源として用いられるヒートポンプには、その能力が外気温に左右されるという特性があり、且つこの特性は給湯負荷(即ち、使用湯量)に対応しないものである。即ち、図5には、ヒートポンプの圧縮機を一定回転で1時間連続運転した場合における「炊上能力」の外気温に対する変化状態と、給湯負荷の外気温に対する変化状態とを示している。ここで、ヒートポンプの「炊上能力」は外気温が低いほど低下する傾向となるのに対して、給湯負荷は外気温が低いほど増加する傾向となる。従って、外気温の低い冬季においては給湯負荷が大きいにも拘わらずヒートポンプの「炊上能力」が低く、このため「追炊き」による湯量回復が間に合わず、湯切れが生じる事が懸念されるものである。これに対して、外気温の高い夏季においては給湯負荷が小さいにも拘わらずヒートポンプの「炊上能力」が高く、このため「追炊き」に対して十分な余裕をもつことになる。尚、図6には、ヒートポンプによる「炊上湯量」の外気温に対する変化状態を示したもので、図5の「炊上能力」に対応した特性となる。   By the way, the heat pump used as a heat source for supplying water has a characteristic that its ability depends on the outside air temperature, and this characteristic does not correspond to the hot water supply load (that is, the amount of hot water used). That is, FIG. 5 shows a change state of the “cooking ability” with respect to the outside air temperature and a change state of the hot water supply load with respect to the outside air temperature when the compressor of the heat pump is continuously operated at a constant rotation for 1 hour. Here, the “cooking ability” of the heat pump tends to decrease as the outside air temperature decreases, whereas the hot water supply load tends to increase as the outside air temperature decreases. Therefore, in winter when the outside air temperature is low, the heat-cooking ability of the heat pump is low despite the large hot water supply load. It is. On the other hand, in summer when the outside air temperature is high, the “cooking ability” of the heat pump is high even though the hot water supply load is small, so that there is a sufficient margin for “additional cooking”. In addition, in FIG. 6, the change state with respect to the outside temperature of the "boiled hot water amount" by a heat pump is shown, and it becomes a characteristic corresponding to the "cooking ability" of FIG.

一方、給湯負荷は、一日の中でもその時間帯によって大きく変化するものである。即ち、図7には冬季の如き外気温の低い状態における給湯負荷の時間帯による変化状態を、また図10には夏季の如き外気温の高い状態における給湯負荷の時間帯による変化状態を、それぞれ示している。図7及び図10からは、1日の時間帯における給湯負荷の変化状態は外気温の高低にはほとんど左右されず冬季でも夏季でも略同様であること、及び、1日の中では、朝食時間帯である6時〜8時の時間帯と、昼食時間帯である10時〜13時の時間帯と、夕食及び入浴時間帯である18時〜24時の時間帯に給湯負荷が集中し、特に19時〜20時の入浴時間帯において給湯負荷がピークに達すること、が判る。   On the other hand, the hot water supply load varies greatly depending on the time period of the day. That is, FIG. 7 shows a change state of the hot water supply load according to the time zone when the outside air temperature is low as in winter, and FIG. 10 shows a change state according to the time zone of the hot water supply load when the outside temperature is high as in summer. Show. From FIG. 7 and FIG. 10, the change state of the hot water supply load in the time zone of the day is almost the same in winter and summer without being influenced by the level of the outside temperature, and the breakfast time in the day The hot water supply load is concentrated in the time zone from 6 to 8 o'clock, the time zone from 10 o'clock to 13 o'clock in the lunch time zone, and from 18 o'clock to 24 o'clock in the dinner and bathing time zone, In particular, it can be seen that the hot water supply load reaches a peak in the bathing time zone from 19:00 to 20:00.

ここで、上述のようにヒートポンプの「炊上能力」は、外気温に左右され、外気温が低いほど低下することから、外気温の低い冬季においては、図8に示すように、給湯負荷がピークに達する近傍の18時〜21時の時間帯にヒートポンプを最大加熱量で3時間運転しても、図9に示すように貯湯タンクの残湯量は湯切れを起こさない程度の少量のまま推移しほとんど増加しない状態となる。また、23時〜3時の間にヒートポンプを最大加熱量で運転しておくと、朝食時間帯及び昼食時間帯における使用湯量の増加にも拘わらず、残湯量は満タンに近い量のまま推移することになる。   Here, as described above, the “cooking ability” of the heat pump depends on the outside air temperature, and decreases as the outside air temperature is low. Therefore, in winter when the outside air temperature is low, as shown in FIG. Even if the heat pump is operated at the maximum heating amount for 3 hours in the time zone from 18:00 to 21:00 near the peak, the remaining amount of hot water in the hot water storage tank remains small as shown in FIG. However, it will be in the state which hardly increases. In addition, if the heat pump is operated at the maximum heating amount between 23:00 and 3 o'clock, the amount of remaining hot water will remain almost full despite the increase in the amount of hot water used during breakfast and lunch hours. become.

これに対して、外気温の高い夏季においては、図11に示すように、給湯負荷がピークに達する近傍の18時〜21時の時間帯にヒートポンプを最大加熱量で1時間しか運転しなくても、図12に示すように貯湯タンクの残湯量は湯切れを起こさない程度の少量のまま推移し、また、23時〜24時の間にヒートポンプを最大加熱量で運転しておくと、朝食時間帯及び昼食時間帯における使用湯量の増加にも拘わらず、残湯量は満タンに近い量のまま推移することになる。   On the other hand, in the summer when the outside air temperature is high, as shown in FIG. 11, the heat pump is operated only for 1 hour at the maximum heating amount in the time zone from 18:00 to 21:00 in the vicinity of the hot water supply load reaching the peak. However, as shown in FIG. 12, the amount of hot water remaining in the hot water storage tank remains small enough not to cause hot water shortage, and if the heat pump is operated at the maximum heating amount between 23:00 and 24:00, Despite the increase in the amount of hot water used during lunch hours, the amount of remaining hot water will remain almost full.

以上のことから、ヒートポンプ給湯装置の運転制御に際しては、外気温とともに一日の時間帯をも考慮することが必要であると言える。   From the above, it can be said that in the operation control of the heat pump hot water supply apparatus, it is necessary to consider the time zone of the day as well as the outside air temperature.

さらに、ヒートポンプ給湯装置の運転制御に際しては、ヒートポンプの運転効率を考慮することも必要である。即ち、ヒートポンプには、図4に示すように、圧縮機の運転周波数に対応して運転効率が変化することが知られている。そして、運転効率は特定の運転周波数「a」においてピーク値を示し、該運転周波数「a」から外れるに従って運転効率が低下するものである。その一方、ヒートポンプの能力(炊上能力)は、圧縮機の運転周波数が高くなるほど、その力率の上昇に伴って増大する傾向にあることが知られている。   Furthermore, when controlling the operation of the heat pump water heater, it is necessary to consider the operating efficiency of the heat pump. That is, as shown in FIG. 4, it is known that the operating efficiency of the heat pump changes in accordance with the operating frequency of the compressor. The operating efficiency exhibits a peak value at a specific operating frequency “a”, and the operating efficiency decreases as the operating frequency deviates from the operating frequency “a”. On the other hand, it is known that the capacity of the heat pump (cooking capacity) tends to increase with an increase in the power factor as the operating frequency of the compressor increases.

従って、ヒートポンプ給湯装置を湯切れを生じさせることなく、且つ、より高効率で運転して省エネ性を達成するためには、圧縮機の運転周波数の変更による能力調整を、炊上能力に影響を与える外気温と1日の時間帯の双方を考慮して行うことが必要であるといえる。   Therefore, in order to achieve energy saving by operating the heat pump water heater without running out of hot water and with higher efficiency, capacity adjustment by changing the operating frequency of the compressor will affect the cooking capacity. It can be said that it is necessary to consider both the outside temperature to be given and the time zone of the day.

しかるに、上掲各公知例のヒートポンプ給湯装置においては、共に、圧縮機の能力を可変とするものの、その能力変更を外気温のみに基づいて行うもの(第1公知例)、貯湯タンク内の湯温に基づいて行うもの(第2公知例)、貯湯タンク内の湯温と1日の時間帯の双方に基づいて行うもの(第3公知例)、であって、外気温と1日の時間帯の双方に基づいて行うものではなく、従って、これら何れにおいても、湯切れの防止と省エネ性の両立という点において不満の残るものであった。   However, in each of the heat pump water heaters of the above-mentioned known examples, although the capacity of the compressor is variable, the capacity change is performed based only on the outside temperature (first known example), the hot water in the hot water storage tank What is performed based on the temperature (second known example), what is performed based on both the hot water temperature in the hot water storage tank and the time zone of the day (third known example), and the outside temperature and the time of the day It was not carried out based on both of the bands. Therefore, in any of these, dissatisfaction remained in terms of both prevention of running out of hot water and energy saving.

そこで本願発明は、湯切れ防止と省エネ性の両立をより確実ならしめたヒートポンプ給湯装置を提供することを目的としてなされたものである。   Accordingly, the present invention has been made for the purpose of providing a heat pump hot water supply apparatus that more reliably achieves both hot water prevention and energy saving.

本願発明ではかかる課題を解決するための具体的手段として次のような構成を採用している。   In the present invention, the following configuration is adopted as a specific means for solving such a problem.

本願の第1の発明では、運転周波数に基づいて能力可変とされた圧縮機11を備えたヒートポンプ加熱手段1と貯湯タンク21とを配管により接続して構成されるヒートポンプ給湯装置において、外気温を検出する外気温検出手段3と、時刻を検出する計時手段4と、上記外気温検出手段3により検出された外気温と一日の時間帯の双方に基づいて上記圧縮機11の運転周波数を変更する制御手段5とを備えたことを特徴としている。   In the first invention of the present application, in the heat pump hot water supply apparatus configured by connecting the heat pump heating means 1 including the compressor 11 whose capacity is variable based on the operating frequency and the hot water storage tank 21 by piping, the outside air temperature is set. The operating frequency of the compressor 11 is changed based on both the outside air temperature detecting means 3 for detecting, the time measuring means 4 for detecting the time, and the outside air temperature detected by the outside air temperature detecting means 3 and the time zone of the day. The control means 5 is provided.

本願の第2の発明では、上記第1の発明にかかるヒートポンプ給湯装置において、上記制御手段5により、夜間時間帯においては上記圧縮機11を高効率が得られる第1の周波数で運転することを特徴としている。   In the second invention of the present application, in the heat pump hot water supply apparatus according to the first invention, the control means 5 operates the compressor 11 at a first frequency at which high efficiency is obtained in the night time zone. It is a feature.

本願の第3の発明では、上記第1の発明にかかるヒートポンプ給湯装置において、上記制御手段5により、昼間時間帯においては上記圧縮機11の運転周波数を外気温に応じて変更設定することを特徴としている。   In the third invention of the present application, in the heat pump hot water supply apparatus according to the first invention, the control means 5 changes and sets the operating frequency of the compressor 11 in accordance with the outside air temperature during the daytime period. It is said.

本願の第4の発明では、上記第3の発明にかかるヒートポンプ給湯装置において、上記圧縮機11を、外気温が高いときには高効率が得られる第1の周波数で、外気温が低いときには該第1の周波数よりも高周波数側の第2の周波数で運転することを特徴としている。   According to a fourth invention of the present application, in the heat pump hot water supply apparatus according to the third invention, the compressor 11 has the first frequency at which high efficiency is obtained when the outside air temperature is high, and the first when the outside air temperature is low. It is characterized by operating at a second frequency that is higher than the first frequency.

本願の第5の発明では、上記第1の発明にかかるヒートポンプ給湯装置において、上記ヒートポンプ加熱手段1を循環する冷媒をCO2冷媒としたことを特徴としている。   The fifth invention of the present application is characterized in that, in the heat pump hot water supply apparatus according to the first invention, the refrigerant circulating through the heat pump heating means 1 is a CO2 refrigerant.

本願の第6の発明では、上記第1の発明にかかるヒートポンプ給湯装置において、上記圧縮機11をスイング式圧縮機としたことを特徴としている。   The sixth invention of the present application is characterized in that, in the heat pump hot water supply apparatus according to the first invention, the compressor 11 is a swing type compressor.

本願発明ではかかる構成とすることにより次のような効果が得られる。   In the present invention, the following effects can be obtained by adopting such a configuration.

(1) 本願の第1の発明にかかるヒートポンプ給湯装置によれば、運転周波数に基づいて能力可変とされた圧縮機11を備えたヒートポンプ加熱手段1と貯湯タンク21とを配管により接続して構成されるヒートポンプ給湯装置において、外気温を検出する外気温検出手段3と、時刻を検出する計時手段4と、上記外気温検出手段3により検出された外気温と一日の時間帯の双方に基づいて上記圧縮機11の運転周波数を変更する制御手段5とを備えているので、上記ヒートポンプ加熱手段1の炊上能力は外気温に大きく影響され、また給湯負荷は1日の時間帯において変化するものであり、さらに上記ヒートポンプ加熱手段1の運転効率は上記圧縮機の運転周波数に応じて変化するものであることからして、上記圧縮機11の運転周波数を外気温と一日の時間帯の双方に基づいて変更してその運転形態を高効率運転と高能力運転との間で選択することで、給湯負荷と上記ヒートポンプ加熱手段1の炊上能力とのアンバランスが可及的に解消され該アンバランスに起因する湯切れが確実に防止されるとともに、上記ヒートポンプ加熱手段1が必要以上の炊上能力で運転されることがなくその省エネ運転が実現されることになる。   (1) According to the heat pump hot water supply apparatus according to the first invention of the present application, the heat pump heating means 1 including the compressor 11 whose capacity is variable based on the operating frequency and the hot water storage tank 21 are connected by piping. In the heat pump water heater to be used, the outside air temperature detecting means 3 for detecting the outside air temperature, the time measuring means 4 for detecting the time, and the outside air temperature detected by the outside air temperature detecting means 3 and the time zone of one day. And the control means 5 for changing the operating frequency of the compressor 11, the cooking capacity of the heat pump heating means 1 is greatly influenced by the outside air temperature, and the hot water supply load changes in the time zone of one day. Furthermore, since the operating efficiency of the heat pump heating means 1 varies depending on the operating frequency of the compressor, the operating frequency of the compressor 11 By changing on the basis of both the outside air temperature and the time of the day and selecting the operation mode between high efficiency operation and high capacity operation, the hot water supply load and the cooking capacity of the heat pump heating means 1 The unbalance is eliminated as much as possible, and the hot water caused by the unbalance is surely prevented, and the heat pump heating means 1 is not operated with the cooking capacity more than necessary, and the energy saving operation is realized. Will be.

(2) 本願の第2の発明にかかるヒートポンプ給湯装置によれば、上記第1の発明にかかるヒートポンプ給湯装置において、夜間時間帯、即ち、一般的に、給湯負荷が少なく且つ比較的長時間をかけて貯湯することができる時間帯では、上記圧縮機11を高効率が得られる第1の周波数で運転するようにしているので、上記(1)における省エネ運転の実現という効果がより一層促進されるものである。   (2) According to the heat pump hot water supply apparatus according to the second invention of the present application, in the heat pump hot water supply apparatus according to the first invention, the nighttime period, that is, generally, the load for hot water supply is small and the time is relatively long. In the time zone in which hot water can be stored over time, the compressor 11 is operated at the first frequency at which high efficiency can be obtained. Therefore, the effect of realizing the energy saving operation in (1) is further promoted. Is.

(3) 本願の第3の発明にかかるヒートポンプ給湯装置によれば、上記第1の発明にかかるヒートポンプ給湯装置において、昼間時間帯、即ち、夜間時間帯に比べて給湯負荷が大きく湯切れ防止という要求が大きい時間帯では、上記圧縮機11の運転周波数、即ち、上記ヒートポンプ加熱手段1の「炊上能力」を、該「炊上能力」に大きく影響する外気温に応じて変更設定するようにしているので、上記(1)における湯切れの防止という効果がさらに確実ならしめられる。   (3) According to the heat pump hot water supply apparatus according to the third invention of the present application, in the heat pump water heater according to the first invention, the hot water supply load is large compared to the daytime period, that is, the nighttime period, and it is said that hot water prevention is prevented. In the time zone when the demand is high, the operating frequency of the compressor 11, that is, the “cooking ability” of the heat pump heating means 1 is changed and set according to the outside air temperature that greatly affects the “cooking ability”. Therefore, the effect of preventing hot water shortage in the above (1) can be further ensured.

また、夜間時間帯で、昼間時間帯よりも安い夜間電気料金で貯湯タンク21を高温湯で満タンにする際には、夜間8時間で満タンにすれば良いので、上記圧縮機11を高効率が得られる第1の運転周波数で運転することにより、省エネ運転が実現されるものである。   In addition, when the hot water storage tank 21 is filled with high-temperature hot water at nighttime hours and at a lower nighttime electricity rate than the daytime time zone, it is sufficient to fill the tank in 8 hours at night. An energy-saving operation is realized by operating at the first operating frequency at which efficiency is obtained.

(4) 本願の第4の発明にかかるヒートポンプ給湯装置によれば、上記第3の発明にかかるヒートポンプ給湯装置において、上記圧縮機11を、外気温が高いときには高効率が得られる第1の周波数で、外気温が低いときには該第1の周波数よりも高周波数側の第2の周波数で運転するようにしているので、外気温が高いとき、即ち、上記ヒートポンプ加熱手段1の炊上能力そのものが高いときには、上記圧縮機11を第1の周波数で高効率運転しても給湯能力には余裕があり湯切れが生じるおそれがなく、また外気温が低いとき、即ち、上記ヒートポンプ加熱手段1の炊上能力そのものが低いときには上記圧縮機11を第1の周波数よりも高周波数側の第2の周波数で運転してその能力増大を図ることで湯切れの発生を確実に防止することができ、これらの相乗作用として、上記(3)における湯切れの防止という効果がより一層確実ならしめられる。   (4) According to the heat pump hot water supply apparatus according to the fourth invention of the present application, in the heat pump hot water supply apparatus according to the third invention, the compressor 11 has the first frequency at which high efficiency is obtained when the outside air temperature is high. When the outside air temperature is low, the operation is performed at the second frequency higher than the first frequency. Therefore, when the outside air temperature is high, that is, the cooking capacity itself of the heat pump heating means 1 is When the compressor 11 is high, the hot water supply capacity is sufficient even when the compressor 11 is operated at high efficiency at the first frequency, and there is no risk of running out of hot water. When the outside air temperature is low, that is, when the heat pump heating means 1 is cooked. When the upper capacity itself is low, the compressor 11 is operated at the second frequency higher than the first frequency to increase the capacity, thereby preventing the occurrence of hot water out surely. It can be, as these synergistic, effect of preventing the hot water out of the (3) is crimped if more reliably.

(5) 本願の第5の発明にかかるヒートポンプ給湯装置によれば、上記第1の発明にかかるヒートポンプ給湯装置において、上記ヒートポンプ加熱手段1を循環する冷媒をCO2冷媒としているので、該CO2冷媒は高圧冷媒であって凝縮温度が高いことから、より高温の湯を取り出すことができ、高温給湯が容易に実現できるものである。   (5) According to the heat pump hot water supply apparatus according to the fifth invention of the present application, in the heat pump hot water supply apparatus according to the first invention, the refrigerant circulating through the heat pump heating means 1 is a CO2 refrigerant. Since it is a high-pressure refrigerant and has a high condensation temperature, hot water can be taken out and hot water can be easily supplied.

(6) 本願の第6の発明にかかるヒートポンプ給湯装置によれば、上記第1の発明にかかるヒートポンプ給湯装置において、上記圧縮機11をスイング式圧縮機としているので、該スイング式圧縮機には、例えばローリングピストン式圧縮機のような潤滑性の点から高速回転に限界があるとか、スクロール式圧縮機のような漏れ損失が大きく低速回転に限界がある、等の問題がなく、運転周波数の変更幅をより大きく取ることができ、その結果として、ヒートポンプ加熱手段1の炊上能力のより一層の増大によって、湯切れ防止効果がさらに促進されることになる。   (6) According to the heat pump hot water supply apparatus according to the sixth invention of the present application, in the heat pump hot water supply apparatus according to the first invention, since the compressor 11 is a swing type compressor, the swing type compressor includes For example, there is no problem such as that there is a limit to high-speed rotation from the viewpoint of lubricity like a rolling piston compressor, or there is a limit to low-speed rotation with a large leakage loss like a scroll compressor, The change width can be made larger, and as a result, the hot water prevention effect is further promoted by further increasing the cooking capacity of the heat pump heating means 1.

以下、本願発明を好適な実施形態に基づいて具体的に説明する。   Hereinafter, the present invention will be specifically described based on preferred embodiments.

図1には、本願発明の実施形態にかかるヒートポンプ給湯装置Zのシステム図を示している。このヒートポンプ給湯装置Zは、次述するヒートポンプ加熱手段1と貯湯・給湯手段2とで構成される。   In FIG. 1, the system diagram of the heat pump hot-water supply apparatus Z concerning embodiment of this invention is shown. This heat pump hot water supply apparatus Z is composed of a heat pump heating means 1 and hot water storage / hot water supply means 2 described below.

上記ヒートポンプ加熱手段1は、圧縮式冷凍回路で構成されるものであって、運転周波数の選択によってその能力を変更可能とされた電動式の圧縮機11と、凝縮器として機能し給水との間での熱交換によって給水の加熱を行う水熱交換器12と、例えば膨張弁で構成される減圧手段13と、蒸発器として機能する空気熱交換器14とを、冷媒配管31によって順次環状に接続して構成される。   The heat pump heating means 1 is composed of a compression refrigeration circuit, and is an electric compressor 11 whose capacity can be changed by selecting an operating frequency, and between the water supply functioning as a condenser. The water heat exchanger 12 that heats the feed water by heat exchange at the outlet, the decompression means 13 constituted by, for example, an expansion valve, and the air heat exchanger 14 that functions as an evaporator are sequentially connected in an annular manner by the refrigerant pipe 31 Configured.

尚、この実施形態においては、上記圧縮機11としてスイング式圧縮機を採用し、また冷媒としてCO2冷媒を採用している。   In this embodiment, a swing type compressor is adopted as the compressor 11 and a CO2 refrigerant is adopted as the refrigerant.

上記貯湯・給湯手段2は、所定容量をもつ貯湯タンク21を備えるとともに、該貯湯タンク21の底面側には分岐配管35を介して水用配管34が接続されている。この水用配管34は、その一端が水道等の給水源に、他端が上記水熱交換器12に、それぞれ接続されるとともに、上記分岐配管35と上記水熱交換器12との中間位置には水ポンプ22が備えられている。   The hot water storage / hot water supply means 2 includes a hot water storage tank 21 having a predetermined capacity, and a water pipe 34 is connected to the bottom surface side of the hot water storage tank 21 via a branch pipe 35. One end of the water pipe 34 is connected to a water supply source such as a water supply, the other end is connected to the water heat exchanger 12, and the water pipe 34 is at an intermediate position between the branch pipe 35 and the water heat exchanger 12. Is provided with a water pump 22.

さらに、上記水熱交換器12と上記貯湯タンク21の天面側との間は貯湯用の第1湯用配管32によって、また該貯湯タンク21の天面と給湯栓(図示省略)との間は給湯用の第2湯用配管33によって、それぞれ接続されている。また、上記貯湯タンク21の側壁部の下部寄り位置には第1温度検出手段TH1が、上部寄り位置には第2温度検出手段TH2が、それぞれ設けられている。尚、この第1温度検出手段TH1は、所定温度以上の高温湯が満タンに近い状態にあることを検知するためのものであり、また第2温度検出手段TH2は湯切れを生じない必要最少限の湯量の有無を検知するためのものであって、これら各温度検出手段TH1,TH2の検出信号はそれぞれ運転制御要素として次述の制御器5に入力される。   Further, a first hot water pipe 32 for storing hot water is provided between the water heat exchanger 12 and the hot water storage tank 21 and between the top of the hot water storage tank 21 and a hot water tap (not shown). Are connected by a second hot water pipe 33 for hot water supply. A first temperature detecting means TH1 is provided near the lower side of the side wall of the hot water storage tank 21, and a second temperature detecting means TH2 is provided near the upper side. The first temperature detecting means TH1 is for detecting that hot water of a predetermined temperature or higher is nearly full, and the second temperature detecting means TH2 is the minimum necessary to prevent hot water from running out. This is for detecting the presence or absence of a limited amount of hot water, and the detection signals of these temperature detection means TH1 and TH2 are respectively input to the controller 5 as operation control elements.

上記制御器5は、特許請求の範囲の「制御手段」に該当し、ヒートポンプ給湯装置Zの運転制御を行うものであって、該制御器5には上記各温度検出手段TH1,TH2の検出信号の外に、外気温検出手段3により検知される外気温信号と計時手段4により検知される現在時刻とがそれぞれ入力され、これら各入力信号に基づいて上記圧縮機11に制御信号を出力しその運転周波数を適宜変更設定するものである。   The controller 5 corresponds to the “control means” in the claims, and controls the operation of the heat pump water heater Z. The controller 5 includes detection signals from the temperature detection means TH1 and TH2. In addition, the outside air temperature signal detected by the outside air temperature detecting means 3 and the current time detected by the time measuring means 4 are input, respectively, and a control signal is output to the compressor 11 based on these input signals. The operating frequency is appropriately changed and set.

以下、上記制御器5によるヒートポンプ給湯装置Zの運転制御を図2に示すフローチャートに基づいて説明する。   Hereinafter, the operation control of the heat pump water heater Z by the controller 5 will be described based on the flowchart shown in FIG.

先ず、説明の都合上、図3に示すマップに基づいて、上記制御器5による運転制御の基本思想を説明する。この実施形態においては、先ず、ヒートポンプ加熱手段1の炊上能力に及ぼす外気温の影響を考慮して、ヒートポンプ給湯装置Zの使用環境を、炊上能力が低くなる冬季等の外気温の低い環境と、炊上能力が高くなる夏季等の外気温の高い環境とに区分している。さらに、ヒートポンプ給湯装置Zに対する給湯負荷が一日の時間帯よって変化することを考慮して、一日24時間を給湯負荷の高い昼間時間帯(7時〜23時)と給湯負荷の低い夜間時間帯(23時〜7時)とに区分している。   First, for the convenience of explanation, the basic concept of operation control by the controller 5 will be described based on the map shown in FIG. In this embodiment, first, in consideration of the influence of the outside air temperature on the cooking capacity of the heat pump heating means 1, the use environment of the heat pump hot water supply device Z is set to an environment where the outside air temperature is low such as in winter when the cooking capacity is low. And the environment with high outside air temperature such as summer when cooking capacity is high. Furthermore, taking into account that the hot water supply load for the heat pump hot water supply device Z varies depending on the time of the day, 24 hours a day are divided into daytime hours (7:00 to 23:00) with a high hot water supply load and night hours with a low hot water supply load. It is divided into bands (23: 00-7pm).

そして、かかる区分によれば、
(イー1)外気温が低い時の昼間時間帯では、ヒートポンプ加熱手段1の炊上能力が低いにも拘わらず給湯負荷が高く、従って、特に湯切れ防止の観点から、運転効率よりも炊上能力の増大を図る必要がある場合であり、
(ロー1)外気温が高い時の昼間時間帯では、ヒートポンプ加熱手段1の炊上能力が高いにも拘わらず給湯負荷が低いことから、炊上能力に余裕があり、従って、高効率運転による省エネ性を重視すべき場合であり、
(ハー1)夜間は、外気温が高いときも低いときもその給湯負荷は共に低く、且つ炊き上げについての時間的余裕が十分にあり、従って、高効率運転による省エネ性を重視すべき場合である。
And according to this division,
(E1) In the daytime hours when the outside air temperature is low, the hot water supply load is high even though the cooking capacity of the heat pump heating means 1 is low. When it is necessary to increase capacity,
(Low 1) In the daytime hours when the outside air temperature is high, the heating capacity of the heat pump heating means 1 is low even though the cooking capacity is high. This is where energy conservation should be emphasized.
(Har 1) At night, the hot water supply load is low both when the outside air temperature is high and low, and there is sufficient time for cooking. Therefore, energy saving by high-efficiency operation should be emphasized. is there.

このような観点から、この実施形態においては、上記圧縮機11の運転周波数を、
(イー2)外気温が低い時の昼間時間帯では、図4におけるB点、即ち、運転効率は多少落ちるもののヒートポンプ加熱手段1の能力増加が望める運転周波数「b」に設定し、
(ロー2)外気温が高い時の昼間時間帯では、図4におけるA点、即ち、運転効率が最も高い運転周波数「a」に設定し、
(ハー2)夜間では、外気温の高低に拘わらず一律に、図4におけるA点、即ち、運転効率が最も高い運転周波数「a」に設定している。
From this point of view, in this embodiment, the operating frequency of the compressor 11 is
(E2) In the daytime time zone when the outside air temperature is low, the point B in FIG. 4, that is, the operating frequency “b” at which the increase in the capacity of the heat pump heating means 1 can be expected although the operating efficiency is somewhat reduced,
(Low 2) In the daytime time zone when the outside air temperature is high, set the point A in FIG. 4, that is, the driving frequency “a” having the highest driving efficiency,
(Har 2) At night, regardless of the outside air temperature, the point A in FIG. 4, that is, the operation frequency “a” having the highest operation efficiency is set.

かかる運転周波数の設定制御によって、ヒートポンプ給湯装置Zの湯切れの防止と省エネ運転との両立を実現するものである。   By such setting control of the operating frequency, the heat pump hot water supply device Z can be prevented from running out of heat and achieve both energy saving operation.

ここで、図2のフローチャートに基づいて、上記制御器5による運転制御を具体的に説明する。   Here, based on the flowchart of FIG. 2, the operation control by the said controller 5 is demonstrated concretely.

制御開始後、先ず、ステップS1において、現在は昼間時間帯であるのかどうかを判定する。ここで、昼間時間帯ではない、即ち、夜間時間帯であると判定された場合には、ステップS2において第1温度検出手段TH1の検出値が60℃以上であるかどうか(即ち、現在、高温湯が満タン状態であるかどうか)を判定し、60℃以上である場合(即ち、満タン状態である場合)には、これ以上の貯湯は必要でないため、ヒートポンプ給湯装置Zの運転を停止させる(ステップS11)。これに対して、60℃以下である場合には、貯湯量の増大を図るべくヒートポンプ給湯装置Zの運転を開始させる(ステップS3)が、その際、現在は夜間時間帯であるので上記圧縮機11の運転周波数を高効率点(即ち、図4のA点)に設定し、高効率運転させる。   After the start of control, first, in step S1, it is determined whether or not the present day is a daytime time zone. Here, if it is determined that it is not the daytime period, that is, it is the nighttime period, whether or not the detected value of the first temperature detection means TH1 is 60 ° C. or higher in step S2 (that is, the current high temperature). Whether or not the hot water is in a full tank state) is determined, and if it is 60 ° C. or higher (that is, if it is in a full tank state), no further hot water storage is required, so the operation of the heat pump water heater Z is stopped. (Step S11). On the other hand, when the temperature is 60 ° C. or lower, the operation of the heat pump hot water supply device Z is started to increase the amount of stored hot water (step S3). The operation frequency of 11 is set to a high efficiency point (that is, point A in FIG. 4), and high efficiency operation is performed.

一方、ステップS1において、現在は昼間時間帯であると判定された場合には、さらにステップS4において、風呂給湯前であるかどうか、即ち、給湯負荷の急増が生じ得る状態かどうかを判定する。ここで、風呂給湯前(即ち、急激な給湯負荷の増大は生じない状態)と判定された場合には、さらにステップS8において、第1温度検出手段TH1の検出値が60℃以上であるかどうか(即ち、現在、高温湯が満タン状態であるかどうか)を判定し、60℃以上である場合(即ち、満タン状態である場合)には、これ以上の貯湯は必要でないため、ヒートポンプ給湯装置Zの運転を停止させる(ステップS11)。これに対して、第1温度検出手段TH1の検出値が60℃以下である場合には、貯湯量の増大を図るべくヒートポンプ給湯装置Zの運転を開始させる(ステップS9)が、その際、給湯負荷が小さいので、上記圧縮機11の運転周波数を高効率点(即ち、図4のA点)に設定し、高効率運転させる。   On the other hand, if it is determined in step S1 that it is currently in the daytime time zone, it is further determined in step S4 whether or not it is before bath hot water supply, that is, whether or not a rapid increase in hot water supply load can occur. Here, if it is determined before hot water supply in the bath (that is, a state in which a rapid increase in hot water supply load does not occur), whether or not the detected value of the first temperature detection means TH1 is 60 ° C. or higher in step S8. (I.e., whether hot hot water is currently full) or not, if it is 60 ° C. or higher (that is, if it is full), no further hot water storage is required, so heat pump hot water supply The operation of the device Z is stopped (step S11). On the other hand, when the detected value of the first temperature detecting means TH1 is 60 ° C. or less, the operation of the heat pump hot water supply device Z is started to increase the amount of stored hot water (step S9). Since the load is small, the operation frequency of the compressor 11 is set to a high efficiency point (that is, the point A in FIG. 4) to perform high efficiency operation.

また、ステップS4において、風呂給湯後であると判定された場合(即ち、風呂給湯によって残湯量が低下したと思われる場合)には、先ずステップS5において第2温度検出手段TH2の検出値が60℃以上であるかどうか(即ち、現在、高温湯が湯切れを生じない最少限貯湯量以上であるかどうか)を判定する。そして、第2温度検出手段TH2の検出値が60℃以上である場合(即ち、最少限貯湯量以上の貯湯量があり、且つ風呂給湯後であってこれ以上に大きな給湯負荷は発生しないと思われる場合)には、まだ追炊きをする必要はないものと判断し、ヒートポンプ給湯装置Zの運転を停止させる(ステップS11)。   If it is determined in step S4 that the hot water has been supplied after bath supply (that is, if the amount of remaining hot water is considered to have decreased due to bath hot water supply), first, in step S5, the detected value of the second temperature detection means TH2 is 60. It is determined whether or not the temperature is equal to or higher than ° C. (that is, whether or not the hot water is currently equal to or higher than the minimum amount of hot water that does not cause hot water shortage). If the detected value of the second temperature detecting means TH2 is 60 ° C. or higher (that is, there is a hot water storage amount that is more than the minimum hot water storage amount, and no hot water supply load greater than this occurs after hot water supply to the bath) If it is determined that it is not necessary to cook again, the operation of the heat pump water heater Z is stopped (step S11).

これに対して、第2温度検出手段TH2の検出値が60℃以下である場合には、貯湯量が最少限湯量以下に低下し、従って湯切れ防止の観点から追炊きが必要と判断される場合には、先ずステップS6において現在の外気温が20℃以下かどうか(即ち、ヒートポンプ加熱手段1の炊上能力が高い環境下であるのか低い環境下であるのか)を判定する。ここで、外気温が20℃以上であると判定された場合には、ヒートポンプ加熱手段1の炊上能力が高い環境下であって、それ以上に高い炊上能力での追炊きを必要としないため、この場合にはヒートポンプ給湯装置Zを高効率点で追炊き運転させて貯湯量の回復を図る(ステップS7)。一方、外気温が20℃以下である場合には、ヒートポンプ加熱手段1の炊上能力が低い環境下であって、湯切れ防止を最重要視すべき場合であるので、この場合には上記圧縮機11の運転周波数を高めてヒートポンプ給湯装置Zを高能力点で追炊き運転させて貯湯量の早期の回復を図る(ステップS10)。   On the other hand, when the detected value of the second temperature detecting means TH2 is 60 ° C. or less, the amount of stored hot water is reduced to a minimum amount of hot water or less, and therefore it is determined that additional cooking is necessary from the viewpoint of preventing hot water from running out. In that case, first, in step S6, it is determined whether or not the current outside air temperature is 20 ° C. or lower (that is, whether the heat pump heating means 1 is in an environment where the cooking capacity is high or low). Here, when it is determined that the outside air temperature is 20 ° C. or higher, it is in an environment where the cooking capacity of the heat pump heating means 1 is high, and no additional cooking with a higher cooking capacity is required. Therefore, in this case, the heat pump hot water supply device Z is additionally cooked at a high efficiency point to recover the amount of stored hot water (step S7). On the other hand, when the outside air temperature is 20 ° C. or less, it is an environment where the cooking capacity of the heat pump heating means 1 is low and the prevention of hot water outflow is most important. The operating frequency of the machine 11 is increased, and the heat pump hot water supply device Z is additionally cooked and operated at a high capacity point so as to recover the hot water storage amount early (step S10).

以上のように、ヒートポンプ給湯装置Zの運転制御が外気温と1日の時間帯の双方に基づいて行われることで、ヒートポンプ給湯装置Zの湯切れの防止と省エネ運転との両立が実現されるものである。   As described above, since the operation control of the heat pump hot water supply device Z is performed based on both the outside air temperature and the time period of one day, it is possible to achieve both the prevention of the heat pump hot water supply device Z from running out and the energy saving operation. Is.

尚、上記実施形態においては、給水を直接ヒートポンプ加熱手段1の水熱交換器12に導入し、ここでの熱交換により得られた湯を貯湯タンク21に貯湯する方式のものを例にとって説明しているが、本願発明はかかる方式のものに限定されるものではなく、例えば、貯湯タンク21とヒートポンプ加熱手段1の水熱交換器12との間で水を循環させて湯を得る方式とか、ヒートポンプ加熱手段1側に設けた加熱用熱交換器を貯湯タンク21内に配置し該貯湯タンク21内の水を加熱する方式等、種々の方式のものを採用し得ることは勿論である。   In the above embodiment, an example of a system in which water is directly introduced into the water heat exchanger 12 of the heat pump heating means 1 and hot water obtained by the heat exchange is stored in the hot water storage tank 21 will be described as an example. However, the present invention is not limited to such a method, for example, a method of obtaining hot water by circulating water between the hot water storage tank 21 and the water heat exchanger 12 of the heat pump heating means 1, Of course, various systems such as a system in which a heat exchanger for heating provided on the heat pump heating means 1 side is disposed in the hot water storage tank 21 to heat the water in the hot water storage tank 21 can be adopted.

本願発明にかかるヒートポンプ給湯装置のシステム図である。It is a system diagram of a heat pump hot water supply apparatus according to the present invention. 図1に示したヒートポンプ給湯装置の運転制御フローチャートである。It is an operation control flowchart of the heat pump hot-water supply apparatus shown in FIG. ヒートポンプ給湯装置の運転制御における制御領域マップである。It is a control area map in operation control of a heat pump hot-water supply apparatus. ヒートポンプ給湯装置における「運転周波数−運転効率」線図である。It is an "operation frequency-operation efficiency" diagram in a heat pump hot-water supply apparatus. ヒートポンプ給湯装置における外気温に対する給湯負荷及び炊上能力の変化状態説明図である。It is a hot water supply load with respect to the external temperature in a heat pump hot-water supply apparatus, and the change state explanatory drawing of cooking capacity. ヒートポンプ給湯装置における外気温に対する炊上湯量の変化状態説明図である。It is a change state explanatory view of the amount of hot water for the outside air temperature in a heat pump hot-water supply apparatus. 冬場における一日の給湯負荷の変化状態説明図である。It is change state explanatory drawing of the hot water supply load of the day in winter. 冬場における一日のヒートポンプ加熱量の変化状態説明図である。It is change state explanatory drawing of the heat pump heating amount of the day in winter. 冬場における一日の残湯量の変化状態説明図である。It is change state explanatory drawing of the amount of remaining hot water of the day in winter. 夏場における一日の給湯負荷の変化状態説明図である。It is change state explanatory drawing of the hot water supply load of the day in summer. 夏場における一日のヒートポンプ加熱量の変化状態説明図である。It is change state explanatory drawing of the heat pump heating amount of the day in summer. 夏場における一日の残湯量の変化状態説明図である。It is change state explanatory drawing of the amount of remaining hot water of the day in summer.

符号の説明Explanation of symbols

1はヒートポンプ加熱手段、2は貯湯・給湯手段、3は外気温検出手段、4は計時手段、5は制御器、11は圧縮機、12は水熱交換器、13は減圧手段、14は空気熱交換器、21は貯湯タンク、22は水ポンプ、31〜35は配管、TH1は第1温度検出手段、TH2は、Zはヒートポンプ給湯装置である。   1 is a heat pump heating means, 2 is a hot water storage / hot water supply means, 3 is an outside air temperature detection means, 4 is a time measuring means, 5 is a controller, 11 is a compressor, 12 is a water heat exchanger, 13 is a pressure reducing means, and 14 is air A heat exchanger, 21 is a hot water storage tank, 22 is a water pump, 31 to 35 are pipes, TH1 is first temperature detecting means, and TH2 is a heat pump hot water supply device.

Claims (6)

運転周波数に基づいて能力可変とされた圧縮機(11)を備えたヒートポンプ加熱手段(1)と貯湯タンク(21)とを配管により接続して構成されるヒートポンプ給湯装置であって、
外気温を検出する外気温検出手段(3)と、時刻を検出する計時手段(4)と、上記外気温検出手段(3)により検出された外気温と一日の時間帯の双方に基づいて上記圧縮機(11)の運転周波数を変更する制御手段(5)とを備えたことを特徴とするヒートポンプ給湯装置。
A heat pump hot water supply apparatus configured by connecting a heat pump heating means (1) including a compressor (11) whose capacity is variable based on an operation frequency and a hot water storage tank (21) by piping,
Based on both the outside air temperature detecting means (3) for detecting the outside air temperature, the time measuring means (4) for detecting the time, and the outside air temperature detected by the outside air temperature detecting means (3) and the time zone of the day. A heat pump hot-water supply apparatus comprising a control means (5) for changing an operating frequency of the compressor (11).
請求項1において、
上記制御手段(5)は、夜間時間帯においては上記圧縮機(11)を高効率が得られる第1の周波数で運転することを特徴とするヒートポンプ給湯装置。
In claim 1,
The control means (5) operates the compressor (11) at a first frequency at which high efficiency can be obtained in a night time zone.
請求項1において、
上記制御手段(5)は、昼間時間帯においては上記圧縮機(11)の運転周波数を外気温に応じて変更設定することを特徴とするヒートポンプ給湯装置。
In claim 1,
The said control means (5) changes and sets the operating frequency of the said compressor (11) according to external temperature in a daytime time slot | zone, The heat pump hot-water supply apparatus characterized by the above-mentioned.
請求項3において、
上記圧縮機(11)を、外気温が高いときには高効率が得られる第1の周波数で、外気温が低いときには該第1の周波数よりも高周波数側の第2の周波数で運転することを特徴とするヒートポンプ給湯装置。
In claim 3,
The compressor (11) is operated at a first frequency at which high efficiency is obtained when the outside air temperature is high, and at a second frequency higher than the first frequency when the outside air temperature is low. Heat pump water heater.
請求項1において、
上記ヒートポンプ加熱手段(1)を循環する冷媒がCO2冷媒であることを特徴とするヒートポンプ給湯装置。
In claim 1,
The heat pump hot water supply apparatus, wherein the refrigerant circulating through the heat pump heating means (1) is a CO2 refrigerant.
請求項1において、
上記圧縮機(11)がスイング式圧縮機であることを特徴とするヒートポンプ給湯装置。
In claim 1,
The heat pump hot-water supply apparatus, wherein the compressor (11) is a swing type compressor.
JP2005249143A 2005-08-30 2005-08-30 Heat pump hot-water supply device Pending JP2005345099A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007322066A (en) * 2006-05-31 2007-12-13 Toshiba Kyaria Kk Heat pump type water heater
JP2009168318A (en) * 2008-01-15 2009-07-30 Denso Corp Heat pump device and hot water supply device equipped with the same
JP2009236437A (en) * 2008-03-28 2009-10-15 Hitachi Appliances Inc Heat pump water heater

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JPS60182656U (en) * 1984-05-15 1985-12-04 シャープ株式会社 Heat pump type heat collection and storage device
JPS61107065A (en) * 1984-10-30 1986-05-24 三菱電機株式会社 Air-conditioning and hot-water supply heat pump device
JPH0798156A (en) * 1993-09-30 1995-04-11 Toshiba Corp Heat pump heat source type hot water supply apparatus
JPH094865A (en) * 1995-06-16 1997-01-10 Mitsubishi Electric Corp Heat pump type hot water feeding facility
JPH0968348A (en) * 1995-08-30 1997-03-11 Kyocera Corp Solar radiation sensor device

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Publication number Priority date Publication date Assignee Title
JPS60182656U (en) * 1984-05-15 1985-12-04 シャープ株式会社 Heat pump type heat collection and storage device
JPS61107065A (en) * 1984-10-30 1986-05-24 三菱電機株式会社 Air-conditioning and hot-water supply heat pump device
JPH0798156A (en) * 1993-09-30 1995-04-11 Toshiba Corp Heat pump heat source type hot water supply apparatus
JPH094865A (en) * 1995-06-16 1997-01-10 Mitsubishi Electric Corp Heat pump type hot water feeding facility
JPH0968348A (en) * 1995-08-30 1997-03-11 Kyocera Corp Solar radiation sensor device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007322066A (en) * 2006-05-31 2007-12-13 Toshiba Kyaria Kk Heat pump type water heater
JP2009168318A (en) * 2008-01-15 2009-07-30 Denso Corp Heat pump device and hot water supply device equipped with the same
JP2009236437A (en) * 2008-03-28 2009-10-15 Hitachi Appliances Inc Heat pump water heater

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