JP2000346447A - Heat pump hot-water supplier - Google Patents
Heat pump hot-water supplierInfo
- Publication number
- JP2000346447A JP2000346447A JP15328099A JP15328099A JP2000346447A JP 2000346447 A JP2000346447 A JP 2000346447A JP 15328099 A JP15328099 A JP 15328099A JP 15328099 A JP15328099 A JP 15328099A JP 2000346447 A JP2000346447 A JP 2000346447A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- outside air
- discharge temperature
- air temperature
- discharge
- 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 108
- 239000003507 refrigerant Substances 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 24
- 230000006837 decompression Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000007599 discharging Methods 0.000 abstract 6
- 238000010586 diagram Methods 0.000 description 13
- 230000002159 abnormal effect Effects 0.000 description 10
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は貯湯式のヒートポン
プ給湯機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply type heat pump water heater.
【０００２】[0002]
【従来の技術】従来のこの種のヒートポンプ給湯機は特
開昭６０−１６４１５７号公報に示すようなものがあ
る。図１４は従来のヒートポンプ給湯機の構成説明図で
ある。図１４において、圧縮機１、冷媒対水熱交換器
２、減圧装置３、蒸発器４からなる冷媒循環回路と、貯
湯槽５、循環ポンプ６、前記冷媒対水熱交換器２、補助
加熱器７を接続した給湯回路からなり前記圧縮機１より
吐出された高温高圧の過熱ガス冷媒は前記冷媒対水熱交
換器２に流入し、ここで前記循環ポンプ６から送られて
きた水を加熱する。そして、凝縮液化した冷媒は前記減
圧装置３で減圧され、前記蒸発器４に流入し、ここで大
気熱を吸熱して蒸発ガス化し、前記圧縮機１に戻る。一
方、前記冷媒対水熱交換器２で加熱された湯は前記貯湯
槽５の上部に流入し、上から次第に貯湯されていく。そ
して、前記冷媒対水熱交換器２の入口水温が設定値に達
すると水温度検出手段８が検知し、前記圧縮機１による
ヒートポンプ運転を停止して、前記補助加熱器７の単独
運転に切り換えるものである。2. Description of the Related Art A conventional heat pump water heater of this kind is disclosed in Japanese Patent Application Laid-Open No. 60-164157. FIG. 14 is a diagram illustrating the configuration of a conventional heat pump water heater. In FIG. 14, a refrigerant circulation circuit including a compressor 1, a refrigerant / water heat exchanger 2, a pressure reducing device 3, and an evaporator 4, a hot water tank 5, a circulation pump 6, the refrigerant / water heat exchanger 2, an auxiliary heater The high-temperature and high-pressure superheated gas refrigerant discharged from the compressor 1 flows into the refrigerant-to-water heat exchanger 2 and heats the water sent from the circulation pump 6. . Then, the condensed and liquefied refrigerant is decompressed by the decompression device 3 and flows into the evaporator 4 where it absorbs atmospheric heat to evaporate and return to the compressor 1. On the other hand, the hot water heated by the refrigerant / water heat exchanger 2 flows into the upper portion of the hot water storage tank 5 and is gradually stored from above. When the inlet water temperature of the refrigerant-to-water heat exchanger 2 reaches a set value, the water temperature detecting means 8 detects the temperature, stops the heat pump operation by the compressor 1, and switches to the independent operation of the auxiliary heater 7. Things.
【０００３】[0003]
【発明が解決しようとする課題】上記図１４に示す従来
例のヒートポンプ給湯機では、減圧装置３としてキャピ
ラリーチューブや温度式膨張弁を用いていた。減圧装置
３としてキャピラリーチューブを用いる場合、一般的
に、冷媒循環量の多い夏季の温度条件を基準にキャピラ
リーチューブの仕様を設計する。そのため、夏季以外の
特に給湯負荷の大きい冬季には運転の効率が悪くなると
いう課題を有していた。また、同様に夏季以外の特に外
気温度の低い冬季には冷媒循環回路に必要以上の冷媒が
循環するため、圧縮機１に液冷媒が吸い込まれ、その結
果、液圧縮となり圧縮機の耐久性が悪くなるという課題
を有していた。In the conventional heat pump water heater shown in FIG. 14, a capillary tube and a temperature type expansion valve are used as the pressure reducing device 3. When a capillary tube is used as the pressure reducing device 3, the specifications of the capillary tube are generally designed on the basis of summer temperature conditions where the refrigerant circulation amount is large. Therefore, there has been a problem that the operation efficiency is deteriorated especially in winter when the hot water supply load is large other than in summer. Similarly, in the winter season when the outside air temperature is low other than the summer season, more refrigerant than necessary is circulated in the refrigerant circulation circuit, so that the liquid refrigerant is sucked into the compressor 1, and as a result, the liquid is compressed and the durability of the compressor is reduced. There was a problem of getting worse.
【０００４】他方、減圧装置３として温度式膨張弁を用
いる場合、一般的に、蒸発器４の出口の冷媒は過熱度が
とれた過熱ガス状態となるように、減圧装置３としての
温度式膨張弁の仕様を設計する。そのため、設計した外
気温度よりも高い時には吐出圧力が上昇したり、外気温
度の低い冬季には吐出温度が上昇したりして圧縮機の耐
久性が悪くなるという課題を有していた。また、冬季に
おいて蒸発器４に着霜したときも、蒸発器４の出口の冷
媒状態を過熱度がとれるように制御するため、いっそう
着霜が進み、運転の効率が悪くなるという課題を有して
いた。On the other hand, when a temperature-type expansion valve is used as the pressure reducing device 3, generally, the refrigerant at the outlet of the evaporator 4 becomes a superheated gas state with a high degree of superheat, so that the temperature-dependent expansion valve as the pressure reducing device 3 is used. Design valve specifications. For this reason, there has been a problem that the discharge pressure increases when the temperature is higher than the designed outside air temperature, and the discharge temperature increases in winter when the outside air temperature is low, so that the durability of the compressor deteriorates. In addition, even when frost forms on the evaporator 4 in winter, the refrigerant at the outlet of the evaporator 4 is controlled so that the degree of superheat can be obtained. I was
【０００５】本発明の目的は圧縮機の異常温度上昇なら
びに異常圧力上昇がない、効率の良い給湯加熱運転を実
現することである。An object of the present invention is to realize an efficient hot water supply heating operation without an abnormal temperature rise and abnormal pressure rise of the compressor.
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
するため、圧縮機、冷媒対水熱交換器、減圧装置、蒸発
器を順次接続した冷媒循環回路と、貯湯槽、循環ポン
プ、前記冷媒対水熱交換器を順次接続した給湯回路と、
圧縮機の吐出温度が外気温度を検出する外気温度検出手
段と、前記圧縮機の吐出温度を検出する吐出温度検出手
段と、外気温度に対して予め設定された目標吐出温度に
なるように減圧装置の開度を制御する制御手段とを具備
したものである。According to the present invention, there is provided a refrigerant circuit having a compressor, a refrigerant-to-water heat exchanger, a pressure reducing device, and an evaporator connected in sequence, a hot water tank, a circulation pump, A hot water supply circuit in which refrigerant-to-water heat exchangers are sequentially connected,
Outside air temperature detection means for detecting the outside air temperature of the compressor, discharge temperature detection means for detecting the discharge temperature of the compressor, and a pressure reducing device such that the outside air temperature becomes a preset target discharge temperature. And a control means for controlling the opening degree.
【０００７】また、外気温度が高いときには、圧縮機の
吐出圧力が、圧力検出手段からの信号によって予め設定
された常用最大吐出圧力を越えないように、減圧装置の
開度を制御する制御手段を具備したものである。When the outside air temperature is high, the control means for controlling the opening of the pressure reducing device is controlled so that the discharge pressure of the compressor does not exceed the normal maximum discharge pressure set in advance by a signal from the pressure detection means. It is provided.
【０００８】また、外気温度が低いときには、圧縮機の
吐出温度が、吐出温度検出手段からの信号によって予め
設定された常用最大吐出温度を越えないように、減圧装
置の開度を制御する制御手段を具備したものである。When the outside air temperature is low, the control means controls the opening degree of the pressure reducing device so that the discharge temperature of the compressor does not exceed a normal maximum discharge temperature set in advance by a signal from the discharge temperature detecting means. It is provided with.
【０００９】上記発明において、外気温度に対して給湯
運転の効率が最も良い吐出温度を予め求めておいて、こ
れを目標吐出温度として設定する。そして、給湯運転を
行う場合に外気温度と圧縮機の吐出温度とを検出して、
圧縮機の吐出温度をこの目標吐出温度になるように減圧
装置の開度を制御するので、年間を通じて、効率の良い
給湯加熱運転ができる。In the above invention, the discharge temperature at which the efficiency of the hot water supply operation is best with respect to the outside air temperature is determined in advance, and this is set as the target discharge temperature. Then, when performing the hot water supply operation, the outside air temperature and the discharge temperature of the compressor are detected,
Since the opening of the pressure reducing device is controlled so that the discharge temperature of the compressor becomes the target discharge temperature, efficient hot water supply heating operation can be performed throughout the year.
【００１０】また、圧力検出手段からの信号によって、
常用最大吐出圧力を越えないように、減圧装置の開度を
制御するので、圧縮機の異常圧力上昇がない。また、吐
出温度検出手段からの信号によって、常用最大吐出温度
を越えないように、減圧装置の開度を制御するので、圧
縮機の異常温度上昇がなくて、耐久性の高いヒートポン
プ給湯機が実現できる。Further, according to a signal from the pressure detecting means,
Since the opening of the pressure reducing device is controlled so as not to exceed the normal maximum discharge pressure, there is no abnormal increase in the pressure of the compressor. In addition, since the opening of the pressure reducing device is controlled so as not to exceed the normal maximum discharge temperature based on the signal from the discharge temperature detection means, there is no abnormal temperature rise of the compressor and a highly durable heat pump water heater is realized. it can.
【００１１】[0011]
【発明の実施の形態】本発明は各請求項に記載の形態で
実施できるものであり、請求項１記載のように、圧縮
機、冷媒対水熱交換器、減圧装置、蒸発器を順次接続し
た冷媒循環回路と、貯湯槽、循環ポンプ、前記冷媒対水
熱交換器を順次接続した給湯回路と、圧縮機の吐出温度
が外気温度を検出する外気温度検出手段と、前記圧縮機
の吐出温度を検出する吐出温度検出手段と、圧縮機の吐
出温度が外気温度に対して予め設定された目標吐出温度
になるように減圧装置の開度を制御する制御手段とを設
けた構成とすることにより、外気温度に対して給湯運転
の効率が最も良い吐出温度を予め求めておいて、これを
目標吐出温度として設定するので、年間を通じて、効率
の良い給湯加熱運転ができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be carried out in the form described in each claim. As described in claim 1, a compressor, a refrigerant-to-water heat exchanger, a pressure reducing device, and an evaporator are sequentially connected. A refrigerant circulation circuit, a hot water tank, a circulation pump, a hot water supply circuit in which the refrigerant-to-water heat exchanger is sequentially connected, an outside air temperature detecting means for detecting the outside air temperature of the compressor, and a discharge temperature of the compressor. And a control means for controlling the degree of opening of the pressure reducing device so that the discharge temperature of the compressor becomes a preset target discharge temperature with respect to the outside air temperature. Since the discharge temperature at which the efficiency of the hot water supply operation is best with respect to the outside air temperature is determined in advance, and this is set as the target discharge temperature, the efficient hot water supply heating operation can be performed throughout the year.
【００１２】また、請求項２記載のように、外気温度が
高いときには、圧縮機の吐出圧力が、圧力検出手段から
の信号によって予め設定された常用最大吐出圧力を越え
ないように、減圧装置の開度を制御する制御手段を設け
た構成とすることにより、圧縮機の異常圧力上昇がな
い、耐久性の高いヒートポンプ給湯機が実現できる。Further, when the outside air temperature is high, the discharge pressure of the compressor does not exceed a normal maximum discharge pressure set in advance by a signal from the pressure detecting means. By providing the control means for controlling the opening degree, a highly durable heat pump water heater can be realized without an abnormal pressure rise of the compressor.
【００１３】また、請求項３記載のように、圧力検出手
段として、外気温度検出手段と、吐出温度検出手段と、
外気温度に対する目標吐出温度を記憶している第二の記
憶手段を有するようにすることができる。According to a third aspect of the present invention, as the pressure detecting means, an outside air temperature detecting means, a discharge temperature detecting means,
A second storage means for storing the target discharge temperature with respect to the outside air temperature may be provided.
【００１４】また、請求項４記載のように、外気温度が
低いときには、圧縮機の吐出温度が、吐出温度検出手段
からの信号によって予め設定された常用最大吐出温度を
越えないように、減圧装置の開度を制御する制御手段を
設けた構成とすることにより、圧縮機の異常温度上昇が
ない、耐久性の高いヒートポンプ給湯機が実現できる。Further, when the outside air temperature is low, the pressure reducing device is arranged so that the discharge temperature of the compressor does not exceed a normal maximum discharge temperature set in advance by a signal from the discharge temperature detecting means. By providing a control means for controlling the opening of the compressor, a highly durable heat pump water heater without an abnormal rise in the temperature of the compressor can be realized.
【００１５】また、請求項５記載のように、減圧装置の
開度の下限値を有する制御手段を設けた構成とすること
により、着霜時にも減圧装置の最低の開度が維持される
ので、蒸発器４の蒸発温度の低下が押さえられて、従来
よりも効率の良い給湯加熱運転ができる。Further, by providing a control means having a lower limit of the opening of the pressure reducing device, the minimum opening of the pressure reducing device is maintained even during frost formation. In addition, the decrease in the evaporation temperature of the evaporator 4 is suppressed, and the hot water supply heating operation can be performed more efficiently than in the past.
【００１６】[0016]
【実施例】以下、本発明の実施例について図面を用いて
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１７】（実施例１）図１は本発明の実施例１のヒ
ートポンプ給湯機の構成説明図、図２は同ヒートポンプ
給湯機の減圧装置の開度に対する吐出温度と吐出圧力と
効率を示す説明図、図３は同ヒートポンプ給湯機の外気
温度に対する目標吐出温度を示す説明図である。なお、
従来例で説明した図１４と同じ構成部材には同一符号を
用い説明を省略する。(Embodiment 1) FIG. 1 is an explanatory view of the configuration of a heat pump water heater according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory diagram showing discharge temperature, discharge pressure and efficiency with respect to opening degree of a pressure reducing device of the heat pump water heater. FIG. 3 and FIG. 3 are explanatory diagrams showing the target discharge temperature with respect to the outside air temperature of the heat pump water heater. In addition,
The same components as those in FIG. 14 described in the conventional example are denoted by the same reference numerals, and description thereof is omitted.
【００１８】図１において、冷媒対水熱交換器２の水側
出口に設けられた沸き上げ温度検出手段９からの信号で
回転数制御手段１０は循環ポンプ６の回転数を制御し
て、冷媒対水熱交換器２の出口水温（沸き上げ温度）を
ほぼ一定になるように沸き上げる。また、制御手段１１
は、外気温度を検出する外気温度検出手段１２と圧縮機
１の吐出温度を検出する吐出温度検出手段１３からの信
号で減圧装置３を制御する。１４は外気温度に対する目
標吐出温度を記憶している第一の記憶手段である。な
お、減圧装置３として電動膨張弁（図示せず）等があ
る。In FIG. 1, a rotation speed control means 10 controls a rotation speed of a circulation pump 6 by a signal from a boiling temperature detecting means 9 provided at a water side outlet of the refrigerant-to-water heat exchanger 2, and The water temperature (boiling temperature) at the outlet of the water heat exchanger 2 is raised so as to be substantially constant. The control means 11
Controls the pressure reducing device 3 with signals from the outside air temperature detecting means 12 for detecting the outside air temperature and the discharge temperature detecting means 13 for detecting the discharge temperature of the compressor 1. Reference numeral 14 denotes first storage means for storing a target discharge temperature with respect to the outside air temperature. The pressure reducing device 3 includes an electric expansion valve (not shown) and the like.
【００１９】次に動作、作用について説明する。Next, the operation and operation will be described.
【００２０】図２は横軸に減圧装置３の開度をとり、縦
軸に吐出温度と吐出圧力と効率をとって、ある外気温度
の時の減圧装置３の開度に対する吐出温度と吐出圧力と
効率の関係を示したものである。同図からわかるよう
に、効率は減圧装置３の開度に対して極大値がある。ま
た、同図において、一点鎖線は圧縮機の通常使用時の最
大温度である常用最大吐出温度を示しており、二点鎖線
は圧縮機の通常使用時の最大圧力である常用最大吐出圧
力を示している。ここで、効率が極大になる減圧装置３
の開度Ｘに対する吐出温度を目標吐出温度Ｙとする。そ
して、各外気温度に対して、この目標吐出温度Ｙを求め
ると、図３のようになる。この外気温度に対する目標吐
出温度の関係を第一の記憶手段１４に予め記憶させる。In FIG. 2, the horizontal axis indicates the opening of the pressure reducing device 3, and the vertical axis indicates the discharge temperature, the discharge pressure, and the efficiency. The discharge temperature and the discharge pressure with respect to the opening of the pressure reducing device 3 at a certain outside air temperature. It shows the relationship between efficiency and efficiency. As can be seen from the figure, the efficiency has a maximum value with respect to the opening degree of the pressure reducing device 3. Also, in the same figure, the one-dot chain line indicates the normal maximum discharge temperature which is the maximum temperature during normal use of the compressor, and the two-dot chain line indicates the normal maximum discharge pressure which is the maximum pressure during normal use of the compressor. ing. Here, the decompression device 3 in which the efficiency is maximized
The discharge temperature with respect to the opening degree X is defined as a target discharge temperature Y. Then, when this target discharge temperature Y is obtained for each outside air temperature, it becomes as shown in FIG. The relationship between the outside air temperature and the target discharge temperature is stored in the first storage means 14 in advance.
【００２１】つまり、給湯運転が始まり圧縮機１が起動
すると、制御手段１１は外気温度検出手段１２と吐出温
度検出手段１３からの信号で外気温度と吐出温度とを検
出する。そして、外気温度と目標吐出温度との関係を記
憶している第一の記憶手段１４からの情報で、今の吐出
温度が目標吐出温度よりも高ければ、制御手段１１は減
圧装置３の開度を大きくする（開く方向）ように制御す
る。逆に、今の吐出温度が目標吐出温度よりも低けれ
ば、制御手段１１は減圧装置３の開度を小さくする（閉
じる方向）ように制御する。That is, when the hot water supply operation is started and the compressor 1 is started, the control means 11 detects the outside air temperature and the discharge temperature by signals from the outside air temperature detection means 12 and the discharge temperature detection means 13. If the current discharge temperature is higher than the target discharge temperature based on information from the first storage unit 14 that stores the relationship between the outside air temperature and the target discharge temperature, the control unit 11 determines the opening degree of the pressure reducing device 3. Is controlled to be larger (opening direction). Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11 controls the opening degree of the pressure reducing device 3 to be small (to close).
【００２２】上記のように、制御手段１１による吐出温
度制御をある時間毎に行えば、外気温度が変化しても常
に効率の良い給湯運転が可能となる。As described above, if the discharge temperature control by the control means 11 is performed at a certain time interval, an efficient hot water supply operation can always be performed even if the outside air temperature changes.
【００２３】（実施例２）図４は本発明の実施例２のヒ
ートポンプ給湯機の構成説明図、図５は同ヒートポンプ
給湯機の減圧装置の開度に対する吐出温度と吐出圧力と
効率を示す説明図、図６は同ヒートポンプ給湯機の外気
温度に対する吐出圧力と減圧装置の開度を示す説明図で
ある。(Embodiment 2) FIG. 4 is a view for explaining the configuration of a heat pump water heater according to Embodiment 2 of the present invention, and FIG. 5 is a view showing discharge temperature, discharge pressure and efficiency with respect to the opening degree of the pressure reducing device of the heat pump water heater. FIG. 6 and FIG. 6 are explanatory diagrams showing the discharge pressure and the opening degree of the pressure reducing device with respect to the outside air temperature of the heat pump water heater.
【００２４】本実施例において、実施例１と異なる点
は、圧縮機１の吐出側に圧力検出手段１５を設けた構成
としている点である。The present embodiment is different from the first embodiment in that a pressure detecting means 15 is provided on the discharge side of the compressor 1.
【００２５】なお、実施例１と同符号の部分は同一構成
を有し、説明は省略する。The parts denoted by the same reference numerals as those in the first embodiment have the same configuration, and a description thereof will be omitted.
【００２６】次に動作、作用について説明する。Next, the operation and operation will be described.
【００２７】図５は横軸に減圧装置３の開度をとり、縦
軸に吐出温度と吐出圧力と効率をとって、ある外気温度
の高い場合の減圧装置３の開度に対する吐出温度と吐出
圧力と効率の関係を示したものである。同図に示すよう
に、外気温度がかなり高くなると、効率が極大値になる
減圧装置３の開度において吐出圧力が常用最大吐出圧力
（例えば２．４ＭＰａ）を越えるときがある。この場
合、減圧装置３の開度をＡからＢに変更すると吐出圧力
はＣからＤに減少することになる。FIG. 5 shows the opening degree of the pressure reducing device 3 on the horizontal axis and the discharge temperature, discharge pressure and efficiency on the vertical axis, and shows the discharge temperature and discharge with respect to the opening degree of the pressure reducing device 3 when a certain outside air temperature is high. It shows the relationship between pressure and efficiency. As shown in the figure, when the outside air temperature becomes considerably high, the discharge pressure may exceed the normal maximum discharge pressure (for example, 2.4 MPa) at the opening degree of the pressure reducing device 3 at which the efficiency becomes a maximum value. In this case, when the opening of the pressure reducing device 3 is changed from A to B, the discharge pressure is reduced from C to D.
【００２８】つまり、給湯運転が始まり圧縮機１が起動
すると、制御手段１１は圧力検出手段１５からの信号で
吐出圧力を検出する。この吐出圧力が常用最大吐出圧力
（例えば２．４ＭＰａ）よりも低ければ、制御手段１１
は外気温度検出手段１２と吐出温度検出手段１３からの
信号で外気温度と吐出温度とを検出し、そして、外気温
度と目標吐出温度との関係を記憶している第一の記憶手
段１４からの情報で、今の吐出温度が目標吐出温度より
も高ければ、制御手段１１は減圧装置３の開度を大きく
する（開く方向）ように制御する。逆に、今の吐出温度
が目標吐出温度よりも低ければ、制御手段１１は減圧装
置３の開度を小さくする（閉じる方向）ように制御す
る。That is, when the hot water supply operation is started and the compressor 1 is started, the control means 11 detects the discharge pressure from the signal from the pressure detection means 15. If this discharge pressure is lower than the normal maximum discharge pressure (for example, 2.4 MPa), the control means 11
Detects the outside air temperature and the discharge temperature from the signals from the outside air temperature detection means 12 and the discharge temperature detection means 13, and outputs a signal from the first storage means 14 which stores the relationship between the outside air temperature and the target discharge temperature. According to the information, if the current discharge temperature is higher than the target discharge temperature, the control unit 11 controls the pressure reducing device 3 to increase the opening degree (opening direction). Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11 controls the opening degree of the pressure reducing device 3 to be small (to close).
【００２９】他方、圧力検出手段１５からの信号で検出
した吐出圧力が常用最大吐出圧力（例えば２．４ＭＰ
ａ）よりも高ければ、制御手段１１は減圧装置３の開度
を大きくする（開く方向）ように制御する。On the other hand, the discharge pressure detected by the signal from the pressure detecting means 15 is the normal maximum discharge pressure (for example, 2.4 MPa).
If it is higher than a), the control means 11 controls to increase the opening of the pressure reducing device 3 (opening direction).
【００３０】図６は横軸に外気温度をとり、縦軸に吐出
圧力と減圧装置３の開度をとって、外気温度に対する吐
出圧力と減圧装置３の開度の変化を示したものである。
同図において、外気温度が高くなれば、上記説明のよう
に吐出圧力による制御を行うことによって吐出圧力が常
用最大吐出圧力を越えないようにすることができるの
で、この吐出圧力制御をある時間毎に行えば、異常圧力
上昇のない給湯運転が可能となる。なお、図中の点線は
実施例１で説明した吐出温度による制御の場合であり、
記号Ａ、Ｂ、Ｃ、Ｄは図５の同記号に対応する。FIG. 6 shows the change of the discharge pressure and the opening degree of the pressure reducing device 3 with respect to the outside air temperature by taking the outside air temperature on the horizontal axis and the discharge pressure and the opening degree of the pressure reducing device 3 on the vertical axis. .
In the figure, if the outside air temperature increases, the discharge pressure can be prevented from exceeding the normal maximum discharge pressure by performing the control based on the discharge pressure as described above. , A hot water supply operation without an abnormal pressure rise becomes possible. Note that the dotted line in the figure is the case of control by the discharge temperature described in the first embodiment,
Symbols A, B, C, and D correspond to the same symbols in FIG.
【００３１】（実施例３）図７は本発明の実施例３のヒ
ートポンプ給湯機の構成説明図、図８は同ヒートポンプ
給湯機の減圧装置の開度に対する吐出温度と吐出圧力と
効率を示す説明図、図９は同ヒートポンプ給湯機の外気
温度に対する目標吐出温度を示す説明図である。(Embodiment 3) FIG. 7 is an explanatory view showing the structure of a heat pump water heater according to Embodiment 3 of the present invention, and FIG. 8 is an explanation showing discharge temperature, discharge pressure and efficiency with respect to the opening degree of the pressure reducing device of the heat pump water heater. Drawing 9 is an explanatory view showing target discharge temperature to outside air temperature of the heat pump water heater.
【００３２】本実施例において、実施例２と異なる点
は、圧力検出手段として外気温度検出手段１２と吐出温
度検出手段１３を用い、さらに第二の記憶手段１６を設
けた構成としている点である。The present embodiment is different from the second embodiment in that an outside air temperature detecting means 12 and a discharge temperature detecting means 13 are used as pressure detecting means, and a second storage means 16 is provided. .
【００３３】なお、実施例２と同符号の部分は同一構成
を有し、説明は省略する。The parts having the same reference numerals as those in the second embodiment have the same configuration, and the description will be omitted.
【００３４】次に動作、作用について説明する。Next, the operation and operation will be described.
【００３５】図８は横軸に減圧装置３の開度をとり、縦
軸に吐出温度と吐出圧力と効率をとって、ある外気温度
の高い場合の減圧装置３の開度に対する吐出温度と吐出
圧力と効率の関係を示したものである。同図に示すよう
に、外気温度がかなり高くなると、効率が極大値になる
減圧装置３の開度において吐出圧力が常用最大吐出圧力
（例えば２．４ＭＰａ）を越えるときがある。この場
合、減圧装置３の開度をＡからＢに変更すると吐出圧力
はＣからＤに減少し、吐出温度はＥからＦに減少する。
結局、同図に示す外気温度の場合には吐出圧力をＤにす
るためには吐出温度をＦにすればよいことになる。この
減圧装置３の開度Ｂに対する吐出温度を目標吐出温度Ｚ
とする。そして、各外気温度に対して、この目標吐出温
度Ｚを求めると、図９の実線のようになる。この外気温
度に対する目標吐出温度Ｚの関係を第二の記憶手段１６
に予め記憶させる。同図において、点線は実施例１で説
明した吐出温度による制御の場合であり、実線と点線の
交点の外気温度を高温側限界外気温度Ｔｕとする。FIG. 8 shows the opening degree of the pressure reducing device 3 on the horizontal axis and the discharge temperature, the discharge pressure and the efficiency on the vertical axis, and shows the discharge temperature and discharge with respect to the opening degree of the pressure reducing device 3 when a certain outside air temperature is high. It shows the relationship between pressure and efficiency. As shown in the figure, when the outside air temperature becomes considerably high, the discharge pressure may exceed the normal maximum discharge pressure (for example, 2.4 MPa) at the opening degree of the pressure reducing device 3 at which the efficiency becomes a maximum value. In this case, when the opening degree of the pressure reducing device 3 is changed from A to B, the discharge pressure decreases from C to D, and the discharge temperature decreases from E to F.
As a result, in the case of the outside air temperature shown in the figure, the discharge pressure should be set to F in order to set the discharge pressure to D. The discharge temperature for the opening B of the pressure reducing device 3 is set to the target discharge temperature Z.
And Then, when this target discharge temperature Z is obtained for each outside air temperature, it becomes as shown by the solid line in FIG. The relationship between the outside air temperature and the target discharge temperature Z is stored in the second storage unit 16.
In advance. In the figure, the dotted line indicates the case of control based on the discharge temperature described in the first embodiment, and the outside air temperature at the intersection of the solid line and the dotted line is defined as the high-temperature-side limit outside air temperature Tu.
【００３６】つまり、給湯運転が始まり圧縮機１が起動
すると、制御手段１１は外気温度検出手段１２からの信
号で外気温度を検出する。この外気温度が高温側限界外
気温度Ｔｕよりも低ければ、さらに、制御手段１１は外
気温度検出手段１２と吐出温度検出手段１３からの信号
で外気温度と吐出温度とを検出し、そして、外気温度と
目標吐出温度との関係を記憶している第一の記憶手段１
４からの情報で、今の吐出温度が目標吐出温度よりも高
ければ、制御手段１１は減圧装置３の開度を大きくする
（開く方向）ように制御する。逆に、今の吐出温度が目
標吐出温度よりも低ければ、制御手段１１は減圧装置３
の開度を小さくする（閉じる方向）ように制御する。That is, when the hot water supply operation is started and the compressor 1 is started, the control means 11 detects the outside air temperature by the signal from the outside air temperature detection means 12. If the outside air temperature is lower than the high-temperature-side limit outside air temperature Tu, the control means 11 further detects the outside air temperature and the discharge temperature from signals from the outside air temperature detection means 12 and the discharge temperature detection means 13, and Storage means 1 for storing the relationship between the temperature and the target discharge temperature
If the current discharge temperature is higher than the target discharge temperature based on the information from 4, the control unit 11 controls the pressure reducing device 3 to increase the opening degree (opening direction). Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11
Is controlled so as to reduce the opening degree (close direction).
【００３７】他方、外気温度検出手段１２からの信号で
検出した外気温度が高温側限界外気温度Ｔｕよりも高け
れば、吐出温度検出手段１３からの信号で吐出温度を検
出し、そして、第二の記憶手段１６からの情報で、今の
吐出温度が目標吐出温度よりも高ければ、制御手段１１
は減圧装置３の開度を大きくする（開く方向）ように制
御する。逆に、今の吐出温度が目標吐出温度よりも低け
れば、制御手段１１は減圧装置３の開度を小さくする
（閉じる方向）ように制御する。On the other hand, if the outside air temperature detected by the signal from the outside air temperature detecting means 12 is higher than the high temperature limit outside air temperature Tu, the discharge temperature is detected by the signal from the discharge temperature detecting means 13 and the second If the current discharge temperature is higher than the target discharge temperature based on the information from the storage unit 16, the control unit 11
Is controlled to increase the opening of the pressure reducing device 3 (opening direction). Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11 controls the opening degree of the pressure reducing device 3 to be small (to close).
【００３８】上記のように制御手段１１による吐出温度
制御をある時間毎に行えば、吐出温度による制御を行う
ことによって吐出圧力が常用最大吐出圧力を越えないよ
うにすることができるので、異常圧力上昇のない給湯運
転が可能となる。If the discharge temperature is controlled by the control means 11 at certain intervals as described above, the discharge pressure can be prevented from exceeding the normal maximum discharge pressure by controlling the discharge temperature. Hot water supply operation without rising is enabled.
【００３９】（実施例４）図１０は本発明の実施例４の
ヒートポンプ給湯機の構成説明図、図１１は同ヒートポ
ンプ給湯機の減圧装置の開度に対する吐出温度と吐出圧
力と効率を示す説明図、図１２は同ヒートポンプ給湯機
の外気温度に対する目標吐出温度を示す説明図である。(Embodiment 4) FIG. 10 is an explanatory view showing the structure of a heat pump water heater according to Embodiment 4 of the present invention, and FIG. 11 is a view showing the discharge temperature, discharge pressure and efficiency with respect to the opening degree of the pressure reducing device of the heat pump water heater. Drawing 12 is an explanatory view showing target discharge temperature to outside air temperature of the heat pump water heater.
【００４０】本実施例において、実施例１と異なる点は
第三の記憶手段１７を設けた構成としている点である。The present embodiment differs from the first embodiment in that a third storage means 17 is provided.
【００４１】なお、実施例１と同符号の部分は同一構成
を有し、説明は省略する。The parts denoted by the same reference numerals as those in the first embodiment have the same configuration, and the description is omitted.
【００４２】次に動作、作用について説明する。Next, the operation and operation will be described.
【００４３】図１１は横軸に減圧装置３の開度をとり、
縦軸に吐出温度と吐出圧力と効率をとって、ある外気温
度の低い場合の減圧装置３の開度に対する吐出温度と吐
出圧力と効率の関係を示したものである。同図に示すよ
うに、外気温度がかなり低くなると、効率が極大値にな
る減圧装置３の開度において吐出温度が常用最大吐出温
度（例えば１０５゜Ｃ）を越えるときがある。この場
合、減圧装置３の開度をＡからＢに変更すると吐出温度
はＣからＤに減少することになる。また、図１２は横軸
に外気温度をとり、縦軸に目標吐出温度をとって、外気
温度に対する目標吐出温度Ｗの関係を示したものであ
る。同図中の実線で示すように、低外気温度の場合の目
標吐出温度Ｗは常用最大吐出温度（例えば１０５゜Ｃ）
が一定となる。この外気温度に対する目標吐出温度Ｗの
関係を第三の記憶手段１７に予め記憶させる。また、同
図の点線は実施例１で説明した吐出温度による制御の場
合であり、実線と点線の交点の外気温度を低温側限界外
気温度Ｔｌとする。FIG. 11 shows the opening of the pressure reducing device 3 on the horizontal axis.
The vertical axis shows the relationship between the discharge temperature, the discharge pressure, and the efficiency with respect to the degree of opening of the pressure reducing device 3 when the discharge air temperature, the discharge pressure, and the efficiency are taken and the outside air temperature is low. As shown in the figure, when the outside air temperature becomes considerably low, the discharge temperature sometimes exceeds the normal maximum discharge temperature (for example, 105 ° C.) at the opening degree of the pressure reducing device 3 at which the efficiency becomes a maximum value. In this case, when the opening degree of the pressure reducing device 3 is changed from A to B, the discharge temperature is reduced from C to D. FIG. 12 shows the relationship between the outside air temperature and the target discharge temperature W by taking the outside air temperature on the horizontal axis and the target discharge temperature on the vertical axis. As shown by the solid line in the figure, the target discharge temperature W in the case of a low outside air temperature is a normal maximum discharge temperature (for example, 105 ° C.).
Becomes constant. The relationship between the target discharge temperature W and the outside air temperature is stored in the third storage unit 17 in advance. Also, the dotted line in the figure is the case of the control based on the discharge temperature described in the first embodiment, and the outside air temperature at the intersection of the solid line and the dotted line is defined as the lower limit side outside air temperature Tl.
【００４４】つまり、給湯運転が始まり圧縮機１が起動
すると、制御手段１１は外気温度検出手段１２からの信
号で外気温度を検出する。この外気温度が低温側限界外
気温度Ｔｌよりも高ければ、制御手段１１は吐出温度検
出手段１３からの信号で吐出温度を検出し、そして、外
気温度と目標吐出温度との関係を記憶している第一の記
憶手段１４からの情報で、今の吐出温度が目標吐出温度
よりも高ければ、制御手段１１は減圧装置３の開度を大
きくする（開く方向）ように制御する。逆に、今の吐出
温度が目標吐出温度よりも低ければ、制御手段１１は減
圧装置３の開度を小さくする（閉じる方向）ように制御
する。That is, when the hot water supply operation is started and the compressor 1 is started, the control means 11 detects the outside air temperature by the signal from the outside air temperature detection means 12. If the outside air temperature is higher than the low-temperature limit outside air temperature Tl, the control means 11 detects the discharge temperature from the signal from the discharge temperature detection means 13 and stores the relationship between the outside air temperature and the target discharge temperature. If the current discharge temperature is higher than the target discharge temperature based on the information from the first storage means 14, the control means 11 controls the pressure reducing device 3 to increase the opening degree (opening direction). Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11 controls the opening degree of the pressure reducing device 3 to be small (to close).
【００４５】他方、外気温度検出手段１２からの信号で
検出した外気温度が低温側限界外気温度Ｔｌよりも低け
れば、制御手段１１は吐出温度検出手段１３からの信号
で吐出温度を検出し、そして、外気温度と目標吐出温度
との関係を記憶している第三の記憶手段１７からの情報
で、今の吐出温度が目標吐出温度よりも高ければ、制御
手段１１は減圧装置３の開度を大きくする（開く方向）
ように制御する。逆に、今の吐出温度が目標吐出温度よ
りも低ければ、制御手段１１は減圧装置３の開度を小さ
くする（閉じる方向）ように制御する。On the other hand, if the outside air temperature detected by the signal from the outside air temperature detecting means 12 is lower than the low temperature limit outside air temperature Tl, the control means 11 detects the discharge temperature from the signal from the discharge temperature detecting means 13, and If the current discharge temperature is higher than the target discharge temperature based on information from the third storage unit 17 that stores the relationship between the outside air temperature and the target discharge temperature, the control unit 11 sets the opening degree of the pressure reducing device 3 to Increase (opening direction)
Control. Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11 controls the opening degree of the pressure reducing device 3 to be small (to close).
【００４６】上記のように制御手段１１による吐出温度
制御をある時間毎に行えば、吐出温度が常用最大吐出温
度を越えないようにすることができるので、異常温度上
昇のない給湯運転が可能となる。If the discharge temperature control by the control means 11 is performed at certain time intervals as described above, the discharge temperature can be prevented from exceeding the normal maximum discharge temperature. Become.
【００４７】（実施例５）図１３は本発明の実施例５の
ヒートポンプ給湯機の構成説明図である。(Embodiment 5) FIG. 13 is an explanatory view showing the structure of a heat pump water heater according to Embodiment 5 of the present invention.
【００４８】本実施例において、実施例１と異なる点は
減圧装置３の最小開度を記憶している最小開度記憶手段
１８を設けた構成としている点である。The present embodiment is different from the first embodiment in that a minimum opening storage means 18 for storing the minimum opening of the pressure reducing device 3 is provided.
【００４９】なお、実施例１と同符号の部分は同一構成
を有し、説明は省略する。The parts denoted by the same reference numerals as in the first embodiment have the same configuration, and the description will be omitted.
【００５０】次に動作、作用について説明する。Next, the operation and operation will be described.
【００５１】給湯運転が始まり圧縮機１が起動すると、
制御手段１１は外気温度検出手段１２と吐出温度検出手
段１３からの信号で外気温度と吐出温度とを検出する。
そして、外気温度と目標吐出温度との関係を記憶してい
る第一の記憶手段１４からの情報で、今の吐出温度が目
標吐出温度よりも高ければ、制御手段１１は減圧装置３
の開度を大きくする（開く方向）ように制御する。逆
に、今の吐出温度が目標吐出温度よりも低ければ、制御
手段１１は最小開度記憶手段１８からの信号で得た減圧
装置３の最小開度と現在の減圧装置３の開度とを比較す
る。そして、現在の減圧装置３の開度のほうが前記最小
開度よりも大きければ、減圧装置３の開度を前記最小開
度を下まわらない範囲で小さくする（閉じる方向）よう
に制御する。また、現在の減圧装置３の開度のほうが前
記最小開度よりも小さいか等しければ、減圧装置３の開
度を前記最小開度になるように制御する。When the hot water supply operation is started and the compressor 1 is started,
The control means 11 detects the outside air temperature and the discharge temperature from signals from the outside air temperature detection means 12 and the discharge temperature detection means 13.
If the current discharge temperature is higher than the target discharge temperature based on the information from the first storage means 14 storing the relationship between the outside air temperature and the target discharge temperature, the control means 11
Is controlled so as to increase the opening degree (opening direction). Conversely, if the current discharge temperature is lower than the target discharge temperature, the control means 11 compares the minimum opening degree of the pressure reducing device 3 obtained from the signal from the minimum opening degree storing means 18 with the current opening degree of the pressure reducing device 3. Compare. If the current opening of the pressure reducing device 3 is larger than the minimum opening, the opening of the pressure reducing device 3 is controlled to be reduced (closed direction) within a range not to be smaller than the minimum opening. If the current opening of the pressure reducing device 3 is smaller than or equal to the minimum opening, the opening of the pressure reducing device 3 is controlled to be the minimum opening.
【００５２】このようにすれば、外気温度が低い場合に
蒸発器４に霜が付着して吐出温度や蒸発温度が低下して
も減圧装置３の開度を必要以上に小さくすることがない
ので、効率の良い給湯加熱運転が維持できる。In this way, even when the frost adheres to the evaporator 4 when the outside air temperature is low and the discharge temperature or the evaporating temperature is lowered, the opening of the pressure reducing device 3 is not reduced unnecessarily. In addition, an efficient hot water supply heating operation can be maintained.
【００５３】[0053]
【発明の効果】以上説明したように本発明の請求項１に
係るヒートポンプ給湯機は、圧縮機、冷媒対水熱交換
器、減圧装置、蒸発器を順次接続した冷媒循環回路と、
貯湯槽、循環ポンプ、前記冷媒対水熱交換器を順次接続
した給湯回路と、圧縮機の吐出温度が外気温度を検出す
る外気温度検出手段と、前記圧縮機の吐出温度を検出す
る吐出温度検出手段と、圧縮機の吐出温度が外気温度に
対して予め設定された目標吐出温度になるように減圧装
置の開度を制御する制御手段とを設けているので、年間
を通じて、効率の良い給湯加熱運転ができるという効果
を有する。As described above, the heat pump water heater according to claim 1 of the present invention comprises a refrigerant circulation circuit in which a compressor, a refrigerant-to-water heat exchanger, a pressure reducing device, and an evaporator are sequentially connected;
A hot water supply circuit in which a hot water storage tank, a circulation pump, and the refrigerant-to-water heat exchanger are sequentially connected, an outside air temperature detecting means for detecting an outside air temperature as a discharge temperature of the compressor, and a discharge temperature detection for detecting a discharge temperature of the compressor Means and control means for controlling the opening degree of the pressure reducing device so that the discharge temperature of the compressor becomes a target discharge temperature set in advance with respect to the outside air temperature. It has the effect of being able to drive.
【００５４】また、請求項２に係るヒートポンプ給湯機
は、外気温度が高いときには、圧縮機の吐出圧力が、圧
力検出手段からの信号によって予め設定された常用最大
吐出圧力を越えないように、減圧装置の開度を制御する
制御手段を設けているので、圧縮機の異常圧力上昇がな
い、耐久性の高いヒートポンプ給湯機が実現できるとい
う効果を有する。In the heat pump water heater according to the present invention, when the outside air temperature is high, the pressure of the compressor is reduced so that the discharge pressure of the compressor does not exceed the normal maximum discharge pressure set in advance by a signal from the pressure detecting means. Since the control means for controlling the opening degree of the device is provided, there is an effect that a highly durable heat pump water heater having no abnormal pressure rise of the compressor can be realized.
【００５５】また、請求項３に係るヒートポンプ給湯機
は、圧力検出手段として、外気温度検出手段と、吐出温
度検出手段と、外気温度に対する目標吐出温度を記憶し
ている第二の記憶手段を設けているので、吐出温度を制
御することで、圧縮機の異常圧力上昇がない、耐久性の
高いヒートポンプ給湯機が実現できるという効果を有す
る。Further, the heat pump water heater according to claim 3 includes, as pressure detection means, an outside air temperature detection means, a discharge temperature detection means, and a second storage means for storing a target discharge temperature with respect to the outside air temperature. Therefore, by controlling the discharge temperature, there is an effect that it is possible to realize a highly durable heat pump water heater without abnormal pressure rise of the compressor.
【００５６】また、請求項４に係るヒートポンプ給湯機
は、外気温度が低いときには、圧縮機の吐出温度が、吐
出温度検出手段からの信号によって予め設定された常用
最大吐出温度を越えないように、減圧装置の開度を制御
する制御手段を設けているので、圧縮機の異常温度上昇
がなく、また、液圧縮のない耐久性の高いヒートポンプ
給湯機が実現できるという効果を有する。Further, in the heat pump water heater according to claim 4, when the outside air temperature is low, the discharge temperature of the compressor does not exceed the normal maximum discharge temperature set in advance by a signal from the discharge temperature detecting means. Since the control means for controlling the degree of opening of the decompression device is provided, there is an effect that there is no abnormal temperature rise of the compressor and a highly durable heat pump water heater without liquid compression can be realized.
【００５７】また、請求項５に係るヒートポンプ給湯機
は、、減圧装置の開度の下限値を有する制御手段を設け
ているので、着霜時にも減圧装置の最低の開度が維持さ
れるため、蒸発器の蒸発温度の低下が押さえられて、従
来よりも効率の良い給湯加熱運転ができる。Further, the heat pump water heater according to claim 5 is provided with the control means having the lower limit of the opening of the pressure reducing device, so that the minimum opening of the pressure reducing device is maintained even when frost is formed. Further, a decrease in the evaporation temperature of the evaporator is suppressed, and the hot water supply heating operation can be performed more efficiently than in the past.
【図１】本発明の実施例１のヒートポンプ給湯機を示す
構成説明図FIG. 1 is a configuration explanatory view showing a heat pump water heater according to a first embodiment of the present invention.
【図２】同ヒートポンプ給湯機の減圧装置の開度に対す
る吐出温度と吐出圧力と効率を示す説明図FIG. 2 is an explanatory diagram showing discharge temperature, discharge pressure, and efficiency with respect to an opening degree of a pressure reducing device of the heat pump water heater.
【図３】同ヒートポンプ給湯機の外気温度に対する目標
吐出温度を示す説明図FIG. 3 is an explanatory diagram showing a target discharge temperature with respect to an outside air temperature of the heat pump water heater.
【図４】本発明の実施例２のヒートポンプ給湯機の構成
説明図FIG. 4 is a configuration explanatory view of a heat pump water heater according to a second embodiment of the present invention.
【図５】同ヒートポンプ給湯機の減圧装置の開度に対す
る吐出温度と吐出圧力と効率を示す説明図FIG. 5 is an explanatory diagram showing discharge temperature, discharge pressure, and efficiency with respect to the opening degree of the pressure reducing device of the heat pump water heater.
【図６】同ヒートポンプ給湯機の外気温度に対する吐出
圧力と減圧装置の開度を示す説明図FIG. 6 is an explanatory diagram showing a discharge pressure and an opening degree of a pressure reducing device with respect to an outside air temperature of the heat pump water heater.
【図７】本発明の実施例３のヒートポンプ給湯機の構成
説明図FIG. 7 is a configuration explanatory view of a heat pump water heater according to a third embodiment of the present invention.
【図８】同ヒートポンプ給湯機の減圧装置の開度に対す
る吐出温度と吐出圧力と効率を示す説明図FIG. 8 is an explanatory diagram showing discharge temperature, discharge pressure, and efficiency with respect to the opening degree of the pressure reducing device of the heat pump water heater.
【図９】同ヒートポンプ給湯機の外気温度に対する目標
吐出温度を示す説明図FIG. 9 is an explanatory diagram showing a target discharge temperature with respect to an outside air temperature of the heat pump water heater.
【図１０】本発明の実施例４のヒートポンプ給湯機の構
成説明図FIG. 10 is a configuration explanatory view of a heat pump water heater according to a fourth embodiment of the present invention.
【図１１】同ヒートポンプ給湯機の減圧装置の開度に対
する吐出温度と吐出圧力と効率を示す説明図FIG. 11 is an explanatory diagram showing discharge temperature, discharge pressure, and efficiency with respect to the opening degree of the pressure reducing device of the heat pump water heater.
【図１２】同ヒートポンプ給湯機の外気温度に対する目
標吐出温度を示す説明図FIG. 12 is an explanatory diagram showing a target discharge temperature with respect to an outside air temperature of the heat pump water heater.
【図１３】本発明の実施例５のヒートポンプ給湯機の構
成説明図FIG. 13 is a configuration explanatory view of a heat pump water heater according to a fifth embodiment of the present invention.
【図１４】従来例におけるヒートポンプ給湯機の構成説
明図FIG. 14 is an explanatory diagram of a configuration of a heat pump water heater in a conventional example.
１ 圧縮機 ２ 冷媒対水熱交換器 ３ 減圧装置 ４ 蒸発器 ５ 貯湯槽 ６ 循環ポンプ １１ 制御手段 １２ 外気温度検出手段 １３ 吐出温度検出手段 １４ 第一の記憶手段 １５ 圧力検知手段 １６ 第二の記憶手段 １７ 第三の記憶手段 １８ 最小開度記憶手段 DESCRIPTION OF SYMBOLS 1 Compressor 2 Refrigerant-water heat exchanger 3 Decompression device 4 Evaporator 5 Hot water storage tank 6 Circulation pump 11 Control means 12 Outside air temperature detection means 13 Discharge temperature detection means 14 First storage means 15 Pressure detection means 16 Second storage Means 17 Third storage means 18 Minimum opening degree storage means
Claims (5)
発器を順次接続した冷媒循環回路と、貯湯槽、循環ポン
プ、前記冷媒対水熱交換器を順次接続した給湯回路と、
圧縮機の吐出温度が外気温度を検出する外気温度検出手
段と、前記圧縮機の吐出温度を検出する吐出温度検出手
段と、圧縮機の吐出温度が外気温度に対して予め設定さ
れた目標吐出温度になるように減圧装置の開度を制御す
る制御手段とを備えていることを特徴とするヒートポン
プ給湯機。1. A refrigerant circuit in which a compressor, a refrigerant-to-water heat exchanger, a decompression device, and an evaporator are sequentially connected; a hot water tank, a circulation pump, and a hot-water supply circuit in which the refrigerant-to-water heat exchanger is sequentially connected;
An outside air temperature detecting means for detecting the outside air temperature as the discharge temperature of the compressor; a discharge temperature detecting means for detecting the discharge temperature of the compressor; and a target discharge temperature wherein the discharge temperature of the compressor is preset with respect to the outside air temperature And a control means for controlling the opening of the pressure reducing device so as to obtain a heat pump water heater.
力が、圧力検出手段からの信号によって予め設定された
常用最大吐出圧力を越えないように、減圧装置の開度を
制御する制御手段を備えていることを特徴とする請求項
１記載のヒートポンプ給湯機。2. A control means for controlling the opening of the pressure reducing device so that the discharge pressure of the compressor does not exceed a normal maximum discharge pressure set in advance by a signal from the pressure detection means when the outside air temperature is high. The heat pump water heater according to claim 1, further comprising:
と、吐出温度検出手段と、外気温度に対して目標吐出温
度を記憶している第二の記憶手段とを備えていることを
特徴とする請求項２記載のヒートポンプ給湯機。3. The apparatus according to claim 1, further comprising an outside air temperature detecting means, a discharge temperature detecting means, and a second storage means for storing a target discharge temperature with respect to the outside air temperature. The heat pump water heater according to claim 2.
度が、吐出温度検出手段からの信号によって予め設定さ
れた常用最大吐出温度を越えないように、減圧装置の開
度を制御する制御手段を備えていることを特徴とする請
求項１記載のヒートポンプ給湯機。4. A control means for controlling the degree of opening of the pressure reducing device such that the discharge temperature of the compressor does not exceed a normal maximum discharge temperature set in advance by a signal from the discharge temperature detecting means when the outside air temperature is low. The heat pump water heater according to claim 1, further comprising:
を備えていることを特徴とする請求項１記載のヒートポ
ンプ給湯機。5. The heat pump water heater according to claim 1, further comprising control means having a lower limit value of the degree of opening of the pressure reducing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15328099A JP3703995B2 (en) | 1999-06-01 | 1999-06-01 | Heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15328099A JP3703995B2 (en) | 1999-06-01 | 1999-06-01 | Heat pump water heater |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005034040A Division JP3900186B2 (en) | 2005-02-10 | 2005-02-10 | Heat pump water heater |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000346447A true JP2000346447A (en) | 2000-12-15 |
| JP2000346447A5 JP2000346447A5 (en) | 2005-05-26 |
| JP3703995B2 JP3703995B2 (en) | 2005-10-05 |
Family
ID=15559028
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15328099A Expired - Fee Related JP3703995B2 (en) | 1999-06-01 | 1999-06-01 | Heat pump water heater |
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| Country | Link |
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| JP (1) | JP3703995B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090631A (en) * | 2001-09-13 | 2003-03-28 | Sanyo Electric Co Ltd | Heat pump type water heater |
| JP2007107756A (en) * | 2005-10-11 | 2007-04-26 | Denso Corp | Heat pump water heater |
| CN100443822C (en) * | 2005-03-24 | 2008-12-17 | 日立空调·家用电器株式会社 | Heat-pump hot water supply apparatus |
| JP2009041860A (en) * | 2007-08-09 | 2009-02-26 | Toshiba Carrier Corp | Control method of heat pump hot water supply device |
| JP2010127574A (en) * | 2008-11-28 | 2010-06-10 | Mitsubishi Electric Corp | Heat pump water heater, hot water storage system using the heat pump water heater, and method for determining cause of water supply suspension of the heat pump water heater |
| JP2013079760A (en) * | 2011-10-04 | 2013-05-02 | Hitachi Appliances Inc | Heat pump type liquid supply device |
| CN110848786A (en) * | 2019-12-12 | 2020-02-28 | 宁夏塞上阳光太阳能有限公司 | Integrated hybrid cycle system heat pump cooling and heating machine |
-
1999
- 1999-06-01 JP JP15328099A patent/JP3703995B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090631A (en) * | 2001-09-13 | 2003-03-28 | Sanyo Electric Co Ltd | Heat pump type water heater |
| JP4693308B2 (en) * | 2001-09-13 | 2011-06-01 | 三洋電機株式会社 | Heat pump type water heater |
| CN100443822C (en) * | 2005-03-24 | 2008-12-17 | 日立空调·家用电器株式会社 | Heat-pump hot water supply apparatus |
| JP2007107756A (en) * | 2005-10-11 | 2007-04-26 | Denso Corp | Heat pump water heater |
| JP4548298B2 (en) * | 2005-10-11 | 2010-09-22 | 株式会社デンソー | Heat pump type water heater |
| JP2009041860A (en) * | 2007-08-09 | 2009-02-26 | Toshiba Carrier Corp | Control method of heat pump hot water supply device |
| JP2010127574A (en) * | 2008-11-28 | 2010-06-10 | Mitsubishi Electric Corp | Heat pump water heater, hot water storage system using the heat pump water heater, and method for determining cause of water supply suspension of the heat pump water heater |
| JP2013079760A (en) * | 2011-10-04 | 2013-05-02 | Hitachi Appliances Inc | Heat pump type liquid supply device |
| CN110848786A (en) * | 2019-12-12 | 2020-02-28 | 宁夏塞上阳光太阳能有限公司 | Integrated hybrid cycle system heat pump cooling and heating machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3703995B2 (en) | 2005-10-05 |
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