JP6111887B2 - Hot water storage system - Google Patents
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- JP6111887B2 JP6111887B2 JP2013128302A JP2013128302A JP6111887B2 JP 6111887 B2 JP6111887 B2 JP 6111887B2 JP 2013128302 A JP2013128302 A JP 2013128302A JP 2013128302 A JP2013128302 A JP 2013128302A JP 6111887 B2 JP6111887 B2 JP 6111887B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 245
- 238000011084 recovery Methods 0.000 claims description 23
- 239000011810 insulating material Substances 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000003472 neutralizing effect Effects 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 8
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 230000008014 freezing Effects 0.000 description 20
- 238000007710 freezing Methods 0.000 description 20
- 239000007789 gas Substances 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Details Of Fluid Heaters (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Description
本発明は貯湯給湯装置に関し、特に補助熱源機の潜熱回収時に発生する凝縮水の凍結を防止可能な構造を備えたものに関する。 The present invention relates to a hot water storage and hot water supply apparatus, and more particularly to a device having a structure that can prevent freezing of condensed water that occurs during the recovery of latent heat of an auxiliary heat source machine.
従来から、高温の湯水を生成して貯湯し、所望の給湯先に供給可能な貯湯給湯装置が実用に供されている。この種の貯湯給湯装置は、湯水を貯留する為の貯湯タンク、各種の弁部材や各種の配管類、貯湯タンクに貯留されている湯水温度が低い場合等に加熱する為の補助熱源機、これら機器を内蔵した外装ケース、外部の主熱源機等を備えている。 2. Description of the Related Art Conventionally, hot water storage and hot water supply devices that can generate hot water and store hot water and supply it to a desired hot water supply destination have been put to practical use. This type of hot water storage and hot water supply equipment includes a hot water storage tank for storing hot water, various valve members and various piping, an auxiliary heat source machine for heating when the temperature of the hot water stored in the hot water storage tank is low, etc. It has an external case with built-in equipment, an external main heat source, and the like.
上記の補助熱源機において、排気の顕熱を利用する顕熱回収用熱交換器を備えた燃焼装置だけでなく、熱効率の向上を図る為に、顕熱回収用熱交換器による熱交換後の排気の潜熱を利用する潜熱回収用熱交換器を備えた潜熱回収型の燃焼装置も実用化されている。 In the above auxiliary heat source machine, not only a combustion apparatus equipped with a sensible heat recovery heat exchanger that utilizes sensible heat of exhaust gas, but also after heat exchange by a sensible heat recovery heat exchanger in order to improve thermal efficiency. A latent heat recovery type combustion apparatus equipped with a latent heat recovery heat exchanger that uses the latent heat of exhaust gas has also been put into practical use.
ところで、上記の潜熱回収用熱交換器で発生する凝縮水は、排気成分が溶け込み酸性度が高くなるので、中和してから機外に排出する必要がある。このため、外装ケースの内部には、凝縮水を中和する為の中和器が配置されている。この中和器は、アルカリ性の中和剤が充填されると共に、排気ガスが機外に漏出しないように内部に凝縮水が滞留される。 By the way, the condensed water generated in the above-described latent heat recovery heat exchanger dissolves exhaust components and has high acidity. Therefore, the condensed water needs to be neutralized and then discharged outside the apparatus. For this reason, the neutralizer for neutralizing condensed water is arrange | positioned inside the exterior case. This neutralizer is filled with an alkaline neutralizing agent, and condensed water is retained therein so that the exhaust gas does not leak out of the apparatus.
しかし、寒冷地や冬場等では、外気温度が低下して貯留された凝縮水が凍結すると、中和器が破損してしまう虞がある。この問題を解決する為に、例えば、特許文献１のドレン容器（中和器）は、凍結防止用のヒータを備え、気温又は水温の低下した場合、ヒータを駆動してドレン容器を加熱することで、凝縮水の凍結を防止する技術が開示されている。 However, in cold regions and winters, the neutralizer may be damaged if the condensed water stored by freezing of the outside air temperature decreases. In order to solve this problem, for example, the drain container (neutralizer) of Patent Document 1 includes a heater for preventing freezing, and when the temperature or water temperature decreases, the heater is driven to heat the drain container. Thus, a technique for preventing freezing of condensed water is disclosed.
しかし、特許文献１のドレン容器では、凍結防止用のヒータを追加的に設置する構造上、部品点数が増加し、コスト高となる。また、中和器は、酸性の凝縮水を一時的に貯留する為に腐食に強い合成樹脂から形成されているので、中和器内の凝縮水を効率良く加熱することができない。ヒータによる加熱量を増大させると、消費電力が増加してしまい、貯湯給湯装置の省エネルギー性に欠けるという問題がある。 However, in the drain container of Patent Document 1, the number of parts is increased due to the structure in which a heater for preventing freezing is additionally installed, resulting in an increase in cost. Moreover, since the neutralizer is formed of a synthetic resin that is resistant to corrosion in order to temporarily store acidic condensed water, the condensed water in the neutralizer cannot be efficiently heated. When the amount of heating by the heater is increased, power consumption increases and there is a problem that the energy saving property of the hot water storage hot water supply device is lacking.
本発明の目的は、貯湯給湯装置において、凍結防止用のヒータを設置しなくて凝縮水の凍結を防止可能なもの、製作コストを低減すると共に省エネルギー性の向上を図ったもの、等を提供することである。 An object of the present invention is to provide a hot water storage and hot water supply device that can prevent freezing of condensed water without installing a heater for preventing freezing, a device that reduces manufacturing costs and improves energy saving, and the like. That is.
請求項１の貯湯給湯装置は、湯水を貯留する為の貯湯タンクと、この貯湯タンク内の湯水温度が低い場合に加熱する為の燃焼式の補助熱源機であって燃焼排気の潜熱を回収する潜熱回収用熱交換器を有する補助熱源機とを備えた貯湯給湯装置において、前記潜熱回収用熱交換器で発生した凝縮水を貯留する為の貯留槽を備え、この貯留槽は前記貯湯タンクと伝熱可能に設けられていることを特徴としている。 The hot water storage hot water supply apparatus according to claim 1 is a hot water storage tank for storing hot water and a combustion auxiliary heat source for heating when the hot water temperature in the hot water storage tank is low, and recovers the latent heat of the combustion exhaust gas. A hot water storage hot water supply apparatus including an auxiliary heat source device having a latent heat recovery heat exchanger, the hot water storage apparatus includes a storage tank for storing condensed water generated in the latent heat recovery heat exchanger, and the storage tank includes the hot water storage tank and It is characterized by being capable of heat transfer.
請求項２の貯湯給湯装置は、請求項１の発明において、前記貯留槽は、酸性の凝縮水を中和する為の中和器であることを特徴としている。 A hot water storage and hot water supply apparatus according to a second aspect is characterized in that, in the invention according to the first aspect, the storage tank is a neutralizer for neutralizing acidic condensed water.
請求項３の貯湯給湯装置は、請求項１又は２の発明において、前記貯湯タンクの周囲に断熱材が設けられ、前記貯留槽は、前記断熱材に覆われるように配置されていることを特徴としている。 According to a third aspect of the present invention, there is provided the hot water storage hot water supply apparatus according to the first or second aspect, wherein a heat insulating material is provided around the hot water storage tank, and the storage tank is disposed so as to be covered with the heat insulating material. It is said.
請求項４の貯湯給湯装置は、請求項１〜３の何れか１項の発明において、前記貯留槽は、前記貯湯タンクの下部の外周面に近接状に配置されていることを特徴としている。 A hot water storage and hot water supply apparatus according to a fourth aspect is characterized in that, in the invention according to any one of the first to third aspects, the storage tank is disposed in proximity to an outer peripheral surface of a lower portion of the hot water storage tank.
請求項１の発明によれば、潜熱回収用熱交換器で発生した凝縮水を貯留する為の貯留槽を備え、この貯留槽は貯湯タンクと伝熱可能に設けられているので、寒冷地や冬場等では、貯湯タンクの熱を利用して貯留槽を加熱することで、貯留槽内の凝縮水の凍結を防止することができる。 According to the first aspect of the present invention, the storage tank for storing the condensed water generated in the latent heat recovery heat exchanger is provided, and this storage tank is provided so as to be able to transfer heat with the hot water storage tank. In winter and the like, freezing of condensed water in the storage tank can be prevented by heating the storage tank using the heat of the hot water storage tank.
従って、凍結防止用のヒータを設置しなくても、凝縮水の凍結を防止することができるので、製作コストを低減することができると共に、凍結防止の為に余分な電力を消費しないので、貯湯給湯装置の省エネルギー化を図ることができる。 Therefore, it is possible to prevent freezing of condensed water without installing a freezing prevention heater, so that the manufacturing cost can be reduced and no extra power is consumed to prevent freezing. Energy saving of the hot water supply device can be achieved.
請求項２の発明によれば、貯留槽は、酸性の凝縮水を中和する為の中和器であるので、既存の中和器を利用することで凝縮水の凍結防止の為の構造を容易に実現できる。 According to the invention of claim 2, since the storage tank is a neutralizer for neutralizing acidic condensate, a structure for preventing condensation water from freezing can be obtained by using an existing neutralizer. It can be easily realized.
請求項３の発明によれば、貯湯タンクの周囲に断熱材が設けられ、貯留槽は、断熱材に覆われるように配置されているので、貯湯タンクと貯留槽とを同時に保温可能となり、貯留槽内の凝縮水が凍結する虞がさらに低くなる。 According to the invention of claim 3, since the heat insulating material is provided around the hot water storage tank and the storage tank is arranged so as to be covered with the heat insulating material, the hot water storage tank and the storage tank can be kept warm at the same time, The possibility of the condensed water in the tank freezing is further reduced.
請求項４の発明によれば、貯留槽は、貯湯タンクの下部の外周面に近接状に配置されているので、貯留槽から凝縮水を排水する際に貯湯タンクの上部から熱を無駄に逃がすのを防止し、貯湯タンク内の湯水の温度成層を乱さない。貯湯タンクの下部の湯水温度が低い場合、従来では外部に排出されていた凝縮水の熱を貯湯タンクの下部に与えることもある。 According to invention of Claim 4, since the storage tank is arrange | positioned close to the outer peripheral surface of the lower part of a hot water storage tank, when draining condensed water from a storage tank, heat is released from the upper part of a hot water storage tank wastefully. This prevents the temperature stratification of the hot water in the hot water tank. When the hot water temperature in the lower part of the hot water tank is low, the heat of the condensed water that has been discharged to the outside may be given to the lower part of the hot water tank.
以下、本発明を実施するための形態について実施例に基づいて説明する。 Hereinafter, modes for carrying out the present invention will be described based on examples.
先ず、本発明の貯湯給湯装置１の全体構成について説明する。
図１に示すように、貯湯給湯装置１は、湯水を貯留する貯湯タンク５を備えた貯湯タンクユニット２、外部の主熱源機として貯湯タンク５の湯水の加熱を行うヒートポンプユニット３、貯湯給湯装置１を制御する制御ユニット４、貯湯タンクユニット２とヒートポンプユニット３との間に湯水を循環させる循環用配管８等から構成されている。
First, the whole structure of the hot water storage hot-water supply apparatus 1 of this invention is demonstrated.
As shown in FIG. 1, a hot water storage hot water supply apparatus 1 includes a hot water storage tank unit 2 having a hot water storage tank 5 for storing hot water, a heat pump unit 3 for heating hot water in the hot water storage tank 5 as an external main heat source, and a hot water storage hot water supply apparatus. 1 includes a control unit 4 for controlling 1, a circulation pipe 8 for circulating hot water between the hot water storage tank unit 2 and the heat pump unit 3, and the like.
次に、貯湯タンクユニット２について説明する。
図１に示すように、貯湯タンクユニット２は、縦長筒状の外周面を有する貯湯タンク５、各種の配管６，７，８、貯湯タンク５に貯留された湯水の温度が低い場合に加熱する燃焼式の補助熱源機１０、湯水循環ポンプ１１、開閉弁１２、混合弁１３、主制御ユニット１６、外装ケース１７等を備えている。
Next, the hot water storage tank unit 2 will be described.
As shown in FIG. 1, the hot water storage tank unit 2 is heated when the temperature of the hot water stored in the hot water storage tank 5, the various pipes 6, 7, 8 and the hot water storage tank 5 is low. A combustion type auxiliary heat source device 10, a hot water circulation pump 11, an on-off valve 12, a mixing valve 13, a main control unit 16, an outer case 17, and the like are provided.
貯湯タンク５は、ヒートポンプユニット３で加熱された高温の湯水（例えば、８０〜９０℃）を貯留するものである。貯湯タンク５には、複数の温度センサ５ａ〜５ｄが高さ方向所定間隔おきの位置に配置され、温度センサ５ａ〜５ｄの温度検出信号が主制御ユニット１６に供給される。 The hot water storage tank 5 stores hot hot water (for example, 80 to 90 ° C.) heated by the heat pump unit 3. In the hot water storage tank 5, a plurality of temperature sensors 5 a to 5 d are arranged at predetermined intervals in the height direction, and temperature detection signals from the temperature sensors 5 a to 5 d are supplied to the main control unit 16.
貯湯タンク５の周囲は、断熱材９で覆われている。断熱材９は、例えば、発泡ポリプロピレン、発泡ポリスチレン等からなる合成樹脂発泡体製の成形材であって、貯湯タンク５の周囲を覆って貯湯タンク５に貯留された温水の放熱を防ぐ断熱機能を有するものである。 The hot water storage tank 5 is covered with a heat insulating material 9. The heat insulating material 9 is a molding material made of a synthetic resin foam made of, for example, foamed polypropylene, foamed polystyrene, etc., and has a heat insulating function that covers the periphery of the hot water storage tank 5 and prevents heat from being stored in the hot water storage tank 5. It is what you have.
給水配管６は、上水源から低温の上水を貯湯タンク５に供給するものであり、上流端が上水源に接続され、下流端が貯湯タンク５の下部に接続されている。給水配管６には、貯湯タンク５へ水道水を供給する為の開閉弁１２が設けられており、通常は開閉弁１２が開弁されていて、水道水を貯湯タンク５内に供給するようになっている。 The water supply pipe 6 supplies low-temperature clean water from a clean water source to the hot water storage tank 5, and has an upstream end connected to the clean water source and a downstream end connected to a lower portion of the hot water storage tank 5. The water supply pipe 6 is provided with an open / close valve 12 for supplying tap water to the hot water storage tank 5. Normally, the open / close valve 12 is opened so that tap water is supplied into the hot water storage tank 5. It has become.
出湯配管７は、貯湯タンク５内に貯湯された湯水を給湯栓１７等の所望の給湯先に供給するものであり、高温の湯水が流れる上流出湯通路７ａ、水と高温の湯水が混合された混合湯水が流れる下流出湯通路７ｂを有し、下流出湯通路７ｂの下流端が給湯栓１７に接続されている。上流出湯通路７ａと下流出湯通路７ｂとの間には混合弁１３が設置され、この混合弁１３に給水配管６から分岐したバイパス配管１４が接続されている。混合弁１３は、出湯温度が指令温度になるように水と高温の湯水の混合比を制御するものである。 The hot water supply pipe 7 supplies hot water stored in the hot water storage tank 5 to a desired hot water supply destination such as a hot water tap 17 and the like, and an upper outflow hot water passage 7a through which hot hot water flows and water and hot hot water are mixed. Further, a lower effluent hot water passage 7 b through which the mixed hot water flows is connected, and a downstream end of the lower effluent hot water passage 7 b is connected to the hot water tap 17. A mixing valve 13 is installed between the upper effluent water passage 7 a and the lower effluent water passage 7 b, and a bypass pipe 14 branched from the water supply pipe 6 is connected to the mixing valve 13. The mixing valve 13 controls the mixing ratio of water and hot hot water so that the hot water temperature becomes the command temperature.
循環加熱回路８は、貯湯タンク５とヒートポンプ式熱源機２０の給湯用熱交換器２２との間に湯水を循環させる閉回路であり、往き側通路８ａ、戻り側通路８ｂを有し、往き側通路８ａの上流端が貯湯タンク５の下部に接続され、戻り側通路８ｂの下流端が貯湯タンク５の上部に接続されている。往き側通路８ａには、湯水循環ポンプ１１が設置されている。戻り側通路８ｂから戻された高温の湯水を貯湯タンク５内に貯留し、給湯時には貯湯タンク５内の高温の湯水を出湯配管７に供給することができる。 The circulation heating circuit 8 is a closed circuit that circulates hot water between the hot water storage tank 5 and the hot water supply heat exchanger 22 of the heat pump heat source machine 20, and has a forward side passage 8a and a return side passage 8b. The upstream end of the passage 8 a is connected to the lower part of the hot water storage tank 5, and the downstream end of the return side passage 8 b is connected to the upper part of the hot water storage tank 5. A hot water circulation pump 11 is installed in the outward passage 8a. Hot hot water returned from the return side passage 8b can be stored in the hot water storage tank 5, and hot hot water in the hot water storage tank 5 can be supplied to the hot water supply pipe 7 during hot water supply.
次に、補助熱源機１０について説明する。
図１に示すように、補助熱源機１０が、出湯配管７の下流出湯通路７ｂの途中部分に設けられている。この補助熱源機１０は、燃焼用空気を供給する為の送風ファン１０ａ、燃料ガスを燃焼させるバーナーユニット１０ｂ、燃焼ガスの主として顕熱を回収する顕熱回収用熱交換器１０ｃ、顕熱回収後の燃焼排気ガスの主として潜熱を回収する潜熱回収用熱交換器１０ｄ等を備え、燃料ガスを燃焼して湯水の加熱を行う公知のガス給湯器で構成されている。
Next, the auxiliary heat source device 10 will be described.
As shown in FIG. 1, the auxiliary heat source device 10 is provided in the middle part of the lower outlet hot water passage 7 b of the hot water piping 7. This auxiliary heat source unit 10 includes a blower fan 10a for supplying combustion air, a burner unit 10b for burning fuel gas, a sensible heat recovery heat exchanger 10c for recovering mainly sensible heat of the combustion gas, and after sensible heat recovery This is comprised of a known gas water heater that includes a latent heat recovery heat exchanger 10d that mainly recovers the latent heat of the combustion exhaust gas, and burns the fuel gas to heat the hot water.
補助熱源機１０は、貯湯タンク５内の湯水温度が設定温度以下の場合等の特別な場合に限り、主制御ユニット１６から指令が送信されて燃焼作動され、下流出湯通路７ｂを流れる湯水を再加熱するものである。補助熱源機１０に供給された湯水は、潜熱回収用熱交換器１０ｄにおいて燃焼排気ガスの潜熱により加熱された後、顕熱回収用熱交換器１０ｃに供給され、その顕熱回収用熱交換器１０ｃにより加熱された後、出湯される。 The auxiliary heat source unit 10 is combusted by receiving a command from the main control unit 16 only in special cases such as when the hot water temperature in the hot water storage tank 5 is lower than the set temperature, and the hot water flowing through the lower effluent hot water passage 7b. It is to reheat. The hot water supplied to the auxiliary heat source unit 10 is heated by the latent heat of the combustion exhaust gas in the latent heat recovery heat exchanger 10d, and then supplied to the sensible heat recovery heat exchanger 10c, and the sensible heat recovery heat exchanger. After being heated by 10c, the hot water is discharged.
潜熱回収用熱交換器１０ｄの直下には、潜熱回収用熱交換器１０ｄの潜熱回収により発生した凝縮水（ドレン）を受けるトレイ１０ｅが設けられ、このトレイ１０ｅで回収された凝縮水は、ドレン管１０ｆを通って中和器３１（貯留槽に相当する）に送られる。 A tray 10e that receives condensed water (drain) generated by the latent heat recovery of the latent heat recovery heat exchanger 10d is provided immediately below the latent heat recovery heat exchanger 10d, and the condensed water recovered in the tray 10e It is sent to the neutralizer 31 (corresponding to a storage tank) through the pipe 10f.
中和器３１は、ドレン管１０ｆにより供給される酸性の凝縮水を中和して、排気ガスが機外に漏出しないように凝縮水を貯留する為のものである。中和器３１は、断面視円弧状の箱形の容器３１ａ（図２参照）、この容器３１ａ内に収容されたアルカリ性の中和剤（図示略）、前記容器３１ａ内に設置された仕切り板（図示略）等を有している。仕切り板によって内部通路が構成され、この内部通路が凝縮水によって水封可能に構成されている。中和器３１の排出口には、排水管３２の上流端が接続されている。 The neutralizer 31 neutralizes the acidic condensed water supplied from the drain pipe 10f, and stores the condensed water so that the exhaust gas does not leak outside the apparatus. The neutralizer 31 includes a box-shaped container 31a (see FIG. 2) having an arc shape in cross section, an alkaline neutralizer (not shown) accommodated in the container 31a, and a partition plate installed in the container 31a. (Not shown). An internal passage is configured by the partition plate, and the internal passage is configured to be water-sealable with condensed water. The upstream end of the drain pipe 32 is connected to the discharge port of the neutralizer 31.
外装ケース１７は、薄鋼板製の箱状に形成され、貯湯タンク５、各種の配管６，７，８、補助熱源機１０、湯水循環ポンプ１１、開閉弁１２、混合弁１３、各種の温度センサ１５ａ〜１５ｄ、主制御ユニット１６等を収容している。 The outer case 17 is formed in a box shape made of a thin steel plate, and has a hot water storage tank 5, various pipes 6, 7, 8, an auxiliary heat source unit 10, a hot water circulation pump 11, an on-off valve 12, a mixing valve 13, various temperature sensors 15a to 15d, the main control unit 16 and the like are accommodated.
次に、ヒートポンプユニット３について説明する。
図１に示すように、ヒートポンプユニット３は、圧縮機２１と、凝縮熱交換器としての給湯用熱交換器２２と、高圧の冷媒を急膨張させて温度と圧力を下げる膨張弁２３と、蒸発熱交換器としての外気熱吸収用熱交換器２４とを冷媒回路２５を介して接続して構成されたヒートポンプ式熱源機２０を備え、冷媒回路２５に収容された冷媒を利用して湯水の加熱を行う加熱循環運転を行う。
Next, the heat pump unit 3 will be described.
As shown in FIG. 1, the heat pump unit 3 includes a compressor 21, a hot water supply heat exchanger 22 as a condensation heat exchanger, an expansion valve 23 that rapidly expands a high-pressure refrigerant to lower the temperature and pressure, and evaporation A heat pump type heat source device 20 configured by connecting an external heat absorption heat exchanger 24 as a heat exchanger via a refrigerant circuit 25 is provided, and hot water is heated using the refrigerant accommodated in the refrigerant circuit 25. Perform heating circulation operation.
ヒートポンプユニット３は、さらに、送風モータ２７ａで駆動される蒸発熱交換器用の送風ファン２７と、主制御ユニット１６に接続され且つヒートポンプユニット３を制御する補助制御ユニット２８と、これらを収納する外装ケース２９等を備えている。 The heat pump unit 3 further includes a blower fan 27 for an evaporation heat exchanger driven by a blower motor 27a, an auxiliary control unit 28 that is connected to the main control unit 16 and controls the heat pump unit 3, and an outer case that houses these 29 etc.
次に、制御ユニット４について説明する。
図１に示すように、貯湯給湯装置１は、主制御ユニット１６と補助制御ユニット２８からなる制御ユニット４によって制御される。各種の温度センサ等の検出信号が制御ユニット４に送信され、この制御ユニット４により、貯湯タンクユニット２とヒートポンプユニット３の動作、各種のポンプの作動・停止、各種の弁の開閉状態の切り換え及び開度調整等を制御し、各種運転（加熱循環運転、給湯運転等）を実行する。
Next, the control unit 4 will be described.
As shown in FIG. 1, the hot water storage and hot water supply apparatus 1 is controlled by a control unit 4 including a main control unit 16 and an auxiliary control unit 28. Detection signals from various temperature sensors and the like are transmitted to the control unit 4, and the control unit 4 operates the hot water storage tank unit 2 and the heat pump unit 3, activates / stops various pumps, switches various valve open / close states, Various operations (heating circulation operation, hot water supply operation, etc.) are executed by controlling the opening degree adjustment and the like.
主制御ユニット１６は、ユーザーが操作可能な操作リモコン１９との間でデータ通信可能であり、操作リモコン１９のスイッチ操作により目標給湯温度が設定されると、その目標給湯温度データが操作リモコン１９から主制御ユニット１６に送信される。補助制御ユニット２８は、主制御ユニット１６との間でデータ通信可能であり、主制御ユニット１６からの指令に従ってヒートポンプユニット３の各種機器（圧縮機２１、膨張弁２３、送風モータ２７ａ等）の駆動制御を行う。 The main control unit 16 can perform data communication with the operation remote controller 19 that can be operated by the user. When the target hot water temperature is set by operating the switch of the operation remote controller 19, the target hot water temperature data is transferred from the operation remote controller 19. It is transmitted to the main control unit 16. The auxiliary control unit 28 is capable of data communication with the main control unit 16 and drives various devices (the compressor 21, the expansion valve 23, the blower motor 27a, etc.) of the heat pump unit 3 in accordance with instructions from the main control unit 16. Take control.
次に、本発明に係る中和器３１の貯湯タンク５に対する設置構造について説明する。
図１，図２に示すように、中和器３１は、貯湯タンク５の下部の外周面に沿うように近接状に配置され、貯湯タンク５と伝熱可能に設けられている。即ち、中和器３１と貯湯タンク５は、中和器３１に貯留されている凝縮水と貯湯タンク５に貯留されている湯水とが熱交換可能となるように配置されている。
Next, an installation structure for the hot water storage tank 5 of the neutralizer 31 according to the present invention will be described.
As shown in FIGS. 1 and 2, the neutralizer 31 is disposed close to the outer peripheral surface of the lower part of the hot water storage tank 5 and is provided so as to be able to transfer heat with the hot water storage tank 5. That is, the neutralizer 31 and the hot water storage tank 5 are arranged so that heat can be exchanged between the condensed water stored in the neutralizer 31 and the hot water stored in the hot water storage tank 5.
図２に示すように、断熱材９の下部の内周側には、断面視円弧状の凹欠け部９ａがタンク側に臨むように形成され、この凹欠け部９ａに中和器３１が収納されている。即ち、中和器３１は、タンク側を除く周囲が断熱材９で覆われるように配置されている。ドレン管１０ｆと排水管３２は、断熱材９を貫通して中和器３１に夫々接続されている。 As shown in FIG. 2, a concave notch 9a having a circular arc shape in section is formed on the inner peripheral side of the lower portion of the heat insulating material 9 so as to face the tank side, and the neutralizer 31 is accommodated in the notch 9a. Has been. That is, the neutralizer 31 is disposed so that the periphery except the tank side is covered with the heat insulating material 9. The drain pipe 10f and the drain pipe 32 penetrate the heat insulating material 9 and are connected to the neutralizer 31, respectively.
尚、中和器３１の設置箇所は、貯湯タンク５の下部に限定せず、貯湯タンク５の中段部から下端部にかけての領域に設置されても良く、タンク側周面が、貯湯タンク５の下部の外周面に円弧接触状となるように配置されても良い。 The installation location of the neutralizer 31 is not limited to the lower part of the hot water storage tank 5, and may be installed in the region from the middle stage to the lower end of the hot water storage tank 5. You may arrange | position so that it may become a circular arc contact shape on the outer peripheral surface of a lower part.
次に、本発明の貯湯給湯装置１の作用及び効果について説明する。
補助熱源機１０の稼動に伴い、中和器３１には潜熱回収用熱交換器１０ｄの潜熱回収により発生した凝縮水がドレン管１０ｆを通って徐々に貯留される。ここで、例えば、寒冷地や冬場等では、外気温度が低下すると凝縮水が凍結してしまう虞があるが、中和器３１が、貯湯タンク５と伝熱可能に設けられているので、貯湯タンク５の凍結する虞がない湯水の熱が凝縮水に伝熱され、凝縮水の凍結を防止する。
Next, the operation and effect of the hot water storage and hot water supply apparatus 1 of the present invention will be described.
Along with the operation of the auxiliary heat source unit 10, the neutralizer 31 gradually stores the condensed water generated by the latent heat recovery of the latent heat recovery heat exchanger 10d through the drain pipe 10f. Here, for example, in cold regions and winter, condensed water may freeze when the outside air temperature decreases. However, since the neutralizer 31 is provided so as to be able to transfer heat to the hot water storage tank 5, The heat of hot water that does not cause the tank 5 to freeze is transferred to the condensed water, thereby preventing the condensed water from freezing.
ところで、貯湯タンク５の下部の湯水は、加熱循環運転後や給湯運転後の残水等により低温の場合がある。一方、凝縮水の温度は、発生時には３０〜４０℃程度であり、中和器３１が、貯湯タンク５の下部の外周面に近接状に配置されているので、貯湯タンク５の下部の湯水の温度が低い場合、凝縮水の熱が貯湯タンク５の下部の湯水に伝熱され、湯水の温度が上昇する。 By the way, the hot water in the lower part of the hot water storage tank 5 may be low in temperature due to residual water after the heating circulation operation or the hot water supply operation. On the other hand, the temperature of the condensed water is about 30 to 40 ° C. when generated, and the neutralizer 31 is disposed close to the outer peripheral surface of the lower part of the hot water storage tank 5. When the temperature is low, the heat of the condensed water is transferred to the hot water in the lower part of the hot water storage tank 5, and the temperature of the hot water rises.
以上説明したように、潜熱回収用熱交換器１０ｄで発生した凝縮水を貯留する為の中和器３１（貯留槽）を備え、この中和器３１は貯湯タンク５と伝熱可能に設けられているので、寒冷地や冬場等では、貯湯タンク５の熱を利用して中和器３１を加熱することで、中和器３１内の凝縮水の凍結を防止することができる。 As described above, the neutralizer 31 (storage tank) for storing the condensed water generated in the latent heat recovery heat exchanger 10d is provided, and the neutralizer 31 is provided so as to be able to transfer heat to the hot water storage tank 5. Therefore, in cold districts, winter seasons, etc., the neutralizer 31 is heated using the heat of the hot water storage tank 5, so that the condensed water in the neutralizer 31 can be prevented from freezing.
従って、凍結防止用のヒータを設置しなくても、凝縮水の凍結を防止することができるので、製作コストを低減することができると共に、凍結防止の為に余分な電力を消費しないので、貯湯給湯装置１の省エネルギー化を図ることができる。 Therefore, it is possible to prevent freezing of condensed water without installing a freezing prevention heater, so that the manufacturing cost can be reduced and no extra power is consumed to prevent freezing. Energy saving of the hot water supply device 1 can be achieved.
また、中和器３１は、酸性の凝縮水を中和する為の中和器であるので、既存の中和器３１を利用することで凝縮水の凍結防止の為の構造を容易に実現できる。 Moreover, since the neutralizer 31 is a neutralizer for neutralizing acidic condensed water, a structure for preventing the condensed water from freezing can be easily realized by using the existing neutralizer 31. .
さらに、貯湯タンク５の周囲に断熱材９が設けられ、中和器３１は、断熱材９に覆われるように配置されているので、貯湯タンク５と中和器３１とを同時に保温可能となり、中和器３１内の凝縮水が凍結する虞がさらに低くなる。 Furthermore, since the heat insulating material 9 is provided around the hot water storage tank 5 and the neutralizer 31 is disposed so as to be covered with the heat insulating material 9, the hot water storage tank 5 and the neutralizer 31 can be kept warm at the same time. The possibility of the condensed water in the neutralizer 31 freezing is further reduced.
加えて、中和器３１は、貯湯タンクの下部の外周面に近接状に配置されているので、中和器３１から凝縮水を排水する際に貯湯タンク５の上部から熱を無駄に逃がすのを防止し、貯湯タンク５内の湯水の温度成層を乱さない。貯湯タンク５の下部の湯水温度が低い場合、従来では外部に排出されていた凝縮水の熱を貯湯タンク５の下部に与えることもある。 In addition, since the neutralizer 31 is disposed close to the outer peripheral surface of the lower part of the hot water storage tank, when draining the condensed water from the neutralizer 31, heat is wasted from the upper part of the hot water storage tank 5 wastefully. And the temperature stratification of the hot water in the hot water storage tank 5 is not disturbed. When the hot water temperature in the lower part of the hot water storage tank 5 is low, the heat of the condensed water that has been discharged to the outside may be given to the lower part of the hot water storage tank 5.
次に、前記実施例を部分的に変更した例について説明する。
［１］図３に示すように、貯湯タンク５の下部の外周面には、凝縮水を中和して貯留する為のコイル状の中和器３１Ａが近接状に設置されている。コイル状の中和器３１Ａは、可撓性の有る管部材から巻径が同径の螺旋状に構成されている。中和器３１Ａの管部材には、中和剤が充填されている。
Next, an example in which the above embodiment is partially changed will be described.
[1] As shown in FIG. 3, a coil-shaped neutralizer 31 </ b> A for neutralizing and storing condensed water is installed on the outer peripheral surface of the lower portion of the hot water storage tank 5. The coil-shaped neutralizer 31 </ b> A is formed in a spiral shape having the same winding diameter from a flexible tube member. The tube member of the neutralizer 31A is filled with a neutralizing agent.
コイル状の中和器３１Ａの上流側端部には、ドレン管１０ｆの下流端が接続され、コイル状の中和器３１Ａの下流側端部には、排水管３２の上流端が接続されている。中和器３１Ａは、断熱材９で覆われるように配置されている。この構造によれば、中和器３１Ａの省スペース化を図れるので、貯湯給湯装置１（貯湯タンクユニット２）の小型化を図ることができる。尚、中和器３１，３１Ａの形状は特に限定する必要はなく、貯湯タンク５と伝熱可能であれば、種々の形状を採用可能である。 The downstream end of the drain pipe 10f is connected to the upstream end of the coiled neutralizer 31A, and the upstream end of the drain pipe 32 is connected to the downstream end of the coiled neutralizer 31A. Yes. The neutralizer 31 </ b> A is arranged so as to be covered with the heat insulating material 9. According to this structure, space saving of the neutralizer 31A can be achieved, so that the hot water storage hot water supply apparatus 1 (hot water storage tank unit 2) can be downsized. The shape of the neutralizers 31 and 31A is not particularly limited, and various shapes can be adopted as long as heat transfer with the hot water storage tank 5 is possible.
［２］前記実施例において、貯湯タンクユニット２とヒートポンプユニット３とは別体に構成しているが、特にこの構造に限定する必要はなく、貯湯タンクユニット２とヒートポンプユニット３とを一体的に構成したものであっても良い。この構造の場合、補助熱源機１０で発生した凝縮水を排水する為の排水管と蒸発熱交換器で発生した凝縮水を排水する為の配管とを一体化することで、施工コストを低減することができる。 [2] In the above-described embodiment, the hot water storage tank unit 2 and the heat pump unit 3 are configured separately. However, the structure is not particularly limited to this, and the hot water storage tank unit 2 and the heat pump unit 3 are integrally formed. It may be configured. In the case of this structure, the construction cost is reduced by integrating the drain pipe for draining the condensed water generated in the auxiliary heat source unit 10 and the pipe for draining the condensed water generated in the evaporative heat exchanger. be able to.
［３］前記実施例において、中和器３１が貯留槽に相当するものとしているが、この構造に限定する必要はなく、凝縮水を中和する中和器とは別に、凝縮水を貯留可能な貯留槽を貯湯タンク５と伝熱可能となるように別途設置した構造であって良い。 [3] In the above embodiment, the neutralizer 31 corresponds to the storage tank, but it is not necessary to limit to this structure, and the condensed water can be stored separately from the neutralizer that neutralizes the condensed water. A separate storage tank may be separately installed so as to be able to transfer heat to the hot water storage tank 5.
［４］前記実施例において、外部の主熱源機としてヒートポンプユニット２を採用しているが、特にこれに限定する必要はなく、その他の熱源機（例えば、燃料電池発電装置等）を採用しても良い。 [4] In the above embodiment, the heat pump unit 2 is adopted as an external main heat source machine. However, the heat pump unit 2 is not particularly limited to this, and other heat source machines (for example, a fuel cell power generator or the like) are adopted. Also good.
［５］その他、当業者であれば、本発明の趣旨を逸脱することなく、前記実施例に種々の変更を付加した形態で実施可能であり、本発明はそのような変更形態を包含するものである。 [5] In addition, those skilled in the art can implement the present invention in various forms with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. It is.
１ 貯湯給湯装置
５ 貯湯タンク
９ 断熱材
１０ 補助熱源機
１０ｄ 潜熱回収用熱交換器
３１ 中和器
DESCRIPTION OF SYMBOLS 1 Hot water storage hot water supply apparatus 5 Hot water storage tank 9 Heat insulating material 10 Auxiliary heat source machine 10d Heat exchanger 31 for latent heat recovery 31 Neutralizer
Claims (4)
前記潜熱回収用熱交換器で発生した凝縮水を貯留する為の貯留槽を備え、この貯留槽は前記貯湯タンクと伝熱可能に設けられていることを特徴とする貯湯給湯装置。 A hot water storage tank for storing hot water and a combustion type auxiliary heat source for heating when the hot water temperature in the hot water tank is low, and an auxiliary device having a heat exchanger for recovering latent heat of combustion exhaust gas In a hot water storage hot water supply device equipped with a heat source machine,
A hot water storage and hot water supply apparatus comprising a storage tank for storing condensed water generated in the latent heat recovery heat exchanger, the storage tank being provided to be able to transfer heat to the hot water storage tank.
前記貯留槽は、前記断熱材に覆われるように配置されていることを特徴とする請求項１又は２に記載の貯湯給湯装置。 A heat insulating material is provided around the hot water storage tank,
The hot water storage and hot water supply apparatus according to claim 1 or 2, wherein the storage tank is disposed so as to be covered with the heat insulating material.
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