JP2005164153A - Hot water supply device - Google Patents

Hot water supply device Download PDF

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JP2005164153A
JP2005164153A JP2003404620A JP2003404620A JP2005164153A JP 2005164153 A JP2005164153 A JP 2005164153A JP 2003404620 A JP2003404620 A JP 2003404620A JP 2003404620 A JP2003404620 A JP 2003404620A JP 2005164153 A JP2005164153 A JP 2005164153A
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hot water
water storage
storage tank
water supply
inflow
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克也 ▲桑▼木
Katsuya Kuwaki
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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 provide a hot water supply device with superior workability capable of easily carrying out drainage work of a plurality of hot water storage tanks, and regulating mixing of hot water of each hot water storage tank via a drain passage. <P>SOLUTION: The plurality of hot water storage tanks 1a and 1b are provided. Boiling up operation can be carried out of sending out low temperature water from a bottom of the hot water storage tank 1b in a water intake side, boiling up the low temperature water by a heat source unit, and sending the boiled water into a top part of the hot water storage tank 1a in a hot water supply side. The drain passage 25 is provided for sending hot water of each hot water storage tank 1a and 1b from the bottom and draining it via one drain valve 29. A regulating means S is provided in the drain passage 25 for regulating inflow of hot water from a bottom side of each hot water storage tank 1a and 1b to the bottom of the other hot water storage tank 1b or 1a via the drain passage 25. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、給湯装置に関するものである。   The present invention relates to a hot water supply apparatus.

給湯装置として、従来から貯湯タンクを備えたものがあり、さらには貯湯タンクを複数個備えたものがある(例えば、特許文献1参照)。ところで、貯湯タンクを2個備えた給湯装置は、例えば図3に記載した構成とされる。すなわち、貯湯タンク51として、給湯側貯湯タンク51aと取水側貯湯タンク51bとを備え、給湯側貯湯タンク51aの底部と取水側貯湯タンク51bの頂部とを連絡配管52で接続している。そして、取水側貯湯タンク51bの底部には図示省略の加熱源に低温水を供給するために流出配管53が接続され、給湯側貯湯タンク51aの頂部には加熱源にて加熱された高温水を貯湯タンク51aに流入させる流入配管54が接続されている。この場合、流出配管53に循環用ポンプ55が介設されている。また、各貯湯タンク51a、51bの底部にはタンク内の温水を排出するための排水管56、57が接続されている。そして、各排水管56、57には排水栓(排水バルブ)58、59が介設されている。なお、取水側貯湯タンク51bの排水管57には、排水栓59よりも上流側に取水側貯湯タンク51bに水道水を供給するための給水配管60が接続されている。   Some hot water supply apparatuses have conventionally been equipped with a hot water storage tank, and further some have a plurality of hot water storage tanks (see, for example, Patent Document 1). By the way, the hot-water supply apparatus provided with two hot water storage tanks is set as the structure described, for example in FIG. That is, the hot water storage tank 51 includes a hot water supply hot water storage tank 51a and a water intake hot water storage tank 51b, and the bottom of the hot water supply hot water storage tank 51a and the top of the intake water hot water storage tank 51b are connected by a connecting pipe 52. An outflow pipe 53 is connected to the bottom of the water intake side hot water storage tank 51b to supply low temperature water to a heating source (not shown), and hot water heated by the heat source is supplied to the top of the hot water supply side hot water storage tank 51a. An inflow pipe 54 for flowing into the hot water storage tank 51a is connected. In this case, a circulation pump 55 is interposed in the outflow pipe 53. Further, drain pipes 56 and 57 for discharging hot water in the tanks are connected to the bottoms of the hot water storage tanks 51a and 51b. The drain pipes 56 and 57 are provided with drain plugs (drain valves) 58 and 59, respectively. A water supply pipe 60 for supplying tap water to the water intake side hot water storage tank 51b is connected to the drain pipe 57 of the water intake side hot water storage tank 51b upstream of the drain plug 59.

このように構成された給湯装置では、循環用ポンプ55を駆動すると、取水側貯湯タンク51bの底部から低温水が流出し、この低温水が加熱源(例えば、ヒートポンプ式加熱源)にて加熱されて、給湯側貯湯タンク51aの頂部に流入させることになる。この際、給湯側貯湯タンク51aの下部の温水が連絡配管52を介して取水側貯湯タンク51bの上部に流入する。これによって、貯湯タンク51a、51b内に高温の温水を貯めることができる。
特開2001−263809号公報(図1)
In the hot water supply apparatus configured as described above, when the circulation pump 55 is driven, low temperature water flows out from the bottom of the intake water storage tank 51b, and this low temperature water is heated by a heating source (for example, a heat pump heating source). Thus, it flows into the top of the hot water supply side hot water storage tank 51a. At this time, the hot water in the lower part of the hot water supply side hot water storage tank 51 a flows into the upper part of the intake side hot water storage tank 51 b through the connection pipe 52. Accordingly, hot hot water can be stored in the hot water storage tanks 51a and 51b.
JP 2001-263809 A (FIG. 1)

ところで、施工時等において各貯湯タンク内の水を排水する排水工事が必要である。しかしながら、上記したように従来では、各貯湯タンクに排水管が接続され、しかも各排水管に排水栓(排水バルブ)備えている。そのため、貯湯タンクの排水を行う際、各排水バルブを操作する必要があり、作業性に劣っていた。   By the way, drainage work is required to drain the water in each hot water storage tank during construction. However, as described above, conventionally, a drain pipe is connected to each hot water storage tank, and each drain pipe is provided with a drain plug (drain valve). Therefore, when draining the hot water storage tank, it is necessary to operate each drain valve, which is inferior in workability.

この発明は、上記従来の欠点を解決するためになされたものであって、その目的は、複数の貯湯タンクの排水作業を簡単に行うことができて、施工性等に優れ、しかも排水路を介した各貯湯タンクの湯の混合を規制する給湯装置を提供することにある。   The present invention has been made to solve the above-described conventional drawbacks, and its purpose is to easily perform drainage work of a plurality of hot water storage tanks, excellent workability and the like, and to provide a drainage channel. Another object of the present invention is to provide a hot water supply device that regulates mixing of hot water in each hot water storage tank.

そこで請求項1の給湯装置は、複数の貯湯タンク1a、1bを備え、取水側貯湯タンク1bの底部から低温水を流出させて、この低温水を加熱源にて沸き上げて給湯側貯湯タンク1aの頂部に流入させる沸き上げ運転が可能な給湯装置であって、各貯湯タンク1a、1bの湯水をその底部から流出させて一つの排水弁29を介して排水する排水路25を設けると共に、各貯湯タンク1a、1bの底部側からの上記排水路25を介した他の貯湯タンク1b、1aの底部への湯の流入を規制する規制手段Sをこの排水路25に設けたことを特徴としている。   Accordingly, the hot water supply apparatus of claim 1 includes a plurality of hot water storage tanks 1a and 1b, and flows out low temperature water from the bottom of the intake side hot water storage tank 1b, boils the low temperature water with a heating source, and supplies the hot water supply side hot water storage tank 1a. Is provided with drainage channels 25 for draining hot water from the hot water storage tanks 1a, 1b from the bottoms thereof and draining them through one drain valve 29, respectively. The drainage channel 25 is provided with a regulating means S for regulating the inflow of hot water from the bottom side of the hot water storage tanks 1a, 1b to the bottoms of the other hot water storage tanks 1b, 1a via the drainage channel 25. .

上記請求項1の給湯装置では、各貯湯タンク1a、1bの湯水をその底部から流出させて一つの排水弁29を介して排水する排水路25を設けたので、一つの排水弁29を操作することによって、各貯湯タンク1a、1bの水(温水)を排水することができる。また、排水路25には、各貯湯タンク1a、1bの底部側からの排水路25を介した他の貯湯タンク1b、1aの底部への湯の流入を規制する規制手段Sを設けているので、沸き上げ運転時や給湯運転時等において、給湯側貯湯タンク1aの底部に取水側貯湯タンク1bの下部の温水が流入したり、取水側貯湯タンク1bの底部に給湯側貯湯タンク1aの下部の温水が流入したりすることがない。   In the hot water supply apparatus according to the first aspect, since the drainage passage 25 for discharging the hot water from the hot water storage tanks 1a and 1b from the bottom and draining it through the one drainage valve 29 is provided, one drainage valve 29 is operated. By this, the water (hot water) of each hot water storage tank 1a, 1b can be drained. Moreover, since the drainage channel 25 is provided with a regulating means S that regulates the inflow of hot water into the bottom of the other hot water storage tanks 1b, 1a via the drainage channel 25 from the bottom side of each hot water storage tank 1a, 1b. During boiling operation or hot water supply operation, hot water in the lower part of the intake side hot water storage tank 1b flows into the bottom of the hot water supply side hot water storage tank 1a, or in the lower part of the intake side hot water storage tank 1b. Hot water does not flow in.

請求項2の給湯装置は、上記規制手段Sは、取水側貯湯タンク1bの底部から流出した温水の給湯側貯湯タンク1aの底部への流入を規制する第1逆止弁30と、給湯側貯湯タンク1aの底部から流出した温水の取水側貯湯タンク1bの底部への流入を規制する第2逆止弁31とを備えたことを特徴としている。   In the hot water supply apparatus according to claim 2, the restriction means S includes a first check valve 30 for restricting the flow of hot water flowing out from the bottom of the intake water storage tank 1b into the bottom of the hot water storage tank 1a, and the hot water storage hot water. A second check valve 31 is provided that regulates the inflow of hot water flowing out from the bottom of the tank 1a to the bottom of the intake side hot water storage tank 1b.

上記請求項2の給湯装置では、規制手段Sを第1逆止弁30と第2逆止弁31にて構成することができ、排水路25の簡略化を図ることができる。   In the hot water supply apparatus of the second aspect, the restricting means S can be constituted by the first check valve 30 and the second check valve 31, and the drainage channel 25 can be simplified.

請求項1の給湯装置によれば、一つの排水弁を操作することによって、各貯湯タンクの水(温水)を排水することができるので、排水作業の簡略化を図ることができ、排水処置の作業量低減による施工性の向上を図ることができる。また、排水弁としては一つで済み、イニシャルコストの低減にも寄与する。さらに、沸き上げ運転時等において、給湯側貯湯タンクの底部に取水側貯湯タンクの下部の温水が流入したり、取水側貯湯タンクの底部に給湯側貯湯タンクの下部の温水が流入したりすることがない。すなわち、取水側貯湯タンクの底部への低温水流入による給湯側貯湯タンクの温水温度低下を防止でき、給湯側貯湯タンクへの貯湯を効率よく行うことができる。また、取水側貯湯タンクの底部への給湯側貯湯タンクからの高温水の流入によるこの取水側貯湯タンクの底部の温水温度上昇を防止できる。特に、加熱源としてヒートポンプ式加熱源を使用した場合、ヒートポンプ式加熱源へ供給される温水の温度(入水温度)の上昇を防止できるので、沸き上げ運転時等の沸き上げ効率の低下を防止できて、無駄のない運転が可能であって、ランニングコストの低減を図ることができる。これに対して、ヒートポンプ式加熱源への入水温度が上昇すれば、冷凍サイクルにおいて、放熱過程でのエンタルピ差が狭くなり、沸き上げ運転効率が低下する。また、貯湯タンクを有するので、深夜の電気料金が安く設定されている近年において、深夜に沸き上げ運転を行って、貯湯タンクに湯を貯めるようにすることができる。これにより、昼間の沸き上げ運転を回避して、ランニングコストの低減を図ることができる。なお、貯湯タンクを複数個備えた多缶式の特有の効果(タンク径を小さくすることによる製品幅縮小の効果)、つまり貯湯タンクが1個の一缶式では設置できない狭小地への設置が可能となる等の効果を発揮することができる。   According to the hot water supply apparatus of claim 1, since the water (hot water) of each hot water storage tank can be drained by operating one drain valve, drainage work can be simplified, The workability can be improved by reducing the amount of work. In addition, only one drain valve is required, which contributes to a reduction in initial cost. Furthermore, during boiling operation, hot water in the lower part of the intake side hot water storage tank flows into the bottom of the hot water supply side hot water storage tank, and hot water in the lower part of the hot water supply side hot water storage tank flows into the bottom of the intake side hot water storage tank. There is no. That is, it is possible to prevent the hot water temperature of the hot water supply side hot water storage tank from being lowered due to low temperature water flowing into the bottom of the intake side hot water storage tank, and to efficiently store hot water in the hot water supply side hot water storage tank. Further, it is possible to prevent an increase in the hot water temperature at the bottom of the intake side hot water storage tank due to the inflow of high-temperature water from the hot water supply side hot water storage tank to the bottom of the intake side hot water storage tank. In particular, when a heat pump type heat source is used as the heat source, it is possible to prevent a rise in the temperature of the hot water supplied to the heat pump type heat source (incoming water temperature), thus preventing a decrease in the boiling efficiency during the boiling operation. Thus, it is possible to operate without waste and to reduce the running cost. On the other hand, if the incoming water temperature to the heat pump type heat source rises, the enthalpy difference in the heat release process becomes narrow in the refrigeration cycle, and the boiling operation efficiency decreases. In addition, since a hot water storage tank is provided, in recent years when electricity charges at midnight are set low, it is possible to perform boiling operation at midnight and store hot water in the hot water storage tank. As a result, daytime boiling operation can be avoided and the running cost can be reduced. The unique effect of the multi-can type with multiple hot water storage tanks (the effect of reducing the product width by reducing the tank diameter), that is, installation in narrow spaces where a single hot water storage tank cannot be installed. The effect of becoming possible can be exhibited.

請求項2の給湯装置によれば、排水路の簡略化を図ることができ、給湯装置全体のイニシャルコスト低減を達成でき、また、規制手段としての信頼性も向上する。   According to the hot water supply apparatus of the second aspect, the drainage channel can be simplified, the initial cost of the entire hot water supply apparatus can be reduced, and the reliability as the regulating means is improved.

次に、この発明の給湯装置の具体的な実施の形態について、図面を参照しつつ詳細に説明する。図1は給湯装置の要部簡略図である。この給湯装置は、給湯側(上位側)の貯湯タンク1aと、取水側(下位側)の貯湯タンク1bとを備え、給湯側貯湯タンク1aの湯を浴槽(図示省略)に供給(給湯)したり、台所やシャワーに供給(給湯)したりすることができる。   Next, specific embodiments of the hot water supply apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 is a simplified view of a main part of a hot water supply apparatus. The hot water supply device includes a hot water storage tank 1a on the hot water supply side (upper side) and a hot water storage tank 1b on the intake side (lower side), and supplies (hot water supply) hot water from the hot water supply side hot water storage tank 1a to a bathtub (not shown). Or supply (hot water) to the kitchen or shower.

この場合、給湯側貯湯タンク1aの底部と取水側貯湯タンク1bの頂部とを連絡配管2で接続している。そして、取水側貯湯タンク1bの底部には後述する加熱源に低温水を供給するために流出配管3が接続され、給湯側貯湯タンク1aの頂部には加熱源にて加熱された高温水を貯湯タンク1aに流入させる流入配管4が接続されている。この際、流出配管3に循環用ポンプ5が介設されている。なお、流入配管4は、加熱源側の本体部6と、三方弁7を介して分岐される分岐部8、9とを備え、一方の分岐部8が給湯側貯湯タンク1aの頂部に接続され、他方の分岐部9が取水側貯湯タンク1bの底部に接続されている。   In this case, the bottom of the hot water supply hot water storage tank 1a and the top of the intake water hot water storage tank 1b are connected by the connecting pipe 2. An outflow pipe 3 is connected to the bottom of the intake-side hot water storage tank 1b to supply low-temperature water to a heating source, which will be described later, and hot water heated by the heating source is stored at the top of the hot-water supply hot water storage tank 1a. An inflow pipe 4 for flowing into the tank 1a is connected. At this time, a circulation pump 5 is interposed in the outflow pipe 3. The inflow pipe 4 includes a main body 6 on the heating source side and branch portions 8 and 9 branched via a three-way valve 7, and one branch portion 8 is connected to the top of the hot water supply side hot water storage tank 1a. The other branch 9 is connected to the bottom of the intake water storage tank 1b.

この場合の加熱源としてはヒートポンプ式加熱源を使用した。すなわち、図2に示すように、ヒートポンプ式加熱源を構成する熱源ユニットHは、圧縮機35と水熱交換器36と膨張弁37と蒸発器38等を順に接続して構成される冷凍サイクル39を備える。そして、流出配管3と流入配管4との間に、上記水熱交換器36にて構成される熱交換路40が形成され、この熱交換路40を貯湯タンク1bからの低温水が流れ、この水熱交換器36にて加熱される。   In this case, a heat pump type heat source was used as the heat source. That is, as shown in FIG. 2, the heat source unit H constituting the heat pump heating source includes a refrigeration cycle 39 in which a compressor 35, a water heat exchanger 36, an expansion valve 37, an evaporator 38, and the like are connected in order. Is provided. And the heat exchange path 40 comprised by the said water heat exchanger 36 is formed between the outflow piping 3 and the inflow piping 4, and the low temperature water from the hot water storage tank 1b flows through this heat exchange path 40, and this Heated by the water heat exchanger 36.

また、給湯側貯湯タンク1aの頂部には、出湯路(出湯管)10が連結(接続)されている。出湯路10は、図示省略するが、例えば、ふろ混合弁に接続される分岐管と、給湯混合弁に接続され分岐管とを備える。ここで、ふろ混合弁とは、給湯側貯湯タンク1aからの湯と、水道水とを混合して、その混合した温水を上記浴槽に給湯するものである。また、給湯混合弁とは、給湯側貯湯タンク1aからの湯と、水道水とを混合して、台所の蛇口や洗面所のシャワー等に給湯するものである。   In addition, a hot water outlet (hot water pipe) 10 is connected (connected) to the top of the hot water supply side hot water storage tank 1a. Although not shown, the hot water outlet 10 includes, for example, a branch pipe connected to the bath mixing valve and a branch pipe connected to the hot water supply mixing valve. Here, the bath mixing valve mixes hot water from the hot water supply side hot water storage tank 1a and tap water, and supplies the mixed hot water to the bathtub. The hot water supply mixing valve mixes hot water from the hot water supply side hot water storage tank 1a with tap water and supplies the hot water to a kitchen faucet or a shower in a bathroom.

そして、貯湯タンク1a、1bには、循環用ポンプ12と、熱交換器13にて構成される熱交換路14とが介設されている循環路11が接続されている。すなわち、循環路11は、熱交換路14に貯湯タンク1aの頂部からの湯を供給する流出路15と、熱交換路14から流出した湯を貯湯タンク1bの下部側に戻す流入路16とを有する。また、流出路15に循環用ポンプ12が介設され、この循環用ポンプ12と熱交換路14との間に逆止弁17が介設されている。この逆止弁17は矢印A方向の温水の流れを許容して、矢印Aと反対方向の温水の流れを規制する。   The hot water storage tanks 1a and 1b are connected to a circulation path 11 in which a circulation pump 12 and a heat exchange path 14 composed of a heat exchanger 13 are interposed. That is, the circulation path 11 includes an outflow path 15 for supplying hot water from the top of the hot water storage tank 1a to the heat exchange path 14, and an inflow path 16 for returning the hot water flowing out of the heat exchange path 14 to the lower side of the hot water storage tank 1b. Have. A circulation pump 12 is interposed in the outflow path 15, and a check valve 17 is interposed between the circulation pump 12 and the heat exchange path 14. This check valve 17 allows the flow of hot water in the direction of arrow A and regulates the flow of hot water in the direction opposite to arrow A.

また、図示省略の浴槽には、追い焚き用循環路20が接続されている。すなわち、追い焚き用循環路20は、浴槽に設けられる接続用アダプタを介して接続される往路配管21と復路配管22とを備え、この往路配管21と復路配管22とは、上記熱交換器13にて構成される熱交換路23を介して接続されている。なお、往路配管21には図示省略の循環用ポンプが介設されている。   A recirculation circuit 20 is connected to a bathtub (not shown). In other words, the recirculation circuit 20 includes an outward piping 21 and a return piping 22 connected via a connection adapter provided in the bathtub. The outward piping 21 and the return piping 22 are connected to the heat exchanger 13. It is connected through a heat exchange path 23 constituted by In addition, a circulation pump (not shown) is interposed in the forward piping 21.

さらに、各貯湯タンク1a、1bには、各タンク内の温水を外部排水するための排水路25が接続されている。この排水路25は、給湯側貯湯タンク1aの底部に接続される第1部26と、この第1部26と上記流出配管3とを接続する第2部27とを備え、第1部26と第2部27との合流部28よりも下流側に一つの排水栓(排水弁)29が配置されている。そして、この排水路25には、各貯湯タンク1a、1bの底部側からのこの排水路25を介した他の貯湯タンク1b、1aの底部への湯の流入を規制する規制手段Sを設けている。   Furthermore, a drainage channel 25 is connected to each hot water storage tank 1a, 1b for draining hot water in each tank to the outside. The drainage channel 25 includes a first part 26 connected to the bottom of the hot-water supply-side hot water storage tank 1a, and a second part 27 that connects the first part 26 and the outflow pipe 3. One drain plug (drain valve) 29 is disposed downstream of the junction 28 with the second portion 27. The drainage channel 25 is provided with regulating means S for regulating the inflow of hot water from the bottom side of each hot water storage tank 1a, 1b to the bottom of the other hot water storage tanks 1b, 1a via the drainage channel 25. Yes.

規制手段Sは、取水側貯湯タンク1bの底部から流出した温水の給湯側貯湯タンク1aの底部への流入を規制する第1逆止弁30と、給湯側貯湯タンク1aの底部から流出した温水の取水側貯湯タンク1bの底部への流入を規制する第2逆止弁31とを備える。この際、第1逆止弁30は、排水弁29が開状態であれば、給湯側貯湯タンク1aの底部からの排水を許容し、第2逆止弁31は、排水弁29が開状態であれば、取水側貯湯タンク1bの底部からの排水を許容する。なお、貯湯タンク1bの底部には水道水供給路32が接続されている。   The regulating means S includes a first check valve 30 that regulates the flow of hot water flowing out from the bottom of the water intake side hot water storage tank 1b to the bottom of the hot water supply side hot water storage tank 1a, and hot water flowing out from the bottom of the hot water supply side hot water storage tank 1a. And a second check valve 31 for restricting inflow to the bottom of the intake water storage tank 1b. At this time, if the drain valve 29 is in the open state, the first check valve 30 allows drainage from the bottom of the hot water supply hot water storage tank 1a, and the second check valve 31 has the drain valve 29 in the open state. If there is, drainage from the bottom of the intake side hot water storage tank 1b is allowed. A tap water supply path 32 is connected to the bottom of the hot water storage tank 1b.

上記のように構成された給湯装置では、循環用ポンプ5を駆動すると、取水側貯湯タンク1bの底部側の低温水が流出配管3に流出して矢印Bのように加熱源に供給され、この加熱源にて加熱されて高温となった温水が流入配管4を介して、矢印Bのように給湯側貯湯タンク1aの頂部に流入する。この際、給湯側貯湯タンク1aの底部側の温水が連絡配管2を介して取水側貯湯タンク1bの頂部側に流入する。このように、取水側貯湯タンク1bの底部側の温水が加熱源にて加熱されて給湯側貯湯タンク1aの頂部に流入する沸き上げ運転を行うことができ、各貯湯タンク1a、1bに高温の湯を貯めることができる。   In the hot water supply apparatus configured as described above, when the circulation pump 5 is driven, low temperature water on the bottom side of the intake side hot water storage tank 1b flows out into the outflow pipe 3 and is supplied to the heating source as indicated by an arrow B. Hot water heated to a high temperature by the heating source flows into the top of the hot water supply side hot water storage tank 1a as shown by an arrow B through the inflow pipe 4. At this time, warm water on the bottom side of the hot water supply hot water storage tank 1a flows into the top side of the intake water hot water storage tank 1b via the connecting pipe 2. In this way, it is possible to perform a boiling operation in which the hot water on the bottom side of the intake side hot water storage tank 1b is heated by the heating source and flows into the top of the hot water supply side hot water storage tank 1a. You can store hot water.

また、循環用ポンプ12を駆動すると、図1の矢印Aのように、給湯側貯湯タンク1aの頂部の高温水が流出路15から熱交換路14に流れ、この熱交換路14から流入路16を介して取水側貯湯タンク1bに返流する。すなわち、循環路11内を貯湯タンク1a、1bの湯が循環する。また、追い焚き用循環路20の循環用ポンプを駆動すると、浴槽の湯が、矢印Cのように往路配管21から熱交換路13に流れ、この熱交換路23から復路配管22を介して浴槽に返流する。すなわち、追い焚き用循環路20内を浴槽の湯が循環する。そして、循環路11の熱交換路14を流れる給湯側貯湯タンク1aからの湯と、追い焚き用循環路20の熱交換路23を流れる浴槽からの湯とが熱交換を行って、この浴槽からの湯が加熱されて浴槽に戻る。このため、浴槽の湯の追い焚き運転を行うことができる。   When the circulation pump 12 is driven, the hot water at the top of the hot water supply side hot water storage tank 1a flows from the outflow path 15 to the heat exchange path 14 as shown by the arrow A in FIG. To the intake side hot water storage tank 1b. That is, the hot water in the hot water storage tanks 1 a and 1 b circulates in the circulation path 11. Further, when the circulation pump of the recirculation circulation path 20 is driven, the hot water in the bathtub flows from the forward piping 21 to the heat exchange path 13 as indicated by an arrow C, and the bathtub is passed from the heat exchange path 23 through the return piping 22. To return. That is, the hot water of the bathtub circulates in the recirculation circuit 20. Then, the hot water from the hot water supply hot water storage tank 1a flowing through the heat exchange path 14 of the circulation path 11 and the hot water from the bathtub flowing through the heat exchange path 23 of the reheating circulation path 20 exchange heat, and from this bathtub The hot water is heated and returns to the bathtub. For this reason, the reheating operation of the hot water of a bathtub can be performed.

ところで、沸き上げ運転や追い焚き運転時等における排水弁29の閉状態では、取水側貯湯タンク1bの底部から排水路25に温水が流入したとしても、第1逆止弁30にて給湯側貯湯タンク1aの底部に流入させない。また、給湯側貯湯タンク1aの底部から温水が排水路25に温水が流入したとしても、第2逆止弁31にて取水側貯湯タンク1bの底部に流入させない。そして、循環路11の流出路15には逆止弁17が設けられており、取水側貯湯タンク1b側からの循環路11経由での給湯側貯湯タンク1aへの温水の逆流を規制している。   By the way, in the closed state of the drain valve 29 at the time of boiling operation or reheating operation, even if hot water flows into the drainage channel 25 from the bottom of the intake side hot water storage tank 1b, the hot water supply side hot water storage is performed by the first check valve 30. It does not flow into the bottom of the tank 1a. Further, even if hot water flows into the drainage channel 25 from the bottom of the hot water supply hot water storage tank 1a, the second check valve 31 does not allow the hot water to flow into the bottom of the water intake hot water storage tank 1b. And the check valve 17 is provided in the outflow path 15 of the circulation path 11, and the backflow of the warm water to the hot water supply side hot water storage tank 1a via the circulation path 11 from the intake side hot water storage tank 1b side is controlled. .

上記給湯装置によれば、各貯湯タンク1a、1bの湯水をその底部から流出させて一つの排水弁29を介して排水する排水路25を設けたので、一つの排水弁29を操作することによって、各貯湯タンク1a、1bの水(温水)を排水することができる。これにより、排水作業の簡略化を図ることができ、排水処置の作業量低減による施工性の向上を図ることができる。また、排水弁29としては一つで済み、イニシャルコストの低減にも寄与する。   According to the hot water supply apparatus, since the drainage passage 25 is provided for draining the hot water of each hot water storage tank 1a, 1b from the bottom thereof and draining it through one drainage valve 29, by operating one drainage valve 29, The water (hot water) of each hot water storage tank 1a, 1b can be drained. Thereby, simplification of drainage work can be achieved and workability can be improved by reducing the amount of drainage work. Further, only one drain valve 29 is required, which contributes to a reduction in initial cost.

さらに、排水路25には、各貯湯タンク1a、1bの底部側からの排水路25を介した他の貯湯タンク1b、1aの底部への湯の流入を規制する規制手段Sを設けているので、沸き上げ運転時や給湯運転時等において、給湯側貯湯タンク1aの底部に取水側貯湯タンク1bの下部の温水が流入したり、取水側貯湯タンク1bの底部に給湯側貯湯タンク1aの下部の温水が流入したりすることがない。すなわち、取水側貯湯タンク1bの底部からの低温水流入による給湯側貯湯タンク1aの温水温度低下を防止でき、給湯側貯湯タンク1aへの貯湯を効率よく行うことができる。また、取水側貯湯タンク1bの底部への給湯側貯湯タンク1aからの高温水の流入によるこの取水側貯湯タンク1bの底部の温水温度の上昇を防止できる。特に、加熱源としてヒートポンプ式加熱源を使用した場合、ヒートポンプ式加熱源へ供給される温水の温度(入水温度)の上昇を防止できるので、沸き上げ運転時等の沸き上げ効率の低下を防止できて、無駄のない運転が可能であって、ランニングコストの低減を図ることができる。これに対して、ヒートポンプ式加熱源への入水温度が上昇すれば、冷凍サイクルにおいて、放熱過程でのエンタルピ差が狭くなり、沸き上げ運転効率が低下する。また、貯湯タンク1a、1bを有するので、深夜の電気料金が安く設定されている近年において、深夜に沸き上げ運転を行って、貯湯タンク1a、1bに湯を貯めるようにすることができる。これにより、昼間の沸き上げ運転を回避して、ランニングコストの低減を図ることができる。なお、貯湯タンクを複数個備えた多缶式の特有の効果(タンク径を小さくすることによる製品幅縮小の効果)、つまり貯湯タンクが1個の一缶式では設置できない狭小地への設置が可能となる等の効果を発揮することができる。   Further, the drainage channel 25 is provided with a regulating means S that regulates the inflow of hot water into the bottom of the other hot water storage tanks 1b, 1a from the bottom side of the hot water storage tanks 1a, 1b via the drainage channel 25. During boiling operation or hot water supply operation, hot water in the lower part of the intake side hot water storage tank 1b flows into the bottom of the hot water supply side hot water storage tank 1a, or in the lower part of the intake side hot water storage tank 1b. Hot water does not flow in. That is, it is possible to prevent the hot water temperature of the hot water supply side hot water storage tank 1a from being lowered due to the inflow of low temperature water from the bottom of the intake side hot water storage tank 1b, and hot water can be efficiently stored in the hot water supply side hot water storage tank 1a. Further, it is possible to prevent the hot water temperature at the bottom of the water intake side hot water storage tank 1b from rising due to the inflow of hot water from the hot water supply side hot water storage tank 1a to the bottom of the water intake side hot water storage tank 1b. In particular, when a heat pump type heat source is used as the heat source, it is possible to prevent a rise in the temperature of the hot water supplied to the heat pump type heat source (incoming water temperature), thus preventing a decrease in the boiling efficiency during the boiling operation. Thus, it is possible to operate without waste and to reduce the running cost. On the other hand, if the incoming water temperature to the heat pump type heat source rises, the enthalpy difference in the heat release process becomes narrow in the refrigeration cycle, and the boiling operation efficiency decreases. In addition, since the hot water storage tanks 1a and 1b are provided, in recent years when electricity charges at midnight are set at a low price, the hot water can be stored in the hot water storage tanks 1a and 1b by performing a boiling operation at midnight. As a result, daytime boiling operation can be avoided and the running cost can be reduced. The unique effect of the multi-can type with multiple hot water storage tanks (the effect of reducing the product width by reducing the tank diameter), that is, installation in narrow spaces where a single hot water storage tank cannot be installed. The effect of becoming possible can be exhibited.

また、規制手段Sを第1逆止弁30と第2逆止弁31にて構成することができ、排水路25の簡略化を図ることができる。これにより、給湯装置全体のイニシャルコスト低減を達成できると共に、規制手段Sとしての信頼性も向上する。   Further, the regulating means S can be constituted by the first check valve 30 and the second check valve 31, and the drainage channel 25 can be simplified. Thereby, the initial cost reduction of the whole hot water supply apparatus can be achieved, and the reliability as the regulating means S is improved.

さらに、上記実施の形態では、循環路11の流出路15には逆止弁17が設けられており、取水側貯湯タンク1b側からの循環路11経由での給湯側貯湯タンク1aへの温水の逆流を規制している。このため、取水側貯湯タンク1bの底部側の低温水がこの循環路11を介して給湯側貯湯タンク1aの頂部に流入するのを防止できて、給湯側貯湯タンク1aの頂部側の温水の温度低下を防止できる。すなわち、給湯側貯湯タンク1aの頂部から出湯する場合に、安定して高温の湯を出湯することができ、ユーザは満足行く湯の使用が可能となる。   Furthermore, in the said embodiment, the check valve 17 is provided in the outflow path 15 of the circulation path 11, and the hot water to the hot water supply side hot water storage tank 1a via the circulation path 11 from the intake side hot water storage tank 1b side is provided. Regulates backflow. For this reason, it is possible to prevent the low-temperature water on the bottom side of the intake-side hot water storage tank 1b from flowing into the top of the hot-water supply-side hot water storage tank 1a through the circulation path 11, and the temperature of the hot water on the top side of the hot-water supply-side hot water storage tank 1a Decrease can be prevented. That is, when hot water is discharged from the top of the hot water supply side hot water storage tank 1a, hot water can be stably discharged, and the user can use the hot water satisfactorily.

以上にこの発明の具体的な実施の形態について説明したが、この発明は上記形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。例えば、貯湯タンクの数としては2個限るものではなく、給湯側貯湯タンク1aと取水側貯湯タンク1bとの間に、1個又は複数の中間貯湯タンクを配置したものであってもよい。この際、各中間貯湯タンクには、頂部から温水が流入して底部から温水が流出すように連絡配管で連結する。また、加熱源として、上記実施の形態では、ヒートポンプ式のものを使用したが、ヒータや火力等を使用した他の熱源ユニットを使用してもよい。また、ヒートポンプ式を使用する場合においても、冷凍サイクルの冷媒として、ジクロロジフルオロメタン(R−12)やクロロジフルオロメタン(R−22)や1,1,1,2−テトラフルオロエタン(R−134a)等のような冷媒であっても、炭酸ガス、エチレン、エタン、酸化窒素等の自然系冷媒であってもよい。   Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the number of hot water storage tanks is not limited to two, and one or a plurality of intermediate hot water storage tanks may be disposed between the hot water supply hot water storage tank 1a and the intake water hot water storage tank 1b. At this time, each intermediate hot water storage tank is connected by a connecting pipe so that warm water flows from the top and warm water flows from the bottom. Moreover, although the heat pump type thing was used as a heating source in the said embodiment, you may use the other heat source unit which uses a heater, a thermal power, etc. Even when the heat pump type is used, dichlorodifluoromethane (R-12), chlorodifluoromethane (R-22), 1,1,1,2-tetrafluoroethane (R-134a) is used as a refrigerant for the refrigeration cycle. Or a natural refrigerant such as carbon dioxide, ethylene, ethane, or nitric oxide.

この発明の給湯装置の実施形態を示す簡略図である。It is a simplified diagram showing an embodiment of a hot water supply apparatus of the present invention. 上記給湯装置の加熱ユニットを示す簡略図である。It is a schematic diagram which shows the heating unit of the said hot water supply apparatus. 従来の給湯装置の簡略図である。It is a simplified diagram of a conventional hot water supply apparatus.

符号の説明Explanation of symbols

1a、1b・・貯湯タンク、25・・排水路、29・・排水弁、30・・第1逆止弁、31・・第2逆止弁、S・・規制手段   1a, 1b ... Hot water storage tank, 25 ... Drainage channel, 29 ... Drain valve, 30 ... First check valve, 31 ... Second check valve, S ... Regulatory means

Claims (2)

複数の貯湯タンク(1a)(1b)を備え、取水側の貯湯タンク(1b)の底部から低温水を流出させて、この低温水を加熱源にて沸き上げて給湯側の貯湯タンク(1a)の頂部に流入させる沸き上げ運転が可能な給湯装置であって、各貯湯タンク(1a)(1b)の湯水をその底部から流出させて一つの排水弁(29)を介して排水する排水路(25)を設けると共に、各貯湯タンク(1a)(1b)の底部側からの上記排水路(25)を介した他の貯湯タンク(1b)(1a)の底部への湯の流入を規制する規制手段(S)をこの排水路(25)に設けたことを特徴とする給湯装置。   A plurality of hot water storage tanks (1a) and (1b) are provided, low temperature water is allowed to flow out from the bottom of the hot water storage tank (1b) on the intake side, and the low temperature water is boiled up by a heating source, thereby A hot water supply device capable of boiling operation that flows into the top of the water storage drainage channel that drains hot water from each hot water storage tank (1a) (1b) from the bottom and drains it through one drain valve (29) ( 25) and a regulation that regulates the inflow of hot water from the bottom of each hot water storage tank (1a) (1b) to the bottom of another hot water storage tank (1b) (1a) through the drainage channel (25) A hot water supply apparatus characterized in that means (S) is provided in the drainage channel (25). 上記規制手段(S)は、取水側の貯湯タンク(1b)の底部から流出した温水の給湯側の貯湯タンク(1a)の底部への流入を規制する第1逆止弁(30)と、給湯側の貯湯タンク(1a)の底部から流出した温水の取水側の貯湯タンク(1b)の底部への流入を規制する第2逆止弁(31)とを備えたことを特徴とする請求項1の給湯装置。
The regulating means (S) includes a first check valve (30) for regulating the inflow of hot water flowing out from the bottom of the hot water storage tank (1b) on the intake side into the bottom of the hot water storage tank (1a) on the hot water supply side, 2. A second check valve (31) that regulates inflow of hot water flowing out from the bottom of the hot water storage tank (1 a) to the bottom of the hot water storage tank (1 b) on the intake side. Water heater.
JP2003404620A 2003-12-03 2003-12-03 Hot water supply device Pending JP2005164153A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101392949A (en) * 2008-10-18 2009-03-25 侴乔力 Boiling water machine/water heater
JP2011252658A (en) * 2010-06-02 2011-12-15 Mitsubishi Electric Corp Hot water storage type water heater
JP2015105761A (en) * 2013-11-28 2015-06-08 株式会社Lixil Hot water storage type water heater
JP2017083059A (en) * 2015-10-27 2017-05-18 パナソニックIpマネジメント株式会社 Water heater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101392949A (en) * 2008-10-18 2009-03-25 侴乔力 Boiling water machine/water heater
JP2011252658A (en) * 2010-06-02 2011-12-15 Mitsubishi Electric Corp Hot water storage type water heater
JP2015105761A (en) * 2013-11-28 2015-06-08 株式会社Lixil Hot water storage type water heater
JP2017083059A (en) * 2015-10-27 2017-05-18 パナソニックIpマネジメント株式会社 Water heater

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