JP2012007849A - Hot water storage tank unit - Google Patents

Hot water storage tank unit Download PDF

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JP2012007849A
JP2012007849A JP2010145791A JP2010145791A JP2012007849A JP 2012007849 A JP2012007849 A JP 2012007849A JP 2010145791 A JP2010145791 A JP 2010145791A JP 2010145791 A JP2010145791 A JP 2010145791A JP 2012007849 A JP2012007849 A JP 2012007849A
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hot water
storage tank
water storage
heat exchanger
heat
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JP5399327B2 (en
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Naoto Nomura
直人 野邑
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Rinnai Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage tank unit including a hot water tank 2, an outer casing 3 for storing the hot water tank, and a tubular heat exchanger 7 stored in the outer casing, while allowing a heat exchanger to be easily attached to or detached from the front face of the outer casing.SOLUTION: The heat exchanger 7 includes a plurality of upper and lower lateral tube parts 71 extending in the lateral direction in front of the hot water tank 2; and U-turn parts 72 having one side and the other side of the lateral direction which connect the lateral tube part to the lateral tube part adjacent on the upper side and the lateral tube part adjacent on the lower side, respectively.Each of the U-turn parts 72 is bent rearward with respect to the lateral tube part 71 so as to be positioned at the lateral side of the hot water tank 2. Further, a convex part for receiving the U-turn part 72 is formed on the outer face of a heat-insulating cover 2a for covering the hot water tank 2 so as to cover the U-turn part 72 with a lid body 2c from the outside.

Description

本発明は、貯湯タンクと、貯湯タンクを収納する直方体形状の外装ケーシングとを備える貯湯タンクユニットであって、外装ケーシング内に、貯湯タンク内のタンク水を流す管と他の流体を流す管とを有し、タンク水と他の流体との間で熱交換させる管状の熱交換器を収納したものに関する。   The present invention is a hot water storage tank unit including a hot water storage tank and a rectangular parallelepiped outer casing for storing the hot water storage tank, and a pipe for flowing tank water in the hot water storage tank and a pipe for flowing other fluid in the outer casing. And having a tubular heat exchanger that exchanges heat between tank water and other fluids.

従来、この種の貯湯タンクユニットとして、特許文献１により、タンク水とヒートポンプユニットで加熱された冷媒との間で熱交換させてタンク水を加熱する管状の熱交換器を貯湯タンクの周りに螺旋状に巻回させて配置したものが知られている。   Conventionally, as a hot water storage tank unit of this type, according to Patent Document 1, a tubular heat exchanger that heats tank water by exchanging heat between the tank water and the refrigerant heated by the heat pump unit is spiraled around the hot water storage tank. What is wound and arranged in a shape is known.

然し、上記の如く貯湯タンクの周りに螺旋巻きの熱交換器を設置すると、貯湯タンクユニットのコンパクト化を図ることができるものの、熱交換器の交換や修理等のメンテナンスを行う際、外装ケーシングを一旦解体し、熱交換器を貯湯タンクの上方に持ち上げて取り外すことが必要になり、作業が非常に面倒になる。   However, if a spiral heat exchanger is installed around the hot water storage tank as described above, the hot water tank unit can be made compact. It is necessary to dismantle and lift the heat exchanger above the hot water tank and remove it, which makes the work very troublesome.

また、寒冷地では、貯湯タンクユニットを屋内に設置することが多い。そして、設置場所の天井に熱交換器が当たって、貯湯タンクの上方まで熱交換器を持ち上げられず、熱交換器が取り外し不能になることもある。   In cold regions, hot water storage tank units are often installed indoors. In some cases, the heat exchanger hits the ceiling of the installation location, the heat exchanger cannot be lifted up above the hot water storage tank, and the heat exchanger cannot be removed.

特開２００５−３１５４８０号公報JP 2005-315480 A

本発明は、以上の点に鑑み、外装ケーシングの前面から熱交換器を容易に脱着することができるようにしたメンテナンス性に優れた貯湯タンクユニットを提供することをその課題としている。   This invention makes it the subject to provide the hot water storage tank unit excellent in the maintainability which enabled it to remove | desorb a heat exchanger easily from the front surface of an exterior casing in view of the above point.

上記課題を解決するために、本発明は、貯湯タンクと、貯湯タンクを収納する直方体形状の外装ケーシングとを備える貯湯タンクユニットであって、外装ケーシング内に、貯湯タンク内のタンク水を流す管と他の流体を流す管とを有し、タンク水と他の流体との間で熱交換させる管状の熱交換器を収納するものにおいて、熱交換器は、貯湯タンクの前方位置で横方向にのびる上下複数の横管部と、各横管部を上方に隣接する横管部と下方に隣接する横管部とに夫々接続する横方向一方と他方のＵターン部とを有し、各Ｕターン部は、貯湯タンクの横側方に位置するように横管部に対し後方に屈曲していることを特徴とする。   In order to solve the above-described problems, the present invention provides a hot water storage tank unit including a hot water storage tank and a rectangular parallelepiped outer casing that stores the hot water storage tank, and a pipe for flowing the tank water in the hot water storage tank into the outer casing. And a pipe through which other fluid flows, and housing a tubular heat exchanger that exchanges heat between the tank water and the other fluid, the heat exchanger is laterally positioned at the front position of the hot water storage tank. A plurality of upper and lower horizontal pipe sections, one horizontal pipe section connecting each horizontal pipe section to the upper horizontal pipe section and the lower horizontal pipe section, and the other U-turn section; The turn part is characterized by bending backward with respect to the horizontal pipe part so as to be located on the lateral side of the hot water storage tank.

本発明によれば、熱交換器が貯湯タンクの前方に位置する横管部と、貯湯タンクの横側方に位置するＵターン部とで構成されるため、外装ケーシングの前面から熱交換器を容易に脱着できるようになり、メンテナンス性が向上する。また、Ｕターン部を横管部に対し後方に屈曲させることにより、外装ケーシングの奥行きを有効に活用して、熱交換器の全長を長くすることができ、熱交換器での熱交換効率も確保できる。   According to the present invention, since the heat exchanger is composed of the horizontal pipe portion positioned in front of the hot water storage tank and the U-turn portion positioned on the lateral side of the hot water storage tank, the heat exchanger is installed from the front surface of the outer casing. Easy to attach and detach, improving maintainability. In addition, by bending the U-turn part backward with respect to the horizontal pipe part, it is possible to effectively utilize the depth of the outer casing and lengthen the overall length of the heat exchanger, and the heat exchange efficiency in the heat exchanger is also improved. It can be secured.

また、一般的に、貯湯タンクを被覆する断熱材料製のカバーを設けるが、この場合、カバーの外面に、少なくともＵターン部を受け入れる凹部を形成することが望ましい。これによれば、横方向一方のＵターン部と横方向他方のＵターン部との間の横幅を凹部の分だけ短縮でき、その分外装ケーシングの横幅も短縮することができ、貯湯タンクユニットのコンパクト化を図ることができる。   In general, a cover made of a heat insulating material for covering the hot water storage tank is provided. In this case, it is desirable to form a recess for receiving at least the U-turn portion on the outer surface of the cover. According to this, the lateral width between one U-turn part in the lateral direction and the other U-turn part in the lateral direction can be reduced by the amount of the recess, and the lateral width of the outer casing can be reduced accordingly, Compactness can be achieved.

また、凹部に挿入したＵターン部を外方から覆う断熱材料製の蓋体をカバーに着脱自在に取付けることが望ましい。ここで、横管部は断熱チューブで被覆できるが、ある程度の厚さを持つ断熱チューブは屈曲させ難く、Ｕターン部をこのような断熱チューブで被覆することは困難である。上記の如く蓋体を取り付ければ、Ｕターン部での放熱を断熱チューブで被覆せずに防止でき、有利である。   Further, it is desirable that a cover made of a heat insulating material that covers the U-turn portion inserted into the recess from the outside is detachably attached to the cover. Here, the horizontal tube portion can be covered with a heat insulating tube, but a heat insulating tube having a certain thickness is difficult to bend and it is difficult to cover the U-turn portion with such a heat insulating tube. If the lid is attached as described above, it is possible to prevent heat dissipation at the U-turn portion without being covered with a heat insulating tube, which is advantageous.

本発明の実施形態の貯湯タンクユニットを具備するハイブリッド型貯湯式給湯暖房装置の構成を示す説明図。BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows the structure of the hybrid type hot water storage type hot-water supply heater provided with the hot water storage tank unit of embodiment of this invention. 実施形態の貯湯タンクユニットの斜視図。The perspective view of the hot water storage tank unit of embodiment. 実施形態の貯湯タンクユニットに設ける熱交換器の斜視図。The perspective view of the heat exchanger provided in the hot water storage tank unit of embodiment. 図２のＩＶ−ＩＶ線で切断した断面図。Sectional drawing cut | disconnected by the IV-IV line of FIG.

図１は、本発明の実施形態の貯湯タンクユニット１を具備するハイブリッド型貯湯式給湯暖房装置を示している。貯湯タンクユニット１は、貯湯タンク２と、貯湯タンク２を収納する外装ケーシング３とから成る。また、給湯暖房装置は、タンク水（貯湯タンク２内の水）を加熱する加熱装置４と、補助熱源機５とを備えている。補助熱源機５は、給湯用熱源部５１と暖房用熱源部５２とを有する複合熱源機で構成されており、給湯用熱源部５１により、貯湯タンク２から出湯される温水を補助的に加熱し、暖房用熱源部５２により、暖房回路６に循環させる熱媒体（水や不凍液等）を補助的に加熱するようにしている。   FIG. 1 shows a hybrid hot-water storage type hot-water supply / heating device including a hot-water storage tank unit 1 according to an embodiment of the present invention. The hot water storage tank unit 1 includes a hot water storage tank 2 and an outer casing 3 that houses the hot water storage tank 2. The hot water supply and heating device includes a heating device 4 that heats tank water (water in the hot water storage tank 2) and an auxiliary heat source unit 5. The auxiliary heat source unit 5 is composed of a composite heat source unit having a hot water supply heat source unit 51 and a heating heat source unit 52. The hot water source heat source unit 51 supplementarily heats hot water discharged from the hot water storage tank 2. The heating heat source section 52 supplementarily heats the heat medium (water, antifreeze liquid, etc.) circulated in the heating circuit 6.

加熱装置４は、冷媒を蒸発器４１からコンプレッサ４２と放熱器４３と膨張弁４４とを介して蒸発器４１に戻すヒートポンプユニットで構成される。蒸発器４１にはファン４１ａが付設されており、冷媒がファン４１ａにより送風される大気の熱を吸熱して蒸発する。蒸発した冷媒はコンプレッサ４２で圧縮されて高温高圧になり、放熱器４３で放熱した後、膨張弁４４で減圧されて蒸発器４１に戻される。また、貯湯タンク２の底部から頂部に加熱装置４の放熱器４３を介してタンク水を循環させるタンク水加熱回路４５を設けている。タンク水加熱回路４５には、加熱装置４側に位置させて、循環ポンプ４５ａが介設されている。そして、循環ポンプ４５ａの作動により、貯湯タンク２の底部から低温のタンク水が放熱器４３に供給され、放熱器４３における冷媒との熱交換でタンク水が加熱されて貯湯タンク２の頂部に戻されるようにしている。   The heating device 4 includes a heat pump unit that returns the refrigerant from the evaporator 41 to the evaporator 41 through the compressor 42, the radiator 43, and the expansion valve 44. The evaporator 41 is provided with a fan 41a, and the refrigerant absorbs heat from the atmosphere blown by the fan 41a and evaporates. The evaporated refrigerant is compressed by the compressor 42 to become high temperature and high pressure, radiated by the radiator 43, depressurized by the expansion valve 44, and returned to the evaporator 41. Further, a tank water heating circuit 45 that circulates tank water via a radiator 43 of the heating device 4 is provided from the bottom to the top of the hot water storage tank 2. In the tank water heating circuit 45, a circulation pump 45 a is provided so as to be positioned on the heating device 4 side. Then, by the operation of the circulation pump 45 a, low-temperature tank water is supplied from the bottom of the hot water storage tank 2 to the radiator 43, and the tank water is heated by heat exchange with the refrigerant in the radiator 43 and returned to the top of the hot water storage tank 2. It is trying to be.

貯湯タンク２は、上下方向に長手の容量が例えば５０Ｌのタンクである。貯湯タンク２の底部には給水路２１が接続され、頂部には出湯路２２が接続されている。給水路２１には、給水用外部配管２１ａからの冷水が減圧弁２１ｂを介して供給される。また、減圧弁２１ｂの下流側の給水路２１の部分から分岐する分岐給水路２１ｃが設けられており、この分岐給水路２１ｃと出湯路２２とを、給湯栓等の給湯端末（図示せず）に連なる給湯路２３の上流端に合流して接続している。そして、貯湯タンク２から出湯路２２を介して出湯される温水と、分岐給水路２１ｃを介して供給される冷水との混合比を湯水混合手段２４により調節し、設定温度の湯が給湯端末に供給されるようにしている。   The hot water storage tank 2 is a tank having a longitudinal capacity of, for example, 50 L in the vertical direction. A water supply path 21 is connected to the bottom of the hot water storage tank 2, and a hot water supply path 22 is connected to the top. Cold water from the external water supply pipe 21a is supplied to the water supply path 21 via the pressure reducing valve 21b. Further, a branch water supply path 21c branched from a portion of the water supply path 21 on the downstream side of the pressure reducing valve 21b is provided, and the branch water supply path 21c and the hot water supply path 22 are connected to a hot water supply terminal (not shown) such as a hot water tap. Are joined to and connected to the upstream end of the hot water supply passage 23 connected to. Then, the mixing ratio between the hot water discharged from the hot water storage tank 2 through the hot water supply passage 22 and the cold water supplied through the branch water supply passage 21c is adjusted by the hot water mixing means 24 so that the hot water at the set temperature is supplied to the hot water supply terminal. To be supplied.

湯水混合手段２４は、分岐給水路２１ｃの分岐部よりも下流側の給水路２１の部分に介設した第１流量調節弁２４ａと、分岐給水路２１ｃに介設した第２流量調節弁２４ｂとで構成されている。ここで、貯湯タンク２から出湯路２２への出湯量は、給水路２１から貯湯タンク２への給水量に等しい。そのため、貯湯タンク２から出湯路２２を介して出湯される温水の流量を第１流用調節弁２４ａにより調節できる。従って、第１と第２の両流量調節弁２４ａ，２４ｂにより温水と冷水の混合比を自動調節して、設定温度の湯を給湯端末に供給することができる。   The hot water mixing means 24 includes a first flow rate adjusting valve 24a interposed in a portion of the water supply channel 21 downstream from the branch portion of the branch water supply channel 21c, and a second flow rate adjusting valve 24b interposed in the branch water supply channel 21c. It consists of Here, the amount of hot water discharged from the hot water storage tank 2 to the hot water supply passage 22 is equal to the amount of water supplied from the water supply passage 21 to the hot water storage tank 2. Therefore, the flow rate of the hot water discharged from the hot water storage tank 2 through the hot water discharge path 22 can be adjusted by the first flow control valve 24a. Therefore, the mixing ratio of hot water and cold water can be automatically adjusted by both the first and second flow rate control valves 24a and 24b, and hot water at a set temperature can be supplied to the hot water supply terminal.

また、給湯路２３には、バイパス弁２３ａが介設されると共に、このバイパス弁２３ａと並列に、補助熱源機５の給湯用熱源部５１が接続されている。そして、出湯路２２に出湯される温水の温度が設定温度未満になったときは、バイパス弁２３ａを閉弁して、給湯用熱源部５１を作動させ、この熱源部５１により水を設定温度に加熱するようにしている。更に、分岐給水路２１ｃと給湯路２３とを第２流量調節弁２４ｂと並列に接続するバイパス路２３ｂを設け、このバイパス路２３ｂに、貯湯タンク２から出湯される湯温が高すぎるときに開く熱湯防止弁２３ｃを介設している。   Further, a bypass valve 23a is interposed in the hot water supply passage 23, and a hot water supply heat source section 51 of the auxiliary heat source machine 5 is connected in parallel with the bypass valve 23a. And when the temperature of the hot water discharged to the hot water supply path 22 becomes less than the set temperature, the bypass valve 23a is closed to operate the hot water supply heat source unit 51, and the heat source unit 51 sets the water to the set temperature. I try to heat it. Furthermore, a bypass passage 23b is provided to connect the branch water supply passage 21c and the hot water supply passage 23 in parallel with the second flow rate adjusting valve 24b. The bypass passage 23b is opened when the temperature of hot water discharged from the hot water storage tank 2 is too high. A hot water prevention valve 23c is interposed.

また、貯湯タンク２内に気泡が貯まって圧力が過度に上昇することを防止するために、貯湯タンク２の頂部には、圧力が所定値以上になったときに開弁する圧力逃がし弁２５が接続されている。   In addition, in order to prevent bubbles from accumulating in the hot water storage tank 2 and excessively increasing the pressure, a pressure relief valve 25 that opens when the pressure exceeds a predetermined value is provided at the top of the hot water storage tank 2. It is connected.

暖房回路６は、暖房熱源部５２で加熱された熱媒体を暖房端末（図示せず）に送る暖房往き管路６１と、暖房端末を通過した熱媒体を戻す暖房戻り管路６２とで構成されている。そして、暖房戻り管路６２に熱交換器７を介設すると共に、貯湯タンク２の上部の高温のタンク水を熱交換器７と循環ポンプ８１とを介して貯湯タンク２の底部に戻す熱媒体加熱回路８を設け、暖房端末から戻された低温の熱媒体を熱交換器７において高温のタンク水により加熱するようにしている。また、暖房戻り管路６２に液々熱交換器７と並列にバイパス弁６３を介設し、熱媒体の循環量が所定量以上になったときにバイパス弁６３を開いて、液々熱交換器７での圧力損失の低減を図るようにしている。   The heating circuit 6 includes a heating forward line 61 that sends a heat medium heated by the heating heat source unit 52 to a heating terminal (not shown), and a heating return line 62 that returns the heat medium that has passed through the heating terminal. ing. Then, the heat exchanger 7 is provided in the heating return pipe 62 and the high-temperature tank water at the top of the hot water storage tank 2 is returned to the bottom of the hot water storage tank 2 through the heat exchanger 7 and the circulation pump 81. A heating circuit 8 is provided so that the low-temperature heat medium returned from the heating terminal is heated by the high-temperature tank water in the heat exchanger 7. Further, a bypass valve 63 is provided in the heating return pipe 62 in parallel with the liquid-to-liquid heat exchanger 7, and when the circulation amount of the heat medium exceeds a predetermined amount, the bypass valve 63 is opened and the liquid-to-liquid heat exchange is performed. The pressure loss in the vessel 7 is reduced.

図２を参照して、外装ケーシング３は、底板３１と、底板３１上に設けたフレーム枠３２と、フレーム枠３２にこれを覆うようにして取付けられる、図示省略した前板、後板、左右の側板及び天板とで構成されている。   Referring to FIG. 2, the exterior casing 3 includes a bottom plate 31, a frame frame 32 provided on the bottom plate 31, and a front plate, a rear plate, left and right not shown, which are attached to the frame frame 32 so as to cover the frame. Side plate and top plate.

外装ケーシング３内には、前記熱交換器７が収納されている。熱交換器７は、熱媒体加熱回路８に循環するタンク水が流れる外管７ａと、暖房回路６に循環する熱媒体が流れる内管７ｂとの内外２重の管状に形成され（図４参照）、高温のタンク水と低温の熱媒体との間の熱交換で熱媒体を加熱する。   The heat exchanger 7 is accommodated in the outer casing 3. The heat exchanger 7 is formed into an inner and outer double tube, an outer tube 7a through which tank water circulating in the heating medium heating circuit 8 flows and an inner tube 7b through which the heating medium circulating in the heating circuit 6 flows (see FIG. 4). ), Heating the heat medium by heat exchange between the high temperature tank water and the low temperature heat medium.

また、熱交換器７は、図２、図３に示す如く、貯湯タンク２の前方位置で横方向にのびる上下複数本（図示例では４本）の横管部７１と、各横管部７１を上方に隣接する横管部７１と下方に隣接する横管部７１とに夫々接続する横方向一方と他方のＵターン部７２とを有する。そして、熱交換器７の最上側の横管部７１の末端において、外管７ａと内管７ｂとに夫々熱媒体加熱回路８の上流側の管８ａと暖房戻り管路６２の下流側の管６２ｂとを接続し、最下側の横管部７１の末端において、外管７ａと内管７ｂとに夫々熱媒体加熱回路８の下流側の管８ｂと暖房戻り管路６２の上流側の管６２ａとを接続している。また、各Ｕターン部７２は、貯湯タンク２の横側方に位置するように横管部７１に対し後方に屈曲している。即ち、各Ｕターン部７２は、貯湯タンク２の横側方に位置するように横管部７１に対し屈曲して後方にのびる直管部７２ａと、直管部７２ａの後端のＵ字状の曲管部７２ｂとで構成されている。   2 and 3, the heat exchanger 7 includes a plurality of upper and lower (four in the illustrated example) horizontal pipe portions 71 extending in the horizontal direction at the front position of the hot water storage tank 2, and each horizontal pipe portion 71. Are connected to a horizontal pipe portion 71 adjacent to the upper side and a horizontal pipe portion 71 adjacent to the lower side, respectively, and one U-turn portion 72 on the other side. Then, at the end of the uppermost horizontal pipe portion 71 of the heat exchanger 7, the outer pipe 7 a and the inner pipe 7 b are respectively connected to the upstream pipe 8 a of the heating medium heating circuit 8 and the downstream pipe of the heating return pipe 62. 62b, and at the end of the lowermost horizontal pipe portion 71, the outer pipe 7a and the inner pipe 7b are respectively connected to the downstream pipe 8b of the heating medium heating circuit 8 and the upstream pipe of the heating return pipe 62. 62a is connected. Each U-turn portion 72 is bent backward with respect to the horizontal tube portion 71 so as to be located on the lateral side of the hot water storage tank 2. That is, each U-turn part 72 is bent with respect to the horizontal pipe part 71 so as to be located on the lateral side of the hot water storage tank 2 and extends backward, and a U-shape at the rear end of the straight pipe part 72a. And the curved pipe portion 72b.

また、貯湯タンク２は、放熱を防止するために、発泡ウレタン等の断熱材料製のカバー２ａで被覆されている。そして、カバー２ａの横側部外面に、図４に示す如く、Ｕターン部７２を受け入れる凹部２ｂを形成し、更に、凹部２ｂに挿入したＵターン部７２を外方から覆う発泡ウレタン等の断熱材料製の蓋体２ｃをカバー２ａに着脱自在に取付けている。   The hot water storage tank 2 is covered with a cover 2a made of a heat insulating material such as urethane foam in order to prevent heat dissipation. Then, as shown in FIG. 4, a concave portion 2b that receives the U-turn portion 72 is formed on the outer surface of the lateral side portion of the cover 2a, and heat insulation such as urethane foam that covers the U-turn portion 72 inserted into the concave portion 2b from the outside. A lid 2c made of material is detachably attached to the cover 2a.

ここで、凹部２ｂは、カバー２ａの前面に達するように形成されている。そして、Ｕターン部７２に蓋体２ｃを被せた状態で、Ｕターン部７２を蓋体２ｃと一緒に前方から凹部２ｂに挿脱自在としている。尚、横管部７１は、放熱を防止するため、断熱チューブ７１ａで被覆されている。   Here, the recess 2b is formed to reach the front surface of the cover 2a. Then, the U-turn portion 72 can be inserted into and removed from the concave portion 2b together with the lid body 2c in a state where the U-turn portion 72 is covered with the lid body 2c. The horizontal tube portion 71 is covered with a heat insulating tube 71a in order to prevent heat dissipation.

上述した本実施形態によれば、熱交換器７が貯湯タンク２の前方に位置する横管部７１と、貯湯タンク２の横側方に位置するＵターン部７２とで構成されるため、外装ケーシング３の前板を取り外すことで、ケーシング前面から熱交換器７を容易に脱着できるようになり、メンテナンス性が向上する。また、Ｕターン部７２を横管部７１に対し後方に屈曲させることにより、外装ケーシング３の奥行きを有効に活用して、Ｕターン部７２の直管部７２ａの前後長を長くすることができる。その結果、熱交換器７の全長を長くして、熱交換器７での熱交換効率も確保できる。   According to the above-described embodiment, the heat exchanger 7 is configured by the horizontal pipe portion 71 positioned in front of the hot water storage tank 2 and the U-turn portion 72 positioned laterally of the hot water storage tank 2. By removing the front plate of the casing 3, the heat exchanger 7 can be easily detached from the front surface of the casing, and the maintainability is improved. Further, by bending the U-turn portion 72 rearward with respect to the horizontal tube portion 71, the depth of the outer casing 3 can be effectively utilized, and the front-rear length of the straight tube portion 72a of the U-turn portion 72 can be increased. . As a result, the overall length of the heat exchanger 7 can be increased, and the heat exchange efficiency in the heat exchanger 7 can be ensured.

また、貯湯タンク２を被覆するカバー２ａの横側部外面に、Ｕターン部７２を受け入れる凹部２ｂを形成するため、横方向一方のＵターン部７２と横方向他方のＵターン部７２との間の横幅を凹部２ｂの分だけ短縮でき、その分外装ケーシング３の横幅も短縮することができ、貯湯タンクユニット１のコンパクト化を図ることができる。   Moreover, in order to form the recessed part 2b which accepts the U-turn part 72 in the lateral side part outer surface of the cover 2a which coat | covers the hot water storage tank 2, between the horizontal direction one U-turn part 72 and the horizontal direction other U-turn part 72, The lateral width of the outer casing 3 can be shortened accordingly, and the hot water storage tank unit 1 can be made compact.

また、横管部７１は断熱チューブ７１ａで被覆できるが、ある程度の厚さを持つ断熱チューブは屈曲させ難く、Ｕターン部７２をこのような断熱チューブで被覆することは困難である。然し、本実施形態では、カバー２ａの凹部２ｂに挿入したＵターン部７２を蓋体２ｃで外方から覆うため、Ｕターン部７２を断熱チューブで被覆しなくても、Ｕターン部７２での放熱を防止できる。   Further, although the horizontal tube portion 71 can be covered with the heat insulating tube 71a, the heat insulating tube having a certain thickness is difficult to bend and it is difficult to cover the U-turn portion 72 with such a heat insulating tube. However, in this embodiment, since the U-turn portion 72 inserted into the recess 2b of the cover 2a is covered from the outside with the lid 2c, the U-turn portion 72 is not covered with the heat-insulating tube. Heat dissipation can be prevented.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、カバー２ａの前面に、熱交換器７の横管部７１を受け入れる凹部を形成すると共に、横管部７１を外方から覆う蓋体をカバー２ａに着脱自在に取付けてもよい。また、上記実施形態の熱交換器７は、内外２重の管状に形成されているが、タンク水が流れる管と他の流体が流れる管とを抱き合わせた形態の管状に形成することも可能である。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, a recess that receives the horizontal tube portion 71 of the heat exchanger 7 may be formed on the front surface of the cover 2a, and a lid that covers the horizontal tube portion 71 from the outside may be detachably attached to the cover 2a. Moreover, although the heat exchanger 7 of the said embodiment is formed in the inside and outside double tube shape, it is also possible to form in the tube shape of the form which united the tube through which tank water flows, and the tube through which other fluid flows. is there.

また、上記実施形態では、は、タンク水を加熱する加熱装置（ヒートポンプユニット）４に加えて補助熱源機５を設けたハイブリッド型貯湯式給湯暖房装置用の貯湯タンクユニット１に本発明を適用したものであるが、補助熱源機５を設けない貯湯式給湯暖房装置用や貯湯式給湯装置用の貯湯タンクユニットであっても、加熱装置４で加熱された流体とタンク水との熱交換を行う熱交換器を外装ケーシング３内に収納する場合には、同様に本発明を適用できる。尚、加熱装置４は、太陽熱集熱器や燃料電池等のヒートポンプユニット以外のものであってもよい。   Moreover, in the said embodiment, this invention was applied to the hot water storage tank unit 1 for the hybrid type hot water storage type hot water supply and heating apparatus provided with the auxiliary heat source unit 5 in addition to the heating device (heat pump unit) 4 for heating the tank water. Although it is a thing, even if it is a hot water storage tank unit for hot water storage hot water heaters and hot water storage hot water heaters that do not have the auxiliary heat source device 5, heat exchange between the fluid heated by the heating device 4 and the tank water is performed. When the heat exchanger is housed in the outer casing 3, the present invention can be similarly applied. The heating device 4 may be other than a heat pump unit such as a solar heat collector or a fuel cell.

１…貯湯タンクユニット、２…貯湯タンク、２ａ…カバー、２ｂ…凹部、２ｃ…蓋体、３…外装ケーシング、７…熱交換器、７ａ…外管（タンク水を流す管）、７ｂ…内管（他の流体を流す管）、７１…横管部、７２…Ｕターン部。   DESCRIPTION OF SYMBOLS 1 ... Hot water storage tank unit, 2 ... Hot water storage tank, 2a ... Cover, 2b ... Recessed part, 2c ... Lid, 3 ... Exterior casing, 7 ... Heat exchanger, 7a ... Outer pipe (pipe for flowing tank water), 7b ... Inside A pipe (a pipe through which another fluid flows), 71 ... a horizontal pipe part, 72 ... a U-turn part.

Claims (3)

貯湯タンクと、貯湯タンクを収納する直方体形状の外装ケーシングとを備える貯湯タンクユニットであって、外装ケーシング内に、貯湯タンク内のタンク水を流す管と他の流体を流す管とを有し、タンク水と他の流体との間で熱交換させる管状の熱交換器を収納するものにおいて、
熱交換器は、貯湯タンクの前方位置で横方向にのびる上下複数の横管部と、各横管部を上方に隣接する横管部と下方に隣接する横管部とに夫々接続する横方向一方と他方のＵターン部とを有し、
各Ｕターン部は、貯湯タンクの横側方に位置するように横管部に対し後方に屈曲していることを特徴とする貯湯タンクユニット。 A hot water storage tank unit including a hot water storage tank and a rectangular parallelepiped outer casing for storing the hot water storage tank, and the outer casing has a pipe for flowing the tank water in the hot water storage tank and a pipe for flowing other fluid, In a tubular heat exchanger that exchanges heat between tank water and other fluids,
The heat exchanger has a plurality of upper and lower horizontal pipe portions extending in the horizontal direction at the front position of the hot water storage tank, and each horizontal pipe portion is connected to an upper adjacent horizontal pipe portion and a lower adjacent horizontal pipe portion, respectively. One and the other U-turn part,
Each U-turn part is bent backward with respect to a horizontal pipe part so that it may be located in the side of a hot water storage tank, The hot water storage tank unit characterized by the above-mentioned. 請求項１記載の貯湯タンクユニットであって、貯湯タンクを被覆する断熱材料製のカバーが設けられるものにおいて、
カバーの外面に、少なくとも前記Ｕターン部を受け入れる凹部が形成されることを特徴とする貯湯タンクユニット。 The hot water storage tank unit according to claim 1, wherein a cover made of a heat insulating material covering the hot water storage tank is provided.
A hot water storage tank unit characterized in that a recess for receiving at least the U-turn part is formed on the outer surface of the cover. 前記凹部に挿入した前記Ｕターン部を外方から覆う断熱材料製の蓋体が前記カバーに着脱自在に取付けられることを特徴とする請求項２記載の貯湯タンクユニット。   The hot water storage tank unit according to claim 2, wherein a lid made of a heat insulating material that covers the U-turn portion inserted into the concave portion from the outside is detachably attached to the cover.
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KR20170125779A (en) * 2015-12-31 2017-11-15 김희선 Hopper Heater
KR101805857B1 (en) * 2015-12-31 2017-12-07 김희선 Hopper Heater
JP2018084393A (en) * 2016-11-25 2018-05-31 株式会社ノーリツ Heat exchanger and storage type hot water supply device

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JP2013185740A (en) * 2012-03-07 2013-09-19 Mitsubishi Electric Corp Heat insulation material for hot water storage tank and hot water storage type water heater
KR20170125779A (en) * 2015-12-31 2017-11-15 김희선 Hopper Heater
KR101805857B1 (en) * 2015-12-31 2017-12-07 김희선 Hopper Heater
KR102271743B1 (en) * 2015-12-31 2021-06-30 김희선 Hopper Heater
JP2018084393A (en) * 2016-11-25 2018-05-31 株式会社ノーリツ Heat exchanger and storage type hot water supply device

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