JP2008107025A

JP2008107025A - Water-refrigerant heat exchanger

Info

Publication number: JP2008107025A
Application number: JP2006290946A
Authority: JP
Inventors: Osamu Aoyanagi; 治青柳
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2008-05-08

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-refrigerant heat exchanger, having excellent durability of scale, and achieving high performance and miniaturization. <P>SOLUTION: This water-refrigerant heat exchanger includes: a substantially square box in which the interior is partitioned to form a meandering water passage; a first heat exchanger 11 constructed by a tubular refrigerant passage disposed along the water passage; and a second heat exchanger 12 constructed by an inner pipe where a refrigerant passage is formed in the interior and an outer pipe forming a water passage in a space up to the inner pipe, and bent spirally. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、水冷媒熱交換器に関するもので、特に、ヒートポンプ式給湯機や暖房機等において、冷媒と水との間で熱交換を行うために使用されるものである。 The present invention relates to a water-refrigerant heat exchanger, and is particularly used for heat exchange between a refrigerant and water in a heat pump type hot water heater or a heater.

従来の熱交換器は、２重管式熱交換器が一般的であり、図４〜図７に示す。図４は従来の水冷媒熱交換器の下方正面図、図５は従来の水冷媒熱交換器の上方正面図、図６は従来の水冷媒熱交換器の側面図、図７は従来の水冷媒熱交換器の断面図である。従来の２重管式熱交換器２０１は上段の２重管式熱交換器２０２と下段の２重管式熱交換器２０３を段状に積層した構成を有している。２重管式熱交換器２０２、２の断面は、図7に示すように、外管２０６と内管２０８と、内管２０８の外周に密着するように設けた検知管２０７から構成されている。この従来例によれば、内管２１０の内部を冷媒、検知管の外側で外管２０６の内側の環状流路２０９を水が流れ、冷媒と水が熱交換させれる。水は温度が高くなると、水に溶け込んでいたスケールが析出しやすくなることから、２重管式熱交換器２０２の環状流路より２重管式熱交換器２０１の環状流路の方の面積を大きくすることにより、スケールの堆積を抑制するものである(例えば、特許文献１参照)。
特開２００５−１４７５６９号公報 Conventional heat exchangers are generally double pipe heat exchangers and are shown in FIGS. 4 is a lower front view of a conventional water refrigerant heat exchanger, FIG. 5 is an upper front view of the conventional water refrigerant heat exchanger, FIG. 6 is a side view of the conventional water refrigerant heat exchanger, and FIG. It is sectional drawing of a refrigerant | coolant heat exchanger. A conventional double-pipe heat exchanger 201 has a configuration in which an upper double-pipe heat exchanger 202 and a lower double-pipe heat exchanger 203 are stacked in a step shape. As shown in FIG. 7, the cross section of the double-pipe heat exchangers 202 and 2 includes an outer tube 206, an inner tube 208, and a detection tube 207 provided so as to be in close contact with the outer periphery of the inner tube 208. . According to this conventional example, the coolant flows inside the inner tube 210, and water flows through the annular flow path 209 inside the outer tube 206 outside the detection tube, so that heat is exchanged between the coolant and water. As the temperature of water increases, the scale dissolved in the water tends to precipitate, so the area of the annular channel of the double-pipe heat exchanger 201 is larger than the annular channel of the double-pipe heat exchanger 202. By increasing the value, the accumulation of scale is suppressed (see, for example, Patent Document 1).
JP 2005-147469 A

しかしながら、上記従来の２重管式熱交換器２０１、２０２の構成では、渦巻状に曲げ加工する際、最小の曲げ半径の限界は外管の外径で決まり、それ以下にすると外管が潰れて座屈してしまう。その際、内管は十分余裕がある曲げＲとなる。このため図５，６のように渦巻状に形成すると内側に大きな空間ができてしまい、小型化ができないという課題を有していた。 However, in the configuration of the conventional double tube heat exchangers 201 and 202 described above, when bending in a spiral shape, the limit of the minimum bending radius is determined by the outer diameter of the outer tube, and if it is less than that, the outer tube is crushed. Will buckle. At that time, the inner pipe has a bending radius with a sufficient margin. For this reason, when it was formed in a spiral shape as shown in FIGS. 5 and 6, a large space was formed inside, and there was a problem that miniaturization could not be achieved.

本発明は、前記従来の課題を解決するもので、スケールの耐久性にも優れ、高性能で小型化が図ることができる水冷媒熱交換器を提供することを目的とする。 The present invention solves the above-described conventional problems, and an object thereof is to provide a water-refrigerant heat exchanger that is excellent in scale durability, high performance, and can be downsized.

前記従来の課題を解決するために、本発明の水冷媒熱交換器は、内部に仕切りを設けて蛇行させるような水流路を形成する略方形状の箱体と前記水流路に沿うように配設された管状の冷媒流路で構成される第１熱交換器と、内部に冷媒流路が形成された内管と前記内管との間に水流路が形成された外管とで構成され、渦巻状に曲成された第２熱交換器とから構成されることを特徴とすることにより、冷媒の温度に応じてそれぞれの長所を活かすことができ、高性能で、耐久性に優れ、コンパクト化を図ることができる。 In order to solve the above-mentioned conventional problems, the water refrigerant heat exchanger of the present invention is arranged so as to follow a substantially rectangular box that forms a water flow path provided with a partition inside and to meander. A first heat exchanger configured with a tubular refrigerant flow path provided; an inner pipe having a refrigerant flow path formed therein; and an outer pipe having a water flow path formed between the inner pipe and the inner pipe. The second heat exchanger is formed in a spiral shape, so that each advantage can be utilized according to the temperature of the refrigerant, high performance, excellent durability, Compactness can be achieved.

本発明は、スケールの耐久性にも優れ、高性能で小型化が図ることができる水冷媒熱交換器を提供することができる。 INDUSTRIAL APPLICABILITY The present invention can provide a water refrigerant heat exchanger that has excellent scale durability, high performance, and can be downsized.

第１の発明の水冷媒熱交換器は、内部に仕切りを設けて蛇行させるような水流路を形成する略方形状の箱体と、前記水流路に沿うように配設された管状の冷媒流路とで構成される第１熱交換器と、内部に冷媒流路が形成された内管と、前記内管との間に水流路が形成された外管とで構成され、渦巻状に曲成された第２熱交換器とから構成されることを特徴とすることにより、冷媒の温度に応じてそれぞれの長所を活かすことができ、高性能で、
耐久性に優れ、コンパクト化を図ることができる。 A water refrigerant heat exchanger according to a first aspect of the present invention includes a substantially rectangular box that forms a water flow path that is provided with a partition inside to meander, and a tubular refrigerant flow arranged along the water flow path. A first heat exchanger composed of a channel, an inner tube having a coolant channel formed therein, and an outer tube having a water channel formed between the inner tube and curved in a spiral shape. By comprising the second heat exchanger formed, it is possible to take advantage of each advantage according to the temperature of the refrigerant, high performance,
It is excellent in durability and can be made compact.

第２の発明の水冷媒熱交換器は、特に第１の発明において、水が流入する水入口側の流路断面積よりも水が流出する水出口側の流路断面積の方が大きいことを特徴とすることにより、水の高温域で多少のスケールが析出しても水の流動抵抗の増大を抑制でき、熱交換器の性能低下を抑制できる。 In the water refrigerant heat exchanger of the second invention, in particular in the first invention, the flow passage cross-sectional area on the water outlet side where water flows out is larger than the flow passage cross-sectional area on the water inlet side where water flows in. Thus, even if some scale is deposited in a high temperature region of water, an increase in the flow resistance of water can be suppressed, and a decrease in performance of the heat exchanger can be suppressed.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

（実施の形態１）
図１は、本発明の実施の形態１における熱交換器１１の正面図、図２は図1の第１の熱交換器１２の断面図、図３は図1の第２の熱交換器１２の断面図である。 (Embodiment 1)
1 is a front view of a heat exchanger 11 according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a first heat exchanger 12 in FIG. 1, and FIG. 3 is a second heat exchanger 12 in FIG. FIG.

図１において、第１の熱交換器１１内に、直線部１３１と曲げ部１３２で構成された内管と、前記内管に沿って流路１５を形成するように設けた仕切り１４で構成される。また、第２の熱交換器１２は、直線部１７１と曲げ部１７２で構成された外管と、前記外管内に設けた内管１３と、外管１７１、１７２と、内管１３との間に設けられた流路１６で構成される。ここで、第１の熱交換器１１内の流路１５の断面積より、第２の熱交換器１２内の流路１６の断面積の方が大きい流路を有している。 In FIG. 1, it is comprised in the 1st heat exchanger 11 with the inner pipe comprised by the linear part 131 and the bending part 132, and the partition 14 provided so that the flow path 15 might be formed along the said inner pipe. The The second heat exchanger 12 includes an outer tube composed of a straight portion 171 and a bent portion 172, an inner tube 13 provided in the outer tube, outer tubes 171, 172, and the inner tube 13. It is comprised by the flow path 16 provided in this. Here, the cross-sectional area of the flow path 16 in the second heat exchanger 12 is larger than the cross-sectional area of the flow path 15 in the first heat exchanger 11.

以上のように構成された熱交換器について、以下その動作、作用を説明する。 About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

図１において、低温の水は第１の熱交換器１１のＡ側から流入し、第１の熱交換器内に設けられた仕切り１４により形成された水流路１５を通り、Ｂ側から流出する。その後、第２の熱交換器１２内の内管１３の外周である水流路１６を通り、Ｃ側に流出する。また、高温の冷媒は第２の熱交換器１２のＸ側から流入し、水と冷媒が互いに熱交換する。一方、冷媒側は第２の熱交換器１２のＸ側から流入し、内管１３内を通り、Ｙ側に流出し、第１の熱交換器１１内の、Ｚ側に流出する。 In FIG. 1, low-temperature water flows in from the A side of the first heat exchanger 11, passes through the water flow path 15 formed by the partition 14 provided in the first heat exchanger, and flows out from the B side. . Then, it passes through the water flow path 16 which is the outer periphery of the inner tube 13 in the second heat exchanger 12 and flows out to the C side. Moreover, a high temperature refrigerant | coolant flows in from the X side of the 2nd heat exchanger 12, and water and a refrigerant | coolant mutually heat-exchange. On the other hand, the refrigerant side flows in from the X side of the second heat exchanger 12, passes through the inner pipe 13, flows out to the Y side, and flows out to the Z side in the first heat exchanger 11.

以上のように本実施の形態においては、収納をコンパクトにするために曲げ加工を必要とする伝熱管を、管径の小さい内管のみを曲げ加工することで曲げ部１３２の曲げ半径を小さくでき、コンパクトに収納できる。これにより、冷媒管の本数を限られた容積内により多く収納でき、高性能化が図れる。また、水が高温になる領域では、曲げ半径の大きい曲げ部１７２で構成し、流路断面積の大きい流路１６にすることにより、水が流動する流路１６の流れをスムーズにすることができ、さらに断面積を大きくすることにより、高温になった際に析出するスケールの堆積を抑制できる。このように、高性能化が図れる熱交換器１１と、スケールの堆積を抑制する構成の熱交換器１２を組み合わせることで、高性能でかつスケールの耐久性にも優れた熱交換器が得られるものである。 As described above, in the present embodiment, it is possible to reduce the bending radius of the bending portion 132 by bending only the inner tube having a small tube diameter for the heat transfer tube that needs to be bent in order to make the housing compact. Can be stored compactly. As a result, a larger number of refrigerant tubes can be accommodated in the limited volume, and higher performance can be achieved. Further, in a region where water becomes high in temperature, the flow path 16 through which water flows can be made smooth by forming the flow path 16 having a large flow path cross-sectional area with the bending portion 172 having a large bending radius. Further, by increasing the cross-sectional area, it is possible to suppress the deposition of scales that precipitate when the temperature becomes high. In this way, by combining the heat exchanger 11 capable of improving performance and the heat exchanger 12 configured to suppress the accumulation of scale, a heat exchanger having high performance and excellent scale durability can be obtained. Is.

以上のように、本発明にかかる水冷媒熱交換器は、コンパクトに構成されるので、ヒートポンプ給湯機や暖房機をコンパクトに構成することができる。 As mentioned above, since the water-refrigerant heat exchanger concerning this invention is comprised compactly, a heat pump water heater and a heater can be comprised compactly.

本発明の実施の形態１における水冷媒熱交換器の正面図The front view of the water refrigerant heat exchanger in Embodiment 1 of this invention 同実施の形態における第１の熱交換器の断面図Sectional drawing of the 1st heat exchanger in the embodiment 同実施の形態における第２の熱交換器の断面図Sectional drawing of the 2nd heat exchanger in the embodiment 従来の水冷媒熱交換器の下方正面図Lower front view of conventional water refrigerant heat exchanger 従来の水冷媒熱交換器の上方正面図Upper front view of conventional water refrigerant heat exchanger 従来の水冷媒熱交換器の側面図Side view of a conventional water refrigerant heat exchanger 従来の水冷媒熱交換器の断面図Cross-sectional view of a conventional water refrigerant heat exchanger

符号の説明Explanation of symbols

１１第１の熱交換器
１２第２の熱交換器 11 1st heat exchanger 12 2nd heat exchanger

Claims

内部に仕切りを設けて蛇行させるような水流路を形成する略方形状の箱体と、前記水流路に沿うように配設された管状の冷媒流路とで構成される第１熱交換器と、
内部に冷媒流路が形成された内管と、前記内管との間に水流路が形成された外管とで構成され、渦巻状に曲成された第２熱交換器とから構成されることを特徴とする水冷媒熱交換器。 A first heat exchanger composed of a substantially rectangular box that forms a water flow path that is meandered by providing a partition inside, and a tubular refrigerant flow path disposed along the water flow path; ,
Consists of an inner tube having a coolant channel formed therein and an outer tube having a water channel formed between the inner tube and a second heat exchanger formed in a spiral shape. A water refrigerant heat exchanger characterized by that.

水が流入する水入口側の流路断面積よりも水が流出する水出口側の流路断面積の方が大きいことを特徴とする請求項１に記載の水冷媒熱交換器。 The water-refrigerant heat exchanger according to claim 1, wherein a channel cross-sectional area on the water outlet side from which water flows out is larger than a channel cross-sectional area on the water inlet side into which water flows in.