JP7280958B2 - Water heat exchanger, method for manufacturing water heat exchanger, and refrigeration cycle device - Google Patents

Water heat exchanger, method for manufacturing water heat exchanger, and refrigeration cycle device Download PDF

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JP7280958B2
JP7280958B2 JP2021543651A JP2021543651A JP7280958B2 JP 7280958 B2 JP7280958 B2 JP 7280958B2 JP 2021543651 A JP2021543651 A JP 2021543651A JP 2021543651 A JP2021543651 A JP 2021543651A JP 7280958 B2 JP7280958 B2 JP 7280958B2
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heat exchanger
refrigerant
water heat
refrigeration cycle
joint
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JPWO2021044760A1 (en
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峻 浅利
覚 岡田
敦史 馬場
晃平 丸子
優子 脇坂
賢 三浦
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Toshiba Carrier Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0071—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing
    • F28F2275/045—Fastening; Joining by brazing with particular processing steps, e.g. by allowing displacement of parts during brazing or by using a reservoir for storing brazing material

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

本発明に係る実施形態は、水熱交換器、水熱交換器の製造方法、および冷凍サイクル装置に関する。 Embodiments of the present invention relate to a water heat exchanger, a method for manufacturing a water heat exchanger, and a refrigeration cycle device.

温度制御装置、例えばチラーは、温度制御対象である物、または空間を冷却または加熱する利用側ユニットと、冷凍サイクルユニット（以下、「冷凍サイクル装置」ともいう。）と、を備えている。冷凍サイクル装置は、圧縮機と、第１の熱交換器と、膨張装置と、第２の熱交換器と、四方弁と、を備えている。冷凍サイクル装置が加熱運転されると、チラーを循環する液体が加熱される。冷凍サイクル装置が冷却運転されると、チラーを循環する液体が冷却される。 A temperature control device, such as a chiller, includes a user-side unit that cools or heats a temperature-controlled object or space, and a refrigeration cycle unit (hereinafter also referred to as a “refrigeration cycle device”). A refrigeration cycle device includes a compressor, a first heat exchanger, an expansion device, a second heat exchanger, and a four-way valve. When the refrigeration cycle device is operated for heating, the liquid circulating through the chiller is heated. When the refrigeration cycle device is operated for cooling, the liquid circulating through the chiller is cooled.

冷凍サイクル装置に利用される熱交換器として、プレート式の水熱交換器が知られている。プレート式の水熱交換器は、積層された複数の薄い熱交換プレートを備えている。複数の熱交換プレートには、チラーを循環する液体の流路を有する熱交換プレートと、冷凍サイクル装置を循環する冷媒の流路を有する熱交換プレートと、が含まれている。この水熱交換器は、チラーを循環する液体と冷凍サイクル装置を流れる冷媒との間で熱交換を行う。 A plate-type water heat exchanger is known as a heat exchanger used in a refrigeration cycle apparatus. A plate-type water heat exchanger comprises a plurality of laminated thin heat exchange plates. The plurality of heat exchange plates includes a heat exchange plate having a liquid flow path that circulates in the chiller and a heat exchange plate that has a refrigerant flow path that circulates in the refrigeration cycle device. This water heat exchanger exchanges heat between the liquid circulating in the chiller and the refrigerant flowing in the refrigeration cycle device.

プレート式の水熱交換器は、積層された複数の熱交換プレートを挟み込んで固定する一対のカバープレートを備えている。カバープレートには熱交換プレートから離れる方向（反対方向、外向き方向）に伸びる継手が設けられている。冷媒が流通する配管は継手を介して水熱交換器に接続される。 A plate-type water heat exchanger includes a pair of cover plates that sandwich and fix a plurality of stacked heat exchange plates. The cover plate is provided with joints extending away from the heat exchange plate (opposite direction, outward direction). A pipe through which the refrigerant flows is connected to the water heat exchanger via a joint.

カバープレートや熱交換プレートの材質は、ステンレスやアルミニウムなどの金属である。継手の材質もカバープレートと同じである。一方、冷凍サイクル装置を流れる冷媒の配管の材質は銅である。このように、水熱交換器の冷媒の出入口は、例えば、ステンレスと銅といった異種の金属で構成される。異種の金属は、例えば、ろう付けにより接合される。 The material of the cover plate and the heat exchange plate is metal such as stainless steel or aluminum. The material of the joint is also the same as that of the cover plate. On the other hand, the material of the piping for the refrigerant flowing through the refrigeration cycle device is copper. In this way, the refrigerant inlet/outlet of the water heat exchanger is made of different metals such as stainless steel and copper. Dissimilar metals are joined, for example, by brazing.

近年、オゾン層への影響が少なく、地球温暖化への影響が小さいトリフルオロヨードメタン（ＣＦ３Ｉ、以下、「ＣＦ３Ｉ」と記載する。）などのヨードカーボン類を含む冷媒を冷凍サイクル装置へ採用することが検討されるようになった。 In recent years, refrigerants containing iodocarbons such as trifluoroiodomethane (CF3I, hereinafter referred to as "CF3I"), which have less impact on the ozone layer and less impact on global warming, have been adopted in refrigeration cycle devices. has come to be considered.

しかしながら、ヨードカーボン類は、ヨウ素原子と炭素原子との結合が切断されやすい性質をもつ。ろう材に含まれる亜鉛は、例えば、水を触媒としてハロゲンと反応する。水の存在下で、亜鉛を含むろう材とヨードカーボン類を含む冷媒とが接触すると、亜鉛を含むろう材の腐食の原因となる。ろう材の腐食は、冷媒の漏えいの原因となる。また亜鉛とハロゲン原子とが反応して冷媒が分解される虞がある。 However, iodocarbons have the property that the bond between the iodine atom and the carbon atom is easily broken. Zinc contained in the brazing filler metal reacts with halogen using, for example, water as a catalyst. Contact between a brazing filler metal containing zinc and a coolant containing iodocarbons in the presence of water causes corrosion of the brazing filler metal containing zinc. Corrosion of the brazing filler metal causes refrigerant leakage. In addition, zinc and halogen atoms may react with each other to decompose the refrigerant.

また、亜鉛を触媒としてＣＦ３Ｉが分解してヨウ素が生成されることが知られている。亜鉛を含むろう材とＣＦ３Ｉを含む冷媒とが接触すると、ろう材に含まれる亜鉛がＣＦ３Ｉのヨウ素原子と反応し、冷媒が分解される虞がある。 It is also known that CF3I is decomposed with zinc as a catalyst to produce iodine. When the brazing filler metal containing zinc and the refrigerant containing CF3I come into contact with each other, the zinc contained in the brazing filler metal may react with the iodine atoms of CF3I to decompose the refrigerant.

特表２０１２－５０６０２３号公報Japanese Patent Publication No. 2012-506023 特開２０１０－１５９３１０号公報JP 2010-159310 A

本発明が解決しようとする課題は、ろう材の腐食および冷媒の劣化を防止可能な水熱交換器、水熱交換器の製造方法、および冷凍サイクル装置を提供することである。 The problem to be solved by the present invention is to provide a water heat exchanger, a method for manufacturing the water heat exchanger, and a refrigeration cycle device that can prevent corrosion of the brazing material and deterioration of the refrigerant.

実施形態の水熱交換器は、積層された複数の熱交換プレートと、前記複数の熱交換プレートを挟み込む一対のカバープレートと、前記一対のカバープレートの少なくとも一方に設けられる継手と、前記継手に亜鉛を含むろう材によって接合される冷媒管と、前記冷媒管および前記継手を介して前記複数の熱交換プレートに流通される、ヨードカーボン類を含む冷媒と前記ろう材との接触を防ぐよう設けられる保護部と、を備えている。
また、実施形態の水熱交換器の製造方法、ビニル樹脂を含む溶液に前記カバープレートと前記継手との接続部を浸漬して前記保護部を形成する。
さらに、実施形態の冷凍サイクル装置は、圧縮機と、膨張装置と、前記圧縮機、および前記膨張装置と接続し、蒸発器および凝集器の少なくともいずれか一方として機能する前記水熱交換器と、を備えている。 A water heat exchanger according to an embodiment comprises a plurality of laminated heat exchange plates, a pair of cover plates sandwiching the plurality of heat exchange plates, a joint provided to at least one of the pair of cover plates, and A refrigerant pipe joined by a brazing material containing zinc and a refrigerant containing iodocarbons, which flows through the plurality of heat exchange plates via the refrigerant pipe and the joint, is provided to prevent contact between the brazing material and the refrigerant pipe. and a protection part.
Further, in the method for manufacturing a water heat exchanger according to the embodiment, the connecting portion between the cover plate and the joint is immersed in a solution containing a vinyl resin to form the protective portion.
Further, the refrigeration cycle apparatus of the embodiment includes a compressor, an expansion device, the water heat exchanger connected to the compressor and the expansion device and functioning as at least one of an evaporator and a condenser, It has

本発明の実施形態に係る冷凍サイクル装置の模式図。BRIEF DESCRIPTION OF THE DRAWINGS The schematic diagram of the refrigerating-cycle apparatus which concerns on embodiment of this invention. 本発明の実施形態に係る水熱交換器の接続部の模式的な断面図。Typical sectional drawing of the connection part of the water heat exchanger which concerns on embodiment of this invention. 本発明の実施形態に係る水熱交換器の製造方法の一例を説明する図。The figure explaining an example of the manufacturing method of the water heat exchanger which concerns on embodiment of this invention.

本発明に係る水熱交換器、水熱交換器の製造方法、および冷凍サイクル装置の実施形態について、図１から図３を参照して説明する。なお、各図において同じ、または相当する構成には同一の符号を付す。 Embodiments of a water heat exchanger, a method for manufacturing a water heat exchanger, and a refrigeration cycle apparatus according to the present invention will be described with reference to FIGS. 1 to 3. FIG. In addition, the same reference numerals are given to the same or corresponding configurations in each figure.

図１は、本発明の実施形態に係る冷凍サイクル装置１００の模式図である。本実施形態に係るチラー２００は、冷凍サイクル装置１００と、利用側ユニット３００と、を備えている。本実施形態に係るチラー２００は、冷凍サイクル装置１００を流れる第１の冷媒と利用側ユニット３００を流れる第２の冷媒との間で熱交換することで、チラー２００の温度制御対象である物または空間を冷却または加熱する。 FIG. 1 is a schematic diagram of a refrigeration cycle apparatus 100 according to an embodiment of the invention. A chiller 200 according to this embodiment includes a refrigeration cycle device 100 and a user unit 300 . The chiller 200 according to the present embodiment exchanges heat between the first refrigerant flowing through the refrigeration cycle device 100 and the second refrigerant flowing through the user-side unit 300, so that the temperature of the chiller 200 is controlled. Cools or heats the space.

図１に示すように、冷凍サイクル装置１００は、圧縮機１と、第１の熱交換器２と、ファン３と、膨張装置４と、第２の熱交換器５と、アキュムレータ６と、四方弁７と、第１の冷媒管１０とを備えている。第１の熱交換器２、膨張装置４、第２の熱交換器５、アキュムレータ６、圧縮機１、および四方弁７は、第１の冷媒管１０により順次接続されている。 As shown in FIG. 1, the refrigeration cycle apparatus 100 includes a compressor 1, a first heat exchanger 2, a fan 3, an expansion device 4, a second heat exchanger 5, an accumulator 6, It has a valve 7 and a first refrigerant pipe 10 . The first heat exchanger 2 , the expansion device 4 , the second heat exchanger 5 , the accumulator 6 , the compressor 1 and the four-way valve 7 are sequentially connected by first refrigerant pipes 10 .

第１の冷媒管１０は、銅などの金属製である。第１の冷媒管１０は、第１の冷媒を流通させる。第１の冷媒は、例えば、ヨードカーボン類を含む混合冷媒である。ヨードカーボン類を含む混合冷媒とは、例えば、ＣＦ３Ｉを含む混合冷媒である。また、冷凍サイクル装置１００に使用される冷媒は、ジフルオロメタン（ＨＦＣ－３２、Ｒ３２、以下、「Ｒ３２」と記載する。）、ペンタフルオロエタン（ＨＦＣ１２５、Ｒ１２５、以下、「Ｒ１２５」と記載する。）及びＣＦ３Ｉの混合冷媒である。冷凍サイクル装置１００に使用される冷媒は、例えば、49.0重量パーセントのＲ３２と、11.5重量パーセントのＲ１２５と、39.5重量パーセントのＣＦ３Ｉと、を含む混合冷媒である。このような組成比（成分）の冷媒は、米国暖房冷凍空調学会（American Society of Heating, Refrigerating and Air-Conditioning Engineers, ASHRAE）のStandard 34に冷媒番号R466Aとして仮登録されている。 The first refrigerant pipe 10 is made of metal such as copper. The first refrigerant pipe 10 allows the first refrigerant to flow. The first refrigerant is, for example, a mixed refrigerant containing iodocarbons. A mixed refrigerant containing iodocarbons is, for example, a mixed refrigerant containing CF3I. Refrigerants used in the refrigeration cycle apparatus 100 are difluoromethane (HFC-32, R32, hereinafter referred to as "R32") and pentafluoroethane (HFC125, R125, hereinafter referred to as "R125". ) and CF3I. The refrigerant used in the refrigeration cycle device 100 is, for example, a mixed refrigerant containing 49.0 weight percent R32, 11.5 weight percent R125, and 39.5 weight percent CF3I. A refrigerant having such a composition ratio (component) is provisionally registered as refrigerant number R466A in Standard 34 of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).

圧縮機１は、第１の冷媒を圧縮する。圧縮機１は、例えば公知のインバーター制御によって運転周波数を変更可能なものであっても良いし、運転周波数を変更できないもの、つまり運転周波数が固定のものであっても良い。 Compressor 1 compresses the first refrigerant. The compressor 1 may be one whose operating frequency can be changed by, for example, a known inverter control, or one whose operating frequency cannot be changed, that is, one whose operating frequency is fixed.

第１の熱交換器２は、例えば、フィンアンドチューブ式の熱交換器である。第１の熱交換器２の近傍には、ファン３が配置されている。第１の熱交換器２は、ファン３から送られる空気と第１の熱交換器２内を通る第１の冷媒との間で熱交換を行う空気熱交換器である。 The first heat exchanger 2 is, for example, a fin-and-tube heat exchanger. A fan 3 is arranged near the first heat exchanger 2 . The first heat exchanger 2 is an air heat exchanger that exchanges heat between the air sent from the fan 3 and the first refrigerant passing through the first heat exchanger 2 .

膨張装置４は、例えばＰＭＶ（Pulse Motor Valve）である。膨張装置４は、弁開度を調節できる。膨張装置４は、例えば、貫通孔を有する弁本体と、貫通孔に対して進退可能なニードルと、ニードルを進退させる動力源と、を備えている。貫通孔をニードルで塞いだ場合、膨張装置４は、冷凍サイクル装置１００を流れる第１の冷媒の流通を止める（遮断する）。このとき、膨張装置４は閉じた状態であり、膨張装置４の開度は最も小さい。ニードルが貫通孔から最も離れた場合、冷凍サイクル装置１００の第１の冷媒の流通量は、最大化する。このとき、膨張装置４の開度は最も大きい。 The expansion device 4 is, for example, a PMV (Pulse Motor Valve). The expansion device 4 can adjust the valve opening degree. The expansion device 4 includes, for example, a valve body having a through hole, a needle that can move back and forth with respect to the through hole, and a power source that moves the needle back and forth. When the through-hole is closed with the needle, the expansion device 4 stops (blocks) the flow of the first refrigerant flowing through the refrigeration cycle device 100 . At this time, the expansion device 4 is in a closed state, and the degree of opening of the expansion device 4 is the smallest. When the needle is farthest from the through hole, the flow rate of the first refrigerant in refrigeration cycle device 100 is maximized. At this time, the opening degree of the expansion device 4 is the largest.

第２の熱交換器５は、加熱または冷却の対象である第２の冷媒管２０を流れる第２の冷媒と第１の冷媒管１０を流通する第１の冷媒との間で熱交換する。第２の冷媒は、例えば、水である。第２の冷媒は、ポンプ８により第２の冷媒管２０を介してチラー２００の循環ユニット（図示省略）から第２の熱交換器５に送られる。すなわち、第２の熱交換器５は、第１の冷媒管１０に流れる第１の冷媒と第２の冷媒管２０に流れる第２の冷媒としての水との間で熱交換を行う水熱交換器である。以下、第２の熱交換器５を単に水熱交換器５と呼ぶ。 The second heat exchanger 5 exchanges heat between the second refrigerant flowing through the second refrigerant pipe 20 to be heated or cooled and the first refrigerant flowing through the first refrigerant pipe 10 . The second coolant is, for example, water. A second refrigerant is sent from a circulation unit (not shown) of the chiller 200 to the second heat exchanger 5 via the second refrigerant pipe 20 by the pump 8 . That is, the second heat exchanger 5 performs heat exchange between the first refrigerant flowing in the first refrigerant pipe 10 and water as the second refrigerant flowing in the second refrigerant pipe 20. It is a vessel. The second heat exchanger 5 is hereinafter simply referred to as the water heat exchanger 5 .

水熱交換器５は、例えば、プレート式の水熱交換器である。水熱交換器５は、積層された複数の熱交換プレートと、積層された複数の熱交換プレートを、その積層方向から挟み込む一対のカバープレートと、を備えている。少なくとも一方のカバープレート１４は、冷媒の出入口としての複数の継手９を備えている。それぞれの熱交換プレートは、冷凍サイクル装置１００を流れる第１の冷媒の流路、およびチラー２００の循環ユニットを流れる第２の冷媒の流路を有している。なお、水熱交換器５と冷媒管（第１の冷媒管１０）との接続部については、図２で詳細に説明する。 The water heat exchanger 5 is, for example, a plate-type water heat exchanger. The water heat exchanger 5 includes a plurality of stacked heat exchange plates and a pair of cover plates sandwiching the plurality of stacked heat exchange plates from the stacking direction. At least one of the cover plates 14 has a plurality of joints 9 as inlets and outlets for the coolant. Each heat exchange plate has a flow path for the first refrigerant flowing through the refrigeration cycle device 100 and a flow path for the second refrigerant flowing through the circulation unit of the chiller 200 . The connecting portion between the water heat exchanger 5 and the refrigerant pipe (first refrigerant pipe 10) will be described in detail with reference to FIG.

アキュムレータ６は、水熱交換器５と圧縮機１との間に設けられている。アキュムレータ６は、鉄鋼等の金属製のケースを有している。ケースの下部には液相の冷媒が収容されている。ケースの上部には気相の冷媒が収容されている。アキュムレータ６は、気相の冷媒を圧縮機１に供給する。 The accumulator 6 is provided between the water heat exchanger 5 and the compressor 1 . The accumulator 6 has a metal case such as steel. The lower portion of the case accommodates liquid-phase refrigerant. The upper portion of the case accommodates a vapor-phase refrigerant. The accumulator 6 supplies gas-phase refrigerant to the compressor 1 .

四方弁７は、第１の冷媒の流れる向きを切り替えることで冷凍サイクル装置１００の加熱運転と冷却運転とを切り替える。 The four-way valve 7 switches between the heating operation and the cooling operation of the refrigeration cycle device 100 by switching the direction of flow of the first refrigerant.

冷凍サイクル装置１００が加熱運転する場合、水熱交換器５により第２の冷媒管２０を流れる水が加熱される。加熱運転の場合、第１の冷媒は、圧縮機１、水熱交換器５、膨張装置４、第１の熱交換器２、アキュムレータ６の順に流れる。圧縮機１で高温高圧の気体となった第１の冷媒は、水熱交換器５において水と熱交換して凝集し、液体に変化する。この際、水熱交換器５は、第１の冷媒を凝集させる凝集器として機能する。水熱交換器５で凝集した第１の冷媒は、膨張装置４で減圧されることで一部蒸発し、その気化熱で低温低圧の液体に変化する。その後、低温低圧の液体となった第１の冷媒は、第１の熱交換器２において、ファン３から送風された空気と熱交換して蒸発し、低温低圧の気体に変化する。この際、第１の熱交換器２は、第１の冷媒を蒸発させる蒸発器として機能する。 When the refrigeration cycle device 100 performs heating operation, the water heat exchanger 5 heats the water flowing through the second refrigerant pipe 20 . In the case of heating operation, the first refrigerant flows through the compressor 1, the water heat exchanger 5, the expansion device 4, the first heat exchanger 2, and the accumulator 6 in this order. The first refrigerant, which has become a high-temperature, high-pressure gas in the compressor 1, exchanges heat with water in the water heat exchanger 5, condenses, and changes into a liquid. At this time, the water heat exchanger 5 functions as a condenser that aggregates the first refrigerant. The first refrigerant condensed in the water heat exchanger 5 is partially evaporated by being decompressed by the expansion device 4, and is changed into a low-temperature, low-pressure liquid by the heat of vaporization. Thereafter, the first refrigerant, which has become a low-temperature, low-pressure liquid, exchanges heat with the air blown from the fan 3 in the first heat exchanger 2, evaporates, and changes to a low-temperature, low-pressure gas. At this time, the first heat exchanger 2 functions as an evaporator that evaporates the first refrigerant.

一方、冷凍サイクル装置１００が冷却運転する場合、第２の冷媒管２０を流れる水が冷却される。冷却運転の場合、四方弁７が反転されて、加熱運転の場合と逆向きの冷媒の流れが生じている。したがって、第１の冷媒は、圧縮機１、第１の熱交換器２、膨張装置４、水熱交換器５、アキュムレータ６の順に流れる。この際、水熱交換器５を流れる第１の冷媒は、第２の冷媒管２０を流れる水と熱交換し、第１の冷媒を蒸発させる蒸発器として機能する。また、第１の熱交換器２は、第１の冷媒を凝集させる凝集器として機能する。 On the other hand, when the refrigeration cycle device 100 performs cooling operation, the water flowing through the second refrigerant pipe 20 is cooled. In the case of the cooling operation, the four-way valve 7 is reversed, and the refrigerant flows in the direction opposite to that in the heating operation. Therefore, the first refrigerant flows through compressor 1 , first heat exchanger 2 , expansion device 4 , water heat exchanger 5 and accumulator 6 in this order. At this time, the first refrigerant flowing through the water heat exchanger 5 exchanges heat with the water flowing through the second refrigerant pipe 20 and functions as an evaporator that evaporates the first refrigerant. Also, the first heat exchanger 2 functions as a condenser for condensing the first refrigerant.

以上が冷凍サイクル装置１００の説明である。次に、図２を参照して、水熱交換器５の接続部１５について詳細に説明する。接続部１５は、水熱交換器５における冷媒の出入口である。 The above is the description of the refrigeration cycle device 100 . Next, referring to FIG. 2, the connection portion 15 of the water heat exchanger 5 will be described in detail. The connecting portion 15 is an inlet/outlet of the refrigerant in the water heat exchanger 5 .

図２は、本発明の実施形態に係る水熱交換器５の接続部１５の概略的な断面図である。水熱交換器５は、第１の冷媒と第２の冷媒である水との間で熱交換を行う。そのため、水熱交換器５は、それぞれの冷媒に対応する出入口を備えている。この冷媒の出入口を接続部１５と呼ぶ。図２は、第１の冷媒が流れる第１の冷媒管１０と水熱交換器５との接続部１５の断面図である。なお、第２の冷媒が流れる第２の冷媒管２０と水熱交換器５との接続部の図示は省略する。 FIG. 2 is a schematic cross-sectional view of the connecting portion 15 of the water heat exchanger 5 according to the embodiment of the invention. The water heat exchanger 5 exchanges heat between the first refrigerant and water, which is the second refrigerant. Therefore, the water heat exchanger 5 has inlets and outlets corresponding to the respective refrigerants. This inlet/outlet for the coolant is called a connecting portion 15 . FIG. 2 is a cross-sectional view of a connecting portion 15 between the first refrigerant pipe 10 through which the first refrigerant flows and the water heat exchanger 5. As shown in FIG. Illustration of the connecting portion between the second refrigerant pipe 20 through which the second refrigerant flows and the water heat exchanger 5 is omitted.

接続部１５は、継手９と第１の冷媒管１０とを接続する部位である。例えば、図２に示すように、第１の冷媒管１０が継手９に内嵌めされている場合、継手９と第１の冷媒管１０とが重畳している部分から継手９とカバープレート１４との接続部分までが接続部１５である。この場合、接続部１５の範囲は、継手９の範囲と一致する。なお、接続部１５の範囲は、継手９と重畳していない第１の冷媒管１０の部分を含んでいても良い。また、接続部１５の範囲は、第１の冷媒管１０のカバープレート１４側の端部から継手９とカバープレート１４との接続部分までであっても良い。 The connecting portion 15 is a portion that connects the joint 9 and the first refrigerant pipe 10 . For example, as shown in FIG. 2, when the first refrigerant pipe 10 is internally fitted in the joint 9, the joint 9 and the cover plate 14 are separated from the portion where the joint 9 and the first refrigerant pipe 10 overlap. is a connecting portion 15 up to the connecting portion of . In this case, the extent of the connection 15 coincides with the extent of the joint 9 . The range of the connecting portion 15 may include the portion of the first refrigerant pipe 10 that does not overlap with the joint 9 . Also, the range of the connection portion 15 may be from the end of the first refrigerant pipe 10 on the cover plate 14 side to the connection portion between the joint 9 and the cover plate 14 .

継手９は、カバープレート１４に設けられる。カバープレート１４および継手９は、熱交換プレートと同じくステンレス製である。一方、第１の冷媒管１０は、銅製である。継手９と第１の冷媒管１０とは異種間の金属を接続するろう材１１により接合される。例えば、図２に示すように、第１の冷媒管１０が継手９に内嵌めされる場合、ろう材１１は、継手９および第１の冷媒管１０が重畳した部分で、継手９と第１の冷媒管１０との間に挟み込まれて両者を接合している。 The joint 9 is provided on the cover plate 14 . The cover plate 14 and the joint 9 are made of stainless steel like the heat exchange plate. On the other hand, the first refrigerant pipe 10 is made of copper. The joint 9 and the first refrigerant pipe 10 are joined by a brazing material 11 that connects dissimilar metals. For example, as shown in FIG. 2, when the first refrigerant pipe 10 is internally fitted in the joint 9, the brazing filler metal 11 is placed between the joint 9 and the first refrigerant pipe 10 at the portion where the joint 9 and the first refrigerant pipe 10 overlap. 1 and the refrigerant pipe 10 to join them together.

継手９と第１の冷媒管１０との接合には、銀ろうなどの亜鉛を含むろう材が用いられる。ろう材に含まれる亜鉛は、例えば、水を触媒としてハロゲンと反応する。したがって、水の存在下で、亜鉛を含むろう材とヨードカーボン類を含む冷媒とが接触すると、亜鉛を含むろう材の腐食の原因となる。ろう材の腐食は、冷媒の漏えいの原因となる。また、水を触媒として亜鉛が冷媒を構成するヨウ素などのハロゲン原子と反応することで、冷媒が分解される虞がある。 A brazing material containing zinc, such as silver solder, is used for joining the joint 9 and the first refrigerant pipe 10 . Zinc contained in the brazing filler metal reacts with halogen using, for example, water as a catalyst. Therefore, contact between a brazing filler metal containing zinc and a coolant containing iodocarbons in the presence of water causes corrosion of the brazing filler metal containing zinc. Corrosion of the brazing filler metal causes refrigerant leakage. In addition, zinc reacts with halogen atoms such as iodine constituting the refrigerant using water as a catalyst, and the refrigerant may be decomposed.

また、亜鉛を含むろう材とＣＦ３Ｉを含む冷媒とが接触すると、ろう材に含まれる亜鉛がＣＦ３Ｉのヨウ素原子と反応し、冷媒が分解される虞がある。 Further, when the brazing filler metal containing zinc and the refrigerant containing CF3I come into contact with each other, the zinc contained in the brazing filler metal may react with the iodine atoms of CF3I to decompose the refrigerant.

そこで、本実施形態に係る水熱交換器５は、接続部１５に保護部１２を備えている。保護部１２は、接続部１５、つまり第１の冷媒管１０と継手９とを介して積層された複数の熱交換プレートに流通される冷媒とろう材１１との接触を防ぐよう設けられている。保護部１２は、第１の冷媒の流路上に第１の冷媒の流通を妨げないよう設けられる。 Therefore, the water heat exchanger 5 according to the present embodiment includes the protection portion 12 at the connection portion 15 . The protective portion 12 is provided to prevent contact between the brazing material 11 and the refrigerant flowing through the plurality of laminated heat exchange plates via the connection portion 15 , that is, the first refrigerant pipe 10 and the joint 9 . . The protection part 12 is provided on the flow path of the first coolant so as not to block the flow of the first coolant.

保護部１２は、例えば、継手９と第１の冷媒管１０とがろう材１１により重畳して接続されている部分を覆うように設けられる。すなわち、保護部１２は、継手９の内側、継手９と第１の冷媒管１０の重畳部分の内側、第１の冷媒管１０の内側に連続して設けられる。また、保護部１２は、第１の冷媒管１０のカバープレート１４側の先端部分と継手９との間に生じた隙間に設けられてもよい。 The protective portion 12 is provided, for example, so as to cover a portion where the joint 9 and the first refrigerant pipe 10 are overlapped and connected by the brazing material 11 . That is, the protective portion 12 is continuously provided inside the joint 9 , inside the overlapping portion of the joint 9 and the first refrigerant pipe 10 , and inside the first refrigerant pipe 10 . Moreover, the protective portion 12 may be provided in a gap formed between the tip portion of the first refrigerant pipe 10 on the cover plate 14 side and the joint 9 .

なお、保護部１２は、カバープレート１４よりも熱交換プレート側には設けられていないことが好ましい。 In addition, it is preferable that the protection portion 12 is not provided closer to the heat exchange plate than the cover plate 14 .

保護部１２は、例えば、ビニル樹脂を含むビニル化合物を重合して得られる高分子化合物で構成される。ビニル樹脂には、示性式ＣＨ２ＣＨ（ＯＨ）で示されるビニルアルコール基を有する合成樹脂が含まれる。また、ビニル樹脂には、例えば、ポリエチレン、ポリ塩化ビニル、ポリスチレンなどの合成樹脂が含まれる。ビニル樹脂は、ポリビニルアルコール（Polyvinyl alcohol：ＰＶＯＨ）やポリ塩化ビニル（Polyvinyl Chloride：ＰＶＣ）などの１種類の単量体が重合したポリマーであってもよいし、エチレンビニルアルコール共重合体（Ethylene Vinylalcohol copolymer：ＥＶＯＨ）などの２種類以上の化合物が結合した単量体が重合したポリマーであってもよい。 The protective portion 12 is composed of, for example, a polymer compound obtained by polymerizing a vinyl compound containing a vinyl resin. Vinyl resins include synthetic resins having a vinyl alcohol group represented by the rational formula CH2CH(OH). Vinyl resins include, for example, synthetic resins such as polyethylene, polyvinyl chloride, and polystyrene. The vinyl resin may be a polymer obtained by polymerizing one type of monomer such as polyvinyl alcohol (PVOH) or polyvinyl chloride (PVC), or may be an ethylene vinyl alcohol copolymer. It may be a polymer obtained by polymerizing monomers to which two or more compounds are bonded, such as copolymer (EVOH).

なお、保護部１２を形成する材料は、ビニル樹脂に限定されない。例えば、保護部１２は、合成ゴム、合成繊維、金属などの材料で形成されてもよい。保護部１２は、冷媒およびろう材と反応せず、ガスバリア性に優れ、冷凍サイクル装置の温度変化により変質せず、冷媒に溶出しない材料であればどのような材料であってもよい。 In addition, the material forming the protective portion 12 is not limited to the vinyl resin. For example, the protective part 12 may be made of a material such as synthetic rubber, synthetic fiber, or metal. The protective portion 12 may be made of any material as long as it does not react with the refrigerant and the brazing filler metal, has excellent gas barrier properties, does not deteriorate due to temperature changes in the refrigeration cycle device, and does not dissolve into the refrigerant.

次に、保護部１２を水熱交換器５に設置する方法を説明する。 Next, a method for installing the protection part 12 in the water heat exchanger 5 will be described.

図３は、本発明の実施形態に係る保護部１２を有する水熱交換器５の製造方法の一例を説明する図である。図３は、ディッピング（dipping）により水熱交換器５に保護部１２を形成する方法を示している。 FIG. 3 is a diagram illustrating an example of a method for manufacturing the water heat exchanger 5 having the protective portion 12 according to the embodiment of the present invention. FIG. 3 shows a method of forming the protective part 12 on the water heat exchanger 5 by dipping.

保護部１２は、保護部１２を形成する材料を含む溶液に保護部１２の形成対象を浸漬する方法、いわゆるディッピングによって形成される。例えば、保護部１２の材料として水溶性のＰＶＯＨを利用する場合、水熱交換器５の一部、即ち、水熱交換器５の接続部１５を有する部分をＰＶＯＨ水溶液Ｌに浸漬することによって、保護部１２が接続部１５に形成される。 The protective portion 12 is formed by a method of immersing the object to be formed of the protective portion 12 in a solution containing a material for forming the protective portion 12, that is, by dipping. For example, when water-soluble PVOH is used as the material of the protection part 12, a part of the water heat exchanger 5, that is, a part of the water heat exchanger 5 having the connecting part 15 is immersed in the PVOH aqueous solution L, A protection portion 12 is formed on the connection portion 15 .

水熱交換器５に接続される第１の冷媒管１０の長さがＰＶＯＨ水溶液Ｌの流入を妨げるほど長い場合、ＰＶＯＨ水溶液Ｌに圧力をかけて第１の冷媒管１０にＰＶＯＨ水溶液Ｌを押し込み、接続部１５にＰＶＯＨ水溶液Ｌを充填することで保護部１２を確実に形成できる。保護部１２の形成が不要な部位は、適宜にマスキングされる。そうすることで、所望の部分にＰＶＯＨ水溶液Ｌを付着させて保護部１２を形成することができる。 When the length of the first refrigerant pipe 10 connected to the water heat exchanger 5 is long enough to prevent the inflow of the PVOH aqueous solution L, pressure is applied to the PVOH aqueous solution L to push the PVOH aqueous solution L into the first refrigerant pipe 10. , the protection portion 12 can be reliably formed by filling the PVOH aqueous solution L in the connection portion 15 . Areas where formation of the protective portion 12 is unnecessary are appropriately masked. By doing so, the protective portion 12 can be formed by adhering the PVOH aqueous solution L to a desired portion.

なお、図３では、ディッピングにより保護部１２を形成する例を示したが、保護部１２の形成方法はディッピングに限定されない。例えば、保護部１２を形成する材料を含む溶液を、保護部１２を設置したい部分に塗布あるいは吹き付けることで、保護部１２を形成してもよい。 Note that FIG. 3 shows an example in which the protective portion 12 is formed by dipping, but the method for forming the protective portion 12 is not limited to dipping. For example, the protective portion 12 may be formed by applying or spraying a solution containing a material for forming the protective portion 12 to a portion where the protective portion 12 is desired to be installed.

また、保護部１２を形成する方法は、液体の材料を用いる方法に限定されない。例えば、シート状の保護部１２を目的の位置に貼り付けて接続部１５の管壁面に接着させることで保護部１２を形成しても良い。また、形状記憶合金や弾性体で形成された保護部１２を折りたたんだ状態で管内部に挿入し、目的の位置で拡張させて、保護部１２を接続部１５の管壁面に突っ張らせて固定しても良い。 Also, the method of forming the protective portion 12 is not limited to the method using a liquid material. For example, the protective portion 12 may be formed by attaching the sheet-like protective portion 12 to a desired position and adhering it to the pipe wall surface of the connecting portion 15 . In addition, the protection part 12 made of a shape memory alloy or an elastic material is folded and inserted into the pipe, expanded at a desired position, and fixed by stretching the protection part 12 against the pipe wall surface of the connection part 15. can be

このように、本実施形態に係る水熱交換器５、および冷凍サイクル装置１００は、水熱交換器５の冷媒の出入口に冷媒とろう材１１との接触を防ぐ保護部１２を有している。また、本実施形態に係る水熱交換器５の製造方法は、水熱交換器５の冷媒の出入口に冷媒とろう材１１との接触を防ぐ保護部１２を形成する。そのため水熱交換器５、水熱交換器５の製造方法、および冷凍サイクル装置１００、冷媒とろう材１１との接触に起因するろう材１１の腐食を防止することができる。これにより、水熱交換器５、水熱交換器５の製造方法、および冷凍サイクル装置１００は、冷媒の漏出を防ぐことができる。また、水熱交換器５、水熱交換器５の製造方法、および冷凍サイクル装置１００は、ろう材１１に含まれる亜鉛と冷媒のハロゲン原子とが反応するのを防ぎ、冷媒の分解を防止することができる。 Thus, the water heat exchanger 5 and the refrigeration cycle device 100 according to the present embodiment have the protection portion 12 at the refrigerant inlet/outlet of the water heat exchanger 5 to prevent contact between the refrigerant and the brazing filler metal 11. . In addition, in the method of manufacturing the water heat exchanger 5 according to the present embodiment, the protective portion 12 is formed at the refrigerant inlet/outlet of the water heat exchanger 5 to prevent contact between the refrigerant and the brazing filler metal 11 . Therefore, corrosion of the brazing filler metal 11 caused by contact between the water heat exchanger 5, the manufacturing method of the water heat exchanger 5, the refrigerating cycle device 100, and the refrigerant and the brazing filler metal 11 can be prevented. As a result, the water heat exchanger 5, the method for manufacturing the water heat exchanger 5, and the refrigeration cycle device 100 can prevent leakage of refrigerant. In addition, the water heat exchanger 5, the method for manufacturing the water heat exchanger 5, and the refrigeration cycle device 100 prevent the zinc contained in the brazing material 11 from reacting with the halogen atoms of the refrigerant, thereby preventing the decomposition of the refrigerant. be able to.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

１００…冷凍サイクル装置、１…圧縮機、２…第１の熱交換器、３…ファン、４…膨張装置、５…第２の熱交換器（水熱交換器）、６…アキュムレータ、７…四方弁、８…ポンプ、９…継手、１０…第１の冷媒管、１１…ろう材、１２…保護部、１４…カバープレート、１５…接続部、２０…第２の冷媒管、Ｌ…ＰＶＯＨ水溶液。
DESCRIPTION OF SYMBOLS 100... Refrigeration cycle apparatus 1... Compressor 2... 1st heat exchanger 3... Fan 4... Expansion device 5... 2nd heat exchanger (water heat exchanger) 6... Accumulator 7... Four-way valve 8 Pump 9 Coupling 10 First refrigerant pipe 11 Brazing material 12 Protection part 14 Cover plate 15 Connection part 20 Second refrigerant pipe L PVOH aqueous solution.

Claims (4)

積層された複数の熱交換プレートと、
前記複数の熱交換プレートを挟み込む一対のカバープレートと、
前記一対のカバープレートの少なくとも一方に設けられる継手と、
前記継手に亜鉛を含むろう材によって接合される冷媒管と、
前記冷媒管および前記継手を介して前記複数の熱交換プレートに流通される、ヨードカーボン類を含む冷媒と前記ろう材との接触を防ぐよう設けられる保護部と、を備える水熱交換器。 a plurality of stacked heat exchange plates;
a pair of cover plates sandwiching the plurality of heat exchange plates;
a joint provided on at least one of the pair of cover plates;
a refrigerant pipe joined to the joint with a brazing material containing zinc ;
A water heat exchanger, comprising: a protective portion provided to prevent contact between the brazing material and refrigerant containing iodocarbons, which flows through the plurality of heat exchange plates through the refrigerant pipes and the joints. 前記保護部は、ビニル樹脂により形成されている請求項１に記載の水熱交換器。 2. The water heat exchanger according to claim 1, wherein said protective portion is made of vinyl resin. 請求項１に記載の水熱交換器の製造方法であって、
ビニル樹脂を含む溶液に前記カバープレートと前記継手との接続部を浸漬して前記保護部を形成する水熱交換器の製造方法。 A method for manufacturing a water heat exchanger according to claim 1,
A method for manufacturing a water heat exchanger, wherein the connecting portion between the cover plate and the joint is immersed in a solution containing a vinyl resin to form the protective portion. 圧縮機と、
膨張装置と、
前記圧縮機、および前記膨張装置と接続し、蒸発器および凝集器の少なくともいずれか一方として機能する請求項１または２に記載の水熱交換器と、を備える冷凍サイクル装置。 a compressor;
an inflator;
3. A refrigeration cycle apparatus comprising: the compressor; and the water heat exchanger according to claim 1 or 2, which is connected to the expansion device and functions as at least one of an evaporator and a condenser.
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