JP6266093B2 - 熱交換器及び空気調和機 - Google Patents
熱交換器及び空気調和機 Download PDFInfo
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- JP6266093B2 JP6266093B2 JP2016512504A JP2016512504A JP6266093B2 JP 6266093 B2 JP6266093 B2 JP 6266093B2 JP 2016512504 A JP2016512504 A JP 2016512504A JP 2016512504 A JP2016512504 A JP 2016512504A JP 6266093 B2 JP6266093 B2 JP 6266093B2
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- refrigerant pipe
- aluminum
- heat exchanger
- copper
- joint
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- 239000003507 refrigerant Substances 0.000 claims description 212
- 229910052782 aluminium Inorganic materials 0.000 claims description 115
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 115
- 239000010410 layer Substances 0.000 claims description 92
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 72
- 229910052802 copper Inorganic materials 0.000 claims description 72
- 239000010949 copper Substances 0.000 claims description 72
- 239000007921 spray Substances 0.000 claims description 42
- 239000000919 ceramic Substances 0.000 claims description 19
- 239000010935 stainless steel Substances 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 7
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 38
- 230000007797 corrosion Effects 0.000 description 38
- 229910052751 metal Inorganic materials 0.000 description 38
- 239000002184 metal Substances 0.000 description 38
- 239000003570 air Substances 0.000 description 33
- 238000005219 brazing Methods 0.000 description 15
- 238000005507 spraying Methods 0.000 description 13
- 239000002826 coolant Substances 0.000 description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 10
- 229910052725 zinc Inorganic materials 0.000 description 10
- 239000011701 zinc Substances 0.000 description 10
- 150000003839 salts Chemical class 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 230000005496 eutectics Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 5
- 238000007751 thermal spraying Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000012080 ambient air Substances 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 3
- 229910001431 copper ion Inorganic materials 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004299 exfoliation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/08—Soldered joints
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/007—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints specially adapted for joining pipes of dissimilar materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
- F16L13/0209—Male-female welded joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/14—Coatings characterised by the materials used by ceramic or vitreous materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/181—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for non-disconnectible pipe joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/185—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for joints with sleeve or socket
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/30—Refrigerant piping for use inside the separate outdoor units
-
- 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
-
- 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
-
- 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
- F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Coating By Spraying Or Casting (AREA)
Description
このため、本発明は、アルミ製冷媒配管と銅製冷媒配管とを接続する接続構造部を従来よりも容易に被覆でき、従来よりも経年劣化を抑制することができる防食構造を有する熱交換器及び空気調和機を得ることができる。
図1は、本発明の実施の形態1に係る空気調和機を示すシステム図である。
本実施の形態1に係る空気調和機200は、圧縮機4、室内熱交換器5、減圧機構である膨張弁6及び室外熱交換器1を備えている。そして、これらの構成要素が冷媒配管で接続され、閉回路である冷凍サイクル回路が構成されている。詳しくは、圧縮機4の吐出口と室内熱交換器5とは、冷媒配管7で接続されている。室内熱交換器5と室外熱交換器1とは冷媒配管8で接続され、該冷媒配管8の途中には膨張弁6が設けられている。室外熱交換器1と圧縮機4の吸入口とは、冷媒配管9で接続されている。また、空気調和機200を構成するこれらの構成要素は、圧縮機4、膨張弁6及び室外熱交換器1が室外機10に収容され、室内熱交換器5が室内機11に収容されている。
ここで、ヘッダー2,3が、本発明の第1冷媒配管に相当する。
ここで、冷媒配管9が、本発明の第2冷媒配管に相当する。
図2に示すように、本実施の形態1に係るACジョイント20は、アルミ製冷媒配管21と銅製冷媒配管22とを共晶接合したものである。さらに、本実施の形態1では、ACジョイント20に、当該ACジョイント20の周囲を覆う溶射層30が形成されている。
例えば図3に示すように、アルミ製冷媒配管21と銅製冷媒配管22との間にステンレス製冷媒配管23を設け、これらをろう付け等によって接続してACジョイント20を構成してもよい。
本実施の形態1に係る溶射層30は、例えば、大気環境下においてアルミニウムよりも貴でない金属を溶射して形成されたものである。ここで、溶射は金属を液状にし、ACジョイント20に噴霧することにより行われる。
金属、又は、金属に溶射、メッキ若しくは塗装膜を施した部品の耐食性を評価するものである。試験方法としては、温度35℃及び相対湿度98%の環境下において、5%の塩化ナトリウム水溶液を部品に噴霧する。
ここで、水溶液中のイオン化傾向では、アルミニウムの方が亜鉛よりも卑となる。しかしながら、大気環境下においては、アルミニウムの表面に酸化皮膜が形成されるため、アルミニウムの方が亜鉛よりも貴となることを付言しておく。
室外熱交換器1の配置構成等、空気調和機200の構成によっては溶射層30の形成範囲で冷媒配管の曲げ加工を行う場合もある。このような場合、溶射層30を次のように構成してもよい。なお、本実施の形態2において、特に記述しない項目については実施の形態1と同様とし、同一の機能や構成については同一の符号を用いて述べることとする。
セラミック等の絶縁物を溶射して形成された溶射層30の場合、次のように溶射層30を構成してもよい。なお、本実施の形態3において、特に記述しない項目については実施の形態1又は実施の形態2と同様とし、同一の機能や構成については同一の符号を用いて述べることとする。
実施の形態1〜実施の形態3においては、アルミ製冷媒配管(本発明の第1冷媒配管)と銅製冷媒配管(本発明の第2冷媒配管)とを接続する接続構造部を溶射層30で被覆することにより、接続構造部での異種金属接合による腐食を防止した。これに限らず、アルミ製冷媒配管(本発明の第1冷媒配管)と銅製冷媒配管(本発明の第2冷媒配管)とを次のように接続し、接続構造部での異種金属接合による腐食を防止してもよい。なお、本実施の形態4において、特に記述しない項目については実施の形態1〜実施の形態2のいずれかと同様とし、同一の機能や構成については同一の符号を用いて述べることとする。
本実施の形態4に係る接続部材100は、図5及び図6に示すように、第1配管102の内側に第2配管104を配置して、これらを接合したものである。ここで、接続部材100が、本発明の接続構造部に相当する。
なお、圧接の他に、図7に示すように第1配管102と第2配管104とを接合してもよい。つまり、第1端部100aに金属からなる配管106を設け、該配管106と第1配管102及び第2配管104とを摩擦圧接してもよい。
Claims (5)
- アルミニウム又はアルミニウム合金で形成された複数のフィンと、
アルミニウム又はアルミニウム合金で形成され、前記フィンの配列方向に沿って配置された複数の伝熱管と、
アルミニウム又はアルミニウム合金で形成され、前記伝熱管に接続された少なくとも1つの第1冷媒配管と、
銅又は銅合金で形成された少なくとも1つの第2冷媒配管と、
ステンレス製冷媒配管と、
前記第1冷媒配管が前記第2冷媒配管よりも上方となるように配置され、前記ステンレス製冷媒配管が、前記第1冷媒配管と接続されているとともに、前記第2冷媒配管と接続されている接続構造部と、
前記接続構造部の少なくとも前記第2冷媒配管と前記ステンレス製冷媒配管との周囲を覆う被覆層と、
を備え、
前記被覆層は、溶射層であり、前記溶射層は、セラミックで構成され、
前記接続構造部と前記溶射層との間に、鉄及びクロムのうちの少なくとも一方を含む中間層が形成されている熱交換器。 - 前記溶射層の厚さLと前記接続構造部の外径Dとの比であるL/Dが0.005より大きい請求項1に記載の熱交換器。
- 圧縮機、室外熱交換器、減圧機構及び室内熱交換器を備え、
前記室外熱交換器及び前記室内熱交換器のうちの少なくとも一方に、請求項1又は請求項2に記載の熱交換器が用いられている空気調和機。 - 銅又は銅合金で形成された前記第2冷媒配管は、前記圧縮機と接続された冷媒配管である請求項3に記載の空気調和機。
- 前記溶射層の形成範囲に曲げ加工が施されている請求項3又は請求項4に記載の空気調和機。
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