WO2022219750A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2022219750A1 WO2022219750A1 PCT/JP2021/015485 JP2021015485W WO2022219750A1 WO 2022219750 A1 WO2022219750 A1 WO 2022219750A1 JP 2021015485 W JP2021015485 W JP 2021015485W WO 2022219750 A1 WO2022219750 A1 WO 2022219750A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coating
- refrigerant pipe
- coating layer
- refrigeration cycle
- refrigerant
- Prior art date
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 34
- 239000003507 refrigerant Substances 0.000 claims abstract description 137
- 239000011248 coating agent Substances 0.000 claims abstract description 90
- 238000000576 coating method Methods 0.000 claims abstract description 90
- 239000011247 coating layer Substances 0.000 claims abstract description 66
- 230000007797 corrosion Effects 0.000 claims abstract description 54
- 238000005260 corrosion Methods 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000005219 brazing Methods 0.000 claims description 40
- 239000003112 inhibitor Substances 0.000 claims description 40
- 239000000945 filler Substances 0.000 abstract description 13
- 239000003795 chemical substances by application Substances 0.000 abstract 4
- 239000003973 paint Substances 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 239000012530 fluid Substances 0.000 description 13
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000005486 sulfidation Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- DHTAIMJOUCYGOL-UHFFFAOYSA-N 2-ethyl-n-(2-ethylhexyl)-n-[(4-methylbenzotriazol-1-yl)methyl]hexan-1-amine Chemical compound C1=CC=C2N(CN(CC(CC)CCCC)CC(CC)CCCC)N=NC2=C1C DHTAIMJOUCYGOL-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- FXRLMCRCYDHQFW-UHFFFAOYSA-N 2,3,3,3-tetrafluoropropene Chemical compound FC(=C)C(F)(F)F FXRLMCRCYDHQFW-UHFFFAOYSA-N 0.000 description 1
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- XIHHEICNLHRJJU-UHFFFAOYSA-N [5-(2-ethylhexyl)-4-methylbenzotriazol-1-yl]methanamine Chemical compound CCCCC(CC)CC1=CC=C2N(CN)N=NC2=C1C XIHHEICNLHRJJU-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- HYZHPAXFOXQGMV-UHFFFAOYSA-N benzotriazol-1-ylmethanamine Chemical compound C1=CC=C2N(CN)N=NC2=C1 HYZHPAXFOXQGMV-UHFFFAOYSA-N 0.000 description 1
- 150000001565 benzotriazoles Chemical class 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 239000002103 nanocoating Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- 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
-
- 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
- F25B41/40—Fluid line 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
Definitions
- the present disclosure relates to a refrigeration cycle device.
- Patent Literature 1 discloses a refrigeration cycle device in which a portion of a refrigerant passage whose temperature rises during brazing is coated with an antirust coating film.
- the refrigerant piping especially the brazed portion, is prone to sulfidation corrosion. If the strength of the piping decreases due to corrosion, refrigerant leakage may occur.
- the present disclosure has been made to solve the above-described problems, and aims to provide a refrigeration cycle device that is advantageous in terms of improving durability in an environment where sulfide gas exists.
- the refrigeration cycle device of the present disclosure includes a first refrigerant pipe, a second refrigerant pipe, a brazing material that joins the end of the first refrigerant pipe to the end of the second refrigerant pipe, and covering the exposed part of the brazing material, A first coating made of a corrosion inhibitor and a first coating layer overlying the outer surface of the first coating.
- FIG. 1 is a diagram showing a refrigeration cycle apparatus according to Embodiment 1;
- FIG. FIG. 2 is a longitudinal sectional view schematically showing part of a refrigerant flow path of a refrigerant circuit of the refrigeration cycle device according to Embodiment 1;
- Figure 1 shows 1,2,3-benzotriazole.
- FIG. 4 shows N,N-bis(2-ethylhexyl)-4-methyl-1H-benzotriazole-1-methanamine.
- FIG. 7 is a longitudinal sectional view schematically showing part of a refrigerant flow path of a refrigerant circuit of a refrigeration cycle device according to Embodiment 2;
- FIG. 1 is a diagram showing a refrigeration cycle apparatus according to Embodiment 1.
- the refrigeration cycle apparatus 1 of the present embodiment includes a compressor 2 that compresses refrigerant, a condenser 3 that condenses the high-pressure refrigerant compressed by the compressor 2, and a condenser 3.
- An expansion valve 4 for decompressing and expanding a high-pressure refrigerant, an evaporator 5 for evaporating the low-pressure refrigerant decompressed by the expansion valve 4, and a refrigerant pipe 6 are provided.
- the compressor 2, the condenser 3, the expansion valve 4, and the evaporator 5 are connected via a refrigerant pipe 6 to form an annular refrigerant circuit.
- the low-pressure refrigerant gas flowing out of the evaporator 5 is sucked into the compressor 2 and circulates through the refrigerant circuit again.
- the refrigerant in the present disclosure is not particularly limited, and may be, for example, carbon dioxide, ammonia, propane, isobutane, freon such as HFC, HFO-1123, or HFO-1234yf.
- the condenser 3 corresponds to a heat exchanger that exchanges heat between the high-pressure refrigerant discharged from the compressor 2 and a first fluid having a temperature lower than that of the high-pressure refrigerant.
- the first fluid can be, for example, a gas, such as outdoor or indoor air, or a liquid, such as water or other liquid heat carrier.
- the refrigeration cycle apparatus 1 may include a first fluid actuator (not shown) such as a pump or blower for flowing the first fluid to the condenser 3 .
- the expansion valve 4 decompresses and expands the high-pressure refrigerant into low-pressure refrigerant.
- the expansion valve 4 may have a structure capable of adjusting the degree of opening of the refrigerant passage.
- the low-pressure refrigerant that has passed through the expansion valve 4 is in a gas-liquid two-phase state.
- the evaporator 5 corresponds to a heat exchanger that exchanges heat between the low-pressure refrigerant decompressed by the expansion valve 4 and a second fluid having a higher temperature than the low-pressure refrigerant.
- the refrigerant in the evaporator 5 evaporates by absorbing the heat of the second fluid.
- the second fluid may be, for example, a gas, such as outdoor or indoor air, or a liquid, such as water or other liquid heat carrier.
- the refrigeration cycle apparatus 1 may include a second fluid actuator (not shown) such as a blower or pump for flowing the second fluid to the evaporator 5 .
- the refrigeration cycle device 1 may be used for the purpose of heating the first fluid with the condenser 3 and may be used for the purpose of cooling the second fluid with the evaporator 5 .
- the refrigerating cycle device 1 may be used in, for example, a cooling device, a heating device, a dehumidifying device, an air conditioning device, a hot water supply device, and the like.
- FIG. 2 is a longitudinal sectional view schematically showing part of the refrigerant flow path of the refrigerant circuit of the refrigeration cycle device 1 according to Embodiment 1.
- the refrigeration cycle device 1 includes a first refrigerant pipe 7 , a second refrigerant pipe 8 , and an end portion 7 a of the first refrigerant pipe 7 joined to an end portion 8 a of the second refrigerant pipe 8 .
- FIG. 2 corresponds to a diagram cut along a plane including the central axis of the first refrigerant pipe 7 and the central axis of the second refrigerant pipe 8 .
- the first refrigerant pipe 7 and the second refrigerant pipe 8 may constitute any part of the refrigerant circuit.
- the first refrigerant pipe 7 and the second refrigerant pipe 8 may constitute part of the condenser 3 or part of the evaporator 5 .
- the heat exchanger constituting the condenser 3 or the evaporator 5 has a hairpin-shaped pipe and a U-shaped pipe joint
- either the first refrigerant pipe 7 or the second refrigerant pipe 8 Either one of the first refrigerant pipe 7 and the second refrigerant pipe 8 may correspond to a U-shaped pipe joint.
- the first refrigerant pipe 7 and the second refrigerant pipe 8 may constitute a connecting portion between the refrigerant pipe 6 and the compressor 2 , the condenser 3 , the expansion valve 4 , or the evaporator 5 .
- Each of the first refrigerant pipe 7 and the second refrigerant pipe 8 is made of metal.
- Each of the first refrigerant pipe 7 and the second refrigerant pipe 8 may be made of copper or a copper alloy, for example.
- the end portion 7a of the first refrigerant pipe 7 is joined to the end portion 8a of the second refrigerant pipe 8 by brazing using a brazing filler metal 9 .
- the brazing material 9 may be, for example, one having a melting point of 450°C or higher, which is used in hard brazing.
- the end portion 7a of the first refrigerant pipe 7 is positioned inside the end portion 8a of the second refrigerant pipe 8.
- the outer diameter of the end portion 7a of the first refrigerant pipe 7 is equal to or less than the inner diameter of the end portion 8a of the second refrigerant pipe 8 .
- the brazing material 9 is filled between the outer peripheral surface of the end portion 7 a of the first refrigerant pipe 7 and the inner peripheral surface of the end portion 8 a of the second refrigerant pipe 8 .
- the portion where the end portion 7a of the first refrigerant pipe 7 is positioned inside the end portion 8a of the second refrigerant pipe 8 is referred to as an "overlapping portion 14".
- the exposed portion 9a is a portion of the brazing filler metal 9 that is exposed from the opening of the end portion 8a of the second refrigerant pipe 8 .
- the exposed portion 9a has a surface perpendicular to the central axis of the second refrigerant pipe 8 at the terminal position of the end portion 8a.
- the exposed portion 9a is not limited to such an example, and may protrude out of the second refrigerant pipe 8 from the opening of the end portion 8a, for example.
- the exposed portion 9 a may have a surface that is inclined with respect to the central axis of the second refrigerant pipe 8 .
- the first coating 10 formed on the surface of the exposed portion 9a of the brazing material 9 is made of a corrosion inhibitor.
- the first film 10 has the effect of protecting the surface of the exposed portion 9a of the brazing filler metal 9 .
- a corrosion inhibitor is a substance that inhibits corrosion of metal forming the first refrigerant pipe 7 , the second refrigerant pipe 8 , and the brazing filler metal 9 .
- Corrosion inhibitors in the present disclosure are also referred to as metal deactivators or rust inhibitors.
- the corrosion inhibitor in the present disclosure may be a benzotriazole-based compound.
- Benzotriazole compounds are particularly highly reactive with copper. Therefore, when the first refrigerant pipe 7 and the second refrigerant pipe 8 are made of copper or a copper alloy, a particularly excellent corrosion inhibiting effect can be obtained.
- benzotriazole-based compounds include, for example, 1,2,3-benzotriazole shown in FIG. 3, or N,N-bis(2-ethylhexyl)-4-methyl-1H-benzotriazole shown in FIG. Particular preference is given to using -1-methanamine.
- the corrosion inhibitor in the present disclosure is not limited to the above examples, and may be, for example, a tolyltriazole-based compound or a merkatobenzothiazole-based compound.
- the first coating 10 may correspond to a molecular coating composed of molecules in which the metal forming the first refrigerant pipe 7, the second refrigerant pipe 8, or the brazing filler metal 9 is combined with a corrosion inhibitor.
- the first coating layer 11 is a layer formed by coating the surface of the first film 10 with paint.
- the thickness of the first coating layer 11 is thicker than the thickness of the first coating 10 .
- the paint of the first coating layer 11 may be, for example, an antirust paint such as an epoxy resin paint, a tar epoxy resin paint, an acrylic resin paint, or an alkylsilicate resin paint.
- the refrigeration cycle device 1 may be used in an environment where sulfide gas such as hydrogen sulfide or sulfur dioxide exists in the air.
- sulfide gas such as hydrogen sulfide or sulfur dioxide exists in the air.
- the brazed portion of the refrigerant pipe in particular, is susceptible to sulfidation corrosion.
- the brazed portion by the brazing material 9 can reliably prevent sulfidation corrosion.
- the first coating 10 has the effect of protecting the brazing filler metal 9 from sulfide gas.
- the first film 10 prevents the brazing filler metal 9 from coming into contact with the sulfide gas, so that the sulfurization corrosion of the brazing filler metal 9 can be reliably prevented.
- the first coating layer 11 has a function of protecting the first coating 10 . By covering the first coating 10 with the first coating layer 11 thicker than the first coating 10, the first coating 10 can be reliably protected over a long period of time. Since the first coating 10 is thin, if there is no first coating layer 11, the first coating 10 may be partially damaged over time, and the corrosion inhibiting effect may gradually decrease.
- the sulfidation corrosion of the brazed portion by the brazing material 9 can be reliably prevented for a long period of time. can be prevented. Therefore, the durability of the refrigerating cycle device 1 is improved, the occurrence of refrigerant leakage can be reliably prevented for a long period of time, and the life of the refrigerating cycle device 1 can be extended.
- the first coating layer 11 is preferably made of paint to which a corrosion inhibitor is added. If the first coating layer 11 does not contain a corrosion inhibitor, the thickness of the first coating 10 may decrease or the first coating 10 may be partially damaged due to deterioration over time. On the other hand, if the first coating layer 11 made of a paint to which a corrosion inhibitor is added is provided, the corrosion inhibitor in the first coating layer 11 migrates to the first coating 10, The first coating 10 can be regenerated before the first coating 10 deteriorates over time. Therefore, sulfidation corrosion of the brazed portion by the brazing filler metal 9 can be reliably prevented for a longer period of time. When a corrosion inhibitor is added to the paint, its concentration is preferably 0.1 wt % to 5 wt %, for example.
- the corrosion inhibitor for the first coating layer 11 is preferably the same substance as the corrosion inhibitor for the first coating 10 .
- the corrosion inhibitor of the first coating 10 is 1,2,3-benzotriazole
- the corrosion inhibitor of the first coating layer 11 is also preferably 1,2,3-benzotriazole.
- the corrosion inhibitor for coating 10 is N,N-bis(2-ethylhexyl)-4-methyl-1H-benzotriazole-1-methanamine
- the corrosion inhibitor for first coating layer 11 is also N,N-bis(2-ethylhexyl)-4-methyl-1H-benzotriazole-1-methanamine. (2-Ethylhexyl)-4-methyl-1H-benzotriazole-1-methanamine is preferred. By doing so, the regeneration of the first coating 10 can be further promoted.
- the corrosion inhibitor for the first coating layer 11 may be a substance different from the corrosion inhibitor for the first coating 10 .
- the corrosion inhibitor in the first coating 10 is 1,2,3-benzotriazole and the corrosion inhibitor in the first coating layer 11 is N,N-bis(2-ethylhexyl)-4-methyl-1H- It may be benzotriazole-1-methanamine and vice versa.
- the refrigeration cycle device 1 in the present embodiment further includes a second coating 12 that covers the outer surface of the first refrigerant pipe 7 and the outer surface of the second refrigerant pipe 8 .
- the second coating 12 is made of a corrosion inhibitor. By providing the second coating 12, corrosion of the first refrigerant pipe 7 and the second refrigerant pipe 8 can be prevented more reliably.
- the second coating 12 may have the same configuration as the first coating 10 .
- the corrosion inhibitor for second coating 12 may be the same material as the corrosion inhibitor for first coating 10 .
- the second coating 12 may be formed together with the first coating 10 . Since the second coating 12 is thin, the second coating 12 does not interfere with heat exchange between the outer surfaces of the first refrigerant pipe 7 and the second refrigerant pipe 8 and the fluid. Therefore, even when the second coating 12 is provided, the heat exchange efficiency of the first refrigerant pipe 7 and the second refrigerant pipe 8 can be prevented from being lowered.
- aqueous solution of a corrosion inhibitor dissolved in pure water is prepared.
- concentration of the aqueous solution for example, 0.25 wt % is preferable in the case of 1,2,3-benzotriazole, and 1,2,3-benzotriazole, N,N-bis(2-ethylhexyl)-4-methyl 1 wt% is preferred in the case of -1H-benzotriazole-1-methanamine.
- first refrigerant pipe 7 and the second refrigerant pipe 8 brazed with the brazing material 9 are immersed in the aqueous solution.
- the immersion time may be, for example, about 2 to 3 minutes.
- the first coating 10 and the second coating 12 are formed.
- the first coating 10 and the second coating 12 may deteriorate when exposed to high temperatures during brazing. In contrast, by forming the first coating 10 and the second coating 12 after brazing, it is possible to reliably prevent the first coating 10 and the second coating 12 from deteriorating due to heat.
- the method of forming the first coating 10 and the second coating 12 is not limited to the above examples.
- a method of immersing the first refrigerant pipe 7 and the second refrigerant pipe 8 brazed with the brazing material 9 in a solution of a corrosion inhibitor dissolved in an oily solvent may be used.
- the refrigerating cycle device 1 in the present embodiment further includes a second coating layer 13 that partially covers the outer surface of the second coating 12 .
- the second coating layer 13 is a layer formed by coating the surface of the second coating 12 with a coating.
- the paint for the second coating layer 13 may be the same as the paint for the first coating layer 11 .
- One end of the second coating layer 13 is connected to one end of the first coating layer 11 .
- the second coating layer 13 may be formed together with the first coating layer 11 .
- the second coating layer 13 has the function of protecting the second coating 12 .
- the second coating layer 13 By covering the second coating layer 12 with the second coating layer 13 that is thicker than the second coating 12, the second coating 12 can be reliably protected over a long period of time.
- the area covered with the second coating layer 13 has lower heat exchange efficiency than the area not covered with the coating layer.
- the second coating layer 13 covers only a partial range of the outer surface of the second coating 12 .
- the remaining area of the outer surface of the second coating 12 is exposed without being covered with the paint layer. In this way, by providing the second coating layer 13 only on a partial range of the outer surface of the second coating 12, the heat exchange efficiency of the first refrigerant pipe 7 and the second refrigerant pipe 8 by the second coating layer 13 can certainly reduce the decrease in
- the second coating layer 13 covers the second coating 12 on the outer surface of the second refrigerant pipe 8 at the overlapping portion 14 .
- the second coating layer 13 does not cover the second coating 12 on the outer surface of the first refrigerant pipe 7 . That is, the second coating 12 on the outer surface of the first refrigerant pipe 7 is exposed without being covered with the coating layer. With such a configuration, it is possible to reliably prevent a decrease in the heat exchange efficiency of the first refrigerant pipe 7 .
- the second coating layer 13 does not cover the area of the second coating 12 on the outer surface of the second refrigerant pipe 8 excluding the overlapping portion 14 . That is, of the second coating 12 on the outer surface of the second refrigerant pipe 8, the area of the second coating 12 excluding the overlapping portion 14 is exposed without being covered with the coating layer. With such a configuration, it is possible to reliably prevent deterioration in the heat exchange efficiency of the second refrigerant pipe 8 .
- the second coating layer 13 is preferably made of paint to which a corrosion inhibitor is added. If a second coating layer 13 made of a paint with added corrosion inhibitors is provided, the corrosion inhibitors in the second coating layer 13 are transferred to the second coating 12 covered by the second coating layer 13. By transferring, the second coating 12 can be regenerated before the second coating 12 deteriorates over time. Therefore, sulfidation corrosion of the brazed portion by the brazing filler metal 9 can be reliably prevented for a longer period of time.
- the corrosion inhibitor for the second coating layer 13 is preferably the same material as the corrosion inhibitor for the second coating 12 .
- FIG. 5 is a longitudinal sectional view schematically showing part of the refrigerant flow path of the refrigerant circuit of the refrigeration cycle device 1 according to Embodiment 2. As shown in FIG.
- the refrigeration cycle device 1 includes a first refrigerant pipe 7 , a second refrigerant pipe 8 , and an end portion 7 a of the first refrigerant pipe 7 is connected to an end portion of the second refrigerant pipe 8 .
- a brazing material 9 joined to the brazing material 8a, a first coat 10 covering the exposed portion 9a of the brazing material 9, and a first coating layer 11 covering the outer surface of the first coat 10 are provided.
- the refrigerating cycle device 1 according to Embodiment 2 differs from Embodiment 1 in that the second coating layer 13 is not provided. That is, the second coating 12 on the outer surface of the second refrigerant pipe 8 in the overlapping portion 14 is exposed without being covered with the second coating layer 13 .
- the entire second coating 12 on the outer surface of the first refrigerant pipe 7 is exposed without being covered with the coating layer, and the second coating 12 on the outer surface of the second refrigerant pipe 8 is exposed.
- the whole of is exposed without being covered with a layer of paint. Therefore, the heat exchange efficiency of the first refrigerant pipe 7 and the second refrigerant pipe 8 is improved as compared with the first embodiment.
- the first refrigerant pipe 7 and the second refrigerant pipe 8 are less likely to corrode than the brazing filler metal 9 . Therefore, even without a coating layer, only the second coating 12 can reliably suppress corrosion over a long period of time.
- the range of the coating layer that can cause a decrease in the heat exchange efficiency of the first refrigerant pipe 7 and the second refrigerant pipe 8 is limited to the first coating layer 11, which is the minimum necessary range. By doing so, it becomes possible to further increase the heat exchange efficiency of the first refrigerant pipe 7 and the second refrigerant pipe 8 while reliably suppressing corrosion of the brazed portion.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Paints Or Removers (AREA)
Abstract
Description
図1は、実施の形態1による冷凍サイクル装置を示す図である。図1に示すように、本実施の形態の冷凍サイクル装置1は、冷媒を圧縮する圧縮機2と、圧縮機2により圧縮された高圧冷媒を凝縮させる凝縮器3と、凝縮器3を通過した高圧冷媒を減圧及び膨張させる膨張弁4と、膨張弁4により減圧された低圧冷媒を蒸発させる蒸発器5と、冷媒配管6とを備えている。圧縮機2、凝縮器3、膨張弁4、及び蒸発器5は、冷媒配管6を介して接続されることで、環状の冷媒回路を形成している。蒸発器5から流出する低圧冷媒ガスは、圧縮機2に吸入され、再び冷媒回路を循環する。
次に、図5を参照して、実施の形態2について説明するが、前述した実施の形態1との相違点を中心に説明し、共通する説明を簡略化または省略する。また、前述した要素と共通または対応する要素には、同一の符号を付す。図5は、実施の形態2による冷凍サイクル装置1が有する冷媒回路の冷媒流路の一部を模式的に示す縦断面図である。
Claims (9)
- 第一冷媒管と、
第二冷媒管と、
前記第一冷媒管の端部を前記第二冷媒管の端部に接合したろう材と、
前記ろう材の露出部を覆い、腐食抑制剤で作られた第一被膜と、
前記第一被膜の外面を覆う第一塗装層と、
を備える冷凍サイクル装置。 - 前記第一塗装層は、腐食抑制剤が添加された塗料で作られている請求項1に記載の冷凍サイクル装置。
- 前記第一塗装層の前記腐食抑制剤は、前記第一被膜の前記腐食抑制剤と同じ物質である請求項2に記載の冷凍サイクル装置。
- 前記第一冷媒管の外面及び前記第二冷媒管の外面を覆い、腐食抑制剤で作られた第二被膜をさらに備える請求項1から請求項3のいずれか一項に記載の冷凍サイクル装置。
- 前記第二被膜の外面のうちの一部の範囲を覆う第二塗装層をさらに備える請求項4に記載の冷凍サイクル装置。
- 前記第二塗装層は、腐食抑制剤が添加された塗料で作られている請求項5に記載の冷凍サイクル装置。
- 前記第一冷媒管の前記端部が前記第二冷媒管の前記端部の内側に位置する重なり部分をさらに備え、
前記第二塗装層は、前記重なり部分における前記第二冷媒管の外面の前記第二被膜を覆い、
前記第一冷媒管の外面の前記第二被膜は、塗装層で覆われていない請求項5または請求項6に記載の冷凍サイクル装置。 - 前記第二冷媒管の外面の前記第二被膜のうち、前記重なり部分を除いた範囲の前記第二被膜は、塗装層で覆われていない請求項7に記載の冷凍サイクル装置。
- 前記第一冷媒管の外面及び前記第二冷媒管の外面は、塗装層で覆われていない請求項1から請求項4のいずれか一項に記載の冷凍サイクル装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180094044.3A CN116888412A (zh) | 2021-04-14 | 2021-04-14 | 制冷循环装置 |
PCT/JP2021/015485 WO2022219750A1 (ja) | 2021-04-14 | 2021-04-14 | 冷凍サイクル装置 |
JP2023514250A JPWO2022219750A1 (ja) | 2021-04-14 | 2021-04-14 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/015485 WO2022219750A1 (ja) | 2021-04-14 | 2021-04-14 | 冷凍サイクル装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022219750A1 true WO2022219750A1 (ja) | 2022-10-20 |
Family
ID=83640255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/015485 WO2022219750A1 (ja) | 2021-04-14 | 2021-04-14 | 冷凍サイクル装置 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPWO2022219750A1 (ja) |
CN (1) | CN116888412A (ja) |
WO (1) | WO2022219750A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004360069A (ja) * | 2003-05-13 | 2004-12-24 | Hoshizaki Electric Co Ltd | 熱交換機構用の腐食防止剤 |
JP2007161893A (ja) * | 2005-12-14 | 2007-06-28 | Jfe Engineering Kk | 蓄熱剤、熱輸送媒体、蓄熱剤用融点調整剤、蓄熱剤用過冷却防止剤、蓄熱剤または熱輸送媒体の主剤の製造方法及び塩化トリnブチルnペンチルアンモニウム水和物 |
JP2011202723A (ja) * | 2010-03-25 | 2011-10-13 | Panasonic Corp | アルミニウム製チューブの接続構造およびそれを具備した熱交換器 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008202813A (ja) * | 2007-02-16 | 2008-09-04 | Mitsubishi Electric Corp | 冷凍サイクル装置およびその製造方法 |
JP6041014B1 (ja) * | 2015-05-26 | 2016-12-07 | ダイキン工業株式会社 | 冷凍装置の蒸発器の製造方法 |
-
2021
- 2021-04-14 CN CN202180094044.3A patent/CN116888412A/zh active Pending
- 2021-04-14 WO PCT/JP2021/015485 patent/WO2022219750A1/ja active Application Filing
- 2021-04-14 JP JP2023514250A patent/JPWO2022219750A1/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004360069A (ja) * | 2003-05-13 | 2004-12-24 | Hoshizaki Electric Co Ltd | 熱交換機構用の腐食防止剤 |
JP2007161893A (ja) * | 2005-12-14 | 2007-06-28 | Jfe Engineering Kk | 蓄熱剤、熱輸送媒体、蓄熱剤用融点調整剤、蓄熱剤用過冷却防止剤、蓄熱剤または熱輸送媒体の主剤の製造方法及び塩化トリnブチルnペンチルアンモニウム水和物 |
JP2011202723A (ja) * | 2010-03-25 | 2011-10-13 | Panasonic Corp | アルミニウム製チューブの接続構造およびそれを具備した熱交換器 |
Also Published As
Publication number | Publication date |
---|---|
CN116888412A (zh) | 2023-10-13 |
JPWO2022219750A1 (ja) | 2022-10-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6857815B2 (ja) | 冷凍サイクル装置 | |
JP6266093B2 (ja) | 熱交換器及び空気調和機 | |
CN102589056B (zh) | 空调的制冷剂管连接结构 | |
CN104704311A (zh) | 双管式换热器和制冷循环装置 | |
JP2017137961A (ja) | 四方弁およびこれを備えた冷凍サイクル装置 | |
JP2008202813A (ja) | 冷凍サイクル装置およびその製造方法 | |
WO2022219750A1 (ja) | 冷凍サイクル装置 | |
US20040200603A1 (en) | Aluminum heat exchanger | |
JP2008025902A (ja) | 熱交換器および熱交換器の製造方法 | |
JP4615422B2 (ja) | 伝熱管、給湯用熱交換器およびヒートポンプ給湯器 | |
CN104236178A (zh) | 制冷剂分流器及制冷循环装置 | |
US10627127B2 (en) | Air conditioner in which a flammable refrigerant flows | |
JP6643627B2 (ja) | 熱生成ユニット | |
JP2016099037A (ja) | 冷凍サイクル装置の熱交換器 | |
JP2008164254A (ja) | 冷媒配管構造 | |
JP4460941B2 (ja) | 腐食防止機能を備える熱交換機構 | |
KR101002027B1 (ko) | 석션파이프 연결 어셈블리 및 그의 제조방법 | |
JP6865809B2 (ja) | 空気調和機 | |
JP2007093035A (ja) | アルミニウムアキュームレータの溶接構造および溶接方法ならびに熱交換器 | |
CN103998873A (zh) | 空气调节机 | |
KR100503486B1 (ko) | 냉동기의 냉매파이프 연결구조 및 그 연결방법 | |
JP3966260B2 (ja) | ヒートポンプ給湯機 | |
JP3928651B2 (ja) | 受液器ユニットの製造方法 | |
JP2013221697A (ja) | 冷蔵庫 | |
JP7280958B2 (ja) | 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 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21936952 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2023514250 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180094044.3 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202327059997 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2301006497 Country of ref document: TH |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11202306977Y Country of ref document: SG |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21936952 Country of ref document: EP Kind code of ref document: A1 |