WO2020137109A1 - Tuyauterie de fluide figorigène et dispositif de réfrigération - Google Patents

Tuyauterie de fluide figorigène et dispositif de réfrigération Download PDF

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Publication number
WO2020137109A1
WO2020137109A1 PCT/JP2019/040940 JP2019040940W WO2020137109A1 WO 2020137109 A1 WO2020137109 A1 WO 2020137109A1 JP 2019040940 W JP2019040940 W JP 2019040940W WO 2020137109 A1 WO2020137109 A1 WO 2020137109A1
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WIPO (PCT)
Prior art keywords
pipe
refrigerant
copper
refrigerant pipe
stainless steel
Prior art date
Application number
PCT/JP2019/040940
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English (en)
Japanese (ja)
Inventor
旭 大野
潤一 濱舘
佳弘 寺本
あゆみ 小牧
弘毅 安藤
Original Assignee
ダイキン工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2019104589A external-priority patent/JP2020109344A/ja
Application filed by ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Publication of WO2020137109A1 publication Critical patent/WO2020137109A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • 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
    • F16L9/00—Rigid pipes
    • F16L9/22—Pipes composed of a plurality of segments
    • 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
    • F25B31/00—Compressor arrangements
    • 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

Definitions

  • the present disclosure relates to refrigerant piping and refrigeration equipment.
  • Patent Document 1 It is known to use a vibration absorbing material to suppress the vibration of the refrigerant pipe (for example, refer to Patent Document 1).
  • a vibration absorber made of synthetic rubber or the like that is wound around a suspended portion of the refrigerant pipe is attached to a casing to which the compressor is attached.
  • the present disclosure aims to provide a refrigerant pipe and a refrigerating apparatus that can reduce the stress applied to the pipe connecting portion due to vibration without using an additional member.
  • the refrigerant pipe of the present disclosure (1) Refrigerant piping that is connected to component parts that constitute a refrigeration system and in which a refrigerant flows, A first portion made of stainless steel and a second portion made of a material having a Young's modulus smaller than that of stainless steel, It has a plurality of 1st parts, and the 2nd part is arranged between the 1st 1st part and other 1st parts.
  • the refrigerant pipe of the present disclosure includes a first portion made of stainless steel and a second portion made of a material having a Young's modulus smaller than that of stainless steel. Further, it has a plurality of first portions, and the second portion is arranged between one first portion and the other first portion.
  • a part of the refrigerant pipe is a second part made of a material having a Young's modulus smaller than that of stainless steel and therefore a low rigidity, and a second part is formed between the first part and the other first part.
  • the "element component” is a device or a component that constitutes a refrigerating apparatus, and is connected to another device or a component by a refrigerant pipe, and is a compressor, a heat exchanger, an oil separator.
  • a vessel, an accumulator, a receiver, a switching valve, an expansion mechanism, a closing valve, etc. can be illustrated.
  • the element component When the element component has a large weight or is fixed to the casing that houses the element component, the element component may become a fixed end for the refrigerant pipe connected to the element component. In this case, when the refrigerant pipe vibrates, the stress as described above may concentrate on the portion (pipe connection portion) of the refrigerant pipe that is connected to the element parts.
  • stainless steel refers to steel having a chromium (Cr) content of 10.5 wt% or more and a carbon (C) content of 1.2 wt% or less, and stainless steel. Are synonymous.
  • the refrigerant pipe of (1) it is preferable that the refrigerant pipe has a bent portion, and at least a part of the bent portion is the second portion.
  • the bent portion of the refrigerant pipe By forming at least a part of the bent portion of the refrigerant pipe as the second portion having a small Young's modulus, it is possible to effectively suppress the vibration and reduce the stress applied to the pipe connecting portion.
  • a "bent part” means the part where the direction of the pipe axis of piping is bent.
  • the second portion has a bellows structure.
  • the second portion has a bellows structure, it is possible to more effectively suppress the vibration and reduce the stress applied to the pipe connecting portion.
  • the second portion can be made of copper or copper alloy.
  • the second portion made of copper or copper alloy, it is possible to suppress the vibration of the refrigerant pipe and reduce the stress applied to the pipe connecting portion. ..
  • the element component can be a compressor.
  • the vibration of the refrigerant pipe due to the vibration generated during the operation of the compressor can be suppressed to reduce the stress applied to the pipe connecting portion.
  • the refrigeration apparatus of the present disclosure is configured by a plurality of element parts, and the refrigerant pipe according to any one of (1) to (5) is connected to one of the plurality of element parts. There is.
  • a part of the refrigerant pipe connected to the component parts of the refrigerating apparatus is a second portion made of a material having a Young's modulus smaller than that of stainless steel and thus a rigidity, and By arranging the second portion between the first portion and the other first portion, it is possible to suppress the vibration of the refrigerant pipe and reduce the stress applied to the pipe connecting portion. In this case, since the stress is reduced only by the refrigerant pipe without using an additional member for reducing the stress, the number of parts does not increase.
  • FIG. 1 is a schematic configuration diagram of an embodiment of a refrigeration apparatus of the present disclosure. It is a perspective explanatory view of a 1st embodiment of the refrigerant piping of this indication. It is explanatory drawing of the corner part of the refrigerant pipe shown by FIG. It is a perspective explanatory view of 2nd Embodiment of the refrigerant piping of this indication. It is isometric view explanatory drawing of 3rd Embodiment of the refrigerant piping of this indication. It is explanatory drawing of 4th Embodiment of the refrigerant piping of this indication. It is a front explanatory view of an example of a closing valve which is an element device.
  • FIG. 1 is a schematic configuration diagram of an air conditioner A that is a refrigeration apparatus according to an embodiment of the present disclosure.
  • the air conditioner A adjusts the temperature in the air-conditioned room by a vapor compression refrigeration cycle.
  • the air conditioner A includes an indoor unit 1, an outdoor unit 2, and a refrigerant circuit 3 provided between them.
  • the refrigerant circuit 3 compresses the refrigerant to generate a high-temperature and high-pressure gas refrigerant, an indoor heat exchanger 5, an electronic expansion valve 6 that decompresses the refrigerant, an outdoor heat exchanger 7, and these in sequence.
  • the refrigerant pipe 8 to connect is provided.
  • the indoor unit 1 and the outdoor unit 2 are provided with an indoor fan 9 and an outdoor fan 10 for blowing air to the indoor heat exchanger 5 and the outdoor heat exchanger 7, respectively.
  • the compressor 4 compresses the low pressure gas refrigerant and discharges the high pressure gas refrigerant.
  • the compressor 4 has a suction port 4a and a discharge port 4b.
  • the low-pressure gas refrigerant is sucked through the suction port 4a.
  • the high-pressure gas refrigerant is discharged from the discharge port 4b in the direction of arrow D.
  • the accumulator 11 is provided in the refrigerant pipe 8a on the suction side of the compressor 4, and the oil separator 12 is provided in the refrigerant pipe 8b on the discharge side of the compressor 4.
  • the oil separated by the oil separator 12 is returned to the refrigerant pipe 8a on the suction side of the compressor 4 via the oil return pipe 15 in which the valve 14 is arranged.
  • the compressor 4, the indoor heat exchanger 5, the electronic expansion valve 6, the outdoor heat exchanger 7, the accumulator 11, the oil separator 12, and the four-way switching valve, the gas closing valve and the liquid closing valve described later are the air conditioner A. Is a component or a component that constitutes the element, and is an element component connected to another device or component by the refrigerant pipe 8.
  • the refrigerant pipe 8 is provided with a four-way switching valve 13, a gas closing valve 16, and a liquid closing valve 17.
  • the flow of the refrigerant is reversed by switching the four-way switching valve 13, and the refrigerant discharged from the compressor 4 is switched between the outdoor heat exchanger 7 and the indoor heat exchanger 5 to be supplied, and the cooling operation and the heating operation are performed. It is possible to switch.
  • the gas closing valve 16 and the liquid closing valve 17 are for opening or closing the refrigerant passage.
  • the opening and closing are performed manually, for example.
  • the gas closing valve 16 and the liquid closing valve 17 are closed to prevent the refrigerant sealed in the outdoor unit 2 from leaking to the outside when the air conditioner A is installed, for example.
  • the gas closing valve 16 and the liquid closing valve 17 are opened when the air conditioner A is used.
  • the refrigerant flows in the direction shown by the solid line arrow.
  • the high-pressure gas refrigerant discharged from the compressor 4 in the direction of the arrow D passes through the oil separator 12 and the four-way switching valve 13, and then passes through the opened gas closing valve 16 for indoor heat exchange. Enter vessel 5.
  • the high-pressure gas refrigerant radiates heat in the process of becoming high-pressure liquid refrigerant in the indoor heat exchanger 5.
  • the high-pressure liquid refrigerant reaches the electronic expansion valve 6 through the opened liquid closing valve 17 and is decompressed by the electronic expansion valve 6.
  • the depressurized refrigerant reaches the outdoor heat exchanger 7, absorbs heat in the outdoor heat exchanger 7, and becomes a low-pressure gas refrigerant.
  • the low-pressure gas refrigerant is sucked into the compressor 4 via the four-way switching valve 13 and the accumulator 11.
  • the indoor heat exchanger 5 functions as a radiator
  • the outdoor heat exchanger 7 functions as a heat absorber.
  • the flow of the refrigerant is reversed by switching the four-way switching valve 13 as shown by the dotted line, and the refrigerant flows in the direction shown by the dotted arrow.
  • the high pressure gas refrigerant discharged from the compressor 4 in the direction of the arrow D passes through the oil separator 12 and the four-way switching valve 13 and then enters the outdoor heat exchanger 7.
  • the high-pressure gas refrigerant radiates heat in the process of becoming high-pressure liquid refrigerant in the outdoor heat exchanger 7.
  • the high-pressure liquid refrigerant reaches the electronic expansion valve 6 and is depressurized by the electronic expansion valve 6.
  • the depressurized refrigerant reaches the indoor heat exchanger 5 through the opened liquid shutoff valve 17, absorbs heat in the indoor heat exchanger 5, and becomes a low-pressure gas refrigerant.
  • the low-pressure gas refrigerant is sucked into the compressor 4 via the opened gas closing valve 16, the four-way switching valve 13 and the accumulator 11.
  • the indoor heat exchanger 5 functions as a heat absorber
  • the outdoor heat exchanger 7 functions as a radiator.
  • the refrigerant pipe 8 is connected to the component parts of the air conditioner A. Specifically, in the embodiment shown in FIG. 1, for example, one end of the refrigerant pipe 8a is connected to the accumulator 11 and the other end is connected to the compressor 4. In other words, the refrigerant pipe 8a connects the accumulator 11 which is one of the component parts of the air conditioner A and the compressor 4 which is the other component part. Further, one end of the refrigerant pipe 8b is connected to the compressor 4, and the other end is connected to the oil separator 12. In other words, the refrigerant pipe 8b connects the compressor 4 which is one element component of the air conditioner A and the oil separator 12 which is another element component.
  • At least a part of the refrigerant pipe 8 is composed of a first portion made of stainless steel and a second portion made of a material having a Young's modulus smaller than that of stainless steel.
  • all the refrigerant pipes connected to the element parts in the air conditioner A can be configured by the first portion and the second portion, or only some of the refrigerant pipes can be formed by the first portion. It can also be composed of a part and a second part.
  • the Young's modulus (GPa) of stainless steel which is the material of the first part, is about 200 although it varies depending on the type (SUS304, SUS316, etc.), and the rigidity is high.
  • the material of the second portion having a Young's modulus smaller than that of stainless steel is not particularly limited, but, for example, copper, aluminum, copper alloy, aluminum alloy or the like can be used. Of these materials, it is desirable to use copper or a copper alloy because they are easy to process and form.
  • the Young's modulus of copper (oxygen-free copper) and aluminum (pure aluminum) are 117 and 69, respectively, which is smaller than the Young's modulus of stainless steel. Therefore, it has lower rigidity than stainless steel.
  • FIG. 2 is a perspective explanatory view of the refrigerant pipe 8b according to the first embodiment of the present disclosure.
  • the refrigerant pipe 8b connects the compressor 4 and the oil separator 12.
  • One end Ed (lower end in FIG. 2) of the refrigerant pipe 8b is connected to a discharge port (not shown) of the compressor 4, and the other end Eu (upper end in FIG. 2) of the oil separator 12 is connected. It is connected to a connection port (not shown).
  • the refrigerant pipe 8b has four straight pipe parts s1, s2, s3, s4 and three corner parts b1, b2, b3.
  • the corner portion b1 is arranged between the straight pipe portion s1 and the straight pipe portion s2, the corner portion b2 is arranged between the straight pipe portion s2 and the straight pipe portion s3, and the straight pipe portion s3 and the straight pipe portion s4 are arranged.
  • the corner portion b3 is arranged between the two.
  • the bending angles of the three corners b1, b2, b3 are all 90°.
  • the corner portion b1 closest to the compressor 4 is the second portion made of copper, and the remaining straight pipe portions s1, s2, s3, s4 and the two corner portions b2, b3.
  • This is the first part made of stainless steel.
  • the refrigerant pipe 8b has a plurality of first portions, and a second portion is provided between the straight pipe portion s1 which is one first portion and the straight pipe portion s2 which is the other first portion.
  • the corner portion b1 is arranged. As shown in FIG. 3, the corner portion b1 includes a bent portion 20 located at the center and straight pipes 21 located at both ends of the bent portion 20. An expanded diameter portion 21a is formed at the end of each straight pipe 21.
  • the end portions of the straight pipe portion s1 and the straight pipe portion s2 adjacent to the corner portion b1 are inserted into the expanded diameter portion 21a and are connected to the corner portion b1 by brazing or welding. It should be noted that an enlarged diameter portion (not shown) is formed at each end of the straight pipe portion s1 and the straight pipe portion s2 adjacent to the corner portion b1, and the end portion of the corner portion b1 is inserted into this enlarged diameter portion. It is also possible to connect the corner portion b1 to each end of the straight pipe portion s1 and the straight pipe portion s2 by attaching or welding.
  • FIG. 4 is a perspective explanatory view of the refrigerant pipe 8c according to the second embodiment of the present disclosure.
  • the refrigerant pipe 8c connects the compressor 4 and the oil separator 12.
  • One end Ed (lower end in FIG. 4) of the refrigerant pipe 8c is connected to a discharge port (not shown) of the compressor 4, and the other end Eu (upper end in FIG. 4) of the oil separator 12 is connected. It is connected to a connection port (not shown).
  • the refrigerant pipe 8c differs from the refrigerant pipe 8b shown in FIG. 2 in that the refrigerant pipe 8b has three corner portions, whereas the refrigerant pipe 8c has four corner portions.
  • the refrigerant pipe 8c has five straight pipe parts s1, s2, s3, s4, s5 and four corner parts b1, b2, b3, b4.
  • the corner portion b1 is arranged between the straight pipe portion s1 and the straight pipe portion s2, the corner portion b2 is arranged between the straight pipe portion s2 and the straight pipe portion s3, and the straight pipe portion s3 and the straight pipe portion s4 are arranged.
  • the corner portion b3 is arranged between the straight pipe portion s4 and the straight pipe portion s5.
  • the bending angle of each of the four corner portions b1, b2, b3, b4 is 90°.
  • the corner part b4 closest to the oil separator 12 is the second part made of copper, and the remaining straight pipe parts s1, s2, s3, s4, s4 and the three corner parts b1, b2 and b3 are the first parts made of stainless steel.
  • the refrigerant pipe 8c has a plurality of first portions, and a second portion is provided between the straight pipe portion s4 which is one first portion and the straight pipe portion s5 which is the other first portion.
  • the corner part b4 which is The detailed structure of the corner part b4 is the same as that shown in FIG. 3, and is composed of a bent part located at the center and straight pipes located at both ends of the bent part.
  • FIG. 5 is a perspective explanatory view of the refrigerant pipe 8d according to the third embodiment of the present disclosure.
  • the refrigerant pipe 8d connects the compressor 4 and the oil separator 12.
  • One end Ed (lower end in FIG. 5) of the refrigerant pipe 8d is connected to a discharge port (not shown) of the compressor 4, and the other end Eu (upper end in FIG. 5) of the oil separator 12 is connected. It is connected to a connection port (not shown).
  • the refrigerant pipe 8d has four straight pipe parts s1, s2, s3, s4 and three corner parts b1, b2, b3.
  • the refrigerant pipe 8d is different from the refrigerant pipe 8b shown in FIG. 2 in that in the refrigerant pipe 8b, one corner portion b1 of the three corner portions is the second portion, and the remaining portion is the first portion.
  • one straight pipe portion s3 of the four straight pipe portions is the second portion, and the remaining portion is the first portion.
  • the refrigerant pipe 8d has a plurality of first portions and is a second portion between a corner portion b2 which is one first portion and another corner portion b3 which is another first portion.
  • the straight pipe part s3 is arranged.
  • the straight pipe portion s3 that is the second portion of the refrigerant pipe 8d has a bellows structure 30. By providing the second portion with the bellows structure 30, it is possible to more effectively suppress vibration and reduce the stress applied to the pipe connecting portion.
  • Extending diameter part 31 is formed at the end of straight pipe part s3.
  • the ends of the corner portion b2 and the corner portion b3 adjacent to the straight pipe portion s3 are inserted into the expanded diameter portion 31 and connected to the straight pipe portion s3 by brazing, welding, or the like.
  • an enlarged diameter portion (not shown) is formed at each end of the bent portion b2 and the bent portion b3 adjacent to the straight pipe portion s3, and the end portion of the straight pipe portion s3 is inserted into this enlarged diameter portion.
  • the straight pipe part s3 can also be connected to each end of the bent part b2 and the bent part b3 by attaching or welding.
  • FIG. 6 is a perspective explanatory view of the refrigerant pipe 8e according to the fourth embodiment of the present disclosure.
  • the refrigerant pipe 8e includes a copper connecting end portion 42 connected to a copper connecting pipe 41 that is a part of the element component 40, and a remaining portion 43 connected to the connecting end portion 42.
  • the remaining portion 43 is composed of a first portion made of stainless steel and a second portion made of copper. Of the remaining portion 43, the portion connected to the connection end portion 42 is made of stainless steel.
  • the connection end portion 42 has the form of a joint, and the one end 42 a is inserted into the expanded diameter portion 41 a formed in the connection pipe 41.
  • connection pipe 41 it is also possible to use a connection port formed of a flange-like or flange-like short cylindrical body provided at the periphery of the opening (not shown) of the element component 40. This connection port also constitutes a part of the element parts.
  • the refrigerant pipe and the element parts are made of the same copper, they can be easily connected by welding such as brazing.
  • welding such as brazing
  • strict temperature control and flux removal management are required to prevent sensitization of stainless steel, making connection more difficult than connecting copper parts.
  • the connection end portion 42 made of a copper joint at the end portion of the refrigerant pipe 8e by providing the connection end portion 42 made of a copper joint at the end portion of the refrigerant pipe 8e, the vibration of the refrigerant pipe 8e is suppressed and the connection between the refrigerant pipe 8e and the element component 40 is brazed. It can be easily performed by a conventional method such as.
  • the connection between the remaining portion 43 and the connection end portion 42 can be performed by brazing in a furnace in which the temperature control described above is relatively easy.
  • the gas shutoff valve 16 shown in FIGS. 7 and 8 is an example of the gas shutoff valve of the outdoor unit 2 including the compressor 4 having a relatively small output (for example, 6 HP or less).
  • the gas shutoff valve 16 and the liquid shutoff valve 17 are also component parts in the present disclosure.
  • the refrigerant pipe of the present disclosure like the refrigerant pipes according to the first to third embodiments, includes the compressor 4, which is an element component arranged in the outdoor unit 2 that constitutes the refrigeration apparatus, and the outdoor unit 2 as well.
  • the gas shutoff valve 16 has a service port 50 in the upper portion when arranged in the outdoor unit 2, and has a connecting pipe connecting portion 51 to which a refrigerant pipe described later is connected in the lower portion.
  • the connecting pipe connecting portion 51 includes a flare nut 52.
  • the gas closing valve 16 has a closing valve lid 53 that covers a valve rod (not shown) that opens and closes the closing valve on the front side (side facing the outside of the machine), and the four-way switching valve 13 on the rear side.
  • FIG. 9 is an explanatory diagram of the refrigerant pipe 8f according to the fifth embodiment of the present disclosure.
  • the refrigerant pipe 8f is an example of a pipe connected to the connecting pipe connecting portion 51 of the gas shutoff valve 16 of the outdoor unit 2 including the compressor 4 having a relatively small output (for example, 6 HP or less).
  • the pipe 60 closest to the gas shutoff valve 16 is made of stainless steel, and one end (the end portion on the gas shutoff valve 16 side) of which is flared to increase its diameter.
  • the flared end portion is connected to the end portion (not shown) of the connecting pipe connecting portion 51 of the gas shutoff valve 16 by the flare nut 52.
  • the other end of the pipe 60 is flared.
  • the other end of the pipe 60 is connected to one end (upper end portion in FIG.
  • a flare joint 62 made of brass which is a copper alloy.
  • One end of the pipe 61 is flared and is connected to the flare joint 62.
  • the other end of the pipe 61 is inserted into the expanded diameter portion 63a formed at the end of one straight pipe portion 63 of the copper corner portion b5 and connected to the corner portion b5 by brazing, welding, or the like.
  • An enlarged diameter portion 64a is also formed at the end of the other straight pipe portion 64 of the corner portion b5, and one end of a copper pipe 65 connected to the corner portion b5 is inserted into the enlarged diameter portion 64a, It is connected to the corner portion b5 by brazing or welding.
  • the other end of the pipe 65 (the end opposite to the side connected to the corner b5) is flared.
  • the other end of the pipe 65 is connected to one end of a stainless pipe 66 through a flare joint 67 made of a brass which is a copper alloy.
  • One end of the pipe 66 is flared and is connected to the flare joint 67.
  • a flare joint 62 made of brass, which is the second portion, a pipe 61 made of copper, a corner portion b5 made of copper, and a pipe made of copper, which are the second portion, are provided between the stainless pipe 60 and the pipe 66 which are the first portions.
  • 65 and a flare joint 67 made of brass are arranged.
  • the straight pipe portion may be made of stainless steel and the bent portion may be made of copper. Vibration can be suppressed by using a copper pipe having a Young's modulus smaller than that of stainless steel. Further, since the copper pipe is highly flexible and easy to bend, it is possible to improve the workability of the piping work on site.
  • FIG. 10 is an explanatory diagram of a refrigerant pipe 8g according to the sixth embodiment of the present disclosure.
  • the refrigerant pipe 8g is an example of a pipe connected to the connecting pipe connecting portion 51 of the gas shutoff valve 16 of the outdoor unit 2 including the compressor 4 having a relatively large output (for example, 8 HP or more).
  • the connecting pipe connection portion 51 of the gas shutoff valve 16 is not provided with the flare nut as shown in FIG. 8, but instead, the connection port 70 made of copper is fixed in advance in the factory by welding or the like.
  • the tip opening 70a of the connection port 70 is closed by a copper cap (not shown).
  • the gas closing valve 16 in FIG. 10 includes a portion indicated by a two-dot chain line.
  • the cap fixed by brazing to the tip opening 70a of the connection port 70 is removed by heating, and one end of the copper connecting pipe 71 is brazed to the tip opening 70a of the connection port 70 with the cap removed. Fix it.
  • the connecting pipe 71 has expanded diameter portions 71a and 71b at both ends, and the end portion of the connection port 70 on the side of the tip opening 70a is inserted into one expanded diameter portion 71a.
  • One end (upper end portion in FIG. 10) of the copper pipe 72 is inserted into the expanded diameter portion 71b at the other end of the connection pipe 71 and is connected by brazing.
  • the other end of the pipe 72 is flared, and is connected to one end (upper end in FIG. 10) of the stainless steel pipe 73 via a flare joint 74.
  • One end of the pipe 73 is flared and is connected to the flare joint 74.
  • the other end of the pipe 73 is flared, and is connected to one end (upper end in FIG. 10) of the copper pipe 75 via a flare joint 76.
  • One end of the pipe 75 is flared and is connected to a flare joint 76.
  • the other end of the pipe 75 is inserted into the expanded diameter portion 77a formed at the end of one straight pipe portion 77 of the copper corner portion b6 adjacent to the pipe 75, and the corner is formed by brazing or welding. It is connected to the part b6.
  • An enlarged diameter portion 78a is also formed at the end of the other straight pipe portion 78 of the corner portion b6, and one end of a copper pipe 79 connected to the corner portion b6 is inserted into the enlarged diameter portion 78a, It is connected to the corner portion b6 by brazing or welding.
  • the other end of the pipe 79 is flared, and is connected to one end of a stainless pipe 80 via a flare joint 81.
  • One end of the pipe 80 is flared and is connected to a flare joint 81.
  • the flare joint 76 made of brass which is the second portion
  • the pipe 75 made of copper the corner portion b6 made of copper
  • the pipe made of copper which are the second portion
  • the flare joint 81 made of brass are arranged.
  • FIG. 7 shows the piping model used for the analysis.
  • This piping model has four straight pipe portions S1, S2, S3, S4 and three corner portions B1, B2, B3, like the refrigerant pipe 8b shown in FIG.
  • the outer diameter of the pipe was 19.1 mm and the wall thickness was 0.8 mm.
  • the length of the straight pipe part was 100 mm. Similar to the embodiment shown in FIG.
  • each of the corner portions B1, B2, B3 is composed of a bent portion located at the center and straight pipes located at both ends of the bent portion.
  • the length of each straight pipe is 25 mm, and the bending radius of the bent portion is 30 mm.
  • the bending angle is 90°.
  • Table 1 shows the physical properties of piping materials.
  • the copper alloy an alloy having copper as a main component and mixed with 0.015 to 0.040 mass% of phosphorus (phosphorus deoxidized copper: C1220) was assumed.
  • the horizontal axis represents the frequency of applied vibration (Hz), and the vertical axis represents the combined stress (equivalent stress) (MPa).
  • the broken line indicates that the pipe material is all stainless steel
  • the thick solid line indicates that the material of the corner portion B1 is replaced with a copper alloy (the remaining material is stainless steel)
  • the thin solid line indicates that the material of the corner portion B2 is copper.
  • the alternate long and short dash line shows the case where the material of the corner B3 is replaced with a copper alloy (the material of the remaining portion is stainless steel).
  • the peak value of the stress generated in the vicinity of the fixed end of the pipe becomes smaller by using a part of the pipe material as the second part made of copper alloy, as compared with the case where all the pipe materials are stainless steel.
  • the peak value of stress is reduced by about 20% as compared with the case where the material of the pipe is all stainless.
  • the refrigerant pipe that connects one element component of the air conditioner to another element component includes the first portion made of stainless steel and the second portion made of copper, which is a material having a Young's modulus smaller than that of stainless steel. It consists of the part and.
  • the vibration of the refrigerant pipe is suppressed and the stress applied to the pipe connecting portion is reduced.
  • the number of parts does not increase.
  • Vibrations acting on the refrigerant pipe include, for example, vibrations caused by the vibrations that the air conditioner receives when the air conditioner is transported, in addition to the vibrations generated when the compressor is operated. In the above-described embodiment, it is possible to reduce the stress applied to the pipe connecting portion due to the vibration generated during such transportation.
  • the refrigerant pipe 8b connecting the compressor 4 and the oil separator 12 is provided with the second portion made of copper, which is a material having a Young's modulus smaller than that of stainless steel. Therefore, it is possible to suppress the vibration and the sound generated by the driving of the compressor 4 from being amplified by the oil separator 12 connected to the compressor 4 by the refrigerant pipe 8b.
  • vibration is suppressed by making a part of the refrigerant pipe a second part made of copper, which is a material having a smaller Young's modulus than stainless steel. Therefore, it is not necessary to complicate the shape of the pipe as in the conventional copper pipe, for example, to form a U-shape to suppress vibration, and it is possible to save space.
  • the bent portion of the pipe a second portion made of copper, it is possible to effectively suppress the vibration of the refrigerant pipe and reduce the stress applied to the pipe connecting portion.
  • the second portion (straight tube portion s3) made of copper has the bellows structure 30. Therefore, it is possible to more effectively suppress the vibration of the refrigerant pipe and reduce the stress applied to the pipe connecting portion.
  • one of the plurality of corner portions and the straight pipe portion forming the refrigerant pipe connected to the element component is the second portion, and the rest is the first portion. Two or more may be the second part.
  • the numbers of corners and straight pipes in the refrigerant pipe can be appropriately changed.
  • the corner portion is composed of the bent portion located at the center and the straight pipes located at both ends of the bent portion, but the corner portion may be formed only by the bent portion. .. Further, in the above-described embodiment, the entire corner portion including the bent portion is used as the second portion. However, when the bending radius of the bent portion is large, only a part of the bent portion is used as the second portion. You can also Similarly, when the corner portion is composed of only the bent portion, the entire bent portion may be the second portion, or only a part of the bent portion may be the second portion.
  • the bending angle of the bent portion is 90°, but this bending angle is set to the space where the refrigerant pipe is arranged, the component parts provided around or near the refrigerant pipe, and other refrigerant pipes.
  • the position can be changed as appropriate in consideration of the position.
  • flare joints are used together with brazing and welding in order to connect the pipes to each other.
  • the connection method can be appropriately selected according to the site environment including workability, and is not limited to the exemplified connection method.
  • the separate type or the separate type air conditioner in which the indoor unit and the outdoor unit are separate bodies has been exemplified, but the air conditioner that is the refrigeration apparatus of the present disclosure is not limited to this.
  • the air conditioner of the type in which the compressor, the condenser, the evaporator, the fan, and the like that are the component parts of the air conditioner are housed in a single casing is also included in the refrigeration apparatus of the present disclosure.
  • FIG. 13 illustrates a first modified example of the present disclosure, in which the ends of the stainless steel pipes 92 and 93 are provided in the expanded diameter portions 90a and 91a of the straight pipe portions 90 and 91 at both ends of the copper corner portion b7, respectively.
  • the portion is inserted and connected to the corner portion b7 by brazing, welding or the like.
  • the same components or elements as those of the embodiment shown in FIG. 9 are designated by the same reference numerals, and the description thereof will be omitted for simplification.
  • FIG. 14 shows a second modified example of the present disclosure, in which the ends of the stainless steel pipes 96 and 97 are respectively provided in the expanded diameter portions 94a and 95a of the straight pipe portions 94 and 95 at both ends of the copper corner portion b8.
  • the portion is inserted and connected to the corner portion 8i by brazing, welding or the like.
  • the same components or elements as those of the embodiment shown in FIG. 10 are designated by the same reference numerals, and the description thereof will be omitted for simplification.
  • the pipe 92, the corner portion b7 and the pipe 93 are assembled as an assembly by brazing in a furnace in which the temperature control described above is relatively easy, and this assembly is predetermined on site. It is also possible to attach it at a location.
  • the pipe 96, the corner part b8, and the pipe 97 are assembled as an assembly by brazing in a furnace in which the temperature control described above is relatively easy, and the assembly is performed on site. It is also possible to attach it at a predetermined location.
  • the bent portion is illustrated as the second portion, but the second portion in the present disclosure is not limited to this, and, for example, in the middle of a stainless pipe (first portion).
  • the branched portion may be made of copper or a copper alloy, and the branched portion may be the second portion.
  • the present disclosure is applied to the refrigerant pipe connected to the gas closing valve of the outdoor unit, but the present disclosure is directed to the refrigerant connected to the liquid closing valve of the outdoor unit. It can also be applied to piping.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

La présente invention concerne une tuyauterie de fluide frigorigène (8) qui est reliée à un composant d'élément constituant un dispositif de réfrigération A et dans laquelle un fluide frigorigène est canalisé. La présente invention comprend des premières parties en acier inoxydable et une seconde partie constituée d'un matériau ayant un module d'Young inférieur à celui de l'acier inoxydable. La présente invention comprend une pluralité de premières parties, et une seconde partie est disposée entre une première partie et une autre première partie.
PCT/JP2019/040940 2018-12-28 2019-10-17 Tuyauterie de fluide figorigène et dispositif de réfrigération WO2020137109A1 (fr)

Applications Claiming Priority (4)

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JP2018246796 2018-12-28
JP2018-246796 2018-12-28
JP2019-104589 2019-06-04
JP2019104589A JP2020109344A (ja) 2018-12-28 2019-06-04 冷媒配管及び冷凍装置

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WO2020137109A1 true WO2020137109A1 (fr) 2020-07-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113864536A (zh) * 2021-09-26 2021-12-31 新昌县杰创控股有限公司 制冷系统连接管件及制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005049071A (ja) * 2003-07-31 2005-02-24 Fuji Electric Holdings Co Ltd パルス管冷凍機
JP2005106367A (ja) * 2003-09-30 2005-04-21 Daikin Ind Ltd 空調室外機、空気調和機、及び圧縮機ユニット
JP2018189312A (ja) * 2017-05-08 2018-11-29 ダイキン工業株式会社 冷凍装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005049071A (ja) * 2003-07-31 2005-02-24 Fuji Electric Holdings Co Ltd パルス管冷凍機
JP2005106367A (ja) * 2003-09-30 2005-04-21 Daikin Ind Ltd 空調室外機、空気調和機、及び圧縮機ユニット
JP2018189312A (ja) * 2017-05-08 2018-11-29 ダイキン工業株式会社 冷凍装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113864536A (zh) * 2021-09-26 2021-12-31 新昌县杰创控股有限公司 制冷系统连接管件及制造方法
CN113864536B (zh) * 2021-09-26 2023-03-14 新昌县杰创控股有限公司 制冷系统连接管件的制造方法

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