WO2023053553A1 - 室内機および空気調和機 - Google Patents
室内機および空気調和機 Download PDFInfo
- Publication number
- WO2023053553A1 WO2023053553A1 PCT/JP2022/018473 JP2022018473W WO2023053553A1 WO 2023053553 A1 WO2023053553 A1 WO 2023053553A1 JP 2022018473 W JP2022018473 W JP 2022018473W WO 2023053553 A1 WO2023053553 A1 WO 2023053553A1
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- WIPO (PCT)
- Prior art keywords
- refrigerant pipe
- pipe
- indoor unit
- refrigerant
- casing
- Prior art date
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 271
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 95
- 239000002826 coolant Substances 0.000 abstract 1
- 238000006056 electrooxidation reaction Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 239000010949 copper Substances 0.000 description 16
- 238000005260 corrosion Methods 0.000 description 16
- 229910000838 Al alloy Inorganic materials 0.000 description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 15
- 229910052802 copper Inorganic materials 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 14
- 229910000881 Cu alloy Inorganic materials 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000009833 condensation Methods 0.000 description 9
- 230000005494 condensation Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000005219 brazing Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Images
Classifications
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
-
- 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0068—Indoor units, e.g. fan coil units characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing
-
- 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
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/032—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by heat exchangers
-
- 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
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/0326—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing characterised by the arrangement of refrigerant piping outside the heat exchanger within the unit casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
Definitions
- the present disclosure relates to indoor units and air conditioners.
- a connecting portion between a first refrigerant pipe made of aluminum or an aluminum alloy and a second refrigerant pipe made of copper or a copper alloy is connected to a falling portion of the first refrigerant pipe.
- anti-corrosion treatment is performed by disposing and covering the entire first refrigerant pipe with a heat insulating material (see, for example, Japanese Patent Application Laid-Open No. 2013-155892 (Patent Document 1)).
- the refrigerant pipes are likely to be exposed to the indoor air and condensation occurs. be provided. Since it is difficult to dry the inside of the anti-condensation cylinder, there is a problem that the connecting portions of the first and second refrigerant pipes remain wet for a long period of time, resulting in electrical corrosion.
- This disclosure proposes an indoor unit that can suppress the occurrence of electrical corrosion in refrigerant pipes and an air conditioner that includes the indoor unit.
- the indoor unit of the present disclosure is a casing; a heat exchanger housed in the casing; A connecting pipe connected to the heat exchanger and through which a refrigerant flows,
- the above connection piping is a first refrigerant pipe having one end connected to the heat exchanger and formed of a first metal; a second refrigerant pipe made of a second metal that is electrically noble with respect to the first metal of the first refrigerant pipe, One end of the second refrigerant pipe is connected to the other end of the first refrigerant pipe inside the casing.
- connection point between the first refrigerant pipe and the second refrigerant pipe is located inside the casing that is not covered with a dew-proof cylinder or the like. It is possible to suppress the occurrence of electrolytic corrosion in piping.
- the other end of the first refrigerant pipe is located above the one end of the second refrigerant pipe.
- the other end of the first refrigerant pipe is located above one end of the second refrigerant pipe, so the condensed water is transmitted to the first refrigerant pipe. and the occurrence of electric corrosion can be reliably suppressed.
- a cylindrical member that covers a part of the connection pipe but does not cover other parts of the connection pipe In the other portion, one end of the second refrigerant pipe is connected to the other end of the first refrigerant pipe.
- the connecting portion where one end of the second refrigerant pipe and the other end of the first refrigerant pipe are connected is not covered with the cylindrical member, electric corrosion due to condensed water accumulated in the cylindrical member does not occur. Reduce risk.
- the second refrigerant pipe has a bent portion that bends so as to protrude downward, The bent portion is arranged within the casing.
- the condensed water generated in the second refrigerant pipe drips at the bent portion. Condensed water is not transferred to the refrigerant pipe from the second refrigerant pipe side, and the occurrence of electric corrosion can be reliably suppressed.
- the connection pipe includes a first connection pipe and a second connection pipe
- the first connection pipe is a 1-1 refrigerant pipe having one end connected to the heat exchanger and formed of the first metal; A second metal that is electrically noble with respect to the first metal of the 1-1 refrigerant pipe and one end of which is connected to the other end of the 1-1 refrigerant pipe 1 refrigerant piping,
- the second connection pipe is One end is connected to the heat exchanger, and a 1-2 refrigerant pipe formed of the first metal, A second metal that is electrically noble with respect to the first metal of the 1-2 refrigerant pipe and one end of which is connected to the other end of the 1-2 refrigerant pipe 2 refrigerant lines (322).
- the present disclosure in both the first connection pipe and the second connection pipe, it is possible to suppress the occurrence of dew condensation on the refrigerant pipe, and it is possible to suppress the occurrence of electrolytic corrosion.
- the first connection pipe is a liquid pipe
- the second connection pipe is a gas pipe
- the other end of the 1-1 refrigerant pipe is arranged above one end of the 2-2 refrigerant pipe.
- the liquid pipe is the refrigerant pipe connected to the inlet of the evaporator (the heat exchanger during cooling or dehumidifying operation)
- the gas pipe is the refrigerant pipe connected to the outlet of the evaporator.
- the 1-1 refrigerant pipe is arranged at a position not overlapping the 2-2 refrigerant pipe.
- the condensed water dripping from the 2-2 refrigerant pipe does not hit the 1-1 refrigerant pipe.
- electric corrosion of the 1-1 refrigerant pipe can be suppressed.
- the bent portion is arranged at a position that does not overlap the electrical components in the casing.
- the bent portion of the second refrigerant pipe and the electric component do not overlap when viewed from above, it is possible to prevent the condensed water dripping from the second refrigerant pipe from hitting the electric component.
- One end of the second refrigerant pipe is connected to the other end of the first refrigerant pipe on a drain pan provided in the casing.
- the condensed water dripping from the connecting portion where one end of the second refrigerant pipe and the other end of the first refrigerant pipe are connected can be received by the drain pan and drained together with the drain water.
- the air conditioner of the present disclosure is Equipped with any of the above indoor units.
- FIG. 1 is a refrigerant circuit diagram of an air conditioner provided with an indoor unit according to a first embodiment of the present disclosure
- FIG. It is a perspective view of the indoor unit of the air conditioner of the said 1st Embodiment. It is a front view of the indoor unit of the air conditioner of the said 1st Embodiment. It is a back perspective view of the indoor unit of the air conditioner of the said 1st Embodiment.
- FIG. 4 is a cross-sectional view seen from the VV line in FIG. 3; It is the figure which looked at the indoor heat exchanger of the indoor unit of the said 1st Embodiment, and the connection pipe for liquid refrigerants, and the connection pipe for gas refrigerants from the front side.
- FIG. 7 is a schematic diagram of the main part of the indoor unit of the second embodiment of the present disclosure as seen from the front side;
- FIG. 11 is a schematic diagram of the main part of the indoor unit of the third embodiment of the present disclosure as seen from the front side;
- FIG. 1 shows a refrigerant circuit RC provided in an air conditioner provided with an indoor unit 1 according to the first embodiment of the present disclosure.
- the air conditioner of the first embodiment includes an indoor unit 1 and an outdoor unit 2 connected to the indoor unit 1 via a refrigerant circuit RC.
- the above air conditioner is a pair type air conditioner in which an indoor unit 1 and an outdoor unit 2 are one-to-one.
- the refrigerant circuit RC has a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an electric expansion valve 14, an indoor heat exchanger 15, and an accumulator 16.
- refrigerant for example, HFC refrigerant such as R410A and R32
- the indoor heat exchanger 15 is an example of a heat exchanger.
- one end of a four-way switching valve 12 is connected to the discharge side of the compressor 11 .
- One end of an outdoor heat exchanger 13 is connected to the other end of the four-way switching valve 12 .
- One end of the electric expansion valve 14 is connected to the other end of the outdoor heat exchanger 13 .
- One end of an indoor heat exchanger 15 is connected to the other end of the electric expansion valve 14 via a closing valve V1 and a connecting pipe L1.
- One end of an accumulator 16 is connected to the other end of the indoor heat exchanger 15 via a connecting pipe L2, a closing valve V2 and a four-way switching valve 12. As shown in FIG. A suction side portion of the compressor 11 is connected to the other end of the accumulator 16 .
- the indoor heat exchanger 15 and the indoor fan 18 are mounted on the indoor unit 1 .
- the indoor fan 18 is, for example, a cross-flow fan, and sucks indoor air through the indoor heat exchanger 15 .
- the compressor 11 the four-way switching valve 12 , the outdoor heat exchanger 13 , the electric expansion valve 14 , the accumulator 16 and the outdoor fan 17 are mounted on the outdoor unit 2 .
- the air conditioner switches the four-way switching valve 12 to the switching position indicated by the solid line to start the compressor 11 during the cooling operation and the dehumidifying operation. to start the compressor 11 .
- the direction of the solid line arrow in FIG. 1 indicates the direction in which the refrigerant flows during the cooling operation and the dehumidifying operation. Also, the direction of the dotted arrow in FIG. 1 indicates the direction in which the refrigerant flows during the heating operation.
- FIG. 2 is a diagram of the indoor unit 1 viewed obliquely from above
- FIG. 3 is a diagram of the indoor unit 1 viewed from the front side.
- the indoor unit 1 includes a casing 21 in which an indoor heat exchanger 15 (shown in FIG. 1), an indoor fan 18 (shown in FIG. 1), and the like are accommodated. there is
- the upper part of the casing 21 is provided with a suction port 22 for sucking the indoor air.
- a suction port 22 for sucking the indoor air.
- a blowout port 23 for blowing out air from the indoor fan 18 (indoor air heat-exchanged with the indoor heat exchanger 15) is provided in the lower part of the casing 21 .
- a horizontal flap 24 is rotatably attached to the periphery of the outlet 23 .
- the horizontal flap 24 shifts from a rest posture that closes the air outlet 23 to an operating posture that opens the air outlet 23, and the air blown out from the air outlet 23 moves in the vertical direction. to adjust.
- FIG. 4 is a rear perspective view of the indoor unit 1
- FIG. 5 is a cross-sectional view seen from line VV in FIG. In FIG. 5, 28 is an electric component part.
- the casing 21 of the indoor unit 1 includes a bottom frame 25, a front grill 26 attached to the bottom frame 25 and having a substantially rectangular opening (not shown) on the front, and a front panel 27 attached to cover the opening of the front grill 26.
- a front grill 26 surrounds the front, top, bottom and both sides of the bottom frame 25 .
- the rear side of the bottom frame 25 is attached to the wall surface of the room via a mounting plate (not shown).
- the first space 21 a is the main area within the casing 21 .
- the first space 21a accommodates the internal portion of the connecting pipe 31 for liquid refrigerant and the internal portion of the connecting pipe 32 for gas refrigerant.
- a second space 30a (pipe riser) is formed along the vertical direction.
- a third space 30b that continues to the lower end of the second space 30a is formed along the left-right direction on the rear surface and below the bottom frame 25 .
- the liquid refrigerant connection pipe 31 and the gas refrigerant connection pipe 32 are arranged to extend from the indoor heat exchanger 15 in the first space 21a along the second space 30a and the third space 30b.
- the vertical portion of the liquid refrigerant connection pipe 31 and the vertical portion of the gas refrigerant connection pipe 32 are accommodated in the second space 30a.
- the horizontal portion of the liquid refrigerant connection pipe 31 and the horizontal portion of the gas refrigerant connection pipe 32 are accommodated in the third space 30b.
- the liquid refrigerant connection pipe 31 and the gas refrigerant connection pipe 32 are led out of the casing 21 from above a drain pan 29 (shown in FIGS. 7 and 8) provided on the bottom frame 25 .
- the second space 30a and the third space 30b are outside the rear of the bottom frame 25, not inside the casing 21. That is, the second space 30 a and the third space 30 b are outside the casing 21 .
- FIG. 6 is a front view of the indoor heat exchanger 15, the liquid refrigerant connecting pipe 31, and the gas refrigerant connecting pipe 32.
- FIG. 6 is a front view of the indoor heat exchanger 15, the liquid refrigerant connecting pipe 31, and the gas refrigerant connecting pipe 32.
- the indoor heat exchanger 15 includes a heat exchange section 151 and a plurality of heat transfer tubes 152 penetrating the heat exchange section 151 in the left-right direction.
- the heat exchange portion 151 and each heat transfer tube 152 are made of aluminum or an aluminum alloy.
- the indoor unit 1 also includes a liquid refrigerant connection pipe 31 and a gas refrigerant connection pipe 32 that are fluidly connected to the heat transfer pipes 152 of the indoor heat exchanger 15 .
- the liquid refrigerant connection pipe 31 is an example of a first connection pipe, and constitutes a part of the connection pipe L1 (shown in FIG. 1).
- the gas refrigerant connection pipe 32 is an example of a second connection pipe, and constitutes a part of the connection pipe L2 (shown in FIG. 1).
- the liquid refrigerant connection pipe 31 guides the liquid refrigerant from the electric expansion valve 14 to the indoor heat exchanger 15 during cooling operation and dehumidifying operation.
- the gas refrigerant connection pipe 32 guides the gas refrigerant from the indoor heat exchanger 15 to the compressor 11 during the cooling operation and the dehumidifying operation.
- FIG. 7 is a schematic diagram of the main part of the indoor heat exchanger 15 as seen from the front side
- FIG. 8 is a schematic diagram of the main part of the indoor heat exchanger 15 as seen from the front side
- FIG. 3 is a side view of the exchanger 15, the liquid refrigerant connection pipe 31, and the gas refrigerant connection pipe 32 as viewed from the right side.
- FIG. 7 and 8, 29 is a drain pan arranged inside the casing 21 and below the indoor heat exchanger 15. As shown in FIG. 8 and 9, the tubular member 61 is omitted.
- the liquid refrigerant connection pipe 31 includes a first liquid refrigerant pipe 311 made of aluminum or an aluminum alloy, a second liquid refrigerant pipe 312 made of copper or a copper alloy, the first liquid refrigerant pipe 311 and the second liquid A connecting portion 313 made of copper or a copper alloy for connecting with a refrigerant pipe 312 is provided.
- the first liquid refrigerant pipe 311 is an example of a first refrigerant pipe and a 1-1 refrigerant pipe
- the second liquid refrigerant pipe 312 is an example of a second refrigerant pipe and a 2-1 refrigerant pipe.
- Aluminum and aluminum alloys are each examples of first metals. Copper and copper alloys are each an example of a second metal.
- One end of the second liquid refrigerant pipe 312 is connected to one end of the connecting portion 313 by copper-to-copper bonding.
- the other end of the connecting portion 313 is connected to the heat transfer pipe 152 of the indoor heat exchanger 15 via the first liquid refrigerant pipe 311 made of aluminum or aluminum alloy.
- the liquid refrigerant flare union 41 is fixed by brazing to the other end of the second liquid refrigerant pipe 312 .
- the gas refrigerant connection pipe 32 is configured in the same manner as the liquid refrigerant connection pipe 31, and includes a first gas refrigerant pipe 321 made of aluminum or an aluminum alloy and a second gas refrigerant pipe 322 made of copper or a copper alloy. , and a connecting portion 323 made of copper or a copper alloy for connecting the first gas refrigerant pipe 321 and the second gas refrigerant pipe 322 .
- the first gas refrigerant pipe 321 is an example of the first refrigerant pipe and the 1-2 refrigerant pipe.
- the second gas refrigerant pipe 322 is an example of a second refrigerant pipe and a 2-2 refrigerant pipe.
- One end of the first gas refrigerant pipe 321 is connected to one end of the connecting portion 323 by copper-to-copper bonding.
- the other end of the connecting portion 323 is connected to the heat transfer pipe 152 of the indoor heat exchanger 15 via the first gas refrigerant pipe 321 made of aluminum or aluminum alloy.
- a gas refrigerant flare union 42 is fixed to the other end of the first gas refrigerant pipe 321 by brazing.
- the second liquid refrigerant pipe 312 of the liquid refrigerant connection pipe 31 has a first portion 312a extending substantially vertically.
- the substantially vertical direction means a vertical direction or a direction inclined at an angle of, for example, 20 degrees or less with respect to the vertical direction.
- the second liquid refrigerant pipe 312 has a second portion 312b closer to the liquid refrigerant flare union 41 than the first portion 312a.
- the second portion 312b is connected to the lower end of the first portion 312a (the end on the second liquid refrigerant pipe 312 side) and is bent from the lower end toward the liquid refrigerant flare union 41 side.
- the second liquid refrigerant pipe 312 has a third portion 312c closer to the liquid refrigerant flare union 41 than the second portion 312b.
- the third portion 312c extends substantially horizontally.
- the substantially horizontal direction means a horizontal direction or a direction inclined at an angle of, for example, 20 degrees or less with respect to the horizontal direction.
- the second liquid refrigerant pipe 312 has a fourth portion 312d closer to the indoor heat exchanger 15 than the first portion 312a.
- the fourth portion 312d is bent downward by making a U-turn from the upper end of the first portion 312a.
- the second liquid refrigerant pipe 312 has a fifth portion 312e closer to the indoor heat exchanger 15 than the fourth portion 312d.
- the fifth portion 312e is an example of a bent portion.
- the fifth portion 312e is bent upward by making a U-turn from the end of the fourth portion 312d.
- An end portion of the fifth portion 312e on the indoor heat exchanger 15 side is connected to one end of a connection portion 313 made of copper or a copper alloy.
- a first liquid refrigerant pipe 311 made of aluminum or an aluminum alloy is fixed by brazing to the other end of the connecting portion 313 (the end on the indoor heat exchanger 15 side).
- the other end of the connection portion 313 is connected to the heat exchange portion 151 via the first liquid refrigerant pipe 311 .
- the gas refrigerant connection pipe 32 also has the same configuration as the liquid refrigerant connection pipe 31 .
- a tubular member 61 covers from the fourth portion 312 d of the second liquid refrigerant pipe 312 to the vicinity of the liquid refrigerant flare union 41 .
- the tubular member 61 is made of a heat insulating material (for example, foamed polyester).
- the inner diameter of the cylindrical member 61 is set to be larger than the sum of the outer diameter of the liquid refrigerant connecting pipe 31 and the outer diameter of the gas refrigerant connecting pipe 32 .
- the waterproof tube 51 is formed by heating and shrinking a tube made of a waterproof material (for example, vinyl chloride, silicon rubber, fluorine-based polymer, etc.).
- a waterproof material for example, vinyl chloride, silicon rubber, fluorine-based polymer, etc.
- the connecting pipe 31 for liquid refrigerant is arranged above the connecting pipe 32 for gas refrigerant.
- the first metal (aluminum or aluminum alloy in this embodiment) of the first liquid refrigerant pipe 311 is One end of the second liquid refrigerant pipe 312 (second refrigerant pipe) made of an electrically noble second metal (copper or copper alloy in this embodiment) and the other end of the first liquid refrigerant pipe 311 They are connected within the casing 21 .
- a second metal (copper or copper alloy in this embodiment) that is electrically noble with respect to the first metal (aluminum or aluminum alloy in this embodiment) of the first gas refrigerant pipe 321 (first refrigerant pipe) ) and the other end of the first liquid refrigerant pipe 311 are connected within the casing 21 .
- the connection between aluminum (or aluminum alloy) and copper (or copper alloy) is located inside the casing 21 not covered with a dew-proof cylinder or the like, so the occurrence of condensation at the connection can be suppressed. , the occurrence of electric corrosion in the refrigerant pipe can be suppressed.
- first liquid refrigerant pipe 311 and the second liquid refrigerant pipe 312 are connected via the connection portion 313, but the first liquid refrigerant pipe 311 and the second liquid refrigerant pipe 312 are connected without the connection portion. can be directly connected.
- first gas refrigerant pipe 321 and the second gas refrigerant pipe 322 are connected via the connection portion 323, the first gas refrigerant pipe 321 and the second gas refrigerant pipe 322 are directly connected without a connection portion. good too.
- the other end of the first liquid refrigerant pipe 311 is positioned above one end of the second liquid refrigerant pipe 312, so that the first Since the condensed water drips at the fifth portion 312e (bent portion) without being transmitted to the liquid refrigerant pipe 311, it is possible to reliably suppress the occurrence of electric corrosion (the same applies to the gas refrigerant connection pipe 32).
- the condensed water generated in the second liquid refrigerant pipe 312 can be removed from the bending portion. Since the first liquid refrigerant pipe 311 is dripped, the condensation water is not transmitted to the first liquid refrigerant pipe 311 from the second liquid refrigerant pipe 312 side, and the occurrence of electric corrosion can be reliably suppressed (the same applies to the gas refrigerant connection pipe 32).
- the indoor unit 1 it is possible to suppress the occurrence of dew condensation in both the liquid refrigerant connection pipe 31 (first connection pipe) and the gas refrigerant connection pipe 32 (second connection pipe). It can suppress the occurrence of erosion.
- the other end of the first liquid refrigerant pipe 311 (1-1 refrigerant pipe) on the liquid pipe side is arranged above one end of the second gas refrigerant pipe 322 (2-2 refrigerant pipe) on the gas pipe side. Therefore, the second gas refrigerant pipe 322 with a large amount of dew condensation is arranged below, and the occurrence of electric corrosion of the upper first liquid refrigerant pipe 311 can be suppressed.
- the first liquid refrigerant pipe 311 (1-1 refrigerant pipe) does not overlap the first gas refrigerant pipe 321 (2-2 refrigerant pipe). Condensed water dripping from 321 can be prevented from hitting the first liquid refrigerant pipe 311, and electric corrosion of the first liquid refrigerant pipe 311 can be suppressed.
- the fifth portion 312e (bending portion) of the second liquid refrigerant pipe 312 does not overlap with the electrical components (for example, the electrical component portion 28) in the casing 21. Condensed water dripping from 312 can be prevented from hitting the electric parts.
- one end of the second liquid refrigerant pipe 312 is connected to the other end of the first liquid refrigerant pipe 311 via the connection portion 313. Therefore, dripping from the connection portion 313 The condensed water can be received by the drain pan 29 and drained together with the drain water.
- FIG. 10 is a schematic diagram of main parts of the indoor unit 1 of the second embodiment of the present disclosure as seen from the front side.
- the indoor unit 1 of the second embodiment has the same configuration as the indoor unit 1 of the first embodiment except for the waterproof tube 51. As shown in FIG.
- the waterproof tube 51 covers from the junction between the connecting portion 313 and the first liquid refrigerant pipe 311 to the fourth portion 312d. As a result, the generation of condensed water from the second liquid refrigerant pipe 312 made of copper or copper alloy can be suppressed.
- the indoor unit 1 of the second embodiment has the same effects as the indoor unit 1 of the first embodiment.
- FIG. 11 is a schematic diagram of main parts of the indoor unit 1 of the third embodiment of the present disclosure as seen from the front side.
- the indoor unit 1 of the third embodiment has the same configuration as the indoor unit 1 of the first embodiment except for the third refrigerant pipe 314. As shown in FIG.
- the connecting portion 313 and the first liquid refrigerant pipe 311 are connected via the third refrigerant pipe 314 made of stainless steel.
- the first liquid refrigerant pipe 311 made of aluminum or an aluminum alloy and the third refrigerant pipe 314 made of stainless steel are brazed, and the connecting portion 313 made of copper or a copper alloy and the third Brazing with the refrigerant pipe 314 can be performed more easily than joining aluminum and copper.
- one indoor unit 1 is connected to one outdoor unit 2, but a plurality of indoor units 1 may be connected.
- the above air conditioner is of the pair type, but may be of the multi-type.
- the first liquid refrigerant pipe 311 and the first gas refrigerant pipe 321 as the first refrigerant pipe are made of aluminum or an aluminum alloy, but are made of metal other than aluminum and aluminum alloy. may be formed.
- the second liquid refrigerant pipe 312 and the second gas refrigerant pipe 322 as the second refrigerant pipe were made of copper or copper alloy. It is only necessary that the first refrigerant pipe is present and made of a metal that is noble in potential with respect to the metal of the first refrigerant pipe.
- the indoor heat exchanger 15 and the first liquid refrigerant pipe 311 are connected in the liquid refrigerant connection pipe 31, but the connection between the indoor heat exchanger 15 and the first liquid refrigerant pipe 311
- a plurality of first liquid refrigerant pipes 311 may be connected to the indoor heat exchanger 15 with flow dividers interposed therebetween (the same applies to the gas refrigerant connection pipes 32).
- First liquid refrigerant pipe (first refrigerant pipe and 1-1 refrigerant pipe ) 312... Second liquid refrigerant pipe (second refrigerant pipe and 2-1 refrigerant pipe) 312a... First part 312b... Second part 312c... Third part 312d... Fourth part 312e... Fifth part 313... Connection part 321... First gas refrigerant pipe (first refrigerant pipe and 1-2 refrigerant pipe) 322... Second gas refrigerant pipe (second refrigerant pipe and 2-2 refrigerant pipe) 323 ... connection part
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
Description
ケーシングと、
上記ケーシングに収容された熱交換器と、
上記熱交換器に接続され、冷媒が流れる接続配管と
を備え、
上記接続配管は、
一端が上記熱交換器に接続されると共に、第1の金属で形成された第1冷媒配管と、
上記第1冷媒配管の上記第1の金属に対して電位的に貴な第2の金属で形成された第2冷媒配管と
を備え、
上記第2冷媒配管の一端は、上記第1冷媒配管の他端に上記ケーシング内で接続されている。
上記第1冷媒配管の他端は上記第2冷媒配管の一端より上方に位置する。
上記接続配管の一部を覆う一方、上記接続配管の他の部分を覆わない筒部材を備え、
上記他の部分において、上記第2冷媒配管の一端は、上記第1冷媒配管の他端に接続されている。
上記第2冷媒配管は、下方に突出するように屈曲する屈曲部を有し、
上記屈曲部は、上記ケーシング内に配置されている。
上記接続配管は、第1接続配管と第2接続配管とを備え、
上記第1接続配管は、
一端が上記熱交換器に接続されると共に、上記第1の金属で形成された第1-1冷媒配管と、
上記第1-1冷媒配管の上記第1の金属に対して電位的に貴な上記第2の金属で形成されると共に一端が上記第1-1冷媒配管の他端に接続される第2-1冷媒配管とを備え、
上記第2接続配管は、
一端が上記熱交換器に接続されると共に、上記第1の金属で形成された第1-2冷媒配管とを備え、
上記第1-2冷媒配管の上記第1の金属に対して電位的に貴な上記第2の金属で形成されると共に一端が上記第1-2冷媒配管の他端に接続される第2-2冷媒配管(322)とを備える。
上記第1接続配管は液管である一方、上記第2接続配管はガス管であり、
上記ケーシング内では、上記第1-1冷媒配管の他端は、上記第2-2冷媒配管の一端より上方に配置されている。
ここで、液管とは、蒸発器(冷房運転時または除湿運転時の熱交換器)の入口に接続される冷媒配管であり、ガス管とは、蒸発器の出口に接続される冷媒配管である。
上記ケーシングの上面視において、上記第1-1冷媒配管は、上記第2-2冷媒配管と重ならない位置に配置されている。
上記ケーシングの上面視において、上記屈曲部は、上記ケーシング内の電気部品と重ならない位置に配置されている。
上記ケーシング内に設けられたドレンパン上において、上記第2冷媒配管の一端は上記第1冷媒配管の他端に接続されている。
上記のいずれかの室内機を備える。
図1は、本開示の第1実施形態の室内機1を備えた空気調和機が備える冷媒回路RCを示す。この第1実施形態の空気調和機は、室内機1と、この室内機1に冷媒回路RCを介して接続された室外機2とを備えている。上記空気調和機は、室内機1と室外機2とが一対一のペア型の空気調和機である。
液冷媒用接続配管31は、アルミニウムまたはアルミニウム合金で形成された第1液冷媒配管311と、銅または銅合金で形成された第2液冷媒配管312と、第1液冷媒配管311と第2液冷媒配管312とを連結する銅または銅合金で形成された接続部313とを備えている。第1液冷媒配管311は、第1冷媒配管および第1-1冷媒配管の一例であり、第2液冷媒配管312は、第2冷媒配管および第2-1冷媒配管の一例である。アルミニウムおよびアルミニウム合金は、それぞれ、第1の金属の一例である。銅および銅合金は、それぞれ、第2の金属の一例である。
ガス冷媒用接続配管32は、液冷媒用接続配管31と同様に構成されて、アルミニウムまたはアルミニウム合金製の第1ガス冷媒配管321と、銅または銅合金で形成された第2ガス冷媒配管322と、第1ガス冷媒配管321と第2ガス冷媒配管322とを連結する銅または銅合金で形成された接続部323とを備えている。第1ガス冷媒配管321は、第1冷媒配管および第1-2冷媒配管の一例である。第2ガス冷媒配管322は、第2冷媒配管および第2-2冷媒配管の一例である。
図7に示すように、液冷媒用接続配管31の第2液冷媒配管312は、略鉛直方向に沿って延びる第1部分312aを有する。上記略鉛直方向とは、鉛直方向、または、鉛直方向に対して例えば20度以下の角度で傾斜する方向を意味する。また、第2液冷媒配管312は、第1部分312aよりも液冷媒用フレアユニオン41側に、第2部分312bを有する。この第2部分312bは、第1部分312aの下端部(第2液冷媒配管312側の端部)に連なると共に、その下端部から液冷媒用フレアユニオン41側に向かうように屈曲している。
第2液冷媒配管312は、第1部分312aよりも室内熱交換器15側に、第4部分312dを有する。この第4部分312dは、第1部分312aの上端部からUターンして下方に向かうように屈曲している。
図10は、本開示の第2実施形態の室内機1の要部を前側から見た模式図である。この第2実施形態の室内機1は、防水チューブ51を除いて第1実施形態の室内機1と同様の構成をしている。
図11は、本開示の第3実施形態の室内機1の要部を前側から見た模式図である。この第3実施形態の室内機1は、第3冷媒配管314を除いて第1実施形態の室内機1と同様の構成をしている。
15…室内熱交換器
21…ケーシング
21a…第1スペース
22…吸込口
23…吹出口
24…水平フラップ
25…底フレーム
26…前面グリル
27…前面パネル
28…電装品部
29…ドレンパン
30a…第2スペース
30b…第3スペース
31…液冷媒用接続配管(第1接続配管)
32…ガス冷媒用接続配管(第2接続配管)
41…液冷媒用フレアユニオン
42…ガス冷媒用フレアユニオン
51…防水チューブ
61…筒部材
151…熱交換部
152…伝熱管
311…第1液冷媒配管(第1冷媒配管および第1-1冷媒配管)
312…第2液冷媒配管(第2冷媒配管および第2-1冷媒配管)
312a…第1部分
312b…第2部分
312c…第3部分
312d…第4部分
312e…第5部分
313…接続部
321…第1ガス冷媒配管(第1冷媒配管および第1-2冷媒配管)
322…第2ガス冷媒配管(第2冷媒配管および第2-2冷媒配管)
323…接続部
Claims (10)
- ケーシング(21)と、
上記ケーシング(21)に収容された熱交換器(15)と、
上記熱交換器(15)に接続され、冷媒が流れる接続配管(31,32)と
を備え、
上記接続配管(31,32)は、
一端が上記熱交換器(15)に接続されると共に、第1の金属で形成された第1冷媒配管(311,321)と、
上記第1冷媒配管(311,321)の上記第1の金属に対して電位的に貴な第2の金属で形成された第2冷媒配管(312,322)と
を備え、
上記第2冷媒配管(312,322)の一端は、上記第1冷媒配管(311,321)の他端に上記ケーシング(21)内で接続されている、室内機(1)。 - 請求項1に記載の室内機(1)において、
上記第1冷媒配管(311,321)の他端は上記第2冷媒配管(312,322)の一端より上方に位置する、室内機(1)。 - 請求項1または2に記載の室内機(1)において、
上記接続配管(31,32)の一部を覆う一方、上記接続配管(31,32)の他の部分を覆わない筒部材(61)を備え、
上記他の部分において、上記第2冷媒配管(312,322)の一端は、上記第1冷媒配管(311,321)の他端に接続されている、室内機(1)。 - 請求項1から3までのいずれか一項に記載の室内機(1)において、
上記第2冷媒配管(312,322)は、下方に突出するように屈曲する屈曲部(312e)を有し、
上記屈曲部(312e)は、上記ケーシング(21)内に配置されている、室内機(1)。 - 請求項1から4までのいずれか一項に記載の室内機(1)において、
上記接続配管(31,32)は、第1接続配管(31)と第2接続配管(32)とを備え、
上記第1接続配管(31)は、
一端が上記熱交換器(15)に接続されると共に、上記第1の金属で形成された第1-1冷媒配管(311)と、
上記第1-1冷媒配管(311)の上記第1の金属に対して電位的に貴な上記第2の金属で形成されると共に一端が上記第1-1冷媒配管(311)の他端に接続される第2-1冷媒配管(312)とを備え、
上記第2接続配管(32)は、
一端が上記熱交換器(15)に接続されると共に、上記第1の金属で形成された第1-2冷媒配管(321)とを備え、
上記第1-2冷媒配管(321)の上記第1の金属に対して電位的に貴な上記第2の金属で形成されると共に一端が上記第1-2冷媒配管(321)の他端に接続される第2-2冷媒配管(322)とを備える、室内機(1)。 - 請求項5に記載の室内機(1)において、
上記第1接続配管(31)は液管である一方、上記第2接続配管(32)はガス管であり、
上記ケーシング(21)内では、上記第1-1冷媒配管(311)の他端は、上記第2-2冷媒配管(322)の一端より上方に配置されている、室内機(1)。 - 請求項6に記載の室内機(1)において、
上記ケーシング(21)の上面視において、上記第1-1冷媒配管(311)は、上記第2-2冷媒配管(322)と重ならない位置に配置されている、室内機(1)。 - 請求項4に記載の室内機(1)において、
上記ケーシング(21)の上面視において、上記屈曲部(312e)は、上記ケーシング(21)内の電気部品と重ならない位置に配置されている、室内機(1)。 - 請求項1から4までのいずれか一項に記載の室内機(1)において、
上記ケーシング(21)内に設けられたドレンパン(29)上において、上記第2冷媒配管(312,322)の一端は上記第1冷媒配管(311,321)の他端に接続されている、室内機(1)。 - 請求項1から9までのいずれか一項に記載の室内機(1)を備えた空気調和機。
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