WO2020161761A1 - 熱交換器およびこれを備えた空気調和装置 - Google Patents
熱交換器およびこれを備えた空気調和装置 Download PDFInfo
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- WO2020161761A1 WO2020161761A1 PCT/JP2019/003823 JP2019003823W WO2020161761A1 WO 2020161761 A1 WO2020161761 A1 WO 2020161761A1 JP 2019003823 W JP2019003823 W JP 2019003823W WO 2020161761 A1 WO2020161761 A1 WO 2020161761A1
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- refrigerant
- heat exchanger
- partition plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
- F25B39/028—Evaporators having distributing means
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
- F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
- F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
- F28F9/0214—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only longitudinal partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
- F28F9/0224—Header boxes formed by sealing end plates into covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
- F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
- F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
Definitions
- the present invention relates to a heat exchanger that distributes a gas-liquid two-phase refrigerant from a refrigerant distributor to a plurality of heat transfer tubes, and an air conditioner including the heat exchanger.
- the liquid refrigerant condensed in the heat exchanger mounted on the indoor unit and functioning as a condenser is decompressed by the expansion valve to be in a gas-liquid two-phase state in which the gas refrigerant and the liquid refrigerant are mixed. .. Then, the refrigerant in the gas-liquid two-phase state flows into the heat exchanger mounted on the outdoor unit and functioning as an evaporator.
- the heat exchanger is a high-performance heat exchanger by using a flat tube for the heat transfer tube and corrugated fins provided between the adjacent flat tubes.
- a method has been proposed in which a header having a double pipe structure is used in the refrigerant distributor to improve the refrigerant distribution (for example, see Patent Document 1).
- the header of the heat exchanger has a double pipe structure, an orifice is provided in the inner pipe of the double pipe, and the position of the orifice is adjusted to make the refrigerant distributed to a plurality of flat tubes uniform, It improves the refrigerant distribution performance of the distributor.
- the flat tube has a larger dimension in the width direction than the conventional heat transfer tube is a circular tube, and since the outer tube of the double tube has a large diameter, the amount of refrigerant accumulated inside the header becomes large. Will end up. Further, if the outer tube and the inner tube of the double tube are made smaller in diameter in order to reduce the amount of the refrigerant, the fluid resistance increases and the refrigerant distribution performance deteriorates.
- the present invention has been made to solve the above problems, and a heat exchanger capable of improving the refrigerant distribution performance while reducing the volume of the refrigerant distributor, and an air conditioner including the same. Is intended to provide.
- a heat exchanger is a tubular refrigerant distributor that is formed with a plurality of heat transfer tubes at intervals in a first direction, and has an insertion hole into which an end of the heat transfer tube is inserted from a second direction. And a first space on the side where the end of the heat transfer tube is inserted and a first space on the side where the end of the heat transfer tube is not inserted.
- a first partition plate for partitioning into a second space having a larger volume than the space; and an inflow pipe provided on one side surface for allowing a gas-liquid two-phase refrigerant to flow into the second space, the heat transfer pipe comprising: In the first space, an end portion is inserted into the insertion hole so as to be spaced apart from the first partition plate, and the first partition plate corresponds to each of the adjacent heat transfer tubes, An orifice is provided which connects the first space and the second space.
- the air conditioner according to the present invention is provided with a refrigerant circuit in which a compressor, a condenser, an expansion valve, and an evaporator are connected by piping, and a refrigerant flows, and the heat exchange is performed on the condenser or the evaporator. It uses a container.
- the inside of the refrigerant distributor is not inserted into the first space on the side where the end of the heat transfer tube is inserted by the first partition plate and the end of the heat transfer tube. It is partitioned into a second space having a larger volume than the first space on the side.
- the heat transfer tube is inserted into the insertion hole so that the end portion is spaced apart from the first partition plate in the first space, and the first partition plate corresponds to each of the adjacent heat transfer tubes.
- the refrigerant flow path can be divided into the first space and the second space, and the heat transfer tube and the refrigerant can be separated from each other as compared with the case where the inside of the refrigerant distributor is not divided into two spaces.
- the fluid resistance at the connection with the distributor can be reduced, and the capacity of the refrigerant distributor can be reduced.
- the first space communicates with the first direction, and the gas-liquid two-phase refrigerant ejected from the orifice is mixed with the space formed by the adjacent heat transfer tubes, so that the refrigerant distribution performance is improved. , Heat exchanger performance can be improved.
- FIG. 3 is an example of a schematic side view of a vertical cross section of the heat exchanger according to Embodiment 1 of the present invention.
- FIG. 7 is an example of a schematic side view of a vertical cross section of a heat exchanger according to a modification of the first embodiment of the present invention.
- 1 is an example of a schematic front view of a vertical cross section of a heat exchanger according to Embodiment 1 of the present invention. It is an example of a schematic front view of a vertical cross section of a conventional heat exchanger having a single-layer structure of a refrigerant channel. It is an example of the side surface schematic diagram of the longitudinal cross section of the heat exchanger which concerns on Embodiment 2 of this invention.
- FIG. 11 is a schematic diagram showing an example of a flow path cross section of a flat tube of a heat exchanger according to a second modification of the second embodiment of the present invention. It is an example of the side surface schematic diagram of the longitudinal cross section of the heat exchanger which concerns on the 3rd modification of Embodiment 2 of this invention.
- FIG. 7 is an example of a schematic plan view of a cross section of a refrigerant distributor that is bent into an L shape in the heat exchanger according to Embodiment 2 of the present invention. It is a figure explaining the vertical cross section of the refrigerant distributor shown in FIG. It is a figure explaining the longitudinal cross-sectional view of the modification of the refrigerant distributor shown in FIG.
- FIG. 13 is an example of a schematic side view of a vertical cross section of a heat exchanger according to a fourth modification of the second embodiment of the present invention. It is an example of the plane schematic diagram of a cross section of the refrigerant distributor of the heat exchanger concerning Embodiment 3 of the present invention. It is an example of the plane schematic diagram of the cross section of the refrigerant distributor of the heat exchanger which concerns on the modification of Embodiment 3 of this invention. It is an example of the plane schematic diagram of the cross section of the refrigerant distributor of the heat exchanger which concerns on Embodiment 4 of this invention.
- Embodiment 1. 1 is an example of a schematic side view of a vertical cross section of a heat exchanger 100 according to Embodiment 1 of the present invention.
- FIG. 2 is an example of a schematic side view of a vertical cross section of the heat exchanger 100 according to the modification of the first embodiment of the present invention.
- FIG. 3 is an example of a schematic front view of a vertical cross section of the heat exchanger 100 according to Embodiment 1 of the present invention.
- the heat exchanger 100 includes a plurality of flat tubes 1, corrugated fins 7, and a refrigerant distributor 200.
- the refrigerant distributor 200 includes a header outer pipe bottom plate 2, a header outer pipe upper plate 3, a first partition plate 4, an upstream side face lid 8, a downstream side face lid 9, and an inflow pipe 10. ..
- the refrigerant distributor 200 has a tubular shape, extends in the horizontal direction (direction orthogonal to the paper surface of FIG. 1), and has a rectangular cross section in the vertical direction (vertical direction of FIG. 1). Further, the first partition plate 4 is provided with a plurality of orifices 5 along the horizontal direction. It should be noted that each of the orifices 5 may be arranged at a position displaced in the width direction of the refrigerant distributor 200 (left-right direction in FIG. 1 ). With such a configuration, in the adjacent orifices 5, the influence of the upstream orifice 5 disturbing the flow of the downstream orifice 5 can be suppressed, and the refrigerant distribution performance can be improved.
- a plurality of orifices 5 may be provided in the width direction of the refrigerant distributor 200.
- the distribution performance in the width direction can be improved.
- the heat transfer tube is the flat tube 1 which is long in the width direction of the refrigerant distributor 200 and the width dimension of the internal flow path of the refrigerant distributor 200 is larger than that of the flat tube 1 as in the first embodiment.
- the heat exchanger 100 is particularly remarkable.
- a circular tube may be used instead of the flat tube 1 as the heat transfer tube. Even if the heat transfer tube is a circular tube, the capacity of the refrigerant distributor 200 can be reduced.
- the end portions of the plurality of flat tubes 1 are inserted into the insertion holes 3a formed at intervals in the longitudinal direction of the header outer tube upper plate 3, and are aligned in the longitudinal direction of the refrigerant distributor 200 at equal pitches.
- the insertion hole 3a has a shape that is longer in the third direction than in the first direction.
- the flat tube 1 has a flat rectangular horizontal cross section facing the header outer tube upper plate 3.
- Corrugated fins 7 are provided between the adjacent flat tubes 1, and the corrugated fins 7 are joined to the outer tube surface of the flat tube 1.
- an upstream side surface lid 8 and a downstream side surface lid 9 are connected to the end portions of the header outer tube bottom plate 2, the header outer tube upper plate 3 and the first partition plate 4, respectively.
- an inflow pipe 10 is connected to the upstream side lid 8 so as to penetrate therethrough, and the inflow pipe 10 is a first space 36 which is a vertical space in the refrigerant distributor 200 partitioned by the first partition plate 4. And, of the second space 37, it communicates with the lower second space 37.
- the side of the refrigerant distributor 200 where the upstream side surface lid 8 is provided is the upstream side
- the side where the downstream side surface lid 9 is provided is the downstream side
- the arrow in FIG. 3 represents the flow of the gas-liquid two-phase refrigerant.
- the gas-liquid two-phase refrigerant flows into the refrigerant distributor 200 from the inflow pipe 10 and flows through the refrigerant flow path that is the second space 37 formed by the first partition plate 4 and the header outer pipe bottom plate 2 to the downstream side lid 9 side. Flow toward. Then, in the process, the refrigerant is sprayed on the first space 36 formed by the first partition plate 4, the header outer pipe upper plate 3 and the header outer pipe bottom plate 2 in sequence in the orifice 5.
- the sprayed refrigerant is agitated in the space formed between the flat tubes 1 adjacent to each other, and in the case of the modified example, the gas-liquid refrigerant sprayed from the left and right orifices 5 becomes homogeneous and the left and right orifices 5 are distributed. It is distributed to the plurality of flat tubes 1 in a state where the bias is suppressed. After that, the refrigerant exchanges heat with the external air in the process of flowing through the flat tube 1, and flows while evaporating.
- the refrigerant flow passage which is the space inside the refrigerant distributor 200, has a two-layer structure, so that the reduced fluid resistance and the expanded fluid resistance generated at the insertion portion of the flat tube 1 into the refrigerant distributor 200 are reduced. This can be suppressed, and the refrigerant distributor 200 can be thinned accordingly.
- FIG. 4 is an example of a schematic front view of a vertical cross section of a conventional heat exchanger 101 having a single-layer refrigerant flow path structure.
- the gas-liquid two-phase refrigerant collides with a portion inserted into the inside of the refrigerant distributor 200 from the insertion hole 3 a of the flat tube 1 and is reduced in size.
- a large fluid resistance is generated in the process of the refrigerant passing through the flow path.
- the flow passage expands, so that an expanded fluid resistance is generated due to the rapid expansion.
- the pressure loss due to the contraction and expansion of the flow passage is larger than the frictional fluid resistance of the internal fluid resistance that is inversely proportional to the flow passage area.
- the flat tube 1 is 1 ⁇ 4 of the flow path height in the refrigerant distributor 200 in order to secure a brazing allowance. As described above, it has been found that it becomes particularly noticeable when it is inserted into the refrigerant distributor 200.
- the first partition plate 4 provided inside the refrigerant distributor 200 to suppress the fluid resistance due to the contraction and expansion of the flow path results in the refrigerant distributor 200. Can be made thinner. Furthermore, it was found that the flow passage cross-sectional area and volume can be reduced, and the distribution can be improved while reducing the amount of refrigerant.
- the refrigerant distributor 200 has a rectangular cross section in the vertical direction, but is not limited to this.
- a circular shape, an elliptical shape, or the like may be used, but in order to secure a brazing allowance, the D-shape and the rectangular shape in which the connection surface of the refrigerant distributor 200 with the flat tube 1 is a linear shape is the minimum wax. It's even easier to secure the allowance.
- the first space 36 on the side into which the end of the flat tube 1 is inserted communicates with the refrigerant distributor 200 in the longitudinal direction.
- the orifice 5 is provided in the first partition plate 4, and the center of the orifice 5 is provided so as to be located between the adjacent flat tubes 1.
- the upstream side of the refrigerant distributor 200 which is the upstream side surface lid 8 side (hereinafter, also referred to as one side surface side), and the downstream side surface lid 9 side (hereinafter, the side surface facing one side surface). It is important that the difference in pressure loss from the downstream side (also referred to as the side) is small. Therefore, in the space inside the refrigerant distributor 200 partitioned by the first partition plate 4, the second space 37 on the side where the end of the flat tube 1 is not inserted has a larger volume than the first space 36.
- the difference in pressure loss between the upstream side and the downstream side of the refrigerant distributor 200 is reduced, the refrigerant distribution performance is improved, and the amount of refrigerant can be reduced.
- the second space 37 is longer in the width direction than in the height direction. Therefore, the refrigerant distributor 200 can be formed to be thin, and the heat transfer area of the heat exchanger 100 can be correspondingly expanded.
- the type of gas-liquid two-phase refrigerant flowing through the refrigerant distributor 200 is not particularly limited. However, when a low-pressure refrigerant is generally used as the refrigerant of the air conditioner, which is lower than the R410A refrigerant or the R32 refrigerant, the gas density is small, and the effect of suppressing the pressure loss by the first partition plate 4 is particularly high. Can be large.
- the refrigerant flowing through the refrigerant distributor 200 is a low-pressure refrigerant such as an olefin-based refrigerant (R1234yf, R1234ze(E), etc.), propane, DME (dimethyl ether), or a mixed refrigerant obtained by adding these to one of the components.
- a refrigerant may be used.
- these refrigerants have a small gas density, and the effect of suppressing the pressure loss by the first partition plate 4 can be increased.
- the refrigerant flowing through the refrigerant distributor 200 may be a non-azeotropic mixed refrigerant having different boiling points, and in this non-azeotropic mixed refrigerant, gas and liquid are diffused by the orifice 5. Therefore, the composition distribution is further improved by the refrigerant distribution improvement, and the effect of improving the heat exchanger performance can be increased.
- the heat exchanger 100 has the plurality of heat transfer tubes and the insertion holes 3a formed at intervals in the first direction, and the ends of the heat transfer tubes being inserted from the second direction.
- a cylindrical refrigerant distributor 200 has a first space 36 in which the end of the heat transfer tube is inserted and a second space 37 having a larger volume than the first space 36 in which the end of the heat transfer tube is not inserted. It is provided with a first partition plate 4 for partitioning into, and an inflow pipe 10 which is provided on one side surface and allows a gas-liquid two-phase refrigerant to flow into the second space 37.
- the heat transfer tube is inserted into the insertion hole 3a such that the end portion thereof is spaced apart from the first partition plate 4 in the first space 36. Further, the first partition plate 4 is provided with the orifices 5 that connect the first space 36 and the second space 37 to each other so as to correspond to each of the adjacent heat transfer tubes.
- the inside of the refrigerant distributor 200 has the first space 36 on the side where the end of the heat transfer tube is inserted by the first partition plate 4 and the end of the heat transfer tube. It is partitioned into a second space 37 having a larger volume than the first space 36 on the side not inserted. Further, the heat transfer tube is inserted into the insertion hole 3a so that the end portion thereof is spaced apart from the first partition plate 4 in the first space 36, and the first partition plate 4 has a space between adjacent heat transfer tubes. Corresponding to each of them, the orifice 5 that connects the first space 36 and the second space 37 is provided.
- the refrigerant flow path can be divided into the first space 36 and the second space 37, and compared with the case where the inside of the refrigerant distributor 200 is not divided into two spaces.
- the fluid resistance at the connection between the heat pipe and the refrigerant distributor 200 can be reduced, and the capacity of the refrigerant distributor 200 can be reduced.
- the first space 36 communicates in the first direction and the gas-liquid two-phase refrigerant ejected from the orifice 5 is mixed with the space formed by the adjacent heat transfer tubes, the refrigerant distribution performance is improved. Improved and heat exchanger performance can be improved.
- Embodiment 2 the second embodiment of the present invention will be described, but the description of the same parts as those of the first embodiment will be omitted, and the same or corresponding parts as those of the first embodiment will be designated by the same reference numerals.
- FIG. 5 is an example of the side surface schematic of the longitudinal cross section of the heat exchanger 100 which concerns on Embodiment 2 of this invention.
- FIG. 6 is an example of a schematic front view of a vertical cross section of the heat exchanger 100 according to Embodiment 2 of the present invention.
- the first partition plate 4 and the header outer pipe bottom plate 2 are formed on the upstream side lid 8 side of the refrigerant distributor 200.
- a second partition plate 6 is provided to partition the refrigerant flow path, which is the second space 37, in the width direction.
- the arrow in FIG. 6 represents the flow of the gas-liquid two-phase refrigerant.
- the gas-liquid two-phase refrigerant flows into the refrigerant distributor 200 from the inflow pipe 10, and is the refrigerant flow path that is the second space 37 formed by the first partition plate 4, the second partition plate 6 and the header outer pipe bottom plate 2. Flowing toward the downstream side lid 9 side. Then, in the process, the refrigerant is sprayed on the first space 36 formed by the first partition plate 4, the header outer pipe upper plate 3 and the header outer pipe bottom plate 2 in sequence in the orifice 5.
- the sprayed refrigerant is agitated in the space formed between the flat tubes 1 adjacent to each other, and the gas-liquid refrigerant sprayed from the left and right orifices 5 becomes homogeneous, and the uneven distribution of the left and right orifices 5 is suppressed.
- FIG. 7 is a schematic diagram showing an example of a flow path cross section of the flat tube 1 of the heat exchanger 100 according to Embodiment 2 of the present invention.
- FIG. 8 is a schematic diagram showing an example of a flow path cross section of the flat tube 1 of the heat exchanger 100 according to the first modification of the second embodiment of the present invention.
- FIG. 9 is a schematic diagram showing an example of a flow path cross section of the flat tube 1 of the heat exchanger 100 according to the second modification of the second embodiment of the present invention.
- the flat tube 1 is a heat transfer tube made of a metal such as aluminum, copper, or stainless, and has a flat rectangular cross section as shown in FIG.
- the flat tube 1 may be a flat porous tube having a plurality of partition columns 1a provided therein as shown in FIG.
- the pressure resistance can be improved by the partition column 1a, and the wall thickness of the flat tube 1 can be reduced.
- the flat tube 1 has a plurality of partition columns 1a provided therein, and further, a plurality of convex portions 1b are formed along the flow path between adjacent partition columns 1a.
- FIG. 10 is an example of the side surface schematic of the longitudinal cross section of the heat exchanger 100 which concerns on the 3rd modification of Embodiment 2 of this invention.
- the shape of the refrigerant distributor 200 may be a substantially D shape in which the header outer tube bottom plate 2 has an R shape.
- the pressure resistance of the header outer pipe bottom plate 2 is improved and the wall thickness of the header outer pipe bottom plate 2 can be reduced correspondingly as compared with the case of a rectangular shape. ..
- the header outer tube upper plate 3 has a straight portion, the flat tube 1 has good brazing properties, and the insertion amount of the flat tube 1 can be reduced.
- the effective sectional area formed by the header outer pipe upper plate 3, the first partition plate 4, and the header outer pipe bottom plate 2 is A, and the first partition plate 4, the second partition plate 6, the header outer pipe bottom plate 2,
- B1+B2>A it is preferable to set B1+B2>A. By doing so, it is possible to allocate a large amount of area to the left and right refrigerant flow paths located on the lower side of the flow path cross-sectional area of the flow path formed inside the refrigerant distributor 200. It is possible to suppress an increase in pressure loss in the refrigerant flow path of the above and improve the refrigerant distribution performance.
- FIG. 11 is an example of the side surface schematic of the longitudinal cross section of the heat exchanger 100 which concerns on Embodiment 2 of this invention.
- the shape of the header outer tube upper plate 3 of the refrigerant distributor 200 may be a distorted semicircular shape.
- the pressure resistance is improved as compared with the case of a linear shape, and the wall thickness of the header outer tube upper plate 3 can be reduced accordingly. Since the wall thickness of the header outer pipe upper plate 3 can be made smaller than the wall thickness of the header outer pipe bottom plate 2, the material can be reduced.
- the effective cross-sectional area formed by the header outer pipe upper plate 3 and the first partition plate 4 is A
- the first partition plate 4, the second partition plate 6, and the header outer pipe bottom plate 2 are
- B1+B2>A it is preferable to set B1+B2>A.
- FIG. 12 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on Embodiment 2 of this invention.
- FIG. 13 is a diagram showing the flow of the refrigerant inside the refrigerant distributor 200 shown in FIG.
- the orifices 5 are provided between the adjacent flat tubes 1 and on the left and right refrigerant flow passages partitioned by the second partition plate 6.
- the upstream end of the second partition plate 6 is arranged with a space from the inflow pipe 10, and the refrigerant flowing from the inflow pipe 10 into the refrigerant distributor 200 is divided into two flow paths. It is like this.
- the second partition plate 6 and the inflow pipe 10 are separated by a distance L.
- the gas-liquid two-phase refrigerant flowing through the inflow pipe 10 is distributed to the left and right refrigerant passages at the upstream end of the second partition plate 6. Then, it passes through a plurality of orifices 5 provided at the top of each refrigerant flow path, is sprayed and stirred, and is formed by the header outer pipe upper plate 3, the first partition plate 4, and the header outer pipe bottom plate 2. It is distributed to the first space 36. Therefore, the refrigerants that have respectively flowed in the left and right refrigerant flow paths join together in the first space 36 formed by the header outer pipe upper plate 3, the first partition plate 4, and the header outer pipe bottom plate 2.
- the center position of the orifice 5 is provided between the flat tubes 1 adjacent to each other, and when the orifices 5 are provided between the plurality of flat tubes 1, the refrigerants in the left and right refrigerant channels are uniformly mixed in the first space 36. It is easy and has a great effect of improving the refrigerant distribution performance. With such a structure, the bias of the left and right liquid refrigerant inside the refrigerant distributor 200 can be improved.
- the flow passage cross section of the second space 37 approaches a square shape, so that the flow mode is an annular flow or a large amount of gas refrigerant flowing near the pipe center of the refrigerant distributor 200. It becomes easier to transition to the churn style. As a result, the flow rate and the dryness range of the refrigerant effective for improving the refrigerant distribution performance by spraying the orifice 5 are expanded. Therefore, the range in which the refrigerant distribution performance can be improved by spraying the orifice 5 is widened.
- connection position and the distance of the inflow pipe 10 are not limited, but according to the experiments of the inventors, the end portion of the inflow pipe 10 on the insertion side and the second partition plate 6 are If the distance L is equal to or larger than the inner diameter of the inflow pipe 10, it is preferable that the pressure loss becomes relatively small.
- the refrigerant distributor 200 may be configured such that the left and right refrigerant flow paths have different flow passage cross-sectional areas. By doing so, it is possible to arrange the refrigerant distributor 200 such that the flow passage having a large flow passage cross-sectional area is on the windward side and the flow passage having a small flow passage cross-sectional area is on the leeward side. Further, a large amount of refrigerant can be distributed to the windward side where the temperature difference between the refrigerant and air is large and the amount of heat exchange is large, and heat exchange efficiency can be improved.
- the refrigerant distributor 200 has one inflow pipe 10
- a plurality of inflow pipes 10 may be provided.
- a valve or a capillary tube for flow adjustment may be provided on the upstream side of the inflow pipe 10.
- FIG. 14 is an example of a schematic plan view of a cross section of a refrigerant distributor 200 that is bent into an L shape of the heat exchanger 100 according to Embodiment 2 of the present invention.
- FIG. 15 is a diagram illustrating a vertical cross section of the refrigerant distributor 200 shown in FIG. As shown in FIG. 14, the inside of the refrigerant distributor 200 when the refrigerant distributor 200 is bent in an L-shape (not necessarily strictly L-shape) from the first direction to the third direction.
- L-shape not necessarily strictly L-shape
- the refrigerant flow mode is described as an example of the annular flow or the churn flow, but it is not limited to this. For example, it may be a slug flow, a laminar flow, or a bubbly flow.
- FIG. 16 is a figure explaining the longitudinal cross-sectional view of the modification of the refrigerant distributor 200 shown in FIG.
- FIG. 17 is an example of the side surface schematic of the longitudinal cross section of the heat exchanger 100 which concerns on the 4th modification of Embodiment 2 of this invention.
- the centers of the plurality of orifices 5 provided in the first partition plate 4 are indicated by arrows in FIG. 16 rather than the center lines (CC, DD) of the left and right refrigerant passages. You may make it arrange
- the center line CC and DD of the left and right refrigerant flow paths when the width of the first partition plate 4 is defined as L2 as shown in FIG. 17, the center line CC and the outside of the header are defined.
- the distance L3 from the inner side surface on the leeward side (left side) of the tube bottom plate 2 satisfies 1 ⁇ 4 ⁇ L2.
- the distance L4 between the center line DD and the inner side surface of the header outer tube bottom plate 2 on the leeward side (left side) satisfies 3/4 ⁇ L2.
- the black arrow in FIG. 17 represents the flow direction of the air passing through the flat tube 1, and in such a case, the temperature difference between the air and the refrigerant in the region on the windward side of the flat tube 1 becomes large, and the heat exchange amount becomes large. growing. Therefore, if the inside diameter of the orifice 5 on the windward side of the left and right refrigerant flow paths, that is, on the right side of the refrigerant flow path in FIG. A large amount of liquid refrigerant can be distributed to a portion where the temperature difference between the refrigerant and the refrigerant is large.
- the fins of the heat exchanger 100 are described as the corrugated fins 7.
- the present invention is not limited to this, and may be another type of fin such as a plate fin. May be.
- the refrigerant distributor 200 partitions the second space 37 in the third direction and forms the two flow paths in the second space 37. It is equipped with.
- the second partition plate 6 is provided inside the refrigerant distributor 200. Therefore, the flow pattern of the refrigerant flowing through the flow path is likely to transition to the annular flow or the churn flow, and the range in which the refrigerant distribution performance by the atomization of the orifice 5 can be improved is widened.
- the inflow pipe 10 and the second partition plate 6 are arranged with a space therebetween.
- the refrigerant flowing from the inflow pipe 10 into the refrigerant distributor 200 is divided into two flow paths.
- the distance between the inflow pipe 10 and the second partition plate 6 is equal to or larger than the inner diameter of the inflow pipe 10. According to the heat exchanger 100 according to the second embodiment, the pressure loss can be relatively reduced.
- the refrigerant distributor 200 is bent into an L shape. According to the heat exchanger 100 according to the second embodiment, by providing the second partition plate 6 inside the refrigerant distributor 200, when the gas-liquid two-phase refrigerant flows in the bent portion, liquid generated by centrifugal force is applied. The bias of the refrigerant is suppressed, and the heat exchange efficiency can be improved.
- Embodiment 3 Hereinafter, the third embodiment of the present invention will be described, but the description of the same parts as those of the first and second embodiments will be omitted, and the same or corresponding parts as those of the first and second embodiments will be designated by the same reference numerals. ..
- FIG. 18 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on Embodiment 3 of this invention.
- the first partition plate 4 of the refrigerant distributor 200 is provided with a plurality of orifices 5, and the orifices 5 between the flat tubes 1 adjacent to each other are provided. In each case, it is provided only on one of the left and right refrigerant passages.
- the orifice 5 is provided only on the upstream side lid 8 side on the right side refrigerant passage, and the orifice 5 is provided only on the downstream side lid 9 side on the left side refrigerant passage. ..
- FIG. 19 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on the modification of Embodiment 3 of this invention.
- a passage blocking plate that closes the refrigerant passage in the middle of the right refrigerant passage, specifically, at a position downstream of the most downstream orifice 5 in the right refrigerant passage. 12 may be provided. By doing so, the sealed space 13 in which the refrigerant does not flow can be formed in a part of the right side refrigerant flow path, and the refrigerant filling amount can be suppressed.
- the orifice 5 is provided only on one of the two refrigerant passages between the adjacent heat transfer tubes, and one of the two refrigerant passages is provided. It is provided only on the side surface side facing the one side surface on the refrigerant channel, and only on the one side surface side on the other refrigerant channel.
- a sufficient space can be provided on the downstream side in one of the refrigerant flow paths, so that the effect of the refrigerant colliding with the downstream side surface lid 9 and being disturbed is mitigated. Can be made.
- the flow path closing plate 12 that closes the refrigerant flow path is provided in the middle of one of the two refrigerant flow paths. Has been. Further, the flow path closing plate 12 is provided at a position closer to the side surface facing one side surface than the orifice 5 on the side surface facing the most one side surface.
- the sealed space 13 in which the refrigerant does not flow can be formed in a part of the refrigerant flow passage on the right side, and the refrigerant filling amount can be suppressed.
- FIG. 20 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on Embodiment 4 of this invention.
- the second partition plate 6 is provided only in the region on the downstream side.
- the second partition plate 6 and the flow path closing plate 12 in a region where the flow rate of the refrigerant is small and the flow mode transitions to a separated flow such as a slag flow or a wavy flow, the flow channel cross-sectional area is reduced and the flow velocity of the refrigerant is reduced. Goes up. Therefore, the flow mode can be easily changed to the annular flow or the churn flow and can be easily maintained. Further, even if the refrigerant distributor 200 is bent into an L shape in the region where the second partition plate 6 is present, deterioration of refrigerant distribution due to the bending can be suppressed.
- FIG. 21 is a characteristic diagram of refrigerant distribution by the first partition plate 4 of the refrigerant distributor 200 of the heat exchanger 100 according to Embodiment 4 of the present invention.
- FIG. 21 is a characteristic schematic diagram of refrigerant distribution by the first partition plate 4 in each of the annular flow and the separated flow, which is measured based on the experiments by the inventors. Further, the range surrounded by the dotted line in FIG. 21 represents the region of the refrigerant distributed to the orifice 5.
- the numbers in parentheses in FIG. 22 correspond to the orifices 5 and the graph.
- the flow pattern of annular flow or churn flow is determined based on, for example, the modified Baker diagram.
- the flow passage cross-sectional area of the second partition plate 6 is such that the inlet of the region that narrows the coolant flow passage has a refrigerant flow pattern in which a large amount of gas coolant such as annular flow or churn flow flows near the center of the coolant flow passage. To decide.
- the second partition plate 6 is provided only in the area on the side surface side that faces one side surface. According to the heat exchanger 100 according to the fourth embodiment, the refrigerant can be distributed without using a partition on the upstream side where the flow rate of the refrigerant is large and the flow mode is likely to transition to the annular flow or the churn flow.
- Embodiment 5 a fifth embodiment of the present invention will be described, but the description of the same parts as those of the first to fourth embodiments will be omitted, and the same or corresponding parts as those of the first to fourth embodiments will be designated by the same reference numerals. ..
- FIG. 22 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on Embodiment 5 of this invention.
- the heat exchanger 100 according to the fifth embodiment as shown in FIG. 22, it is located in the middle of the right side refrigerant passage, specifically, on the upstream side of the most upstream orifice 5 in the right side refrigerant passage.
- a flow path closing plate 12 that closes the refrigerant flow path is provided at the position.
- a gap is provided between the second partition plate 6 and the downstream side lid 9, and the left and right refrigerant flow paths partitioned by the second partition plate 6 of the refrigerant distributor 200 are connected in series on the downstream side. ing.
- the gas-liquid two-phase refrigerant flows back from the left side refrigerant passage to the right side refrigerant passage on the downstream side.
- FIG. 23 is a diagram illustrating distribution characteristics of the refrigerant by the refrigerant distributor 200 of the heat exchanger 100 according to the fifth embodiment of the present invention. Note that the numbers in parentheses in FIG. 23 are an example of numerical representation of the rough characteristics of the liquid refrigerant distribution ratio in the flow mode of the separated flow, for example, in an easy-to-understand manner.
- the liquid refrigerant tends to be biased to the downstream side, and the liquid refrigerant is distributed at a ratio of 1:2:3 from the upstream side of the left side refrigerant flow path.
- the liquid refrigerant is returned to the right side refrigerant flow path by the second partition plate 6, the liquid refrigerant is distributed from the downstream side of the right side refrigerant flow path at a ratio of 3:4:5.
- the sum of the liquid refrigerant distribution ratios becomes equal when viewed in the flow path cross section, improving the uneven distribution of the distribution. Further, the range in which the refrigerant distribution performance can be improved can be expanded.
- the flow condition with the flow mode of the separated flow is described as an example, but the present invention is not limited to this, and any flow mode and flow conditions such as an annular flow and a churn flow may be used. Also, the effect of improving distribution can be expected.
- the flow path closing plate 12 is provided at the position closer to the one side surface than the orifice 5 on the one side surface side, and is the same as the second partition plate 6.
- a gap is provided between the side surface and the side surface facing the side surface.
- the refrigerant distribution is deteriorated due to the refrigerant colliding with the downstream side surface lid 9 on the downstream side, and the refrigerant distribution is deteriorated when the flow mode is separated flow. Can be suppressed. Further, even if the distribution ratios of the orifices 5 on the respective refrigerant flow paths are uneven, the sum of the liquid refrigerant distribution ratios becomes equal when viewed in the flow path cross section, and the uneven distribution of the distribution can be improved. The range in which the refrigerant distribution performance can be improved can be expanded.
- FIG. 24 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on Embodiment 6 of this invention.
- the second partition plate 6 is composed of two plates. Specifically, an upstream second partition plate 6a (hereinafter, also referred to as a first plate) that partitions the refrigerant flow passage in the width direction is provided in the region on the upstream side of the refrigerant distributor 200. Further, a downstream second partition plate 6b (hereinafter, also referred to as a second plate) that partitions the refrigerant flow passage in the width direction is provided in a region on the downstream side of the refrigerant distributor 200.
- an upstream second partition plate 6a hereinafter, also referred to as a first plate
- a downstream second partition plate 6b hereinafter, also referred to as a second plate
- a part of the right side refrigerant flow path, specifically, the right side refrigerant flow path, between the upstream side second partition plate 6a and the downstream side second partition plate 6b is spaced apart from them.
- a closing plate 12 is provided. Then, since the refrigerant flows through the gap provided between the upstream side second partition plate 6a and the downstream side second partition plate 6b and the flow path closing plate 12, as shown by the arrow in FIG. It circulates in the left and right refrigerant flow paths with the downstream side.
- FIG. 25 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on the 1st modification of Embodiment 6 of this invention.
- the second partition plate 6 may be composed of one plate instead of two plates. In this case, the flow path closing plate 12 is not provided. Further, gaps are provided between the second partition plate 6 and the upstream side surface lid 8 and between the second partition plate 6 and the downstream side surface lid 9, respectively.
- the relationship between the gap L5 between the second partition plate 6 and the upstream side surface lid 8 and the gap L6 between the second partition plate 6 and the downstream side surface lid 9 is L5. ⁇ L6 is preferable.
- FIG. 26 is an example of the front schematic diagram of the longitudinal cross section of the heat exchanger 100 of the heat exchanger 100 which concerns on the 2nd modification of Embodiment 6 of this invention.
- the circulation channel is formed by the gap, but the present invention is not limited to this.
- a part of the second partition plate 6 is used instead of the gap.
- a circulation channel may be formed by the first left and right through holes 16 and the second left and right through holes 17 which are opened.
- the second partition plate 6 is composed of the first plate arranged on the one side surface side and the second plate arranged on the side surface side opposite to the one side surface. Has been done. Gaps are provided between the first plate and the second plate, between the one side face and the first plate, and between the side face facing the one side face and the second plate. Further, the flow path closing plate 12 is arranged in the gap between the first plate and the second plate with a gap therebetween.
- the heat exchanger 100 it is possible to cause a circulating flow when the flow rate of the refrigerant is large, and it is possible to suppress the deviation of the liquid refrigerant at the collision part or the like. Further, even if the refrigerant distributor 200 is bent in an L shape, deterioration of refrigerant distribution due to the bending can be suppressed.
- the second partition plate 6 is provided with a gap between one side surface and a side surface opposite to the one side surface.
- the gap between the second partition plate 6 and the side surface facing the one side surface is larger than the gap between the second partition plate 6 and the one side surface.
- the second partition plate 6 is provided from one side surface to the side surface facing the one side surface, and the second partition plate 6 has one side surface and one side surface. Openings through which the refrigerant passes are formed on the opposite side surfaces. The opening formed on the side surface opposite to the one side surface is larger than the opening formed on the one side surface.
- the circulating flow can be stabilized.
- Embodiment 7 a seventh embodiment of the present invention will be described, but the description of the same parts as those of the first to sixth embodiments will be omitted, and the same or corresponding parts as those of the first to sixth embodiments will be designated by the same reference numerals. ..
- FIG. 27 is an example of the plane schematic diagram of the cross section of the refrigerant distributor 200 of the heat exchanger 100 which concerns on Embodiment 7 of this invention.
- the orifice 5 is formed by the slit 20 in the first partition plate 4, and the slit 20 is formed on each of the left and right refrigerant flow paths.
- the gas-liquid two-phase refrigerant flowing through the inflow pipe 10 is distributed to the left and right flow paths at the upstream end of the second partition plate 6. Then, it passes through the slits 20 provided at the upper part of each flow path and is sprayed.
- FIG. 28 is an example of the side surface schematic of the longitudinal cross section of the heat exchanger 100 which concerns on the modification of Embodiment 7 of this invention.
- the size, shape, position, etc. of the slit 20 are not limited, but the slit 20 is formed so as to reach both ends of the first partition plate 4. Then, as shown in FIG. 28, the number of parts can be reduced with the extruded material and the refrigerant distributor 200 can be formed, so that the manufacturing cost can be reduced.
- brazing can be performed integrally by forming the first partition plate 4, the header outer pipe upper plate 3, the header outer pipe bottom plate 2, the upstream side cover 8 and the downstream side cover 9 with a clad material. Becomes
- the orifice 5 is formed by the slit 20.
- the slits 20 are formed so as to reach both ends of the first partition plate 4. According to the heat exchanger 100 according to the seventh embodiment, the manufacturing cost can be reduced.
- FIG. 29 is an example of the front schematic diagram of the longitudinal cross section of the heat exchanger 100 which concerns on Embodiment 8 of this invention.
- the heat exchanger 100 according to Embodiment 8 as shown in FIG. 29, one end of each of the plurality of flat tubes 1 is connected to the refrigerant distributor 200 in the vertical direction, and the other end thereof is connected to the other end.
- the portion is connected to the gas header 300 in the vertical direction.
- the refrigerant distributor 200 is arranged below the flat pipe 1, the gas header 300 is arranged above the flat pipe 1, and the refrigerant distributor 200 is located upstream and the gas header 300 is arranged relative to the flow of the refrigerant. It will be on the downstream side.
- corrugated fins 7 are provided between the adjacent flat tubes 1 and are joined to each other on the outer tube surface of the flat tubes 1.
- the fins of the heat exchanger 100 are described as the corrugated fins 7 in the eighth embodiment, the present invention is not limited to this and may be another type of fin such as a plate fin. May be.
- an outflow pipe 22 through which the refrigerant flows is connected to one end of the header portion 21 of the gas header 300 so as to penetrate therethrough. It should be noted that if the outflow pipe 22 is provided at a remote position on the opposite side of the inflow pipe 10, the balance of pressure loss approaches evenly, and the refrigerant distribution performance is likely to be improved.
- the refrigerants heat-exchanged in the flat tubes 1 merge at the header portion 21 and flow out from the outflow pipe 22.
- FIG. 30 is an example of a schematic side view of a vertical cross section of the heat exchanger 100 according to the first modification of the eighth embodiment of the present invention.
- the white arrow in FIG. 30 indicates the flow of wind passing through the heat exchanger 100, and the black arrow indicates the flow of refrigerant.
- the gas header 300 is arranged on the upper side of the flat tube 1 and the refrigerant distributor 200 is arranged on the lower side of the flat tube 1, but as shown in FIG. 30, the gas header 300 is also arranged on the refrigerant distributor 200.
- the flat tube 1 may be arranged below the flat tube 1.
- the row header 301 is arranged on the upper side of the flat tube 1.
- two flat tubes 1 are arranged side by side in the width direction of the heat exchanger 100. Both ends of the two rows of the flat tubes 1 arranged in the width direction are connected to the row header 301.
- the other end of the leeward flat tube 1 of the two rows of the flat tubes 1 is connected to the refrigerant distributor 200, and the other end of the upwind flat tube 1 is the gas header. Connected to 300. Then, the refrigerant flowing through the flat tubes 1 arranged on the leeward side is folded back by the row-passage header 301 and flows through the flat tubes 1 arranged on the windward side.
- the flow path through the flat tube 1 becomes long and the pressure loss in the refrigerant distributor 200 becomes relatively small, so that the refrigerant distribution can be improved.
- the refrigerant distributor 200 is arranged on the leeward side, and the gas header 300 is arranged on the windward side.
- the outer shape of the gas header 300 is circular as shown in FIG. 30, but the shape is not limited to this.
- the insertion length of the flat tube 1 into the gas header 300 may be different from that of the flat tube 1 due to the brazing property of the flat tube 1. It tends to be longer than the insertion length into the refrigerant distributor 200. Therefore, the pressure loss in the flow path on the gas header 300 side increases due to the influence of the insertion length of the flat tube 1, and it is better to suppress it.
- FIG. 31 is an example of the side surface schematic of the longitudinal cross section of the heat exchanger 100 which concerns on the 2nd modification of Embodiment 8 of this invention.
- the white arrow indicates the flow of wind passing through the heat exchanger 100
- the black arrow indicates the flow of refrigerant.
- the outer shape of the gas header 300 may be the same as that of the refrigerant distributor 200, and the height of the gas header 300 may be the same as that of the refrigerant distributor 200. With such a structure, the number of places where the air passing through the heat exchanger 100 collides with the gas header 300 or the refrigerant distributor 200 is reduced, so that an increase in air resistance can be suppressed. Further, by making the outer shape of the gas header 300 the same as that of the refrigerant distributor 200, the parts can be made common.
- the heat exchanger 100 includes the gas header 300 in which the refrigerants heat-exchanged in the heat transfer tubes join, and the row header 301 that relays the refrigerant distributor 200 and the gas header 300.
- the heat transfer tubes are arranged in two rows in the width direction of the refrigerant distributor 200. Further, both of the two rows of heat transfer tubes have upper ends connected to the row-passage header 301, and one of the two rows of heat transfer tubes has a lower end connected to the refrigerant distributor 200. The other end is connected to the gas header 300 at the lower end.
- the flow path flowing through the flat tube 1 becomes long and the pressure loss in the refrigerant distributor 200 becomes relatively small, so that the refrigerant distribution can be improved. .. Further, in the heat exchanger 100, when the flat tubes 1 are arranged in a plurality of rows in the width direction, the refrigerant distributor 200 is arranged on the leeward side, and the gas header 300 is arranged on the windward side. By doing so, the temperature difference between the air and the refrigerant can be easily obtained due to the effect of the counterflow, so that the heat exchange efficiency can be improved.
- FIG. 32 is a diagram showing an example of a refrigerant circuit included in an air conditioning apparatus equipped with the heat exchanger 100 according to Embodiment 9 of the present invention.
- the solid line arrow in FIG. 32 indicates the flow of the refrigerant during the heating operation, and the broken line arrow indicates the flow of the refrigerant during the cooling operation.
- the heat exchanger 100 described in the first to eighth embodiments is installed in the indoor unit.
- the refrigerant circuit included in the air conditioner includes an indoor unit including a compressor 26, a fan 27 and a heat exchanger 400, an outdoor unit including an expansion valve 28, a fan 32 and a heat exchanger 100, An accumulator 33 is sequentially connected by pipes 29, 30, 31, 34 and 35.
- refrigerant flowing through the refrigerant circuit examples include low-pressure refrigerants such as olefin-based refrigerants (R1234yf, R1234ze(E), etc.), propane, DME (dimethyl ether), and mixed refrigerants obtained by adding these to one of the components. Further, non-azeotropic mixed refrigerants having different boiling points can be mentioned.
- low-pressure refrigerants such as olefin-based refrigerants (R1234yf, R1234ze(E), etc.
- propane propane
- DME dimethyl ether
- the refrigerant becomes high-temperature and high-pressure gas refrigerant by the compressor 26.
- the gas refrigerant flows into the heat exchanger 400.
- the heat exchanger 400 that functions as a condenser, the gas refrigerant exchanges heat with the air supplied by the fan 27 and condenses to become a high-pressure liquid refrigerant.
- the liquid refrigerant is then decompressed by the expansion valve 28, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows into the heat exchanger 100 including the refrigerant distributor 200.
- the gas-liquid two-phase refrigerant is a heat exchanger 100 that functions as an evaporator, is appropriately distributed by the refrigerant distributor 200, heat-exchanges with the air supplied by the fan 32, and evaporates to become a gas refrigerant.
- the refrigerant flows through the heat exchanger 100 as a vertically rising flow.
- the refrigerant flows in the heat exchanger 100 as a vertical upward flow, so that the flow of the gas-liquid two-phase refrigerant inside the refrigerant distributor 200 can be made a horizontal flow that is hardly affected by gravity, and the refrigerant distribution Can be improved.
- the gas refrigerant flows into the compressor 26 again via the accumulator 33.
- the opening degree of the expansion valve 28, the refrigerant charging amount, and the rotation speed of the compressor 26 may be adjusted.
- the flow state of the refrigerant flowing through the refrigerant distributor 200 can be changed to the flow state of the refrigerant in which the gas refrigerant mostly flows near the pipe center, for example, an annular flow or a churn flow, and the improvement range of the refrigerant distribution can be widened. can do.
- the dryness of the inlet of the refrigerant distributor 200 may be controlled in the range of 0.10 to 0.20, preferably 0.15 to 0.30.
- the refrigerant becomes high-temperature and high-pressure gas refrigerant by the compressor 26.
- the gas refrigerant flows into the heat exchanger 100 including the refrigerant distributor 200.
- the gas refrigerant is heat-exchanged with the air supplied by the fan 27 in the heat exchanger 100 functioning as a condenser and condensed to become a high-pressure liquid refrigerant.
- the liquid refrigerant is then decompressed by the expansion valve 28, becomes a low-temperature low-pressure gas-liquid two-phase refrigerant, and flows into the heat exchanger 400.
- the gas-liquid two-phase refrigerant exchanges heat with the air supplied by the fan 27 to evaporate in the heat exchanger 400 functioning as an evaporator, and becomes a gas refrigerant to flow into the compressor 26 again via the accumulator 33. ..
- the switching between the cooling operation and the heating operation has been described by simplifying it by reversing the refrigerant flow.
- the switching between the cooling operation and the heating operation is performed using a four-way valve or the like. May be.
- the compressor 26, the condenser, the expansion valve 28, and the evaporator are connected by the pipes 29, 30, 31, 34, and 35, and the refrigerant circuit in which the refrigerant flows is formed.
- the heat exchanger 100 described in any of Embodiments 1 to 8 is mounted on a condenser or an evaporator.
- Embodiment 10 the tenth embodiment of the present invention will be described, but the description of the same parts as those of the first to ninth embodiments will be omitted, and the same or corresponding parts as those of the first to ninth embodiments will be designated by the same reference numerals. ..
- FIG. 33 is a diagram showing an example of a refrigerant circuit included in an air conditioning apparatus equipped with the heat exchanger 100 according to Embodiment 10 of the present invention.
- the solid line arrow in FIG. 33 indicates the flow of the refrigerant during the heating operation, and the broken line arrow indicates the flow of the refrigerant during the cooling operation.
- the heat exchanger 100 described in the first to eighth embodiments is installed in the indoor unit.
- the refrigerant circuit included in the air conditioner includes, as shown in FIG. 33, an indoor unit including a compressor 26, a fan 27 and a heat exchanger 400, an expansion valve 28, a fan 32, a heat exchanger 100, and a subcool heat.
- An outdoor unit including an exchanger 500 and an accumulator 33 are sequentially connected by pipes 29, 30, 31, 34 and 35.
- the subcool heat exchanger 500 is provided on the downstream side of the heat exchanger 100 in the refrigerant flow direction during the cooling operation.
- the gas refrigerant is cooled in the heat exchanger 100 during the cooling operation, and a low degree of dryness is achieved, so that heat transfer of the refrigerant having a reduced flow velocity can be improved, so that the cooling performance is improved. Can be improved.
- the number of flat tubes of the subcool heat exchanger 500 is preferably smaller than that of the heat exchanger 100. By doing so, the flow rate of the refrigerant can be increased and the cooling performance can be improved.
- the subcool heat exchanger 500 is defined as x1, x2, and x3, respectively, at the inlet dryness of the refrigerant distributor 200 in the heating 100% load operation, the heating 50% load operation, and the heating 25% load operation. ..
- the dryness becomes large under the condition that the flow rate of the refrigerant is small, and the refrigerant distribution in a wide flow range is achieved. Can be improved.
- the subcool heat exchanger 500 is provided downstream of the heat exchanger 100 in the refrigerant flow direction during the cooling operation.
- the gas refrigerant is cooled by the heat exchanger 100 during the cooling operation to be in a state of low dryness, and heat transfer of the refrigerant having a reduced flow velocity can be improved. Therefore, the cooling performance can be improved.
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Abstract
Description
図1は、本発明の実施の形態1に係る熱交換器100の縦断面の側面概略図の一例である。図2は、本発明の実施の形態1の変形例に係る熱交換器100の縦断面の側面概略図の一例である。図3は、本発明の実施の形態1に係る熱交換器100の縦断面の正面概略図の一例である。
気液二相冷媒は、流入管10から冷媒分配器200に流入し、第1仕切り板4とヘッダー外管底板2とで形成される第2空間37である冷媒流路を下流側面フタ9側に向かって流動する。そして、冷媒は、その過程において、オリフィス5にて順次、第1仕切り板4とヘッダー外管上板3とヘッダー外管底板2とで形成される第1空間36に噴霧される。噴霧された冷媒は、隣り合う扁平管1の間に形成された空間で攪拌され、変形例の場合においては、左右のオリフィス5から噴霧された気液冷媒が均質となり、左右のオリフィス5の分配偏りが抑制された状態で、複数の扁平管1に分配される。その後、冷媒は、扁平管1を流れる過程で外部空気と熱交換し、蒸発しながら流動する。
図4に示すように、冷媒流路が単層構造である場合、気液二相冷媒が扁平管1の差込孔3aから冷媒分配器200の内部に差し込まれた部分と衝突し、縮小した流路を冷媒が通過する過程において大きな流体抵抗が発生する。さらには、冷媒が扁平管1を通過する際には、流路が拡大するため、急拡大に伴う拡大流体抵抗が発生する。
以下、本発明の実施の形態2について説明するが、実施の形態1と重複するものについては説明を省略し、実施の形態1と同じ部分または相当する部分には同じ符号を付す。
本実施の形態2に係る熱交換器100では、図5および図6に示すように、冷媒分配器200の上流側面フタ8側に、第1仕切り板4とヘッダー外管底板2とで形成される第2空間37である冷媒流路を幅方向に仕切る第2仕切り板6が設けられている。
気液二相冷媒は、流入管10から冷媒分配器200に流入し、第1仕切り板4と第2仕切り板6とヘッダー外管底板2とで形成される第2空間37である冷媒流路を下流側面フタ9側に向かって流動する。そして、冷媒は、その過程において、オリフィス5にて順次、第1仕切り板4とヘッダー外管上板3とヘッダー外管底板2とで形成される第1空間36に噴霧される。噴霧された冷媒は、隣り合う扁平管1の間に形成された空間で攪拌され、左右のオリフィス5から噴霧された気液冷媒が均質となり、左右のオリフィス5の分配偏りが抑制された状態で、複数の扁平管1に分配される。その後、冷媒は、扁平管1を流れる過程で外部空気と熱交換し、蒸発しながら流動する。
扁平管1は、アルミ、銅、または、ステンレスなどの金属製の伝熱管であり、図7に示すように、流路断面が扁平矩形形状を有している。
図10に示すように、冷媒分配器200の形状を、ヘッダー外管底板2がR形状を有する略D型の形状としてもよい。冷媒分配器200の形状をこのような形状とすることで、矩形形状の場合よりも、ヘッダー外管底板2の耐圧が向上し、その分、ヘッダー外管底板2の肉厚を減らすことができる。また、ヘッダー外管上板3は直線部分を有するため、扁平管1のロウ付け性がよく、扁平管1の差し込み量を少なくすることができる。
図11に示すように、冷媒分配器200のヘッダー外管上板3の形状を、歪曲された半円形状としてもよい。ヘッダー外管上板3をこのような形状とすることで、直線形状の場合よりも耐圧が向上し、その分、ヘッダー外管上板3の肉厚を減らすことができる。そして、ヘッダー外管上板3の肉厚をヘッダー外管底板2の肉厚よりも小さくすることができるため、材料を減らすことができる。
図12に示すように、オリフィス5は、隣り合う扁平管1の間のそれぞれに設けられており、かつ、第2仕切り板6により仕切られた左右の冷媒流路上にそれぞれ設けられている。また、第2仕切り板6の上流側の端部は、流入管10と間隔を空けて配置されており、流入管10から冷媒分配器200の内部に流入した冷媒が、二つの流路に分かれるようになっている。なお、第2仕切り板6と流入管10とは距離Lだけ離れている。
流入管10を流動する気液二相冷媒は、第2仕切り板6の上流側の端部で左右の冷媒流路に分配される。そして、各冷媒流路の上部に設けられている複数のオリフィス5を通過し、噴霧および攪拌されて、ヘッダー外管上板3と第1仕切り板4とヘッダー外管底板2とで形成された第1空間36に分配される。したがって、左右の冷媒流路を各々流れた冷媒は、ヘッダー外管上板3と第1仕切り板4とヘッダー外管底板2とで形成された第1空間36で合流する。このとき、オリフィス5の中心位置は隣り合う扁平管1の間に設けられており、複数の扁平管1の間に設けられると、左右の冷媒流路の冷媒が第1空間36で均質に混ざりやすく、冷媒分配性能の改善効果が大きい。このような構造とすることで、冷媒分配器200の内部での左右の液冷媒の偏りを改善することができる。
図14に示すように、冷媒分配器200が第1方向から第3方向に向かってL字形状(厳密にL字形状でなくてもよい)に屈曲された場合において、冷媒分配器200の内部に第2仕切り板6を設けることで、気液二相冷媒が屈曲部分を流動する際に、遠心力による液冷媒の偏りが抑制され、熱交換効率を改善することができる。また、図15に示すように、冷媒分配器200がL字形状に屈曲されていない場合においても、冷媒分配器200の内部に第2仕切り板6を設けることで、冷媒流路を流れる冷媒の流動様式が環状流またはチャーン流に遷移しやすくなる。そのため、オリフィス5の噴霧による冷媒分配性能の改善可能な範囲が広くなる。なお、本実施の形態2では、冷媒の流動様式は一例として環状流またはチャーン流の場合について説明しているが、これに限定されるものではない。例えば、スラグ流、層状流、または、気泡流などでもよい。
図16に示すように、第1仕切り板4に設けられている複数のオリフィス5の中心を、左右の各冷媒流路の中心線(C-C、D-D)よりも図16の矢印で示す遠心力が働く方向に対して反対の方向に偏心して配置するようにしてもよい。このような構造とすることで、屈曲部分での液冷媒が滞留した領域を避けることができ、液冷媒およびガス冷媒を安定してオリフィス5で噴出させることができるため、冷媒分配性能を改善することができる。
以下、本発明の実施の形態3について説明するが、実施の形態1および2と重複するものについては説明を省略し、実施の形態1および2と同じ部分または相当する部分には同じ符号を付す。
本実施の形態3に係る熱交換器100では、図18に示すように、冷媒分配器200の第1仕切り板4には複数のオリフィス5が設けられており、隣り合う扁平管1の間のそれぞれにおいて、左右の冷媒流路のうち一方の冷媒流路上にのみ設けられている。具体的には、右側の冷媒流路上には、オリフィス5が上流側面フタ8側にのみ設けられており、左側の冷媒流路上には、オリフィス5が下流側面フタ9側にのみ設けられている。
また、図19に示すように、右側の冷媒流路の途中、具体的には右側の冷媒流路において最も下流側のオリフィス5よりも下流側となる位置に冷媒流路を塞ぐ流路閉塞板12を設けてもよい。そうすることで、右側の冷媒流路の一部に冷媒が流れない封止空間13を形成することができ、冷媒充填量を抑制することができる。
以下、本発明の実施の形態4について説明するが、実施の形態1~3と重複するものについては説明を省略し、実施の形態1~3と同じ部分または相当する部分には同じ符号を付す。
本実施の形態4に係る熱交換器100では、図20に示すように、第2仕切り板6が下流側の領域にのみ設けられている。このような構造とすることで、冷媒の流量が大きく、流動様式が環状流またはチャーン流に遷移しやすい上流側で仕切りを用いずに冷媒を分配することができる。また、冷媒の流量が小さく、流動様式がスラグ流または波状流といった分離流に遷移する領域で第2仕切り板6および流路閉塞板12を設けることで、流路断面積が減り、冷媒の流速が上がる。そのため、流動様式を環状流またはチャーン流に遷移させやすく、かつ、維持しやすくすることができる。また、第2仕切り板6が存在する領域で冷媒分配器200をL字形状に屈曲したとしても、屈曲による冷媒分配の悪化も抑制することができる。
以下、本発明の実施の形態5について説明するが、実施の形態1~4と重複するものについては説明を省略し、実施の形態1~4と同じ部分または相当する部分には同じ符号を付す。
本実施の形態5に係る熱交換器100では、図22に示すように、右側の冷媒流路の途中、具体的には右側の冷媒流路において最も上流側のオリフィス5よりも上流側となる位置に冷媒流路を塞ぐ流路閉塞板12が設けられている。また、第2仕切り板6と下流側面フタ9との間に隙間が設けられており、冷媒分配器200の第2仕切り板6で仕切られた左右の冷媒流路が下流側で直列に接続されている。そして、図中の矢印で示すように下流側で気液二相冷媒が左側の冷媒流路から右側の冷媒流路へ折り返して流れるようになっている。このような構造とすることで、冷媒が下流側で下流側面フタ9に衝突することによる冷媒分配の悪化、および、流動様式が分離流となった場合の冷媒分配の悪化を抑制できる。
以下、本発明の実施の形態6について説明するが、実施の形態1~5と重複するものについては説明を省略し、実施の形態1~5と同じ部分または相当する部分には同じ符号を付す。
本実施の形態6に係る熱交換器100では、図24に示すように、第2仕切り板6が2枚の板で構成されている。具体的には、冷媒分配器200の上流側の領域に、冷媒流路を幅方向に仕切る上流側第2仕切り板6a(以下、第1板とも称する)が設けられている。また、冷媒分配器200の下流側の領域に、冷媒流路を幅方向に仕切る下流側第2仕切り板6b(以下、第2板とも称する)が設けられている。また、右側の冷媒流路の一部、具体的には右側の冷媒流路において上流側第2仕切り板6aと下流側第2仕切り板6bとの間には、それらと間隔を空けて流路閉塞板12が設けられている。そして、上流側第2仕切り板6aおよび下流側第2仕切り板6bと流路閉塞板12との間に設けられた隙間を冷媒が流れるため、図24の矢印で示すように冷媒が上流側と下流側とで左右の冷媒流路を循環するようになっている。
なお、図25に示すように、第2仕切り板6は、2枚の板ではなく1枚の板で構成されていてもよい。この場合、流路閉塞板12は設けない。また、第2仕切り板6と上流側面フタ8との間、および、第2仕切り板6と下流側面フタ9との間に、それぞれ隙間が設けられている。なお、循環流を安定させるために、第2仕切り板6と上流側面フタ8との間の隙間L5と、第2仕切り板6と下流側面フタ9との間の隙間L6との関係は、L5<L6であることが好ましい。
なお、本実施の形態6では、循環流路を隙間で形成しているが、これに限定されるものではなく、例えば図26に示すように、隙間の代わりに第2仕切り板6の一部が開口した第1左右貫通孔16と第2左右貫通孔17とで循環流路を形成してもよい。
以下、本発明の実施の形態7について説明するが、実施の形態1~6と重複するものについては説明を省略し、実施の形態1~6と同じ部分または相当する部分には同じ符号を付す。
本実施の形態7に係る熱交換器100では、図27に示すように、第1仕切り板4では、オリフィス5がスリット20で形成されており、スリット20は、左右の冷媒流路上それぞれに形成されている。そして、流入管10を流動する気液二相冷媒は、第2仕切り板6の上流側の端部で左右の流路に分配される。そして、各流路の上部に設けられているスリット20を通過し、噴霧される。
なお、本実施の形態7では、スリット20の大きさ、形状、および、位置などを限定するものではないが、スリット20を第1仕切り板4の両端に至るように形成する。そうすると、図28に示すように、押し出し材で部品点数を少なく、冷媒分配器200を形成することができるため、製造時のコストを低減できる。また、これらの第1仕切り板4、ヘッダー外管上板3、とヘッダー外管底板2、上流側面フタ8、および、下流側面フタ9をクラッド材で形成することで、一体でロウ付けが可能となる。
以下、本発明の実施の形態8について説明するが、実施の形態1~7と重複するものについては説明を省略し、実施の形態1~7と同じ部分または相当する部分には同じ符号を付す。
本実施の形態8に係る熱交換器100では、図29に示すように、複数の扁平管1の一方の端部が冷媒分配器200に対して鉛直方向に接続されており、もう一方の端部がガスヘッダー300に対して鉛直方向に接続されている。そして、冷媒分配器200は扁平管1の下側に配置され、ガスヘッダー300は扁平管1の上側に配置されており、冷媒の流れに対して冷媒分配器200は上流側、ガスヘッダー300は下流側となる。
なお、図31に示すように、ガスヘッダー300の外管形状を冷媒分配器200と同様の形状とし、ガスヘッダー300の高さも冷媒分配器200と同じ高さにしてもよい。このような構造とすることで、熱交換器100を通過する空気がガスヘッダー300または冷媒分配器200に衝突する箇所が少なくなるため、空気抵抗の増大を抑制することができる。また、ガスヘッダー300の外管形状を冷媒分配器200と同じ形状とすることで、部品を共通化することができる。
以下、本発明の実施の形態9について説明するが、実施の形態1~8と重複するものについては説明を省略し、実施の形態1~8と同じ部分または相当する部分には同じ符号を付す。
冷媒は圧縮機26によって高温高圧のガス冷媒となる。その後、ガス冷媒は、熱交換器400に流入する。ガス冷媒は、凝縮器として機能する熱交換器400で、ファン27によって供給された空気と熱交換して凝縮し、高圧の液冷媒となる。液冷媒はその後、膨張弁28によって減圧され、低温低圧の気液二相冷媒となり、冷媒分配器200を備える熱交換器100に流入する。
冷媒は圧縮機26によって高温高圧のガス冷媒となる。その後、ガス冷媒は、冷媒分配器200を備える熱交換器100に流入する。ガス冷媒は、凝縮器として機能する熱交換器100で、ファン27によって供給された空気と熱交換して凝縮し、高圧の液冷媒となる。液冷媒はその後、膨張弁28によって減圧され、低温低圧の気液二相冷媒となり、熱交換器400に流入する。気液二相冷媒は、蒸発器として機能する熱交換器400で、ファン27によって供給された空気と熱交換して蒸発し、ガス冷媒となってアキュムレータ33を介して再び圧縮機26に流入する。
以下、本発明の実施の形態10について説明するが、実施の形態1~9と重複するものについては説明を省略し、実施の形態1~9と同じ部分または相当する部分には同じ符号を付す。
Claims (28)
- 複数の伝熱管と、
第1方向に間隔を空けて形成され、前記伝熱管の端部が第2方向から差し込まれる差込孔を有する筒形状の冷媒分配器と、を備えた熱交換器であって、
前記冷媒分配器は、
内部を前記伝熱管の端部が差し込まれる側の第1空間と前記伝熱管の端部が差し込まれない側の前記第1空間よりも容積が大きい第2空間とに仕切る第1仕切り板と、
一側面に設けられ、前記第2空間に気液二相冷媒を流入させる流入管と、を備え、
前記伝熱管は、前記第1空間において端部が前記第1仕切り板と間隔が空くように前記差込孔に差し込まれており、
前記第1仕切り板には、隣り合う前記伝熱管の間のそれぞれに対応して、前記第1空間と前記第2空間とを連通させるオリフィスが設けられている
熱交換器。 - 前記第1方向、前記第2方向、および、第3方向は、それぞれ互いに直交している
請求項1に記載の熱交換器。 - 前記オリフィスは、隣り合う前記伝熱管の間のそれぞれに対応して、前記オリフィスが前記第3方向に間隔を空けて複数設けられている
請求項2に記載の熱交換器。 - 前記冷媒分配器は、
前記第2空間を前記第3方向に仕切り、前記第2空間内に2つの冷媒流路を形成する第2仕切り板を備えている
請求項2または3に記載の熱交換器。 - 前記冷媒分配器は、
2つの前記冷媒流路のうち一方の前記冷媒流路の途中に、該冷媒流路を塞ぐ流路閉塞板が設けられている
請求項4に記載の熱交換器。 - 前記オリフィスは、隣り合う前記伝熱管の間のそれぞれにおいて、2つの前記冷媒流路のうち一方の前記冷媒流路上にのみ設けられており、一方の前記冷媒流路上では前記一側面に対向する側面側にのみ、もう一方の冷媒流路上では前記一側面側にのみ設けられている
請求項4または5に記載の熱交換器。 - 前記流路閉塞板は、最も前記一側面に対向する側面側の前記オリフィスよりも前記一側面に対向する側面側となる位置に設けられている
請求項5に従属する請求項6に記載の熱交換器。 - 前記第2仕切り板は、前記一側面に対向する側面側の領域にのみ設けられている
請求項4~7のいずれか一項に記載の熱交換器。 - 前記流路閉塞板は、最も前記一側面側の前記オリフィスよりも前記一側面側となる位置に設けられており、
前記第2仕切り板と前記一側面に対向する側面との間には隙間が設けられている
請求項5に記載の熱交換器。 - 前記第2仕切り板は、前記一側面側に配置された第1板と前記一側面に対向する側面側に配置された第2板とで構成されており、前記第1板と前記第2板との間、前記一側面と前記第1板との間、および、前記一側面に対向する側面と前記第2板との間に、それぞれ隙間が設けられており、
前記流路閉塞板は、前記第1板と前記第2板との間の隙間に、それらと間隔を設けて配置されている
請求項5に記載の熱交換器。 - 前記第2仕切り板は、前記一側面との間、および、前記一側面に対向する側面との間に、それぞれ隙間が設けられており、
前記第2仕切り板と前記一側面に対向する側面との間の隙間は、前記第2仕切り板と前記一側面との間の隙間よりも大きい
請求項4に記載の熱交換器。 - 前記第2仕切り板は、前記一側面から前記一側面に対向する側面にかけて設けられており、
前記第2仕切り板の前記一側面側および前記一側面に対向する側面側には、それぞれ冷媒が通過する開口が形成されており、
前記一側面に対向する側面側に形成された前記開口は、前記一側面側に形成された前記開口よりも大きい
請求項4に記載の熱交換器。 - 前記流入管と前記第2仕切り板とは間隔を空けて配置されている
請求項4~12のいずれか一項に記載の熱交換器。 - 前記流入管と前記第2仕切り板との間隔は、前記流入管の内径以上である
請求項4~13のいずれか一項に記載の熱交換器。 - 前記冷媒分配器は、L字形状に屈曲されている
請求項4~14のいずれか一項に記載の熱交換器。 - 前記冷媒分配器の前記第2空間は、前記第1方向よりも前記第3方向の方が長くなっている
請求項2~15のいずれか一項に記載の熱交換器。 - 前記第1方向は水平方向、前記第2方向は鉛直方向であり、前記第3方向は前記冷媒分配器の幅方向である請求項2~16のいずれか一項に記載の熱交換器。
- 前記差込孔は、前記第1方向よりも前記第3方向に長い形状を有している
請求項2~17のいずれか一項に記載の熱交換器。 - 前記伝熱管で熱交換した冷媒が合流するガスヘッダーと、
前記冷媒分配器と前記ガスヘッダーとの中継を行う列渡しヘッダーとを備え、
前記伝熱管が前記冷媒分配器の幅方向に2列に配置されており、
2列の前記伝熱管の両方は、上側の端部が前記列渡しヘッダーに接続されており、
2列の前記伝熱管のうち一方は、下側の端部が前記冷媒分配器に接続されており、もう一方は、下側の端部が前記ガスヘッダーに接続されている
請求項1~18のいずれか一項に記載の熱交換器。 - 前記オリフィスは、スリットで構成されている
請求項1~19のいずれか一項に記載の熱交換器。 - 前記オリフィスは、前記第1仕切り板の両端に至るように形成されている
請求項20に記載の熱交換器。 - 前記伝熱管は扁平管であり、隣り合う前記伝熱管の間にはコルゲートフィンが設けられている
請求項1~21のいずれか一項に記載の熱交換器。 - 前記冷媒分配器の前記第2空間の2つの冷媒流路のうち、一方の流路断面積の方がもう一方の流路断面積よりも大きい
請求項1~22のいずれか一項に記載の熱交換器。 - 圧縮機、凝縮器、膨張弁、および、蒸発器が配管で接続され、冷媒が流れる冷媒回路を備え、
前記凝縮器または前記蒸発器に請求項1~23のいずれか一項に記載の熱交換器を用いた
空気調和装置。 - 前記熱交換器を前記蒸発器と用いた場合、
前記伝熱管を冷媒が垂直上昇流として流動する
請求項24に記載の空気調和装置。 - 冷房運転を行う空気調和装置であって、
冷房運転時の冷媒流れ方向において、前記熱交換器の下流側にサブクール熱交換器が設けられている
請求項24または25に記載の空気調和装置。 - 前記冷媒回路を流れる冷媒として、沸点の異なる非共沸混合冷媒が用いられている
請求項24~26のいずれか一項に記載の空気調和装置。 - 前記冷媒回路を流れる冷媒として、オレフィン系冷媒、プロパン、DME、または、これらを成分の1つに加えた混合冷媒が用いられている
請求項24~26のいずれか一項に記載の空気調和装置。
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| PCT/JP2019/003823 WO2020161761A1 (ja) | 2019-02-04 | 2019-02-04 | 熱交換器およびこれを備えた空気調和装置 |
| CN201980088021.4A CN113330268B (zh) | 2019-02-04 | 2019-02-04 | 热交换器以及具备热交换器的空气调节装置 |
| US17/310,216 US12044480B2 (en) | 2019-02-04 | 2019-02-04 | Heat exchanger and air-conditioning apparatus including the same |
| EP19914635.8A EP3922941B1 (en) | 2019-02-04 | 2019-02-04 | Heat exchanger and air-conditioner provided with same |
| JP2019542740A JP6664558B1 (ja) | 2019-02-04 | 2019-02-04 | 熱交換器、熱交換器を備えた空気調和装置、および熱交換器を備えた冷媒回路 |
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| PCT/JP2019/003823 WO2020161761A1 (ja) | 2019-02-04 | 2019-02-04 | 熱交換器およびこれを備えた空気調和装置 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12215932B2 (en) * | 2020-07-14 | 2025-02-04 | Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | Heat exchanger |
| US12241666B2 (en) * | 2020-07-29 | 2025-03-04 | York Guangzhou Air Conditioning And Refrigeration Co., Ltd. | Evaporator |
| CN112944951A (zh) * | 2021-04-01 | 2021-06-11 | 哈尔滨理工大学 | 一种微通道换热器及分流结构 |
| WO2024166276A1 (ja) * | 2023-02-09 | 2024-08-15 | 三菱電機株式会社 | 空気調和装置 |
| GB2640100A (en) * | 2023-02-09 | 2025-10-08 | Mitsubishi Electric Corp | Air-conditioning device |
| WO2024241381A1 (ja) * | 2023-05-19 | 2024-11-28 | 日本キヤリア株式会社 | 熱交換器および冷凍サイクル装置 |
| JP7756851B1 (ja) * | 2025-04-10 | 2025-10-20 | 三菱電機株式会社 | 冷凍サイクル装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US12044480B2 (en) | 2024-07-23 |
| EP3922941B1 (en) | 2026-03-04 |
| EP3922941A1 (en) | 2021-12-15 |
| EP3922941A4 (en) | 2022-02-16 |
| US20220316804A1 (en) | 2022-10-06 |
| JPWO2020161761A1 (ja) | 2021-02-18 |
| CN113330268B (zh) | 2023-05-16 |
| JP6664558B1 (ja) | 2020-03-13 |
| CN113330268A (zh) | 2021-08-31 |
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