US20230041168A1 - Heat exchanger of heat-source-side unit and heat pump apparatus including the heat exchanger - Google Patents

Heat exchanger of heat-source-side unit and heat pump apparatus including the heat exchanger Download PDF

Info

Publication number
US20230041168A1
US20230041168A1 US17/786,066 US202017786066A US2023041168A1 US 20230041168 A1 US20230041168 A1 US 20230041168A1 US 202017786066 A US202017786066 A US 202017786066A US 2023041168 A1 US2023041168 A1 US 2023041168A1
Authority
US
United States
Prior art keywords
heat
heat transfer
transfer tube
refrigerant
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/786,066
Other languages
English (en)
Inventor
Kazuaki Sakurai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAKURAI, KAZUAKI
Publication of US20230041168A1 publication Critical patent/US20230041168A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • 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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0417—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures
    • 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
    • F28F9/0275—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 branch pipes
    • 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
    • F28D2021/0071—Evaporators

Definitions

  • the present disclosure relates to a heat exchanger of a heat-source-side unit that can suppress the growth of ice frozen at the lowermost portion of a heat exchange unit, and to a heat pump apparatus including the heat exchanger.
  • a heat-source-side unit of a heat pump apparatus includes a heat exchanger that causes heat exchange between air and refrigerant.
  • the heat exchanger includes heat exchange units each of which includes a large number of heat transfer tubes.
  • the heat exchange units are disposed on a windward side and a leeward side, thus being arranged in two rows.
  • a configuration is used where the heat exchange units are arranged in an air passage direction in three or more rows.
  • the heat-source-side unit of the heat pump apparatus When the heat-source-side unit of the heat pump apparatus is used as an evaporator, the evaporating temperature of refrigerant becomes lower than the temperature of surrounding air and hence, moisture in the air forms condensation on the surface of fins, and condensation water flows through the fins and collects in the lower portion of the heat exchanger and on the bottom plate of a housing. When outside air drops below freezing point, the condensation water collecting in the lower portion of the heat exchanger and on the bottom plate of the housing may freeze. The frozen ice may grow with time, thus damaging the lower portion of the heat exchanger. Therefore, it is desirable that the heat-source-side unit have a configuration that can suppress the growth of ice by melting the frozen ice.
  • a heat exchanger of a heat-source-side unit of a refrigerating device disclosed in Patent Literature 1 includes a large number of fins, a plurality of first heat transfer tubes, which are arranged in the vertical direction and form the first row, a plurality of second heat transfer tubes, which are arranged in the vertical direction and form the second row, a plurality of third heat transfer tubes, which are arranged in the vertical direction and form the third row, a liquid-side connecting pipe, a gas-side connecting pipe, and a flow divider configured to divide the flow of refrigerant.
  • the first heat transfer tubes are located on the windward side of the flow of outside air.
  • the third heat transfer tubes are located on the leeward side of the flow of outside air.
  • the second heat transfer tubes are located between the first heat transfer tubes and the third heat transfer tubes.
  • the first heat transfer tube located at the lowermost portion of the first row, the second heat transfer tube located at the lowermost portion of the second row, and the third heat transfer tube located at the lowermost portion of the third row are connected with each other to form a first flow passage.
  • the liquid-side connecting pipe is connected to the first heat transfer tube located at the lowermost portion of the first row.
  • the flow divider is connected to the third heat transfer tube located at the lowermost portion of the third row.
  • the flow divider divides, into four branch pipes, the flow of refrigerant that flows into the first flow passage from the liquid-side connecting pipe and then flows out from the first flow passage.
  • Remaining first heat transfer tubes, second heat transfer tubes, and third heat transfer tubes, that is, heat transfer tubes other than the first heat transfer tube, the second heat transfer tube, and the third heat transfer tube forming the first flow passage form four branch flow passages through which refrigerant that flows out from the plurality of respective branch pipes flows.
  • Refrigerant that flows out from the four branch flow passages flows into a gas-side header to merge together and, thereafter, flows out to the gas-side connecting pipe.
  • Patent Literature 1 Japanese Unexamined Patent Application Publication No. 2015-141009
  • the first heat transfer tube located at the lowermost portion of the first row, the second heat transfer tube located at the lowermost portion of the second row, and the third heat transfer tube located at the lowermost portion of the third row are connected with each other to form one flow passage.
  • Refrigerant at a relatively high temperature flows into the first heat transfer tube from the liquid-side connecting pipe, passes through the second heat transfer tube and the third heat transfer tube, and then flows into the flow divider.
  • the temperature of refrigerant flowing through the heat transfer tube located at the lowermost portion of the heat exchanger is higher than 0° C., it is possible to suppress freezing of the heat exchanger.
  • the temperature of refrigerant reduces due to pressure loss in pipes and heat exchange when refrigerant at a relatively high temperature flows into the first heat transfer tube from the liquid-side connecting pipe and then flows into the third heat transfer tube from the first heat transfer tube. Accordingly, there is a possibility that a sufficient effect for melting ice cannot be obtained.
  • the present disclosure has been made to solve the above-mentioned problems, and it is an object of the present disclosure to provide a heat exchanger of a heat-source-side unit that can suppress the growth of ice by melting the ice frozen at the lowermost portion of the heat exchange unit when the heat exchanger serves as an evaporator, and to provide a heat pump apparatus including the heat exchanger.
  • a heat exchanger of a heat-source-side unit includes: a heat exchange unit where heat transfer tube groups, each of which includes a plurality of heat transfer tubes arranged in a vertical direction, are provided in an air passage direction in at least three or more rows; a liquid-side connecting pipe forming an inlet or an outlet for refrigerant in a liquid phase or in a gas-liquid two phase; and a distributor configured to distribute the refrigerant to a plurality of refrigerant flow passages forming the heat exchange unit, wherein in at least two heat transfer tube groups of the heat transfer tube groups of the heat exchange unit, the liquid-side connecting pipe is connected to one end of a heat transfer tube located at least at a lowermost portion of each of the two heat transfer tube groups and the distributor is connected to the other end of the heat transfer tube.
  • a heat pump apparatus includes a refrigerant circuit through which refrigerant cycles, the refrigerant circuit being formed by connecting a compressor, a load-side heat exchanger, an expansion mechanism, and the above-mentioned heat exchanger of the heat-source-side unit in this order by a pipe.
  • the liquid-side connecting pipe is connected to one end of the heat transfer tube located at least at the lowermost portion of each of the two heat transfer tube groups and the distributor is connected to the other end of the heat transfer tube. Therefore, when the heat exchanger serves as an evaporator, it is possible to cause refrigerant at a relatively high temperature, which flows out from the liquid-side connecting pipe, to flow into the respective heat transfer tubes located at the lowermost portions. Accordingly, it is possible to suppress the growth of ice frozen at the lowermost portion of the heat exchange unit.
  • FIG. 1 is a refrigerant circuit diagram of a heat pump apparatus according to Embodiment 1.
  • FIG. 2 is a perspective view showing a heat-source-side unit of the heat pump apparatus according to Embodiment 1 with some components omitted.
  • FIG. 3 is an explanatory view schematically showing a heat-source-side heat exchanger of the heat pump apparatus according to Embodiment 1.
  • FIG. 4 is an explanatory view schematically showing a heat-source-side heat exchanger of a heat pump apparatus according to Embodiment 2.
  • FIG. 1 is a refrigerant circuit diagram of a heat pump apparatus according to Embodiment 1.
  • FIG. 2 is a perspective view showing a heat-source-side unit of the heat pump apparatus according to Embodiment 1 with some components omitted.
  • a heat pump apparatus 100 includes a heat-source-side unit 200 and a load-side unit 300 .
  • the heat pump apparatus 100 is used for performing air conditioning or for supplying hot water, for example.
  • the heat pump apparatus 100 includes a refrigerant circuit 400 through which refrigerant cycles.
  • the refrigerant circuit 400 is formed by connecting a compressor 10 , a flow switching device 11 , a heat-source-side heat exchanger 12 , an expansion mechanism 13 , and a load-side heat exchanger 14 in this order by a gas pipe 15 and a liquid pipe 16 .
  • the compressor 10 , the flow switching device 11 , the heat-source-side heat exchanger 12 , and the expansion mechanism 13 are provided to the heat-source-side unit 200 .
  • the load-side heat exchanger 14 is provided to the load-side unit 300 .
  • the compressor 10 , the flow switching device 11 , the heat-source-side heat exchanger 12 , and the expansion mechanism 13 are housed in a housing 201 forming an outer shell.
  • the compressor 10 and the heat-source-side heat exchanger 12 are provided to the upper surface of a bottom plate 201 a of the housing 201 .
  • the compressor 10 compresses sucked refrigerant into a high temperature and high pressure state, and discharges the refrigerant.
  • the compressor 10 may be a positive-displacement compressor configured to be able to vary an operating capacity and driven by a motor controlled by an inverter.
  • the flow switching device 11 is a four-way valve, for example, and has a function of switching a flow passage for refrigerant. Specifically, when the heat-source-side heat exchanger 12 serves as a condenser, the flow switching device 11 switches the refrigerant flow passage such that the refrigerant discharge side of the compressor 10 is connected with the gas side of the heat-source-side heat exchanger 12 and the refrigerant suction side of the compressor 10 is connected with the gas side of the load-side heat exchanger 14 .
  • the flow switching device 11 switches the refrigerant flow passage such that the refrigerant discharge side of the compressor 10 is connected with the gas side of the load-side heat exchanger 14 and the refrigerant suction side of the compressor 10 is connected with the gas side of the heat-source-side heat exchanger 12 .
  • the flow switching device 11 may be formed by combining two-way valves or three-way valves, for example.
  • the heat-source-side heat exchanger 12 serves as a condenser, thus causing refrigerant discharged from the compressor 10 to exchange heat with air.
  • the heat-source-side heat exchanger 12 serves as an evaporator, thus causing refrigerant that flows out from the expansion mechanism 13 to exchange heat with air.
  • the heat-source-side heat exchanger 12 sucks outdoor air by using fans, causes the air to exchange heat with refrigerant, and then discharges the air to the outside of a room.
  • the expansion mechanism 13 causes refrigerant flowing through the refrigerant circuit to expand by reducing the pressure of the refrigerant.
  • the expansion mechanism 13 may be an electronic expansion valve where an opening degree is variably controlled.
  • the load-side heat exchanger 14 serves as an evaporator, thus causing refrigerant that flows out from the expansion mechanism 13 to exchange heat with air.
  • the load-side heat exchanger 14 serves as a condenser, thus causing refrigerant discharged from the compressor 10 to exchange heat with air.
  • the load-side heat exchanger 14 sucks indoor air by using the fans, causes the air to exchange heat with refrigerant, and then supplies the air to the inside of the room.
  • FIG. 3 is an explanatory view schematically showing the heat-source-side heat exchanger of the heat pump apparatus according to Embodiment 1.
  • An outline arrow in FIG. 3 shows an air passage direction X.
  • the heat-source-side heat exchanger 12 includes a heat exchange unit 1 , a distributor 5 , and a liquid-side connecting pipe 6 .
  • heat transfer tube groups 3 A to 3 C, each of which includes a plurality of heat transfer tubes 3 arranged in the vertical direction, are provided in the air passage direction X in three rows.
  • the distributor 5 distributes refrigerant to a plurality of refrigerant flow passages ( 4 a to 4 c ) forming the heat exchange unit 1 .
  • the liquid-side connecting pipe 6 forms an inlet or an outlet for refrigerant in a liquid phase or in a gas-liquid two phase.
  • the heat exchange unit 1 is of a fin tube type (cross fin type) that includes a plurality of fins 2 and the heat transfer tube groups ( 3 A to 3 C), each of which includes the plurality of heat transfer tubes 3 arranged in the vertical direction.
  • the fins 2 are made of a metal material, such as an aluminum alloy, and are in contact with the heat transfer tubes 3 to increase a heat transfer area.
  • the fins 2 are arranged parallel to each other at intervals in a direction substantially orthogonal to the air passage direction X such that plate-like surfaces of the fins 2 are substantially parallel to each other.
  • the heat transfer tube groups ( 3 A to 3 C) include a first-row heat transfer tube group 3 A, a second-row heat transfer tube group 3 B, and a third-row heat transfer tube group 3 C arranged in this order from the leeward side, and are arranged along the air passage direction X in three rows.
  • the first-row heat transfer tube group 3 A includes a plurality of heat transfer tubes ( 30 a to 30 e ) arranged in the vertical direction.
  • the second-row heat transfer tube group 3 B includes a plurality of heat transfer tubes ( 31 a to 31 e ) arranged in the vertical direction.
  • the third-row heat transfer tube group 3 C includes a plurality of heat transfer tubes ( 32 a to 32 e ) arranged in the vertical direction.
  • the heat transfer tube groups ( 3 A to 3 C) may be provided in the air passage direction X in three or more rows. For the sake of convenience of illustration, only five heat transfer tubes in each row are shown. However, the actual heat transfer tube group includes five or more heat transfer tubes
  • Each heat transfer tube 3 is made of a metal material, such as an aluminum alloy, and a flow passage, through which refrigerant flows, is formed in the heat transfer tube 3 .
  • the liquid-side connecting pipe 6 is connected to one end of the heat transfer tube 30 a and to one end of the heat transfer tube 32 a and the distributor 5 is connected to the other end of the heat transfer tube 30 a and to the other end of the heat transfer tube 32 a .
  • the heat transfer tube 30 a is located at the lowermost portion of the first-row heat transfer tube group 3 A.
  • the heat transfer tube 32 a is located at the lowermost portion of the third-row heat transfer tube group 3 C.
  • the heat transfer tube 30 a which is located at the lowermost portion of the first-row heat transfer tube group 3 A, is connected with the heat transfer tube 31 a , which is located at the lowermost portion of the second-row heat transfer tube group 3 B, so that the liquid-side connecting pipe 6 is connected to the heat transfer tube 30 a , and the distributor 5 is connected to the heat transfer tube 31 a .
  • the heat transfer tube 32 a which is located at the lowermost portion of the third-row heat transfer tube group 3 C, the liquid-side connecting pipe 6 is connected to one end of the heat transfer tube 32 a and the distributor 5 is connected to the other end of the heat transfer tube 32 a .
  • heat transfer tubes in adjacent rows in the air passage direction X are connected with each other, thus forming a plurality of refrigerant flow passages ( 4 a to 4 c ) arranged in the vertical direction.
  • respective heat transfer tubes ( 32 b to 32 e ) in the third-row heat transfer tube group 3 C are connected to the distributor 5
  • respective heat transfer tubes ( 30 b to 30 e ) in the first-row heat transfer tube group 3 A are connected to the gas pipe 15 .
  • the respective heat transfer tubes ( 30 b to 30 e ) in the first-row heat transfer tube group 3 A may be connected with the gas pipe 15 via gas connecting pipes.
  • the heat exchange unit 1 it is sufficient for the heat exchange unit 1 to have a configuration where, in two heat transfer tube groups ( 3 A to 3 C), the liquid-side connecting pipe 6 is connected to one end of the heat transfer tube ( 30 a to 32 a ) located at least at the lowermost portion of each of the two heat transfer tube groups ( 3 A to 3 C), and the distributor 5 is connected to the other end of the heat transfer tube ( 30 a to 32 a ).
  • the heat exchange unit 1 is not limited to the configuration shown in the drawing.
  • the heat exchange unit 1 may be configured such that the liquid-side connecting pipe 6 is connected to one end of the heat transfer tube 30 a , which is located at the lowermost portion of the first-row heat transfer tube group 3 A, and to one end of the heat transfer tube 30 b , which is located at the lowermost portion of the second-row heat transfer tube group 3 B, and the distributor 5 is connected to the other end of the heat transfer tube 30 a and to the other end of the heat transfer tube 30 b .
  • the heat exchange unit 1 may be configured such that the liquid-side connecting pipe 6 and the distributor 5 are connected to each of the heat transfer tubes ( 30 a , 31 a , 32 a ), which are located at the lowermost portions, and to the heat transfer tubes ( 30 b , 31 b , 32 b ), which are located at the second lowermost portions, or to the heat transfer tubes ( 30 c , 31 c , 32 c ), which are located at the third lowermost portions.
  • the heat exchange unit 1 may be configured such that the liquid-side connecting pipe 6 and the distributor 5 are connected to each of all heat transfer tubes ( 30 a to 30 c , 31 a to 31 c , 32 a to 32 c ), which are located at the lowermost portions, the second lowermost portions, and the third lowermost portions.
  • a configuration may be adopted where the liquid-side connecting pipe 6 and the distributor 5 are connected to each heat transfer tube, or a configuration may be adopted where heat transfer tubes disposed adjacent to each other in the vertical direction or in the air passage direction X are connected with each other and the liquid-side connecting pipe 6 and the distributor 5 are connected to each set of connected heat transfer tubes.
  • the description has been made for heat transfer tubes located at the second and third lowermost portions. However, the same applies for heat transfer tubes located at the fourth lowermost portions or higher portions.
  • the liquid-side connecting pipe 6 connects the liquid pipe 16 with the heat transfer tubes ( 30 a , 32 a ).
  • the liquid-side connecting pipe 6 may be a two-branch pipe, for example.
  • the liquid-side connecting pipe 6 may be a portion of the liquid pipe 16 , or may be a part separated from the liquid pipe 16 .
  • the distributor 5 includes a distributor body 50 , inflow pipes 51 , and a plurality of fine pipes 52 .
  • the inflow pipes 51 connect the distributor body 50 with the heat transfer tubes ( 30 a , 32 a ).
  • the plurality of respective fine pipes 52 are connected to the distributor body 50 .
  • Each fine pipe 52 may be a capillary tube, for example.
  • Each of the fine pipes 52 is connected to one end of each of the heat transfer tubes ( 32 b to 32 e ), which are heat transfer tubes that do not include the lowermost heat transfer tube of the heat transfer tubes ( 32 a to 32 e ) in the third-row heat transfer tube group 3 C.
  • Refrigerant flows into the distributor body 50 via the inflow pipe 51 and is then distributed to the respective fine pipes 52 by the distributor body 50 , thus being reduced in pressure by the fine pipes 52 and, thereafter, flows into the respective refrigerant flow passages ( 4 a to 4 c ).
  • the distributor 5 is not limited to the configuration shown in the drawing. Provided that the distributor 5 can distribute refrigerant to the plurality of refrigerant flow passages ( 4 a to 4 c ) forming the heat exchange unit 1 , other mode may be adopted.
  • the evaporating temperature of refrigerant becomes lower than the temperature of surrounding air and hence, moisture in the air forms condensation on the surface of the fins 2 , and condensation water flows through the fins 2 and collects in the lower portion of the heat exchanger 12 and on the upper surface of the bottom plate 201 a of the housing 201 .
  • condensation water collecting in the lower portion of the heat exchanger 12 and on the upper surface of the bottom plate 201 a of the housing 201 may freeze. The frozen ice may grow with time, thus damaging the lower portion of the heat exchanger 12 .
  • the heat exchanger 12 of the heat-source-side unit 200 includes the heat exchange unit 1 , the liquid-side connecting pipe 6 , and the distributor 5 .
  • the heat transfer tube groups ( 3 A to 3 C), each of which includes the plurality of heat transfer tubes 3 arranged in the vertical direction, are provided in the air passage direction X in at least three or more rows.
  • the liquid-side connecting pipe 6 forms an inlet or an outlet for refrigerant in a liquid phase or in a gas-liquid two phase.
  • the distributor 5 is configured to distribute refrigerant to the plurality of refrigerant flow passages ( 4 a to 4 c ) forming the heat exchange unit 1 .
  • the liquid-side connecting pipe 6 is connected to one end of the heat transfer tube ( 30 a , 31 a , 32 a ) located at least at the lowermost portion of the two heat transfer tube group ( 3 A, 3 C), and the distributor 5 is connected to the other end of the heat transfer tube ( 30 a , 31 a , 32 a ).
  • the heat exchanger 12 of the heat-source-side unit 200 it is possible to cause refrigerant at a relatively high temperature, which flows out from the liquid-side connecting pipe 6 , to flow into the heat transfer tubes ( 30 a , 31 a , 32 a ) located at the lowermost portion under the condition of the outside air being below freezing point. Accordingly, melting of ice can be promoted and hence, it is possible to suppress the growth of ice frozen at the lowermost portion of the heat exchange unit 1 .
  • FIG. 4 is an explanatory view schematically showing a heat-source-side heat exchanger of a heat pump apparatus according to Embodiment 2.
  • An outline arrow in FIG. 4 shows the air passage direction X.
  • Components substantially equal to the corresponding components of the heat exchanger 12 of the heat-source-side unit 200 described in Embodiment 1 are given the same reference symbols, and the description of such components will be omitted when appropriate.
  • the liquid-side connecting pipe 6 is connected to one end of each of the heat transfer tubes ( 30 a , 31 a , 32 a ), which are located at the lowermost portions of the first-row heat transfer tube group 3 A, the second-row heat transfer tube group 3 B, and the third-row heat transfer tube group 3 C, and the distributor 5 is connected to the other end of each of the heat transfer tubes ( 30 a , 31 a , 32 a ).
  • the liquid-side connecting pipe 6 is a three-branch pipe that connects the liquid pipe 16 with the heat transfer tubes ( 30 a , 31 a , 32 a ).
  • the heat-source-side heat exchanger 12 it is possible to cause refrigerant at a relatively high temperature flowing through the liquid-side connecting pipe 6 to directly flow into all of the heat transfer tubes ( 30 a , 31 a , 32 a ), which are located at the lowermost portion. Accordingly, melting of ice can be uniformly promoted over a wide range and hence, freezing of the heat exchange unit 1 can be suppressed.
  • the heat exchange unit 1 may be configured such that the liquid-side connecting pipe 6 and the distributor 5 are connected to each of the heat transfer tubes ( 30 a , 31 a , 32 a ), which are located at the lowermost portions, and to the heat transfer tubes ( 30 b , 31 b , 32 b ), which are located at the second lowermost portions, or the heat transfer tubes ( 30 c , 31 c , 32 c ), which are located at the third lowermost portions.
  • the heat exchange unit 1 may be configured such that the liquid-side connecting pipe 6 and the distributor 5 are connected to all of the heat transfer tubes ( 30 a to 30 c , 31 a to 31 c , 32 a to 32 c ), which are located at the lowermost portions, the second lowermost portions, and the third lowermost portions.
  • a configuration may be adopted where the liquid-side connecting pipe 6 and the distributor 5 are connected to each heat transfer tube, or a configuration may be adopted where heat transfer tubes disposed adjacent to each other in the vertical direction or in the air passage direction X are connected with each other and the liquid-side connecting pipe 6 and the distributor 5 are connected to each set of connected heat transfer tubes.
  • the heat exchanger 12 of the heat-source-side unit 200 and the heat pump apparatus 100 are not limited to the configurations of the above-mentioned Embodiments.
  • the heat exchanger 12 of the heat-source-side unit 200 and the heat pump apparatus 100 are not limited to the above-mentioned components, and may include other components.
  • the heat exchange unit 1 is not limited to the configuration of the fin tube type (cross fin type) shown in the drawing, and other mode may be adopted.
  • the heat exchanger 12 of the heat-source-side unit 200 and the heat pump apparatus 100 include variations to which design changes or applications are regularly added by those who are skilled in the art without departing from the technical concept.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Central Heating Systems (AREA)
US17/786,066 2020-02-27 2020-02-27 Heat exchanger of heat-source-side unit and heat pump apparatus including the heat exchanger Pending US20230041168A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/007885 WO2021171446A1 (ja) 2020-02-27 2020-02-27 熱源側ユニットの熱交換器及び該熱交換器を備えたヒートポンプ装置

Publications (1)

Publication Number Publication Date
US20230041168A1 true US20230041168A1 (en) 2023-02-09

Family

ID=77490045

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/786,066 Pending US20230041168A1 (en) 2020-02-27 2020-02-27 Heat exchanger of heat-source-side unit and heat pump apparatus including the heat exchanger

Country Status (6)

Country Link
US (1) US20230041168A1 (zh)
JP (1) JP7275372B2 (zh)
CN (1) CN115103987A (zh)
AU (1) AU2020431093B2 (zh)
DE (1) DE112020006824T5 (zh)
WO (1) WO2021171446A1 (zh)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0443756Y2 (zh) * 1985-08-02 1992-10-15
JP3634467B2 (ja) * 1995-09-21 2005-03-30 三洋電機株式会社 冷凍装置
JP3888000B2 (ja) * 1999-08-27 2007-02-28 株式会社日立製作所 空気調和機
JP2003090653A (ja) * 2001-09-13 2003-03-28 Denso Corp ヒートポンプ式給湯機
JP4814907B2 (ja) * 2008-05-29 2011-11-16 日立アプライアンス株式会社 冷凍サイクル装置
CN101907376B (zh) * 2009-06-02 2012-07-25 江森自控楼宇设备科技(无锡)有限公司 用于制冷系统中的制冷剂的分配装置
WO2013190830A1 (ja) * 2012-06-18 2013-12-27 パナソニック株式会社 熱交換器及び空気調和機
KR20150047027A (ko) * 2013-10-23 2015-05-04 엘지전자 주식회사 히트 펌프
JP6179414B2 (ja) * 2014-01-30 2017-08-16 ダイキン工業株式会社 冷凍装置の熱源ユニットの熱交換器、および、それを備えた熱源ユニット
US10591192B2 (en) * 2015-02-27 2020-03-17 Hitachi-Johnson Controls Air Conditioning, Inc. Heat exchange apparatus and air conditioner using same
JP6573484B2 (ja) * 2015-05-29 2019-09-11 日立ジョンソンコントロールズ空調株式会社 熱交換器
JP6788763B2 (ja) * 2018-05-09 2020-11-25 日立ジョンソンコントロールズ空調株式会社 熱交換器、室内機、室外機、及び空気調和機

Also Published As

Publication number Publication date
AU2020431093A1 (en) 2022-09-08
DE112020006824T5 (de) 2022-12-15
JPWO2021171446A1 (zh) 2021-09-02
AU2020431093B2 (en) 2023-12-14
JP7275372B2 (ja) 2023-05-17
CN115103987A (zh) 2022-09-23
WO2021171446A1 (ja) 2021-09-02

Similar Documents

Publication Publication Date Title
CN112204312B (zh) 空气调节装置的室外机及空气调节装置
US10054376B2 (en) Heat exchanger and air-conditioning apparatus
US11333401B2 (en) Refrigeration cycle apparatus
EP3156752B1 (en) Heat exchanger
US20230128871A1 (en) Heat exchanger, outdoor unit, and refrigeration cycle device
US11629896B2 (en) Heat exchanger and refrigeration cycle apparatus
US20230041168A1 (en) Heat exchanger of heat-source-side unit and heat pump apparatus including the heat exchanger
US11384996B2 (en) Heat exchanger and refrigeration cycle apparatus
US11802719B2 (en) Refrigeration cycle apparatus
US20220260277A1 (en) Air conditioner
CN114729793B (zh) 传热管以及热交换器
CN110285603B (zh) 热交换器和使用其的制冷系统
CN114811768A (zh) 空调机及热交换器
EP4368918A1 (en) Heat exchanger and refrigeration cycle device
US20230194180A1 (en) Heat exchanger and refrigeration cycle device
WO2017072866A1 (ja) 空気調和装置及び空気調和装置の室外機
EP4382831A1 (en) Refrigeration cycle device
JP7146077B2 (ja) 熱交換器及び空気調和装置
EP4166858A1 (en) Outdoor unit for air conditioning device
EP4155645A1 (en) Heat exchanger and air conditioner comprising said heat exchanger
EP4368919A1 (en) Heat exchanger and refrigeration cycle device
WO2020194442A1 (ja) 熱交換器ユニット及び冷凍サイクル装置
CN114812010A (zh) 空调机及热交换器

Legal Events

Date Code Title Description
AS Assignment

Owner name: MITSUBISHI ELECTRIC CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAKURAI, KAZUAKI;REEL/FRAME:060224/0761

Effective date: 20220512

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER