WO2017170139A1 - Dispositif d'échange de chaleur, système de réfrigération et procédé d'échange de chaleur - Google Patents

Dispositif d'échange de chaleur, système de réfrigération et procédé d'échange de chaleur Download PDF

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Publication number
WO2017170139A1
WO2017170139A1 PCT/JP2017/011771 JP2017011771W WO2017170139A1 WO 2017170139 A1 WO2017170139 A1 WO 2017170139A1 JP 2017011771 W JP2017011771 W JP 2017011771W WO 2017170139 A1 WO2017170139 A1 WO 2017170139A1
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Prior art keywords
heat exchange
gas
phase refrigerant
refrigerant
liquid
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PCT/JP2017/011771
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English (en)
Japanese (ja)
Inventor
有仁 松永
吉川　実
寿人 佐久間
雅人 矢野
明日華 松葉
貴文 棗田
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日本電気株式会社
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Priority to JP2018509186A priority Critical patent/JP6888616B2/ja
Priority to US16/089,994 priority patent/US20190145667A1/en
Publication of WO2017170139A1 publication Critical patent/WO2017170139A1/fr

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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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F28D1/0233—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 air flow channels
    • F28D1/024—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 air flow channels with an air driving element
    • 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
    • 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
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • 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
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05341—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
    • 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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/18—Optimization, e.g. high integration of refrigeration components
    • 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 exchange device and a heat exchange method, and more particularly to a heat exchange device and a heat exchange method used in a refrigeration system.
  • Refrigeration systems that transport heat by changing the state of refrigerant are widely used in air conditioning equipment and the like.
  • An example of such a refrigeration system is described in Patent Document 1.
  • the related refrigeration system described in Patent Document 1 is an application of a refrigeration cycle to an automotive air conditioner.
  • the associated refrigeration system has a compressor, a condenser, a receiver, an internal heat exchanger, an expansion valve, an evaporator, and a control valve.
  • the compressor compresses the refrigerant.
  • the condenser condenses the compressed refrigerant by heat exchange with the outside air.
  • the receiver separates the condensed refrigerant into gas and liquid and stores excess refrigerant in the refrigeration cycle.
  • the expansion valve is a temperature type expansion valve, and expands and expands the liquid refrigerant separated into gas and liquid.
  • an evaporator evaporates the expanded refrigerant
  • the internal heat exchanger has a high-pressure passage through which high-temperature and high-pressure refrigerant flows to the expansion valve and a low-pressure passage through which low-pressure refrigerant flows to the compressor, and a high-temperature refrigerant flowing through the high-pressure passage and a low-temperature refrigerant flowing through the low-pressure passage. Heat exchange between them.
  • the control valve adjusts the degree of superheat of the low-pressure refrigerant sent from the internal heat exchanger to the compressor.
  • the double pipe connected between the expansion valve and the control valve functions as an internal heat exchanger.
  • the outer pipe is concentrically arranged so as to surround the inner pipe.
  • the control valve adjusts to reduce the degree of superheat of the low-pressure refrigerant sent from the internal heat exchanger to the compressor, so that the refrigerant compressed by the compressor can be reduced.
  • the abnormal temperature rise can be suppressed.
  • heat exchange is performed between a low-pressure, low-temperature gas-phase refrigerant and a high-pressure, high-temperature liquid-phase refrigerant.
  • the enthalpy of the gas phase refrigerant can be increased.
  • the efficiency of the compressor can be increased.
  • the heat transfer coefficient between the liquid phase refrigerant and the wall surface becomes small.
  • the length of the double pipe provided in the related refrigeration system is lengthened or bent, It is necessary to have a complicated structure that generates a flow.
  • the wall surface in contact with the liquid phase refrigerant needs to have a complicated structure in which turbulent flow is generated even with a liquid phase refrigerant having a small flow rate.
  • An object of the present invention is a heat exchange apparatus that solves the problem that the efficiency of the entire refrigeration system is lowered when the heat exchange performance of the gas-phase refrigerant and the liquid-phase refrigerant is improved in the refrigeration system, which is the above-described problem. And providing a heat exchange method.
  • the heat exchange device of the present invention includes a refrigerant supply means for supplying a liquid refrigerant at a first temperature and a gas-phase refrigerant at a second temperature in one circulation system, and a liquid-phase refrigerant and a gas-phase refrigerant.
  • a plurality of heat exchange means each configured to perform heat exchange, a gas phase refrigerant is circulated so that the gas phase refrigerant flows in parallel through the plurality of heat exchange means, and the liquid phase refrigerant has a plurality of heat exchange means.
  • a refrigerant circulation means for circulating the liquid-phase refrigerant so as to flow in series.
  • a liquid phase refrigerant having a first temperature and a gas phase refrigerant having a second temperature are supplied in one circulation system, the gas phase refrigerants are paralleled and circulated, and the liquid phase refrigerants are serially connected.
  • the heat exchange is performed between the gas-phase refrigerant and the liquid-phase refrigerant, which are circulated in a state and paralleled.
  • the heat exchange performance between the gas-phase refrigerant and the liquid-phase refrigerant can be improved, and the efficiency of the entire refrigeration system can be improved.
  • FIG. 1 is a schematic diagram showing a configuration of a heat exchange device 100 according to the first embodiment of the present invention.
  • the heat exchange device 100 according to the present embodiment includes a refrigerant supply unit (refrigerant supply unit) 110, a plurality of heat exchangers (heat exchange unit) 120, and a refrigerant circulation unit (refrigerant circulation unit) 130.
  • refrigerant supply unit refrigerant supply unit
  • heat exchange unit heat exchangers
  • refrigerant circulation unit refrigerant circulation unit 130.
  • the refrigerant supply unit 110 supplies the liquid refrigerant at the first temperature and the gas-phase refrigerant at the second temperature in one circulation system.
  • the heat exchanger 120 is configured to perform heat exchange between the liquid phase refrigerant and the gas phase refrigerant.
  • the refrigerant circulation unit 130 circulates the gas-phase refrigerant so that the gas-phase refrigerant flows in the plurality of heat exchangers 120 in parallel, and the liquid-phase refrigerant flows in the plurality of heat exchangers 120 in series. Circulate phase refrigerant.
  • the liquid-phase refrigerant and the gas-phase refrigerant are supplied in one circulation system. Since the refrigerant flows in a circulating manner, the same mass flow rate flows between the liquid-phase refrigerant and the gas-phase refrigerant from the law of conservation of mass. However, since the density of the gas-phase refrigerant is several hundredths of the density of the liquid-phase refrigerant, the volume flow rate of the gas-phase refrigerant is several hundred times larger than that of the liquid-phase refrigerant. Therefore, the flow rate of the gas-phase refrigerant is larger than that of the liquid-phase refrigerant, causing a large pressure loss in the gas-phase refrigerant. On the other hand, a liquid phase refrigerant has a lower volume flow rate than a gas phase refrigerant, and therefore has a low flow rate, and therefore has a low heat transfer coefficient.
  • the refrigerant circulation section 130 causes the gas-phase refrigerant to branch and flow through the plurality of heat exchangers 120 in parallel.
  • the gas phase refrigerants branched in parallel have a small flow rate per one heat exchanger 120, so the flow velocity in the heat exchanger 120 is small and the pressure loss is reduced.
  • coolant becomes small, since a contact area increases by passing through the several heat exchanger 120, the reduction
  • the liquid-phase refrigerant flows through the plurality of heat exchangers 120 in series, the liquid-phase refrigerant having the same flow rate flows through each heat exchanger 120. Therefore, even if it is a case where it is a structure provided with the several heat exchanger 120, since the fall of a flow rate does not arise, the heat transfer rate of a liquid phase refrigerant
  • coolant does not fall.
  • the flow velocity of a liquid phase refrigerant is about several hundredths of the flow velocity of a gaseous phase refrigerant.
  • the heat exchange apparatus 100 includes a plurality of heat exchangers 120, and the gas-phase refrigerant circulates in parallel and the liquid-phase refrigerant circulates in series.
  • the heat exchange device 100 of the present embodiment the heat exchange performance between the gas-phase refrigerant and the liquid-phase refrigerant can be improved, and the efficiency of the entire refrigeration system can be improved.
  • the heat exchanger 120 a fin-and-tube heat exchanger can be typically used.
  • An example of the configuration of such a heat exchanger 120 is shown in FIGS. 2A and 2B.
  • 2A is a front view
  • FIG. 2B is a side view.
  • the heat exchanger 120 includes a tube (heat transfer tube) 121 through which the liquid refrigerant R11 flows, a fin (heat transfer plate) 122 connected to the outer periphery of the tube 121, and in contact with the gas phase refrigerant R21. It can be set as the structure provided with.
  • a gas phase refrigerant has a smaller heat transfer coefficient than a liquid phase refrigerant when the flow rates are equal.
  • the contact area of the gas-phase refrigerant can be increased, so that the heat exchange performance can be improved.
  • the louver on the fin 122 the flow of the gas-phase refrigerant can be disturbed to generate a turbulent flow. Thereby, even if the length of the gas phase flow path is short and the flow velocity is small, the heat transfer rate can be improved.
  • the flow rate of the liquid phase refrigerant increases by passing through the small-diameter channels connected in series, thereby improving the heat transfer rate. Therefore, the heat exchange performance of the heat exchanger 120 can also be improved by this.
  • the liquid refrigerant at the first temperature and the gas-phase refrigerant at the second temperature are supplied in one circulation system.
  • the gas-phase refrigerant is circulated in parallel, and the liquid-phase refrigerant is circulated in series.
  • heat exchange is performed between the gas-phase refrigerant and the liquid-phase refrigerant that are arranged in parallel.
  • the gas-phase refrigerant is circulated in parallel and the liquid-phase refrigerant is circulated in series.
  • the heat exchange method of the present embodiment it is possible to improve the heat exchange performance between the gas-phase refrigerant and the liquid-phase refrigerant and improve the efficiency of the entire refrigeration system.
  • FIG. 3A and 3B show the configuration of the heat exchange device 200 according to the second embodiment of the present invention.
  • FIG. 3B is a partial view of the heat exchange device 200 as seen from the direction of arrow A in FIG. 3A.
  • the heat exchange apparatus 200 includes a refrigerant supply unit (refrigerant supply unit) 210, a plurality of heat exchangers (heat exchange unit) 220, a first gas phase pipe 231, a second gas phase pipe 232, a liquid phase. It has a pipe 241 and a liquid phase connecting pipe 242.
  • the first gas phase pipe 231, the second gas phase pipe 232, and the liquid phase connection pipe 242 are connected to the refrigerant supply unit 210, and the gas phase refrigerant R 21 is connected to the first gas phase pipe 231 and the liquid phase connection pipe.
  • the liquid phase refrigerant R11 is supplied from the refrigerant supply unit 210 to 242.
  • the first gas phase pipe 231, the second gas phase pipe 232, the liquid phase pipe 241, and the liquid phase connection pipe 242 constitute a refrigerant circulation means.
  • the heat exchanger 220 includes a gas-phase refrigerant inflow portion 221 into which the gas-phase refrigerant flows, a gas-phase refrigerant outflow portion 222 from which the gas-phase refrigerant flows out, a liquid-phase refrigerant inflow portion 223 into which the liquid-phase refrigerant flows, and a liquid-phase refrigerant A liquid-phase refrigerant outflow portion 224 that flows out is provided.
  • the first gas phase pipe 231 connects the plurality of gas phase refrigerant inflow portions 221 and the refrigerant supply unit 210 respectively provided in the plurality of heat exchangers 220.
  • the second gas phase pipe 232 connects the plurality of gas phase refrigerant outflow portions 222 and the refrigerant supply unit 210 respectively provided in the plurality of heat exchangers 220.
  • the liquid phase pipe 241 includes a liquid phase refrigerant inflow portion 223 provided in one heat exchanger of the plurality of heat exchangers 220 and a liquid phase refrigerant outflow portion provided in another heat exchanger adjacent to the one heat exchanger. 224 is connected.
  • the liquid phase connection pipe 242 connects the liquid phase refrigerant inflow portion 223 and the refrigerant supply portion 210 provided in the heat exchanger at one end of the plurality of heat exchangers 220. Further, the liquid phase connection pipe 242 connects the liquid phase refrigerant outflow part 224 and the refrigerant supply part 210 provided in the heat exchanger at the other end of the plurality of heat exchangers 220.
  • the heat exchange device 200 includes a plurality of heat exchangers 220, and is configured to exchange heat between the gas-phase refrigerant and the liquid-phase refrigerant supplied from the refrigerant supply unit 210.
  • a low-temperature (second temperature) and low-pressure gas-phase refrigerant before entering the compressor of the refrigeration system is used as the gas-phase refrigerant
  • a high-temperature (first first) before entering the expansion valve is used as the liquid-phase refrigerant.
  • Temperature) and a high-pressure liquid phase refrigerant can be used.
  • the heat exchange device 200 can be used in a refrigeration system that uses a gas phase refrigerant and a liquid phase refrigerant in one circulation system.
  • the heat exchanger 220 two kinds of refrigerant fluids in different states respectively pass through the spaces, and heat is transferred from the high-pressure and high-temperature liquid phase refrigerant to the low-pressure and low-temperature gas-phase refrigerant.
  • the first gas-phase pipe 231 and the second gas-phase pipe 232 in which the gas-phase refrigerant flows are branched into a plurality and connected in parallel with the plurality of heat exchangers 220. Thereby, the branched gaseous-phase refrigerant
  • coolant passes each heat exchanger 220, respectively.
  • the liquid-phase refrigerant passes through each heat exchanger through a liquid-phase tube 241 connecting a plurality of heat exchangers 220 in series.
  • the heat exchange apparatus 200 may be configured such that a plurality of heat exchangers 220, a first gas phase pipe 231 and a second gas phase pipe 232 are connected as shown in FIG. 3A. it can. That is, the order in which the plurality of heat exchangers 220 are connected to the first gas phase pipe 231 and the order in which the plurality of heat exchangers 220 are connected to the second gas phase pipe 232 are connected to the refrigerant supply unit 210. It can be set as the structure connected so that it might become the same order seeing from the side to be performed.
  • the present invention is not limited thereto, and a plurality of heat exchangers 220, a first gas phase pipe 231 and a second gas phase pipe 232 may be connected as shown in FIG. That is, in the heat exchange device 201, the order in which the plurality of heat exchangers 220 are connected to the first gas phase pipe 231 and the order in which the plurality of heat exchangers 220 are connected to the second gas phase pipe 232 are: It can be set as the structure connected so that it might become reverse order seeing from the side connected with the refrigerant
  • the heat exchanger 220 ⁇ / b> A disposed on the side close to the outflow side of the refrigerant supply unit 210 of the first gas phase tube 231 is connected to the second gas phase tube 232.
  • the refrigerant supply unit 210 is disposed on the far side from the inflow side.
  • a plurality of heat exchangers 220 can be sequentially arranged.
  • the pressure of the fluid is generally higher on the upstream (upstream) side, so the fluid tends to flow on the upstream side.
  • the fluid flowing in the pipe is generally easier to flow on the downstream (downstream) side near the outflow port because it is easier to discharge.
  • the heat exchanger 220 ⁇ / b> A connected to the upstream (upstream) side of the first gas phase pipe 231 is on the side far from the outlet of the second gas phase pipe 232. Connected to (Kawakami). Therefore, in the heat exchanger 220A, the gas-phase refrigerant R21 tends to flow into the heat exchanger 220A, but is difficult to flow out.
  • the heat exchanger 220 ⁇ / b> B connected to the downstream (downstream) side of the first gas phase pipe 231 is connected to the side (downstream) near the outflow port of the second gas phase pipe 232. Therefore, in the heat exchanger 220B, the gas-phase refrigerant R21 does not easily flow into the heat exchanger 220B, but easily flows out.
  • the liquid refrigerant at the first temperature and the gas-phase refrigerant at the second temperature are supplied in one circulation system.
  • the gas-phase refrigerant is circulated in parallel, and the liquid-phase refrigerant is circulated in series.
  • heat exchange is performed between the gas-phase refrigerant and the liquid-phase refrigerant that are arranged in parallel.
  • the order of the parallel gas phase refrigerants when performing heat exchange with the liquid phase refrigerant and the order of the parallel gas phase refrigerants when circulating after performing the heat exchange are the same order. There can be a certain configuration. In addition, the order of the parallel gas phase refrigerants when performing heat exchange with the liquid phase refrigerant and the order of the parallel gas phase refrigerants when circulating after performing the heat exchange are reversed. It is good.
  • the heat exchange performance between the gas-phase refrigerant and the liquid-phase refrigerant can be improved, and the efficiency of the entire refrigeration system can be improved. it can.
  • the heat exchange device includes a refrigerant supply unit (refrigerant supply unit), a plurality of heat exchangers (heat exchange unit), and a refrigerant circulation unit (refrigerant circulation unit).
  • the heat exchange device according to the present embodiment differs from the heat exchange device 100 according to the first embodiment in the configuration of the heat exchanger and the refrigerant circulation unit.
  • FIG. 5A and 5B show a configuration of the heat exchange device 300 according to the present embodiment.
  • 5A is a side sectional view and
  • FIG. 5B is a top view.
  • Each heat exchanger 320 included in the heat exchange device 300 includes a gas phase refrigerant passage surface 321 through which the gas phase refrigerant R21 passes, a liquid phase refrigerant inflow portion 322 into which the liquid phase refrigerant flows in, and a liquid phase refrigerant through which the liquid phase refrigerant flows out.
  • An outflow portion 323 is provided.
  • the refrigerant circulation unit includes a gas phase tube 330, a plurality of partition plates 350, a liquid phase tube 341, and a liquid phase connection tube 342.
  • the vapor phase tube 330 includes a plurality of heat exchangers 320, and the vapor phase refrigerant R21 flows through the inside of the vapor phase tube 330.
  • the plurality of partition plates 350 are respectively located on the side where the gas-phase refrigerant R21 flows in the gas-phase refrigerant passage surfaces 321 provided in the plurality of heat exchangers 320, respectively.
  • the liquid phase pipe 341 includes a liquid phase refrigerant inflow portion 322 included in one heat exchanger of the plurality of heat exchangers 320, and a liquid phase refrigerant outflow included in another heat exchanger adjacent to the one heat exchanger.
  • the part 323 is connected.
  • the liquid phase connection pipe 342 connects the liquid phase refrigerant inflow portion 322 and the refrigerant supply portion 310 provided in the heat exchanger 320A at one end of the plurality of heat exchangers 320, and the other end of the plurality of heat exchangers 320.
  • the liquid-phase refrigerant outflow part 323 and the refrigerant supply part 310 included in the heat exchanger 320B are connected.
  • the heat exchange apparatus 300 includes a plurality of heat exchangers 320 in a gas phase pipe 330 that is a pipe having an inner diameter capable of disposing a heat exchanger therein. Is arranged.
  • the gas phase refrigerant R21 flows in parallel into the heat exchangers 320 by the plurality of partition plates 350, and the liquid phase refrigerant is configured to flow in the plurality of heat exchangers 320 in series by the liquid phase pipe 341. It is.
  • the heat exchanger 320 a fin-and-tube heat exchanger can be typically used. Further, the cross-sectional shape of the gas phase tube 330 may be circular or polygonal.
  • the partition plate 350 provided between the heat exchangers 320 can separate the gas phase refrigerant region before passing through the heat exchanger 320 and the gas phase refrigerant region after passing through the heat exchanger 320.
  • the partition plate 350 is arranged to be inclined with respect to the flow direction of the gas-phase refrigerant R21, so that the gas-phase refrigerant R21 can pass through each heat exchanger 320. It is.
  • the heat exchange device 300 of the present embodiment it is possible to improve the heat exchange performance of the gas-phase refrigerant and the liquid-phase refrigerant and improve the efficiency of the entire refrigeration system. Furthermore, since it is possible to reduce the number of pipes for circulating the gas-phase refrigerant through the plurality of heat exchangers 320, the heat exchange device 300 can be reduced in size.
  • the heat exchanger 320 may be arranged such that the normal line of the gas-phase refrigerant passage surface 321 is substantially parallel to the flow direction of the gas-phase refrigerant R21 in the gas-phase pipe 330. it can. Not only this but the angle which the normal line of the gaseous-phase refrigerant
  • this angle was made into the angle which the normal line which goes to the side into which the gaseous-phase refrigerant
  • the angle formed by the normal line of the gas-phase refrigerant passage surface 321 and the normal line of the partition plate 350 may be a substantially right angle.
  • the normal line of the partition plate 350C among the plurality of partition plates 350 may be substantially parallel to the flow direction of the gas-phase refrigerant R21 in the gas-phase pipe 330.
  • the partition plate 350C is located on the side where the gas phase refrigerant R21 flows in the heat exchanger 320C located at the end on the side where the gas phase refrigerant R21 flows.
  • the gas-phase refrigerant first flows into the heat exchanger 320C located on the most upstream side (upstream) in the flow direction of the gas-phase refrigerant R21, a large amount of gas-phase refrigerant is likely to flow in.
  • the heat to be heat exchange is biased and the heat exchange performance is lowered.
  • the partition plate 350C is provided in front of the most upstream heat exchanger 320C, it is possible to prevent the gas-phase refrigerant from concentrating and flowing into the heat exchanger 320C. Therefore, it is possible to prevent the unevenness of heat in the plurality of heat exchangers 320 and improve the cooling performance.
  • the angle formed by the normal line of the gas-phase refrigerant passage surface 321 and the flow direction of the gas-phase refrigerant R21 in the gas-phase pipe 330 is substantially perpendicular. can do.
  • the angle formed by the normal line of the partition plate 350 and the flow direction of the gas-phase refrigerant R21 in the gas-phase pipe 330 may be substantially perpendicular. With such a configuration, it is possible to further reduce the cross-sectional area of the gas phase tube 330 that accommodates the plurality of heat exchangers 320.
  • FIG. 9 is a schematic diagram showing the configuration of the refrigeration system 1000 according to the present embodiment.
  • the refrigeration system 1000 includes a heat exchange device 1100, a heat receiving unit (heat receiving unit) 1200, a compressor (compression unit) 1300, a heat radiating unit (heat radiating unit) 1400, and an expansion valve (expansion unit) 1500.
  • any of the heat exchanging devices 100, 200, 201, 300, 301, 302 described in the first to third embodiments can be used. And it is set as the structure which the refrigerant
  • the heat receiving unit 1200 vaporizes the refrigerant liquid by receiving heat to generate a gas phase refrigerant.
  • the compressor 1300 compresses the gas-phase refrigerant to generate a high-pressure gas-phase refrigerant.
  • the heat radiating unit 1400 condenses the high-pressure gas-phase refrigerant by heat radiation to generate a liquid-phase refrigerant.
  • the expansion valve 1500 expands the liquid phase refrigerant to generate a low-pressure refrigerant liquid, and recirculates the refrigerant liquid to the heat receiving unit 1200.
  • a refrigerant circulation system is configured.
  • the gas-phase refrigerant supplied to the heat exchange device 1100 is a low-temperature (second temperature) and low-pressure gas-phase refrigerant before entering the compressor 1300.
  • the liquid phase refrigerant supplied to the heat exchange device 1100 is a high-temperature (first temperature) and high-pressure liquid-phase refrigerant before entering the expansion valve 1500.
  • the heat exchange device 1100 includes a plurality of heat exchangers, and the gas-phase refrigerant circulates in parallel and the liquid-phase refrigerant circulates in series.
  • the heat exchange device 1100 the heat exchange performance between the gas-phase refrigerant and the liquid-phase refrigerant can be improved without increasing the pressure loss of the gas-phase refrigerant. Therefore, even when the heat exchange performance is improved, it is not necessary to increase the work amount of the compressor 1300.
  • the efficiency of the entire refrigeration system can be improved.
  • Refrigerant supply means for supplying the liquid refrigerant at the first temperature and the gas-phase refrigerant at the second temperature in one circulation system, and heat exchange between the liquid-phase refrigerant and the gas-phase refrigerant
  • a plurality of heat exchanging means each configured to perform the operation, circulating the gas phase refrigerant so that the gas phase refrigerant flows in parallel through the plurality of heat exchanging means, and the liquid phase refrigerant
  • a refrigerant circulation means for circulating the liquid-phase refrigerant so that the exchange means flows in series.
  • the heat exchange means is connected to a heat transfer tube in which the liquid-phase refrigerant flows, and an outer periphery of the heat transfer tube, and is in contact with the gas-phase refrigerant. , And a heat exchange device.
  • the heat exchange means includes a gas phase refrigerant inflow portion into which the gas phase refrigerant flows in, a gas phase refrigerant outflow portion from which the gas phase refrigerant flows out, A liquid-phase refrigerant inflow section through which the liquid-phase refrigerant flows in, and a liquid-phase refrigerant outflow section through which the liquid-phase refrigerant flows out, and the refrigerant circulation means includes a plurality of the gas exchange units respectively included in the plurality of heat exchange means.
  • a first gas phase pipe connecting the phase refrigerant inflow portion and the refrigerant supply means, and a plurality of gas phase refrigerant outflow portions and a second gas phase connecting the refrigerant supply means respectively provided in the plurality of heat exchange means A liquid phase refrigerant inflow portion provided in one heat exchange means of the pipe, the heat exchange means, and the liquid phase refrigerant outflow portion provided in another heat exchange means adjacent to the one heat exchange means.
  • a heat exchange apparatus comprising: a liquid phase connection pipe.
  • the plurality of heat exchange means, the first gas phase pipe, and the second gas phase pipe are the plurality of heat exchange means,
  • the order in which the plurality of heat exchange means are connected to the second gas phase pipe and the order in which the plurality of heat exchanging means are connected to the second gas phase pipe are in the same order as viewed from the side connected to the refrigerant supply means. Connected heat exchange device.
  • the plurality of heat exchange means, the first gas phase pipe, and the second gas phase pipe are the plurality of heat exchange means, The order in which the plurality of heat exchanging means are connected to the second gas phase pipe and the order in which the plurality of heat exchanging means are connected to the second gas phase pipe are reversed from the side connected to the refrigerant supply means. Connected heat exchange device.
  • the heat exchange means includes a gas phase refrigerant passage surface through which the gas phase refrigerant passes, a liquid phase refrigerant inflow portion into which the liquid phase refrigerant flows in, A liquid-phase refrigerant outflow portion through which the liquid-phase refrigerant flows out, wherein the refrigerant circulation means includes the plurality of heat exchange means, and the gas-phase tubes in which the gas-phase refrigerant flows and the plurality of heat exchanges A plurality of partition plates located on the gas-phase refrigerant inflow side of each of the gas-phase refrigerant passage surfaces provided in the means, and the liquid-phase refrigerant inflow provided in one heat exchange means among the plurality of heat exchange means A liquid-phase pipe connecting the liquid-phase refrigerant outflow part provided in another heat exchange means adjacent to the first heat exchange means, and the heat exchange means at one end of the plurality of heat exchange means A liquid phase refrigerant inflow section and
  • an angle formed by a normal line of the gas-phase refrigerant passage surface and a flow direction of the gas-phase refrigerant in the gas-phase pipe is greater than 90 degrees and less than 180 degrees
  • the angle formed by the normal line of the gas-phase refrigerant passage surface and the normal line of the partition plate is a substantially right angle.
  • the heat exchange apparatus as described in any one of additional remark 1 to 10, the heat receiving means which vaporizes a refrigerant
  • the liquid refrigerant at the first temperature and the gas-phase refrigerant at the second temperature are supplied in one circulation system, the gas-phase refrigerant is circulated in parallel, and the liquid-phase refrigerant is connected in series.
  • a heat exchange method in which heat exchange is performed between the gas-phase refrigerant and the liquid-phase refrigerant that are circulated and arranged in parallel.
  • Heat exchange device 110 100, 200, 201, 300, 301, 302, 1100 Heat exchange device 110, 210, 310 Refrigerant supply part 120, 220, 320 Heat exchanger 121 Tube 122 Fin 130 Refrigerant circulation part 221 Gas phase refrigerant inflow part 222 Gas phase refrigerant Outflow portion 223, 322 Liquid phase refrigerant inflow portion 224, 323 Liquid phase refrigerant outflow portion 231 First gas phase tube 232 Second gas phase tube 241, 341 Liquid phase tube 242, 342 Liquid phase connection tube 321 Gas phase refrigerant passage Surface 330 Gas-phase pipe 350 Partition plate 1000 Refrigeration system 1200 Heat receiving part 1300 Compressor 1400 Heat radiation part 1500 Expansion valve

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  • 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)

Abstract

La présente invention concerne, étant donné que l'amélioration de l'échange de chaleur entre un fluide frigorigène en phase gazeuse et un fluide frigorigène en phase liquide dans un système de réfrigération pourrait résulter à la place en une réduction de l'efficacité du système de réfrigération dans son ensemble, un dispositif d'échange de chaleur (201) comprenant : un moyen d'alimentation en fluide frigorigène (210) pour alimenter un fluide frigorigène en phase liquide à première température (R11) et un fluide frigorigène en phase gazeuse à seconde température (R12) dans un système de circulation ; une pluralité de moyens d'échange de chaleur (220A, 220B) qui sont chacun conçus de manière à réaliser un échange de chaleur entre le fluide frigorigène en phase liquide (R11) et le fluide frigorigène en phase gazeuse (R12) ; et un moyen de circulation de fluide frigorigène (231, 232, 242) pour faire circuler le fluide frigorigène en phase gazeuse (R12) de manière à ce que le fluide frigorigène en phase gazeuse (R12) s'écoule en parallèle dans la pluralité de moyens d'échange de chaleur et pour faire circuler le fluide frigorigène en phase liquide (R11) de manière à ce que le fluide frigorigène en phase liquide (R11) s'écoule en série dans la pluralité de moyens d'échange de chaleur.
PCT/JP2017/011771 2016-03-31 2017-03-23 Dispositif d'échange de chaleur, système de réfrigération et procédé d'échange de chaleur WO2017170139A1 (fr)

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JP2018509186A JP6888616B2 (ja) 2016-03-31 2017-03-23 熱交換装置、冷凍システム及び熱交換方法
US16/089,994 US20190145667A1 (en) 2016-03-31 2017-03-23 Heat exchange device, refrigeration system, and heat exchange method

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JP2016-070218 2016-03-31

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EP2174810A2 (fr) * 2008-10-07 2010-04-14 Scania CV AB (publ) Système et dispositif comprenant un condenseur-évaporateur
JP2011133188A (ja) * 2009-12-25 2011-07-07 Nikkei Nekko Kk 内部熱交換器
US20130055753A1 (en) * 2011-09-07 2013-03-07 Beomchan Kim Air conditioner
JP2013164246A (ja) * 2012-02-13 2013-08-22 Mitsubishi Electric Corp 熱交換器及び冷凍空調装置

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JP2003314927A (ja) * 2002-04-18 2003-11-06 Matsushita Electric Ind Co Ltd 熱交換器およびその熱交換器を用いた冷凍サイクル装置
KR101259625B1 (ko) * 2010-11-16 2013-04-29 엘지전자 주식회사 공기조화기
EP2489774B1 (fr) * 2011-02-18 2015-06-17 Electrolux Home Products Corporation N.V. Sèche-linge à pompe à chaleur
WO2013160929A1 (fr) * 2012-04-23 2013-10-31 三菱電機株式会社 Système à cycle frigorifique
CN105371267B (zh) * 2015-12-16 2018-07-03 广州粤能电力科技开发有限公司 加热锅炉一、二次风的二次再热汽轮机回热能量利用系统

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KR20070097609A (ko) * 2006-03-28 2007-10-05 한라공조주식회사 이산화탄소용 내부열교환기
EP2174810A2 (fr) * 2008-10-07 2010-04-14 Scania CV AB (publ) Système et dispositif comprenant un condenseur-évaporateur
JP2011133188A (ja) * 2009-12-25 2011-07-07 Nikkei Nekko Kk 内部熱交換器
US20130055753A1 (en) * 2011-09-07 2013-03-07 Beomchan Kim Air conditioner
JP2013164246A (ja) * 2012-02-13 2013-08-22 Mitsubishi Electric Corp 熱交換器及び冷凍空調装置

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