WO2012161447A2 - Système de pompe à chaleur - Google Patents

Système de pompe à chaleur Download PDF

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Publication number
WO2012161447A2
WO2012161447A2 PCT/KR2012/003750 KR2012003750W WO2012161447A2 WO 2012161447 A2 WO2012161447 A2 WO 2012161447A2 KR 2012003750 W KR2012003750 W KR 2012003750W WO 2012161447 A2 WO2012161447 A2 WO 2012161447A2
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WIPO (PCT)
Prior art keywords
heat
heat exchanger
conduit
medium
storage medium
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Ceased
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PCT/KR2012/003750
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English (en)
Korean (ko)
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WO2012161447A3 (fr
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진주환
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Publication of WO2012161447A2 publication Critical patent/WO2012161447A2/fr
Publication of WO2012161447A3 publication Critical patent/WO2012161447A3/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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0095—Devices for preventing damage by freezing
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
    • F25B2313/0211—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit the auxiliary heat exchanger being only used during defrosting
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • F25B2313/0254—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in series arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve

Definitions

  • the present invention relates to a heat pump system, and more particularly, to a defrosting and cooling structure of an outdoor heat exchanger of an air heat source heat pump system.
  • the heat pump operates the steam compression refrigeration cycle in the opposite direction to the cooling (freezing) operation, i.e., the indoor heat exchanger acts as the condenser, the outdoor heat exchanger as the evaporator during the heating operation, and the outdoor heat exchanger during the cooling operation.
  • the refrigerant is evaporated or condensed in the outdoor heat exchanger.
  • the air heat source heat pump is installed to expose the outdoor heat exchanger to the outside air to evaporate or condense the refrigerant by the outside air, especially when the outside air temperature falls below the dew point temperature during the heating operation. Condensation of the refrigerant liquid in the outdoor heat exchanger, which acts as a condenser when the frost condenses, may cause the evaporation of the refrigerant vapor to evaporate or become impossible.
  • the poor coefficient of performance is deteriorating, and the above-mentioned problem has been solved, which is one of the key topics in the development of heat pump technology.
  • the refrigeration cycle is converted into a reverse cycle, that is, the outdoor heat exchanger acting as an evaporator is acted as a condenser, or an electrothermal heater is installed in the outdoor heat exchanger. It is well known to deteriorate the coefficient of frost by defrosting the frost attached to the surface, but the former causes the heating operation to be stopped, and the latter is not only to improve the coefficient of coefficient but also requires extra energy.
  • the invention relates to the defrosting and cooling promotion structure of the outdoor heat exchanger of the air heat source heat pump system, which corrects the problems of the known defrosting technology, namely reverse cycle operation and heat heater installation, and improves the coefficient of performance by the non-heating heat source. It is disclosed by patent document 1.
  • the defrosting and cooling promotion structure of the outdoor heat exchanger of the air heat source heat pump system of Patent Document 1 includes a compressor, a four-way valve, an indoor heat exchanger, a cooling expansion valve, a heating expansion valve, an outdoor heat exchanger, and the four-way.
  • a basic refrigeration circuit connecting the valves in order to the refrigerant conduit and connecting the four-way valve and the compressor to the refrigerant suction conduit;
  • a heat storage tank in which both ends of the bypass refrigerant conduit are connected between both expansion valves of the refrigerant conduit to install a heat exchanger for the bypass refrigerant conduit, and surround the heating heat exchanger, and inject a heat medium therein;
  • An auxiliary heat exchanger installed in the outdoor heat exchanger by connecting a heat medium supply pipe having a heat medium circulation pump to the heat storage tank and a heat medium return pipe;
  • a heat exchanger is installed in the heat medium supply pipe and the heat medium return pipe, and a heat medium supply pipe and a heat medium return pipe are installed in the heat medium supply pipe and the heat medium return pipe, and an outdoor heat exchanger defrosting and cooling means is provided around the heat exchanger.
  • the defrosting and cooling promoting structure of the outdoor heat exchanger of the air heat source heat pump system is heat-exchanged by heat-exchanging the heat source for circulating heat exchanger and the heat medium circulating the heat exchanger, which is supplied to the heat source storage tank for heating, and then heats or cooled the heat medium.
  • the auxiliary heat exchanger is circulated to defrost the outdoor heat exchanger during the heating operation, and the cooling coefficient is maintained to be satisfactorily maintained by supercooling the refrigerant liquid condensed in the indoor or outdoor heat exchanger.
  • the heating medium When the heating medium is heated by the non-heating heat source as described above, if no heating source is generated or small, the heating medium heated by the condensation heat when the refrigerant liquid passing through the heating heat exchanger installed in the heat storage tank is recondensed.
  • the coefficient of performance can be maintained satisfactorily during the heating operation, and the heat storage tank bypasses the heating heat exchanger by the detection signal of the temperature sensor when the refrigerant liquid discharged from the indoor or outdoor heat exchanger is above a certain temperature. By lowering, the evaporation of the refrigerant vapor in the indoor or outdoor heat exchanger is improved.
  • the defrosting and cooling promotion structure of the outdoor heat exchanger of the air heat source heat pump system is based on the heating medium supply pipe and the heating medium return pipe of the auxiliary heat exchanger when the auxiliary heat exchanger and the outdoor heat exchanger defrosting and cooling means are combined.
  • a brine (heat medium) supply pipe and a brine (heat medium) return pipe of the cooling means, and a circulation pump and a solenoid valve are installed in the heat medium supply pipe and the brine (heat medium) supply pipe, respectively, so that the structure is complicated, and the flow path friction is large. The heat cycle is not desired.
  • a forced convection type outdoor heat exchanger installed with a fan must be used to use the heat source (latent heat) contained in the air well when evaporating or condensing the refrigerant liquid or refrigerant vapor circulating in the outdoor heat exchanger.
  • the frost attached to the outdoor heat exchanger by driving the fan while circulating the heat medium (Brine) of a certain temperature (about 20 ° C) heat exchanged in a heat-free heat source tank to an auxiliary heat exchanger installed in a forced convection outdoor heat exchanger as shown in FIG.
  • the present invention corrects the above problems, simplifies the structure of the heat storage tank, the defrosting and the cooling means, facilitates the circulation of the heat medium, and the utilization efficiency of the heat source for the non-heat source when circulating the heat medium heat-exchanged with the heat source for the outdoor heat exchanger. It is an object of the present invention to provide an air heat source heat pump system capable of increasing the efficiency and improving the coefficient of performance.
  • the present invention is connected to the compressor, 4-way valve, indoor heat exchanger, cooling expansion valve, heating expansion valve, outdoor heat exchanger and the 4-way valve in order to the refrigerant conduit,
  • a basic refrigeration cycle connecting the way valve and the compressor to the refrigerant suction conduit;
  • a refrigerant bypass conduit is connected between a cooling expansion valve and a heating expansion valve of the refrigerant conduit to form a condenser in the refrigerant bypass conduit, and the condenser is surrounded by a heat storage tank in which a heat storage medium is injected.
  • a defrosting means having an auxiliary heat exchanger connected to the heat storage tank and the auxiliary heat exchanger so that a heat storage medium circulation circuit is formed by a heat storage medium supply pipe having a heat storage medium circulation pump and a heat storage medium return pipe;
  • a heat exchanger is formed in the heat medium conduit by connecting both ends of the heat medium conduit behind the heat storage medium circulation pump of the heat storage medium supply pipe, and a heat source storage tank for the heat exchanger is formed in the heat exchange medium, and the heat storage medium closed circulation circuit formed in the defrosting means.
  • a defrosting and cooling means combined with the to form a heat medium circulation circuit, and circulating a heat medium to the auxiliary heat exchanger; And a performance improving means installed between the heat exchanger outlet side of the heat medium conduit and the outdoor heat exchanger and the 4-way valve of the refrigerant conduit.
  • the present invention circulates the heat storage medium heated by the condensation heat of the refrigerant liquid in the heat storage tank in the heat storage tank to the auxiliary heat exchanger installed in the outdoor heat exchanger to prevent frost from the outdoor heat exchanger or to defrost the frost attached thereto.
  • the heat medium for circulating the heat source and the heat exchanger is heat-exchanged in the non-heat heat storage tank for heating or cooling, and the heated or cooled heat medium is circulated to the auxiliary heat exchanger to perform the above defrost or the like.
  • the refrigerant vapor of the high temperature and high pressure compressed by the compressor is first condensed in the endothermic and heat radiating heat exchanger of the performance improving means before condensing in the outdoor heat exchanger and then recondensed in the outdoor heat exchanger. Because of the good condensation, this also contributes to the improvement of the coefficient of performance, which can improve the performance.
  • the present invention is simplified by combining the heat storage medium circulation circuit and the heat medium circulation circuit in a simple structure to reduce the cost and easy construction, and in particular, the outdoor heat exchange without circulating obstacles due to the low flow resistance during the heat storage medium and heat medium circulation Defrosting and cooling of group can be performed favorably.
  • FIG. 1 is a block diagram of an embodiment of the present invention.
  • FIG. 1 is a block diagram of an embodiment of the present invention
  • 10 is a basic refrigeration cycle
  • the basic refrigeration cycle 10 is a compressor 11, a four-way valve 12, an indoor heat exchanger 13
  • the cooling expansion valve 14, the heating expansion valve 15, the outdoor heat exchanger 16, and the four-way valve 12 are sequentially connected to the refrigerant conduit 17, and the four-way valve 12 is connected.
  • the compressor 11 connected to the refrigerant suction conduit 18, the basic refrigeration cycle 10 is based on the air heat source type.
  • the defrosting means 20 is a defrosting means, and the defrosting means 20 connects the refrigerant bypass conduit 21a at a predetermined interval between the condensation expansion valve 14 and the heating expansion valve 15 of the refrigerant conduit 17.
  • a condenser 21b in the refrigerant bypass conduit 21a surround the condenser 21b with a heat storage tank 22 into which a heat storage medium is injected, and assist between the heat transfer tubes of the outdoor heat exchanger 16.
  • the heat exchanger tube of the heat exchanger 23 is installed, the auxiliary heat exchanger 23 is integrally formed on the side of the outdoor heat exchanger 16 by integrally fining, or is separately formed on the side of the outdoor heat exchanger 16.
  • a heat storage medium closed circulation circuit is formed.
  • a three-way valve 37 is installed at the inlet side connection portion of the refrigerant conduit 17 and the refrigerant bypass conduit 21a so that the refrigerant liquid flows into the refrigerant conduit 17 normally.
  • the 3-way valve ( 37) is switched to the refrigerant bypass conduit 21a side to condense the refrigerant liquid above the set temperature in the condenser 21b to prevent the specific volume of the refrigerant liquid supplied to the outdoor heat exchanger 16 from decreasing, thereby reducing the coefficient of performance.
  • the heat storage medium is heated and stored in the heat storage tank 22 by the heat of condensation of the condenser 21b, and used for defrosting the outdoor heat exchanger 16 during the heating operation.
  • the defrosting and cooling means 30 is a defrosting and cooling means, the defrosting and cooling means 30 is connected to the rear of the heat storage medium circulation pump 25 of the heat storage medium supply pipe 24a at both ends of the heat medium conduit 33 at regular intervals.
  • a heat exchanger 31 is formed in the heat medium conduit 33, and a heat source storage tank 32 is formed in the heat exchanger 31, and the heat storage medium closed circulation circuit of the defrosting means 20, that is, an auxiliary heat exchanger. (23), the heat storage medium return pipe 24b, the heat storage tank 22, the heat storage medium circulation pump 25 and the heat storage medium supply pipe 24a to form a heat medium closed circulation circuit, the heat exchanger (31), etc.
  • a material having a low freezing temperature such as ethylene glycol
  • a three-way valve 36 is provided at the inlet connection portion of the heat medium conduit 33 of the heat storage medium supply pipe 24a, and is installed in the temperature sensor 35a installed in the heat storage tank 22 and the heat source storage tank 32 for no operation.
  • the three-way valve 36 is switched to open toward the higher detection value of one temperature sensor 35b, that is, when the temperature of the heat storage medium heated in the heat storage tank 22 during heating operation is high, the heat storage medium is transferred to the auxiliary heat exchanger 23.
  • the outdoor heat exchanger 16 is circulated to defrost the heat exchanger 31 and the temperature of the heat medium to be heat-exchanged with the heat-free source is high, the heat medium is circulated to the auxiliary heat exchanger 23 to circulate the heat exchanger 31. It is to perform defrost.
  • the heat medium that is exchanged with the non-heat heat source and cooled while circulating the heat exchanger 31 is circulated through the auxiliary heat exchanger 23 to cool the outdoor heat exchanger 16.
  • the heat source supplied to the unheated heat source storage tank 32 is to prevent environmental destruction by using renewable energy such as river water, sea water, ground water collected, solar heat collecting device (air or hot water), rainwater, waste water, etc.
  • renewable energy such as river water, sea water, ground water collected, solar heat collecting device (air or hot water), rainwater, waste water, etc.
  • the performance improving means 40 is a performance improving means, wherein the performance improving means 40 is formed between the outlet of the heat exchanger 31 of the heat medium conduit 33 and the outdoor heat exchanger 16 and the 4-way valve 12 of the refrigerant conduit 17.
  • the wet saturated steam sucked into the compressor 11 is heated by the heat retained by the heat medium, and during the cooling operation, the high-temperature / high pressure refrigerant vapor compressed by the compressor 11 is subjected to the outdoor heat exchanger 16.
  • the performance improving means 40 is provided with a heat dissipation heat exchanger 41 at the outlet side of the heat exchanger 31 of the heat medium conduit 33, and a 4-way with the outdoor heat exchanger 16 of the refrigerant conduit 17.
  • An endothermic and heat radiating heat exchanger (42) is provided between the valves (12) to maintain a heat exchange relationship with the heat radiating heat exchanger (41).
  • the 3-way valve 39 is provided at the inlet side connection of the heat medium, so that the heat medium is supplied to the heat radiating heat exchanger 41 during the heating operation, and the heat medium flows into the bypass conduit 38 during the cooling operation.
  • condensation of the refrigerant vapor in the endothermic and heat dissipating heat exchanger 42 is improved.
  • Reference numerals 51, 52, 53, 54 are check valves.
  • the outdoor heat exchanger 16 is provided with a suction type or a pressurized fan (not shown) to improve the evaporation of the refrigerant liquid and the condensation of the refrigerant vapor, which is well known in an air heat source heat pump.
  • the indoor heat exchanger 13 operates by heating the 4-way valve 12 so that the refrigerant flows in the solid line of the arrow in FIG. It functions as a condenser at the time of operation and an evaporator at the time of cooling operation, and performs a heating function and a cooling function is the same as the conventional thing.
  • the temperature sensor If the detected value of (26) is below a predetermined temperature, the three-way valve 37 is switched to the normal position and the refrigerant bypass conduit 21a is closed.
  • the heat storage medium heated by the heat of condensation of the refrigerant liquid as described above is stored in the heat storage tank 22, and when the outside air temperature is lower than the set temperature (eg, 10 ° C.) or lower than the dew point temperature during the heating operation, the outdoor heat exchanger 16 ) Is used for defrost.
  • the set temperature e.g. 10 ° C.
  • the outdoor heat exchanger 16 Is used for defrost.
  • the heat storage medium stored in the heat storage tank 22 and the non-heat heat source supplied to the non-thermal heat source storage tank 32 is selectively circulated to the auxiliary heat exchanger 23 installed in the outdoor heat exchanger 16 to heat the heat pipes and fins of the outdoor heat exchanger 16 so that frost is attached. To prevent or defrost the frost attached.
  • the method of selectively circulating the heat storage medium and the heat medium in the auxiliary heat exchanger 23 installed in the outdoor heat exchanger 16 may be installed in the temperature sensor 35a installed in the heat storage tank 22 and the heat source storage tank 32 for free use.
  • the 3-way valve 36 is switched to open so that the heat storage medium or heat medium having the higher detection value is circulated to the auxiliary heat exchanger 23 by the detection value of the temperature sensor 35b, that is, the temperature of the heat storage medium is
  • the heat storage medium stored in the heat storage tank 22 is circulated through the auxiliary heat exchanger 23 installed in the outdoor heat exchanger 16 by the heat storage medium circulation pump 25 via the heat storage medium supply pipe 24a.
  • a heat storage medium closed circulation circuit is returned to the heat storage tank 22 via the heat storage heat medium return tube 24b, and a heat source storage tank for a non- Stored in 32)
  • the heat source for heat transfer from the heat-free heat source and the heat-free heat exchanger 31 and the heat source for the non-heat source storage tank 32 is transferred to the outdoor heat exchanger (16).
  • auxiliary heat exchanger 23 Installed auxiliary heat exchanger 23, heat storage medium return pipe 24b, heat storage tank 22, heat storage medium supply pipe 24a, heat storage medium circulation pump 25, 3-way valve 36 and heat medium conduit 33 and heat exchange
  • the defrosting and the like of the auxiliary heat exchanger 23 are carried out in the same manner as the heat storage medium while forming the heat medium circulation circuit formed by the gas 31.
  • the function of the heat storage tank 22 is stopped while the heat medium waste circulation circuit performs the function, and during the cold operation, the heat medium waste circulation circuit is operated in the same manner as in the heating operation, in the case of the hot air having a high outside temperature.
  • the heat medium cooled by heat exchange with the heat source is circulated through the auxiliary heat exchanger 23 as in the heating operation, heat transfer is performed on the heat transfer tube and fin of the outdoor heat exchanger 16 to promote the condensation of the refrigerant vapor, thereby improving the coefficient of performance. will be.
  • the temperature of the non-heat source for heat is better in cold weather during the heating operation, and not more than 25 ° C in the cooling operation.
  • the 3-way valve 39 is operated so that the heat medium flows toward the heat-dissipating heat exchanger 41 during the heating operation.
  • the heat medium passing through (41) is evaporated its retaining heat in the outdoor heat exchanger (16) and then heat exchanged with the wetted refrigerant vapor which is sucked into the compressor (11) via the endothermic and heat radiating heat exchanger (42).
  • the heat dissipation in the auxiliary heat exchanger 23 installed in the outdoor heat exchanger 16 reduces the loss of heat of the heat medium into the atmosphere even when the fan is driven, thereby improving the coefficient of performance.
  • the high-temperature / high-pressure refrigerant vapor compressed by the compressor 11 is transferred to the outdoor heat exchanger 16. Since the condensation of the refrigerant vapor is good since the first condensation is carried out through the endothermic and heat dissipating heat exchanger 42 before being condensed and then recondensed in the outdoor heat exchanger 16, this is also an improvement factor of the coefficient of performance.
  • the three-way valve 39 is operated so that the heat medium flows toward the bypass conduit 38 to prevent the heat medium from being heated by the heat of release of the endothermic and heat dissipating heat exchanger 42. Only the following heat medium is circulated to improve the condensation of the refrigerant vapor.
  • the heat storage medium circulation pump 25 is installed only in the heat storage medium supply pipe 24a, and both ends of the heat medium conduit 33 are connected to the heat storage medium supply pipe 24a, thereby providing the heat medium conduit 33 and the heat exchanger.
  • the heat storage medium circulation circuit of the 31 and the defrosting means 20, that is, the auxiliary heat exchanger 23, the heat storage medium return pipe 24b, the heat storage tank 22, the heat storage medium circulation pump 25, and the heat storage medium supply pipe 24a By combining to form a heat medium circulation circuit, the structure is simplified to reduce the cost, it is possible to perform a good defrost and cooling operation of the outdoor heat exchanger without a circulation obstacle of the heat medium.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

La présente invention concerne un système de pompe à chaleur et plus spécifiquement une structure de dégivrage et refroidissement d'un échangeur thermique extérieur d'un système de pompe à chaleur de type air-air, permettant de simplifier la structure d'un réservoir de stockage de la chaleur, et un moyen de dégivrage et refroidissement améliorant la circulation d'un milieu chauffant, améliorant l'efficacité d'utilisation d'une source de chaleur gratuite lors de la circulation du milieu chauffant à une température fixe chauffée par la source de chaleur gratuite vers l'échangeur thermique extérieur, et augmentant le coefficient de performance de celui-ci à un niveau satisfaisant. Le système selon la présente invention comprend: un cycle de congélation de base ayant un compresseur (11), un robinet à quatre voies (12), un échangeur thermique intérieur (13), un détendeur (14) assurant le refroidissement, un détendeur (15) assurant le chauffage, un échangeur thermique extérieur (16), le robinet à quatre voies (12), reliés à une conduite (17) pour fluide frigorigène, dans l'ordre respectif; le robinet à quatre voies (12) et le compresseur étant reliés par un tuyau d'aspiration de gel (18); un moyen de dégivrage ayant un condenseur (21b) formé sur un tuyau de dérivation (21a) du fluide frigorigène par raccordement de ce dernier entre le détendeur (14) assurant le refroidissement et le détendeur (15) assurant le chauffage de la conduite (17) pour fluide frigorigène, entourant le condenseur (21b) avec un réservoir de stockage thermique (22) à l'intérieur duquel est injecté un milieu de stockage thermique; un échangeur thermique auxiliaire (23) est monté sur l'échangeur thermique extérieur (16) de sorte que le réservoir de stockage thermique (22) et l'échangeur de chaleur auxiliaire (23) sont reliés à un tuyau d'alimentation en milieu de stockage thermique (24a) sur lequel tuyau est montée une pompe de circulation (25) du milieu de stockage thermique, et un tuyau de retour de milieu de stockage thermique, afin de former un circuit de circulation fermé pour moyen de stockage thermique; un moyen de dégivrage et de refroidissement (30) présentant un échangeur thermique (31) formé sur une canalisation (33) pour milieu chauffant par raccordement des deux extrémités de la canalisation (33) à l'arrière de la pompe de circulation (25) du tuyau d'alimentation (24a), et présentant un réservoir de stockage (32) de source de chaleur gratuite formé sur l'échangeur thermique (31) et couplant ce dernier au circuit de circulation fermé pour milieu de stockage thermique formé sur le moyen de dégivrage (20) afin de former un circuit de circulation fermé pour milieu chauffant, afin de faire circuler le milieu chauffant dans l'échangeur thermique auxiliaire (23); et un moyen (40) permettant d'améliorer les performances monté sur le côté sortie de l'échangeur thermique (31) à absorption de chaleur de la canalisation (33) pour milieu chauffant et entre l'échangeur thermique extérieur (16) et le robinet à quatre voies (12) de la conduite pour fluide frigorigène (17).
PCT/KR2012/003750 2011-05-23 2012-05-14 Système de pompe à chaleur Ceased WO2012161447A2 (fr)

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WO2012161447A3 (fr) 2013-03-21

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