WO1999015841A1 - Conditionneur d'air, conduite d'echange de chaleur pour ledit conditionneur d'air, et unite exterieure - Google Patents

Conditionneur d'air, conduite d'echange de chaleur pour ledit conditionneur d'air, et unite exterieure Download PDF

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Publication number
WO1999015841A1
WO1999015841A1 PCT/JP1997/003333 JP9703333W WO9915841A1 WO 1999015841 A1 WO1999015841 A1 WO 1999015841A1 JP 9703333 W JP9703333 W JP 9703333W WO 9915841 A1 WO9915841 A1 WO 9915841A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
outdoor unit
air conditioner
liquid
gas
Prior art date
Application number
PCT/JP1997/003333
Other languages
English (en)
Japanese (ja)
Inventor
Nobuhiro Sano
Kenichi Nakamura
Hiroshi Takenaka
Kazuhiro Tsuchihashi
Yoshinori Iwashina
Shinichirou Yamada
Susumu Nakayama
Original Assignee
Hitachi, Ltd.
Hitachi Shimizu Engineering Co., Ltd.
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 Hitachi, Ltd., Hitachi Shimizu Engineering Co., Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1997/003333 priority Critical patent/WO1999015841A1/fr
Priority to JP51878799A priority patent/JP3736809B2/ja
Publication of WO1999015841A1 publication Critical patent/WO1999015841A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • Air conditioner heat exchange pipe used for the same, and outdoor unit
  • the present invention relates to an air conditioner having a refrigeration cycle, and is particularly suitable for protection of the global environment and recyclability, miniaturization, price reduction, and performance improvement.
  • HFC-based refrigerant for example, R407C
  • R407C chlorofluorocarbon-based refrigerant
  • the air conditioner be small with respect to the cooling and heating capacity in order to improve the recyclability.
  • connection piping length between the outdoor unit and the indoor unit increases.
  • leveling the capacity difference between indoor units There is no mention of leveling the capacity difference between indoor units.
  • Another object of the present invention is to provide an air conditioner in a multi-type air conditioner, which can equalize the difference in performance between indoor units without increasing the refrigerant piping system.
  • the present invention is to solve at least one of the above problems. Disclosure of the invention
  • the present invention relates to an air conditioner in which an outdoor unit having a compressor and an outdoor heat exchanger, and a plurality of indoor units having an indoor heat exchanger and an expansion valve are connected by a gas pipe and a liquid pipe.
  • the gas pipe and the liquid pipe are integrated and provided with means for exchanging heat with a part of the integrated gas pipe and the liquid pipe.
  • the refrigerant circulating in the refrigeration cycle has a temperature gradient at the inlet and outlet of the refrigerant during condensation, resulting in supercooling. It is difficult to take enough. However, since part of the gas and liquid pipes is heat-exchanged, even HFC-based refrigerants can take a large amount of supercooling and improve the efficiency of the refrigeration cycle. Then, since the gas pipe and the liquid pipe integrated between the outdoor unit and the indoor unit are heat-exchanged in a part thereof, the refrigerant is exchanged between the outdoor unit and the indoor unit.
  • R407C non-chlorine-based HFC-based refrigerant
  • the length of the connecting pipe (refrigerant pipe) for transportation is different, the length of the part to be heat-exchanged may be determined accordingly. Therefore, versatility is improved compared to the one that exchanges heat in the outdoor unit, and the system can be deployed in detail according to the cooling and heating capacity.
  • the use of HFC-based refrigerants helps to protect the environment, improves the efficiency of refrigeration cycles, and allows outdoor units to have a simple structure that is no different from conventional ones. Can also be advantageous.
  • the present invention relates to an air conditioner provided with a refrigeration cycle in which an outdoor unit having a compressor, a four-way valve, a gas-liquid separator and an outdoor heat exchanger and a plurality of indoor units are connected by piping, Of the HFC-based refrigerant flowing in the outdoor unit and the piping on the suction side of the compressor, the piping on the outdoor unit in which the condensed HFC-based refrigerant flows, and the piping on the suction side of the compressor It has a straight pipe portion arranged to exchange heat with a part of the pipe through which the condensed HFC-based refrigerant flows.
  • the outdoor unit Since the heat is exchanged in a part of the pipe on the suction side of the compressor and in a part of the pipe in which the condensed HFC-based refrigerant flows, the outdoor unit is downsized.
  • the refrigerant can be supercooled by the outdoor unit, so the efficiency of the connection pipe from the outdoor unit to the indoor unit is increased by increasing the length of the connection pipe. It is possible to prevent the decrease and to equalize the difference in capacity due to the difference in the connection pipe length between the indoor unit located closer to the outdoor unit and the indoor unit located farther from the outdoor unit.
  • the present invention provides an air conditioner having a plurality of indoor units, a plurality of outdoor units, and a liquid pipe and a gas pipe provided in each of the indoor units and the outdoor unit, A common gas pipe connected to one end side of the gas pipes of the unit and connected to one end thereof, and a liquid pipe of each of the plurality of outdoor units to the one end side. Connected other end The side is provided with a common liquid pipe connected to each indoor unit, and means for exchanging heat between a part of the common gas pipe and a part of the common liquid pipe. Having a common gas pipe and a common liquid pipe makes it easy to add indoor units and outdoor units, and furthermore, heat exchange is performed between a part of the common gas pipe and a part of the common liquid pipe. Pressure loss due to piping that is long and difficult to construct can be reduced, and as a result, the capacity difference between indoor units and between additional indoor units can be equalized.
  • the present invention relates to a heat exchange pipe formed by combining a plurality of refrigerant pipes used in an air conditioner, wherein a gas pipe having a pipe connection member at each of both ends, and a pipe pipe is connected to each of the both ends. And a liquid pipe with a part bent and a straight pipe brazed to a gas pipe.
  • the gas pipe and the liquid pipe are connected to each other to ensure heat exchange, and the length of the straight pipe can be easily changed. If this length is determined according to the length of the air conditioner, the system can be easily deployed, and the air conditioning load in the future can be increased.
  • the present invention relates to an air conditioner provided with a refrigeration cycle in which an outdoor unit having a compressor and an outdoor heat exchanger and an indoor unit having an indoor heat exchanger and an expansion valve are connected by gas piping and liquid piping.
  • a heat exchange pipe for exchanging heat between a part of the gas pipe and a part of the liquid pipe in a straight pipe part thereof is provided, and the outdoor unit and the indoor unit are connected via the heat exchange pipe.
  • the present invention provides an outdoor unit having a compressor and an outdoor heat exchanger, In an air conditioner equipped with a refrigeration cycle in which a heat exchanger and an indoor unit having an expansion valve are connected by a gas pipe and a liquid pipe, a part of the gas pipe and a liquid pipe are connected between the outdoor unit and the indoor unit.
  • the brazing part is brazed with a part of the straight pipe part.When the length of the connection pipe between the outdoor unit and the indoor unit is 60 to 100 m, the length of the brazing part is 100. 0 to 500 mm.
  • the present invention relates to an outdoor unit having a compressor, a four-way valve, a gas-liquid separator, and an outdoor heat exchanger, which is connected to the indoor unit by piping and forms a refrigeration cycle in which HFC-based refrigerant circulates. It has a straight pipe portion that is arranged so that the pipe on the suction side and a part of the pipe through which the condensed HFC-based refrigerant flows exchange heat with each other. .
  • connection piping length is long as in a multi-type air conditioner or when there is a problem in the capacity difference between the indoor units, it can be preferable.
  • the liquid pipe be provided with a dryer for removing moisture in the refrigerant.
  • a plurality of heat exchange pipes to which a straight pipe portion of a gas pipe and a liquid pipe having a pipe connection member at both ends is brazed are connected in series.
  • the present invention relates to the above-mentioned, It is desirable to prepare heat exchange pipes with different lengths in advance, and connect the outdoor unit and the indoor unit via a combined heat exchange pipe.
  • FIG. 1 is a block diagram showing a refrigeration cycle according to an embodiment
  • FIG. 2 is a front view schematically showing a heat exchange pipe according to the embodiment
  • FIG. 3 is a diagram showing a state between an indoor unit and an outdoor unit.
  • Graph showing the relationship between the required length of the heat exchange pipe of the heat exchange pipe (the length of the brazing part) and the required length of the connection pipe at the site
  • Fig. 4 shows the connection by combining the heat exchange pipes in Fig. 2.
  • Fig. 5 is a rough diagram showing the relationship between the length of connecting pipes and the required number of heat exchange pipes.
  • Fig. 6 is another embodiment in which functional parts are combined.
  • 7 is a block diagram showing a refrigeration cycle of a multi-type air conditioner according to another embodiment
  • FIG. 8 is a construction view of an outdoor unit and an indoor unit.
  • the block diagram shown in FIG. FIG. 10 is a block diagram showing a refrigeration cycle of a multi-type air conditioner
  • FIG. 10 is a block diagram showing a refrigeration cycle of a multi-type air conditioner according to another embodiment
  • FIG. 10 is a block diagram showing a refrigeration cycle of a multi-type air conditioner according to another embodiment
  • FIG. 10 is a front view showing details of a heat exchange part between a gas pipe and a liquid pipe of the multi-type air conditioner according to the embodiment of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • a compressor 1 is a compressor
  • 2 is an outdoor heat exchanger
  • 5 is a gas-liquid separator
  • 7 is a blower fan for an outdoor unit, which constitutes an outdoor unit.
  • the indoor unit 25 is provided with an expansion valve 3, an indoor heat exchanger 4, and an indoor blower fan 6.
  • the indoor unit 25 and the outdoor unit 24 are connected by refrigerant piping, and are not used as refrigerant.
  • Azeotropic mixed refrigerant A non-chlorine HFC-based refrigerant (eg, R407C) circulates to form a refrigeration cycle. In the refrigeration cycle, the refrigerant changes to a gas, a mixture of gas and liquid (gas-liquid two-phase), and changes to a liquid.
  • the high-temperature and high-pressure gas refrigerant compressed by the compressor 1 reaches the outdoor heat exchanger 2, and the high-temperature and high-pressure gas refrigerant is deprived of heat by the air blown by the outdoor fan 7, and condenses, and the low-temperature and high-pressure gas refrigerant is condensed. Liquid refrigerant.
  • the refrigerant is sent from the outdoor unit heat exchanger 2 to the indoor expansion valve 4 via the liquid pipe 20 of the heat exchange pipe 10 and decompressed by the expansion valve 3 to become a low-temperature, low-pressure gas-liquid two-phase refrigerant. It flows into the heat exchanger 5 and takes indoor heat, that is, lowers the temperature of indoor air. Then, it returns to the compressor 1 again through the gas pipe 21 of the heat exchange pipe 10 and the gas-liquid separator 5.
  • the refrigerant R 407 C is a non-azeotropic refrigerant, it has a temperature gradient at the inlet and outlet of the refrigerant during condensation, and it is difficult to obtain sufficient supercooling. Since a part of the liquid pipe and a part of the liquid pipe are heat-exchanged by the heat exchange pipe 10 in a counter-current flow, the supercooling is greatly increased, and the efficiency of the refrigeration cycle is improved. This also prevents return of the liquid refrigerant to the compressor 1.
  • the refrigerant transport between the outdoor unit 24 and the indoor unit 25 is performed. If the lengths of the connecting pipes (refrigerant pipes) are different, the length of the heat exchange portion may be determined accordingly. Therefore, it is not necessary to design on the premise that the piping length is longer than in the case where heat is exchanged in the outdoor unit, and the material cost of the heat exchange part is reduced, and it is possible to develop a detailed system according to the cooling and heating capacity. Become.
  • Fig. 2 shows the configuration when the heat exchange pipe is independent of the outdoor unit 24 and the indoor unit 25.
  • the bold lines in Fig. 2 indicate gas pipes and the thin lines indicate liquid pipes, and heat is exchanged by brazing the straight sections of each pipe.
  • a union 11 serving as a pipe connection member is provided on one side, and a flat nut 12 is provided on the other side so as to be easily connected or replaced.
  • the brazing portion L may be prepared in advance, it is possible to select heat exchange pipes according to conditions such as cooling capacity and connection pipe length. Further, the liquid pipe may be spirally wound around the gas pipe.
  • Figure 3 shows the selection criteria for the length of the brazing section L of the heat exchange pipe 10 and the length of the on-site connection pipe.
  • the length of the brazing portion should be variable in proportion to the length of the on-site connection piping, but in practice it is difficult due to restrictions on construction. Therefore, it is desirable to determine the length of the brazed part in advance as L1 to L5, and to use a heat exchange pipe with the length of the brazed part as necessary.
  • Fig. 4 shows an example in which three heat exchange pipes 10 are connected in series.If the pipe length is long, the number of indoor units connected is large, etc., the heat exchange pipes can be connected in series and connected. And supercooling according to the connection piping length This eliminates the difference in performance between indoor units.
  • Fig. 5 shows the relationship between the number of heat exchange pipes 10 connected and the length of the on-site connection pipes, which simplifies construction. For example, if the on-site connection pipe length exceeds 90 m, it can be handled by connecting five heat exchange pipes 10.
  • Fig. 6 shows the function of the heat exchange pipe 10 and the volume of the dryer 14 and filter 13 needs to be selected according to the construction conditions. This facilitates construction and improves reliability.
  • Non-azeotropic mixed refrigerants are those in which the refrigerating machine oil that can be used is likely to absorb moisture. If the refrigerating machine oil is present in the refrigerating cycle while absorbing the moisture, the compressor may be oxidized. It is desirable to provide 3.
  • Fig. 7 shows an example of a so-called multi-type air conditioner in which a plurality of indoor units are connected to an outdoor unit.
  • the connection pipe branches in various ways, the pipe length increases, and the pressure loss increases.
  • the refrigerant discharged from the outdoor unit is liquefied as much as possible and sent to the indoor unit. Therefore, pressure loss is reduced as compared with the gas-liquid two-phase state, and as a result, the capacity difference between indoor units is compensated.
  • a pressure difference of 3 Om between the indoor units causes a pressure drop of 3 Om, resulting in a capacity difference of about 33%.
  • the outlet temperature-inlet temperature of indoor unit 1 is about 15 ° C
  • the outlet temperature-inlet temperature of indoor unit 2 is about 10 ° C
  • the pressure difference between indoor unit 1 and indoor unit 2 is 4.1 kg Z cm 2 .
  • Fig. 9 shows a multi-type air conditioner in which a common gas pipe 27 and a common liquid pipe 26 are provided, and a part of the common gas pipe 27 and a part of the common liquid pipe 26 exchange heat. It is an embodiment.
  • the common gas pipe 27 and the common liquid pipe 26 are provided, it is easy to add the indoor unit and the outdoor unit, and furthermore, a part of the common gas pipe 27 and the common liquid pipe 2 Heat exchange with a part of 6 can reduce the pressure loss due to the refrigerant piping that is the longest and is difficult to construct.As a result, the capacity difference between indoor units and between expanded indoor units can be leveled. .
  • Fig. 10 shows a multi-type air conditioner in which the HFC-based refrigerant flowing through the refrigeration cycle is used as a part of the pipe on the suction side of the compressor and the pipe through which the condensed HFC-based refrigerant flows. It is arranged so that heat is exchanged with each other in the straight pipe section with the section.A heat exchange section is provided between A and B or A and C in the figure in the housing of the outdoor unit, as shown in Fig. 11. As described above, the pipes are combined so that the flow directions of the refrigerants are opposed to each other.
  • heat is exchanged in a part of the pipe on the suction side of the compressor and in a part of a straight pipe part of the pipe through which the condensed HFC-based refrigerant flows, so that the outdoor unit is downsized.
  • the refrigerant can be supercooled by the outdoor unit, efficiency can be prevented, and the difference in performance can be leveled for each indoor unit. There is.
  • the performance of the air conditioner can be fully utilized, and the power consumption of the air conditioner itself can be reduced.
  • the capacity can be expected to increase because the supercooling can be increased at the suction part of the compressor, and the heat exchanger of the outdoor unit can be reduced by using a heat exchange pipe. It is also possible. According to the present invention, since a part of the condensed gas pipe and a part of the liquid pipe are heat-exchanged, even the HFC-based refrigerant can obtain a large amount of supercooling and improve the efficiency of the refrigeration cycle.
  • a part of a pipe on a suction side of a compressor and a part of a pipe through which condensed HFC-based refrigerant flows Since the heat is exchanged in the straight pipe section, the outdoor unit is downsized. Further, it is possible to obtain a multi-type air conditioner in which the difference in performance between the indoor units is leveled without increasing the number of refrigerant piping systems.
  • the common gas pipe and the common liquid pipe are provided to exchange heat, so that the indoor unit and the outdoor unit can be easily added, and the pressure in the refrigerant transport pipe can be increased. Loss can be reduced. Therefore, it is possible to obtain an air conditioner that can cope with environmental protection by using HFC-based refrigerants, develop the system in detail according to the cooling and heating capacity, or cope with an increase in the future air conditioning load.
  • the heat exchange since the straight pipe portions of the liquid pipe and the gas pipe are brazed in the heat exchange pipe, the heat exchange is reliable, and by changing this length, the system can be easily developed. It can respond to future increase in air conditioning load.
  • the length of the connection pipe between the outdoor unit and the indoor unit is set to 60.
  • the gas pipe and liquid pipe are connected at a length of 100 to 50 O mm when the pressure is up to 100 Om, use R407C as the refrigerant.

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

Abstract

L'invention concerne un conditionneur d'air, dans lequel une unité extérieure (24), présentant un compresseur (1) et un échangeur de chaleur extérieur (2), ainsi qu'une pluralité d'unité intérieures (25), présentant chacune un échangeur de chaleur intérieur (4) et un détendeur (3), sont connectées par l'intermédiaire de conduites de gaz (22) et de conduites de liquide (23). La chaleur est échangée entre une partie des conduites de gaz (22) et une partie des conduites de liquide (23) de sorte qu'un refroidissement très élevé peut être obtenu même pour un réfrigérant HFC et l'efficacité du cycle de réfrigération peut être améliorée. Etant donné que l'échange de chaleur est réalisé entre l'unité extérieure (24) et les unités intérieures (25) au niveau des parties des conduites de gaz et de conduites de liquide intégrées, lorsque les conduites entre l'unité extérieure (24) et les unités intérieures (25) présentent différentes longueurs, seules les longueurs des parties d'échange de chaleur sont déterminées. Par conséquent, la polyvalence est accrue et un système peut être développé en continu en fonction des capacités de refroidissement/chauffage. L'utilisation d'un réfrigérant HFC permet de protéger l'environnement, d'améliorer l'efficacité du cycle de réfrigération, de réduire les dimensions du conditionneur d'air et de le rendre recyclable.
PCT/JP1997/003333 1997-09-19 1997-09-19 Conditionneur d'air, conduite d'echange de chaleur pour ledit conditionneur d'air, et unite exterieure WO1999015841A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP1997/003333 WO1999015841A1 (fr) 1997-09-19 1997-09-19 Conditionneur d'air, conduite d'echange de chaleur pour ledit conditionneur d'air, et unite exterieure
JP51878799A JP3736809B2 (ja) 1997-09-19 1997-09-19 空気調和機

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Application Number Priority Date Filing Date Title
PCT/JP1997/003333 WO1999015841A1 (fr) 1997-09-19 1997-09-19 Conditionneur d'air, conduite d'echange de chaleur pour ledit conditionneur d'air, et unite exterieure

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WO1999015841A1 true WO1999015841A1 (fr) 1999-04-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012193897A (ja) * 2011-03-16 2012-10-11 Mitsubishi Electric Corp 冷凍サイクル装置
JP2017145975A (ja) * 2016-02-15 2017-08-24 三菱電機株式会社 冷凍サイクル装置、冷凍サイクル装置の製造方法、冷凍サイクル装置のドロップイン方法、及び、冷凍サイクル装置のリプレース方法

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JPS57196963U (fr) * 1981-06-11 1982-12-14
JPS57198568U (fr) * 1981-06-12 1982-12-16
JPS6257340U (fr) * 1985-09-30 1987-04-09
JPH0875290A (ja) * 1994-09-06 1996-03-19 Hitachi Ltd ヒートポンプ式空調装置
JPH08178451A (ja) * 1994-12-22 1996-07-12 Mitsubishi Heavy Ind Ltd 空気調和機
JPH08303899A (ja) * 1995-04-28 1996-11-22 Matsushita Seiko Co Ltd 空調機用変換器
JPH09133410A (ja) * 1995-11-06 1997-05-20 Matsushita Electric Ind Co Ltd ヒートポンプ式冷凍サイクルの制御方法と装置
JPH09152204A (ja) * 1995-11-30 1997-06-10 Toshiba Corp 冷凍サイクル
JPH09178284A (ja) * 1995-12-27 1997-07-11 Toupure Kk 空気調和装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196963U (fr) * 1981-06-11 1982-12-14
JPS57198568U (fr) * 1981-06-12 1982-12-16
JPS6257340U (fr) * 1985-09-30 1987-04-09
JPH0875290A (ja) * 1994-09-06 1996-03-19 Hitachi Ltd ヒートポンプ式空調装置
JPH08178451A (ja) * 1994-12-22 1996-07-12 Mitsubishi Heavy Ind Ltd 空気調和機
JPH08303899A (ja) * 1995-04-28 1996-11-22 Matsushita Seiko Co Ltd 空調機用変換器
JPH09133410A (ja) * 1995-11-06 1997-05-20 Matsushita Electric Ind Co Ltd ヒートポンプ式冷凍サイクルの制御方法と装置
JPH09152204A (ja) * 1995-11-30 1997-06-10 Toshiba Corp 冷凍サイクル
JPH09178284A (ja) * 1995-12-27 1997-07-11 Toupure Kk 空気調和装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012193897A (ja) * 2011-03-16 2012-10-11 Mitsubishi Electric Corp 冷凍サイクル装置
JP2017145975A (ja) * 2016-02-15 2017-08-24 三菱電機株式会社 冷凍サイクル装置、冷凍サイクル装置の製造方法、冷凍サイクル装置のドロップイン方法、及び、冷凍サイクル装置のリプレース方法

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