WO2016088262A1 - Appareil à cycle de réfrigération - Google Patents

Appareil à cycle de réfrigération Download PDF

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Publication number
WO2016088262A1
WO2016088262A1 PCT/JP2014/082295 JP2014082295W WO2016088262A1 WO 2016088262 A1 WO2016088262 A1 WO 2016088262A1 JP 2014082295 W JP2014082295 W JP 2014082295W WO 2016088262 A1 WO2016088262 A1 WO 2016088262A1
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WO
WIPO (PCT)
Prior art keywords
water
heat exchanger
side heat
heat medium
refrigeration cycle
Prior art date
Application number
PCT/JP2014/082295
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English (en)
Japanese (ja)
Inventor
拓也 伊藤
和之 石田
靖 大越
昂仁 彦根
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to EP14907314.0A priority Critical patent/EP3228951B1/fr
Priority to PCT/JP2014/082295 priority patent/WO2016088262A1/fr
Priority to JP2016562178A priority patent/JP6410839B2/ja
Publication of WO2016088262A1 publication Critical patent/WO2016088262A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • 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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B2313/004—Outdoor 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
    • 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
    • F25B2400/06—Several compression cycles arranged in parallel

Definitions

  • the present invention relates to a refrigeration cycle apparatus.
  • Patent Document 1 when a plurality of refrigerant circuits are connected to one plate heat exchanger, if one refrigerant circuit fails, other normal refrigerant circuits cannot be operated. There is a problem.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a refrigeration cycle apparatus that can continue operation even if any of a plurality of refrigerant circuits fails. .
  • a refrigeration cycle apparatus includes a plurality of refrigeration units in which a compressor, a refrigerant flow switching device, an air side heat exchanger, a pressure reducing device, and a heat medium side heat exchanger are sequentially connected via a refrigerant pipe and the refrigerant circulates.
  • a heat medium side heat exchanger wherein the heat medium side heat exchanger exchanges heat between the heat medium and the refrigerant, and the heat medium side heat exchanger of one or more of the refrigeration cycles is connected to the first heat medium
  • a second heat medium flow path in which the heat medium side heat exchangers of two or more of the refrigeration cycles are connected in series along the flow of the heat medium, the first heat The medium flow path and the second heat medium flow path are arranged in parallel.
  • the refrigeration cycle apparatus by connecting a plurality of refrigeration cycles in parallel and in series, the operation of the refrigeration cycle apparatus can be continued even if any refrigeration cycle fails.
  • Embodiment 1 is a schematic configuration diagram of a refrigeration cycle apparatus according to Embodiment 1 of the present invention. It is a flowchart which shows operation
  • FIG. 1 is a schematic configuration diagram showing an example of a part of the configuration of the refrigeration cycle apparatus according to Embodiment 1 of the present invention.
  • refrigeration cycles 2 a, 2 b, 2 c, 2 d and a heat source unit controller 11 having the same circuit configuration and the same specifications are mounted in a heat source unit 1 that is a part of the refrigeration cycle unit.
  • what has a plurality of identical devices such as the refrigeration cycles 2a, 2b, 2c, and 2d may be collectively described as the refrigeration cycle 2.
  • a compressor 3a In the refrigeration cycle 2a, a compressor 3a, a refrigerant flow switching device 4a such as a four-way valve, an air side heat exchanger 5a, a main expansion valve 7a, and a water side heat exchanger 8a are connected in a ring shape through a refrigerant pipe. Yes.
  • An air-side heat exchanger blower 6a is installed in the vicinity of the air-side heat exchanger 5a.
  • the refrigeration cycles 2b, 2c and 2d have the same configuration as the refrigeration cycle 2a.
  • the compressors 3a, 3b, 3c, and 3d suck low-temperature and low-pressure refrigerant and compress the refrigerant into a high-temperature and high-pressure state.
  • a plurality of identical devices such as the compressors 3 a, 3 b, 3 c, and 3 d may be collectively described as the compressor 3.
  • the refrigerant flow switching devices 4a, 4b, 4c and 4d are for switching between the refrigerant flow during the cooling operation and the refrigerant flow during the heating operation.
  • what has a plurality of identical devices such as the refrigerant flow switching devices 4a, 4b, 4c, and 4d may be collectively described as the refrigerant flow switching device 4.
  • the air-side heat exchangers 5a, 5b, 5c, and 5d function as condensers during the cooling operation, and function as evaporators during the heating operation.
  • the air-side heat exchanger blowers 6a, 6b, 6c, and 6d such as fans. Heat exchange is performed between the air supplied from the refrigerant and the refrigerant.
  • air side heat exchanger 5a, 5b, 5c, and 5d it may describe collectively like the air side heat exchanger 5.
  • FIG. Similarly, a plurality of identical devices such as air-side heat exchanger blowers 6a, 6b, 6c and 6d may be collectively described as an air-side heat exchanger blower 6.
  • the main expansion valves 7a, 7b, 7c and 7d have a function as a pressure reducing valve or an expansion valve, expand the refrigerant by decompressing it, and can control the opening degree variably, for example, an electronic expansion valve Etc.
  • main expansion valve 7a, 7b, 7c, and 7d may be described collectively like the main expansion valve 7.
  • the heat source apparatus control device 11 receives the pressure and temperature of the refrigerant in the refrigeration cycle 2 and the temperature data of water serving as a heat medium from various sensors (not shown), and operates the heat source apparatus 1 and uses the refrigeration cycle apparatus. Based on the operation content instructed by the operator, the compressor 3 is operated and stopped or the rotational speed is controlled, the opening degree of the main expansion valve 7 is controlled, and the rotation control of the air-side heat exchanger blower 6 is performed. Control each actuator.
  • the water-side heat exchangers 8a, 8b, 8c, and 8d exchange heat between the refrigerant that flows through the refrigeration cycle 2 and water that is a heat medium.
  • the water inlet side of the water side heat exchanger 8a and the water side heat exchanger 8b is connected in parallel by a water pipe 9a.
  • the water outlet side of the water side heat exchanger 8c and the water side heat exchanger 8d is connected in parallel by a water pipe 9b.
  • the water outlet side of the water side heat exchanger 8a and the water inlet side of the water side heat exchanger 8c are connected in series by a water pipe 9c.
  • the water outlet side of the water side heat exchanger 8b and the water inlet side of the water side heat exchanger 8d are connected in series by a water pipe 9d.
  • the water side heat exchangers 8a, 8b, 8c and 8d correspond to the “heat medium side heat exchanger” in the present invention.
  • the water pipes 9c and 9d correspond to the “first heat medium flow path” and the “second heat medium flow path” in the present invention, respectively.
  • a plurality of identical devices such as the water-side heat exchangers 8a, 8b, 8c, and 8d may be collectively described as the water-side heat exchanger 8.
  • the refrigerant flow switching device 4a switches between the refrigerant flow during the cooling operation and the refrigerant flow during the heating operation.
  • the high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 3a flows into the water-side heat exchanger 8a, performs heat exchange with water as a heat medium, and condenses and liquefies. Accordingly, the temperature of water as the heat medium rises and becomes hot water.
  • the high-pressure liquid refrigerant exiting the water-side heat exchanger 8a is decompressed by the main expansion valve 7a and becomes a gas-liquid two-phase refrigerant. And while evaporating and gasifying with the air side heat exchanger 5a used as an evaporator, it draws heat from the surrounding air and becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant that has left the air-side heat exchanger 5a is sucked into the compressor 3a.
  • the refrigerant flow switching device 4 is switched so that the refrigerant flows during the cooling operation, and the compressor 3 is operated. And there exists a method of defrosting the air side heat exchanger 5 using the heat source of the water which passes the water side heat exchanger 8.
  • FIG. Here, if heating operation is performed in a plurality of refrigeration cycles 2, if one or more refrigeration cycles 2 perform a defrosting operation, water heated during the heating operation is cooled, A decrease in the temperature of the heat medium, water, occurs.
  • FIG. 2 is a flowchart showing the operation of the heat source device control device 11 during the defrosting operation according to Embodiment 1 of the present invention.
  • the control operation of the heat source machine control device 11 will be described based on the steps of FIG. 2 with reference to FIG.
  • Step S1 The heat source machine control device 11 determines whether the four refrigeration cycles 2a, 2b, 2c, and 2d are set to perform the defrosting operation at the same time. If the four refrigeration cycles 2a, 2b, 2c, and 2d are set to perform the defrosting operation at the same time, the process proceeds to step S2, and otherwise, the process proceeds to step S4.
  • Step S2 The heat source device control device 11 determines whether at least one of the four refrigeration cycles 2a, 2b, 2c, and 2d performs a defrosting operation. If at least one performs the defrosting operation, the process proceeds to step S3, and otherwise, the process proceeds to step S1.
  • Step S3 The heat source device control device 11 simultaneously defrosts the four refrigeration cycles 2a, 2b, 2c and 2d. Thereafter, the process proceeds to step S1.
  • Step S4 The heat source device control device 11 determines whether any one of the four refrigeration cycles 2a, 2b, 2c, and 2d performs the defrosting operation. If even one defrosting operation is performed, the process proceeds to step S5, and otherwise, the process proceeds to step S1.
  • Step S5 The heat source machine control device 11 determines whether another refrigeration cycle 2 is performing a defrosting operation. If the other refrigeration cycle 2 is not defrosting, the process proceeds to step S6, and otherwise, the process proceeds to step S1.
  • Step S6 The heat source machine control device 11 performs a defrosting operation of the target refrigeration cycle 2. Thereafter, the process proceeds to step S1.
  • the water side heat exchanger 8 provided in the refrigeration cycle 2 is independent.
  • the other refrigeration cycles 2 can be operated quickly.
  • the heat source device 1 includes four refrigeration cycles 2 in the first embodiment.
  • the present invention is not limited to this, and it is sufficient that three or more refrigeration cycles 2 are provided. The same applies to Embodiments 3 and 4 described later.
  • FIG. 3 is a schematic configuration diagram showing an example in which the circuit configuration of the refrigeration cycle apparatus according to Embodiment 1 of the present invention is changed.
  • the combination of the water pipes 9 can be changed.
  • the refrigeration cycle apparatus shows an example in which the combination of the water pipes 9 is changed.
  • the water inlet side of the water side heat exchanger 8a is connected by a water pipe 9h.
  • the water outlet side of the water side heat exchanger 8a and the water inlet side of the water side heat exchanger 8b are connected in series by a water pipe 9i.
  • the water outlet side of the water side heat exchanger 8b and the water inlet side of the water side heat exchanger 8d are connected in series by a water pipe 9j.
  • the water outlet side of the water side heat exchanger 8d and the water inlet side of the water side heat exchanger 8c are connected in series by a water pipe 9k.
  • the water exit side of the water side heat exchanger 8c is connected by the water piping 9l.
  • the water side heat exchangers 8a, 8b, 8d, and 8c are sequentially connected in series.
  • the chilled water pump 10 conveys water, which is a heat medium, as shown by a dotted arrow in FIG. 3, passes through the water pipe 9 h, and flows into the water-side heat exchanger 8 a.
  • the water that has flowed out of the water-side heat exchanger 8a passes through the water pipe 9i and flows into the water-side heat exchanger 8b.
  • the water that has flowed out of the water-side heat exchanger 8b passes through the water pipe 9j and flows into the water-side heat exchanger 8d.
  • the water that has flowed out of the water-side heat exchanger 8d passes through the water pipe 9k and flows into the water-side heat exchanger 8c.
  • the water exiting the water-side heat exchanger 8c passes through the water pipe 9l and is conveyed outside the heat source unit 1.
  • the range of use of the flow rate of the water flowing through the heat source unit 1 is determined by freezing of the water-side heat exchanger 8, performance deterioration, or vibration restrictions due to pulsation. Comparing the heat source unit 1 in the first embodiment and the heat source unit 1 in the third embodiment, the heat source unit 1 in the first embodiment branches water at the water pipe 9a, so the maximum flow rate and the minimum flow rate of water are It becomes larger (see FIG. 1). On the other hand, since the heat source unit 1 in the third embodiment does not branch water through the water pipe 9h, the maximum flow rate and the minimum flow rate of water are small (see FIG. 3).
  • the configuration of the water pipe 9 in the heat source unit 1 in the first embodiment and the heat source unit 1 in the third embodiment can be made only by changing the rearrangement of the water pipe 9. Thereby, when it is desired to change the maximum flow rate and the minimum flow rate of the water flowing through the water pipe 9, it is possible only by changing the combination of the water pipes 9.
  • the flow range can be easily changed by changing the combination of the water pipes 9 without constructing the refrigerant pipe of the heat source unit 1. It is possible to obtain the heat source device 1 that performs the above.
  • the water inlet side of the water side heat exchanger 8a and the water side heat exchanger 8b is connected in parallel by a water pipe 9e.
  • the water outlet side of the water side heat exchanger 8c and the water side heat exchanger 8d is connected in parallel by a water pipe 9f.
  • the water outlet side of the water side heat exchanger 8a and the water outlet side of the water side heat exchanger 8b are connected in parallel by a water pipe 9g, and the water outlet side and the water side of the water side heat exchanger 8c are connected.
  • the water outlet side of the heat exchanger 8d is connected in parallel by a water pipe 9g.
  • the water piping 9g has connected the water side heat exchanger 8a and the water side heat exchanger 8b which were connected in parallel, the water side heat exchanger 8c, and the water side heat exchanger 8d in series.
  • the water pipes 9e, 9f, and 9g correspond to the “heat medium flow path” in the present invention.
  • the chilled water pump 10 conveys water as a heat medium, passes through the water pipe 9e, and branches into the water side heat exchanger 8a and the water side heat exchanger 8b.
  • the water that has flowed into the water-side heat exchanger 8a and the water-side heat exchanger 8b joins through the water pipe 9g.
  • the joined water branches downstream of the water pipe 9g and flows into the water side heat exchanger 8c and the water side heat exchanger 8d. Thereafter, the water that has exited the water-side heat exchanger 8c and the water-side heat exchanger 8d merges through the water pipe 9f and is transported outside the heat source unit 1.
  • the refrigeration cycle 2 performing the defrosting operation can suppress the influence on the refrigeration cycle 2 performing the other heating operation, a stable heating operation can be performed.
  • the refrigeration cycle 2a or the refrigeration cycle 2b performs the defrosting operation
  • the water that has flowed out of the refrigeration cycle 2a and the refrigeration cycle 2b is once merged in the water pipe 9g, and therefore, to the refrigeration cycle 2c and the refrigeration cycle 2d.
  • the drop in the temperature of the incoming water is reduced. For this reason, the heating operation in the refrigeration cycle 2c and the refrigeration cycle 2d is stabilized.
  • water outlet side of the water side heat exchanger 8a and the water inlet side of the water side heat exchanger 8b are connected in series by a water pipe 9q.
  • the water outlet side of the water side heat exchanger 8d and the water inlet side of the water side heat exchanger 8c are connected in series by a water pipe 9r.
  • the valve 12 installed on the water pipe 9 will be described.
  • the water pipe 9m is provided with a branching portion 13a that branches into the water-side heat exchanger 8a and the water-side heat exchanger 8b.
  • a valve 12a is installed between the branch portion 13a and the refrigerant inlet side of the water-side heat exchanger 8b.
  • the water pipe 9n is provided with a branch portion 13b that branches to the water side heat exchanger 8c and the water side heat exchanger 8d.
  • a valve 12b is installed between the branch portion 13b and the refrigerant outlet side of the water side heat exchanger 8d.
  • Valves 12c, 12d and 12e are installed on the water pipe 9q, the water pipe 9r and the water pipe 9o, respectively.
  • the valve 12 may be an electromagnetic valve that can block the flow of water, or may be a flow rate adjusting valve that can be variably controlled in opening.
  • the heat source device control device 11 can change the combination of the water pipes 9 through which water flows by switching the valve 12 according to the operation status of the heat source device 1. And the heat-source equipment control apparatus 11 can change the flow range of the water which distribute
  • the heat source device control device 11 can change the flow range of the water flowing through the heat source device 1 by changing the combination of the water pipes 9 through which the water flows by switching the valve 12. Thereby, remodeling work of the water pipe 9 becomes unnecessary, the flow rate of the water flowing through the heat source unit 1 is controlled by controlling the heat source unit control device 11 at the site, transmitting a signal to the valve 12, and operating the valve 12. The range can be changed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

L'objectif de la présente invention est d'obtenir un appareil à cycle de réfrigération qui peut continuer de fonctionner même s'il y a une défaillance dans l'un quelconque parmi une pluralité de ses circuits de réfrigérant et qui est exempt d'instabilité de la température d'un milieu qui est refroidi lorsque l'un quelconque des circuits de réfrigérant exécute une opération de dégivrage alors que la pluralité de circuits de réfrigérant exécute une opération de chauffage. Un échangeur thermique côté eau (8a) et un échangeur thermique côté eau (8c) sont raccordés en série par l'intermédiaire d'un tuyau d'eau, l'échangeur thermique côté eau (8b) et l'échangeur thermique côté eau (8d) sont raccordés en série par l'intermédiaire d'un tuyau d'eau, et l'échangeur thermique côté eau (8a) et l'échangeur thermique côté eau (8c), qui sont raccordés en série l'un avec l'autre, sont raccordés en parallèle avec l'échangeur thermique côté eau (8b) et l'échangeur thermique côté eau (8d), qui sont raccordés en série l'un avec l'autre, par l'intermédiaire d'un tuyau d'eau.
PCT/JP2014/082295 2014-12-05 2014-12-05 Appareil à cycle de réfrigération WO2016088262A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14907314.0A EP3228951B1 (fr) 2014-12-05 2014-12-05 Appareil à cycle de réfrigération
PCT/JP2014/082295 WO2016088262A1 (fr) 2014-12-05 2014-12-05 Appareil à cycle de réfrigération
JP2016562178A JP6410839B2 (ja) 2014-12-05 2014-12-05 冷凍サイクル装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/082295 WO2016088262A1 (fr) 2014-12-05 2014-12-05 Appareil à cycle de réfrigération

Publications (1)

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WO2016088262A1 true WO2016088262A1 (fr) 2016-06-09

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EP (1) EP3228951B1 (fr)
JP (1) JP6410839B2 (fr)
WO (1) WO2016088262A1 (fr)

Cited By (6)

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WO2018211682A1 (fr) * 2017-05-19 2018-11-22 三菱電機株式会社 Appareil de refroidissement et système de réglage de température par circulation d'eau
WO2019026234A1 (fr) * 2017-08-03 2019-02-07 三菱電機株式会社 Dispositif à cycle frigorifique
WO2019167250A1 (fr) * 2018-03-02 2019-09-06 三菱電機株式会社 Climatiseur
WO2019171486A1 (fr) * 2018-03-07 2019-09-12 三菱電機株式会社 Dispositif source de chaleur et système à cycle frigorifique
CN110617644A (zh) * 2019-10-18 2019-12-27 珠海格力节能环保制冷技术研究中心有限公司 换热系统、空调器及空调器的控制方法
JP7414586B2 (ja) 2020-02-28 2024-01-16 住友重機械工業株式会社 極低温冷凍機用圧縮機システムおよび補助冷却装置

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JPWO2021024404A1 (ja) * 2019-08-07 2021-12-23 三菱電機株式会社 チリングユニット及び空気調和システム

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GB2578373B (en) * 2017-05-19 2021-02-24 Mitsubishi Electric Corp Chilling unit and temperature control system using water circulation
US11181304B2 (en) 2017-05-19 2021-11-23 Mitsubishi Electric Corporation Chilling unit and temperature control system using water circulation
JPWO2018211682A1 (ja) * 2017-05-19 2019-12-12 三菱電機株式会社 チリングユニット及び水循環温調システム
GB2578373A (en) * 2017-05-19 2020-05-06 Mitsubishi Electric Corp Chilling unit and water-circulating temperature-adjustment system
WO2018211682A1 (fr) * 2017-05-19 2018-11-22 三菱電機株式会社 Appareil de refroidissement et système de réglage de température par circulation d'eau
WO2019026234A1 (fr) * 2017-08-03 2019-02-07 三菱電機株式会社 Dispositif à cycle frigorifique
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JP6410839B2 (ja) 2018-10-24

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