EP4012293B1 - Refrigeration cycle device - Google Patents

Refrigeration cycle device Download PDF

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Publication number
EP4012293B1
EP4012293B1 EP19940618.2A EP19940618A EP4012293B1 EP 4012293 B1 EP4012293 B1 EP 4012293B1 EP 19940618 A EP19940618 A EP 19940618A EP 4012293 B1 EP4012293 B1 EP 4012293B1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
compressor
controller
refrigeration cycle
cycle apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19940618.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4012293A4 (en
EP4012293A1 (en
Inventor
Kenta MURATA
Takumi NISHIYAMA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP4012293A1 publication Critical patent/EP4012293A1/en
Publication of EP4012293A4 publication Critical patent/EP4012293A4/en
Application granted granted Critical
Publication of EP4012293B1 publication Critical patent/EP4012293B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0403—Refrigeration circuit bypassing means for the condenser
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0411—Refrigeration circuit bypassing means for the expansion valve or capillary tube
    • 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
    • F25B2500/07—Exceeding a certain pressure value in a refrigeration component or 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
    • F25B2500/00—Problems to be solved
    • F25B2500/26—Problems to be solved characterised by the startup of the refrigeration 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
    • F25B2600/00—Control issues
    • F25B2600/01—Timing
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2501—Bypass valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the evaporator

Definitions

  • the present invention relates to a refrigeration cycle apparatus.
  • a refrigeration cycle apparatus 100 includes an outdoor unit 110 and an indoor unit 120.
  • Indoor unit 120 is disposed in an indoor space.
  • Outdoor unit 110 is disposed outside the indoor space (outdoors).
  • Refrigerant including R290 is sealed in refrigeration cycle apparatus 100.
  • Controller 10 controls the degree of opening of expansion valve 3 such that the pressure difference between the refrigerant discharged from compressor 1 but not yet depressurized and the refrigerant depressurized but not yet suctioned into compressor 1 falls within a desired range of values.
  • Expansion valve 3 may be controlled such that the degree of superheating and the degree of supercooling of the refrigerant reach their respective target values.
  • Fig. 2 is a functional block diagram showing a configuration of controller 10 in Fig. 1 .
  • controller 10 includes circuitry 11, a memory 12, and an input/output unit 13.
  • Processing circuit 11 may be dedicated hardware or may be a central processing unit (CPU) that executes a program stored in memory 12.
  • circuitry 11 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a combination thereof.
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • circuitry 11 is a CPU
  • the function of controller 10 is implemented by software, firmware, or a combination of software and firmware.
  • Software or firmware is described as a program and stored in memory 12.
  • Memory 12 includes a nonvolatile or volatile semiconductor memory (for example, a random access memory (RAM), a read only memory (ROM), a flash memory, an erasable programmable read only memory (EPROM) or an electrically erasable programmable read only memory (EEPROM)), a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a digital versatile disc (DVD).
  • RAM random access memory
  • ROM read only memory
  • EPROM erasable programmable read only memory
  • EEPROM electrically erasable programmable read only memory
  • the CPU is also referred to as a central processing unit, a processing unit, a computing unit, a microprocessor, a microcomputer, a processor, or a digital signal processor (DSP).
  • DSP digital signal processor
  • controller 10 determines whether a reference time period Tm1 has elapsed or not since activation of compressor 1.
  • Reference time period Tm1 is determined as appropriate by experiments by real machines or simulations.
  • controller 10 waits for a prescribed time period in S106, and then returns the process to S105.
  • controller 10 determines in S107 whether or not temperature T1 is higher than a reference temperature Trf1.
  • Reference temperature Trf1 is determined as appropriate by experiments by real machines or simulations.
  • Gas-liquid separator 45 receives the refrigerant from heat exchanger 42, separates the received refrigerant into gas refrigerant and liquid refrigerant, stores the liquid refrigerant therein, and guides the gas refrigerant to compressor 41. Gas-liquid separator 45 prevents the liquid refrigerant from being suctioned into compressor 41. Gas-liquid separator 45 includes an accumulator or a suction muffler.
  • controller 40 allows discharge port Pd of compressor 41 to communicate with heat exchanger 42, and allows suction ports Ps1 and Ps2 of compressor 41 to communicate with heat exchanger 44.
  • controller 40 allows ports P1 and P2 to communicate with each other.
  • controller 40 operates compression mechanisms 411 and 412. From temperature sensor TS4, controller 40 acquires a temperature T4 of the refrigerant flowing out of heat exchanger 44 in the heating operation.
  • controller 50 allows a discharge port of compressor 51 to communicate with heat exchanger 52, and allows a suction port of compressor 51 to communicate with heat exchanger 54. Controller 50 does not activate heater 57 in the normal mode of the heating operation. From temperature sensor TS5, controller 50 acquires a temperature T5 of the refrigerant having flowed through a heating portion of heater 57 in the heating operation. This heating portion is included in a flow path through which the refrigerant flowing between heat exchanger 54 and compressor 51 in the heating operation passes.
  • controller 50 determines whether a reference time period Tm5 has elapsed or not since activation of compressor 51. Reference time period Tm5 is determined as appropriate by experiments by real machines or simulations. When reference time period Tm5 has not elapsed since activation of compressor 51 (NO in S505), controller 50 waits for a prescribed time period in S506 and then returns the process to S505. When reference time period Tm5 has elapsed since activation of compressor 51 (YES in S505), then in S507, controller 50 determines whether or not temperature T5 is higher than a reference temperature Trf5. Reference temperature Trf5 is determined as appropriate by experiments by real machines or simulations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)
EP19940618.2A 2019-08-07 2019-08-07 Refrigeration cycle device Active EP4012293B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/031273 WO2021024443A1 (ja) 2019-08-07 2019-08-07 冷凍サイクル装置

Publications (3)

Publication Number Publication Date
EP4012293A1 EP4012293A1 (en) 2022-06-15
EP4012293A4 EP4012293A4 (en) 2022-08-10
EP4012293B1 true EP4012293B1 (en) 2024-07-10

Family

ID=74503174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940618.2A Active EP4012293B1 (en) 2019-08-07 2019-08-07 Refrigeration cycle device

Country Status (3)

Country Link
EP (1) EP4012293B1 (https=)
JP (1) JP7361777B2 (https=)
WO (1) WO2021024443A1 (https=)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240310092A1 (en) * 2021-03-24 2024-09-19 Mitsubishi Electric Corporation Refrigeration cycle apparatus
CN115993016B (zh) * 2022-12-02 2025-09-09 珠海格力电器股份有限公司 空调系统、空调机组及控制方法
CN116007248B (zh) * 2022-12-22 2026-04-21 无锡市好冰冷暖技术有限公司 一种制冷及化霜系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103570U (ja) * 1991-02-13 1992-09-07 株式会社富士通ゼネラル 空気調和機の制御回路
JPH05196309A (ja) * 1992-01-22 1993-08-06 Daikin Ind Ltd 空調機の運転制御方法
JPH05306841A (ja) * 1992-05-01 1993-11-19 Mitsubishi Heavy Ind Ltd 空気調和装置
JP5036593B2 (ja) * 2008-02-27 2012-09-26 パナソニック株式会社 冷凍サイクル装置
US9279608B2 (en) * 2010-07-29 2016-03-08 Mitsubishi Electric Corporation Heat pump
JP6370545B2 (ja) 2013-11-13 2018-08-08 三菱重工サーマルシステムズ株式会社 ヒートポンプシステム
US20170102175A1 (en) * 2015-10-08 2017-04-13 Lennox Industries Inc. System and Method to Eliminate High Pressure Surges in HVAC Systems
AU2015415001B2 (en) * 2015-11-20 2019-08-29 Mitsubishi Electric Corporation Refrigeration Cycle Apparatus
JP6738157B2 (ja) * 2016-02-26 2020-08-12 サンデン・オートモーティブクライメイトシステム株式会社 車両用空気調和装置

Also Published As

Publication number Publication date
EP4012293A4 (en) 2022-08-10
EP4012293A1 (en) 2022-06-15
JP7361777B2 (ja) 2023-10-16
JPWO2021024443A1 (https=) 2021-02-11
WO2021024443A1 (ja) 2021-02-11

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