US20130055752A1 - Refrigerating circuit for use in a motor vehicle - Google Patents

Refrigerating circuit for use in a motor vehicle Download PDF

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Publication number
US20130055752A1
US20130055752A1 US13/603,464 US201213603464A US2013055752A1 US 20130055752 A1 US20130055752 A1 US 20130055752A1 US 201213603464 A US201213603464 A US 201213603464A US 2013055752 A1 US2013055752 A1 US 2013055752A1
Authority
US
United States
Prior art keywords
expansion valve
heat exchanger
inner heat
refrigerant
regulated
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.)
Abandoned
Application number
US13/603,464
Other languages
English (en)
Inventor
Robert Fleischhacker
Thomas Tscheppe
Bastian Freese
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Assigned to DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT reassignment DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FREESE, BASTIAN, TSCHEPPE, THOMAS, FLEISCHHACKER, ROBERT
Publication of US20130055752A1 publication Critical patent/US20130055752A1/en
Priority to US15/007,826 priority Critical patent/US20160195319A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • 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
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/06—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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3286—Constructional features
    • B60H2001/3291—Locations with heat exchange within the refrigerant circuit itself
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/068—Expansion valves combined with a sensor
    • F25B2341/0683—Expansion valves combined with a sensor the sensor is disposed in the suction line and influenced by the temperature or the pressure of the suction gas
    • 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
    • F25B2600/2513—Expansion valves

Definitions

  • the invention relates to a refrigerating circuit for use in a motor vehicle.
  • Refrigerating circuits for motor vehicles are well known.
  • a pressure line runs from the output of the compressor, through the condenser, to the input of the expansion valve.
  • the pressure is lowered in the expansion valve, and therefore the suction line is connected to the output of the expansion valve, leading through the evaporator and ending at the input of the compressor.
  • the compressor changes the state of the refrigerant in respect of pressure and temperature. In this case, the temperature at the compressor outlet is higher than the condensing temperature in the condenser since the vaporous refrigerant is highly superheated.
  • the refrigerant is still in a highly superheated state at the condenser inlet.
  • the condenser releases heat to the environment, and therefore the refrigerant is in a liquid state at the outlet of the condenser.
  • the refrigerant has a particular condensing temperature and a particular condensing pressure, that are referred to as the saturated temperature and the saturated pressure.
  • the liquid is supercooled at the condenser outlet, and hence achieves a temperature lower than the saturation temperature.
  • the refrigerant absorbs heat in the evaporator and therefore is in the vapor state at the evaporator outlet and in this way is sucked in by the compressor in the suction line.
  • the refrigerant at the evaporator output must be in a superheated gaseous state to avoid damage to the compressor.
  • a regulated expansion valve may be used to ensure that the refrigerant is in the superheated state at the output of the evaporator. In this case, the expansion valve has the temperature t E at the output of the evaporator as the controlled variable. If the refrigerant is then in a highly superheated state, i.e.
  • An inner heat exchanger may be used in the pressure and the suction line to improve efficiency of a refrigerating circuit of this kind.
  • the inner heat exchanger passes the cooled refrigerant under high pressure to the expansion valve, and the superheated expanded refrigerant is passed to the compressor.
  • the refrigerant to be condensed is supercooled further so that the proportion of liquid in the refrigerant after expansion rises and hence more liquid refrigerant is available for evaporation.
  • the inner heat exchanger thereby increases the refrigerating capacity and also the efficiency of the refrigerating circuit.
  • Improved efficiency can lead to a reduction in the power consumption of the compressor, thereby achieving reductions in fuel consumption and emissions.
  • the reduced power requirement also may be enable use of a smaller compressor.
  • the invention relates to a refrigerating circuit with a regulated expansion valve that has a detection zone arranged at the suction-side output of the inner heat exchanger.
  • This arrangement functions as a control means for ensuring that only gaseous refrigerant is present at the compressor input, while enabling the refrigerant to still be in the mixed/vapor state at the evaporator output. Only after passing through the inner heat exchanger is the refrigerant in the gaseous state. In this way, the refrigerant can be supercooled to a greater extent, thereby making it possible to improve heat release in the evaporator, this in turn having a positive effect on efficiency.
  • the refrigerating circuit of the invention ensures that the cooling capacity of the refrigerant is distributed uniformly over the entire evaporator since the refrigerant is in the wet vapor phase in the entire evaporator zone.
  • the regulated expansion valve preferably is a thermostatic expansion valve connected by a control line that is part of the suction line to the output of the inner heat exchanger.
  • the regulated expansion valve preferably is a thermostatic expansion valve with a detector arrangement with a detector in the detection zone.
  • FIG. 1 shows a schematic refrigerant circuit according to the invention.
  • FIG. 2 shows a simplified pressure-enthalpy diagram of a refrigerating circuit in accordance with FIG. 1 .
  • the refrigerating circuit of FIG. 1 has a pressure line 4 and a suction line 6 .
  • the pressure line 4 begins at the output of a compressor 8 .
  • the compressor 8 compresses the refrigerant to a condensing pressure P V , which is indicated by a change of state A in FIG. 2 .
  • the refrigerant is passed at the condensing pressure P V to a condenser 10 , in which the refrigerant releases heat so that the refrigerant is liquid at the output of the condenser 10 and has a condensing temperature t V .
  • This change of state is denoted by B in FIG. 2 .
  • the refrigerant is passed from the condenser 10 to an inner heat exchanger 12 , in which the refrigerant in the pressure line 4 releases heat to the refrigerant in the suction line 6 , as indicated by the change of state C in the pressure-enthalpy diagram of FIG. 2 .
  • the refrigerant is passed from the inner heat exchanger 12 at the pressure P V to the regulated expansion valve 14 .
  • the control of the expansion valve 14 is explained in greater detail below after the description of the complete refrigerating circuit.
  • the suction line 6 begins at the output of the expansion valve 14 and passes the refrigerant to the evaporator 16 where the refrigerant is evaporated to a greater extent and absorbs heat. In contrast to the prior art, this takes place at a constant temperature t 0 and a constant pressure P 0 .
  • the refrigerant is still in the wet vapor region at the output 17 of the evaporator 16 and not, as is customary in the prior art, in the superheated state, in which the temperature would already be elevated.
  • the state of heat absorption in the evaporator is indicated by E in FIG. 2 .
  • the refrigerant then passes through the inner heat exchanger 12 , absorbing heat from the refrigerant in the pressure line 4 and thus being superheated, as indicated by the change of state F in FIG. 2 .
  • the refrigerant then passes via the suction line 6 , through the expansion valve 14 , to the input of the compressor 8 , thereby completing the refrigerating circuit 2 .
  • the part of the suction line 6 that leads from the output of the inner heat exchanger 12 to the expansion valve 14 is a control line 18 for the regulated expansion valve 14 .
  • the suction line 6 also could be routed directly from the inner heat exchanger 12 to the compressor 8 , with a suitable detector arrangement being provided at the output of the inner heat exchanger 12 .
  • the arrangement transmits the temperature t E at the output of the heat exchanger to the regulated expansion valve 14 in a suitable manner.

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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)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
US13/603,464 2011-09-05 2012-09-05 Refrigerating circuit for use in a motor vehicle Abandoned US20130055752A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/007,826 US20160195319A1 (en) 2011-09-05 2016-01-27 Refrigerating circuit for use in a motor vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011053256A DE102011053256A1 (de) 2011-09-05 2011-09-05 Kältekreislauf zum Einsatz in einem Kraftfahrzeug
DE102011053256.0 2011-09-05

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/007,826 Division US20160195319A1 (en) 2011-09-05 2016-01-27 Refrigerating circuit for use in a motor vehicle

Publications (1)

Publication Number Publication Date
US20130055752A1 true US20130055752A1 (en) 2013-03-07

Family

ID=47710422

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/603,464 Abandoned US20130055752A1 (en) 2011-09-05 2012-09-05 Refrigerating circuit for use in a motor vehicle
US15/007,826 Abandoned US20160195319A1 (en) 2011-09-05 2016-01-27 Refrigerating circuit for use in a motor vehicle

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/007,826 Abandoned US20160195319A1 (en) 2011-09-05 2016-01-27 Refrigerating circuit for use in a motor vehicle

Country Status (6)

Country Link
US (2) US20130055752A1 (ja)
JP (1) JP5667132B2 (ja)
KR (1) KR20130026391A (ja)
CN (2) CN102980334A (ja)
DE (1) DE102011053256A1 (ja)
FR (1) FR2979695B1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2977244A1 (en) * 2014-07-24 2016-01-27 C.R.F. Società Consortile per Azioni Air conditioning system for motor-vehicles
US10571166B2 (en) * 2017-05-30 2020-02-25 Hyundai Motor Company Power generation module of vehicle air-conditioning system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104748453A (zh) * 2013-12-27 2015-07-01 比亚迪股份有限公司 一种纯电动汽车热泵空调系统及纯电动汽车
KR102200390B1 (ko) * 2014-07-16 2021-01-11 주식회사 두원공조 차량용 냉난방시스템
JP7099899B2 (ja) * 2018-07-25 2022-07-12 三菱重工サーマルシステムズ株式会社 車両用空調装置

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US2952139A (en) * 1957-08-16 1960-09-13 Patrick B Kennedy Refrigeration system especially for very low temperature
KR20020057158A (ko) * 2000-12-30 2002-07-11 신영주 차량용 공기조화장치의 냉동싸이클
US7810353B2 (en) * 2005-05-27 2010-10-12 Purdue Research Foundation Heat pump system with multi-stage compression
US20120055195A1 (en) * 2008-10-29 2012-03-08 Delphi Technologies, Inc. Internal Heat Exchanger Assembly Having an Internal Bleed Valve Assembly
US20120102989A1 (en) * 2010-10-27 2012-05-03 Honeywell International Inc. Integrated receiver and suction line heat exchanger for refrigerant systems

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2952139A (en) * 1957-08-16 1960-09-13 Patrick B Kennedy Refrigeration system especially for very low temperature
KR20020057158A (ko) * 2000-12-30 2002-07-11 신영주 차량용 공기조화장치의 냉동싸이클
US7810353B2 (en) * 2005-05-27 2010-10-12 Purdue Research Foundation Heat pump system with multi-stage compression
US20120055195A1 (en) * 2008-10-29 2012-03-08 Delphi Technologies, Inc. Internal Heat Exchanger Assembly Having an Internal Bleed Valve Assembly
US20120102989A1 (en) * 2010-10-27 2012-05-03 Honeywell International Inc. Integrated receiver and suction line heat exchanger for refrigerant systems

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2977244A1 (en) * 2014-07-24 2016-01-27 C.R.F. Società Consortile per Azioni Air conditioning system for motor-vehicles
US20160023538A1 (en) * 2014-07-24 2016-01-28 C.R.F. Società Consortile Per Azioni Air conditioning system for motor-vehicles
US9789749B2 (en) * 2014-07-24 2017-10-17 C.R.F. Società Consortile Per Azioni Air conditioning system for motor-vehicles
US10571166B2 (en) * 2017-05-30 2020-02-25 Hyundai Motor Company Power generation module of vehicle air-conditioning system

Also Published As

Publication number Publication date
CN106322858A (zh) 2017-01-11
CN102980334A (zh) 2013-03-20
DE102011053256A1 (de) 2013-03-07
JP2013052862A (ja) 2013-03-21
FR2979695A1 (fr) 2013-03-08
JP5667132B2 (ja) 2015-02-12
KR20130026391A (ko) 2013-03-13
US20160195319A1 (en) 2016-07-07
FR2979695B1 (fr) 2018-09-28

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AS Assignment

Owner name: DR. ING. H.C. F. PORSCHE AKTIENGESELLSCHAFT, GERMA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FLEISCHHACKER, ROBERT;TSCHEPPE, THOMAS;FREESE, BASTIAN;SIGNING DATES FROM 20120823 TO 20120827;REEL/FRAME:028896/0356

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION