US20120125041A1 - Refrigeration Cycle - Google Patents

Refrigeration Cycle Download PDF

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Publication number
US20120125041A1
US20120125041A1 US13/388,037 US201013388037A US2012125041A1 US 20120125041 A1 US20120125041 A1 US 20120125041A1 US 201013388037 A US201013388037 A US 201013388037A US 2012125041 A1 US2012125041 A1 US 2012125041A1
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US
United States
Prior art keywords
refrigerant
orifice
pressure difference
pressure
flow rate
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
US13/388,037
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English (en)
Inventor
Tetsuya Ishizeki
Atsuo Inoue
Masato Tsuboi
Kenichi Suzuki
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.)
Sanden Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to SANDEN CORPORATION reassignment SANDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INOUE, ATSUO, ISHIZEKI, TETSUYA, SUZUKI, KENICHI, TSUBOI, MASATO
Publication of US20120125041A1 publication Critical patent/US20120125041A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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
    • B60H1/3205—Control means therefor
    • B60H1/3216—Control means therefor for improving a change in operation duty of a compressor in a vehicle
    • 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
    • F25B40/02—Subcoolers
    • 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
    • B60H2001/3269—Cooling devices output of a control signal
    • B60H2001/327—Cooling devices output of a control signal related to a compressing unit
    • B60H2001/3273—Cooling devices output of a control signal related to a compressing unit related to the operation of the vehicle, e.g. the compressor driving torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1202—Torque on the axis
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F25B2339/0445—Condensers with an integrated receiver with throttle portions
    • 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
    • F25B2500/19—Calculation of parameters
    • 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
    • F25B2700/13—Mass flow of refrigerants
    • F25B2700/133—Mass flow of refrigerants through 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/17—Speeds
    • F25B2700/171—Speeds of the compressor
    • 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
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • 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
    • F25B2700/19—Pressures
    • F25B2700/195—Pressures of 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator

Definitions

  • the present invention relates to a refrigeration cycle, and specifically, to a refrigeration cycle which can achieve a precise estimation of a compressor torque via a precise estimation of a refrigerant flow rate easily by a compact structure and which is suitable in use for an air conditioning system for vehicles, etc.
  • a technology is known wherein a subcool condenser, which is integrally provided with a condensing part for refrigerant compressed by the compressor, a liquid receiver for condensed refrigerant and a subcooling part for supercooling refrigerant sent from the liquid receiver, is used as the condenser, thereby improving the performance of the refrigeration cycle, in particular, the coefficient of performance (for example, Patent document 1).
  • a flow rate of refrigerant at that time is frequently used, and therefore, if the flow rate of refrigerant can be estimated precisely, the compressor torque can also be estimated accurately.
  • the compressor torque can also be estimated accurately.
  • it is known to be effective to use a pressure difference between pressures at an upstream side and a downstream side in an appropriate zone in a refrigerant circuit (in particular, a refrigerant circuit containing a liquid phase), and in order to give a clear pressure difference within a short zone in the circuit, it is effective usually to provide an orifice.
  • Patent document 1 JP-A-6-50615
  • an object of the present invention is to provide a refrigeration cycle suitable for an air conditioning system for vehicles, wherein a flow rate of refrigerant which is used to estimate a torque of a compressor can be precisely estimated by accurately detecting a difference between pressures at upstream and downstream sides of an orifice having a high correlation with the refrigerant flow rate, and ultimately, the torque of the compressor can be precisely estimated, and by performing this estimation based on the detection by a pressure difference detection means incorporated into a specified place efficiently, space saving and cost down can be achieved.
  • a refrigeration cycle has a compressor for refrigerant, a subcool condenser which is integrally provided with a condensing part for compressed refrigerant, a liquid receiver for condensed refrigerant and a subcooling part for supercooling refrigerant sent from the liquid receiver, a pressure-reduction and expansion mechanism for reducing in pressure and expanding refrigerant sent from the subcool condenser, and an evaporator for evaporating refrigerant sent from the pressure-reduction and expansion mechanism, and is characterized in that an orifice for throttling a flow of refrigerant which has passed through the condensing part is disposed in the subcool condenser, a pressure difference detection means capable of detecting a pressure difference between pressures at upstream and downstream positions of the orifice in a refrigerant flow direction is provided, and provided are a refrigerant flow rate estimation means for estimating a flow rate of refrigerant
  • the detection of a pressure difference between pressures at upstream and downstream positions of an orifice in a refrigerant flow direction which becomes a basis of a precise estimation of the flow rate of refrigerant, ultimately, a basis of a precise estimation of the compressor torque, is carried out by disposing the orifice within the subcool condenser, more concretely, by disposing the orifice for throttling the flow of the refrigerant which has passed through the subcooling part thereof within the subcool condenser.
  • the orifice Since the orifice is disposed in a specified region in the subcool condenser, it is not necessary to incorporate the orifice itself into a refrigerant circuit as a separate device, and it can be treated as a device preassembled in the subcool condenser and the subcool condenser incorporated with the orifice can be treated as a single device. Namely, by a single device which is the subcool condenser incorporated with the orifice, in addition to the essential functions of condensing and supercooling of the subcool condenser, an object up to the detection of the pressure difference can be achieved. As a result, the refrigeration cycle assembling the orifice for the detection of the pressure difference can be realized while achieving space saving and cost down.
  • the orifice is disposed relatively to the refrigerant which has passed through the condensing part in the subcool condenser, the pressure difference between pressures at the upstream and downstream sides of the orifice is detected in a region where the refrigerant is in a stable condition of mainly liquid phase, a precise detection of the pressure difference can be carried out efficiently.
  • the precise detection of the pressure difference enables a precise estimation of the refrigerant flow rate, and ultimately, enables a precise estimation of the compressor torque.
  • the above-described orifice may be provided between the condensing part and the liquid receiver in the subcool condenser, and may be provided between the liquid receiver and the subcooling part in the subcool condenser. At any position of these, a precise detection of the pressure difference in a stable refrigerant region of mainly liquid phase is possible.
  • the detection of a pressure at an upstream position of the orifice in the refrigerant flow direction may be carried out at an immediate upstream side of the orifice.
  • the detection of a pressure at a downstream position of the orifice in the refrigerant flow direction may be carried out at an immediate downstream position of the orifice, in consideration of the disposition and the easiness of assembly of the pressure sensing part, it is preferably carried out at an exit of the subcooling part. Because a relatively stable refrigerant flow can be expected in the subcooling part, a factor of fluctuation due to passing of refrigerant through the subcooling part is very small.
  • the above-described pressure difference detection means can be formed as means for detecting the pressure difference by calculating a difference between pressures detected by a first pressure sensor for detecting a pressure at an upstream position of the orifice in the refrigerant flow direction and a second pressure sensor different from the first pressure sensor for detecting a pressure at a downstream position of the orifice in the refrigerant flow direction.
  • the first pressure sensor and the second pressure sensor can detect pressures independently from each other, and a desired pressure difference can be calculated and detected by determining a difference between both detected amounts.
  • the above-described refrigerant flow rate estimation means can also estimate a flow rate of refrigerant with reference to the pressure difference detected by the pressure difference detection means and with reference to an amount detected by the first pressure sensor and/or the second pressure sensor.
  • the above-described compressor torque estimation means can estimate a torque of the compressor with reference to a flow rate of refrigerant estimated by the refrigerant flow rate estimation means, a physical amount having a correlation with a suction pressure of the compressor, a physical amount having a correlation with a rotational speed of the compressor, and an amount detected by the first pressure sensor.
  • the above-described pressure difference detection means is formed as means for detecting the pressure difference by a pressure difference sensor which directly detects a pressure difference between pressures at upstream and downstream positions of the orifice in the refrigerant flow direction.
  • a pressure difference sensor which directly detects a pressure difference between pressures at upstream and downstream positions of the orifice in the refrigerant flow direction.
  • Such a refrigeration cycle according to the present invention is suitable, in particular, for use in an air conditioning system for vehicles which strongly requires space saving and cost down.
  • FIG. 1 is a schematic diagram of a refrigeration cycle according to an embodiment of the present invention.
  • FIG. 2 depicts diagrams in characteristics showing examples of P-h diagrams of the refrigeration cycle depicted in FIG. 1 .
  • FIG. 1 shows a schematic structure of a refrigeration cycle according to an embodiment of the present invention.
  • symbol 1 indicates the whole of a refrigeration cycle
  • refrigeration cycle 1 has a compressor 2 for compressing refrigerant, a subcool condenser 3 for condensing the compressed refrigerant and carrying out up to supercooling the refrigerant, an expansion valve 4 as a pressure reduction-expansion mechanism for pressure reducing and expanding the refrigerant sent from the subcool condenser 3 , and an evaporator 5 for evaporating the refrigerant sent from the expansion valve 4 .
  • Subcool condenser 3 is structured as a device integrally provided with a condensing part 6 for refrigerant, a liquid receiver 7 for the refrigerant condensed at the condensing part 6 , and a subcooling part 8 for supercooling the refrigerant sent from the liquid receiver 7 .
  • condensing part 6 and subcooling part 8 a plurality of heat exchange tubes are disposed in parallel. As shown by arrows in the figure, the refrigerant from compressor 2 is sent to condensing part 6 , after being turned twice and passing through three passes, it is sent to liquid receiver 7 , and after it is sent from liquid receiver 7 to subcooling part 8 , it is sent from the exit of subcooling part 8 to expansion valve 4 .
  • an orifice 9 for throttling the flow of the refrigerant which has passed through condensing part 6 is disposed, and in this embodiment, orifice 9 is provided in a communication path 10 between condensing part 6 and liquid receiver 7 . Where, this orifice 9 may be provided in a communication path 11 between liquid receiver 7 and subcooling part 8 as aforementioned.
  • a pressure difference detection means capable of detecting a pressure difference between pressures at upstream and downstream positions of orifice 9 in the refrigerant flow direction.
  • a first pressure sensor 12 is provided at a downstream side of condensing part 6 and at an upstream side of orifice 9
  • a second pressure sensor 13 is provided at an exit of subcooling part 8
  • a difference between the amounts detected by both sensors 12 , 13 is calculated by a pressure difference calculation means 14 as a pressure difference to be detected in the present invention.
  • the first pressure sensor 12 may be provided at an upstream position of the orifice 9 .
  • second pressure sensor 13 at the downstream position of orifice 9 may be disposed at an immediate downstream position of orifice 9 , in consideration of easiness of assembly and a condition where the refrigerant state in subcooling part 8 is relatively stable, it is preferred to dispose it at the exit of subcooling part 8 as described above.
  • the detection of the pressure difference can be carried out by a pressure difference sensor (not depicted) which directly detects a pressure difference between pressures at upstream and downstream positions of orifice 9 in the refrigerant flow direction, except the above-described structure providing first pressure sensor 12 and second pressure sensor 13 independent from each other.
  • a refrigerant flow rate estimation means indicated by symbol 15 estimates a flow rate of refrigerant with reference to the pressure difference calculated (detected) by pressure difference calculation means 14 (pressure difference detection means).
  • pressure difference calculation means 14 pressure difference detection means.
  • the torque of compressor 2 is estimated by a compressor torque estimation means 16 with reference to the refrigerant flow rate estimated by the above-described refrigerant flow rate estimation means 15 .
  • this estimation of the torque of compressor 2 for example, it is possible to estimate the compressor torque with reference to the refrigerant flow rate estimated by refrigerant flow rate estimation means 15 , a physical amount having a correlation with the suction pressure of compressor 2 (for example, a physical amount detected by a suction pressure sensor), a physical amount having a correlation with the rotational speed of compressor 2 , and an amount detected by the above-described first pressure sensor 12 .
  • the operation of the refrigeration cycle according to the present invention can be represented by a P-h diagram, for example, as shown in FIGS. 2 (A) and (B).
  • orifice 9 provided in subcool condenser 3 , a pressure difference between the upstream and downstream positions of the orifice is forcibly given, and the flow rate of refrigerant having a high correlation with the pressure difference, and ultimately, the compressor torque, are estimated.
  • the stable and accurate detection of the pressure difference between the upstream and downstream positions of the orifice may contribute to an accurate estimation of refrigerant flow rate and an accurate estimation of compressor torque.
  • the refrigeration cycle according to the present invention can be applied to any refrigeration cycle requiring to estimate a compressor torque accurately, and in particular, it is suitable for use in an air conditioning system for vehicles which requires space saving and cost down.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Measuring Volume Flow (AREA)
US13/388,037 2009-07-30 2010-07-20 Refrigeration Cycle Abandoned US20120125041A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009177992A JP2011031678A (ja) 2009-07-30 2009-07-30 冷凍サイクル
JP2009-177992 2009-07-30
PCT/JP2010/062188 WO2011013540A1 (ja) 2009-07-30 2010-07-20 冷凍サイクル

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US20120125041A1 true US20120125041A1 (en) 2012-05-24

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US13/388,037 Abandoned US20120125041A1 (en) 2009-07-30 2010-07-20 Refrigeration Cycle

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US (1) US20120125041A1 (ja)
EP (1) EP2460676A4 (ja)
JP (1) JP2011031678A (ja)
CN (1) CN102470728A (ja)
WO (1) WO2011013540A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140180607A1 (en) * 2012-12-21 2014-06-26 Delphi Technologies, Inc. Method of torque prediction for automotive air conditioning compressor
US20170307266A1 (en) * 2014-11-14 2017-10-26 Carrier Corporation Economized cycle with thermal energy storage
WO2023136694A1 (ko) * 2022-01-17 2023-07-20 두원중공업(주) 용량 가변형 사판식 압축기

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5859299B2 (ja) * 2011-12-15 2016-02-10 株式会社ヴァレオジャパン 圧縮機の駆動トルク推定装置及びこれに用いる凝縮器
CN105627470B (zh) * 2015-12-30 2018-07-03 同济大学 一种基于过冷再热的空调机组
CN110953779B (zh) * 2019-12-20 2021-06-22 潍柴动力股份有限公司 朗肯循环系统的储液罐压力的控制方法和装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005016352A (ja) * 2003-06-24 2005-01-20 Sanden Corp 圧縮機出力算出装置およびそれを用いた制御装置
US20080104984A1 (en) * 2006-10-27 2008-05-08 Akinobu Kanai Structure for sensing refrigerant flow rate in a compressor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0650615A (ja) * 1992-07-30 1994-02-25 Nippondenso Co Ltd 冷凍サイクル
US6250103B1 (en) * 1999-04-07 2001-06-26 Showa Denko K.K. Condenser and air conditioning refrigeration system and using same
FR2807149B1 (fr) * 2000-03-31 2003-09-26 Valeo Thermique Moteur Sa Condenseur comprenant un reservoir communiquant avec une boite collectrice par une conduite comportant une restriction
JP4119143B2 (ja) * 2002-03-22 2008-07-16 カルソニックカンセイ株式会社 可変容量コンプレッサの駆動トルク算出装置
JP2009063179A (ja) * 2007-09-04 2009-03-26 Sanden Corp 圧縮機の駆動トルク演算装置及び可変容量圧縮機の容量制御システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005016352A (ja) * 2003-06-24 2005-01-20 Sanden Corp 圧縮機出力算出装置およびそれを用いた制御装置
US20080104984A1 (en) * 2006-10-27 2008-05-08 Akinobu Kanai Structure for sensing refrigerant flow rate in a compressor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140180607A1 (en) * 2012-12-21 2014-06-26 Delphi Technologies, Inc. Method of torque prediction for automotive air conditioning compressor
US9987905B2 (en) * 2012-12-21 2018-06-05 Mahle International Gmbh Method of torque prediction for automotive air conditioning compressor
US20170307266A1 (en) * 2014-11-14 2017-10-26 Carrier Corporation Economized cycle with thermal energy storage
US10281180B2 (en) * 2014-11-14 2019-05-07 Carrier Corporation Economized cycle with thermal energy storage
WO2023136694A1 (ko) * 2022-01-17 2023-07-20 두원중공업(주) 용량 가변형 사판식 압축기

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JP2011031678A (ja) 2011-02-17
CN102470728A (zh) 2012-05-23
WO2011013540A1 (ja) 2011-02-03
EP2460676A4 (en) 2013-04-03
EP2460676A1 (en) 2012-06-06

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Owner name: SANDEN CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ISHIZEKI, TETSUYA;INOUE, ATSUO;TSUBOI, MASATO;AND OTHERS;REEL/FRAME:027641/0334

Effective date: 20120112

STCB Information on status: application discontinuation

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