WO2005088212A1 - A cooling device and control method - Google Patents

A cooling device and control method Download PDF

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Publication number
WO2005088212A1
WO2005088212A1 PCT/IB2005/050721 IB2005050721W WO2005088212A1 WO 2005088212 A1 WO2005088212 A1 WO 2005088212A1 IB 2005050721 W IB2005050721 W IB 2005050721W WO 2005088212 A1 WO2005088212 A1 WO 2005088212A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
solenoid valve
refrigerant
stop state
pass line
Prior art date
Application number
PCT/IB2005/050721
Other languages
French (fr)
Inventor
Yalcin Guldali
Serdar Kocaturk
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to DE602005020264T priority Critical patent/DE602005020264D1/en
Priority to EP05708866A priority patent/EP1738119B1/en
Priority to AT05708866T priority patent/ATE462942T1/en
Publication of WO2005088212A1 publication Critical patent/WO2005088212A1/en

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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
    • 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
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • 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
    • F25B2400/0409—Refrigeration circuit bypassing means for the evaporator
    • 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
    • F25B2500/26—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
    • F25B2600/02—Compressor control
    • F25B2600/026—Compressor control by controlling unloaders
    • F25B2600/0261—Compressor control by controlling unloaders external to 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2503—Condenser exit 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
    • F25B2600/2507—Flow-diverting valves

Definitions

  • This invention relates to a cooling device and control method that includes a cooling circuit which prevents the migration of refrigerant.
  • the aim of this invention is to realize a cooling device and its control method that prevents migration of refrigerant that occurs in the stop state of a compressor and that enhances the compressor start-up at the beginning of operation period that is right after the stop state period.
  • Fig 1 is a perspective representation of a cooling device
  • Fig 2 is a schematic representation of a cooling circuit
  • FIG. 1 is a schematic representation of a cooling circuit at an alternative application of the invention.
  • Cooling circuit (9) that achieves the cooling cycle and that is utilized for cooling devices (1) such as refrigerators and air conditioners include a compressor (2); an evaporator (3) that sucks the thermal energy in the environment that is cooled; a condenser (4) that transfers the thermal energy to the outer environment; a capillary tube (5) that expands the refrigerant that leaves the condenser (4) and transfers the refrigerant to the evaporator (3); a preferably two way solenoid valve (6) that prevents migration of refrigerant by blocking the flow in the stop state of compressor (2) and that rests between the condenser (4) and the capillary tube (5); a solenoid valve that prevents reverse flow to the evaporator (3) during the stop state of compressor (2) and that is situated in the compressor (2) suction part; a by-pass line (7) that is located between the solenoid valve (6) and suction part of the compressor (2), that provides the refrigerant blocked during the stop state of the compressor (2) to flow towards the
  • the solenoid valve (6) allows the cooling cycle to sustain by directing the flow towards the capillary tube during the operation period and diverts the flow towards the by-pass line (7) by blocking the flow that runs towards the capillary tube (5) during the compressor (2) stop state.
  • solenoid valve (6) When the compressor (2) is in operation mode, in order to sustain cooling cycle, capillary tube outlet of solenoid valve (6) opens up and by-pass line (7) outlet is blocked. If the solenoid valve (16) opens synchronously as the compressor (2) operates right at the operation period, pressure at the compressor (2) suction part decreases partially until a limit torque value which would achieve the compression function after the initial startup, is reached and during the stop state although the pressure is brought to equilibrium, a pressure difference occurs between the two parts of the compressor (2); this pressure difference generates a high current during the initial start-up of the compressor (2).
  • the cooling circuit (9) includes a solenoid valve (6) that prevents migration of refrigerant by blocking the flow in the stop state of the compressor (2) and that is situated between the condenser (4) and capillary tube (5); a solenoid valve (16) that prevents reverse flow to the evaporator (3) in the compressor (2) stop state and that is installed at the suction part of the compressor (2); a by-pass line (17) that equilibrates the pressure when solenoid valve (6) is blocked in order to prevent migration of refrigerant and that is equipped between the suction and pumping parts of the compressor (2); a solenoid valve (116) that is designed on the bypass line (17); and a control mechanism (8) that controls the operation of solenoid valves (6, 16, 116) and compressor (2) ( Figure 3).
  • a solenoid valve (6) that prevents migration of refrigerant by blocking the flow in the stop state of the compressor (2) and that is situated between the condenser (4) and capillary tube (5)
  • solenoid valve (116) located on the by-pass line (17) opens up and allows for a flow in the direction that is opposite to the pumping direction; thus, pressure is equilibrated.
  • Solenoid valve (16) located at the suction part of the compressor (2) prevents reverse flow to the evaporator (3) by closing.
  • Opening of solenoid valve (16) can be delayed by the control unit (8) for a period that is from the initial start-up of the compressor (2) until the attainment of limit torque rate. Therefore, equilibrated pressure rates reserved during the stop state of the compressor (2) are preserved by the by-pass line (17) until the attainment of limit torque rate and compressor (2) realizes its pressing function and compressor's (2) drawing of high current rates is prevented.
  • Cooling device (1) and the control method being the subject of invention migration of refrigerant that occurs during the stop state of the compressor (2) from the condenser (4) towards the evaporator (3) and that causes yield loss, is prevented; provided that the migration of refrigerant is prevented, pressure between the suction and pumping parts of the compressor (2) are equilibrated, easier start-up of the compressor (2) is achieved and during the initial start-up until the attainment of limit torque rate, drawing of high current rates by the compressor (2) is prevented.

Abstract

This invention is related to a cooling device (1) and its control method that prevents the migration of refrigerant occurring in the cooling circuit (9) utilized for devices such as refrigerators and air conditioners, and during the stop state period of the compressor (2), from the condenser (4) towards the evaporator (3) causing a yield loss, at the same time by equilibrating the pressure between the suction and pumping parts of the compressor (2), simplifies the start-up of the compressor (2) and prevents the drawing of high current rates by the compressor (2) during the initial start-up until the limit torque rate.

Description

Description A COOLING DEVICE AND CONTROL METHOD
[001] This invention relates to a cooling device and control method that includes a cooling circuit which prevents the migration of refrigerant.
[002] In cooling devices such as refrigerators and air conditioners, during the stop state of a compressor, refrigerant that is under high pressure inside the condenser moves towards the evaporator that has lower pressure; the refrigerant that reaches the evaporator and has a higher temperature rate generates additional cooling load. This process having generated a yield loss is termed as the migration of refrigerant. For this reason, for cooling systems, during the stop state of compressor, the path of refrigerant that moves towards the evaporator from the condenser is blocked; thus, migration of refrigerant is prevented; however, unless no other precaution is taken, until the pressure between the condenser and evaporator is brought to equilibrium, due to the high pressure difference between compressor suction and pumping parts, compressor start-up problem occurs at the beginning of operating period that is after the compressor stop state. In order to tackle the compressor start-up problem, although during start-up the equilibrium pressure environment is achieved with applications such as by-pass lines installed between the suction and pumping parts of the compressor, high current is drawn until a limit torque rate in the compressor during the initial seconds of the operating period, is attained.
[003] In the United States patents US5088303 and US3722228 and European patent EP0060315, migration of refrigerant is prevented mechanically through the use of valves.
[004] In the United States patents US4735054 and US4790142, migration of refrigerant is prevented by using an automatically controlled blocking valve in a two way operating heat pump, by initiating a reverse flow valve at the beginning of operating period, pressure between suction and pumping parts is brought to equilibrium and compressor start-up is facilitated.
[005]
[006] In the United States Patent US5309728, migration of refrigerant is prevented in an air conditioner including multi evaporators and within a short period after equipment at the inner circuit is stopped, stop state of compressor is prolonged or the compressor is reverse operated and pressure is set to equilibrium by means of a by-pass line between the condenser and emission lines.
[007] In the European Patent Application EP0692687, a solenoid valve is utilized at the inlet of capillary tube; thus, preventing the migration of refrigerant and a control mechanism that establishes the timing between the opening of the solenoid valve and operation of compressor is utilized.
[008] The aim of this invention is to realize a cooling device and its control method that prevents migration of refrigerant that occurs in the stop state of a compressor and that enhances the compressor start-up at the beginning of operation period that is right after the stop state period.
[009] The cooling device and its control method relized in order to attain above mentioned aim of the invention is illustrated in the attached figures, where:
[010] Fig 1 is a perspective representation of a cooling device,
[011] Fig 2 is a schematic representation of a cooling circuit,
[012] Fig 3 is a schematic representation of a cooling circuit at an alternative application of the invention.
[013] The elements illustrated in the figures are numbered individually as follows.
[014] 1. Cooling device
[015] 2. Compressor
[016] 3. Evaporator
[017] 4. Condenser
[018] 5. Capillary tube
[019] 6, 16, 116 - Solenoid valve
[020] 7, 17 - By-pass line
[021] 8. Control mechanism
[022] 9. Cooling circuit
[023] Cooling circuit (9) that achieves the cooling cycle and that is utilized for cooling devices (1) such as refrigerators and air conditioners include a compressor (2); an evaporator (3) that sucks the thermal energy in the environment that is cooled; a condenser (4) that transfers the thermal energy to the outer environment; a capillary tube (5) that expands the refrigerant that leaves the condenser (4) and transfers the refrigerant to the evaporator (3); a preferably two way solenoid valve (6) that prevents migration of refrigerant by blocking the flow in the stop state of compressor (2) and that rests between the condenser (4) and the capillary tube (5); a solenoid valve that prevents reverse flow to the evaporator (3) during the stop state of compressor (2) and that is situated in the compressor (2) suction part; a by-pass line (7) that is located between the solenoid valve (6) and suction part of the compressor (2), that provides the refrigerant blocked during the stop state of the compressor (2) to flow towards the suction part of the compressor (2); thus, setting the equilibrium of the pressure in the suction and pumping parts of the compressor (2); a control mechanism (8) that controls the operation of solenoid valves (6, 16) and the compressor (2) (Figure 2).
[024] The solenoid valve (6) allows the cooling cycle to sustain by directing the flow towards the capillary tube during the operation period and diverts the flow towards the by-pass line (7) by blocking the flow that runs towards the capillary tube (5) during the compressor (2) stop state.
[025] For the control method of the cooling device (1) that is subject to the invention, in the stop state of the compressor (2), migration of refrigerant occurring towards the evaporator (3) from the condenser (4) is prevented by closing the outlet of capillary tube (5) of solenoid valve (6). At the same time, outlet of by-pass line (7) of the solenoid valve (6) opens up and by diverting the flow towards the suction part of the compressor (2), pressure between the suction and pumping parts of the compressor (2) is brought into equilibrium. Solenoid valve (16) that is situated at the suction part of the compressor (2) closes up and reverse flow to the evaporator (3) is prevented. When the compressor (2) is in operation mode, in order to sustain cooling cycle, capillary tube outlet of solenoid valve (6) opens up and by-pass line (7) outlet is blocked. If the solenoid valve (16) opens synchronously as the compressor (2) operates right at the operation period, pressure at the compressor (2) suction part decreases partially until a limit torque value which would achieve the compression function after the initial startup, is reached and during the stop state although the pressure is brought to equilibrium, a pressure difference occurs between the two parts of the compressor (2); this pressure difference generates a high current during the initial start-up of the compressor (2). For the application being the subject of invention, when the compressor (2) switches from the operation period from the stop state, opening of solenoid valve (16) is delayed for a period that is the period between the initial start-up of the compressor (2) until the attainment of limit torque rate. Therefore; equilibrated pressure rates reserved in the compressor (2) stop state are sustained when the limit torque rate is achieved and by the moment that the compressor (2) pressing function is initiated by means of a by-pass line (7) and high current rates drawn by a compressor (2) during initial start-up is prevented.
[026] At another application of the invention, the cooling circuit (9) includes a solenoid valve (6) that prevents migration of refrigerant by blocking the flow in the stop state of the compressor (2) and that is situated between the condenser (4) and capillary tube (5); a solenoid valve (16) that prevents reverse flow to the evaporator (3) in the compressor (2) stop state and that is installed at the suction part of the compressor (2); a by-pass line (17) that equilibrates the pressure when solenoid valve (6) is blocked in order to prevent migration of refrigerant and that is equipped between the suction and pumping parts of the compressor (2); a solenoid valve (116) that is designed on the bypass line (17); and a control mechanism (8) that controls the operation of solenoid valves (6, 16, 116) and compressor (2) (Figure 3).
[027] At the mentioned application of the invention, in the compressor (2) stop state, as soon as the solenoid valve (6) that is located between the condenser (4) and capillary tube (5) is blocked, solenoid valve (116) located on the by-pass line (17) opens up and allows for a flow in the direction that is opposite to the pumping direction; thus, pressure is equilibrated. Solenoid valve (16) located at the suction part of the compressor (2) prevents reverse flow to the evaporator (3) by closing. When compressor (2) switches to operation mode, in order to sustain cooling cycle, solenoid valve (6) that is between the capillary tube (5) and condenser (4) opens up and solenoid valve (116) located on the by-pass (17) line closes. Opening of solenoid valve (16) can be delayed by the control unit (8) for a period that is from the initial start-up of the compressor (2) until the attainment of limit torque rate. Therefore, equilibrated pressure rates reserved during the stop state of the compressor (2) are preserved by the by-pass line (17) until the attainment of limit torque rate and compressor (2) realizes its pressing function and compressor's (2) drawing of high current rates is prevented. Cooling device (1) and the control method being the subject of invention, migration of refrigerant that occurs during the stop state of the compressor (2) from the condenser (4) towards the evaporator (3) and that causes yield loss, is prevented; provided that the migration of refrigerant is prevented, pressure between the suction and pumping parts of the compressor (2) are equilibrated, easier start-up of the compressor (2) is achieved and during the initial start-up until the attainment of limit torque rate, drawing of high current rates by the compressor (2) is prevented.

Claims

Claims
[001] A cooling device (1) comprising; a cooling circuit (9) with; i. a compressor (2) that realizes the cooling cycle; ii. an evaporator (3) that sucks the thermal energy in the environment that is cooled; iii. a condenser (4) that transfers the thermal energy to the outer environment; iv. a capillary tube (5) that expands the refrigerant that leaves the condenser (4) and transfers the refrigerant to the evaporator (3); v. a solenoid valve (6) that controls the flow of the refrigerant and that rests between the condenser (4) and the capillary tube (5); vi. a by-pass line (7, 17) that equilibrates pressure at the suction and pumping parts of the compressor (2) and characterized by; a cooling circuit (9) comprising; i. a solenoid valve (16) that prevents the reverse flow to the evaporator (3) during the stop state of the compressor (2) and that is located at the suction part of the compressor (2); ii. a control mechanism (8) that extends the opening of solenoid valve (6) when the compressor (2) switches from the stop state to the operation period which is the time spent between the initial start-up of the compressor (2) and the attainment of the limit torque rate.
[002] A cooling device (1) as described in Claim 1, characterized by; a cooling circuit (9) comprising; i. a by-pass line (7) that is located between the solenoid valve (6) and suction part of the compressor (2) and that provides the refrigerant blocked during the stop state of the compressor (2) to flow towards the suction part of the compressor (2); thus, setting the equilibrium of the pressure in the suction and pumping parts of the compressor (2).
[003] A cooling device (1) as described in Claim 1, characterized by; a cooling circuit (9) comprising; i. a by-pass line (17) that equilibrates the pressure when solenoid valve (6) is blocked in order to prevent migration of refrigerant and that is equipped between the suction and pumping parts of the compressor (2); ii. a solenoid valve (116) that is designed on the by-pass line (17);
[004] A control method of a cooling device (1) as described in Claim 2 and comprising the following steps; when the compressor (2) is in stop state, closing the outlet of capillary tube of solenoid valve (6); at the same time, opening the outlet of by-pass line (7) of the solenoid valve (6); closing the solenoid valve (16) that is situated at the suction part of the compressor (2) and preventing the reverse flow to the evaporator (3); when the compressor switches to the operation mode, opening the outlet of capillary tube of solenoid valve (6); closing the outlet of by-pass line (7) of the solenoid valve (6); delayed opening of the solenoid valve (16) for a period that is between the initial start-up of the compressor (2) and the attainment of limit torque rate. A control method of a cooling device (1) as described in Claim 3 and comprising the following steps; when the compressor (2) is in stop state, closing the solenoid valve (6); opening the solenoid valve (116) that is located between the suction and pumping parts of the compressor (2); by closing the solenoid valve (16) that is located on the suction part of the compressor (2), preventing the reverse flow to the evaporator (3); when the compressor (2) switches to the operation mode, opening the solenoid valve (6); closing the solenoid valve (116) that is located on the by-pass line (17); delayed opening of the solenoid valve (16) for a period that is between the initial start-up of the compressor (2) and the attainment of limit torque rate.
PCT/IB2005/050721 2004-03-01 2005-02-28 A cooling device and control method WO2005088212A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602005020264T DE602005020264D1 (en) 2004-03-01 2005-02-28 COOLING DEVICE AND CONTROL PROCEDURE
EP05708866A EP1738119B1 (en) 2004-03-01 2005-02-28 A cooling device and control method
AT05708866T ATE462942T1 (en) 2004-03-01 2005-02-28 COOLING DEVICE AND CONTROL METHOD

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2004/00382 2004-03-01
TR200400382 2004-03-01

Publications (1)

Publication Number Publication Date
WO2005088212A1 true WO2005088212A1 (en) 2005-09-22

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PCT/IB2005/050721 WO2005088212A1 (en) 2004-03-01 2005-02-28 A cooling device and control method

Country Status (6)

Country Link
EP (1) EP1738119B1 (en)
AT (1) ATE462942T1 (en)
DE (1) DE602005020264D1 (en)
RU (1) RU2347985C2 (en)
TR (1) TR200604629T1 (en)
WO (1) WO2005088212A1 (en)

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US20070235161A1 (en) * 2006-03-27 2007-10-11 Eric Barger Refrigerant based heat exchange system with compensating heat pipe technology
WO2010010414A1 (en) * 2008-07-23 2010-01-28 Carrier Corporation Methods and systems for compressor operation
US20100043468A1 (en) * 2005-06-06 2010-02-25 Alexander Lifson Pulse width modulation with discharge to suction bypass
EP2357431A1 (en) * 2010-02-01 2011-08-17 Javier Cano Cavanillas Variable capacity refrigeration system
WO2013050055A1 (en) * 2011-10-03 2013-04-11 Electrolux Home Products Corporation N.V. Refrigerator and method of operating refrigeration system
DE102012005878A1 (en) * 2012-02-29 2013-08-29 Liebherr-Hausgeräte Lienz Gmbh Cooling and/or freezing apparatus, has control or regulating unit connected with shut-off element and controlling such that shut-off element is opened in standing time of compressor, where shut-off element is arranged in bypass pipe
EP2896855A4 (en) * 2012-09-16 2016-07-20 Hefei Meiling Co Ltd Electric valve and refrigeration system comprising same
US10309700B2 (en) 2016-02-26 2019-06-04 Lg Electronics Inc. High pressure compressor and refrigerating machine having a high pressure compressor
US10731647B2 (en) 2016-02-26 2020-08-04 Lg Electronics Inc. High pressure compressor and refrigerating machine having a high pressure compressor

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EP2662647A3 (en) * 2012-05-11 2017-07-12 Liebherr-Hausgeräte Ochsenhausen GmbH Refrigeration and/or freezer device
EP3211351A1 (en) * 2016-02-26 2017-08-30 Lg Electronics Inc. High pressure compressor and refrigerating machine having the same

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100043468A1 (en) * 2005-06-06 2010-02-25 Alexander Lifson Pulse width modulation with discharge to suction bypass
US10006681B2 (en) * 2005-06-06 2018-06-26 Carrier Corporation Pulse width modulation with discharge to suction bypass
US20070235161A1 (en) * 2006-03-27 2007-10-11 Eric Barger Refrigerant based heat exchange system with compensating heat pipe technology
WO2010010414A1 (en) * 2008-07-23 2010-01-28 Carrier Corporation Methods and systems for compressor operation
EP2357431A1 (en) * 2010-02-01 2011-08-17 Javier Cano Cavanillas Variable capacity refrigeration system
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TR200604629T1 (en) 2007-01-22
EP1738119B1 (en) 2010-03-31
DE602005020264D1 (en) 2010-05-12
EP1738119A1 (en) 2007-01-03
RU2347985C2 (en) 2009-02-27
ATE462942T1 (en) 2010-04-15
RU2006134640A (en) 2008-04-10

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