EP1966549A1 - Dispositif de refroidissement - Google Patents

Dispositif de refroidissement

Info

Publication number
EP1966549A1
EP1966549A1 EP06841405A EP06841405A EP1966549A1 EP 1966549 A1 EP1966549 A1 EP 1966549A1 EP 06841405 A EP06841405 A EP 06841405A EP 06841405 A EP06841405 A EP 06841405A EP 1966549 A1 EP1966549 A1 EP 1966549A1
Authority
EP
European Patent Office
Prior art keywords
evaporator
refrigerant
valve
compressor
expansion element
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.)
Granted
Application number
EP06841405A
Other languages
German (de)
English (en)
Other versions
EP1966549B1 (fr
Inventor
Serdar Kocaturk
Sabahattin Hocaoglu
Yalcin Guldali
Burak Asureciler
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 AS filed Critical Arcelik AS
Publication of EP1966549A1 publication Critical patent/EP1966549A1/fr
Application granted granted Critical
Publication of EP1966549B1 publication Critical patent/EP1966549B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/27—Problems to be solved characterised by the stop 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
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • 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
    • F25B2600/23—Time delays
    • 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
    • F25B2600/2511—Evaporator distribution valves

Definitions

  • the present invention relates to a cooling device wherein the refrigerant migration is directed.
  • refrigerant passage occurs from the condenser to the evaporator until the suction line and the discharge line pressures are balanced.
  • This condition called refrigerant migration, results in the overheating of the ambient temperature regionally in the cabin inner portions corresponding to the first evaporator passages wherein particularly the evaporator inlet is situated.
  • the temperature in this region and hence the thermal load of the cooling cabin increases due to the refrigerant migration effect.
  • This condition brings an additional thermal load inside the cooling cabin and also prevents a homogeneous distribution of temperature in the cooled cabin and results in the increase of energy consumption with the compressor operating for a longer time.
  • the evaporator stays dry since it is not filled up with the refrigerant.
  • a certain time period passes for the refrigerant to fill up the evaporator and fill to the evaporation temperature along the entire evaporator.
  • This process called the redistribution of charge in the evaporator (the evaporator filling up with the refrigerant), results in the decrease of the evaporator efficiency and lowering of its cooling capacity during this time period.
  • Even if prevention of the refrigerant migration provides a reduction in energy consumption to a certain extent, the evaporator refilling up with the refrigerant takes a longer time since the evaporator stays entirely dry during the off period.
  • the object of the present invention is the realization of a cooling device wherein the evaporator is provided to be refilled with the refrigerant at the start of the next compressor on period while the refrigerant migration effect is reduced.
  • the cooling device realized in order to fulfill the objectives of the present invention, explicated in the first claim and the dependent claims thereof, comprises preferably a bi-solenoid valve, situated between the condenser and the expansion element, that prevents refrigerant flow from the condenser to the evaporator by means of the capillary tube that is used as an expansion element during the off -period of the compressor by staying closed and another expansion element, one end of which is connected to this valve and the other end to the evaporator passages between the evaporator inlet and outlet, preferably to a passage near the last passage and a valve between the point wherein this expansion element is connected to the evaporator and the first passages of the evaporator.
  • a bi-solenoid valve situated between the condenser and the expansion element, that prevents refrigerant flow from the condenser to the evaporator by means of the capillary tube that is used as an expansion element during the off -period of the compressor by staying closed and another expansion element
  • the valve situated between the evaporator passages stays open during the on-period of the compressor providing the refrigerant to flow along the evaporator, and is kept in the closed position during the off period of the compressor, preventing the refrigerant that reaches the evaporator by means of the additional expansion element due to refrigerant migration from reaching the first passages of the evaporator and provides the refrigerant to be directed only to the last passages of the evaporator.
  • the refrigerant flowing due to the refrigerant migration effect by means of the capillary tube from the condenser to the evaporator during the off period of the compressor is directed to the last passages of the evaporator with the additional expansion element and the heating effect resulting from the refrigerant migration is decreased.
  • the directing of the refrigerant migration instead of completely preventing it also assists in enhancing the redistribution process of the refrigerant at the same time.
  • valve between the evaporator passages is opened by the control unit before the compressor starts its on period and the refrigerant is provided to be distributed in the entire evaporator before the compressor starts its on period. Accordingly pressure is balanced in all of the evaporator passages by opening the valve a short while before the compressor on period starts.
  • the valve is switched to the open position by the control unit, delaying to change the position of the other valve at the start of the compressor on period and the refrigerant is delivered to the evaporator over the additional expansion element for a certain time period. Accordingly, the process of the refrigerant refilling the evaporator is enhanced by continuing the refrigerant flow over the additional expansion element for a certain time period
  • Rgure 1 - is the general view of the cooling device.
  • Rgure 2 - is the schematic view of an embodiment of the cooling system of the cooling device of the present invention.
  • the cooling device (1) of the present invention comprises a compressor (2) that provides compression of the refrigerant, a condenser (3) providing the refrigerant leaving the compressor (2) as overheated vapor to be condensed to change first to the lquid- vapor phase and then to the lquid phase completely, one or more evaporators (5) providing to cool the ambient environment by the refrigerant circulating within absorbing heat, an expansion element (4) providing the refrigerant leaving the condenser (3) to expand and to be delivered to the evaporator (5), preferably a bistable solenoid valve (6) situated between the condenser (3) and the expansion element (4) that shuts off the refrigerant flow from the condenser (3) to the evaporator (5) during the off period of the compressor (2) (Rgure 1).
  • the cooling device (1) comprises an additional expansion element (7) with one end extending to the valve (6) and the other end into between the evaporator (5) passages, providing to direct the refrigerant migration to a portion of the evaporator (5), a second valve (16) separating the evaporator (5) into two by being situated between the evaporator (5) inlet and the point wherein the additional expansion element (7) is connected to the evaporator (5), and a control unit (8) that provides the refrigerant to reach from the condenser (3) to the evaporator (5) and to the compressor (2) by means of the first valve (6) and by way of the expansion element (4) thus completing the cooling cycle by opening the second valve (16) while the compressor (2) operates and when the compressor (2) stops, closing the second valve (16) providing the refrigerant that tends to flow from the condenser (3) to the evaporator (5) by the first valve (6) due to the refrigerant migration effect, to be directed over the additional expansion element (7) to the passages
  • the additional expansion element (7) is selected to be with a lesser resistance than the expansion element (4), that is of a greater diameter, with a shorter length in order to cause a smaller pressure decrease of the refrigerant.
  • the valve (6) is a bi-stable solenoid valve with one inlet port- two outlet ports, the inlet port extending to the condenser (3), one of the outlet ports extending to the expansion element (6), and the other to the additional expansion element (7).
  • the control unit (8) regulates the valves (6,16) with a control method in the following way: During the on period of the compressor (2), the port of the valve (6) between the expansion element (4) and the condenser (3) extending to the expansion element (4) is open, the port extending to the additional expansion element (7) is closed and the refrigerant is allowed to reach the expansion element (4) but not to the additional expansion element (7). In this case the second valve (16) is in the open position. The refrigerant reaching the condenser (3) by flowing from the discharge line, passes from the condenser (3) to the evaporator (5) by way of the expansion element (4) and reaches the compressor (2) again from the suction line.
  • the valve (16) between the evaporator (5) passages is opened before the compressor (2) starts its on period, and the distribution of the refrigerant to the entire evaporator (5) is provided before the compressor (2) starts its on period.
  • the valve (16) is opened a short while before the on period starts, providing to balance the pressure between all of the evaporator (5) passages. With the start of the on period, the position of the valve (16) is changed and the refrigerant leaving the condenser (3) is directed to the expansion element (4).
  • valve (16) is changed to the open position by the control unit (8), delaying the change of position of the valve (6) at the start of the compressor (2) on period and the refrigerant is delivered to the evaporator (5) over the additional expansion element (7) for a certain time period.
  • the process of the evaporator (5) filling up with the refrigerant is enhanced by continuing the refrigerant flow over the additional expansion element (7) for a certain time period. Since the additional expansion element (7) with a lower resistance functions in the first moments of the compressor (2) on period, all of the evaporator (5) passages up to the evaporator (5) outlet can be wetted in a short while. After this time period the refrigerant flow is again directed over the expansion element
  • refrigerant migration is not prevented altogether; instead, it is directed to a portion of the evaporator (5).
  • a more homogeneous distribution of temperature within the cabin is provided by decreasing the heating effect of the refrigerant migration that occurs during the compressor (2) off period, enhancing the refilling up of the evaporator (5) with refrigerant at the start of the next on period.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Selon la présente invention, l'effet chauffant de la migration de réfrigérant qui se produit dans un système de refroidissement fonctionnant en tout-ou-rien est réduit, et le remplissage de l'évaporateur (5) en réfrigérant au début de la période suivante de fonctionnement du compresseur (2) est amélioré.
EP06841405.1A 2005-12-29 2006-12-18 Dispositif de refroidissement Not-in-force EP1966549B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200505318 2005-12-29
PCT/EP2006/069810 WO2007074094A1 (fr) 2005-12-29 2006-12-18 Dispositif de refroidissement

Publications (2)

Publication Number Publication Date
EP1966549A1 true EP1966549A1 (fr) 2008-09-10
EP1966549B1 EP1966549B1 (fr) 2017-07-19

Family

ID=37859363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06841405.1A Not-in-force EP1966549B1 (fr) 2005-12-29 2006-12-18 Dispositif de refroidissement

Country Status (4)

Country Link
EP (1) EP1966549B1 (fr)
KR (1) KR101011214B1 (fr)
CN (1) CN101351677B (fr)
WO (1) WO2007074094A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009000840A1 (de) 2009-02-13 2010-08-19 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit vergleichmäßiger Temperaturverteilung
AU2014407850B2 (en) * 2014-09-30 2018-03-08 Mitsubishi Electric Corporation Refrigeration cycle device
CN108819669B (zh) * 2018-07-10 2024-04-30 天津商业大学 一种防曝晒升温的车用制冷系统
DE102019216649A1 (de) * 2019-10-29 2021-04-29 BSH Hausgeräte GmbH Kältegerät mit mehreren Temperaturzonen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1192083B (it) * 1986-05-20 1988-03-31 Zanussi Elettrodomestici Circuito frigorifero con compressore rotativo
JPH04356677A (ja) * 1991-05-29 1992-12-10 Sharp Corp 蓄冷式冷蔵庫
DE19535144A1 (de) * 1995-09-21 1997-03-27 Bosch Siemens Hausgeraete Kältegerät
DE19756860A1 (de) * 1997-12-19 1999-06-24 Bosch Siemens Hausgeraete Kältegerät
JP2000111230A (ja) * 1998-10-02 2000-04-18 Toshiba Corp 冷凍冷蔵庫
JP2000146398A (ja) * 1998-11-09 2000-05-26 Toshiba Corp 冷蔵庫の制御装置
JP2000329443A (ja) * 1999-05-21 2000-11-30 Sharp Corp 冷蔵庫
US6883339B2 (en) * 2001-04-04 2005-04-26 Lg Electronics Inc. Method for controlling power saving operation of refrigerator with two evaporator
JP2003014357A (ja) * 2001-06-27 2003-01-15 Mitsubishi Electric Corp 冷蔵庫
JP2003065619A (ja) * 2001-08-23 2003-03-05 Toshiba Corp 冷蔵庫
KR20050038293A (ko) * 2003-10-21 2005-04-27 엘지전자 주식회사 냉장고의 밸브제어방법
KR100725790B1 (ko) * 2004-12-22 2007-06-08 삼성전자주식회사 냉장고 및 그 제조방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007074094A1 *

Also Published As

Publication number Publication date
CN101351677B (zh) 2011-09-14
CN101351677A (zh) 2009-01-21
WO2007074094A1 (fr) 2007-07-05
KR101011214B1 (ko) 2011-01-26
EP1966549B1 (fr) 2017-07-19
KR20080081909A (ko) 2008-09-10

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