EP2434236B1 - Kühlsystem - Google Patents

Kühlsystem Download PDF

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Publication number
EP2434236B1
EP2434236B1 EP11182541.0A EP11182541A EP2434236B1 EP 2434236 B1 EP2434236 B1 EP 2434236B1 EP 11182541 A EP11182541 A EP 11182541A EP 2434236 B1 EP2434236 B1 EP 2434236B1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
accumulator
super cooling
super
amount
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.)
Not-in-force
Application number
EP11182541.0A
Other languages
English (en)
French (fr)
Other versions
EP2434236A3 (de
EP2434236A2 (de
Inventor
Hojong Jeong
Baikyoung Chung
Jaehwa Jung
Yongcheol Sa
Byungsoon Kim
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP2434236A2 publication Critical patent/EP2434236A2/de
Publication of EP2434236A3 publication Critical patent/EP2434236A3/de
Application granted granted Critical
Publication of EP2434236B1 publication Critical patent/EP2434236B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • 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—Component parts or details not otherwise provided for in this subclass
    • F25B2400/13—Economisers
    • 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—Component parts or details not otherwise provided for in this subclass
    • F25B2400/16—Receivers
    • 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
    • F25B2600/19—Refrigerant outlet condenser temperature
    • 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
    • F25B2700/04—Refrigerant level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser

Definitions

  • the prevent invention relates to a refrigerant system to perform a refrigerant cycle.
  • the refrigerant system is a cooling or heating device for conditioning indoor air by performing a refrigerant cycle composed of compression- condensation-expansion-evaporation.
  • the refrigerant system includes the compressor 12, a condenser condensing the refrigerant passed through the compressor 12, an expanding units 141, 142 expanding the refrigerant passed through the condenser, an evaporator evaporating the refrigerant passed through the expanding units 141, 142, the main refrigerant pipe 151 forming the refrigerant cycle by connecting the compressor 12, the condenser, the expanding units 141, 142 and the evaporator, and the accumulator 16.
  • the outdoor heat exchanger 11 is installed on one side of the outdoor to be exposed on the outdoor air.
  • the indoor heat exchanger 13 is installed on one side of an indoor space to perform an indoor conditioning.
  • the indoor heat exchanger 13 may include a plurality of indoor heat exchangers 131, 132, 133 installed on a plurality of indoor spaces respectively.
  • the compressor 12 may include a constant displacement compressor 121 constantly maintaining a compression capacity and an inverter compressor 122 varying the compression capacity.
  • the expanding units 141, 142 may includes an outdoor expanding unit 141 mounted on one side of the main refrigerant pipe 151 adjacent to the outdoor heat exchanger 11 and an indoor expanding unit 142 mounted on one side of the main refrigerant pipe 151 adjacent to the indoor heat exchanger 13.
  • the outdoor expanding unit 141 and the indoor expanding unit 142 are mounted on the one side of the main refrigerant pipe 151 connecting the outdoor heat exchanger 11 and the indoor heat exchanger 13 each other.
  • the indoor expanding unit 142 may include a plurality of indoor expanding units 142 installed to correspond to each one side of the plurality of indoor heat exchangers 131, 132, 133.
  • the indoor expanding unit 142 may function that refrigerants introduced into a plurality of indoor heat exchanger units 131, 132, 133 are selectively blocked according to whether a plurality of indoor heat exchanger units 131, 132, 133 are operated..
  • the outdoor expanding unit 141 and the indoor expanding unit 142 include a valve, for example, an electronic expanding valve (EEV), capable of adjusting an open degree and the open degree may be adjusted according to the operation mode of the refrigerant system.
  • a valve for example, an electronic expanding valve (EEV), capable of adjusting an open degree and the open degree may be adjusted according to the operation mode of the refrigerant system.
  • EEV electronic expanding valve
  • the outdoor expanding unit 141 is completely opened, the indoor expanding unit 142 is partially opened, and accordingly the refrigerant passed through the outdoor heat exchanger 11 is passed through the outdoor expanding unit 141 without changing the state and expanded through the indoor expanding unit 142, and then the expanded refrigerant may be introduced into the indoor heat exchanger 13.
  • the refrigerant system may further include a refrigerant amount detection unit 18 which detects refrigerant amount stored in the accumulator 16.
  • the refrigerant amount detection unit 18 is installed in one side of the accumulator 16 to detect refrigerant amounts stored in the accumulator 16.
  • the refrigerant amount detection unit 18 may include a plurality of water level sensors 181, 182, installed in one side of the accumulator 16, with a plurality of different heights to detect various refrigerant water levels of the accumulator 16.
  • the super cooler may further include a bypass pipe 153 which bypasses a portion of refrigerants passed through the condenser to guide the portion into an inlet side of the accumulator 16, a super cooling heat exchanger 191 which performs the heat-exchange between the portion of the refrigerants bypassed and the refrigerant of the main refrigerant pipe 151, and a super cooling adjustment unit 192 which adjusts a portion of refrigerant amounts passed through the super cooling heat exchanger 191.
  • the refrigerant system includes the super cooling adjustment unit 192 and a control unit 105 which controls the super cooling adjustment unit 192 based on information detected from the refrigerant amount detection unit 18, the high pressure detection unit 101 and the super cooling detection unit 102.
  • the refrigerant amount detection unit 18, the high pressure detection unit 101, the super cooling detection unit 102, the super cooling adjustment unit 192 and the control unit 105 are electrically connected each other so as to receive or transmit the control signal.
  • a process that the refrigerant system is generally stabilized is performed (S11). For example, when the heating operation of the refrigerant system starts, since the flow state of refrigerant is changed, the time may be needed until the heating operation of the refrigerant system is stabilized. In this case, the stabilization process of the refrigerant system may be the elapsed time until the heating operation of the refrigerant system is stabilized
  • the high pressure and the refrigerant amount stored in the accumulator are detected. (S12).
  • the high pressure and the storage refrigerant amount may be detected by the high pressure detection unit 101 and the refrigerant amount detection unit 18.
  • the high reference pressure may mean a high pressure to achieve the indoor heating, that is, a proper high pressure value to cover the indoor conditioning load.
  • the reference high pressure may be a specific pressure value and may be a range of a proper pressure value to cover the indoor conditioning load.
  • the detected high pressure when the detected high pressure is below the reference high pressure, it may mean that the high pressure on the refrigerant cycle is insufficient to cover the indoor conditioning load. In contrast when the detected high pressure exceeded the reference high pressure, it may mean that the high pressure on the refrigerant cycle is sufficient to cover the indoor conditioning load and the rest is excessive.
  • the minimum storage amount may be previously set as a minimum limit value to be stored in accumulator 16.
  • the first sensor 181 may detect whether the storage refrigerant amount is higher or lower than the minimum storage amount.
  • the open degree of the super refrigerant adjustment unit 192 is controlled to increase (S18).
  • the maximum storage amount may be previously set as a maximum limit value to be stored in accumulator 16.
  • the second sensor 182 may detect whether the storage refrigerant amount is higher or lower than the minimum storage amount.
  • the detected high pressure is not below the reference high pressure (S13) and not exceeded the reference high pressure (S16), that is, the detected high pressure is corresponded to the reference high pressure, the current state is maintained.
  • the high pressure, the super cooling degree and the refrigerant amount stored in the accumulator 16 are detected (S22).
  • the high pressure and the storage refrigerant amount may be detected by the high pressure detection unit 101, the super cooling detection unit 102 and the refrigerant amount detection unit 18.
  • the super cooling degree detected by the super cooling degree detection unit 102 is degree below a reference super cooling degree (S23)
  • the high pressure (detected high pressure) detected by the high detection unit 101 is below a safe high pressure (S24)
  • the storage refrigerant amount detected by the refrigerant amount detection unit 18 exceeded the minimum storage amount (S25)
  • the open degree of the super cooling adjustment unit 192 is controlled to decrease (S26).
  • the reference super cooling degree may mean a super cooling degree to achieve the indoor cooling, that is, a proper super cooling degree value to cover the indoor conditioning load.
  • the reference super cooling degree may be a specific super cooling degree value and may be a range of a proper super cooling degree value to cover the indoor conditioning load.
  • comparing the high pressure and the super cooling degree with the reference high pressure and the reference super cooling degree may mean comparing the indoor conditioning load of the refrigerant system with the reference load.
  • the open degree of the super refrigerant adjustment unit 192 is controlled to increase (S29) .
  • the detected super cooling degree is not below the reference super cooling degree (S23) and not exceeded the reference super cooling degree (S27), that is, the detected super cooling degree is corresponded to the reference super cooling degree, the current state is maintained.
  • the stabilization process of the refrigerant system is again performed (S21).
  • the signal input for ending the cooling operation of the refrigerant system may be performed by inputting separate signal through the user or by the end conditions internally set.
  • the flow the refrigerant amount on the refrigerant cycle may be optimally adjusted according to the operation state of the refrigerant system.
  • the open degree of the super cooling adjustment unit 192 is decreased, and accordingly the refrigerant amount introduced in the accumulator 16 may be decreased.
  • refrigerant amounts stored in the accumulator 16 are introduced into the compressor 12 and may be supplemented into the main refrigerant pipe 151. That is, by increasing the flow refrigerant amount on the refrigerant cycle, the high pressure is increased and may be controlled to reach the reference high pressure.
  • the open degree of the super cooling adjustment unit 192 is increased, and accordingly the refrigerant amount introduced in the accumulator 16 may be increased. Accordingly, refrigerant amounts stored in the accumulator 16 of the main refrigerant pipe 151 are increased. That is, by decreasing the flow refrigerant amount on the refrigerant cycle, the high pressure is decreased and may be controlled to reach the reference high pressure.
  • the open degree of the super cooling adjustment unit 192 is decreased, and accordingly the refrigerant amount introduced in the accumulator 16 is decreased.
  • refrigerant stored in the accumulator 16 is introduced into the compressor 12 and may be supplemented into the main refrigerant pipe 151. That is, by increasing the flow refrigerant amount on the refrigerant cycle, the super cooling degree is increased and may be controlled to reach the reference super cooling degree.
  • refrigerant amounts stored in the accumulator 16 of refrigerants of the main refrigerant pipe 151 is increased. That is, by decreasing the flow refrigerant amount on the refrigerant cycle, the super cooling degree is decreased and may be controlled to reach the reference super cooling degree.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Claims (12)

  1. Kühlsystem, mit: einem Verdichter (12), der ein Kältemittel verdichtet; einem Kondensator (11,13), der das aus dem Verdichter ausgestoßene Kältemittel kondensiert; einer Expansionseinheit (141,142), die das durch den Kondensator gegangene Kältemittel expandiert, einem Verdampfer (13,11), der das durch die Expansionseinheit gegangene Kältemittel verdampft; einer Hauptkältemittelleitung (151), die durch Verbinden des Verdichters, des Kondensators, der Expansionseinheit und des Verdampfers einen Kältekreislauf bildet; einem Akkumulator (16), der ein flüssiges Kältemittel aus den Kältemitteln filtert, die in den Verdichter fließen; einer Unterkühlungseinrichtung (153,191), in die ein Anteil der Kältemittel verteilt wird, um das Kältemittel der Hauptkältemittelleitung zu unterkühlen, wobei die Unterkühlungseinrichtung konfiguriert ist, den Anteil in den Akkumulator einzuleiten; einer Unterkühlungseinstelleinheit (192), die einen Anteil der Kältemittelmenge einstellt, die durch die Unterkühlungseinrichtung geschickt wird; und einer Steuereinheit (105), die die Unterkühlungseinstelleinheit steuert, die im Akkumulator gespeicherte Kältemittelmenge gemäß einer Innenklimatisierungslast zu erhöhen oder zu senken,
    dadurch gekennzeichnet, dass das Kühlsystem ferner aufweist:
    eine Hochdruckdetektionseinheit (101), die einen Hochdruck des Kältemittels auf der Ausstoßseite des Verdichters detektiert; und
    eine Unterkühlungsgrad-Detektionseinheit (102), die einen Kältemittelunterkühlungsgrad einer Ausstoßseite des Kondensators detektiert,
    wobei die Steuereinheit die Unterkühlungseinstelleinheit steuert, die im Akkumulator gespeicherte Kältemittelmenge gemäß mindestens einem des Hochdrucks des Kältemittels und des Kältemittelunterkühlungsgrads einzustellen, wenn die Innenklimatisierungslast gesenkt wird.
  2. Kühlsystem nach Anspruch 1, wobei die Steuereinheit die Unterkühlungseinstelleinheit steuert, die im Akkumulator gespeicherte Kältemittelmenge zu senken, wenn die Innenklimatisierungslast erhöht wird, und
    die Steuereinheit die Unterkühlungseinstelleinheit steuert, die im Akkumulator gespeicherte Kältemittelmenge zu erhöhen, wenn die Innenklimatisierungslast gesenkt wird.
  3. Kühlsystem nach Anspruch 1, wobei die Steuereinheit die Unterkühlungseinstelleinheit steuert, die im Akkumulator gespeicherte Kältemittelmenge zu senken, wenn der Hochdruck des Kältemittels gleich oder höher als ein Bezugshochdruck ist, und die Steuereinheit die Unterkühlungseinstelleinheit steuert, die im Akkumulator gespeicherte Kältemittelmenge zu erhöhen, wenn der Hochdruck des Kältemittels niedriger als der Bezugshochdruck ist.
  4. Kühlsystem nach Anspruch 1, wobei
    die Steuereinheit die Unterkühlungseinstelleinheit steuert, den Kältemitteldurchsatz im Kältekreislauf zu senken, wenn der Kältemittelunterkühlungsgrad gleich oder höher als ein Bezugsunterkühlungsgrad ist, und
    die Steuereinheit die Unterkühlungseinstelleinheit steuert, den Kältemitteldurchsatz im Kältekreislauf zu erhöhen, wenn der Kältemittelunterkühlungsgrad niedriger als der Bezugsunterkühlungsgrad ist.
  5. Kühlsystem nach Anspruch 1, das ferner aufweist:
    eine Kältemittelmengen-Detektionseinheit (18), die die im Akkumulator gespeicherte Kältemittelmenge detektiert.
  6. Kühlsystem nach Anspruch 5, wobei die Kältemittelmengen-Detektionseinheit aufweist:
    eine erste Detektionseinheit (181), die detektiert, ob ein Kältemittelpegel des Akkumulators niedriger als ein erster Pegel ist, und
    eine zweite Detektionseinheit (182), die getrennt auf der Oberseite der ersten Detektionseinheit angeordnet ist, um zu detektieren, ob der Kältemittelpegel des Akkumulators gleich oder höher als ein zweiter Pegel ist.
  7. Kühlsystem nach Anspruch 6, wobei die Steuereinheit so steuert, dass ein Öffnungsgrad der Unterkühlungseinstelleinheit gesenkt wird, wenn der im Akkumulator gespeicherte Kältemittelpegel höher als der erste Pegel ist.
  8. Kühlsystem nach Anspruch 7, wobei der erste Pegel ein Pegel ist, der einer minimalen Speichermenge des zulässigen Kältemittels entspricht, das im Akkumulator gespeichert werden soll.
  9. Kühlsystem nach Anspruch 6, wobei die Steuereinheit so steuert, dass der Öffnungsgrad der Unterkühlungseinstelleinheit erhöht wird, wenn der im Akkumulator gespeicherte Kältemittelpegel niedriger als der zweite Pegel ist.
  10. Kühlsystem nach Anspruch 9, wobei der zweite Pegel ein Pegel ist, der einer maximalen Speichermenge des zulässigen Kältemittels entspricht, das im Akkumulator gespeichert werden soll.
  11. Kühlsystem nach Anspruch 1, wobei die Unterkühlungseinrichtung eine Umgehungsleitung (153), die den Anteil des Kältemittels umleitet, das durch den Kondensator geschickt wird, um den Anteil in eine Einlassseite des Akkumulators zu leiten, und einen Unterkühlungswärmetauscher (191) aufweist, der den Wärmetausch zwischen dem Anteil des umgeleiteten Kältemittels und dem Kältemittel der Hauptkältemittelleitung durchführt.
  12. Kühlsystem nach Anspruch 1, wobei die Steuereinheit so steuert, dass der Öffnungsgrad der Unterkühlungseinstellung während einer Umstellung des Kühlbetriebs auf einen Heizbetrieb geschlossen oder gesenkt wird.
EP11182541.0A 2010-09-27 2011-09-23 Kühlsystem Not-in-force EP2434236B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100093470A KR101201635B1 (ko) 2010-09-27 2010-09-27 공기 조화기

Publications (3)

Publication Number Publication Date
EP2434236A2 EP2434236A2 (de) 2012-03-28
EP2434236A3 EP2434236A3 (de) 2015-06-03
EP2434236B1 true EP2434236B1 (de) 2018-11-07

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EP11182541.0A Not-in-force EP2434236B1 (de) 2010-09-27 2011-09-23 Kühlsystem

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Country Link
US (1) US20120073313A1 (de)
EP (1) EP2434236B1 (de)
KR (1) KR101201635B1 (de)
CN (1) CN102418959A (de)

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CN106032949B (zh) * 2015-03-09 2020-01-10 大金工业株式会社 制冷装置
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KR20190000254A (ko) * 2017-06-22 2019-01-02 엘지전자 주식회사 공기 조화기

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Also Published As

Publication number Publication date
CN102418959A (zh) 2012-04-18
EP2434236A3 (de) 2015-06-03
US20120073313A1 (en) 2012-03-29
EP2434236A2 (de) 2012-03-28
KR101201635B1 (ko) 2012-11-20
KR20120031843A (ko) 2012-04-04

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