EP1087184B1 - Dispositif de conditionnement d'air - Google Patents

Dispositif de conditionnement d'air Download PDF

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Publication number
EP1087184B1
EP1087184B1 EP00307919A EP00307919A EP1087184B1 EP 1087184 B1 EP1087184 B1 EP 1087184B1 EP 00307919 A EP00307919 A EP 00307919A EP 00307919 A EP00307919 A EP 00307919A EP 1087184 B1 EP1087184 B1 EP 1087184B1
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EP
European Patent Office
Prior art keywords
compressor
detection means
air conditioner
microcomputer
temperature
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.)
Expired - Lifetime
Application number
EP00307919A
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German (de)
English (en)
Other versions
EP1087184A3 (fr
EP1087184A2 (fr
Inventor
Akihiro Kai
Masaya Itagaki
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.)
Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1087184A2 publication Critical patent/EP1087184A2/fr
Publication of EP1087184A3 publication Critical patent/EP1087184A3/fr
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Publication of EP1087184B1 publication Critical patent/EP1087184B1/fr
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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
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/15—Power, e.g. by voltage or current
    • F25B2700/151—Power, e.g. by voltage or current of the compressor motor
    • 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
    • F25B49/022—Compressor control arrangements

Definitions

  • the present invention relates to an air conditioner comprising the features of the preamble of claim 1.
  • Such an air conditioner is known, for instance, from JP-A-9-14805. It comprises a control system as show in the diagram of Figure 8.
  • a serial connection of a protection circuit 42, a relay contact 36, and a compressor magnet (an excitation coil in an electromagnetic contactor for a compressor) 38 is connected across two lines (i.e., R-S in Figure 8) among three-phase a.c. power source lines (R, S, T) for supplying power to an air conditioner.
  • the protection circuit 42 includes an internal thermo-switch (bimetal) 24 provided for a blower, an internal thermo-switch (bimetal) 26 provided for a compressor, and a high-pressure switch 28, which are connected in series.
  • a photo-coupler 44 (such as a triac photo-coupler) 44, as an optical coupling device for transmitting signals, is connected in parallel to the relay contact 36 and the compressor magnet 38.
  • An abnormality detection signal generated from the photo-coupler 44 is supplied to a microcomputer 46.
  • the microcomputer 46 opens or closes the relay contact 36.
  • Figure 9 is a refrigerant circulation circuit for the air conditioner shown in JP-A-9-14805.
  • reference numeral 40 designates a compressor, numeral 18 an indoor side heat exchanger (in this case, a condenser), numeral 23 an outdoor side heat exchanger (in this case, an evaporator), numeral 25 a blower motor, numeral 29 a motor-driven expansion valve, numeral 30 a bypass valve, numeral 31 a motor-driven expansion valve, and numeral 32 a four-way valve.
  • the high-pressure switch 28 and the thermo-switches 24 and 26 are those shown in Figure 8.
  • the protection circuit as described above is operated as follows.
  • the thermo-switch 24 When the temperature of the blower motor shows an abnormal state, the thermo-switch 24 is opened.
  • the thermo-switch 26 When the temperature of the compressor motor shows an abnormal state, the thermo-switch 26 is opened.
  • an abnormally high pressure condition is generated in the compressor, the high-pressure switch 28 is opened.
  • the protection circuit 42 becomes an open state. Accordingly, electric current fed to the compressor magnet 38 is stopped, whereby the compressor ceases.
  • the photo-coupler 44 becomes an off state in the following four cases:
  • the period of instantaneous interruption is generally from several milliseconds to several hundred milliseconds at the longest. Accordingly, the photo-coupler 44 restores within 1 second after the instantaneous interruption.
  • a differential time such as "OFF at 30 kg/cm 2 and ON at 28.5 kg/cm 2 " is generally determined for the high-pressure switch 28. Therefore, even in a case that pressure in the compressor exceeds 30 kg/cm 2 whereby the compressor is stopped by an opening action of the high-pressure switch 28, the high-pressure switch is not immediately restored to a closing state.
  • the high-pressure switch 28 becomes a closing state when pressure in the compressor is decreased to 28.5 kg/cm 2 by operating the electromagnetic valve 30 ( Figure 9) to bypass a refrigerant in the refrigeration circulation circuit between its high and low pressure sides. In this case, the time needed for the restoration is several seconds.
  • thermo-switch 24 or 26 installed in the blower or the compressor in the case (3) or (4), when it once becomes an off state, it takes at least several tens of minutes to restore. Accordingly, it was necessary for the microcomputer 46, based on an abnormality detection signal from the photo-coupler 44, to specify the thermo-switch by utilizing a difference of restoration time among the switches 24, 26, 28.
  • an air conditioner which comprises:
  • display means for displaying an operating condition of the compressor according to an instruction from the microcomputer.
  • high-pressure refrigerant temperature detection means for detecting a temperature of the refrigerant flowing in a portion at a high pressure side in the refrigerant circulation circuit, wherein the microcomputer judges an operating condition of the compressor based on a result detected by the current detection means and the high-pressure refrigerant temperature detection means, and wherein the microcomputer judges that there is breakage or coming-off of a wire of the driving means for the compressor when a temperature detected by the high-pressure refrigerant temperature detection means does not change and a value detected by the current detection means is equal to or lower than a current value detected at the operation of the high-pressure switch.
  • display means for displaying breakage or coming-off of a wire of the driving means for the compressor according to an instruction from the microcomputer.
  • high-pressure refrigerant temperature detection means for detecting a temperature of the refrigerant flowing in a portion at a high pressure side in the refrigerant circulation circuit, wherein the microcomputer judges an operating condition of the compressor based on a result detected by the current detection means and the high-pressure refrigerant temperature detection means, and wherein the microcomputer judges that the current detection means is abnormal when a temperature detected by the high-pressure refrigerant temperature detection means shows a change of rise and a value detected by the current detection means is equal to or lower than a current value detected at the operation of the high-pressure switch.
  • display means for displaying an abnormal condition of the current detection means according to an instruction from the microcomputer.
  • the microcomputer judges that the current detection means is not correctly set to a power source line of the compressor when a temperature detected by the high-pressure refrigerant temperature detection means shows a change of rise and a value detected by the current detection means is equal to or lower than a current value detected at operation of the high-pressure switch.
  • the high-pressure refrigerant temperature detection means detects the temperature of the refrigerant discharged from the compressor.
  • the high-pressure refrigerant temperature detection means detects the temperature of the condenser.
  • the high-pressure refrigerant temperature detection means detects the temperature of an outlet port of the condenser.
  • FIG 1 is a diagram showing the general construction of the air conditioner according to Embodiment 1.
  • reference numeral 1 designates a compressor for compressing a refrigerant.
  • a refrigerant circulation circuit is formed by connecting successively the compressor 1, a four-way valve 2, a condenser 3, a motor-driven expansion valve 4, and an evaporator 5 with refrigerant pipes in a loop form to thereby form a refrigeration cycle.
  • Reference numeral 6 designates a control board for controlling an outdoor unit and numeral 7 designates a microcomputer for controlling outdoor unit (hereinbelow, referred to as simply a microcomputer), mounted on the control board 6.
  • Numeral 8 designates a high-pressure switch, actuated depending on the magnitude of pressure of the refrigerant discharged from the compressor
  • numeral 9 designates a low-pressure switch, actuated depending on the magnitude of pressure of the refrigerant sucked into the compressor. Data indicating operating conditions of the low-pressure switch 9 are taken into the microcomputer 7.
  • Numeral 10 designates a thermo-switch, actuated depending on a temperature of the compressor 1. Data indicating operating conditions of the thermo-switch 10 are taken into the microcomputer 7.
  • the motor-driven expansion valve 4, which controls the flow rate of the refrigerant, is controlled in accordance with an instruction from the microcomputer 7.
  • high-pressure refrigerant temperature detection means As means for detecting the temperature of the refrigerant at a high pressure side in the refrigerant circulation circuit (hereinbelow referred to as high-pressure refrigerant temperature detection means), there are provided a thermistor 11 for detecting the temperature of the refrigerant discharged from the compressor 1, a thermistor 12 for detecting the temperature of the condenser 3, a thermistor 13 for detecting the temperature of an outlet port of the condenser. Data detected by the thermistors 11 to 13 are taken into the microcomputer 7.
  • Numeral 14 designates a monitor screen, as displaying means for displaying various kinds of data, provided on the control board 6, and numeral 15 designates a current sensor, as current detection means, which has a structure that a wire for detecting an electric current is inserted into an annular iron core, by which an operating current for the compressor 1 is detected based on a change of the magnitude of an electric current flowing in the wire, whereby the magnitude of an induced power is changed by a mutual induction effect.
  • a current value detected by the current sensor 15 is taken into the microcomputer 7 through a transducing circuit 16.
  • Numeral 17a designates a contactor of compressor controlling relay.
  • the contactor of compressor controlling relay 17a is connected to the compressor 1 with wires 18. Operations of the compressor 1 are controlled by opening and closing the contactor of compressor controlling relay 17a, whereby a commercial power source 21 is supplied or interrupted. Any one of the wires 18 connectable to the compressor 1 is inserted into the annular iron core of the current sensor 15.
  • Numeral 17b designates an excitation coil of compressor controlling relay, as driving means for driving the compressor 1.
  • Numeral 19a designates a control relay for controlling the application and interruption of a voltage to the excitation coil of compressor controlling relay 17b.
  • Numeral 19b designates an excitation coil of the control relay 19a. The excitation coil 19b is controlled according to an instruction from the microcomputer 7 via a driving circuit 20.
  • the contactor of the high pressure switch 8 is inserted in series between the excitation coil of compressor controlling relay 17b and the control relay 19a for the compressor controlling relay.
  • the microcomputer 7 reads a temperature determined with a remote controller connected to the indoor unit and a temperature detected by a thermistor for detecting room temperature at Step 201.
  • Step 202 the temperature determined with the remote controller and the temperature detected by the thermistor, which are read in Step 201, are compared to judge whether or not the compressor 1 is under an operation condition.
  • Step 240 judgment is made whether an operating current for the compressor 1 detected by the current sensor 15 is equal to or lower than a current value detected when the high-pressure switch is operated.
  • Step 204 When the operating current for the compressor 1 detected by the current sensor 15 is higher than the current value detected at the operation of the high-pressure switch at Step 204, the procedure returns to Step 203 to continue the operation of the compressor 1.
  • Step 204 when the operating current for the compressor 1 detected by the current sensor 15 is equal to or lower than the temperature value detected at the operation of the high-pressure switch, the compressor 1 is stopped at Step 205.
  • the presence or the absence of the operation of the high-pressure switch 8 can be judged from a result of detection by the current sensor 15.
  • a three-phase commercial power source 21 is used as means for applying a voltage to the compressor 1.
  • the same effect is obtainable even in a case of using a single-phase commercial power source.
  • FIG. 3 is a flow chart showing a method for displaying an operating condition of the air conditioner on the monitor screen when the operation of the high-pressure switch is detected
  • Figure 4 is a diagram showing an example of a display on the monitor screen.
  • the construction of the air conditioner according to Embodiment 2 is the same as that shown in Figure 1.
  • the microcomputer 7 reads a temperature determined with the remote controller connected to the indoor unit and a temperature detected by a thermistor for detecting room temperature at Step 301.
  • Step 302 the temperature determined with the remote controller and the temperature detected by the thermistor, which are read at Step 301, are compared to judge whether or not the compressor 1 is under an operating condition.
  • Step 302 When the compressor 1 is not under the operating condition at Step 302, the procedure returns to Step 301. Then, the microcomputer 7 reads again the temperature determined with the remote controller for the indoor unit and a temperature detected by the thermistor.
  • Step 302 When the compressor 1 is under the operating condition at Step 302, the compressor 1 is operated at Step 303. At the next Step 304, the fact that the compressor 1 is driven is displayed in a coded form.
  • Step 305 judgment is made whether an operating current for the compressor 1 detected by the current sensor 15 is equal to or lower than a current value detected when the high-pressure switch is operated.
  • Step 305 When the operating current for the compressor 1 detected by the current sensor 15 is higher than the current value detected at the operation of the high-pressure switch at Step 305, the procedure returns to Step 303 to continue the operation of the compressor 1.
  • Step 305 when the operating current for the compressor 1 detected by the current sensor 15 is equal to or lower than the current value detected at the operation of the high-pressure switch, the compressor 1 is stopped at Step 306.
  • Step 307 the fact that the high-pressure switch 8 is actuated to stop the compressor 1 is displayed in a coded form on the monitor screen 14 as shown in Figure 4.
  • the presence or the absence of the operation of the high-pressure switch 8 can be displayed on the monitor screen 14 from a result of detection by the current sensor 15. Accordingly, efficiency in maintenance work is increased.
  • FIG. 5 is a flow chart for detecting the fact that a wire comes off or is disconnected, or a wire is not correctly set, on the basis of a change of temperature detected by the current sensor and the thermistor for detecting the temperature of the refrigerant at a discharge side of the refrigerant circulation circuit
  • Figures 6 and 7 are diagrams showing examples of a display on the monitor screen.
  • the construction of the air conditioner according to Embodiment 3 is the same as that in Figure 1.
  • the microcomputer 7 reads a temperature determined with the remote controller connected to the indoor unit and a temperature detected by the thermistor for detecting room temperature.
  • Step 502 the temperature determined with the remote controller and the temperature detected by the thermistor, which are read at Step 501, are compared to judge whether or not the compressor 1 is under an operating condition.
  • Step 502 the procedure returns to Step 501 at which the microcomputer 7 reads again the temperature determined with the remote controller for the indoor unit and a temperature detected by the thermistor for detecting room temperature.
  • Step 502 When the compressor 1 is under the operating condition at Step 502, a temperature (T0) obtainable from a thermistor 11 for detecting the temperature of the refrigerant at a discharge side is taken at Step 503. Then, the compressor 1 is operated at Step 504. Further, the fact that the compressor 1 is operated is displayed in a coded form at Step 505.
  • Step 506 a timer t1 which operates the compressor 1 for a predetermined time is set.
  • Step 507 a decrement of count of the time t1 for operating the compressor 1 for a predetermined time, which is set at Step 506, is started.
  • Step 508 judgment is made as to whether or not the operation of a predetermined time (t1) of the compressor 1 is finished.
  • the operation of the compressor 1 is continued at Step 509, and the procedure returns to Step 507.
  • the microcomputer reads a temperature (T1) of the refrigerant detected by the thermistor 11 for detecting the temperature of the refrigerant discharged from the compressor 1 after it has been operated for a predetermined time (t1) at Step 510.
  • Step 511 the temperature (T0) of the refrigerant detected by the thermistor 11, read at Step 503, and the temperature (T1) of the refrigerant detected by the thermistor 11, read at Step 510, are compared.
  • Step 516 when the operating current for the compressor 1 is equal to or lower than the current value detected at the operation of the high-pressure switch, the compressor 1 is stopped at Step 517. Then, a signal of error indicating that there is a fault of coming-off or disconnection of a wire in the electric circuit to which the contact of the high-pressure switch 8 or the excitation coil 17b of the compressor controlling relay is connected, is displayed on the monitor screen 14 as shown in Figure 6, at Step 518.
  • a change in the temperature of the refrigerant is detected based on a temperature detected by the thermistor 11 for detecting the temperature of the refrigerant discharged from the compressor.
  • the same effect is obtainable even by judging based on a temperature detected by the thermistor 12 for detecting the temperature of the condenser or the thermistor 13 for detecting the temperature of an outlet port of the condenser.
  • the presence or the absence of the operation of the high-pressure switch can be judged from a result of detection by the current detecting means. Accordingly, the operation of the high-pressure switch to stop the compressor can be judged in a very short time.
  • the microcomputer makes judgment of the coming-off or disconnection of a wire in the driving circuit for the compressor on the basis of a temperature detected by the high-pressure refrigerant temperature detection means and a current value detected by the current detection means.
  • a signal indicating the disconnection or the coming-off of a wire in the driving circuit for the compressor can be displayed on the displaying means according to an instruction from the microcomputer. Accordingly, a problem that an electric current can not be supplied to the driving circuit for the compressor, so that the air conditioner is disabled, can be eliminated, and efficiency in maintenance work is increased.
  • the microcomputer judges abnormality in the current detection means based on a temperature detected by the high-pressure refrigerant temperature detection means and a current value detected by the current detection means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Claims (11)

  1. Appareil de conditionnement d'air comprenant:
    un circuit de circulation de fluide frigorigène pour faire circuler un fluide frigorigène déchargé d'un compresseur (1) vers un évaporateur (5) à travers un condenseur (3);
    un moyen de détection de courant (15) pour détecter un courant de fonctionnement pour le compresseur (1);
    un micro-ordinateur (7) pour estimer une condition de fonctionnement du compresseur (1) sur la base d'un résultat détecté par le moyen de détection de courant (15);
    un moyen d'activation conçu pour recevoir une instruction en provenance du micro-ordinateur (7) pour activer le compresseur (1); et
    un commutateur haute pression (8) qui est relié en série au circuit électrique du moyen d'activation et peut fonctionner sur la base d'une pression de refoulement du compresseur (1);
       caractérisé en ce que le micro-ordinateur (7) estime l'absence ou la présence de fonctionnement du commutateur haute pression (8) sur la base du résultat détecté par le moyen de détection de courant ( 15).
  2. Appareil de conditionnement d'air selon la revendication 1, comprenant un moyen d'affichage pour afficher une condition de fonctionnement du compresseur (1) conformément à une instruction en provenance du micro-ordinateur (7).
  3. Appareil de conditionnement d'air selon la revendication 1, comprenant en outre:
    des moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13) pour détecter une température du fluide frigorigène circulant dans une partie d'un côté à haute pression dans le circuit de circulation de fluide frigorigène;
    dans lequel le micro-ordinateur (7) estime une condition de fonctionnement du compresseur (1) sur la base d'un résultat détecté par le moyen de détection de courant (15) et les moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13); et
    dans lequel le micro-ordinateur (7) estime qu'il y a une rupture ou un détachement d'un fil du moyen d'activation pour le compresseur lorsqu'une température détectée par les moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13) ne varie pas et qu'une valeur détectée par le moyen de détection de courant (15) est égale ou inférieure à une intensité de courant détectée lors du fonctionnement du commutateur haute pression (8).
  4. Appareil de conditionnement d'air selon la revendication 3, comprenant un moyen d'affichage pour afficher la rupture ou le détachement d'un fil du moyen d'activation pour le compresseur (1) conformément à une instruction en provenance du micro-ordinateur (7).
  5. Appareil de conditionnement d'air selon la revendication 1, comprenant en outre:
    des moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13) pour détecter une température du fluide frigorigène circulant dans une partie du côté à haute pression dans le circuit de circulation de fluide frigorigène;
    dans lequel le micro-ordinateur (7) estime une condition de fonctionnement du compresseur (1) sur la base d'un résultat détecté par le moyen de détection de courant (15) et les moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13); et
    dans lequel le micro-ordinateur (7) estime que le moyen de détection de courant (15) est anormal lorsqu'une température détectée par les moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13) montre une variation ascendante et qu'une valeur détectée par le moyen de détection de courant (15) est égale ou inférieure à une intensité de courant détectée lors du fonctionnement du commutateur haute pression (8).
  6. Appareil de conditionnement d'air selon la revendication 5, comprenant un moyen d'affichage pour afficher une condition anormale du moyen de détection de courant ( 15) conformément à une instruction du micro-ordinateur (7).
  7. Appareil de conditionnement d'air selon la revendication 1, dans lequel le moyen de détection de courant (15) a une structure dans laquelle un fil destiné à détecter un courant de fonctionnement pour le compresseur (1) est inséré dans un noyau de fer annulaire pour détecter une grandeur de puissance électrique induite, en raison d'un effet d'induction mutuel, en fonction de l'intensité d'un courant électrique circulant dans le fil.
  8. Appareil de conditionnement d'air selon la revendication 5, dans lequel le micro-ordinateur (7) estime que le moyen de détection de courant (15) n'est pas correctement mis en place sur une ligne de source d'énergie du compresseur (1) lorsqu'une température détectée par les moyens de détection de température de fluide frigorigène à haute pression (11; 12; 13) montre une variation ascendante et qu'une valeur détectée par le moyen de détection de courant (15) est égale ou inférieure à une intensité de courant détectée lors du fonctionnement du commutateur haute pression (8).
  9. Appareil de conditionnement d'air selon la revendication 3 ou 5, dans lequel le moyen de détection de température de fluide frigorigène à haute pression (11) détecte la température du fluide frigorigène déchargé du compresseur (1).
  10. Appareil de conditionnement d'air selon la revendication 3 ou 5, dans lequel le moyen de détection de température de fluide frigorigène à haute pression (12) détecte la température du condenseur (3).
  11. Appareil de conditionnement d'air selon la revendication 3 ou 5, dans lequel le moyen de détection de température de fluide frigorigène à haute pression (13) détecte la température d'un orifice de sortie du condenseur (3).
EP00307919A 1999-09-24 2000-09-13 Dispositif de conditionnement d'air Expired - Lifetime EP1087184B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP27036299A JP3703346B2 (ja) 1999-09-24 1999-09-24 空気調和機
JP27036299 1999-09-24

Publications (3)

Publication Number Publication Date
EP1087184A2 EP1087184A2 (fr) 2001-03-28
EP1087184A3 EP1087184A3 (fr) 2002-10-02
EP1087184B1 true EP1087184B1 (fr) 2005-05-04

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EP00307919A Expired - Lifetime EP1087184B1 (fr) 1999-09-24 2000-09-13 Dispositif de conditionnement d'air

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EP (1) EP1087184B1 (fr)
JP (1) JP3703346B2 (fr)
CN (1) CN1135337C (fr)
ES (1) ES2241555T3 (fr)

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CN1135337C (zh) 2004-01-21
CN1292479A (zh) 2001-04-25
ES2241555T3 (es) 2005-11-01
JP3703346B2 (ja) 2005-10-05
EP1087184A2 (fr) 2001-03-28

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