An air-conditioning apparatus according to the present invention includes at least indoor heat exchangers. In response to a request to increase heat exchange performance from the indoor heat exchanger, the air-conditioning apparatus decreases a heat exchange capacity of an outdoor heat exchanger and
An air-conditioning apparatus according to the present invention includes at least indoor heat exchangers. In response to a request to increase heat exchange performance from the indoor heat exchanger, the air-conditioning apparatus decreases a heat exchange capacity of an outdoor heat exchanger and controls an opening degree of an expansion valve corresponding to the indoor heat exchanger to decrease a flow rate of a refrigerant that flows through the indoor heat exchanger.
대표청구항▼
1. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, a
1. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator; anda controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operate in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operate in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger, andcontrols the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger. 2. The air-conditioning apparatus of claim 1, wherein if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger. 3. The air-conditioning apparatus of claim 1, wherein when the controller increases the heat exchange performance of the first use side heat exchanger in a statewhere all of the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger are functioning as condensers and the heat exchange capacity of the heat source side heat exchanger is controlled such that condensing saturation temperatures of the refrigerant that flows through the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger become a predetermined condensing saturation temperature target value,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by increasing a value of the condensing saturation temperature target value. 4. The air-conditioning apparatus of claim 1, wherein when the controller increases the heat exchange performance of the first use side heat exchanger in a statewhere all of the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger are functioning as evaporators and the heat exchange capacity of the heat source side heat exchanger is controlled such that evaporating saturation temperatures of the refrigerant that flows through the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger become a predetermined evaporating saturation temperature target value,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by decreasing a value of the evaporating saturation temperature target value. 5. The air-conditioning apparatus of claim 3, wherein when the controller increases the heat exchange performance of the first use side heat exchanger while controlling the opening degree of the expansion devices corresponding to the first use side heat exchanger and the second use side heat exchanger that are functioning as condensers such that a degree of subcooling of the refrigerant that flows through the first use side heat exchanger and the second use side heat exchanger becomes a predetermined target degree of subcooling,the controllerdecreases the flow rate in the second use side heat exchanger by increasing the target degree of subcooling. 6. The air-conditioning apparatus of claim 4, wherein when the controller increases the heat exchange performance of the first use side heat exchanger while controlling the opening degree of the expansion devices corresponding to the first use side heat exchanger and the second use side heat exchanger that are functioning as evaporators such that a degree of superheat of the refrigerant that flows through the first use side heat exchanger and the second use side heat exchanger becomes a predetermined target degree of superheat,the controllerdecreases the flow rate in the second use side heat exchanger by increasing the target degree of superheat. 7. The air-conditioning apparatus of claim 1, further comprising: an air-sending device configured to blow air to the heat source side heat exchanger, whereinthe controllercontrols the heat exchange capacity of the heat source side heat exchanger with a rotation speed of the air-sending device. 8. The air-conditioning apparatus of claim 1, further comprising: a heat exchanger opening and closing device configured to close some or all of refrigerant heat transfer pipes of the heat source side heat exchanger; and a heat exchanger bypass device configured to allow part or all of the refrigerant that flows through the heat source side heat exchanger to bypass the heat source side heat exchanger, whereinthe controllercontrols the heat exchange capacity of the heat source side heat exchanger by opening or closing the heat exchanger opening and closing device and the heat exchanger bypass device. 9. The air-conditioning apparatus of claim 1, wherein at least one of the use side heat exchangers is an intermediate heat exchanger at which the refrigerant supplied from the heat source side heat exchanger and a heat medium different from the refrigerant exchange heat,at least one of a rest of the use side heat exchangers is a direct expansion heat exchanger at which the refrigerant supplied from the heat source side heat exchanger and indoor air exchange heat,the air-conditioning apparatus comprises at least one indirect heat exchanger which is connected to a heat medium passage of the intermediate heat exchangers and at which the heat medium and indoor air exchange heat,the first use side heat exchanger is the intermediate heat exchanger, andthe second use side heat exchanger in which the flow rate of the refrigerant is decreased when the heat exchange performance of the first use side heat exchanger is increased is the direct expansion heat exchanger. 10. The air-conditioning apparatus of claim 9, wherein in a state where at least one of the intermediate heat exchangers is functioning as a condenser and at least one of the other intermediate heat exchangers is functioning as an evaporators,the first use side heat exchanger is the intermediate heat exchanger connected to the indirect heat exchanger having a larger heat exchange load, andthe second use side heat exchanger in which the flow rate of the refrigerant is decreased when the heat exchange performance of the first use side heat exchanger is increased is the direct expansion heat exchanger. 11. The air-conditioning apparatus of claim 1, wherein when the heat source side heat exchanger uses water or brine as a heat source,the controllercontrols the heat exchange capacity of the heat source side heat exchanger by adjusting a flow rate of the water or the brine. 12. The air-conditioning apparatus of claim 1, further comprising: an air-sending device configured to blow air to the second use side heat exchanger, whereinwhen the controller increases the heat exchange performance of the first use side heat exchanger,the controllerdecreases a heat exchange capacity of the second use side heat exchanger by decreasing a rotation speed of the air-sending device for the second use side heat exchanger. 13. The air-conditioning apparatus of claim 3, wherein in an operation mode in which the first use side heat exchanger and the second use side heat exchanger function as condensers and in which the third use side heat exchanger and the fourth use side heat exchanger function as evaporators,the controller is configured to control an operation capacity of the compressor such that an evaporating saturation temperature of the refrigerant that flows through the third use side heat exchanger and the fourth use side heat exchanger becomes a predetermined evaporating saturation temperature target value, andin response to a request to increase heat exchange performance from the third use side heat exchanger,the controllerincreases the operation capacity of the compressor by decreasing a value of the evaporating saturation temperature target value, andcontrols the opening degree of the expansion devices corresponding to the fourth use side heat exchanger to decrease a flow rate of the refrigerant that flows through the fourth use side heat exchanger. 14. The air-conditioning apparatus of claim 4, wherein in an operation mode in which the first use side heat exchanger and the second use side heat exchanger function as evaporators and in which the third use side heat exchanger and the fourth use side heat exchanger function as condensers,the controller is configured to control an operation capacity of the compressor such that a condensing saturation temperature of the refrigerant that flows through the third use side heat exchanger and the fourth use side heat exchanger becomes a predetermined condensing saturation temperature target value, andin response to a request to increase heat exchange performance from the third use side heat exchanger,the controllerincreases the operation capacity of the compressor by increasing a value of the condensing saturation temperature target value, andcontrols the opening degree of the expansion devices corresponding to the fourth use side heat exchanger to decrease a flow rate of the refrigerant that flows through the fourth use side heat exchanger. 15. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator; anda controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operate in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operate in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger, controls the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger, if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger, andwhen the controller increases the heat exchange performance of the first use side heat exchangerin a state where all of the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger are functioning as condensers and the heat exchange capacity of the heat source side heat exchanger is controlled such that condensing saturation temperatures of the refrigerant that flows through the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger become a predetermined condensing saturation temperature target value,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by increasing a value of the condensing saturation temperature target value. 16. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator; anda controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operate in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operate in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger,controls the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger,if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger, andwhen the controller increases the heat exchange performance of the first use side heat exchangerin a state where all of the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger are functioning as evaporators and the heat exchange capacity of the heat source side heat exchanger is controlled such that evaporating saturation temperatures of the refrigerant that flows through the heat source side heat exchanger, the first use side heat exchanger, and the second use side heat exchanger become a predetermined evaporating saturation temperature target value,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by decreasing a value of the evaporating saturation temperature target value. 17. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator;a controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value; andan air-sending device configured to blow air to the heat source side heat exchanger, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operate in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operate in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger,controls the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger, if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger, andcontrols the heat exchange capacity of the heat source side heat exchanger with a rotation speed of the air-sending device. 18. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator;a controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value;a heat exchanger opening and closing device configured to close some or all of refrigerant heat transfer pipes of the heat source side heat exchanger; anda heat exchanger bypass device configured to allow part or all of the refrigerant that flows through the heat source side heat exchanger to bypass the heat source side heat exchanger, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operate in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operate in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger,controls the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger, if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger, andcontrols the heat exchange capacity of the heat source side heat exchanger by opening or closing the heat exchanger opening and closing device and the heat exchanger bypass device. 19. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator; anda controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operation in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operation in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger,controls the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger, if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger,at least one of the use side heat exchangers is an intermediate heat exchanger at which the refrigerant supplied from the heat source side heat exchanger and a heat medium different from the refrigerant exchange heat,at least one of a rest of the use side heat exchangers is a direct expansion heat exchanger at which the refrigerant supplied from the heat source side heat exchanger and indoor air exchange heat,the air-conditioning apparatus comprises at least one indirect heat exchanger which is connected to a heat medium passage of the intermediate heat exchangers and at which the heat medium and indoor air exchange heat,the first use side heat exchanger is the intermediate heat exchanger, andthe second use side heat exchanger in which the flow rate of the refrigerant is decreased when the heat exchange performance of the first use side heat exchanger is increased is the direct expansion heat exchanger. 20. An air-conditioning apparatus comprising: a compressor configured to compress a refrigerant;a plurality of use side heat exchangers each configured to function as a condenser or an evaporator;a plurality of expansion devices each provided for a corresponding one of the use side heat exchangers, and each configured to adjust a flow rate of the refrigerant that flows through the corresponding use side heat exchanger;a heat source side heat exchanger configured to function as a condenser or an evaporator; anda controller configured to control opening degrees of the plurality of expansion devices, and a heat exchange capacity of the heat source side heat exchanger such that a saturation temperature at which the refrigerant condenses or evaporates becomes a predetermined saturation temperature target value, whereinthe plurality of use side heat exchangers comprises a first use side heat exchanger that is configured to operation in an operation mode identical to an operation mode of the heat source side heat exchanger,a second use side heat exchanger that is different from the first use side heat exchanger and that is configured to operation in an operation mode identical to the operation mode of the heat source side heat exchanger, anda third use side heat exchanger and a fourth use side heat exchanger that are different from the first use side heat exchanger and the second use side heat exchanger,during an operation in which both of the third use side heat exchanger and the fourth use side heat exchanger function as condensers or evaporators, and both of the first use side heat exchanger and the second use side heat exchanger function as condensers or evaporators,in response to a request to increase heat exchange performance from the first use side heat exchanger,the controllerdecreases the heat exchange capacity of the heat source side heat exchanger by changing a value of the saturation temperature target value of the heat source side heat exchanger,controls the opening degree of the expansion devices corresponding to the second use side heat exchanger to decrease a flow rate of the refrigerant that flows through the second use side heat exchanger, if the controller determines that the heat exchange capacity of the heat source side heat exchanger has not reached a lower limit after the heat exchange capacity of the heat source side heat exchanger has been decreased,the controllercontrols the opening degree of the expansion devices corresponding to the first use side heat exchanger to increase a flow rate of the refrigerant that flows through the first use side heat exchanger,at least one of the use side heat exchangers is an intermediate heat exchanger at which the refrigerant supplied from the heat source side heat exchanger and a heat medium different from the refrigerant exchange heat,at least one of a rest of the use side heat exchangers is a direct expansion heat exchanger at which the refrigerant supplied from the heat source side heat exchanger and indoor air exchange heat,the air-conditioning apparatus comprises at least one indirect heat exchanger which is connected to a heat medium passage of the intermediate heat exchangers and at which the heat medium and indoor air exchange heat,in a state where at least one of the intermediate heat exchangers is functioning as a condenser and at least one of the other intermediate heat exchangers is functioning as an evaporator,the first use side heat exchanger is the intermediate heat exchanger connected to the indirect heat exchanger having a larger heat exchange load, andthe second use side heat exchanger in which the flow rate of the refrigerant is decreased when the heat exchange performance of the first use side heat exchanger is increased is the direct expansion heat exchanger.
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이 특허에 인용된 특허 (7)
Jung Nack-Hun,KRX, Air conditioner and control apparatus thereof.
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