JP4628157B2 - Refrigeration cycle equipment - Google Patents

Description

  The present invention relates to a refrigeration cycle apparatus using the refrigerant, especially associated with the current control.

  Regarding power control of air conditioners, a technique is known in which each air conditioner is controlled according to priority in a house where a plurality of air conditioners are arranged, and the power consumption is controlled to a certain value or less (for example, Patent Document 1). ).

JP-5-164376 discloses (paragraph [0010], etc. Figure 1)

  However, in the conventional refrigeration cycle device, when the load increases with respect to a predetermined power supply, the power supply voltage decreases and the current increases, and the breaker that is a protective device exceeds the allowable current of the transformer and overhead wires in the power supply device. In some cases, the refrigeration cycle devices of all the systems that are activated and connected to a predetermined power source are stopped. Transformer capacity is determined by multiplying a certain rate (usage rate, maximum generation rate (<1.0), etc.) instead of the maximum number because the load generation timing varies depending on the application. If it exceeds, the breaker, which is a protective device, is activated. In order to prevent the breaker from operating, the total current of the load can be obtained from the maximum current of each device and the transformer capacity can be selected. However, this has the problem of increasing the cost.

  The present invention has been made in order to solve the above problems, and proposes a refrigeration cycle apparatus capable of continuing the operation by suppressing the operation current below the allowable current even when the load increases. is there.

The refrigeration cycle apparatus of the present invention is an outdoor unit having a compressor, a flow path switching device and an outdoor heat exchanger, an indoor unit having an indoor heat exchanger and a flow rate adjusting valve for adjusting the flow rate of the indoor heat exchanger, A refrigeration cycle apparatus comprising: a fan that blows air to the outdoor heat exchanger; and a compressor, a flow path switching device, an outdoor heat exchanger, an indoor heat exchanger, and a flow rate adjustment valve connected by a refrigerant circuit. A voltage detecting device that repeatedly detects the operating voltage of the refrigeration cycle device at a predetermined interval, and when the operating voltage detected by the voltage detecting device drops to a predetermined voltage value, the outdoor unit and the indoor Operation control means that acts on the machine and suppresses an increase in the operating current of the refrigeration cycle apparatus, and the operation control means is configured to perform a previous operation when the operating voltage detected by the voltage detector is lower than a predetermined voltage value. When the operation voltage detected by the voltage detection device during the operation in the first operation mode in which the operation frequency of the compressor is lowered and the operation is continued is lower than a predetermined voltage value Further, the operation voltage detected by the voltage detection device between the second operation mode in which the operation is continued with the opening degree of the flow rate control valve being reduced and the operation in the second operation mode is a predetermined voltage value. A third operation mode for continuing the operation by increasing the air volume of the fan when lower, and repeating the first operation mode, the second operation mode, and the third operation mode in order It is .

The refrigeration cycle apparatus of the present invention operates on an outdoor unit and an indoor unit when a voltage detection device that detects an operation voltage of the refrigeration cycle device and an operation voltage detected by the voltage detection device drops to a predetermined voltage value. And an operation control means for suppressing an increase in the operating current of the refrigeration cycle apparatus. Therefore, even if the load of the refrigeration cycle apparatus increases and the operation voltage decreases and the operation current increases, the increase is suppressed and the operation of the refrigeration cycle apparatus can be continued.

Embodiment 1. FIG.
Embodiment 1 relating to the present invention will be described below. FIG. 1 is a configuration diagram showing a main configuration of a refrigeration cycle apparatus according to Embodiment 1 of the present invention. This refrigeration cycle apparatus includes an outdoor unit 1 and an indoor unit 2.
The outdoor unit 1 includes a compressor 3 that constitutes a refrigerant circuit, a four-way valve 4 that is a flow path switching device, an outdoor heat exchanger 5, a supercooling circuit flow rate adjustment valve 6, a supercooling circuit 7, and an accumulator 12. The outdoor heat exchanger 5 includes an outdoor fan 5 </ b> A that blows air that exchanges heat with the refrigerant that passes through the outdoor heat exchanger 5. Moreover, it has the main power supply 14 which is alternating current power supply, and the outdoor control box 13 which controls the power supply from the main power supply 14 to refrigerating-cycle apparatuses, such as the compressor 3. FIG. The outdoor control box 13 includes a voltage detection device (for example, a voltmeter) 13A connected to a power supply terminal that supplies power to the refrigeration cycle device. The voltage detector 13A is for detecting the operating voltage of the refrigeration cycle apparatus.
The indoor unit 2 includes an indoor flow rate adjustment valve 9 and an indoor heat exchanger 10 that constitute a refrigerant circuit.
And the outdoor unit 1 and the indoor unit 2 are connected by the liquid side extension piping 8 and the gas side extension piping 11, and the compressor 3, the four-way valve 4, the outdoor heat exchanger 5, the supercooling circuit 7, and the supercooling circuit flow rate. A refrigeration cycle comprising a refrigerant circuit to which the regulating valve 6, the accumulator 12, the indoor heat exchanger 10, and the indoor flow rate regulating valve 9 are connected is configured.

Further, the refrigeration cycle apparatus includes an operation control unit 21 including an operation control unit that performs an operation current suppression control of each embodiment described later and a cold storage heat time extension control in an operation using a heat storage tank. The operation control unit 21 can be configured by a CPU (central processing unit) that performs calculation and control, a program that defines a predetermined operation processing procedure, and is operated by the CPU, or may be configured by a microcomputer.
Although the operation control part 21 acts on each apparatus which comprises a refrigeration cycle apparatus and can control them, the connection line with another apparatus is abbreviate | omitted in FIG. Moreover, the installation place of the operation control part 21 is not limited to the outdoor unit 1 shown in FIG. 1, and may be installed anywhere in the refrigeration cycle apparatus.

  In this refrigeration cycle apparatus, when the operating current increases and the operating voltage decreases to a predetermined voltage value (predetermined voltage), for example, when the operating voltage decreases by 5% (specifically, with respect to the rated voltage of 200V) In order to avoid the operation stop due to the operating current exceeding the breaker capacity), the operating frequency of the compressor 3 can be reduced to suppress the operating current of the refrigeration cycle apparatus and continue the operation. To. An example of the operation current suppression control controlled by the operation control unit 21 will be described based on the flowchart of FIG.

  During the operation, the refrigeration cycle apparatus detects the operating voltage using the voltage detector 13A (S1). Subsequently, the detected voltage is compared with a predetermined voltage (S2). If it is determined in S2 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the current operating frequency (S3). On the other hand, when it is determined in S2 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced (S4). Then, again, to detect the operating voltage using a voltage sensing device 13A (S5). If it is determined in S5 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the operation frequency reduced first (S6). On the other hand, when it is determined in S5 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced again (S5 to S4). S5~S4 step, the detection voltage is repeated until it is determined that the predetermined voltage or more. During operation of the refrigeration cycle device, voltage detection by the voltage detection device 13A is repeatedly performed at a predetermined interval to detect a decrease in the operation voltage of the refrigeration cycle device, so that the operation current is suppressed before reaching the allowable current. The operation of the refrigeration cycle apparatus can be continued.

  By the way, the predetermined voltage serving as a reference for reducing the operating frequency of the compressor 3 is a voltage corresponding to a current allowable value that allows the operation to be continued in consideration of a power breaker or the like when the refrigeration cycle apparatus is operated at that voltage. is there. The predetermined voltage is preferably selected by a switch in the outdoor control box 13 according to installation conditions. These also apply to the following embodiments.

  Conventionally, in order to continue the operation of the refrigeration cycle apparatus, it is necessary to know in advance the total load capacity that varies depending on the installation conditions. In the case of the first embodiment, the power supply voltage of each refrigeration cycle apparatus is detected. If the voltage drops, the compressor operating frequency is reduced to suppress the operating current so that it does not exceed the breaker capacity. Therefore, it is necessary to know the full load capacity of the refrigeration cycle device in advance. Absent.

  Also, when operating multiple refrigeration cycle devices, the voltage is detected by each refrigeration cycle device, and if the voltage drops, the compressor operating frequency is reduced so that the operating current does not exceed the breaker capacity. If so, it will not exceed the breaker capacity of the main power supply.

Embodiment 2. FIG.
The operating current of the refrigeration cycle apparatus of FIG. 1 can also be suppressed by restricting the indoor flow rate adjusting valve 9 disposed in the indoor unit 1 in order to control the flow rate of the indoor heat exchanger 10. In the second embodiment, control using this will be described based on the flowchart shown in FIG. In addition, although the operating current suppression control by only the indoor flow rate adjusting valve 9 is possible without reducing the operating frequency of the compressor 3, here, a method using both of them will be described.

  During the operation, the refrigeration cycle apparatus detects the operating voltage using the voltage detection device 13A (S11). Then, comparing the sensed detection voltage with a predetermined voltage (S12). When it is determined in S12 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the current operating frequency (S13). On the other hand, when it is determined in S12 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced (S14). Then, again, to detect the operating voltage using a voltage sensing device 13A (S15). Then, comparing the sensed detection voltage with a predetermined voltage (S16). If it is determined in S16 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the operation frequency reduced first (S17). On the other hand, when it is determined in S16 that the detected voltage is less than the predetermined voltage, the opening degree of the indoor flow rate adjusting valve 9 is reduced (S18). Then, again, to detect the operating voltage using a voltage sensing device 13A (S19). Subsequently, the detected voltage is compared with a predetermined voltage (S20). If it is determined in S20 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the operating frequency reduced first and the opening degree of the indoor flow rate adjusting valve 9 previously throttled (S21). On the other hand, when it is determined in S20 that the detected voltage is less than the predetermined voltage, the process returns to S14 to further reduce the operating current (S20 to S14). S20~S14 step, the detection voltage is repeated until it is determined that the predetermined voltage or more.

  In the second embodiment, during the operation of the refrigeration cycle apparatus, voltage detection by the voltage detection apparatus 13A is repeatedly performed at predetermined intervals to detect a decrease in the operation voltage of the refrigeration cycle apparatus. For this reason, the operating current is suppressed before reaching the allowable current, and the operation of the refrigeration cycle apparatus can be continued. The second embodiment is particularly effective for suppressing the operating current that cannot be dealt with only by reducing the operating frequency of the compressor 3.

Embodiment 3. FIG.
It is also possible to suppress the operating current of the refrigeration cycle apparatus of FIG. 1 by increasing the air volume of the outdoor fan 5A. When the air volume of the outdoor fan 5A provided in the outdoor heat exchanger 5 is increased, it seems that the operating current is increased by the increase in the air volume of the outdoor fan 5A, but the operating current of the entire refrigeration cycle apparatus is decreased. . This can be understood from FIG. That is, when the air volume of the outdoor fan 5A is increased, the high-pressure pressure of the refrigeration cycle apparatus is reduced and the refrigerant flow rate is reduced, so that the operating current (input current) of the compressor 3 is reduced. At this time, the amount of decrease in the operating current of the compressor 3 is larger than the amount of increase in the operating current (input current) of the fan 5A accompanying the increase in the air volume of the outdoor fan 5A, so the operating current of the entire refrigeration cycle apparatus decreases. Control using this will be described based on the flowchart shown in FIG. Note that the operating current suppression control can be performed only by the outdoor fan 5A without reducing the operating frequency of the compressor 3 and adjusting the opening of the indoor flow rate adjusting valve 9, but here, all of them are used here. Explain the method.

  Since steps S31 to S41 in FIG. 5 are the same as steps S11 to S21 in FIG. 3, the description thereof will be omitted, and only differences from FIG. 3 will be described. If it is determined in S40 that the detected voltage is less than the predetermined voltage, the air volume of the outdoor fan 5A is increased (S42). Then, the operating voltage is detected using the voltage detector 13A (S43). Subsequently, the detected voltage is compared with a predetermined voltage (S44). If it is determined in S44 that the detected voltage is equal to or higher than the predetermined voltage, the operating frequency at which the compressor 3 has been reduced first, the opening degree of the indoor flow rate adjusting valve 9 that has been throttled first, and the outdoor fan 5A that has been increased first. The operation is continued with the air volume (S45). On the other hand, if it is determined in S44 that the detected voltage is less than the predetermined voltage, the process returns to S34 to further reduce the operating current (S44 to S34). Steps S44 to S34 are repeated until it is determined that the detected voltage is equal to or higher than the predetermined voltage.

  In the third embodiment, during operation of the refrigeration cycle apparatus, voltage detection by the voltage detection device 13A is repeatedly performed at predetermined intervals to detect a decrease in the operation voltage of the refrigeration cycle apparatus. For this reason, the operating current is suppressed before reaching the allowable current, and the operation of the refrigeration cycle apparatus can be continued. The third embodiment is particularly effective for suppressing the operating current that cannot be dealt with only by reducing the operating frequency of the compressor 3 and adjusting the opening of the indoor flow rate adjusting valve 9.

Embodiment 4 FIG.
FIG. 6 is a configuration diagram illustrating a main configuration of a refrigeration cycle apparatus (thermal storage refrigeration cycle apparatus) in which a heat storage tank 15 capable of storing or storing heat is added to the outdoor unit 1 of the refrigeration cycle apparatus illustrated in FIG. 1. The difference from FIG. 1 is that the heat storage tank 15 in which water as a heat storage medium is stored is connected to the outdoor unit 1 and the indoor unit via the electromagnetic valves A to D (reference numerals 17 to 20) and the flow rate adjusting valve 16 in the heat storage tank. It is added to the refrigerant circuit of the refrigeration cycle composed of two.
When the cooling operation or the heating operation is performed using the refrigeration cycle apparatus of FIG. 6, the operation current suppression control method shown in the first to third embodiments can be applied as it is.

  In the refrigeration cycle apparatus of FIG. 6, power consumption can be reduced by performing a cold storage operation for cooling the water in the heat storage tank 15 or making ice at midnight and using the cold water or ice in the daytime. In this refrigeration cycle device, if the operating current increases during cold storage operation at midnight, and the operating current exceeds the breaker capacity and stops abnormally, the daytime operation of the day cannot be operated using cold water or ice, and power consumption is reduced. Reduction cannot be achieved. Therefore, the operating voltage is also detected here, and the operating frequency of the compressor 3 during the cold storage operation is reduced before the abnormal stop, so that the cold storage operation is continued.

  However, when the operating frequency of the compressor 3 during the cold storage operation is reduced, the capacity is lowered and the cold storage state of the heat storage tank 15 is affected. Therefore, the cold storage operation time is reduced according to the reduction of the operating frequency of the compressor 3. It is preferable to secure the reduced ability by extending. FIG. 7 is an explanatory diagram relating to this, and represents the relationship between the operating frequency, operating time, and heat storage tank water temperature of the compressor in the cold storage operation. As shown in FIG. 7, relationship data between the cold storage operation time and the heat storage tank water temperature at a plurality of operation frequencies is stored in the operation control unit 21 in advance. When the operating frequency of the compressor 3 is decreased by ΔF (= F1−F2) corresponding to the increase in the operating current of the refrigeration cycle, it is necessary based on the corresponding operating frequency with reference to the above relational data. The cool storage operation extension time ΔT (= T2−T1) is calculated, and the operation time extended by that time ΔT is reset to ensure the cool storage capacity.

Next, an example of the operation current suppression control controlled by the operation control unit 21 during the cold storage operation will be described based on the flowchart of FIG.
During the operation, the refrigeration cycle apparatus detects the operating voltage using the voltage detecting device 13A (S51). Subsequently, the detected voltage is compared with a predetermined voltage (S52). If it is determined in S52 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the current operating frequency (S53). On the other hand, when it is determined in S52 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced from F1 to F2 (S54). Next, the cold storage operation extension time ΔT is calculated according to the decrease in the operation frequency ΔF (= F1−F2) of the compressor 3 by the method described above (S55). Then, the operating voltage is detected again using the voltage detector 13A (S56). Furthermore, the detected voltage is compared with a predetermined voltage (S57). In S57, when it is determined that the detected voltage is equal to or higher than the predetermined voltage, the cool storage operation is continued by extending the operation time by ΔT from the end time in the case of the operation frequency F1 at which the compressor 3 is reduced first. (S58). On the other hand, when it is determined in S57 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced again (S57 to S54). Steps S57 to S54 are repeated until it is determined that the detected voltage is equal to or higher than the predetermined voltage.

  According to the fourth embodiment, when the voltage decreases during the cold storage operation, the operation stop of the compressor 3 is avoided by reducing the operation frequency of the compressor 3, and the cold storage operation according to the reduction of the operation frequency of the compressor 3 is performed. By extending the time, the target amount can be stored. Thereby, the cooling operation using the cold water or ice of the heat storage tank 15 becomes possible, and it can contribute to efficient power consumption.

Embodiment 5. FIG.
In the refrigeration cycle apparatus of FIG. 6, it is possible to improve the heating capacity in the early morning by performing a heat storage operation for warming the water in the heat storage tank 15 at midnight and using the hot water in the daytime. With this refrigeration cycle device, if the operating current increases during the late-night heat storage operation and the operating current exceeds the breaker capacity and stops abnormally, the operation using hot water cannot be performed in the early morning operation of the day, and the heating capacity can be improved. Disappear. Therefore, the operating voltage is detected here, and the operating frequency of the compressor 3 during the heat storage operation is reduced before the abnormal stop, so that the heat storage operation is continued.

  However, when the operating frequency of the compressor 3 during the heat storage operation is reduced, the capacity is reduced, and the heat storage state of the heat storage tank 15 is affected. Therefore, the heat storage operation time according to the reduction of the operation frequency of the compressor 3 It is preferable to secure the reduced ability by extending the length. FIG. 9 is an explanatory diagram relating to this, and represents the relationship between the operating frequency of the compressor, the operating time, and the heat storage tank water temperature in the heat storage operation. As shown in FIG. 9, relationship data between the heat storage operation time and the heat storage tank water temperature at a plurality of operation frequencies is stored in the operation control unit 21 in advance. When the operating frequency of the compressor 3 is decreased by ΔF (= F1−F2) corresponding to the increase in the operating current of the refrigeration cycle, the necessary data is referred to based on the corresponding operating frequency with reference to the above relational data. The heat storage operation extension time ΔT (= T2−T1) is calculated, and the operation time extended by the time ΔT is reset to secure the cold storage capacity.

Next, an example of the operation current suppression control controlled by the operation control unit 21 during the heat storage operation will be described based on the flowchart of FIG.
During the operation, the refrigeration cycle apparatus detects the operating voltage using the voltage detecting device 13A (S61). Subsequently, the detected voltage is compared with a predetermined voltage (S62). If it is determined in S62 that the detected voltage is equal to or higher than the predetermined voltage, the compressor 3 is continuously operated at the current operating frequency (S63). On the other hand, when it is determined in S62 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced from F1 to F2 (S64). Next, the heat storage operation extension time ΔT is calculated according to the decrease in the operation frequency ΔF (= F1−F2) of the compressor 3 by the method described above (S65). Then, the operating voltage is detected again using the voltage detector 13A (S66). Further, the detected voltage is compared with a predetermined voltage (S67). If it is determined in S67 that the detected voltage is equal to or higher than the predetermined voltage, the heat storage operation is continued by extending the operation time by ΔT from the end time in the case of the operation frequency F1 at which the compressor 3 has been reduced first. (S68). On the other hand, when it is determined in S67 that the detected voltage is less than the predetermined voltage, the operating frequency of the compressor 3 is reduced again (S67 to S64). Steps S67 to S64 are repeated until the detected voltage is determined to be equal to or higher than the predetermined voltage.

  According to the fifth embodiment, when the voltage is reduced during the heat storage operation, the operation frequency of the compressor 3 is reduced, so that the operation stop is avoided and the heat storage operation according to the reduction of the operation frequency of the compressor 3 is performed. The target amount of heat can be stored by extending the time. Therefore, the heating operation using the hot water in the heat storage tank 15 becomes possible, which can contribute to the improvement of the heating capacity.

  In addition, it is limited about each change width in the reduction of the operating frequency of the compressor 3, the narrowing of the indoor flow rate adjusting valve 9, or the increase of the blowing amount of the outdoor fan 5A, etc., performed for suppressing the operating current of the refrigeration cycle apparatus. but it is not, but preferably the width can be controlled with as little number of adjustments.

Diagram showing a main configuration of a refrigeration cycle apparatus according to Embodiment 1-3 of the present invention. 3 is a flowchart showing operation control of the refrigeration cycle apparatus according to the first embodiment. 6 is a flowchart showing operation control of the refrigeration cycle apparatus according to the second embodiment. The figure showing the relationship between the compressor input current in the refrigeration cycle apparatus of FIG. 1, outdoor fan input current, and outdoor fan airflow. 10 is a flowchart showing operation control of the refrigeration cycle apparatus according to the third embodiment. Diagram showing a main configuration of a refrigeration cycle apparatus according to Embodiment 4-5 of the present invention. Compressor frequency in cold-storage operation, diagram representative of operation time and the relationship of the heat storage tank water temperature. 6 is a flowchart showing operation control of the refrigeration cycle apparatus according to the fourth embodiment. Diagram showing the compressor frequency, operating time and the relationship of the heat storage tank water temperature in the thermal storage operation. 10 is a flowchart showing operation control of the refrigeration cycle apparatus according to the fifth embodiment.

Explanation of symbols

1 outdoor unit, 2 indoor unit, 3 compressor, 4 four-way valve, 5 outdoor heat exchanger, 5A outdoor fan, 6 supercooling circuit flow rate adjustment valve, 7 supercooling circuit, 8 liquid side extension piping, 9 indoor flow rate adjustment valve DESCRIPTION OF SYMBOLS 10 Indoor heat exchanger, 11 Gas side extension piping, 12 Accumulator, 13 Outdoor control box, 13A Voltage detector, 14 Main power supply, 15 Heat storage tank, 16 Heat storage tank flow control valve, 17 Solenoid valve A, 18 Solenoid valve B, 19 Solenoid valve C, 20 Solenoid valve D, 21 Operation control unit.

Claims (5)

An outdoor unit having a compressor, a flow switching device and an outdoor heat exchanger, an indoor unit having an indoor heat exchanger and a flow rate adjusting valve for adjusting a flow rate of the indoor heat exchanger, and the outdoor heat exchanger A refrigeration cycle apparatus comprising: a fan that blows air, and a compressor, a flow path switching device, an outdoor heat exchanger, an indoor heat exchanger, and a flow rate adjustment valve connected by a refrigerant circuit,
A voltage detection device that repeatedly detects the operation voltage of the refrigeration cycle device at predetermined intervals;
And an operation control means that acts on the outdoor unit and the indoor unit to suppress an increase in the operating current of the refrigeration cycle device when the operating voltage detected by the voltage detection device decreases to a predetermined voltage value. ,
The operation control means is configured to reduce the operation frequency of the compressor and continue the operation when the operation voltage detected by the voltage detection device is lower than a predetermined voltage value. When the operation voltage detected by the voltage detector during operation in the operation mode is lower than a predetermined voltage value, the second operation mode to continue the operation by reducing the opening of the flow control valve; A third operation mode in which, when the operation voltage detected by the voltage detection device during the operation in the second operation mode is lower than a predetermined voltage value, the air volume of the fan is increased and the operation is continued. And a refrigeration cycle apparatus that repeats the first operation mode, the second operation mode, and the third operation mode in order . In a medium that stores a medium that exchanges heat with the refrigerant in the refrigerant circuit, and that has a heat storage tank that stores cold in the medium using the refrigerant circuit,
The refrigeration cycle apparatus according to claim 1, wherein the decrease in the operating voltage occurs during a cold storage operation for the medium. In a medium that stores a medium that exchanges heat with the refrigerant in the refrigerant circuit, and includes a heat storage tank that stores heat in the medium using the refrigerant circuit,
The refrigeration cycle apparatus according to claim 1, wherein the decrease in the operating voltage occurs during a heat storage operation for the medium.   The operation control means acts on the compressor to reduce the operation frequency and suppress the increase in current, and the cool storage time during the cool storage operation and the medium temperature in the heat storage tank corresponding to the cool storage time When the operation frequency of the compressor is reduced, the cool storage operation time is reset based on the reduced operation frequency and the data when the operation frequency of the compressor is reduced. The refrigeration cycle apparatus according to claim 2.   The operation control means acts on the compressor to reduce the operation frequency and suppress the current increase, and the heat storage time during the heat storage operation and the medium temperature in the heat storage tank corresponding to the heat storage time. When the operation frequency of the compressor is reduced, the heat storage operation time is reset based on the reduced operation frequency and the data when the operation frequency of the compressor is reduced. The refrigeration cycle apparatus according to claim 3.

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