JP2003161497A - Heat storage type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat storage type air conditioner, in which utilization time of cooling using storage heat is shortened, power consumption is reduced, and damage of a heat storage coil is prevented. <P>SOLUTION: The heat storage type air conditioner comprises: a heat storage circuit constituted by sequentially connecting a compressor 1, a nonuse side heat exchanger 3, a restriction apparatus 4, and the heat storage coil 5 disposed in a heat storage tank 7 that includes heat storage medium 6 to perform heat exchange with the heat storage medium 6 in the heat storage tank 7; an ambient air temperature sensor 13 detecting an ambient temperature; and a control means 14 controlling heat storage operation. The control means 14 stops the heat storage operation, when a heat storage operation time is equal to or more than a time obtained by correcting a required heat storage means set based on a heat storage use amount based on the ambient temperature detected by the ambient temperature detecting means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type air conditioner, and more particularly to a heat storage type air conditioner for performing proper heat storage.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 55-94661, a heat storage tank having a heat storage medium capable of storing heat is arranged in an air conditioner, and a heat storage coil for the heat storage tank is provided in the heat storage tank. By arranging a supercooling coil for collecting heat storage, and performing heat storage operation at night to store the heat storage in the heat storage tank, while improving the cooling efficiency by utilizing the cold heat in the daytime cooling operation, It is a well-known fact that the heat storage type air conditioner tries to reduce the power consumption.

[0003]

However, the heat storage amount stored in the heat storage operation of the conventional heat storage type air conditioner is as follows.
It varies depending on the outside air condition, the amount of refrigerant enclosed in the refrigerant circuit, and the amount of heat storage medium. In the conventional technology, there is no means for adjusting the heat storage amount depending on the outside air condition or the state of the amount of refrigerant enclosed in the refrigerant circuit, and the necessary heat storage operation time is determined from the detection result of the heat storage utilization amount during the day or the calculation result and the rated heat storage capacity. I was in control. Therefore, when the condensing temperature rises due to the rise of the outside air temperature or the excess of the refrigerant, the refrigerating capacity is lowered and the predetermined heat storage amount cannot be stored, so the heat storage utilization cooling time is shortened and the power consumption reduction effect is lowered. There was such a problem. Further, when the condensation temperature decreases due to the decrease in the outside air temperature, the heat storage amount becomes larger than the planned amount and the heat storage amount becomes larger than the planned value, and there is a problem that the ice making rate becomes large due to excessive ice making and the heat storage coil is damaged. Further, even when the heat storage operation is performed in a state where the amount of water is less than the regulation amount, there is a problem that the ice making rate is increased due to excessive ice making and the heat storage coil is damaged.

The present invention has been made to solve the above problems, and an object thereof is to store an appropriate amount of heat storage,
The purpose of the present invention is to shorten the heat storage use cooling time, reduce the power consumption reduction effect, and prevent damage to the heat storage coil.

[0005]

A heat storage type air conditioner according to the present invention is provided in a heat storage tank having a compressor, a non-use side heat exchanger, a throttle device and a heat storage medium, and the heat storage medium in the heat storage tank. A heat storage circuit that sequentially connects heat storage coils that perform heat exchange with the heat storage type air conditioner that performs cooling and heating operation using the heat storage stored in the heat storage tank, and an outside air temperature detection unit that detects the outside air temperature. And a control means for controlling the heat storage operation, wherein the control means corrects the heat storage operation time based on the outside air temperature detected by the outside air temperature detecting means for a necessary heat storage time determined based on the heat storage utilization amount. The heat storage operation is stopped when the time is over.

[0006] Further, for heat storage, a heat storage coil provided in a heat storage tank having a compressor, a non-use side heat exchanger, a throttling device, and a heat storage medium for sequentially exchanging heat with the heat storage medium in the heat storage tank is connected. In a heat storage type air conditioner that includes a circuit and performs cooling and heating operation using the heat storage stored in the heat storage tank, an outside air temperature detection unit that detects an outside air temperature, and a control unit that controls the heat storage operation, and the control The means obtains a predicted outside air temperature by predicting an outside air temperature at night from an average outside air temperature obtained by periodically measuring the outside air temperature during the day by the outside air temperature detection means, and a heat storage operation. The heat storage operation is stopped when the time becomes equal to or longer than the time when the required heat storage time determined based on the heat storage utilization amount is corrected based on the predicted outside air temperature.

Further, for heat storage, a heat storage coil provided in a heat storage tank having a compressor, a non-use side heat exchanger, an expansion device, and a heat storage medium for sequentially exchanging heat with the heat storage medium in the heat storage tank is connected. In a heat storage air conditioner that includes a circuit and performs cooling and heating operation using the heat stored in the heat storage tank, a condensation pressure sensor that detects the condensation pressure of the non-use side heat exchanger, and the evaporation of the use side heat exchanger Evaporation pressure sensor for detecting pressure, condensation temperature sensor for detecting pipe temperature at the outlet of the non-use side heat exchanger, evaporation temperature sensor for detecting suction pipe temperature of the compressor, and control for controlling heat storage operation Means for controlling the condensation pressure sensor,
The evaporation pressure sensor, the condensation temperature sensor, and the condensation pressure detected by the evaporation temperature sensor, the condensation pressure, the heat storage capacity calculated based on the condensation temperature and the evaporation temperature, and the cumulative heat amount calculated from the heat storage operation time are predetermined. The heat storage operation is stopped when the required heat storage amount is exceeded.

Further, the control device stops the heat storage operation when the evaporation temperature detected by the evaporation temperature sensor becomes equal to or lower than the predetermined evaporation temperature when the amount of heat storage is less than the predetermined required heat storage amount. .

When the compressor is an inverter control compressor and the calculated heat storage capacity is not equal to the planned heat storage capacity, the inverter frequency input to the compressor is set to a value that outputs the planned heat storage capacity. It is to reset.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a refrigerant circuit diagram of a heat storage type air conditioner showing a first embodiment of the present invention, and FIG. 2 is a control flowchart. In FIG.
The compressor 1, the four-way switching valve 2, the non-use side heat exchanger 3, the first expansion device 4, the heat storage coil 5, and the first opening / closing valve 8 are sequentially connected, and again through the four-way switching valve 2 again. A heat storage circuit that returns to the compressor is provided, 7 is a heat storage tank, and 6 is a heat storage medium that stores heat in the heat storage tank 7 by exchanging heat with the heat storage coil 5 and the heat storage coil 5.

Further, a branch is made between the non-use side heat exchanger 3 and the first expansion device 4, the second expansion device 10 and the usage side heat exchanger 11 are connected in sequence, and the first opening / closing valve is provided. The heat storage utilization circuit connected between 8 and the four-way switching valve 2 is provided. Furthermore, the third on-off valve 12 used when heat is stored bypasses between the second on-off valve 9 and the second expansion device 10 and is connected between the heat-storage coil 5 and the first on-off valve 8. It has a bypass circuit. Reference numeral 13 is an outside air temperature detecting means, and 14 is a control device for controlling the heat storage operation time by judging from the detected value of the outside air temperature detecting means 13.

Next, the basic operation of the heat storage type air conditioner will be described. Generally, during the heat storage operation in which heat is stored in the heat storage tank at night, the second opening / closing valve 9 and the third opening / closing valve 12
Is closed, the first on-off valve is opened, and the compressor 1 is operated, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 is
It flows into the non-use side heat exchanger 3 through the four-way switching valve 2, is cooled by air at normal temperature, and is condensed and liquefied. The refrigerant discharged from the non-use side heat exchanger 3 is decompressed by the first expansion device 4 because the second opening / closing valve 9 is closed. The depressurized refrigerant flows into the heat storage coil 5. While exchanging heat with the heat storage medium 6 in the heat storage coil 5, the refrigerant evaporates and gasifies and flows out, and since the third on-off valve 12 is closed, the compressor 1 via the first on-off valve 8 and the four-way switching valve 2. Inhaled into. In this way, the heat storage body 6 stores low-temperature heat by freezing or the like.

When the cooling operation utilizing heat storage is performed during the daytime, the second opening / closing valve 9 and the first opening / closing valve 8 are closed, the first opening / closing valve is opened, and the compressor 1 is operated. , Compressor 1
The high-temperature, high-pressure refrigerant gas discharged from the four-way switching valve 2
Through the non-use side heat exchanger 3 and is cooled by air at room temperature to be condensed and liquefied. The refrigerant discharged from the non-use side heat exchanger 3 flows into the heat storage coil 5 through the first expansion device 4 because the second opening / closing valve 9 is closed. The heat storage coil 5 exchanges heat with the heat storage medium 6 to supercool the refrigerant. Since the first on-off valve 8 is closed, the supercooled refrigerant goes to the third on-off valve 12 and is depressurized by the second expansion device 10. The depressurized refrigerant evaporates in the utilization side heat exchanger. At this time, the suction air is cooled. The evaporated refrigerant is sucked into the compressor 1 via the four-way switching valve 2.

Next, the control operation of the heat storage operation of the present invention will be described with reference to FIG. In step S1, the required heat storage time is determined based on the value obtained by dividing the heat storage use amount in the cooling operation by the heat storage capacity. For example, when the device characteristics have the same heat storage capacity and the same amount of heat storage used per hour, the required heat storage time = heat storage use time. In step S2, the outside air temperature sensor 1
3, the outside air temperature is detected, and the correction coefficient is determined based on the outside air temperature. FIG. 3 shows an example of the relationship between the outside air temperature and the correction coefficient. The outside air temperature and the correction coefficient change depending on the device characteristics. In step S3, the heat storage operation is started,
In step, the heat storage operation is ended when the operation time ≧ the required heat storage time × the correction coefficient is reached.

As described above, by performing the heat storage operation by appropriately correcting the required heat storage time according to the outside air temperature, it is possible to store a predetermined amount of heat storage. It is possible to prevent the reduction effect of

In the present embodiment, the outside air temperature detected in step S2 is detected at the start of the heat storage operation (predetermined time) and is not the outside air temperature during the heat storage operation. Alternatively, for example, sampling may be performed at 1-hour intervals, the average outside air temperature during the day may be detected, and the outside air temperature at night may be predicted and determined from the temperature difference between the past average day and night. In this case, more accurate correction can be performed by predicting the outside air temperature from the average temperature difference.

Embodiment 2. FIG. 4 is a refrigerant circuit diagram of a heat storage type air conditioner showing Embodiment 2 of the present invention, and FIG. 5 is a control flowchart. 4, the same parts as those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and the refrigerant circuit operation during the combined cooling operation is the same as that of the first embodiment, and therefore the description thereof is omitted. 15 is a condensing pressure sensor for detecting the condensing pressure, 16 is an evaporating pressure sensor for detecting the evaporating pressure, 17 is an evaporating temperature sensor for detecting the suction pipe temperature of the compressor, 18 is a condensing for detecting the pipe temperature at the outlet of the condenser. It is a temperature sensor. The condensation temperature and the evaporation temperature may be detected by using temperature sensors for the condenser and evaporator piping temperatures, respectively.

Next, the control operation of the present invention will be described with reference to FIG. In step S1, the required heat storage amount is determined from the heat storage use amount in the cooling operation. For example, when the device characteristics are the same in the heat storage capacity and the heat storage usage amount per hour, the necessary heat storage amount = heat storage usage amount. The heat storage operation is started in step S2, and the heat storage capacity is calculated from the refrigerant state in step S3.

This calculation is performed as follows. First, the condensation temperature is calculated by converting the saturation temperature from the value detected by the condensation pressure sensor 15, and the evaporation temperature is calculated by converting the saturation temperature from the value detected by the evaporation pressure sensor 16. Further, the refrigerant superheat is obtained from the evaporation temperature obtained as described above and the detection temperature of the evaporation temperature sensor 17, and the refrigerant subcool is obtained from the condensation temperature obtained as described above and the detection temperature of the condensation temperature sensor 18. Then, the heat storage capacity is calculated based on the condensation temperature, the evaporation temperature, the refrigerant superheat, and the refrigerant subcool obtained as described above. That is, the heat storage capacity is calculated based on the condensing pressure, the condensing pressure, the condensing temperature, and the evaporating temperature detected by the condensing pressure sensor 15, the evaporating pressure sensor 16, the condensing temperature sensor 18, and the evaporating temperature sensor 17, respectively.

Next, in step S4, the integrated heat storage amount is calculated from the heat storage capacity calculated in step S3 and the operating time, and the heat storage operation is terminated when the integrated heat storage amount reaches or exceeds the required heat storage amount (step S5). .

As described above, by detecting the condensing temperature, the evaporating temperature, the refrigerant subcool, and the refrigerant superheat, and controlling the heat storage operation, the predetermined heat storage amount can be accurately and accurately irrespective of the outside air temperature and the refrigerant amount. Can be stored. For this reason, it is possible to prevent reduction of the heat storage utilization cooling utilization time and reduction of the power consumption reduction effect.

Embodiment 3. In the present embodiment, like the heat storage operation of the second embodiment, the heat storage operation is terminated when the accumulated heat storage amount reaches the preset evaporation temperature or lower even if it does not reach the required heat storage amount. FIG. 6 is a control flowchart of the heat storage type air conditioner showing the third embodiment of the present invention. Since the refrigerant circuit diagram of the heat storage type air conditioner and the refrigerant circuit operation during the combined cooling operation are the same as those in the first embodiment, description thereof will be omitted, and the control operation will be described with reference to the control flowchart of FIG. 6.

Since steps S1 to S4 are the same as those in the second embodiment, the description thereof will be omitted. In step S5, when the integrated heat storage amount does not reach the required heat storage amount, the process proceeds to step S6, and in step S6, the evaporation temperature set to the evaporation temperature at the time when the target heat storage amount is stored in advance (for example, -17).
When it reaches less than (° C), the heat storage operation is terminated. Further, the heat storage operation is terminated when the integrated heat storage amount reaches or exceeds the required heat storage amount in step S5. This utilizes the characteristic that when the amount of stored heat increases, the rate of ice making in the heat storage tank increases and the thermal resistance increases, so the evaporation temperature decreases.

As described above, even if the accumulated heat storage amount does not reach the required heat storage amount, the heat storage operation is terminated when the temperature reaches the preset evaporation temperature or lower, and damage to the heat storage coil due to excessive ice making. Etc. can be prevented.

Fourth Embodiment 7 is a control flowchart of the heat storage type air conditioner showing Embodiment 4 of the present invention. The refrigerant circuit of the heat storage type air conditioner is the first embodiment.
In FIG. 1, the compressor 1 is an inverter control compressor, and the controller 14 is provided with an inverter control unit. The refrigerant circuit operation during the combined cooling operation is the same as that of the first embodiment. Therefore, the description will be omitted, and the control operation will be described with reference to the control flowchart of FIG. 7.

In step S1, the required heat storage amount is determined from the heat storage utilization amount in the cooling operation. In step S2, the inverter control starts the heat storage operation at the initial frequency, and in step S3
The heat storage capacity is calculated from the refrigerant state. Next, in step S4, the integrated heat storage amount is calculated based on the heat storage capacity calculated in step S3 and the operating time, and the process proceeds to step S5. In step S5, the planned planned heat storage capacity is compared with the current heat storage capacity, and it is confirmed that the planned capacity is output. If the planned capacity is not output, the process proceeds to step S6, and in step S6, the initial inverter frequency set in step S2 is reset to a value that outputs the planned capacity. If the current capacity is larger than the planned capacity, the frequency is small. Conversely, if the current capacity is smaller, the frequency is larger and the frequency is reset. If the capacity as planned is output in step S5, the process proceeds to step S7, and if the accumulated heat storage amount reaches the required heat storage amount, the heat storage operation ends.

As described above, by controlling the compressor 1 by the inverter, it is possible to store the planned amount of cold storage within a predetermined time. Therefore, it is possible to prevent a reduction in the heat storage utilization cooling use time and a reduction in the power consumption reduction effect.

[0028]

As described above, according to the present invention, the heat storage type air conditioner according to the present invention is provided in the heat storage tank having the compressor, the non-use side heat exchanger, the expansion device and the heat storage medium. In a heat storage type air conditioner that includes a heat storage circuit in which heat storage coils that sequentially exchange heat with a heat storage medium in the heat storage tank are sequentially connected, and that uses the heat storage stored in the heat storage tank to perform cooling and heating operation, the outside air temperature is changed. An outside air temperature detection means for detecting, and a control means for controlling the heat storage operation, the control means,
When the heat storage operation time is equal to or longer than the time when the required heat storage time determined based on the heat storage utilization amount is corrected based on the outside air temperature detected by the outside air temperature detection means, the heat storage operation is stopped, so there is an excess or deficiency. It is possible to store a predetermined amount of heat storage without using the heat storage device, and it is possible to shorten the heat storage utilization cooling use time and the power consumption.

In addition, for heat storage, a heat storage coil provided in a heat storage tank having a compressor, a non-use side heat exchanger, an expansion device, and a heat storage medium for sequentially exchanging heat with the heat storage medium in the heat storage tank is connected. In a heat storage type air conditioner that includes a circuit and performs cooling and heating operation using the heat storage stored in the heat storage tank, an outside air temperature detection unit that detects an outside air temperature, and a control unit that controls the heat storage operation, and the control The means obtains a predicted outside air temperature by predicting an outside air temperature at night from an average outside air temperature obtained by periodically measuring the outside air temperature during the day by the outside air temperature detection means, and a heat storage operation. When the time is equal to or longer than the time required to correct the required heat storage time determined based on the heat storage utilization amount based on the predicted outside air temperature, the heat storage operation is stopped, so that the predetermined heat storage amount can be more accurately provided without excess or deficiency. store Door can be, shortening of the heat storage use air conditioning use time, it is possible to better the reduction of power consumption.

Further, for heat storage, a heat storage coil provided in a heat storage tank having a compressor, a non-use side heat exchanger, an expansion device, and a heat storage medium for sequentially exchanging heat with the heat storage medium in the heat storage tank is connected. In a heat storage air conditioner that includes a circuit and performs cooling and heating operation using the heat stored in the heat storage tank, a condensation pressure sensor that detects the condensation pressure of the non-use side heat exchanger, and the evaporation of the use side heat exchanger Evaporation pressure sensor for detecting pressure, condensation temperature sensor for detecting pipe temperature at the outlet of the non-use side heat exchanger, evaporation temperature sensor for detecting suction pipe temperature of the compressor, and control for controlling heat storage operation Means for controlling the condensation pressure sensor,
The evaporation pressure sensor, the condensation temperature sensor, and the condensation pressure detected by the evaporation temperature sensor, the condensation pressure, the heat storage capacity calculated based on the condensation temperature and the evaporation temperature, and the cumulative heat amount calculated from the heat storage operation time are predetermined. When the heat storage amount exceeds the required heat storage amount, the heat storage operation is stopped, so it is possible to store a predetermined heat storage amount accurately without excess or deficiency regardless of the outside air temperature and refrigerant amount, and shorten the heat storage utilization cooling utilization time. In addition, power consumption can be reduced.

Further, since the control device stops the heat storage operation when the evaporation temperature detected by the evaporation temperature sensor becomes equal to or lower than the predetermined evaporation temperature when the heat storage amount is less than the predetermined required heat storage amount, Even if the heat storage amount does not reach the required heat storage amount, the heat storage operation is terminated when it reaches the preset evaporation temperature or less, and damage to the heat storage coil due to excessive ice making can be prevented.

When the compressor is an inverter control compressor and the calculated heat storage capacity is not equal to the planned heat storage capacity, the inverter frequency input to the compressor is set to a value for outputting the planned heat storage capacity. I will reset it, so
It is possible to store a predetermined amount of cold storage within a predetermined time, and it is possible to shorten the heat storage utilization cooling utilization time and the power consumption.

[Brief description of drawings]

FIG. 1 is a refrigerant circuit diagram of a heat storage type air conditioner showing a first embodiment of the present invention.

FIG. 2 is a control operation flowchart of the heat storage type air conditioner showing the first embodiment of the present invention.

FIG. 3 is a diagram showing a relationship between an outside air temperature and a correction coefficient of the heat storage type air conditioner showing the first embodiment of the present invention.

FIG. 4 is a refrigerant circuit diagram of a heat storage type air conditioner showing a second embodiment of the present invention.

FIG. 5 is a control operation flowchart of the heat storage type air conditioner showing the second embodiment of the present invention.

FIG. 6 is a control operation flowchart of the heat storage type air conditioner showing the third embodiment of the present invention.

FIG. 7 is a control operation flowchart of the heat storage type air conditioner showing the fourth embodiment of the present invention.

[Explanation of symbols]

1 compressor, 2 4-way switching valve, 3 non-use heat exchanger, 4
First expansion device, 5 heat storage coil, 6 heat storage medium, 7
Heat storage tank, 8 first opening / closing valve, 9 second opening / closing valve, 10
2nd expansion device, 11 utilization side heat exchanger, 12 3rd
Open / close valve, 13 outside air temperature sensor, 14 control device,
15 condensation pressure sensor, 16 evaporation pressure sensor, 1
7 Evaporation temperature sensor, 18 Condensation temperature sensor.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F25B 13/00 351 F25B 13/00 351 F term (reference) 3L060 AA03 CC03 CC04 CC16 EE04 EE41 3L092 TA02 UA04 UA31 UA33 VA06 XA02 XA06 XA12 XA16 XA23 XA33 XA40 YA01

Claims (5)

[Claims] 1. A heat storage coil, which is provided in a heat storage tank having a compressor, a non-use side heat exchanger, an expansion device, and a heat storage medium, and which is sequentially connected to a heat storage coil for exchanging heat with the heat storage medium in the heat storage tank. A heat storage type air conditioner that includes a circuit and performs cooling and heating operation using the heat storage stored in the heat storage tank, includes an outside air temperature detection unit that detects an outside air temperature, and a control unit that controls the heat storage operation. The means stops the heat storage operation when the heat storage operation time is equal to or longer than the time when the required heat storage time determined based on the heat storage utilization amount is corrected based on the outside air temperature detected by the outside air temperature detection means. Heat storage type air conditioner characterized by. 2. A heat storage coil, which is provided in a heat storage tank having a compressor, a non-use side heat exchanger, an expansion device, and a heat storage medium, and which is sequentially connected to a heat storage coil for exchanging heat with the heat storage medium in the heat storage tank. A heat storage type air conditioner that includes a circuit and performs cooling and heating operation using the heat storage stored in the heat storage tank, includes an outside air temperature detection unit that detects an outside air temperature, and a control unit that controls the heat storage operation. The means obtains a predicted outside air temperature by predicting an outside air temperature at night from an average outside air temperature obtained by periodically measuring the outside air temperature during the day by the outside air temperature detecting means, and a heat storage operation. A heat storage type air conditioner characterized by stopping the heat storage operation when a time becomes equal to or longer than a time required to correct the required heat storage time determined based on the heat storage utilization amount based on the predicted outside air temperature. 3. A heat storage coil, which is provided in a heat storage tank having a compressor, a non-use side heat exchanger, an expansion device, and a heat storage medium, and which is sequentially connected to a heat storage coil for exchanging heat with the heat storage medium in the heat storage tank. In a heat storage type air conditioner that includes a circuit and performs cooling and heating operation using the heat stored in the heat storage tank, a condensation pressure sensor that detects the condensation pressure of the non-use side heat exchanger, and a vaporization of the use side heat exchanger. Evaporation pressure sensor for detecting pressure, condensation temperature sensor for detecting pipe temperature at the outlet of the non-use side heat exchanger, evaporation temperature sensor for detecting suction pipe temperature of the compressor, control for controlling heat storage operation Means, the condensing pressure sensor, the evaporation pressure sensor, the condensing pressure detected by the condensing temperature sensor and the evaporation temperature sensor, the condensing pressure, the condensing temperature and A heat storage type air conditioner characterized in that the heat storage operation is stopped when the integrated heat quantity calculated from the heat storage capacity calculated based on the evaporation temperature and the heat storage operation time exceeds a predetermined required heat storage quantity. 4. The control device stops the heat storage operation when the evaporation temperature detected by the evaporation temperature sensor is equal to or lower than a predetermined evaporation temperature when the amount of heat storage is less than a predetermined required heat storage amount. The heat storage type air conditioner according to claim 3. 5. When the compressor is an inverter control compressor, and the calculated heat storage capacity is not equal to the planned heat storage capacity, the inverter frequency input to the compressor is set to a value that outputs the planned planned heat storage capacity. The heat storage air conditioner according to claim 3 or 4, wherein the heat storage air conditioner is reset.