JP2022036665A - Air conditioner and air conditioning system - Google Patents

Abstract

To provide an air conditioner capable of improving power-saving effect in air-conditioning a room in the nighttime when a solar power generation device does not generate power.SOLUTION: An air conditioner includes an air conditioning unit 27 for air-conditioning a room 105 as an air-conditioning target by cooling or heating, and a control unit for controlling operation of the air conditioning unit 27 so that the room 105 is at a target temperature, and the air conditioner can be operated by power generated by a solar power generation device. The control unit allows the air conditioning unit 27 to execute indirect air-conditioning operation for directing wind to a structure constituting a space of the room 105 when a power generation amount index which is an index indicating a power generation amount by the solar power generation device is larger than a predetermined reference value.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to an air-conditioning device and an air-conditioning system capable of performing indoor air-conditioning using the electric power generated by the photovoltaic power generation device.

In an air conditioner that can be operated using the power generated by the photovoltaic power generation device and the power from an external power source, the power generated by the photovoltaic power generation device is used as much as possible when the photovoltaic power generation device is generating power. Technology has been proposed. Patent Document 1 describes a photovoltaic power generation device, a power generation amount detecting means for detecting the amount of power generated by the photovoltaic power generation device, and a control temperature for air conditioning set inside the air conditioning device in order to set a target space as a target temperature. Based on this, an air conditioner for air-conditioning the target space and an air conditioner including the air conditioner are disclosed. The air-conditioning equipment described in Patent Document 1 adjusts the cooling capacity of the air-conditioning equipment to a high level when the power generation amount of the photovoltaic power generation device detected by the power generation amount detecting means is large, and adjusts the cooling capacity to a high level when the power generation amount is small. It is equipped with an adjustment means for adjusting it to a lower level. Then, the adjusting means determines the amount of deviation between the reference power generation amount and the power generation amount detected by the power generation amount detection means when the power generation amount of the photovoltaic power generation device detected by the power generation amount detection means is equal to or more than the reference power generation amount. The control temperature for air conditioning is set to the low temperature side in proportion.

Japanese Patent No. 6071474

However, in the air-conditioning equipment described in Patent Document 1, when the power generation amount of the photovoltaic power generation device is large, the air-conditioning control temperature is set to the low temperature side to increase the air volume from the air-conditioning device or output colder air. It only causes the operation to be executed. In other words, when the amount of power generated by the photovoltaic power generation device is large, the main focus is on using the power generated by the photovoltaic power generation device, including the time when the photovoltaic power generation device does not generate power. No disclosure is made regarding the cooling method of the target space in consideration of power saving. Therefore, the air conditioner described in Patent Document 1 has a problem that the power saving effect when cooling the target space at night when the photovoltaic power generation device does not generate power is low. Further, in Patent Document 1, cooling is targeted, but the same applies to heating.

The present disclosure has been made in view of the above, and an object thereof is to obtain an air conditioner capable of enhancing the power saving effect when air conditioning the room at night when the photovoltaic power generation device does not generate power. do.

In order to solve the above-mentioned problems and achieve the object, the air conditioner of the present disclosure includes an air conditioner that air-conditions the room to be air-conditioned by cooling or heating, and an operation of the air conditioner so that the room reaches the target temperature. It is equipped with a control unit that controls the air conditioner, and can be operated by the power generated by the solar power generation device. The control unit air-conditions the indirect air-conditioning operation that directs the wind direction to the structure that constitutes the indoor space when the power generation amount index, which is an index indicating the power generation amount of the photovoltaic power generation device, is larger than the predetermined reference value. Let the department do it.

According to the present disclosure, there is an effect that the power saving effect when air-conditioning the room at night when the photovoltaic power generation device does not generate power can be enhanced as compared with the conventional case.

A block diagram schematically showing an example of the configuration of the air conditioning system according to the first embodiment. Cross-sectional view schematically showing an example of a building in which an air conditioning system according to the first embodiment is installed. A block diagram schematically showing an example of the functional configuration of the remote controller provided in the air conditioning system according to the first embodiment. A diagram schematically showing an example of changes in the amount of power generated by a photovoltaic power generation device in one day. A flowchart showing an example of the procedure of the air conditioning control method in the remote controller of the air conditioning system according to the first embodiment. A flowchart showing an example of the procedure of the ventilation control method in the remote controller of the air conditioning system according to the first embodiment. The figure for demonstrating an example of the calculation method of the standard power generation amount by Embodiment 2. The figure for demonstrating an example of the calculation method of the standard power generation amount by Embodiment 3. The figure which shows an example of the transition of the power generation amount of the photovoltaic power generation apparatus by Embodiment 4. The figure for demonstrating an example of the calculation method of the power generation amount of the photovoltaic power generation apparatus according to Embodiment 4. A block diagram schematically showing an example of the configuration of the air conditioning system according to the fifth embodiment. A block diagram schematically showing another example of the configuration of the air conditioning system according to the fifth embodiment. A block diagram schematically showing an example of the configuration of the air conditioning system according to the sixth embodiment. A diagram showing an example of changes in the amount of power generation when output control is performed. The figure which shows typically an example of the hardware configuration which realizes the remote controller by Embodiments 1 to 6.

Hereinafter, the air conditioner and the air conditioner system according to the embodiment of the present disclosure will be described in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a block diagram schematically showing an example of the configuration of the air conditioning system according to the first embodiment. FIG. 2 is a cross-sectional view schematically showing an example of a building in which the air conditioning system according to the first embodiment is installed. The air conditioning system 1 is installed in a building 100 such as a house, a condominium, an apartment, a building, a school, a hospital, or an underground mall.

The air conditioning system 1 includes a photovoltaic power generation device 10 that generates electricity using a solar cell 11. The photovoltaic power generation device 10 is a solar cell 11 that converts sunlight into DC power, a load in a building 100 in which the air conditioning system 1 is provided by converting the DC power generated by the solar cell 11 into AC power, and electric power. It has a power conditioner 12 that outputs to the system 25. As shown in FIG. 2, the solar cell 11 is provided on the roof 101 of the building 100, and the power conditioner 12 is provided on the outer wall 102 of the building 100. The solar cell 11 and the power conditioner 12 are connected via wiring. The power conditioner 12 can measure the amount of power generated by the solar cell 11.

Returning to FIG. 1, the air conditioning system 1 measures the distribution board 22 that distributes the electric power, the electric energy meter 23 for purchasing the electric power that measures the amount of electric power purchased from the electric power company, and the electric energy that is sold to the electric power company. It is equipped with a power meter 24 for selling power. The distribution board 22 is electrically connected to the power system 25. A power meter 23 for purchasing power and a power meter 24 for selling power are provided between the distribution board 22 and the power system 25.

The air conditioning system 1 includes a ventilation unit 26 such as a ventilation fan that ventilates the room 105 in the building 100, an air conditioning unit 27 as a cooling / heating device that heats or cools the air supplied to the room 105, and a CO ₂ concentration in the room 105. The CO ₂ sensor 28 for detecting the above is provided. As shown in FIG. 2, the ventilation unit 26 is provided on the outer wall 102 of the building 100 that separates the indoor 105 from the outdoor, for example. In one example, the air-conditioning unit 27 is inserted into an opening provided in the ceiling surface 103 and is provided behind the ceiling. The CO ₂ sensor 28 is, for example, provided on the wall surface 102a of the room 105. The CO ₂ sensor 28 is an example of an air quality sensor.

Returning to FIG. 1, the air conditioning system 1 includes a remote controller 30 that communicates with the power conditioner 12, the ventilation unit 26, the air conditioning unit 27, and the CO ₂ sensor 28, and controls the operation of the ventilation unit 26 and the air conditioning unit 27. .. As shown in FIG. 2, the remote controller 30 is provided on the wall surface 102a of the room 105 in one example.

FIG. 3 is a block diagram schematically showing an example of the functional configuration of the remote controller provided in the air conditioning system according to the first embodiment. The remote controller 30 includes a setting information storage unit 31, a power generation amount acquisition unit 32, a time acquisition unit 33, a reference power generation amount storage unit 34, a power generation amount comparison unit 35, an air conditioning control unit 36, and a concentration acquisition unit 37. And a ventilation control unit 38. The remote controller 30 is an example of a control unit.

The setting information storage unit 31 stores setting information which is a setting content for the operation of the air conditioning unit 27 and the ventilation unit 26. The setting information is set by an operator existing in the room 105 via an operation unit (not shown). An example of the setting information includes a wind speed, a wind direction, an operation mode and a target temperature indicating a cooling operation or a heating operation in the air conditioning unit 27, and a ventilation air volume in the ventilation unit 26. The wind speed is the strength of the wind blown from the air conditioning unit 27, but may be the air volume instead of the wind speed or in addition to the wind speed. The target temperature is, in one example, the temperature of the room 105 specified by the operator. The operation mode indicates the type of operation state.

The power generation amount acquisition unit 32 acquires the power generation amount generated by the solar cell 11 from the power conditioner 12. In the following, the amount of power generation acquired by the power generation amount acquisition unit 32 may be simply referred to as the amount of power generation.

The time acquisition unit 33 acquires the time when the power generation amount acquisition unit 32 acquires the power generation amount from the power conditioner 12. In one example, the time acquisition unit 33 acquires the time from the clock built in the remote controller 30.

The reference power generation amount storage unit 34 stores the reference power generation amount, which is the power generation amount generated by the photovoltaic power generation device 10 in the reference weather. The standard power generation amount is a function of time. In one example, the reference power generation amount is a reference value for determining whether to use the power generation amount generated by the photovoltaic power generation device 10 for the indirect air conditioning operation described later.

The power generation amount comparison unit 35 determines whether the difference between the power generation amount acquired by the power generation amount acquisition unit 32 and the reference power generation amount acquired from the reference power generation amount storage unit 34 is positive, and the determination result is controlled by air conditioning. It outputs to the unit 36 and the ventilation control unit 38. The power generation amount comparison unit 35 makes a comparison using the reference power generation amount at the time when the power generation amount is acquired by the power generation amount acquisition unit 32. Here, the power generation amount is an example of a power generation amount index which is an index indicating the power generation amount in the photovoltaic power generation device 10.

When the air conditioning control unit 36 receives a determination result from the power generation amount comparison unit 35 that the power generation amount is smaller than the reference power generation amount while the air conditioning unit 27 is operating, the setting stored in the setting information storage unit 31 is set. The operation of the air conditioning unit 27 is controlled based on the information. In one example, the air conditioning control unit 36 is controlled indoors by control such as PI (Proportional-Integral) control based on the deviation between the target temperature and the temperature of the room 105 at the specified wind speed and direction in the specified operation mode. The temperature of 105 is controlled to be the target temperature. The operation based on the setting information is hereinafter referred to as normal operation.

When the air conditioning control unit 36 receives a determination result from the power generation amount comparison unit 35 that the power generation amount is larger than the standard power generation amount, the space to be air-conditioned even if the temperature outside the building 100 changes. The air-conditioning unit 27 is controlled so that the temperature of the room 105 is maintained in an environment where people feel comfortable. Further, the air conditioning control unit 36 controls the operation of the air conditioning unit 27 so that energy consumption can be saved as compared with the conventional case when the indoor 105 is air-conditioned at night when the photovoltaic power generation device 10 does not generate power. .. In this specification, energy consumption is saved as compared with the conventional one so as to maintain an environment in which the temperature of the room 105 feels comfortable for humans, and to maintain an environment in which the solar power generation device 10 does not generate power throughout the day including nighttime. The operation of the air conditioning unit 27 as described above is referred to as indirect air conditioning operation.

In the indirect air conditioning operation according to the first embodiment, the wind direction is directed to the structure constituting the space of the room 105 according to the operation mode of the air conditioning unit 27, that is, the type of the operating state. That is, in the indirect air-conditioning operation, the air-conditioning unit 27 is operated so that the indoor 105 is less likely to be heated during cooling and the indoor 105 is less likely to be cooled during heating by using the amount of power generated by the photovoltaic power generation device 10. Be controlled. In the case of FIG. 2, an example of the structure constituting the space of the room 105 is the wall surface 102a, the ceiling surface 103, and the floor surface 104 of the room 105.

Specifically, when the operation mode is cooling operation, the air conditioning unit 27 increases the wind speed higher than the wind speed set in the setting information so that the wind direction faces the wall surface 102a or the ceiling surface 103 of the room 105. Set to and lower the target temperature. When the wind direction is automatically set in the setting information, the wind direction in the indirect air conditioning operation is set to the wall surface 102a or the ceiling surface 103. When the wind direction is set in a certain direction instead of automatic in the setting information, an example of the wind direction in the indirect air conditioning operation is between the wall surface 102a and the setting direction, or between the ceiling surface 103 and the setting direction. , Swing. As a result, when the temperature of the room 105 has already reached the target temperature by the air conditioning unit 27 and the operation mode is the cooling operation, the temperature is lower than the target temperature and the wind speed exceeds the wind speed of the setting information. It is possible to prevent the wind from hitting a person existing in the room 105.

When the operation mode is the heating operation, the air-conditioning unit 27 sets the wind speed higher than the wind speed set in the setting information and sets the wind direction toward the wall surface 102a or the floor surface 104 of the indoor 105, and sets the target. Raise the temperature. When the wind direction is automatically set in the setting information, the wind direction in the indirect air conditioning operation is set to the wall surface 102a or the floor surface 104. When the wind direction is set in a certain direction instead of automatic in the setting information, an example of the wind direction in the indirect air conditioning operation is between the wall surface 102a and the setting direction, or between the floor surface 104 and the setting direction. , Swing.

When the operation mode is the cooling operation, by executing the indirect air conditioning operation, the wind speed increases and the wind whose temperature is lower than the target temperature hits the wall surface 102a or the ceiling surface 103. Normally, the temperature outside the building 100 is transmitted to the room 105 via the wall surface 102a. Also, in the summer, the warmed air rises. Therefore, by allowing the wind to hit the wall surface 102a or the ceiling surface 103, it is possible to make it difficult for the structure constituting the space of the room 105 to warm up. In particular, by sufficiently cooling the structure that constitutes the space of the indoor 105 using the electric power generated by the photovoltaic power generation device 10, the structure that constitutes the space of the indoor 105 at night when the photovoltaic power generation device 10 does not generate power. The rise in body temperature is suppressed, and the rise in air temperature in the room 105 is also suppressed. The power consumption when the indoor 105 containing such air is cooled at night is suppressed as compared with the case where the indirect air conditioning operation according to the first embodiment is not performed. Further, since the wind having a temperature lower than the target temperature is used to lower the temperature of the wall surface 102a or the ceiling surface 103, the temperature of the room 105 is higher than the target temperature even if the target temperature is lowered. It does not drop excessively.

When the operation mode is the heating operation, by executing the indirect air conditioning operation, the wind speed rises, and the wind whose temperature rises above the target temperature hits the wall surface 102a or the floor surface 104. Normally, the temperature outside the building 100 is transmitted to the room 105 via the wall surface 102a. Also, in winter, the cooled air descends. Therefore, by allowing the wind to hit the wall surface 102a or the floor surface 104, it is possible to make it difficult for the structure constituting the space of the room 105 to be cooled. In particular, by sufficiently warming the structure constituting the space of the indoor 105 using the electric power generated by the photovoltaic power generation device 10, the structure constituting the space of the indoor 105 at night when the photovoltaic power generation device 10 does not generate power. The decrease in the temperature of the air in the room 105 is suppressed, and the decrease in the temperature of the air in the room 105 is also suppressed. The power consumption when the room 105 containing such air is heated at night is suppressed as compared with the case where the indirect air conditioning operation according to the first embodiment is not performed. Further, since the wind having a temperature higher than the target temperature is used to raise the temperature of the wall surface 102a or the floor surface 104, even if the target temperature is raised, the temperature of the room 105 is higher than the target temperature. It does not rise excessively.

When the operation mode is cooling operation, the wind direction is directed to the wall surface 102a or the ceiling surface 103, so that the cold wind having a temperature lower than the target temperature and an increased wind speed is prevented from directly hitting a person existing in the room 105. be able to. When the operation mode is heating operation, by directing the wind direction to the wall surface 102a, it is possible to prevent the warm wind that rises above the target temperature and has an increased wind speed from directly hitting the person existing in the room 105. .. That is, by performing such wind direction control during the indirect air conditioning operation, it is possible to prevent the person existing in the room 105 from being excessively cooled or warmed.

In the indirect air conditioning operation, the degree of increasing the wind speed may be changed or the range of change in the target temperature may be changed according to the size of the difference between the power generation amount and the reference power generation amount. In one example, the larger the difference between the power generation amount and the standard power generation amount, the larger the degree of increase in the wind speed, the wider the range of change in the target temperature, and the smaller the difference between the power generation amount and the standard power generation amount, the higher the wind speed. It is possible to reduce the degree of power generation and reduce the range of change in the target temperature.

The air conditioning control unit 36 continues the indirect air conditioning operation when it receives a determination result that the power generation amount is larger than the reference power generation amount during the indirect air conditioning operation. Further, when the air conditioning control unit 36 receives a determination result that the power generation amount is smaller than the reference power generation amount during the indirect air conditioning operation, the air conditioning control unit 36 stops the indirect air conditioning operation and returns to the normal operation based on the setting information. That is, the wind speed, the wind direction, and the target temperature are returned to the contents set in the setting information. When the power generation amount is equal to the reference power generation amount, the operation may be performed based on the setting information, or the indirect air conditioning operation may be performed.

The concentration acquisition unit 37 acquires the CO ₂ concentration in the room 105 from the CO ₂ sensor 28.

The ventilation control unit 38 controls the ventilation unit 26 to operate according to the ventilation air volume set in the setting information. When the CO ₂ concentration acquired from the concentration acquisition unit 37 is smaller than the reference value at which the CO ₂ emission operation is executed, the ventilation control unit 38 operates the ventilation unit 26 with the ventilation air volume set in the setting information. Perform normal operation. When the CO ₂ concentration is higher than the reference value, the ventilation control unit 38 performs a CO ₂ emission operation. The CO ₂ emission operation is an operation in which the air in the room 105 is quickly ventilated so that the CO ₂ concentration in the room 105 becomes smaller than the reference value, and a predetermined ventilation air volume is set.

When the ventilation control unit 38 receives a determination result from the power generation amount comparison unit 35 that the power generation amount is larger than the standard power generation amount during the CO ₂ emission operation, the ventilation control unit 38 increases the air volume more than the set air volume during the CO ₂ emission operation. The operation of the ventilation unit 26 is controlled so as to cause the ventilation unit 26 to operate. When the ventilation control unit 38 receives a determination result that the power generation amount is smaller than the reference power generation amount during the CO ₂ emission operation, the ventilation control unit 38 operates the ventilation unit 26 with the set air volume at the CO ₂ emission operation. Further, when the ventilation control unit 38 receives a determination result that the power generation amount is smaller than the standard power generation amount when the air volume is increased more than the set air volume in the CO ₂ emission operation during the CO ₂ emission operation. , The ventilation unit 26 is operated so as to return to the set air volume of the CO ₂ emission operation.

In the above description, when the CO ₂ concentration is equal to the reference value, it may be included when the CO ₂ concentration is larger than the reference value, or it may be included when the CO ₂ concentration is smaller than the reference value. .. If the amount of power generated during CO ₂ emission operation is equal to the standard amount of power generation, it may be included when the amount of power generation is larger than the standard amount of power generation, or included when the amount of power generation is smaller than the standard amount of power generation. May be good.

Further, in the example of FIG. 3, the remote controller 30 shows a configuration in which the air conditioning unit 27 and the ventilation unit 26 are controlled, but if the configuration is such that various information can be aggregated and the control operation can be instructed. For example, the air conditioning unit 27 or the ventilation unit 26 may be configured to include a control unit having each function processing unit of the remote controller 30 shown in FIG. Further, the air-conditioning unit 27 and the remote controller 30 form an air-conditioning device, and the ventilation unit 26 and the remote controller 30 form a ventilation device.

Next, the operation of the air conditioning system 1 will be described. FIG. 4 is a diagram schematically showing an example of a change in the amount of power generated by a photovoltaic power generation device in one day. In FIG. 4, the horizontal axis shows the time in one day, and the vertical axis shows the amount of power generated by the photovoltaic power generation device 10. FIG. 4 shows a graph A0 of the standard power generation amount, a graph A1 of the power generation amount by the photovoltaic power generation device 10 in fine weather, a graph A2 of the power generation amount by the photovoltaic power generation device 10 in cloudy weather, and a case of fine weather after cloudy weather. Graph A3 of the amount of power generated by the photovoltaic power generation device 10 of the above is shown.

As shown in the graph A1, the amount of power generation is large because the amount of solar radiation is large in the case of fine weather with respect to the graph A0 of the standard power generation amount. In such fine weather, the temperature is expected to rise. Therefore, by cooling the space of the room 105 in advance by the air conditioning unit 27 in the summer, the temperature of the room 105 can be kept comfortable. In such a case, as shown by the arrow WD in FIG. 2, an indirect air conditioning operation is performed in which the wind direction is controlled so that the wind direction of the air conditioning unit 27 faces the ceiling surface 103 or the wall surface 102a. As a result, the ceiling surface 103 or the wall surface 102a is cooled. By this operation, it is possible to prevent the cold air from directly hitting the human being in the room 105, and it is possible to make the room 105 in a comfortable state by the radiation generated by cooling the ceiling surface 103 or the wall surface 102a. Since the cold air comes down downward, it is effective to cool the side of the ceiling surface 103 or the wall surface 102a.

Further, during the indirect air conditioning operation, the amount of power generated by the photovoltaic power generation device 10 is larger than the reference power generation amount, that is, the output of the photovoltaic power generation device 10 is large. Therefore, even if the power consumption of the air conditioner 27 increases by lowering the target temperature or increasing the air volume when cooling the ceiling surface 103 or the wall surface 102a, the photovoltaic power generation device 10 generates electric power. It can be covered by effective use of electricity.

Further, by cooling the ceiling surface 103 or the wall surface 102a, which is a structure constituting the room 105, the cooling effect of the room 105 is maintained as compared with the case where the wind direction is not directed to the ceiling surface 103 or the wall surface 102a, and the sun is maintained. Cooling can be weakened at night when the photovoltaic power generation device 10 stops generating power. As a result, it is possible to save power as compared with the conventional case when looking at the total amount of power used in one day.

In FIG. 4, with respect to the reference power generation amount graph A0, as shown in graph A2, in the case of cloudy weather, the amount of solar radiation is small and the amount of power generation is small. In such a cloudy weather, it is predicted that the temperature will not rise as compared with the case of fine weather. Therefore, the air conditioning unit 27 is normally operated according to the setting information. As shown in Graph A3, in the case of cloudy weather and then sunny weather, the solar radiation recovers on the way and the amount of power generation exceeds the reference power generation amount of Graph A0. In this case, the above-mentioned indirect air conditioning operation is performed from the time when the limit is exceeded. Here, an example of the operation when the operation mode is the cooling operation is shown, but the operation when the operation mode is the heating operation is also the same. However, since the warm air rises, the wind direction is changed in the direction of the wall surface 102a or the floor surface 104 during the indirect air conditioning operation.

FIG. 5 is a flowchart showing an example of the procedure of the air conditioning control method in the remote controller of the air conditioning system according to the first embodiment. Here, a case where the air conditioning unit 27 is controlled by the remote controller 30 will be described. Further, during the indirect air conditioning operation, a case where the wind direction is controlled to be directed to the wall surface 102a will be given as an example in both the cooling operation and the heating operation.

First, the air conditioning control unit 36 controls the air conditioning unit 27 so as to perform normal operation based on the setting information (step S11). Next, the power generation amount acquisition unit 32 acquires the power generation amount from the power conditioner 12 (step S12), and the power generation amount comparison unit 35 compares the power generation amount with the standard power generation amount, and the power generation amount is larger than the standard power generation amount. It is determined whether it is large (step S13). If the power generation amount is not larger than the reference power generation amount (No in step S13), the process returns to step S11.

When the power generation amount is larger than the reference power generation amount (Yes in step S13), the air conditioning control unit 36 controls the air conditioning unit 27 so that the wind speed is higher than the wind speed set in the setting information (step). S14). Subsequently, the air conditioning control unit 36 determines whether or not the wind direction setting is automatic (step S15). This is done by the air conditioning control unit 36 confirming the wind direction setting in the setting information.

When the wind direction setting is automatic (Yes in step S15), the air conditioning control unit 36 controls to direct the wind direction of the air conditioning unit 27 toward the wall surface 102a (step S16). Here, the case where the wind direction during the indirect air conditioning operation is directed to the wall surface 102a is shown, but the wind direction may be directed to the ceiling surface 103 during the cooling operation instead of the wall surface 102a, or to the floor surface 104 during the heating operation. You may turn it.

When the wind direction setting is not automatic (No in step S15), that is, when the wind direction is specified, the air conditioning control unit 36 swings the wind direction between the specified direction and the wall surface 102a. The air conditioning unit 27 is controlled so as to (step S17). Here, the case where the wind direction during indirect air conditioning operation is directed toward the wall surface 102a is shown, but instead of swinging the wind direction between the specified direction and the wall surface 102a, it is designated as the ceiling surface 103 during cooling operation. The wind direction may be swung between the floor surface 104 and the designated direction during the heating operation.

After that or after step S16, the air conditioning control unit 36 determines the type of operation mode (step S18). When the operation mode is cooling operation (cooling in step S18), the air conditioning control unit 36 lowers the target temperature below the target temperature set in the setting information (step S19). When the operation mode is the heating operation (in the case of heating in step S18), the air conditioning control unit 36 raises the target temperature higher than the target temperature set in the setting information (step S20).

After that or after step S19, the power generation amount acquisition unit 32 acquires the power generation amount from the power conditioner 12 (step S21), and the power generation amount comparison unit 35 determines whether the power generation amount is larger than the reference power generation amount (step S21). Step S22). When the power generation amount is larger than the reference power generation amount (Yes in step S22), the process returns to step S21.

If the amount of power generation is not larger than the standard amount of power generation (No in step S22), the air conditioning control unit 36 returns the wind speed, wind direction, and target temperature to the contents set in the setting information, and is based on the setting information. The air conditioning unit 27 is controlled so as to carry out normal operation (step S23). This completes the process.

In winter, it is possible to suppress heating when the temperature rises due to the amount of solar radiation, but by warming the wall surface 102a or the floor surface 104 with the power generated by the photovoltaic power generation device 10, the photovoltaic power generation device The heating effect can be obtained even at night when 10 does not generate electricity. As a result, the effect of obtaining a space with a comfortable temperature can be expected. Further, since the warm air rises, it is effective to heat the side of the wall surface 102a or the floor surface 104.

FIG. 6 is a flowchart showing an example of the procedure of the ventilation control method in the remote controller of the air conditioning system according to the first embodiment. Here, a case where the ventilation unit 26 is controlled by the remote controller 30 will be described.

First, the concentration acquisition unit 37 acquires the CO ₂ concentration from the CO ₂ sensor 28 (step S31). Next, the ventilation control unit 38 compares the acquired CO ₂ concentration with the reference value, and determines whether the CO ₂ concentration is larger than the reference value (step S32).

When the CO ₂ concentration is not higher than the reference value (No in step S32), the ventilation control unit 38 controls the ventilation unit 26 so as to execute a normal ventilation operation (step S33). The normal ventilation operation is, for example, a ventilation operation with a predetermined air volume. After that, the process returns to step S31.

When the CO ₂ concentration is higher than the reference value (Yes in step S32), the ventilation control unit 38 causes the ventilation unit 26 to execute the CO ₂ exhaust operation, which is the operation in which the exhaust of CO ₂ is prioritized. Is controlled (step S34). The CO ₂ exhaust operation at this time is an operation state in which exhaust is performed so as to reduce the CO ₂ concentration in the room 105 with a predetermined air volume, and may be referred to as a normal CO ₂ exhaust operation below. ..

Subsequently, the power generation amount acquisition unit 32 acquires the power generation amount from the power conditioner 12 (step S35), and the power generation amount comparison unit 35 compares the power generation amount with the reference power generation amount, and the power generation amount is higher than the reference power generation amount. Is also large (step S36).

When the power generation amount is larger than the reference power generation amount (Yes in step S36), the ventilation control unit 38 increases the air volume of the ventilation unit 26 in order to enhance the exhaust operation of CO ₂ (step S37). After that, the concentration acquisition unit 37 acquires the CO ₂ concentration from the CO ₂ sensor 28 (step S38). Next, the ventilation control unit 38 compares the acquired CO ₂ concentration with the reference value, and determines whether the CO ₂ concentration is larger than the reference value (step S39).

If the CO ₂ concentration is not higher than the reference value (No in step S39), the process proceeds to step S33. That is, the ventilation control unit 38 controls the ventilation unit 26 so as to execute a normal ventilation operation.

When the CO ₂ concentration is higher than the reference value (Yes in step S39), the power generation amount acquisition unit 32 acquires the power generation amount from the power conditioner 12 (step S40), and the power generation amount comparison unit 35 The power generation amount and the reference power generation amount are compared, and it is determined whether the power generation amount is larger than the reference power generation amount (step S41). When the power generation amount is larger than the reference power generation amount (Yes in step S41), the process returns to step S38. That is, the CO ₂ exhaust operation in which the air volume is increased will be continued.

When the amount of power generation is smaller than the reference power generation amount in step S36 or step S41 (No in step S36 or step S41), the ventilation control unit 38 causes the ventilation unit 26 to perform normal CO ₂ exhaust operation. Control (step S42).

After that, the concentration acquisition unit 37 acquires the CO ₂ concentration from the CO ₂ sensor 28 (step S43). Next, the ventilation control unit 38 compares the acquired CO ₂ concentration with the reference value, and determines whether the CO ₂ concentration is larger than the reference value (step S44).

If the CO ₂ concentration is not higher than the reference value (No in step S44), the process proceeds to step S33. That is, the ventilation control unit 38 controls the ventilation unit 26 so as to execute a normal ventilation operation. On the other hand, when the CO ₂ concentration is higher than the reference value (Yes in step S44), the process proceeds to step S35. The above processing is executed.

In the above description, a case where the ventilation unit 26 is made to execute the CO ₂ exhaust operation so as to reduce the CO ₂ concentration has been described. The CO ₂ exhaust operation is an operation aimed at improving the air quality, which is the property of the air in the room 105. Therefore, the target is not limited to CO ₂ exhaust, but other gas components or pollen may be targeted. In this case, instead of the CO ₂ sensor 28, a sensor capable of detecting other gas components or pollen is used. The air quality indicates the properties of air, and is indicated by, for example, the CO ₂ concentration, or the concentration of other gas components such as odorous substances emitted from the human body or pollutants such as pollen. The sensor that detects the air quality including CO ₂ , other gas components and pollen is an air quality sensor. Therefore, the process in steps S32, S39, and S44 can be generalized to a process of determining whether or not the air quality detected by the air quality sensor is worse than a predetermined reference value.

Further, in the above description, the operation of the air conditioning unit 27 and the ventilation unit 26 has been described individually, but the remote controller 30 may operate only one of the air conditioning unit 27 and the ventilation unit 26, or give priority to one of them. Or both may be operated at the same time.

For example, when the amount of power generation is larger than the reference power generation amount and the air quality detected by the air quality sensor is worse than the predetermined reference value, the ventilation unit is more than the indirect air conditioning operation in the air conditioning unit 27. Ventilation operation at 26 can be prioritized. In this case, the air conditioning control unit 36 and the ventilation control unit 38 operate in cooperation with each other.

In the first embodiment, when the amount of power generated by the photovoltaic power generation device 10 is larger than the reference power generation amount, the air volume is increased, and during the cooling operation, the wind direction is changed to the wall surface 102a or the ceiling surface 103, and the target temperature is lowered. During the heating operation, the wind direction was changed to the wall surface 102a or the floor surface 104, and the indirect air conditioning operation for raising the target temperature was carried out. As a result, during the cooling operation, the colder wind hits the wall surface 102a, and during the heating operation, the warmer wind hits the wall surface 102a, and the structure separating the indoor 105 and the outside is cooled or heated. As a result, the temperature of the structure that separates the room 105 from the outside can reduce the speed at which the temperature approaches the outside temperature. Then, the power saving effect when air-conditioning the indoor 105 at night when the solar power generation device 10 does not generate power can be enhanced as compared with the conventional case.

Further, by directing the wind direction to the wall surface 102a during the indirect air conditioning operation, it is suppressed that the colder wind directly hits the person in the room 105 during the cooling operation, and the warmer wind directly hits the person in the room 105 during the heating operation. Is suppressed. That is, it is possible to perform air conditioning with improved comfort for the person in the room 105 as compared with the conventional case.

By the way, in a house which is a residential building 100, a resident may be absent during the daytime. It is normal to keep the air conditioner off when you are absent. However, when the weather is fine and the amount of solar radiation is large in the summer, the outside temperature rises and the temperature inside the house also rises considerably, and by the time the inhabitants return home, the indoor 105 becomes hot and uncomfortable. It is not uncommon to be there. In such a case, even if the above-mentioned indirect air-conditioning operation is performed by effectively utilizing the generated power obtained from the photovoltaic power generation device 10 in good weather as compared with normal, the wall surface 102a or the ceiling surface 103 may be cooled. good. As a result, it can be expected to provide a space in the room 105 that is maintained in a comfortable state even when the resident returns home due to the heat storage action and radiation of the wall surface 102a or the ceiling surface 103.

For example, it is assumed that the air-conditioning unit 27 is provided with an absent automatic operation mode as a function. In the absent automatic operation mode, the air conditioning control unit 36 normally stops the air conditioning operation, but monitors the state of the power generation amount of the photovoltaic power generation device 10 and the temperature of the room 105, and the power generation amount is higher than the standard power generation amount. When it is large and the temperature of the room 105 is higher than a predetermined value, the above-mentioned indirect air conditioning operation with the wind direction directed to the wall surface 102a or the ceiling surface 103 is automatically executed.

In the above description, the example of the cooling operation in the summer has been described, but the heating operation in the winter can also be operated in the same absent automatic operation mode. In this case, the air conditioning control unit 36 normally stops the air conditioning operation, but monitors the state of the photovoltaic power generation device 10 and the temperature of the room 105, and the amount of power generation is larger than the reference power generation amount and the room 105. When the temperature of the above is lower than a predetermined value, the indirect air conditioning operation with the wind direction directed to the wall surface 102a or the floor surface 104 is automatically executed. This also makes it possible to provide a comfortable indoor environment for the residents who have returned home.

Embodiment 2.
In the second embodiment, a method of calculating a reference power generation amount, which is a reference for comparison of the power generation amount of the photovoltaic power generation device 10 when executing the indirect air conditioning operation, will be described.

FIG. 7 is a diagram for explaining an example of a method for calculating a reference power generation amount according to the second embodiment. In FIG. 7, the horizontal axis shows the time in one day, and the vertical axis shows the amount of power generated by the photovoltaic power generation device 10. Normally, the solar cell 11 is configured by combining several solar cell modules in series or in parallel. Further, the solar cell module is indicated with a nominal value with respect to the generated power. An example of the nominal value is the nominal maximum output, which is the maximum output of the solar cell module. In the second embodiment, the reference power generation amount is set based on the nominal value of the power generated by the solar cell module of the photovoltaic power generation device 10. Specifically, the number of series-parallel units of the solar cell module to be used is multiplied by the nominal maximum output, and the graph B1 which is the transition of the amount of power generation is obtained in consideration of the change in illuminance. The graph B2 of the reference power generation amount is set by multiplying the graph B1 of this transition by a coefficient less than 1.0.

When the nominal value is the nominal maximum output, it is assumed that the amount of power generation is from the nominal value, assuming the transition of the actual power generation amount in consideration of the conditions including the installation angle, orientation and local temperature of the solar cell 11. A coefficient for calculating the standard power generation amount may be set from the ratio with the actual power generation amount. Alternatively, the transition of the power consumption of the facility in which the photovoltaic power generation device 10 is installed may be compared with the transition of the actual amount of power generation, and a ratio may be set in which the indirect air conditioning operation may be started.

In the second embodiment, the maximum output of the solar cell 11 is obtained according to the electrical combination of the solar cell modules using the nominal maximum output of the solar cell module, and the maximum output of the solar cell 11 has a coefficient of less than 1.0. Was multiplied to calculate the standard power generation amount. This has the effect that the standard power generation amount for each facility can be easily set.

Embodiment 3.
In the second embodiment, the season is not considered for the standard power generation amount. In the third embodiment, a method of calculating the standard power generation amount in consideration of the season will be described.

FIG. 8 is a diagram for explaining an example of a method for calculating a reference power generation amount according to the third embodiment. In FIG. 8, the horizontal axis shows the time in one day, and the vertical axis shows the amount of power generated by the photovoltaic power generation device 10. The amount of power generated by the photovoltaic power generation device 10 varies depending on the number of series-parallel units, the installation orientation, and the installation angle with respect to the nominal maximum output of the solar cell module. In addition, the amount of solar radiation and temperature will vary depending on the area and season in which it is installed, so the amount of power generation will change. Therefore, it is desirable to execute a simulation of the amount of power generation in consideration of these conditions for the photovoltaic power generation device 10. Graph CS1 in FIG. 8 shows the transition of the power generation amount in the summer assumed from the nominal value, and graph CW1 is an example showing the transition of the power generation amount in the winter season assumed from the nominal value.

As described in the second embodiment, the reference power generation amount is calculated by multiplying the transition of the assumed power generation amount for each season by a coefficient. Graph CS2 in FIG. 8 is a transition of the standard power generation amount in the summer, and graph CW2 is a transition of the standard power generation amount in the winter season. The coefficient may be changed according to the seasonal power consumption of the facility in which the photovoltaic power generation device 10 is installed.

The reference power generation amount may be set not for each season but for each period that can be averaged within a range in which the conditions of the power generation environment in the photovoltaic power generation device 10 are considered to be substantially the same, such as monthly. At this time, the reference power generation amount is set based on the value obtained by estimating the power generation amount for each period from the nominal value of the power generation power of the photovoltaic power generation device 10. In one example, the estimated value of the power generation amount for each period is calculated based on the power generation amount acquired from the power conditioner 12, and the reference power generation amount is set based on the calculated estimated value of the power generation amount for each period. At this time, even if the estimated value of the power generation amount for each period is corrected at any time based on the power generation amount acquired from the power conditioner 12, and the reference power generation amount is updated by the estimated value of the power generation amount for each period corrected at any time. good.

In the third embodiment, the standard power generation amount is set for each season. This makes it possible to perform control according to the actual state of power generation of the photovoltaic power generation device 10 as compared with the case of the second embodiment.

Embodiment 4.
In the fourth embodiment, setting of the standard power generation amount when the power generation amount repeatedly becomes larger or smaller than the standard power generation amount due to frequent changes in the weather will be described.

FIG. 9 is a diagram showing an example of a transition of the power generation amount of the photovoltaic power generation device according to the fourth embodiment. In FIG. 9, the horizontal axis shows the time in one day, and the vertical axis shows the amount of power generated by the photovoltaic power generation device 10. In FIG. 9, the graph D1 shows the transition of the reference power generation amount, the graph D2 shows the transition of the power generation amount on a cloudy day, and the graph D3 shows the average power generation amount of the graph D2.

If the sun is clouded or sunny repeatedly on a cloudy day, the amount of solar radiation will drop if the sun is covered with clouds, and the amount of power generation will drop below the standard amount of power generation. If it is fine, the amount of power generation has dropped just before the temperature of the solar cell 11 has dropped, and the solar cell 11 is irradiated with the direct light from the sun and the scattered light reflected from the surrounding clouds. The amount of power generation may increase temporarily and exceed the standard amount of power generation. Under such meteorological conditions, it is desirable not to control the air conditioning as the power generation state as shown in the graph D3. However, in the methods shown in the first to third embodiments, the actual power generation amount shown in the graph D2 and the reference power generation amount shown in the graph D1 are compared, and the control operation of the indirect air conditioning operation is performed and canceled. Will be repeated.

FIG. 10 is a diagram for explaining an example of a method of calculating the power generation amount of the photovoltaic power generation device according to the fourth embodiment. In FIG. 10, the horizontal axis shows the time in one day, and the vertical axis shows the amount of power generated by the photovoltaic power generation device 10. FIG. 10 shows a transition in which the average value of the amount of power generation is calculated for each unit time. In this figure, the graph E1 is the average value of the reference power generation amount for each unit time, and the graph E2 is the average value of the power generation amount for each unit time on a clear day. The averaging time, that is, the unit time may be every hour, or it is temporary due to the change in the amount of power generation in consideration of the average cloud transition speed, the influence of the scattered light accompanying it, and the temperature rise of the solar cell 11. The time may be set so that the fluctuation of the amount of power generation can be sufficiently absorbed.

The power generation amount comparison unit 35 of the remote controller 30 compares the average value of the power generation amount for each unit time with the average value of the reference power generation amount for each unit time, and determines whether or not the indirect air conditioning operation can be controlled. do. In one example, by averaging the amount of power generation, the amount of power generation in cloudy weather approaches the graph D3 in FIG. That is, the average value of the amount of power generation for each unit time is lower than the average value of the standard power generation amount for each unit time. As shown in Graph D2 of FIG. 9, even when the power generation amount repeatedly exceeds or falls below the reference power generation amount, the averaged power generation amount is used for the determination. Since it is smaller than the standard power generation amount, the control process of the indirect air conditioning operation is not performed. In this case, since the averaged power generation amount is compared, the time for comparison and determination is, in one example, every unit time. Further, the average value of the power generation amount for each unit time is an example of the power generation amount index, and the average value of the standard power generation amount for each unit time is an example of the reference value.

In the fourth embodiment, the feasibility of controlling the indirect air conditioning operation is determined by comparing the average value of the power generation amount for each unit time and the average value of the reference power generation amount for each unit time. As a result, even when the weather changes in a short period of time such as on a cloudy day, it is possible to prevent the indirect air conditioning operation from being repeatedly switched. That is, stable control can be performed without being affected by weather changes such as cloudy days.

Embodiment 5.
In the fourth embodiment, the feasibility of controlling the indirect air conditioning operation is determined by comparing the average value of the power generation amount for each unit time and the average value of the reference power generation amount for each unit time. In the fifth embodiment, a case where the determination is performed using the integrated power amount, which is the integrated value of the power generation amount for each unit time, instead of the power generation amount, will be described.

FIG. 11 is a block diagram schematically showing an example of the configuration of the air conditioning system according to the fifth embodiment. The same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The air conditioning system 1 according to the fifth embodiment further includes an electric energy meter 13 for measuring the electric energy generated by the photovoltaic power generation device 10. In one example, the electricity meter 13 is provided in the photovoltaic power generation device 10. Further, since the watt-hour meter 13 is connected to the remote controller 30 via wiring, the power conditioner 12 and the remote controller 30 are not connected by wiring.

In the fourth embodiment, the power generation amount and the reference power generation amount of the photovoltaic power generation device 10 are converted into the average power of the unit time and compared, but the same effect can be obtained even if the integrated power amount of each unit time is compared. Can be obtained. However, although the electric energy meter 24 for selling power measures the integrated electric energy sent to the electric power system 25, since the electric energy consumption in the facility is subtracted, the electric energy generated by the pure photovoltaic power generation device 10 is not it. Therefore, in the fifth embodiment, the watt-hour meter 13 is installed at the output of the power conditioner 12, the electric energy for each unit time is integrated, and the integrated value of the generated electric energy for each unit time is calculated by the remote controller. Send to 30. In this case, the reference power generation amount obtained by integrating the reference power amount for each unit time is used. Further, the integrated electric energy for each unit time is an example of the power generation amount index, and the standard power generation amount for each unit time is the reference value.

FIG. 12 is a block diagram schematically showing another example of the configuration of the air conditioning system according to the fifth embodiment. The same components as those in FIGS. 1 and 11 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 12, the connection method for connecting the photovoltaic power generation device 10 to the power system 25 is different from that in FIGS. 1 and 11. In the example of FIG. 12, the connection method for connecting the photovoltaic power generation device 10 to the power system 25 is not through the distribution board 22 that distributes the power to the load in the facility, but through the power meter 24 for selling power. Is directly connected to the power system 25. This connection form is also called a total purchase because all the electric power generated by the photovoltaic power generation device 10 is reverse-flowed to the electric power company. Further, since the power meter 24 for selling power is connected to the remote controller 30 via wiring, the power conditioner 12 and the remote controller 30 are not connected by wiring.

In this connection mode, the integrated power amount for each unit time measured by the power selling power meter 24 is the power generation amount of the photovoltaic power generation device 10 for each unit time. Therefore, the remote controller 30 may receive the integrated electric energy for each unit time measured by the electric energy meter 24 for selling electric power. That is, in the example of FIG. 12, there is an advantage that it is not necessary to newly install the watt-hour meter 13 at the output of the power conditioner 12. Further, the watt-hour meter 24 for selling power in FIG. 12 is one form of the watt-hour meter.

In the fifth embodiment, the amount of power generated by the solar power generation device 10 is measured by the watt-hour meter 13, and the remote controller 30 integrates the amount of power generated by the watt-hour meter 13 for each unit time. Calculate the integrated electric energy for each unit time. The remote controller 30 uses the integrated electric energy for each unit time to determine the execution of control of the indirect air conditioning operation. Also according to the fifth embodiment, stable control can be performed without being affected by weather changes such as cloudy weather.

Further, in the fifth embodiment, since the watt-hour meter 13 or the watt-hour meter 24 for selling power and the remote controller 30 for measuring the amount of generated power are connected via wiring, the power conditioner does not have a communication function. Even the photovoltaic power generation device 10 provided with the 12 can control the indirect air conditioning operation.

If the power conditioner 12 has a communication function and can measure and output the amount of power generated per unit time, stable control should be performed without being affected by weather changes such as cloudy days. Is clearly possible.

Embodiment 6.
In the sixth embodiment, the air conditioner and the air conditioner system 1 that can cope with the case where the output control is performed according to the schedule will be described.

FIG. 13 is a block diagram schematically showing an example of the configuration of the air conditioning system according to the sixth embodiment. The same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The air conditioning system 1 according to the sixth embodiment further includes a power sensor 29 for power flow measurement on the power system 25 side of the distribution board 22.

In recent years, output control has been performed for the photovoltaic power generation device 10. This is done to balance supply and demand in the grid of grid power. When the amount of power generated by the photovoltaic power generation device 10 is large and the power demand is low due to conditions such as the amount of solar radiation and temperature, the voltage and frequency of the distribution network rise due to oversupply, and stable operation of the distribution network is maintained. Output control is performed to avoid being unable to do so. The power conditioner 12 of the photovoltaic power generation device 10 has an output control function of acquiring an output control schedule in advance and suppressing the output when the corresponding time zone comes. Depending on the scale of the photovoltaic power generation device 10, the output control may exceed the required power of the output control as long as the power is not sent to the power system 25, or the output may be suppressed as requested by the output control. And there is.

When the photovoltaic power generation device 10 performs output control, the power conditioner 12 acquires a schedule related to output control from an output control server (not shown) via a public line using a communication means (not shown). Then, the power conditioner 12 suppresses the output at a designated ratio with respect to the installed capacity of the photovoltaic power generation device 10 at the designated date and time.

When this output control is performed, the power generation amount of the photovoltaic power generation device 10 is stopped or the output is suppressed, so that the power generation amount does not correspond to the amount of solar radiation. If the temperature for air conditioning control is changed based on this amount of power generation, there is a possibility that the control opposite to the originally expected control will be performed.

When the output is controlled, the photovoltaic power generation device 10 is allowed to increase the output within a range that does not reverse power flow to the power system 25. Therefore, in the sixth embodiment, the power flow for measuring the power flow is measured by the power sensor 29 and transmitted to the power conditioner 12, and the power conditioner 12 adjusts the output according to the received measured value.

FIG. 14 is a diagram showing an example of changes in the amount of power generation when output control is performed. Here, a relationship diagram 141 showing the relationship between the output control amount and time is shown in the lower row, and a relationship diagram 142 showing the relationship between the power generation amount and the self-consumption amount is shown in the upper row. In the relationship diagram 141, the horizontal axis is the time and the vertical axis is the output control amount. In the relationship diagram 142, the horizontal axis is time and the vertical axis is electric power. Relationship FIG. 141 shows a graph F0 of an output control command. In this example, a schedule showing that the output control amount is limited to 20% in the time zone T1 is shown.

Relationship FIG. 142 shows a graph F1 of the power generation amount during non-output control showing the transition of the power generation amount when the output control is not performed, and the output control showing the transition of the power generation amount when the output is suppressed according to the output control command. A graph F2 of the amount of power generation per hour and a graph F3 of the self-consumption amount showing the transition of the self-consumption amount due to the load in the facility are shown. Further, the region G surrounded by the graph F2 and the graph F3 indicates the amount of power generation allowed by the photovoltaic power generation device 10 even during output control.

Relationship On the time axis of FIG. 142, output control is not performed in the time zones T11 and T14, and output control is performed in the time zones T12 and T13. The time zones T12 and T13 correspond to the time zone T1 in the relationship diagram 141. The time zone T12 is a time zone in which output control is performed, and is a time zone in which the graph F1 showing the amount of power generation during non-output control exceeds the graph F3 showing the self-consumption amount. The time zone T13 is a time zone in which output control is performed, and is a time zone in which the graph F3 showing the self-consumption amount exceeds the graph F1 showing the power generation amount during non-output control. Therefore, in the time zone T12, the output of the photovoltaic power generation device 10 can be increased within a range not exceeding the graph F3 showing the self-consumption amount. In the time zone T13, since the graph F3 showing the self-consumption amount exceeds the graph F1 showing the power generation amount during non-output control, the photovoltaic power generation device 10 is substantially independent of the output control and is the maximum in this time zone T13. Can be output.

With respect to such an operation of the photovoltaic power generation device 10, the remote controller 30 acquires information on whether or not output control is performed from the power conditioner 12, and explains in other embodiments in the time zones T11 and T14. Similarly, air conditioning control will be implemented according to the comparison result between the power generation amount index and the standard value. Further, the remote controller 30 performs air conditioning control in the time zones T12 and T13 without comparing the reference value and the power generation amount index. At this time, the power conditioner 12 adjusts the output according to the measured value of the power flow measured by the power sensor 29 for power flow measurement.

In the sixth embodiment, the remote controller 30 acquires the schedule related to the output control from the power conditioner 12, and performs the air conditioning control without comparing the power generation amount index and the reference value in the output control time zone. During the output control time zone, the power conditioner 12 adjusts the output according to the measured value of the power flow measured by the power sensor 29 for power flow measurement. Further, the remote controller 30 can carry out indirect air conditioning operation regardless of whether or not the amount of power generation is larger than the reference value. On the other hand, the remote controller 30 performs air conditioning control according to the comparison result between the power generation amount index and the reference value in the time zone other than the output control. As a result, even when the photovoltaic power generation device 10 is performing output control, it is possible to effectively utilize the suppressed power generation amount without causing a malfunction due to the suppression of the output.

If the output is suppressed as required by the output control, there is no surplus power that can be effectively utilized. Therefore, the air conditioning unit 27 cools the temperature of the structure including the wall surface 102a, the ceiling surface 103, and the floor surface 104. , Or the warming control operation, and the preferential exhaust operation of, for example, CO ₂ by the ventilator are not performed. That is, the indirect air conditioning operation is stopped.

Further, in recent years, the electric power generated by the photovoltaic power generation device 10 is sent to the electric power system 25, that is, the unit price of electric power sold by reverse power flow is higher than the unit price of electric power supplied from the electric power system 25, that is, the unit price of electric power purchased by smooth flow. It's getting cheaper. Therefore, it is more cost effective to consume the generated power of the photovoltaic power generation device 10 in-house. Therefore, in the case where the output control is not instructed to the photovoltaic power generation device 10 and the reverse power flow is possible and the power generation amount> the self-consumption amount, the above-described embodiment is used without reverse power flow. It can be said that it is cost effective to configure the indirect air conditioning operation described above.

Next, the configuration of the hardware that realizes the remote controller 30 of the air conditioner according to the first to sixth embodiments will be described. FIG. 15 is a diagram schematically showing an example of a hardware configuration that realizes the remote controller according to the first to sixth embodiments. The remote controller 30 can be realized by the processing circuit 200 shown in FIG.

The processing circuit 200 includes a processor 201, a memory 202, an input circuit 203, and an output circuit 204. The processor 201 is a CPU (Central Processing Unit, central processing unit, processing unit, arithmetic unit, microprocessor, microprocessor, processor, also referred to as DSP), a system LSI (Large Scale Integration), or the like. The memory 202 is a non-volatile or non-volatile memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Memory), and an EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory). Volatile semiconductor memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc) and the like.

The remote controller 30 can be realized by reading the corresponding program from the memory 202 and executing the processor 201. The input circuit 203 is used when receiving information processed by the processor 201, information stored in the memory 202, and the like from the outside. The output circuit 204 is used to output the information generated by the processor 201 and the information stored in the memory 202 to the outside.

The configuration shown in the above embodiments is an example, and can be combined with another known technique, can be combined with each other, and does not deviate from the gist. It is also possible to omit or change a part of the configuration.

1 Air conditioning system, 10 photovoltaic power generation equipment, 11 solar cells, 12 power conditioners, 13 watt-hour meters, 22 distribution boards, 23 watt-hour meters for buying power, 24 watt-hour meters for selling power, 25 power systems, 26 Ventilation unit, 27 air conditioning unit, 28 CO ₂ sensor, 29 power sensor for power flow measurement, 30 remote controller, 31 setting information storage unit, 32 power generation amount acquisition unit, 33 time acquisition unit, 34 standard power generation amount storage unit, 35 power generation amount Comparison unit, 36 air conditioning control unit, 37 concentration acquisition unit, 38 ventilation control unit, 100 buildings, 101 roof, 102 outer wall, 102a wall surface, 103 ceiling surface, 104 floor surface, 105 indoor.

Claims (14)

An air conditioner that air-conditions the room to be air-conditioned by cooling or heating,
A control unit that controls the operation of the air conditioning unit so that the room reaches the target temperature,
It is an air conditioner that can be operated by the electric power generated by the solar power generation device.
The control unit directs the wind direction to the structure constituting the indoor space when the power generation amount index, which is an index indicating the power generation amount of the solar power generation device, is larger than a predetermined reference value. An air conditioner characterized in that the operation is executed by the air conditioner unit. The control unit is characterized in that the indirect air conditioning operation is executed by the air conditioning unit when the air conditioning operation in the air conditioning unit is stopped and the power generation amount index is larger than the reference value. The air conditioner according to claim 1. The first or second aspect of the present invention, wherein the control unit directs the wind direction of the indirect air conditioning operation to a wall surface, a ceiling surface, or a floor surface of the room according to the type of the operating state of the air conditioning unit. Air conditioner. The control unit
When the operating state is the cooling operation, the wind direction of the indirect air conditioning operation is directed toward the wall surface or the ceiling surface.
The air conditioner according to claim 3, wherein when the operating state is a heating operation, the wind direction of the indirect air conditioning operation is directed toward the wall surface or the floor surface. When the wind direction is set in a predetermined direction, the control unit may be used.
When the operating state is the cooling operation, the wind direction of the indirect air conditioning operation is swung between the predetermined direction and the ceiling surface or the wall surface.
The third aspect of claim 3, wherein when the operating state is a heating operation, the wind direction of the indirect air conditioning operation is swung between the predetermined direction and the floor surface or the wall surface. Air conditioner. The air conditioner according to any one of claims 1 to 5, wherein the power generation amount index is a power generation amount generated by the solar power generation device. The air conditioner according to any one of claims 1 to 5, wherein the power generation amount index is an average value of the power generation amount generated by the solar power generation device for each unit time. The air conditioner according to any one of claims 1 to 5, wherein the power generation amount index is the power generation amount per unit time. The air conditioner according to any one of claims 1 to 8, wherein the reference value is set based on a nominal value for the generated power of the photovoltaic power generation device. The reference value is set for each period in which the conditions of the power generation environment in the photovoltaic power generation device are considered to be the same.
The air conditioner according to any one of claims 1 to 8, wherein the reference value is set based on an estimated value of the amount of power generated by the solar power generation device for each period. The air conditioner according to claim 10, wherein the period is a season or a month. The air conditioner according to claim 10 or 11, wherein the reference value is updated by an estimated value of the power generation amount for each period of the solar power generation device which is corrected from time to time. The air conditioner according to any one of claims 1 to 12, and the air conditioner.
The ventilation unit that ventilates the room and
A control unit that controls ventilation by the ventilation unit,
An air quality sensor that detects the air quality, which is the property of indoor air,
Equipped with
The control unit is the indirect of the air conditioning unit when the air quality detected by the air quality sensor is worse than a predetermined threshold value and the power generation amount index is larger than the reference value. An air conditioning system characterized in that the ventilation operation of the ventilation unit is prioritized over the air conditioning operation. The control unit determines whether or not the power generation amount index is larger than the reference value when the photovoltaic power generation device suppresses the output by the output control function for the purpose of stable operation of the power system. The air conditioning system according to claim 13, wherein the indirect air conditioning operation can be performed regardless of the above.

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