JP7335147B2 - air conditioning system - Google Patents

Description

The present invention provides an upper floor air conditioner for air conditioning the upper floor indoor space and a lower floor indoor space for air conditioning in a building having an atrium space communicating with an upper floor indoor space and a lower floor indoor space. It relates to an air conditioning system separately provided with a lower floor side air conditioner.

In a building having an atrium space that communicates with an indoor space on the upper floor and an indoor space on the lower floor, an upper floor air conditioner for air conditioning the indoor space on the upper floor and a lower floor for air conditioning the indoor space on the lower floor There is known an air-conditioning system separately provided with a side air-conditioning device (see Patent Document 1, for example). In general, the operation control unit of this type of air conditioning system continues the operation of the upper floor side air conditioner and the lower floor side air conditioner, and controls the upper floor side indoor space and the lower floor side indoor space by the respective air conditioners. It has an individual air-conditioning mode that air-conditions the space individually. That is, in this individual air-conditioning mode, the indoor space on the upper floor and the indoor space on the lower floor are air-conditioned in a state in which the amount of air supplied from the air supply port and the amount of air returned from the return air port are substantially equal. will take place.

Furthermore, in the air conditioning system described in Patent Document 1, in order to eliminate the temperature difference that occurs between the indoor space on the upper floor and the indoor space on the lower floor, The air supply port of the indoor space is closed, all the conditioned air generated by the air conditioner is blown out from the indoor space on one side, and the return air equivalent to the amount of the blown conditioned air is sent from the indoor space on the other side. An air-conditioning mode for the purpose of eliminating the temperature difference is provided. That is, in the air-conditioning mode for the purpose of eliminating the temperature difference, a relatively strong airflow is generated that flows from the indoor space on one side into the indoor space on the other side through the atrium space, thereby eliminating the temperature difference between those spaces. will be

JP 2016-033424 A

However, in the temperature difference elimination air conditioning mode of the air conditioning system described in Patent Document 1, the return air port is closed in the indoor space on one side to which the conditioned air is supplied from the air conditioner, and air is not returned. Air corresponding to the total amount of conditioned air supplied from the air conditioner to the indoor space on one side flows into the indoor space on the other side through the blowout space. Therefore, there is a problem that a relatively strong air current is generated in the indoor space on the other side, and the air current impairs the comfort of the person in the room. In this air conditioning mode, the conditioned air that has passed through the indoor space on one side and has been air-conditioned flows into the indoor space on the other side. In order to sufficiently treat the air-conditioning load, it is necessary to increase the output of the air-conditioning system more than necessary for the entire air-conditioning load.

In view of this situation, the main object of the present invention is to improve the comfort of each indoor space by using air conditioners that are individually provided for the upper floor side indoor space and the lower floor side indoor space that communicate with the atrium space. To provide an air conditioning system capable of improving energy saving performance without impairing

A first characteristic configuration of the present invention is a building having an atrium space that communicates with an upper-floor indoor space and a lower-floor indoor space. As air conditioners for blowing conditioned air from the mouth, an upper floor side air conditioner for air conditioning the upper floor side indoor space and a lower floor side air conditioner for air conditioning the lower floor side indoor space are separately provided,
Individual air conditioning for individually air-conditioning the indoor space on the upper floor and the indoor space on the lower floor by continuing the operation of the upper floor side air conditioner and the lower floor side air conditioner, respectively. An air conditioning system comprising an operation control unit having modes,
The operation control unit stops the operation of one of the upper floor side air conditioner and the lower floor side air conditioner as an operation continuing air conditioner while continuing the operation of the other side as an operation stop air conditioner. and an air-conditioning mode using a blowhole for switching the connection destination of the return air port of the indoor space on the shutdown side to be air-conditioned by the shutdown air conditioner to the side of the continuous-operation air conditioner.

According to this configuration, the operation control unit can switch the air conditioning mode between the individual air conditioning mode and the air conditioning mode using the fukinuki.
In the individual air-conditioning mode, conditioned air is circulated in a state in which the amount of air supplied from the air supply port and the amount of air returned from the return air port are approximately equal in each of the indoor space on the upper floor and the indoor space on the lower floor. It can be comfortably air-conditioned. In addition, in the atrium space, air conditioning can be comfortably performed by conditioned air circulating in the adjacent indoor spaces in each area communicating with the respective indoor spaces.
On the other hand, in the air-conditioning mode using the blowout, blowing of conditioned air from the air supply port is stopped when the operation of the operation-stopped air conditioner is stopped in the operation-stopped indoor space to be air-conditioned by the operation-stopped air conditioner. . On the other hand, as the connection destination of the return air port is switched to the side of the continuous operation air conditioner, intake of return air from the return air port is continued. That is, in this air-conditioning mode using the atrium, conditioned air is supplied only in the indoor space on the continuous operation side, which is the indoor space on one side of the indoor space on the upper floor and the indoor space on the lower floor, and which is the air conditioning target of the continuous operation air conditioner. While blowing out, intake of return air continues in both indoor spaces. Then, part of the conditioned air blown out from the indoor space on the operation continuation side is taken into the operation continuation air conditioner from the return air outlet of the indoor space on the operation continuation side, and the rest is taken into the operation stop side indoor space through the blowout space. flow into the space. Therefore, while realizing energy saving by stopping the operation of the shutdown air conditioner, it is possible to properly air-condition the indoor space and the open space with rational and appropriate airflow.
Therefore, according to the present invention, energy can be saved without impairing the comfort of each indoor space by using the air conditioners individually provided for the upper floor side indoor space and the lower floor side indoor space communicating with the atrium space. It is possible to provide an air conditioning system that can improve performance.

In a second characteristic configuration of the present invention, the operation control unit performs air conditioning mode switching control to switch the air conditioning mode between the individual air conditioning mode and the air conditioning mode using the blowhole based on the air conditioning load, and the air conditioning mode In the switching control, the air conditioning mode when the air conditioning load is in the high load range is set to the individual air conditioning mode, and the air conditioning mode when the air conditioning load is in the low load range smaller than the high load range is the fukinuki use. The point is to set the air conditioning mode.

According to this configuration, when the air conditioning load is in the high load range, the air conditioning is performed in the above-described individual air conditioning mode by executing the air conditioning mode switching control by the operation control unit, and the air conditioning load of the upper floor side indoor space is reduced. is processed by the upper floor side air conditioner, and the air conditioning load of the lower floor side indoor space is processed by the lower floor side air conditioner. Therefore, a relatively large air conditioning load can be reliably handled by both the upper floor side air conditioner and the lower floor side air conditioner.
On the other hand, when the air conditioning load is in the low load range, the operation control unit executes the air conditioning mode switching control so that air conditioning is performed in the above-described air conditioning mode using the blowhole, and only the air conditioner continues to operate with a relatively small air conditioning load. to process. Therefore, it is possible to realize rational operation by maintaining the output such as the air supply air volume of the continuous operation air conditioner at the rated level.

A third characteristic configuration of the present invention is that the operation control unit cools the return air in the air conditioner to generate cool air as the conditioned air in the air conditioning mode using the blowing, and the air conditioning on the upper floor is performed during the cooling operation. An air-conditioning mode using blow-out during cooling operation, in which the device is the continuous operation air conditioner and the downstairs side air conditioner is the out-of-operation air conditioner, and the air conditioner heats the return air to generate warm air as the conditioned air. At least one of an air-conditioning mode using a blowout during heating operation in which the lower floor side air conditioner is the continuous operation air conditioner and the upper floor side air conditioner is the non-operating air conditioner during the heating operation.

According to this configuration, during cooling operation or heating operation, air conditioning is performed in the air conditioning mode using the blowout during cooling operation or the air conditioning mode using the blowout during heating operation. Air currents of conditioned air directed toward the indoor space can be generated favorably.
That is, by performing air conditioning in the air conditioning mode using the blowout during cooling operation during cooling operation, in the blowout space, the cold air flowing in from the indoor space on the upper floor to which cold air is supplied from the air conditioner on the upper floor is heated to a temperature higher than that. The specific gravity difference from the surrounding air can be used to suitably lower the air and allow it to flow into the lower floor side indoor space.
On the other hand, during heating operation, air conditioning is performed in the air conditioning mode using the ventilation system during heating operation. The difference in specific gravity from the surrounding air can be used to favorably raise the air and allow it to flow into the upper-floor-side indoor space.

A fourth characteristic configuration of the present invention is that each of the upper floor side indoor space and the lower floor side indoor space is provided with return air volume adjustment means capable of adjusting the return air volume from the return air port,
The operation control unit adjusts the return air volume by the return air volume adjustment means in each of the upper floor side indoor space and the lower floor side indoor space while operating the continuous operation air conditioner at the rated level in the air conditioning mode using the blowhole. The point is that the air-conditioning mode room temperature control using Fukinuki is executed to adjust the room temperature to the target room temperature.

According to this configuration, when the operation control unit performs air conditioning in the above-described air conditioning mode using the fukinuki, the room temperature control in the air conditioning mode using the fukinuki is executed, so that the continuous operation of the air conditioner can be maintained at a high efficiency rating. While maintaining the operation, the return air volume from each of the upper floor side indoor space and the lower floor side indoor space is separately controlled by the return air volume adjustment means, and the upper floor side indoor space and the lower floor side indoor space Each room temperature can be appropriately adjusted to the target room temperature.

In the fifth characteristic configuration of the present invention, in each of the upper floor side indoor space and the lower floor side indoor space, the air supply port is arranged on the side of the communicating part to the atrium space, and the return air port is The point is that it is arranged on the side opposite to the communicating portion.

According to this configuration, it is possible to appropriately air-condition the indoor space and the atrium space in the individual air-conditioning mode and the atrium-utilizing air-conditioning mode.
That is, in the individual air conditioning mode, in each of the upper-floor indoor space and the lower-floor indoor space, the return air outlet is arranged on the opposite side from the air supply port arranged on the side of the communication portion to the atrium space. Since the conditioned air circulates toward the , the entire indoor space can be appropriately air-conditioned to every corner. In addition, in the blowout space, each region communicating with the respective indoor space can be appropriately air-conditioned with the conditioned air immediately after being blown out from the adjacent air supply port.
On the other hand, in the air-conditioning mode using the blowout, part of the conditioned air blown out from the air supply port arranged in the communication portion of the indoor space on the continuous operation side with the blowout space flows through the indoor space on the continuous operation side. Since the air is taken in by the return air port on the opposite side, the entire indoor space on the continuous operation side can be appropriately air-conditioned to every corner. Furthermore, the remainder of the conditioned air blown out from the air supply port arranged in the communication portion of the operation continuation side indoor space to the atrium space flows through the atrium space in the state immediately after the blowout, and then flows into the operation stop side indoor space. flow into Therefore, even in this case, it is possible to properly air-condition the atrium space and the indoor space on the shutdown side.

The figure which shows the operating state in the individual air-conditioning mode in the air-conditioning system of 1st Embodiment. A diagram showing an operating state in an air-conditioning mode using a blowout during cooling operation in the air-conditioning system of the first embodiment. A diagram showing an operating state in an air-conditioning mode using a blowout during heating operation in the air-conditioning system of the first embodiment. The figure which shows the operating state in the individual air-conditioning mode in the air-conditioning system of 2nd Embodiment. A diagram showing an operating state in an air-conditioning mode using a blowout during cooling operation in the air-conditioning system of the second embodiment. A diagram showing the operating state of the air conditioning system of the second embodiment in the air conditioning mode using the blowout during heating operation.

[First Embodiment]
A first embodiment of an air conditioning system according to the present invention will be described with reference to FIGS. 1 to 3. FIG.
As shown in FIG. 1, in a building 1 in which the air conditioning system (main air conditioning system) of the present embodiment is installed, an upper floor side indoor space 10A that is an upper floor side indoor space and a lower floor side indoor space 10A The floor-side indoor space 10B is communicated with the floor-side indoor space 20 by an atrium space 20 in which stairs and the like are arranged. The upper floor indoor space 10A and the lower floor indoor space 10B are respectively provided with an upper floor air conditioner 30A for air conditioning the upper floor indoor space 10A and a lower floor indoor space 10B for air conditioning. A lower floor side air conditioner 30B is separately provided.
In this embodiment, the lower-floor indoor space 10B is configured as an indoor space for one floor on the first floor, and the upper-floor indoor space 10A is configured as an indoor space for one floor on the second floor. It is configured. Also, the ceiling height of the upper floor indoor space 10A is set to be higher than that of the lower floor indoor space 10B. In the building 1, the floors on which these indoor spaces 10A and 10B are provided may be changed as appropriate.

Each of the indoor spaces 10A and 10B has an air supply port 14 for blowing out the conditioned air supplied from the air conditioners 30A and 30B as supply air SA, and a return air for taking in the return air RA into the air conditioners 30A and 30B. A mouth 15 is arranged. The air supply port 14 is arranged on the side of the communicating portion to the atrium space 20 , and the return air port 15 is arranged on the wall portion 13 located on the side opposite to the communicating portion to the atrium space 20 .
In this embodiment, in the lower-floor indoor space 10B, a plurality of air supply ports 14 are dispersedly arranged on the ceiling surface extending toward the communication part to the atrium space 20, and in the upper-floor indoor space 10A, A plurality of air supply ports 14 are arranged in a distributed manner on the ceiling facing the upper floor indoor space 10A and the atrium space 20 . In each of the indoor spaces 10A and 10B, the location and number of arrangement of the air supply port 14 and the air return port 15 can be appropriately changed.

Each of the air conditioners 30A and 30B takes in the return air RA from the return air port 15 through the return air duct 32 to cool or heat the indoor spaces 10A and 10B to be air-conditioned, and cools or heats the treated return air RA. The conditioned air is configured to blow downward from the air supply port 14 through the air supply duct 31 as the air supply SA.
A return air duct 32 of each of the air conditioners 30A and 30B is provided with a temperature sensor 18, a return air volume adjustment valve 16 (an example of return air volume adjustment means), and an on-off valve 33. FIG. The temperature sensor 18 measures the temperature of the return air RA taken in from the return air port 15 as the room temperature of the indoor spaces 10A and 10B to be air-conditioned, and outputs the measurement results to the control device 40 . The return air volume adjustment valve 16 is controlled by the control device 40 so as to adjust the return air volume, which is the volume of the return air RA taken in from the return air port 15 . The opening/closing valve 33 is controlled to open/close by the control device 40, and is configured to be able to intermittently introduce the return air RA taken from the return air port 15 into the air conditioners 30A and 30B.

A bypass duct 35 connected to all of the return air ducts 32 provided in each of the indoor spaces 10A and 10B is provided. The bypass duct 35 is provided with an on-off valve 36 capable of switching the inflow of the return air RA from each of the return air ducts 32 and the outflow of the return air RA to each of the return air ducts 32 .

The air conditioning system is provided with a control device 40 (an example of an operation control section) that functions as an air conditioning operation control section 41, an air conditioning mode switching control section 42, and an air conditioning mode room temperature control section 43 using a fukinuki, which will be described later.
The air conditioning operation control unit 41 is configured to selectively switch the operation state of each of the air conditioners 30A and 30B between the cooling operation and the heating operation based on the command operation by the user, the outside air temperature, and the like. there is That is, each of the air conditioners 30A and 30B is operated in a mode in which the return air RA is cooled in the cooling operation and cold air CA (see FIG. 2) is generated as the conditioned air (supply air SA), and in the heating operation the return air is cooled. The air RA is heated to generate warm air HA (see FIG. 3) as conditioned air (supply air SA).

The control device 40 selects an individual air conditioning mode (see FIG. 1) as an air conditioning mode that indicates the operation status of each of the air conditioners 30A and 30B and the circulation status of the return air RA and supply air SA of the entire system, although the details will be described later. ) and an air-conditioning mode using a blowout, and as the air-conditioning mode using a blowout, an air-conditioning mode using a blowout during cooling operation (see FIG. 2) selected during the cooling operation and an air conditioning using a blowout during heating operation selected during the heating operation mode (see FIG. 3).
The air-conditioning mode switching control unit 42 executes air-conditioning mode switching control to switch the air-conditioning mode between the individual air-conditioning mode (see FIG. 1) and the air-conditioning mode using the fukinuki (see FIGS. 2 and 3) based on the air-conditioning load. is configured as
The fukinuki air conditioning mode room temperature control unit 43 executes the fukinuki air conditioning mode room temperature control for appropriately adjusting the room temperature of each of the indoor spaces 10A and 10B to the target room temperature during air conditioning by the fukinuki air conditioning mode. It is configured.
The operation mode of the air conditioning system in each mode will be described below.

(individual air conditioning mode)
The mode of operation of this air conditioning system in the individual air conditioning mode will be described with reference to FIG.
The individual air conditioning mode is an air conditioning mode in which the operation of the air conditioners 30A and 30B is continued to individually air-condition the indoor spaces 10A and 10B by the air conditioners 30A and 30B. It is selected in the air conditioning mode switching control when the load is in the high load range.

That is, in the individual air conditioning mode, all the air conditioners 30A and 30B are in a state in which the on-off valves 33 provided in all the return air ducts 32 are opened and the on-off valves 36 provided in the bypass ducts 35 are closed. Cooling operation or heating operation is performed.
Then, in each of the indoor spaces 10A and 10B, the supply air volume, which is the air volume of the supply air SA blown from the air supply port 14, and the return air volume, which is the air volume of the return air RA taken into the return air port 15, are substantially equal. Thus, conditioned air flows from the air supply port 14 arranged on the communication side to the blowout space 20 toward the return air port 15 arranged on the wall portion 13 on the opposite side. In this state, the entire indoor spaces 10A and 10B are comfortably and appropriately air-conditioned to every corner.
In addition, in the blowout space 20, each region communicating with the respective indoor spaces 10A and 10B is comfortably and appropriately air-conditioned by the conditioned air immediately after being blown out from the air supply port 14 in the vicinity thereof.

Air conditioning in this individual air conditioning mode is performed when the air conditioning load is in a high load range during cooling operation or heating operation, and the air conditioning loads of the respective indoor spaces 10A and 10B are controlled by the separate air conditioners 30A and 10B. 30B. Therefore, a relatively large air conditioning load can be reliably handled by all the air conditioners 30A and 30B.

In the individual air conditioning mode, room temperature control is performed on the indoor spaces 10A and 10B to be air-conditioned in the respective air conditioners 30A and 30B. In the room temperature control in the individual air conditioning mode, while maintaining the air volume supplied from the air supply port 14 by each of the air conditioners 30A and 30B at the rated air volume, the indoor space 10A to be air-conditioned measured by the temperature sensor 18, for example, The outputs of the air conditioners 30A and 30B are controlled to adjust the temperature of the conditioned air supplied as the supply air SA so that the room temperature of 10B is maintained at the target room temperature set by the user. In this room temperature control, the room temperature may be maintained at the target room temperature by adjusting the amount of air supplied from the air supply port 14 by each of the air conditioners 30A and 30B.

(Air-conditioning mode using atrium during cooling operation)
The mode of operation of the present air conditioning system in the blow-out air conditioning mode during cooling operation will be described with reference to FIG.
In the air-conditioning mode using atrium during cooling operation, one of the upper floor side air conditioner 30A and the lower floor side air conditioner 30B continues to operate as an operating air conditioner, while the other side operates as a stopped air conditioner. This is one of the blowout utilization air conditioning modes in which the air conditioner is stopped and the connection destination of the return air port 15 of the indoor space on the shutdown side to be air-conditioned by the shutdown air conditioner is switched to the operation continuation air conditioner side. During cooling operation, the air-conditioning mode using the blow-out is selected in the air-conditioning mode switching control when the air-conditioning load is in the low load range during the cooling operation, and the upper floor side air-conditioning device 30A is set as the continuous operation air-conditioning device. This is an air conditioning mode in which the floor-side air conditioner 30B is the above-described shutdown air conditioner.

That is, in the air-conditioning mode using blowout during cooling operation, the on-off valve 33 provided in the return air duct 32 of the upper floor side air conditioner 30A and the on-off valve 36 provided in the bypass duct 35 are opened, and the lower floor side air conditioning is turned on. With the on-off valve 33 provided in the return air duct 32 of the device 30B closed, the upper floor air conditioner 30A is operated for cooling, and the lower floor air conditioner 30B is stopped.
Then, in the lower-floor-side indoor space 10B (operation-stopped-side indoor space) of the first floor portion to be air-conditioned by the lower-floor-side air-conditioner 30B (operation-stopped-side indoor space), the operation of the lower-floor-side air-conditioner 30B (operation-stopped-side indoor space) is stopped. Blowing of cool air CA from the air supply port 14 is stopped. On the other hand, as the connection destination of the return air port 15 is switched to the upper floor side air conditioner 30A side through the bypass duct 35, intake of the return air RA from the return air port 15 is continued. That is, in this air-conditioning mode using blow-out during cooling operation, cold air CA is blown out only in the upper floor side indoor space 10A of the second floor portion, which is the indoor space on the side where operation is continued, while return air outlets are provided in all the indoor spaces 10A and 10B. The intake of return air RA from 15 continues. Then, part of the cold air CA blown out from the upper floor side indoor space 10A is taken into the upper floor side air conditioner 30A from the return air port 15 of the upper floor side indoor space 10A, and the rest is taken into the upper floor side air conditioner 30A through the atrium space 20. It flows into the floor-side indoor space 10B. Therefore, the indoor spaces 10A and 10B and the atrium space 20 are comfortably and appropriately cooled by rational and appropriate air currents while realizing energy saving by stopping the operation of the lower floor side air conditioner 30B.

Air-conditioning in the blow-out air conditioning mode during cooling operation is performed when the air-conditioning load is in a low load range during cooling operation, and a relatively small air-conditioning load is handled only by the upper floor air conditioner 30A. Therefore, it is possible to maintain the output of the upper floor side air conditioner 30A, such as the air supply air volume, at the rated level, thereby achieving rational operation.

In the air conditioning mode using the atrium during cooling operation, cold air CA supplied from the upper floor side air conditioner 30A to the upper floor side indoor space 10A side flows into the upper floor side of the atrium space 20 from the upper floor side indoor space 10A side. . Then, in the atrium space 20, the cold air CA that has flowed into the upper floor side preferably descends to the lower floor side by utilizing the difference in specific gravity from the surrounding air, which has a higher temperature, and flows into the lower floor side indoor space 10B. will do.

In the air-conditioning mode using the atrium during cooling operation, the room temperature control unit 43 in the air-conditioning mode using the atrium maintains the amount of air supplied from the air supply port 14 by the upper-floor air conditioner 30A to the upper-floor indoor space 10A at the rated air amount. , Air-conditioning mode using a blowout in which the return air volume is controlled by the return air volume adjustment valve 16 in each of the indoor spaces 10A and 10B, and the room temperature of each of the indoor spaces 10A and 10B measured by the temperature sensor 18 is adjusted to the target room temperature. Room temperature control is performed.

(Air-conditioning mode using atrium during heating operation)
The mode of operation of the present air conditioning system in the air conditioning mode using blowout during heating operation will be described with reference to FIG.
In the air-conditioning mode using the blowout during heating operation, one of the upper floor side air conditioner 30A and the lower floor side air conditioner 30B continues to operate as an air conditioner that continues to operate, while the other side operates as a stopped air conditioner. This is one of the blowout utilization air conditioning modes in which the air conditioner is stopped and the connection destination of the return air port 15 of the indoor space on the shutdown side to be air-conditioned by the shutdown air conditioner is switched to the operation continuation air conditioner side. During heating operation, the air-conditioning mode using the blowout is selected in the air-conditioning mode switching control when the air-conditioning load is in the low load range during the heating operation. This is an air conditioning mode in which the floor-side air conditioner 30A is the above-described shutdown air conditioner.

That is, in the air-conditioning mode using blowout during heating operation, the on-off valve 33 provided in the return air duct 32 of the lower floor side air conditioner 30B and the on-off valve 36 provided in the bypass duct 35 are opened, and the upper floor side air conditioning is turned on. With the on-off valve 33 provided in the return air duct 32 of the device 30A closed, the lower floor air conditioner 30B is operated for heating, and the upper floor air conditioner 30A is stopped.
Then, in the upper floor-side indoor space 10A (operation-stopped indoor space) of the second floor portion to be air-conditioned by the upper-floor-side air conditioner 30A (operation-stopped air conditioner), the operation of the upper-floor-side air conditioner 30A is stopped. Then, the hot air HA from the air supply port 14 is stopped. On the other hand, as the connection destination of the return air port 15 is switched to the lower floor side air conditioner 30B side through the bypass duct 35, intake of the return air RA from the return air port 15 is continued. That is, in this air-conditioning mode using blowout during heating operation, warm air HA is blown out only in the lower-floor-side indoor space 10B of the first floor portion, which is the indoor space on the continuation-of-operation side, while return air outlets are provided in all of the indoor spaces 10A and 10B. The intake of return air RA from 15 continues. Then, part of the warm air HA blown out in the lower-floor indoor space 10B is taken into the lower-floor air conditioner 30B from the return air port 15 of the lower-floor indoor space 10B, and the rest is taken up through the atrium space 20. It flows into the floor-side indoor space 10A. Therefore, the indoor spaces 10A and 10B and the atrium space 20 are comfortably and appropriately heated with rational and appropriate air currents while realizing energy saving by stopping the operation of the upper floor side air conditioner 30A.

Air-conditioning in the air-conditioning mode using the blowout during heating operation is performed when the air-conditioning load is in a low load range during the heating operation, and the relatively small air-conditioning load is handled only by the lower floor air conditioner 30B. Therefore, it is possible to maintain the output of the lower floor side air conditioner 30B, such as the amount of air supplied, at the rated level, thereby achieving rational operation.

In the air conditioning mode using the atrium during heating operation, the warm air HA supplied from the lower floor side air conditioner 30B to the lower floor indoor space 10B side flows into the lower floor side of the atrium space 20 from the lower floor indoor space 10B side. . Then, in the atrium space 20, the warm air HA that has flowed into the lower floor side preferably rises to the upper floor side by utilizing the difference in specific gravity from the ambient air, which is cooler than that, and flows into the upper floor side indoor space 10A. will do.
Furthermore, as in the present embodiment, especially in an indoor space with a large ceiling height such as the upper floor side indoor space 10A, when the warm air HA is blown out from the air supply port 14 arranged on the ceiling, the specific gravity difference In some cases, the warm air HA cannot be efficiently supplied to the lower living area due to the influence of , and this becomes noticeable especially when the air volume is reduced during a low load. However, in the air-conditioning mode using the atrium during heating operation, in the upper-floor indoor space 10A having a higher ceiling height than the lower-floor indoor space 10B, warm air HA flows from the lower-floor indoor space 10B side through the atrium space 20. By supplying the heat, the formation of temperature stratification that increases the temperature toward the ceiling is suppressed, and the lower living area is efficiently heated.

In the air-conditioning mode using the atrium during heating operation, the room temperature control unit 43 in the air-conditioning mode using the atrium maintains the amount of air supplied from the air supply port 14 by the lower-floor air conditioner 30B to the lower-floor indoor space 10B side at the rated air amount. , Air-conditioning mode using a blowout in which the return air volume is controlled by the return air volume adjustment valve 16 in each of the indoor spaces 10A and 10B, and the room temperature of each of the indoor spaces 10A and 10B measured by the temperature sensor 18 is adjusted to the target room temperature. Room temperature control is performed.

[Second embodiment]
A second embodiment of the air conditioning system according to the present invention will be described with reference to FIGS. 4 to 6. FIG.
In addition, in this embodiment, the same code|symbol is attached|subjected and demonstrated to the structure part which has the same function as 1st Embodiment mentioned above.

As shown in FIG. 4, in a building 1 in which the air conditioning system (main air conditioning system) of the present embodiment is installed, an upper floor side indoor space 10A that is an upper floor side indoor space and a lower floor side indoor space 10A The floor-side indoor space 10B is communicated with the floor-side indoor space 20 by an atrium space 20 in which stairs and the like are arranged. The upper floor indoor space 10A and the lower floor indoor space 10B are respectively provided with an upper floor air conditioner 30A for air conditioning the upper floor indoor space 10A and a lower floor indoor space 10B for air conditioning. A lower floor side air conditioner 30B is separately provided.
In this embodiment, the lower floor side indoor space 10B is configured as an indoor space for two layers, the first floor portion and the second floor portion, and the upper floor side indoor space 10A is configured as the third floor portion and the fourth floor portion. It is configured as an indoor space for two layers. In the building 1, the floors on which these indoor spaces 10A and 10B are provided may be changed as appropriate. Further, the number of layers of the upper floor side indoor space 10A and the lower floor side indoor space 10B can be changed as appropriate.

Each of the indoor spaces 10A and 10B has an air supply port 14 for blowing out the conditioned air supplied from the air conditioners 30A and 30B as supply air SA, and a return air for taking in the return air RA into the air conditioners 30A and 30B. A mouth 15 is arranged. The air supply port 14 is arranged on the side of the communicating portion to the atrium space 20 , and the air return port 15 is arranged on the wall portion 13 located on the side opposite to the communicating portion to the atrium space 20 .
That is, in the present embodiment, in each of the indoor spaces 10A and 10B, the air supply port 14 is arranged on the side wall surface of the ceiling portion facing the atrium space 20. As shown in FIG. In each of the indoor spaces 10A and 10B, the location and number of arrangement of the air supply port 14 and the air return port 15 can be appropriately changed.

Each of the air conditioners 30A and 30B takes in the return air RA from the return air port 15 through the return air duct 32 to cool or heat the indoor spaces 10A and 10B to be air-conditioned, and cools or heats the treated return air RA. The conditioned air is configured to be blown out from the air supply port 14 toward the blowout space 20 through the air supply duct 31 as the air supply SA.
A return air duct 32 of each of the air conditioners 30A and 30B is provided with a temperature sensor 18, a return air volume adjustment valve 16 (an example of return air volume adjustment means), and an on-off valve 33. FIG. The temperature sensor 18 measures the temperature of the return air RA taken in from the return air port 15 as the room temperature of the indoor spaces 10A and 10B to be air-conditioned, and outputs the measurement results to the control device 40 . The return air volume adjustment valve 16 is controlled by the control device 40 so as to adjust the return air volume, which is the volume of the return air RA taken in from the return air port 15 . The opening/closing valve 33 is controlled to open/close by the control device 40, and is configured to be able to intermittently introduce the return air RA taken from the return air port 15 into the air conditioners 30A and 30B.

A bypass duct 35 connected to all of the return air ducts 32 provided in each of the indoor spaces 10A and 10B is provided. At the connecting portion of the bypass duct 35 to each of the return air ducts 32, an on-off valve is provided which can intermittently allow the return air RA to flow in from each of the return air ducts 32 and the return air RA to flow out to each of the return air ducts 32. 36 is provided.

The present air conditioning system is provided with a control device 40 that functions as an air conditioning operation control unit 41, an air conditioning mode switching control unit 42, an air conditioning mode room temperature control unit 43 using a fukinuki, and the like, which will be described later.
The air conditioning operation control unit 41 is configured to selectively switch the operation state of each of the air conditioners 30A and 30B between the cooling operation and the heating operation based on the command operation by the user, the outside air temperature, and the like. there is That is, each of the air conditioners 30A and 30B is operated in a mode in which the return air RA is cooled in the cooling operation and cold air CA (see FIG. 5) is generated as the conditioned air (supply air SA), and in the heating operation the return air is cooled. The air RA is heated to generate warm air HA (see FIG. 6) as conditioned air (supply air SA).

The air-conditioning mode switching control unit 42 selects an air-conditioning mode indicating the operation state of each of the air conditioners 30A and 30B and the circulation state of the return air RA and the supply air SA of the entire system, based on the air-conditioning load, to an individual air-conditioning mode described later. (See FIG. 4) and the air conditioning mode using Fukinuki (see FIGS. 5 and 6). As the air-conditioning mode using the blowout, there is an air-conditioning mode using the blowout during the cooling operation (see FIG. 5) selected during the cooling operation, and an air-conditioning using the blowout during the heating operation (see FIG. 6) selected during the heating operation.
In addition, the air-conditioning mode room temperature control unit 43 using the air-conditioning mode using the air-conditioning mode using the air-conditioning mode using the air-conditioning mode using the air-conditioning mode for adjusting the room temperature of each of the indoor spaces 10A and 10B appropriately to the target room temperature during the air conditioning by the air-conditioning mode using the air-conditioning mode using the air-conditioning mode using the air-conditioning mode using the air-conditioning mode using the air-conditioning module 43. is configured as
The operation mode of the air conditioning system in each mode will be described below.

(individual air conditioning mode)
The mode of operation of this air conditioning system in the individual air conditioning mode will be described with reference to FIG.
The individual air conditioning mode is an air conditioning mode in which the operation of the air conditioners 30A and 30B is continued to individually air-condition the indoor spaces 10A and 10B by the air conditioners 30A and 30B. It is selected in the air conditioning mode switching control when the load is in the high load range.

That is, in the individual air conditioning mode, all the air conditioners 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30A, 30B is operated for cooling or heating.
Then, in each of the indoor spaces 10A and 10B, the supply air volume, which is the air volume of the supply air SA blown from the air supply port 14, and the return air volume, which is the air volume of the return air RA taken into the return air port 15, are substantially equal. Thus, conditioned air flows from the air supply port 14 arranged on the communication side to the blowout space 20 toward the return air port 15 arranged on the wall portion 13 on the opposite side. In this state, the entire indoor spaces 10A and 10B are comfortably and appropriately air-conditioned to every corner.
In addition, in the blowout space 20, each region communicating with the respective indoor spaces 10A and 10B is comfortably and appropriately air-conditioned by the conditioned air immediately after being blown out from the air supply port 14 in the vicinity thereof.

Air conditioning in this individual air conditioning mode is performed when the air conditioning load is in a high load range during cooling operation or heating operation, and the air conditioning loads of the respective indoor spaces 10A and 10B are controlled by the separate air conditioners 30A and 10B. 30B. Therefore, a relatively large air conditioning load can be reliably handled by all the air conditioners 30A and 30B.

In the individual air conditioning mode, room temperature control is performed on the indoor spaces 10A and 10B to be air-conditioned in the respective air conditioners 30A and 30B. In the room temperature control in the individual air conditioning mode, while maintaining the air volume supplied from the air supply port 14 by each of the air conditioners 30A and 30B at the rated air volume, the indoor space 10A to be air-conditioned measured by the temperature sensor 18, for example, The outputs of the air conditioners 30A and 30B are controlled to adjust the temperature of the conditioned air supplied as the supply air SA so that the room temperature of 10B is maintained at the target room temperature set by the user. In this room temperature control, the room temperature may be maintained at the target room temperature by adjusting the amount of air supplied from the air supply port 14 by each of the air conditioners 30A and 30B.

(Air-conditioning mode using atrium during cooling operation)
The mode of operation of the present air conditioning system in the blowout air conditioning mode during cooling operation will be described with reference to FIG.
In the air-conditioning mode using atrium during cooling operation, one of the upper floor side air conditioner 30A and the lower floor side air conditioner 30B continues to operate as an operating air conditioner, while the other side operates as a stopped air conditioner. This is one of the blowout utilization air conditioning modes in which the air conditioner is stopped and the connection destination of the return air port 15 of the indoor space on the shutdown side to be air-conditioned by the shutdown air conditioner is switched to the operation continuation air conditioner side. During cooling operation, the air-conditioning mode using the blowout is selected in the air-conditioning mode switching control when the air-conditioning load is in the low load range during the cooling operation, and each upper floor side air-conditioning device 30A is set as the continuous operation air-conditioning device. , and air conditioning modes in which each of the lower floor side air conditioners 30B is the above-described shutdown air conditioner.

That is, in the air-conditioning mode using blowout during cooling operation, the opening/closing valve 33 provided in the return air duct 32 of each upper floor side air conditioner 30A and the opening/closing valve 36 provided in the bypass duct 35 are opened, and each With the on-off valve 33 provided in the return air duct 32 of the lower floor air conditioner 30B closed, each upper floor air conditioner 30A is operated for cooling, and the operation of each lower floor air conditioner 30B is stopped. be done.
Then, in the lower-floor-side indoor spaces 10B (operation-stopped-side indoor spaces) of the first-floor portion and the second-floor portion to be air-conditioned by the respective lower-floor-side air conditioners 30B (operation-stopped air conditioners), the lower-floor-side indoor spaces Blowing of the cold air CA from the air supply port 14 is stopped when the operation of the air conditioner 30B is stopped. On the other hand, as the connecting destination of the return air port 15 is switched to the upper floor side air conditioner 30A side through the bypass duct 35, intake of the return air RA from the return air port 15 is continued. That is, in this air-conditioning mode using the atrium during cooling operation, while blowing out the cool air CA only in the upper floor side indoor spaces 10A of the third floor portion and the fourth floor portion, which are the indoor spaces on the continuous operation side, all the indoor spaces 10A are blown out. , 10B, the intake of the return air RA from the return air port 15 is continued. Then, part of the cold air CA blown out from each upper-floor indoor space 10A is taken into the upper-floor air conditioner 30A from the return air port 15 of the upper-floor indoor space 10A, and the remainder is taken into the atrium space 20. It flows into each lower-floor indoor space 10B through. Therefore, while energy saving is realized by stopping the operation of each of the lower floor side air conditioners 30B, the indoor spaces 10A and 10B and the atrium space 20 are comfortably and appropriately cooled by rational and moderate airflow. Become.

Air-conditioning in the air-conditioning mode using blowout during cooling operation is performed when the air-conditioning load is in a low load range during cooling operation, and a relatively small air-conditioning load is handled only by the upper floor air conditioners 30A. Therefore, it is possible to maintain the output of the air supply air volume and the like of each of the upper floor side air conditioners 30A at the rated level, thereby achieving rational operation.

In the air-conditioning mode using the atrium during cooling operation, the cool air CA supplied from the upper floor-side air conditioners 30A to the upper-floor indoor spaces 10A is supplied from the upper-floor indoor spaces 10A to the atrium 20. Enter upstairs. Then, in the atrium space 20, the cold air CA that has flowed into the upper floor side preferably descends to the lower floor side by utilizing the difference in specific gravity from the surrounding air, which has a higher temperature than the upper floor side, and the respective lower floor indoor spaces 10B. will flow into

In the air-conditioning mode using the atrium during cooling operation, the room temperature controller 43 in the air-conditioning mode using the atrium maintains the amount of air supplied from the air supply port 14 by each of the upper floor-side air conditioners 30A to the upper floor-side indoor space 10A side at the rated air volume. At the same time, the room temperature of each of the indoor spaces 10A and 10B measured by the temperature sensor 18 is adjusted to the target room temperature by controlling the return air volume with the return air volume adjustment valve 16 in each of the indoor spaces 10A and 10B. Air conditioning mode room temperature control is performed.

In the air-conditioning mode using fukinuki in cooling operation, the room temperature control unit 43 operates the plurality of continuously operating air conditioners (upper floor-side air conditioner 30A) sequentially from the lower floor as the air conditioning load decreases. is stopped and switched to the stopped air conditioner (lower floor side air conditioner 30B), the number control can be executed to reduce the number of air conditioners that continue to operate. That is, in such control of the number of units during cooling operation, the number of floors of the upper floor side indoor space 10A is determined in order from the upper floor side according to the air conditioning load, and the upper floor side installed in the upper floor side indoor space 10A is determined. The operation of the air conditioner 30A is continued, and the operation of the lower floor air conditioner 30B installed in the remaining lower floor indoor space 10B located on the lower floor side is stopped.

(Air-conditioning mode using atrium during heating operation)
The mode of operation of the present air conditioning system in the air conditioning mode using blowout during heating operation will be described with reference to FIG.
In the air-conditioning mode using the blowout during heating operation, one of the upper floor side air conditioner 30A and the lower floor side air conditioner 30B continues to operate as an air conditioner that continues to operate, while the other side operates as a stopped air conditioner. This is one of the blowout utilization air conditioning modes in which the air conditioner is stopped and the connection destination of the return air port 15 of the indoor space on the shutdown side to be air-conditioned by the shutdown air conditioner is switched to the operation continuation air conditioner side. The air-conditioning mode using the blowout during heating operation is selected in the air-conditioning mode switching control when the air-conditioning load is in the low load range during the heating operation, and each of the lower floor side air-conditioning devices 30B is set as the continuous operation air-conditioning device. , and air conditioning modes in which the respective upper floor side air conditioners 30A are the above-described shutdown air conditioners.

That is, in the air-conditioning mode using blowout during heating operation, the on-off valve 33 provided in the return air duct 32 of each of the lower floor side air conditioners 30B and the on-off valve 36 provided in the bypass duct 35 are opened. With the on-off valve 33 provided in the return air duct 32 of the upper floor air conditioner 30A closed, each lower floor air conditioner 30B is operated for heating, and the operation of each upper floor air conditioner 30A is stopped. be done.
Then, in the upper floor-side indoor spaces 10A (operation-stopped-side indoor spaces) of the 3rd and 4th-floor portions to be air-conditioned by the respective upper-floor-side air conditioners 30A (operation-stopped air conditioners), the upper-floor-side indoor spaces Blowing of the warm air HA from the air supply port 14 is stopped when the operation of the air conditioner 30A is stopped. On the other hand, as the connection destination of the return air port 15 is switched through the bypass duct 35 to the lower floor side air conditioner 30B side, intake of the return air RA from the return air port 15 is continued. That is, in this air-conditioning mode using the atrium during heating operation, warm air HA is blown out only in the lower-floor-side indoor spaces 10B of the first-floor portion and the second-floor portion, which are the indoor spaces on the continuous operation side, while all the indoor spaces 10A are blown out. , 10B, the intake of the return air RA from the return air port 15 is continued. Of the warm air HA blown out from each of the lower-floor-side indoor spaces 10B, part of it is taken into the lower-floor-side air conditioners 30B from the return air ports 15 of the lower-floor-side indoor spaces 10B, and the remainder is taken into the atrium-side spaces 20. It flows into each upper-floor side indoor space 10A through. Therefore, while energy saving is achieved by stopping the operation of each upper floor air conditioner 30A, the indoor spaces 10A and 10B and the atrium space 20 are comfortably and appropriately heated with rational and appropriate airflow. Become.

Air-conditioning in the air-conditioning mode using the blowout during heating operation is performed when the air-conditioning load is in the low load range during the heating operation, and the relatively small air-conditioning load is processed only by the respective lower floor side air conditioners 30B. . Therefore, it is possible to realize rational operation by maintaining the output such as the air supply air volume of each of the lower floor side air conditioners 30B at the rated level.

In the air-conditioning mode using the atrium during heating operation, the warm air HA supplied from the respective lower-floor-side air conditioners 30B to the respective lower-floor-side indoor spaces 10B is supplied to the atrium-side spaces 20 from the respective lower-floor-side indoor spaces 10B. Enter downstairs. Then, in the atrium space 20, the warm air HA that has flowed into the lower floor side preferably rises to the upper floor side by utilizing the difference in specific gravity from the surrounding air, which has a lower temperature than that, and rises to the respective upper floor indoor spaces 10A. will flow into
Furthermore, in the air conditioning mode using the atrium during heating operation, in the upper floor indoor space 10A, warm air HA is supplied from the lower floor indoor space 10B side through the atrium space 20, so that the temperature increases toward the ceiling. The formation of high temperature stratification is suppressed, and heating of the lower living area is efficiently performed.

In the air-conditioning mode using the atrium during heating operation, the room temperature controller 43 in the air-conditioning mode using the atrium maintains the air volume supplied from the air supply port 14 of each of the lower-floor-side air conditioners 30B to the lower-floor-side indoor space 10B side at the rated air volume. At the same time, the room temperature of each of the indoor spaces 10A and 10B measured by the temperature sensor 18 is adjusted to the target room temperature by controlling the return air volume with the return air volume adjustment valve 16 in each of the indoor spaces 10A and 10B. Air conditioning mode room temperature control is performed.

In the air-conditioning mode using fukinuki in heating operation, as the air conditioning load decreases, the fukinuki-using air conditioning mode room temperature control unit 43 sequentially operates the plurality of continuously operating air conditioners (lower floor-side air conditioner 30B) from the upper floor side. is stopped and switched to the stopped air conditioner (upper floor side air conditioner 30A), the number control can be executed to reduce the number of air conditioners that continue to operate. That is, in such control of the number of units during heating operation, the number of layers of the lower floor side indoor space 10B is determined in order from the lower floor side according to the air conditioning load, and the lower floor side installed in the lower floor side indoor space 10B is determined. The operation of the air conditioner 30B is continued, and the operation of the upper floor air conditioner 30A installed in the remaining upper floor indoor space 10A located on the upper floor side is stopped.

[Another embodiment]
Another embodiment of the present invention will be described. It should be noted that the configuration of each embodiment described below is not limited to being applied alone, and can be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, the air conditioning mode switching control unit 42 executes the air conditioning mode switching control to automatically switch the air conditioning mode based on the air conditioning load. Alternatively, the air conditioning mode may be switched manually.

(2) In the above embodiment, both the air conditioning mode using the blowout during cooling operation and the air conditioning mode using the blowout during heating operation are configured as air conditioning modes using the blowout. I do not care.

(3) In the above-described embodiment, the room temperature control unit 43 for the air-conditioning mode using the fukinuki causes the operation of the continuous air-conditioning device (upper-floor-side air-conditioning device 30A during cooling operation, lower-floor-side air conditioning device during heating operation) While the air conditioner 30B) is in rated operation, the return air volume is controlled by the return air volume adjustment valve 16 in each of the indoor spaces 10A and 10B, and the room temperature of each of the indoor spaces 10A and 10B measured by the temperature sensor 18 is the target. Although the room temperature control in the air-conditioning mode using the fukinuki is performed to adjust to the room temperature, the specific configuration of the air-conditioning mode using the fukinuki room temperature control can be changed as appropriate. The return air volume in 10A and 10B may be controlled.

(4) In the above embodiment, in one atrium space 20, the combination of the upper floor indoor space 10A of one or more layers and the lower indoor space 10B of one or more layers located on the lower floor side is one. Although an example in which units are provided has been described, for example, in one atrium space 20 provided in a high-rise building, units of combinations of the upper floor side indoor space 10A and the lower floor side indoor space 10B are arranged in the vertical direction. In this state, a plurality of units of the combination may be arranged. In this case, the operation control by the air conditioning system is executed for each combination unit of the upper floor side indoor space 10A and the lower floor side indoor space 10B.

1 Building 10A Upper floor indoor space (indoor space)
10B lower floor side indoor space (indoor space)
13 wall part (opposite side of communicating part)
14 Air supply port 15 Return air port 16 Return air volume adjustment valve (return air volume adjustment means)
20 Atrium space 30A Upper floor side air conditioner (air conditioner)
30B Lower floor side air conditioner (air conditioner)
40 control device (operation control unit)
41 Air-conditioning operation control unit 42 Air-conditioning mode switching control unit 43 Air-conditioning mode room temperature control unit CA using fukinuki Cool air (supply air)
HA warm air (air supply)
RA Return air SA Supply air

Claims (5)

As an air conditioner that takes in return air from a return air port and blows out conditioned air from an air supply port to the indoor space to be air-conditioned in a building that has an atrium space that communicates with the indoor space on the upper floor and the indoor space on the lower floor. , an upper floor side air conditioner for air conditioning the upper floor side indoor space and a lower floor side air conditioner for air conditioning the lower floor side indoor space,
Individual air conditioning for individually air-conditioning the indoor space on the upper floor and the indoor space on the lower floor by continuing the operation of the upper floor side air conditioner and the lower floor side air conditioner, respectively. An air conditioning system comprising an operation control unit having modes,
The operation control unit stops the operation of one of the upper floor side air conditioner and the lower floor side air conditioner as an operation continuing air conditioner while continuing the operation of the other side as an operation stop air conditioner. An air-conditioning system having an air-conditioning mode using a fukinuki in which a connection destination of a return air port of an indoor space on the shutdown side to be air-conditioned by the shutdown air conditioner is switched to the side of the continuous-operation air conditioner. The operation control unit executes air conditioning mode switching control for switching an air conditioning mode between the individual air conditioning mode and the air conditioning mode using the blowout based on the air conditioning load, and in the air conditioning mode switching control, when the air conditioning load is high. 2. The air conditioning mode when the air conditioning load is in the load range is set to the individual air conditioning mode, and the air conditioning mode when the air conditioning load is in the low load range smaller than the high load range is set to the air conditioning mode utilizing the blowhole. Air conditioning system as described. The operation control unit sets the upper floor side air conditioner as the continuous operation air conditioner during cooling operation in which the return air is cooled by the air conditioner to generate cool air as the conditioned air in the air conditioning mode using the blowout. An air-conditioning mode using a blowout during cooling operation in which the air conditioner on the lower floor side is the air conditioner whose operation is stopped, and the lower floor side in a heating operation in which the return air is heated by the air conditioner to generate warm air as the conditioned air. 3. The air-conditioning system according to claim 1, wherein the air-conditioning system has at least one of an air-conditioning mode using a blowout during heating operation in which the operation-continuing air-conditioner is used as the air-conditioner and the upper-floor side air-conditioner is the out-of-operation air-conditioner. Each of the upper floor side indoor space and the lower floor side indoor space is provided with return air volume adjustment means capable of adjusting the return air volume from the return air port,
The operation control unit adjusts the return air volume by the return air volume adjustment means in each of the upper floor side indoor space and the lower floor side indoor space while operating the continuous operation air conditioner at the rated level in the air conditioning mode using the blowhole. 4. The air conditioning system according to any one of claims 1 to 3, wherein air conditioning mode room temperature control using Fukinuki is performed to adjust the room temperature to the target room temperature. In each of the upper-floor indoor space and the lower-floor indoor space, the air supply port is arranged on the side of the communicating portion to the atrium space, and the return air port is arranged on the opposite side of the communicating portion. The air conditioning system according to any one of claims 1 to 4, wherein

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