JP7184484B2 - building air conditioning system - Google Patents

Description

The present invention relates to building air conditioning systems.

2. Description of the Related Art A central air-conditioning system is known that air-conditions the entire building using a common air conditioner in a building such as a residence. For example, Patent Literature 1 discloses, as such an air conditioning system, a system that performs air conditioning (cooling and heating) in a building using a plurality of air conditioners. In the air conditioning system of Patent Document 1, as air conditioners, a first air conditioner for air conditioning the first floor of the building and a second air conditioner for air conditioning the second floor of the building are provided. In this case, the first air conditioner generates conditioned air (cold or warm) and supplies the conditioned air through ducts to the rooms on the first floor. As a result, each room on the first floor is cooled and heated. In addition, the second air conditioner generates conditioned air (cold air or warm air) and supplies the conditioned air to each room on the second floor through ducts. As a result, each room on the second floor is cooled and heated.

An air conditioner has an indoor unit and an outdoor unit, and is configured by connecting the indoor unit and the outdoor unit to each other through refrigerant pipes. Here, during the heating operation of the air conditioner, the temperature of the heat exchanger incorporated in the outdoor unit may become low and frost may adhere. If frost adheres to the heat exchanger, it causes a decrease in heating efficiency. Therefore, in air conditioners, defrosting operation is periodically performed to prevent frost adherence.

JP-A-2012-88009

By the way, in the air conditioning system of Patent Document 1, when the defrosting operation is started in either the first air conditioner or the second air conditioner, the air conditioner stops the heating operation. Therefore, the room temperature of the room to be air-conditioned by the air conditioner may drop.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an air conditioning system for a building that can suppress a decrease in room temperature when the heating operation of an air conditioner is stopped due to the start of a defrosting operation or the like. The main purpose is to

In order to solve the above problems, a building air conditioning system of the first invention includes a plurality of air conditioners having an indoor unit and an outdoor unit and capable of at least heating operation, each of the air conditioners comprising a building An air-conditioning system for a building that air-conditions air-conditioned areas that are set so as not to overlap each other in the building, and is provided for each of the air conditioners to cool the warm air generated by the heating operation of the air conditioner. a first air-conditioning duct for supplying air to the air-conditioned area of the air conditioner; a second air conditioning duct for supplying the air-conditioned area of the other air conditioner different from the air conditioner, and warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner through the second air conditioning duct and switching means for switching between supply and non-supply.

In the air-conditioning system of the present invention, a plurality of air-conditioning devices capable of heating operation and defrosting operation are provided, and each air-conditioning device performs air-conditioning for each air-conditioned area. A first air conditioning duct is provided for each air conditioner, and during heating operation of the air conditioner, warm air generated by the heating operation is supplied to the air-conditioned area of the air conditioner through the first air conditioning duct. It has become so. As a result, each air conditioner heats each air-conditioned area.

In such an air-conditioning system, in the present invention, a second air-conditioning duct is provided in addition to the first air-conditioning duct for a predetermined air-conditioning unit among the air-conditioning units. In this case, warm air generated by a given air conditioner can be supplied to air-conditioned areas of other air conditioners through the second air conditioning duct. Further, whether or not warm air is supplied to the air-conditioned areas of other air conditioners can be switched by the switching means, and the switching is performed according to the operating state of the other air conditioners. In this case, when the heating operation is stopped due to the start of the defrosting operation of another air conditioner, it is possible to switch so that the warm air is supplied from the predetermined air conditioner to the air-conditioned area of the other air conditioner. As a result, it is possible to suppress a decrease in the room temperature of the air-conditioned area. As a result, it is possible to suppress a decrease in the room temperature when the heating operation of the air conditioner is temporarily stopped due to the defrosting operation or the like.

A building air-conditioning system of a second invention is the first invention, wherein the other air conditioner starts defrosting operation when a predetermined defrosting start condition is satisfied during the heating operation, The control means performs the switching to perform the other area air supply process of supplying the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner during the defrosting operation of the other air conditioner. It is characterized by controlling means.

According to the present invention, warm air generated by a predetermined air conditioner is supplied to the air-conditioned area of the other air conditioner under the control of the switching means during the defrosting operation of the other air conditioner. As a result, it is possible to prevent the room temperature of the air-conditioned area from decreasing due to the defrosting operation of the air conditioner.

A building air-conditioning system according to a third aspect of the invention, in the second aspect of the invention, further comprises determination means for determining that the defrosting start condition for the other air conditioner is about to be met, and the control means comprises the other The switching means is controlled to start the other area air supply process when it is determined that the defrosting start condition for the air conditioner is about to be satisfied.

According to the present invention, supply of warm air from a predetermined air conditioner to the air-conditioned area of the other air conditioner (other area air supply process) is started when the defrosting start condition of the other air conditioner is about to be satisfied. . In this case, since warm air is supplied to the air-conditioned area of the other air conditioner before the defrosting operation of the other air conditioner starts, it is possible to further suppress a decrease in room temperature due to the defrosting operation.

A building air-conditioning system according to a fourth aspect of the invention is characterized in that, in addition to the other air-conditioning devices, the predetermined air-conditioning device is also removed when a predetermined defrosting start condition is satisfied during the heating operation. determining means for determining that the defrosting start condition is about to be satisfied for the other air conditioner, and determination means for determining that the defrosting start condition is about to be satisfied for the other air conditioner whether or not there is a possibility that the defrosting operation of the predetermined air conditioner will be started during the defrosting operation of the other air conditioner that is started when the defrosting start condition is satisfied, when it is determined that and the control means predicts that the defrosting operation of the predetermined air conditioner may be started during the defrosting operation of the other air conditioner by the predicting means. case, the defrosting operation of the other air conditioner is immediately started.

According to the present invention, when the defrosting start condition of another air conditioner is about to be satisfied, the defrosting operation of a predetermined air conditioner is started during the defrosting operation of the other air conditioner that is started when the condition is satisfied. is likely to start. As a result of the prediction, if there is a possibility of starting, the defrosting operation of the other air conditioner is immediately started. That is, in this case, the defrosting operation of the air conditioner is started without waiting for the defrosting start condition of the other air conditioner to be satisfied. As a result, the defrosting operation of a predetermined air conditioner starts while the defrosting operation of another air conditioner is being performed, and the predetermined air conditioner cannot supply warm air to the air-conditioned areas of the other air conditioners. can be avoided from occurring. Therefore, it is possible to reliably prevent the room temperature from decreasing due to the defrosting operation of other air conditioners.

A building air-conditioning system according to a fifth aspect of the invention is the air-conditioning system for a building according to any one of the second to fourth aspects of the invention, wherein, before performing the other area air supply process, the predetermined air conditioner is in a non-heating operation. The predetermined air conditioner is caused to perform the heating operation when it is in the heating operation state, and the predetermined air conditioner is returned to the non-heating operation state after the end of the other area air supply process. do.

According to the present invention, when the predetermined air conditioner is in an operating state (non-heating operation state) different from the heating operation before performing the other area air supply process, the predetermined air conditioner is in the heating operation, After that, other area air supply processing (that is, processing for supplying warm air generated by the heating operation to air-conditioned areas of other air conditioners) is performed. After the end of the other area air supply process, the predetermined air conditioner is returned to the non-heating operation state before the other area air supply process. As a result, when the predetermined air conditioner is in the non-heating operation state before the other area air supply process, the predetermined air conditioner is only temporarily shifted to the heating operation during the other area air supply process. It is possible to avoid having a large impact on the air-conditioned area. The non-heating operation state includes a blowing operation state, a dehumidification operation state, an operation stop state, and the like.

A building air-conditioning system according to a sixth aspect of the invention is characterized in that, in any one of the second to fifth aspects of the invention, in addition to the first switching means as the switching means, the warm air generated by the predetermined air conditioner is switched to the first air conditioning system. A second switching means for switching whether to supply air to the air-conditioned area of the predetermined air conditioner through a duct is provided, and the control means switches the predetermined air conditioner from heating operation before performing the other area air supply process. is in a different operating state, the second switching means executes the heating operation of the predetermined air conditioner and prevents the warm air generated by the heating operation from being supplied to the air-conditioned area of the predetermined air conditioner. is characterized by controlling

According to the present invention, when the predetermined air conditioner is in an operating state (non-heating operation state) different from the heating operation before the other area air supply process is performed, the predetermined air conditioner is in the heating operation. At the same time, warm air generated by the heating operation is prevented from being supplied to the air-conditioned area of the predetermined air conditioner. In this case, during the other area air supply process, the warm air generated by the predetermined air conditioner is supplied only to the other air-conditioned area, so that the temperature drop in the air-conditioned area can be further suppressed.

A building air-conditioning system according to a seventh invention is the air-conditioning system according to any one of the first to sixth inventions, wherein each of the air-conditioning devices is the predetermined air-conditioning device provided with the second air-conditioning duct, and The switching means is provided for each of the second air conditioning ducts.

According to the present invention, since each air conditioner (predetermined air conditioner) is provided with the second air conditioning duct, each air conditioner distributes the warm air generated by the air conditioner to the air-conditioned areas of the other air conditioners. supply becomes possible. As a result, the effect of suppressing the room temperature of the air-conditioned area from decreasing during the defrosting operation of the air conditioner can be obtained in each air-conditioned area of each air conditioner.

The figure which shows the building in which the air conditioning system was provided. Sectional drawing which shows the internal structure of an air-conditioning chamber. The figure which shows the electrical structure of an air-conditioning system. 4 is a flowchart showing heating control processing; The flowchart which shows a process at the time of a 2nd defrosting operation. The figure which shows the building in which the air conditioning system in other embodiment was provided. The figure which shows the building in which the air conditioning system in other embodiment was provided.

An embodiment embodying the present invention will be described below with reference to the drawings. Note that FIG. 1 is a diagram showing a building provided with an air conditioning system.

As shown in FIG. 1, a building 10 such as a residence is a two-story building. The building 10 comprises a first floor portion 12 as a lower floor portion provided on a foundation 11, a second floor portion 13 as an upper floor portion provided on the first floor portion 12, and a second floor portion 13 above the second floor portion 13. and a roof portion 14 provided. The roof part 14 is configured by, for example, a gabled roof.

A first floor portion 12 of the building 10 is provided with a plurality of rooms 16-19. Of these rooms 16 to 19, rooms 16 to 18 are composed of, for example, a living room, a dining room, a Japanese-style room, and a bedroom. Also, the room 19 is a machine room 19 in which the indoor unit 51a of the air conditioner 51 is installed. The machine room 19 has a lowered ceiling. These rooms 16 to 19 are separated from each other by a partition wall 21 . The partition wall 21 has a pair of wall members 22 facing each other, and an inner wall space 23 is formed between the wall members 22 . For the sake of convenience, FIG. 1 shows the wall surface materials 22 and the wall space 23 only for the partition wall 21 between the rooms 17 and 18 .

A plurality of rooms 26 and 27 are provided in the second floor portion 13 of the building 10 as well as in the first floor portion 12 . These rooms 26 and 27 are separated by a partition wall 31 . The partition wall 31 has a pair of wall members 32 facing each other, and an inner wall space 33 is formed between the wall members 32 .

A first floor part 35 and a first floor ceiling part 36 are provided in the first floor part 12 . The first-floor section 35 is configured with a floor surface material, and an underfloor space 38 is formed below it. The underfloor space 38 is surrounded by a foundation 11 (peripheral foundation). Also, the first-floor ceiling part 36 is configured to have a ceiling surface material.

The second floor part 13 is provided with a second floor part 41 and a second floor ceiling part 42 . The second-floor section 41 is configured with a floor surface member, and an inter-floor space 43 is formed between it and the first-floor ceiling section 36 below. The second-floor ceiling part 42 has a ceiling surface material, and an attic space 45 of the roof part 14 is formed above it.

The building 10 is provided with a central air conditioning system. The configuration of the air conditioning system will be described below.

The air conditioning system includes two air conditioners 51 and 52 . Each of the air conditioners 51 and 52 is a heat pump type device, and can perform cooling operation and heating operation. Further, each of the air conditioners 51 and 52 can perform air blowing operation and dehumidifying operation in addition to cooling and heating operation.

Among the air conditioners 51 and 52, the first air conditioner 51 air-conditions (cools and heats) the rooms 16 to 18 on the first floor portion 12 as objects to be air-conditioned. The second air conditioner 52 air-conditions (cools and heats) the rooms 26 and 27 on the second floor 13 . In this case, the rooms 16 to 18 of the first floor portion 12 are air-conditioned areas of the first air conditioner 51 , and the rooms 26 and 27 of the second floor portion 13 are air-conditioned areas of the second air conditioner 52 . In the following description, the rooms 16 to 18, which are the air-conditioned areas of the first air conditioner 51, are also referred to as first-floor rooms 16 to 18, and the rooms 26 and 27, which are the air-conditioned areas of the second air conditioner 52. They are also called second-floor rooms 26 and 27. Further, in this case, for the first air conditioner 51, the second floor rooms 26 and 27 correspond to "air conditioning areas of other air conditioners", and for the second air conditioner 52, the first floor rooms 16 to 18 correspond to "other air conditioning areas". It corresponds to the "air conditioning area of the air conditioner".

The first air conditioner 51 has an indoor unit 51a and an outdoor unit 51b, and is configured by connecting the indoor unit 51a and the outdoor unit 51b to each other through a refrigerant pipe 51c. The indoor unit 51a is installed in the machine room 19 of the first floor portion 12, and the outdoor unit 51b is installed outdoors. Also, the refrigerant pipe 51c is arranged through the underfloor space 38 and is indicated by a dotted line in FIG. 1 for convenience.

The indoor unit 51a takes in the air in the machine room 19 and adjusts the temperature of the air to generate conditioned air (cold air or warm air). Specifically, the indoor unit 51a incorporates a heat exchanger (not shown), and the heat exchanger is connected to the refrigerant pipe 51c. In the indoor unit 51a, in the heat exchanger, heat is exchanged between the refrigerant flowing inside and the air taken in from the machine room 19, and the temperature of the taken-in air is adjusted by the heat exchange, and the conditioned air (cold air or warm air) is generated.

A heat exchanger (not shown) is incorporated in the outdoor unit 51b as in the indoor unit 51a, and the heat exchanger is connected to the refrigerant pipe 51c. In this case, in the heat exchanger, heat is exchanged between the refrigerant flowing inside and the outdoor air. For example, during the heating operation of the first air conditioner 51, the refrigerant absorbs heat from the outdoor air in the heat exchanger. That is, in this case the heat exchanger is used as an evaporator.

The indoor unit 51 a is connected to an air conditioning chamber 54 installed in the underfloor space 38 . A plurality of air conditioning ducts 55 are connected to the air conditioning chamber 54 . Each of these air conditioning ducts 55 is arranged in the underfloor space 38 and connected to an air outlet 56 provided in the floor section 35 of the first floor. Each of these air outlets 56 is provided in each of the rooms 16 to 18 of the first floor portion 12 . Note that the air conditioning duct 55 corresponds to the first air conditioning duct.

The conditioned air (cold air or warm air) generated by the indoor unit 51a of the first air conditioner 51 is supplied to each air outlet 56 through the air conditioning chamber 54 and each air conditioning duct 55, and the first floor rooms 16 to 18 are supplied from the air outlet 56. is blown out. As a result, each of the first-floor rooms 16 to 18 is cooled or heated by the blown conditioned air.

Like the first air conditioner 51, the second air conditioner 52 has an indoor unit 52a and an outdoor unit 52b, and the indoor unit 52a and the outdoor unit 52b are connected to each other through a refrigerant pipe 52c. It is composed of The indoor unit 52a is installed in the attic space 45 of the roof part 14, and the outdoor unit 52b is installed alongside the outdoor unit 51b of the first air conditioner 51 outdoors. Refrigerant pipes 52c are arranged through the wall spaces 23 and 33 of the partition walls 21 and 31, the inter-floor space 53 and the underfloor space 38, and are indicated by dotted lines in FIG. 1 for convenience.

The indoor unit 52a takes in the air in the attic space 45 and adjusts the temperature of the air to generate conditioned air (cold air or warm air). Specifically, a heat exchanger (not shown) is incorporated in the indoor unit 52a, and the heat exchanger is connected to the refrigerant pipe 52c. In the indoor unit 52a, in the heat exchanger, heat is exchanged between the refrigerant flowing inside and the air taken in from the attic space 45, and the temperature of the taken-in air is adjusted by the heat exchange to produce conditioned air (cold air or warm air) is generated.

A heat exchanger (not shown) is built in the outdoor unit 52b as well as the indoor unit 52a, and the heat exchanger is connected to the refrigerant pipe 52c. In this case, in the heat exchanger, heat is exchanged between the refrigerant flowing inside and the outdoor air. For example, during the heating operation of the second air conditioner 52, the refrigerant absorbs heat from the outdoor air in the heat exchanger. That is, in this case the heat exchanger is used as an evaporator.

The outdoor unit 52 b is connected to an air conditioning chamber 57 installed in the attic space 45 . A plurality of air conditioning ducts 58 are connected to the air conditioning chamber 57 . Each of these air conditioning ducts 58 is arranged in the attic space 45 and connected to an air outlet 59 provided in the second floor ceiling section 42 . Each of these outlets 59 is provided in each of the rooms 26 and 27 of the second floor portion 13 . Note that the air conditioning duct 58 corresponds to the first air conditioning duct.

The conditioned air (cold air or warm air) generated by the indoor unit 52a of the second air conditioner 52 is supplied to each air outlet 59 through the air conditioning chamber 57 and each air conditioning duct 58, and from the air outlet 59 to each second floor room 26, 27. blown out. As a result, the second floor rooms 26 and 27 are cooled or heated by the blown conditioned air.

Here, in the first air conditioner 51 and the second air conditioner 52, the defrosting operation is performed periodically in order to prevent frost from adhering to the heat exchangers of the outdoor units 51b and 52b during the heating operation. It's like In each of the air conditioners 51 and 52, the defrosting start condition for starting the defrosting operation is predetermined, and when the defrosting start condition is met, the operating state is switched from the heating operation to the defrosting operation. there is

During the defrosting operation of the air conditioners 51 and 52, the refrigerant flowing through the refrigerant pipes 51c and 52c (specifically, the refrigerant circuit including the refrigerant pipes 51c and 52c and the heat exchangers of the indoor units 51a and 52a and the outdoor units 51b and 52b) The direction of flow is opposite to that during heating operation. Therefore, the heat exchangers of the outdoor units 51b and 52b are used as evaporators during the heating operation of the air conditioners 51 and 52, while they are used as condensers during the defrosting operation. As a result, during the defrosting operation, the surface temperature of the heat exchangers of the outdoor units 51b and 52b is increased, thereby melting the frost adhering to the heat exchangers.

The defrosting start condition of each air conditioner 51, 52 is defined by the temperature of the refrigerant flowing through the heat exchangers of the outdoor units 51b, 52b. That is, when the temperature of the refrigerant flowing through the heat exchangers of the outdoor units 51b, 52b drops below a predetermined defrosting start temperature, the air conditioners 51, 52 start defrosting operations. Specifically, the outdoor unit 51b of the first air conditioner 51 is provided with a temperature sensor 71 for detecting the temperature of the refrigerant in the heat exchanger, and the outdoor unit 52b of the second air conditioner 52 is provided with a heat exchanger. A temperature sensor 72 is provided to detect the temperature of the refrigerant in the vessel. Then, when the refrigerant temperature detected by the temperature sensor 71 becomes equal to or lower than the defrosting start temperature, defrosting operation is started in the first air conditioner 51, and when the refrigerant temperature detected by the temperature sensor 72 becomes equal to or lower than the defrosting start temperature. , the second air conditioner 52 starts the defrosting operation. In the present embodiment, the defrosting start temperatures of the air conditioners 51 and 52 are the same, and are hereinafter referred to as the defrosting start temperature Ta. Also, the defrosting start temperatures of the air conditioners 51 and 52 may be set to different temperatures.

By the way, in the air conditioning system 50 described above, when the defrosting operation is started in one of the air conditioners 51 and 52, the air conditioner 51 and 52 stops the heating operation. Therefore, in the air-conditioned areas of the air conditioners 51 and 52, the room temperature is expected to drop. Therefore, in view of this point, the air conditioning system 50 has a configuration for supplying the warm air generated by the first air conditioner 51 to the second floor room 27, which is the air conditioning area of the second air conditioner 52, and the second air conditioner 50. and a configuration for supplying the warm air generated by the air conditioner 52 to the first floor rooms 16 and 18, which are the air-conditioned areas of the first air conditioner 51 . These configurations will be described in detail below.

First, a configuration for supplying the warm air generated by the first air conditioner 51 to the room 27 on the second floor will be described.

In addition to the air conditioning duct 55 , a plurality of air conditioning ducts 61 are connected to the air conditioning chamber 54 . Each of these air conditioning ducts 61 extends from the underfloor space 38 to the inter-floor space 43 through the wall space 23 of the partition wall 21 . Each air conditioning duct 61 is connected to an outlet 62 provided in the second floor section 41 . Each of these outlets 62 is provided in the room 27 on the second floor.

According to this configuration, during the heating operation of the first air conditioner 51, warm air generated by the first air conditioner 51 (more specifically, the indoor unit 51a) is supplied to the outlet 62 through the air conditioning chamber 54 and the air conditioning duct 61, and It becomes possible to blow out to the room 27 on the second floor from the exit 62 . Therefore, the first air conditioner 51 can heat the second floor room 27 , which is the air-conditioned area of the second air conditioner 52 . In this case, the air-conditioning duct 61 corresponds to the second air-conditioning duct, and the first air-conditioning device 51 provided with the air-conditioning duct 61 corresponds to the "predetermined air-conditioning device".

Next, the internal configuration of the air conditioning chamber 54 will be described with reference to FIG. FIG. 2 is a cross-sectional view showing the internal configuration of the air conditioning chamber 54. As shown in FIG.

As shown in FIG. 2, the air-conditioning chamber 54 is provided with a duct connection port 54a to which the air-conditioning ducts 55 and 61 are connected. Air conditioning ducts 55 and 61 are connected to these duct connection ports 54a, respectively. The air conditioning chamber 54 is also provided with an indoor unit connection port 54b connected to the indoor unit 51a of the first air conditioner 51 .

The air-conditioning chamber 54 is provided with an opening/closing device 63 for opening and closing the duct connection port 54a for each duct connection port 54a. The opening/closing device 63 is configured as, for example, a damper device. The opening/closing device 63 has an opening/closing plate 63a rotatably supported by the air-conditioning chamber 54, and a driving portion 63b (see FIG. 3) that rotationally drives the opening/closing plate 63a. In the opening/closing device 63, the duct connection port 54a is opened and closed by the opening/closing plate 63a that is rotationally driven by the driving portion 63b.

Here, each duct connection port 54a includes a duct connection port 54a to which the air conditioning duct 55 is connected and a duct connection port 54a to which the air conditioning duct 61 is connected. In the following description, A is attached to the opening/closing device 63 provided for the former duct connection port 54a, and B is attached to the opening/closing device 63 provided for the latter duct connection port 54a. Further, in FIG. 2, the opening/closing plate 63a of the opening/closing device 63B is hatched with dots in order to make it easier to distinguish between the opening/closing devices 63A and 63B.

According to the above configuration, when the duct connection port 54a is opened by each opening/closing device 63A (opening/closing plate 63a) during the heating operation of the first air conditioner 51, the air generated by the indoor unit 51a of the first air conditioner 51 Warm air flows from the indoor unit 51a through the air-conditioning chamber 54 into each air-conditioning duct 55 (see arrows in FIG. 2). Then, the warm air that has flowed in is supplied to each of the first floor rooms 16 to 18 through each air conditioning duct 55 . Therefore, in this case, the first floor rooms 16 to 18 are heated by the warm air.

On the other hand, when the duct connection port 54a is closed by each opening/closing device 63A, warm air is prohibited from flowing from the air conditioning chamber 54 to each air conditioning duct 55, and thus warm air is supplied to each first floor room 16 to 18 through each air conditioning duct 55. is prohibited. Therefore, in this case, the first floor rooms 16 to 18 are not heated. In this way, by opening and closing each opening/closing device 63A, it is possible to switch whether to supply warm air to each of the first-floor rooms 16 to 18, that is, to switch whether to heat each of the first-floor rooms 16 to 18. It's becoming In this case, each opening/closing device 63A corresponds to the second switching means.

Further, during the heating operation of the first air conditioner 51, when the duct connection port 54a is opened by each opening/closing device 63B (opening/closing plate 63a), warm air generated by the indoor unit 51a of the first air conditioner 51 From 51 a , it flows into each air conditioning duct 61 via the air conditioning chamber 54 . Then, the warm air that has flowed in is supplied to the second floor room 27 through each air conditioning duct 61 . Therefore, in this case, the room 27 on the second floor is heated by the warm air.

On the other hand, when the opening/closing device 63B closes the duct connection port 54a, the warm air is prohibited from flowing from the air-conditioning chamber 54 to each air-conditioning duct 61, and thus the warm air is prevented from being supplied to the second floor room 27 through each air-conditioning duct 61. It is forbidden. Therefore, in this case, the room 27 on the second floor is not heated. In this way, by opening and closing each opening/closing device 63B, it is possible to switch whether warm air is supplied to the room 27 on the second floor, that is, whether to heat the room 27 on the second floor. In this case, each switching device 63B corresponds to switching means and first switching means.

Next, a configuration for supplying the warm air generated by the second air conditioner 52 to the rooms 16 and 18 on the first floor will be described.

As shown in FIG. 1 , in addition to the air conditioning duct 58 , a plurality of air conditioning ducts 66 are connected to the air conditioning chamber 57 . Each of these air conditioning ducts 66 extends from the attic space 45 to the inter-floor space 43 through the wall space 33 of the partition wall 31 . Each air conditioning duct 66 is connected to an air outlet 67 provided in the first floor ceiling section 36 . These outlets 67 are provided in the rooms 16 and 18 on the first floor.

According to this configuration, during the heating operation of the second air conditioner 52, the warm air generated by the second air conditioner 52 (more specifically, the indoor unit 52a) is supplied to the air outlet 67 through the air conditioning chamber 57 and the air conditioning duct 66, and the air outlet 67 is supplied. Air can be blown out from the exit 67 to the rooms 16 and 18 on the first floor. Therefore, it is possible to heat the rooms 16 and 18 on the first floor with the warm air. In this case, the air-conditioning duct 66 corresponds to the second air-conditioning duct, and the second air-conditioning device 52 provided with the air-conditioning duct 66 corresponds to the "predetermined air-conditioning device".

Although not shown, the air-conditioning chamber 57 is provided with a structure similar to that of the air-conditioning chamber 54 (see FIG. 2). That is, inside the air-conditioning chamber 57, a plurality of opening/closing devices 68 (see FIG. 3) are provided corresponding to the air-conditioning ducts 58 and 66, respectively. Among the opening/closing devices 68 , the opening/closing device 68 A is provided corresponding to the air conditioning duct 58 , and the opening/closing device 68 B is provided corresponding to the air conditioning duct 66 .

In this case, during the heating operation of the second air conditioner 52, whether or not the warm air generated by the indoor unit 52a of the second air conditioner 52 is supplied to the second floor rooms 26 and 27 through the air conditioning duct 58 by opening and closing each opening/closing device 68A. It is possible to switch between In other words, it is possible to switch whether to heat the rooms 26 and 27 on the second floor. In this case, each opening/closing device 68A corresponds to the second switching means.

Also, during the heating operation of the second air conditioner 52, whether or not the warm air generated by the indoor unit 52a of the second air conditioner 52 is supplied to the first floor rooms 16 and 18 through the air conditioning duct 66 by opening and closing each opening/closing device 68B. It is possible to switch between In other words, it is possible to switch whether to heat the rooms 16 and 18 on the first floor. In this case, each switching device 68B corresponds to switching means and first switching means.

Next, the electrical configuration of the air conditioning system 50 will be described with reference to FIG. FIG. 3 is a diagram showing the electrical configuration of the air conditioning system 50. As shown in FIG.

As shown in FIG. 3, the air conditioning system 50 includes a controller 70 as control means. The controller 70 is mainly composed of a well-known microcomputer having a CPU, etc., and is provided on the wall surface of the machine room 19, for example. Further, the controller 70 has a storage section 70a. The operating state of each of the air conditioners 51 and 52 is stored in the storage section 70a.

Temperature sensors 71 and 72 are connected to the controller 70 . The controller 70 is sequentially input with detection results from these temperature sensors 71 and 72 .

The controller 70 is also connected to the air conditioners 51 and 52 and to the opening/closing devices 63 and 68 . Based on the detection results from the temperature sensors 71 and 72, the controller 70 controls the operation of the air conditioners 51 and 52 and controls the opening and closing of the opening/closing devices 63 and 68. FIG.

Next, the heating control process executed by the controller 70 will be described with reference to FIG. FIG. 4 is a flowchart showing heating control processing. Note that this process is repeatedly executed at a predetermined cycle.

As shown in FIG. 4, first, in step S11, it is determined whether or not the first air conditioner 51 is in heating operation. If the first air conditioner 51 is not in the heating operation, for example, if the first air conditioner 51 is not operating, or is performing an operation other than the heating operation such as the air blowing operation or the dehumidifying operation, the process proceeds to step S13. move on. On the other hand, when the first air conditioner 51 is in heating operation, the process proceeds to step S12.

In step S12, based on the detection result from the temperature sensor 71, it is determined whether or not the defrosting start condition for the first air conditioner 51 is about to be satisfied (corresponding to determination means). This determination is made based on, for example, whether the temperature of the refrigerant in the outdoor unit 51b (heat exchanger) detected by the temperature sensor 71 has decreased to a pre-defrosting temperature that is higher than the defrosting start temperature Ta by a predetermined temperature. When the refrigerant temperature of the outdoor unit 51b has decreased to the pre-defrosting temperature, it is determined that the defrosting start condition for the first air conditioner 51 is about to be satisfied, and the process proceeds to step S16.

In step S16, a first defrosting operation process is performed. This process is for supplying warm air generated by the second air conditioner 52 through the air conditioning duct 66 to the first floor rooms 16 and 18, which are the air-conditioned areas of the first air conditioner 51, where the defrosting start condition is about to be satisfied. processing. After performing the first defrosting operation process, the process ends.

In step S12, if the defrosting start condition for the first air conditioner 51 is not about to be satisfied, the process proceeds to step S13. In step S13, it is determined whether or not the second air conditioner 52 is in heating operation. If the second air conditioner 52 is not in the heating operation, the process ends, and if the second air conditioner 52 is in the heating operation, the process proceeds to step S14.

In step S14, based on the detection result from the temperature sensor 72, it is determined whether or not the defrosting start condition for the second air conditioner 52 is about to be satisfied (corresponding to determination means). This determination is made, for example, based on whether the temperature of the refrigerant in the outdoor unit 52b (heat exchanger) detected by the temperature sensor 72 has decreased to a pre-defrosting temperature that is higher than the defrosting starting temperature Ta by a predetermined temperature. When the refrigerant temperature of the outdoor unit 52b has decreased to the pre-defrosting temperature, it is determined that the defrosting start condition for the second air conditioner 52 is about to be satisfied, and the process proceeds to step S15. On the other hand, if the temperature of the refrigerant in the outdoor unit 52b has not decreased to the pre-defrosting temperature, it is determined that the defrosting start condition for the second air conditioner 52 is not approaching, and this process ends.

In step S15, a second defrosting operation process is performed. This processing is processing for supplying warm air generated by the first air conditioner 51 through the air conditioning duct 61 to the second floor room 27, which is the air-conditioned area of the second air conditioner 52 in which the defrosting start condition is about to be satisfied. . After performing the second defrosting operation process, the process ends.

Then, the process at the time of the 2nd defrost operation of step S15 is demonstrated among the processes at the time of each defrost operation of steps S15 and S16. FIG. 5 is a flowchart showing the second defrosting operation process. This processing will be described below based on FIG. In addition, since the process at the time of the 1st defrost operation of step S16 is fundamentally the same as the process at the time of the 2nd defrost operation, and the content of a process, suppose that the description is omitted.

As shown in FIG. 5, first, in step S21, it is determined whether or not the first air conditioner 51 is in heating operation. If the first air conditioner 51 is in heating operation, the process proceeds to step S25, and if the first air conditioner 51 is not in heating operation, that is, in an operating state (non-heating operation state) different from heating operation, Proceed to step S22.

In step S22, the operating state of the first air conditioner 51 is stored in the storage section 70a. When the first air conditioner 51 is not in the heating operation, it is considered that the first air conditioner 51 is in the fan operation state, the dehumidification operation state, or the operation stop state. Therefore, in this step, the storage unit 70a stores which state the first air conditioner 51 is in among these operating states (non-heating operating state).

In step S23, the heating operation of the first air conditioner 51 is executed. Thereby, warm air is generated by the indoor unit 51 a of the first air conditioner 51 .

In the following step S24, the opening/closing plate 63a is closed by driving the driving portion 63b of each opening/closing device 63A. This prohibits the warm air generated by the indoor unit 51a of the first air conditioner 51 from being supplied to the rooms 16 to 18 on the first floor through the air conditioning duct 55. FIG. That is, in this case, the warm air generated by the first air conditioner 51 is prohibited from being supplied to the rooms 16 to 18 on the first floor, which are the air-conditioned areas of the first air conditioner 51 .

In step S25, the opening/closing plate 63a of each opening/closing device 63B is opened by driving the driving portion 63b. As a result, second floor room air supply processing (corresponding to other area air supply processing) in which warm air generated by the indoor unit 51a of the first air conditioner 51 is supplied to the second floor room 27 through the air conditioning duct 61 is performed (started). ). In this case, the warm air generated by the first air conditioner 51 is supplied to the second floor room 27 , which is the air-conditioned area of the second air conditioner 52 .

In step S26, the defrosting operation period during which the second air conditioner 52 is to be defrosted is predicted. Specifically, the period from the start of operation when the second air conditioner 52 starts the defrosting operation when the defrosting start condition is satisfied to the end of the operation when the defrosting operation ends (defrosting operation period ). This prediction is made based on the refrigerant temperature of the outdoor unit 52b detected by the temperature sensor 72, for example.

In step S27, the defrosting operation start timing at which the defrosting operation of the first air conditioner 51 is started is predicted. This prediction is made based on the refrigerant temperature of the outdoor unit 51b detected by the temperature sensor 71, for example.

In step S28, based on the prediction results of steps S26 and S27, the defrosting operation of the first air conditioner 51 is started during the defrosting operation of the second air conditioner 52, which is started when the defrosting start condition is satisfied. determines (predicts) whether or not there is a possibility of When there is no possibility that the defrosting operation of the first air conditioner 51 is started during the defrosting operation of the second air conditioner 52, the process proceeds to step S29.

In step S29, based on the refrigerant temperature of the outdoor unit 52b detected by the temperature sensor 72, it is determined whether or not the defrosting start condition of the second air conditioner 52 is satisfied. That is, in this case, it is determined whether or not the refrigerant temperature detected by the temperature sensor 72 has decreased to the defrosting start temperature Ta. When the defrosting start condition of the second air conditioner 52 is satisfied, the process proceeds to step S30, and the defrosting operation of the second air conditioner 52 is executed. As a result, the second air conditioner 52 switches from the heating operation state to the defrosting operation state. On the other hand, if the defrosting start condition for the second air conditioner 52 is not met, the process of step S29 is repeated until the defrosting start condition is met.

In the previous step S28, if there is a possibility that the defrosting operation of the first air conditioner 51 is started during the defrosting operation of the second air conditioner 52, the process proceeds to step S30, and the defrosting of the second air conditioner 52 is performed. Frost operation should be carried out immediately. In this case, the defrosting operation of the second air conditioner 52 is started without waiting for the defrosting start condition of the second air conditioner 52 to be satisfied.

In step S31, based on the refrigerant temperature of the outdoor unit 52b detected by the temperature sensor 72, it is determined whether or not the defrosting end condition of the second air conditioner 52 is satisfied. For example, when the refrigerant temperature of the outdoor unit 52b becomes equal to or higher than a predetermined defrosting end temperature, it is determined that the defrosting end condition is met. In this step, it is repeatedly determined whether or not the defrosting end condition is satisfied until the defrosting end condition is satisfied. Then, when the defrosting end condition is established, the process proceeds to step S32.

In step S32, the heating operation of the second air conditioner 52 is executed. As a result, the second air conditioner 52 switches from the defrosting operation state to the heating operation state.

In step S33, the opening/closing plate 63a is closed by driving the driving portion 63b of each opening/closing device 63B. This prohibits the warm air generated by the first air conditioner 51 (the indoor unit 51 a ) from being supplied to the room 27 on the second floor through the air conditioning duct 61 . That is, as a result, the air supply process for the second floor room started in step S25 ends.

In step S34, it is determined whether or not the first air conditioner 51 was in heating operation before the second floor room air supply process was started (before step S25). This determination is made based on the determination result of step S21. If the first air conditioner 51 is in the heating operation, the process ends. When the first air conditioner 51 is not in the heating operation, that is, when the first air conditioner 51 is in the non-heating operation state different from the heating operation, the process proceeds to step S35.

In step S35, a process of returning the first air conditioner 51 to the operating state (non-heating operating state) before the start of the second floor room air supply process is performed. In this process, the operating state of the first air conditioner 51 is returned to the operating state (non-heating operating state) stored in the storage unit 40a. As a result, the first air conditioner 51 switches from the heating operation state to the non-heating operation state. When the operation state of the first air conditioner 51 is returned to the dehumidification operation state or the ventilation operation state, the opening/closing plate 63a of each opening/closing device 63A is opened, and the air conditioning generated by the same device 51 (indoor unit 51a) Air (dehumidified air or blast air) is supplied to the first floor rooms 16 to 18 through the air conditioning duct 55 . After that, this process is terminated.

According to the configuration of the present embodiment described in detail above, the following excellent effects are obtained.

The air conditioning system 50 is composed of a first air conditioner 51 for air conditioning the first floor rooms 16 to 18 (corresponding to the air conditioning area) and a second air conditioner 52 for air conditioning the second floor rooms 26 and 27 (corresponding to the air conditioning area). The warm air generated by the first air conditioner 51 is supplied to the first floor rooms 16 to 18 through the air conditioning duct 55, and the warm air generated by the second air conditioner 52 is supplied to the second floor room through the air conditioning duct 58. 26 and 27. As a result, the respective air-conditioned areas (specifically, the first floor rooms 16 to 18 and the second floor rooms 26 and 27) are heated by the air conditioners 51 and 52, respectively.

In this air conditioning system 50, in addition to the air conditioning duct 55, an air conditioning duct 61 is provided for the first air conditioning device 51, and warm air generated by the first air conditioning device 51 is passed through the air conditioning duct 61 to the second air conditioning system. It is made possible to supply to the second floor room 27 which is the air-conditioned area of the air conditioner 52 . In addition, it is possible to switch whether to supply the warm air generated by the first air conditioner 51 to the room 27 on the second floor by opening and closing the opening/closing device 63B. In this case, during the defrosting operation of the second air conditioner 52, by switching to supply warm air from the first air conditioner 51 to the room 27 on the second floor, it is possible to suppress the room temperature of the room 27 on the second floor from decreasing. .

Similarly, for the second air conditioner 52, in addition to the air conditioning duct 58, an air conditioning duct 66 is provided, and the warm air generated by the second air conditioner 52 passes through the air conditioning duct 66 to the first air conditioner 51. It is made possible to supply to the rooms 16 and 18 on the first floor, which are air-conditioned areas. In addition, it is possible to switch whether to supply warm air generated by the second air conditioner 52 to the rooms 16 and 18 on the first floor by opening and closing the opening/closing device 68B. In this case, during the defrosting operation of the first air conditioner 51, the room temperature of the first floor rooms 16 and 18 is lowered by switching to supply warm air from the second air conditioner 52 to the first floor rooms 16 and 18. can be suppressed.

As described above, according to the air conditioning system 50, even if any one of the air conditioners 51 and 52 starts the defrosting operation during its heating operation (that is, the heating operation starts with the start of the defrosting operation). even if it is temporarily stopped), it is possible to suppress the room temperature from decreasing.

Further, in the air conditioning system 50, the first defrosting operation processing (step S16) performed during the defrosting operation of the first air conditioner 51 and the second defrosting operation performed during the defrosting operation of the second air conditioner 52 By the time processing (step S15), an excellent effect can be obtained. As described above, these processes during defrosting operation are basically the same processes, and therefore, the effects obtained by these processes during defrosting operation are also basically the same. Therefore, in the following, among the processes during defrosting operation, the effects of the second defrosting operation process will be described, and the explanation of the effects of the first defrosting operation process will be omitted. do.

During the defrosting operation of the second air conditioner 52 (corresponding to another air conditioner), the warm air generated by the first air conditioner 51 (corresponding to a predetermined air conditioner) is removed by opening and closing the opening/closing device 63B. Second-floor room air supply processing (corresponding to other area air supply processing) for supplying air to the second-floor room 27, which is the air-conditioned area of the second air conditioner 52, is performed. As a result, it is possible to suitably suppress a decrease in the room temperature of the second floor room 27 due to the defrosting operation of the second air conditioner 52 .

When the defrosting start condition of the second air conditioner 52 is about to be satisfied, the process of supplying air to the second floor room is started. In this case, warm air is supplied from the first air conditioner 51 to the second floor room 27 before the defrosting operation of the second air conditioner 52 is started. A decrease in room temperature can be further suppressed.

When the defrosting start condition of the second air conditioner 52 is about to be satisfied, the defrosting operation of the first air conditioner 51 is started during the defrosting operation of the second air conditioner 52 that is started when the condition is satisfied. I tried to predict whether it is possible or not. As a result of the prediction, if there is a possibility of starting the defrosting operation, the defrosting operation of the second air conditioner 52 is started immediately. That is, the defrosting operation of the second air conditioner 52 is immediately started without waiting for the defrosting start condition of the second air conditioner 52 to be satisfied. As a result, while the defrosting operation of the second air conditioner 52 is being performed, the defrosting operation of the first air conditioner 51 is started, and a situation occurs in which warm air cannot be supplied from the first air conditioner 51 to the room 27 on the second floor. can be avoided. Therefore, it is possible to reliably prevent the room temperature from decreasing due to the defrosting operation of the second air conditioner 52 .

If the first air conditioner 51 is in an operating state (non-heating operation state) different from the heating operation before performing the second floor room air supply process, the heating operation of the first air conditioner 51 is performed, and then the second floor room is supplied. I tried to do air treatment. After the air supply process for the second floor room is completed, the first air conditioner 51 is returned to the operating state (non-heating operation state) before the air supply process for the second floor room is performed. As a result, when the first air conditioner 51 is in the non-heating operation state before the air supply process for the second floor room, the first air conditioner 51 is temporarily shifted to the heating operation when performing the air supply process for the second floor room. It is possible to avoid a large influence on the rooms 16 to 18 on the first floor, which are the air-conditioned areas of the device 51, just by doing so.

If the first air conditioner 51 is in an operating state (non-heating operation state) different from the heating operation before performing the second-floor room air supply process, the heating operation of the first air conditioner 51 is performed, and the heating operation The opening/closing device 63A is controlled to open/close so that the generated warm air is not supplied to the rooms 16 to 18 on the first floor, which are the air-conditioned areas of the first air conditioner 51. In this case, since the warm air generated by the first air conditioner 51 is supplied only to the second-floor room 27 during the second-floor room air supply process, the temperature drop of the second-floor room 27 can be further suppressed.

The present invention is not limited to the above embodiments, and may be implemented as follows, for example.

(1) In the above embodiment, the air conditioning duct 61 (corresponding to the second air conditioning duct) for supplying the warm air generated by the first air conditioning device 51 to the second floor room 27, which is the air conditioning area of the second air conditioning device 52; An air conditioning duct 66 (corresponding to a second air conditioning duct) for supplying the warm air generated by the second air conditioning device 52 to the first floor rooms 16 and 18, which are the air conditioning areas of the first air conditioning device 51, is provided. Only one of these air conditioning ducts 61 and 66 may be provided.

(2) In the above embodiment, a plurality of air conditioning ducts 61 are provided to supply the warm air generated by the first air conditioning device 51 to the air conditioning area (second floor room 27) of the second air conditioning device 52. You may make it provide only one. Similarly, in the above embodiment, a plurality of air conditioning ducts 66 are provided to supply the warm air generated by the second air conditioner 52 to the air conditioning areas (first floor rooms 16 and 18) of the first air conditioner 51. Only one air conditioning duct 66 may be provided.

(3) In the above embodiment, the second floor room air supply process is automatically performed by the controller 70 during the defrosting operation of the second air conditioner 52. The air supply process for the second floor room may be performed based on this.

(4) Incidentally, the temporary suspension of the heating operation of the second air conditioner 52 is not necessarily limited to the start of the defrosting operation. For example, during the heating operation of the second air conditioner 52, the heating operation may be stopped by automatically starting the cleaning mode due to accumulation of dirt on the filter or the like. Therefore, when the second air conditioner 52 starts operating in such a mode, the process of supplying warm air generated by the first air conditioner 51 to the second floor room 27, which is the air-conditioned area of the second air conditioner 52 (second floor room supply air treatment) may be performed. Even in this case, it is possible to prevent the room temperature from decreasing due to the temporary suspension of the heating operation of the air conditioner.

(5) In the above embodiment, the case where the present invention is applied to the air conditioning system 50 including two air conditioners 51 and 52 has been described, but the present invention may be applied to an air conditioning system including three or more air conditioners. good. For example, when the present invention is applied to an air-conditioning system having three air-conditioners, in such an air-conditioning system, the three air-conditioners perform air-conditioning on air-conditioned areas set so as not to overlap with each other. It is a thing. In such a configuration, for at least one of the three air conditioners (hereinafter referred to as a predetermined air conditioner), the warm air generated by the air conditioner is different from the air conditioner. An air-conditioning duct (corresponding to a second air-conditioning duct) is provided for supplying air to the air-conditioned areas of other air conditioners. Also in this case, during the defrosting operation of the other air conditioner, the warm air generated by the predetermined air conditioner can be supplied to the air-conditioned area of the other air conditioner through the air conditioning duct. Therefore, it is possible to suppress a decrease in room temperature due to the defrosting operation.

(6) Regarding the air conditioning duct 61 that supplies the warm air generated by the first air conditioner 51 to the second floor room and the air conditioning duct 66 that supplies the warm air generated by the second air conditioner 52 to the first floor room, The routing within the building 10 may be different from that of the above embodiment. An example of such a case will be described with reference to FIG.

First, the air conditioning duct for supplying warm air from the first air conditioner 51 to the rooms on the second floor will be described. In the example of FIG. 6, instead of the air conditioning duct 61, an air conditioning duct 81 is connected to the air conditioning chamber 54 on the first air conditioner 51 side. The air conditioning duct 81 extends from the underfloor space 38 through the wall space 23 of the first floor portion 12 to the inter-floor space 43, and extends from the inter-floor space 43 through the wall space 33 of the second floor portion 13 to the attic space 45. there is The air conditioning duct 81 is connected to an air outlet 82 provided in the ceiling of the room 26 on the second floor. In this case, during the defrosting operation of the second air conditioner 52, the warm air generated by the first air conditioner 51 (more specifically, the indoor unit 51a) is supplied to the second floor room 26 via the air conditioning duct 81 and the outlet 82. becomes possible. Therefore, it is possible to prevent the room temperature of the second floor room 26 from dropping during the defrosting operation of the second air conditioner 52 .

In addition, in the example of FIG. 6 , in addition to the air conditioning duct 81 , an air conditioning duct 83 connected to the air conditioning chamber 57 on the side of the second air conditioner 52 is connected to the outlet 82 . In this case, the warm air generated by the second air conditioner 52 (the indoor unit 52 a ) can be supplied to the room 26 on the second floor via the air conditioning duct 83 and the outlet 82 . In such a configuration, the outlet 82 is used not only as an outlet for warm air generated by the first air conditioner 51 but also as an outlet for warm air generated by the second air conditioner 52 . Therefore, compared with the case where the outlet on the first air conditioner 51 side and the outlet on the second air conditioner 52 side are separately provided, the number of outlets can be reduced, and effects such as cost reduction can be obtained. can.

Next, the air conditioning duct for supplying warm air from the second air conditioner 52 to the rooms on the first floor will be described. In the example of FIG. 6, instead of the air conditioning duct 66, an air conditioning duct 85 is connected to the air conditioning chamber 57 on the second air conditioner 52 side. The air conditioning duct 85 extends from the attic space 45 through the wall space 33 of the second floor portion 13 to the inter-floor space 43, and from the inter-floor space 43 through the wall space 23 of the first floor portion 12 to the underfloor space 38. . The air conditioning duct 85 is connected to the air outlet 56 provided in the floor of the room 18 on the first floor. In this case, during the defrosting operation of the first air conditioner 51, the warm air generated by the second air conditioner 52 (more specifically, the indoor unit 52a) is supplied to the first floor room 18 via the air conditioning duct 85 and the outlet 56. becomes possible. Therefore, it is possible to prevent the room temperature of the first floor room 18 from dropping during the defrosting operation of the first air conditioner 51 .

In addition to the air-conditioning duct 85, the air-conditioning duct 55 on the side of the first air conditioner 51 is connected to the air outlet 56. As shown in FIG. Therefore, the outlets 56 are used as outlets for the warm air generated by the air conditioners 51 and 52, respectively. As a result, as in the case of the outlet 82 described above, the number of outlets can be reduced, and effects such as cost reduction can be obtained.

(7) In the above embodiment, the case where the air-conditioning system 50 of the present invention is applied to the two-story building 10 has been described, but the air-conditioning system of the present invention may be applied to a one-storied building, for example. An example of such a case will be described with reference to FIG. As shown in FIG. 7, the building 90 is a one-storied building, and its indoor space is divided into two by a partition wall 91 as a whole. The two spaces partitioned by the partition wall 91 are a first space portion 93 and a second space portion 94 . The main building 90 is, for example, a two-family house, with a first space 93 being a living space for a child household (first household) and a second space 94 being a living space for a parent household (second household).

The first space portion 93 has a plurality of rooms 93a to 93c, and the room 93c of these rooms 93a to 93c serves as a machine room 93c. Similarly, the second space portion 94 has a plurality of rooms 94a to 94c, and the room 94c of these rooms 94a to 94c serves as a machine room 94c. An underfloor space 96 is provided under the floors of the first space 93 and the second space 94 .

The air-conditioning system 100 air-conditions a first space 93 (specifically, rooms 93a and 93b) and a second space 94 (specifically, rooms 94a and 94b). and a second air conditioner 102 . Each of these air conditioners 101 and 102 has indoor units 101a and 102a and outdoor units 101b and 102b, and these indoor units 101a and 102a and outdoor units 101b and 102b are connected to each other through refrigerant pipes 101c and 102c. It is configured by being

The indoor unit 101 a of the first air conditioner 101 is installed in the machine room 93 c , and a plurality of air conditioning ducts 105 are connected to the indoor unit 101 a through the air conditioning chamber 104 . These air conditioning chamber 104 and air conditioning duct 105 are installed in the underfloor space 96 . Each air conditioning duct 105 is connected to an outlet 107 provided on the floor of each room 93a, 93b. As a result, during the heating operation of the first air conditioner 101, the warm air generated by the indoor unit 101a is supplied to the rooms 93a and 93b through the air conditioning ducts 105 and the air outlets 107, and the rooms 93a and 93b are heated. of heating is to take place.

The indoor unit 102 a of the second air conditioner 102 is installed in the machine room 94 c , and a plurality of air conditioning ducts 115 are connected to the indoor unit 102 a through the air conditioning chamber 114 . These air conditioning chamber 114 and air conditioning duct 115 are installed in the underfloor space 96 . Each air conditioning duct 115 is connected to an outlet 117 provided on the floor of each room 94a, 94b. As a result, during the heating operation of the second air conditioner 102, the warm air generated by the indoor unit 102a is supplied to the rooms 94a and 94b through the air conditioning ducts 115 and the outlets 117, and the rooms 94a and 94b are heated. of heating is to take place.

Further, in the air conditioning system 100 , an air conditioning duct 106 is connected in addition to the air conditioning duct 105 to the air conditioning chamber 104 on the first air conditioner 101 side. The air-conditioning duct 106 is connected to an air outlet 108 provided in the floor of the room 94 a of the second space 94 . As a result, during the defrosting operation of the second air conditioner 102, warm air generated by the first air conditioner 101 can be supplied to the room 94a of the second space 94 via the air conditioning duct 106 and the outlet 108. It's becoming Therefore, it is possible to prevent the room temperature of the room 94a from decreasing during the defrosting operation of the second air conditioner 102 .

Similarly, an air conditioning duct 116 in addition to an air conditioning duct 115 is connected to the air conditioning chamber 114 on the side of the second air conditioner 102 . The air-conditioning duct 116 is connected to an air outlet 118 provided in the floor of the room 93 b of the first space 93 . As a result, during the defrosting operation of the first air conditioner 101, warm air generated by the second air conditioner 102 can be supplied to the room 93b of the first space 93 via the air conditioning duct 116 and the outlet 108. It's becoming Therefore, it is possible to prevent the room temperature of the room 93b from decreasing during the defrosting operation of the first air conditioner 101 .

DESCRIPTION OF SYMBOLS 10... Building 16-18... 1st-floor room as an air-conditioning area 26, 27... 2nd-floor room as an air-conditioning area 50... Air-conditioning system 51... First air-conditioning apparatus as an air-conditioning apparatus 51a... Indoor unit 51b... Outdoor unit 52 Second air conditioner as air conditioner 52a Indoor unit 52b Outdoor unit 55 Air conditioning duct as first air conditioning duct 58 Air conditioning duct as first air conditioning duct 61 Second Air-conditioning duct as an air-conditioning duct 63A... Switching device as second switching means 63B... Switching device as switching means and first switching means 66... Air-conditioning duct as second air-conditioning duct 70... Controller as control means .

Claims (7)

A plurality of air conditioners having an indoor unit and an outdoor unit and capable of at least heating operation,
Each of the air conditioners is an air conditioning system for a building that performs air conditioning for each air conditioning area that is set so as not to overlap each other in the building,
a first air conditioning duct provided for each air conditioner for supplying warm air generated by the heating operation of the air conditioner to the air conditioned area of the air conditioner;
A second air conditioner provided for a predetermined air conditioner among the air conditioners for supplying warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner different from the predetermined air conditioner 2 air conditioning ducts;
switching means for switching whether to supply the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner through the second air-conditioning duct;
a control means for controlling the switching means according to the operating state of the other air conditioner;
with
The other air conditioner and the predetermined air conditioner start defrosting operation when a predetermined defrosting start condition is satisfied during heating operation,
The control means performs the switching to perform the other area air supply process of supplying the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner during the defrosting operation of the other air conditioner. control means,
determination means for determining that the defrosting start condition is about to be met for the other air conditioner;
When it is determined that the defrosting start condition for the other air conditioner is about to be satisfied, the predetermined air conditioner is in a defrosting operation of the other air conditioner that is started when the defrosting start condition is satisfied. Prediction means for predicting whether there is a possibility that the defrosting operation of
When the predicting means predicts that the defrosting operation of the predetermined air conditioner may be started during the defrosting operation of the other air conditioner, the control means controls the operation of the other air conditioner. An air-conditioning system for a building, characterized in that the defrosting operation of the building is started immediately . A plurality of air conditioners having an indoor unit and an outdoor unit and capable of at least heating operation,
Each of the air conditioners is an air conditioning system for a building that performs air conditioning for each air conditioning area that is set so as not to overlap each other in the building,
a first air conditioning duct provided for each air conditioner for supplying warm air generated by the heating operation of the air conditioner to the air conditioned area of the air conditioner;
A second air conditioner provided for a predetermined air conditioner among the air conditioners for supplying warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner different from the predetermined air conditioner 2 air conditioning ducts;
switching means for switching whether to supply the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner through the second air-conditioning duct;
a control means for controlling the switching means according to the operating state of the other air conditioner;
with
The other air conditioner starts the defrosting operation when a predetermined defrosting start condition is satisfied during the heating operation,
The control means performs the switching to perform the other area air supply process of supplying the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner during the defrosting operation of the other air conditioner. control means,
Further, if the predetermined air conditioner is in a non-heating operation state different from the heating operation before performing the other area air supply process, the control means causes the predetermined air conditioner to perform the heating operation, An air-conditioning system for a building, wherein the predetermined air-conditioning device is returned to the non-heating operation state after the end of the other area air supply process . A plurality of air conditioners having an indoor unit and an outdoor unit and capable of at least heating operation,
Each of the air conditioners is an air conditioning system for a building that performs air conditioning for each air conditioning area that is set so as not to overlap each other in the building,
a first air conditioning duct provided for each air conditioner for supplying warm air generated by the heating operation of the air conditioner to the air conditioned area of the air conditioner;
A second air conditioner provided for a predetermined air conditioner among the air conditioners for supplying warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner different from the predetermined air conditioner 2 air conditioning ducts;
switching means for switching whether to supply the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner through the second air-conditioning duct;
a control means for controlling the switching means according to the operating state of the other air conditioner;
with
The other air conditioner starts the defrosting operation when a predetermined defrosting start condition is satisfied during the heating operation,
The control means performs the switching to perform the other area air supply process of supplying the warm air generated by the predetermined air conditioner to the air-conditioned area of the other air conditioner during the defrosting operation of the other air conditioner. control means,
In addition to first switching means as the switching means, second switching means for switching whether to supply warm air generated by the predetermined air conditioner to the air-conditioned area of the predetermined air conditioner through the first air conditioning duct. with
When the predetermined air conditioner is in an operating state different from the heating operation before the other area air supply process is performed, the control means causes the predetermined air conditioner to perform the heating operation, and also causes the predetermined air conditioner to perform the heating operation. A building air-conditioning system , wherein the second switching means is controlled such that the warm air generated by the air conditioning unit is not supplied to the air-conditioned area of the predetermined air conditioner. If the predetermined air conditioner is in a non-heating operation state different from a heating operation before performing the other area air supply process, the control means causes the predetermined air conditioner to perform a heating operation,
2. The building air-conditioning system according to claim 1 , wherein said predetermined air-conditioning device is returned to said non-heating operation state after completion of said other area air supply process. In addition to first switching means as the switching means, second switching means for switching whether to supply warm air generated by the predetermined air conditioner to the air-conditioned area of the predetermined air conditioner through the first air conditioning duct. with
If the predetermined air conditioner is in an operating state different from the heating operation before performing the other area air supply process, the control means causes the predetermined air conditioner to perform the heating operation, and also causes the predetermined air conditioner to perform the heating operation. 5. The building air-conditioning system according to claim 1, 2 or 4, wherein the second switching means is controlled so that the warm air generated by the air conditioning unit is not supplied to the air-conditioned area of the predetermined air conditioner. Determining means for determining that the other air conditioner is about to satisfy the defrosting start condition,
3. The control means controls the switching means to start the other area air supply process when it is determined that the defrosting start condition is about to be satisfied for the other air conditioner. A building air conditioning system according to any one of claims 1 to 5 . Each of the air conditioners is the predetermined air conditioner provided with the second air conditioning duct,
7. The building air-conditioning system according to any one of claims 1 to 6, wherein the switching means is provided for each of the second air-conditioning ducts.

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