Entire building air conditioning system

Abstract

To provide an entire building air conditioning system capable of appropriately reducing an amount of electric energy in a situation in which power saving is required in a building.SOLUTION: There is provided an entire building air conditioning device for conditioning air in an air conditioning chamber 14 and conveying the conditioned air in the air conditioning chamber 14 to a plurality of air conditioning object spaces. Power saving processing for the entire building air conditioning device is performed on the basis of a reduction request for reducing use of electric power in which air in the air conditioning chamber 14 is not conveyed to all of the plurality of air conditioning object spaces, but is conveyed only to a specific air conditioning object space after the reduction request, thereby achieving an expected objective.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a central air conditioning system. [Background technology]

[0002] Conventionally, in a highly insulated and airtight house with multiple rooms, there has been known an air conditioning system in which at least one air-conditioned room is provided independently to control the air conditioning within the air-conditioned room, and air supply ducts connect the air-conditioned room to each room, and the conditioned room air is individually distributed and supplied by a controller disposed in each room (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-127845 A Summary of the Invention [Problem to be solved by the invention]

[0004] In situations where power saving is required in buildings such as homes, it is desirable to reduce the amount of electricity used appropriately. In Japan, particularly in the summer and winter, the amount of electricity used for air conditioning accounts for a significant portion of the total amount of electricity used in buildings, so reducing the amount of electricity used for air conditioning is important in situations where power saving is required.

[0005] The present invention has been made to solve the above-mentioned problems, and has an object to provide a central air conditioning system that can appropriately reduce the amount of electricity consumed in a building when power saving is necessary. [Means for solving the problem]

[0006] The present invention is provided with a central air conditioner that conditions the air in an air-conditioned room and transports the conditioned air from the air-conditioned room to multiple air-conditioned spaces, and performs power saving processing for the central air conditioner after a reduction request is made to reduce power usage, so that the air from the air-conditioned room is not transported to all of the multiple air-conditioned spaces, but is transported only to a specific air-conditioned space, thereby achieving the intended purpose. Effect of the Invention

[0007] According to the present invention, it is possible to provide a central air-conditioning system that is capable of appropriately reducing the amount of power consumed in a building when power saving is required. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a system schematic diagram of a central air conditioning system. [Diagram 2] 1 is a schematic functional block diagram of a central air-conditioning system according to a first embodiment. [Diagram 3] FIG. 11 is a schematic functional block diagram of a central air-conditioning system according to a second embodiment. [Figure 4] FIG. 11 is a schematic functional block diagram of a central air-conditioning system according to a third embodiment. [Diagram 5] FIG. 11 is a schematic functional block diagram of a central air-conditioning system according to a fourth embodiment. [Figure 6] FIG. 11 is a schematic functional block diagram of a central air-conditioning system according to a fifth embodiment. [Figure 7] FIG. 13 is a schematic functional block diagram of another example of the central air-conditioning system according to the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the components, the arrangement and connection of the components, and The steps (processes) and the order of steps are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, those components that are not described in the independent claims that show the highest concept of the present invention are described as optional components. In addition, in each drawing, the same reference numerals are given to substantially the same configurations, and duplicated descriptions are omitted or simplified.

[0010] (Embodiment 1) The central air-conditioning system according to the present embodiment will be described below. Fig. 1 is a system schematic diagram of the central air-conditioning system according to the present embodiment.

[0011] The central air-conditioning system includes air outlets 4a to 4d collectively referred to as air outlet 4, transport ducts 15a to 15d collectively referred to as transport duct 15, and a central air-conditioning device. The central air-conditioning device may include the air outlet 4, the transport duct 15, etc. The central air-conditioning device includes, for example, transport fans 3a to 3d collectively referred to as transport fan 3 as a transport unit, room temperature sensors 11a to 11d collectively referred to as room temperature sensor 11, room human presence sensors 12a to 12d collectively referred to as room human presence sensor 12 as a human detection unit, an air-conditioned room temperature sensor 13, an air conditioner 5, and a controller 10. The central air-conditioning device does not necessarily have to include a human detection unit.

[0012] The central air-conditioning system is installed in a house 1, which is an example of a building. The house 1 has a plurality of (four in this embodiment) rooms 2a to 2d collectively referred to as rooms 2, and at least one air-conditioned room 14 that is independent of the rooms 2. Here, a house is a residence provided as a place for residents to live private lives, and the rooms 2 generally include a living room, dining room, bedroom, private room, children's room, etc. Furthermore, the rooms provided by the central air-conditioning system may include a dressing room. Furthermore, the rooms provided by the central air-conditioning system may include a toilet, bathroom, washroom, etc.

[0013] The temperature of the air in the air-conditioned room 14 is controlled by an air conditioner 5 provided in the air-conditioned room 14. The air conditioned in the air-conditioned room 14 is transported to the rooms 2a to 2d by the transport fans 3a to 3d. In other words, the multiple rooms 2 can also be considered multiple spaces to be air-conditioned.

[0014] The transport fan 3 transports the air in the air-conditioned room 14 to the living room 2 independent of the air-conditioned room 14. The transport fans 3a to 3d are provided in the air-conditioned room 14 corresponding to the living rooms 2a to 2d. The air in the air-conditioned room 14 is transported to the living room 2a through the transport duct 15a by the transport fan 3a, to the living room 2b through the transport duct 15b by the transport fan 3b, to the living room 2c through the transport duct 15c by the transport fan 3c, and to the living room 2d through the transport duct 15d by the transport fan 3d. The number and combination of each transport fan, each transport duct, and each living room are not limited to the above, and may be a different combination. In this way, the transport fan 3 (transport unit) transports the air whose temperature has been adjusted by the air conditioner 5 to each of the multiple air-conditioned spaces.

[0015] Air outlet 4a is provided in room 2a, air outlet 4b in room 2b, air outlet 4c in room 2c, and air outlet 4d in room 2d. Air outlet 4 is an opening for blowing out air from air-conditioned room 14 sent by transport fan 3 through transport duct 15. The combination of air outlet 4 and room 2 does not necessarily have to be a pair, and multiple air outlets 4 may be installed for one room 2.

[0016] The room temperature sensors 11 are sensors that obtain the indoor temperatures (room temperatures) of the corresponding rooms 2a to 2d and transmit the obtained temperatures to the controller 10. The room temperature sensor 11a is for the room 2a, the room temperature sensor 11b is for the room 2b, the room temperature sensor 11c is for the room 2c, and the room temperature sensor 11b is for the room 2c. The sensor 11d is provided for the living room 2d. The combination of the living room temperature sensor 11 and the living room 2 does not necessarily have to be a pair, and a plurality of living room temperature sensors 11 may be provided for one living room 2.

[0017] The room human presence sensors 12 are sensors that detect people present in the corresponding rooms 2a to 2d and transmit the detected people to the controller 10. That is, the room human presence sensors 12 detect people in a plurality of air-conditioned spaces as a human detection unit. The room human presence sensor 12a is provided in the room 2a, the room human presence sensor 12b in the room 2b, the room human presence sensor 12c in the room 2c, and the room human presence sensor 12d in the room 2d. In the present embodiment, a human presence sensor is given as an example of the human detection unit, but any other sensor capable of detecting people, such as a camera, a thermosensor, or an ultrasonic sensor, having a human detection function, may be used.

[0018] The air conditioner 5 conditions the air in the air-conditioned room 14 in the house 1, that is, adjusts the temperature of the air in the air-conditioned room 14. The air conditioner 5 cools or heats the air in the air-conditioned room 14 so that the temperature of the air in the air-conditioned room 14 becomes a set target temperature (air-conditioned room target temperature).

[0019] The air-conditioned room temperature sensor 13 is a sensor that acquires the temperature of the air in the air-conditioned room 14 and transmits it to the controller 10. Note that the air-conditioned room temperature sensor 13 may be built into the air conditioner 5, but if it is built into the air conditioner 5, only information about the surroundings of the air conditioner 5 can be obtained. It is preferable to provide the sensor independent of the air conditioner 5 so that information about the air-conditioned room 14 as a whole can be obtained.

[0020] The controller 10 is a controller that controls the entire central air-conditioning system (central air-conditioning device). The controller 10 is connected to the transport fans 3a to 3d, the room temperature sensors 11a to 11d, the room occupancy sensors 12a to 12d, the air-conditioned room temperature sensor 13, and the air conditioner 5 so as to be able to communicate with them via wireless communication. Connection via wireless communication eliminates the need for complicated wiring work. However, at least some of these may be connected so as to be able to communicate with them via wired communication.

[0021] In addition, the controller 10 controls the air conditioner 5 based on the air temperature in the air-conditioned room 14 acquired by the air-conditioned room temperature sensor 13 so that the temperature in the air-conditioned room 14 becomes a target temperature (air-conditioned room target temperature) set for the air-conditioned room 14.

[0022] In addition, the controller 10 sets the airflow volume of the transport fans 3a to 3d according to the room temperatures of the rooms 2a to 2d acquired by the room temperature sensors 11a to 11d, the target temperatures (room target temperatures) set for the rooms 2a to 2d, and the like.

[0023] That is, the controller 10 controls the airflow rates of the transport fans 3a to 3b and the air conditioner 5. As a result, the air conditioned in the air-conditioned room 14 is transported to the rooms 2a to 2d at the airflow rates set in the transport fans 3a to 3d. As a result, the indoor temperatures of the rooms 2a to 2d approach the target temperatures of the respective rooms (air-conditioned spaces). That is, the central air-conditioning device conditions the air in the air-conditioned room 14 and transports the conditioned air from the air-conditioned room 14 to the multiple air-conditioned spaces, thereby making it possible to bring the indoor temperatures of the multiple air-conditioned spaces closer to the target temperatures of the air-conditioned spaces. In this way, the controller 10 controls the entire house 1 (multiple air-conditioned spaces) to approach the target temperature.

[0024] The controller 10 may set a target temperature (air-conditioned room target temperature) for the air-conditioned room 14 based on the temperatures acquired by the room temperature sensor 11 and the air-conditioned room temperature sensor 13, and control the air conditioner 5 so that the set target temperature (air-conditioned room target temperature) is reached. The controller 10 then controls the airflow rates of the transport fans 3a to 3d to bring the rooms 2a to 2d closer to the target temperatures (room target temperatures) set for each of the rooms 2a to 2d. By controlling the air conditioner 5 and the transport fans 3a to 3b, the temperature of the entire house 1 (the multiple spaces to be air conditioned) can be brought closer to the target temperature.

[0025] The central air conditioning system may also include a storage battery 16, which is provided in or near the house 1. That is, the storage battery 16 may be installed in the house 1 or outdoors outside the house 1. The storage battery 16 can store power (electricity), and stores power generated by solar power generation, power supplied from a power supply company, and the like. The storage battery 16 is a power supply source for the central air conditioning system (central air conditioning device) that is different from the power supply from the power supply company. The storage battery 16 is also a power supply source for electrical devices in the house 1 that is different from the power supply from the power supply company. The electrical devices in the house 1 are, for example, devices other than the central air conditioning system, such as lighting devices, electric cookers, microwave ovens, televisions, hair dryers, and refrigerators. In this way, the storage battery 16 can function as a backup power source in a power outage state in which the power supply from the power supply company is stopped.

[0026] The central air conditioning system may further include an exhaust vent 21 and a heat exchange type ventilation device 17.

[0027] The exhaust port 21 is an opening for exhausting air from each living room 2. The exhaust port 21a is provided in the living room 2a, the exhaust port 21b is provided in the living room 2b, the exhaust port 21c is provided in the living room 2c, and the exhaust port 21d is provided in the living room 2d. Each exhaust port 21 may be provided with an exhaust fan. That is, the exhaust port 21a may be provided with a first exhaust fan, the exhaust port 21b may be provided with a second exhaust fan, the exhaust port 21c may be provided with a third exhaust fan, and the exhaust port 21d may be provided with a fourth exhaust fan. By operating each exhaust fan, the air in each living room 2 is exhausted to the outside of each living room 2 via each exhaust port 21. Each exhaust port 21 is connected to a heat exchange type ventilation device 17 described later via a duct or the like. The air exhausted from each exhaust port 21 is exhausted to the outside via the duct and the heat exchange type ventilation device 17. The combination of the exhaust port 21 and the living room 2 does not necessarily have to be a pair, and multiple exhaust ports 21 may be installed for one living room 2.

[0028] Each exhaust fan is a fan that exhausts air from the corresponding living room 2a to 2d, and may be a ceiling fan, a wall fan, a range hood, or the like. Each exhaust fan is configured so that its exhaust air volume can be set in multiple stages. Normally, each exhaust fan is controlled so that the exhaust air volume is set to a preset value. Then, the exhaust air volume is controlled for each exhaust fan according to the user's settings, values ​​acquired by various sensors, and control contents. The exhaust air volume is controlled by the controller 10, for example.

[0029] Next, we will explain the heat exchange type ventilation device 17. The heat exchange type ventilation device 17 is a ventilation device that supplies and exhausts air to and from an indoor space and can be installed in the ceiling, inside a side wall, or under the floor of a building, and has a function of exchanging heat when supplying and exhausting air.

[0030] The heat exchange type ventilation device 17 ventilates while exchanging heat between air exhausted from indoors to outdoors (exhaust air flow) and air supplied from outdoors to indoors (supply air flow). That is, the heat exchange type ventilation device 17 not only performs ventilation, but also transfers the heat of the supply air flow to the exhaust air flow during this ventilation, thereby suppressing unnecessary inflow of heat. Alternatively, the heat exchange type ventilation device 17 not only performs ventilation, but also transfers the heat of the exhaust air flow to the supply air flow during this ventilation, thereby suppressing unnecessary outflow of heat.

[0031] Here, the exhaust flow is a flow of air discharged from indoors to outdoors. The exhaust flow is transported from indoors (each living room 2) to the heat exchanger type ventilation device 17. In the case of this embodiment, the air in each living room 2 is transported to the heat exchanger type ventilation device 17 via each exhaust port 21 and a duct of each living room 2. The exhaust flow that has exchanged heat with the intake air flow by the heat exchanger type ventilation device 17 is discharged from the heat exchanger type ventilation device 17 to outdoors via a duct or the like.

[0032] The supply air flow is a flow of air introduced from outdoors to indoors. The supply air flow is transported from outdoors to the heat exchange type ventilation device 17. In the case of this embodiment, outdoor air is transported to the heat exchange type ventilation device 17 via a duct or the like. The supply air flow that has exchanged heat with the exhaust air flow by the heat exchange type ventilation device 17 is introduced indoors. In this embodiment, the supply air flow that has exchanged heat with the exhaust air flow by the heat exchange type ventilation device 17 is introduced into the air-conditioned room 14, and the air introduced into the air-conditioned room 14 is conditioned by the air conditioner 5.

[0033] In this way, the heat exchange type ventilation device 17 is a device that ventilates while exchanging heat between the indoor air RA (exhaust air flow) and the outdoor air OA (supply air flow).

[0034] Specifically, the heat exchange type ventilation device 17 has a housing having a generally rectangular parallelepiped shape. An inside air port, an exhaust port, an outside air port, and an intake port are provided on the side of the housing.

[0035] The indoor air vent is an intake port for taking in indoor air RA (exhaust air flow) into the heat exchange type ventilation device 17. The exhaust port is an outlet port for discharging the exhaust air flow from the heat exchange type ventilation device 17 to the outdoors as exhaust air EA. The outdoor air vent is an intake port for taking in outdoor air OA (supply air flow) into the heat exchange type ventilation device 17. The supply air vent is an outlet port for discharging the supply air flow from the heat exchange type ventilation device 17 to the outdoors as supply air SA.

[0036] The housing is provided with a heat exchange element 20. The heat exchange element 20 is a member for exchanging heat between the exhaust air flow and the intake air flow. The heat exchange may be sensible heat exchange, which exchanges temperature between the exhaust air flow and the intake air flow, or total heat exchange, which exchanges both sensible heat and latent heat, which exchanges humidity between the exhaust air flow and the intake air flow.

[0037] The heat exchange element 20 is a total heat exchange element formed of a heat transfer paper (heat transfer plate) based on cellulose fiber. However, the material is not limited to this. For example, a moisture-permeable resin film based on polyurethane or polyethylene terephthalate, or a paper material based on cellulose fiber, ceramic fiber, or glass fiber can be used as the heat transfer plate constituting the heat exchange element 20. In addition, the heat transfer plate constituting the heat exchange element 20 can be a thin sheet having heat conductivity and a property that gas does not permeate. In this case, the heat exchange element 20 becomes a sensible heat exchange element.

[0038] Furthermore, an exhaust fan 19 and an intake fan 18 are provided inside the housing.

[0039] The exhaust fan 19 is a blower that takes in the exhaust air flow from the inside air port and expels it from the exhaust port. The supply fan 18 is a blower that takes in the supply air flow from the outside air port and expels it from the supply air port.

[0040] Inside the housing, an exhaust air duct that connects the inside air port and the exhaust air duct, and an intake air duct that connects the outside air port and the intake air duct are formed. The exhaust air flow sucked in by the exhaust blower fan 19 passes through the heat exchange element 20 in the exhaust air duct and the exhaust blower fan 19, and is exhausted to the outdoors from the exhaust air duct. In other words, the exhaust blower fan 19 transports the air from the multiple air-conditioned spaces (rooms 2) to the outdoors as an exhaust air flow.

[0041] The supply air flow sucked in by the supply air blower fan 18 passes through the heat exchange element 20 in the supply air duct and the supply air blower fan 18, and is supplied from the air supply port to the indoors (air-conditioned room 14). In other words, the supply air blower fan 18 transports the outdoor air as the supply air flow to the indoors (air-conditioned room 14).

[0042] When performing heat exchange ventilation, the heat exchange type ventilation device 17 operates the exhaust blower fan 19 and the supply blower fan 18, and exchanges heat in the heat exchange element 20 between the exhaust flow flowing through the exhaust air duct and the supply air flow flowing through the supply air duct.

[0043] As a result, when ventilating, the heat exchanger type ventilation device 17 transfers the heat of the intake airflow brought into the room to the exhaust airflow discharged to the outside, suppressing the inflow of unnecessary heat. As a result, when ventilating in the Japanese summer, it is possible to suppress the rise in indoor temperature due to air with a high outdoor temperature. Also, when ventilating, the heat exchanger type ventilation device 17 transfers the heat of the exhaust airflow discharged to the outside to the intake airflow brought into the room, suppressing the release of unnecessary heat and recovering heat indoors. As a result, when ventilating in the Japanese winter, it is possible to suppress the drop in indoor temperature due to air with a low outdoor temperature.

[0044] Next, each function of the controller 10 according to the first embodiment will be described with reference to Fig. 2. Fig. 2 is a schematic functional block diagram of the controller 10 according to the first embodiment.

[0045] The controller 10 according to the first embodiment includes a power detection unit 30, a power saving request unit 31, a power amount acquisition unit 32, and an equipment control unit 33. As described above, an object of the present invention is to provide a central air conditioning system capable of appropriately reducing the amount of power in a situation where power saving is necessary in the house 1. In the first embodiment, a case where a power outage occurs will be described as a situation where power saving is necessary in the house 1.

[0046] The power detection unit 30 detects the power supply from the power supply company. The power from the power supply company is supplied to an outlet or the like provided in the house 1 via the distribution board 22, and is also supplied to the central air conditioning system (central air conditioning device). That is, the power from the power supply company is also supplied to the controller 10 via the distribution board 22. The power detection unit 30 detects the presence or absence of power supply from the power supply company by, for example, monitoring the voltage or current of the power from the power supply company supplied to the controller 10 via the distribution board 22. That is, when a power outage occurs in which the power supply from the power supply company is stopped, the power detection unit 30 detects the power outage. Note that the storage battery 16 is also connected to the controller 10, and the power supply to the controller 10 is not stopped even if a power outage occurs.

[0047] The controller 10 does not need to include the power detection unit 30. In this case, a power supply detection device that detects power supply from a power supply company may be provided separately, and the power supply detection device and the controller 10 may be communicably connected to notify the controller 10 of the presence or absence of power supply from the power supply company. In other words, the controller 10 may include a power detection information acquisition unit instead of the power detection unit 30. Power supply from the power supply company can be detected from the information acquired by the power detection information acquisition unit.

[0048] When the power detection unit 30 detects a power outage, the power saving request unit 31 makes a reduction request (power saving request) to the device control unit 33 to reduce the use of power.

[0049] The power amount acquiring unit 32 acquires the remaining amount of power in the storage battery 16. Specifically, the power amount acquiring unit 32 acquires the remaining amount of power in the storage battery 16 by performing wireless communication or wired communication with the storage battery 16.

[0050] The equipment control unit 33 normally controls the airflow rates of the transport fans 3a to 3d and the air conditioner 5 as part of the control of the entire building air conditioning system. The equipment control unit 33 controls the air conditioning by the air conditioner 5 to set the indoor temperatures of the rooms 2a to 2d to target temperatures, and further controls the air in the air-conditioned room 14 that has been conditioned by the air conditioner 5 to be blown into the rooms 2a to 2d by the transport fans 3a to 3d. The controller 10 controls the air conditioning intensity of the air conditioner 5 and the airflow rate of the conveying fan 3 based on the current indoor temperature of the living room 2 and the target temperature. For example, if the difference between the current indoor temperature of the living room 2 and the target temperature is large, the air conditioning intensity is increased, and if the difference between the current indoor temperature of the living room 2 and the target temperature is large, the airflow rate of the corresponding conveying fan 3 is increased. As a result, the indoor temperature of the living room 2 approaches the target temperature. In other words, the central air conditioning system (central air conditioning device) conditions the air in the air-conditioned room 14 and conveys the conditioned air of the air-conditioned room 14 to multiple air-conditioned spaces (living rooms 2), thereby making it possible to bring the indoor temperatures of the multiple air-conditioned spaces closer to the target temperatures of the air-conditioned spaces. In addition, the equipment control unit 33 may also control the exhaust air blower fan 19 and the supply air blower fan 18 to control the indoor ventilation rate.

[0051] The functions of the controller 10 can be realized as hardware by elements and mechanical devices such as a computer CPU (Central Processing Unit), and as software by a computer program, etc., but here they are realized by cooperation between them. Therefore, each function can be realized in various forms by combining hardware and software.

[0052] Here, when a power outage occurs, if air conditioning control is performed in the same manner as before the power outage occurred, there is a possibility that all the power in storage battery 16 will be consumed in a short time. In other words, there is a possibility that the comfort of the residents in house 1 will be lost early. In addition, if storage battery 16 is also supplying power to other devices in house 1, such as a refrigerator, there is a possibility that food in the refrigerator will deteriorate early. For this reason, it is desirable to perform power saving processing that uses storage battery 16 to maintain comfort for a long period of time.

[0053] First, when a power outage occurs, the power detection unit 30 detects the power outage, and the power saving request unit 31 issues a reduction request to reduce power usage to the equipment control unit 33. Based on the reduction request, the equipment control unit 33 performs power saving processing of the central air conditioner such that after the reduction request is made, the air in the air-conditioned room 14 is not conveyed to all of the multiple air-conditioned spaces (rooms 2a to 2d) but is conveyed only to specific air-conditioned spaces.

[0054] As an example of the power saving process, the equipment control unit 33 controls the transport fan 3 (transport unit) so that the air in the air-conditioned room 14 is transported only to a specific air-conditioned space. Before the reduction request, for example, all the transport fans 3 are operating, and the air in the air-conditioned room 14 is transported to the living room 2a by the transport fan 3a, to the living room 2b by the transport fan 3b, to the living room 2c by the transport fan 3c, and to the living room 2d by the transport fan 3d. That is, the air in the air-conditioned room 14 is transported to all of the multiple air-conditioned spaces. After the reduction request, the equipment control unit 33 operates only the transport fan corresponding to the specific air-conditioned space. For example, by operating only the transport fan 3a corresponding to the living room 2a, which is a specific air-conditioned space, the air in the air-conditioned room 14 is transported only to the living room 2a (for example, the living room) by the transport fan 3a. The equipment control unit 33 brings the indoor temperature of the specific air-conditioned space closer to the target temperature of the air-conditioned space.

[0055] It is preferable to provide a damper as the transport unit. The damper is provided corresponding to the air outlet 4 of the living room 2, and can open and close the opening of the air outlet 4. A plurality of dampers corresponding to the air outlet 4 are provided as the transport unit, and a first damper is provided for the air outlet 4a of the living room 2a, a second damper is provided for the air outlet 4b of the living room 2b, a third damper is provided for the air outlet 4c of the living room 2c, and a fourth damper is provided for the air outlet 4d of the living room 2d. Each damper is controlled by the device control unit 33. In the power saving process, after a reduction request, the device control unit 33 operates only the transport fan corresponding to the specific air-conditioned space. For example, when only the transport fan 3a corresponding to the living room 2a, which is a specific air-conditioned space, is operated, the first damper is opened (i.e., the opening of the air outlet 4a is opened), and the second damper, the third damper, and the fourth damper are closed (i.e., the openings of the air outlet 4b, the air outlet 4c, and the air outlet 4d are closed). This allows the air in the air-conditioned room 14 to be transported to a more specific air-conditioned space. It can only be transported between

[0056] The damper may be provided corresponding to the transport duct 15. That is, the amount of air in the air-conditioning room 14 that can pass through the transport duct 15 is determined by opening and closing the damper. The damper is provided somewhere in the transport duct 15. That is, the damper may be provided at the end of the transport duct 15 on the transport fan 3 side, or at the end of the transport duct 15 on the air outlet 4 side, or at any other location. In this way, the damper is provided corresponding to the transport duct 15, and can open and close the opening in the transport duct 15. A plurality of dampers corresponding to the transport duct 15 are provided as the transport unit, and a first damper is provided for the transport duct 15a, a second damper is provided for the transport duct 15b, a third damper is provided for the transport duct 15c, and a fourth damper is provided for the transport duct 15d. Each damper is controlled by the equipment control unit 33. In the power saving process, after a reduction request, the equipment control unit 33 operates only the transport fan corresponding to a specific air-conditioned space. For example, when only the transport fan 3a corresponding to the room 2a, which is a specific air-conditioned space, is operated, the first damper is opened (i.e., the air in the air-conditioned room 14 is transported to the room 2a via the transport duct 15a), and the second damper, the third damper, and the fourth damper are closed (i.e., the air in the air-conditioned room 14 is not transported to the rooms 2b, 2c, and 2d via the transport ducts 15b, 15c, and 15d). This makes it possible to transport the air in the air-conditioned room 14 only to a more specific space to be air-conditioned.

[0057] The specific air-conditioned space to which the air from the air-conditioned room 14 is transported after a reduction request may be set in advance. In the above example, the living room 2a is set in advance as the specific air-conditioned space. In addition, the specific air-conditioned space may be set to two or more spaces instead of one space.

[0058] Furthermore, the specific air conditioned space may be determined based on detection information by the human detection unit. As an example, the specific air conditioned space may be determined based on detection information by the room human sensor 12. For example, if the detection information by the room human sensor 12 indicates that a person is present in the room 2a and that no people are present in the rooms 2b, 2c, and 2d, the room 2a where a person is present may be determined as the specific air conditioned space.

[0059] Furthermore, if the human detection unit is capable of detecting the number of people present in each living room 2, the living room 2 with the largest number of people may be determined as the specific space to be air conditioned.

[0060] Furthermore, if the person detection unit is, for example, a camera and is capable of estimating a person's age information, the room 2 in which the oldest person resides may be determined as the specific space to be air-conditioned. This allows consideration to be given to the physical condition of the elderly with priority. Also, consideration can be given to elderly people who have difficulty moving. Similarly, the room 2 in which the youngest person resides, such as an infant, may be determined as the specific space to be air-conditioned. This allows consideration to be given to the physical condition of the elderly with priority. Also, consideration can be given to infants who have difficulty moving.

[0061] Furthermore, if the person detection unit is, for example, a camera with a face recognition function, and the faces and personal information of multiple residents (users) are registered in advance, a room 2 in which a specific person exists may be determined as a specific space to be air-conditioned. The specific person may be set in advance taking into consideration various conditions such as the elderly, infants, and people with disabilities.

[0062] By carrying out the power saving process as described above, the volume of the air conditioned space that needs to be air conditioned after the reduction request is made becomes smaller than before the reduction request was made. In other words, the thermal load that needs to be air conditioned becomes smaller. This reduces the power consumption of the entire central air conditioning system (air conditioner 5, transport unit, etc.). In other words, when power saving is required within house 1, it is possible to appropriately reduce the amount of power. Also, because the central air conditioning system is not completely stopped, it is possible to appropriately reduce the amount of power consumed while minimizing any decrease in user comfort. Furthermore, when a specific space to be air-conditioned is determined based on the detection information by the human detection unit, it is possible to appropriately reduce the amount of power consumed while suppressing a decrease in the comfort of users who require appropriate air conditioning.

[0063] Furthermore, in the power saving process, the specific air conditioned spaces may be determined based on the remaining power of the storage battery 16. For example, if the remaining power of the storage battery 16 is large, three air conditioned spaces (room 2) may be determined as the specific air conditioned spaces, if the remaining power of the storage battery 16 is medium, two air conditioned spaces may be determined as the specific air conditioned spaces, and if the remaining power of the storage battery 16 is small, one air conditioned space may be determined as the specific air conditioned space.

[0064] The device control unit 33 may control the intake air blower fan 18 and the exhaust air blower fan 19. When performing the power saving process, the device control unit 33 sets the airflow rates of both the intake air blower fan 18 and the exhaust air blower fan to a predetermined airflow rate or less. For example, a preset airflow rate is stored in a memory or the like as the predetermined airflow rate, and when performing the power saving process, the airflow rates of the intake air blower fan 18 and the exhaust air blower fan are set to the predetermined airflow rate or less. The predetermined airflow rate may be, for example, an airflow rate required for minimum ventilation in the living room 2. The airflow rate required for minimum ventilation may be a ventilation airflow rate corresponding to a ventilation rate of 0.5 times or more per hour as specified by the Building Standards Act or the like, or may be a ventilation airflow rate that allows ventilation of 20 cubic meters per hour. This allows further reduction in the amount of power in a situation where power saving is necessary in the house 1. Furthermore, the device control unit 33 may stop the airflow of the intake air blower fan 18 and the exhaust air blower fan when performing the power saving process. This allows further reduction in the amount of power. The device control unit 33 may set the air volume of at least one of the supply air fan 18 and the exhaust air fan 19 to a predetermined volume or less.

[0065] Incidentally, the predetermined air volume may be determined based on the remaining power of the storage battery 16. For example, a case will be described where the set air volumes of the intake air fan 18 and the exhaust air fan 19 can be set from 0 to 10 and the normal setting is 7. The smaller the set air volume, the smaller the air volume of the intake air fan 18 and the exhaust air fan. When the set air volume is 0, the intake air fan 18 and the exhaust air fan are stopped. For example, if the remaining power of the storage battery 16 is large, the set air volume of the intake air fan 18 and the exhaust air fan 19 is set to 3; if the remaining power of the storage battery 16 is medium, the set air volume of the intake air fan 18 and the exhaust air fan 19 is set to 1; and if the remaining power of the storage battery 16 is small, the set air volume of the intake air fan 18 and the exhaust air fan 19 is set to 0. In this way, the amount of power can be appropriately reduced based on the remaining power of the storage battery 16. As a result, when the remaining power amount of the storage battery 16 is large, it is possible to appropriately reduce the amount of power while further suppressing the deterioration of the user's comfort.

[0066] In this way, the device control unit 33 performs power saving processing based on a reduction request to reduce power usage. In addition, since the central air conditioning system is not completely stopped, the amount of power can be appropriately reduced while suppressing a decrease in user comfort. In addition, the amount of power can be appropriately reduced based on the remaining amount of power in the storage battery 16. As a result, when the remaining amount of power in the storage battery 16 is large, the amount of power can be appropriately reduced while further suppressing a decrease in user comfort. In addition, a decrease in user comfort can be suppressed while suppressing power usage by the storage battery 16. In other words, user comfort can be maintained for a long time while suppressing power usage by the storage battery 16.

[0067] Central air conditioning systems are generally installed in highly insulated and airtight houses. Therefore, even if the air in the air-conditioned room 14 is not conveyed to all of the multiple air-conditioned spaces, but is conveyed only to a specific air-conditioned space, the indoor temperature in the air-conditioned space does not change suddenly due to the influence of outside air, etc., and it is possible to maintain the indoor temperature for a certain period of time. Even if the air is not delivered to all of the multiple air conditioned spaces but is delivered only to a specific one of the air conditioned spaces, the user's comfort will not be immediately reduced.

[0068] Furthermore, the power saving process narrows the area through which air is transported from the air-conditioned room 14. Narrowing the area through which air is transported from the air-conditioned room 14 reduces the air conditioning load and makes it possible to reduce the power consumption of the air conditioner 5. In other words, in a situation where power saving is necessary in the house 1, the power saving process can appropriately reduce the amount of power consumed.

[0069] The controller 10 according to the first embodiment may further include a notification control unit 34 and a display unit 35.

[0070] During power saving processing, if the temperature difference between a specific air-conditioned space to which air from the air-conditioned room 14 is transported and an air-conditioned space to which air from the air-conditioned room 14 is not transported is equal to or greater than a predetermined temperature, the notification control unit 34 notifies the user that the temperature difference is large.

[0071] The predetermined temperature is for determining whether the comfort of the air-conditioned space to which the air from the air-conditioned room 14 is not transported has decreased due to a temperature difference, and is set arbitrarily in advance through experiments, etc. The predetermined temperature may also be set by the user. For example, an input unit may be provided in the controller 10, and the temperature input to the input unit may be set as the predetermined temperature.

[0072] The notification is given, for example, via the display unit 35 described later. The display content generated by the notification control unit 34 for the display unit 35 is not particularly limited. For example, a message may be generated indicating that there is a large temperature difference between the temperature of a specific air-conditioned space to which the air of the air-conditioned room 14 is transported and an air-conditioned space to which the air of the air-conditioned room 14 is not transported, or a message may be generated indicating that the temperature difference is large.

[0073] The display unit 35 is a thin display device such as a liquid crystal display or an organic EL (electroluminescence) display. In this embodiment, a display is mounted on the controller 10. The display unit 35 displays a screen and a message generated by the notification control unit 34. The display unit may not be mounted on the controller 10. For example, the display unit may be installed in a room 2 different from the room 2 in which the controller 10 is installed, and the user may be notified via the display unit. The display unit and the notification control unit 34 are connected by wireless communication or wired communication, and the display content is transmitted to the display unit by the notification control unit 34. The user may also be notified via a display unit of a mobile terminal carried by the user. An example of the mobile terminal is a smartphone. The mobile terminal and the notification control unit 34 are connected by wireless communication, and the display content is transmitted to the display unit by the notification control unit 34. The user may also be notified via a display unit of a television, a personal computer, or the like.

[0074] This allows the user to understand the temperature situation of the air-conditioned space to which the air from the air-conditioned room 14 is not being transported, and to take measures such as clothing that correspond to the temperature difference. For example, if there is a large drop in temperature in the air-conditioned space to which the air from the air-conditioned room 14 is not being transported in winter, the user can take measures such as wearing thicker clothes when moving to the air-conditioned space to which the air from the air-conditioned room 14 is not being transported.

[0075] Furthermore, when the air-conditioned space to which air from the air-conditioned room 14 is not transported is a changing room, the notification control unit 34 issues a notification that there is a risk of heat shock due to the temperature difference if the temperature difference is equal to or greater than a predetermined temperature. The notification is issued via the display unit 35 or the like in the same manner as above. The notification control unit 34, for example, generates a message to the effect that there is a risk of heat shock and transmits it to the display unit 35. This allows the user to know in advance that there is a risk of heat shock and to take action.

[0076] In this embodiment, the user is notified via the display unit 35, but other methods may be used. For example, the notification control unit 34 may notify the user by turning on an LED as the notification unit. The notification control unit 34 may also notify the user by sound by sounding a buzzer as the notification unit. The notification unit may be provided in a space where the controller 10 is installed, or in a space where the controller 10 is not installed, for example, in a dressing room or in a bathroom. The notification unit may be provided in a mobile terminal or the like carried by the user.

[0077] Incidentally, during the power saving process, the specific air-conditioned space may be changed over time. As described above, the whole-house air-conditioning system is generally installed in a highly insulated and airtight house, and the indoor temperature in the air-conditioned space does not change suddenly due to the influence of the outside air, etc., even without conveying the air of the air-conditioned room 14 to the air-conditioned space, and it is possible to maintain the indoor temperature for a certain period of time. Therefore, by changing the specific air-conditioned space as the air-conditioned space over time, it is possible to easily maintain the indoor temperature in a plurality of air-conditioned spaces. This makes it possible to further suppress the deterioration of comfort for the user. How the specific air-conditioned space as the air-conditioned space is changed over time may be set in advance, for example. For example, it may be changed in the order of the large living room 2, or in the order prioritized by the user. In addition, two or more spaces may be set as the specific air-conditioned space, rather than one space. In addition, the order of changing the specific air-conditioned space may be determined based on the detection information by the human detection unit. For example, the living room 2 in which a person is present may be determined in order of the earliest.

[0078] Furthermore, if the human detection unit is capable of detecting the number of people present in each living room 2, the living room 2 with the most people present may be determined in order of earliest presence.

[0079] Furthermore, if the person detection unit is, for example, a camera and is capable of estimating people's age information, the room 2 in which the oldest person resides may be determined in order of age. This allows consideration to be given to the physical condition of the elderly with priority. Also, consideration can be given to elderly people who have difficulty moving. Similarly, the room 2 in which the youngest person resides, such as an infant, may be determined in order of age. This allows consideration to be given to the physical condition of infants with priority. Also, consideration can be given to infants who have difficulty moving.

[0080] Furthermore, if the person detection unit is, for example, a camera with a face recognition function, and the faces and personal information of residents (users) are registered in advance, the rooms 2 in which a specific person exists may be determined in order of their presence. The specific person may be set in advance in consideration of various conditions such as the elderly, infants, and people with disabilities.

[0081] Moreover, the time period over which the specific air conditioned space is changed may be set in advance, for example. For example, the time period over which a large living room 2 becomes a specific air conditioned space may be set long, or may be set arbitrarily by the user. Also, the time period over which a living room 2 in which a person is present may be set long.

[0082] Furthermore, if the human detection unit is capable of detecting the number of people present in each living room 2, the time may be set longer for a living room 2 in which many people are present.

[0083] Furthermore, if the person detection unit is, for example, a camera and is capable of estimating a person's age information, the time may be set longer for the room 2 in which the oldest person resides. This allows consideration to be given to the health of the elderly with priority. Also, consideration can be given to elderly people who have difficulty moving. Similarly, the time may be set longer for the room 2 in which the youngest person, such as an infant, resides. This allows consideration to be given to the health of the infant with priority. Also, consideration can be given to infants who have difficulty moving.

[0084] Furthermore, if the person detection unit is, for example, a camera with a face recognition function and the face and personal information of the resident (user) are registered in advance, the time for a specific person to be present in room 2 may be set longer. The specific person may be set in advance taking into consideration various conditions such as the elderly, infants, and people with disabilities.

[0085] Also, there may be times when the air of the air-conditioned room 14 is transported and times when it is not transported in all the air-conditioned spaces. That is, as time passes, there are times when the air of the air-conditioned room 14 is transported in all the air-conditioned spaces during the power saving process, and this makes it easier to maintain the indoor temperature in all the air-conditioned spaces. Therefore, it is possible to suppress a decrease in the comfort of the user. Specifically, the air-conditioned space to be the specific air-conditioned space may be selected from all the air-conditioned spaces in order of priority, and may be changed as time passes. The priority may be set in advance, for example. For example, it may be changed in order of the larger living room 2, or it may be changed in order of priority given by the user. Also, two or more spaces may be set as the specific air-conditioned space, instead of one space. Also, the priority may be set to a room 2 in which a person exists, or a room 2 in which many people exist. Also, the priority may be set to a room 2 in which an elderly person exists, or a room 2 in which a young person such as an infant exists. In addition, the room 2 in which a specific person exists may be given a higher priority, and the specific person may be set in advance taking into consideration various conditions such as the elderly, infants, and disabled people. For example, air from the air-conditioned room 14 is delivered to the rooms 2a, 2b, 2c, and 2d in that order.

[0086] In addition, when the air-conditioned space with the lowest priority is selected in the selection of a specific air-conditioned space, the air-conditioned space with the highest priority may be selected again next time. For example, when air from air-conditioned room 14 is transported to room 2a, room 2b, room 2c, and room 2d in that order, air from air-conditioned room 14 is transported to room 2a again. As a result, during the power saving processing period, all air-conditioned spaces are periodically selected as specific air-conditioned spaces, making it easier to maintain the indoor temperature in all air-conditioned spaces. This makes it possible to suppress a decrease in user comfort.

[0087] (Embodiment 2) Next, a case where a power saving request is made by the power supply company will be described as a situation where power saving is necessary in the house 1. In summer and winter in Japan, power consumption increases compared to spring and autumn due to an increase in power related to air conditioning. This may result in a demand for power that exceeds the power that the power supply company can supply. For this reason, a power saving request may be made to the area to which the power supply company supplies power. In the present invention, a power saving process is performed in response to such a power saving request from the power supply company.

[0088] The system schematic diagram of the central building air-conditioning system according to the second embodiment is Fig. 1, similarly to the first embodiment. However, the central building air-conditioning system according to the second embodiment does not necessarily need to include the storage battery 16.

[0089] Next, each function of the controller 10 according to the second embodiment will be described with reference to Fig. 3. Fig. 3 is a schematic functional block diagram of the controller 10 according to the second embodiment.

[0090] The controller 10 according to the second embodiment includes a receiving unit 40, a power-saving requesting unit 41, a device control unit 42, a notification control unit 34, and a display unit 35.

[0091] Here, the central air-conditioning system further includes a power management server 50. The power management server 50 is an information processing device that acquires power-saving request information from a power supply company and provides the acquired power-saving request information to the controller 10 (central air-conditioning device). Specifically, the power management server 50 receives a power saving request from a power supply company via a network such as the Internet, selects an area that corresponds to the target of the power saving request based on the received power saving request, and transmits a reduction request to reduce power use to the central building air conditioners belonging to the selected area. The areas in which each central building air conditioner is installed are registered in advance in the power management server 50. The registration may be performed in advance by a user, or may be performed by a contractor of the central building air conditioner, or the central building air conditioner may be equipped with a GPS and the area in which the central building air conditioner is installed may be transmitted to the power management server 50 via a receiving unit 40 described later and registered in the power management server 50. Alternatively, registration may be performed by another method.

[0092] The controller 10 has a wireless communication function and is communicatively connected to the power management server 50 via a network such as the Internet. The controller 10 may also be connected to the power management server 50 via a network by wired communication.

[0093] The notification control unit 34 and the display unit 35 are similar to those in the first embodiment, and therefore the description thereof will be omitted.

[0094] The receiving unit 40 receives a reduction request from the power management server 50. When the receiving unit 40 receives the reduction request from the power management server 50, the receiving unit 40 transmits to the power saving request unit 41 a notification that the reduction request has been received.

[0095] When the power saving request unit 41 receives a notification that a reduction request has been received from the receiving unit 40, the power saving request unit 41 makes a reduction request (power saving request) to the device control unit 42 to reduce the use of power.

[0096] Like the equipment control unit 33, the equipment control unit 42 also normally controls the airflow rates of the transport fans 3a to 3d and the air conditioner 5 as part of the control of the central air conditioning system (central air conditioning device). The equipment control unit 42 controls the air conditioning by the air conditioner 5 to set the indoor temperatures of the rooms 2a to 2d to the target temperatures, and further controls the air in the air-conditioned room 14 conditioned by the air conditioner 5 to be transported to the rooms 2a to 2d by the transport fans 3a to 3d. The controller 10 (equipment control unit 42) controls the air conditioning intensity of the air conditioner 5, the airflow rate of the transport fan 3, and the like, based on the current indoor temperature of the room 2 and the target temperature. For example, if the difference between the current indoor temperature of the room 2 and the target temperature is large, the air conditioning intensity is increased, and if the difference between the current indoor temperature of the room 2 and the target temperature is large, the airflow rate of the corresponding transport fan 3 is increased. As a result, the indoor temperature of the room 2 approaches the target temperature. In other words, the central air conditioning system (central air conditioning device) conditions the air in the air-conditioned room 14 and transports the conditioned air from the air-conditioned room 14 to multiple air-conditioned spaces (rooms 2), thereby making it possible to bring the indoor temperatures of the multiple air-conditioned spaces closer to the target temperatures of the air-conditioned spaces. In addition, the equipment control unit 42 may also control the exhaust air fan 19 and the supply air fan 18 in order to control the ventilation volume of the room 2.

[0097] First, when a power saving request is issued from a power supply company, the power management server 50 receives power saving request information from the power supply company. The power management server 50 selects an area corresponding to the power saving request based on the received power saving request, and transmits a reduction request to reduce power use to the central building air conditioners belonging to the selected area. The receiver 40 of the central building air conditioners belonging to the selected area receives the reduction request from the power management server 50. The receiver 40 transmits a notification of receipt of the reduction request to the power saving request unit 41. When the power saving request unit 41 receives a notification of receipt of the reduction request from the receiver 40, the power saving request unit 41 makes a reduction request (power saving request) to reduce power use to the equipment control unit 42. The equipment control unit 42 performs power saving processing of the central building air conditioners, which does not convey air from the air conditioning room 14 to all of the multiple air conditioned spaces after the reduction request, but conveys it only to a specific air conditioned space. The content of the power saving processing is the same as the processing when a power outage occurs, so a description will be omitted.

[0098] In this way, the device control unit 42 performs power saving processing based on a request to reduce power usage. By performing the power saving processing, it is possible to suppress a decrease in user comfort while suppressing power usage. In other words, it is possible to maintain user comfort for a long time while suppressing power usage.

[0099] Central air conditioning systems are generally installed in highly insulated and airtight houses. Therefore, even if the air in the air-conditioned room 14 is not conveyed to all of the multiple air-conditioned spaces, but is conveyed only to a specific air-conditioned space, the indoor temperature in the air-conditioned space does not change suddenly due to the influence of outside air, etc., and it is possible to maintain the indoor temperature for a certain period of time. In other words, even if the air in the air-conditioned room 14 is not conveyed to all of the multiple air-conditioned spaces, but is conveyed only to a specific air-conditioned space, the user's comfort will not be immediately reduced.

[0100] Furthermore, the power saving process narrows the area through which air is transported from the air-conditioned room 14. Narrowing the area through which air is transported from the air-conditioned room 14 reduces the air conditioning load and makes it possible to reduce the power consumption of the air conditioner 5. In other words, in a situation where power saving is necessary in the house 1, the power saving process can appropriately reduce the amount of power consumed. Furthermore, by saving power in response to a power saving request from the power supply company, a reward according to the amount of power saved can be obtained.

[0101] (Embodiment 3) Next, a case where a power outage occurs will be described, in which a function is further added to the embodiment 1. The system schematic diagram of the central air-conditioning system according to the embodiment 3 is FIG. 1, similar to the embodiment 1.

[0102] Next, each function of the controller 10 according to the third embodiment will be described with reference to Fig. 4. Fig. 4 is a schematic functional block diagram of the controller 10 according to the third embodiment.

[0103] The controller 10 according to the third embodiment includes a power detection unit 30, a power saving request unit 31, a power amount acquisition unit 32, a device control unit 33, a notification control unit 34, a display unit 35, a storage unit 60 and an implementation period receiving unit 61.

[0104] The power detection unit 30, the power saving request unit 31, the power amount acquisition unit 32, the notification control unit 34, and the display unit 35 are similar to those in the first embodiment, and therefore description thereof will be omitted.

[0105] The implementation period receiving unit 61 receives the period during which the power saving process is to be performed. The period during which the power saving process is to be performed is input, for example, by a user. For example, an input unit is provided in the controller 10, and the user inputs the period during which the desired power saving process is to be performed into the input unit, whereby the implementation period receiving unit 61 receives the period during which the power saving process is to be performed input into the input unit. The input unit is, for example, a touch panel, and the implementation period receiving unit 61 receives the period during which the power saving process is to be performed input into the touch panel by the user. The implementation period may be set by time, by day of the week, by time for each day of the week, or can be set arbitrarily.

[0106] The storage unit 60 is a so-called memory, and stores the period during which the power-saving process is to be performed that is received by the implementation period receiving unit 61. The period during which the power-saving process is to be performed does not have to be the period received by the implementation period receiving unit 61. For example, the period during which the power-saving process is to be performed may be stored in advance in the storage unit 60.

[0107] The device control unit 33 basically performs the power saving process in the same manner as in the first embodiment. However, the device control unit 33 in the third embodiment performs the power saving process only during the set power saving process implementation period when a reduction request is made during a power outage. This allows the power saving process to be implemented only during the period desired by the user when a reduction request is made during a power outage.

[0108] For example, for a user who often goes out at night for work or the like, the power saving process may be performed only during the night. Similarly, for a user who often goes out during the day, the power saving process may be performed only during the day. This allows the power to be efficiently reduced during the period desired by the user, and by not performing the power saving process during the period not desired by the user, a decrease in the user's comfort can be suppressed.

[0109] Furthermore, power saving processing may be performed during time periods when power usage other than that of the central air conditioner is high in the house 1. This can suppress the occurrence of peak power usage in the house 1. Also, the peak power usage can be suppressed. Also, the amount of power per unit time in the house 1 can be equalized. This can efficiently reduce power during time periods when power usage other than that of the central air conditioner is high. Also, because the variation over time in power usage in the house 1 is reduced, it becomes easier to predict the transition of the remaining power in the storage battery 16.

[0110] (Embodiment 4) Next, in the case where a power outage occurs, the control contents that differ from those in the third embodiment in the case where a function is added to the first embodiment will be described.

[0111] The system schematic diagram of the central air-conditioning system according to the fourth embodiment is FIG. 1, similar to the first embodiment.

[0112] Next, each function of the controller 10 according to the fourth embodiment will be described with reference to Fig. 5. Fig. 4 is a schematic functional block diagram of the controller 10 according to the fourth embodiment.

[0113] The controller 10 of embodiment 4 includes a power detection unit 30, a power saving request unit 31, a power amount acquisition unit 32, an equipment control unit 33, a notification control unit 34, a display unit 35, an implementation period determination unit 70, an occupancy information storage unit 71 and an occupancy information acquisition unit 72.

[0114] The power detection unit 30, the power saving request unit 31, the power amount acquisition unit 32, the notification control unit 34, and the display unit 35 are similar to those in the first embodiment, and therefore description thereof will be omitted.

[0115] The occupancy information acquisition unit 72 acquires occupancy information of people (users) in each room 2 from the human detection unit. In this embodiment, a room human presence sensor 12 is used as the human detection unit, but as long as the occupancy information of each room 2 is known, the human detection unit does not have to be a room human presence sensor. For example, an ultrasonic sensor or a camera with a human detection function may be used. A camera without a human detection function may also be used, in which case it is sufficient that the controller 10 or the like has a human detection function. The human detection unit may be a thermal camera, an infrared sensor, etc.

[0116] The occupancy information storage unit 71 stores the occupancy information of people in each room 2 acquired by the occupancy information acquisition unit 72. For example, the occupancy information of people in each room 2 for each time period is stored. Each time period can be set arbitrarily, for example, every hour. The occupancy information storage unit 71 stores information on whether or not a person was present in each room for each hour. That is, the occupancy information storage unit 71 stores information on whether or not a person was present in the room 2 for 24 time periods, namely, from 0:00 to 1:00, 1:00 to 2:00, 2:00 to 3:00, ..., 22:00 to 23:00, and 23:00 to 24:00, for each day. In this way, the occupancy information storage unit 71 stores the occupancy history information of people in the room 2.

[0117] The implementation period determination unit 70 determines a power-saving process implementation period for performing the power-saving process based on the occupancy information of people in the room 2 acquired by the occupancy information acquisition unit 72. That is, the implementation period determination unit 70 determines a power-saving process implementation period based on the occupancy history information of people in the room 2 stored in the occupancy information storage unit 71. The period during which the power saving process is to be performed is determined.

[0118] For example, based on the presence history information of people, the implementation period determination unit 70 determines a time period when no one is in the living room 2 as a power saving process implementation period, and does not determine a time period when no one is in the living room 2 as a power saving process implementation period. The information used for the determination may be the presence information for each time period on the previous day, the presence information for each time period on the same day of the week one week ago, or the presence information for all time periods for the previous several days.

[0119] In other words, the power saving processing period may be the time periods during which no one is present in room 2 during each time period of the previous day, or the time periods during which no one is present in room 2 during each time period of the week prior, or the time periods during which no one is present in room 2 during all time periods over the previous few days, or the time periods during which no one is present in room 2 during any one of the time periods over the previous three days, or the power saving processing period may be determined in some other way.

[0120] In this way, when a reduction request is made during a power outage, the implementation period determination unit 70 determines a power saving process implementation period during which power saving process is performed based on the presence history information of people.

[0121] The device control unit 33 basically performs the power saving process in the same manner as in embodiment 1. However, when a reduction request is made in a power outage state, the device control unit 33 in embodiment 4 performs the power saving process only during the power saving process implementation period determined by the implementation period determination unit 70. As a result, when a reduction request is made in a power outage state, the power saving process can be performed only during the period when the user is not present in the room 2.

[0122] This allows appropriate power saving processing to be performed according to the presence status, which differs depending on the user, such as a user who is often out at night for work, etc., and a user who is often out during the day, etc. Therefore, power can be efficiently reduced during periods when the user is not in room 2, and by not performing power saving processing during periods when the user is in room 2, a decrease in user comfort can be suppressed.

[0123] (Embodiment 5) Although the central air-conditioning systems of the first to fourth embodiments have been described using Fig. 1, the central air-conditioning system may have a configuration other than that shown in Fig. 1. For example, in Fig. 1, the air conditioned in the air-conditioned room 14 is transported to each room via ducts, but this is not limited to this. For example, the system may have a configuration without ducts.

[0124] For example, air conditioned in the air-conditioning room 14 is transported to a shared space in the house 1 via a fan 81 or the like. A shared space is a space that is different from the living room 2, such as a corridor, staircase, or entrance hall. The air-conditioning room 14 and the shared space are connected by openings (louvers, etc.) provided in the walls, ceiling, floor, or below the doors of the air-conditioning room 14, and when a fan or the like installed in the air-conditioning room 14 is operated, the air conditioned in the air-conditioning room 14 is transported to the shared space without going through a duct.

[0125] The shared space and living room 2 are connected by openings (such as louvers) provided in the walls, ceiling, floor or under the doors of living room 2, and conditioned air supplied to the shared space is also transported to living room 2. In this way, air from the indoor space outside air-conditioned room 14 is transported to the space to be air-conditioned via at least one of the air supply port, air supply fan, and louver. The conditioned air may also be transported to living room 2 via the underfloor space, the space between floors, the ceiling space, etc.

[0126] In this way, the central air conditioning system transports the conditioned air from the air-conditioned room 14 to the indoor space outside the air-conditioned room 14, and the air from the indoor space outside the air-conditioned room 14 is transported to each of the multiple spaces to be air-conditioned. can be.

[0127] 6 is an example of a schematic functional block diagram of the controller 10 according to the embodiment 5. The controller 10 according to the embodiment 5 includes a receiving unit 40, a power-save requesting unit 41, a device control unit 42, a notification control unit 34, and a display unit 35.

[0128] The receiving unit 40, the power saving requesting unit 41, the notification control unit 34 and the display unit 35 are similar to those in the second embodiment, and therefore the description thereof will be omitted.

[0129] The device control unit 42 of the fifth embodiment is basically the same as the device control unit 42 of the second embodiment, but differences will be described below. When air in an indoor space outside the air-conditioning room 14 is transported to a space to be air-conditioned via an air supply port, the opening of the air supply port (opening) is controlled as a power saving process so that the air in the air-conditioning room 14 is transported only to a specific space to be air-conditioned. For example, the air supply port is provided with an opening / closing shutter 80, and the opening / closing shutter 80 is controlled by the device control unit 42. When the opening / closing shutter 80 is opened, the conditioned air supplied to the shared space is transported to the living room 2 via the air supply port with the opening / closing shutter 80 open. In other words, as a power saving process, only the opening / closing shutter 80 of the air supply port corresponding to the specific space to be air-conditioned is opened, and the opening / closing shutter 80 of the air supply port not corresponding to the specific space to be air-conditioned is closed.

[0130] Furthermore, when air from the indoor space outside the air-conditioned room 14 is transported to the air-conditioned space via a louver, the opening of the louver (opening) is controlled as a power-saving process so that the air from the air-conditioned room 14 is transported only to the specific air-conditioned space. For example, the louver is provided with an opening / closing shutter 80, which is controlled by the equipment control unit 42. When the opening / closing shutter 80 is opened, the conditioned air supplied to the shared space is transported to the living room 2 via the louver with the opening / closing shutter 80 open. In other words, as a power-saving process, only the opening / closing shutter 80 of the louver corresponding to the specific air-conditioned space is opened, and the opening / closing shutter 80 of the louver not corresponding to the specific air-conditioned space is closed.

[0131] 7 is a schematic functional block diagram of another example of the controller 10 according to the embodiment 5. The controller 10 according to the another example includes a receiving unit 40, a power-save requesting unit 41, a device control unit 42, a notification control unit 34, and a display unit 35.

[0132] The receiving unit 40, the power saving requesting unit 41, the notification control unit 34 and the display unit 35 are similar to those in the second embodiment, and therefore the description thereof will be omitted.

[0133] Equipment control unit 42 in another embodiment 5 is basically similar to equipment control unit 42 in embodiment 2, but differences will be described below. When air in the indoor space outside air-conditioned room 14 is transported to the air-conditioned space via air supply fan 82, as a power-saving process, air supply fan 82 is controlled so that air in air-conditioned room 14 is transported only to the specific air-conditioned space. For example, air supply fan 82 is controlled by equipment control unit 42. When air supply fan 82 operates, conditioned air supplied to the shared space is transported to the corresponding room 2 via air supply fan 82. In other words, as a power-saving process, only air supply fan 82 corresponding to the specific air-conditioned space is operated.

[0134] In this way, the present invention can be realized without using ducts. Also, conditioned air can be supplied to room 2 through various spaces within house 1.

[0135] The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and it can be easily imagined that various improvements and modifications are possible within the scope of the present invention without departing from the spirit of the present invention.

[0136] For example, in the case where a response is made only when a power outage occurs, the power management server 50 may not be provided.

[0137] In addition, when responding only to a power saving request from a power supply company, the storage battery 16 and the like may not be provided.

[0138] Furthermore, the power management server 50 does not have to be a server provided exclusively for the central air-conditioning system, but may be a server used for other systems.

[0139] In addition, the controller 10 in the first embodiment is described as an example in which one device includes the power detection unit 30, the power saving request unit 31, the power amount acquisition unit 32, the device control unit 33, the notification control unit 34, and the display unit 35, but is not limited thereto. For example, the power detection unit 30, the power saving request unit 31, the power amount acquisition unit 32, the device control unit 33, the notification control unit 34, and the display unit 35 may be configured in two or more devices. For example, the power detection unit 30, the power saving request unit 31, and the power amount acquisition unit 32 may be provided in a first device, and the device control unit 33, the notification control unit 34, and the display unit 35 may be provided in a second device, and the first device and the second device may communicate with each other, and the first device and the second device may cooperate to provide the function of the controller 10. Note that, although an example in which the controller 10 is configured in two devices has been described above, the controller 10 may be configured in three or more devices. In other words, each functional block of the controller 10 in the first embodiment may be distributed and arranged in two or more devices.

[0140] Similarly, the controller 10 in the second embodiment is described as an example in which one device includes the receiving unit 40, the power saving request unit 41, the device control unit 42, the notification control unit 34, and the display unit 35, but is not limited thereto. For example, the receiving unit 40, the power saving request unit 41, the device control unit 42, the notification control unit 34, and the display unit 35 may be configured in two or more devices. For example, the first device may include the receiving unit 40 and the power saving request unit 41, and the second device may include the device control unit 42, the notification control unit 34, and the display unit 35, and the first device and the second device may communicate with each other, and the first device and the second device may cooperate to provide the function of the controller 10. Note that, although an example in which the controller 10 is configured in two devices has been described above, the controller 10 may be configured in three or more devices. In other words, each functional block of the controller 10 in the second embodiment may be distributed and arranged in two or more devices.

[0141] Similarly, the functional blocks of the controller 10 in other embodiments may also be distributed and arranged in two or more devices.

[0142] Moreover, the exhaust port 21 may be provided in the air-conditioned room 14 instead of in the living room 2. In this case, the air exhausted from the exhaust port 21 passes through the heat exchange type ventilation device 17 and is discharged to the outdoors.

[0143] (Summary of the invention) The central air conditioning system of the present invention includes a central air conditioning device that conditions the air in an air-conditioned room and transports the conditioned air from the air-conditioned room to multiple air-conditioned spaces, and performs power-saving processing on the central air conditioning device based on a reduction request to reduce power usage, such that after the reduction request is received, the air from the air-conditioned room is not transported to all of the multiple air-conditioned spaces, but is transported only to a specific air-conditioned space. This makes it possible to appropriately reduce the amount of power consumed when power saving is necessary.

[0144] Also, a power management server may be provided that receives a power saving request from a power supply company, selects an area that corresponds to the power saving request based on the received power saving request, and transmits a reduction request to the central air conditioners that belong to the selected area. This makes it possible to respond to the power saving request from the power supply company. Also, by saving power in response to the power saving request from the power supply company, a reward according to the amount of power saved can be obtained.

[0145] The central air conditioning system may include an air conditioner that adjusts the temperature of the air in the air-conditioned room, and a transport unit that transports the air that has been temperature-adjusted by the air conditioner to each of a number of spaces to be air-conditioned, and may control the transport unit so that the air in the air-conditioned room is transported only to specific spaces to be air-conditioned as a power-saving process. This allows the amount of power to be appropriately reduced in situations where power saving is necessary.

[0146] In addition, a human detection unit may be provided that detects people in multiple air-conditioned spaces, and a specific air-conditioned space may be determined based on information detected by the human detection unit. This allows the amount of power to be appropriately reduced in situations where power saving is required. Furthermore, because a specific air-conditioned space is determined based on information detected by the human detection unit, the amount of power can be appropriately reduced while suppressing a decrease in the comfort of residents who require air conditioning.

[0147] In addition, a storage battery may be provided as a power supply source for the central air conditioner that is separate from the power supply from the power supply company, and a reduction request may be issued when a power outage state in which there is no power supply from the power supply company is detected. This allows the amount of power to be appropriately reduced in a situation in which a power outage occurs and it is necessary to save power from the storage battery.

[0148] Furthermore, when a reduction request is made during a power outage, the power saving process transports air from the air-conditioned room to the specific air-conditioned space, and the specific air-conditioned space may be determined based on the remaining power level of the storage battery. This allows appropriate control to be performed according to the remaining level of the storage battery. The available time can be extended when the remaining level of the storage battery is low. A balance can be achieved between suppressing a decrease in comfort and the available time of the storage battery. In other words, when the remaining level is high, an operation that prioritizes suppressing a decrease in comfort can be performed, and when the remaining level is low, an operation that prioritizes the available time of the storage battery can be performed.

[0149] Furthermore, during power saving processing, the specific air conditioned space may be changed over time, thereby making it possible to prevent deviation from the target temperature of each air conditioned space.

[0150] In addition, the specific air conditioned space may be selected from all air conditioned spaces in order of priority and may be changed over time. This makes it possible to suppress deviation from the target temperature of each air conditioned space. Also, for air conditioned spaces with high priority, deviation from the target temperature can be suppressed even more.

[0151] In addition, when the air conditioned space with the lowest priority is selected in the selection of a specific air conditioned space, the air conditioned space with the highest priority may be selected again the next time. This makes it possible to continue preventing deviation from the target temperature of each air conditioned space.

[0152] Also, the heat exchange type ventilation device includes an intake air fan that transports outdoor air to an air-conditioned room as an intake air flow, an exhaust air fan that transports air from a plurality of air-conditioned spaces to the outdoors as an exhaust air flow, and a heat exchange element that exchanges heat between the intake air flow and the exhaust air flow, and when performing power saving processing, the air volume of at least one of the intake air fan and the exhaust air fan may be set to a predetermined volume or less. This allows further reduction in the amount of power in a situation where power saving is required. Also, by reducing at least one of the intake air volume and the exhaust air volume, the air conditioning load can be prevented from increasing, and therefore the amount of power consumed by the air conditioner, etc. can be reduced.

[0153] The heat exchange type ventilation device is equipped with an intake fan that transports outdoor air to the air-conditioned room as an intake air flow, and an exhaust fan that transports air from multiple air-conditioned spaces to the outdoors as an exhaust air flow. The air conditioner may further include an exhaust fan for exhausting the air from the exhaust port and a heat exchange element for exchanging heat between the intake air flow and the exhaust air flow, and when performing power saving processing, the air volume of at least one of the intake air flow fan and the exhaust air flow fan may be set to a predetermined volume or less, and the predetermined volume may be determined based on the remaining power of the storage battery. This allows further reduction in the amount of power in a situation where power saving is required. In addition, by reducing at least one of the intake air volume and the exhaust air volume, the air conditioning load can be prevented from increasing, and the amount of power consumed by the air conditioner, etc. can be reduced. A balance can be achieved between suppressing a decrease in comfort and the available time of the storage battery. In other words, when the remaining power is large, an operation that prioritizes suppressing a decrease in comfort can be performed, and when the remaining power is small, an operation that prioritizes the available time of the storage battery can be performed.

[0154] In addition, the conditioned air in the air-conditioned room may be transported to an indoor space outside the air-conditioned room, and the air in the indoor space outside the air-conditioned room may be transported to each of a plurality of spaces to be air-conditioned. This makes it possible to realize whole-building air conditioning in various ways, for example, without using ducts.

[0155] In addition, air from an indoor space outside the air-conditioned room may be transported to the space to be air-conditioned via at least one of an air intake vent, an air intake fan, and a louver. This allows for various methods of achieving central air conditioning, such as without using ducts.

[0156] In addition, when air from an indoor space outside the air-conditioned room is transported to a space to be air-conditioned through an air supply port, the opening of the air supply port may be controlled so that air from the air-conditioned room is transported only to a specific space to be air-conditioned, as a power-saving process. This allows the amount of power to be appropriately reduced in situations where power saving is required, for example, in a whole-building air-conditioning system that does not use ducts.

[0157] In addition, when air from an indoor space outside an air-conditioned room is transported to a space to be air-conditioned through a louver, the opening of the louver may be controlled so that air from the air-conditioned room is transported only to a specific space to be air-conditioned as a power-saving process. This allows the amount of power to be appropriately reduced in situations where power saving is required, for example, in a whole-building air-conditioning system that does not use ducts.

[0158] In addition, when air from an indoor space outside the air-conditioned room is transported to a space to be air-conditioned via an air supply fan, the air supply fan may be controlled so that air from the air-conditioned room is transported only to a specific space to be air-conditioned as a power saving process. This allows the amount of power to be appropriately reduced in situations where power saving is required, for example, in a whole-building air-conditioning system that does not use ducts.

[0159] Also, a notification control unit may be provided that notifies the user that the temperature difference is large if the temperature difference between the specific air-conditioned space to which the air from the air-conditioned room is transported and the air-conditioned space to which the air from the air-conditioned room is not transported is equal to or greater than a predetermined temperature during the power saving process. This allows the user to understand that the temperature difference between the specific air-conditioned space and the air-conditioned space to which the air from the air-conditioned room is not transported is large. Therefore, the user can take measures in advance to deal with the large temperature difference.

[0160] Furthermore, when the air-conditioned space to which the air from the air-conditioned room is not transported is a changing room, the notification control unit may notify the user that there is a risk of heat shock due to the temperature difference if the temperature difference is equal to or greater than a predetermined temperature. This allows the user to understand that the temperature difference between the specific air-conditioned space and the changing room is large. Therefore, measures can be taken in advance to deal with the large temperature difference. In other words, the occurrence of heat shock can be suppressed.

[0161] In addition, when a reduction request is made during a power outage, power saving processing may be performed only during the power saving processing period desired by the user. This allows power saving processing to be performed appropriately according to the user's living conditions. Since power saving processing can be performed in accordance with the user's actual living conditions, it is possible to prevent a decrease in user comfort.

[0162] In addition, when a reduction request is made during a power outage, the presence history information of the user is acquired, and a power saving period during which the power saving process is performed is determined based on the presence history information, and the power saving process is performed only during the power saving process period. This allows the power saving process to be performed preferentially when the user is not present in a situation where power saving is necessary, so that the amount of power can be appropriately reduced while suppressing the comfort of the user. [Industrial Applicability]

[0163] INDUSTRIAL APPLICABILITY The present invention is useful as a central air-conditioning system including an air conditioner and a transport unit. [Explanation of symbols]

[0164] 1. Housing 2, 2a, 2b, 2c, 2d living room 3, 3a, 3b, 3c, 3d conveyor fan 4, 4a, 4b, 4c, 4d outlet 5 Air conditioner 10 Controller 11, 11a, 11b, 11c, 11d Room temperature sensor 12, 12a, 12b, 12c, 12d Room occupancy sensor 13 Air-conditioning room temperature sensor 14 Air conditioned room 15, 15a, 15b, 15c, 15d Conveying duct 16 Storage battery 17 Heat exchange type ventilation equipment 18. Air supply fan 19 Exhaust fan 20 Heat exchange element 21, 21a, 21b, 21c, 21d Exhaust port 22 Distribution board 30 Power detection unit 31 Power saving request section 32 Electric energy acquisition section 33 Equipment control section 34 Notification control section 35 Display section 40 Receiving section 41 Power saving request section 42 Equipment control section 50 Power Management Server 60 Storage section 61 Implementation Period Receiving Department 70 Implementation Period Decision Division 71 Room occupancy information storage unit 72 Occupancy information acquisition department 80 Opening and closing shutter 81 Fans 82 Air supply fan

Claims

1. A central air conditioning device that conditions air in an air-conditioned room and transports the conditioned air from the air-conditioned room to a plurality of spaces to be air-conditioned, This central air conditioning system performs power saving processing on the central air conditioning device by transporting air from the air-conditioned room to only specific air-conditioned spaces after a reduction request is made based on a reduction request to reduce power usage.

2. The central air conditioning system of claim 1 further comprising a power management server that receives a power saving request from an electric power supply company, selects an area that is the target of the power saving request based on the received power saving request, and transmits the reduction request to the central air conditioning device that belongs to the selected area.

3. The central air conditioning device is An air conditioner that adjusts the temperature of the air in the air-conditioned room, and a transport unit that transports the air that has been temperature-adjusted by the air conditioner to each of a plurality of target spaces for air conditioning, The central air-conditioning system according to claim 1 , wherein the power saving process is performed by controlling the transport unit so that the air in the air-conditioned room is transported only to the specific space to be air-conditioned.

4. A human detection unit is provided to detect humans in the plurality of air-conditioned spaces, The central air-conditioning system according to claim 1 , wherein the specific air-conditioned space is determined based on detection information by the human detection unit.

5. a storage battery that is a power supply source for the central air conditioning device that is different from the power supply from a power supply company; The central air-conditioning system according to claim 1 , wherein the reduction request is made when a power outage state in which there is no power supply from the power supply company is detected.

6. When the reduction request is made during the power outage, The power saving process includes: Transporting air from the air-conditioned room to the specific space to be air-conditioned; The central air-conditioning system according to claim 5 , wherein the specific space to be air-conditioned is determined based on a remaining amount of power in the storage battery.

7. During the power saving process, The central air-conditioning system according to claim 1 , wherein the specific air-conditioned space is changed over time.

8. The central air-conditioning system according to claim 7 , wherein the specific air-conditioned space is selected from all air-conditioned spaces in order of priority and is changed over time.

9. In selecting the specific air-conditioned space, The central air-conditioning system according to claim 8 , wherein when the air-conditioned space with the lowest priority is selected, the air-conditioned space with the highest priority is selected again next time.

10. Equipped with a heat exchange ventilation system, The heat exchange type ventilation device includes: an intake air fan that transports outdoor air to the air-conditioned room as an intake air flow; an exhaust fan that transports air from the plurality of air-conditioned spaces to the outdoors as an exhaust flow; a heat exchange element for exchanging heat between the intake air flow and the exhaust air flow, When performing the power saving process, 2. The central air-conditioning system according to claim 1, wherein the blowing volume of at least one of the supply air fan and the exhaust air fan is set to a predetermined volume or less.

11. Equipped with a heat exchange ventilation system, The heat exchange type ventilation device includes: an intake air fan that transports outdoor air to the air-conditioned room as an intake air flow; an exhaust fan that transports air from the plurality of air-conditioned spaces to the outdoors as an exhaust flow; a heat exchange element for exchanging heat between the intake air flow and the exhaust air flow, When performing the power saving process, setting the air volume of at least one of the intake air fan and the exhaust air fan to a predetermined volume or less; The central air-conditioning system according to claim 5 , wherein the predetermined air volume is determined based on a remaining amount of power in the storage battery.

12. The conditioned air in the air-conditioned room is transported to an indoor space outside the air-conditioned room; The central air-conditioning system according to claim 1 , wherein air in an indoor space outside the air-conditioned room is transported to each of a plurality of spaces to be air-conditioned.

13. The central air-conditioning system according to claim 12 , wherein air in an indoor space outside the air-conditioned room is transported to the space to be air-conditioned via at least one of an air supply port, an air supply fan, and a louver.

14. When air in an indoor space outside the air-conditioned room is transported to the space to be air-conditioned through the air supply port, The central air-conditioning system according to claim 13, wherein the power saving process controls an opening of the air supply port so that air from the air-conditioned room is transported only to the specific space to be air-conditioned.

15. When the air in the indoor space outside the air-conditioned room is transported to the air-conditioned space through the louver, The central air-conditioning system according to claim 13, wherein the power saving process controls an opening of the louver so that air from the air-conditioned room is transported only to the specific space to be air-conditioned.

16. When the air in the indoor space outside the air-conditioned room is transported to the space to be air-conditioned via an air supply fan, The central air-conditioning system according to claim 13, wherein the power saving process controls the air supply fan so that air from the air-conditioned room is transported only to the specific space to be air-conditioned.

17. During the power saving process, The central air conditioning system of claim 1, further comprising an alarm control unit that, if the temperature difference between the temperature of the specific air-conditioned space to which the air from the air-conditioned room is transported and the temperature of the air-conditioned space to which the air from the air-conditioned room is not transported is equal to or greater than a predetermined temperature, notifies the user that the temperature difference is large.

18. When the air-conditioned space to which the air from the air-conditioned room is not transported is a dressing room, The notification control unit is 18. The central air-conditioning system according to claim 17, further comprising: a notification that there is a risk of heat shock due to the temperature difference if the temperature difference is equal to or greater than a predetermined temperature.

19. When the reduction request is made during the power outage, 6. The central air-conditioning system according to claim 5, wherein the power-saving process is performed only during a power-saving process period desired by a user.

20. Obtain user presence history information, When the reduction request is made during the power outage, determining a power saving process implementation period for performing the power saving process based on the occupancy history information; The central air-conditioning system according to claim 5 , wherein the power-saving process is performed only during the power-saving process implementation period.

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