Air conditioning system

Abstract

To provide an air conditioning system capable of continuously purifying air in a living room.SOLUTION: Air conditioning system 20 has a normal mode in which air-conditioned air is conveyed to a plurality of habitable rooms 2 at a predetermined air volume, and includes air conditioner 9 that is provided in air-conditioning room 18 independent of the plurality of habitable rooms 2 and that conditions air in air-conditioning room 18, conveying fan 3 that conveys the air-conditioned air conditioned by air conditioner 9 to the plurality of habitable rooms 2, and a thermo-off timer that measures a time elapsed from when air conditioner 9 is thermo-off. When the time measured by the thermo-off timer is equal to or greater than a predetermined thermo-off time threshold, the air conditioning system (20) switches to an airflow volume increase mode in which the airflow volume of the delivery fan (3) is increased to be greater than the airflow volume in the normal mode.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to air conditioning systems. [Background technology]

[0002] Conventionally, an air conditioning system for conditioning multiple rooms is known, such as that disclosed in Patent Document 1. In Patent Document 1, a central air conditioning system uses an air conditioner to adjust the temperature of air taken in from outside the facility (outside air) or air taken in from inside the facility (inside air). The system controls the temperatures of multiple rooms by transporting the conditioned air to each of the multiple rooms in the facility using a transport fan.

[0003] Patent Document 1 also discloses a configuration in which a filter is installed in the central air-conditioning system, and air taken in from inside the facility (internal air) is filtered by the filter and then returned to the facility. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-115500 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional air conditioning systems, the operation of the air conditioner and transport fan is temporarily stopped when each room reaches a comfortable temperature in order to save energy. However, because the amount of air circulating from the room is reduced when the transport fan operation is temporarily stopped, there is a possibility that the filter will not be able to filter the air sufficiently if the air in the room is polluted. For this reason, conventional air conditioning systems have room for improvement in terms of continuously purifying the air in the room.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an air conditioning system that can continuously purify the air in a room. [Means for solving the problem]

[0007] In order to solve the above problems, an air conditioning system according to one aspect of the present disclosure has a normal mode in which conditioned air is delivered to a plurality of rooms at a predetermined air volume, the air conditioning system including: an air conditioner provided in an air-conditioning room independent of the plurality of rooms for conditioning the air in the air-conditioning room; a delivery fan for delivering the conditioned air delivered by the air conditioner to the plurality of rooms; and a thermo-off timer for measuring the time elapsed since the thermo-off of the air conditioner. When the time measured by the thermo-off timer reaches or exceeds a predetermined thermo-off time threshold, the air conditioning system switches to an increased air volume mode in which the air volume of the delivery fan is increased above the air volume in the normal mode.

[0008] Any combination of the above components, and conversion of the present disclosure into a method, device, system, recording medium, computer program, etc., are also valid aspects of the present disclosure. [Effects of the Invention]

[0009] According to the present disclosure, an air conditioning system capable of continuously purifying the air in a room can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram of an air conditioning system according to the present disclosure. [Figure 2] FIG. 2 is a functional block diagram of a system controller. [Figure 3] FIG. 2 is a functional block diagram of a first control unit of the system controller. [Figure 4] FIG. 2 is a functional block diagram of a second control unit of the system controller. [Figure 5] 4 is a flowchart showing control of the air conditioning system. [Figure 6]10 is a flowchart showing a mode switching determination based on a thermostat-off state of an air conditioner. [Figure 7] 10 is a flowchart showing a mode switching determination based on the airflow rate of a transport fan. [Figure 8] 10 is a flowchart showing a mode switching determination based on the presence or absence status of a room. [Figure 9] 10 is a flowchart showing an air volume increase process in an air volume increase mode. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the following embodiments are examples that embody the present disclosure and do not limit the technical scope of the present disclosure. Furthermore, throughout the drawings, identical components are designated by the same reference numerals, and their description will be omitted. Furthermore, in each drawing, detailed descriptions of components that are not directly related to the present invention will be omitted. [Example] First, an air conditioning system 20 according to a first embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is a schematic diagram of the air conditioning system 20 according to the present disclosure. In Fig. 1, the air path through which air flows into an air-conditioned room 18 is represented by a dashed line, and the air path through which air flows out of the air-conditioned room 18 is represented by a solid line.

[0012] The air conditioning system 20 is configured to include an outside air intake fan 4, multiple transport fans 3 (transport fans 3a, 3b), a room temperature sensor 11 (room temperature sensors 11a, 11b, 11c, 11d, 11e), a CO2 concentration sensor 12 (CO2 concentration sensors 12a, 12b, 12c, 12d, 12e), a filter 13, an air-conditioned room temperature sensor 14, an air conditioner 9, and a system controller 10.

[0013] The air conditioning system 20 is installed in a typical home 1, which is an example of a building. The typical home 1 has multiple (five in this embodiment) living rooms 2 (living rooms 2a, 2b, 2c, 2d, and 2e) and at least one air-conditioning room 18 that is independent of the living rooms 2. The air-conditioning system 20 performs whole-house air conditioning for the typical home 1 by transporting air conditioned in the air-conditioning room 18 to each living room 2. Here, the typical home 1 (house) is a dwelling provided as a place for residents to live private lives, and the living rooms 2 typically include a living room, dining room, bedroom, private room, children's room, etc. The living rooms provided by the air-conditioning system 20 may also include a toilet, bathroom, washroom, dressing room, etc. The typical home 1 may also have a common space that is ventilated between the air-conditioning room 18 and the living rooms 2. Here, the common space includes a hallway, entrance, etc. In other words, the typical home 1 may have a structure in which the living rooms 2 and the air-conditioning room 18 are ventilated and connected to each other via the common space. Furthermore, the number of living rooms 2 in the general residence 1 is not limited to five. The number of living rooms 2 may be five or more, or may be less than five. In the present disclosure, as an example, living rooms 2a, 2b, and 2c are located on the first floor of the general residence 1, and living rooms 2d and 2e and the air-conditioning room 18 are located on the second floor.

[0014] In the air-conditioning room 18, the air conveyed from each living room 2 is mixed. In addition, outside air is taken into the air-conditioning room 18 by the outside air introduction fan 4. In other words, in the air-conditioning room 18, the air conveyed from each living room 2 and the outside air taken in by the outside air introduction fan 4 are mixed. The temperature of the air in the air-conditioning room 18 is controlled by an air conditioner 9 installed in the air-conditioning room 18. The air conditioned by the air conditioner 9 is purified by a filter 13 arranged downstream of the air conditioner 9. The air conditioned and purified in the air-conditioning room 18 in this way is conveyed to each living room 2 by the conveying fan 3. In other words, by circulating air between the living room 2 and the air-conditioning room 18, The air in the living rooms 2 is purified by the filters 13, which can prevent contamination of the air in the living rooms 2. Here, the air-conditioned room 18 means a space with a certain size in which the air conditioner 9 can be placed and the air conditioning of each living room 2 can be controlled, but it is not intended as a living space and does not basically mean a room where residents stay.

[0015] Air from each living room 2 is transported to the air-conditioning room 18 via circulation ports 6 (6a, 6b, 6c, 6d, 6e) provided in each living room 2. Here, circulation port 6a corresponds to living room 2a, circulation port 6b corresponds to living room 2b, circulation port 6c corresponds to living room 2c, circulation port 6d corresponds to living room 2d, and circulation port 6e corresponds to living room 2e. In the present disclosure, when air is sent from the air-conditioning room 18 to living room 2, the air originally in living room 2 is pushed out and transported to the air-conditioning room 18 via the circulation ports 6. The circulation ports 6 are openings provided in the wall or ceiling of the living room 2, and the air that passes through the circulation ports 6 is transported to the air-conditioning room 18 via, for example, a duct. Note that the living room 2 and the air-conditioning room 18 do not need to be directly connected to allow ventilation. For example, the circulation port 6 may be provided as a louver that connects the common space and the living room 2 to allow ventilation, so that the air from the living room 2 is transported through the common space to the air-conditioning room 18. Also, a circulation fan may be installed in the circulation port 6, so that the air from the living room 2 is forcibly transported to the air-conditioning room 18.

[0016] The outside air introduction fan 4 is a fan that takes in outside air into the room of the general house 1, and corresponds to the air supply function of an air supply fan or a heat exchange fan. The outside air introduction fan 4 takes in outside air, which is air outside the general house 1, from an outside air port 50 provided in the wall of the general house 1, for example. The outside air taken in by the outside air introduction fan 4 flows into the air-conditioned room 18. The intake air volume of the outside air introduction fan 4 can be set in multiple stages.

[0017] Alternatively, exhaust fans may be installed in each living room 2 to exhaust the air from the living room 2 to the outside of the general residence 1. Exhaust fans are fans that exhaust a portion of the air in the corresponding living room 2 as outside air, and examples include ceiling-mounted exhaust fans, wall-mounted exhaust fans, range hoods, and heat exchange fans. Controlling the exhaust fan's exhaust airflow rate to exhaust outside air from the room and controlling the intake airflow rate of the outside air intake fan 4 in conjunction with the exhaust fan's exhaust airflow rate to draw outside air into the room achieves Type 1 ventilation. Note that exhaust fans may be installed in any manner as long as they can exhaust air from each living room 2. For example, installing an exhaust fan in a common space that is ventilated and connected to each living room 2 to exhaust air from the common space is also considered to be exhausting air from each living room 2. Furthermore, when exhausting air from each living room 2, heat exchange may be performed between the outside air taken in by the outside air intake fan 4 and the air exhausted by the exhaust fan.

[0018] The transport fans 3 (3a, 3b) are provided, for example, on the wall of the air-conditioning room 18 corresponding to each living room 2. In the present disclosure, as an example, living rooms 2a, 2b, and 2c are located on the first floor of the general residence 1, and living rooms 2d and 2e and the air-conditioning room 18 are located on the second floor. The transport fan 3a corresponds to the first floor of the general residence 1, and the transport fan 3b corresponds to the second floor of the general residence 1. In other words, air from the air-conditioning room 18 is transported by the transport fan 3a to living rooms 2a, 2b, and 2c via a transport duct, and by the transport fan 3b to living rooms 2d and 2e via a transport duct. An air outlet 5a is provided in living room 2a, an air outlet 5b is provided in living room 2b, and an air outlet 5c is provided in living room 2c. An air outlet 5d is provided in living room 2d, and an air outlet 5e is provided in living room 2e. The air in the air-conditioned room 18 blown out by the transfer fan 3 passes through the transfer duct and is blown out from the air outlet 5 into the living room 2.

[0019] Here, in order to individually adjust the volume of air sent to each room 2, air volume adjustment dampers 7 are provided in the air-conditioning room 18. Air volume adjustment damper 7a is a damper corresponding to room 2a, and adjusts the volume of air blown out from transport fan 3a. Air volume adjustment damper 7b is a damper corresponding to room 2b, and adjusts the volume of air blown out from transport fan 3a. Damper 7c is a damper corresponding to living room 2c and adjusts the amount of air blown out from transport fan 3a. Air volume adjustment damper 7d is a damper corresponding to living room 2d and adjusts the amount of air blown out from transport fan 3b. Air volume adjustment damper 7e is a damper corresponding to living room 2e and adjusts the amount of air blown out from transport fan 3b. Note that a configuration in which separate transport fans 3 are installed corresponding to each living room 2 may be used as a means for individually adjusting the amount of air blown to each living room 2.

[0020] The air conditioner 9 controls the air conditioning of the air-conditioned room 18. The air conditioner 9 cools or heats the air in the air-conditioned room 18 so that the temperature of the air in the air-conditioned room 18 reaches a set target temperature (air-conditioned room target temperature). In the present disclosure, the air conditioner 9 is installed in the air-conditioned room 18 to control the air conditioning of the air-conditioned room 18, but a humidifier, dehumidifier, or the like may also be installed as a means for air-conditioning the air-conditioned room 18.

[0021] Living room temperature sensor 11a is provided in living room 2a, living room temperature sensor 11b is provided in living room 2b, living room temperature sensor 11c is provided in living room 2c, living room temperature sensor 11d is provided in living room 2d, and living room temperature sensor 11e is provided in living room 2e. Living room temperature sensors 11a to 11e are sensors that acquire the indoor temperatures of the corresponding living rooms 2a to 2e and transmit them to system controller 10.

[0022] The CO2 concentration sensor 12a is provided in the living room 2a, the CO2 concentration sensor 12b is provided in the living room 2b, the CO2 concentration sensor 12c is provided in the living room 2c, the CO2 concentration sensor 12d is provided in the living room 2d, and the CO2 concentration sensor 12e is provided in the living room 2e. The CO2 concentration sensors 12a to 12e are sensors that acquire the CO2 concentrations in the corresponding living rooms 2a to 2e and transmit the acquired values ​​to the system controller 10.

[0023] The air-conditioned room temperature sensor 14 is a sensor that acquires the temperature of the air in the air-conditioned room 18 and transmits it to the system controller 10. The air-conditioned room temperature sensor 14 acquires the temperature of the air in the air-conditioned room 18, which is a mixture of outside air and air transported from each room 2. Although FIG. 1 illustrates an example in which the air-conditioned room temperature sensor 14 is independent of the air conditioner 9, it may also be configured to be built into the air conditioner 9. In this case, the temperature of the air in the air-conditioned room 18 is acquired by detecting the temperature of the air sucked into the air conditioner 9. The acquired temperature of the air in the air-conditioned room 18 is transmitted to the system controller 10.

[0024] The system controller 10 is a controller that controls the entire air conditioning system 20. The system controller 10 is communicably connected to the outside air intake fan 4, the transport fan 3, the room temperature sensor 11, the CO2 concentration sensor 12, the air-conditioned room temperature sensor 14, and the air conditioner 9. Here, "communicable" may be wireless or wired. In FIG. 1, the system controller 10 is installed in the room 2a as a wall-mounted remote controller, and is communicably connected to each device wirelessly.

[0025] The system controller 10 controls the air conditioner 9 based on the temperature of the air in the air-conditioned room 18 obtained by the air-conditioned room temperature sensor 14 so that the temperature in the air-conditioned room 18 becomes the air-conditioned room target temperature set for the air-conditioned room 18.

[0026] Furthermore, the system controller 10 sets the airflow rate of the transport fan 3 according to the room temperature of each room 2 acquired by the room temperature sensor 11 and the target temperature (room target temperature) set for each room 2a to 2e. If a circulation fan is provided at the circulation port 6 in addition to the transport fan 3, the system controller 10 may also set the airflow rate of the circulation fan.

[0027] As a result, the air conditioned in the air-conditioning room 18 is transported to each room 2 at the air volume set in each transport fan 3. In addition, by sending the air from the air-conditioning room 18 to each room 2, the air that was originally present in each room 2 is pushed out and circulated to the air-conditioning room 18 through each circulation port 6. By transporting the conditioned air in 18, the room temperature of each room 2 is controlled to the room target temperature.

[0028] Information necessary for constructing the air conditioning system 20 is input and stored in the system controller 10. The necessary information here includes, for example, the room target temperature and room CO2 concentration of each room 2. This information may be input directly to the system controller 10 or may be input via an input terminal 19 such as a smartphone or tablet.

[0029] Next, each function of the system controller 10 will be described with reference to Figures 2, 3, and 4. Figure 2 is a schematic functional block diagram of the system controller 10. As shown in Figure 2, the system controller 10 has a first control unit 61 and a second control unit 62. Figure 3 is a schematic functional block diagram of the first control unit 61, and Figure 4 is a schematic functional block diagram of the second control unit 62.

[0030] The function of the first control unit 61 will be described in more detail with reference to Figure 3. The first control unit 61 is a control unit that controls the normal mode of the air conditioning system 20. Here, the normal mode is control that is executed by default in the air conditioning system 20. In the normal mode, the temperature of each room 2 is controlled based on the temperature of each room 2 acquired by the room temperature sensor 11, the temperature of the air-conditioned room 18 acquired by the air-conditioned room temperature sensor 14, and the room target temperature input to the system controller 10. The first control unit 61 includes a room target temperature acquisition unit 54, an air-conditioned room temperature control unit 55, an airflow rate determination unit 40, a fan airflow rate control unit 31, and a memory unit 46.

[0031] The room target temperature acquisition unit 54 acquires the room target temperatures set for each room 2 via the input terminal 19. In the present disclosure, the lowest room target temperature set for each room 2 is defined as the minimum target temperature, and the highest room target temperature is defined as the maximum target temperature. Here, when the air conditioner 9 is in cooling operation, the air-conditioned room target temperature is determined based on the minimum target temperature, and when the air conditioner 9 is in heating operation, the air-conditioned room target temperature is determined based on the maximum target temperature. In this embodiment, the room target temperature coincides with the air-conditioned room target temperature. Note that the air-conditioned room target temperature may be set taking into account temperature fluctuations that occur when the transport fan transports air from the air-conditioned room 18 to the room 2. For example, when the air conditioner 9 is in cooling operation, the temperature may be set to a temperature lower than the minimum target temperature, and when the air conditioner 9 is in heating operation, the temperature may be set to a temperature higher than the maximum target temperature. Furthermore, although the present disclosure allows the user to set the room target temperature via the input terminal 19, the room target temperature may also be set in advance in the system controller 10. The maximum target temperature and the minimum target temperature acquired by the room target temperature acquisition unit 54 or set in advance are stored in the memory unit 46.

[0032] The air-conditioned room temperature control unit 55 uses the air conditioner 9 to control the temperature in the air-conditioned room to the air-conditioned room target temperature acquired by the room target temperature acquisition unit 54. Specifically, if the air-conditioned room temperature acquired by the air-conditioned room temperature sensor 14 has not reached the air-conditioned room target temperature, the air conditioner 9 is operated.

[0033] The airflow rate determination unit 40 includes a temperature judgment unit 53, a temperature difference comparison unit 56, and a high / low judgment unit 57. The airflow rate determination unit 40 determines the airflow rate of the transport fan 3 based on the indoor temperatures of each room acquired by the room temperature sensor 11 and the temperature of the air-conditioned room 18 acquired by the air-conditioned room temperature sensor 14. The procedure for determining the airflow rate will be described later.

[0034] The temperature determination unit 53 determines whether the indoor temperature of each room 2 has reached the room target temperature based on the indoor temperature of each room 2 acquired by the room temperature sensor 11, the room target temperature acquired by the room target temperature acquisition unit 54, and the air-conditioned room target temperature determined based on the room target temperature.

[0035] The temperature difference comparison unit 56 compares the room temperature of each room 2 acquired by the room temperature sensor 11 with the room target temperature. The difference between the temperature in the room 2a and the target room temperature acquired by the temperature acquisition unit 54 is calculated. Specifically, for example, if the temperature in the room 2a is 23 and the target room temperature is 25, the difference is 2.

[0036] The high / low determination unit 57 determines whether the indoor temperature of each room 2 acquired by the room temperature sensor 11 is high or low relative to the room target temperature acquired by the room target temperature acquisition unit 54. Specifically, for example, if the temperature of room 2a is 23°C and the room target temperature is 25°C, the temperature of room 2a is determined to be "lower" than the room target temperature of 25°C. On the other hand, if the temperature of room 2c is 27°C and the room target temperature is 25°C, the temperature of room 2c is determined to be "higher" than the room target temperature of 25°C. These determinations may be made for all rooms, or only for certain rooms 2. For example, a configuration may be adopted in which the determination is made for the room 2 with the highest target temperature when the air conditioner 9 is in heating operation, and only for the room 2 with the lowest target temperature when the air conditioner 9 is in cooling operation.

[0037] The fan airflow control unit 31 controls the airflow rate of each of the transport fans 3a, 3b provided corresponding to the plurality of rooms 2a to 2e to the airflow rate of each transport fan 3a, 3b determined by the airflow rate determination unit 40. The fan airflow control unit 31 may also adjust the opening degree of the airflow rate adjustment dampers 7a to 7e provided corresponding to the plurality of rooms 2a to 2e. The fan airflow control unit 31 increases the opening degree of the airflow rate adjustment dampers 7a to 7e for rooms where the airflow rate is to be increased, and decreases the opening degree of the airflow rate adjustment dampers 7 for rooms where the airflow rate is to be decreased.

[0038] The storage unit 46 is a so-called memory that stores the target temperature acquired by the room target temperature acquisition unit 54 or set in advance. The storage unit 46 is also used when it is necessary to store other information such as numerical values ​​for control by the system controller 10. For example, if a humidifier is employed in the air conditioning system 20, the storage unit 46 may additionally store a target humidity.

[0039] Next, the function of the second control unit 62 will be described in more detail with reference to FIG. 4. The second control unit 62 is a control unit that controls the increased airflow mode of the air conditioning system 20. Here, the increased airflow mode is a mode in which the rotation speed of the transport fan 3 is forcibly increased so that the airflow volume of the transport fan 3 is greater than that set in the normal mode. In other words, it is a control that increases the airflow volume of the transport fan 3 above that of the normal mode. The increased airflow mode is forcibly switched to when a predetermined condition is met while the air conditioning system 20 is operating. Here, the predetermined condition is determined based on the thermo-off status of the air conditioner 9, the airflow volume of the transport fan 3, the CO2 concentration in each room 2, etc. The conditions will be described in detail later. The second control unit 62 includes a thermo-off status acquisition unit 71, a thermo-off timer 74, an airflow volume acquisition unit 72, a low airflow timer 75, a CO2 concentration acquisition unit 73, a presence / absence determination unit 76, a mode switching unit 77, a duration setting unit 78, a memory unit 46, and a fan airflow control unit 31.

[0040] The thermo-off status acquisition unit 71 is communicatively connected to the air conditioner 9 and acquires the status of whether the thermo-off status of the air conditioner 9 is in the off state. In other words, the thermo-off status acquisition unit 71 acquires the operating status of the air conditioner 9.

[0041] The thermo-off timer 74 is a timer that measures the time that has elapsed since the air conditioner 9 was thermo-off. The thermo-off timer 74 starts counting when the operating status of the air conditioner 9 acquired by the thermo-off status acquisition unit 71 is thermo-off. When the time measured by the thermo-off timer 74 reaches or exceeds a predetermined thermo-off time threshold, the operation mode of the air conditioning system 20 is switched from normal mode to increased airflow mode. Here, the thermo-off time threshold is a numerical value that can be set appropriately based on the floor area of ​​each room 2, etc. The thermo-off time threshold is set in the system controller 10 at the time of factory shipment or when the air conditioning system 20 is installed. The thermo-off time threshold is stored in the memory unit 46, for example. The thermo-off time threshold can be changed using the input terminal 19, etc. It may be configured to be changeable.

[0042] The airflow volume acquisition unit 72 acquires the airflow volume of the conveying fan 3. In the present disclosure, as an example, the unit is communicatively connected to the conveying fan 3 and acquires the airflow volume set for the conveying fan 3. Note that the airflow volume of the conveying fan 3 may be acquired in any manner. For example, an airflow volume sensor that acquires the actual airflow volume blown out from the conveying fan 3 may be installed downstream of the outlet of the conveying fan 3, or the airflow volume may be acquired indirectly by acquiring the rotation speed of the conveying fan 3. Furthermore, it is not necessary to acquire an accurate numerical value for the airflow volume. It is sufficient to determine from the acquired information whether the airflow volume is equal to or less than a predetermined airflow threshold, which is a condition for activating the low airflow volume timer 75 described below. For example, consider a case where the airflow volume of the conveying fan 3 can be set to 10 levels, from lowest to highest, from airflow volumes 1 to 10. Here, airflow volumes 1 to 3 are airflow volumes equal to or less than the predetermined airflow threshold, and airflow volumes 4 to 10 are airflow volumes equal to or greater than the airflow threshold. In this case, if the setting of the conveying fan 3 is airflow volumes 1 to 3, it can be determined that the airflow volume is equal to or less than the airflow threshold. Therefore, acquiring the setting of the airflow rate of the transport fan 3 in this way is also included in "acquiring the airflow rate of the transport fan 3."

[0043] The low airflow timer 75 is a timer that measures the time elapsed since the airflow rate of the transport fan 3 falls below a predetermined airflow threshold. The low airflow timer 75 starts counting when the airflow rate of the transport fan 3 falls below the predetermined airflow threshold. In the present disclosure, the low airflow timer 75 starts counting when both the transport fan 3a and the transport fan 3b fall below their airflow thresholds. When the time measured by the low airflow timer 75 exceeds a predetermined low airflow time threshold, the operation mode of the air conditioning system 20 is switched from normal mode to increased airflow mode. Here, the low airflow time threshold is a value that can be appropriately set based on the floor area of ​​each room 2, etc. The low airflow time threshold is set in the system controller 10 at the time of factory shipment or installation of the air conditioning system 20. The low airflow time threshold is stored in, for example, the memory unit 46. The low airflow time threshold may be configured to be changeable using the input terminal 19, etc.

[0044] The CO2 concentration acquisition unit 73 acquires the CO2 concentration of each room 2 acquired by the CO2 concentration sensor 12 installed in each room 2.

[0045] The presence / absence determination unit 76 determines whether or not there are people in the multiple living rooms 2. For example, in the present disclosure, if the CO2 concentration of each living room 2 acquired by the CO2 concentration acquisition unit 73 is equal to or lower than a predetermined CO2 concentration threshold, it is determined that there are no people in each living room 2. In particular, if the CO2 concentrations in all living rooms 2 (rooms 2a to 2e in the present disclosure) are equal to or lower than the CO2 concentration threshold, it is determined that there are no people in the general residence 1. Here, the CO2 concentration threshold is a value that can be appropriately set based on the floor area of ​​each living room 2, etc. The CO2 concentration threshold is set in the system controller 10 at the time of factory shipment or when the air conditioning system 20 is installed. The CO2 concentration threshold is stored in, for example, the memory unit 46. The CO2 concentration threshold may be configured to be changeable using the input terminal 19, etc.

[0046] In the present disclosure, as an example, the presence / absence determination unit 76 determines whether or not there is a person in each of the multiple rooms 2 by acquiring CO2 concentrations, but this is not limiting. For example, the presence / absence determination unit 76 may determine whether or not there is a person in each of the multiple rooms 2 by measuring the temperature distribution in each of the rooms 2 and determining whether or not there is a temperature equivalent to a human body temperature. Determining whether or not there is a person in each of the multiple rooms 2 also includes the user manually inputting to the system controller 10 that they will be leaving the house, and the presence / absence determination unit 76 acquiring the information input by the user.

[0047] The mode switching unit 77 switches the operation mode of the air conditioning system 20. For example, when the time measured by the thermo-off timer 74 becomes equal to or greater than a predetermined thermo-off time threshold, the mode switching unit 77 switches the operation mode from the normal mode to the increased airflow mode. Note that when the time measured by the low airflow timer 75 becomes equal to or greater than a predetermined low airflow time threshold, the mode switching unit 77 switches the operation mode from the normal mode to the increased airflow mode. Alternatively, the operation mode may be switched from the normal mode to the increased airflow mode when the presence / absence determination unit 76 determines that no one is present in the plurality of rooms 2. Furthermore, the mode switching unit 77 switches from the increased airflow mode to the normal mode when the time set by the duration setting unit 78 described below has elapsed.

[0048] The duration setting unit 78 sets the duration for which the increased airflow mode will continue. Here, the duration for which the increased airflow mode will continue is a value that can be set appropriately based on the floor area of ​​each room 2, etc. The duration for which the increased airflow mode will continue is set in the system controller 10 at the time of factory shipment or installation of the air-conditioning system 20. The duration for which the increased airflow mode will continue is stored in the memory unit 46, for example. Note that the duration for which the increased airflow mode will continue may be configured to be changeable using the input terminal 19, etc.

[0049] The duration setting unit 78 may also be configured to calculate the duration of the increased airflow mode based on the airflow rate of the transport fan 3 and the size of each of the multiple living rooms 2. For example, the duration of the increased airflow mode is calculated based on the airflow rate of the transport fan 3 acquired by the airflow rate acquisition unit 72 and the floor area of ​​each living room 2 stored in the memory unit 46. With this configuration, the duration set by the duration setting unit can be corrected based on the airflow rate of the transport fan 3 and the floor area of ​​each living room 2. For example, by correcting the duration so that the greater the airflow rate of the transport fan 3, the shorter the duration will be, and the larger the floor area of ​​each living room 2, the longer the duration will be, thereby making it possible to purify each living room 2 within an appropriate time.

[0050] The display unit 80 may be configured to display the duration of the increased airflow mode set by the duration setting unit 78. Here, the display unit 80 is, for example, a liquid crystal panel of the system controller 10 or the screen of the user's input terminal 19. By configuring the display unit 80 to display the remaining time until switching to the normal mode in this way, the user can recognize the time required until the air in the living room 2 is purified, giving them a sense of security. The display unit 80 is not limited to the liquid crystal panel of the system controller 10 or the screen of the user's input terminal 19. For example, displaying the remaining time by voice from a speaker of the system controller 10 or the input terminal 19 is also included in displaying it on the display unit 80. Any configuration may be used as long as it allows the user to recognize the duration of the increased airflow mode.

[0051] The memory unit 46 may be the same as the first control unit 61. The memory unit 46 stores the air volume of the transport fan 3 before switching from the normal mode to the increased air volume mode. This allows the air volume stored in the memory unit 46 to be referenced when switching from the increased air volume mode to the normal mode, and the air volume can be restored to the original normal mode air volume.

[0052] The fan air volume control unit 31 is, for example, the same as the first control unit 61. When switching to the increased air volume mode, the second control unit 62 controls the transport fan 3 so that the air volume of the transport fan 3 in normal mode is equal to or greater than the air volume acquired by the air volume acquisition unit 72. For example, the transport fan 3 can be set to 10 levels of air volume from 1 to 10, and when the transport fan 3 is operating at air volume 3 in normal mode, the second control unit 62 controls the transport fan 3 so that the air volume is set to 4 or greater.

[0053] Next, the control of the air conditioning system executed by the system controller 10 will be described with reference to Fig. 5. Fig. 5 is a flowchart showing the control of the air conditioning system.

[0054] When the user starts the air conditioning system 20, the system controller 10 first acquires the room target temperature set on the input terminal 19 and stores it in the memory unit 46 (S101). Here, the room target temperature is a temperature at which the user feels comfortable. Of the room target temperatures set for each room 2, the lowest is defined as the minimum target temperature, and the highest is defined as the maximum target temperature. For example, in the case of cooling, the minimum target temperature is acquired as the air-conditioned room target temperature, and in the case of heating, the maximum target temperature is acquired as the air-conditioned room target temperature. The temperature is acquired as the target temperature of the air-conditioned room.

[0055] When the air-conditioned room target temperature is acquired, the air-conditioned room temperature control unit 55 uses the air-conditioned room temperature sensor 14 and the air conditioner 9 to set the temperature of the air conditioner 9 so that the temperature of the air-conditioned room 18 approaches the range of the air-conditioned room target temperature (S102). Specifically, if the air-conditioned room temperature acquired by the air-conditioned room temperature sensor 14 has not reached the air-conditioned room target temperature, the air conditioner 9 is operated.

[0056] Next, the airflow rate determination unit 40 acquires the air-conditioned room temperature via the air-conditioned room temperature sensor 14 (S103). The airflow rate determination unit 40 also acquires the room temperature of each room 2 via the room temperature sensor 11 (S104).

[0057] Next, the airflow rate determination unit 40 determines whether the indoor temperature of each room 2 has reached the target room temperature based on the indoor temperature of each room 2 acquired by the room temperature sensor 11, the target room temperature acquired by the target room temperature acquisition unit 54, and the air-conditioned room target temperature determined based on the target room temperature (S105).

[0058] If all the rooms have reached the room target temperature (S105: YES), the process ends (END).

[0059] If at least one room has not reached the room target temperature (S105: NO), the temperature difference comparison unit 56 calculates the difference between the room temperature of that room and the room target temperature for that room (S106). Furthermore, the high / low determination unit 57 determines whether the room temperature of the corresponding room 2 is higher or lower than the target room temperature, i.e., whether the room temperature is high or low (S107). The high / low determination unit 57 determines whether the room temperature is high or low, and associates the rooms 2 (rooms 2a to 2e) that have not reached the target room temperature with the temperature difference compared by the temperature difference comparison unit 56. In other words, in this process, the airflow rate determination unit 40 can determine the number of rooms 2 that have reached the target room temperature and the number of rooms 2 that have not reached the target room temperature, and the difference between each room temperature and the target room temperature.

[0060] When the above process is completed, the airflow rate determination unit 40 performs an airflow rate determination process (S108). The airflow rate determination unit 40 determines the airflow rate of the transport fan 3 so that the airflow rate for the room 2 with a large temperature difference is large. The unit 40 also determines the opening degree of the airflow rate adjustment damper 7 based on the temperature difference.

[0061] For example, consider a case where there are two rooms (room 2c, room 2d) that have not reached the room target temperature. Here, assume that the temperature difference between room 2c and room 2d is 2 degrees and 4 degrees, respectively. In this case, airflow rate determination unit 40 sets the airflow rate of transport fan 3b corresponding to room 2d, which has a larger temperature difference, to be greater than the airflow rate of transport fan 3a corresponding to room 2c. For example, if the airflow rate of transport fan 3b can be set to 10 levels, from 1 to 10, in ascending order, airflow rate determination unit 40 determines the airflow rate of transport fan 3b to be 10, the maximum value. Then, airflow rate determination unit 40 determines the airflow rate of transport fan 3a to be, for example, 7, which is smaller than that of transport fan 3b. In addition, the opening degree of airflow rate adjustment damper 7d is set to be greater than the opening degree of airflow rate adjustment damper 7c.

[0062] As a result, air from air-conditioned room 18 flows into rooms 2c and 2d, and the room temperatures of rooms 2c and 2d gradually approach the room target temperature. At this time, the temperature of room 2d, which is more uncomfortable due to the difference in airflow rate and has a larger temperature difference from the room target temperature, improves at a faster rate than the temperature of room 2c, which has a smaller temperature difference from the room target temperature than room 2d. In other words, airflow rate determination unit 40 prioritizes improving the temperature environment of room 2, which has a worse thermal environment.

[0063] In addition, the room target temperature has already been reached for rooms 2a, 2b, and 2e. There is no need to condition the air more than necessary. In such cases, the opening degrees of air volume adjustment dampers 7a, 7b, and 7e are set smaller than the opening degrees of air volume adjustment dampers 7c and 7d. By controlling in this manner, the amount of air from air-conditioned room 18 transported to rooms 2a, 2b, and 2e can be made smaller than that to rooms 2c and 2d. Note that if a configuration is used in which one transport fan 3 corresponds to each room 2, the airflow rate of transport fan 3 can be controlled individually for each room 2.

[0064] Such control of S101 to S108 corresponds to the operation control in normal mode. The control corresponding to S101 to S108 makes the temperature environment of the entire general house 1 comfortable. As described in S105, if all of the rooms 2 have reached the room target temperature, there is no need to air-condition more than necessary. In such a case, the air conditioner 9 may be thermo-off to improve the energy efficiency of the air-conditioning system 20, or the air volume of the transport fan 3 (3a, 3b) may be reduced. For example, if the air volume can be set to 10 in 10 stages from smallest to largest, the transport fan 3 is set to air volume 1.

[0065] In this way, when the air conditioner 9 is turned off thermostat or the airflow rate of the transport fan 3 is reduced, the amount of air circulating from the room decreases, and if the air in the room is polluted, there is a possibility that the filter will not be able to filter it sufficiently. Therefore, the air conditioning system 20 of the present disclosure has an increased airflow rate mode, which is separate from the normal mode, in which the rotation speed of the transport fan 3 is forcibly increased so that the airflow rate of the transport fan 3 is greater than that set in the normal mode. Switching between the normal mode and the increased airflow rate mode is performed by a mode switching determination process (S200). The mode switching determination process and the increased airflow rate mode will be described in detail below with reference to Figure 6. Here, Figure 6 is a flowchart for when mode switching determination is performed based on the thermostat-off status of the air conditioner.

[0066] First, the system controller 10 acquires the operating state of the air conditioner 9 through the thermo-off state acquisition unit 71 (S201).

[0067] Next, the system controller 10 determines whether the operating state of the air conditioner 9 is in the thermo-off state (S202). If the air conditioner 9 is in the thermo-off state (S202: YES), the thermo-off timer 74 is counted up (S203). In other words, the thermo-off timer 74 measures the time that the thermo-off state continues. Here, if the air conditioner 9 is not in the thermo-off state (S202: NO), the thermo-off timer 74 is reset and the process ends (S204, END).

[0068] Next, the system controller 10 determines whether the time measured by the thermo-off timer 74 is equal to or greater than a predetermined thermo-off time threshold (S205). If the time measured by the thermo-off timer 74 is equal to or greater than the thermo-off time threshold (S205: YES), the mode switching unit 77 switches the operation mode of the air conditioning system 20 from the normal mode to the increased airflow mode (S206). Here, if the time measured by the thermo-off timer 74 is less than the thermo-off time threshold (S205: NO), the process returns to S202 and determines whether the thermo-off state continues (S202).

[0069] In this way, when the air conditioning system 20 switches from the normal mode to the increased airflow mode, an airflow increase process is performed to increase the airflow of the transport fan to a level higher than the airflow in the normal mode (S300). The airflow increase process will be described in detail below with reference to Fig. 9. Fig. 9 is a flowchart showing the airflow increase process in the increased airflow mode.

[0070] First, the system controller 10 acquires the current airflow rate from the transport fan 3 (S301). The acquired airflow rate is the airflow rate before the airflow rate increasing process is performed. and the airflow rate of the transport fan 3 in the normal mode.

[0071] Next, the acquired airflow volume of the transport fan 3 in the normal mode is stored in the memory unit 46 (S302). By storing the airflow volume of the transport fan 3 in the normal mode, when the increased airflow mode ends and the mode switches to the normal mode, the original airflow volume can be immediately restored by referring to the memory unit 46.

[0072] Next, the system controller 10 sets the airflow rate of the transport fan 3 in the increased airflow rate mode using the airflow rate determination unit 40 (S303). The airflow rate determination unit 40 determines the airflow rate of the transport fan 3 to be greater than the airflow rate set in the normal mode. Here, consider a case where the airflow rate of the transport fan 3 can be set in 10 stages, from airflow rate 1 to airflow rate 10, in ascending order. For example, if the airflow rate set in the normal mode is "airflow rate 3," the airflow rate in the increased airflow rate mode can be set to airflow rate 4 or higher, thereby making the airflow rate of the transport fan 3 greater than the airflow rate set in the normal mode.

[0073] Next, the system controller 10 sets the duration of the increased airflow mode (S304). The duration is set by the duration setting unit 78. For example, the duration is set by a user or an installer of the air conditioning system 20 via an input terminal 19 such as a smartphone or tablet. Note that the means for setting the duration is not limited to this. For example, the memory unit 46 may store the size of the rooms 2 (2a to 2e), and the duration of the increased airflow mode may be calculated based on the airflow rate during the increased airflow mode and the size of each room 2 stored in the memory unit 46. Here, for example, the floor area of ​​each room 2 is stored in the memory unit 46 as the size of each room 2. The duration setting unit 78 sets the duration of the increased airflow mode longer as the floor area of ​​each room 2 increases. Furthermore, the duration of the increased airflow mode is set shorter as the airflow rate of the transport fan 3 during the increased airflow mode increases.

[0074] Next, the system controller 10 determines whether the duration set by the duration setting unit 78 has elapsed (S305). In other words, it determines whether a time equal to or greater than a predetermined threshold has elapsed since the mode was switched to the increased airflow rate mode. If the duration set by the duration setting unit 78 has elapsed (S305: YES), the mode switching unit 77 switches the operation mode of the air conditioning system 20 from the increased airflow rate mode to the normal mode (S306). When switching from the increased airflow rate mode to the normal mode, for example, the airflow rate before switching to the increased airflow rate mode stored in the memory unit 46 is set. If the duration set by the duration setting unit 78 has not elapsed (S305: NO), the system controller 10 continues to monitor whether the duration set by the duration setting unit 78 has elapsed.

[0075] Here, the duration set by the duration setting unit 78 may be displayed on the liquid crystal panel of the system controller 10 or on the display unit 80, which is the screen of the user's input terminal 19. In other words, the remaining time until switching from the increased airflow mode to the normal mode may be displayed on the display unit 80. With this configuration, the user can easily determine whether the increased airflow mode is continuing.

[0076] With this configuration, even if the air conditioner 9 is turned off when a comfortable temperature is reached in each room 2, the operating mode switches to increased airflow mode, and air from the air-conditioned room 18 continues to be sent to each room 2 from the air-conditioned room 18. In other words, the airflow rate of the transport fan 3 is maintained at a relatively high level. By continuously supplying air from the air-conditioned room 18 to each room 2, the air that was originally present in each room 2 also continuously circulates into the air-conditioned room 18. The air-conditioned room 18 is equipped with a filter 13 for purifying the circulated air, which purifies the air circulated from each room 2 and supplies it back to each room 2.

[0077] In conventional air conditioning systems, the operation of the air conditioner and fan is temporarily stopped when each room reaches a comfortable temperature in order to save energy. However, if this state continues for a long period of time, the amount of air circulating between the air-conditioned room and the living room decreases, making it difficult for the air in the living room to be purified by the filter in the air-conditioned room. In other words, conventional air conditioning systems have room for improvement in terms of continuously purifying the air in the living room.

[0078] In the air conditioning system 20 of the present disclosure, even when each living room 2 reaches a comfortable temperature, the operation mode switches to the increased airflow mode, and air from the air-conditioned room 18 continues to be sent from the air-conditioned room 18 to each living room 2, making it easy to maintain the amount of air circulating between the air-conditioned room 18 and each living room 2. This configuration makes it possible to continuously purify the air in each living room 2 by the filter 13 of the air-conditioned room 18, thereby maintaining the comfort of the user in each living room 2.

[0079] Up to this point, we have described with reference to Figure 6 the case where mode switching determination is made based on the thermo-off state of the air conditioner 9, but this is not limited to this method. Mode switching determination may be made by any means as long as it is possible to identify the conditions under which the airflow rate of the transport fan 3 decreases. Below, we will explain with reference to Figures 7 and 8 the case where mode switching determination is made based on conditions other than the thermo-off state. Figure 7 is a flowchart for when mode switching determination is made based on the airflow rate of the transport fan 3. Figure 8 is a flowchart for when mode switching determination is made based on the presence / absence status of the room 2.

[0080] First, a case where the mode switching determination is made based on the airflow rate of the transport fan 3 will be described with reference to FIG.

[0081] First, the system controller 10 acquires the airflow rate of the transport fan 3 (3a, 3b) using the airflow rate acquisition unit 72 (S207).

[0082] Next, the system controller 10 determines whether the transport fans 3 (3a, 3b) are in a low air volume state (S208). In other words, it determines whether the transport fans 3 (3a, 3b) are equal to or less than a predetermined air volume threshold. For example, consider a case where the air volume of the transport fan 3 can be set in 10 stages, from air volume 1 to 10, in ascending order of air volume. Here, it is assumed that air volumes 1 to 3 are equal to or less than the predetermined air volume threshold, and air volumes 4 to 10 are equal to or more than the air volume threshold.

[0083] If the transport fan 3 (3a, 3b) is in a low air volume state (S208: YES), the low air volume timer 75 is counted up (S209). In other words, the low air volume timer 75 measures the time that the low air volume state continues. If there are multiple transport fans 3, it is determined that the low air volume state exists when the airflow rates of all the transport fans 3 are equal to or less than the air volume threshold. If the transport fan 3 (3a, 3b) is not in a low air volume state (S208: NO), the low air volume timer 75 is reset and the process ends (S210, END).

[0084] Next, the system controller 10 determines whether the time measured by the low airflow timer 75 is equal to or greater than a predetermined low airflow time threshold (S211). If the time measured by the low airflow timer 75 is equal to or greater than the low airflow time threshold (S211: YES), the mode switching unit 77 switches the operation mode of the air conditioning system 20 from the normal mode to the increased airflow mode (S212). Here, if the time measured by the low airflow timer 75 is less than the low airflow time threshold (S211: NO), the process returns to S208 to determine whether the low airflow state continues (S208).

[0085] In this way, when the air conditioning system 20 switches from the normal mode to the increased airflow mode, an airflow increase process is performed to increase the airflow rate of the transport fan to a level higher than that in the normal mode (S300).

[0086] Next, a case where mode switching determination is made based on the presence / absence status of the room 2 will be described with reference to Fig. 8. Here, a case where the CO2 concentration in each room 2 is detected as a parameter for determining the presence / absence status of the room 2 will be considered.

[0087] First, the system controller 10 acquires the CO2 concentration of the CO2 concentration sensor 12 installed in each room 2 by the CO2 concentration acquisition unit 73 (S213).

[0088] Next, the system controller 10 determines whether or not each of the living rooms 2 is unoccupied using the presence / absence determination unit 76 (S214). In other words, it determines whether or not the CO2 concentration in each of the living rooms 2 (2a to 2e) is equal to or lower than a predetermined CO2 concentration threshold. Here, if the CO2 concentrations in all of the living rooms 2 are equal to or lower than the predetermined CO2 concentration threshold, it is determined that none of the living rooms 2 (2a to 2e) is unoccupied. If none of the living rooms 2 (2a to 2e) is unoccupied (S214: YES), the mode switching unit 77 switches the operating mode of the air conditioning system 20 from normal mode to increased airflow mode (S215). If any of the living rooms 2 (2a to 2e) is occupied (S214: NO), the normal mode is maintained (END).

[0089] In this way, when the air conditioning system 20 switches from the normal mode to the increased airflow mode, an airflow increase process is performed to increase the airflow rate of the transport fan to a level higher than that in the normal mode (S300).

[0090] 8, the presence / absence status of each living room 2 is determined indirectly by detecting the CO2 concentration in each living room 2, but this is not the only possible method. For example, the user may input information that the user is leaving the room to the system controller 10 via an input terminal 19 such as a smartphone or tablet. In other words, a configuration in which the system controller 10 directly determines the presence / absence status of each living room 2 based on whether or not it has acquired information that "the user is leaving the room" is also included in the configuration for determining whether or not there is someone in any of the multiple living rooms.

[0091] The air conditioning system according to the present invention has been described above, but the above embodiment is merely an example and the present invention is not limited to this.

[0092] An outline of one aspect of the present disclosure is as follows. (Item 1) An air conditioning system (20) having a normal mode in which conditioned air is delivered to a plurality of rooms (2) at a predetermined air volume, an air conditioner (9) that is provided in an air conditioning room (18) independent of the plurality of rooms (2) and conditions air in the air conditioning room (18); a transport fan (3) that transports the conditioned air conditioned by the air conditioner (9) to the plurality of rooms (2); a thermo-off timer (74) that measures the time that has elapsed since the air conditioner (9) was thermo-off; When the time measured by the thermo-off timer (74) becomes equal to or greater than a predetermined thermo-off time threshold, the air conditioning system (20) switches to an increased airflow mode in which the airflow rate of the transport fan (3) is increased to be greater than the airflow rate in the normal mode. (Item 2) An air conditioning system (20) having a normal mode in which conditioned air is delivered to a plurality of rooms (2) at a predetermined air volume, an air conditioner (9) that is provided in an air conditioning room (18) independent of the plurality of rooms (2) and conditions air in the air conditioning room (18); A conveying fan ( ) conveys the conditioned air from the air conditioner (9) to the plurality of rooms (2). 3) and a low air volume timer (75) that measures the time that has elapsed since the air volume of the transport fan (3) became equal to or less than a predetermined air volume threshold, When the time measured by the low air volume timer (75) becomes equal to or greater than a predetermined low air volume time threshold, the air conditioning system (20) switches to an increased air volume mode in which the air volume of the transport fan (3) is increased to be greater than the air volume in the normal mode. (Item 3) An air conditioning system (20) having a normal mode in which conditioned air is delivered to a plurality of rooms (2) at a predetermined air volume, an air conditioner (9) that is provided in an air conditioning room (18) independent of the plurality of rooms (2) and conditions air in the air conditioning room (18); a transport fan (3) that transports the conditioned air conditioned by the air conditioner (9) to the plurality of rooms (2); a presence / absence determination unit (76) that determines whether or not there is a person in any of the plurality of living rooms (2), When the presence / absence determining unit (76) determines that there is no one in the plurality of rooms, the air conditioning system (20) switches to an increased airflow mode in which the airflow of the transport fan (3) is increased to be greater than the airflow in the normal mode. (Item 4) Further provided is a CO2 concentration sensor (12) for detecting the CO2 concentration in the plurality of rooms (2), The presence / absence determination unit (76) 4. The air conditioning system (20) according to claim 3, wherein when the CO2 concentration detected by the CO2 concentration sensor (12) is equal to or lower than a predetermined CO2 concentration threshold, it is determined that no one is present in the plurality of rooms (2). (Item 5) a duration setting unit (78) for setting a duration for which the air volume increase mode is to continue; 4. The air conditioning system according to claim 1, wherein the mode is switched to the normal mode when the time set by the duration setting unit has elapsed. (Item 6) an airflow rate acquisition unit (72) that acquires the airflow rate of the transport fan (3); a memory unit (46) that stores the sizes of the plurality of rooms; The duration setting unit (78) 6. The air conditioning system according to claim 5, wherein the duration of the increased air volume mode is calculated based on the air volume of the transport fan (3) and the area of ​​the plurality of rooms (2). (Item 7) 6. The air conditioning system according to claim 5, further comprising a display unit (80) that displays the remaining time until the air volume increase mode is switched to the normal mode. [Industrial Applicability]

[0093] The air conditioning system according to the present invention can be applied as an air conditioning system for air conditioning a plurality of rooms. [Explanation of symbols]

[0094] 1 General housing 2, 2a, 2b, 2c, 2d, 2e Rooms 3, 3a, 3b Conveying fans 4. Fresh air intake fan 5, 5a, 5b, 5c, 5d, 5e outlet 6, 6a, 6b, 6c, 6d, 6e circulation port 7, 7a, 7b, 7c, 7d, 7e Air volume adjustment damper 9 Air conditioner 10 System Controller 11, 11a, 11b, 11c, 11d, 11e Room temperature sensors 12, 12a, 12b, 12c, 12d, 12e CO2 concentration sensor 13 Filters 14 Air conditioning room temperature sensor 18 Air conditioned room 19 Input terminal 20. Air Conditioning System 31 Fan air volume control unit 40 Airflow volume determination unit 46 Memory section 50 Outside air vent 53 Temperature judgment section 54 Room target temperature acquisition section 55 Air conditioning room temperature control unit 56 Temperature difference comparison section 57 Height / Low Judgment Section 61 First Control Section 62 Second Control Section 71 Thermo-off status acquisition unit 72 Air flow rate acquisition section 73 CO2 concentration acquisition section 74 Thermo-off timer 75 Low airflow timer 76 Presence / Absence Determination Department 77 Mode switching section 78 Duration setting section 80 Display section

Claims

1. An air conditioning system having a normal mode in which conditioned air is delivered to a plurality of rooms at a predetermined air volume, an air conditioner that is provided in an air-conditioning room independent of the plurality of rooms and that conditions air in the air-conditioning room; a transport fan that transports the conditioned air that has been air-conditioned by the air conditioner to the plurality of rooms; and a thermo-off timer that measures the time that has elapsed since the air conditioner was thermo-off, and when the time measured by the thermo-off timer reaches or exceeds a predetermined thermo-off time threshold, the air conditioning system switches to an increased airflow mode in which the airflow of the transport fan is increased above the airflow in the normal mode.

2. An air conditioning system having a normal mode in which conditioned air is delivered to a plurality of rooms at a predetermined air volume, an air conditioner that is provided in an air-conditioning room independent of the plurality of rooms and that conditions air in the air-conditioning room; a transport fan that transports the conditioned air that has been air-conditioned by the air conditioner to the plurality of rooms; a low air volume timer that measures the time that has elapsed since the air volume of the conveying fan became equal to or less than a predetermined air volume threshold, When the time measured by the low air volume timer reaches or exceeds a predetermined low air volume time threshold, the air conditioning system switches to an increased air volume mode in which the air volume of the transport fan is increased above the air volume in the normal mode.

3. An air conditioning system having a normal mode in which conditioned air is delivered to a plurality of rooms at a predetermined air volume, an air conditioner that is provided in an air-conditioning room independent of the plurality of rooms and that conditions air in the air-conditioning room; a transport fan that transports the conditioned air that has been air-conditioned by the air conditioner to the plurality of rooms; a presence / absence determination unit that determines whether or not a person is present in any of the plurality of rooms, When the presence / absence determining unit determines that no one is present in the plurality of rooms, the air conditioning system switches to an increased air volume mode in which the air volume of the transport fan is increased to be greater than the air volume in the normal mode.

4. Further provided is a CO2 concentration sensor for detecting the CO2 concentration in the plurality of rooms, The presence / absence determination unit is The air conditioning system according to claim 3 , wherein when the CO 2 concentration detected by the CO 2 concentration sensor is equal to or lower than a predetermined CO 2 concentration threshold, it is determined that no one is present in the plurality of rooms.

5. a duration setting unit that sets a duration for which the air volume increase mode is to be continued; The air conditioning system according to claim 1 , wherein the mode is switched to the normal mode when the time set by the duration setting unit has elapsed.

6. an airflow rate acquisition unit that acquires the airflow rate of the transport fan; A storage unit that stores the sizes of the plurality of rooms, The duration setting unit The air conditioning system according to claim 5 , wherein a duration of the increased air volume mode is calculated based on the air volume of the transport fan and the sizes of the rooms.

7. The air conditioning system according to claim 5 , further comprising a display unit that displays the remaining time until the increased air volume mode is switched to the normal mode.

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