Building air conditioning systems and air conditioning methods

Abstract

To provide an air conditioning system for a building capable of improving temperature controllability and comfort in a room.SOLUTION: The present invention relates to an air conditioning system 1 for a building. The air conditioning system 1 includes an air conditioner 11, a duct 12, a fan 13, a room temperature sensor 14 and a control device 15. The control device 15 includes: a target temperature input section; a room temperature acquisition section; a normal operation section that operates the fan 13; a first determination section that determines whether or not a difference between a room temperature and a target temperature is a predetermined threshold value or larger; a second determination section that determines whether or not the fan 13 is being operated at maximum air quantity notch when the determination made by the first determination section is affirmative; a third determination section that determines whether or not rotational frequency of the fan 13 is smaller than the maximum rotational frequency when the determination made by the second determination section is affirmative; a fourth determination section that determines whether or not a stronger air conditioning action is required on the basis of a change of the difference between the room temperature and the target temperature when the determination made by the third determination section is affirmative; and a rapid operation section that further increases the rotational frequency of the fan 13 within a range up to the maximum rotational frequency when the determination made by the fourth determination section is affirmative.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air conditioning system and an air conditioning method for buildings. [Background technology]

[0002] Patent Document 1 below describes a whole-house air conditioning system for a residence. This air conditioning system includes an air conditioner, a plurality of ducts for transporting the air conditioned by the air conditioner to a plurality of living rooms, and at least one fan for pressurizing and sending the air conditioned by the air conditioner to the plurality of living rooms via the plurality of ducts. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-085533 [Overview of the project] [Problems that the invention aims to solve]

[0004] Generally, the fans mentioned above are selected with power and size that are assumed to be able to control the temperature of a living space. However, due to the influence of constantly changing solar radiation, outside air, and heat generated by daily life, if used in environments exceeding those assumed, the temperature control of the living space temporarily becomes impossible, leading to a decrease in the comfort of the living space.

[0005] This invention was devised in view of the above-described circumstances, and its main objective is to provide a building air conditioning system that can improve the temperature control and comfort of living spaces. [Means for solving the problem]

[0006] The present invention relates to an air conditioning system for air conditioning at least one living room located within a building, comprising: an air conditioner; at least one duct for transporting conditioned air generated by the air conditioner to the living room; at least one fan for pressurizing the conditioned air into the living room via the duct; a living room temperature sensor for measuring the living room temperature, which is the temperature of the living room; and a control device for receiving signals from the living room temperature sensor and controlling the operation of the fan, wherein the fan has a predetermined maximum rotational speed, and the control device comprises: a target temperature input unit for receiving the target temperature of the living room; a living room temperature acquisition unit for obtaining the living room temperature from the living room temperature sensor; and a plurality of fans with different airflow rates set. The building air conditioning system includes: a normal operation unit that operates the fan based on one of the volume notches; a first determination unit that determines whether the fan is operating at the maximum air volume notch, which has the largest air volume among the plurality of air volume notches; a second determination unit that determines whether the fan's rotation speed is less than the maximum rotation speed if the determination of the first determination unit is positive; a third determination unit that determines whether a stronger air conditioning action is necessary based on the change in the difference between the room temperature and the target temperature if the determination of the first determination unit is positive; and a rapid operation unit that further increases the fan's rotation speed within the range up to the maximum rotation speed if both the determination of the second determination unit and the determination of the third determination unit are positive. [Effects of the Invention]

[0007] By adopting the above configuration, the building air conditioning system of the present invention can improve temperature control and comfort in living spaces. [Brief explanation of the drawing]

[0008] [Figure 1] This is a conceptual diagram showing an example of a building with an air conditioning system installed. [Figure 2] This graph shows the PQ curve of a fan operating at maximum rotational speed and the resistance curve of the duct. [Figure 3]This is a conceptual diagram showing an example of the configuration of a control device. [Figure 4] This flowchart shows an example of the procedure for handling the building's air conditioning system. [Figure 5] This diagram shows the relationship between the temperature difference between the room temperature and the target temperature, and the score associated with that temperature difference. [Figure 6] This is a flowchart showing the processing procedure for adjusting the fan airflow notch. [Figure 7] This flowchart shows an example of the processing procedure for the first airflow notch adjustment step. [Figure 8] This graph is intended to explain how to determine whether or not strong air conditioning is necessary. [Figure 9] This figure shows the relationship between the average score associated with temperature difference (average score for the first floor and average score for the second floor) and the fan's airflow notch. [Figure 10] This figure shows the correspondence between the score associated with the temperature difference and the damper opening degree. [Figure 11] This figure shows the relationship between the average score associated with temperature difference (overall average) and the controlled temperature. [Figure 12] This figure shows the relationship between the average score associated with temperature difference (overall average) and the airflow of the indoor unit fan. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. It should be understood that the drawings contain exaggerations and representations that differ from the actual dimensional ratios of the structures in order to aid in understanding the content of the invention. Furthermore, the same or common elements are denoted by the same reference numerals throughout each embodiment, and redundant explanations are omitted. Moreover, the specific configurations shown in the embodiments and drawings are for the purpose of understanding the content of the present invention, and the present invention is not limited to the specific configurations shown in the drawings.

[0010] [building] FIG. 1 is a conceptual diagram showing an example of a building 2 in which an air conditioning system (hereinafter sometimes referred to as the "air conditioning system") 1 of a building is installed. The building 2 is exemplified as a house, but it may be a building or the like. The building 2 of the present embodiment is configured to include a sub-floor space 3 and a floor space 4.

[0011] The sub-floor space 3 of the present embodiment is a space surrounded by a foundation, the ground, and the first floor 5. An opening 6 for taking in outside air Ao is provided in the foundation. The outside air Ao taken in through the opening 6 is heat-exchanged with the heat in the ground with little temperature change throughout the year via the ground. As a result, the sub-floor space 3 can store air (hereinafter sometimes referred to as "sub-floor air") Au that is cooler in summer and warmer in winter than the outside air Ao.

[0012] The floor space 4 is a space provided above the sub-floor space 3 (floor 5). A living room 7 is provided in the floor space 4 of the present embodiment. The living room 7 of the present embodiment includes a first living room 7a, a second living room 7b, a third living room 7c, and a fourth living room 7d. Among these first living room 7a to fourth living room 7d, the first living room 7a and the second living room 7b are provided on the first floor of the building 2. On the other hand, the third living room 7c and the fourth living room 7d are provided on the second floor of the building 2. Note that the living room 7 is not limited to such a mode. For example, it may be composed of only one living room 7, or may further include other living rooms (not shown) different from the first living room 7a to fourth living room 7d.

[0013] [Air Conditioning System] The air conditioning system 1 is for air-conditioning at least one living room 7 provided in the building 2. The air conditioning system 1 of the present embodiment is configured as a whole-building air conditioning system for air-conditioning a plurality of living rooms 7 (in this example, all of the first living room 7a to fourth living room 7d). Note that the air conditioning system 1 is not limited to being configured as a whole-building air conditioning system, and for example, it may be a system that air-conditions only a specific living room 7.

[0014] The air conditioning system 1 of this embodiment comprises an air conditioner 11, at least one duct 12, at least one fan 13, a room temperature sensor 14, and a control device 15.

[0015] [Air conditioner]

[0016] The air conditioner 11 in this embodiment is, for example, a typical household split-type air conditioner. Therefore, the air conditioner 11 includes an indoor unit 16 and an outdoor unit (not shown).

[0017] The indoor unit 16 has an intake port 16a and an outlet port 16b. The intake port 16a is for taking in air (in this example, a mixture of circulated air Ai and outside air Ao (underfloor air Au)) into a heat exchanger (not shown) located inside the indoor unit 16. On the other hand, the outlet port 16b is for discharging the air (conditioned air) Ac generated in the heat exchanger (not shown). In this embodiment, the set temperature of the air conditioner 11 can be controlled by the control device 15.

[0018] The indoor unit 16 is equipped with an indoor unit fan 16c. The indoor unit fan 16c is used to draw in air for air conditioning from the intake port 16a and to discharge the conditioned air Ac from the outlet port 16b. In this embodiment, the airflow of the indoor unit fan 16c is controlled in multiple stages, but it may also be controlled by a single airflow (single notch).

[0019] The airflow of the indoor unit fan 16c in this embodiment is set to five levels, including the first, second, third, fourth, and fifth airflow levels. Of these first to fifth airflow levels, the first airflow level is set to the lowest level, and the fifth airflow level is set to the highest level.

[0020] The airflow rates of the indoor unit fan 16c are set appropriately according to the required air conditioning capacity of the air conditioner 11. An example of an airflow rate is 610 m³. 3 / h, second airflow rate 720m 3 / h, 3rd airflow rate 900m3 / h, 4th airflow rate 1080m 3 / h, 5th airflow rate 1550m 3 Set to / h

[0021] The airflow of the indoor unit fan 16c is not limited to a configuration including the first to fifth airflows; for example, some of the first to fifth airflows may be omitted, or other airflows may be included. The switching of the airflow of the indoor unit fan 16c is performed by the control device 15.

[0022] In this embodiment, the indoor unit 16 is housed inside a chamber box 17. The chamber box 17 is provided, for example, in a non-living room (hall) 8, but is not limited to this configuration.

[0023] The chamber box 17 is formed in the shape of a box with space inside. The chamber box 17 of this embodiment is provided with an air supply port (not shown) for supplying air Ai circulating through multiple living rooms 7 to the interior, and an outside air intake port (not shown) for supplying outside air Ao (underfloor air Au) to the interior. In this embodiment, the outside air Ao (underfloor air Au) is taken in from the underfloor space 3, for example, via an outside air supply duct 18 and an outside air supply fan 19. The outside air Ao may also be taken in directly from outside. The airflow of the outside air supply fan 19 is set appropriately, for example, based on the number of ventilations required for the building 2.

[0024] [duct] The duct 12 in this embodiment is for transporting conditioned air Ac generated by the air conditioner 11 to the living rooms 7. When multiple living rooms 7 are air-conditioned, as in this embodiment, multiple ducts 12 are provided, each connected to one of the living rooms 7. The duct 12 in this embodiment includes a first duct 12a and a second duct 12b.

[0025] The first duct 12a in this embodiment is for transporting conditioned air Ac to the living rooms 7 on the first floor (in this example, the first living room 7a and the second living room 7b). One end of the first duct 12a is connected to the air conditioner 11 side (in this example, the outlet 16b side in the chamber box 17). Furthermore, the first duct 12a is branched between the one end and the other end, with the other end connected to the first living room 7a and the second living room 7b, respectively. Through this first duct 12a, the air conditioner 11 (chamber box 17) is connected to the first living room 7a and the second living room 7b, and conditioned air Ac can be transported to the first living room 7a and the second living room 7b, respectively.

[0026] The second duct 12b in this embodiment is for transporting conditioned air Ac to the living rooms 7 on the second floor (in this example, the third living room 7c and the fourth living room 7d). One end of the second duct 12b is connected to the air conditioner 11 side (in this example, the outlet 16b side in the chamber box 17). Furthermore, the second duct 12b is branched between the one end and the other end, with the other end connected to the third living room 7c and the fourth living room 7d, respectively. Through this second duct 12b, the air conditioner 11 (chamber box 17) is connected to the third living room 7c and the fourth living room 7d, and conditioned air Ac can be transported to the third living room 7c and the fourth living room 7d, respectively.

[0027] Dampers 20 may be provided at the other end of the first duct 12a and the other end of the second duct 12b, respectively. The dampers 20 in this embodiment are for adjusting the airflow rate of conditioned air Ac according to the size of their opening (opening area). The dampers 20 in this embodiment include a first damper 20a for adjusting the airflow rate of conditioned air Ac to the first room 7a and a second damper 20b for adjusting the airflow rate of conditioned air Ac to the second room 7b. Furthermore, the dampers 20 include a third damper 20c for adjusting the airflow rate of conditioned air Ac to the third room 7c and a fourth damper 20d for adjusting the airflow rate of conditioned air Ac to the fourth room 7d. These first dampers 20a to the fourth dampers 20d allow the airflow rate of conditioned air Ac to be independently adjusted in each of the multiple rooms 7 (in this example, the first room 7a to the fourth room 7d).

[0028] In this embodiment, the duct 12 is composed of a first duct 12a and a second duct 12b, but the embodiment is not limited to this configuration. For example, if a living room 7 (not shown) located on the third floor or higher is included, an additional duct 12 (not shown) connected to this living room 7 may be added.

[0029] [fan] The fan 13 is for pressurizing and supplying conditioned air Ac to the living room 7 via the duct 12. In this embodiment, the fan 13 is housed in a chamber box 17, but is not particularly limited.

[0030] It is preferable that the fan 13 is selected to have power and size that are expected to be able to control the temperature of the living room 7, and for which the relationship between pressure loss and rotational speed is known. This ensures that the conditioned air Ac is efficiently pumped into the living room 7, improving the temperature controllability and comfort of the living room 7.

[0031] The fan 13 of this embodiment is configured as a constant air volume fan whose rotational speed is controlled so as to achieve a constant air volume. Therefore, the fan 13 can be operated based on any one of a plurality of predetermined air volume notches. Different air volumes are set for these air volume notches.

[0032] The air volume notches of this embodiment are set in five levels, and for example, include a very low notch, a weak notch, a low notch, a medium notch, and a high notch. Among these air volume notches, the very low notch is set to the smallest air volume. On the other hand, the high notch is set to the largest air volume (that is, as the maximum air volume notch).

[0033] For each air volume notch, for example, an air volume capable of controlling the temperature of the living room 7 can be set. As an example of the air volume of each air volume notch, the very low notch is 160 m 3 / h, the weak notch is 320 m 3 / h, the low notch is 480 m 3 / h, the medium notch is 640 m 3 / h, and the high notch (maximum air volume notch) is set to 800 m 3 / h. Note that the air volume notches are not limited to such a mode, and some of the very low notch to the high notch may be omitted, or furthermore, other air volume notches may be included.

[0034] The switching of each air volume notch of the fan 13 is performed by the control device 15. As a result, similar to a conventional constant air volume fan, the rotational speed of the fan 13 is controlled according to the ventilation resistance, and it becomes possible to pump the conditioned air Ac at the air volume set for each air volume notch.

[0035] The fan 13 of this embodiment has a predetermined maximum rotational speed separately from the air volume notch. The maximum rotational speed is set, for example, to be able to pump the conditioned air Ac at an air volume larger than the maximum air volume notch (high notch), and can be set, for example, to 1200 - 2500 revolutions per minute.

[0036] Figure 2 is a graph showing the PQ curve C1 of fan 13 operating at maximum rotational speed, and the resistance curves C2 and C3 of duct 12. In the graph of Figure 2, the vertical axis represents static pressure P (Pa), and the horizontal axis represents airflow Q (m³). 3 This indicates / h).

[0037] In Figure 2, the PQ curve C1 shows that for fan 13 operating at maximum rotational speed, the airflow Q decreases as the static pressure P (pressure loss) increases.

[0038] Resistance curves C2 and C3 show that as the airflow rate Q increases, the static pressure P (pressure loss) also increases. These resistance curves C2 and C3 vary depending on factors such as the construction conditions of the duct 12 (e.g., length and number of bends) and the magnitude of pressure loss due to filter contamination, etc. In Figure 2, the duct 12 shown by the first resistance curve C2 has a greater pressure loss than the duct 12 shown by the second resistance curve C3.

[0039] The first resistance curve C2 is at static pressure P1 at the maximum airflow notch (strong notch) airflow Q1 and intersects with the PQ curve C1 of the fan 13 operating at maximum rotational speed. In this case, for the fan 13 connected to the duct 12 shown by the first resistance curve C2, the rotational speed when operating at the maximum airflow notch has already reached the maximum rotational speed. Therefore, the rotational speed of the fan 13 cannot be increased any further (i.e., there is no remaining rotational speed capacity for the fan 13).

[0040] On the other hand, the second resistance curve C3 shows that at the maximum airflow notch (strong notch) airflow Q1, the static pressure is P2, and it does not intersect with the PQ curve C1 of the fan 13 operating at maximum rotational speed. In this case, for the fan 13 connected to the duct 12 shown by the second resistance curve C3, the rotational speed when operating at the maximum airflow notch is lower than the maximum rotational speed. Therefore, it is possible to further increase the rotational speed of the fan 13 operating at the maximum airflow notch within the range up to the maximum rotational speed (from static pressure P2 to static pressure P3 where it intersects with the PQ curve C1) (i.e., there is reserve capacity in the fan 13's rotational speed).

[0041] Thus, even when the fan 13 is operating at the maximum airflow notch (high notch), if there is still rotational speed capacity remaining, the fan can increase its rotational speed within the range from the maximum airflow notch rotational speed to the maximum rotational speed. This increase in rotational speed can supply more conditioned air Ac than when operating at the maximum airflow notch.

[0042] As shown in Figure 1, this embodiment includes multiple fans 13 that pump conditioned air Ac to multiple living rooms 7 through each of the multiple ducts 12 (in this example, the first duct 12a and the second duct 12b). The fans 13 in this embodiment include the first fan 13a and the second fan 13b.

[0043] The first fan 13a in this embodiment is for pressurizing and supplying conditioned air Ac to the first-floor rooms 7 (in this example, the first room 7a and the second room 7b) via the first duct 12a. The second fan 13b in this embodiment is for pressurizing and supplying conditioned air Ac to the second-floor rooms 7 (in this example, the third room 7c and the fourth room 7d) via the second duct 12b.

[0044] The fan 13 in this embodiment is composed of a first fan 13a and a second fan 13b, but is not limited to this configuration. For example, if other ducts (not shown) are provided in addition to the first duct 12a and the second duct 12b, additional fans (not shown) may be added to pump conditioned air Ac into the living room 7 through those ducts.

[0045] [Room temperature sensor] The room temperature sensor 14 is for measuring the temperature of the room 7 (hereinafter sometimes referred to as "room temperature"). The room temperature sensor 14 is not particularly limited as long as it is capable of detecting the room temperature; for example, a known temperature sensor may be used. In this embodiment, the room temperature sensor 14 is installed in each of the multiple rooms 7 (in this example, the first room 7a to the fourth room 7d). The room temperature (signal) detected by the room temperature sensor 14 is transmitted to the control device 15.

[0046] [Control device] The control device 15 in this embodiment is composed of a computer and is installed, for example, in a partition wall or the like.

[0047] Figure 3 is a conceptual diagram showing an example of the configuration of the control device 15. The control device 15 is composed of, for example, an arithmetic unit 21, a storage device 22 for storing processing procedures, etc., and a working memory 23 for reading processing procedures, etc., from the storage device 22. An input device 24 and an output device 25 are connected to the control device 15 (arithmetic unit 21).

[0048] [Input device] The input device 24 in this embodiment consists of operation buttons, a touch panel, etc., provided on the housing of the control device 15 shown in Figure 1. Through such an input device 24, information (signals) input by, for example, a user (resident), can be transmitted to the control device 15.

[0049] The information input to the input device 24 includes, for example, the start and stop of the air conditioning operation (heating operation or cooling operation) of the air conditioner 11. Furthermore, the input information includes the target temperature for each room 7 (in this example, the first room 7a to the fourth room 7d). The target temperature in this embodiment is the temperature of each room 7 that should be achieved and maintained by the air conditioning system 1 (air conditioning method).

[0050] [Output device] The output device 25 in this embodiment is configured as a display provided in the housing of the control device 15 shown in Figure 1. This output device 25 receives signals (data) from the control device 15 and can display, for example, the operating status of the air conditioning system 1. Examples of the operating status include the operating status of the air conditioner 11 (heating or cooling operation) and the target temperature and room temperature of each of the multiple rooms 7.

[0051] [Arithmetic device] As shown in Figure 3, the arithmetic unit 21 of this embodiment is composed of, for example, a CPU (Central Processing Unit). The arithmetic unit 21 (control device 15) of this embodiment is communicatively connected to the air conditioner 11. As a result, the operation of the air conditioner 11 (for example, changing the set temperature and the airflow of the indoor unit fan 16c shown in Figure 1) can be controlled by the arithmetic unit 21. Furthermore, data regarding the operating status of the air conditioner 11 can be received by the arithmetic unit 21.

[0052] In this embodiment, the computing device 21 (control device 15) is communicatively connected to the fan 13 (first fan 13a and second fan 13b) and the outside air supply fan 19. As a result, the operation of the fan 13 and the outside air supply fan 19 (for example, switching of airflow notches) can be controlled by the computing device 21. Furthermore, signals from the fan 13 (data such as the currently operating airflow notch and rotation speed) can be received by the computing device 21.

[0053] In this embodiment, the computing device 21 is communicatively connected to the room temperature sensor 14. As a result, the signals from the room temperature sensor 14 (in this example, the measurement data of the room temperatures of the first room 7a to the fourth room 7d shown in Figure 1) are received by the computing device 21.

[0054] [Storage device] The storage device 22 in this embodiment is, for example, a non-volatile information storage device. The storage device 22 includes a data unit 27 and a program unit 28.

[0055] [Data Section] The data unit 27 in this embodiment is for storing calculation results and the like from the arithmetic unit 21. The data unit 27 in this embodiment includes a target temperature input unit 27a, a room temperature input unit 27b, a maximum rotation speed input unit 27c, a score input unit 27d, and an average value input unit 27e. However, the data unit 27 is not limited to this configuration. For example, the data unit 27 may further include input units for storing other information.

[0056] The target temperature input unit 27a is for storing the target temperature of the rooms 7 shown in Figure 1 (in this example, rooms 1 7a to 4 7d). This target temperature is input by the user (resident), for example, via the input device 24. The room temperature input unit 27b is for storing the room temperature of rooms 7 (in this example, rooms 1 7a to 4 7d) measured by the room temperature sensor 14.

[0057] The maximum rotation speed input unit 27c is for storing a predetermined maximum rotation speed for the fan 13 (first fan 13a and second fan 13b) shown in Figure 1. This maximum rotation speed is input to the maximum rotation speed input unit 27c before the air conditioning method is implemented. The information (data) stored in the score input unit 27d and the average value input unit 27e will be explained in each step of the building air conditioning method (hereinafter sometimes referred to as the "air conditioning method") described later.

[0058] [Programming Department] The program unit 28 is a program (computer program) that causes the arithmetic unit 21 (control device 15) to execute the air conditioning method of this embodiment. The program unit (program) 27, when executed by the arithmetic unit 21, can cause the control device 15 to function as a specific means.

[0059] The program unit 28 of this embodiment includes a room temperature acquisition unit 28a, a normal operation unit 28b, a rapid operation unit 28c, a first judgment unit 28d, a second judgment unit 28e, a third judgment unit 28f, a fourth judgment unit 28g, and a fifth judgment unit 28h. Furthermore, the program unit 28 of this embodiment includes a target temperature acquisition unit 28i, an air conditioning start unit 28j, an air conditioning end unit 28k, an end judgment unit 28m, an air conditioning operation adjustment unit 28n, a damper opening adjustment unit 28o, a score acquisition unit 28p, an average value acquisition unit 28q, and a maximum rotation speed judgment unit 28r. Note that the program unit 28 is not limited to this configuration and may include other programs. The functions of these program units 28 will be explained in each step of the air conditioning method described later.

[0060] [Building air conditioning methods] Next, the air conditioning method of this embodiment will be described. Figure 4 is a flowchart showing an example of the processing procedure for the air conditioning method of a building.

[0061] [Start air conditioning operation] In the air conditioning method of this embodiment, first, air conditioning operation is started (step S1). In step S1 of this embodiment, the operation of the air conditioner 11, fan 13, and outside air supply fan 19 shown in Figure 1 is started. If the air conditioning system 1 is not equipped with an outside air supply fan 19, the start of operation of the outside air supply fan 19 may be omitted.

[0062] In step S1 of this embodiment, the air conditioning start unit 28j, included in the program unit 28 shown in Figure 3, is loaded into the working memory 23. The air conditioning start unit 28j is a program for starting air conditioning operation (in this example, operation of the air conditioner 11, fan 13, and outside air supply fan 19). When this air conditioning start unit 28j is executed by the arithmetic unit 21, the control device 15 can function as a means for starting air conditioning operation.

[0063] In step S1 of this embodiment, first, the air conditioning start unit 28j (control device 15) starts the air conditioning operation (heating operation or cooling operation) of the air conditioner 11 shown in Figure 1. Switching between heating operation and cooling operation may be performed, for example, by input to the input device 24 by the user (resident), or by the air conditioning start unit 28j based on the outside air temperature, etc.

[0064] The set temperature (initial set temperature) of the air conditioner 11 is set appropriately based on, for example, the target temperature set for each of the multiple rooms 7 (in this example, the first room 7a to the fourth room 7d), or the room temperature. The airflow rate of the indoor unit fan 16c is selected appropriately from the first to fifth airflow rates described above, for example, depending on the operating status (air conditioning load) of the air conditioner 11. Note that the setting of the set temperature of the air conditioner 11 and the airflow rate of the indoor unit fan 16c may be carried out according to the same procedure as the process S8 for adjusting the operation of the air conditioner 11, which will be described later.

[0065] Next, in step S1 of this embodiment, the air conditioning start unit 28j (control device 15) shown in Figure 3 starts operating the fan 13 and the outside air supply fan 19 shown in Figure 1. The airflow notch of the fan 13 is appropriately selected from the low notch to high notch (maximum airflow notch) as described above, depending on, for example, the number of ventilations required for the building 2 and the operating status (air conditioning load) of the air conditioner 11. If a strong air conditioning effect is required for the living room 7, it is preferable to operate it at the high notch (maximum airflow notch). In this case, the selection of the airflow notch may be carried out, for example, based on the same procedure as the normal operation step S38 described later. The airflow of the outside air supply fan 19 is appropriately set, for example, based on the number of ventilations required for the building 2.

[0066] As shown in Figure 1, in step S1 of this embodiment, a mixture of underfloor air Au (outside air Ao) supplied by the operation of the outside air supply fan 19 and air Ai circulating through multiple living rooms 7 is drawn into the indoor unit 16. Then, the conditioned air Ac, which has undergone heat exchange in the indoor unit 16, is discharged into the chamber box 17.

[0067] The conditioned air Ac is supplied to each of the multiple living rooms 7 (in this example, the first living room 7a to the fourth living room 7d) via the ducts 12 (first duct 12a and second duct 12b) by the operation of the fans 13 (first fan 13a and second fan 13b). As a result, in process S1, the multiple living rooms 7 can be ventilated and air-conditioned while circulating the air Ai within the building 2.

[0068] [Enter the target temperature for the room] Next, in the air conditioning method of this embodiment, the target temperature of the living room 7 shown in Figure 1 is input (step S2). Step S2 of this embodiment first loads the target temperature acquisition unit 28i, which is included in the program unit 28 shown in Figure 3, into the working memory 23. The target temperature acquisition unit 28i is a program for inputting the target temperatures of the living rooms 7 shown in Figure 1 (in this example, the first living room 7a to the fourth living room 7d). When this target temperature acquisition unit 28i is executed by the arithmetic unit 21, the control device 15 can function as a means for inputting the target temperature.

[0069] As described above, in this embodiment, the target temperature of the living room 7 shown in Figure 1 (in this example, the first living room 7a to the fourth living room 7d) is input by the user (resident) or the like via the input device 24. These target temperatures (signals) are transmitted from the input device 24 to the target temperature acquisition unit 28i (control device 15) shown in Figure 3 and stored (input) in the target temperature input unit 27a.

[0070] After step S2 is performed, it is preferable that the updated target temperature is input to the target temperature input unit 27a each time the target temperature is updated. This enables air conditioning of building 2 based on the target temperature updated in real time.

[0071] [Get room temperature] Next, in the air conditioning method of this embodiment, the room temperature is obtained from the room temperature sensor 14 shown in Figure 1 (step S3).

[0072] In step S3 of this embodiment, the room temperature acquisition unit 28a, included in the program unit 28 shown in Figure 3, is loaded into the working memory 23. The room temperature acquisition unit 28a is a program for acquiring the room temperatures of the rooms 7 shown in Figure 1 (in this example, the first room 7a to the fourth room 7d). When this room temperature acquisition unit 28a is executed by the arithmetic unit 21, the control device 15 can be made to function as a means for acquiring room temperatures.

[0073] As described above, in this embodiment, the room temperature of the living rooms 7 (in this example, the first living room 7a to the fourth living room 7d) is measured by the room temperature sensor 14. These room temperatures are transmitted from the room temperature sensor 14 to the room temperature acquisition unit 28a (control device 15) shown in Figure 3, and input (stored) to the room temperature input unit 27b.

[0074] After step S3 is completed, it is preferable that the room temperature measured by the room temperature sensor 14 is input to the room temperature input unit 27b at predetermined time intervals (for example, every 1 to 30 minutes). This enables air conditioning based on the room temperature that changes moment by moment, improving the temperature controllability and comfort of the room 7. Furthermore, it becomes possible to acquire the room temperature over time.

[0075] [Get the score associated with the temperature difference] Next, in the air conditioning method of this embodiment, a score associated with the temperature difference between the room temperature and the target temperature is acquired (step S4). As in this embodiment, when multiple rooms 7 shown in Figure 1 (in this example, the first room 7a to the fourth room 7d) are air-conditioned, a score associated with the temperature difference between the room temperature and the target temperature (hereinafter sometimes referred to as "score") is acquired for each of these rooms 7. These scores are used to understand the degree to which the room temperature has reached the target temperature for each room 7.

[0076] In step S4 of this embodiment, the target temperature of the living room 7 input to the target temperature input unit 27a shown in Figure 3, and the living room temperature input to the living room temperature input unit 27b are loaded into the working memory 23. Furthermore, in step S4, the score acquisition unit 28p included in the program unit 28 is loaded into the working memory 23. The score acquisition unit 28p is a program for acquiring points associated with the temperature difference between the living room temperature and the target temperature for the living rooms 7 shown in Figure 1 (in this example, the first living room 7a to the fourth living room 7d). By executing this score acquisition unit 28p by the arithmetic unit 21, the control device 15 can be made to function as a means for acquiring points.

[0077] In this embodiment, the temperature difference between the room temperature and the target temperature is determined by the negative difference between the room temperature and the target temperature (hereinafter sometimes referred to as the "negative difference") ΔT. This negative difference ΔT is the value obtained by subtracting the other of the target temperature and room temperature from one of the target temperature and room temperature, so that the difference becomes positive when the room temperature has not reached the target temperature (i.e., when it is negative).

[0078] In the heating operation of the air conditioner 11 shown in Figure 1, "the room temperature has not reached the target temperature (negative)" refers to the case where the room temperature is lower than the target temperature. Therefore, the temperature difference ΔT during heating operation is calculated as the value obtained by subtracting the room temperature from the target temperature (i.e., the value that is positive in the negative case).

[0079] If the temperature difference ΔT during heating operation is a positive value, the room temperature has not reached the target temperature (i.e., the room temperature is lower than the target temperature). In this case, the larger the value of the temperature difference ΔT, the stronger the air conditioning (heating) effect may be judged to be needed in room 7. On the other hand, if the temperature difference ΔT during heating operation is zero or less, the room temperature has reached the target temperature (i.e., the room temperature is above the target temperature). In this case, the strong air conditioning (heating) effect may be judged not to be needed in room 7.

[0080] During cooling operation of the air conditioner 11, "the room temperature has not reached the target temperature (negative)" refers to a situation where the room temperature is higher than the target temperature. Therefore, the temperature difference ΔT during cooling operation is calculated as the room temperature minus the target temperature (i.e., a value that is positive in the negative case).

[0081] If the temperature difference ΔT during cooling operation is a positive value, the room temperature has not reached the target temperature (i.e., the room temperature is higher than the target temperature). In this case, the larger the value of the temperature difference ΔT, the stronger the air conditioning (cooling) effect may be judged to be needed in room 7. On the other hand, if the negative difference ΔT during cooling operation is zero or less, the room temperature has reached the target temperature (i.e., the room temperature is below the target temperature). In this case, the strong air conditioning (cooling) effect may be judged not to be needed in room 7.

[0082] In step S4 of this embodiment, the temperature difference (negative difference) ΔT between the room temperature and the target temperature is determined for each of the multiple rooms shown in Figure 1 (in this example, the first room 7a to the fourth room 7d).

[0083] Next, in step S4 of this embodiment, a score associated with the temperature difference ΔT is determined. The score is not particularly limited as long as it is associated with the temperature difference ΔT. In this embodiment, different scores S are set for each predetermined numerical range (threshold) of the temperature difference ΔT. The numerical range of the temperature difference ΔT can be set appropriately, for example, according to the air conditioning accuracy required for the air conditioning system 1.

[0084] Figure 5 shows the relationship between the temperature difference ΔT between the room temperature and the target temperature, and the score S associated with that temperature difference ΔT. In this embodiment, the score S increases in proportion to the magnitude of the temperature difference ΔT. Therefore, the score S is associated with the temperature difference ΔT.

[0085] In rooms 7 with a large score S, the temperature difference (negative difference) ΔT between the room temperature and the target temperature is large, resulting in a low degree of achieving the target room temperature. In such rooms 7, strong air conditioning is required, so it is preferable to increase the air conditioning load. On the other hand, in rooms 7 with a small score S, the temperature difference (negative difference) ΔT between the room temperature and the target temperature is small, resulting in a high degree of achieving the target room temperature. In such rooms 7, strong air conditioning is unnecessary, so it is preferable to decrease the air conditioning load. Thus, the score S is set as a load point indicating the magnitude of the air conditioning load.

[0086] In step S4 of this embodiment, for each of the multiple rooms shown in Figure 1 (in this example, the first room 7a to the fourth room 7d), a score S corresponding to the temperature difference ΔT is determined based on the correspondence shown in Figure 5. The scores S for the multiple rooms 7 are input (stored) into the score input unit 27d shown in Figure 3.

[0087] [Calculate the average score] Next, in the air conditioning method of this embodiment, the average value of the score S of each of the multiple rooms 7 (in this example, the first room 7a to the fourth room 7d) is obtained (step S5). In this embodiment, the average values ​​of the score S obtained are the floor-by-floor average values ​​(1st floor average and 2nd floor average), which are the average values ​​of the score S of each room 7 located on each floor of the building 2, and the overall average value, which is the average value of the score S of all rooms 7 located in the building 2.

[0088] In step S5 of this embodiment, the score S associated with the temperature difference ΔT of the living room 7, which is input to the score input unit 27d shown in Figure 3, and the average value acquisition unit 28q included in the program unit 28 are loaded into the working memory 23. The average value acquisition unit 28q is a program for acquiring the average value of the scores S of each of the living rooms 7 shown in Figure 1 (in this example, the first living room 7a to the fourth living room 7d). When this average value acquisition unit 28q is executed by the arithmetic unit 21, the control device 15 can be made to function as a means for acquiring the average value.

[0089] In step S5 of this embodiment, first, the average value of the scores S for each of the first-floor rooms 7 (in this example, the first room 7a and the second room 7b) shown in Figure 1 is calculated. This obtains the first-floor average value. Such a first-floor average value can be obtained as a score S associated with an intermediate (averaged) temperature difference ΔT between the first room 7a and the second room, even if the temperature difference (the degree to which the room temperature reaches the target temperature) ΔT is different in each room.

[0090] A higher average value on the first floor indicates that the overall temperature of the rooms on the first floor (in this example, rooms 1 and 2) is not reaching the target temperature, and that strong air conditioning is needed. On the other hand, a lower average value on the first floor indicates that the overall temperature of the rooms on the first floor is not reaching the target temperature, and that strong air conditioning is not needed.

[0091] Next, in step S5 of this embodiment, the average value of the scores S for each of the rooms 7 on the second floor (in this example, the third room 7c and the fourth room 7d) is calculated. This obtains the second-floor average value. Such a second-floor average value can be obtained as a score S associated with an intermediate (averaged) temperature difference ΔT between the third room 7c and the fourth room 7d, even if the temperature difference (the degree to which the room temperature reaches the target temperature) ΔT is different for each room.

[0092] A higher average value on the second floor indicates that the room temperature in the second-floor rooms 7 (in this example, the third room 7c and the fourth room 7d) is not reaching the target temperature as a whole, and that strong air conditioning is needed. On the other hand, a lower average value on the second floor indicates that the room temperature in the second-floor rooms 7 is not reaching the target temperature as a whole, and that strong air conditioning is not needed.

[0093] Next, in step S5 of this embodiment, the average value of the scores S for each of the multiple living rooms 7 (in this example, the first living room 7a to the fourth living room 7d) provided in the building 2 is calculated. This gives rise to an overall average value. Such an overall average value can be obtained as a score S associated with the intermediate (averaged) temperature difference ΔT in each living room 7 (the first living room 7a to the fourth living room 7d), even if the temperature difference (the degree to which the room temperature reaches the target temperature) ΔT is different in each living room 7.

[0094] A higher overall average value indicates that the overall temperature of the rooms 7 (in this example, rooms 1-7a to 4-7d) in building 2 is lower than the target temperature, and that strong air conditioning is required. On the other hand, a lower overall average value indicates that the overall temperature of the rooms 7 in building 2 is higher than the target temperature, and that strong air conditioning is not required.

[0095] The average value of score S is not limited to the average value of the first floor, the average value of the second floor, and the overall average value. For example, if the building 2 includes living rooms 7 (not shown) located on the third floor or higher, the average value of the third floor may be obtained. The average values ​​of score S (in this example, the average value of the first floor, the average value of the second floor, and the overall average value) are input (stored) in the average value input unit 27e shown in Figure 3.

[0096] [Adjusting the fan airflow notch (Fan airflow notch adjustment process)] Next, in the air conditioning method of this embodiment, the airflow notch of the fan 13 shown in Figure 1 is adjusted (fan airflow notch adjustment step S6). If multiple fans 13 are provided, as in this embodiment (in this example, the first fan 13a and the second fan 13b), the airflow notch is adjusted for each of those fans 13.

[0097] As described above, the fans 13 (first fan 13a and second fan 13b) were selected to have power and size that were assumed to be able to control the temperature of the living room 7. However, due to the influence of constantly changing solar radiation, outside air, and heat generated by daily life, when the air conditioning system 1 was used under conditions exceeding those assumed, the temperature control of the living room 7 temporarily became impossible, resulting in a decrease in the comfort level of the living room 7.

[0098] In the fan airflow notch adjustment step S6 of this embodiment, as shown in the second resistance curve C3 in Figure 2, if there is still remaining rotational speed capacity for the fan 13 operating at the maximum airflow notch (airflow Q1 at the strong notch), the rotational speed of the fan 13 is increased within the range up to the maximum rotational speed. As a result, more conditioned air Ac is supplied to the living room 7, which requires a strong air conditioning effect, than when operating at the maximum airflow notch. Therefore, even when the air conditioning system 1 is used under the above conditions, temperature control of the living room 7 becomes possible, further improving the comfort of the living room 7. Figure 6 is a flowchart showing the processing procedure of the fan airflow notch adjustment step S6.

[0099] [Adjust the airflow notch of the first fan (First airflow notch adjustment process)] In the fan airflow notch adjustment step S6 of this embodiment, first, the airflow notch of the first fan 13a shown in Figure 1 is adjusted (first airflow notch adjustment step S21). Figure 7 is a flowchart showing an example of the processing procedure for the first airflow notch adjustment step S21.

[0100] [Determine if the fan is running at maximum speed] In the first airflow notch adjustment step S21 of this embodiment, it is first determined whether or not the fan (first fan 13a) is operating at its maximum rotational speed (step S31).

[0101] In step S31 of this embodiment, the maximum rotational speed of the fan 13 (first fan 13a) input to the maximum rotational speed input unit 27c shown in Figure 3, and the maximum rotational speed determination unit 28r included in the program unit 28 are loaded into the working memory 23. The maximum rotational speed determination unit 28r is a program for determining whether or not the fan 13 (first fan 13a) is operating at its maximum rotational speed. By executing this maximum rotational speed determination unit 28r by the arithmetic unit 21, the control device 15 can function as a means for determining whether or not the first fan 13a is operating at its maximum rotational speed.

[0102] In step S31 of this embodiment, the maximum rotational speed determination unit 28r (control device 15) acquires the rotational speed of the currently operating first fan 13a based on a signal related to the rotational speed transmitted from the first fan 13a. Based on the acquired rotational speed, it is determined whether or not the first fan 13a is operating at its maximum rotational speed.

[0103] If it is determined that the first fan 13a is operating at its maximum rotational speed (Yes in step S31), it is not necessary to perform the rapid operation step S37 described later to increase the rotational speed of the first fan 13a within the range up to the maximum rotational speed. In this case, the fifth determination step S33 is performed to determine whether or not a strong air conditioning effect (operation of the first fan 13a at maximum rotational speed) is no longer necessary.

[0104] On the other hand, if it is determined that the first fan 13a is not operating at its maximum rotational speed (No in step S31), the first determination step S32 is performed to determine whether or not there is a possibility that stronger air conditioning is needed in the living room 7 (first living room 7a or second living room 7b).

[0105] [Determining whether the difference between the room temperature and the target temperature is above a threshold (First decision step)] Next, in the first airflow notch adjustment step S21 of this embodiment, it is determined whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold (first determination step S32).

[0106] In this embodiment, based on the difference between the room temperature and the target temperature, it is determined whether a strong air conditioning effect is required in the rooms 7 (first room 7a and second room 7b) to which conditioned air Ac is pumped by the fan 13 (first fan 13a). In this embodiment, it is determined whether the average value of the score S associated with the difference between the room temperature and the target temperature (the negative difference) obtained in step S5 is equal to or greater than a predetermined threshold. The threshold is set appropriately based on the air conditioning effect required for the rooms 7, and may be set to, for example, "4.5 points".

[0107] In the first determination step S32 of this embodiment, the first-order average value of the score S stored in the average value input unit 27e shown in Figure 3, and the first determination unit 28d included in the program unit 28 are loaded into the working memory 23. The first determination unit 28d is a program for determining whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold. By executing this first determination unit 28d by the arithmetic unit 21, the control device 15 can be made to function as a means for determining whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold.

[0108] If the difference between the room temperature and the target temperature (the average value of the score S on the first floor) is determined to be above a predetermined threshold (Yes in the first determination step S32), then it is possible that strong air conditioning is required in room 7 (either the first room 7a or the second room 7b). In this case, it is preferable to determine whether the first fan 13a is operating at the maximum airflow notch before increasing the rotation speed of the first fan 13a up to the maximum rotation speed. Therefore, if the determination of the first determination unit 28d is positive (Yes in the first determination step S32), the second determination step S34 is performed to determine whether the fan (first fan 13a) is operating at the maximum airflow notch (airflow Q1 of the strong notch shown in Figure 2), which has the largest airflow among the multiple airflow notches.

[0109] On the other hand, if the difference between the room temperature and the target temperature (the average value of the score S on the first floor) is determined to be less than the threshold ("No" in the first determination step S32), then strong air conditioning is not required in the first room 7a and the second room 7b. In this case, even if there is still capacity available for the rotation speed of the first fan 13a, it is not necessary to increase the rotation speed of the first fan 13a up to the maximum rotation speed. Therefore, the normal operation step S38 is performed, in which the first fan 13a is operated at one of the above-mentioned multiple airflow notches (from low notch to high notch). This suppresses the air conditioning effect from becoming unnecessarily large, and improves the temperature controllability and comfort of the rooms. Furthermore, it suppresses the increase in power consumption of the fan 13, improving energy efficiency.

[0110] [Determine if the fan is operating at the maximum airflow setting (second determination step)] Next, in the first airflow notch adjustment step S21 of this embodiment, it is determined whether the fan (first fan 13a) is operating at the maximum airflow notch (airflow Q1 of the strong notch shown in Figure 2), which is the largest airflow among the multiple airflow notches (second determination step S34). This second determination step S34 is performed when the determination in the first determination step S32 (first determination unit 28d) is positive.

[0111] In the second determination step S34 of this embodiment, the second determination unit 28e, included in the program unit 28 shown in Figure 3, is loaded into the working memory 23. The second determination unit 28e is a program for determining whether or not the fan 13 (first fan 13a) is operating at the maximum airflow notch. By executing this second determination unit 28e by the arithmetic unit 21, the control device 15 can function as a means for determining whether or not the first fan 13a is operating at the maximum airflow notch.

[0112] In the second determination step S34 of this embodiment, the second determination unit 28e (control device 15) acquires the airflow notch of the first fan 13a that is currently in operation based on the signal related to the airflow notch transmitted from the first fan 13a. Then, in the second determination step S34, it is determined whether or not the first fan 13a is operating at the maximum airflow notch (airflow Q1 of the strong notch shown in Figure 2) based on the acquired airflow notch.

[0113] If it is determined that the first fan 13a is operating at the maximum airflow notch (Yes in the second determination step S34), then, as described above, a strong air conditioning effect is required in the living room 7 (first living room 7a or second living room 7b). In this case, the supply of conditioned air Ac at the maximum airflow notch may not be sufficient, and a stronger air conditioning effect may be required. In such cases, if there is still remaining rotational speed capacity of the first fan 13a, it is preferable to increase the rotational speed of the first fan 13a within the range up to the maximum rotational speed to supply more conditioned air Ac. Therefore, if the determination of the second determination unit 28e is positive (Yes in the second determination step S34), the third determination step S35 is performed to determine whether or not there is still remaining rotational speed capacity of the first fan 13a.

[0114] On the other hand, if it is determined that the first fan 13a is not operating at the maximum airflow notch (the result is "No" in the second determination step S34), then strong air conditioning is not required in the first room 7a and the second room 7b. In this case, even if there is still capacity available in the rotational speed of the first fan 13a, it is not necessary to increase the rotational speed of the first fan 13a up to the maximum rotational speed. Therefore, the normal operation step S38 is performed, in which the first fan 13a is operated at one of the above-mentioned multiple airflow notches (from low notch to high notch). This suppresses the air conditioning effect from becoming unnecessarily strong, and improves the temperature control and comfort of the rooms. Furthermore, it suppresses the increase in power consumption of the fan 13, improving energy efficiency.

[0115] [Determine if the fan speed is lower than the maximum speed (third determination step)] Next, in the first airflow notch adjustment step S21 of this embodiment, it is determined whether the rotational speed of the fan 13 (first fan 13a) operating at the maximum airflow notch is less than the maximum rotational speed of the fan 13 (third determination step S35). This third determination step S35 is performed when the determination in the second determination step S34 (second determination unit 28e) is positive.

[0116] In the third determination step S35 of this embodiment, the maximum rotational speed of the fan 13 (first fan 13a) input to the maximum rotational speed input unit 27c shown in Figure 3, and the third determination unit 28f included in the program unit 28 are loaded into the working memory 23. The third determination unit 28f is a program for determining whether the rotational speed of the fan 13 (first fan 13a) operating at the maximum airflow notch is less than the maximum rotational speed predetermined for the fan 13 (first fan 13a). When this third determination unit 28f is executed by the arithmetic unit 21, the control device 15 can function as a means for determining whether the rotational speed of the first fan 13a is less than the maximum rotational speed of the first fan 13a.

[0117] Whether the rotational speed of the first fan 13a operating at the maximum airflow notch is less than the maximum rotational speed of the first fan 13a is determined as appropriate. In the third determination step S35 of this embodiment, first, the rotational speed of the first fan 13a operating at the maximum airflow notch is obtained based on the rotational speed signal transmitted from the first fan 13a. Then, it is determined whether the rotational speed of the first fan 13a operating at the maximum airflow notch is less than the maximum rotational speed of the first fan 13a.

[0118] If the rotational speed of the first fan 13a operating at the maximum airflow notch is determined to be less than the maximum rotational speed of the first fan 13a (Yes in the third determination step S35), then there is still room for improvement in the rotational speed of the first fan 13a despite operating at the maximum airflow notch. However, increasing the rotational speed of the first fan 13a up to the maximum rotational speed will increase power consumption, so it is preferable to determine whether a stronger air conditioning effect is required in the living room 7 (in this example, the first living room 7a or the second living room 7b). Therefore, if the determination of the third determination unit 28f is positive (Yes in the third determination step S35), the fourth determination step S36 is performed to determine whether a stronger air conditioning effect is required in the living room 7 (the first living room 7a or the second living room 7b).

[0119] On the other hand, if it is determined that the rotational speed of the first fan 13a operating at the maximum airflow notch is equal to or greater than the maximum rotational speed of the first fan 13a (the result is "No" in the third determination step S35), then, as shown in the first resistance curve C2 in Figure 2, there is no remaining rotational speed capacity for the first fan 13a. In this case, since the rotational speed of the first fan 13a cannot be increased any further, the normal operation step S38 is performed, in which the first fan 13a is operated at one of the above-mentioned multiple airflow notches (from low notch to high notch).

[0120] [Determine whether or not strong air conditioning is necessary (Fourth Decision Step)] Next, in the first airflow notch adjustment step S21 of this embodiment, it is determined whether or not a stronger air conditioning effect is necessary based on the change in the difference between the room temperature and the target temperature (fourth determination step S36). This fourth determination step S36 is performed when the determination in the third determination step S35 (third determination unit 28f) is positive. In the fourth determination step S36 of this embodiment, it is determined whether or not a stronger air conditioning effect is necessary in the rooms 7 (first room 7a and second room 7b) where conditioned air Ac is pumped by the fan 13 (first fan 13a).

[0121] In the fourth determination step S36 of this embodiment, the target temperature input to the target temperature input unit 27a shown in Figure 3, and the room temperature input in chronological order to the room temperature input unit 27b are loaded into the working memory 23. Next, in the fourth determination step S36, the fourth determination unit 28g included in the program unit 28 is loaded into the working memory 23. The fourth determination unit 28g is a program for determining whether stronger air conditioning is necessary based on the change in the difference between the room temperature and the target temperature. When this fourth determination unit 28g is executed by the arithmetic unit 21, the control device 15 can function as a means for determining whether stronger air conditioning is necessary.

[0122] The change in the difference between the room temperature and the target temperature can be appropriately identified if it is possible to determine whether or not strong air conditioning is necessary. Figure 8 is a graph that illustrates how to determine whether or not strong air conditioning is necessary. This graph shows the relationship between the difference between the room temperature and the target temperature and time.

[0123] In this embodiment, first, at the first time t1, which is the current time when the fourth determination step S36 is performed, the difference between the room temperature and the target temperature (first temperature difference ΔT1) is determined. This first temperature difference ΔT1 is the temperature difference (negative difference) between the room temperature and the target temperature. In this embodiment, when conditioned air Ac is pumped to multiple rooms 7 (first room 7a and second room 7b) by the first fan 13a, the average value of the first temperature difference ΔT1 of these rooms 7 is determined.

[0124] Next, at the second time t2, which is earlier than the first time t1, the difference between the room temperature and the target temperature (second temperature difference ΔT2) is determined. This second temperature difference ΔT2 is the temperature difference (the negative difference) between the room temperature and the target temperature.

[0125] The second time t2 is specified, for example, as a time 1 to 60 minutes before the first time t1. In this embodiment, when conditioned air Ac is pumped to multiple rooms 7 (first room 7a and second room 7b) by the first fan 13a, the average value of the second temperature difference ΔT2 of these rooms 7 is specified.

[0126] In this embodiment, the value obtained by subtracting the first temperature difference ΔT1 from the second temperature difference ΔT2 is identified as the change in the difference between the room temperature and the target temperature (ΔT2-ΔT1). If this change in temperature difference (ΔT2-ΔT1) is small, the room temperature hardly changes from the second time t2 to the first time t1, even though the first fan 13a is operating at the maximum airflow notch. Therefore, in this embodiment, if the change in temperature difference (ΔT2-ΔT1) is below a predetermined threshold, it is determined that stronger air conditioning is needed in the rooms 7 (first room 7a and second room 7b). The threshold can be set appropriately according to, for example, the time interval between the first time t1 and the second time t2, and may be set to 0.5 to 2.0°C.

[0127] On the other hand, when the temperature difference change (ΔT2-ΔT1) is large, the room temperature approaches the target temperature smoothly due to the operation of the first fan 13a based on the maximum airflow notch. Therefore, when the temperature difference change (ΔT2-ΔT1) is greater than the threshold, it is determined that strong air conditioning is not necessary for the rooms 7 (first room 7a and second room 7b) shown in Figure 1.

[0128] In the fourth decision step S36, if it is determined that stronger air conditioning is needed for the living rooms 7 (first living room 7a and second living room 7b) (Yes in the fourth decision step S36), it is preferable to further increase the rotation speed of the fan 13 (first fan 13a) up to the maximum rotation speed. Therefore, the following rapid operation step S37 is performed.

[0129] On the other hand, if, in the fourth decision step S36, it is determined that strong air conditioning is not necessary for the living spaces 7 (first living space 7a and second living space 7b) (the decision is "No" in the fourth decision step S36), then it is not necessary to increase the rotation speed of the first fan 13a up to the maximum rotation speed. For this reason, the normal operation step S38 is performed, in which the first fan 13a is operated at one of the above-mentioned multiple airflow notches (from low notch to high notch). This suppresses the air conditioning effect from becoming excessively strong, improving the temperature controllability and comfort of the living spaces 7. Furthermore, it suppresses the increase in power consumption of the fan 13, improving energy efficiency.

[0130] [Further increase the rotation speed of fan 13 (rapid operation process)] Next, the first airflow notch adjustment step S21 of this embodiment further increases the rotational speed of the fan 13 (first fan 13a) within the range up to the maximum rotational speed (rapid operation step S37). This rapid operation step S37 is performed when the judgment of the fourth judgment step S36 (fourth judgment unit 28g) is positive.

[0131] In the rapid operation process S37 of this embodiment, first, the rapid operation unit 28c included in the program unit 28 shown in Figure 3 is loaded into the working memory 23. The rapid operation unit 28c is a program for further increasing the rotational speed of the fan 13 (first fan 13a) shown in Figure 1 up to the maximum rotational speed. When this rapid operation unit 28c is executed by the arithmetic unit 21, the control device 15 can be made to function as a means for increasing the rotational speed of the fan 13.

[0132] In this embodiment, because the determination in the third determination step S35 (third determination unit 28f) is positive, there is still room for rotational speed even though the first fan 13a is operating at the maximum airflow notch. Therefore, the rapid operation unit 28c (control device 15) can further increase the rotational speed of the fan 13 (first fan 13a) within the range up to the maximum rotational speed.

[0133] The rotational speed of the first fan 13a is increased as appropriate, within the range from the rotational speed at the maximum airflow notch to the maximum rotational speed. In this embodiment, the rotational speed of the first fan 13a is set to the maximum rotational speed. This allows the largest amount of conditioned air Ac to be pumped to the living rooms 7 (first living room 7a and second living room 7b) where an even stronger air conditioning effect is needed.

[0134] Thus, in the first airflow notch adjustment step S21 of this embodiment, if there is still remaining rotational speed capacity for the first fan 13a even though it is operating at the maximum airflow notch, the rotational speed of the first fan 13a can be increased up to the maximum rotational speed. As a result, more conditioned air Ac is pumped to the living rooms 7 (first living room 7a and second living room 7b) that require a stronger air conditioning effect than when operating at the maximum airflow notch, which can improve the temperature controllability and comfort of the first living room 7a and second living room 7b. In addition, in the rapid operation step S37, the rotational speed of the first fan 13a can be increased up to the maximum rotational speed, and the airflow of conditioned air Ac from the air conditioner 11 may also be increased. As a result, it becomes possible to secure a larger amount of heat processing capacity for the heat exchanger (not shown) of the air conditioner 11 itself, which can further improve temperature controllability.

[0135] [Determine whether strong air conditioning is no longer necessary (5th decision step)] Next, in the first airflow notch adjustment step S21 of this embodiment, after the rapid operation unit 28c (rapid operation step S37) increases the rotation speed of the fan 13 within the range up to the maximum rotation speed, it is determined whether or not strong air conditioning is no longer needed (fifth determination step S33). In this embodiment, this is performed when the determination in step S31 (maximum rotation speed determination unit 28r) which determines whether or not the fan (first fan 13a) is operating at the maximum rotation speed is positive ("Yes" in step S31).

[0136] In the fifth decision step S33, a determination is made as appropriate whether or not strong air conditioning is no longer necessary. In this embodiment, it is determined whether or not strong air conditioning is no longer necessary for rooms 7 (first room 7a and second room 7b) based on the difference between the room temperature and the target temperature. In this embodiment, it is determined whether or not the average value of the first floor obtained in step S5 is less than a predetermined threshold for the score S associated with the difference (negative difference) between the room temperature and the target temperature. The threshold is set as appropriate based on the air conditioning required for rooms 7, for example, it is set to "4.5 points".

[0137] In the fifth determination step S33 of this embodiment, the first-order average value of the score S stored in the average value input unit 27e shown in Figure 3, and the fifth determination unit 28h included in the program unit 28 are loaded into the working memory 23. The fifth determination unit 28h is a program for determining whether or not strong air conditioning is no longer necessary after increasing the rotation speed of the fan 13. By executing this fifth determination unit 28h by the arithmetic unit 21, the control device 15 can be made to function as a means for determining whether or not air conditioning is no longer necessary.

[0138] If the difference between the room temperature and the target temperature (the average value of the score S on the first floor) is less than a predetermined threshold, it is determined that strong air conditioning is no longer necessary for the rooms 7 shown in Figure 1 (the first room 7a and the second room 7b) ("Yes" in the fifth decision step S33). In this case, it is not necessary to continuously increase the rotation speed of the first fan 13a up to the maximum rotation speed. Therefore, if the judgment of the fifth decision unit 28h is positive ("Yes" in the fifth decision step S33), the normal operation step S38 is performed, in which the first fan 13a is operated at one of the above-mentioned multiple airflow notches (from low notch to high notch). This suppresses the air conditioning effect from becoming unnecessarily large, and improves the temperature controllability and comfort of the rooms 7. Furthermore, it suppresses the increase in power consumption of the fan 13, improving energy efficiency.

[0139] On the other hand, if the difference between the room temperature and the target temperature (the average value of score S on the first floor) is greater than or equal to a predetermined threshold, it may be determined that strong air conditioning is continuously required in the rooms 7 (first room 7a and second room 7b) (the fifth determination step S33 is "No"). In this case, it is preferable to continuously increase the rotation speed of the first fan 13a. For this reason, the normal operation step S38 is not performed, and the series of processes in the first airflow notch adjustment step S21 are completed.

[0140] [Operate the fan at one of the multiple airflow notches (normal operation process)] Next, in the first airflow notch adjustment step S21 of this embodiment, the fan 13 (first fan 13a) is operated based on one of the multiple airflow notches (from low notch to high notch) (normal operation step S38).

[0141] The airflow notch of fan 13 can be appropriately determined based on, for example, the target temperature set for each of the living rooms 7 (in this example, the first living room 7a to the fourth living room 7d), the room temperature, etc. As described above, a score S associated with the temperature difference ΔT between the room temperature and the target temperature, and the average value of score S (average value for the first floor, average value for the second floor, and overall average value) are obtained as parameters indicating how well the room temperature has reached the target temperature. For this reason, it is preferable that the airflow notch of fan 13 is determined based on these parameters.

[0142] In the normal operation process S38 of this embodiment, the average value of the points S input to the average value input unit 27e shown in Figure 3, and the normal operation unit 28b included in the program unit 28 are loaded into the working memory 23. The normal operation unit 28b is a program for operating the fan 13 based on one of a plurality of airflow notches (from low notch to high notch) with different airflow settings. When this normal operation unit 28b is executed by the arithmetic unit 21, the control device 15 can function as a means for operating the fan 13 based on one of the plurality of airflow notches.

[0143] The airflow notch of fan 13 is preferably determined based on the average value of the score S of the rooms 7 to which the conditioned air Ac is pumped by fan 13. In this embodiment, the first fan 13a pumps conditioned air Ac to the rooms 7 on the first floor (first room 7a and second room 7b). Therefore, the airflow notch of the first fan 13a is preferably determined based on the average value of the score S of the rooms 7 on the first floor (first room 7a and second room 7b) (first floor average value).

[0144] In this embodiment, the airflow notch of fan 13 is determined based on the correspondence between the average value of the first floor (average value of the second floor) and the airflow notch of fan 13. Figure 9 shows the correspondence between the average value of points S associated with the temperature difference ΔT (average value of the first floor and average value of the second floor) and the airflow notch of fan 13. Note that the correspondence is not limited to this form, and can be set appropriately depending on, for example, the performance of the air conditioner 11, the number and size of the rooms 7 to be air-conditioned, etc.

[0145] As mentioned above, the larger the average value on the first floor, the lower the overall progress in achieving the target temperature in the rooms 7 on the first floor (in this example, the first room 7a and the second room 7b), indicating that stronger air conditioning is required. In this case, among the multiple airflow notches of the fan 13 (first fan 13a), a notch with a large airflow can be determined. By operating the fan 13 based on such an airflow notch, the amount of conditioned air Ac supplied to the rooms 7 on the first floor increases, potentially improving the temperature controllability and comfort of the rooms 7.

[0146] On the other hand, the smaller the average value on the first floor, the better the living room temperature of the living room 7 on the first floor is reaching the target temperature, indicating that strong air conditioning is not necessary. In this case, among the multiple airflow notches, an airflow notch with a small airflow can be selected. By operating the fan 13 (first fan 13a) based on such an airflow notch, the amount of conditioned air Ac supplied to the living room 7 on the first floor is prevented from becoming excessively large, and the temperature controllability and comfort of the living room 7 can be improved. Furthermore, the power consumption of the fan 13 is reduced, improving energy efficiency.

[0147] Thus, in the normal operation process S38 of this embodiment, the fan 13 (first fan 13a) can be operated at an airflow notch determined based, for example, on the difference between the target temperature and the room temperature (temperature difference ΔT) or the average value of the score S associated with the temperature difference ΔT. As a result, the air conditioning method (air conditioning system 1) operates the fan 13 according to the degree to which the room temperature has reached the target temperature, thereby improving the temperature controllability, comfort, and energy saving of the room 7.

[0148] In the normal operation process S38, it is preferable that the multiple fans 13 (first fan 13a and second fan 13b) are operated such that the total airflow of the multiple fans 13 is greater than the airflow of the conditioned air Ac from the air conditioner 11. This makes it possible for the air conditioning method (air conditioning system 1) to ventilate and air condition multiple rooms 7 while circulating the air Ai in the building 2, while suppressing the stagnation of the conditioned air Ac in the chamber box 17.

[0149] [Adjust the airflow notch of the second fan (second airflow notch adjustment process)] As shown in Figure 6, in the fan airflow notch adjustment step S6 of this embodiment, the airflow notch of the second fan 13b shown in Figure 1 is adjusted (second airflow notch adjustment step S22). In the second airflow notch adjustment step S22 of this embodiment, the airflow notch of the second fan 13b is adjusted based on the same procedure as the processing procedure of the first airflow notch adjustment step S21 shown in Figure 7.

[0150] In the second airflow notch adjustment step S22, if there is still remaining rotational speed capacity for the second fan 13b even though it is operating at the maximum airflow notch, the rotational speed of the second fan 13b can be increased up to the maximum rotational speed. As a result, more conditioned air Ac is supplied to the living rooms 7 (in this example, the third living room 7c and the fourth living room 7d) that require strong air conditioning than when operating at the maximum airflow notch, thereby improving the temperature controllability and comfort of these living rooms 7.

[0151] Furthermore, in the fifth decision step S33, if strong air conditioning is no longer needed after increasing the rotation speed of the second fan 13b, the normal operation step S38 is performed. This prevents the air conditioning from becoming excessively strong, thereby improving the temperature controllability and comfort of the living room 7.

[0152] As shown in Figure 6, in the fan airflow notch adjustment step S6 of this embodiment, the first airflow notch adjustment step S21 and the second airflow notch adjustment step S22 are performed. As a result, in the second determination step S34 (second determination unit 28e) shown in Figure 7, the fan that is operating at the maximum airflow notch among the multiple fans 13 (first fan 13a and second fan 13b) is identified. Next, in the third determination step S35 (third determination unit 28f), it is determined whether the rotation speed of the fan 13 identified in the second determination step S34 is less than the maximum rotation speed. Next, in the fourth determination step S36 (fourth determination unit 28g), it is determined whether a stronger air conditioning effect is necessary for the living room 7 to which conditioned air Ac is pumped from the fan 13 identified in the second determination step S34. Then, in the rapid operation process S37 (rapid operation unit 28c), if the judgments in the third judgment process S35 and the fourth judgment process S36 are both positive, the fan rotation speed identified in the second judgment process S34 is further increased up to the maximum rotation speed.

[0153] Thus, in this embodiment, even if multiple fans 13 are provided to pump conditioned air Ac to multiple rooms 7 through each of the multiple ducts 12, the airflow notch of each fan 13 can be adjusted individually. As a result, more conditioned air Ac can be pumped to rooms 7 that require strong air conditioning (first room 7a to fourth room 7d) than when operating at the maximum airflow notch, thereby improving the temperature controllability and comfort of these rooms 7.

[0154] Furthermore, the air conditioning method (air conditioning system 1) of this embodiment switches between a normal operation process S38 and a rapid operation process S37 depending on how close the room temperature is to reaching the target temperature. As a result, the air conditioning method (air conditioning system 1) can flexibly change the airflow notch of the fan 13 so that the room temperature approaches the target temperature in response to the effects of constantly changing solar radiation, outside air, and heat generated by daily life. Therefore, the air conditioning method (air conditioning system 1) can improve the temperature controllability and comfort of the room.

[0155] As shown in Figure 6, the fan airflow notch adjustment process S6 of this embodiment is exemplified as including a first airflow notch adjustment process S21 and a second airflow notch adjustment process S22, but is not limited to this embodiment. For example, if the fan 13 consists only of the first fan 13a, the fan airflow notch adjustment process S6 may consist only of the first airflow notch adjustment process S21. Also, if the fan 13 consists only of the second fan 13b, the fan airflow notch adjustment process S6 may consist only of the second airflow notch adjustment process S22. Furthermore, if other fans (not shown) different from the first fan 13a and the second fan 13b are included, a process (not shown) for adjusting the airflow notch of those fans may be included.

[0156] [Adjust damper opening] Next, as shown in Figure 4, in the air conditioning method of this embodiment, the opening degree of the damper 20 shown in Figure 1 may be adjusted (step S7). When multiple dampers 20 (in this example, the first damper 20a to the fourth damper 20d) are provided, as in this embodiment, the opening degree of each damper 20 is adjusted.

[0157] In this embodiment, the opening degree of the dampers 20 (in this example, the first damper 20a to the fourth damper 20d) can be adjusted based on the target temperature set for each of the living rooms 7 (in this example, the first living room 7a to the fourth living room 7d), or the room temperature, etc. As described above, a score S associated with the temperature difference between the room temperature and the target temperature is obtained as a parameter indicating how well the room temperature has reached the target temperature. For this reason, it is preferable that the opening degree of the dampers 20 be adjusted based on these parameters.

[0158] In step S7 of this embodiment, the scores S of each living room 7 (in this example, the first living room 7a to the fourth living room 7d) input to the score input unit 27d shown in Figure 3, and the damper opening adjustment unit 28o included in the program unit 28 shown in Figure 3 are loaded into the working memory 23. The damper opening adjustment unit 28o is a program for adjusting the opening degree of the dampers 20 (in this example, the first damper 20a to the fourth damper 20d) shown in Figure 1. By executing this damper opening adjustment unit 28o by the arithmetic unit 21, the control device 15 can be made to function as a means for adjusting the opening degree of the dampers 20.

[0159] Preferably, the opening degree of the dampers 20 (in this example, the first damper 20a to the fourth damper 20d) is determined based on the score S of each room 7 (first room 7a to fourth room 7d) in which the dampers 20 are installed. In this case, the opening degree of the first damper 20a is determined based on the score S of the first room 7a. The opening degree of the second damper 20b is determined based on the score S of the second room 7b. The opening degree of the third damper 20c is determined based on the score S of the third room 7c. The opening degree of the fourth damper 20d is determined based on the score S of the fourth room 7d.

[0160] Figure 10 shows the correspondence between the point S associated with the temperature difference ΔT and the damper opening degree. Note that the correspondence is not limited to this form and can be set appropriately depending on, for example, the performance of the air conditioner 11, the number and size of the rooms 7 to be air-conditioned, etc.

[0161] As described above, in rooms 7 with a high score S, the degree to which the room temperature reaches the target temperature is low, and strong air conditioning is required. In this case, one of the multiple openings of the damper 20 is determined to be the largest. By adjusting the damper 20 to such a large opening, even if the airflow of the fan 13 (first fan 13a or second fan 13b) is set to a small amount, the amount of conditioned air Ac supplied to rooms 7 that require strong air conditioning becomes relatively large. This can improve the temperature controllability and comfort of rooms 7.

[0162] On the other hand, in rooms 7 with a small score S, the degree to which the room temperature reaches the target temperature is high, and strong air conditioning is unnecessary. In this case, a small opening is determined from among the multiple openings of the damper 20. By adjusting the damper 20 to such a small opening, even if the airflow of the fan 13 (first fan 13a or second fan 13b) is set to a large value, for example, the amount of conditioned air Ac supplied to rooms 7 where strong air conditioning is unnecessary is suppressed from becoming excessively large. This can improve the temperature controllability and comfort of rooms 7. Furthermore, as shown in Figure 9, when the fan 13 is set to the strong notch (maximum airflow notch) or higher, the average value of the score S becomes 4.0 points or higher, so the scores S of multiple rooms 7 (shown in Figure 10) also become large values, and each damper 20 in multiple rooms 7 is set to a large opening. This can suppress the increase in pressure loss of conditioned air Ac that is likely to occur when the opening of some dampers 20 is set to a small value.

[0163] [Adjust the operation of the air conditioner] Next, in the air conditioning method of this embodiment, the operation of the air conditioner 11 shown in Figure 1 is adjusted (step S8). In step S8 of this embodiment, the set temperature of the air conditioner 11 and the airflow rate of the indoor unit fan 16c are adjusted.

[0164] The set temperature of the air conditioner 11 and the airflow rate of the indoor unit fan 16c shown in Figure 1 can be appropriately determined based on, for example, the target temperature set for each of the living rooms 7 (in this example, the first living room 7a to the fourth living room 7d), the room temperature, etc. In this embodiment, a score S associated with the temperature difference between the room temperature and the target temperature, and the average value of the score S (average value for the first floor, average value for the second floor, and overall average value) are obtained as parameters indicating how well the room temperature has reached the target temperature. Therefore, it is preferable that the set temperature of the air conditioner 11 and the airflow rate of the indoor unit fan 16c are determined based on these parameters.

[0165] In step S8 of this embodiment, the average value of the points S input to the average value input unit 27e shown in Figure 3, and the air conditioning operation adjustment unit 28n included in the program unit 28 shown in Figure 3 are loaded into the working memory 23. The air conditioning operation adjustment unit 28n is a program for adjusting the operation of the air conditioner 11 shown in Figure 1 (in this example, the set temperature of the air conditioner 11 and the airflow rate of the indoor unit fan 16c). By executing this air conditioning operation adjustment unit 28n by the arithmetic unit 21, the control device 15 can be made to function as a means for adjusting the operation of the air conditioner 11.

[0166] In step S8 of this embodiment, first, the set temperature of the air conditioner is determined. In this embodiment, for example, the set temperature of the air conditioner 11 is determined based on the following equation (1). E = R + C … (1) Here, E: Set temperature R: Reference temperature C: Adjustment temperature

[0167] In equation (1) above, the reference temperature R can be set as appropriate, provided that the temperature controllability and comfort of the living room 7 can be improved. During heating operation, the highest target temperature among the multiple living rooms 7 (first living room 7a to fourth living room 7d) is set as the reference temperature R. During cooling operation, the lowest target temperature among the multiple living rooms 7 (first living room 7a to fourth living room 7d) is set as the reference temperature R.

[0168] In equation (1) above, the regulated temperature C can be appropriately determined based, for example, on the average value of the points S associated with the temperature difference ΔT between the room temperature and the target temperature (in this example, the overall average value). In this embodiment, it is preferable that the regulated temperature C is determined based on the correspondence between the overall average value and the regulated temperature C. Figure 11 shows the correspondence between the average value of the points S associated with the temperature difference ΔT (overall average value) and the regulated temperature C. Note that the correspondence is not limited to this form, and can be appropriately set according to, for example, the performance of the air conditioner 11, the number and size of the rooms 7 to be air-conditioned, etc.

[0169] As mentioned above, a large overall average value indicates that the overall achievement of the room temperature relative to the target temperature in the multiple rooms 7 (in this example, rooms 1-7a to 4-7d) in building 2 is low, and that strong air conditioning is required. In this case, as shown in Figure 11, the larger the overall average value, the higher the regulated temperature C will be set (to a high value) during heating operation of the air conditioner 11, and the lower the regulated temperature C will be set (to a low value) during cooling operation. Based on this regulated temperature C, the set temperature E of the air conditioner 11 is determined, which increases the air conditioning load of the air conditioner 11 and can improve the temperature controllability and comfort of the rooms 7.

[0170] On the other hand, a small overall average value indicates that the room temperature of the multiple rooms 7 in building 2 as a whole is reaching the target temperature well, and that strong air conditioning is not necessary. In this case, as shown in Figure 11, the smaller the overall average value, the lower the controlled temperature C is set to (a lower value) when the air conditioner 11 is in heating operation, and the higher the controlled temperature C is set to (a higher value) when it is in cooling operation. By determining the set temperature E of the air conditioner 11 based on such a controlled temperature C, the air conditioning load (heating load) of the air conditioner 11 is reduced, and energy saving is improved.

[0171] Next, in step S8 of this embodiment, the airflow rate of the indoor unit fan 16c is determined. In this embodiment, for example, the airflow rate of the indoor unit fan 16c may be determined based on the average value of points S associated with the temperature difference ΔT between the room temperature and the target temperature (in this example, the overall average value). In this embodiment, it is preferable that the airflow rate of the indoor unit fan 16c is determined based on the correspondence between the overall average value and the airflow rate of the indoor unit fan 16c. Figure 12 is a diagram showing the correspondence between the average value of points S associated with the temperature difference ΔT (overall average value) and the airflow rate of the indoor unit fan 16c. Note that the correspondence is not limited to this form, and may be set appropriately depending on, for example, the performance of the air conditioner 11, the number and size of the rooms 7 to be air-conditioned, etc.

[0172] As mentioned above, a high overall average value indicates that the overall progress of the room temperatures in the multiple rooms 7 (in this example, rooms 1-7a to 4-7d) in building 2 is slower than the target temperature, and that strong air conditioning is required. In this case, a large airflow can be determined from among the multiple airflows of the indoor unit fan 16c. By operating the air conditioner 11 based on this airflow, the supply of conditioned air Ac increases, which can improve the temperature controllability and comfort of the rooms 7.

[0173] On the other hand, a small overall average value indicates that the room temperature of the multiple living spaces 7 in building 2 is reaching the target temperature well, and that strong air conditioning is not necessary. In this case, a small airflow rate can be selected from among the multiple airflow rates of the indoor unit fan 16c. By operating the air conditioning unit 11 based on this airflow rate, energy efficiency is improved.

[0174] In the air conditioning method (air conditioning system 1) of this embodiment, even if the temperature difference ΔT of each room 7 is different, the set temperature of the air conditioner 11 is determined based on the average value (overall average) of the score S associated with the intermediate (averaged) temperature difference ΔT. Furthermore, in this embodiment, the airflow rate of the indoor unit fan 16c is determined based on the average value (overall average) of the score S. Then, the air conditioner 11 is operated based on these determined set temperature and airflow rate. As a result, the air conditioning method (air conditioning system 1) of this embodiment makes it possible to improve the temperature control and comfort of the rooms 7, as well as energy saving, compared to conventional air conditioning methods in which the air conditioner 11 was operated according to the room 7 with the lowest level of air conditioning.

[0175] In this embodiment, similar to the airflow notch of fan 13, the set temperature of the air conditioner 11 and the airflow of the indoor unit fan 16c are determined based on the average value of points S associated with the temperature difference ΔT. As a result, the air conditioning method (air conditioning system 1) can adjust both the operation of the air conditioner 11 (including the indoor unit fan 16c) and the operation of fan 13 according to how well the room temperature has reached the target temperature. Therefore, the air conditioning method (air conditioning system 1) can improve the temperature controllability, comfort, and energy efficiency of the room 7.

[0176] In step S8, for example, if the average value (overall average) of the points associated with the temperature difference ΔT is small and operation of the air conditioner 11 is unnecessary, the operation of the air conditioner 11 may be stopped. This further improves energy efficiency while suppressing unnecessary air conditioning to the living room 7.

[0177] [Determine whether or not there is an instruction to end air conditioning operation] Next, in the air conditioning method of this embodiment, as shown in Figure 4, it is determined whether or not there is an instruction to end the air conditioning operation (step S9). In step S9 of this embodiment, the termination determination unit 28m included in the program unit 28 shown in Figure 3 is loaded into the working memory 23. This termination determination unit 28m is a program for determining whether or not there is an instruction to end the air conditioning operation. By executing this termination determination unit 28m by the arithmetic unit 21, the control device 15 can be made to function as a means for determining whether or not there is an instruction to end the air conditioning operation.

[0178] The determination of whether or not there is an instruction to terminate the air conditioning operation is made based, for example, on instruction data entered by the user (resident) or others into the input device 24 (shown in Figures 1 and 3), or on the occurrence of an abnormal termination such as an interrupt process.

[0179] In this embodiment, if it is determined that there is an instruction to end the air conditioning operation ("Yes" in step S9), step S10, which ends the air conditioning operation, is performed. On the other hand, if it is determined that there is no instruction to end the air conditioning operation ("No" in step S9), steps S2 to S9 are performed again.

[0180] The air conditioning method (air conditioning system 1) of this embodiment can deliver more conditioned air Ac to the living room 7, which requires a strong air conditioning effect, from the start to the end of air conditioning operation, than when operating at the maximum airflow notch. As a result, the air conditioning method (air conditioning system 1) of this embodiment can improve the temperature control and comfort of the living room 7 even when used in environments exceeding expectations due to the influence of constantly changing solar radiation, outside air, and heat generated by daily life.

[0181] [End of air conditioning operation] Next, in the air conditioning method of this embodiment, if the judgment in step S9 is positive, the air conditioning operation is terminated (step S10). In step S10 of this embodiment, the air conditioning termination unit 28k included in the program unit 28 shown in Figure 3 is loaded into the working memory 23. This air conditioning termination unit 28k is a program for terminating the air conditioning of the multiple rooms 7 shown in Figure 1 (in this example, the first room 7a to the fourth room 7d). When this air conditioning termination unit 28k is executed by the arithmetic unit 21, the control device 15 can be made to function as a means for terminating the air conditioning operation.

[0182] In step S10 of this embodiment, the air conditioning termination unit 28k (control device 15) terminates the air conditioning operation (heating operation or cooling operation) by the air conditioner 11. This terminates the air conditioning to the multiple rooms 7 (in this example, the first room 7a to the fourth room 7d). On the other hand, the operation of the fan 13 and the outside air supply fan 19 may be continued in order to maintain ventilation of the building 2. In this case, the airflow notch of the fan 13 and the airflow of the outside air supply fan 19 are set appropriately, for example, based on the number of ventilations required for the building 2.

[0183] Although particularly preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the illustrated embodiments and can be implemented in various modified forms.

[0184] [Note] The present invention includes the following embodiments.

[0185] [Invention 1] An air conditioning system for providing air conditioning to at least one habitable room within a building, Air conditioner and, At least one duct for transporting the conditioned air generated by the air conditioner to the living room, At least one fan for pressurizing the conditioned air into the living room via the duct, A room temperature sensor for measuring the room temperature, which is the temperature of the aforementioned room, Includes a control device for receiving a signal from the room temperature sensor and controlling the operation of the fan, The aforementioned fan has a predetermined maximum rotation speed. The control device is A target temperature input unit into which the target temperature of the aforementioned room is input, A room temperature acquisition unit for acquiring the room temperature from the room temperature sensor, A normal operation unit that operates the fan based on one of a plurality of airflow notches set to different airflow rates, A first determination unit that determines whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold, If the determination of the first determination unit is positive, a second determination unit determines whether the fan is operating at the maximum airflow notch, which has the largest airflow among the plurality of airflow notches, If the determination of the second determination unit is positive, a third determination unit determines whether the rotational speed of the fan is less than the maximum rotational speed, If the determination of the third determination unit is positive, a fourth determination unit determines whether or not stronger air conditioning is necessary based on the change in the difference between the room temperature and the target temperature, The system includes a rapid operation unit that, when the determination of the fourth determination unit is positive, further increases the rotational speed of the fan within the range up to the maximum rotational speed, The building's air conditioning system. [Invention 2] The system further includes a fifth determination unit that determines that the strong air conditioning is no longer necessary when the difference between the room temperature and the target temperature falls below the threshold after the rapid operation unit has increased the rotation speed of the fan, The building air conditioning system according to the present invention 1, wherein the normal operation unit operates the fan based on one of the plurality of airflow notches when the determination of the fifth determination unit is positive. [Invention 3] Multiple such rooms are provided within the building. The ducts include multiple ducts connected to each of the multiple rooms, The fan includes a plurality of units that pump the conditioned air to the plurality of rooms through each of the plurality of ducts. The building air conditioning system according to the present invention 1 or 2, wherein the normal operation unit operates each of the plurality of fans based on one of the plurality of airflow notches. [4th Invention] The building air conditioning system according to the present invention, wherein the normal operation unit operates the plurality of fans such that the total airflow of the plurality of fans is greater than the airflow of the conditioned air from the air conditioner. [5th ​​Invention] The first determination unit identifies the fan among the plurality of fans that is operating at the maximum airflow notch, The second determination unit determines whether the rotational speed of the fan identified by the first determination unit is less than the maximum rotational speed, The third determination unit determines, based on the change in the difference between the room temperature and the target temperature, whether or not a stronger air conditioning action is necessary for the room from which the conditioned air is pumped by the fan identified by the first determination unit. The building air conditioning system according to the present invention 3 or 4, wherein the rapid operation unit further increases the rotational speed of the fan identified by the first determination unit up to the maximum rotational speed when both the determination of the second determination unit and the determination of the third determination unit are positive. [Invention 6] A method for air-conditioning at least one habitable room within a building using an air conditioning system, The aforementioned air conditioning system is Air conditioner and, At least one duct for transporting the conditioned air generated by the air conditioner to the living room, At least one fan for pressurizing the conditioned air into the living room via the duct, Includes a room temperature sensor for measuring the room temperature, which is the temperature of the room, The aforementioned fan has a predetermined maximum rotation speed. The aforementioned method, The process of inputting the target temperature of the aforementioned room, A step of obtaining the room temperature from the room temperature sensor, A normal operation process in which the fan is operated based on one of a plurality of airflow notches set to different airflow rates, A first determination step of determining whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold, If the determination in the first determination step is positive, a second determination step determines whether the fan is operating at the maximum airflow notch, which has the largest airflow among the plurality of airflow notches. If the determination in the second determination step is positive, a third determination step is made to determine whether the rotational speed of the fan is less than the maximum rotational speed. If the determination in the third determination step is positive, a fourth determination step is made to determine whether or not stronger air conditioning is necessary based on the change in the difference between the room temperature and the target temperature. If the determination in the fourth determination step is positive, the process includes a rapid operation step in which the rotational speed of the fan is further increased within the range up to the maximum rotational speed. Air conditioning methods for buildings. [Explanation of Symbols]

[0186] 1. Air conditioning system 7 Room 11. Air conditioner 12 ducts 13 Fans 14. Room temperature sensor 15 Control device

Claims

1. An air conditioning system for providing air conditioning to at least one habitable room within a building, Air conditioner and, At least one duct for transporting the conditioned air generated by the air conditioner to the living room, At least one fan for pressurizing the conditioned air into the living room via the duct, A room temperature sensor for measuring the room temperature, which is the temperature of the aforementioned room, Includes a control device for receiving a signal from the room temperature sensor and controlling the operation of the fan, The aforementioned fan has a predetermined maximum rotation speed. The control device is A target temperature input unit into which the target temperature of the aforementioned room is input, A room temperature acquisition unit for acquiring the room temperature from the room temperature sensor, A normal operation unit that operates the fan based on one of a plurality of airflow notches set to different airflow rates, A first determination unit that determines whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold, If the determination of the first determination unit is positive, a second determination unit determines whether the fan is operating at the maximum airflow notch, which has the largest airflow among the plurality of airflow notches, If the determination of the second determination unit is positive, a third determination unit determines whether the rotational speed of the fan is less than the maximum rotational speed, If the third determination unit makes a positive determination, a fourth determination unit determines whether or not stronger air conditioning is necessary based on the change in the difference between the room temperature and the target temperature. A building air conditioning system, comprising a rapid operation unit that, when the determination of the fourth determination unit is positive, further increases the rotational speed of the fan within the range up to the maximum rotational speed.

2. The system further includes a fifth determination unit that determines that the strong air conditioning is no longer necessary when the difference between the room temperature and the target temperature falls below the threshold after the rapid operation unit has increased the rotation speed of the fan, The building air conditioning system according to claim 1, wherein the normal operation unit operates the fan based on one of the plurality of airflow notches when the determination of the fifth determination unit is positive.

3. Multiple such rooms are provided within the building. The ducts include multiple ducts connected to each of the multiple rooms, The fan includes a plurality of units that pump the conditioned air to the plurality of rooms through each of the plurality of ducts. The building air conditioning system according to claim 1, wherein the normal operation unit operates each of the plurality of fans based on any of the plurality of airflow notches.

4. The building air conditioning system according to claim 3, wherein the normal operation unit operates the plurality of fans such that the total airflow of the plurality of fans is greater than the airflow of the conditioned air from the air conditioner.

5. The first determination unit identifies the fan among the plurality of fans that is operating at the maximum airflow notch, The second determination unit determines whether the rotational speed of the fan identified by the first determination unit is less than the maximum rotational speed, The third determination unit determines, with respect to the room to which the conditioned air is pumped from the fan identified by the first determination unit, whether or not a stronger air conditioning action is necessary, based on the change in the difference between the room temperature and the target temperature. The building air conditioning system according to claim 3 or 4, wherein the rapid operation unit further increases the rotational speed of the fan identified by the first determination unit up to the maximum rotational speed when both the determination of the second determination unit and the determination of the third determination unit are positive.

6. A method for air-conditioning at least one habitable room within a building using an air conditioning system, The aforementioned air conditioning system is Air conditioner and, At least one duct for transporting the conditioned air generated by the air conditioner to the living room, At least one fan for pressurizing the conditioned air into the living room via the duct, Includes a room temperature sensor for measuring the room temperature, which is the temperature of the room, The aforementioned fan has a predetermined maximum rotation speed. The aforementioned method, The process of inputting the target temperature of the aforementioned room, A step of obtaining the room temperature from the room temperature sensor, A normal operation process in which the fan is operated based on one of a plurality of airflow notches set to different airflow rates, A first determination step of determining whether the difference between the room temperature and the target temperature is greater than or equal to a predetermined threshold, If the determination in the first determination step is positive, a second determination step determines whether the fan is operating at the maximum airflow notch, which has the largest airflow among the plurality of airflow notches. If the determination in the second determination step is positive, a third determination step is made to determine whether the rotational speed of the fan is less than the maximum rotational speed. If the judgment in the third judgment step is positive, a fourth judgment step is performed to determine whether or not stronger air conditioning is necessary based on the change in the difference between the room temperature and the target temperature. If the determination in the fourth determination step is positive, the process includes a rapid operation step in which the rotational speed of the fan is further increased within the range up to the maximum rotational speed. Air conditioning methods for buildings.

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