Air conditioning system

Abstract

To provide an air conditioning system capable of securing an outside air introduction amount required in a habitable room, in ventilation using personal air conditioning.SOLUTION: An air conditioning system 1 includes: an outdoor unit 20 which supplies temperature-conditioned air CA1 containing outside air OA1; and a plurality of blowout ports 30 which are arranged on a floor 10F, blow out the temperature-conditioned air CA1 at an air amount that is individually adjustable by an operator 2 with respect to a stay region 11A where the operator 2 is staying out of a plurality of work regions 11, and blow out the temperature-conditioned air CA1 with respect to a non-stay region 13 where the operator 2 is not staying in a habitable room 10. An air amount of the temperature-conditioned air CA1 blown out from the blowout ports 30 for blowing out the temperature-conditioned air CA1 to the non-stay region 13 is adjusted in such a manner that the total amount of the outside air OA1 contained in the temperature-conditioned air CA1 blown out per unit time from the plurality of blowout ports 30 satisfies an introduction amount of the outside air OA1 required in the habitable room 10.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Personal air conditioning that individually conditions the work area where a worker works is known as an example of air conditioning in an office, etc. For example, Patent Document 1 describes an air conditioning device that individually conditions the seated living area where a desk is placed indoors, as an example of personal air conditioning.

[0003] This air conditioner is configured to blow out temperature-controlled air from a floor outlet provided on the floor surface of the room. The floor outlet is connected to an outdoor air conditioner via an underfloor space and an air conditioning duct. The air conditioner takes in outside air and adjusts the temperature and humidity of the air that has been mixed with the outside air and the return air from the room, and then blows the mixed air to the floor outlet as temperature-controlled air. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-144978 A Summary of the Invention [Problem to be solved by the invention]

[0005] In personal air conditioning, the volume of temperature-controlled air sent from each air outlet to the work area is set individually according to the worker's thermal sensation. Meanwhile, since the supply of outside air (ventilation) is necessary in the room to keep the worker alive, it is preferable to carry out ventilation and personal air conditioning simultaneously. Therefore, when ventilating the room using personal air conditioning, it is necessary to consider the amount of outside air required for the entire room while supplying the work area with temperature-controlled air according to the worker's thermal sensation. [Means for solving the problem]

[0006] An air conditioning system that solves the above-mentioned problems is an air conditioning system that individually conditions multiple work areas within a room where a worker works, and includes an outdoor air conditioning unit that supplies temperature-controlled air that has been adjusted to include air that includes outside air taken in from outdoors, and a plurality of air outlets that are arranged on the floor of the room, the plurality of air outlets including an air outlet that blows the temperature-controlled air to a stay area among the plurality of work areas where the worker is staying at an air volume that can be individually adjusted by the worker, and an air outlet that blows the temperature-controlled air to a non-stay area within the room where the worker is not staying, a detection unit that detects a carbon dioxide concentration in the room, an outside air volume adjustment unit that adjusts the amount of the outside air contained in the temperature-controlled air supplied from the outdoor air conditioning unit in accordance with the carbon dioxide concentration, and an air outlet volume adjustment unit that adjusts the volume of the temperature-controlled air blown out from the air outlet that blows the temperature-controlled air to the non-stay area so that the sum of the amount of outside air contained in the temperature-controlled air blown out from the plurality of air outlets per unit time satisfies the amount of outside air introduced per unit time required in the room. Effect of the Invention

[0007] According to the present invention, the amount of outside air required to be introduced into a room can be ensured in ventilation using personal air conditioning. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an air conditioning system. [Diagram 2] FIG. 2 is a block diagram showing the device configuration of the air conditioning system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Air conditioning system] An embodiment of an air conditioning system will be described with reference to FIGS. As shown in Fig. 1, an air conditioning system 1 performs air conditioning in a room 10. The room 10 is a large space such as an office where many workers 2 can stay. Part or all of the room 10 may have an open atrium that connects multiple floors.

[0010] The room 10 is provided with a plurality of work areas 11 where the workers 2 can perform their work. The work areas 11 are spaces within the room 10 that are assigned to each worker 2. For example, the work areas 11 are provided with equipment such as desks and chairs for the workers 2 to perform their work. In this embodiment, "work" refers to work performed using the body or intellect. As an example, the workers 2 are office workers who perform work (tasks) in the work areas 11 where desks and chairs are provided in the room 10 configured as an office.

[0011] A human presence sensor 11S is disposed in each work area 11. The human presence sensor 11S is an example of a detection unit that detects whether or not a worker 2 is present in each work area 11. The human presence sensor 11S is an infrared sensor, for example. The human presence sensor 11S may be disposed, for example, on a desk disposed in the work area 11 or on the floor 10F of the room 10 in the work area 11, or may be disposed in an area other than the work area 11, such as the ceiling 10C of the room 10.

[0012] Of the multiple work areas 11, the manned work area 11 where the worker 2 is staying is the stay area 11A. Of the multiple work areas 11, the unmanned work area 11 where the worker 2 is not staying is the unmanned area 11B. The air conditioning system 1 performs personal air conditioning (task air conditioning) in the room 10, which individually conditions the stay area 11A.

[0013] In the room 10, an area that is not used as the work area 11 and where no work is performed by the worker 2 is the non-work area 12. The non-work area 12 is an area of ​​the space within the room 10 that is not assigned as the work area 11, and is an area of ​​the space within the room 10 other than the work area 11. The non-work area 12 is, for example, an area where no equipment for the worker 2 to perform work is located. The non-work area 12 is, for example, a passageway or dead space that is difficult to use as the work area 11.

[0014] In the room 10, an area where the worker 2 is not present is a non-stay area 13. The non-stay area 13 includes an unmanned area 11B which is an unmanned work area 11, and a non-work area 12 which is not used as the work area 11.

[0015] The air conditioning system 1 includes an air conditioner 3. The air conditioner 3 takes in air from the living room 10, adjusts the temperature and humidity, and then blows the taken-in air into the living room 10 to circulate the air in the living room 10. The air conditioner 3 includes an indoor unit 3A. The indoor unit 3A is disposed, for example, on a ceiling 10C of the living room 10. The air conditioning system 1 performs ambient air conditioning, which is air conditioning for the entire living room 10, by using cool air or hot air blown from the indoor unit 3A of the air conditioner 3. Note that the indoor unit 3A may be disposed, for example, on a wall 10W of the living room 10 instead of the ceiling 10C. The indoor unit 3A may also be disposed, for example, in an upper space 6 provided above the ceiling 10C. In this case, the indoor unit 3A may blow air into the living room 10 through, for example, a duct and an air outlet.

[0016] The air conditioning system 1 includes an outdoor air conditioner 20. The outdoor air conditioner 20 supplies temperature-controlled air CA1, which is air including outdoor air OA1, into the living room 10. In detail, the outdoor air conditioner 20 takes in outdoor air OA1 from the outdoors and takes in air IA1 inside the living room 10 as return air RA1. The outdoor air conditioner 20 supplies air, which has been temperature-controlled by mixing the outdoor air OA1 and the return air RA1, to a lower space 4 provided below the floor 10F of the living room 10 as temperature-controlled air CA1. The outdoor air conditioner 20 supplies the temperature-controlled air CA1 to the lower space 4 so that the lower space 4 has a predetermined pressure. The outdoor air conditioner 20 may adjust the humidity of the outdoor air OA1 and the return air RA1 in addition to adjusting the temperature, and may remove impurities using a filter or the like.

[0017] The air conditioning system 1 includes a plurality of air outlets 30. The plurality of air outlets 30 are arranged on the floor 10F of the living room 10. The air outlets 30 individually blow out the temperature-controlled air CA1 supplied from the outdoor air-conditioning unit 20 to the lower space 4 from the lower space 4 toward each area in the living room 10. The temperature-controlled air CA1 blown out from each air outlet 30 is maintained at a predetermined temperature by the outdoor air-conditioning unit 20.

[0018] The air conditioning system 1 includes, as an example of the configuration of the multiple air outlets 30, multiple individual air outlets 31 and an outside air introduction air outlet 32. The individual air outlets 31 individually blow out the temperature regulated air CA1 from the lower space 4 toward the work area 11. The outside air introduction air outlets 32 individually blow out the temperature regulated air CA1 from the lower space 4 toward the non-work area 12.

[0019] For example, one individual air outlet 31 is provided for each work area 11. The individual air outlet 31 is responsible for personal air conditioning in the air conditioning system 1. One or more outside air introduction air outlets 32 are provided for the non-work area 12. The outside air introduction air outlets 32 are used in the air conditioning system 1 to ensure the required amount of outside air OA1 to be introduced into the room 10 when the amount of outside air OA1 introduced into the room 10 is insufficient with personal air conditioning alone. In the following, when there is no need to distinguish between the individual air outlets 31 and the outside air introduction air outlets 32, they will simply be referred to as air outlets 30.

[0020] The air volume of each air outlet 30 is adjusted by a control device 50, which will be described later. Each individual air outlet 31 is configured so that the air volume of the temperature-controlled air CA1 can be individually adjusted by the worker 2. For example, the air outlet 30 is provided with a cover for adjusting the opening ratio, and the air volume is adjusted by opening and closing the opening of the air outlet 30 with the cover. For example, the air volume (maximum air volume) of the individual air outlet 31 when the cover is fully open is 20 m 3 / h or more 40m 3 / h or less, for example 30m 3 / h.

[0021] In the air conditioning system 1, the outside air OA1 required in the living room 10 is introduced (ventilated) by the temperature regulated air CA1 blown out from the multiple individual air outlets 31 and the temperature regulated air CA1 blown out from the outside air introduction air outlet 32. That is, in the air conditioning system 1, the sum of the amount of the outside air OA1 contained in the temperature regulated air CA1 blown out per unit time from the multiple individual air outlets 31 and the outside air introduction air outlet 32 ​​satisfies the amount of outside air OA1 introduced per unit time required in the living room 10.

[0022] Of the multiple air outlets 30, the individual air outlet 31 that blows out the temperature-regulated air CA1 to the stay area 11A is an example of a first air outlet 30A. Of the multiple air outlets 30, the individual air outlet 31 that blows out the temperature-regulated air CA1 to the uninhabited area 11B as the non-stay area 13 is an example of a second air outlet 30B. Of the multiple air outlets 30, the outside air introduction air outlet 32 ​​that blows out the temperature-regulated air CA1 to the non-work area 12 as the non-stay area 13 is an example of a third air outlet 30C.

[0023] A ceiling 10C of the living room 10 is provided with a plurality of ventilation openings 5. The ventilation openings 5 ​​connect the living room 10 to an upper space 6 provided above the ceiling 10C. Air IA1 in the living room 10 is sent to the outdoor air-conditioning unit 20 as return air RA1 through the plurality of ventilation openings 5 ​​and the upper space 6.

[0024] In the air conditioning system 1, temperature-controlled air CA1, which is a mixture of outside air OA1 and return air RA1 in the outdoor air conditioning unit 20, is supplied into the living room 10 from multiple air outlets 30 via the lower space 4. Air IA1 in the living room 10 is sent to the outdoor air conditioning unit 20 as return air RA1 via the upper space 6. In the air conditioning system 1, personal air conditioning of the work area 11 of the living room 10 and introduction (ventilation) of outside air OA1 into the living room 10 are performed simultaneously as described above.

[0025] The air conditioning system 1 includes a detection unit 40. The detection unit 40 detects the carbon dioxide concentration in the air IA1 in the living room 10. The detection unit 40 is provided, for example, near the ventilation opening 5 in the upper space 6 or near the ventilation opening 5 in the ceiling 10C. The detection unit 40 is preferably provided in multiple locations according to the size of the living room 10 so that the overall carbon dioxide concentration in the living room 10 can be grasped.

[0026] The air conditioning system 1 includes a control device 50. The control device 50 controls the operation of the outdoor air-conditioning unit 20 and the opening state of each air outlet 30. The control device 50 obtains detection results of the presence or absence of a worker 2 in each work area 11 from the human presence sensor 11S. The control device 50 obtains detection results of the carbon dioxide concentration in the air IA1 in the living room 10 from the detection unit 40. The control device 50 controls the amount of outside air OA1 contained in the temperature-controlled air CA1 supplied from the outdoor air-conditioning unit 20 to the lower space 4 and the air volume of the temperature-controlled air CA1 blown out from each air outlet 30 according to the presence or absence of a worker 2 in each work area 11 and the carbon dioxide concentration in the living room 10.

[0027] [Air conditioning system configuration] 2, the control device 50 includes a control unit 51 and a storage unit 52. The control unit 51 includes a processor, such as a CPU or an MPU, that executes various processes using software. The control unit 51 controls the operation of each unit included in the control device 50, for example.

[0028] The control device 50 may include an operation unit such as a mouse, a keyboard, an operation button, a touch panel, etc., and a display unit such as a display. The control device 50 is configured to be able to communicate with the air conditioner 3, the human presence sensor 11S, the outdoor air conditioning unit 20, the air outlet 30, and the detection unit 40.

[0029] The control unit 51 controls the operation of the outdoor air conditioning unit 20 and each air outlet 30. For example, the control unit 51 controls the outdoor air conditioning unit 20 to adjust the temperature and humidity of the temperature-controlled air CA1 supplied by the outdoor air conditioning unit 20. For example, the control unit 51 controls the outdoor air conditioning unit 20 to adjust the air volume per unit time of the temperature-controlled air CA1 supplied by the outdoor air conditioning unit 20. For example, the control unit 51 controls the outdoor air conditioning unit 20 to adjust the ratio of the outdoor air OA1 and the return air RA1 in the temperature-controlled air CA1 supplied by the outdoor air conditioning unit 20, that is, the amount of the outdoor air OA1 contained in the temperature-controlled air CA1 blown out per unit time. The control unit 51 controls the opening ratio of each air outlet 30 to adjust the air volume of the temperature-controlled air CA1 blown out from each air outlet 30 per unit time. The control unit 51 may control the operation of the air conditioner 3.

[0030] The storage unit 52 includes a temporary memory and a non-volatile memory. The temporary memory temporarily stores data to be processed by the control device 50. The temporary memory is, for example, a RAM. The non-volatile memory is, for example, a flash memory, an HDD, or an SSD.

[0031] The non-volatile memory stores, for example, arrangement data that associates the arrangement of the work area 11 and non-work area 12 in the living room 10 with the arrangement of each air outlet 30. The arrangement data includes information on the arrangement of the individual air outlets 31 corresponding to each work area 11, and information on the arrangement of the outside air introduction air outlets 32 corresponding to the non-work area 12.

[0032] The non-volatile memory stores an air conditioning management program that enables the control unit 51 to control the operation of the outdoor air conditioning unit 20 and the air outlet 30. The control unit 51 executes the air conditioning management program to function as an outdoor air volume adjustment unit 51A and an air outlet volume adjustment unit 51B.

[0033] [Outside air volume adjustment section] The outdoor air amount adjustment unit 51A adjusts the amount of outdoor air OA1 contained in the temperature regulated air CA1 supplied from the outdoor air conditioning unit 20, depending on the carbon dioxide concentration in the air IA1 in the room 10 detected by the detection unit 40. In other words, the outdoor air amount adjustment unit 51A controls the outdoor air conditioning unit 20 so that the amount of outdoor air OA1 contained in the temperature regulated air CA1 supplied by the outdoor air conditioning unit 20 satisfies the amount of outdoor air OA1 required to be introduced into the room 10.

[0034] In detail, first, the outside air amount adjustment unit 51A determines the amount of outside air OA1 required to be introduced into the room 10 per unit time, according to the carbon dioxide concentration in the air IA1 in the room 10 detected by the detection unit 40.

[0035] For example, the higher the carbon dioxide concentration detected by the detection unit 40, the greater the amount of outside air OA1 required to be introduced into the room 10 per unit time. Conversely, the lower the carbon dioxide concentration detected by the detection unit 40, the smaller the amount of outside air OA1 required to be introduced into the room 10 per unit time.

[0036] Next, the outdoor air amount adjustment unit 51A calculates the sum of the air volumes of the temperature conditioned air CA1 blown out from the air outlets 30 per unit time. For example, the outdoor air amount adjustment unit 51A may calculate the sum of the air volumes of the temperature conditioned air CA1 blown out from the air outlets 30 per unit time from the opening ratio of each air outlet 30. For example, an air volume meter may be provided in each air outlet 30, and the outdoor air amount adjustment unit 51A may calculate the sum of the air volumes of the temperature conditioned air CA1 blown out from the air outlets 30 per unit time from the measurement results of the air volume meter corresponding to each air outlet 30. For example, a pressure meter may be provided in the lower space 4, and the outdoor air amount adjustment unit 51A may calculate the sum of the air volumes of the temperature conditioned air CA1 blown out from the air outlets 30 per unit time from the measurement results of the pressure meter provided in the lower space 4.

[0037] Next, the outdoor air volume adjustment unit 51A adjusts the amount of outdoor air OA1 contained in the temperature-controlled air CA1 supplied from the outdoor air conditioning unit 20 based on the volume of the temperature-controlled air CA1 blown out from the air outlet 30 so as to meet the amount of outdoor air OA1 required for introduction into the room 10.

[0038] That is, the outdoor air amount adjustment unit 51A controls the outdoor air conditioning unit 20 so that the higher the carbon dioxide concentration detected by the detection unit 40, the more outdoor air OA1 is contained in the temperature conditioned air CA1 supplied from the outdoor air conditioning unit 20. The outdoor air amount adjustment unit 51A controls the outdoor air conditioning unit 20 so that the lower the carbon dioxide concentration detected by the detection unit 40, the less outdoor air OA1 is contained in the temperature conditioned air CA1 supplied from the outdoor air conditioning unit 20. In this way, the outdoor air amount adjustment unit 51A adjusts the amount of outdoor air OA1 contained in the temperature conditioned air CA1 so that the amount of outdoor air OA1 introduced required in the room 10 is satisfied by the temperature conditioned air CA1 blown out from each air outlet 30.

[0039] The lower space 4 is kept at a predetermined pressure by the temperature-controlled air CA1 supplied from the outdoor air conditioning unit 20. That is, the outdoor air amount adjustment unit 51A adjusts the amount of outdoor air OA1 and the amount of return air RA1 contained in the temperature-controlled air CA1 supplied from the outdoor air conditioning unit 20 according to the carbon dioxide concentration in the living room 10 detected by the detection unit 40, thereby keeping the lower space 4 at a predetermined pressure. In other words, the outdoor air amount adjustment unit 51A adjusts the amount of return air RA1 contained in the temperature-controlled air CA1 according to the amount of outdoor air OA1 that increases or decreases depending on the carbon dioxide concentration in the living room 10. As a result, even if the amount of outdoor air OA1 contained in the temperature-controlled air CA1 is small, the amount of air of the temperature-controlled air CA1 blown out from the air outlet 30 is ensured.

[0040] [Blowout amount adjustment section] In the air conditioning system 1, when the amount of temperature-controlled air CA1 blown into the staying area 11A is small, the amount of outdoor air OA1 introduced by the temperature-controlled air CA1 blown into the staying area 11A alone may be insufficient. In this case, the blow-out amount adjustment unit 51B adjusts the air volume of each blow-out port 30 so that the sum of the amount of outdoor air OA1 contained in the temperature-controlled air CA1 blown out from each blow-out port 30 satisfies the amount of outdoor air OA1 introduced into the living room 10.

[0041] In detail, the blow-out amount adjustment unit 51B controls the air volume of the blow-out port 30 that blows out the temperature regulated air CA1 toward the non-stay area 13 where the worker 2 is not present in the room 10 so as to satisfy the amount of outside air OA1 required to be introduced into the room 10. That is, when the amount of outside air OA1 introduced is insufficient only with the temperature regulated air CA1 blown toward the stay area 11A, the blow-out amount adjustment unit 51B increases the amount of outside air OA1 introduced into the room 10 by blowing out the temperature regulated air CA1 toward the non-stay area 13.

[0042] The blowout amount adjustment unit 51B adjusts the amount of outside air OA1 introduced into the room 10 by any of the following control modes. In a first control mode, the blowout amount adjustment unit 51B controls the air volume of the individual blowout port 31 that blows out the temperature-regulated air CA1 toward an unmanned area 11B where the worker 2 is not present among the multiple work areas 11, so as to satisfy the amount of outside air OA1 introduced into the room 10. In a second control mode, the blowout amount adjustment unit 51B controls the air volume of the outside air introduction blowout port 32 that blows out the temperature-regulated air CA1 toward the non-work area 12, so as to satisfy the amount of outside air OA1 introduced into the room 10. In a third control mode, the blowout amount adjustment unit 51B controls both the air volume of the temperature-regulated air CA1 blown out into the unmanned area 11B and the air volume of the temperature-regulated air CA1 blown out into the non-work area 12, so as to satisfy the amount of outside air OA1 introduced into the room 10.

[0043] The blowout volume adjustment unit 51B distinguishes between the stay area 11A and the uninhabited area 11B based on the detection result of the human presence sensor 11S. As a result, the blowout volume adjustment unit 51B distinguishes between the individual blowout port 31 that blows out the temperature-controlled air CA1 toward the stay area 11A and the individual blowout port 31 that blows out the temperature-controlled air CA1 toward the uninhabited area 11B. The blowout volume adjustment unit 51B also distinguishes between the individual blowout port 31 and the outside air introduction blowout port 32 based on the arrangement data stored in the non-volatile memory.

[0044] [Operation of the embodiment] In the air conditioning system 1, temperature-controlled air CA1 including outside air OA1 is blown out from the air outlet 30 toward the work area 11, thereby performing personal air conditioning for the work area 11 and introducing the outside air OA1 into the living room 10. That is, in the air conditioning system 1, personal air conditioning for the work area 11 is performed using the outside air OA1 introduced into the living room 10 for ventilation.

[0045] In addition, in the air conditioning system 1, when the amount of outside air OA1 introduced is insufficient with only the temperature-controlled air CA1 blown toward the stay area 11A, the amount of outside air OA1 introduced is ensured by blowing the temperature-controlled air CA1 toward the non-stay area 13.

[0046] [Effects of the embodiment] According to the above embodiment, the following effects can be obtained. (1) In the air conditioning system 1, in addition to the temperature-controlled air CA1 blown into the stay area 11A as personal air conditioning, the amount of outside air OA1 introduced is ensured by blowing the temperature-controlled air CA1 toward the non-stay area 13. This makes it possible to ensure the necessary amount of outside air OA1 introduced regardless of the volume of the temperature-controlled air CA1 blown into the stay area 11A as personal air conditioning.

[0047] (2) In the air conditioning system 1, the amount of outside air OA1 contained in the temperature-controlled air CA1 supplied from the outdoor air conditioning unit 20 is adjusted according to the carbon dioxide concentration in the room 10 detected by the detection unit 40. In the air conditioning system 1, the greater the amount of outside air OA1 contained in the temperature-controlled air CA1, the greater the energy required for adjusting the temperature of the outside air OA1, and the lower the energy efficiency. Therefore, by adjusting the amount of outside air OA1 and the amount of return air RA1 contained in the temperature-controlled air CA1 supplied from the outdoor air conditioning unit 20 according to the carbon dioxide concentration in the room 10 detected by the detection unit 40, an excessive amount of outside air OA1 is prevented from being used for the temperature-controlled air CA1. This makes it possible to suppress a decrease in energy efficiency associated with an increase in the amount of outside air OA1 contained in the temperature-controlled air CA1 while ensuring the amount of outside air OA1 introduced when performing ventilation using the temperature-controlled air CA1 that performs personal air conditioning.

[0048] By adjusting the amount of return air RA1 contained in the temperature conditioned air CA1 according to the amount of outside air OA1 contained in the temperature conditioned air CA1, even if the amount of outside air OA1 contained in the temperature conditioned air CA1 is small, the volume of the temperature conditioned air CA1 blown out from the air outlet 30 can be ensured. Furthermore, when cooling the room 10 using the outside air OA1 when the outside temperature is low, the temperature of the temperature conditioned air CA1 may become too low to the point where it is uncomfortable for the worker 2. In such a case, the temperature of the temperature conditioned air CA1 can be raised by using return air RA1 in addition to the outside air OA1 as the temperature conditioned air CA1.

[0049] (3) By providing the individual air outlets 31 on the floor 10F of the room 10, the temperature-controlled air CA1 can be blown from closer to the worker 2 and the work area 11 than when the temperature-controlled air CA1 is blown from the ceiling 10C. This allows for effective personal air conditioning for the worker 2 with a smaller air volume. Also, fresh outside air OA1 can be efficiently supplied to the work area 11.

[0050] (4) As a first control form, the airflow adjustment unit 51B adjusts the airflow rate of the individual air outlets 31 that blow out the temperature-controlled air CA1 to the unoccupied area 11B so that the amount of outdoor air OA1 required to be introduced into the living space 10 is met. This ensures that the necessary amount of outdoor air OA1 is introduced even if the amount of outdoor air OA1 introduced is small in the temperature-controlled air CA1 blown out to the staying area 11A. Also, if the temperature-controlled air CA1 is blown out toward the unoccupied area 11B, the amount of outdoor air OA1 introduced can be ensured, for example, without providing an outdoor air introduction air outlet 32 ​​for blowing out the temperature-controlled air CA1 into the non-working area 12 in the living space 10.

[0051] (5) As a second control form, the blowout amount adjustment unit 51B adjusts the air volume of the outside air introduction outlet 32 ​​that blows out the temperature-controlled air CA1 to the non-working area 12 so that the amount of outside air OA1 required in the living room 10 is met. As a result, even if the amount of outside air OA1 introduced by the temperature-controlled air CA1 blown out to the staying area 11A is small, the necessary amount of outside air OA1 can be ensured by the temperature-controlled air CA1 blown out from the outside air introduction outlet 32. In addition, when the usage rate (occupancy rate) of the working area 11 is high and the unmanned area 11B is small, the amount of outside air OA1 introduced may be insufficient only by the temperature-controlled air CA1 blown out to the staying area 11A and the unmanned area 11B. In this regard, if the temperature-controlled air CA1 is blown out to the non-working area 12, the amount of outside air OA1 required in the living room 10 can be more reliably ensured, regardless of the usage rate of the working area 11.

[0052] (6) As a third control mode, the blow-out volume adjustment unit 51B controls both the volume of the temperature-controlled air CA1 blown into the unoccupied area 11B and the volume of the temperature-controlled air CA1 blown into the non-working area 12 so as to satisfy the amount of outside air OA1 required to be introduced into the living room 10. This allows a larger amount of temperature-controlled air CA1 to be blown out toward the non-stay area 13 compared to the first control mode and the second control mode. This makes it possible to more reliably ensure the amount of outside air OA1 required to be introduced into the living room 10.

[0053] (7) Since the air conditioning system 1 is equipped with a human presence sensor 11S, it can automatically identify whether each work area 11 is in a stay area 11A where a worker 2 is staying or an unmanned area 11B where no worker 2 is staying.

[0054] [Example of change] The above embodiment can be modified as follows. The modifications can be combined as appropriate within the scope of the present invention.

[0055] The airflow rate adjustment unit 51B may ensure the amount of outside air OA1 required for introduction into the room 10 by adjusting the airflow rate of the individual air outlets 31 that blow out the temperature-controlled air CA1 to the unoccupied area 11B among the multiple individual air outlets 31, without controlling the airflow rate of the outside air introduction outlet 32. In this case, the air conditioning system 1 may be configured to include only the multiple individual air outlets 31, without including the outside air introduction outlet 32 ​​as the multiple air outlets 30.

[0056] The blowout amount adjustment unit 51B may ensure the introduction amount of outside air OA1 required in the room 10 by adjusting the air volume of the outside air introduction outlet 32 ​​without controlling the air volume of the individual air outlet 31 that blows out the temperature regulated air CA1 to the unoccupied area 11B among the multiple individual air outlets 31. In this case, the blowout amount adjustment unit 51B does not need to distinguish between the individual air outlet 31 that blows out the temperature regulated air CA1 toward the stay area 11A and the individual air outlet 31 that blows out the temperature regulated air CA1 toward the unoccupied area 11B. In addition, since it is sufficient that the blowout amount adjustment unit 51B can control at least the outside air introduction outlet 32, for example, if the blowout amount adjustment unit 51B is configured to control only the outside air introduction outlet 32 ​​in advance, it is not necessary to distinguish between the individual air outlet 31 and the outside air introduction outlet 32.

[0057] When the amount of outside air OA1 required for introduction into the living space 10 can be ensured by the temperature-controlled air CA1 blown out from the staying area 11A, the blowout amount adjustment unit 51B may close the individual blowout port 31 that blows out the temperature-controlled air CA1 into the unoccupied area 11B. This reduces the total amount of temperature-controlled air CA1 blown out into the living space 10, thereby reducing the load on the outdoor air-conditioning unit 20 and thereby improving the energy efficiency of the air-conditioning system 1.

[0058] The human sensor 11S may be omitted. In this case, for example, instead of the human sensor 11S, the presence or absence of the worker 2 in the work area 11 may be detected by detecting the usage status (power ON or OFF) of electronic devices such as a personal computer or personal lighting arranged in each work area 11. In this case, the electronic devices arranged in each work area 11 function as a detection unit. Note that if the presence or absence of the worker 2 is detected based only on the usage status of the electronic devices, it is possible that the presence or absence of the worker 2 may be erroneously recognized as unoccupied if the worker 2 is present but not using the electronic devices. In this regard, when the human sensor 11S is used, the above-mentioned erroneous recognition can be prevented, and therefore the presence or absence of the worker 2 in each work area 11 can be detected with higher accuracy.

[0059] [Note] According to the above embodiment and its modifications, the following technical ideas can be derived. (Appendix 1) An air conditioning system that individually conditions multiple work areas in a room where a worker works, An outdoor air conditioning unit that supplies temperature-controlled air by adjusting the temperature of air including outside air taken in from outside; A detection unit that detects whether the worker is present in each work area; A plurality of air outlets are arranged on a floor of the living room and blow out the temperature-controlled air into the living room; A detection unit for detecting a carbon dioxide concentration in the living room; an outdoor air amount adjustment unit that adjusts the amount of the outdoor air contained in the temperature-controlled air supplied from the outdoor air conditioner in accordance with the carbon dioxide concentration; and a blowout volume adjustment unit that distinguishes between a first blowout port that individually blows the temperature-controlled air into a stay area among the plurality of work areas where the worker is staying and a second blowout port that individually blows the temperature-controlled air into an uninhabited area among the plurality of work areas where the worker is not staying, and adjusts the volume of the temperature-controlled air blown out from the second blowout port so that a sum of the amount of outside air contained in the temperature-controlled air blown out from the first blowout port and the second blowout port per unit time satisfies an introduction amount of the outside air per unit time required in the living room. Air conditioning system.

[0060] According to the above supplementary note 1, even if the amount of outside air introduced is small in the temperature-controlled air blown into the occupied area, which is a manned work area where a worker is present, the necessary amount of outside air can be ensured by the temperature-controlled air blown into the unmanned area where no worker is present. This ensures the necessary amount of outside air to be introduced without changing the volume of the temperature-controlled air blown into the occupied area as personal air conditioning. In addition, the detection unit can automatically identify whether or not a worker is present in each work area. [Explanation of symbols]

[0061] CA1...temperature-controlled air, IA1...air, OA1...outdoor air, RA1...return air, 1...air conditioning system, 2...worker, 3...air conditioner, 3A...indoor unit, 4...lower space, 5...ventilation opening, 6...upper space, 10...living room, 10C...ceiling, 10F...floor, 10W...wall, 11...work area, 11A...stay area, 11B...unmanned area, 12...non-work area, 13...non-stay area, 20...outdoor air conditioning unit, 30...air outlet, 30A...first air outlet, 30B...second air outlet, 30C...third air outlet, 31...individual air outlet, 32...air outlet for introducing outdoor air, 40...detection unit, 50...control device, 51...control unit, 51A...outdoor air volume adjustment unit, 51B...blow volume adjustment unit, 52...memory unit.

Claims

1. An air conditioning system that individually conditions multiple work areas in a room where a worker works, An outdoor air conditioning unit that supplies temperature-controlled air by adjusting the temperature of air including outside air taken in from outside; a plurality of air outlets arranged on a floor of the room, the plurality of air outlets including an air outlet that blows the temperature-controlled air to a stay area among the plurality of work areas where the worker is staying at an air volume that can be individually adjusted by the worker, and an air outlet that blows the temperature-controlled air to a non-stay area in the room where the worker is not staying; A detection unit for detecting a carbon dioxide concentration in the living room; an outdoor air amount adjustment unit that adjusts the amount of the outdoor air contained in the temperature-controlled air supplied from the outdoor air conditioner in accordance with the carbon dioxide concentration; and a blowout volume adjustment unit that adjusts the volume of the temperature-controlled air blown out from the blowout ports that blow out the temperature-controlled air into the non-stay area so that the sum of the amounts of outside air contained in the temperature-controlled air blown out from the plurality of blowout ports per unit time satisfies the amount of outside air introduced per unit time required in the room. Air conditioning system.

2. The non-stay area includes an unmanned area among the plurality of work areas where the worker is not staying, The blowout volume adjustment unit adjusts the volume of the temperature-controlled air blown out from a blowout port through which the temperature-controlled air is blown out to the unoccupied area.

2. The air conditioning system of claim 1.

3. The non-stay area is an area in the room that is not used as the plurality of work areas, and includes a non-work area where the worker does not perform work, The airflow volume adjustment unit adjusts the volume of the temperature-controlled air blown out from an air outlet through which the temperature-controlled air is blown out toward the non-work area.

3. An air conditioning system according to claim 1 or 2.

Images