Air conditioning system

Abstract

To provide an air conditioning system including an air conditioner and a ventilator for making a user recognize that the ventilator operates.SOLUTION: An air conditioning system includes an air conditioner 11, a ventilator 31, a sensor 21 for detecting the concentration of carbon dioxide in a living room to be air-conditioned by the air conditioner 11 and the ventilator 31, a display device 26 for displaying ventilation information about the operation of the ventilator 31, and control devices 15, 25 for controlling the ventilator 31 and the display device 26. The control device 15, 25 allows the operation of the ventilator 31 at the same time or after allowing the display of ventilation information on the display device 26, on the basis of the detection result of the sensor 21.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Patent Document 1 below discloses an air conditioning control system that operates an indoor air conditioner and a ventilation device in conjunction with each other. This air conditioning control system is configured to detect the surface temperature of a person present in an indoor air-conditioned space and the indoor carbon dioxide concentration, and adjust the indoor temperature and control the ventilation device based on these values. Specifically, when the indoor carbon dioxide concentration exceeds a desired threshold during cooling operation, the air conditioning control system increases the cooling capacity and controls the ventilation device as necessary to ventilate the room. When the indoor carbon dioxide concentration exceeds a desired threshold during heating operation, the air conditioning control system decreases the heating capacity and controls the ventilation device as necessary to ventilate the room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-137212 Summary of the Invention [Problem to be solved by the invention]

[0004] When a ventilation device is controlled in accordance with the carbon dioxide concentration in a room, as in the air conditioning control system described in Patent Document 1, the user may not be aware that the ventilation device is operating.

[0005] The present disclosure aims to make a user aware that the ventilation device is operating in an air conditioning system including an air conditioner and a ventilation device. [Means for solving the problem]

[0006] (1) The air conditioning system of the present disclosure is Air conditioners and Ventilation equipment, a sensor for detecting a carbon dioxide concentration in a room that is an air conditioning target of the air conditioner and the ventilation device; a display device that displays ventilation information related to the operation of the ventilation device; a control device that controls the ventilation device and the display device, The control device operates the ventilation device simultaneously with or after displaying the ventilation information on the display device based on the detection result of the sensor.

[0007] According to the above configuration, the control device operates the ventilation device at the same time as or after displaying the ventilation information on the display device, so that the ventilation information is always displayed on the display device when the ventilation device is activated, and the user can recognize that the ventilation device is operating by looking at the display.

[0008] (2) The air conditioning system of (1) above preferably further includes a remote controller communicatively connected to the air conditioner and having the display device, the control device includes a control unit provided in the remote controller, The control unit acquires the detection results of the sensors and uses the detection results to determine whether or not it is necessary to display the ventilation information and operate the ventilation device.

[0009] According to the above configuration, the control unit of the remote controller determines whether or not ventilation information needs to be displayed and whether or not the ventilation device needs to be operated, and depending on the results, ventilation information can be quickly displayed on the display device of the remote controller, and the ventilation device can be operated simultaneously with or after this display.

[0010] (3) The air conditioning system of (1) above preferably further includes a remote controller communicatively connected to the air conditioner, the control device includes a control unit provided in the remote controller, The control unit acquires the detection result of the sensor and determines whether or not the detection result exceeds a predetermined threshold value, and whether or not the ventilation information needs to be displayed and the ventilation device needs to be operated; The control unit has a memory that stores the threshold value.

[0011] According to the above configuration, the control unit of the remote controller can use the threshold value stored in the memory to display ventilation information and determine whether or not the ventilation device needs to be operated.

[0012] (4) In the air conditioning system of (3), preferably, the remote controller includes an input unit that receives input of the threshold value, The control unit stores the input threshold value in the memory.

[0013] According to the above configuration, the threshold value can be easily set in accordance with the user's request or the like.

[0014] (5) In the air conditioning system of (1) above, preferably, the control device includes a control unit provided in the air conditioner, The control unit acquires the detection result of the sensor and determines whether or not it is necessary to display the ventilation information and operate the ventilation device using the detection result, When the control unit determines that it is necessary to display the ventilation information and to operate the ventilation device, it instructs the display device to display the ventilation information, and then operates the ventilation device.

[0015] According to the above configuration, the control unit of the air conditioner determines whether it is necessary to display ventilation information and operate the ventilation device, and if it determines that these are necessary, it instructs the display device to display the ventilation information and then operates the ventilation device, so that the ventilation device can be operated after the ventilation information is displayed on the display device.

[0016] (6) The air conditioning system of (5) above preferably further comprises a remote controller communicatively connected to the air conditioner and having the display device.

[0017] (7) In the air conditioning system described in any one of (1) to (6) above, preferably, when the control device determines that it is unnecessary to display the ventilation information and operate the ventilation device while the ventilation device is operating, it hides the ventilation information displayed on the display device and continues to operate the ventilation device until a certain time has passed since its operation.

[0018] With this configuration, when the carbon dioxide concentration drops while the ventilation device is operating and further ventilation is no longer necessary, the control device hides the ventilation information that was displayed on the display device. Meanwhile, even if the carbon dioxide concentration drops, the control device does not immediately stop the ventilation device, but continues to operate the ventilation device until a predetermined time has passed. This makes it possible to suppress the phenomenon of the ventilation device frequently repeating activation and deactivation (hunting). [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic configuration diagram of an air conditioning system according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a block diagram of an air conditioning system. [Figure 3] FIG. 2 is a front view of the remote controller. [Figure 4A] 10 is a flowchart showing a processing procedure in the control unit of the indoor unit in the linked control mode. [Figure 4B] 10 is a flowchart showing a processing procedure in a linked control mode in a control unit of the remote controller. [Figure 5] FIG. 4 is a schematic configuration diagram of an air conditioning system according to a second embodiment of the present disclosure. [Figure 6] FIG. 2 is a block diagram of an air conditioning system. [Figure 7A] 10 is a flowchart showing a processing procedure in the control unit of the indoor unit in the linked control mode. [Figure 7B] 10 is a flowchart showing a processing procedure in a linked control mode in a control unit of the remote controller. [Figure 8]FIG. 10 is a schematic configuration diagram of an air conditioning system according to a third embodiment of the present disclosure. [Figure 9A] 10 is a flowchart showing a processing procedure in the control unit of the indoor unit in the linked control mode. [Figure 9B] 10 is a flowchart showing a processing procedure in a linked control mode in a control unit of the remote controller. DETAILED DESCRIPTION OF THE INVENTION

[0020] [First embodiment] Fig. 1 is a schematic configuration diagram of an air conditioning system according to a first embodiment of the present disclosure, and Fig. 2 is a block diagram of the air conditioning system. 1, the air conditioning system 10 includes an air conditioner 11 and a ventilation device 31. The air conditioner 11 and the ventilation device 31 air-condition the interior of a room S1 (indoor space) of a building B.

[0021] [Air conditioner] The air conditioner 11 performs air conditioning, including cooling and heating, in a room S1 in a building B by operating a vapor compression refrigeration cycle. The air conditioner 11 includes an indoor unit 12 and an outdoor unit 13. The indoor unit 12 is installed inside (indoors) the building B. The outdoor unit 13 is installed outside (outdoors) S2 of the building B. The indoor unit 12 and the outdoor unit 13 are connected by a refrigerant pipe 14. The air conditioner 11 has a refrigerant circuit formed by connecting the indoor unit 12 and the outdoor unit 13 by the refrigerant pipe 14. In the example shown in FIG. 1, one indoor unit 12 is connected to one outdoor unit 13. However, multiple indoor units 12 may be connected to one outdoor unit 13.

[0022] The indoor unit 12 is installed in the attic space S2 of the living room (room) S1. The indoor unit 12 has a decorative panel 12a that is placed exposed inside the living room S1 along the underside of the ceiling, draws in indoor air through an intake port formed in the decorative panel 12a, and blows out temperature-controlled air into the room through an outlet port. The indoor unit 12 may be installed on the wall or floor of the living room S1. The indoor unit 12 may also be placed entirely in the attic space S2.

[0023] The indoor unit 12 has a control unit 15. The control unit 15 of the indoor unit 12 controls the operation of the indoor unit 12 and performs air conditioning such as cooling and heating. The control unit 15 of this embodiment can also control the operation of the ventilation device 31. As shown in FIG. 2, the control unit 15 includes a processor 15a, a memory 15b, and a switch 15c.

[0024] The processor 15a is, for example, a CPU (Central Processing Unit). However, the processor 15a is not limited to a CPU. The processor 15a may be a GPU (Graphics Processing Unit). The processor 15a may be an ASIC (Application Specific Integrated Circuit) or a programmable logic device such as a gate array or FPGA (Field Programmable Gate Array). The ASIC or programmable logic device is configured to be able to execute the same processing as the control program.

[0025] The memory 15b includes volatile memory such as SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory), and non-volatile memory such as flash memory, a hard disk, and ROM (Read Only Memory). The non-volatile memory stores control programs, which are computer programs, and control data. The indoor unit 12 performs various functions by having the processor 15a execute the control programs.

[0026] The switch 15c is used to control the operation of the ventilation device 31 in accordance with the carbon dioxide concentration in the room S1 by executing an interlocking control mode, which will be described later. The switch 15c is configured, for example, by a relay that turns on and off a power supply circuit to the ventilation device 31. The processor 15a can operate the switch 15c to start or stop the ventilation device 31.

[0027] A carbon dioxide concentration sensor 21 (hereinafter also simply referred to as "sensor") is connected to the control section 15 of the indoor unit 12. A remote controller 22 is also connected to the control section 15 of the indoor unit 12.

[0028] [Sensor] The sensor 21 is provided in the indoor unit 12 and detects the carbon dioxide concentration in the living room S1. The sensor 21 is connected to the control unit 15 of the indoor unit 12 so that it can communicate with the control unit 15 via wired or wireless communication. The carbon dioxide concentration detected by the sensor 21 is transmitted to the control unit 15 of the indoor unit 12. The control unit 15 of the indoor unit 12 transmits the received carbon dioxide concentration detection value to the control unit 25 of the remote controller 22, which will be described later. The location where the sensor 21 is installed is not limited to the indoor unit 12, and may be any location where the carbon dioxide concentration in the living room S1 can be detected. For example, the sensor 21 may be installed on the ceiling or wall of the living room.

[0029] [Remote Controller] The remote controller 22 is communicably connected to the indoor unit 12 by wire or wirelessly. The remote controller 22 includes a control unit 25, a display unit 26, and an operation unit (input unit) 27.

[0030] The control unit 25 of the remote controller 22 has substantially the same configuration as the control unit 15 of the indoor unit 12. Specifically, the control unit 25 of the remote controller 22 includes a processor 25a and a memory 25b. The processor 25a is, for example, a CPU. However, the processor 25a is not limited to a CPU. The processor 25a may also be a GPU. The processor 25a may also be an ASIC, or a programmable logic device such as a gate array or FPGA. In this case, the ASIC or programmable logic device is configured to be able to execute the same processing as the control program.

[0031] The memory 25b includes volatile memory such as SRAM and DRAM, and non-volatile memory such as flash memory, hard disk, and ROM. The non-volatile memory stores control programs, which are computer programs, and control data. The various functions of the indoor unit 12 are realized by the processor 25a executing the control programs. The memory 25b of this embodiment stores a carbon dioxide concentration threshold value used for interlocking control of the ventilation device 31.

[0032] FIG. 3 is a front view of the remote controller. The display unit 26 of the remote controller 22 is configured with, for example, a liquid crystal panel. The display unit 26 may be configured with other devices such as an organic EL (Electro Luminescence) panel. The display unit 26 displays the operation mode, such as "cooling" or "heating," and the set temperature. Furthermore, the display unit 26 of this embodiment displays the indoor carbon dioxide concentration. Furthermore, when the linked control mode, which will be described later, is being executed, the display unit 26 displays information regarding the operation of the ventilation device 31 (hereinafter also referred to as "ventilation information"). In this embodiment, when ventilation in the living room S1 is recommended and the ventilation device 31 is actually operating, the display unit 26 displays the words "Ventilation Recommended." However, the display is not limited to this, and other words, such as "Ventilation Operation in Progress," may also be displayed. Instead of displaying words, a graphic representing ventilation may be displayed.

[0033] The carbon dioxide concentration display area and the ventilation information display area are shared, and when the ventilation device 31 is operating in the linked control mode, the carbon dioxide concentration and the ventilation information are displayed alternately at predetermined intervals. For example, the carbon dioxide concentration and the ventilation information are displayed alternately every two seconds. However, the display time for each item is not limited and can be changed as appropriate. On the display unit 26, the carbon dioxide concentration and the ventilation information may be displayed separately in different display areas.

[0034] The operation unit 27 of the remote controller 22 includes button switches 28 and 29. The button switches 28 and 29 are push-type switches that the user presses to operate them. The operation unit 27 accepts various inputs through the user's operation of one or more of the button switches 28 and 29. For example, the operation unit 27 accepts inputs to turn the air conditioner 11 on and off, and inputs of various settings such as the set temperature and air volume. As will be described in detail later, the operation unit 27 of this embodiment accepts inputs to turn the interlocking control mode of the ventilation device 31 on and off. Furthermore, the operation unit 27 accepts inputs of a "threshold value" of the carbon dioxide concentration used to determine whether or not the ventilation device 31 needs to be operated. The input "threshold value" is stored in the memory 25b.

[0035] The control unit 25 of the remote controller 22 transmits instructions corresponding to inputs to the operation unit 27 to the control unit 15 of the indoor unit 12. The control unit 15 of the indoor unit 12 controls the operation of the indoor unit 12 in accordance with the received instructions. The control unit 15 of the present embodiment also controls the operation of the ventilation device 31 in accordance with the received instructions.

[0036] [Ventilation equipment] The ventilation device 31 ventilates the air in the living room S1. As shown in FIG. 1 , the ventilation device 31 of this embodiment has a fan 32. The fan 32 has a fan rotor (impeller) 32a and a motor 32b that rotates and drives the fan rotor 32a. The fan rotor 32a has multiple blades, such as a propeller type or a sirocco type. The ventilation device 31 is a type 3 ventilation device that exhausts air to the outside of the living room S1 using the fan 32 and relies on natural ventilation to supply air into the living room S1. However, the ventilation device 31 may also be a type 1 ventilation device that uses a fan to both supply air into the room and exhaust air to the outside. The ventilation device 31 may also be a type 2 ventilation device that supplies air into the room using a fan and relies on natural ventilation to exhaust air to the outside.

[0037] [Interlocking control] The air conditioning system 10 of this embodiment has an interlocking control mode in which the ventilation device 31 is operated in conjunction with the operation of the air conditioner 11. The interlocking control mode is a control mode in which the ventilation device 31 is operated when the carbon dioxide concentration in the living room S1 is higher than a predetermined threshold, and ventilation in the living room S1 is automatically (forcibly) performed. A setting as to whether or not to execute this interlocking control mode can be input from the operation unit 27 of the remote controller 22, for example.

[0038] Fig. 4A is a flowchart showing the processing procedure in the control unit of the indoor unit in the interlocking control mode. Fig. 4B is a flowchart showing the processing procedure in the control unit of the remote controller in the interlocking control mode. The processing procedure of the control units 15, 25 in the interlocking control mode will be described below with reference to Figs. 4A and 4B.

[0039] 4A, in step S11, the control unit 15 of the indoor unit 12 acquires the detected value of the carbon dioxide concentration from the sensor 21. Next, in step S12, the control unit 15 of the indoor unit 12 transmits the acquired detected value of the carbon dioxide concentration to the control unit 25 of the remote controller 22. The control unit 15 of the indoor unit 12 periodically transmits the detected value of the carbon dioxide concentration. For example, the control unit 15 transmits the detected value every five minutes.

[0040] 4B, in step S21, the control unit 25 of the remote controller 22 determines whether or not a detected value of the carbon dioxide concentration has been received from the control unit 15 of the indoor unit 12. If the control unit 25 determines that a detected value of the carbon dioxide concentration has been received, the process proceeds to step S22, but if the control unit 25 determines that a detected value of the carbon dioxide concentration has not been received, the process returns to step S21. In step S22, the control unit 25 causes the display unit 26 to display the received detected value.

[0041] Furthermore, in step S23, the control unit 25 of the remote controller 22 determines whether or not the interlocking control mode is being executed. If the control unit 25 determines that the interlocking control mode is being executed, the process proceeds to step S24, and if the control unit 25 determines that the interlocking control mode is not being executed, the process returns to step S21. Therefore, if the interlocking control mode is not being executed, the carbon dioxide concentration is simply displayed on the display unit 26 of the remote controller 22.

[0042] In step S24, control unit 25 determines whether the received detected value of carbon dioxide concentration is greater than a predetermined threshold. If control unit 25 determines that the detected value of carbon dioxide concentration is greater than the threshold, it proceeds to step S25, and if it determines that the detected value is equal to or less than the threshold, it proceeds to step S27. This threshold is the maximum carbon dioxide concentration at which ventilation of room S1 becomes unnecessary.

[0043] In step S25, the control unit 25 of the remote controller 22 causes the display unit 26 to display the words "Ventilation Recommended" as ventilation information, which is information related to the operation of the ventilation device 31, and proceeds to step S26. In step S26, the control unit 25 transmits an instruction to operate the ventilation device 31 to the control unit 15 of the indoor unit 12, and then returns the process to step S21.

[0044] On the other hand, in step S27, the control unit 25 of the remote controller 22 hides the ventilation information "Ventilation Recommended" on the display unit 26. That is, if ventilation information is displayed on the display unit 26, the display is erased, and if no ventilation information is being generated, the display is maintained. The control unit 25 then returns the process to step S21. The control unit 25 of the remote controller 22 repeatedly executes the above process while the operation of the air conditioner 11 is on, and ends the process when the operation of the indoor unit 12 is turned off.

[0045] 4A, in step S13, the control unit 15 of the indoor unit 12 determines whether or not it has received a signal instructing the operation of the ventilation device 31 (the signal transmitted in step S26 of FIG. 4B) from the control unit 25 of the remote controller 22. If the control unit 15 of the indoor unit 12 determines that it has received a signal instructing the operation of the ventilation device 31, it proceeds to step S14, and if it determines that it has not received the signal, it proceeds to step S15.

[0046] In step S14, the control unit 15 of the indoor unit 12 activates the ventilation device 31. Specifically, the control unit 15 controls the switch 15c shown in Fig. 2 to turn on the power supply circuit to the ventilation device 31. This causes the ventilation device 31 to operate automatically and forcibly, thereby reducing the carbon dioxide concentration in the living room S1.

[0047] In step S15, the control unit 15 of the indoor unit 12 determines whether the ventilation device 31 is operating. If the control unit 15 determines that the ventilation device 31 is operating, the process proceeds to step S16, and if the control unit 15 determines that the ventilation device 31 is not operating, the process returns to step S11.

[0048] In step S16, the control unit 15 of the indoor unit 12 determines whether a predetermined time has elapsed since the ventilation device 31 was activated. This predetermined time is set to a time that can reliably reduce the carbon dioxide concentration in the living room S1 to below the threshold, and may be, for example, two hours. If the control unit 15 determines that the predetermined time has elapsed, it proceeds to step S17; if it determines that the predetermined time has not elapsed, it returns to step S11.

[0049] In step S17, the control unit 15 of the indoor unit 12 stops the ventilation device 31. The control unit 15 of the indoor unit 12 repeatedly executes the above procedure while the operation of the indoor unit 12 is on, and ends the processing when the operation of the indoor unit 12 is turned off.

[0050] 4A, if the ventilation device 31 is operated by the process of step S14, and then, if it is determined in step S13 that an operation instruction for the ventilation device 31 is not received again, the control unit 15 of the indoor unit 12 does not immediately stop the ventilation device 31, but stops the ventilation device 31 after a predetermined time has passed (steps S16 and S17). Therefore, even if the carbon dioxide concentration fluctuates above and below a predetermined threshold, it is possible to suppress the hunting phenomenon in which the ventilation device 31 frequently starts and stops repeatedly.

[0051] In step S25 of FIG. 4B , the control unit 25 of the remote controller 22 displays the words "Ventilation Recommended" on the display unit 26, and then transmits an instruction to operate the ventilation device 31 to the control unit 15 of the indoor unit 12. Therefore, when the ventilation device 31 is operated by the control unit 15 of the indoor unit 12, the words "Ventilation Recommended" are already displayed on the display unit 26 of the remote controller 22. Therefore, the user can recognize that the ventilation device 31 is operating by looking at the display unit 26. Furthermore, the user can recognize that the carbon dioxide concentration in the living room S1 is high by looking at the carbon dioxide concentration displayed on the display unit 26, and can thereby recognize that the ventilation device 31 is operating and the reason for its operation.

[0052] The timing for displaying the ventilation information on the display unit 26 and the timing for operating the ventilation device 31 may be simultaneous. In this case, the order or time interval between the processing of step S25 and the processing of step S26 may be adjusted so that the two timings are simultaneous.

[0053] Although the control unit 25 of the remote controller 22 determines whether the interlocked control mode is being executed in step S23 of FIG. 4B, this determination may be made by the control unit 15 of the indoor unit 12. For example, after performing the process of step S22 of FIG. 4B, the control unit 25 of the remote controller 22 can perform the processes of steps S24 and S25, and then transmit an operation instruction for the ventilation device 31 to the control unit 15 of the indoor unit 12 in step S26. When the control unit 15 of the indoor unit 12 receives the operation instruction for the ventilation device 31 in step S13 of FIG. 4A, it determines whether the interlocked control mode is being executed, and if it determines that the interlocked control mode is being executed, it can operate the ventilation device 31 in step S14. In this case, if the carbon dioxide concentration is higher than the threshold, the display unit 26 of the remote controller 22 will display the words "Ventilation Recommended" even if the ventilation device 31 is not operating (even if the interlocked control mode is not being executed), thereby urging the user to manually operate the ventilation device 31 or open a window for ventilation.

[0054] [Second embodiment] Fig. 5 is a schematic configuration diagram of an air conditioning system according to a second embodiment of the present disclosure, and Fig. 6 is a block diagram of the air conditioning system. As described above, in the air conditioning system 10 of the first embodiment, the sensor 21 was connected to the control unit 15 of the indoor unit 12. In the air conditioning system 10 of the second embodiment, the sensor 21 is connected to the control unit 25 of the remote controller 22. More specifically, the sensor 21 is provided in the remote controller 22. Therefore, in this embodiment, it is not necessary to transmit the detected value of the carbon dioxide concentration from the control unit 15 of the indoor unit 12 to the control unit 25 of the remote controller 22, and an instruction to operate the ventilation device 31 is transmitted from the control unit 25 of the remote controller 22 to the control unit 15 of the indoor unit 12.

[0055] Fig. 7A is a flowchart showing the processing procedure in the control section of the indoor unit in the linked control mode, and Fig. 7B is a flowchart showing the processing procedure in the control section of the remote controller in the linked control mode. In Fig. 7A, the control unit 15 of the indoor unit 12 omits steps S11 and S12 from the processing described in Fig. 4A, but otherwise executes the same processing. On the other hand, in Fig. 7B, the control unit 25 of the remote controller 22 executes processing of step S21' to acquire a detected value of carbon dioxide concentration from the sensor 21, instead of the processing of step S21 described in Fig. 4B. The other processing of steps S22 to S26 is the same as in the first embodiment. Therefore, detailed description of the processing procedures of each control unit 15, 25 will be omitted.

[0056] [Third embodiment] FIG. 8 is a schematic configuration diagram of an air conditioning system according to the third embodiment of the present disclosure. As described above, in the air conditioning system 10 of the first embodiment, the control unit 25 of the remote controller 22 determines whether or not to display ventilation information and whether or not to operate the ventilation device 31 based on the detected value of the carbon dioxide concentration. In the air conditioning system 10 of the third embodiment, these determinations are made by the control unit 15 of the indoor unit 12. The configurations of the indoor unit 12, ventilation device 31, remote controller 22, and sensor 21 in the air conditioning system 10 are the same as those of the first embodiment shown in FIG. 1.

[0057] Fig. 9A is a flowchart showing the processing procedure in the control section of the indoor unit in the linked control mode, and Fig. 9B is a flowchart showing the processing procedure in the control section of the remote controller in the linked control mode.

[0058] 9A, in step S31, the control unit 15 of the indoor unit 12 acquires the detected value of the carbon dioxide concentration from the sensor 21. Next, in step S32, the control unit 15 of the indoor unit 12 transmits the acquired detected value of the carbon dioxide concentration to the control unit 25 of the remote controller 22.

[0059] 9B, in step S51, the control unit 25 of the remote controller 22 determines whether or not a detected value of the carbon dioxide concentration has been received from the control unit 15 of the indoor unit 12. If the control unit 25 determines that a detected value of the carbon dioxide concentration has been received, the process proceeds to step S52, but if the control unit 25 determines that a detected value of the carbon dioxide concentration has not been received, the process returns to step S51. In step S52, the control unit 25 causes the display unit 26 to display the received detected value.

[0060] 9A, the control unit 15 of the indoor unit 12 determines whether or not the interlocking control mode is being executed in step S33. If the control unit 15 determines that the interlocking control mode is being executed, the process proceeds to step S34, and if the control unit 15 determines that the interlocking control mode is not being executed, the process returns to step S31.

[0061] In step S34, control unit 15 determines whether the acquired detected value of carbon dioxide concentration is greater than a predetermined threshold. If control unit 15 determines that the detected value of carbon dioxide concentration is greater than the threshold, control unit 15 proceeds to step S35. If control unit 15 determines that the detected value is equal to or less than the threshold, control unit 15 proceeds to step S38. This threshold is stored in memory 15b of control unit 15.

[0062] In step S35, the control unit 15 of the indoor unit 12 sends an instruction to the control unit 25 of the remote controller 22 to display the words "Ventilation Recommended" on the display unit 26 as ventilation information, and the process proceeds to step S36. In step S36, the control unit 15 determines whether a predetermined waiting time has elapsed, and if it determines that the time has elapsed, the process proceeds to step S37. In step S37, the control unit 15 activates the ventilation device 31, and then returns the process to step S31.

[0063] On the other hand, in step S38, the control unit 15 of the indoor unit 12 sends an instruction to the control unit 25 of the remote controller 22 to hide the ventilation information "Ventilation Recommended" on the display unit 26 of the remote controller 22. Thereafter, in step S39, the control unit 15 of the indoor unit 12 determines whether the ventilation device 31 is operating. If the control unit 15 determines that the ventilation device 31 is operating, the process proceeds to step S40; if the control unit 15 determines that the ventilation device 31 is not operating, the process returns to step S31.

[0064] In step S40, the control unit 15 of the indoor unit 12 determines whether a predetermined time has elapsed since the ventilation device 31 was activated. This predetermined time is the time required to reliably reduce the carbon dioxide concentration in the living room S1 to below the threshold, and is set to, for example, two hours. If the control unit 15 determines that the predetermined time has elapsed, it proceeds to step S41; if it determines that the predetermined time has not elapsed, it returns to step S31.

[0065] In step S41, the control unit 15 of the indoor unit 12 stops the ventilation device 31. The control unit 15 of the indoor unit 12 repeatedly executes the above procedure while the operation of the indoor unit 12 is on, and ends the processing when the operation of the indoor unit 12 is turned off.

[0066] The control unit 25 of the remote controller 22 determines whether or not it has received a signal instructing the display of ventilation information (the signal transmitted in step S35 of FIG. 9A) from the control unit 15 of the indoor unit 12. If the control unit 25 of the remote controller 22 has received a signal instructing the display of ventilation information, it proceeds to step S54, and if it has not received the signal, in other words, if it has received a signal instructing the non-display of ventilation information, it proceeds to step S55.

[0067] In step S54, the control unit 25 of the remote controller 22 causes the display unit 26 to display the words "Ventilation Recommended", which are ventilation information. In step S55, the control unit 25 of the remote controller 22 hides the words "Ventilation Recommended", which are ventilation information, on the display unit 26. In other words, if ventilation information is displayed on the display unit 26, the display is erased, and if no ventilation information is being generated, the state is maintained. The control unit 25 then returns the process to step S51. The control unit 25 of the remote controller 22 repeatedly executes the above process while the operation of the air conditioner 11 is on, and ends the process when the operation of the indoor unit 12 is turned off.

[0068] In the third embodiment, the control unit 15 of the indoor unit 12 sends an instruction to display "Ventilation Recommended" on the display unit 26 in step S35 of FIG. 9A, and then operates the ventilation device 31 in step S37. The control unit 15 also sets a predetermined waiting time between step S35 and step S37 (step S36). Therefore, the display unit 26 of the remote controller 22 can display the words "Ventilation Recommended" when the ventilation device 31 is activated. Therefore, the user can recognize that the ventilation device 31 is operating by looking at the display unit 26. Furthermore, the user can recognize that the carbon dioxide concentration is high by looking at the carbon dioxide concentration displayed on the display unit 26, and can thereby recognize that the ventilation device 31 is operating and the reason for its operation.

[0069] The timing for displaying the ventilation information on the display unit 26 and the timing for operating the ventilation device 31 may be simultaneous. The timing for both can be adjusted by, for example, the waiting time in step S36.

[0070] [Effects of the embodiment] (1) The air conditioning system 10 of the first to third embodiments described above includes an air conditioner 11 (indoor unit 12), a ventilation device 31, a sensor 21 that detects the carbon dioxide concentration in a living room S1 that is the target of air conditioning by the air conditioner 11 and the ventilation device, a display device 26 that displays ventilation information related to the operation of the ventilation device 31, and control devices 15, 25 that control the ventilation device 31 and the display device 26. Based on the detection result of the sensor 21, the control devices 15, 25 operate the ventilation device 31 simultaneously with or after displaying the ventilation information on the display device 26. Here, the ventilation information includes the above-mentioned text information such as "Ventilation recommended" or "Ventilation operating" and the carbon dioxide concentration in the living room S1.

[0071] According to the above configuration, the control devices 15, 25 operate the ventilation device 31 at the same time as or after displaying the ventilation information on the display device 26, so that the ventilation information is always displayed on the display device 26 when the ventilation device 31 is activated, and the user can recognize that the ventilation device 31 is operating by looking at the display.

[0072] (2) The air conditioning system 10 of the first and second embodiments further includes a remote controller 22 that is communicatively connected to the air conditioner 11 and has a display device (display unit) 26. The control devices 15, 25 include a control unit 25 provided in the remote controller 22, and the control unit 25 acquires the detection results of the sensor 21 and uses these detection results to determine whether or not to display ventilation information and operate the ventilation device 31. In this way, by having the control unit 25 of the remote controller 22 determine whether or not to display ventilation information and whether or not to operate the ventilation device 31, the ventilation information can be quickly displayed on the display device 26 in accordance with the results, and the ventilation device 31 can be operated simultaneously with or after this display.

[0073] (3) The air conditioning system 10 of the first and second embodiments further includes a remote controller 22 communicatively connected to the air conditioner 11 (indoor unit 12). The control devices 15, 25 include a control unit 25 provided in the remote controller 22, and the control unit 25 acquires the detection result of the sensor 21 and determines whether or not to display ventilation information and operate the ventilation device 31 based on whether or not the detection result exceeds a predetermined threshold. The control unit 25 further includes a memory 25b that stores the threshold. Therefore, the control unit 25 of the remote controller 22 can display ventilation information and determine whether or not to operate the ventilation device 31 using the threshold stored in the memory 25b.

[0074] (4) In the air conditioning system 10 of the first and second embodiments, the remote controller 22 includes an operation unit (input unit) 27 that accepts input of threshold values, and the control unit 25 stores the input threshold values in the memory 25b. This allows the threshold values to be easily set in accordance with the user's requests, etc.

[0075] (5) In the air conditioning system 10 of the third embodiment, the control devices 15, 25 include a control unit 15 provided in the air conditioner 11 (indoor unit 12), and the control unit 15 acquires the detection results of the sensor 21 and uses these detection results to determine whether or not it is necessary to display ventilation information and operate the ventilation device 31. Furthermore, when the control unit 15 determines that it is necessary to display ventilation information and operate the ventilation device 31, it instructs the display device 26 to display the ventilation information and then operates the ventilation device 31. Therefore, the ventilation device 31 can be operated after the ventilation information is displayed on the display device 26.

[0076] (6) The air conditioning system 10 of the third embodiment further includes a remote controller 22 that is communicatively connected to the air conditioner 11 (indoor unit 12) and has a display device 26. In this case, after ventilation information is displayed on the display device 26 of the remote controller 22, the ventilation device 31 is operated.

[0077] (7) In the air conditioning systems 10 of the first to third embodiments, when the control devices 15, 25 determine that the display of ventilation information and the operation of the ventilation device 31 are unnecessary while the ventilation device 31 is operating, they hide the ventilation information displayed on the display device 26 and continue to operate the ventilation device 31 until a certain time has passed since the operation. With this configuration, when the carbon dioxide concentration decreases while the ventilation device 31 is operating and further ventilation is no longer necessary, the control devices 15, 25 hide the ventilation information that was displayed on the display device 26. On the other hand, even if the carbon dioxide concentration decreases, the control devices 15, 25 do not immediately stop the ventilation device 31 but continue to operate the ventilation device 31 until a certain time has passed. This makes it possible to suppress the phenomenon of the ventilation device 31 frequently repeating operation and stopping (hunting phenomenon).

[0078] It should be noted that the present disclosure is not limited to the above examples, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. Although the ventilation device in the above embodiment is configured to include only a fan, it may also include a heat exchanger such as a total heat exchanger. Furthermore, if the ventilation device includes a control unit, the ventilation device can be operated by sending an operation instruction from the control unit of the indoor unit or the control unit of the remote controller to the control unit of the ventilation device.

[0079] The control device includes a control unit for the remote controller and a control unit for the indoor unit, but may also include other control units. For example, the control device may include a central controller that centrally manages the air conditioning system, or a remote management device that is communicatively connected to the air conditioner 11 or the central controller via the Internet or the like.

[0080] The display device in the above embodiment is configured as the display unit of the remote controller, but is not limited to this and may be provided in the indoor unit, ventilation device, etc., or may be configured independently (separately) from these. For example, the display device may be configured as a display of a mobile terminal such as a smartphone or tablet PC connected to be able to communicate with the control unit of the remote controller or the control unit of the indoor unit.

[0081] The flowcharts shown in FIGS. 4A, 4B, 7A, 7B, 9A, and 9B show examples of processing procedures in the interlocking control mode, and the present disclosure is not limited to these. The indoor unit and the ventilation device do not necessarily need to be linked, and the control device of the indoor unit or the remote controller may simply control the operation of the ventilation device in accordance with the carbon dioxide concentration. [Explanation of symbols]

[0082] 10: Air conditioning system 11:Air conditioner 12: Indoor unit 15: Control unit (control device) 21: Sensor 22: Remote controller 25: Control unit (control device) 25b: Memory 26:Display section (display device) 27: Operation section (input section) 31: Ventilation equipment S1: Living room

Claims

1. An air conditioner (11); A ventilation device (31); a sensor (21) for detecting a carbon dioxide concentration in a room that is an air conditioning target of the air conditioner (11) and the ventilation device (31); a display device (26) for displaying ventilation information relating to the operation of the ventilation device (31); a control device (15, 25) that controls the ventilation device (31) and the display device (26); and a remote controller (22) that is communicatively connected to the air conditioner (11) and has the display device (26), The control device (15, 25) operates the ventilation device (31) simultaneously with or after displaying the ventilation information on the display device (26) based on the detection result of the sensor (21), The control device (15, 25) includes a control unit (25) provided in the remote controller (22), the control unit (25) acquires the detection result of the sensor (21) and determines whether or not it is necessary to display the ventilation information and operate the ventilation device (31) using the detection result; The air conditioner (11) has an indoor unit (12) installed indoors, The air conditioning system, wherein the sensor (21) is provided in the indoor unit (12).

2. the control unit (25) determines whether or not it is necessary to display the ventilation information and operate the ventilation device (31) depending on whether or not the detection result of the sensor (21) exceeds a predetermined threshold value; 2. The air conditioning system according to claim 1, wherein the control unit (25) has a memory (25b) for storing the threshold value.

3. the remote controller (22) includes an input unit (27) that accepts input of the threshold value; The air conditioning system according to claim 2, wherein the control unit (25) stores the input threshold value in the memory (25b).

4. The air conditioning system according to any one of claims 1 to 3, wherein, when the control device (15, 25) determines that display of the ventilation information and operation of the ventilation device (31) are unnecessary while the ventilation device (31) is operating, the control device (15, 25) hides the ventilation information displayed on the display device (26) and continues to operate the ventilation device (31) until a certain time has elapsed since the operation.

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