Air Conditioning System

Abstract

This air conditioning system (1-1) comprises: a room temperature detection unit (14, 17) that detects an indoor temperature of a room in which indoor units (2, 3) are installed; a forced operation control unit (191) that causes the indoor units (2, 3) to start an air conditioning operation when the indoor temperature is higher than or equal to a predetermined room temperature threshold value; a solar radiation amount acquisition unit (20) that acquires a solar radiation amount; an indoor temperature storage unit (21) that stores a change in the indoor temperature associated with a change in the solar radiation amount; and a room temperature threshold value adjustment unit (192-1) that lowers the room temperature threshold value to be less than a predetermined reference value when it is detected that the solar radiation amount is greater than or equal to a predetermined solar radiation threshold value and the change in the indoor temperature associated with the change in the solar radiation amount in the past is greater than or equal to a predetermined temperature change threshold value.

Description

[Technical field]

[0001] The present disclosure relates to an air conditioning system having a function for preventing heat stroke. [Background technology]

[0002] Conventionally, air conditioning systems have been known that have a function for preventing serious accidents such as heatstroke from occurring to people indoors. For example, Patent Document 1 discloses an air conditioning system that transmits warning information to an external terminal when it is determined that the indoor temperature is higher than the temperature at which there is a risk of developing heatstroke, and notifies a user of the warning information received by the external terminal.

[0003] Patent Document 1 also shows that air conditioning operation can be started after warning information is sent to an external terminal, and that the risk of developing heat stroke can be determined by detecting the amount of sunlight using a sunlight sensor. Specifically, Patent Document 1 describes that the predetermined temperature, which is the standard for determining the risk of heat stroke, is corrected to be lower as the amount of sunlight increases, and is corrected to be higher as the amount of sunlight decreases. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-098990 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the above-mentioned conventional technology, high levels of solar radiation do not necessarily lead to high indoor temperatures, and there was a problem in that it was sometimes impossible to accurately assess the risk of heatstroke and control the indoor unit.

[0006] The present disclosure has been made in consideration of the above, and has an object to provide an air conditioning system that is capable of accurately determining the risk of heat stroke and controlling an indoor unit. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the air conditioning system of the present disclosure includes a room temperature detection unit that detects the indoor temperature of a room in which an indoor unit is installed, a forced operation control unit that causes the indoor unit to start air conditioning operation when the indoor temperature is equal to or higher than a predetermined room temperature threshold, and a solar radiation amount acquisition unit that acquires the amount of solar radiation. In the past solar radiation When increases from a first value to a second value Indoor temperature Temperature rise and when it is detected that the amount of solar radiation is equal to or greater than a predetermined solar radiation threshold, Temperature rise is equal to or greater than a predetermined temperature change threshold value, the room temperature threshold value adjustment unit lowers the room temperature threshold value below a predetermined reference value. Effect of the Invention

[0008] According to the present disclosure, it is possible to accurately determine the risk of heat stroke and control the indoor unit. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing a configuration of an air conditioning system according to first to third embodiments. [Diagram 2] FIG. 1 is a diagram showing a functional configuration of an air conditioning system according to a first embodiment. [Diagram 3] 5 is a flowchart illustrating the operation of the room temperature threshold adjustment unit shown in FIG. 2. [Figure 4] 3 is a flowchart illustrating the operation of the forced operation control unit shown in FIG. 2. [Diagram 5] FIG. 13 is a diagram showing a functional configuration of an air conditioning system according to a second embodiment. [Figure 6] A flowchart for explaining the operation of the room temperature threshold adjustment unit shown in FIG. [Figure 7]FIG. 13 is a diagram showing a functional configuration of an air conditioning system according to a third embodiment. [Figure 8] FIG. 1 is a diagram showing dedicated hardware for realizing the functions of the air conditioning systems according to the first to third embodiments. [Figure 9] FIG. 1 is a diagram showing the configuration of a control circuit for implementing the functions of the air conditioning system according to the first to third embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] An air conditioning system according to an embodiment of the present disclosure will be described in detail below with reference to the drawings.

[0011] Embodiment 1 FIG. 1 is a diagram showing the configuration of an air conditioning system 1 according to the first to third embodiments. The air conditioning system 1 has a plurality of indoor units 2, 3 installed indoors and an outdoor unit 4 installed outdoors. The indoor unit 2 and the outdoor unit 4 are connected by a refrigerant pipe 5 for heat exchange and an internal and external communication line 6 for information exchange. The indoor unit 3 and the outdoor unit 4 are connected by a refrigerant pipe 7 for heat exchange and an internal and external communication line 8 for information exchange. The indoor unit 2 is provided with an indoor temperature sensor 9 that detects the temperature in the room in which the indoor unit 2 is installed. The indoor unit 3 is provided with an indoor temperature sensor 10 that detects the temperature in the room in which the indoor unit 3 is installed. The outdoor unit 4 is provided with a solar radiation sensor 11 that detects the amount of solar radiation and an outdoor air temperature sensor 12 that detects the outdoor air temperature.

[0012] FIG. 2 is a diagram showing the functional configuration of an air conditioning system 1-1 according to the first embodiment. Since the air conditioning systems 1 according to the first to third embodiments have different functional configurations of the outdoor unit 4, the air conditioning systems 1 and the outdoor units 4 according to the respective embodiments are distinguished from each other by adding a hyphen and a number after the reference numerals. The air conditioning system 1 according to the first embodiment is referred to as the air conditioning system 1-1, and the outdoor unit 4 according to the first embodiment is referred to as the outdoor unit 4-1. The indoor unit 2 has an indoor unit control unit 13, a room temperature detection unit 14, and a communication unit 15. The indoor unit 3 has an indoor unit control unit 16, a room temperature detection unit 17, and a communication unit 18. The outdoor unit 4-1 has an outdoor unit control unit 19-1, a solar radiation amount acquisition unit 20, an indoor temperature storage unit 21, and a communication unit 22.

[0013] The indoor unit control unit 13 controls the operation of the indoor unit 2, and the indoor unit control unit 16 controls the operation of the indoor unit 3. The room temperature detection unit 14 detects the indoor temperature of the room in which the indoor unit 2 is installed, and the room temperature detection unit 17 detects the indoor temperature of the room in which the indoor unit 3 is installed. The communication unit 15 exchanges information between the outdoor unit 4-1 and the indoor unit 2, and the communication unit 18 exchanges information between the outdoor unit 4-1 and the indoor unit 3.

[0014] The outdoor unit control unit 19-1 controls the operation of the outdoor unit 4-1. The outdoor unit control unit 19-1 has a forced operation control unit 191 and a room temperature threshold adjustment unit 192-1. The forced operation control unit 191 performs a forced operation to forcibly start the air conditioning operation of the indoor units 2, 3 when the indoor temperature of the room in which the indoor units 2, 3 are installed is equal to or higher than the room temperature threshold in order to prevent heat stroke. When the air conditioning system 1 has a plurality of indoor units 2, 3, the forced operation control unit 191 judges whether or not to perform a forced operation for each of the indoor units 2, 3. The room temperature threshold is provided with a reference value that is normally used. The room temperature threshold adjustment unit 192-1 has a function of adjusting the room temperature threshold used by the forced operation control unit 191. Specifically, when the solar radiation acquisition unit 20 detects that the solar radiation amount is equal to or higher than the predetermined solar radiation amount threshold, the room temperature threshold adjustment unit 192-1 has a function of lowering the room temperature threshold below the predetermined reference value if the change in the indoor temperature associated with the change in the solar radiation amount in the past is equal to or higher than the predetermined temperature change threshold.

[0015] The solar radiation amount acquisition unit 20 has a function of detecting the amount of solar radiation. The solar radiation amount acquisition unit 20 outputs the detected amount of solar radiation to the outdoor unit control unit 19-1. The indoor temperature storage unit 21 stores the change in indoor temperature accompanying the change in the amount of solar radiation detected by the solar radiation amount acquisition unit 20. The indoor temperature storage unit 21 stores the change in indoor temperature accompanying the change in the amount of solar radiation for each of the multiple indoor units 2, 3. The communication unit 22 exchanges information with each of the indoor units 2, 3.

[0016] Examples of information exchanged between the indoor units 2, 3 and the outdoor unit 4-1 include indoor temperature and forced operation commands. For example, the communication units 15, 18 can transmit the detected indoor temperature to the communication unit 22 of the outdoor unit 4-1. The indoor temperature received by the communication unit 22 is stored in the indoor temperature storage unit 21. The communication unit 22 can also transmit a forced operation command to the communication units 15, 18 of the indoor units 2, 3. The indoor unit control units 13, 16 can forcibly start operation according to the forced operation command received by the communication units 15, 18 even without a user command.

[0017] FIG. 3 is a flowchart for explaining the operation of the room temperature threshold adjusting unit 192-1 shown in FIG.

[0018] First, the room temperature threshold adjustment unit 192-1 acquires the amount of solar radiation detected by the solar radiation acquisition unit 20, and judges whether the amount of solar radiation is a first value determined in advance (step S1). If the amount of solar radiation is the first value (step S1: Yes), the room temperature threshold adjustment unit 192-1 records the room temperature A at this time in the room temperature storage unit 21 (step S2). If the amount of solar radiation is not the first value (step S1: No) and after recording the room temperature A, the room temperature threshold adjustment unit 192-1 judges whether the amount of solar radiation detected by the solar radiation acquisition unit 20 is a second value greater than the first value (step S3). If the amount of solar radiation is the second value (step S3: Yes), the room temperature threshold adjustment unit 192-1 records the room temperature B at this time in the room temperature storage unit 21 (step S4).

[0019] If the amount of solar radiation is not the second value (step S3: No) and after recording room temperature B in step S4, the room temperature threshold adjustment unit 192-1 subtracts room temperature A from room temperature B using the recorded room temperature A and room temperature B, and judges whether "room temperature B - room temperature A" is equal to or greater than a predetermined temperature change threshold (step S5). If room temperature B - room temperature A is equal to or greater than the temperature change threshold (step S5: Yes), the room temperature threshold adjustment unit 192-1 judges whether the current amount of solar radiation is equal to or greater than the solar radiation threshold (step S6). If the amount of solar radiation is equal to or greater than the solar radiation threshold (step S6: Yes), the room temperature threshold adjustment unit 192-1 lowers the room temperature threshold for judging the start of forced operation below the reference value (step S7). If room temperature B - room temperature A is not equal to or greater than the temperature change threshold (step S5: No), if the amount of solar radiation is not equal to or greater than the solar radiation threshold (step S6: No), and after step S7, the room temperature threshold adjustment unit 192-1 ends the process.

[0020] The process shown in FIG. 3 is executed repeatedly. In addition, in order to record how much the indoor temperature has risen when the amount of solar radiation increases from a first value to a second value, it is desirable to reset the room temperature A and the room temperature B, for example, every day. In addition, the process shown in FIG. 3 is executed for each of the indoor units 2 and 3. That is, the indoor temperature storage unit 21 stores the change in the indoor temperature accompanying the change in the amount of solar radiation for each of the indoor units 2 and 3, and the room temperature threshold adjustment unit 192-1 adjusts the room temperature threshold when the change in the indoor temperature accompanying the past change in the amount of solar radiation for each of the indoor units 2 and 3 is equal to or greater than the temperature change threshold. By adjusting the room temperature threshold for each of the indoor units 2 and 3, it becomes possible to reduce the risk of heat stroke by forcibly operating only the indoors where the influence of the change in the amount of solar radiation is large and the risk of heat stroke is high.

[0021] The process shown in FIG. 3 is an example of a process for adjusting the room temperature threshold value for determining whether or not to forcibly start the air conditioning operation of the indoor units 2 and 3 by storing the change in the room temperature due to the change in the amount of solar radiation, and the process contents and the order of the processes are not limited to those shown in the figure, as long as the same effect is obtained. For example, the room temperature threshold adjustment unit 192-1 may periodically store the amount of solar radiation detected by the solar radiation acquisition unit 20 and the room temperature of each room detected by the room temperature detection units 14 and 17, and, for example, at the end of the day, using the data stored on that day, determine the room temperature A when the amount of solar radiation becomes a first value and the room temperature B when the amount of solar radiation becomes a second value, and determine whether the room temperature B - the room temperature A is equal to or greater than the temperature change threshold value. The room temperature threshold adjustment unit 192-1 may also store the indoor units 2 and 3 whose room temperature B - the room temperature A is equal to or greater than the temperature change threshold value as the units requiring adjustment. In this case, the room temperature threshold adjustment unit 192-1 repeats the processing of steps S6 and S7, and when the amount of solar radiation becomes equal to or greater than the solar radiation threshold, it adjusts the room temperature threshold of the unit requiring adjustment lower than the reference value, and leaves the room temperature threshold of the unit not requiring adjustment at the reference value.

[0022] Fig. 4 is a flow chart for explaining the operation of the forced operation control unit 191 shown in Fig. 2. The forced operation control unit 191 judges whether the indoor temperature detected by the room temperature detection units 14, 17 is equal to or higher than the room temperature threshold (step S8). If the indoor temperature is equal to or higher than the room temperature threshold (step S8: Yes), the forced operation control unit 191 commands the indoor unit control unit 13 or indoor unit control unit 16 of the indoor unit 2 or indoor unit 3 installed in the room where the indoor temperature is equal to or higher than the room temperature threshold to start forced operation (step S9). If the indoor temperature is not equal to or higher than the room temperature threshold (step S8: No), the process of step S9 is omitted.

[0023] In step S8, if the room temperature threshold value is lowered below the reference value in step S7 of FIG. 3, the determination is made based on the lowered value.

[0024] As described above, according to the air conditioning system 1 of the first embodiment, when the change in the indoor temperature accompanying the change in the amount of solar radiation is equal to or greater than the predetermined temperature change threshold, when it is detected that the amount of solar radiation is equal to or greater than the predetermined solar radiation threshold, the room temperature threshold is lowered below the reference value that is normally used. Therefore, in a room in which the change in the indoor temperature accompanying the change in the amount of solar radiation is greater than the temperature change threshold, if the amount of solar radiation is greater than the solar radiation threshold, the forced operation is started at a temperature lower than the normal temperature. Also, in a room in which the change in the indoor temperature accompanying the change in the amount of solar radiation is smaller than the temperature change threshold, even if the amount of solar radiation becomes greater than the solar radiation threshold, the room temperature threshold remains at the reference value that is normally used. Therefore, it is possible to start the forced operation early, limited to a room in which the indoor temperature is likely to change with the change in the amount of solar radiation, and it is possible to accurately determine the risk of heat stroke and control the indoor units 2, 3.

[0025] Embodiment 2 Fig. 5 is a diagram showing the functional configuration of an air conditioning system 1-2 according to embodiment 2. Note that the same reference numerals are used to designate the same parts as in embodiment 1, and detailed explanations are omitted here. Below, the parts that differ from embodiment 1 will be mainly described.

[0026] Air conditioning system 1-2 has indoor units 2 and 3 and an outdoor unit 4-2. Outdoor unit 4-2 has an outdoor unit control unit 19-2, a communication unit 22, an outdoor air temperature acquisition unit 23 that acquires the outdoor air temperature, and a high temperature detection date memory unit 24 that stores a date determined to be a high temperature detection date based on the outdoor air temperature. Outdoor unit control unit 19-2 has a forced operation control unit 191 and a room temperature threshold adjustment unit 192-2.

[0027] The room temperature threshold adjustment unit 192-2 has a function of adjusting the room temperature threshold used by the forced operation control unit 191. Specifically, the room temperature threshold adjustment unit 192-2 stores in the high temperature detection date storage unit 24, as a high temperature detection date, a date on which a judgment temperature based on the outdoor air temperature detected during a day became equal to or higher than a predetermined high temperature threshold. Then, if a predetermined period of time has passed since the stored high temperature detection date, the room temperature threshold adjustment unit 192-2 adjusts the room temperature threshold lower than a predetermined reference value. This makes it possible to determine that the risk of heatstroke is high during times when the user is not accustomed to the heat, and to start forced operation at a room temperature lower than normal.

[0028] Fig. 6 is a flow chart for explaining the operation of the room temperature threshold adjusting unit 192-2 shown in Fig. 5. The room temperature threshold adjusting unit 192-2 judges whether the daily average value of the outside air temperature acquired by the outside air temperature acquiring unit 23 is equal to or higher than the high temperature threshold (step S10). If the daily average value of the outside air temperature is equal to or higher than the high temperature threshold (step S10: Yes), the room temperature threshold adjusting unit 192-2 stores the current date as the high temperature detection date (step S11). In addition, the room temperature threshold adjusting unit 192-2 sets the room temperature threshold to a reference value (step S12).

[0029] If the daily average value of the outside air temperature is not equal to or greater than the high temperature threshold (step S10: No) and after step S12, the room temperature threshold adjustment unit 192-2 determines whether the number of days elapsed since the high temperature detection date is equal to or greater than a predetermined number of days (step S13). If the number of days elapsed is equal to or greater than the predetermined number of days (step S13: Yes), the room temperature threshold adjustment unit 192-2 lowers the room temperature threshold below the reference value (step S14). If the number of days elapsed is not equal to or greater than the predetermined number of days (step S13: No) and after step S14, the room temperature threshold adjustment unit 192-2 ends the process.

[0030] 6 is performed, for example, at a timing when the average outdoor air temperature of a day can be calculated. The room temperature threshold adjusting unit 192-2 can perform the process shown in FIG. 6 at a predetermined time every day.

[0031] The daily average value of the outdoor air temperature is an example of a judgment temperature based on the outdoor air temperature detected during a day, and the judgment temperature may be the maximum outdoor air temperature or the average value during a predetermined daytime period of a day. In step S10, if the judgment temperature is below the high temperature threshold, nothing is done, so that in hot weather, when the judgment temperature becomes equal to or higher than the high temperature threshold, the high temperature detection date continues to be updated, and in cold weather, the date immediately before the outdoor air temperature drops is stored. For this reason, the room temperature threshold adjustment unit 192-2 counts the number of days that have passed since the stored high temperature detection date, and when a predetermined period has passed, the room temperature threshold is lowered, making it possible to start forced operation at a lower indoor temperature than usual when the user is not yet accustomed to the heat.

[0032] As described above, according to the air conditioning system 1-2 of the second embodiment, the day on which the judgment temperature is equal to or higher than the high temperature threshold is stored as the high temperature detection day, and when a predetermined period of time has passed since the last high temperature detection day, the room temperature threshold is lowered below the reference value. Therefore, when a predetermined period of time has passed since the most recent high temperature detection day and it is considered that the user is not yet accustomed to the heat, it is determined that the risk of heat stroke is higher than during normal periods when the user has become accustomed to the heat, and when the indoor temperature rises, forced operation is started earlier than usual. Therefore, it is possible to accurately determine the risk of heat stroke and control the indoor units 2, 3.

[0033] Embodiment 3 7 is a diagram showing the functional configuration of an air conditioning system 1-3 according to embodiment 3. Note that the same reference numerals are used to designate the same parts as those in embodiments 1 and 2, and detailed descriptions thereof will be omitted here. The air conditioning system 1-3 has indoor units 2 and 3 and an outdoor unit 4-3.

[0034] The outdoor unit 4-3 has an outdoor unit control unit 19-3, a solar radiation amount acquisition unit 20, an indoor temperature storage unit 21, a communication unit 22, an outdoor air temperature acquisition unit 23, and a high temperature detection date storage unit 24. The outdoor unit control unit 19-3 has a forced operation control unit 191 and a room temperature threshold adjustment unit 192-3.

[0035] The room temperature threshold adjusting unit 192-3 has both the function of the room temperature threshold adjusting unit 192-1 and the function of the room temperature threshold adjusting unit 192-2. The room temperature threshold adjusting unit 192-3 performs the process shown in FIG.

[0036] As described above, according to the air conditioning system 1-3 of the third embodiment, it is possible to obtain both the effects of the air conditioning system 1-1 of the first embodiment and the effects of the air conditioning system 1-2 of the second embodiment, and it becomes possible to more accurately determine the risk of heat stroke and control the indoor units 2, 3.

[0037] Next, the hardware configuration of the air conditioning system 1 according to the first to third embodiments will be described. The room temperature detection units 14, 17 are the room temperature sensors 9, 10 shown in FIG. 1, and the communication units 15, 18, 22 are communication devices. The solar radiation acquisition unit 20 is the solar radiation sensor 11 shown in FIG. 1, and the outdoor air temperature acquisition unit 23 is the outdoor air temperature sensor 12 shown in FIG. 1. The indoor temperature storage unit 21 and the high temperature detection date storage unit 24 are each a storage device. The indoor unit control units 13, 16 and the outdoor unit control units 19-1 to 19-3 are realized by processing circuits. These processing circuits may be realized by dedicated hardware, or may be control circuits using a CPU (Central Processing Unit).

[0038] When the above processing circuits are realized by dedicated hardware, they are realized by a processing circuit 90 shown in Fig. 8. Fig. 8 is a diagram showing dedicated hardware for realizing the functions of the air conditioning systems 1-1 to 1-3 according to the first to third embodiments. The processing circuit 90 is a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination of these.

[0039] When the above processing circuit is realized by a control circuit using a CPU, the control circuit is, for example, a control circuit 91 having a configuration shown in FIG. 9. FIG. 9 is a diagram showing the configuration of the control circuit 91 for realizing the functions of the air conditioning systems 1-1 to 1-3 according to the first to third embodiments. As shown in FIG. 9, the control circuit 91 includes a processor 92 and a memory 93. The processor 92 is a CPU, and is also called a processing device, an arithmetic device, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like. The memory 93 is, for example, a non-volatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (registered trademark) (Electrically EPROM), a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD (Digital Versatile Disk).

[0040] When the above processing circuits are realized by the control circuit 91, they are realized by the processor 92 reading and executing programs stored in the memory 93 and corresponding to the processing of each component. The memory 93 is also used as a temporary memory for each process executed by the processor 92. Some of the functions of the air conditioning systems 1-1 to 1-3 may be realized by the processing circuit 90, and some may be realized by the control circuit 91. Furthermore, a plurality of control circuits 91 may work together to realize the functions of the air conditioning systems 1-1 to 1-3.

[0041] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies, or the embodiments may be combined with each other. Also, parts of the configurations may be omitted or modified without departing from the spirit of the invention.

[0042] For example, in the above-mentioned first to third embodiments, the functions of the room temperature threshold adjustment units 192-1 to 192-3 are provided in the outdoor units 4-1 to 4-3, but the technology of the present disclosure is not limited to such an example. In addition, in the above-mentioned first to third embodiments, the room temperature detection units 14, 17 are provided in the indoor units 2, 3, but the room temperature detection units 14, 17 may be provided in other devices that can be connected to the air conditioning systems 1-1 to 1-3, for example, a remote controller. In addition, the solar radiation amount acquisition unit 20 is the solar radiation amount sensor 11, but the solar radiation amount sensor 11 does not necessarily have to be provided in the outdoor units. In addition, the outdoor air temperature acquisition unit 23 is the outdoor air temperature sensor 12, but the outdoor air temperature sensor 12 does not necessarily have to be provided in the outdoor units 4-1 to 4-3. Furthermore, the functions of the room temperature threshold adjusting units 192-1 to 192-3 are provided in the outdoor units 4-1 to 4-3, but the functions of the room temperature threshold adjusting units 192-1 to 192-3 may be implemented in a device separate from the outdoor units 4-1 to 4-3. [Explanation of symbols]

[0043] 1,1-1 to 1-3 air conditioning system, 2,3 indoor unit, 4,4-1 to 4-3 outdoor unit, 5,7 refrigerant piping, 6,8 indoor and outdoor communication lines, 9,10 indoor temperature sensor, 11 solar radiation sensor, 12 outdoor air temperature sensor, 13,16 indoor unit control unit, 14,17 room temperature detection unit, 15,18,22 communication unit, 19-1 to 19-3 outdoor unit control unit, 20 solar radiation acquisition unit, 21 indoor temperature storage unit, 23 outdoor air temperature acquisition unit, 24 high temperature detection date storage unit, 90 processing circuit, 91 control circuit, 92 processor, 93 memory, 191 forced operation control unit, 192-1 to 192-3 room temperature threshold adjustment unit.

Claims

1. A room temperature detection unit that detects the room temperature in the room in which the indoor unit is installed; a forced operation control unit that causes the indoor unit to start air conditioning operation when the indoor temperature is equal to or higher than a predetermined room temperature threshold; A solar radiation amount acquisition unit that acquires a solar radiation amount; an indoor temperature storage unit that stores an amount of increase in the indoor temperature when the amount of solar radiation has increased from a first value to a second value in the past; a room temperature threshold adjustment unit that, when detecting that the amount of solar radiation is equal to or greater than a predetermined solar radiation threshold, lowers the room temperature threshold below a predetermined reference value if the amount of temperature increase is equal to or greater than a predetermined temperature change threshold; An air conditioning system comprising:

2. A plurality of the indoor units are provided, The room temperature detection unit is provided in a plurality of units corresponding to the plurality of indoor units, The indoor temperature storage unit stores the temperature rise amount for each indoor unit, the room temperature threshold adjustment unit determines whether the amount of temperature rise is equal to or greater than a predetermined temperature change threshold for each indoor unit, and adjusts the room temperature threshold for each indoor unit. The air conditioning system of claim 1 .

3. an outside air temperature acquisition unit that acquires an outside air temperature; a high temperature detection date storage unit that stores, as a high temperature detection date, a date on which a determination temperature based on the outside air temperature detected during a day becomes equal to or higher than a predetermined high temperature threshold; Further equipped with the room temperature threshold adjustment unit lowers the room temperature threshold below the reference value when a predetermined period of time has elapsed since the most recent stored high temperature detection date.

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

4. The room temperature detection unit is provided in the indoor unit, The solar radiation amount acquisition unit, the indoor temperature storage unit, and the room temperature threshold adjustment unit are provided in an outdoor unit connected to the indoor unit. The air conditioning system of claim 1 .

5. A room temperature detection unit that detects the room temperature in the room in which the indoor unit is installed; a forced operation control unit that causes the indoor unit to start air conditioning operation when the indoor temperature is equal to or higher than a predetermined room temperature threshold; an outside air temperature acquisition unit that acquires an outside air temperature; a high temperature detection date storage unit that stores, as a high temperature detection date, a date on which a determination temperature based on the outside air temperature detected during a day becomes equal to or higher than a predetermined high temperature threshold; a room temperature threshold adjustment unit that lowers the room temperature threshold below a predetermined reference value when a predetermined period of time has elapsed since the latest stored high temperature detection date; An air conditioning system comprising:

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