Air conditioning system

Abstract

Air conditioning system (100) comprises: an external heater provided in a room; an external indoor temperature detector that is provided outside an indoor unit (11) in the room and detects an externally-detected indoor temperature that is detected outside the indoor unit (11); and a communication relay that relays the communication between the external indoor temperature detector and the indoor unit (11). The indoor unit (11) has: an internal indoor temperature detector that detects an internally-detected indoor temperature that is detected inside the indoor unit (11); an operation determination section (114) that determines whether or not the internal indoor temperature detector is operating normally; and a heater control section (115) that, if it is determined that the internal indoor temperature detector is operating normally, controls the external heater on the basis of the internally-detected indoor temperature, and that, if it is determined that the internal indoor temperature detector is not operating normally, controls the external heater on the basis of the externally-detected indoor temperature obtained from the external indoor temperature detector via the communication relay.

Description

Technical Field

[0001] The present disclosure relates to an air conditioning system including a heater for heating assistance to compensate for insufficient heating capacity by a refrigeration cycle.

Background Art

[0002] Conventionally, in an air conditioner, a configuration including a heater for heating assistance to compensate for insufficient heating capacity by a refrigeration cycle is known. For example, Patent Document 1 discloses an air conditioner including a heater built in an indoor unit or a heater provided outside the indoor unit for heating assistance, and an indoor temperature detection unit provided in the indoor unit for detecting the indoor temperature in an air conditioning area, and controlling the rotation speed of a compressor and the operation and stop of the heater based on the indoor temperature detected by the indoor temperature detection unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the air conditioner described in Patent Document 1, the heater is controlled based on the indoor temperature detected by the indoor temperature detection unit provided in the indoor unit. Therefore, when the indoor temperature detection unit fails and the indoor temperature cannot be obtained, the air conditioner described in Patent Document 1 has a problem that the heater cannot be appropriately controlled and there is a risk that the indoor temperature drops below the set temperature.

[0005] The present disclosure has been made in view of the above, and an object thereof is to obtain an air conditioning system including an external heater for heating assistance and capable of appropriately controlling the external heater even when the indoor temperature detection unit provided in the indoor unit of the air conditioner fails.

Means for Solving the Problem

[0006] To solve the above-described problems and achieve the object, an air conditioning system according to the present disclosure has a refrigeration cycle in which an indoor unit provided in a room, which is a region to be air-conditioned, and an outdoor unit provided outdoors are connected by a refrigerant pipe that circulates a refrigerant. machine The air conditioning system includes an external heater provided indoors, an external room temperature detection unit provided outside the indoor unit indoors and detecting an external detected room temperature, which is the indoor temperature detected outside the indoor unit, and a communication relay device that relays communication between the external room temperature detection unit and the indoor unit. The indoor unit includes an internal room temperature detection unit that detects an internal detected room temperature, which is the indoor temperature detected in the indoor unit, an operation determination unit that determines whether or not the internal room temperature detection unit is operating normally, and a heater control unit that controls the external heater based on the internal detected room temperature when it is determined that the internal room temperature detection unit is operating normally, and controls the external heater based on the external detected room temperature obtained from the external room temperature detection unit via the communication relay device when it is determined that the internal room temperature detection unit is not operating normally. When the operation determination unit determines that the internal room temperature detection unit is not operating normally, it determines whether the external room temperature detection unit is operating normally. When it is determined that the internal room temperature detection unit is not operating normally and further determined that the external room temperature detection unit is operating normally, the heater control unit controls the external heater based on the corrected room temperature obtained by correcting the external detected room temperature based on a predetermined correction value.

Advantages of the Invention

[0007] The air conditioning system according to the present disclosure includes an external heater for auxiliary heating, and has an effect that even when the room temperature detection unit provided in the indoor unit of the air conditioner fails, the external heater can be appropriately controlled.

Brief Description of the Drawings

[0008]

Figure 1

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Mode for Carrying Out the Invention

[0009] Hereinafter, the air conditioning system according to the embodiment will be described in detail with reference to the drawings.

[0010] Embodiment 1. FIG. 1 is a configuration diagram schematically showing the configuration of the air conditioning system 100 according to Embodiment 1. FIG. 2 is a refrigerant circuit diagram showing the refrigeration cycle of the air conditioning system 100 according to Embodiment 1. FIG. 3 is a functional block diagram showing the functional configuration of the air conditioning system 100 according to Embodiment 1.

[0011] As shown in FIGS. 1 and 3, the air conditioning system 100 according to Embodiment 1 includes an air conditioner 10 having an indoor unit 11 installed indoors and an outdoor unit 12 installed outdoors, a refrigerant pipe 14 for circulating refrigerant between the indoor unit 11 and the outdoor unit 12, a remote controller 13 for transmitting a control instruction command for the air conditioner 10 to the indoor unit 11, an external heater 15 provided indoors, an external indoor temperature sensor 16 for detecting the indoor temperature which is the temperature of the indoor air, and a wireless relay 17 for relaying communication between the indoor unit 11 and the external indoor temperature sensor 16. The outdoor unit 12 is capable of communicating with the indoor unit 11 via a communication line (not shown). Hereinafter, the remote controller may sometimes be referred to as a remote control.

[0012] The air conditioner 10 forms one complete refrigeration cycle with the indoor unit 11 and the outdoor unit 12. The air conditioner 10 uses the refrigerant that circulates between the indoor unit 11 and the outdoor unit 12 through the refrigerant pipe 14 to perform heat transfer between the indoor air, which is the air conditioning target area, and the outdoor air, thereby realizing air conditioning for the indoor space. That is, the indoor unit 11 and the outdoor unit 12 are connected by the refrigerant pipe 14, and the pressure of the refrigerant flowing in the refrigerant pipe 14 is changed by a compressor 1 (described later) provided in the outdoor unit 12, and air conditioning is performed by the heat absorption and heat dissipation of the refrigerant.

[0013] As shown in FIG. 2, the indoor unit 11 includes an indoor heat exchanger 4 that constitutes a refrigeration cycle. Also, as shown in FIG. 2, the outdoor unit 12 includes a compressor 1, an outdoor heat exchanger 2, an expansion valve 3, a four-way valve 5, and an outside air temperature sensor 6, which constitute a refrigeration cycle. The refrigeration cycle of the air conditioner 10 is configured by sequentially connecting the compressor 1, the four-way valve 5, the outdoor heat exchanger 2, the expansion valve 3, and the indoor heat exchanger 4 by the refrigerant pipe 14. Also, the indoor unit 11 and the outdoor unit 12 are also connected to each other by a communication line (not shown).

[0014] An external heater 15 is connected to the indoor unit 11 for auxiliary heating of the air conditioner 10. Here, the external heater 15 is an external heater provided independently of the air conditioner 10 outside the air conditioner 10 in the room, which is the area to be air-conditioned. That is, the indoor unit 11 has a configuration capable of connecting the external external heater 15.

[0015] An outside air temperature sensor 6 is attached to the outdoor unit 12 as an outside air temperature detection unit. The outside air temperature sensor 6 detects the outside air temperature as the temperature of the outside air, which is the outdoor air. Information on the outside air temperature detected by the outside air temperature sensor 6 is transmitted to an air conditioning control unit 118 described later.

[0016] The four-way valve 5 is a valve for switching the direction of the refrigerant flow. During the heating operation, the four-way valve 5 sets the refrigerant flow path so as to connect the discharge side of the compressor 1 and the indoor heat exchanger 4, and to connect the suction side of the compressor 1 and the outdoor heat exchanger 2. The indoor heat exchanger 4 functions as a condenser for the refrigerant during the heating operation and heats the indoor air.

[0017] In the refrigerant circuit configured as described above, during the heating operation, the refrigerant circulates along the path indicated by the solid line arrows shown in FIG. 2.

[0018] During the heating operation, the high-temperature and high-pressure refrigerant discharged from the compressor 1 flows into the indoor heat exchanger 4 mounted on the indoor unit 11 via the four-way valve 5. Here, the refrigerant flowing into the indoor heat exchanger 4 condenses by exchanging heat with the air sucked by the indoor unit 11. The refrigerant flowing out of the indoor heat exchanger 4 expands through the expansion valve 3 and flows into the outdoor heat exchanger 2 in a low-temperature and low-pressure state. Here, the refrigerant flowing into the outdoor heat exchanger 2 evaporates by exchanging heat with the air sucked by the outdoor unit 12, passes through the four-way valve 5, and is sucked into the compressor 1 again.

[0019] FIG. 4 is a block diagram showing the functional configuration of the indoor unit 11 of the air conditioner 10 according to Embodiment 1. The indoor unit 11 includes an indoor unit air conditioning unit 111, an indoor unit blower 112, an internal room temperature sensor 113, an operation determination unit 114, a heater control unit 115, an indoor unit memory unit 116, an indoor unit communication unit 117, and an air conditioning control unit 118.

[0020] The indoor unit air conditioning unit 111 has an air conditioning function in the indoor unit of a general air conditioner. The indoor unit air conditioning unit 111 includes an indoor heat exchanger 4 that performs heat exchange between the air taken into the indoor unit 11 and the refrigerant flowing in the refrigerant circuit, a blower fan that sends out the conditioned air heat-exchanged by the indoor heat exchanger 4 from the indoor unit 11 into the room, and an air direction adjustment unit that adjusts the direction in which the conditioned air is sent out from the indoor unit 11. The air taken into the indoor unit 11 is the indoor air of the room where the indoor unit 11 is installed.

[0021] The indoor unit blower 112 forms an air flow passing through the indoor heat exchanger 4. That is, the indoor unit blower 112 forms an air flow that takes indoor air from the room into the indoor heat exchanger 4, that is, an air flow that supplies indoor air to the indoor heat exchanger 4.

[0022] The internal room temperature sensor 113 is built into the indoor unit 11 and is an internal room temperature detection unit that detects the room temperature, which is the temperature of the indoor air that is the air in the room that is the air conditioning target area, inside the air conditioner 10 at a predetermined cycle. The internal room temperature sensor 113 transmits the detected room temperature information to the air conditioning control unit 118. The room temperature detected by the internal room temperature sensor 113 is the internal detected room temperature, which is the room temperature detected in the indoor unit 11.

[0023] The operation determination unit 114 determines whether the internal room temperature sensor 113 is operating normally based on the information of the first room temperature Ta, which is the room temperature detected by the internal room temperature sensor 113. The operation determination unit 114 determines whether the internal room temperature sensor 113 is normal by comparing the first room temperature Ta acquired from the internal room temperature sensor 113 with a predetermined normal range of the room temperature.

[0024] The normal range of the indoor temperature is the range of temperature thresholds for determining whether the internal indoor temperature sensor 113 is normal by comparing the operation determination unit 114 with the first indoor temperature Ta indicated by the information of the first indoor temperature Ta, and is the range of the indoor temperature detected by the internal indoor temperature sensor 113 when the internal indoor temperature sensor 113 is operating normally. The information on the normal range of the indoor temperature is determined in advance and stored in the operation determination unit 114. Note that the information on the normal range of the indoor temperature may be stored in the indoor unit storage unit 116.

[0025] Also, the operation determination unit 114 determines whether the second indoor temperature Tb, which is the indoor temperature detected by the external indoor temperature sensor 16, is a normal value. The operation determination unit 114 determines whether the second indoor temperature Tb is a normal value by comparing the second indoor temperature Tb indicated by the information of the second indoor temperature Tb acquired from the external indoor temperature sensor 16 with the above-described normal range of the indoor temperature.

[0026] The heater control unit 115 controls the external heater 15 based on the determination result of whether the internal indoor temperature sensor 113 is operating normally in the operation determination unit 114. That is, when the air conditioning control unit 118 controls the heating operation of the air conditioner 10, the heater control unit 115 controls the operation of the external heater 15 based on the determination result of whether the internal indoor temperature sensor 113 is operating normally.

[0027] When it is determined by the operation determination unit 114 that the internal indoor temperature sensor 113 is operating normally, the heater control unit 115 controls the operation of the external heater 15 based on the first indoor temperature Ta, which is the indoor temperature detected by the internal indoor temperature sensor 113. When it is determined by the operation determination unit 114 that the internal indoor temperature sensor 113 is not operating normally, the heater control unit 115 controls the operation of the external heater 15 based on the second indoor temperature Tb, which is the indoor temperature detected by the external indoor temperature sensor 16.

[0028] Further, the heater control unit 115 calculates a corrected room temperature T_hosei by correcting the second room temperature Tb based on the trend of the error between the first room temperature Ta and the second room temperature Tb. The corrected room temperature T_hosei is a corrected value of the room temperature used for controlling the operation of the external heater 15 to suppress or eliminate the influence of the error between the first room temperature Ta and the second room temperature Tb when the heater control unit 115 controls the operation of the external heater 15 based on the second room temperature Tb.

[0029] The indoor unit storage unit 116 is a storage unit that stores information such as various control setting values and programs for controlling the operation of the air conditioner 10. The indoor unit storage unit 116 is a non-volatile storage unit and is composed of a semiconductor storage medium such as a flash memory.

[0030] The indoor unit communication unit 117 communicates with an external communication unit provided in each component other than the air conditioner 10 in the air conditioning system 100. That is, the indoor unit communication unit 117 communicates with the remote control communication unit 134 of the remote control 13, the communication unit (not shown) of the outdoor unit 12, and the external heater communication unit 152 of the external heater 15 described later. The indoor unit communication unit 117 transmits the information received from the external communication unit to the air conditioning control unit 118. The communication method between the external communication unit and the indoor unit communication unit 117 may be wired communication or wireless communication using Wi-Fi (registered trademark) (Wireless Fidelity) or Bluetooth (registered trademark).

[0031] The air conditioning control unit 118 is a control unit that controls the overall operation of the air conditioner 10, and controls the operations of the indoor unit 11 and the outdoor unit 12 to control the operation of the air conditioner 10. That is, the air conditioning control unit 118 operates the compressor 1 provided in the outdoor unit 12 based on the set temperature set in the air conditioning control unit 118, the room temperature, and the outdoor temperature, and performs cooling or heating operation.

[0032] The remote controller 13 is an operating device for the air conditioner 10 that transmits control instruction information for the air conditioner 10 to the indoor unit 11 to control the operation of the air conditioner 10. FIG. 5 is a block diagram showing the functional configuration of the remote controller 13 of the air conditioner 10 according to Embodiment 1. The remote controller 13 includes a remote controller operation unit 131, a remote controller display unit 132, a remote controller storage unit 133, a remote controller communication unit 134, and a remote controller control unit 135. Each component of the remote controller 13 described above can exchange information with each other.

[0033] The remote controller operation unit 131 receives setting operations related to the air conditioning of the air conditioner 10 requested by the user. That is, the remote controller operation unit 131 is an interface for remotely controlling the operation of the air conditioner 10 and receives operations related to the operation of the air conditioner 10 from the user. When the remote controller operation unit 131 receives an operation from the user, it outputs information corresponding to the user's operation as operation information to the remote controller control unit 135.

[0034] The remote controller operation unit 131 is configured such that the user can arbitrarily select various functions related to the air conditioning operation in the air conditioner 10, such as starting the operation of the air conditioner 10, stopping the operation of the air conditioner 10, selecting the operation mode of the air conditioner 10 including automatic wind direction tracking control, changing the set temperature, changing the set humidity, setting the air volume, setting the wind direction, and changing the setting of operation prohibition items. The selection of the operation mode of the air conditioner 10 includes the selection of the external heater heating operation mode, which is an operation mode of the heating operation using the external heater 15 based on the set temperature set by the user and the indoor temperature, and the selection of the normal heating operation mode, which is an operation mode of the heating operation without using the external heater 15.

[0035] The remote controller display unit 132 is a display unit that displays various information, displays information and states required for air conditioning by the air conditioner 10, such as the set temperature and operation mode of the air conditioner 10, and switches and displays a screen corresponding to the operation in the remote controller operation unit 131.

[0036] The remote control memory unit 133 stores various types of information necessary for the air conditioning process in the air conditioner 10, and temporarily or permanently stores information such as setting contents for display on the remote control display unit 132 and image data related to the setting contents.

[0037] The remote control communication unit 134 enables two-way communication of information with the indoor unit communication unit 117 of the indoor unit 11. Note that the communication with the indoor unit communication unit 117 may be wireless communication or wired communication.

[0038] The remote control control unit 135 controls the operation of the entire remote control 13. The remote control control unit 135 controls the remote control 13 based on the operation information transmitted from the remote control operation unit 131. Further, the remote control control unit 135 transmits the operation information transmitted from the remote control operation unit 131 to the air conditioning control unit 118 of the indoor unit 11. The remote control control unit 135 has a clock function.

[0039] The external heater 15 is a heater for auxiliary heating to compensate for the insufficient heating capacity by the refrigeration cycle in the air conditioner 10. The external heater 15 is provided outside the indoor unit 11 in the room that is the air conditioning target area of the air conditioner 10. FIG. 6 is a block diagram showing the functional configuration of the external heater 15 according to Embodiment 1. The external heater 15 includes a heater unit 151, an external heater communication unit 152, and an external heater control unit 153. Each component of the above external heater 15 can exchange information with each other.

[0040] The heater unit 151 has a heating function for heating air.

[0041] The external heater communication unit 152 communicates with the indoor unit communication unit 117 of the indoor unit 11.

[0042] The external heater control unit 153 is a control unit that controls the overall operation of the external heater 15. The external heater control unit 153 controls the operation of the heater unit 151 according to the control of the indoor unit 11.

[0043] The external indoor temperature sensor 16 is arranged outside the air conditioner 10 in the room, and is an external indoor temperature detection unit that detects the indoor temperature, which is the temperature of the indoor air that is the air-conditioning target area, outside the air conditioner 10 at a predetermined cycle. The external indoor temperature sensor 16 is provided outside the indoor unit 11 in the room that is the air-conditioning target area of the air conditioner 10. The external indoor temperature sensor 16 transmits the detected indoor temperature information to the air-conditioning control unit 118. The indoor temperature detected by the external indoor temperature sensor 16 is the externally detected indoor temperature that is the indoor temperature detected outside the indoor unit 11.

[0044] Figure 7 is a block diagram showing the functional configuration of the external indoor temperature sensor 16 according to Embodiment 1. The external indoor temperature sensor 16 includes an external sensor detection unit 161 and an external sensor communication unit 162.

[0045] The external sensor detection unit 161 detects the indoor temperature, which is the temperature of the indoor air that is the air-conditioning target area, at a predetermined cycle.

[0046] The external sensor communication unit 162 performs wireless communication with the wireless relay 17. The external sensor communication unit 162 transmits the indoor temperature information detected by the external sensor detection unit 161 to the wireless relay 17, and transmits the indoor temperature information to the indoor unit communication unit 117 of the indoor unit 11 via the wireless relay 17.

[0047] The wireless relay 17 is a communication relay that relays the communication between the external sensor communication unit 162 of the external indoor temperature sensor 16 and the indoor unit communication unit 117 of the indoor unit 11 by wireless communication. The wireless relay 17 receives the indoor temperature information transmitted from the external sensor communication unit 162 and transmits the indoor temperature information to the indoor unit communication unit 117. Note that a communication relay that relays the communication between the external sensor communication unit 162 of the external indoor temperature sensor 16 and the indoor unit communication unit 117 of the indoor unit 11 by wired communication may be used instead of the wireless relay 17.

[0048] Next, the operation of the air conditioning system 100 according to Embodiment 1 will be described. FIG. 8 is a flowchart showing the procedure of the operation of the air conditioning system 100 according to Embodiment 1.

[0049] In step S110, information on the first indoor temperature Ta, which is the indoor temperature detected by the internal room temperature sensor 113, is acquired by the operation determination unit 114. Specifically, the operation determination unit 114 acquires information on the first indoor temperature Ta, which is information on the indoor temperature detected by the internal room temperature sensor 113, from the internal room temperature sensor 113. The information on the first indoor temperature Ta can be paraphrased as information on the internally detected indoor temperature acquired by the internal room temperature sensor 113.

[0050] The internal room temperature sensor 113 detects the indoor temperature, which is the temperature of the indoor air that is the air conditioning target area, at a predetermined cycle. The internal room temperature sensor 113 transmits information on the first indoor temperature Ta, which is the detected indoor temperature information, to the air conditioning control unit 118. When the air conditioning control unit 118 receives the information on the first indoor temperature Ta transmitted from the internal room temperature sensor 113, the air conditioning control unit 118 transmits the information on the first indoor temperature Ta to the operation determination unit 114. The operation determination unit 114 acquires the information on the first indoor temperature Ta by receiving the information on the first indoor temperature Ta transmitted from the air conditioning control unit 118.

[0051] In step S120, it is determined whether the internal room temperature sensor 113 is normal. Specifically, the operation determination unit 114 determines whether the internal room temperature sensor 113 is normal. The operation determination unit 114 determines whether the internal room temperature sensor 113 is normal by comparing the first indoor temperature Ta indicated by the information on the first indoor temperature Ta acquired from the internal room temperature sensor 113 with a predetermined normal range of the indoor temperature.

[0052] The operation determination unit 114 compares, for example, the first indoor temperature Ta with the lower limit value of the normal range of the indoor temperature and the upper limit value of the normal range of the indoor temperature, and determines whether "the lower limit value of the normal range of the indoor temperature ≤ the first indoor temperature Ta ≤ the upper limit value of the normal range of the indoor temperature".

[0053] When the first indoor temperature Ta is a temperature outside the normal range of the indoor temperature, the operation determination unit 114 determines that the internal indoor temperature sensor 113 is not operating normally, and determines that the internal indoor temperature sensor 113 is not normal.

[0054] When the first indoor temperature Ta is a temperature within the normal range of the indoor temperature, the operation determination unit 114 determines that the internal indoor temperature sensor 113 is operating normally, and determines that the internal indoor temperature sensor 113 is normal. When the operation determination unit 114 determines that the internal indoor temperature sensor 113 is normal, it transmits the sensor normal determination information indicating that the internal indoor temperature sensor 113 is normal and the information of the first indoor temperature Ta to the heater control unit 115 and the air conditioner control unit 118. The heater control unit 115 and the air conditioner control unit 118 receive the sensor normal determination information and the information of the first indoor temperature Ta transmitted from the operation determination unit 114.

[0055] When it is determined that the internal indoor temperature sensor 113 is normal, it becomes Yes in step S120 and proceeds to step S130. When it is determined that the internal indoor temperature sensor 113 is not normal, it becomes No in step S120 and proceeds to step S150.

[0056] In step S130, it is determined whether the external heater on condition, which is the condition for turning on the external heater 15, is satisfied. Specifically, the heater control unit 115 determines whether the external heater on condition is satisfied.

[0057] The external heater on conditions include a plurality of detailed external heater on conditions such as the air conditioner 10 being in the heating operation, the air conditioner 10 being in the heating operation in the external heater heating operation mode, and the temperature difference between the set temperature of the heating operation and the indoor temperature being equal to or greater than a predetermined temperature difference set value. The detailed external heater on conditions are determined in advance and stored in the heater control unit 115. Note that the detailed external heater on conditions may be stored in the indoor unit storage unit 116.

[0058] Here, when proceeding from step S120 to step S130, the above-mentioned detailed external heater on condition of "the temperature difference between the set temperature of the heating operation and the indoor temperature being equal to or greater than a predetermined temperature difference set value" becomes the detailed external heater on condition of "the temperature difference between the set temperature of the heating operation and the first indoor temperature Ta being equal to or greater than a predetermined temperature difference set value".

[0059] The temperature difference set value is a temperature difference threshold value for the heater control unit 115 to determine whether the external heater on condition is satisfied by comparing the temperature difference between the set temperature of the heating operation and the indoor temperature.

[0060] The heater control unit 115 can determine whether the current air conditioner 10 is in the heating operation by obtaining information on the operation mode of the current air conditioner 10 from the air conditioning control unit 118. Further, the heater control unit 115 obtains information on the set temperature of the heating operation of the current air conditioner 10 from the air conditioning control unit 118, and calculates the temperature difference between the set temperature and the first indoor temperature Ta by comparing the information on the set temperature with the first indoor temperature Ta. Then, the heater control unit 115 can determine whether the temperature difference between the set temperature of the heating operation and the first indoor temperature Ta is equal to or greater than a predetermined temperature difference set value by comparing the calculated temperature difference with the temperature difference set value.

[0061] When the heater control unit 115 determines that all of a plurality of detailed external heater on conditions are satisfied, it determines that the external heater on condition is satisfied. When the heater control unit 115 determines that there is a detailed external heater on condition that is not satisfied among the plurality of detailed external heater on conditions, it determines that the external heater on condition is not satisfied.

[0062] When it is determined that the external heater on condition is satisfied, it becomes Yes in step S130 and proceeds to step S140. When it is determined that the external heater on condition is not satisfied, it becomes No in step S130 and proceeds to step S180.

[0063] In step S140, the external heater 15 is turned on. Specifically, the heater control unit 115 turns on the external heater 15 and operates the external heater 15. Thereby, a series of processes regarding the control of the external heater 15 is completed.

[0064] In step S180, the external heater 15 is turned off. Specifically, the heater control unit 115 turns off the external heater 15 and stops the external heater 15. If the external heater 15 is previously turned off, the control to turn off the external heater 15 is not performed, and a series of processes regarding the control of the external heater 15 is completed.

[0065] In step S150, information on the second indoor temperature Tb, which is the indoor temperature detected by the external indoor temperature sensor 16, is acquired by the operation determination unit 114. Specifically, the operation determination unit 114 acquires information on the second indoor temperature Tb, which is information on the indoor temperature detected by the external indoor temperature sensor 16, from the external indoor temperature sensor 16. The information on the second indoor temperature Tb can be paraphrased as information on the externally detected indoor temperature acquired by the external indoor temperature sensor 16.

[0066] The external indoor temperature sensor 16 detects the indoor temperature, which is the temperature of the indoor air, at a predetermined cycle. The external indoor temperature sensor 16 transmits the information on the second indoor temperature Tb, which is the information on the detected indoor temperature, to the air conditioning control unit 118 of the indoor unit 11 via the wireless relay 17. That is, the external sensor detection unit 161 of the external indoor temperature sensor 16 detects the indoor temperature in the room, which is the air conditioning target area, at a predetermined cycle. The external sensor communication unit 162 of the external indoor temperature sensor 16 transmits the information on the second indoor temperature Tb, which is the information on the indoor temperature detected by the external sensor detection unit 161, to the wireless relay 17.

[0067] When the wireless relay 17 receives the information on the second indoor temperature Tb transmitted from the external sensor communication unit 162, it transmits the information on the second indoor temperature Tb to the indoor unit communication unit 117 of the indoor unit 11. When the indoor unit communication unit 117 receives the information on the second indoor temperature Tb transmitted from the wireless relay 17, it transmits the information on the second indoor temperature Tb to the air conditioning control unit 118. When the air conditioning control unit 118 receives the information on the second indoor temperature Tb transmitted from the indoor unit communication unit 117, it transmits the information on the second indoor temperature Tb to the operation determination unit 114. The operation determination unit 114 acquires the information on the second indoor temperature Tb by receiving the information on the second indoor temperature Tb transmitted from the air conditioning control unit 118.

[0068] In step S160, it is determined whether the second indoor temperature Tb is a normal value. Specifically, the operation determination unit 114 determines whether the second indoor temperature Tb is a normal value. The operation determination unit 114 determines whether the second indoor temperature Tb is a normal value by comparing the second indoor temperature Tb indicated by the information on the second indoor temperature Tb acquired from the external indoor temperature sensor 16 with a predetermined normal range of the indoor temperature. The normal range of the indoor temperature is the same temperature range as the normal range of the indoor temperature in step S120 described above. Also, the determination of whether the second indoor temperature Tb is a normal value can be performed by the same method as in the case of step S120 described above.

[0069] When the second indoor temperature Tb is outside the normal range of the indoor temperature, the operation determination unit 114 determines that the second indoor temperature Tb is not a normal value.

[0070] When the second indoor temperature Tb is within the normal range of the indoor temperature, the operation determination unit 114 determines that the second indoor temperature Tb is a normal value. When the operation determination unit 114 determines that the second indoor temperature Tb is a normal value, it transmits temperature normal determination information indicating that the second indoor temperature Tb is normal and information on the second indoor temperature Tb to the heater control unit 115 and the air conditioner control unit 118. The heater control unit 115 and the air conditioner control unit 118 receive the temperature normal determination information and the information on the second indoor temperature Tb transmitted from the operation determination unit 114.

[0071] When it is determined that the second indoor temperature Tb is a normal value, that is, when it is determined that the second indoor temperature Tb indicated by the information on the second indoor temperature Tb is a normal value, it becomes Yes in step S160 and proceeds to step S170. When it is determined that the second indoor temperature Tb is not a normal value, that is, when it is determined that the second indoor temperature Tb indicated by the information on the second indoor temperature Tb is not a normal value, it becomes No in step S160 and proceeds to step S180.

[0072] In step S170, a corrected indoor temperature T_hosei in which the second indoor temperature Tb is corrected is calculated. Specifically, the heater control unit 115 corrects the second indoor temperature Tb indicated by the information on the second indoor temperature Tb to calculate the corrected indoor temperature T_hosei. The heater control unit 115 adds a correction value γ determined in advance based on the tendency of the error between the first indoor temperature Ta and the second indoor temperature Tb to the second indoor temperature Tb to calculate the corrected indoor temperature T_hosei.

[0073] The corrected indoor temperature T_hosei is the corrected indoor temperature obtained by correcting the indoor temperature indicated by the second indoor temperature Tb in consideration of the trend of the error between the first indoor temperature Ta and the second indoor temperature Tb. The corrected indoor temperature T_hosei is the indoor temperature information obtained by correcting the second indoor temperature Tb to be close to the first indoor temperature Ta at the same time when the indoor temperature is detected by the external indoor temperature sensor 16 when the internal indoor temperature sensor 113 is operating normally.

[0074] The correction value γ is the correction value added to the second indoor temperature Tb to calculate the corrected indoor temperature T_hosei by correcting the second indoor temperature Tb. The correction value γ is obtained by acquiring a plurality of combinations of indoor temperature information consisting of the indoor temperature detected by the external indoor temperature sensor 16 and the indoor temperature detected by the internal indoor temperature sensor 113 detected at the same time, and is predetermined based on the plurality of combinations of indoor temperature information and stored in the heater control unit 115. Note that the information on the correction value γ may be stored in the indoor unit storage unit 116.

[0075] For example, assume a case where the second indoor temperature Tb tends to be detected as a temperature lower than the first indoor temperature Ta by a temperature γ. In this case, the heater control unit 115 calculates the corrected indoor temperature T_hosei by performing the calculation of the second indoor temperature Tb + correction value γ in order to make the indoor temperature indicated by the second indoor temperature Tb close to the indoor temperature that should be indicated by the first indoor temperature Ta at the same time when the indoor temperature is detected by the external indoor temperature sensor 16 when the internal indoor temperature sensor 113 is operating normally.

[0076] After calculating the corrected indoor temperature T_hosei, the operation determination unit 114 transmits the corrected indoor temperature T_hosei to the heater control unit 115 and the air conditioning control unit 118. The heater control unit 115 and the air conditioning control unit 118 receive the corrected indoor temperature T_hosei transmitted from the operation determination unit 114.

[0077] After calculating the corrected room temperature T_hosei, the process proceeds to step S130. In step S130, as described above, it is determined whether the external heater ON condition, which is the condition for turning on the external heater 15, is satisfied. Here, when proceeding from step S170 to step S130, in the determination in step S130, in the process in step S130 described above, the information of the corrected room temperature T_hosei is used instead of the information of the first room temperature Ta.

[0078] For example, the detailed external heater ON condition of "the temperature difference between the set temperature of the heating operation and the room temperature is equal to or greater than a predetermined temperature difference set value" shown in step S130 described above is the detailed external heater ON condition of "the temperature difference between the set temperature of the heating operation and the corrected room temperature T_hosei is equal to or greater than a predetermined temperature difference set value".

[0079] The above-described series of processes are performed at a predetermined cycle during the operation of the air conditioner 10 determined in advance.

[0080] As described above, the air conditioning system 100 according to Embodiment 1 includes an internal room temperature sensor 113 built in the indoor unit 11 and an external room temperature sensor 16 as room temperature sensors for detecting the room temperature in the air conditioning target area. And the indoor unit 11 can acquire the information of the second room temperature Tb, which is the information of the room temperature detected by the external room temperature sensor 16, via the wireless relay device 17.

[0081] Thereby, the air conditioning system 100 can also acquire the room temperature from the external room temperature sensor 16 located at a position away from the indoor unit 11 indoors. And even when the internal room temperature sensor 113 built in the indoor unit 11 fails, the air conditioning system 100 can normally and appropriately control the operation of the external heater 15 using the information of the second room temperature Tb acquired from the external room temperature sensor 16.

[0082] Further, the air conditioning system 100 can suppress or eliminate the influence of the error between the room temperature detected inside the indoor unit 11 by the internal room temperature sensor 113 built in the indoor unit 11 and the room temperature detected outside the indoor unit 11 by the external room temperature sensor 16 by presetting a correction value γ for correcting the information of the second indoor temperature Tb to calculate the corrected indoor temperature T_hosei.

[0083] Therefore, according to the air conditioning system 100 according to the first embodiment, since it is provided with the external heater 15 for heating assistance and the external room temperature sensor 16 and is configured to be able to detect the room temperature not only inside the indoor unit 11 but also outside the indoor unit 11, even when the internal room temperature sensor 113 provided in the indoor unit 11 of the air conditioner 10 fails, the external heater 15 can be appropriately controlled, which has the effect of.

[0084] Second Embodiment. In the first embodiment described above, the case where one external room temperature sensor 16 is installed in the room that is the air conditioning target area has been described. In the second embodiment, a case where a plurality of external room temperature sensors 16 are installed in the room that is the air conditioning target area and the operation determination unit 114 acquires the information of the second indoor temperature Tb, which is the information of the externally detected room temperature, from the external room temperature sensor 16 with the highest priority will be described.

[0085] FIG. 9 is a functional block diagram showing the functional configuration of the air conditioning system 100a according to Embodiment 2. The air conditioning system 100a according to Embodiment 2 is different from the air conditioning system 100 according to Embodiment 1 described above in that it includes a plurality of external indoor temperature sensors 16 that detect the indoor temperature, which is the temperature of the indoor air. That is, the air conditioning system 100a according to Embodiment 2 includes an air conditioner 10 including an indoor unit 11 and an outdoor unit 12, a refrigerant pipe 14, a remote controller 13, an external heater 15, external indoor temperature sensors 16a, 16b, and 16c that are the external indoor temperature sensors 16, and a wireless relay 17. In FIG. 9, the same components as those in the case of Embodiment 1 described above are denoted by the same reference numerals as those in Embodiment 1.

[0086] The external indoor temperature sensors 16a, 16b, and 16c have the same configuration and function as the external indoor temperature sensor 16 of the air conditioning system 100 according to Embodiment 1 described above. That is, the external indoor temperature sensors 16a, 16b, and 16c are arranged outside the indoor unit 11 of the air conditioner 10 in the room, similarly to the external indoor temperature sensor 16 of the air conditioning system 100 according to Embodiment 1 described above. And the external indoor temperature sensors 16a, 16b, and 16c detect the second indoor temperature Tb, which is the indoor temperature, outside the air conditioner 10 at a predetermined cycle, and transmit the information of the second indoor temperature Tb to the indoor unit 11, similarly to the external indoor temperature sensor 16 of the air conditioning system 100 according to Embodiment 1 described above.

[0087] Next, the operation of the air conditioning system 100a according to Embodiment 2 will be described. FIG. 10 is a flowchart showing the procedure of the operation of the air conditioning system 100a according to Embodiment 2. In the flowchart shown in FIG. 10, the same step numbers are assigned to the same steps as those in the flowchart shown in FIG. 8.

[0088] First, steps S110 and S120 described in the flowchart of FIG. 8 of the above-described Embodiment 1 are performed.

[0089] When it is determined that the internal room temperature sensor 113 is normal, Yes is obtained in step S120, and the process proceeds to step S130. When it is determined that the internal room temperature sensor 113 is not normal, No is obtained in step S120, and the process proceeds to step S210.

[0090] In step S210, among the plurality of external room temperature sensors 16, the priority number of the external room temperature sensor 16 from which the operation determination unit 114 acquires the second room temperature Tbk is set to 1. Specifically, the operation determination unit 114 sets the priority number k of the external room temperature sensor 16 from which the second room temperature Tbk is acquired among the plurality of external room temperature sensors 16 to 1. Then, the process proceeds to step S220.

[0091] Each of the plurality of external room temperature sensors 16 constituting the air conditioning system 100a is given a priority P in advance. The priority P is the order in which the operation determination unit 114 acquires the second room temperature Tbk from the external room temperature sensor 16 among the plurality of external room temperature sensors 16 when No is obtained in step S120 and it is determined that the internal room temperature sensor 113 is not normal. Here, it is assumed that the external room temperature sensor 16a has the highest priority P, and the priority P decreases in the order of the external room temperature sensor 16b and the external room temperature sensor 16c.

[0092] The priority P for the plurality of external room temperature sensors 16 is determined in advance and stored in the operation determination unit 114. Note that the priority P for the plurality of external room temperature sensors 16 may be stored in the indoor unit storage unit 116. In addition, the priority P for the plurality of external room temperature sensors 16 stored in the operation determination unit 114 can be changed using the remote controller 13.

[0093] The priority number k is a number indicating the priority P of each of the plurality of external room temperature sensors 16. A priority number from 1 to n is set for each of the plurality of external room temperature sensors 16. n is the number of external room temperature sensors 16 that make up the air conditioning system 100a. Here, for the three external room temperature sensors 16, namely the external room temperature sensor 16a, the external room temperature sensor 16b, and the external room temperature sensor 16c, the priority numbers 1 to 3 are set in descending order of priority P. That is, the priority number 1 is set for the external room temperature sensor 16a. The priority number 2 is set for the external room temperature sensor 16b. The priority number 3 is set for the external room temperature sensor 16c. order That is, the priority number 1 is set for the external room temperature sensor 16a. The priority number 2 is set for the external room temperature sensor 16b. The priority number 3 is set for the external room temperature sensor 16c.

[0094] The priority number k for the plurality of external room temperature sensors 16 is determined in advance and stored in the operation determination unit 114. Note that the priority number k for the plurality of external room temperature sensors 16 may be stored in the indoor unit storage unit 116. Also, the priority number k for the plurality of external room temperature sensors 16 stored in the operation determination unit 114 can be changed in accordance with the change in the priority P when changing the priority P using the remote controller 13 as described above.

[0095] The second room temperature Tbk is the second room temperature Tb detected by the external room temperature sensor 16 whose priority number is k.

[0096] In step S220, among the information on the second indoor temperature Tb detected by the plurality of external indoor temperature sensors 16, the information on the second indoor temperature Tbk from the external indoor temperature sensor 16 with the priority number k is acquired. Specifically, the operation determination unit 114 acquires the information on the second indoor temperature Tbk, which is the information on the second indoor temperature Tb, from the external indoor temperature sensor 16 with the priority number k among the information on the second indoor temperature Tb detected by the plurality of external indoor temperature sensors 16. When proceeding from step S210 to step S220, since 1 is set for k in step S210, the operation determination unit 114 acquires the information on the second indoor temperature Tb1 from the external indoor temperature sensor 16a, which is the external indoor temperature sensor 16 with the priority number = 1. Then, it proceeds to step S230.

[0097] In step S230, it is determined whether the second indoor temperature Tbk is a normal value. Specifically, the operation determination unit 114 determines whether the second indoor temperature Tbk is a normal value. When proceeding in the order of step S210 → step S220 → step S230, since 1 is set for k in step S210, the operation determination unit 114 determines whether the indoor temperature indicated by the second indoor temperature Tb1 is a normal value.

[0098] The operation determination unit 114 determines whether the second indoor temperature Tbk is a normal value by comparing the indoor temperature indicated by the information on the second indoor temperature Tbk acquired from the external indoor temperature sensor 16 with a predetermined normal range of the indoor temperature. The normal range of the indoor temperature is the same temperature range as the normal range of the indoor temperature in steps S120 and S160 described in Embodiment 1. Also, the determination of whether the second indoor temperature Tbk is a normal value can be performed in the same manner as in the case of step S120 described above.

[0099] When it is determined that the second indoor temperature Tbk is a normal value, that is, when it is determined that the second indoor temperature Tbk indicated in the information of the second indoor temperature Tbk is a normal value, Yes is obtained in step S230, and the process proceeds to step S240. When it is determined that the second indoor temperature Tbk is not a normal value, that is, when it is determined that the second indoor temperature Tbk indicated in the information of the second indoor temperature Tbk is not a normal value, No is obtained in step S230, and the process proceeds to step S250.

[0100] In step S240, the second indoor temperature Tb used for controlling the external heater 15 is determined to be the second indoor temperature Tbk. Specifically, the operation determination unit 114 determines the second indoor temperature Tb used for controlling the external heater 15 to be the second indoor temperature Tbk, and sets the second indoor temperature Tbk = the second indoor temperature Tb. When proceeding in the order of step S210 → step S220 → step S230 → step S240, since 1 is set for k in step S210, the operation determination unit 114 determines the second indoor temperature Tb to be the second indoor temperature Tb1. Then, the process proceeds to step S170.

[0101] In step S250, the priority number k of the second indoor temperature Tbk is incremented by only 1, and the priority number k is set to k = k + 1. That is, among the plurality of external indoor temperature sensors 16, the priority number of the external indoor temperature sensor 16 from which the operation determination unit 114 acquires the information of the second indoor temperature Tbk is incremented by 1 and set. Specifically, the operation determination unit 114 increments by 1 and sets the priority number of the external indoor temperature sensor 16 from which the operation determination unit 114 acquires the information of the second indoor temperature Tbk among the plurality of external indoor temperature sensors 16.

[0102] That is, when it is determined that the second indoor temperature Tbk acquired from the external indoor temperature sensor 16 with a higher priority among the plurality of external indoor temperature sensors 16 is abnormal, the operation determination unit 114 changes the priority number k of the second indoor temperature Tbk so as to acquire the second indoor temperature Tbk from the external indoor temperature sensor 16 with a lower priority. Then, the process proceeds to step S260.

[0103] In step S260, it is determined whether the value of the priority number k set in step S250 is less than or equal to n, which is the number of external room temperature sensors 16 that make up the air conditioning system 100a. Specifically, the operation determination unit 114 determines whether the value of k = k + 1 newly set in step S250 is less than or equal to n, which is the number of external room temperature sensors 16 that make up the air conditioning system 100a.

[0104] If it is determined that the value of k is less than or equal to n, then Yes in step S260, and return to step S220. If it is determined that the value of k is greater than n, then No in step S260, and proceed to step S180.

[0105] In step S130, step S140, and step S180, the processes described in the above-described Embodiment 1 are performed.

[0106] As described above, since the air conditioning system 100a according to Embodiment 2 has the same configuration and functions as the air conditioning system 100 according to the above-described Embodiment 1, it has the same effects as the air conditioning system 100 according to Embodiment 1.

[0107] In addition, the air conditioning system 100a according to Embodiment 2 is configured such that when there are a plurality of external room temperature sensors 16, a priority can be set for each of the plurality of external room temperature sensors 16. Then, when it is determined that the second room temperature Tbk obtained from the external room temperature sensor 16 with the highest priority among the plurality of external room temperature sensors 16 is abnormal, the operation determination unit 114 can obtain the second room temperature Tbk from the external room temperature sensor 16 with the lowest priority.

[0108] As a result, in the air conditioning system 100a, it is possible to prevent a plurality of second room temperatures Tb obtained from the plurality of external room temperature sensors 16 from competing in the indoor unit 11 and interfering with the control of the external heater 15 in the indoor unit 11, and to appropriately control the external heater 15. And in the air conditioning system 100a configured in this way, if there is an external room temperature sensor 16 that can detect a normal value among the plurality of external room temperature sensors 16 that detect the room temperature in the air conditioning system 100a, the operation of the external heater 15 can be normally controlled without turning off the external heater 15.

[0109] Subsequently, the hardware configuration of each of the control units 80 according to the first embodiment will be described. The control unit 80 according to the first embodiment corresponds to each of the air conditioning control unit 118 of the indoor unit 11 of the air conditioner 10, the remote control unit 135 of the remote control 13, and the external heater control unit 153 of the external heater 15 according to the first embodiment. Each function of the control unit 80 according to the first embodiment is realized by a processing circuit. The processing circuit may be dedicated hardware or a processing device that executes a program stored in a storage device.

[0110] When the processing circuit is dedicated hardware, the processing circuit corresponds to a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit, a field programmable gate array, or a combination thereof. FIG. 11 is a diagram showing a configuration in which each function of the control unit 80 according to the first embodiment is realized by hardware. A logic circuit 81a for realizing the functions of the control unit 80 is incorporated in the processing circuit 81.

[0111] When the processing circuit 81 is a processing device, the functions of the control unit 80 are realized by software, firmware, or a combination of software and firmware.

[0112] FIG. 12 is a diagram showing a configuration in which each function of the control unit 80 according to Embodiment 1 is realized by software. The processing circuit 81 includes a processor 811 that executes a program 81b, a random access memory 812 used by the processor 811 as a work area, and a storage device 813 that stores the program 81b. By expanding and executing the program 81b stored in the storage device 813 on the random access memory 812 by the processor 811, the functions of the control unit 80 are realized. Software or firmware is described in a programming language and stored in the storage device 813. The processor 811 can be exemplified by a central processing unit, but is not limited thereto. As the storage device 813, a semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Memory), or an EEPROM (registered trademark) (Electrically Erasable Programmable Read Only Memory) can be applied. The semiconductor memory may be a non-volatile memory or a volatile memory. In addition to the semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD (Digital Versatile Disc) can be applied as the storage device 813. Note that the processor 811 may output and store data such as calculation results in the storage device 813, or may store the data in an auxiliary storage device (not shown) via the random access memory 812. By integrating the processor 811, the random access memory 812, and the storage device 813 on one chip, the functions of the control unit 80 can be realized by a microcomputer.

[0113] The processing circuit 81 realizes the functions of the control unit 80 by reading and executing the program 81b stored in the storage device 813. The program 81b can also be said to cause a computer to execute procedures and methods for realizing the functions of the control unit 80.

[0114] Note that the processing circuit 81 may implement part of the functions of the control unit 80 with dedicated hardware and implement part of the functions of the control unit 80 with software or firmware.

[0115] In this way, the processing circuit 81 can implement each of the above functions by hardware, software, firmware, or a combination thereof.

[0116] The configurations shown in the above embodiments are examples, and it is possible to combine them with other known technologies, combine the embodiments with each other, and omit or change part of the configuration without departing from the gist.

Explanation of Reference Numerals

[0117] 1 Compressor, 2 Outdoor heat exchanger, 3 Expansion valve, 4 Indoor heat exchanger, 5 Four-way valve, 6 Outside air temperature sensor, 10 Air conditioner, 11 Indoor unit, 12 Outdoor unit, 13 Remote controller, 14 Refrigerant pipe, 15 External heater, 16, 16a, 16b, 16c External indoor temperature sensor, 17 Wireless repeater, 80 Control unit, 81 Processing circuit, 81a Logic circuit, 81b Program, 100, 100a Air conditioning system, 111 Indoor unit air conditioning section, 112 Indoor unit blower, 113 Internal indoor temperature sensor, 114 Operation determination section, 115 Heater control section, 116 Indoor unit storage section, 117 Indoor unit communication section, 118 Air conditioning control section, 131 Remote controller operation section, 132 Remote controller display section, 133 Remote controller storage section, 134 Remote controller communication section, 135 Remote controller control section, 151 Heater section, 152 External heater communication section, 153 External heater control section, 161 External sensor detection section, 162 External sensor communication section, 811 Processor, 812 Random access memory, 813 Storage device.

Claims

1. An air conditioner having a refrigeration cycle in which an indoor unit provided in a room to be air-conditioned and an outdoor unit provided outdoors are connected by a refrigerant pipe through which refrigerant circulates, An external heater provided in the room, An external room temperature detection unit provided outside the indoor unit in the room and detecting an external detected room temperature which is the room temperature in the room detected outside the indoor unit, A communication relay device for relaying communication between the external room temperature detection unit and the indoor unit, comprising, The indoor unit includes, An internal room temperature detection unit for detecting an internal detected room temperature which is the room temperature in the room detected in the indoor unit, An operation determination unit for determining whether the internal room temperature detection unit is operating normally, When it is determined that the internal room temperature detection unit is operating normally, the external heater is controlled based on the internal detected room temperature, and when it is determined that the internal room temperature detection unit is not operating normally, the external heater is controlled based on the external detected room temperature acquired from the external room temperature detection unit via the communication relay device. A heater control unit, having, When the operation determination unit determines that the internal room temperature detection unit is not operating normally, it determines whether the external room temperature detection unit is operating normally. When the heater control unit determines that the internal room temperature detection unit is not operating normally and further determines that the external room temperature detection unit is operating normally, the external heater is controlled based on a corrected room temperature corrected based on a predetermined correction value of the external detected room temperature. An air conditioning system.

2. The operation determination unit, When the internal detected room temperature is within a predetermined normal range of the room temperature, it determines that the internal room temperature detection unit is operating normally. When the internal detected room temperature is outside the normal range of the room temperature, it is determined that the internal room temperature detection unit is not operating normally. The air conditioning system according to claim 1.

3. The correction value is a value determined in advance based on the combined information of the room temperature consisting of the room temperature detected by the external room temperature detection unit and the room temperature detected by the internal room temperature detection unit, both detected at the same time. The air conditioning system according to claim 1 or 2.

4. It includes a plurality of the external room temperature detection units in which the priority order of the order in which the external detected room temperature is acquired in the operation determination unit is set in advance. When it is determined that the external detected room temperature acquired from the external room temperature detection unit with the higher priority among the plurality of external room temperature detection units is abnormal, the operation determination unit acquires the external detected room temperature from the external room temperature detection unit with the lower priority. The air conditioning system according to any one of claims 1 to 3.

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