JP2021050850A - Air conditioner - Google Patents

Abstract

To provide an air conditioner capable of air-conditioning operation suitable for an installation environment.SOLUTION: An air conditioner comprises a compressor, a room temperature sensor and a control section. The control section performs thermostat on/off operation which controls the operation of the compressor with a predetermined thermostat off determination temperature as a threshold on the basis of a room temperature measured with the room temperature sensor. When performing the thermostat on/off operation, the control section sets a shifted temperature obtained by shifting a set temperature by predetermined shifting degrees as the thermostat off determination temperature and determines the shifting degrees on the basis of a record of room temperatures through the past thermostat on/off operation.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to an air conditioner.

Conventionally, various types of air conditioners of this type are known. For example, "thermo on / off operation" that controls ON / OFF of the compressor based on the difference between the room temperature detected on the indoor unit side and the set temperature set by the remote controller and maintains the room temperature near the set temperature. An air conditioner to be executed is known (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-21656

However, in recent years, the number of highly airtight and highly insulated houses has increased. In such a house, the temperature change when the air conditioning operation is stopped is slower than that in a normal house. When the thermo-on / off operation is executed by the air conditioner installed in the house, the temperature change in the thermo-off state is gradual, so that the room temperature can be easily maintained in the temperature range away from the set temperature, and the air conditioner can easily maintain the room temperature. The air conditioning operation may not be suitable for the installation environment. There is still room for improvement in performing air conditioning operation suitable for the installation environment, including the air conditioner disclosed in Patent Document 1.

Therefore, an object of the present disclosure is to provide an air conditioner capable of performing air conditioning operation more suitable for the installation environment in order to solve the above problems.

The air conditioner of one aspect of the present disclosure includes a compressor that compresses the refrigerant circulating in the refrigeration cycle, a room temperature sensor that measures the room temperature, and a control unit that controls the operation of the air conditioner. Based on the room temperature measured by the room temperature sensor, the thermo-on / off operation for controlling the operation of the compressor is executed with a predetermined thermo-off determination temperature as a threshold, and the control unit sets a predetermined shift temperature value with respect to the set temperature. The thermo-on / off operation is executed with the shifted temperature as the thermo-off determination temperature, and the shift temperature value is determined based on the actual room temperature in the past thermo-on / off operation.

According to the air conditioner of the present disclosure, it is possible to perform air conditioning operation more suitable for the installation environment.

The figure which shows the air conditioner and the air conditioner system in an embodiment. Block diagram showing the configuration of an air conditioner Graph showing an example of room temperature temperature transition during thermo-on / off operation in heating operation (before updating shift temperature value) Graph showing an example of room temperature temperature transition during thermo-on / off operation in heating operation (after updating shift temperature value) Graph showing an example of room temperature temperature transition during thermo-on / off operation in cooling operation (before updating shift temperature value) Graph showing an example of room temperature temperature transition during thermo-on / off operation in cooling operation (after updating shift temperature value) Flowchart on how to update the shift temperature value during thermo-on / off operation in heating operation A graph showing an example of the temperature transition of room temperature when the thermo-on / off operation in the heating operation is executed. Flowchart on how to update the shift temperature value during thermo-on / off operation in cooling operation A graph showing an example of the temperature transition of room temperature when the thermo-on / off operation in the cooling operation is executed.

The first invention includes a compressor for compressing a refrigerant circulating in a refrigeration cycle, a room temperature sensor for measuring room temperature, and a control unit for controlling the operation of an air conditioner, and the control unit measures with a room temperature sensor. Based on the room temperature to be set, a thermo-on / off operation for controlling the operation of the compressor is executed with a predetermined thermo-off determination temperature as a threshold, and the control unit thermo-off the temperature obtained by shifting the predetermined shift temperature value with respect to the set temperature. It is an air conditioner that executes thermo-on / off operation as the determination temperature and determines the shift temperature value based on the actual room temperature in the past thermo-on / off operation.

According to such a configuration, the shift temperature value for determining the thermo-off determination temperature is determined based on the actual room temperature in the past thermo-on / off operation, as compared with the case where the shift temperature value is set to a fixed value. Therefore, the operation more suitable for the installation environment of the air conditioner becomes possible.

In the second invention, in particular, the control unit in the first invention determines the shift temperature value based on the difference between the maximum or minimum value of the room temperature in the past thermo-on / off operation and the set temperature. , Determine the shift temperature value.

With such a configuration, it is possible to realize thermo-on / off operation in which the room temperature is maintained in a temperature range close to the set temperature.

In the third invention, in particular, during the heating operation in the second invention, the shift temperature value is set to a positive value, and in the control unit, the average value of the minimum values of the room temperature X times in the past is the set temperature. On the other hand, when it is determined that the temperature is higher than the first temperature range, the absolute value of the shift temperature value is updated to be small.

According to such a configuration, the thermo-on / off operation that maintains the room temperature in a temperature zone closer to the set temperature is possible by updating the shift temperature value to be smaller and bringing the thermo-off judgment temperature closer to the set temperature. It becomes.

In the fourth invention, the shift temperature value is set to a negative value, especially during the cooling operation in the second invention or the third invention, and the control unit is the average of the maximum values of the room temperature Y times in the past. When it is determined that the value is lower than the second temperature range with respect to the set temperature, the absolute value of the shift temperature value is updated to be small.

According to such a configuration, the thermo-on / off operation that maintains the room temperature in a temperature zone closer to the set temperature is possible by updating the shift temperature value to be smaller and bringing the thermo-off judgment temperature closer to the set temperature. It becomes.

In the fifth invention, in particular, the control unit in any one of the first to fourth inventions shifts based on the duration of the past Z thermo-on states when determining the shift temperature value. Determine the temperature value.

According to such a configuration, by determining the shift temperature value based on the duration of the thermo-on state, the thermo-on / off operation for maintaining the room temperature in a temperature zone closer to the set temperature becomes possible.

In the sixth invention, in particular, the control unit in the fifth invention reduces the absolute value of the shift temperature value when it is determined that the average value of the duration of the thermo-on state of the past Z times is within a predetermined time. Update as

According to such a configuration, the thermo-on / off operation is performed to maintain the room temperature in a temperature zone closer to the set temperature by updating the shift temperature value to be smaller and bringing the thermo-off determination temperature closer to the set temperature. Is possible.

In the seventh invention, in particular, the maximum value and the minimum value are determined with respect to the absolute value of the shift temperature value in any one of the first to sixth inventions.

According to such a configuration, it is possible to prevent the shift temperature value from being excessively increased or decreased.

In the eighth invention, in particular, the maximum value with respect to the absolute value of the shift temperature value in the seventh invention is a fixed value, and the minimum value is a variable value.

According to such a configuration, by setting the minimum value to a variable value, it is possible to operate more suitable for the installation environment of the air conditioner, such as changing the minimum value according to the performance of the house in the installation environment of the air conditioner. It becomes.

In the ninth invention, in particular, the minimum value regarding the absolute value of the shift temperature value in the eighth invention is determined according to the house cold / heat holding capacity at the place where the air conditioner is installed.

According to such a configuration, by changing the minimum value according to the cold / heat holding capacity of the house, it is possible to operate the air conditioner more suitable for the installation environment.

(Embodiment)
Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an air conditioner and an air conditioner system according to an embodiment.

The air conditioning system shown in FIG. 1 is provided with an air conditioner group 2 and a server 4.

The air conditioner group 2 is composed of a plurality of air conditioners 3, and each of the plurality of air conditioners 3 is installed at a different place. In this embodiment, a method of extracting one air conditioner 3A from a plurality of air conditioners 3 and controlling the operation of the air conditioner 3A will be described.

The server 4 is a server that manages information about the air conditioner group 2. The server 4 is, for example, a management server of a manufacturing company of the air conditioner 3. The server 4 may be an application server that connects to an application so as to provide a service related to the air conditioner 3 via the Internet.

In the air conditioning system shown in FIG. 1, data is transmitted and received between the air conditioner group 2, the server 4, and the external information source 6 via the Internet. Various communication means may be used to send and receive data. The communication means is, for example, a communication means such as a wired LAN, a wireless LAN, or a communication using a communication network of a mobile information terminal carrier. For example, the air conditioner 3 can communicate with the Internet via a Wi-Fi® router.

Next, the configuration of the air conditioner 3A will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the air conditioner 3A.

As shown in FIG. 2, the air conditioner 3A includes an indoor unit 8, an outdoor unit 10, and a refrigeration cycle 12.

The indoor unit 8 and the outdoor unit 10 are connected by a refrigeration cycle 12. The refrigeration cycle 12 is composed of a plurality of pipes or the like that circulate the refrigerant between the indoor unit 8 and the outdoor unit 10. The direction of the refrigerant flowing through the refrigeration cycle 12 is opposite between the cooling operation and the dehumidifying operation and the heating operation.

The indoor unit 8 includes a control unit 14, a room temperature sensor 16, and a storage unit 18.

The control unit 14 is a member that controls the operation of the air conditioner 3A. The control unit 14 includes a CPU and the like, and the CPU executes a program (software) to realize a predetermined function. The control unit 14 may include a processor composed of a dedicated electronic circuit designed to realize a predetermined function instead of the CPU.

As shown by the dotted line in FIG. 2, the control unit 14 is electrically connected to the room temperature sensor 16 and the storage unit 18 inside the indoor unit 8.

The room temperature sensor 16 is a temperature sensor that measures the room temperature at the place where the indoor unit 8 is installed. The room temperature sensor 16 is provided at the suction port of the indoor unit 8, for example, and measures the temperature of the air sucked into the indoor unit 8 as the room temperature. The position of the room temperature sensor 16 is not limited to the inside of the indoor unit 8, and may be any position as long as the room temperature can be measured, such as the outside of the indoor unit 8.

The storage unit 18 stores various information related to the operation of the air conditioner 3A as a storage medium. The storage unit 18 includes, for example, a volatile memory (not shown) that temporarily stores information and a non-volatile memory (not shown) that permanently stores information. The volatile memory may be, for example, a buffer memory such as a DRAM (Dynamic Random Access Memory). The non-volatile memory may be, for example, a flash memory.

The control unit 14 further communicates between the server 4 described above and the remote controller 15.

The remote controller 15 is a controller for remotely setting the air conditioner 3A. The remote controller 15 can be used to set operation modes such as cooling operation, dehumidifying operation, and heating operation, as well as set temperature and wind direction.

As shown in FIG. 2, the outdoor unit 10 includes a compressor 20. The compressor 20 is a device that compresses the refrigerant flowing through the refrigeration cycle 12.

The control unit 14 is electrically connected to the compressor 20. The control unit 14 controls the drive frequency of the compressor 20 to control the operation of the compressor 20.

In the air conditioner 3A having the above-described configuration, when the user operates the remote controller 15 to set the air conditioner 3A, a signal instructing operation according to the setting is transmitted from the remote controller 15 to the indoor unit 8. .. The signal is stored in the storage unit 18, and the control unit 14 controls the compressor 20 to drive at a predetermined frequency based on the signal. As a result, the refrigerant is circulated in the refrigeration cycle 12, and air conditioning operations such as cooling operation and heating operation are executed.

The control unit 14 of the embodiment executes a thermo-on / off operation that controls the operation of the compressor 20 with a predetermined thermo-off determination temperature as a threshold value based on the room temperature measured by the room temperature sensor 16. The thermo-on / off operation executed by the control unit 14 of the embodiment will be described with reference to FIGS. 3A, 3B, 4A, and 4B.

3A and 3B are graphs showing an example of the temperature transition of the room temperature during the thermo-on / off operation in the heating operation. 4A and 4B are graphs showing an example of the temperature transition of the room temperature during the thermo-on / off operation in the cooling operation. In FIGS. 3A, 3B, 4A, and 4B, the horizontal axis represents the operating time and the vertical axis represents the temperature.

In FIGS. 3A, 3B, 4A, and 4B, the room temperature T1 is the temperature measured by the room temperature sensor 16. The set temperature T2 is an air conditioning temperature set by the remote controller 15. The thermo-off determination temperature T3 is a threshold temperature for determining switching between the thermo-on state and the thermo-off state. The shift temperature value ΔT is a difference temperature of the thermo-off determination temperature T3 with respect to the set temperature T2, and is a temperature set to determine the thermo-off determination temperature T3 as a relative temperature with respect to the set temperature T2.

Information about the room temperature T1 is transmitted from the room temperature sensor 16 to the storage unit 18 and read out by the control unit 14. Information about the set temperature T2 is transmitted from the remote controller 15 to the storage unit 18 and read out by the control unit 14. The information regarding the shift temperature value ΔT is stored in advance in the storage unit 18, and is read out by the control unit 14. If the set temperature T2 and the shift temperature value ΔT are stored in the storage unit 18, the thermo-off determination temperature T3 does not have to be stored in the storage unit 18. The shift temperature value ΔT can be updated by the control unit 14 newly writing to the storage unit 18.

As shown in FIG. 3A, when the room temperature T1 is lower than the thermo-off determination temperature T3 in the presence of the thermo-off determination temperature T3 during the heating operation, the compressor 20 is operated at a predetermined drive frequency to perform the heating operation. (Thermo-on state). This raises the room temperature T1. After that, when the room temperature T1 is higher than the thermo-off determination temperature T3 for a predetermined time (for example, 3 minutes) or more, the operation of the compressor 20 is stopped (thermo-off state). This lowers the room temperature T1. After that, when the room temperature T1 becomes lower than the thermo-off determination temperature T3 after the thermo-off state continues for a predetermined time (for example, 3 minutes) or more, the operation of the compressor 20 is restarted and the thermo-off state is returned. In this way, by alternately repeating the thermo-on state and the thermo-off state with the thermo-off determination temperature T3 as the threshold temperature, the "thermo-on / off operation" for maintaining the room temperature T1 in a certain temperature range is executed.

In recent years, the number of highly airtight and highly insulated houses has increased. In the example shown in FIG. 3A, in the thermo-off state in which the operation of the compressor 20 is stopped, the rate at which the room temperature T1 decreases becomes slow, and the temperature zone in which the room temperature T1 is maintained becomes excessively higher than the set temperature T2. Tend. In response to this, the control unit 14 of the embodiment controls to update the shift temperature value ΔT according to the actual result of the room temperature T1 in the past thermo-on / off operation.

As shown in FIG. 3A, when it is detected that the room temperature T1 (the average value of the minimum values) measured in the thermo-on / off operation is higher than the set temperature T2 by a predetermined temperature range or more, the shift is performed as shown in FIG. 3B. The shift temperature value ΔT is updated so that the absolute value of the temperature value ΔT becomes smaller. As a result, the thermo-off determination temperature T3 becomes a value close to the set temperature T2, and the temperature zone of the room temperature T1 maintained by the thermo-on / off operation can be brought close to the set temperature T2.

Next, the cooling operation will be described with reference to FIGS. 4A and 4B. As shown in FIG. 4A, similarly in the cooling operation, in a highly airtight and highly insulated house, the room temperature T1 rises slowly in the thermo-off state, and the temperature zone in which the room temperature T1 is maintained is the set temperature T2. Tends to be excessively lower than. When it is detected that the room temperature T1 (the average value of the maximum values) measured during the thermo-on / off operation is lower than the set temperature T2 by a predetermined temperature range or more, the absolute value of the shift temperature value ΔT becomes as shown in FIG. 4B. The shift temperature value ΔT is updated so that it becomes smaller. As a result, the thermo-off determination temperature T3 becomes a value close to the set temperature T2, and the temperature zone of the room temperature T1 maintained by the thermo-on / off operation can be brought close to the set temperature T2.

A specific method for updating the shift temperature value ΔT described above will be described with reference to FIGS. 5 to 8. 5 and 6 are flowcharts and diagrams relating to heating operation, and FIGS. 7 and 8 are flowcharts and diagrams relating to cooling operation. The control shown in FIGS. 5 to 8 is executed by the control unit 14. The control unit 14 executes each step defined in the flowcharts of FIGS. 5 and 7 while reading the temporary or permanent information stored in the storage unit 18.

The control unit 14 repeats the process of the flowchart of FIG. 5, for example, at a predetermined cycle. Similarly, the control unit 14 repeats the processing of the flowchart of FIG. 7, for example, at the same cycle. The cycle may be any cycle.

First, a method of updating the shift temperature value ΔT in the heating operation will be described with reference to FIGS. 5 and 6.

As shown in FIG. 5, the control unit 14 determines whether or not the heating operation is in progress (S1). The control unit 14 determines whether or not the heating operation is in progress based on, for example, a signal transmitted from the remote controller 15 to the storage unit 18. When it is determined that the heating operation is not in progress (NO in S1), the flow is terminated.

When it is determined that the heating is in progress (YES in S1), the control unit 14 determines whether or not the count is 0 (S2). The count is information stored in the storage unit 18, and the initial value is set to 0. When step S2 is executed for the first time, it is determined that the count is 0 (YES in S2), and the process proceeds to step S3.

The control unit 14 initializes the shift temperature value ΔT (S3). Specifically, the control unit 14 sets the shift temperature value ΔT to + 2.0 ° C.

The control unit 14 determines whether or not it is in the thermo-off state (S4). For example, when the compressor 20 is being operated, the control unit 14 determines that the compressor 20 is not in the thermo-off state (that is, the thermo-on state) (NO in S4), and proceeds to step S5. On the other hand, when the operation of the compressor 20 is stopped, the control unit 14 determines that the thermo-off state (YES in S4), and proceeds to step S8. When step S4 is executed for the first time, it is determined that the compressor 20 is not in the thermo-off state because it is in the thermo-on state in which the compressor 20 is being operated (NO in S4), and the process proceeds to step S5.

The control unit 14 determines whether or not the state of “room temperature T1-set temperature T2 ≧ shift temperature value ΔT” has continued for a predetermined time (S5). The predetermined time is set to, for example, 3 minutes. Since the set temperature T2 + shift temperature value ΔT is the thermo-off determination temperature T3, step S5 is, in other words, a step of determining whether or not the state of room temperature T1 ≧ thermo-off determination temperature T3 has continued for a predetermined time (see FIG. 3A). .. When step S5 is executed for the first time, the shift temperature value ΔT is + 2.0 ° C., which is the initial value set in step S3.

Even if the room temperature T1 ≥ the thermo-off determination temperature T3, if the state does not continue for at least a predetermined time, NO is determined in step S5, the flow is terminated, and the process is restarted from step S1. That is, the thermo-on state is maintained until the state of room temperature T1 ≧ thermo-off determination temperature T3 continues for a predetermined time. On the other hand, if the state continues for a predetermined time, it is determined that the state of "room temperature T1-thermo-off determination temperature T3 ≥ shift temperature value ΔT" has continued for a predetermined time (YES in S5), and the process proceeds to step S6.

The control unit 14 is set to the thermo-off state (S6). Specifically, the control unit 14 switches from the thermo-on state to the thermo-off state by controlling the compressor 20 to stop the operation.

The control unit 14 determines whether or not the count is 3 times or more (S7). Since the initial value of the count is 0 when step S7 is executed for the first time, it is determined that the count is not three or more times (NO in S7), the flow is terminated, and step S1 is restarted.

Next, when step S4 is executed, it is determined that the thermo-off state (YES in S4), and the process proceeds to step S8.

The control unit 14 determines whether or not a predetermined time has elapsed from the stop of the compressor 20 (S8). The predetermined time is set to, for example, 3 minutes. When the first step S8 is executed, since a predetermined time has not elapsed since the compressor 20 was stopped in step S6, NO is determined in step S8, the flow is terminated, and the process is restarted from step S1. That is, the thermo-off state is maintained until at least a predetermined time elapses from the stop of the compressor 20. After that, when a predetermined time elapses from the stop of the compressor 20, YES is determined in S8, and the process proceeds to step S9.

The control unit 14 determines whether or not “room temperature T1-set temperature T2 <shift temperature value ΔT” (S9). Since the set temperature T2 + shift temperature value ΔT is the thermo-off determination temperature T3, step S9 is, in other words, a step of determining whether or not the room temperature T1 <thermo-off determination temperature T3 (see FIG. 3A). When step S9 is executed for the first time, the shift temperature value ΔT is + 2.0 ° C., which is the initial value set in step S3.

When the room temperature T1 ≧ thermo-off determination temperature T3, it is determined that “room temperature T1-set temperature T2 <shift temperature value ΔT” is not satisfied (NO in S9), the flow is terminated, and the process is restarted from step S1. After that, the room temperature T1 decreases depending on the thermo-off state, and when the room temperature T1 <thermo-off determination temperature T3 is reached, it is determined that "room temperature T1-set temperature T2 <shift temperature value ΔT" (YES in S9), and step S10 is performed. Transition.

The control unit 14 is set to the thermo-on state (S10). Specifically, the control unit 14 switches from the thermo-off state to the thermo-on state by controlling the compressor 20 to operate at a predetermined drive frequency.

The control unit 14 increases the count (S11). Specifically, the control unit 14 adds 1 to the count stored in the storage unit 18. When step S11 is executed for the first time, since the count is 0, which is the initial value, the control unit 14 adds 1 to 0 and writes a new count as 1 in the storage unit 18.

Next, the above-mentioned step S7 is executed again, and it is determined whether or not the count is 3 or more. When the first transition from step S11 to step S7 is performed, the count is 1, so it is determined that the count is not 3 or more (NO in S7), the flow is terminated, and the process is restarted from step S1.

Next, when step S1 and step S2 are executed, since the count is 1, it is determined that the count is not 0 (NO in S2), step S3 is skipped, and the process proceeds to step S4. When the count becomes 1 or more, the initialization of the shift temperature value ΔT in step S3 is not executed. In the following step S4, since the thermo-on state has been switched in the previous step S10, it is determined that the thermo-off state is not present (NO in S4), and the processes related to steps S5 to S7 are executed again.

According to the flow described above, the processes related to steps S1 to S11 are repeated until the count UP in step S11 is performed three times and the count changes from the initial value 0 to 3. Specifically, in the thermo-on state, NO is determined in step S4, and the thermo-on state is continued until the state of room temperature T1 ≥ thermo-off determination temperature T3 continues for a predetermined time (for example, 3 minutes) (S5). After that, when the state of the room temperature T1 ≧ thermo-off determination temperature T3 continues for a predetermined time, YES is determined in step S5, and the thermo-off state is switched to (S6). In the thermo-off state, YES is determined in step S4, the compressor 20 is stopped for at least a predetermined time (for example, 3 minutes) (S8), and the thermo-off state is continued until room temperature T1 <thermo-off determination temperature T3. (S9). After that, when the room temperature T1 <thermo-off determination temperature T3 is satisfied, YES is determined in step S9, and the thermo-on state is switched to (S10). With the switch to the thermo-on state, the count is incremented by 1 (S11).

The switching from the thermo-on state to the thermo-off state and the switching from the thermo-off state to the thermo-on state as described above are set as one set, and this is repeated three sets (S7). By repeating these three sets, as shown in FIG. 3A, a thermo-on / off operation in which the thermo-on state and the thermo-off state are alternately repeated with the thermo-off determination temperature T3 as a threshold value is executed.

After that, when it is determined that the count is 3 or more (YES in S7), the process proceeds to step S12.

The control unit 14 makes a determination regarding the value of "the average value of the minimum values of the room temperature T1 of the last three times-the set temperature T2" (S12). Specifically, the values of "the average value of the minimum values of the room temperature T1 of the last three times-the set temperature T2" are "+ 0.5 ° C or higher", "less than 0 ° C", and "0 ° C or higher and less than + 0.5 ° C". Which of the three categories "is applicable" is determined. In addition, less than may be changed to the following, and more may be changed to "greater than". Similarly, vice versa may be made.

The determination in step S12 will be described with reference to FIG. FIG. 6 is a graph showing an example of the temperature transition of the room temperature T1 when one set of the above-mentioned thermo-on / off operation is executed three times.

As shown in FIG. 6, there is one minimum value (minimum value) Tmin of room temperature T1 per set of thermo-on / off operation. In step S12 described above, the values obtained by subtracting the set temperature T2 from the average value of the three minimum values Tmin in the three sets of thermo-on / off operation are + 0.5 ° C. or higher, lower than 0 ° C., and 0 ° C. or higher and lower than + 0.5 ° C. Determine which of the above applies.

If the value is + 0.5 ° C. or higher, the process proceeds to step S13. If the value is less than 0 ° C., the process proceeds to step S14. If the value is 0 ° C. or higher and lower than + 0.5 ° C. Ends the flow and resumes from step S1.

FIG. 6 shows an example in which the value of “the average value of the minimum values of the room temperature T1 of the last three times − the set temperature T2” is + 0.5 ° C. or higher, and the process proceeds to step S13. The control unit 14 subtracts 0.5 ° C. from the shift temperature value ΔT (S13). When step S12 is executed first and the process proceeds to step S13, the shift temperature value ΔT is the initial value of + 2.0 ° C., so 0.5 ° C. is subtracted to obtain + 1.5 ° C. The control unit 14 writes + 1.5 ° C. to the storage unit 18 as a new shift temperature value ΔT. In this way, the shift temperature value ΔT is updated.

As shown in FIG. 6, the thermo-off determination temperature T3 is brought closer to the set temperature T2 by updating the shift temperature value ΔT so as to reduce the absolute value of the shift temperature value ΔT set to a positive value during the heating operation. Can be. As a result, the temperature zone of the room temperature T1 maintained by the thermo-on / off operation can be brought closer to the set temperature T2, and the airtightness at the installation location of the air conditioner 3A is higher than that in the case where the shift temperature value ΔT is a fixed value. It is possible to realize thermo-on / off operation suitable for heat insulation.

On the other hand, when it is determined in step S12 that the value of "the average value of the minimum values of the room temperature T1 of the last three times-the set temperature T2" is 0 ° C. or more and less than + 0.5 ° C., the control unit 14 determines. End the flow. That is, the shift temperature value ΔT is not updated, and the original value is left unchanged. In such a case, in the temperature transition of the room temperature T1 as shown in FIG. 6, the minimum value Tmin of the room temperature T1 changes in an appropriate range (0 ° C. or more and less than + 0.5 ° C.) with respect to the set temperature T2. Therefore, the shift temperature value ΔT is left unchanged without being updated. As a result, it is possible to maintain the thermo-on / off operation suitable for the installation environment of the air conditioner 3A.

On the other hand, in step S12, when it is determined that the value of "the average value of the minimum values of the room temperature T1 of the last three times-the set temperature T2" is less than 0 ° C., the control unit 14 sets the shift temperature value ΔT. Add 0.5 ° C. (S14). In such a case, in the temperature transition of the room temperature T1 as shown in FIG. 6, since the minimum value Tmin of the room temperature T1 is lower than the set temperature T2, 0.5 ° C. is added to the shift temperature value ΔT. As a result, the thermo-off determination temperature T3 can be set to an appropriately higher value with respect to the set temperature T2.

When the steps S13 and S14 are executed, the control unit 14 limits the value of the shift temperature value ΔT (S15). Specifically, the maximum value and the minimum value regarding the shift temperature value ΔT are stored in advance in the storage unit 18, and the control unit 14 limits the shift temperature value ΔT based on the stored maximum value and minimum value. The maximum value of the shift temperature value ΔT in the heating operation is set to, for example, + 2.0 ° C., and the minimum value is set to, for example, + 1.0 ° C. From this, the shift temperature value ΔT in the heating operation is set to a positive value.

The control unit 14 updates the shift temperature value ΔT updated in steps S13 and S14 to + 2.0 ° C. when it is higher than + 2.0 ° C., and updates it to + 1.0 ° C. when it is lower than + 1.0 ° C. To do. This limits the shift temperature value ΔT. By setting a limit on the shift temperature value ΔT, it is possible to prevent the shift temperature value ΔT from changing excessively.

According to the above-mentioned flow, at the stage where one set of thermo-on / off operation as shown in FIG. 6 is executed three times, the shift temperature is adjusted according to the difference between the minimum value Tmin of the room temperature T1 and the set temperature T2 of the last three times. Update the value ΔT. By continuing such a flow, the shift temperature value ΔT is updated so that the thermo-off determination temperature T3 becomes an appropriate value with respect to the set temperature T2 based on the actual results of the room temperature T1 in the past thermo-on / off operation. be able to. As a result, it is possible to realize thermo-on / off operation in which the room temperature T1 is maintained in a temperature zone close to the set temperature T2, which is more suitable for the installation environment of the air conditioner 3A than in the case where the shift temperature value ΔT is fixed. Driving is possible.

Especially in the heating operation, the shift temperature value ΔT is set to a positive value (S3, S15), and the control unit 14 has the average value of the minimum value Tmin of the room temperature T1 of the last three times being 0 than the set temperature T2. When it is determined that the temperature is higher than .5 ° C. (first temperature range) (S12), the absolute value of the shift temperature value ΔT is updated to be small (S13).

When the average value of the minimum value Tmin of the room temperature T1 of the last three times is higher than the predetermined temperature range with respect to the set temperature T2, it can be said that the environment in which the air conditioner 3A is installed is an environment in which the temperature does not easily drop. In such a case, the thermo-on / off operation is performed to maintain the room temperature T1 in a temperature zone closer to the set temperature T2 by updating the shift temperature value ΔT to be smaller and bringing the thermo-off determination temperature T3 closer to the set temperature T2. Is possible.

When the heating operation is stopped during the execution of the flowchart of FIG. 5 and then the heating operation is restarted, the latest shift temperature value ΔT and the count value stored in the storage unit 18 are taken over, and FIG. The flowchart of 5 is executed. On the other hand, when the power supply of the air conditioner 3A is turned off, the shift temperature value ΔT and the count are reset to the initial values.

Next, a method of updating the shift temperature value ΔT in the cooling operation will be described with reference to FIGS. 7 and 8.

As shown in FIG. 7, the control unit 14 determines whether or not the cooling operation is in progress (S21). The control unit 14 determines whether or not the cooling operation is in progress based on, for example, a signal transmitted from the remote controller 15 to the storage unit 18. When it is determined that the cooling operation is not in progress (NO in S21), the flow is terminated.

When it is determined that the air conditioner is cooling (YES in S21), the control unit 14 determines whether or not the count is 0 (S22). The count is information stored in the storage unit 18, and the initial value is set to 0. When step S22 is executed for the first time, it is determined that the count is 0 (YES in S22), and the process proceeds to step S23.

The control unit 14 initializes the shift temperature value ΔT (S23). Specifically, the control unit 14 sets the shift temperature value ΔT to −1.5 ° C.

The control unit 14 determines whether or not it is in the thermo-off state (S24). For example, when the compressor 20 is being operated, the control unit 14 determines that the compressor 20 is not in the thermo-off state (that is, the thermo-on state) (NO in S24), and proceeds to step S25. On the other hand, when the operation of the compressor 20 is stopped, the control unit 14 determines that the thermo-off state (YES in S24), and proceeds to step S28. When step S24 is executed for the first time, it is determined that the compressor 20 is not in the thermo-off state because it is in the thermo-on state in which the compressor 20 is being operated (NO in S24), and the process proceeds to step S25.

The control unit 14 determines whether or not the state of “room temperature T1-set temperature T2 <shift temperature value ΔT” has continued for a predetermined time (S25). The predetermined time is set to, for example, 3 minutes. Since the set temperature T2 + shift temperature value ΔT is the thermo-off determination temperature T3, step S25 is, in other words, a step of determining whether or not the state of room temperature T1 <thermo-off determination temperature T3 has continued for a predetermined time (see FIG. 4A). .. When step S25 is executed for the first time, the shift temperature value ΔT is −1.5 ° C., which is the initial value set in step S23.

Even if the room temperature is T1 <thermo-off determination temperature T3, if the state does not continue for at least a predetermined time, NO is determined in step S25, the flow is terminated, and the process is restarted from step S21. That is, the thermo-on state is maintained until the state of room temperature T1 <thermo-off determination temperature T3 continues for a predetermined time. On the other hand, if the state continues for a predetermined time, it is determined that the state of "room temperature T1-thermo-off determination temperature T3 <shift temperature value ΔT" has continued for a predetermined time (YES in S25), and the process proceeds to step S26.

The control unit 14 is set to the thermo-off state (S26). Specifically, the control unit 14 switches from the thermo-on state to the thermo-off state by controlling the compressor 20 to stop the operation.

The control unit 14 determines whether or not the count is 3 times or more (S27). Since the initial value of the count is 0 when step S27 is executed for the first time, it is determined that the count is not three or more times (NO in S27), the flow is terminated, and the process is restarted from step S21.

Next, when step S24 is executed, it is determined that the thermo-off state (YES in S24), and the process proceeds to step S28.

The control unit 14 determines whether or not a predetermined time has elapsed since the compressor 20 was stopped (S28). The predetermined time is set to, for example, 3 minutes. When the step S28 is executed for the first time, since a predetermined time has not elapsed from the stop of the compressor 20 in the step S26, NO is determined in the step S28, the flow is terminated, and the process is restarted from the step S21. That is, the thermo-off state is maintained until at least a predetermined time elapses from the stop of the compressor 20. After that, when a predetermined time elapses from the stop of the compressor 20, YES is determined in S28, and the process proceeds to step S29.

The control unit 14 determines whether or not “room temperature T1-set temperature T2 ≧ shift temperature value ΔT” (S29). Since the set temperature T2 + the shift temperature value ΔT is the thermo-off determination temperature T3, step S29 is, in other words, a step of determining whether or not the room temperature T1 ≥ the thermo-off determination temperature T3 (see FIG. 4A). When step S29 is executed for the first time, the shift temperature value ΔT is −1.5 ° C., which is the initial value set in step S23.

When the room temperature T1 <thermo-off determination temperature T3, it is determined that "room temperature T1-set temperature T2 ≥ shift temperature value ΔT" (NO in S29), the flow is terminated, and the process is restarted from step S21. After that, the room temperature T1 rises depending on the thermo-off state, and when the room temperature T1 ≥ the thermo-off determination temperature T3, it is determined that "room temperature T1-set temperature T2 ≥ shift temperature value ΔT" (YES in S29), and step S30. Transition.

The control unit 14 is set to the thermo-on state (S30). Specifically, the control unit 14 switches from the thermo-off state to the thermo-on state by controlling the compressor 20 to operate at a predetermined drive frequency.

The control unit 14 increases the count (S31). Specifically, the control unit 14 adds 1 to the count stored in the storage unit 18. When step S31 is executed for the first time, since the count is 0, which is the initial value, the control unit 14 adds 1 to 0 and writes the new count as 1 in the storage unit 18.

Next, the above-mentioned step S27 is executed again, and it is determined whether or not the count is 3 or more. When the first transition from step S31 to step S27 is performed, the count is 1, so it is determined that the count is not 3 or more (NO in S27), the flow is terminated, and the process is restarted from step S21.

Next, when step S21 and step S22 are executed, since the count is 1, it is determined that the count is not 0 (NO in S22), step S23 is skipped, and the process proceeds to step S24. When the count becomes 1 or more, the initialization of the shift temperature value ΔT in step S23 is not executed. In the following step S24, since the thermo-on state has been switched in the previous step S30, it is determined that the thermo-off state is not present (NO in S24), and the processes related to steps S25 to S27 are executed again.

According to the flow described above, the count UP in step S31 is performed three times, and the processes related to steps S21 to S31 are repeated until the count changes from the initial value of 0 to 3. Specifically, in the thermo-on state, NO is determined in step S24, and the thermo-on state is continued until the state of room temperature T1 <thermo-off determination temperature T3 continues for a predetermined time (for example, 3 minutes) (S25). After that, when the state of room temperature T1 <thermo-off determination temperature T3 continues for a predetermined time, YES is determined in step S25, and the thermo-off state is switched to (S26). In the thermo-off state, YES is determined in step S24, the compressor 20 is stopped for at least a predetermined time (for example, 3 minutes) (S28), and then the thermo-off state is continued until the room temperature T1 ≥ the thermo-off determination temperature T3. (S29). After that, when the room temperature T1 ≥ the thermo-off determination temperature T3, YES is determined in step S29, and the thermo-on state is switched to (S30). With the switch to the thermo-on state, the count is incremented by 1 (S31).

The switching from the thermo-on state to the thermo-off state and the switching from the thermo-off state to the thermo-on state as described above are set as one set, and this is repeated three sets (S27). By repeating these three sets, as shown in FIG. 4A, a thermo-on / off operation in which the thermo-on state and the thermo-off state are alternately repeated with the thermo-off determination temperature T3 as a threshold value is executed.

After that, when it is determined that the count is 3 or more (YES in S27), the process proceeds to step S32.

The control unit 14 makes a determination regarding the value of "the average value of the maximum values of the room temperature T1 of the last three times-the set temperature T2" (S32). Specifically, the values of "the average value of the maximum values of the room temperature T1 of the last three times-the set temperature T2" are "less than -0.5 ° C", "0 ° C or higher", and "-0.5 ° C or higher 0". Determine which of the three categories "less than ° C" applies. In addition, less than may be changed to the following, and more may be changed to "greater than". Similarly, vice versa may be made.

The determination in step S32 will be described with reference to FIG. FIG. 8 is a graph showing an example of the temperature transition of the room temperature T1 when one set of the above-mentioned thermo-on / off operation is executed three times.

As shown in FIG. 8, there is one maximum value Tmax (minimum value) of room temperature T1 per set of thermo-on / off operation. In step S32 described above, the values obtained by subtracting the set temperature T2 from the average value of the three maximum values Tmax in the three sets of thermo-on / off operation are less than -0.5 ° C, 0 ° C or higher, and -0.5 ° C or higher 0. Determine which of the temperatures below ° C applies.

If the value is less than −0.5 ° C, the process proceeds to step S33, and if the value is 0 ° C or higher, the process proceeds to step S34, and the value is −0.5 ° C or higher and lower than 0 ° C. If there is, the flow is terminated and the process is restarted from step S21.

FIG. 8 shows an example in which the value of “the average value of the maximum values of the room temperature T1 of the last three times − the set temperature T2” is less than −0.5 ° C., and the process proceeds to step S33. The control unit 14 adds + 0.5 ° C. to the shift temperature value ΔT (S33). When step S32 is first executed and the process proceeds to step S33, the shift temperature value ΔT is the initial value of −2.0 ° C., so 0.5 ° C. is added to obtain −1.5 ° C. The control unit 14 writes −1.5 ° C. to the storage unit 18 as a new shift temperature value ΔT. In this way, the shift temperature value ΔT is updated.

As shown in FIG. 8, the thermo-off determination temperature T3 is brought closer to the set temperature T2 by updating the shift temperature value ΔT so as to reduce the absolute value of the shift temperature value ΔT set to a negative value during the cooling operation. Can be. As a result, the temperature zone of the room temperature T1 maintained by the thermo-on / off operation can be brought closer to the set temperature T2, and the airtightness at the installation location of the air conditioner 3A is higher than that in the case where the shift temperature value ΔT is a fixed value. It is possible to realize thermo-on / off operation suitable for heat insulation.

On the other hand, in step S32, when it is determined that the value of "the average value of the maximum values of the room temperature T1 of the last three times-the set temperature T2" is −0.5 ° C. or higher and lower than 0 ° C., the control unit 14 moves. , End the flow. That is, the shift temperature value ΔT is not updated, and the original value is left unchanged. In such a case, in the temperature transition of the room temperature T1 as shown in FIG. 8, the maximum value Tmax of the room temperature T1 changes in an appropriate range (−0.5 ° C. or more and less than 0 ° C.) with respect to the set temperature T2. Therefore, the shift temperature value ΔT is not updated and is left unchanged. As a result, it is possible to maintain the thermo-on / off operation suitable for the installation environment of the air conditioner 3A.

On the other hand, in step S32, when it is determined that the value of "the average value of the maximum values of the room temperature T1 of the last three times-the set temperature T2" is 0 ° C. or higher, the control unit 14 sets the shift temperature value ΔT. 0.5 ° C. is subtracted (S34). In such a case, in the temperature transition of the room temperature T1 as shown in FIG. 8, since the maximum value Tmax of the room temperature T1 is higher than the set temperature T2, 0.5 ° C. is subtracted from the shift temperature value ΔT. As a result, the thermo-off determination temperature T3 can be set to a value appropriately lower than the set temperature T2.

When the steps S33 and S34 are executed, the control unit 14 limits the value of the shift temperature value ΔT (S35). Specifically, the maximum value and the minimum value regarding the shift temperature value ΔT are stored in advance in the storage unit 18, and the control unit 14 limits the shift temperature value ΔT based on the stored maximum and minimum values. The maximum value of the shift temperature value ΔT in the cooling operation is set to, for example, −1.5 ° C., and the minimum value is set to, for example, −0.5 ° C. Therefore, the shift temperature value ΔT in the cooling operation is set to a negative value.

The control unit 14 updates the shift temperature value ΔT updated in steps S33 and S34 to −2.0 ° C. when it is lower than −2.0 ° C., and −0 ° C. when it is higher than −0.5 ° C. Update to 5 ° C. This limits the shift temperature value ΔT. By setting a limit on the shift temperature value ΔT, it is possible to prevent the shift temperature value ΔT from changing excessively.

According to the above-mentioned flow, at the stage where one set of thermo-on / off operation as shown in FIG. 8 is executed three times, the shift temperature is adjusted according to the difference between the maximum value Tmax of the room temperature T1 and the set temperature T2 of the last three times. Update the value ΔT. By continuing such a flow, the shift temperature value ΔT is updated so that the thermo-off determination temperature T3 becomes an appropriate value with respect to the set temperature T2 based on the actual results of the room temperature T1 in the past thermo-on / off operation. be able to. As a result, it is possible to realize thermo-on / off operation in which the room temperature T1 is maintained in a temperature zone close to the set temperature T2, which is more suitable for the installation environment of the air conditioner 3A than in the case where the shift temperature value ΔT is fixed. Driving is possible.

Especially in the cooling operation, the shift temperature value ΔT is set to a negative value (S23, S35), and the control unit 14 has the average value of the maximum value Tmax of the room temperature T1 of the last three times being 0 than the set temperature T2. When it is determined that the temperature is lower than .5 ° C. (second temperature range) (S32), the absolute value of the shift temperature value ΔT is updated to be small (S33).

When the average value of the maximum value Tmax of the room temperature T1 of the last three times is lower than the set temperature T2 by a predetermined temperature range or more, it can be said that the environment in which the air conditioner 3A is installed is an environment in which the temperature does not easily rise. In such a case, the thermo-on / off operation is performed to maintain the room temperature T1 in a temperature zone closer to the set temperature T2 by updating the shift temperature value ΔT to be smaller and bringing the thermo-off determination temperature T3 closer to the set temperature T2. Is possible.

When the cooling operation is stopped during the execution of the flowchart of FIG. 7 and then the cooling operation is restarted, the latest shift temperature value ΔT and the count value stored in the storage unit 18 are taken over, and FIG. The flowchart of 7 is executed. On the other hand, when the power supply of the air conditioner 3A is turned off, the shift temperature value ΔT and the count are reset to the initial values.

According to the control method described above, in common to the heating operation and the cooling operation, the thermo-on / off operation is executed with the temperature obtained by shifting the shift temperature value ΔT with respect to the set temperature T2 as the thermo-off determination temperature T3. Further, the shift temperature value ΔT is determined based on the actual results of the room temperature T1 in the past thermo-on / off operation. According to such a method, the operation more suitable for the installation environment of the air conditioner 3A becomes possible as compared with the case where the shift temperature value ΔT is set to a fixed value.

Further, when determining the shift temperature value ΔT, the control unit 14 determines the shift temperature value ΔT based on the difference between the maximum value Tmax or the minimum value Tmin of the room temperature T1 in the past thermo-on / off operation and the set temperature T2. Has been decided. By determining the shift temperature value ΔT in this way, the thermo-on / off operation for maintaining the room temperature T1 in the temperature zone close to the set temperature T2 becomes possible.

Further, the maximum value and the minimum value are defined with respect to the absolute value of the shift temperature value ΔT. This makes it possible to prevent the shift temperature value ΔT from being excessively increased or decreased.

Although the invention of the present disclosure has been described above with reference to the above-described embodiment, the invention of the present disclosure is not limited to the above-described embodiment. For example, in the embodiment, specific values relating to temperature and time are described, but these specific values are merely examples and may be appropriately changed according to the specifications of the air conditioner 3A and the like.

Further, in the embodiment, when the value of "the average value of the maximum value (or the minimum value) of the room temperature T1 of the last three times-the set temperature T2" is used as the condition for updating the shift temperature value ΔT (S12, S32). Although explained, it is not limited to such a case. For example, a condition based on "the duration of the thermo-on state in the past thermo-on / off operation" may be added. The length of the duration of the thermo-on state is an index of the ease of temperature rise / fall in the environment in which the air conditioner 3A is installed. By determining the shift temperature value ΔT based on such a duration, thermo-on / off operation for maintaining the room temperature T1 in a temperature zone closer to the set temperature T2 becomes possible.

For example, in the temperature transition at room temperature T1 as shown in FIGS. 6 and 8, the shift temperature value is based on the condition that the average value of the durations of the last three thermo-on states is within a predetermined time (for example, 15 minutes). It may be updated to reduce the absolute value of ΔT. When the average value of the duration of the thermo-on state of the last three times is short, the temperature change due to the air conditioning operation is likely to occur in the environment where the air conditioner 3A is installed, while the temperature change is gradual when the air conditioning operation is stopped. It is presumed to be. In such a case, the thermo-on / that maintains the room temperature T1 in a temperature zone closer to the set temperature T2 by updating the shift temperature value ΔT to be smaller and bringing the thermo-off determination temperature T3 closer to the set temperature T2. Off operation is possible.

Further, in the embodiment, the case where the temperature values of the most recent three times are used in S12 and S32 has been described, but the case is not limited to such a case. Not limited to the last three times, the temperature of three times at any time in the past may be adopted. Further, the number of times is not limited to three, and any other number may be used. Any number of times, one or more times, may be referred to as X times, Y times, Z times, or the like.

Further, in the embodiment, the first determination temperature (S5, S25) for determining the switching from the thermo-on state to the thermo-off state and the second determination temperature (S9, S29) for determining the switching from the thermo-off state to the thermo-on state. The case where the common thermo-off determination temperature T3 is used has been described, but the case is not limited to such a case. Different determination temperatures may be used as the respective determination temperatures, that is, different shift temperature values ΔT may be used. Even in such a case, at least the update of the shift temperature value ΔT described with reference to FIGS. 5 to 8 with respect to the shift temperature value ΔT for determining the first determination temperature for determining the switching from the thermo-on state to the thermo-off state. By applying the method, the same effect as that of the embodiment can be obtained.

Further, in the embodiment, the case where both the maximum value and the minimum value regarding the absolute value of the shift temperature value ΔT are fixed values has been described, but the case is not limited to such a case, and at least one of them may be a variable value. For example, the maximum value may be a fixed value and the minimum value may be a variable value. In this case, the minimum value may be, for example, a variable value determined according to the "house cold / heat holding capacity".

“Housing cold / heat retention capacity” means, for example, that the server 4 shown in FIG. 1 performs machine learning based on the operation history information transmitted from the air conditioner group 2, and each air conditioner 3 is installed. This is to calculate the cold / hot retention capacity of the installation environment. The cold / heat retention capacity represents the rate / degree of heat retention in each installation environment, and can be used as an index regarding the airtightness and heat insulation of the installation environment. The server 4 may construct various models such as a "house performance estimation model" and a "room temperature change prediction model" in calculating the cold / heat retention capacity (detailed description thereof will be omitted in this specification). Information regarding the "house cold / heat holding capacity" is transmitted from the server 4 to the indoor unit 8 and stored in the storage unit 18. When the control unit 14 reads the information from the storage unit 18, the information regarding the "house cold / heat holding capacity" can be used.

For example, when the server 4 is shown to have a high house cold / heat holding capacity, the minimum absolute value of the shift temperature value ΔT is set to a relatively small value, and the house cold / heat holding capacity may be low. If indicated, set the minimum value to a relatively large value. Information on the minimum value set in this way is transmitted from the server 4 to the indoor unit 8, and the control unit 14 limits the shift temperature value ΔT using the minimum value (S15, S35), so that the air conditioner 3A It is possible to operate more suitable for the installation environment of.

In the embodiment, the case where the control unit 14 is provided in the indoor unit 8 has been described, but the present invention is not limited to such a case, and includes the control unit 14 provided in the indoor unit 8 and the server 4 that communicates with the control unit 14. Then, it may be used as a “control unit”.

Although the present disclosure has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various modifications and modifications are obvious to those skilled in the art. It should be understood that such modifications and amendments are included therein, as long as they do not deviate from the scope of the present disclosure by the appended claims. In addition, changes in the combination and order of elements in each embodiment can be realized without departing from the scope and ideas of the present disclosure.

The present disclosure is applicable to any air conditioner.

2 Air conditioner group 3, 3A Air conditioner 4 Server 6 External information source 8 Indoor unit 10 Outdoor unit 12 Refrigeration cycle 14 Control unit 15 Remote control 16 Room temperature sensor 18 Storage unit 20 Compressor T1 Room temperature T2 Set temperature T3 Thermo-off judgment temperature Tmax Maximum value Tmin Minimum value ΔT Shift temperature value

Claims (9)

A compressor that compresses the refrigerant that circulates in the refrigeration cycle,
A room temperature sensor that measures room temperature,
Equipped with a control unit that controls the operation of the air conditioner,
The control unit executes a thermo-on / off operation that controls the operation of the compressor with a predetermined thermo-off determination temperature as a threshold value based on the room temperature measured by the room temperature sensor.
The control unit executes the thermo-on / off operation with the temperature obtained by shifting a predetermined shift temperature value with respect to the set temperature as the thermo-off determination temperature, and determines the shift temperature value based on the actual room temperature in the past thermo-on / off operation. , Air conditioner. The first aspect of the present invention, wherein the control unit determines the shift temperature value based on the difference between the maximum or minimum room temperature in the past thermo-on / off operation and the set temperature when determining the shift temperature value. Air conditioner. During the heating operation, the shift temperature value is set to a positive value, and the control unit has a temperature at which the average value of the minimum values of the room temperature X times in the past is higher than the set temperature by the first temperature range or more. The air conditioner according to claim 2, wherein the air conditioner is updated so as to reduce the absolute value of the shift temperature value when the determination is made. During the cooling operation, the shift temperature value is set to a negative value, and the control unit has a temperature at which the average value of the maximum values of the room temperature Y times in the past is lower than the set temperature by a second temperature range or more. The air conditioner according to claim 2 or 3, wherein the air conditioner is updated so as to reduce the absolute value of the shift temperature value when the determination is made. The air conditioner according to any one of claims 1 to 4, wherein the control unit determines the shift temperature value based on the duration of the thermo-on state in the past Z times when determining the shift temperature value. The air conditioning according to claim 5, wherein when the control unit determines that the average value of the duration of the thermo-on state of the past Z times is within a predetermined time, the control unit updates the absolute value of the shift temperature value to be small. Machine. The air conditioner according to any one of claims 1 to 6, wherein the maximum value and the minimum value are determined with respect to the absolute value of the shift temperature value. The air conditioner according to claim 7, wherein the maximum value with respect to the absolute value of the shift temperature value is a fixed value, and the minimum value is a variable value. The air conditioner according to claim 8, wherein the minimum value with respect to the absolute value of the shift temperature value is determined according to the cold / heat holding capacity of the house at the place where the air conditioner is installed.

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