Air conditioning system

Abstract

To provide technique capable of suppressing increase in energy consumption during air-conditioning.SOLUTION: An air conditioner 100 sends out conditioned air. An indoor temperature detecting unit 20 detects an indoor temperature of a living space. A wall temperature detecting unit 22 detects a wall temperature of a wall surface forming the living space. A control unit 120 adjusts air conditioning capacity of the air conditioner 100. The control unit 120 determines the air conditioning capacity of the air conditioner 100 as an output value so that the indoor temperature becomes close to a set temperature, then, determines a correction value in correspondence with time change in the wall temperature, and corrects the output value with the correction value.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to air conditioning technology, and more particularly to an air conditioning system for air conditioning a living space. [Background technology]

[0002] An air conditioner that conditions a living space determines its air conditioning capacity so that the set temperature matches the room temperature. Furthermore, the air conditioner adjusts its air conditioning capacity by changing the set temperature based on the wall temperature (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-152165 Summary of the Invention [Problem to be solved by the invention]

[0004] If the set temperature is changed based on the wall temperature, the air conditioning capacity is adjusted so that the wall temperature becomes the set temperature, which results in excessive air conditioning capacity and increased power consumption.

[0005] The present disclosure has been made in light of these circumstances, and its purpose is to provide a technology that suppresses increases in energy consumption during air conditioning. [Means for solving the problem]

[0006] In order to solve the above problems, an air conditioning system according to one aspect of the present disclosure is an air conditioning system for air conditioning a living space, and includes an air conditioner that supplies conditioned air, an indoor temperature detection unit that detects the indoor temperature of the living space, a wall temperature detection unit that detects the wall temperature of a wall surface that forms the living space, and a control unit that adjusts the air conditioning capacity of the air conditioner. The control unit determines the air conditioning capacity of the air conditioner as an output value so that the indoor temperature approaches a set temperature, then determines a correction value according to changes in the wall temperature over time, and corrects the output value using the correction value.

[0007] Any combination of the above components, or any transformation of the present disclosure into a method, device, system, recording medium, or computer program, is also valid as an aspect of the present disclosure. [Effects of the Invention]

[0008] According to the present disclosure, an increase in energy consumption during air conditioning can be suppressed. [Brief explanation of the drawings]

[0009] [Figure 1] 1(a) and 1(b) are diagrams showing the configuration of an air conditioning system according to this embodiment. [Figure 2] FIG. 2 is a diagram showing the change over time in power consumption and load factor. [Figure 3] 3(a)-(b) are diagrams showing the relationship between the load factor and the COP. [Figure 4] FIG. 4 is a diagram showing the time-dependent changes in the room temperature, the wall temperature, and the air conditioning capacity. [Figure 5] FIG. 5 is a diagram showing the configuration of the air conditioner of FIGS. 1(a)-(b). [Figure 6] FIG. 6 is a diagram showing the data structure of a table stored in the storage unit of FIG. [Figure 7] 7(a)-(b) are diagrams showing the time variations of the room temperature, wall temperature, and air conditioning capacity of the air conditioning system of FIGS. 1(a)-(b). [Figure 8] FIG. 8 is a flowchart showing the processing procedure performed by the air conditioner of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Before describing specific examples of the present disclosure, an overview of the examples will be provided. This example relates to an air conditioning system for conditioning a living space. The air conditioning system includes an air conditioner. Air conditioners generally determine their air conditioning capacity so that the indoor temperature approaches a set temperature. In such air conditioners, energy consumption increases when the air conditioning capacity fluctuates. The indoor temperature changes due to air conditioning control by the air conditioner, and also due to heat radiation from the walls of the living space. The air conditioning system according to this example uses air conditioning capacity that takes the wall temperature into consideration. This suppresses fluctuations in air conditioning capacity and also suppresses increases in energy consumption.

[0011] The examples described below each illustrate a preferred specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, component placement and connection configurations, steps (processes), and step order shown in the following examples are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following examples, components that are not described in the independent claims that represent the highest concept of the present disclosure are described as optional components. Furthermore, in each figure, substantially identical components are designated by the same reference numerals, and redundant descriptions are omitted or simplified.

[0012] 1(a)-(b) show the configuration of an air conditioning system 1000. The air conditioning system 1000 conditions a living space 10. Air conditioning includes at least one of cooling and heating, but in this embodiment, cooling will be described as an example. Heating simply involves the reverse operation of cooling. As shown in FIG. 1(a), the living space 10 includes a ceiling 12 above and a floor 14 below. An air conditioner 100 is installed on the ceiling 12. The lower surface of the air conditioner 100 is exposed to the living space 10, and an air inlet 200 and a first air outlet 210a and a second air outlet 210b, collectively referred to as air outlets 210, are arranged on the lower surface of the air conditioner 100.

[0013] The air inlet 200 draws in air from within the living space 10, and the drawn-in air is sent to the air conditioner 100. The air conditioner 100 performs a cooling operation as an air conditioning operation on the air drawn in through the air inlet 200, and sends out the cooled conditioned air to the air outlets 210 (first air outlet 210a and second air outlet 210b). The air outlets 210 blow out the conditioned air from above the living space 10 into the living space 10. More specifically, the first air outlet 210a and the second air outlet 210b blow out the conditioned air in mutually different directions. The blown-out conditioned air flows toward the floor 14.

[0014] An indoor temperature detection unit 20 is installed in the living space 10. The indoor temperature detection unit 20 detects the temperature of the living space 10 (hereinafter referred to as the "indoor temperature"). The indoor temperature detection unit 20 transmits the indoor temperature to the air conditioner 100 via wireless or wired communication. A wall temperature detection unit 22 is installed on a wall surface forming the living space 10. The wall temperature detection unit 22 detects the temperature of the wall surface of the living space 10 (hereinafter referred to as the "wall temperature"). The wall temperature detection unit 22 transmits the wall temperature to the air conditioner 100 via wireless or wired communication. The air conditioner 100 performs cooling operation using the indoor temperature and wall temperature. Note that the wall surface of the living space 10 detected by the wall temperature detection unit 22 is preferably a wall surface facing outdoors among the walls constituting the living space 10.

[0015] 1(b), the wall temperature detection unit 22 is provided in the air conditioner 100, not on a wall surface forming the living space 10. The wall temperature detection unit 22 is, for example, a thermosensor, and detects the wall temperature remotely. The wall temperature detection unit 22 outputs the wall temperature to the air conditioner 100.

[0016] Conventional air conditioners 100 perform cooling operations based on the intake temperature (room temperature). The following describes conventional cooling operations with reference to FIGS. 2, 3(a)-(b), and 4. FIG. 2 shows the changes in power consumption and load factor over time. Power consumption is the amount of power consumed when the air conditioner 100 performs cooling operations, and the load factor is a value indicating the ratio to the rated capacity. The horizontal axis in FIG. 2 represents time (hour), and the vertical axis represents power consumption or load factor. Note that time (hour) in FIG. 2 is shown in chronological order, with each hour represented as Time 1, Time 2, Time 3, Time 4, Time 5, Time 6, and Time 7. Here, we assume that the air conditioner 100 is set to a temperature of 26°C during the summer. Over time, power consumption 300 and load factor 310 fluctuate in a similar manner. As power consumption 300 increases, load factor 310 also increases.

[0017] In addition to the load factor, the COP (Coefficient of Performance) is also used as an index for evaluating air conditioning performance. COP represents the air conditioning capacity (kW) per 1 kW of power consumption. Therefore, the higher the COP, the lower the power consumption. Figures 3(a)-(b) show the relationship between the load factor and COP. The horizontal axis in Figure 3(a) represents the load factor, and the vertical axis represents the COP. The COP is at its maximum when the load factor is approximately 30%. Furthermore, the COP decreases as the load factor becomes smaller than approximately 30%, and decreases as the load factor becomes larger than approximately 30%.

[0018] FIG. 3(b) shows the load factor and COP over time. The horizontal axis in FIG. 3(b) represents time (hour), and the vertical axis represents COP or load factor. Note that time (hour) in FIG. 3(b) is shown in chronological order, from time 1 to time 7, every hour. The load factor 310 is the same as in FIG. 2. COP 320 is calculated from the load factor 310 using the relationship in FIG. 3(a). At points P1, P2, and P4, the COP 320 decreases as the load factor 310 increases. At point P3, the COP 320 decreases as the load factor 310 decreases. Therefore, as the load factor in FIG. 3(a) fluctuates more, the COP decreases, as shown by the repeated cycle of minimum and maximum load factors around approximately 30%.

[0019] The load factor average 312 indicates the value obtained by averaging the load factor 310 between time 1 and time 7. The COP 322 for the load factor average indicates the value obtained from the load factor average 312 using the relationship in FIG. 3(a). On the other hand, the COP average 324 indicates the value obtained by averaging the COP 320 between time 1 and time 1. As shown in the figure, the COP average 324 is smaller than the COP 322 for the load factor average. This also shows that the COP decreases as the fluctuation in the load factor increases. Therefore, in order to suppress an increase in energy consumption, the air conditioning system 1000 is required to reduce the fluctuation in the load factor. This corresponds to reducing the fluctuation in the air conditioning capacity of the air conditioning system 1000.

[0020] FIG. 4 shows the changes over time in indoor temperature, wall temperature, and air conditioning capacity. The horizontal axis in FIG. 4 represents time (hour), and the vertical axis represents temperature or air conditioning capacity. Note that, like FIG. 3(b), the time (hour) in FIG. 4 is also shown chronologically from time 1 to time 7. Here, it is assumed that it is summer and the set temperature of the air conditioner 100 is 26°C. Under conditions in which the air conditioning system 1000 performs air conditioning according to the air conditioning capacity 330, the indoor temperature 332 and wall temperature 334 change over time. This can also be said to mean that under conditions in which the indoor temperature 332 and wall temperature 334 change over time, the air conditioning system 1000 performs air conditioning according to the air conditioning capacity 330. In order to suppress increases in energy consumption, the air conditioning system 1000 is required to minimize fluctuations in the air conditioning capacity 330.

[0021] Here, the wall temperature is determined by the balance between the cooling from the air conditioner 100 and the heat radiation from the wall. Therefore, when the air conditioning load of the air conditioner 100 increases, the wall temperature decreases, and when the air conditioning load of the air conditioner 100 decreases, the wall temperature increases. When the air conditioning load of the air conditioner 100 and the heat radiation from the wall are in balance, the temperature change becomes small. Therefore, control that balances the air conditioning load of the air conditioner 100 and the heat radiation from the wall is desired.

[0022] In the first time slot 350, even though the air conditioning capacity 330 is increasing, the wall temperature 334 does not change. This indicates that the air conditioning capacity (cooling capacity) of the air conditioner 100 is insufficient. If the wall temperature 334 does not change during cooling operation, it is desirable to increase the air conditioning capacity of the air conditioner 100 and change the wall temperature 334. This prevents the air conditioning capacity from changing too much in the future, resulting in excessive air conditioning capacity.

[0023] In the second time zone 352, when the air conditioner 100 is in the thermo-off mode, the wall temperature 334 rises. The rise in the wall temperature 334 causes the indoor temperature 332 to rise, and the rise in the indoor temperature 332 causes the air conditioning capacity 330 to fluctuate. For this reason, it is desirable to turn the air conditioner 100 in the thermo-on mode to suppress the rise in the wall temperature 334. Here, thermo-off means that when the temperature in the living space 10 reaches the set temperature, the air conditioner 100 stops and stops the operation of cooling the living space 10, and thermo-on means that when the temperature in the living space 10 deviates from (becomes higher than) the set temperature while the air conditioner 100 is stopped, the air conditioner 100 starts operating and starts the operation of cooling the living space 10.

[0024] In the third time zone 354, the wall temperature 334 is rising even though the air conditioning capacity 330 is rising. This indicates that the air conditioning capacity (cooling capacity) of the air conditioner 100 is insufficient. When the wall temperature 334 changes, it is desirable to increase the air conditioning capacity of the air conditioner 100 and lower the wall temperature 334. This prevents the air conditioning capacity from changing too much in the future, resulting in excessive air conditioning capacity.

[0025] 5 shows the configuration of the air conditioner 100. The air conditioner 100 includes an indoor temperature detection unit 20, a wall temperature detection unit 22, a setting unit 110, a control unit 120, and a temperature adjustment unit 130. The control unit 120 also includes an input unit 140, a timing unit 142, a memory unit 144, a calculation unit 146, a determination unit 148, and an output unit 150.

[0026] The setting unit 110 is an interface that can be operated by the user and accepts user operations. The setting unit 110 accepts the type of operation and the set temperature as user operations. The types of operation include, for example, heating operation, cooling operation, and fan operation. In this example, for example, cooling operation is set as the type of operation, and "26°C" is set as the set temperature.

[0027] The indoor temperature detection unit 20 detects the indoor temperature of the living space 10. The input unit 140 receives the type of operation and the set temperature from the setting unit 110, the indoor temperature from the indoor temperature detection unit 20, and the wall temperature from the wall temperature detection unit 22.

[0028] The calculation unit 146 calculates the difference between the set temperature and the room temperature as ΔT. The determination unit 148 determines the air conditioning capacity of the air conditioner 100 as an output value Q based on ΔT as follows: The output value of the air conditioning capacity is also called the refrigeration capacity. Air conditioning capacity output value Q = specific heat x density x air volume x ΔT This corresponds to determining the output value Q of the air conditioning capacity of the air conditioner 100 so that the indoor temperature approaches the set temperature. For example, the larger ΔT, the greater the difference from the set temperature, and therefore the larger the output value Q of the air conditioning capacity. Such output value Q of the air conditioning capacity is calculated at a predetermined interval, for example, every minute.

[0029] The determination unit 148 also receives the room temperature Tr and the wall temperature Tw at predetermined intervals, for example, one minute. The determination unit 148 calculates the time change ΔTr / dt of the room temperature Tr, the time change ΔTw / dt of the wall temperature Tw, and the time change ΔQ / dt of the output value Q of the air conditioning capacity as follows, assuming that the current time is "t." ΔTr / dt=Tr(t)-Tr(t-1) ΔTw / dt=Tw(t)-Tw(t-1) ΔQ / dt=Q(t)-Q(t-1)

[0030] The determination unit 148 refers to a table stored in the storage unit 144 based on ΔTr / dt, ΔTw / dt, and ΔQ / dt to determine whether the case corresponds to any one of Cases 1 to 3, or whether the case corresponds to none of Cases 1 to 3. FIG. 6 shows the data structure of the table stored in the storage unit 144. When ΔTr / dt is "+", ΔTw / dt is "0", and ΔQ / dt is "+", the determination unit 148 determines that the case corresponds to "Case 1". When ΔTr / dt is "+", ΔTw / dt is "+", the air conditioning state is "OFF", or ΔQ / dt is "off", the determination unit 148 determines that the case corresponds to "Case 2". When ΔQ / dt is "off", this corresponds to the air conditioner 100 not performing the cooling operation. If ΔTr / dt is "+", ΔTw / dt is "+", and ΔQ / dt is "+", the determination unit 148 determines that the situation corresponds to "Case 3". Here, "Case 1" corresponds to the situation in the first time period 350 in FIG. 4, "Case 2" corresponds to the situation in the second time period 352 in FIG. 4, and "Case 3" corresponds to the situation in the third time period 354 in FIG. 4. In other cases, the determination unit 148 determines that the situation does not correspond to any of Cases 1 to 3.

[0031] In the case of "Case 1", the determination unit 148 determines the correction value 1 as follows. Correction value 1 = 0.1 × Q(t) The determination unit 148 adds the correction value 1 to the output value Q(t) of the air conditioning capacity, thereby correcting the output value Q(t) using the correction value 1. Hereinafter, the output value Q(t) corrected using the correction value 1 will also be referred to as the "output value Q(t)."

[0032] In the case of "Case 2," the judgment unit 148 decides to turn on the heat of the air conditioner 100. Hereinafter, turning on the heat of the air conditioner 100 will also be referred to as the "output value Q(t)."

[0033] In the case of "Case 3", the determination unit 148 determines the correction value 3 as follows. Correction value 3 = 0.1 × ΔTw / dt × Q(t) The determination unit 148 corrects the output value Q(t) by adding the correction value 3 to the output value Q(t) of the air conditioning capacity. Hereinafter, the output value Q(t) corrected by the correction value 3 will also be referred to as the "output value Q(t)." In other words, the determination unit 148 determines the correction value 3 based on the change over time in the wall temperature Tw and the output value Q(t). The determination unit 148 corrects the output value Q(t) by adding the correction value 3 to the output value Q(t) of the air conditioning capacity. Hereinafter, the output value Q(t) corrected by the correction value 3 will also be referred to as the "output value Q(t)." Furthermore, the correction value 1 and the correction value 3 may be collectively referred to as the correction values.

[0034] If none of Cases 1 to 3 applies, the determination unit 148 determines not to perform correction on the output value Q(t) of the air conditioning capacity. The output unit 150 operates the temperature adjustment unit 130 based on the output value Q(t) of the air conditioning capacity determined by the determination unit 148.

[0035] Here, the control unit 120 may not correct the output value using the correction value in Case 1 or Case 3 if the room temperature Tr is not included in the range centered on the set temperature. This corresponds to not referring to the wall temperature Tw when the room temperature Tr is significantly different from the set temperature. Furthermore, the control unit 120 may correct the output value using the correction value regardless of the value of the room temperature Tr if the absolute value of the correction value is equal to or greater than a threshold value. This corresponds to performing correction regardless of the room temperature Tr when the amount of change over time in the wall temperature Tw is large.

[0036] The subject of the device, system, or method of the present disclosure includes a computer. The computer executes a program to realize the functions of the subject of the device, system, or method of the present disclosure. The computer includes, as its main hardware component, a processor that operates according to the program. The processor may be of any type, as long as it can realize the functions by executing the program. The processor may be composed of one or more electronic circuits, including a semiconductor integrated circuit (IC) or a large-scale integration (LSI). The electronic circuits may be integrated into a single chip or may be provided on multiple chips. The multiple chips may be integrated into a single device or may be provided on multiple devices. The program is recorded on a non-transitory recording medium, such as a computer-readable ROM, optical disk, or hard disk drive. The program may be pre-stored on the recording medium or may be supplied to the recording medium via a wide-area communication network, including the Internet.

[0037] 7(a)-(b) show the changes over time in the indoor temperature, wall temperature, and air conditioning capacity of the air conditioning system 1000. FIG. 7(a) is the same as FIG. 4 and shows the changes over time in the indoor temperature, wall temperature, and air conditioning capacity when cooling is performed based on the intake temperature (indoor temperature) and the set temperature. Meanwhile, FIG. 7(b) shows the changes over time in the indoor temperature, wall temperature, and air conditioning capacity of the air conditioning system 1000 in this embodiment. Compared to the air conditioning capacity 330, indoor temperature 332, and wall temperature 334 in FIG. 7(a), the changes in the air conditioning capacity 360, indoor temperature 362, and wall temperature 364 in FIG. 7(b) are smaller. In other words, by considering not only the intake temperature (indoor temperature) and the set temperature but also the wall temperature, fluctuations in the air conditioning capacity are suppressed, and increases in energy consumption are suppressed.

[0038] The operation of the air conditioning system 1000 configured as described above will now be described. FIG. 8 is a flowchart showing the processing procedure performed by the air conditioner 100. The setting unit 110 receives input of a set temperature (step S10). The indoor temperature detection unit 20 detects the indoor temperature (step S12), and the wall temperature detection unit 22 detects the wall temperature (step S14). The calculation unit 146 calculates ΔT based on the difference between the indoor temperature and the set temperature (step S16). If ΔT<-1°C is not satisfied (N in step S18), the determination unit 148 determines the output value of the air conditioning capacity (refrigeration capacity) based on ΔT (step S20). The determination unit 148 determines the case and performs processing appropriate to the case (step S22). If the absolute value of the correction value is not greater than the threshold value (N in step S24) and the indoor temperature is within the range (Y in step S26), the determination unit 148 corrects the output value using the correction value (step S28).

[0039] If the absolute value of the correction value is greater than or equal to the threshold value (Y in step S24), step S26 is skipped. If the room temperature is not within the range (N in step S26), step S28 is skipped. The air conditioner 100 performs air conditioning based on the output value (step S30) and returns to step S12. If ΔT1<-1°C (Y in step S18), the air conditioner 100's thermostat is turned off (step S32). If ΔT1>0°C is not true (N in step S34), the process waits for one minute (step S36) and returns to step S34. If ΔT1>0°C (Y in step S34), the thermostat is turned on (step S38) and then the process returns to step S12.

[0040] According to this embodiment, the air conditioning capacity is determined as an output value so that the indoor temperature approaches the set temperature, a correction value is determined according to the change in wall temperature over time, and the output value is corrected using the correction value, so that the amount of heat entering through the wall can be reflected in the output value. Furthermore, because the amount of heat entering through the wall is reflected in the output value, the occurrence of excessively high output values ​​of the air conditioning capacity is suppressed. Furthermore, because the occurrence of excessively high output values ​​of the air conditioning capacity is suppressed, an increase in fluctuations in the air conditioning capacity can be suppressed. Furthermore, because an increase in fluctuations in the air conditioning capacity is suppressed, an increase in energy consumption during air conditioning can be suppressed.

[0041] In addition, since the correction value is determined based on the change in wall temperature over time and the output value, the change in wall temperature over time can be reflected in the correction value. Furthermore, if the room temperature is not included in the range centered on the set temperature, the output value is not corrected by the correction value, so the wall temperature can be ignored when the room temperature deviates significantly from the set temperature. Furthermore, if the absolute value of the correction value is equal to or greater than the threshold value, the output value is corrected by the correction value regardless of the value of the room temperature, so correction can be performed regardless of the room temperature when the change in wall temperature over time is large.

[0042] An outline of one aspect of the present disclosure is as follows. (Item 1) An air conditioning system (1000) for conditioning a living space (10), comprising: an air conditioner (100) that delivers conditioned air; an indoor temperature detection unit (20) for detecting an indoor temperature of the living space (10); a wall temperature detection unit (22) for detecting the temperature of a wall surface forming the living space (10); a control unit (120) that adjusts the air conditioning capacity of the air conditioner (100); Equipped with the control unit (120) determines the air conditioning capacity of the air conditioner (100) as an output value so that the indoor temperature approaches a set temperature, then determines a correction value according to a change in the wall temperature over time, and corrects the output value using the correction value; Air conditioning system (1000).

[0043] (Item 2) the control unit (120) determines the correction value based on the time change in the wall temperature and the output value. 10. The air conditioning system (1000) of claim 1.

[0044] (Item 3) the control unit (120) does not correct the output value using the correction value when the room temperature is not included in a range centered on the set temperature; 3. An air conditioning system (1000) according to claim 1 or 2.

[0045] (Item 4) When the absolute value of the correction value is equal to or greater than a threshold value, the control unit (120) corrects the output value using the correction value regardless of the value of the indoor temperature. 4. An air conditioning system (1000) according to claim 3.

[0046] The present disclosure has been described above based on examples. These examples are merely illustrative, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component or each treatment process, and that such modifications are also within the scope of the present disclosure. [Explanation of symbols]

[0047] 10 Living space, 12 Ceiling, 14 Floor, 20 Indoor temperature detection unit, 22 Wall temperature detection unit, 100 Air conditioner, 110 Setting unit, 120 Control unit, 130 Temperature adjustment unit, 140 Input unit, 142 Timing unit, 144 Memory unit, 146 Calculation unit, 148 Determination unit, 150 Output unit, 200 Intake port, 210 Outlet port, 1000 Air conditioning system.

Claims

1. An air conditioning system for air conditioning a living space, an air conditioner that sends out conditioned air; an indoor temperature detection unit that detects the indoor temperature of the living space; a wall temperature detection unit that detects the wall temperature of a wall surface that forms the living space; a control unit that adjusts the air conditioning capacity of the air conditioner; Equipped with The control unit determines the air conditioning capacity of the air conditioner as an output value so that the indoor temperature approaches a set temperature, then determines a correction value according to the change in the wall temperature over time, and corrects the output value using the correction value. Air conditioning system.

2. The control unit determines the correction value based on the time change of the wall temperature and the output value. The air conditioning system of claim 1 .

3. the control unit does not correct the output value using the correction value when the room temperature is not included in a range centered on the set temperature.

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

4. When the absolute value of the correction value is equal to or greater than a threshold value, the control unit corrects the output value using the correction value regardless of the value of the indoor temperature.

4. The air conditioning system of claim 3.

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