JP3997127B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner having a cooling operation mode suitable for sleeping.
[0002]
[Prior art]
In general, air-conditioning control performed during sleep of a person requires air-conditioning control different from normal air-conditioning control performed when a person is awake. This is because the amount of metabolism during sleep of the human body is lower than when waking up, so that comfortable sleep cannot be obtained by performing normal air conditioning control. Therefore, conventionally, a sleep mode called by a name such as “sleep mode” is considered as a cooling operation mode suitable for sleeping, and a cooling operation based on this sleep mode has been performed. In the cooling operation based on the sleep mode generally performed conventionally, after the user has operated for a certain period of time at the indoor set temperature initially set by the user, the room temperature is gradually increased. According to such room temperature control, it is possible to immediately respond to a decrease in metabolic rate during sleep of the human body, and it is possible to obtain a somewhat comfortable sleep as compared with the case where normal cooling operation is performed.
[0003]
[Problems to be solved by the invention]
By the way, it is known that when a person goes to sleep from a state where he / she is awake at bedtime, the awakening level or the sleep depth level is not simply changed but is changed in a complicated manner. For example, these levels repeatedly change so as to increase or decrease, and the amplitude of the level change is large at the beginning of falling asleep and gradually decreases as time elapses. In other words, the human physiological state at the time of falling asleep has changed slightly. Therefore, in order for the user to fall asleep smoothly at bedtime, an indoor thermal environment that matches such a change in the physiological state is required. become.
[0004]
However, the conventional control by the sleep mode is a simple control in which the user first operates for a certain period of time at the indoor set temperature set by the user and then gradually raises the room temperature. It is difficult to obtain an indoor thermal environment that matches the change in state, and some users tend to be unable to sleep for a long time. In particular, the summer in Japan is hot and humid and has a characteristic sleepiness, and the so-called “heat island phenomenon” in recent years has further spurred such sleepiness. For this reason, it is presumed that there are a considerable number of users who are unable to fall asleep smoothly despite the cooling operation in the “sleep mode”.
[0005]
The present invention has been made in view of the above circumstances, and provides an air conditioner that can match a delicate physiological state of a user who wants to fall asleep and can obtain an indoor thermal environment in which the user can fall asleep smoothly. It is an object.
[0006]
[Means for Solving the Problems]
As means for solving the above-mentioned problems, the invention according to claim 1 performs the cooling operation based on the sleep mode control pattern, and further, mode control is started from the start of the mode control obtained by the cooling operation based on the sleep mode control pattern. In the air conditioner, in which the room temperature change characteristic curve until the end is a gradually increasing curve, the room temperature change characteristic curve near the start of the mode control is changed to the operation at the time when the room temperature at the start of the mode control is at bedtime. A gradually decreasing curve that once becomes higher than the set temperature by a predetermined temperature and then lower by a predetermined temperature than the set temperature until a predetermined time elapses thereafter. Then, the room temperature change characteristic curve thereafter becomes a gradually increasing curve in which the room temperature gradually increases, and the sleep mode control pattern is set in a stepwise manner with a predetermined unit time and a predetermined unit temperature as a minimum unit. A pattern in which the harmony target temperature level changes, and the interval between each change time when the air harmony target temperature level changes stepwise is made shorter near the end of mode control. It is characterized by that.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of an air conditioner according to an embodiment of the present invention. In this embodiment, a so-called “reheat dry type” air conditioner including two indoor heat exchangers will be described as an example.
[0019]
In FIG. 1, the refrigerant compressed by the compressor 1 and gasified at high temperature and high pressure passes through the four-way valve 2 (the refrigerant path in the illustrated four-way valve 2 indicates the one during cooling). It is sent to the heat exchanger 3, where it is condensed and liquefied by heat exchange with the outside air to be a high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is squeezed by the electronic expansion valve 4 to become a low-temperature and low-pressure liquid refrigerant and sent to the first indoor heat exchanger 5, and further passes through the electronic expansion valve 6 to the second indoor heat exchanger 7. To be sent to. The low-temperature and low-pressure liquid refrigerant is vaporized by exchanging heat with indoor air in these two indoor heat exchangers 5 and 7 functioning as an evaporator, and becomes a low-temperature and low-pressure gaseous refrigerant. Since the indoor air is deprived of heat by heat exchange with the liquid refrigerant at this time, the room temperature is lowered. The gaseous refrigerant from the second indoor heat exchanger 7 is again sent to the suction side of the compressor 1 through the four-way valve 2, and is compressed by the compressor 1 and repeats the same process as described above. Yes. The electronic expansion valve 6 is fully open except when the reheat dry operation is performed, and when the present invention is described, it is not necessary to consider the reheat dry operation. 5 and the second indoor heat exchanger 7 can be considered as one indoor heat exchanger as a whole.
[0020]
The compressor 1 is rotationally driven by power supply from the inverter device 8, the propeller type outdoor fan 9 is provided in the outdoor heat exchanger 3, and the cross flow type is provided in the indoor heat exchangers 5 and 6. The indoor fans 10 are respectively attached to promote heat exchange. The inverter device 8, the outdoor fan 9, and the indoor fan 10 are controlled by a control signal from the operation control circuit 11. The operation control circuit 11 has a sleep mode control means 12, which is a room temperature set value Ts from the remote controller 13, a room temperature detection value Ta from the room temperature detector 14, and a humidity detector. The humidity detection value Hu from 15 is input, and room temperature control is performed based on a predetermined sleep mode control pattern.
[0021]
FIG. 2 is an explanatory diagram showing a room temperature change characteristic curve according to the present embodiment. This room temperature change characteristic curve representing the room temperature change state from sleep onset to awake has a gradually decreasing region and a gradually increasing region, and the characteristics of the present invention are as shown in the figure in the vicinity of sleep on the room temperature change characteristic curve. A gradual decrease region is provided to cause a large temperature drop between the peak points P1 and P2.
[0022]
That is, it is assumed that the user who is going to go to sleep selects the “sleep mode” by a predetermined operation of the remote controller 13 and sets the set temperature to Ts1. Then, immediately after the start of the control, the sleep mode control means 12 increases the room temperature to the peak point P1 where the temperature is higher by ΔT1 than the set temperature Ts1, and then increases the room temperature to the peak point P2 where the temperature is lower by ΔT2. I try to lower it. Thus, by providing the gradual decrease region having a large temperature drop ΔT2 between the peak points P1 and P2, the user can smoothly enter the sleep state. Note that the change characteristics of the gradually increasing region following the gradually decreasing region are the same as those in the conventional art.
[0023]
Next, the reason why such a gradually decreasing region is provided will be described. FIG. 3 is a sleep state characteristic diagram showing a state in which so-called “non-REM sleep” and “REM sleep” appear alternately and periodically. As shown in this figure, it is said that humans repeat the alternation between non-REM sleep and REM sleep approximately every 4 to 5 times during the night, and the non-REM sleep during sleep is the most. The depth of sleep is deep.
[0024]
On the other hand, human sensation of cold is determined by the amount of metabolism and the amount of heat released from the skin. FIG. 4 is a characteristic diagram showing changes in the metabolic rate from sleep onset to awakening. As shown in this figure, the human metabolic rate begins to decrease soon after falling asleep, but this time is non-REM sleep. And in non-REM sleep shortly after falling asleep, the body temperature drop at the time of shifting from a shallow sleep depth to a deep sleep depth becomes remarkable, and at this time, a severe sweat phenomenon is often accompanied. This sweating phenomenon makes humans feel hot and uncomfortable, preventing them from going deep sleep. Therefore, in order to suppress such a sweating phenomenon at the time of falling asleep, it is only necessary to match the drop in the room temperature with the drop in the body temperature, that is, the drop in the drop in body temperature.
[0025]
In this way, by combining the drop in room temperature with the drop in body temperature, non-REM sleep at the time of falling asleep can be smoothly transferred to a state where the sleep depth is deep, and sleep can be improved. . However, if the room temperature is lowered too much in this case, the sweating phenomenon can be sufficiently suppressed, but this time a feeling of coldness is felt on the contrary, and the body is burdened. Therefore, in the present invention, a necessary temperature drop is ensured by once raising the room temperature above the set temperature set by the user and then lowering the room temperature. However, even if the room temperature is raised once, if it is raised to a level exceeding the body temperature, the heat release from the skin will be hindered and will have an adverse effect, so the degree of the rise should be suppressed to about 38 degrees that does not exceed the body temperature. I have to.
[0026]
In the room temperature change characteristic curve of the present invention shown in FIG. 2, a gradual decrease region in which a large temperature drop ΔT2 is generated between the peak points P1 and P2 is provided for the above reason. The impression of falling asleep and waking up is particularly important for humans to get a good night's sleep. By providing such a gradually decreasing area at the time of falling asleep, the indoor thermal environment allows a smooth sleep. Can be obtained, and sufficient satisfaction can be obtained and high-quality sleep can be obtained.
[0027]
FIG. 5 is an explanatory diagram showing an example of a sleep mode control pattern performed by the sleep mode control means 12 of the operation control circuit 11 in FIG. 1 to realize the room temperature change characteristic of FIG. The horizontal axis in FIG. 5 is a time axis with a unit of time of every 15 minutes as a minimum unit, and the vertical axis is a temperature axis for “target temperature-set temperature” with a unit of step at every 0.5 ° C. as a minimum unit. It is. Here, the “set temperature” is a temperature set by the user operating the remote controller 13 at bedtime, and the “target temperature” is the air conditioning target temperature, and the sleep mode control means 12 controls the room temperature. This is the temperature that is the control target when performing.
[0028]
In the example shown in FIG. 5, once the “sleep mode” is started, the temperature is temporarily increased by 0.5 ° C. from the set temperature for 15 minutes, and then the target temperature is decreased stepwise by 0.5 ° C. The system is operated for 15 minutes at the set temperature, and then is operated for 30 minutes with a temperature lower by 0.5 ° C. than the set temperature as a target temperature. One hour so far is a section corresponding to the gradually decreasing region in FIG. After that, it becomes a section corresponding to a gradually increasing region, and the target temperature is increased stepwise by 0.5 ° C. every 2.5 hours, 2 hours, 1.5 hours and 1 hour, respectively. I have to.
[0029]
Next, the operation when the cooling operation is performed based on the sleep mode control pattern shown in FIG. 5 will be described. For example, assume that the user operates the remote controller 13 at bedtime, sets “sleep mode” for 8 hours from 0:00 am to 8:00 am, and sets the indoor set temperature Ts to 26 ° C. However, it is assumed that the cooling operation in the normal mode has been performed before that, and the compressor 1, the outdoor fan 9, and the indoor fan 10 are being driven. Therefore, the electronic expansion valve 4 is throttled to the opening for the normal mode, and the electronic expansion valve 6 is fully opened. In this example, humidity control is not performed, and the humidity detection value Hu from the humidity detector 15 is not considered.
[0030]
The sleeping mode control means 12 starts the control of “sleep mode” when the time reaches midnight. That is, the sleep mode control means 12 sets the initial air conditioning target temperature to 26.5 ° C., which is 0.5 ° C. higher than the set temperature of 26 ° C., and the room temperature detection value Ta from the room temperature detector 14 is 26.5 ° C. An inverter frequency command is output to the inverter device 8 so as to approach the temperature. Then, AC power having a frequency related to the inverter frequency command is output from the inverter device 8 to perform variable speed control of the compressor 1, thereby heat in the first indoor heat exchanger 5 and the second indoor heat exchanger 7. The exchange amount is controlled and the room temperature is controlled.
[0031]
Next, the sleep mode control means 12 lowers the air conditioning target temperature to 26 ° C. which is the same as the set temperature at 0:15 am, and further sets the air conditioning target temperature to 25.5 between 0:30 am and 1 am. Reduce to ° C. By such control, the room temperature can be lowered by about 1 ° C. in accordance with the drop in the body temperature of the user during one hour from midnight to 1:00 am when the user falls asleep, that is, during the room temperature gradually decreasing region period. it can. Therefore, the user can smoothly shift from a shallow sleep depth to a deep sleep depth in non-REM sleep shortly after falling asleep, and can enter the subsequent sleep comfortably without causing discomfort.
[0032]
Then, after 1 am when the room temperature gradually decreasing region period ends, the room temperature gradually increasing region period is entered, and the sleep mode control means 12 raises the air conditioning target temperature from 25.5 ° C. to 26 ° C., which is the same as the set temperature, The operation at 26 ° C. is continued for 2.5 hours until 3:30 am. Further, the sleeping mode control means 12 sets the air conditioning target temperature for 2 hours from 3:30 am to 5:30 am for 1.5 hours from 5:30 am to 7:30 am The air conditioning target temperature is set to 27 ° C., and the air conditioning target temperature from 7 am to 8 am is 27.5 ° C. Thus, the sleep mode control means 12 increases the air conditioning target temperature step by step in 0.5 ° C increments after the gradual decrease region ends. In this case, a period for maintaining the increased air conditioning target temperature, That is, the interval between each increase time when the level of the air conditioning target temperature increases stepwise is shortened as the “sleep mode” end time approaches. As shown in the sleep state characteristic diagram of FIG. 3, non-REM sleep with a deep sleep depth and easy to feel heat appears in the first half of the sleep period, so the rise in room temperature during this first half period should be somewhat moderate. It is because it is preferable.
[0033]
As described above, in this embodiment, the room temperature gradually decreasing region is provided in the vicinity of the control start of the “sleep mode” so that the user can obtain a good sleep and the first half also in the subsequent room temperature gradually increasing region. By making the degree of increase in room temperature moderate, stable sleep can be continued.
[0034]
In the above example, the operation time of the “sleep mode” is 8 hours, the range of change when the air conditioning target temperature increases or decreases stepwise is 0.5 ° C., and this air conditioning target temperature is gradually increased. The interval between each increase time when the value increases stepwise is 2.5 hours, 2 hours, 1.5 hours, 1 hour, etc., but the remote controller 13 has mode control for changing these control conditions. Condition changing means is provided, and the user can change these control conditions by performing a predetermined operation on the remote controller 13.
[0035]
The control pattern of “sleep mode” shown in FIG. 5 is for the case where the operation time set by the user is 8 hours, and “target temperature-set temperature” at the end of “sleep mode”, that is, the set temperature. However, in the present invention, even if the user sets the operation time of the “sleep mode” to be shorter, the user can change the shape of the control pattern in FIG. 5 without changing the shape of the control pattern. The control pattern for the set operation time is used as it is.
[0036]
For example, FIG. 6 is an explanatory diagram showing a control pattern when the user sets the operation time of “sleep mode” to 6 hours. This control pattern is a pattern of 0 to 6 hours of the control pattern of FIG. It was used as it was without changing the shape. That is, since the shift amount at 6:00 am in the control pattern of FIG. 5 is 1 ° C., the shift amount at 6:00 am, which is the end of operation, is also 1 ° C. in the control pattern of FIG. If the shift amount at the end of the “sleep mode” in FIG. 5 is 1.5 ° C., the shift amount at the end of the “sleep mode” in FIG. There is a risk that the user may feel uncomfortable due to a significant temperature rise. In the present embodiment, such an excessive shift is avoided, so that the user can always obtain a comfortable indoor thermal environment even if the control conditions of the “sleep mode” are variously changed.
[0037]
By the way, “room temperature” when the sleep mode control means 12 performs the room temperature control as described above is expressed by the dry bulb temperature. However, even if the room temperature is the same, everyone has experienced that the heat and cold actually felt differ between when the humidity is high and when the humidity is low. Therefore, in order to realize a more comfortable indoor thermal environment for the user, it is preferable to perform room temperature control using a temperature reflecting such humidity. The bedtime mode control means 12 in FIG. 1 can perform room temperature control using the temperature reflecting the humidity (relative humidity), that is, the sensible temperature, based on the input of the humidity detection value Hu from the humidity detector 15. is there. In this case, room temperature control is performed assuming that a change of about 15% in relative humidity corresponds to a change in dry bulb temperature of 1 ° C.
[0038]
FIG. 7 is an explanatory diagram showing a room temperature change characteristic curve in the case of using a sensible temperature reflecting the relative humidity. FIGS. 8 and 9 are control patterns for realizing the room temperature change characteristic of FIG. It is explanatory drawing which shows an example. 7, 8, and 9 have the same characteristics or control patterns as those in FIGS. 2, 5, and 6, respectively. The differences are the “room temperature” and “setting” on the vertical axis in each characteristic diagram. “Temperature” and “Target temperature” are respectively “Indoor body temperature”, “Set body temperature”, and “Target body temperature”.
[0039]
In addition to the sensory temperature reflecting the relative humidity as described above, the sensory temperature reflecting the wind speed can also be used. In this case, the sleep mode control means 12 inputs a detection value from an anemometer (not shown) provided near the outlet of the indoor unit, and a predetermined change in the wind speed corresponds to a change in the dry bulb temperature of 1 ° C. As a result, room temperature control is performed.
[0040]
FIG. 10 is an explanatory diagram of another sleep mode control pattern used by the sleep mode control means 12. In the example shown in FIG. 2, the gradual decrease area appears only once immediately after the start of control. However, in the example of FIG. 10, after the transition from the gradual decrease area to the gradual increase area, the gradual decrease area again appears in the gradually increase area. The pattern that appears. In the sleep state characteristic diagram of FIG. 3, after going to sleep, after entering non-REM sleep and deepening the sleep depth, going into REM sleep, the sleep depth becomes shallow, and going into non-REM sleep again, the sleep depth becomes shallow It is intended to realize a room temperature change characteristic faithfully corresponding to the phenomenon that the pattern is repeated.
[0041]
However, as is apparent from the characteristic diagram of FIG. 3, the non-REM sleep that appears at the second time has a shorter period and a shallower sleep depth than the first non-REM sleep. Therefore, in the control pattern of FIG. 10, the second time (30 minutes) is made shorter than the first time (75 minutes) for the period of the gradual decrease region, and the second time (0.5 ° C.) is also set for the temperature decrease width in this period. It is smaller than the first time (1.5 ° C.). According to such a control pattern of FIG. 10, it is possible to perform finer room temperature control, and the user can obtain more comfortable sleep.
[0042]
Next, humidity control in the present invention will be described. In the embodiments described so far, except for the case where the sensible temperature is used, basically room temperature control based only on the dry bulb temperature, that is, normal temperature control is performed, and humidity control is not performed. However, during the execution of the control in the “sleep mode”, it is sometimes preferable from the viewpoint of control stability to perform humidity control in addition to temperature control.
[0043]
For example, in the characteristic diagram shown in FIG. 2, when the room temperature is gradually increased in the gradually increasing region, if the cooling capacity of the air conditioner is too large with respect to the cooling load, the compressor 1 stops and evaporates. Since the moisture retained on the indoor unit side functioning as a container is released into the room, the humidity in the room may increase significantly. Such a significant increase in humidity has a great influence on the room temperature, and there is a possibility that stable room temperature control cannot be performed. FIG. 11 is a characteristic example showing changes in the room temperature and the room humidity in such a case. It is clear that the temperature is also unstablely changed because the humidity has been remarkably increased over a certain period. It has become.
[0044]
Therefore, in order to avoid such an unstable temperature change, the sleep mode control means 12 in FIG. 1 is unable to control the room temperature only by controlling the dry bulb temperature in view of the balance between the cooling load and the cooling capacity. When it is determined, humidity control is performed. FIG. 12 is a chart showing an example of the contents of such humidity control. In this example, the control is performed assuming that a change of about 15% of the relative humidity corresponds to a change of the dry bulb temperature of 1 ° C. . In this chart, only the temperature is the control factor during the initial period, and the control set temperature is increased to 25 ° C, 25.5 ° C, and 26 ° C. At this time, the control set humidity is constant at 50%. It has become. In this period, the final temperature target values are still 25 ° C., 25.5 ° C., and 26 ° C., which coincide with the set temperature values for control. However, after this, for example, when the humidity is significantly increased by stopping the compressor 1 as described above, the set humidity for control must be increased from 50% to 58%. At this time, even if the final temperature target value is 26.5 ° C., if the control set temperature is also 26.5 ° C., the temperature rises significantly as shown in FIG. 11, resulting in unstable temperature control. End up. Therefore, an increase of 8% in humidity is regarded as an increase in temperature of 0.5 ° C., and this amount is subtracted to set 26 ° C. as a control set value. Similarly, the set humidity for control further increases to 65% after this, but the final temperature target value is also set to 26 ° C. by subtracting this humidity increase.
[0045]
FIG. 13 is a characteristic example showing changes in the room temperature and the room humidity when the humidity control as described above is performed. The characteristics shown in FIG. 13 are very stable and preferable as the characteristics of the sleep mode, as is clear from comparison with the characteristics shown in FIG. Note that the humidity control in this case is performed by a so-called “over-throttle operation” in which the opening degree of the electronic expansion valve 4 in FIG. In addition to the humidity control, the electronic expansion valve 4 is fully opened and the electronic expansion valve 6 is in a throttled state so that the first indoor heat exchanger 5 functions as a condenser like the outdoor heat exchanger 3. There is “reheat drying operation”, but in this reheat drying operation, the temperature rise in the room becomes too large, and it becomes difficult to obtain stable temperature characteristics. Therefore, the sleeping mode control means 12 in this embodiment shall perform humidity control by execution of the above overdraw operation.
[0046]
【The invention's effect】
As described above, according to the present invention, the room temperature change characteristic curve near the start of mode control is such that the room temperature at the start of mode control is once higher than the set temperature based on the operation at bedtime by a predetermined temperature, After that, until the predetermined time elapses, a gradually decreasing curve that is lower than the set temperature by a predetermined temperature is obtained, and the subsequent room temperature change characteristic curve is a gradually increasing curve in which the room temperature gradually increases. Furthermore, the sleep mode control pattern is a pattern in which the air conditioning target temperature level changes stepwise with the predetermined unit time and the predetermined step temperature as a minimum unit, and the air conditioning target temperature level changes stepwise. Since the interval between each change point when doing so is configured to be short near the end of mode control, It is possible to realize an air conditioner that can match a delicate physiological state of a user who is going to fall asleep and can obtain an indoor thermal environment in which the user can fall asleep smoothly.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an air conditioner according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a room temperature change characteristic curve according to the embodiment of the present invention.
FIG. 3 is a sleep state characteristic diagram for explaining the reason why a gradual decrease area is provided in the characteristic curve of FIG. 2;
4 is a metabolic rate change state characteristic diagram for explaining the reason why a gradual decrease region is provided in the characteristic curve of FIG. 2;
5 is an explanatory diagram showing an example of a sleep mode control pattern performed by the sleep mode control unit 12 of the operation control circuit 11 in FIG. 1 to realize the room temperature change characteristic in FIG. 2;
FIG. 6 is an explanatory view similar to FIG. 5 when the operation time is shortened.
7 is an explanatory diagram showing a room temperature change characteristic curve in the case of using a sensible temperature in which relative humidity is reflected, corresponding to FIG.
8 is an explanatory diagram showing an example of a control pattern for realizing the room temperature change characteristic of FIG. 7, corresponding to FIG.
9 is an explanatory diagram showing an example of a control pattern for realizing the room temperature change characteristic of FIG. 7, corresponding to FIG.
10 is an explanatory diagram of another sleep mode control pattern used by the sleep mode control means 12 in FIG. 1. FIG.
FIG. 11 is a characteristic diagram of the room temperature and the room humidity showing an unstable change due to a significant increase in humidity.
12 is a table showing an example of the content of humidity control performed in the embodiment of the present invention in order to avoid the unstable change state of FIG.
13 is a characteristic diagram of the room temperature and the room humidity showing a stable change state obtained as a result of the humidity control according to FIG.
[Explanation of symbols]
1 Compressor
2 Four-way valve
3 outdoor heat exchanger
4 Electronic expansion valve
5 First indoor heat exchanger
6 Electronic expansion valve
7 Second indoor heat exchanger
8 Inverter device
9 Outdoor fan
10 Indoor fans
11 Operation control circuit
12 Sleeping mode control means
13 Remote control
14 Room temperature detector
15 Humidity detector
Ts Room temperature set value
Ta room temperature detection value
Hu humidity detection value
P1, P2 peak point
ΔT1, ΔT2 Temperature drop
Ts1 set temperature

Claims (1)

The cooling operation based on the sleep mode control pattern is performed, and the room temperature change characteristic curve from the start of the mode control to the end of the mode control obtained by the cooling operation based on the sleep mode control pattern becomes a gradually increasing curve. In air conditioner,
The room temperature change characteristic curve in the vicinity of the start of the mode control is measured until the room temperature at the start of the mode control is once higher than the set temperature based on the operation at the time of going to bed by a predetermined temperature and then the predetermined time elapses. A gradually decreasing curve that is lower than the set temperature by a predetermined temperature, and a subsequent room temperature change characteristic curve to be a gradually increasing curve in which the room temperature gradually increases ,
Further, the sleep mode control pattern is a pattern in which the air conditioning target temperature level changes stepwise with a predetermined step time and a predetermined step temperature as a minimum unit, and the air conditioning target temperature level changes stepwise. The interval between each change point was made shorter near the end of mode control.
An air conditioner characterized by that.

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