JP5538314B2 - Indoor environment control system - Google Patents

Description

  The present invention relates to an indoor environment control system capable of controlling an indoor environment based on biological information during sleep.

  Conventionally, many air-conditioning controls have been proposed in order to perform comfortable sleep. For example, Patent Document 1 below considers a decrease in metabolic rate associated with falling asleep, and discloses a technique for gradually increasing the room temperature in multiple steps after a certain period of time has elapsed since falling asleep. Patent Document 2 below discloses a technique for controlling the temperature of the air conditioner to be lowered by a decrease in the biological information (heart rate) of a sleeping person during sleep.

  In general, human sleep is roughly classified into REM sleep that is light sleep and non-REM sleep that is deep sleep. During REM sleep, various organs and organs are active, and activities such as increased pulsation, increased blood pressure, increased sweating, and eye movement occur. The high-speed occupancy of this eyeball is called REM (Rapid eye movement). Has been. During non-REM sleep, the body tension is relaxed and the body becomes relaxed, and a deep sleep state such as a pulsation phenomenon, a decrease in blood pressure, and a decrease in the amount of sweating occurs. The sleep state transitions from falling asleep so that sleep becomes shallower, and then the cycle of transitioning so that sleep becomes deeper is usually repeated at a cycle of about 90 minutes, and the sleep depth becomes shallower as it becomes dawn. Since the sleeper's body state varies depending on the dynamically changing sleep state, an indoor environment that matches the body state at that time is required.

JP-A-3-274345 JP 2009-264704 A

  However, according to the above conventional technique (Patent Document 1), in order to make a comfortable state during sleep, the setting of the room temperature and humidity is changed after a predetermined time has elapsed based on a timer. For this reason, there has been a problem that when a sleeping person's body condition changes for some reason, there is a risk of creating an environment unsuitable for the sleeping person.

  Further, according to the conventional technique (Patent Document 2), since the set temperature is changed by the change of the heart rate, which is a biological signal, it is possible to cope with the change in the state of the sleeping person's body. It is constant. For this reason, when the heart rate frequently changes in the vicinity of the threshold value, the set temperature also changes frequently, resulting in a problem that optimal air conditioning control cannot be performed. In particular, the sleep depth of a sleeper becomes shallower as it becomes dawn. For this reason, when the sleep state determination threshold is constant, there is a problem that the sleep depth determination at dawn is not performed correctly and optimal air conditioning control cannot be performed.

  This invention is made in view of the above, Comprising: It aims at obtaining the indoor environment control system which can be controlled to the indoor environment suitable for the sleeper whose biometric information changes.

  In order to solve the above-described problems and achieve the object, the present invention is an indoor environment control system for controlling indoor environment control equipment, and periodically acquires biological information of a sleeping person who is a sleeping person The sleep depth is determined based on the result of comparing the biometric information acquisition means for outputting the biometric information signal based on the acquired biometric information, the current value of the biometric information signal, and the determination threshold held by itself. A sleep state determination means, a threshold change means capable of changing the determination threshold, and a device control means for controlling an indoor environment control device based on the sleep depth.

  According to the present invention, it is possible to control the indoor environment suitable for a sleeping person whose biometric information changes.

FIG. 1 is a diagram illustrating an indoor installation example of the indoor environment control system according to the first embodiment. FIG. 2 is a diagram illustrating a configuration example of the indoor environment control system according to the first embodiment. FIG. 3 is a diagram illustrating a sleep state based on the biological information signal SL_sig and the determination threshold TH1. FIG. 4 is a diagram illustrating an example of setting the determination threshold value overnight with the determination threshold value changing with time. FIG. 5 is a flowchart showing an air conditioning control operation when the determination threshold changes with time. FIG. 6 is a diagram illustrating a configuration example of the set target value table. FIG. 7 is a flowchart showing an air conditioning control operation in the case where the determination threshold changes depending on the sleep cycle. FIG. 8 is a flowchart showing the air conditioning control operation in the case where the determination threshold is multistage. FIG. 9 is a diagram illustrating a sleep state determination example using a multi-stage determination threshold. FIG. 10 is a diagram illustrating an example of the determination threshold when each of the plurality of determination thresholds is changed. FIG. 11 is a diagram illustrating an indoor installation example of the indoor environment control system according to the second embodiment. FIG. 12 is a diagram illustrating a configuration example of an indoor environment control system and an air conditioner according to the second embodiment.

  Embodiments of an indoor environment control system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating an indoor installation example of the indoor environment control system according to the present embodiment. Here, as an example, a case where the indoor environment control device is an air conditioner will be described. As shown in FIG. 1, the indoor environment control system is a system built in an air conditioner 100 installed indoors, and obtains biological information of a sleeping person who is a sleeping person to obtain an air conditioner. 100 control is performed. Here, the air conditioner 100 sets a room where a sleeping person is present as an air-conditioning target. The ecological information acquisition unit 2 shown in FIG. 1 will be described later.

  Next, the configuration of the indoor environment control system will be described. FIG. 2 is a diagram illustrating a configuration example of the indoor environment control system 1. The indoor environment control system 1 is connected to a biological information acquisition unit 2 that detects biological information of a sleeping person using a biological sensor, and the biological information acquisition unit 2, and determines a sleep state based on a determination threshold for the detected biological information. Sleep state determination unit 3, threshold change unit 4 that determines and updates whether the determination threshold is appropriate for the current sleep state, and a device that changes the set temperature and set humidity of air conditioner 100 based on the sleep state of the sleeper And a control unit 5. In FIG. 2, only the configuration of the main part according to the present embodiment is shown, and various components that are normally provided in the air conditioner 100 such as a blower fan and a refrigeration cycle are not shown.

  The biometric information acquisition unit 2 is a sensor that acquires biometric information that changes according to the sleeping state of the sleeping person. For example, in the case of a sensor installed in the front part of the air conditioner 100 as shown in FIG. 1, it is a sensor that can be acquired without contact with a sleeping person, such as a Doppler radar sensor, pyroelectric sensor, thermopile sensor, or camera. The biological information acquisition unit 2 detects biological information (such as body movement, heartbeat, and body surface temperature) of a sleeping person, and a biological information signal (such as presence or absence of body movement and the number of times around a predetermined time of the heartbeat) indicating the biological information. Is output to the sleep state determination unit 3. As the output timing, the biological information acquisition unit 2 detects the biological information of the sleeping person once every predetermined time T1 seconds (for example, 30 seconds), and uses the biological information signal generated from the biological information as the sleep state determination unit. 3 is output. The indoor environment control system 1 can detect that the target person has gone to sleep based on this biological information.

  The sleep state determination unit 3 holds a determination threshold and determines the sleep state of the sleeping person based on the biological information signal output by the biological information acquisition unit 2.

  Here, the sleep state will be described. In general, human sleep is roughly classified into REM sleep that is light sleep and non-REM sleep that is deep sleep. International standards further define six sleep states: wakefulness, REM sleep, and sleep depths 1, 2, 3, and 4. The sleep depths 1 to 4 are obtained by dividing the non-REM sleep into four stages. Among the non-REM sleeps, the sleep depth 1 is the shallowest sleep and the sleep depth 4 is the deepest sleep state. Hereinafter, sleep depths 1 and 2 are referred to as shallow sleep, and sleep depths 3 and 4 are referred to as deep sleep.

  During REM sleep, various organs and organs are active, and activities such as increased pulsation, increased blood pressure, increased sweating, and eye movement occur. The high-speed occupancy of this eyeball is called REM (Rapid eye movement). Has been. During non-REM sleep, the body tension is relaxed and the body becomes relaxed, and a deep sleep state such as a pulsation phenomenon, a decrease in blood pressure, and a decrease in the amount of sweating occurs. The sleep state transitions to deep sleep, shallow sleep, REM sleep and sleep after going to sleep, and then the cycle of transition to deeper REM sleep, shallow sleep, deep sleep and sleep is usually about 90 minutes. Repeatedly, the depth of sleep becomes shallower at dawn.

  FIG. 3 is a diagram illustrating a sleep state based on the biological information signal SL_sig and the determination threshold TH1. The biological information signal SL_sig is a signal indicating that the closer to 100 is the awake state, and the closer to 0 is the deeper sleep state. The determination threshold TH1 is a constant value. The sleep depth indicates the sleep state of the sleeper, and the sleep state is shallow sleep and the wakeless state is deep sleep. When the biological information acquisition unit 2 outputs the biological information signal SL_sig shown in FIG. 3, the sleep state determination unit 3 compares the stored determination threshold TH1 for determining the sleep depth and the biological information signal SL_sig at that time. If the value of the biometric information signal SL_sig is lower than the determination threshold TH1, the sleep is determined to be deep sleep. As indicated by the sleep depth, fluttering occurs in the portion where the biological information signal SL_sig changes before and after the determination threshold value TH1.

  The threshold change unit 4 includes a threshold change timer 41 that measures the time after the sleeper has fallen asleep, and a sleep cycle count unit 42 that counts transitions between sleep states of deep sleep and shallow sleep. The threshold value changing unit 4 changes the determination threshold value from TH1 to TH2 larger than TH1 after a predetermined time T2 (for example, 180 minutes) from the start of sleep. The timing of the start of sleep can be detected from the biological information signal. FIG. 4 shows an example of setting the determination threshold value overnight with the determination threshold value changing with time. As shown in FIG. 4, it is a feature of this control that the determination threshold is changed with time. At this time, in the part surrounded by a circle in FIG. 4, there is a fluctuation near the determination threshold value, but the fluctuation can be reduced as compared with FIG. 3.

  The device control unit 5 sets the indoor environment target values (temperature, humidity, wind direction, air volume, etc.) according to the sleep state determined by the sleep state determination unit 3, and the air conditioner 100 ejection temperature, humidification / Control the dehumidification and the rotational speed of the outdoor compressor, and build an environment so that the indoor temperature and humidity become the target values.

  Each block having the configuration shown in FIG. 1 is processed by an electronic circuit including a microcomputer to control the entire indoor environment control system 1.

  Subsequently, an air conditioning control operation will be described as an indoor environment control operation of the indoor environment control system 1 in the present embodiment. FIG. 5 is a flowchart showing an air conditioning control operation when the determination threshold changes with time.

  First, when the indoor environment control system 1 is activated, the threshold value changing unit 4 detects the sleeping time of the sleeping person based on the biological information signal, and stores the start time T0 that is the sleeping time of the sleeping person (step S0). S1). At this time, the determination threshold held by the sleep state determination unit 3 is TH1. Thereafter, the biometric information acquisition unit 2 waits until the time T1 elapses (step S2: No), and detects and acquires the biometric information of the sleeping person every time the T1 time elapses (step S2: Yes) (step S3). ). Then, the biological information acquisition unit 2 outputs a biological information signal generated based on the biological information (for example, a biological information signal SL_sig as shown in FIG. 3) to the sleep state determination unit 3 (step S4).

  The sleep state determination unit 3 that has received the biological information signal compares the current biological information signal value with a determination threshold value (TH1 for the first time) (step S5), and the biological information signal value is determined to be a determination threshold value TH1 (for example, , 60) If it is greater than or equal to (step S5: Yes), it is determined as “light sleep” (step S6). Then, the sleep state determination unit 3 outputs the determination result to the device control unit 5.

  The device control unit 5 that has received the determination result of the sleep state sets a target value of the air conditioner 100 according to “light sleep”, and the ejection temperature and wind direction of the air conditioner 100 so that the indoor environment becomes the target value. Control the air volume, the rotational speed of the outdoor compressor, etc. (step S7). FIG. 6 is a diagram illustrating a configuration example of the set target value table. When the indoor environment control system 1 holds a set target value table set in consideration of energy saving and comfort as shown in FIG. 6 and the sleep state determination unit 3 outputs light sleep, the device control unit 6 is a target value such as “target temperature: 26 ° C.”, “target humidity: 45%”, “wind direction: upward”, “human feeling: wind protection”, “compressor drive: high speed”, based on the target value table of FIG. The air conditioner 100 is controlled.

  On the other hand, the sleep state determination unit 3 compares the value of the current biological information signal with the determination threshold (step S5), and the value of the biological information signal is smaller than the determination threshold TH1 (for example, 60) (step S5: No). ) And “deep sleep” (step S8). Then, the sleep state determination unit 3 outputs the determination result to the device control unit 5.

  Upon receiving the sleep state determination result, the device control unit 5 sets the target value of the air conditioner 100 according to “deep sleep”, and the ejection temperature and wind direction of the air conditioner 100 so that the indoor environment becomes the target value. Control the air volume, the rotational speed of the outdoor compressor, etc. (step S9). When the sleep state determination unit 3 outputs deep sleep, the device control unit 5 determines that “target temperature: 28 ° C.”, “target humidity: 50%”, “wind direction: upward”, “human feeling: from the target value table of FIG. The air conditioner 100 is controlled so as to achieve a target value such as “windbreak” and “compressor drive: low speed”.

  Note that these set values shown in FIG. 6 are examples, and the present invention is not limited to them. For example, the target temperature can be changed to 27 ° C. during deep sleep, the target humidity can be set to 40% during shallow sleep, or the like within a range that does not become uncomfortable depending on personal preference / installation environment.

  Next, when the threshold value changing unit 4 acquires the elapsed time from the start of control (start time T0) to the present time when the biometric information is acquired and is equal to or longer than the predetermined time T2 (step S10: Yes), The determination threshold value held by the sleep state determination unit 3 is changed from TH1 to TH2 (step S11). Thereafter, the sleep state determination unit 3 determines the sleep depth using the determination threshold value TH2. As shown in FIG. 3 and FIG. 4, when the determination threshold is changed, deep sleep can be correctly determined in the depth determination in the latter half of sleep than when it is not changed, and an air conditioning environment that is more suitable for the sleep state is applied. Is possible. Note that the determination threshold value TH1 is continued before the predetermined time T2 has elapsed (step S10: No). Then, the above operation (steps S2 to S11) is repeated until the end of control.

  In addition, the timing for changing the determination threshold does not have to be time, for example, it is determined by the progress of the sleep cycle (number of changes from shallow sleep to deep sleep or conversely the number of changes from deep sleep to shallow sleep). May be. In this case, considering the flutter of the first half of sleep, the number of changes is counted when the deep sleep state and the shallow sleep state continue for a predetermined time T3 (for example, 15 minutes) or longer. FIG. 7 is a flowchart showing an air conditioning control operation in the case where the determination threshold changes depending on the sleep cycle.

  First, when the indoor environment control system 1 is activated, the threshold value changing unit 4 resets the shallow sleep count and the deep sleep count to 0 in the sleep cycle count unit 42 (step S21). At this time, the determination threshold held by the sleep state determination unit 3 is TH1. Thereafter, the biometric information acquisition unit 2 stands by until the time T1 elapses (step S22: No), and detects and acquires the sleeper's biometric information every time the time T1 elapses (step S22: Yes) (step S23). ). Then, the biological information acquisition unit 2 outputs a biological information signal generated based on the biological information (for example, a biological information signal SL_sig as shown in FIG. 3) to the sleep state determination unit 3 (step S4).

  The sleep state determination unit 3 that has received the biological information signal compares the value of the current biological information signal with the determination threshold (step S25), and the value of the biological information signal is equal to or greater than the determination threshold (TH1 in the first half of sleep) ( Step S25: Yes), it is determined as “light sleep” (step S26). Then, the sleep state determination unit 3 outputs the determination result to the device control unit 5.

  The device control unit 5 that has received the determination result of the sleep state sets a target value of the air conditioner 100 according to “light sleep”, and the ejection temperature and wind direction of the air conditioner 100 so that the indoor environment becomes the target value. Control the air volume, the rotational speed of the outdoor compressor, etc. (step S27). Since the control method of the air conditioner 100 is the same as step S7 of the flowchart of FIG. 5, detailed description thereof is omitted.

  Next, when the sleep state immediately before (previous) in the sleep state determination unit 3 is shallow sleep (step S28: Yes), the threshold value changing unit 4 counts the shallow sleep duration (step S29).

  On the other hand, when the sleep state immediately before (previous) in the sleep state determination unit 3 is deep sleep (step S28: No), the threshold value changing unit 4 has a shallow sleep duration time equal to or longer than a predetermined time T3 (for example, 15 minutes). In the case of (Step S30: Yes), the light sleep count is incremented by 1 (Step S31). When the shallow sleep duration is less than the predetermined time T3 (step S30: No), the threshold changing unit 4 resets the shallow sleep duration (step S32).

  Returning to step S25, when the value of the biological information signal is smaller than the determination threshold value (TH1 in the first half of sleep) (step S25: No), the sleep state determination unit 3 determines “deep sleep” (step S33). Then, the sleep state determination unit 3 outputs the determination result to the device control unit 5.

  Upon receiving the sleep state determination result, the device control unit 5 sets the target value of the air conditioner 100 according to “deep sleep”, and the ejection temperature and wind direction of the air conditioner 100 so that the indoor environment becomes the target value. Control the air volume, the rotational speed of the outdoor compressor, etc. (step S34). Since the control method of the air conditioner 100 is the same as step S9 in the flowchart of FIG. 5, detailed description thereof is omitted.

  Next, when the sleep state immediately before (previous) in the sleep state determination unit 3 is deep sleep (step S35: Yes), the threshold value changing unit 4 counts the deep sleep duration (step S36).

  On the other hand, when the sleep state immediately before (previous) in the sleep state determination unit 3 is shallow sleep (step S35: No), the threshold change unit 4 has a shallow sleep duration of a predetermined time T3 (for example, 15 minutes) or more. In the case of (step S37: Yes), the deep sleep count is incremented by 1 (step S38). When the deep sleep duration is less than the predetermined time T3 (step S37: No), the threshold changing unit 4 resets the deep sleep duration (step S39).

  Thereafter, when both the shallow sleep count and the deep sleep count are equal to or greater than the predetermined number of times T4 (step S40: Yes), the threshold changing unit 4 changes the determination threshold held by the sleep state determining unit 3 from TH1 to TH2 ( Step S41). Thereafter, the sleep state determination unit 3 determines the sleep depth using the determination threshold value TH2. When the number is less than the predetermined number T4 (step S40: No), the determination threshold value TH1 is continued. Then, the above operation (steps S22 to S41) is repeated until the control end time. With the above operation, the sleep cycle is counted, and the determination threshold for determining the sleep depth can be changed by the progress of the sleep cycle estimated from the transition of the sleep depth of the sleeper. Even in this case, as in the case where the determination threshold value is changed based on the elapsed time, it is possible to reduce the flutter of the determination in the second half of sleep as shown in FIG.

  As a method of simplifying the determination threshold value changing method in the air-conditioning control operation described in the flowcharts of FIGS. 5 and 7, for example, it is determined that the time is determined to be a deep sleep state or a light sleep state. The determination threshold value may be changed when a predetermined time or more (for example, 120 minutes) is satisfied.

  Further, the changed determination threshold TH2 may be a preset value, or may be set by an increase / decrease from the determination threshold TH1 (for example, TH1 + 10, TH1-10, etc.). Setting of the determination threshold can be simplified.

  Moreover, although the case where the biological information signal shown in FIG. 3 was used when determining the sleep depth was described, the biological information signal is not limited to this. For example, when the number of body movements is used, the sum of the number of body movements for a predetermined time (for example, 10 minutes) may be equal to or less than the determination threshold TH1 (for example, 3 times or less). It can also be determined as deep sleep. Further, in this case, the time when the number of body movements is less than or equal to a predetermined value may be integrated, and the determination threshold value may be changed to TH2 when the predetermined time T2 has elapsed. Even in this case, the same effect can be obtained.

  Next, the case where the sleep state determination unit 3 has a plurality of determination threshold values will be described. The description so far provides an air-conditioning environment suitable for a sleep state by changing one determination threshold according to the elapsed time from the start of control or counting the sleep cycle and more correctly determining the sleep depth in the latter half of sleep. That made it possible. Unlike the above-described operation, by having a plurality of determination thresholds, it is possible to suppress frequent changes in sleep depth and provide a more suitable indoor environment.

  In this case, the threshold change unit 4 changes the determination threshold according to the sleep state determined by the sleep state determination unit 3. FIG. 8 is a flowchart showing the air conditioning control operation in the case where the determination threshold is multistage.

  First, when the indoor environment control system 1 is activated, the threshold value changing unit 4 stores a start time T0 that is a time when the sleeper has fallen asleep (step S51). At this time, the threshold change unit 4 sets the sleep state to light sleep (step S52), and sets the determination threshold of the sleep state determination unit 3 to TH3 (step S53).

  Thereafter, the biometric information acquisition unit 2 stands by until the time T1 elapses (step S54: No), and detects and acquires the sleeper's biometric information every time the T1 time elapses (step S54: Yes) (step S55). ). And the biometric information acquisition part 2 outputs the biometric information signal produced | generated based on biometric information to the sleep state determination part 3 (step S56).

  The sleep state determination unit 3 that has received the biological information signal compares the value of the current biological information signal with the determination threshold (step S57), and the value of the biological information signal is equal to or greater than the determination threshold (TH3 for the first time). (Step S57: Yes), it determines with "light sleep" (step S58). Then, the sleep state determination unit 3 outputs the determination result to the device control unit 5. At this time, the threshold change unit 4 sets the determination threshold held by the sleep state determination unit 3 to TH3 (step S59). The device control unit 5 sets the target value of the air conditioner 100 according to “light sleep”, and the air temperature, the air direction, the air volume, and the rotation of the outdoor compressor so that the indoor environment becomes the target value. The number and the like are controlled (step S60). Since the control method of the air conditioner 100 is the same as step S7 in the flowchart of FIG. 5 and the like, detailed description thereof is omitted.

  On the other hand, the sleep state determination unit 3 compares the current value of the biological information signal with the determination threshold (step S57), and if the value of the biological information signal is smaller than the determination threshold (TH3 for the first time) (step S57: No), it is determined as “deep sleep” (step S61). Then, the sleep state determination unit 3 outputs the determination result to the device control unit 5. At this time, the threshold change unit 4 sets the determination threshold held by the sleep state determination unit 3 to TH4 (step S62). The device control unit 5 sets the target value of the air conditioner 100 according to “deep sleep”, and the air temperature, the air direction, the air volume, and the rotation of the outdoor compressor so that the indoor environment becomes the target value. The number is controlled (step S63). Since the control method of the air conditioner 100 is the same as step S9 in the flowchart of FIG. 5 and the like, detailed description thereof is omitted. Thereafter, the above operation (steps S54 to S63) is repeated until the end of control.

  Thus, the threshold value changing unit 4 that has received the sleep state determination result indicates that the current sleep state is “deep sleep” when the determination result received when the last sleep state is “shallow sleep”. Update to “deep sleep” and change the determination threshold held by the sleep state determination unit 3 to TH4. The threshold value changing unit 4 that has received the sleep state determination result sets the current sleep state to “shallow sleep” if the determination result received when the previous sleep state is “deep sleep” is “shallow sleep”. And the determination threshold value held by the sleep state determination unit 3 is changed to TH3. As a result, even if the biological information signal fluctuates in the vicinity of the determination threshold after the sleep state changes, the sleep state does not change unless the other determination threshold is exceeded. It is possible to suppress fluttering of changes in the sleep state.

  FIG. 9 is a diagram illustrating a sleep state determination example using a multi-stage determination threshold. Similar to FIGS. 3 and 4, the biological information signal SL_sig and the sleeping state of the sleeping person are shown, but two sleeping states of the sleeping person are shown, the upper row shows the case where only the determination threshold value TH3 is used, and the lower row shows the judgment threshold value TH3. , TH4 is used. As shown in FIG. 9, when the two determination thresholds are used (lower stage), the variation in the sleep state is suppressed more than the case of the constant determination threshold (upper stage). It is easier to follow.

  Moreover, you may make it change a determination threshold value with the value of the biometric information to acquire. The output of biometric information varies depending on the environment to be acquired and the individual differences to be targeted. That is, it is a case where it becomes impossible to acquire correctly by sleeping on a futon, or a case where body movement always occurs due to a poor sleeping phase. In such a case, although not shown in the figure, the threshold changing unit 4 adjusts the determination threshold when the determination is continuously made for a certain period of time based on the acquired biological information (for example, body movement is continuously detected for two hours or more). By following (for example, lowering by 10), it is possible to improve followability.

  In addition, for those having individual differences such as the sleeping phase of the sleeping person, biometric information, etc., the threshold value changing unit 4 captures the biometric information signal acquired in the storage unit (not shown), and the tendency of individual differences from the captured past signals And the determination threshold value may be changed / adjusted according to information on individual differences. In addition, the threshold value changing unit 4 obtains a difference from normal when external factors such as ambient temperature and solar radiation amount are different from normal, and changes / adjusts the determination threshold using information of the difference. Also good. When the indoor environment control system 1 controls a plurality of indoor environment control devices, the determination threshold value may be changed and adjusted based on the interlocking state of each device. For example, in the case where, in addition to the air conditioner 100, a heating / cooling device or an electric fan (not shown) is a control target, the determination threshold value is changed and adjusted in consideration of a temperature that varies depending on the operation of each device. By changing / adjusting the determination threshold in this way, it is possible to change the determination threshold according to each sleeper's state or change the determination threshold based on external factors.

  In addition, about the classification | category of sleep depth, although it was set as two patterns, shallow sleep and deep sleep, for the simplification of determination and control, it does not necessarily need to be this way. A plurality of determination thresholds may be held, and six patterns of awakening, REM, and depth 1 to 4 may be determined using each determination threshold. Although not shown, in this case, the sleep state determination unit 3 may hold a plurality of determination thresholds, and may determine a sleep depth of 1 if the determination threshold is greater than or equal to the determination threshold A.

  In addition, the method for changing the determination threshold and the method for setting two determination thresholds having multiple determination thresholds described above may be performed simultaneously. In this case, the multi-stage determination threshold values are held before and after the passage of time (or sleep cycle).

  FIG. 10 is a diagram illustrating an example of the determination threshold when each of the plurality of determination thresholds is changed. As in FIG. 9, the biological information signal SL_sig and the sleeping state of the sleeping person are shown, but two sleeping states of the sleeping person are shown, the upper part shows the case where only the determination threshold value TH1 is used, and the lower part shows the determination threshold values TH3 and TH4. The case where two are used is shown. As shown in FIG. 10, by simultaneously performing the two determination threshold setting methods, flapping near the determination threshold can be suppressed, and deep sleep in the second half of sleep can be detected correctly.

  In addition, although the determination threshold value is changed based on the elapsed time from the sleep start and the sleep cycle and the determination threshold value is changed in the first half and the second half of the sleeper, the change of the determination threshold value is not limited to two stages. . During sleep of the sleeping person, the determination threshold value may be changed in three steps and four steps from the start of sleep. In this case, the determination threshold value changing method at each stage can be performed in the same manner as the method described above. This further suppresses flapping around the determination threshold, and can also correctly detect deep sleep in the second half of sleep.

  As described above, in the present embodiment, in the indoor environment control system 1, the sleep state determination unit 3 determines the sleep depth in real time with respect to the biological information signal based on the biological information acquired by the biological information acquisition unit 2. Then, the equipment control unit 5 controls the indoor environment control equipment. At this time, the threshold value changing unit 4 dynamically changes the determination threshold value used for the sleep depth determination. This makes it possible to improve temperature follow-up for biological information that changes from moment to moment, create an indoor environment that better matches the body condition of the sleeping person, and comfort that matches the body condition during sleep. It becomes possible to provide a comfortable sleep environment.

Embodiment 2. FIG.
In the first embodiment, the case where the indoor environment control system 1 is built in the air conditioner 100 has been described. However, the air conditioning control system 1 may be provided outside the air conditioner 100. FIG. 11 is a diagram illustrating an indoor installation example of the indoor environment control system 1a. Unlike FIG. 1, the indoor environment control system 1a is installed outside the air conditioner 100a which is an indoor environment control device. In this case, as shown in FIG. 12, the air conditioner 100a includes a control signal receiving unit 101 that receives an indoor environment control device control signal transmitted from the indoor environment control system 1a, and an indoor environment control device control that controls itself. Part 102. FIG. 12 is a diagram illustrating a configuration example of the indoor environment control system 1a and the air conditioner 100a. In the indoor environment control system 1a, the device control unit 5a transmits an indoor environment control device control signal to the control signal receiving unit 101 of the air conditioner 100a. Here, the device control unit 5a does not control each device to reach the set target value, but controls itself to reach the target value set by the indoor environment control device control unit 102. Since other configurations are the same, detailed description thereof is omitted. Note that the connection between the device control unit 5a of the indoor environment control system 1a and the control signal receiving unit 101 of the air conditioner 100a may be wired or wireless.

  In this case, the biological information acquisition unit 2 does not necessarily need to be non-contact, and is laid under a sensor (for example, a pulse meter or an electroencephalograph) that acquires the biological information by directly contacting the sleeping person or bedding. In addition, it may be a sensor (for example, a piezoelectric sensor) that acquires biological information by a pressure change during body movement.

  Thus, even when the indoor environment control system 1a is outside the air conditioner 100a, which is an indoor environment control device, the same effect as in the first embodiment can be obtained.

  In addition, although the case where the air conditioner is controlled as the indoor environment control device based on the sleep stage transition of the sleeper has been described, the present invention is not limited to this. It is also possible to control the indoor temperature by applying the control described above to a cooling / heating device such as a fan, a stove, or a heater. Moreover, as shown in FIGS. 11 and 12, an indoor environment air conditioning control system may be installed outside, and a room temperature or the like may be controlled by combining a plurality of devices.

  In addition, the case where the temperature and humidity in the room are controlled based on the transition of the sleep stage of the sleeper has been described, but the present invention is not limited to this, and other indoor conditions other than the temperature and the like are controlled based on similar control. It is also possible to control. For example, by applying the control described above to audio equipment, video equipment, lighting equipment, heating / cooling equipment, dehumidifying / humidifying equipment, scent-generating equipment, etc., the indoor environment is changed based on the sleep stage transition of the sleeper. You may control.

DESCRIPTION OF SYMBOLS 1, 1a Indoor environment control system 2 Biometric information acquisition part 3 Sleep state determination part 4 Threshold change part 41 Threshold change timer 42 Sleep cycle count part 5, 5a Equipment control part 100, 100a Air conditioner (indoor environment control equipment)
101 Control signal receiver 102 Control unit for indoor environment control equipment

Claims (8)

An indoor environment control system for controlling indoor environment control equipment,
Biological information acquisition means for periodically acquiring biological information of a sleeping person who is a sleeping person and outputting a biological information signal based on the acquired biological information;
A sleep state determination means for determining a sleep depth based on a result of comparing a current value of the biological information signal and a determination threshold value held by itself;
Threshold change means capable of changing the determination threshold;
Device control means for controlling the indoor environment control device based on the sleep depth;
Equipped with a,
The threshold value changing means further changes the determination threshold value using information on the difference when the indoor environment is different from normal.
An indoor environment control system characterized by that. The threshold value changing means changes the determination threshold value based on an elapsed time since the sleeper fell asleep.
The indoor environment control system according to claim 1. The threshold value changing means changes the determination threshold value based on a sleep cycle estimated from a change in sleep depth of a sleeper.
The indoor environment control system according to claim 1. The sleep state determination means holds a plurality of determination thresholds,
The threshold value changing means can change the plurality of determination threshold values, respectively.
The indoor environment control system according to claim 1, 2, or 3. The threshold value changing means further changes the determination threshold value using information on individual differences in biometric information generated by a sleeping person,
The indoor environment control system according to any one of claims 1 to 4. The threshold value changing means further changes the determination threshold value based on the interlocking state of each device when there are a plurality of control target devices.
The indoor environment control system according to any one of claims 1 to 5 . The indoor environment control device is an air conditioner that adjusts indoor temperature and humidity.
The indoor environment control system according to any one of claims 1 to 6 . The indoor environment control device is at least one of an audio device, a video device, a lighting device, a heating / cooling device, a dehumidifying / humidifying device, and a device for generating a scent,
The indoor environment control system according to any one of claims 1 to 6 .

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