JP2020169773A - Ventilation system - Google Patents

Abstract

To provide a ventilation system advantageous for obtaining good-quality sleep.SOLUTION: A ventilation system 1 comprises: a ventilation device 2 as ventilation means capable of taking outside air into a room; and control means having, as an operation mode of the ventilation device 2, a sleeping mode used when the user goes to bed indoors in a case where an outside air temperature is higher than a room temperature that is an indoor air temperature. In the sleeping mode, when a time elapsed from the time of bedtime or falling asleep of the user reaches a reference time, the ventilation device 2 performs ventilation operation.SELECTED DRAWING: Figure 1

Description

The present invention relates to a ventilation system.

According to Patent Document 1 below, when the outside air temperature drops below a predetermined set value after starting the cooling operation in the sleep mode, the cooling is stopped and the window is opened by the window opening / closing device to take in the outside air in the morning. The technology is disclosed.

JP-A-4-240344

The outside air temperature at night in summer does not always fall below the above set value. The technique of Patent Document 1 has a problem that ventilation is not executed during sleep because the window opening / closing device does not operate when the outside air temperature at night does not drop below the above set value.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a ventilation system that is advantageous for obtaining good quality sleep.

The ventilation system according to the present invention is used as a ventilation means capable of taking in outside air into the room and as an operation mode of the ventilation means when the user goes to bed indoors when the outside air temperature is higher than the room temperature which is the room temperature. It is provided with a control means having a sleeping mode, and in the sleeping mode, when the time elapsed from the time of bedtime or the time of falling asleep of the user reaches the reference time, the ventilation operation is performed by the ventilation means.
Further, the ventilation system according to the present invention is a ventilation means capable of taking in outside air into the room, and as an operation mode of the ventilation means, when the user goes to bed indoors when the outside air temperature is higher than the room temperature which is the room temperature. The control means includes a control means having a sleeping mode used in the above, and the control means can acquire information on the carbon dioxide concentration from the carbon dioxide concentration detecting means for detecting the carbon dioxide concentration in the room, and the carbon dioxide concentration in the sleeping mode. When the concentration threshold is reached, the ventilation operation is performed by the ventilation means.
Further, the ventilation system according to the present invention has a ventilation means capable of taking in outside air into the room and an operation mode of the ventilation means when the user goes to bed indoors when the outside air temperature is higher than the room temperature which is the room temperature. The control means includes a control means having a sleeping mode used in the above, and the control means can acquire the sleeping state information from the sleeping state detecting means for detecting the sleeping state information which is the information about the sleeping state of the user, and the sleeping mode. In the above, the ventilation operation is performed by the ventilation means according to the sleep state information.

According to the present invention, it is possible to provide a ventilation system that is advantageous for obtaining good quality sleep.

FIG. 5 is a cross-sectional side view showing a room provided with a ventilation system according to the first embodiment. It is a functional block diagram of the ventilation system according to Embodiment 1. It is a figure which shows an example of the change from the start of sleep to the wake up of a person. It is a flowchart which shows the operation example at the time of the sleeping mode of the ventilation system by Embodiment 1. It is a graph which shows the example of the time-dependent change of room temperature and carbon dioxide concentration when the sleeping mode by the flowchart shown in FIG.

Hereinafter, embodiments will be described with reference to the drawings. Common or corresponding elements in the drawings are designated by the same reference numerals to simplify or omit duplicate description.

Embodiment 1.
FIG. 1 is a cross-sectional side view showing a room provided with the ventilation system 1 according to the first embodiment. As shown in FIG. 1, the ventilation system 1 includes a ventilation device 2 capable of taking in outside air, which is outdoor air, into the room 90. The room 90 is a living space for people. The ventilation device 2 includes an air supply fan 3, an exhaust fan 4, and a heat exchange element 5. An exhaust port 6 and an air supply port 7 are provided on the ceiling of the room 90. The outer wall of the building having the interior 90 is provided with a suction port 8 and an outlet 9 as openings. The air supply duct 10 communicates between the suction port 8 and the air supply port 7. When the air supply fan 3 operates, the outside air sucked from the suction port 8 passes through the air supply fan 3 and the heat exchange element 5 and then flows into the room 90 from the air supply port 7. The exhaust duct 11 communicates between the exhaust port 6 and the outlet 9. When the exhaust fan 4 operates, the indoor air sucked from the exhaust port 6 passes through the exhaust fan 4 and the heat exchange element 5, and then flows out from the outlet 9 to the outside. The heat exchange element 5 exchanges heat between the air supply flow through the air supply duct 10 and the exhaust flow through the exhaust duct 11.

The ventilation device 2 in the present embodiment is an example of ventilation means. The ventilator 2 corresponds to a first-class ventilator that uses a fan for both air supply and exhaust. The ventilation means in the present disclosure is not limited to the first-class ventilation device, and may be, for example, a second-class ventilation device that uses a fan for air supply and does not use a fan for exhaust, or uses a fan for exhaust. , A type 3 ventilation system that does not use a fan may be used for the air supply. In the case of the third-class ventilation device, outside air can flow into the room 90 through a gap in the room structure or the like.

Hereinafter, the air temperature of the room 90 is referred to as "room temperature". The ventilation device 2 in the present embodiment includes a room temperature sensor 12 for detecting the room temperature and a carbon dioxide concentration sensor 13 for detecting the carbon dioxide concentration in the air in the room 90. In the illustrated example, the room temperature sensor 12 and the carbon dioxide concentration sensor 13 are arranged near the exhaust port 6. The room temperature sensor 12 is an example of a room temperature detecting means. In the following description, the carbon dioxide concentration in the air of the room 90 is simply referred to as "carbon dioxide concentration". The carbon dioxide concentration sensor 13 is an example of the carbon dioxide concentration detecting means.

The user 91 can enter the bed 92 in the room 90 and go to bed. In the illustrated example, the bed 92 is a bed. Not limited to the illustrated example, the bed 92 may be a futon laid on the floor of the room 90. In the illustrated example, the user 91 wears the bedding 93 and sleeps on the bed 92. The bedding 93 is, for example, a comforter, a towelette, a blanket, or the like. A smartphone 94 used by the user 91 is placed at the bedside of the bed 92. The smartphone 94 is an example of a mobile communication terminal.

The air conditioner 14 can perform an air conditioning operation for air conditioning in the room 90. The air conditioner 14 includes an indoor unit and an outdoor unit (not shown) connected to the indoor unit via a refrigerant pipe. The air conditioner 14 can perform at least a cooling operation as an air conditioning operation. The air conditioner 14 may be capable of further performing an air conditioning operation other than the cooling operation, such as a heating operation and a dehumidifying operation. In the illustrated example, the indoor unit of the air conditioner 14 is arranged near the ceiling of the room 90. The indoor unit of the air conditioner 14 includes a louver 15 that controls the direction of the airflow blown into the room 90.

Further, the air conditioner 14 in the present embodiment includes a surface temperature sensor 16. The surface temperature sensor 16 has, for example, an infrared sensor array (not shown) in which a plurality of infrared sensors are arranged in a row, and an actuator (not shown) that scans the room 90 by moving the infrared sensor array. According to the surface temperature sensor 16, the surface temperature of the human body and the object in the room 90 can be detected and the temperature distribution thereof can be mapped. For example, the surface temperature sensor 16 can detect the surface temperature of the human body of the user 91, the surface temperature of the bedding 93, the surface temperature of the floor of the room 90, the surface temperature of the wall of the room 90, and the like. The surface temperature sensor 16 periodically executes an operation of detecting the surface temperature and acquires the temperature distribution data of the room 90. By using the surface temperature sensor 16, it is possible to determine the presence or absence of a person in the room 90. When a person is present in the room 90, the surface temperature sensor 16 can be used to identify the position of the person and detect the surface temperature of the person.

FIG. 2 is a functional block diagram of the ventilation system 1 according to the first embodiment. As shown in FIG. 2, the ventilation device 2 further includes a ventilation control unit 17 corresponding to the control means and a communication unit 18 corresponding to the communication means. The ventilation control unit 17 controls the ventilation operation of the ventilation device 2. The ventilation control unit 17 has a timer function for managing the date and time. The communication unit 18 is, for example, a transmission / reception device for wireless communication.

The air conditioner 14 further includes a temperature / humidity sensor 19, an air conditioning control unit 20 corresponding to the control means, and a communication unit 21 corresponding to the communication means. The temperature / humidity sensor 19 periodically detects the room temperature and the humidity in the room 90. The air conditioning control unit 20 controls the air conditioning operation of the air conditioning device 14. The air conditioning control unit 20 has a timer function for managing the date and time. The communication unit 21 is, for example, a transmission / reception device for wireless communication. Regarding the air conditioner 14, the configurations of the refrigeration cycle, the blower fan, and the like necessary for realizing the air conditioning operation are known, and thus the illustration is omitted in the present disclosure.

Data can be transmitted and received in both directions between the communication unit 18 of the ventilation device 2 and the communication unit 21 of the air conditioner 14. For example, the information detected by using the surface temperature sensor 16 may be transmitted from the communication unit 21 to the communication unit 18. Further, in the present embodiment, data can be transmitted / received bidirectionally between at least one of the communication unit 18 of the ventilation device 2 and the communication unit 21 of the air conditioner 14 and the smartphone 94. The communication between the communication unit 18, the communication unit 21, and the smartphone 94 may be, for example, infrared communication or direct communication using short-range wireless communication such as Bluetooth (Bluetooth is a registered trademark). However, communication may be performed via a wireless LAN network such as Wi-Fi (Wi-Fi is a registered trademark). Further, the communication unit 18, the communication unit 21, and the smartphone 94 may communicate with each other via a home energy management system (HEMS) (not shown).

In the present embodiment, the ventilation control unit 17 can acquire information on the room temperature by the room temperature sensor 12. Not limited to such a configuration, the ventilation control unit 17 may acquire information on the room temperature detected by the room temperature detecting means provided in the device other than the ventilation device 2 by communication with the device. In that case, the ventilation device 2 does not have to include the room temperature sensor 12.

In the present embodiment, the ventilation control unit 17 can acquire information on the carbon dioxide concentration by the carbon dioxide concentration sensor 13. Not limited to such a configuration, the ventilation control unit 17 may acquire information on the carbon dioxide concentration detected by the carbon dioxide concentration detecting means provided in the device other than the ventilation device 2 by communication with the device. Good. In that case, the ventilation device 2 does not have to include the carbon dioxide concentration sensor 13.

Note that FIG. 2 illustrates a configuration in which the ventilation device 2 and the air conditioning device 14 can cooperate with each other by communicating between the communication unit 18 and the communication unit 21, but the ventilation system 1 of the present disclosure does not necessarily provide ventilation. The device 2 and the air conditioner 14 do not have to cooperate with each other. Further, the ventilation device 2 and the air conditioning device 14 do not necessarily have to be configured to be communicable with the smartphone 94. In the above case, the ventilation device 2 may not include the communication unit 18, and the air conditioner 14 may not include the communication unit 21.

Here, human sleep will be described. FIG. 3 is a diagram showing an example of changes from when a person starts sleeping to when he / she wakes up. FIG. 3 shows the relationship between sleep depth, which indicates the depth of sleep, and body movement. The height of the vertical line indicating the body movement indicates the magnitude of the body movement. High vertical lines indicate large body movements.

As shown in FIG. 3, between the time when a person starts sleeping and the time when he / she wakes up, the sleep becomes deeper in the order of sleep depths 1, 2, 3, and 4, and then sleep depth 3, The sleep cycle of transitioning to 2, 1, REM sleep is usually repeated in a cycle of about 90 minutes. In addition, the sleep time from when a person starts sleeping to when he / she wakes up is the time zone of the first half of relatively deep sleep (hereinafter referred to as "first half of sleep") and the time zone of the latter half of relatively light sleep (hereinafter referred to as "first half of sleep"). , "Late sleep"). In the first half of sleep, because of deep sleep, it is relatively insensitive to external stimuli such as airflow and temperature and humidity. On the other hand, in the latter half of sleep, sleep becomes lighter, sleep depths 3 and 4 are less likely to occur, and it becomes easier to respond to external stimuli. The deeper you sleep, the less body movement you have.

In the following description, the information regarding the sleep state of the user 91 is referred to as "sleep state information". In the present embodiment, the surface temperature sensor 16 can be used to detect sleep state information. At least one of the ventilation control unit 17 and the air conditioning control unit 20 can detect sleep state information by using the information detected by the surface temperature sensor 16, for example, as follows. According to the temperature distribution data detected by the surface temperature sensor 16, the position of the user 91 can be specified, so that the body movement of the user 91 can be detected by comparing the temperature distribution data in the time series. As mentioned above, the body movements of User 91 are associated with sleep. Therefore, by detecting the body movement of the user 91, for example, the sleep depth, the sleep cycle, and the like can be detected as sleep state information. Further, for example, the following may be performed. The time when the surface temperature sensor 16 detects the body movement of the user 91 is stored. Then, the total number of body movements that have occurred in the past fixed time is compared with the threshold value for determining the sleep depth, and the sleep depth is estimated from the comparison result. Further, the time width in which the body movement is detected, that is, the time from the detection of the body movement to the next detection of the body movement may be compared with the threshold value, and the depth of sleep may be estimated from the comparison result. .. Alternatively, the sleep state may be estimated by other methods. In the present embodiment, at least one of the ventilation control unit 17 and the air conditioning control unit 20 and the surface temperature sensor 16 correspond to, for example, sleep state detecting means for detecting sleep state information as described above.

The ventilation control unit 17 in the present embodiment has a "sleeping mode" as an operation mode of the ventilation device 2. The bedtime mode is used when the user 91 goes to bed in the room 90 when the outside air temperature is higher than the room temperature. For example, the bedtime mode is used when the outside air temperature is higher than the room temperature, as in the case of going to bed with the cooling operation of the air conditioner 14 in the summer. The ventilation control unit 17 is, for example, when the user 91 performs an operation to start the sleep mode on the operation unit (not shown), or when the start time reserved by the user 91 is reached, the sleep mode is set. Starts processing.

When going to bed with the cooling operation of the air conditioner 14 in the summer, there are generally the following problems. Since it is difficult to fall asleep when it is hot, the set temperature of the air conditioner 14 is often lowered at bedtime. Since the heat insulating property of a house has been improved in recent years, it is difficult for the room temperature to rise once the room temperature is lowered by the cooling operation. For this reason, it is easy to get cold because the low room temperature at bedtime continues during sleep. Further, when the cooling operation is used, the window is often closed and the room 90 is sealed, so that the carbon dioxide concentration gradually increases during sleep. Higher carbon dioxide levels worsen sleep quality.

According to the sleeping mode of the present embodiment, it is advantageous in solving the above-mentioned problems. In the bedtime mode, the ventilation control unit 17 performs a ventilation operation by the ventilation device 2 when the time elapsed from the time of bedtime or the time of falling asleep of the user 91 reaches the reference time. This ventilation operation may be referred to as "first ventilation operation" below. The following effects can be obtained by taking in outside air into the room 90 by the first ventilation operation during sleep. In the middle of sleep, the outside air having a temperature higher than the room temperature flows into the room 90, so that the room temperature can be raised. As a result, it is possible to reliably prevent chilling. Further, since the room temperature can be raised regardless of the air conditioner 14, power consumption can be suppressed. Further, the fresh outside air flowing into the room 90 can reduce the carbon dioxide concentration increased during sleep. As a result, it is advantageous in improving the quality of sleep.

The reference time may be, for example, a time corresponding to one cycle of the sleep cycle, a time longer than one cycle of the sleep cycle, a time corresponding to two or three cycles of the sleep cycle, or the like. Although there are individual differences in the sleep cycle, one cycle is generally about 90 minutes. Therefore, 90 minutes, 180 minutes, or 270 minutes may be used as the reference time.

The ventilation control unit 17 may consider the time when the bedtime mode is started as the time when the user 91 goes to bed or falls asleep. Alternatively, the timing at which the user 91 falls asleep may be detected by the sleep state detecting means.

In the bedtime mode, the ventilation control unit 17 may perform a ventilation operation by the ventilation device 2 when the carbon dioxide concentration acquired by the carbon dioxide concentration sensor 13 reaches a predetermined concentration threshold value. This ventilation operation may be referred to as "second ventilation operation" below. The following effects can be obtained by taking in the outside air into the room 90 by the second ventilation operation during sleep. It is possible to surely suppress an increase in carbon dioxide concentration during sleep beyond the concentration threshold value. As a result, it is advantageous in improving the quality of sleep. Further, during sleep, outside air having a temperature higher than room temperature flows into the room 90, so that the room temperature can be raised. As a result, it is possible to reliably prevent chilling. Further, since the room temperature can be raised regardless of the air conditioner 14, power consumption can be suppressed. The concentration threshold value may be, for example, 1000 ppm.

In the sleeping mode, the ventilation control unit 17 may perform a ventilation operation by the ventilation device 2 according to the sleep state information acquired by the sleep state detecting means. This ventilation operation may be referred to as a "third ventilation operation" below. The following effects can be obtained by taking in the outside air into the room 90 by the third ventilation operation during sleep. In the middle of sleep, the outside air having a temperature higher than the room temperature flows into the room 90, so that the room temperature can be raised. As a result, it is possible to reliably prevent chilling. Further, since the room temperature can be raised regardless of the air conditioner 14, power consumption can be suppressed. Further, the fresh outside air flowing into the room 90 can reduce the carbon dioxide concentration increased during sleep. As a result, it is advantageous in improving the quality of sleep. In particular, by using the sleep state information, ventilation can be performed at a more appropriate timing according to the sleep state of the user 91, which is more advantageous in improving the quality of sleep.

The ventilation system 1 according to the present disclosure may have a configuration capable of executing at least one of the first ventilation operation, the second ventilation operation, and the third ventilation operation in the sleeping mode. In the bedtime mode, the ventilation control unit 17 stops the ventilation device 2 until the ventilation operation is executed. As a result, it is possible to suppress the inflow of high-temperature outside air into the room 90, so that the cooling load of the air conditioner 14 can be reduced and the power consumption of the air conditioner 14 can be reduced.

In the bedtime mode, the ventilation control unit 17 temporarily performs the ventilation operation, and stops the ventilation device 2 after the ventilation operation is completed. As a result, it is possible to suppress the inflow of high-temperature outside air into the room 90, so that the cooling load of the air conditioner 14 can be reduced and the power consumption of the air conditioner 14 can be reduced.

Instead of the above configuration, the ventilation control unit 17 performs a weak operation in which the ventilation device 2 is operated with a ventilation volume lower than that of the ventilation operation at least one before the execution of the ventilation operation and after the end of the ventilation operation in the sleeping mode. You may go. In the weak operation, the amount of high-temperature outside air flowing into the room 90 is small, so that the cooling load of the air conditioner 14 can be reduced and the power consumption of the air conditioner 14 can be reduced.

In the sleeping mode, the ventilation control unit 17 may end the ventilation operation when the room temperature detected by the room temperature sensor 12 rises to the reference temperature during the ventilation operation. As a result, it is possible to more reliably prevent the room temperature from becoming too high or too low after the end of the ventilation operation, which is more advantageous in providing good quality sleep. The reference temperature may be, for example, a temperature determined according to the set temperature of the air conditioner 14, or a temperature obtained by adding a predetermined value to the room temperature before the execution of the ventilation operation.

During the ventilation operation in the sleeping mode, it is preferable that the air conditioning control unit 20 stops the air conditioning operation of the air conditioning device 14 or reduces the strength of the air conditioning operation. By doing so, the room temperature can be raised quickly and the power consumption of the air conditioner 14 can be reduced.

FIG. 4 is a flowchart showing an operation example of the ventilation system 1 according to the first embodiment in the sleeping mode. Hereinafter, an example of the operation of the ventilation system 1 will be further described with reference to FIG. When the user 91 goes to bed 92, the operation in the bed mode starts. For example, the user 91 may start the operation in the sleeping mode by remotely controlling the ventilation system 1 with the smartphone 94 or the remote control device (not shown) while in the bed 92.

When the bedtime mode is started, as step S1, the air conditioning control unit 20 executes the air conditioning operation of the air conditioning device 14, the room temperature sensor 12 detects the room temperature, and the carbon dioxide concentration sensor 13 detects the carbon dioxide concentration. In step S1, the air conditioning control unit 20 may execute the air conditioning operation so that the room temperature is slightly lower than the set temperature. By lowering the room temperature after going to bed, it is possible to more reliably prevent the user 91 from feeling the heat, so that the user 91 can fall asleep quickly and deeply.

From step S1 to step S2, the ventilation control unit 17 determines whether or not the carbon dioxide concentration detected in step S1 is equal to or higher than the concentration threshold value. If the carbon dioxide concentration is less than the concentration threshold value, the process returns to step S1. If the carbon dioxide concentration has reached the concentration threshold value, the process proceeds to step S3. In step S3, the ventilation control unit 17 executes the ventilation operation, and the air conditioning control unit 20 stops the air conditioning operation.

In step S3, as described above, the ventilation control unit 17 may end the ventilation operation when the room temperature detected by the room temperature sensor 12 rises to the reference temperature. Alternatively, the ventilation control unit 17 continues the ventilation operation until the carbon dioxide concentration detected by the carbon dioxide concentration sensor 13 drops to a second threshold value lower than the above concentration threshold value, and when the carbon dioxide concentration drops to the second threshold value. , The ventilation operation may be terminated. When the ventilation operation is completed, the air conditioning control unit 20 restarts the air conditioning operation. If the ventilation operation is continued until the carbon dioxide concentration drops to the second threshold value, the room temperature may become higher than the reference temperature. When the room temperature becomes higher than the reference temperature after the end of the ventilation operation, the air conditioning control unit 20 performs a cooling operation so that the room temperature drops to the reference temperature.

From step S3 to step S4, it is determined by the sleep state detecting means whether or not the sleep of the user 91 has shifted from the first half of sleep to the second half of sleep. In this step S4, for example, the following may be performed. The surface temperature sensor 16 detects the body movement of the user 91 and determines the sleep state. When the number of body movements within a certain period of time is smaller than a predetermined threshold value, or when the magnitude of body movements is smaller than a predetermined threshold value, it is determined that the sleep state of the user 91 is the first half of sleep. As shown in FIG. 3, the body movement repeatedly increases and disappears. The sleep state detecting means determines the progress of sleep of the user 91 based on the body movement detected by the surface temperature sensor 16. When the number of body movements within a certain period of time detected by the surface temperature sensor 16 becomes larger than the threshold value, or when the magnitude of body movement becomes larger than the threshold value, the sleep state detecting means is the user 91. It is judged that the light sleep time of the person has become longer, and it is judged that the sleep has shifted to the latter half of the sleep.

If it is determined in step S4 that the sleep of the user 91 is still in the first half of sleep and has not shifted to the second half of sleep, the process returns to step S1. On the other hand, if it is determined in step S4 that the sleeping state of the user 91 has shifted to the latter half of sleep, the process proceeds to step S5, and the air conditioning control unit 20 changes the set temperature of the air conditioning device 14. In this step S5, the set temperature is raised by a predetermined value (for example, 1 degree). By raising the set temperature a little, it is possible to more reliably prevent the body of the user 91, who has become lighter in sleep in the latter half of sleep, from getting cold. After that, in the latter half of sleep, the sleep becomes lighter toward waking up, and the person becomes sensitive to changes and the body temperature begins to rise. In accordance with such changes, it is advisable to gradually raise the room temperature to a temperature that is not too hot. In order to achieve this, the air conditioning control unit 20 may repeat the process of raising the set temperature several times before waking up.

As described above, in this flowchart, the timing for changing the set temperature of the air conditioner 14 is determined according to the sleeping state of the user 91. As a result, the set temperature can be changed at a more appropriate timing according to the sleeping state of the user 91. On the other hand, in the case of the configuration not provided with the sleep state detecting means, the set temperature of the air conditioner 14 may be changed, for example, after a certain period of time has elapsed from the time of bedtime.

From step S5 to step S6, the ventilation control unit 17 determines whether or not the current carbon dioxide concentration detected by the carbon dioxide concentration sensor 13 is equal to or higher than the concentration threshold value. If the carbon dioxide concentration is less than the concentration threshold, the process of step S6 is repeated. On the other hand, when the current carbon dioxide concentration has reached the concentration threshold value, the process proceeds to step S7. In step S7, the ventilation control unit 17 executes the ventilation operation.

The process proceeds from step S7 to step S8. In step S8, the ventilation control unit 17 or the air conditioning control unit 20 determines whether or not to end the operation in the sleeping mode. When the operation in the sleeping mode is ended, the process proceeds to step S9, and the operation of the ventilation device 2 and the air conditioning device 14 is stopped. In step S8, the end of the operation in the sleeping mode is determined, for example, as follows.
-When the user operates the remote controller device or the smartphone 94 to stop the operation of the ventilation system 1, it is determined that the operation in the sleeping mode is terminated.
-When a preset end time (for example, 8 hours) has elapsed from the start of the operation in the sleep mode, it is determined that the operation in the sleep mode is ended.
-When the preset wake-up time is reached, it is determined that the operation in the sleeping mode is terminated.
The position of the user 91 is detected by the surface temperature sensor 16, and it is determined whether or not the user 91 has woken up. If the user 91 wakes up, it is determined that the operation in the sleeping mode is terminated.

FIG. 5 is a graph showing an example of changes over time in room temperature and carbon dioxide concentration when the sleeping mode according to the flowchart shown in FIG. 4 is executed. The graph of "with ventilation operation" in FIG. 5 shows the transition of the carbon dioxide concentration when the sleeping mode is executed, and the graph of "without ventilation operation" (comparative example) shows the transition of the sleeping mode. It shows the transition of carbon dioxide concentration when there is no carbon dioxide concentration.

As shown in FIG. 5, in the case of "no ventilation operation", the carbon dioxide concentration during sleep increases as the carbon dioxide concentration continues to rise in the closed room 90, so that it is possible to obtain good quality sleep. Can not. On the other hand, in the present embodiment, the room temperature can be raised to an appropriate temperature during sleep while keeping the carbon dioxide concentration within the concentration threshold value (for example, 1000 ppm). As a result, it is possible to obtain good quality sleep.

Although the example of the process of the sleeping mode by the flowchart shown in FIG. 4 has been described above, in the present embodiment, the following may be further performed.

There is a possibility that a plurality of users 91 will go to bed in the room 90. The ventilation control unit 17 may acquire information on the number of users 91 from the number detection means that detects the number of users 91. For example, according to the surface temperature sensor 16, the number of users 91 can be detected. Then, the ventilation control unit 17 may change the concentration threshold value of the carbon dioxide concentration that performs the ventilation operation according to the number of users 91. For example, as the number of users 91 increases, the concentration threshold value may be increased. By doing so, the frequency of the ventilation operation can be adjusted more appropriately according to the number of users 91.

In the bedtime mode, the ventilation control unit 17 may perform a ventilation operation when the sleep state detecting means detects that the sleep of the user 91 has shifted from the first half of sleep to the second half of sleep. As a result, when shifting to the latter half of light sleep, the room temperature can be raised and the carbon dioxide concentration can be lowered, which is more advantageous for obtaining good quality sleep.

The sleep state detecting means may detect information regarding at least one of the warm / cold feeling of the user 91 and the state of the bedding 93 of the user 91 as sleep state information. According to the surface temperature sensor 16, the warm / cold feeling of the user 91 can be determined as follows, for example. From the temperature distribution detected by the surface temperature sensor 16, the surface temperature of the skin of the user 91 such as the face, hands, and feet is specified, and when the surface temperature of the skin is high, it is determined that the user 91 feels warm. However, when the surface temperature of the skin is low, it can be determined that the user 91 feels cold. Further, according to the surface temperature sensor 16, the state of the bedding 93 of the user 91 can be determined as follows, for example. The surface temperature of the bedding 93 is lower than the surface temperature of the skin of the user 91. Further, the surface temperature of the bedding 93 is lower than the surface temperature of the nightwear in contact with the skin of the user 91. By utilizing this, it is possible to determine how much the user 91 is wearing the bedding 93 on the body from the temperature distribution detected by the surface temperature sensor 16. The ventilation control unit 17 may execute the ventilation operation according to the information regarding at least one of the warm / cold feeling of the user 91 and the state of the bedding 93 of the user 91 detected by the sleep state detecting means. For example, the ventilation control unit 17 may execute a ventilation operation when a feeling of warmth or coldness that the user 91 feels cold is detected. As a result, the room temperature rises, so that the coldness of the user 91 can be eliminated. In addition, the ventilation control unit 17 may execute a ventilation operation when it is detected that the user 91 covers the bedding 93 on most of the body. When the user 91 wears the bedding 93 on most of the body, it can be determined that the user 91 feels cold. By executing the ventilation operation in this case, the room temperature rises, so that the coldness of the user 91 can be eliminated.

In the present embodiment, the surface temperature sensor 16 of the sleep state detecting means is provided in the air conditioner 14, which is advantageous in simplifying the configuration of the ventilation device 2.

In the present embodiment, the surface temperature sensor 16 is exemplified as the sensor of the sleep state detecting means, but the present invention is not limited thereto. For example, the sensor of the sleep state detecting means may use at least one of a radio wave sensor such as a Doppler sensor, a camera, an infrared camera, a thermography, and an ultrasonic radar. Further, the sleep state detecting means may be configured to detect at least one of the heartbeat, pulsation, pulsation, and respiration of the user 91 and determine the sleep state based on the detection result. Further, the sensor of the sleep state detecting means may be provided at a place other than the air conditioner 14. For example, the sensor of the sleep state detecting means may be provided in the ventilation device 2. Further, an acceleration sensor or the like provided in the smartphone 94 placed at the bedside of the user 91 may be used as a sensor of the sleep state detecting means.

The ventilation control unit 17 or the air conditioning control unit 20 may use the room temperature, carbon dioxide concentration, sleep state of the user 91, execution history of ventilation operation, set temperature of the air conditioner 14, and air conditioning when the sleeping mode is being executed. Information regarding at least one of the air volumes of the device 14 (hereinafter, referred to as “sleeping information”) may be transmitted to the smartphone 94 via the communication unit 18 or the communication unit 21. As a result, the user 91 can confirm the sleeping information by looking at the smartphone 94 after waking up.

The ventilation system 1 has a user interface and a communication unit 18 or a communication unit that allows the user 91 to input information regarding the impression of the user 91 when going to bed while the sleep mode is being executed (hereinafter, referred to as “sleep impression information”). It may be configured to communicate via 21 and control the sleeping mode at a later date according to the sleeping impression information acquired from the user interface. For example, the smartphone 94 may be used as the user interface. The bedtime impression information includes, for example, good sleep, poor sleep, hot sleep time, cold sleep time, hot pre-wake-up time, and cold pre-wake-up time. , Etc. At least one of the ventilation control unit 17 and the air conditioning control unit 20 can learn the preference of the user 91 by learning the daily sleeping information and the sleeping impression information in association with each other. At least one of the ventilation control unit 17 and the air conditioning control unit 20 controls the parameters of the sleeping information in the sleeping mode at a later date according to the learned preference of the user 91, so that the individual user 91 can be treated. It is possible to provide control of the sleeping mode that suits at a higher level.

The ventilation system 1 acquires the information of the outside air temperature from the outside air temperature detecting means (not shown) for detecting the outside air temperature, and permits the execution of the sleeping mode when it is confirmed that the outside air temperature is higher than the room temperature. It may be configured in.

In the present embodiment, the ventilation device 2 provided with a fan is illustrated as the ventilation means, but the ventilation means in the present disclosure is not limited to the one provided with a fan. For example, the ventilation means may be configured to take in outside air into the room 90 by opening the window by a window opening / closing device (not shown) that automatically opens and closes the window facing the outside.

At least one control unit of the ventilation control unit 17 and the air conditioning control unit 20 may be configured as follows. Each function of the control unit may be realized by a processing circuit. The processing circuit of the control unit may include at least one processor and at least one memory. When the processing circuit includes at least one processor and at least one memory, each function of the control unit may be realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware may be written as a program. At least one of the software and firmware may be stored in at least one memory. At least one processor may realize each function of the control unit by reading and executing a program stored in at least one memory. At least one memory may include a non-volatile or volatile semiconductor memory, a magnetic disk, and the like.

The processing circuit of the control unit may include at least one dedicated hardware. When the processing circuit comprises at least one dedicated hardware, the processing circuit may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-). The Programmable Gate Array), or a combination thereof may be used. The functions of each part of the control unit may be realized by the processing circuit. Further, the functions of each part of the control unit may be collectively realized by the processing circuit. For each function of the control unit, a part may be realized by dedicated hardware and another part may be realized by software or firmware. The processing circuit may realize each function of the control unit by hardware, software, firmware, or a combination thereof.

1 Ventilation system, 2 Ventilation system, 3 Air supply fan, 4 Exhaust fan, 5 Heat exchange element, 6 Exhaust port, 7 Air supply port, 8 Suction port, 9 Outlet port, 10 Air supply duct, 11 Exhaust duct, 12 Room temperature Sensor, 13 Carbon dioxide concentration sensor, 14 Air conditioner, 15 Louver, 16 Surface temperature sensor, 17 Ventilation control unit, 18 Communication unit, 19 Temperature and humidity sensor, 20 Air conditioner control unit, 21 Communication unit, 90 Indoor, 91 User, 92 Bed, 93 Bedding, 94 Smartphone

Claims (11)

Ventilation means that can take in outside air into the room,
As the operation mode of the ventilation means, a control means having a sleeping mode used when the user goes to bed in the room when the outside air temperature is higher than the room temperature which is the room temperature.
With
A ventilation system that performs a ventilation operation by the ventilation means when the time elapsed from the time of bedtime or the time of falling asleep of the user reaches the reference time in the sleeping mode. Ventilation means that can take in outside air into the room,
As the operation mode of the ventilation means, a control means having a sleeping mode used when the user goes to bed in the room when the outside air temperature is higher than the room temperature which is the room temperature.
With
The control means can acquire information on the carbon dioxide concentration from the carbon dioxide concentration detecting means for detecting the carbon dioxide concentration in the room.
A ventilation system that performs a ventilation operation by the ventilation means when the carbon dioxide concentration reaches a concentration threshold value in the bedtime mode. The control means can acquire information on the number of people from the number detection means that detects the number of users.
The ventilation system according to claim 2, wherein the concentration threshold value is changed according to the number of people. Ventilation means that can take in outside air into the room,
As the operation mode of the ventilation means, a control means having a sleeping mode used when the user goes to bed in the room when the outside air temperature is higher than the room temperature which is the room temperature.
With
The control means can acquire the sleep state information from the sleep state detection means that detects the sleep state information which is the information about the sleep state of the user.
A ventilation system that performs a ventilation operation by the ventilation means according to the sleep state information in the sleep mode. The ventilation system according to claim 4, wherein in the sleeping mode, when the sleep of the user shifts from the first half of sleep to the second half of sleep, which is lighter than the first half of sleep, the ventilation operation is performed. The sleep state information includes information on at least one of the warm / cold feeling of the user and the state of the bedding of the user.
The ventilation system according to claim 4 or 5, wherein in the sleeping mode, the ventilation operation is performed according to information regarding at least one of the hot and cold feeling and the state of the bedding. The control means can acquire information on the room temperature from the room temperature detecting means for detecting the room temperature.
The ventilation system according to any one of claims 1 to 6, wherein when the room temperature rises to a reference temperature while the ventilation operation is being performed in the sleeping mode, the ventilation operation is terminated. Equipped with an air conditioner capable of performing air conditioning operation for air conditioning in the room
The ventilation system according to any one of claims 1 to 7, wherein the air conditioning operation is stopped or the strength of the air conditioning operation is reduced during the ventilation operation in the sleeping mode. Equipped with an air conditioner capable of performing air conditioning operation for air conditioning in the room
The ventilation system according to any one of claims 1 to 8, wherein the air conditioner includes a sleep state detecting means for detecting sleep state information which is information on the sleep state of the user. The room temperature, the carbon dioxide concentration in the room, the sleeping state of the user, the execution history of the ventilation operation, the set temperature of the air conditioner for air conditioning in the room, and the set temperature of the air conditioner in the room when the sleeping mode is executed. The ventilation system according to any one of claims 1 to 9, further comprising a communication means capable of transmitting information regarding at least one of the air volumes of the air conditioner to the mobile communication terminal used by the user. .. A communication means capable of communicating with a user interface capable of inputting bedtime impression information, which is information on impressions when going to bed during execution of the sleep mode, is provided.
The ventilation system according to any one of claims 1 to 10, which controls the sleeping mode at a later date according to the sleeping impression information acquired from the user interface.

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