JP7403669B2 - Ventilation alarm device and ventilation alarm program - Google Patents

Description

This technology relates to a ventilation notification device and a ventilation notification program. In particular, it relates to notification regarding natural ventilation of indoor spaces.

Traditionally, technology has been used to condition and ventilate indoor spaces that are subject to air conditioning, and by using multiple ventilation devices and an air conditioning ventilation system that partially conditions the air, it is possible to eliminate heat trapping and operate with energy savings. There is a system (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2015-040655

In the system of Patent Document 1 mentioned above, an air conditioner and a ventilation device work together to perform ventilation. The ventilation system then adjusts the amount of ventilation based on the temperature data acquired by the air conditioner, thereby solving problems such as heat trapping in the indoor space.

Here, as a measure against infectious diseases, there are increasing opportunities for users in indoor spaces to open windows to provide natural ventilation. At this time, if a window or the like is opened when there is a large temperature difference between indoors and outdoors, such as when an air conditioner is operating, the heat load in the indoor space increases and the indoor environment changes. Therefore, in order to suppress the increase in heat load and perform natural ventilation efficiently, the timing of ventilation is important, but it is difficult for users to grasp the timing of ventilation.

Therefore, it is an object of the present invention to solve the above-mentioned problems and to obtain a ventilation notification device and a ventilation notification program that provide notification that allows efficient natural ventilation of an indoor space.

The ventilation alarm device according to this disclosure is a ventilation alarm device that provides notification regarding ventilation of an indoor space in a building, and includes a surface temperature detection section that detects the temperature of the surface of a building frame in the indoor space as the structure temperature, and a notification signal that is transmitted. An alarm unit that notifies you when the change in room temperature in the indoor space is predicted from the body temperature, and based on the prediction, the heat load in the indoor space is set to increase from an intermediate trend within a predetermined range of change. Alternatively, if it is determined that there is a decreasing trend , the control unit sends a notification signal to the notification unit to prompt the start of natural ventilation.

Further, the ventilation notification program according to this disclosure is a program that notifies ventilation of an indoor space in a building, and includes a step of predicting the amount of change in room temperature from a frame temperature, which is the temperature of the surface of the frame in the indoor space, and a step of predicting the amount of change in room temperature. A process of determining whether the trend of the heat load in the indoor space changes from an intermediate trend within a predetermined set change amount range to an increasing or decreasing trend based on If it is determined that there is , the computer sends a notification signal to prompt the start of natural ventilation and causes the notification section to notify the user.

According to this disclosure, the control unit predicts the amount of change in room temperature from data on the body temperature detected by the surface temperature detection unit, and determines that the predicted heat load in the indoor space is in an increasing or decreasing trend from an intermediate trend. When the determination is made , a notification signal is sent to the notification unit to notify the start of ventilation. Therefore, notification to encourage natural ventilation can be made at a timing when there is little change in the heat load in the indoor space. When the indoor space is being air-conditioned, the air in the indoor space can be exchanged while saving energy.

1 is a diagram showing the configuration of an air conditioner 1 according to Embodiment 1. FIG. FIG. 3 is a diagram showing the configuration of an outdoor unit control section 51 included in the air conditioner 1 according to the first embodiment. 3 is a diagram showing a functional configuration of an outdoor unit control section 51 in the air conditioner 1 according to the first embodiment. FIG. 3 is a diagram showing the state of heat transfer in the house 3. FIG. It is a figure showing an example of the relationship between body temperature and room temperature. FIG. 3 is a diagram showing an example of the relationship between body temperature and room temperature during heating operation. FIG. 3 is a diagram showing an example of the relationship between the body temperature and room temperature during cooling operation. FIG. 3 is a diagram showing a flow of air conditioning control processing performed by the air conditioner 1 according to the first embodiment. FIG. 7 is a diagram showing the flow of processing related to ventilation notification in Embodiment 3. FIG. 7 is a diagram illustrating a change in the tendency of heat load in Embodiment 3. FIG. 5 is a diagram illustrating an example of notification by a notification unit 58. FIG. FIG. 9 is a diagram showing a flow of processing related to notification of ventilation according to Embodiment 4; FIG. 12 is a diagram showing the flow of processing related to notification of ventilation according to Embodiment 8. It is a figure showing air conditioning system 500 concerning Embodiment 9.

Hereinafter, embodiments will be described in detail using the drawings. Here, in the following drawings, the size relationship of each component may differ from the actual one. In addition, in the following drawings, the same or corresponding parts are denoted by the same reference numerals.

Further, the forms of the constituent elements shown in the specification are merely examples, and the present invention is not limited to these descriptions. Furthermore, the present invention is not limited to the embodiments and drawings.

In the embodiment, the step of writing a program that performs an operation is a process that is performed chronologically according to the described order, but it does not necessarily have to be processed chronologically, but can be performed in parallel or separately. It may also include processing.

The embodiments may be implemented alone or in combination. In either case, the advantageous effects described below are produced. Furthermore, various specific settings described in each embodiment are merely examples, and therefore are not particularly limited to these.

In the embodiments, a system refers to an entire device made up of a plurality of devices or an entire function made up of a plurality of functions.

Embodiment 1.
<Configuration of air conditioner 1>
FIG. 1 is a diagram showing the configuration of an air conditioner 1 according to the first embodiment. The air conditioner 1 is a device that air-conditions an indoor space 71 in a house 3 to be air-conditioned. Here, the air conditioner 1 has various parts that serve as a ventilation alarm device. Air conditioning refers to adjusting the temperature, humidity, cleanliness, airflow, etc. of air in a space to be air conditioned, and specifically includes heating, cooling, dehumidification, humidification, or air cleaning.

As shown in FIG. 1, an air conditioner 1 is installed in a house 3, which is a building. The house 3 is, for example, a so-called general detached house building. The house 3 has an indoor space 71 surrounded by a frame such as walls and floors. Further, the house 3 has a window 4 that can be opened and closed (hereinafter referred to as opening and closing) at the boundary between the inside and outside of the indoor space 71. The air conditioner 1 is a heat pump type air conditioner that uses, for example, CO ₂ (carbon dioxide) or HFC (hydrofluorocarbon) as a refrigerant. The air conditioner 1 is equipped with a vapor compression type refrigeration cycle, and operates by obtaining electric power from a commercial power source, power generation equipment, power storage equipment, etc. (not shown).

As shown in FIG. 1, the air conditioner 1 includes an outdoor unit 11 installed outside the house 3, an indoor unit 13 installed indoors inside the house 3, and a remote controller 55 operated by a user. Be prepared. The outdoor unit 11 and the indoor unit 13 are connected via a refrigerant pipe 61 through which refrigerant flows and a communication line 63 through which various signals are transferred. The air conditioner 1 is a device that cools an indoor space 71 in the house 3 by blowing cold air from the indoor unit 13, and heats the indoor space 71 in the house 3 by blowing warm air.

The outdoor unit 11 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, an expansion valve 24, an outdoor blower 31, and an outdoor unit control section 51. On the other hand, the indoor unit 13 includes an indoor heat exchanger 25, an indoor blower 33, and an indoor unit control section 53. The refrigerant pipe 61 connects the compressor 21, four-way valve 22, outdoor heat exchanger 23, and expansion valve 24 of the outdoor unit 11 to the indoor heat exchanger 25 of the indoor unit 13 in an annular manner. This constitutes a refrigeration cycle circuit.

The compressor 21 compresses the refrigerant and circulates it through the refrigeration cycle. Specifically, the compressor 21 compresses the sucked low-temperature and low-pressure refrigerant, and discharges the high-pressure and high-temperature refrigerant to the four-way valve 22 . The compressor 21 of the first embodiment includes an inverter circuit that can change the operating capacity according to the drive frequency. The operating capacity is the amount of refrigerant that the compressor 21 pumps out per unit. The drive frequency of the compressor 21 is adjusted according to instructions from the outdoor unit control section 51, and the operating capacity is changed.

The four-way valve 22 is installed on the discharge side of the compressor 21. The four-way valve 22 switches the direction in which the refrigerant in the refrigerant pipe 61 flows depending on whether the air conditioner 1 is operating in cooling, dehumidifying, or heating mode.

The outdoor heat exchanger 23 is a first heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant pipe 61 and the air in the outdoor space 72 outside the space to be air conditioned. The outdoor blower 31 is provided near the outdoor heat exchanger 23 and is a first blower that sends air from the outdoor space 72 to the outdoor heat exchanger 23 . When the outdoor blower 31 starts blowing air, negative pressure is generated inside the outdoor unit 11 and sucks air from the outdoor space 72 . The sucked air is supplied to the outdoor heat exchanger 23 and is blown out into the outdoor space 72 after exchanging heat with cold and hot heat supplied by the refrigerant flowing through the refrigerant pipe 61 .

The expansion valve 24 is installed between the outdoor heat exchanger 23 and the indoor heat exchanger 25, and decompresses and expands the refrigerant flowing through the refrigerant pipe 61. The expansion valve 24 is an electronic expansion valve whose opening degree can be variably controlled. The expansion valve 24 adjusts the pressure of the refrigerant by changing its opening according to instructions from the outdoor unit control section 51.

The indoor heat exchanger 25 is a second heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant pipe 61 and the air in the indoor space 71. The indoor blower 33 is a second blower that is provided near the indoor heat exchanger 25 and sends air from the indoor space 71 to the indoor heat exchanger 25. When the indoor blower 33 starts blowing air, negative pressure is generated inside the indoor unit 13 and sucks air from the indoor space 71. The sucked air is supplied to the indoor heat exchanger 25 and is blown out into the indoor space 71 after exchanging heat with cold and warm heat supplied from the refrigerant flowing through the refrigerant pipe 61 .

The air heat-exchanged by the indoor heat exchanger 25 is supplied to the indoor space 71 as air-conditioned air. Thereby, the indoor space 71 is cooled and heated. The larger the amount of heat exchanged between the refrigerant and the air in the indoor heat exchanger 25, the higher the air conditioning capacity of the air conditioner 1 becomes. Here, the air conditioning capacity is an index indicating the strength of air conditioning by the air conditioner 1. Hereinafter, the air conditioning capacity during cooling will be referred to as cooling capacity, and the air conditioning capacity during heating will be referred to as heating capacity.

Here, the compressor 21, four-way valve 22, outdoor heat exchanger 23, expansion valve 24, and outdoor blower 31 in the outdoor unit 11, and the indoor heat exchanger 25 and indoor blower 33 in the indoor unit 13 are collectively referred to as the air conditioning section. call. The air conditioner actually conditions the air in the indoor space 71 in the air conditioner 1 .

The outdoor unit 11 has an outdoor temperature detection section 42 . The outdoor temperature detection unit 42 has a temperature sensor such as a resistance temperature detector, a thermistor, or a thermocouple, and detects the temperature of the air outside the indoor space 71 sucked in by the outdoor blower 31 (hereinafter referred to as outside temperature). It becomes the temperature detection part.

In addition, the indoor unit 13 includes devices related to a room temperature detection section 41, a surface temperature detection section 43, a window opening/closing detection section 45, a solar radiation amount detection section 47, a human body detection section 49, a notification section 58, and a wireless communication section 59. The room temperature detection unit 41 includes a temperature sensor such as a resistance temperature detector, a thermistor, or a thermocouple, and detects the temperature of the indoor space 71 in the house 3 (hereinafter referred to as room temperature). The room temperature detection unit 41 is installed at the suction port of the indoor heat exchanger 25, and detects the temperature of the air sucked into the indoor unit 13 as room temperature.

The surface temperature detection unit 43 has an infrared sensor such as a pyroelectric type or a thermopile type, and detects the surface temperature of the detected object by detecting infrared rays emitted from the detected object. The surface temperature detection unit 43 of the first embodiment is installed at a position where it can detect infrared rays emitted from the walls, floors, etc. of the indoor space 71, and detects the surface temperature of surrounding objects including the walls, floors, etc. do. In the first embodiment, the surface temperature detected by the surface temperature detection unit 43 is the body temperature of the surface of the body in the indoor space 71 that surrounds the indoor space 71 and partitions the inside and outside of the indoor space 71.

The window opening/closing detection section 45 detects whether the window 4 is opened or closed. Detection of opening/closing of the window 4 is not particularly limited. The window opening/closing detection unit 45 has, for example, an infrared sensor such as a pyroelectric type or a thermopile type, and determines the area of the window 4 in the indoor space 71 based on the difference in temperature with the wall of the house 3 or the like. Then, the amount of change in temperature in the area of the window 4 is detected, and when the outside temperature, which is the temperature outside the indoor space 71, is high, the difference from the previous image, the outside temperature, the current room temperature, and the current surface temperature of the window 4 are detected. It is determined that the window 4 is open when the amount of change is greater than the threshold value calculated from the threshold value. Similarly, when the outside temperature is low, it is determined that the window 4 is open when the amount of change is greater than a threshold value determined from the difference from the previous image, the outside temperature, the current room temperature, and the current surface temperature of the window 4. do. Further, the temperature before the window 4 is opened is stored, and when the temperature returns to a threshold value or less, it is detected that the window 4 is closed.

Further, the window opening/closing detection section 45 may use a VOC gas sensor such as _CO2 . When the air conditioner 1 is operating, the windows 4 and the like are basically closed. Therefore, it is possible to detect that the window 4 has been opened when the VOC gas sensor has changed to a value equal to or higher than the threshold value, which is equal to or higher than the human body entering and exiting the room.

The solar radiation amount detection unit 47 has an infrared sensor such as a pyroelectric type or a thermopile type infrared sensor, and detects the amount of solar radiation that enters the indoor space 71 through the window 4 or the like. Here, the indoor unit 13 will be described as having the solar radiation amount detection section 47. However, for example, by installing the solar radiation detection unit 47 in a location where the solar radiation can be detected, such as near the window 4 or the outdoor space 72, it is possible to detect the solar radiation on the wall of the house 3, etc. It is possible to accurately detect the amount of solar radiation.

The human body detection unit 49 has an infrared sensor such as a pyroelectric type or a thermopile type, and detects whether there is a person in the indoor space 71.

The notification unit 58 has a device that performs notification, and, as described later, provides notification to people in the indoor space 71 based on a notification signal sent from the control unit 101 or the like. The device that makes the notification is, for example, a sound generator such as a buzzer or a light emitting device such as an LED lamp. Further, the notification unit 58 can be not only a device included in the indoor unit 13 but also a display device included in a remote controller 55, which will be described later. However, it is not limited to these devices.

The wireless communication unit 59 includes wireless communication equipment. The wireless communication unit 59 performs wireless communication using, for example, Wi-Fi (registered trademark), sends signals to external devices (not shown) outside the air conditioner 1, and performs various notifications. be able to. The external device is, for example, a smartphone, a smart speaker, or the like.

Here, the air conditioner 1 includes detection units other than the room temperature detection unit 41, the surface temperature detection unit 43, the window opening/closing detection unit 45, the solar radiation amount detection unit 47, and the human body detection unit 49 (not shown). For example, the air conditioner 1 includes a discharge side pressure detection section that is installed on the discharge side of the compressor 21 and detects the pressure of refrigerant discharged from the compressor 21. The air conditioner 1 also includes a suction side pressure detection section that is installed on the suction side of the compressor 21 and detects the pressure of the refrigerant sucked into the compressor 21. Furthermore, the air conditioner 1 includes a discharge side temperature detection section that is installed on the discharge side of the compressor 21 and detects the temperature of the refrigerant discharged from the compressor 21. The air conditioner 1 includes a suction side temperature detection section that is installed on the suction side of the compressor 21 and detects the temperature of the refrigerant sucked into the compressor 21.

Signals related to detection by various detection sections including the room temperature detection section 41, the surface temperature detection section 43, the window opening/closing detection section 45, the solar radiation amount detection section 47, and the human body detection section 49 are sent to the indoor unit control section 53. The indoor unit control section 53 sends a signal including data related to detection to the outdoor unit control section 51 via the communication line 63. Then, the indoor unit control unit 53 performs processing such as determination regarding natural ventilation etc. based on the data regarding the detection. The indoor unit control section 53 sends a notification signal based on the processing to the notification section 58 or the wireless communication section 59. The notification section 58 or the wireless communication section 59 performs notification based on the notification signal. Therefore, here, the air conditioner 1 not only performs air conditioning but also serves as a ventilation notification device. The outdoor unit control section 51 and the indoor unit control section 53 function as a control section of a ventilation notification device that performs processing related to notification of natural ventilation through cooperative operation.

FIG. 2 is a diagram showing the configuration of the outdoor unit control section 51 included in the air conditioner 1 according to the first embodiment. FIG. 2 shows the configuration of devices (hardware) in the outdoor unit control section 51. The outdoor unit control section 51 mainly controls the operation of the outdoor unit 11. The outdoor unit control section 51 here serves as a control section of the ventilation notification device, as described above. As shown in FIG. 2, the outdoor unit control section 51 includes a control section 101, a storage section 102, a clock section 103, and a communication section 104. Each part is connected via a bus 109.

The control unit 101 is a device including a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU is also referred to as a central processing unit, central processing unit, processor, microprocessor, microcomputer, DSP (Digital Signal Processor), or the like. In the control unit 101, the CPU reads programs and data stored in the ROM or the storage unit 102, and uses the RAM as a work area to centrally control the entire outdoor unit control unit 51.

The storage unit 102 is a device that plays a role as a so-called secondary storage device or auxiliary storage device. The storage unit 102 is a nonvolatile semiconductor memory such as a flash memory, an EPROM (Erasable Programmable ROM), or an EEPROM (Electrically Erasable Programmable ROM). The storage unit 102 stores programs and data used by the control unit 101 to perform various processes, as well as data generated or acquired by the control unit 101 performing various processes. For example, the storage unit 102 stores data detected by various detection units including the room temperature detection unit 41 and the surface temperature detection unit 43, data set by the user in the remote controller 55, preset data, and the like.

The clock unit 103 is a device that measures time. The clock section 103 includes an RTC (Real Time Clock) and can continue clocking even when the air conditioner 1 is powered off.

The communication unit 104 is a device that serves as an interface for communicating with the indoor unit control unit 53 and the remote controller 55 via the communication line 63. The communication unit 104 receives, for example, an operation instruction input from the user to the remote controller 55 and a signal including data related to detection by the various detection units by the indoor unit control unit 53, and sends the received signal to the control unit 101. Further, the communication unit 104 sends a signal related to an instruction to the indoor unit 13, a notification signal to notify the user, etc. through the processing of the control unit 101.

Next, the indoor unit control section 53 will be explained. The indoor unit control section 53, like the outdoor unit control section 51 shown in FIG. 2, includes a CPU, a ROM, a RAM, a communication interface, and a readable/writable nonvolatile semiconductor memory (not shown). In the indoor unit control section 53, the CPU controls the operation of the indoor unit 13 by executing a control program stored in the ROM while using the RAM as a work memory. It also receives signals including data related to detection from various detection units included in the indoor unit 13 and sends them to the outdoor unit control unit 51 .

As described above, the outdoor unit control section 51 is connected to the indoor unit control section 53 via the communication line 63, which is a wired, wireless, or other communication medium. The outdoor unit controller 51 cooperates with the indoor unit controller 53 by transmitting and receiving various signals via the communication line 63 to control the entire air conditioner 1 . In this way, the outdoor unit control section 51 functions as a device that controls the air conditioner 1.

The outdoor unit control section 51 and the indoor unit control section 53 collect data related to the detection of the room temperature detection section 41, the surface temperature detection section 43, and other detection sections (not shown) and the settings of the air conditioner 1 set by the user. Based on the data, the operation performed by the air conditioning section of the air conditioner 1 is controlled. Specifically, for example, the outdoor unit control section 51 controls the drive frequency of the compressor 21, switching of the four-way valve 22, the rotation speed of the outdoor blower 31, and the opening degree of the expansion valve 24. Further, the indoor unit control section 53 controls the rotation speed of the indoor blower 33, etc. Here, the outdoor unit control section 51 may control the rotation speed of the indoor blower 33. Furthermore, the indoor unit control section 53 may control the driving frequency of the compressor 21, switching of the four-way valve 22, the rotational speed of the outdoor blower 31, or the opening degree of the expansion valve 24. In this way, the outdoor unit control section 51 and the indoor unit control section 53 output various operation commands to the equipment of the air conditioning section according to the operation command given to the air conditioning apparatus 1.

Further, a remote controller 55 is arranged in the indoor space 71. Remote controller 55 has an input device and a display device (not shown). The remote controller 55 transmits and receives various signals to and from an indoor unit control section 53 included in the indoor unit 13. For example, a user of the air conditioner 1 operates the remote controller 55 to input an operation command to the air conditioner 1. Operation commands include, for example, a command to switch between running and stopping, a command to switch operation modes (cooling, heating, dehumidification, humidification, humidification, air purification, ventilation, etc.), a command to switch target temperature, a command to switch target humidity, Examples include an air volume switching command, a wind direction switching command, and a timer switching command. The air conditioner 1 mainly performs operations related to air conditioning according to the input operation command.

<Refrigerating cycle in cooling operation>
Here, the operation related to air conditioning of the air conditioning unit will be explained. First, the "cooling" operation mode will be explained. Upon receiving the "cooling" operation command from the remote controller 55, the outdoor unit control unit 51 switches the flow path of the four-way valve 22 so that the refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23. Furthermore, the outdoor unit control section 51 opens the expansion valve 24 and drives the compressor 21 and the outdoor blower 31. Further, upon receiving the "cooling" operation command, the indoor unit control section 53 drives the indoor blower 33.

When the compressor 21 is driven, the refrigerant discharged from the compressor 21 passes through the four-way valve 22 and flows into the outdoor heat exchanger 23. The refrigerant that has flowed into the outdoor heat exchanger 23 exchanges heat with the outdoor air sucked in from the outdoor space 72 to condense and liquefy, and then flows into the expansion valve 24 . The refrigerant that has flowed into the expansion valve 24 is depressurized by the expansion valve 24 and then flows into the indoor heat exchanger 25 . The refrigerant that has flowed into the indoor heat exchanger 25 exchanges heat with the indoor air sucked in from the indoor space 71 and evaporates, then passes through the four-way valve 22 and is sucked into the compressor 21 again. As the refrigerant flows in this way, the indoor air sucked in from the indoor space 71 is cooled by the indoor heat exchanger 25. The amount of heat exchanged between the refrigerant and indoor air in the indoor heat exchanger 25 is called cooling capacity.

<Refrigerating cycle in heating operation>
Next, the "heating" operation mode will be explained. Upon receiving the "heating" operation command from the remote controller 55, the outdoor unit control unit 51 switches the flow path of the four-way valve 22 so that the refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 25. Furthermore, the outdoor unit control section 51 opens the expansion valve 24 and drives the compressor 21 and the outdoor blower 31. Further, upon receiving the "heating" operation command, the indoor unit control section 53 drives the indoor blower 33.

When the compressor 21 is driven, the refrigerant discharged from the compressor 21 passes through the four-way valve 22 and flows into the indoor heat exchanger 25. The refrigerant that has flowed into the indoor heat exchanger 25 exchanges heat with the indoor air sucked in from the indoor space 71, condenses and liquefies, and flows into the expansion valve 24. The refrigerant that has flowed into the expansion valve 24 is depressurized by the expansion valve 24 and then flows into the outdoor heat exchanger 23 . The refrigerant flowing into the outdoor heat exchanger 23 exchanges heat with the outdoor air drawn in from the outdoor space 72 and evaporates, and then passes through the four-way valve 22 and is drawn into the compressor 21 again. As the refrigerant flows in this way, the indoor air sucked in from the indoor space 71 is heated by the indoor heat exchanger 25. The amount of heat exchanged between the refrigerant and indoor air in the indoor heat exchanger 25 is called heating capacity.

FIG. 3 is a diagram showing a functional configuration of the outdoor unit control section 51 in the air conditioner 1 according to the first embodiment. As shown in FIG. 3, the outdoor unit control section 51 of the air conditioner 1 functionally includes an air temperature acquisition section 310, a surface temperature acquisition section 320, an air conditioning control section 330, a setting section 340, and an index acquisition section 350. Be prepared.

The processing performed by each unit is realized by the control unit 101 included in the outdoor unit control unit 51 described above executing software, firmware, or a combination of software and firmware. The software and firmware are written as a program, such as a ventilation notification program, and are stored in the ROM or storage unit 102 of the outdoor unit control unit 51. Then, the control unit 101 of the outdoor unit control unit 51 realizes each function of the air conditioner 1 by causing the CPU to execute a program stored in the ROM or the storage unit 102.

The air temperature acquisition unit 310 acquires the room temperature of the indoor space 71 as data. Here, the air temperature acquisition unit 310 acquires the room temperature detected by the room temperature detection unit 41 installed in the indoor unit 13.

Here, the room temperature detection section 41 periodically transmits a signal including temperature data indicating the detected room temperature to the outdoor unit control section 51 via the indoor unit control section 53 and the communication line 63 at a predetermined period. do. Here, it is assumed that a signal is periodically sent from the room temperature detection section 41 side, but the air temperature acquisition section 310 makes a request to the room temperature detection section 41 as necessary, and the room temperature detection section 41 responds to the request and sends a signal to the room temperature detection section 41. A signal containing data may also be transmitted. In this way, the air temperature acquisition unit 310 acquires data on the room temperature in the indoor space 71 from the room temperature detection unit 41. Therefore, the air temperature acquisition section 310 is realized by the control section 101 cooperating with the communication section 104. The air temperature acquisition section 310 functions as an air temperature acquisition means.

The surface temperature acquisition unit 320 acquires the surface temperature of the frame in the indoor space 71. The frame in the indoor space 71 refers to structures such as walls, floors, ceilings, columns, etc. that surround the indoor space 71 in the house 3. The surface temperature acquisition unit 320 acquires the surface temperature detected by the surface temperature detection unit 43 as data as the surface temperature of the building frame in the indoor space 71.

The above-mentioned surface temperature detection section 43 periodically sends a signal containing data on the body temperature, which is the detected surface temperature, to the outdoor unit control section via the indoor unit control section 53 and the communication line 63 at a predetermined period. Send to 51. Here, it is assumed that the surface temperature acquisition section 320 side sends a signal periodically, but the surface temperature acquisition section 320 transmits a request to the surface temperature detection section 43 as necessary, and the surface temperature detection section 43 makes a request. In response to this, a signal including body temperature data may be transmitted. In this way, the surface temperature acquisition section 320 acquires data on the body temperature in the indoor space 71 detected by the surface temperature detection section 43 from the surface temperature detection section 43 . The surface temperature acquisition section 320 is realized by the control section 101 cooperating with the communication section 104. The surface temperature acquisition section 320 functions as a surface temperature acquisition means.

The air conditioning control unit 330 controls the equipment of the air conditioning unit and controls the air conditioning of the indoor space 71. The air conditioning control section 330 communicates with the indoor unit control section 53 via the communication section 104 and cooperates with the indoor unit control section 53 to cause the air conditioning section to perform air conditioning. Specifically, the air conditioning control unit 330 switches the flow path of the four-way valve 22 according to the operation mode, adjusts the opening degree of the expansion valve 24, and drives the compressor 21, outdoor blower 31, and indoor blower 33. let The air conditioning control section 330 is realized by the control section 101 cooperating with the timekeeping section 103 and the communication section 104. The air conditioning control section 330 functions as an air conditioning control means.

When the air conditioning control unit 330 determines that the room temperature has reached the thermo-off point Toff based on the room temperature data acquired by the air temperature acquisition unit 310, it stops driving the compressor 21. Furthermore, when the air conditioning control unit 330 determines that the room temperature has reached the thermo-on point Ton based on the room temperature data acquired by the air temperature acquisition unit 310, it starts driving the compressor 21. The thermo-off point Toff is a temperature at which the compressor 21 should stop driving, which is set to prevent air conditioning from becoming too effective. The thermo-on point Ton is the temperature at which the compressor 21, which has stopped operating, should restart its operation. Hereinafter, stopping and starting the drive of the compressor 21 will be referred to as "thermo off" and "thermo on", respectively. Further, the thermo-off point Toff and the thermo-on point Ton are respectively referred to as a "thermo-off point Toff" and a "thermo-on point Ton."

The room temperature reaching the thermo-off point Toff means that the room temperature rises from a temperature lower than the thermo-off point Toff to above the thermo-off point Toff, or the room temperature falls from a temperature higher than the thermo-off point Toff to below the thermo-off point Toff. means. Similarly, when the room temperature reaches the thermo-on point Ton, the room temperature rises from a temperature lower than the thermo-on point Ton to above the thermo-on point Ton, or when the room temperature rises from a temperature higher than the thermo-on point Ton to below the thermo-on point Ton. means to decrease.

To explain in more detail, the air conditioning control unit 330 determines, based on the room temperature data acquired by the air temperature acquisition unit 310, that when the room temperature reaches the thermo-off point Toff and the prohibition time has elapsed since the drive of the compressor 21 was stopped. If it is determined that the time has elapsed, driving of the compressor 21 is started.

Here, the prohibited time is the time required from when the compressor 21 stops driving until it starts driving again, and is a time set for the purpose of protecting the compressor 21. Immediately after the compressor 21 stops driving, the electric motor cannot rotate because the pressure difference within the refrigeration cycle circuit is large. Attempting to drive the compressor 21 in such a state will lead to failure. Therefore, a prohibition time period is set for the compressor 21 during which the compressor 21 is prohibited from starting its operation immediately after the drive is stopped. The prohibited time is set to, for example, several tens of seconds to several minutes. Since such a prohibited time is stipulated, the air conditioning control unit 330 does not control the air conditioning control unit 330 until the prohibited time elapses after stopping the drive of the compressor 21, even if the room temperature has reached the thermo-on point Ton. Do not start driving the compressor 21. Therefore, depending on the surrounding environment, the room temperature may change between the time when the compressor 21 stops driving and the time when the prohibited time has elapsed and the operation can be resumed, reducing the comfort in the indoor space 71. There is.

In addition, the setting unit 340 sets the temperature at the thermo-off point Toff based on the body temperature, as will be described later. Further, the setting section 340 is connected to the notification section 58 and performs processing related to notification of natural ventilation. The setting section 340 is realized by the control section 101. The setting unit 340 functions as a setting means.

The index acquisition unit 350 acquires data related to detection by detection units other than the room temperature detection unit 41 and the surface temperature detection unit 43 as an index for predicting the amount of change in room temperature in the indoor space 71 (hereinafter referred to as room temperature change amount). . Specifically, data included in signals from the outdoor temperature detection section 42, the window opening/closing detection section 45, the solar radiation amount detection section 47, and the human body detection section 49 is acquired.

<Parameters for room temperature calculation>
The change in room temperature after the compressor 21 stops driving depends on the surrounding environment. Here, factors that affect room temperature will be explained.

FIG. 4 is a diagram showing the state of heat transfer in the house 3. As shown in FIG. 4, heat moves between the indoor space 71 and the outdoor space 72 via the walls of the house 3, windows 4, gaps, ventilation equipment, and the like. As a result of such heat transfer, the room temperature in the indoor space 71 fluctuates due to various factors. Roughly speaking, the room temperature in the indoor space 71 is determined by the body temperature in the indoor space 71, the internal heat generation in the indoor space 71, the heat flowing into the indoor space 71 from the outdoor space 72, the area of the walls and floor of the indoor space 71, and the time. As a function of , it is determined as in equation (1).

Room temperature = function (body temperature, internal heat generation,
Air inflow heat, wall and floor area, time) …(1)

The building body temperature of the indoor space 71 is the surface temperature of the building blocks such as walls, floors, ceilings, and columns of the indoor space 71, and is detected by the surface temperature detection unit 43 and acquired by the surface temperature acquisition unit 320, as described above. do. The frame temperature is determined as shown in equation (2) as a function of the temperature of the outer wall of the house 3, the solar radiation passing through the window 4 of the indoor space 71, the insulation performance of the indoor space 71, and time.

Body temperature = function (outer wall temperature,
Solar radiation passing through window 4, insulation performance, time) …(2)

The temperature of the exterior wall is a function of solar radiation, outside temperature, and time. In other words, the frame of the indoor space 71 receives heat from sunlight and the outside air through the outer wall of the house 3. Further, the frame in the indoor space 71 receives heat directly from sunlight passing through the window 4 . The solar radiation passing through the window 4 is a function of the performance of the window 4 and the area of the window 4. The performance of the window 4 can be estimated by the solar heat gain rate, which indicates how easily solar radiation enters the indoor space 71 from the window 4. Here, the μ value, which is a solar radiation acquisition coefficient, or the ηA value, which is an average solar radiation acquisition rate, can be used as the solar radiation acquisition rate. The heat insulation performance of the indoor space 71 can be estimated by the heat transfer coefficient, which indicates the ease of heat transfer. As the heat transmission coefficient, the UA value, which is the average heat transmission coefficient of the outer skin, or the Q value, which is the heat loss coefficient, can be used.

The internal heat generation amount of the indoor space 71 is the amount of heat generated from people, lighting, heaters, etc. inside the indoor space 71. The internal calorific value is expressed as a function of the number of people in the room 71, which is the number of people in the indoor space 71, and the respective calorific values from the lighting, home appliances, and combustion equipment installed in the indoor space 71, as shown in equation (3). It is determined as follows.

Internal heat generation = function (number of people in the room,
lighting, home appliances, combustion appliances) …(3)

The air inflow heat from the outdoor space 72 to the indoor space 71 is the heat of the air that flows into the indoor space 71 from the outdoor space 72 via the windows 4, doors, gaps, ventilation equipment, etc. of the house 3. The air inflow heat is determined as shown in equation (4) as a function of the air volume in the outdoor space 72, the outside temperature, the room temperature of the room adjacent to the indoor space 71, and the area equivalent to a gap indicating the airtightness of the indoor space 71. Here, the gap equivalent area is also called the C value.

Air inflow heat = function (air volume, outside temperature,
Room temperature of adjacent room, area equivalent to gap) …(4)

FIG. 5 is a diagram showing an example of the relationship between body temperature and room temperature. FIG. 5 shows differences in changes in room temperature due to differences in body temperature after driving of the compressor 21 is stopped during heating operation. The room temperature in the indoor space 71 changes under the influence of various parameters, but in the short term, it changes most under the influence of the body temperature. In FIG. 5, the solid line represents the change in room temperature when the body temperature in the indoor space 71 is relatively high. Moreover, the broken line represents a change in the room temperature when the body temperature in the indoor space 71 is relatively low.

As shown in FIG. 5, after the temperature rises to the thermo-off point Toff and the compressor 21 stops driving, when the body temperature is relatively low, the room temperature is higher than when the body temperature is relatively high. , significantly decreases. This is because, during heating operation, the room temperature immediately after the thermostat is turned off rapidly drops until it reaches the same level as the body temperature, and then slowly decreases to the same level as the body temperature. Therefore, as shown in FIG. 5, assuming that the drive of the compressor 21 is stopped at the same thermo-off point Toff, when the body temperature is relatively low, the prohibition time time0 is longer than when the body temperature is relatively high. During this period, there is a high possibility that the room temperature will change beyond the thermo-on point Ton. If the room temperature changes beyond the thermo-on point Ton, it will become too cold during heating and too hot during cooling. Therefore, the comfort of the indoor space 71 is reduced.

In this way, in order to suppress the room temperature from changing beyond the thermo-on point Ton during the prohibition time time0, the setting unit 340 shown in FIG. 3 sets different thermo-off points Toff depending on the body temperature. . Specifically, the setting unit 340 sets the thermo-off point Toff to a high temperature based on the body temperature acquired by the surface temperature acquisition unit 320 when the body temperature is low. In other words, when the body temperature is the first temperature, the setting unit 340 sets the thermo-off point Toff to a higher temperature than when the body temperature is the second temperature higher than the first temperature.

To explain in more detail, the setting unit 340 determines the prohibition time required from when the compressor 21 stops driving until the compressor 21 resumes driving, based on the body temperature acquired by the surface temperature acquisition unit 320. Predict the amount of room temperature change over time. Generally, the amount of change in room temperature during the prohibited time increases as the difference between the room temperature and the body temperature increases. For example, during heating operation, the lower the body temperature, the larger the amount of change in room temperature, and during cooling operation, the higher the body temperature, the greater the amount of change in room temperature.

The setting unit 340 predicts the amount of change in room temperature from when the compressor 21 stops driving until the prohibited time elapses using the above equation (1). As in the above-mentioned equation (1), the room temperature is determined by a plurality of parameters including the body temperature and time. Here, for the parameters of heat generation, air inflow heat, and wall and floor area included in the above-mentioned equation (1), predefined values may be used, or values related to sensor detection may be used. .

The setting unit 340 predicts the amount of change in room temperature during the prohibited time, and sets the thermo-off point Toff based on the predicted amount of change. Specifically, the setting unit 340 sets the thermo-off point Toff to a temperature obtained by adding or subtracting the predicted amount of change from the thermo-on point Ton, which is the set temperature. During heating operation, the setting unit 340 sets the thermo-off point Toff to a temperature obtained by adding the predicted room temperature change amount to the thermo-on point Ton. As a result, the room temperature drops to the thermo-on point Ton at the timing when the prohibited time after thermo-off ends. On the other hand, during cooling operation, the setting unit 340 sets the thermo-off point Toff to a temperature obtained by subtracting the predicted room temperature change amount from the thermo-on point Ton. As a result, the room temperature rises to the thermo-on point Ton at the timing when the prohibited time after thermo-off ends.

FIG. 6 is a diagram showing an example of the relationship between the body temperature and room temperature during heating operation. Moreover, FIG. 7 is a diagram showing an example of the relationship between the body temperature and the room temperature during cooling operation. The air conditioning control unit 330 stops driving the compressor 21 according to the thermo-off point Toff set by the setting unit 340. In FIGS. 6 and 7, the broken line represents a change in the room temperature when the body temperature in the indoor space 71 is relatively low, specifically, when the body temperature is the first temperature. On the other hand, the solid line represents the change in the room temperature when the building body temperature in the indoor space 71 is relatively high, specifically, when the building body temperature is a second temperature higher than the first temperature. .

As shown in FIG. 6, during the heating operation, the setting unit 340 sets the thermo-off point Toff1 and the thermo-off point Toff2 to a temperature higher than the thermo-on point Ton. Further, the setting unit 340 sets the thermo-off point Toff1 when the body temperature is relatively low to a higher temperature than the thermo-off point Toff2 when the body temperature is relatively high. If the body temperature is relatively low, the air conditioning control unit 330 stops driving the compressor 21 and turns off the thermostat when the room temperature rises to the thermostat off point Toff1. Further, when the body temperature is relatively high, when the room temperature rises to a thermo-off point Toff2 lower than the thermo-off point Toff1, the air conditioning control unit 330 stops driving the compressor 21 and turns off the thermostat. Hereinafter, the thermo-off point Toff1 and the thermo-off point Toff2 may be referred to as a first drive stop temperature and a second drive stop temperature, respectively.

After the thermostat is turned off, the lower the body temperature, the more the room temperature decreases. At this time, the thermo-off point Toff1 and the thermo-off point Toff2 are set by predicting the amount of change in room temperature at the prohibited time time0. Therefore, the room temperature drops to the thermo-on point Ton, which is the set temperature, at the end of the prohibition time time0. When the room temperature drops to the thermo-on point Ton, the air conditioning control unit 330 starts driving the compressor 21 and turns on the thermostat. As a result, the room temperature begins to rise again. In this way, the room temperature is maintained at a temperature equal to or higher than the set temperature, regardless of the temperature of the body.

On the other hand, during cooling operation, the setting unit 340 sets the thermo-off point Toff1 and the thermo-off point Toff2 to a temperature lower than the thermo-on point Ton, as shown in FIG. Further, the setting unit 340 sets the thermo-off point Toff1 when the body temperature is relatively low to a higher temperature than the thermo-off point Toff2 when the body temperature is relatively high. When the body temperature is relatively low, the air conditioning control unit 330 stops driving the compressor 21 and turns off the thermostat when the room temperature drops to the thermostat off point Toff1. Further, when the body temperature is relatively high, when the room temperature drops to a thermo-off point Toff2 lower than the thermo-off point Toff1, the air conditioning control unit 330 stops driving the compressor 21 and turns off the thermostat.

After the thermostat is turned off, the room temperature rises more as the body temperature increases. At this time, the thermo-off point Toff1 and the thermo-off point Toff2 are set by predicting the amount of change in room temperature at the prohibited time time0. Therefore, the room temperature rises to the thermo-on point Ton, which is the set temperature, at the end of the prohibition time. When the room temperature rises to the thermo-on point Ton, the air conditioning control unit 330 starts driving the compressor 21 and turns on the thermostat. As a result, the room temperature begins to drop again. In this way, the room temperature is maintained at a temperature below the set temperature, regardless of the temperature of the body.

FIG. 8 is a diagram showing the flow of air conditioning control processing performed by the air conditioner 1 according to the first embodiment. The control unit 101 of the air conditioner 1 executes the air conditioning control process shown in FIG. 8 when the air conditioner 1 is heating or cooling the indoor space 71.

In the air conditioning control process shown in FIG. 8, the control unit 101 first predicts the amount of change in room temperature during the prohibited time after the thermostat is turned off, based on the body temperature detected by the surface temperature detection unit 43 (step S1). The prohibition time is a period of time defined to prevent the compressor 21 from restarting immediately after the thermostat is turned off, in order to protect the compressor 21. The control unit 101 predicts how much the room temperature will change during the prohibited time when the drive of the compressor 21 is stopped. Specifically, during the heating operation of the air conditioner 1, the control unit 101 predicts that the lower the body temperature is, the larger the room temperature change will be, and during the cooling operation, the higher the body temperature is, the larger the room temperature change will be. .

After predicting the amount of change in room temperature during the prohibited time, the control unit 101 adjusts the thermo-off point Toff according to the predicted amount of change in room temperature (step S2). Specifically, during heating operation, the control unit 101 sets the thermo-off point Toff to a temperature obtained by adding the predicted room temperature change amount to the thermo-on point Ton. Further, during the cooling operation, the control unit 101 sets the thermo-off point Toff to a temperature obtained by subtracting the predicted room temperature change amount from the thermo-on point Ton. In step S1 and step S2, the control unit 101 functions as the setting unit 340.

After adjusting the thermo-off point Toff, the control unit 101 refers to the room temperature detected by the room temperature detection unit 41 and determines whether the room temperature has reached the thermo-off point Toff (step S3). Specifically, during heating, the control unit 101 determines that the room temperature has reached the thermo off point Toff when the room temperature rises to a temperature equal to or higher than the thermo off point Toff. On the other hand, during cooling, the control unit 101 determines that the room temperature has reached the thermo off point Toff when the room temperature has decreased to a temperature below the thermo off point Toff.

If it is determined that the room temperature has not reached the thermo-off point Toff (step S3; NO), the control unit 101 stays in step S3 and waits until the room temperature reaches the thermo-off point Toff.

On the other hand, if it is determined that the room temperature has reached the thermo-off point Toff (step S3; YES), the control unit 101 turns off the thermostat of the air conditioner (step S4). Specifically, the control unit 101 controls the compressor 21 to change the rotation speed to 0, thereby stopping the drive of the compressor 21. As a result, air conditioning of the indoor space 71 by the air conditioner 1 is stopped.

When the air conditioner turns off the thermostat, the control unit 101 refers to the room temperature detected by the room temperature detection unit 41 and determines whether the room temperature has reached the thermoon point Ton (step S5). Specifically, during heating, the control unit 101 determines that the room temperature has reached the thermo-on point Ton when the room temperature has decreased to a temperature equal to or lower than the thermo-on point Ton. On the other hand, during cooling, when the room temperature rises to a temperature equal to or higher than the thermo-on point Ton, the control unit 101 determines that the room temperature has reached the thermo-on point Ton.

If the room temperature has not reached the thermo-on point Ton (step S5; NO), the control unit 101 stays in step S5 and waits until the room temperature reaches the thermo-on point Ton.

On the other hand, if the room temperature has reached the thermo-on point Ton (step S5; YES), the control unit 101 further determines whether a prohibited time has elapsed since the air conditioning unit turned off the thermostat (step S6). Specifically, the control unit 101 determines whether or not the elapsed time since the air conditioner turned off the thermostat exceeds a predefined prohibited time based on the time measured by the timer 103.

When the control unit 101 determines that the prohibited time has not elapsed since the air conditioning unit turned off the thermostat (step S6; NO), the control unit 101 stays in step S6 and determines that the prohibited time has not elapsed since the air conditioning unit turned off the thermostat. Wait until In other words, even if the room temperature has reached the thermo-on point Ton, the control unit 101 does not allow the air conditioning unit to turn on the thermostat unless the prohibited time has elapsed since the air conditioning unit turned off the thermostat.

On the other hand, when the control unit 101 determines that the prohibited time has elapsed since the air conditioning unit turned off the thermostat (step S6; YES), the control unit 101 causes the air conditioning unit to turn on the thermostat (step S7). Specifically, the control unit 101 starts driving the compressor 21 by controlling the compressor 21 and changing the rotation speed to a value corresponding to the set temperature. Thereby, the air conditioner 1 starts air conditioning the indoor space 71. Here, in steps S3 to S7, the control section 101 functions as the air conditioning control section 330.

When the air conditioner turns off the thermostat, the control unit 101 returns the process to step S1 and repeats the processes from step S1 to step S7. In other words, the control unit 101 changes the thermo-off point Toff according to the body temperature, and when the room temperature reaches the thermo-off point Toff, turns off the thermo-off of the air-conditioning section, and when the room temperature reaches the thermo-on-point Ton, turns off the thermo-off of the air-conditioning section. Repeat the thermo-on process.

As described above, the air conditioner 1 according to the first embodiment stops driving the compressor 21 when the room temperature reaches the thermo-off point Toff, and starts driving the compressor 21 when the room temperature reaches the thermo-on point Ton. By doing so, the indoor space 71 is air-conditioned. At this time, when the frame temperature in the indoor space 71 is relatively low, the air conditioner 1 sets the thermo-off point Toff to a higher temperature than when the frame temperature in the indoor space 71 is relatively high. , the temperature of the thermo-off point Toff is adjusted according to the body temperature.

In this way, by adjusting the thermo-off point Toff according to the body temperature, the room temperature changes beyond the thermo-on point Ton, which is the set temperature, during the prohibited time when the compressor 21 cannot be restarted immediately after the thermostat is turned off. This can be suppressed. Therefore, comfort in the indoor space 71 can be improved. Further, when the control unit 101 predicts that the amount of change in room temperature is small, the drive of the compressor 21 can be stopped early. Therefore, the air conditioner 1 of the first embodiment can reduce power consumption related to air conditioning.

Embodiment 2.
Next, an air conditioner 1 according to a second embodiment will be described. The air conditioner 1 according to the first embodiment predicts the amount of change in room temperature based on the body temperature and adjusts the thermo-off point Toff. On the other hand, in the air conditioner 1 according to the second embodiment, the outdoor unit control unit 51 further includes the outside temperature data acquired by the outdoor temperature detection unit 42 as an index for predicting the amount of change in the room temperature. It performs processing.

As shown in FIG. 4 and equation (2) described in Embodiment 1, the frame temperature in the indoor space 71 changes as it receives heat from the temperature of the outer wall of the house 3. Furthermore, the temperature of the outer wall of the house 3 changes as it receives heat from the outside temperature. Therefore, the body temperature in the indoor space 71 changes depending on the outside temperature. For example, when the outside temperature rises, the body temperature increases with a delay of several hours, and when the outside temperature falls, the body temperature gradually decreases. In this way, changes in the body temperature can be predicted based on the outside temperature. Therefore, by acquiring the outside air temperature, the amount of change in room temperature in the indoor space 71 can be predicted further in advance than when only the body temperature is used.

The setting unit 340 of the second embodiment sets the thermo-off point Toff according to the data of the body temperature acquired by the surface temperature acquisition unit 320 and the outside temperature acquired by the index acquisition unit 350 described above. Specifically, similar to the setting section 340 of Embodiment 1, the setting section 340 sets the thermo-off point Toff to a higher temperature as the body temperature is lower. On the other hand, the setting unit 340 sets the temperature of the thermo-off point Toff so that the temperature of the thermo-off point Toff is higher when the outside temperature is relatively low than when the outside temperature is relatively high, provided that the body temperature is the same. Set. The air conditioning control unit 330 thus stops driving the compressor 21 according to the thermo-off point Toff set by the setting unit 340 according to the body temperature and the outside air temperature.

On the other hand, during cooling operation, the setting unit 340 sets the thermo-off point Toff1 and the thermo-off point Toff2 to a temperature lower than the thermo-on point Ton. Further, the setting unit 340 sets the thermo-off point Toff1 when the outside temperature is relatively low to a higher temperature than the thermo-off point Toff2 when the outside temperature is relatively high. In this way, by setting the thermo-off point Toff1 and the thermo-off point Toff2 according to the outside temperature, the compressor 21 is stopped early if the room temperature is predicted to drop because the outside temperature is low. . Thereby, it is possible to prevent the indoor space 71 from becoming too cold, improving comfort and reducing power consumption. Furthermore, when the outside temperature is high and the room temperature is expected to rise, the compressor 21 operates for a long time. Therefore, the air conditioner 1 can sufficiently cool the air.

As explained above, the air conditioner 1 according to the second embodiment is based on the outside temperature in addition to the body temperature, and sets the thermo-off point Toff and the thermo-off point Toff according to the body temperature and the outside temperature. adjust. By setting the thermo-off point using the outside temperature, it is possible to accurately predict further changes in the room temperature. Therefore, the thermo-off point Toff and the thermo-off point Toff can be set more accurately, and the comfort in the indoor space 71 can be further improved.

Here, the outdoor temperature detection section 42 may be installed at a location other than the outdoor unit 11. For example, the index acquisition unit 350 may acquire a signal including data on the outside temperature detected by a temperature sensor installed outside the house 3 via an external telecommunications line or the like. In addition, the outdoor temperature detection unit 42 is not limited to a temperature sensor or the like, but also acquires data on the outside temperature such as weather forecasts and meteorological data via an external telecommunications line. may be detected.

Embodiment 3.
Next, Embodiment 3 will be described. In the third embodiment, the setting unit 340 described above performs processing related to notification regarding natural ventilation according to the body temperature acquired by the surface temperature acquisition unit 320 and the outside temperature acquired by the index acquisition unit 350. Based on the processing, the setting unit 340 sends a notification signal to the notification unit 58 to notify the user. Hereinafter, ventilation basically refers to natural ventilation in which ventilation is performed by opening windows 4 or the like without using ventilation equipment.

To be more specific, the setting unit 340 predicts the amount of future room temperature change based on the data regarding the body temperature acquired by the surface temperature acquisition unit 320 and the outside temperature acquired by the index acquisition unit 350. If the setting unit 340 determines that the environmental conditions are suitable for ventilation based on the predicted amount of change in room temperature, the setting unit 340 sends a notification signal urging ventilation to the notification unit 58 to notify the user. The setting unit 340 also determines whether the ventilation has ended, and sends a notification signal urging the end of the ventilation to the notification unit 58 to notify the user.

For example, when the setting unit 340 predicts that the room temperature will become lower due to the influence of the outside temperature in summer and the heat load in the indoor space 71 will decrease, it sends a notification signal to the notification unit 58 to urge ventilation. Furthermore, if the prediction changes from a low room temperature to a high room temperature, it is predicted that the room temperature will become higher after that, so a notification is issued to encourage ventilation. The heat load in the indoor space 71 is small and ventilation is encouraged while the room is in thermal equilibrium. This makes it possible to exchange air while preventing energy loss to the indoor environment and saving energy. It is also believed that ventilating the indoor space 71 is effective in preventing infectious diseases.

FIG. 9 is a diagram showing the flow of processing related to ventilation notification in the third embodiment. Here, the processing performed by the setting section 340, surface temperature acquisition section 320, and index acquisition section 350 described above is substantially performed by the control section 101. Therefore, here, the description will be made assuming that the control unit 101 performs the processing.

The control unit 101 executes ventilation notification processing shown in FIG. 9 . The control unit 101 performs thermal load response control to predict the amount of change in room temperature in the indoor space 71 (step S110). Here, as described in the first embodiment, the control unit 101 predicts the amount of change in the room temperature based on the body temperature detected by the surface temperature detection unit 43. However, it is not limited to this. As described in the first embodiment, the frame temperature in equation (2) changes depending on the temperature of the walls in the house 3, and the wall temperature is influenced by the outside air temperature. Therefore, as described in the second embodiment, the control unit 101 uses the outside temperature data detected by the outdoor temperature detection unit 42. The amount of change in room temperature may be predicted by, for example, correcting data on the body temperature detected by the surface temperature detection unit 43.

The control unit 101 performs a heat load trend determination to determine a future trend of heat load based on the prediction of the amount of change in room temperature (step S120). As shown in FIG. 9, in the third embodiment, the control unit 101 determines whether the thermal load trend is an increasing trend, an intermediate trend, or a decreasing trend. If the control unit 101 predicts that the amount of change in room temperature is within a predetermined set change amount range, it determines that the heat load in the indoor space 71 is in an intermediate tendency that does not increase or decrease. Furthermore, when the control unit 101 predicts that the amount of change in room temperature will be greater than the set change range, the control unit 101 determines that the heat load will increase and will tend to increase. When the control unit 101 predicts that the amount of change in room temperature will be less than the set change range, the control unit 101 determines that the heat load is decreasing and is on a decreasing trend. Here, the control unit 101 determines the heat load trends in three patterns: increase, decrease, and intermediate, but may determine trends in two patterns, increase and decrease.

FIG. 10 is a diagram illustrating changes in the tendency of thermal load in the third embodiment. First, in the case of a change from an intermediate trend to a decreasing trend, as shown in Figure 10, for example, assuming summer, when the sun goes down and the outside temperature drops from midday to evening, the amount of room temperature change The predicted trend of heat load changes from an intermediate trend to a decreasing trend. On the other hand, in the case of a change from an intermediate trend to an increasing trend, as shown in Figure 10, for example, assuming summer, when the morning sun begins to shine and the outside temperature rises, the heat load is calculated by predicting the amount of room temperature change. The trend changes from an intermediate trend to an increasing trend.

When the control unit 101 determines that the change in the heat load is small, changes from an intermediate trend to an increasing trend, or changes from an intermediate trend to a decreasing trend based on the amount of change in room temperature, the controller 101 sends a notification signal to the notification unit 58 to urge ventilation. A ventilation notification determination is performed to determine whether or not to send the ventilation information to the patient (step S130). For example, if the ventilation notification setting of the remote controller 55 is set to not notify, the notification signal will not be sent to the notification unit 58. If the control unit 101 determines not to send the notification signal to the notification unit 58, the process returns to step S110. Further, when the control unit 101 determines to send a notification signal to prompt the start of ventilation, it sends a notification signal to the notification unit 58 to notify the notification to urge ventilation (step S140).

Then, the control unit 101 determines whether to end ventilation (step S150). In the third embodiment, the control unit 101 makes the determination based on, for example, whether or not a set end time has elapsed since sending a notification signal urging ventilation to the notification unit 58. However, there are no particular limitations regarding the determination regarding the end of ventilation. Here, the clock section 103 measures the time. When the control unit 101 determines to end the ventilation, it sends a notification signal urging the end of the ventilation to the notification unit 58 (step S160).

FIG. 11 is a diagram showing an example of notification by the notification unit 58. Here, the notification unit 58 that provides notification regarding ventilation based on the notification signal will be described. FIG. 11 shows an example in which a display related to ventilation is displayed on a display device included in the remote controller 55. Here, as described above, the notification by the notification unit 58 is not limited to display. For example, a sound generating device such as a buzzer included in the indoor unit 13 may be used as the notification section 58 to provide notification by ringing. Further, a light emitting device such as an LED lamp included in the indoor unit 13 may be used as the notification section 58 to provide notification by lighting, flashing, etc. The notification unit 58 that notifies the user to start ventilation may be different from the notification unit 58 that notifies the user that the end of ventilation is required.

As described above, according to the third embodiment, the control unit 101 predicts the amount of change in room temperature from the data of the body temperature detected by the surface temperature detection unit 43, and adjusts the predicted trend of the heat load in the indoor space 71. Based on this, a notification signal is sent to the notification unit 58 to urge the user to start ventilation. Therefore, ventilation can be performed at a timing when there is little change in the heat load in the indoor space 71, and energy saving can be achieved. For example, when the air conditioner 1 performs air conditioning, energy saving can be directly achieved in the operation of the air conditioner 1. Further, even if the air conditioner 1 is not in operation, an increase in heat load due to ventilation can be suppressed, and energy savings can be expected, such as not having to operate the air conditioner 1.

Embodiment 4.
Next, Embodiment 4 will be described. The setting unit 340 included in the outdoor unit control unit 51 of the fourth embodiment determines whether there is a person in the indoor space 71 based on the detection by the human body detection unit 49 included in the indoor unit 13, and sends a notification signal to the notification unit 58. Decide whether to send or not. This is because even if the notification is made when no one is in the indoor space 71, the window 4 will not be opened or closed.

FIG. 12 is a diagram showing the flow of processing related to ventilation notification according to the fourth embodiment. Processes with the same step numbers as those in FIG. 9 are performed in the same manner as described in the third embodiment. Step S110 and step S120 are the same as the processing described in the third embodiment.

In the fourth embodiment, in the heat load trend determination in step S120, if the control unit 101 determines that the heat load changes from an intermediate trend to an increasing trend or from an intermediate trend to a decreasing trend, the control unit 101 prevents people from entering the indoor space 71. It is determined whether there is a person (step S121). Here, the control unit 101 makes a determination based on the detection by the human body detection unit 49. When the control unit 101 determines that there is no person in the indoor space 71, the process returns to step S110.

On the other hand, if the control unit 101 determines that there is a person in the indoor space 71, it determines whether to send a notification signal to the notification unit 58 to prompt the start of ventilation (step S130). The processing after step S130 is the same as in the third embodiment.

As described above, according to the fourth embodiment, when the control unit 101 determines that there is no person in the indoor space 71, the control unit 101 does not send a notification signal and does not issue a notification regarding ventilation. Therefore, meaningless notifications, such as notifications made when no one is opening or closing the window 4, can be prevented.

Embodiment 5.
Next, Embodiment 5 will be described. In the fifth embodiment, the control unit 101 acquires solar radiation data detected by the solar radiation detection unit 47 as an index for predicting the amount of change in room temperature in the indoor space 71. Data acquisition is performed by the processing of the index acquisition unit 350.

Solar radiation is the amount of radiant energy received from the sun. As described above, the solar radiation amount detection unit 47 is installed in a place where the amount of solar radiation can be detected, such as the indoor unit 13, near the window 4 of the indoor space 71, or the outdoor space 72, to detect the amount of solar radiation. . The control unit 101 acquires solar radiation data included in the signal detected by the solar radiation detection unit 47 via the communication unit 104 .

As shown in FIG. 4 and equation (2) described in Embodiment 1, the body temperature of the house 3 changes as it receives heat from sunlight passing through the windows 4. Moreover, the temperature of the outer wall of the house 3 changes as it receives heat from sunlight. Therefore, the body temperature in the indoor space 71 changes depending on the amount of solar radiation. For example, when the outer wall of the house 3 is heated by sunlight, the heat passes through the wall, increasing the flow load and increasing the body temperature. Furthermore, when the solar radiation entering through the window 4 hits the inner wall, the solar radiation load increases and the temperature of the building frame gradually rises. On the other hand, when sunlight disappears, the body temperature gradually decreases. In this way, changes in body temperature can be predicted based on the amount of solar radiation. Therefore, the control unit 101 acquires the solar radiation data included in the signal detected by the solar radiation detection unit 47 and corrects the body temperature data detected by the surface temperature detection unit 43 to prevent changes in room temperature. Used for volume prediction. Thereby, the amount of change in room temperature in the indoor space 71 can be predicted further in advance than when the surface temperature of the surface temperature detection unit 43 is used as the body temperature. The prediction of the amount of change in room temperature is performed by the processing of the setting unit 340.

In this way, the control unit 101 in the fifth embodiment uses the solar radiation data detected by the solar radiation detection unit 47 to predict the amount of change in room temperature. By using data on the amount of solar radiation, it is possible to accurately predict the amount of room temperature change in the future. Therefore, it is possible to more accurately set the timing for issuing notifications to prompt the start of ventilation, etc. In addition, the operability in the indoor space 71 can be further improved.

Here, in Embodiment 5, the solar radiation amount detection section 47 has been described as having an infrared sensor, but is not limited to this. For example, the solar radiation detection unit 47 may include an illuminance sensor and obtain solar radiation data from illuminance data. Further, the solar radiation amount detection unit 47 may include a camera or the like, and obtain data on the solar radiation amount from data of a visible image of the indoor space 71 taken by the camera. Furthermore, the solar radiation amount detection section 47 may be a device capable of obtaining data on the amount of power generated by a solar power generation facility, a weather forecast, or the weather, etc., to obtain data on the amount of solar radiation.

Embodiment 6.
Next, an air conditioner 1 according to a sixth embodiment will be described. In the fifth embodiment, the control unit 101 acquires data related to the insulation performance of the frame of the house 3 having the indoor space 71 as index data for predicting the amount of change in room temperature in the indoor space 71 . Data acquisition is performed by the processing of the index acquisition unit 350.

The insulation performance of the frame of the house 3, which is a building, is an index indicating the ease with which heat is transferred between the indoor space 71 and the outdoor space 72. The heat insulation performance can be estimated by the average heat transmission coefficient or heat loss coefficient of the outer skin. The control unit 101 acquires data on insulation performance input by the user into the remote controller 55. Further, the control unit 101 may acquire information indicating the heat insulation performance of the indoor space 71 by performing a learning process from the past air conditioning performance of the air conditioner 1. The acquired data on the heat insulation performance is stored in the storage unit 102, for example. For example, the setting unit 340 and the like perform learning processing.

As shown in FIG. 4 and equation (2) described in Embodiment 1, the body temperature of the house 3 changes depending on the heat insulation performance. The higher the insulation performance, the less likely the room temperature will change during ventilation, and the lower the insulation performance, the easier the room temperature will change during ventilation. Therefore, the control unit 101 acquires the insulation performance data and uses it for predicting the amount of change in room temperature, such as calculating the body temperature. Thereby, the amount of change in room temperature in the indoor space 71 can be predicted further in advance than when the surface temperature of the surface temperature detection unit 43 is used as the body temperature. The prediction of the amount of change in room temperature is performed by the processing of the setting unit 340.

In this manner, the setting unit 340 of the control unit 101 in the fifth embodiment uses data on the insulation performance of the house 3 to predict the amount of change in room temperature. By using data on insulation performance, it is possible to accurately predict the amount of room temperature change in the future. Therefore, notifications to prompt the start of ventilation, etc. can be made at more accurate timing.

Here, in Embodiment 6, the control unit 101 acquires data indicating the size of the indoor space 71 in addition to or in place of the data on the heat insulation performance, and controls the change in room temperature in the indoor space 71. It may also be used as an index for predicting the amount. The control unit 101 may acquire data regarding the size of the indoor space 71 from a signal sent from the remote controller 55, or from an infrared sensor, an image sensor, or the like.

Embodiment 7.
Next, Embodiment 7 will be described. In the seventh embodiment, the control unit 101 acquires the data on the internal heat generation amount of the indoor space 71 described above as index data used when predicting the amount of change in room temperature in the indoor space 71. Data acquisition is performed by the processing of the index acquisition unit 350.

The internal heat generation amount can be estimated based on the number of people in the indoor space 71, the amount of heat generated from the lighting, home appliances, and combustion equipment installed in the indoor space 71, as shown in equation (3) described in Embodiment 1. Can be done. Therefore, the control unit 101 uses data on the body temperature and internal heat generation amount to predict the amount of change in room temperature.

Here, the control unit 101 may obtain data on the internal heat generation amount using settings sent from the remote controller 55, or may obtain data on the number of people in the room, lighting, home appliances, etc. using the human body detection unit 49, infrared sensor, camera, etc. The information may be obtained by detecting heat generated by combustion equipment. Furthermore, the index acquisition unit 350 may acquire data such as the number of people in the room and the usage status of the equipment sent from an external device via a telecommunications line or the like, as data on the amount of internal heat generated.

In this manner, in the seventh embodiment, the control unit 101 acquires the internal heat generation amount as data in addition to the body temperature, and predicts the amount of change in room temperature according to the body temperature and the internal heat generation amount. By using the internal heat generation data, it is possible to accurately predict the amount of room temperature change in the future. Therefore, notifications to prompt the start of ventilation, etc. can be made at more accurate timing. Then, the comfort and energy saving in the indoor space 71 can be further improved.

Embodiment 8.
Next, Embodiment 8 will be described. In the eighth embodiment, the control unit 101 acquires window opening/closing data detected by the window opening/closing detection unit 45 in the indoor space 71 as an index for predicting the amount of change in room temperature in the indoor space 71 . Data acquisition is performed by the processing of the index acquisition unit 350.

FIG. 13 is a diagram showing the flow of processing related to ventilation notification according to the eighth embodiment. Processes with the same step numbers as those in FIG. 9 are performed in the same manner as described in the third embodiment. Step S110 and step S120 are the same as in the third embodiment.

In the fourth embodiment, in the heat load trend determination in step S120, if the control unit 101 determines that the heat load changes from an intermediate trend to an increasing trend or from an intermediate trend to a decreasing trend, the controller 101 determines that the heat load increases. It is determined whether there is a trend (step S122). When the control unit 101 determines that the heat load is on the increase, it determines whether the window 4 is open based on window opening/closing data detected by the window opening/closing detection unit 45 (step S123). When the control unit 101 determines that the window 4 is closed, the process returns to step S110.

On the other hand, if the control unit 101 determines that the window 4 is open, it determines whether to send a notification signal to the notification unit 58 to prompt the start of ventilation (step S130). The processing after step S130 is the same as in the third embodiment.

Here, in the eighth embodiment, the window opening/closing detection unit 45 is based on the opening/closing of the window 4, but the detection is not limited to only the window 4. For example, the opening/closing status of an openable/closable part provided at the boundary between the indoor space 71 and the outdoor space 72, such as a door or a partition, may be detected and used as data. The control unit 101 may acquire data on the opening/closing status of doors, etc. via the remote controller 55, or may acquire data using an infrared sensor or an image sensor. The control unit 101 may also acquire data regarding opening and closing from an external device via a telecommunications line or the like.

As described above, in the eighth embodiment, the control unit 101 sends notification signals related to ventilation notification according to the frame temperature and window opening/closing data based on the window opening/closing data from the window opening/closing detection unit 45 in addition to the building body temperature. Adjust the timing. By using data regarding the opening and closing of the opening/closing section, it is possible to more accurately predict the amount of room temperature change in the indoor space 71, and it is possible to determine whether sufficient ventilation has been performed, thereby improving the operability of the indoor space 71. can be improved.

Here, in the eighth embodiment, in addition to or in place of the window opening/closing data from the window opening/closing detector 45 in the indoor space 71, the control unit 101 determines the operating state of the ventilation equipment installed in the indoor space 71. may be obtained as data. The ventilation equipment is equipment such as a ventilation fan and a range hood that ventilate the indoor space 71. The control unit 101 may acquire data on the operating state of the ventilation equipment via the remote controller 55, an infrared sensor or an image sensor, or an external telecommunications line. You may.

Here, when the ventilation equipment is in operation, a large amount of air moves between the indoor space 71 and the outdoor space 72, so that the heat insulation performance of the indoor space 71 deteriorates. As a result, the room temperature tends to change during natural ventilation. Therefore, the control unit 101 determines that if the body temperature is the same, the window detection setting time, which is the time until ventilation ends, is longer when the ventilation equipment is not operating than when the ventilation equipment is operating. Set it to be longer. In this way, by using data on the operating state of the ventilation equipment, changes in natural ventilation in the indoor space 71 can be predicted more accurately. Therefore, comfort and energy saving in the indoor space 71 can be further improved.

Embodiment 9.
Although various air conditioners 1 and the like have been described in Embodiments 1 to 8, the present invention is not limited to this, and modifications and applications are possible. In each of the embodiments described above, the air conditioner 1 is a ventilation alarm device, and the air conditioner 1 is described as using detections from various detection units included in the air conditioner 1 as data, but the present invention is not limited to this. The ventilation notification device may be a device independent from the air conditioner 1.

Further, for example, in each of the embodiments described above, the room temperature detection section 41 and the surface temperature detection section 43 were installed in the indoor unit 13. However, the room temperature detection section 41 and the surface temperature detection section 43 may be installed anywhere as long as they can detect the desired temperature and amount of solar radiation, respectively. The surface temperature detection unit 43 is not limited to an infrared sensor, but may be a temperature sensor installed on a wall, floor, ceiling, etc. of the indoor space 71 to detect the surface temperature of these.

In each of the embodiments described above, the air conditioner 1 includes one outdoor unit 11 and one indoor unit 13. However, the air conditioner 1 may include one outdoor unit 11 and multiple indoor units 13. Alternatively, the air conditioner 1 includes one outdoor unit 11, a repeater (not shown), a check valve (not shown), and a plurality of indoor units 13, and includes an indoor unit 13 for cooling and an indoor unit 13 for heating. It may also be possible to operate the indoor unit 13 in combination with the indoor unit 13.

Moreover, the positions where the outdoor unit 11 and the indoor unit 13 are installed are not particularly limited. The outdoor unit 11 and the indoor unit 13 may be installed at a distance from each other. For example, the outdoor unit 11 may be installed on the roof of a building (not shown), and the indoor unit 13 may be installed in the ceiling.

In each of the embodiments described above, the control section 101 of the outdoor unit control section 51 includes an air temperature acquisition section 310, a surface temperature acquisition section 320, an air conditioning control section 330, a setting section 340, and an index acquisition section 350. It functioned as a device that controls device 1. However, a part or all of the above-described parts may be provided in the indoor unit control section 53, or may be provided in a device external to the air conditioner 1.

FIG. 14 is a diagram showing an air conditioning system 500 according to Embodiment 9. In each of the embodiments described above, the control device 100 that performs the process related to ventilation notification is described as being performed by the outdoor unit control unit 51 in the outdoor unit 11 of the air conditioner 1, but the invention is not limited to this. . For example, as shown in FIG. 14, an air conditioning system 500 is configured in which an air conditioner 1 and a control device 100 are communicably connected via a communication network 400. The control device 100 includes a control section 101, a storage section 102, a clock section 103, and a communication section 104 shown in FIG. 2, and an air temperature acquisition section 310, a surface temperature acquisition section 320, and an air conditioning control section shown in FIG. 330, the setting section 340 and the index acquisition section 350 may perform the processing. For example, the communication network 400 is an in-home network based on ECHONET Lite (registered trademark), and the control device 100 is a controller for a HEMS (Home Energy Management System) that manages power in the house 3. You can. Furthermore, the communication network 400 may be a public telecommunications line. The control device 100 may be a server or the like that controls the air conditioner 1 from outside the house 3.

When the control device 100 includes each of the above functions, the air conditioning system 500 may control the plurality of air conditioners 1 as control targets. In this case, the number of air conditioners 1 is not limited. The detailed configuration is not limited as long as it is a device including a refrigeration cycle, like the air conditioners 1, 1 to be controlled by the control device 100.

In each of the embodiments described above, the air conditioner 1 was described as being installed in the house 3, but the present invention is not limited to this. For example, the air conditioner 1 may be installed in an apartment complex, an office building, a facility, a factory, or the like. Further, the space to be air-conditioned is not limited to a room in the house 3, but may be any space as long as it is air-conditioned by the air conditioner 1.

In the embodiment described above, the CPU included in the control unit 101 executes the program stored in the storage unit 102 etc., thereby controlling the air temperature acquisition unit 310, the surface temperature acquisition unit 320, the air conditioning control unit 330, and the setting unit. The functions of each part of 340 and index acquisition part 350 were executed. However, the control unit 101 may be dedicated hardware. The dedicated hardware may be, for example, a single circuit, a composite circuit, a programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. When the control unit 101 is dedicated hardware, the functions of each unit may be realized by separate hardware, or the functions of each unit may be realized by a single piece of hardware.

Moreover, some of the functions of each part may be realized by dedicated hardware, and other parts may be realized by software or firmware. In this way, the control unit 101 can implement the above-mentioned functions using hardware, software, firmware, or a combination thereof.

In addition, when an existing computer such as a personal computer or an information terminal device executes a program that defines the operation of the outdoor unit control section 51 or the control device 100, the computer functions as the outdoor unit control section 51 or the control device 100. You can also do it.

Further, the distribution method of such a program is arbitrary; for example, it can be distributed on a computer readable record such as a CD-ROM (Compact Disk ROM), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be stored on a medium and distributed, or it may be distributed via a communication network such as the Internet.

1 Air conditioner, 3 House, 4 Window, 11 Outdoor unit, 13 Indoor unit, 21 Compressor, 22 Four-way valve, 23 Outdoor heat exchanger, 24 Expansion valve, 25 Indoor heat exchanger, 31 Outdoor blower, 33 Indoor blower , 41 room temperature detection section, 42 outdoor temperature detection section, 43 surface temperature detection section, 45 window opening/closing detection section, 47 solar radiation detection section, 49 human body detection section, 51 outdoor unit control section, 53 indoor unit control section, 55 remote controller , 58 notification section, 59 wireless communication section, 61 refrigerant piping, 63 communication line, 71 indoor space, 72 outdoor space, 100 control device, 101 control section, 102 storage section, 103 time measurement section, 104 communication section, 109 bus, 310 Air temperature acquisition unit, 320 Surface temperature acquisition unit, 330 Air conditioning control unit, 340
setting section, 350 index acquisition section, 400 communication network, 500 air conditioning system.

Claims (15)

A ventilation notification device that provides notification regarding ventilation of an indoor space in a building,
a surface temperature detection unit that detects the temperature of the skeleton surface in the indoor space as the skeleton temperature;
a notification unit that performs the notification when a notification signal is sent;
Predicting the amount of change in room temperature in the indoor space from the body temperature, and based on the prediction, the heat load in the indoor space is increasing or decreasing from an intermediate trend within a predetermined range of change. and a control unit that sends the notification signal to the notification unit to prompt the start of natural ventilation. comprising an outside temperature detection unit that detects outside temperature that is the temperature outside the building,
The ventilation notification device according to claim 1, wherein the control unit predicts the amount of change in the room temperature from the outside temperature and the body temperature. comprising a solar radiation amount detection unit that detects the amount of solar radiation incident on the building,
The ventilation notification device according to claim 1 or 2, wherein the control unit corrects the body temperature based on the amount of solar radiation. The ventilation notification device according to any one of claims 1 to 3, wherein the control unit predicts the amount of change in the room temperature, including data related to the insulation performance of the building. The ventilation notification device according to any one of claims 1 to 4, wherein the control unit predicts the amount of change in the room temperature, including data on internal heat generation amount in the indoor space. comprising a window opening/closing detection unit that detects opening/closing of a window of the building,
The ventilation notification device according to any one of claims 1 to 5, wherein the control unit predicts the amount of change in the room temperature, including data on opening and closing of the window. comprising a human body detection unit that detects the presence or absence of a person in the indoor space,
The ventilation notification device according to any one of claims 1 to 6, wherein the control unit does not send the notification signal to the notification unit when determining that the person is absent. The ventilation notification device according to any one of claims 1 to 7, wherein the notification section includes a sound generating device. The ventilation notification device according to any one of claims 1 to 8, wherein the notification section includes a light emitting device. The ventilation notification device according to any one of claims 1 to 9, wherein the notification unit includes a communication unit that sends a signal to an external device. The ventilation notification device according to any one of claims 1 to 10, wherein the notification unit includes a display device. Any one of claims 1 to 11 , wherein the control unit sends the notification signal to urge the natural ventilation to end after a set end time has elapsed after sending the notification signal to the notification unit to urge the natural ventilation. The ventilation alarm device according to paragraph 1. Equipped with a window open/close detector that detects whether a window is open.
Any one of claims 1 to 11 , wherein the control unit sends the notification signal prompting the end of the natural ventilation after a window detection setting time has elapsed after the window opening/closing detection unit detects the opening of the window. The ventilation alarm device according to paragraph 1. The control unit determines whether or not the notification is set not to be performed, and if it is determined that the notification is set not to be performed, the control unit does not send the notification signal to the notification unit. 14. The ventilation alarm device according to any one of Item 13 . A program that provides notification regarding ventilation of indoor spaces in a building,
predicting the amount of change in the room temperature from the body temperature, which is the temperature of the body surface in the indoor space;
Based on the prediction, determining whether the trend of the heat load in the indoor space changes from an intermediate trend within a predetermined set change amount range to an increasing trend or a decreasing trend ;
A ventilation notification program that causes a computer to perform the step of sending a notification signal to prompt the start of natural ventilation and causing a notification unit to make the notification if it is determined that the intermediate trend is in the increasing trend or the decreasing trend .

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